WO2020059105A1 - 空気調和装置 - Google Patents
空気調和装置 Download PDFInfo
- Publication number
- WO2020059105A1 WO2020059105A1 PCT/JP2018/034974 JP2018034974W WO2020059105A1 WO 2020059105 A1 WO2020059105 A1 WO 2020059105A1 JP 2018034974 W JP2018034974 W JP 2018034974W WO 2020059105 A1 WO2020059105 A1 WO 2020059105A1
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- Prior art keywords
- alarm
- unit
- flow rate
- abnormality
- heat exchange
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
-
- 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
-
- 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
- F24F1/0007—Indoor units, e.g. fan coil units
-
- 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
-
- 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
-
- 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
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
-
- 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
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
-
- 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
Definitions
- the present invention relates to an air conditioner that circulates a heat medium to perform air conditioning.
- an air conditioner including an outdoor unit, an indoor unit, and a relay unit provided between the outdoor unit and the indoor unit is known (for example, see Patent Document 1).
- the air conditioner disclosed in Patent Document 1 has a circulation circuit in which a refrigerant circulates between an outdoor unit and a relay unit, and a heat medium circulation circuit in which a heat medium circulates between the relay unit and the indoor unit. .
- the heat medium exchanges heat with the refrigerant circulating in the refrigerant circuit, and in the indoor unit, the heat medium exchanges heat with indoor air.
- the heat medium supplies warm or cold heat to the indoor side, so that the indoor air is conditioned.
- the present invention has been made to solve the above-described problems, and provides an air conditioner that outputs an alarm when an abnormality occurs in an indoor unit that performs air conditioning with heat supplied from a heat medium. is there.
- An air conditioner includes an outdoor unit including a compressor that compresses and discharges a refrigerant to a refrigerant circuit, and a load-side heat exchanger in which a heat medium that has exchanged heat with the refrigerant exchanges heat with air in a space to be air-conditioned. And an alarm unit provided in the indoor unit, wherein the alarm unit is based on the flow rate detected by the flow amount detection unit. Determining means for determining whether or not there is an abnormality in the indoor unit, and abnormality warning means for outputting an alarm when the determining means determines that there is an abnormality in the indoor unit.
- the alarm unit that determines whether or not the indoor unit has an abnormality based on the flow rate of the heat medium is provided, and the alarm unit outputs an alarm when it determines that the indoor unit has an abnormality. Therefore, the user can know that an abnormality has occurred in the indoor unit, and by handling the abnormality, it is possible to prevent the air conditioner from continuing to operate in a state where the indoor unit has an abnormality.
- FIG. 2 is a diagram illustrating a configuration related to control performed by the air-conditioning apparatus illustrated in FIG. 1.
- FIG. 3 is a block diagram illustrating a configuration example of a remote controller illustrated in FIG. 2.
- FIG. 4 is a diagram illustrating another configuration example of the flow rate detection unit illustrated in FIG. 1.
- FIG. 3 is a diagram illustrating another configuration example of the alarm unit illustrated in FIG. 1.
- 2 is a flowchart illustrating an operation procedure of the air-conditioning apparatus illustrated in FIG. 1.
- 5 is a flowchart illustrating another operation procedure of the air-conditioning apparatus illustrated in FIG. 1.
- FIG. 2 is a graph showing an example of a time-series change of a heat medium heat exchange amount in the load-side heat exchanger shown in FIG. 1.
- 3 is a graph illustrating another example of a time-series change in the heat medium heat exchange amount in the load-side heat exchanger illustrated in FIG. 1.
- 5 is a graph showing an example of a time-series change of a heat medium heat exchange amount when filter cleaning is performed each time the warning unit shown in FIG. 1 outputs a mild warning.
- FIG. 2 is a diagram illustrating another configuration example of the indoor unit illustrated in FIG. 1.
- 13 is a flowchart illustrating an operation procedure of the air-conditioning apparatus according to Modification 1.
- FIG. 13 is a diagram illustrating a configuration example of an air-conditioning apparatus according to Modification 2.
- FIG. 14 is a diagram illustrating a configuration example of a centralized controller connected to the air-conditioning apparatus illustrated in FIG. 13. It is a figure showing an example of 1 composition of an air conditioner concerning Embodiment 2 of the present invention.
- FIG. 16 is a diagram illustrating a configuration related to control performed by the air-conditioning apparatus illustrated in FIG. 15.
- FIG. 13 is a diagram illustrating a configuration example of a communication system including an air-conditioning apparatus according to Embodiment 3 of the present invention.
- FIG. 13 is a diagram illustrating a configuration example of an alarm device according to Embodiment 3 of the present invention.
- FIG. 18 is a diagram illustrating a configuration example of the mobile terminal illustrated in FIG. 17.
- FIG. 1 is a diagram illustrating a configuration example of the air-conditioning apparatus according to Embodiment 1 of the present invention.
- the air conditioner 1 has an outdoor unit 2 and an indoor unit 3.
- the outdoor unit 2 circulates a heat medium without phase change between the outdoor unit 2 and the indoor unit 3.
- the heat medium without phase change is, for example, water or brine.
- a case will be described in which one outdoor unit 2 is provided, but a plurality of outdoor units 2 may be provided. Further, in the first embodiment, a case will be described in which one indoor unit 3 is provided, but a plurality of indoor units 3 may be provided.
- the outdoor unit 2 includes a compressor 21 that compresses and discharges the refrigerant, a flow path switching device 22 that switches a flow direction of the refrigerant, a heat source side heat exchanger 23 that exchanges heat between the refrigerant and the outside air, a refrigerant and a heat medium.
- the outdoor unit 2 includes a heat source side blower 24 that supplies outside air to the heat source side heat exchanger 23, and a control device 20 that controls the operation of the air conditioner 1.
- the outdoor unit 2 is provided with a pump 27 for circulating a heat medium between the outdoor unit 2 and the indoor unit 3.
- the indoor unit 3 includes a load-side heat exchanger 31 that exchanges heat between the heat medium and the indoor air, a load-side blower 32 that sucks indoor air and supplies the heat to the load-side heat exchanger 31, and a flow rate of the heat medium. It has a flow control device 33 for adjusting and an alarm unit 30.
- the indoor unit 3 includes a room temperature sensor 34 that detects a room temperature Tr, which is a temperature of indoor air serving as a space to be air-conditioned, and a suction temperature sensor 39 that detects a suction temperature Tw, which is a temperature of air sucked into the indoor unit 3. Is provided.
- the indoor unit 3 is provided with a communication unit 38 that communicates with a remote controller (not shown).
- the heat medium pipe 61 of the indoor unit 3 is provided with a flow rate detection unit 35 for detecting the flow rate FL of the heat medium.
- the flow detector 35 is, for example, a flow meter.
- an inlet temperature sensor 36 for detecting the temperature Tin of the heat medium is provided on the heat medium inlet side of the load side heat exchanger 31.
- An outlet temperature sensor 37 for detecting the temperature Tout of the heat medium is provided on the heat medium outlet side of the load side heat exchanger 31.
- the compressor 21 is, for example, an inverter-type compressor whose capacity can be controlled.
- the flow path switching device 22 switches the flow path of the refrigerant according to an operation mode such as a heating operation or a cooling operation.
- the flow path switching device 22 is, for example, a four-way valve.
- the expansion device 25 is a device that can control the opening degree to an arbitrary size and can adjust the flow rate of the refrigerant.
- the expansion device 25 is, for example, an electronic expansion valve.
- the heat source side heat exchanger 23 and the load side heat exchanger 31 are, for example, fin and tube heat exchangers.
- the compressor 21, the heat source side heat exchanger 23, the expansion device 25, and the heat medium heat exchanger 26 are connected by the refrigerant pipe 11, and the refrigerant circuit 10 in which the refrigerant circulates is configured.
- the heat medium heat exchanger 26, the load-side heat exchanger 31, and the pump 27 are connected by a heat medium pipe 61 to form a heat medium circuit 60 in which the heat medium circulates.
- FIG. 2 is a diagram showing a configuration related to control performed by the air-conditioning apparatus shown in FIG.
- the control device 20 includes a memory 90 for storing a program, and a CPU (Central Processing Unit) 80 for executing the program.
- the control device 20 receives a detection value from the room temperature sensor 34.
- the control device 20 receives from the remote controller 70 via the communication unit 38 an instruction signal including the content input by the user operating the remote controller 70.
- the control device 20 controls the air conditioner 1 in accordance with the content of the alarm received from the alarm unit 30.
- the control device 20 includes a refrigeration cycle control unit 121 and a heat medium circuit control unit 122.
- the refrigeration cycle control means 121 controls the flow path switching device 22 according to the set operation mode.
- the refrigeration cycle control means 121 controls the refrigeration cycle of the refrigerant circulating in the refrigerant circuit 10 so that the detection value of the room temperature sensor 34 approaches the set temperature Ts.
- the refrigeration cycle control means 121 controls the operating frequency of the compressor 21 and the opening of the expansion device 25.
- the refrigeration cycle control unit 121 transmits a control signal including control contents such as the rotation speed of the pump 27 to the heat medium circuit control unit 122.
- the refrigeration cycle control means 121 adjusts the rotation speed of the pump 27 based on the temperature difference between the set temperature Ts and the room temperature Tr.
- the heat medium circuit control unit 122 controls the rotation speed of the pump 27, the operation frequency of the load-side blower 32, and the opening of the flow control device 33 based on the control signal received from the refrigeration cycle control unit 121.
- the set temperature Ts is set, for example, by a user using the indoor unit 3 operating the remote controller 70.
- the alarm unit 30 includes a memory 91 for storing a program, and a CPU 81 for executing the program.
- the memory 91 is a nonvolatile memory such as a flash memory.
- detected values are input to the alarm unit 30 from the inlet temperature sensor 36, the outlet temperature sensor 37, and the flow rate detector 35.
- the detection values of the room temperature sensor 34 and the suction temperature sensor 39 are input to the alarm unit 30.
- the value of the opening degree of the flow control device 33 is input to the alarm unit 30.
- the alarm unit 30 includes a calculation unit 131, a determination unit 132, and an abnormality alarm unit 133.
- the alarm unit 30 determines whether there is an abnormality in the indoor unit 3 based on, for example, the flow rate FL and the heat exchange amount difference Qd based on the flow rate FL.
- the calculating unit 131 obtains two thresholds as criteria for determining an abnormality of the indoor unit 3 based on the theoretical value of the flow rate based on the opening degree of the flow rate adjusting device 33. There are two types of alarms, severe and mild.
- the calculating means 131 obtains a first flow rate threshold value FLth1, which is a criterion for determining whether or not the flow rate FL has a slight abnormality, based on a theoretical value of the flow rate determined by the opening degree of the flow rate adjusting device 33.
- a second flow rate threshold value FLth2 serving as a criterion for determining whether or not there is an abnormality is determined.
- the second flow rate threshold FLth2 is a value smaller than the first flow rate threshold FLth1.
- the determining unit 132 determines whether or not the indoor unit 3 is abnormal based on the flow rate FL detected by the flow rate detecting unit 35.
- the determining unit 132 compares the flow rate FL with the first flow rate threshold value FLth1 and the second flow rate threshold value FLth2. When the flow rate FL is smaller than the second flow rate threshold value FLth2, the determination unit 132 determines that a serious abnormality has occurred in the indoor unit 3. This is because if the flow rate FL is smaller than the second flow rate threshold value FLth2, it is considered that a serious abnormality that causes the flow of the heat medium to stagnate has occurred in the indoor unit 3, the heat medium circuit 60, and the like.
- the determination unit 132 determines that the indoor unit 3 has a slight abnormality.
- the flow rate FL is equal to or larger than the second flow rate threshold value FLth2 but smaller than the first flow rate threshold value FLth1
- the flow of the heat medium is lower than the normal state, and a slight abnormality occurs in the indoor unit 3, the heat medium circuit 60, and the like. It is because it is thought that it is.
- the severe alarm is a highly urgent alarm that needs to stop the operation of the air conditioner 1 immediately.
- the mild alarm is a low urgency alarm that does not need to be stopped immediately, and is eliminated by performing maintenance.
- the flow rate FL as a cause corresponding to a severe abnormality, for example, a failure of the pump 27 and a damage of the heat medium pipe 61 can be considered.
- the heat medium is water
- the heat medium pipe 61 is damaged, water leakage will occur.
- the flow rate FL as a cause corresponding to the slight abnormality, for example, deposition of a substance contained in the heat medium in the pipe may be considered.
- the calculating means 131 obtains two thresholds based on the theoretical value of the flow rate from the opening degree of the flow rate adjusting device 33
- the calculating means 131 sets It is not necessary to calculate two thresholds.
- the memory 91 only needs to store the first flow rate threshold value FLth1 and the second flow rate threshold value FLth2 when the opening degree of the flow rate adjustment device 33 is a constant value.
- the judging means 132 judges whether or not the indoor unit 3 has an abnormality based on the refrigerating capacity exhibited by the load-side heat exchanger 31.
- the calculating means 131 calculates an air heat exchange amount Qr and a heat medium heat exchange amount Qw, and calculates a heat exchange amount difference Qd which is a difference between the air heat exchange amount Qr and the heat medium heat exchange amount Qw.
- the air heat exchange amount Qr is calculated by equation (1) based on the suction temperature Tw and the room temperature Tr.
- K in equation (1) is a coefficient determined by the shape and physical properties of the indoor unit 3 and the like.
- Qr K ⁇ (
- the heat medium heat exchange amount Qw is calculated by, for example, Expression (2), where Td is the temperature difference (
- ) between the temperature Tin and the temperature Tout. C in the equation (2) is a coefficient. Qw C ⁇ FL ⁇ Td (2)
- the calculation means 131 calculates the air heat exchange amount Qr according to the equation (1), and calculates the heat medium heat exchange amount Qw according to the equation (2). Then, the calculating means 131 calculates the absolute value of the difference between the air heat exchange amount Qr and the heat medium heat exchange amount Qw as the heat exchange amount difference Qd.
- the determination unit 132 compares the calculated heat exchange amount difference Qd with the first heat exchange threshold Qth1 and the second heat exchange threshold Qth2.
- the memory 91 stores a first heat exchange threshold value Qth1 and a second heat exchange threshold value Qth2, and the second heat exchange threshold value Qth2 is a value larger than the first heat exchange threshold value Qth1.
- the determining unit 132 determines that the indoor unit 3 has a serious abnormality. If the heat exchange amount difference Qd is larger than the second heat exchange threshold value Qth2, it is considered that a serious abnormality in which the heat medium cannot sufficiently exchange heat with the indoor air in the load side heat exchanger 31 has occurred. is there. When the heat exchange amount difference Qd is equal to or smaller than the second heat exchange threshold Qth2 and larger than the first heat exchange threshold Qth1, the determination unit 132 determines that a slight abnormality has occurred in the indoor unit 3.
- the heat exchange amount difference Qd is equal to or less than the second heat exchange threshold value Qth2, but is larger than the first heat exchange threshold value Qth1, the heat exchange efficiency in the load side heat exchanger 31 is lower than the normal state, and slight abnormality is detected in the room. This is because it is considered that it has occurred in the machine 3 and the heat medium circuit 60 and the like.
- the heat exchange amount difference Qd as a cause corresponding to a serious abnormality, for example, a failure of the load-side blower 32 and a severe deterioration of the load-side heat exchanger 31 can be considered.
- the severe deterioration of the load-side heat exchanger 31 means, for example, that it is better to replace the load-side heat exchanger 31 with a new one as soon as possible.
- the heat exchange amount difference Qd as a cause corresponding to the slight abnormality, for example, the room temperature Tr is too high compared to the refrigerating capacity of the indoor unit 3, the room temperature Tr is too low compared to the refrigerating capacity of the indoor unit 3, In addition, filter contamination of the indoor unit 3 and the like can be considered.
- the cause of the minor abnormality is not limited to these causes. For example, even if the load-side heat exchanger 31 has deteriorated, a mild deterioration in which deterioration has not progressed enough to replace the load-side heat exchanger 31 immediately corresponds to a slight abnormality.
- the abnormality alarm unit 133 When the determination unit 132 determines that the indoor unit 3 has an abnormality, the abnormality alarm unit 133 outputs an alarm to one or both of the remote controller 70 and the control device 20.
- the alarm output from the abnormality alarm unit 133 is a signal including information on the type of alarm. Specifically, when the determination unit 132 determines that the indoor unit 3 has a serious abnormality, the abnormality alarm unit 133 notifies one or both of the remote controller 70 and the control device 20 that the type of the alarm is severe. Outputs a severe alarm.
- the abnormality alarm unit 133 outputs a minor alarm to one or both of the remote controller 70 and the control device 20 indicating that the type of the alarm is minor. .
- the remote controller 70 and the control device 20 may be able to identify the type of alarm by a number.
- the identification number of the severe alarm is 1300
- the identification number of the mild alarm is 1500
- the identification number of the severe alarm is 1400
- the identification number of the mild alarm is 1600.
- FIG. 3 is a block diagram showing an example of a configuration of the remote controller shown in FIG.
- the remote controller 70 includes a communication unit 71, a display unit 72, an operation unit 73, and a control unit 74.
- the control unit 74 has a memory 75 for storing a program, and a CPU 76 for executing processing according to the program.
- the control unit 74 When receiving the alarm from the alarm unit 30 via the communication unit 71, the control unit 74 causes the display unit 72 to display that the alarm has been output. At that time, the control unit 74 may cause the display unit 72 to display the type of the alarm as well as the output of the alarm.
- the memory 75 may store a different identification number for each type of alarm and the type of alarm. For example, the memory 75 stores a mild alarm of the heat exchange amount difference Qd corresponding to the identification number 1600 of the alarm.
- the control unit 74 reads the identification number from the alarm received from the abnormality alarm unit 133 and causes the display unit 72 to display the type of alarm corresponding to the read identification number. If the display unit 72 displays a light alarm relating to the heat exchange amount difference Qd, the user can infer that an alarm has been output due to filter contamination.
- FIG. 4 is a diagram illustrating another configuration example of the flow rate detection unit illustrated in FIG. 1.
- the flow detecting unit 35 has pressure sensors 62 and 63 for detecting the pressure of the heat medium flowing through the heat medium pipe 61.
- the pressure sensor 62 is provided on the heat medium outlet side of the flow controller 33, and the pressure sensor 63 is provided on the heat medium inlet side of the flow controller 33.
- the calculating unit 131 may calculate the flow rate FL using the opening degree of the flow rate adjusting device 33 and the pressure difference between the detection value of the pressure sensor 62 and the detection value of the pressure sensor 63. Then, the determination unit 132 may determine whether or not the indoor unit 3 is abnormal using the flow rate FL calculated by the calculation unit 131.
- the configuration of the alarm unit 30 is not limited to the configuration shown in FIG.
- the alarm unit 30 may be a device configured with a logic circuit.
- FIG. 5 is a diagram showing another configuration example of the alarm unit shown in FIG.
- FIG. 5 is a configuration example when the alarm unit 30 determines whether or not the indoor unit 3 has an abnormality based on the flow rate FL.
- the flow rate FL is converted to a voltage Vin
- the first flow rate threshold FLth1 is converted to a first threshold voltage Vth1
- the second flow rate threshold FLth2 is converted to a second threshold voltage Vth2, which is input to the alarm unit 30.
- the alarm unit 30 includes comparators 151 and 152 and inverter circuits 141 and 142.
- the output terminal of the comparator 151 is connected to the input terminal of the inverter circuit 141.
- the output terminal of the comparator 152 is connected to the input terminal of the inverter circuit 142.
- the voltage Vin is input to the plus terminal of the comparator 151, and the first threshold voltage Vth1 is input to the minus terminal.
- the voltage Vin is input to the plus terminal of the comparator 152, and the second threshold voltage Vth2 is input to the minus terminal.
- the comparator 151 compares the voltage Vin with the first threshold voltage Vth1.
- the comparator 151 outputs an ON voltage higher than the reference voltage when the voltage Vin is equal to or higher than the first threshold voltage Vth1, and outputs an OFF voltage lower than the reference voltage when the voltage Vin is lower than the first threshold voltage Vth1.
- the inverter circuit 141 When an ON voltage is input from the comparator 151, the inverter circuit 141 outputs an OFF voltage as the voltage Vout1.
- the inverter circuit 141 outputs an ON voltage as the voltage Vout1.
- the comparator 152 compares the voltage Vin with the second threshold voltage Vth2.
- the comparator 152 outputs an ON voltage when the voltage Vin is equal to or higher than the second threshold voltage Vth2, and outputs an OFF voltage when the voltage Vin is lower than the second threshold voltage Vth2.
- the inverter circuit 142 outputs an OFF voltage as the voltage Vout2.
- the inverter circuit 142 outputs an ON voltage as the voltage Vout2.
- the indoor unit 3 may be provided with a light emitting unit (not shown), and the alarm unit 30 may turn on the light emitting unit to notify the user of the abnormality.
- a buzzer (not shown) may be provided in the indoor unit 3, and the alarm unit 30 may operate the buzzer to notify the user of the abnormality.
- the determination made by the determination unit 132 may be one of the determination based on the flow rate FL and the determination based on the heat exchange amount difference Qd, or may be both.
- FIG. 6 is a flowchart showing an operation procedure of the air-conditioning apparatus shown in FIG.
- the alarm unit 30 executes the procedure shown in FIG. 6 at regular intervals.
- the opening degree of the flow rate adjusting device 33 is constant will be described.
- the determining unit 132 acquires a detection value from the flow detection unit 35 (Step S101).
- the determination unit 132 compares the flow rate FL, which is the detection value of the flow rate detection unit 35, with the first flow rate threshold value FLth1 (step S102), and returns to step S101 if the flow rate FL is equal to or greater than the first flow rate threshold value FLth1. If the result of the determination in step S102 indicates that the flow rate FL is smaller than the first flow rate threshold value FLth1, the determination unit 132 compares the flow rate FL with the second flow rate threshold value FLth2 (step S103).
- step S103 If the result of the determination in step S103 indicates that the flow rate FL is equal to or greater than the second flow rate threshold value FLth2, the abnormality alarm means 133 outputs a mild alarm to the control device 20 and the remote controller 70 of the outdoor unit 2 (step S104). On the other hand, if the result of the determination in step S103 indicates that the flow rate FL is smaller than the second flow rate threshold value FLth2, the abnormality warning unit 133 outputs a severe warning to the control device 20 and the remote controller 70 of the outdoor unit 2 (step S105).
- step S104 upon receiving the alarm from the alarm unit 30, the remote controller 70 displays on the display unit 72 that the mild alarm has been output.
- the control device 20 reduces the rotation speed of the pump 27.
- step S105 when the alarm received from the alarm unit 30 is a severe alarm, the control device 20 stops the operation of the pump 27.
- the remote controller 70 displays on the display unit 72 that the severe alarm has been output.
- FIG. 7 is a flowchart showing another operation procedure of the air conditioner shown in FIG.
- the alarm unit 30 executes the procedure shown in FIG. 7 at regular intervals.
- the calculating means 131 acquires detection values from the suction temperature sensor 39 and the room temperature sensor 34, and calculates the air heat exchange amount Qr using these detection values. Further, the calculating means 131 acquires the detected values from the inlet temperature sensor 36 and the outlet temperature sensor 37, acquires the detected values from the flow rate detector 35, and uses these detected values to obtain the heat medium heat exchange amount Qw. Is calculated (step S201). Then, the calculating means 131 calculates a heat exchange amount difference Qd, which is a difference between the air heat exchange amount Qr and the heat medium heat exchange amount Qw (step S202).
- the determination means 132 compares the heat exchange amount difference Qd with the first heat exchange threshold value Qth1 (step S203), and returns to step S201 when the heat exchange amount difference Qd is equal to or smaller than the first heat exchange threshold value Qth1. As a result of the determination in step S203, when the heat exchange amount difference Qd is larger than the first heat exchange threshold value Qth1, the determination unit 132 compares the heat exchange amount difference Qd with the second heat exchange threshold value Qth2 (step S204).
- step S204 when the heat exchange amount difference Qd is equal to or smaller than the second heat exchange threshold value Qth2, the abnormality alarm unit 133 outputs a mild alarm to the control device 20 and the remote controller 70 of the outdoor unit 2 (step S205). ).
- the abnormality alarm means 133 outputs a severe alarm to the control device 20 and the remote controller 70 of the outdoor unit 2 (step S204). S206).
- step S205 upon receiving the alarm from the alarm unit 30, the remote controller 70 displays on the display unit 72 that the mild alarm has been output.
- the control device 20 reduces the rotation speed of the pump 27.
- step S206 when the alarm received from the alarm unit 30 is a severe alarm, the control device 20 stops the operation of the pump 27.
- the remote controller 70 displays on the display unit 72 that the severe alarm has been output.
- FIG. 8 is a graph showing an example of a time-series change of the heat medium heat exchange amount in the load-side heat exchanger shown in FIG.
- the vertical axis of the graph in FIG. 8 is the heat exchange amount Q
- the horizontal axis is time t.
- Qw0 is a target value of the heat medium heat exchange amount Qw.
- Qw1 is the first heat exchange amount when the indoor unit 3 is determined to be mildly abnormal
- Qw2 is the second heat exchange amount when the indoor unit 3 is determined to be severely abnormal.
- the heat medium heat exchange amount Qw calculated by the equation (2) is calculated from the value near the target value Qw0, as shown in FIG. It decreases with time, and reaches the first heat exchange amount Qw1 at time t1. Even if the heat medium heat exchange amount Qw decreases to the first heat exchange amount Qw1, no warning is notified to the user. Even if the heat medium heat exchange amount Qw decreases to the first heat exchange amount Qw1, the alarm is not notified to the user, and the air conditioner continues to operate. Since the air conditioner continues to operate in a state where the heat exchange efficiency is poor, power is wasted.
- the alarm unit 30 outputs the light alarm or the heavy alarm, and the indoor unit 3 No anomalies are left. Therefore, for example, it is possible to prevent the heat medium from leaking into the room due to damage to the heat medium pipe 61. Further, it is possible to prevent the indoor unit 3 from suddenly becoming unable to operate due to the failure of the pump 27.
- FIG. 9 is a graph illustrating another example of a time-series change of the heat medium heat exchange amount in the load-side heat exchanger illustrated in FIG. 1. It is known that the refrigeration capacity of the load-side heat exchanger 31 deteriorates according to the years of use.
- the vertical and horizontal axes of the graph shown in FIG. 9 are the same as in FIG. 8, but the time t shown on the horizontal axis of FIG. 9 is the number of years.
- the target value Qw0, the first heat exchange amount Qw1, and the second heat exchange amount Qw2 are set in consideration of the aging of the load-side heat exchanger 31.
- the heat medium heat exchange amount Qw decreases with time from a value near the target value Qw0, and reaches the first heat exchange amount Qw1 at time t3. Thereafter, even if the time t elapses and the heat medium heat exchange amount Qw decreases to the second heat exchange amount Qw2 at the time t4, no warning is given to the user, and the air conditioner continues to operate.
- the air conditioner continues to operate in a state where the heat exchange efficiency is poor, so that power is wasted. For example, when the heat medium pipe has a crack, the heat medium may leak into the room when the air conditioner continues to operate.
- FIG. 10 is a graph showing an example of a time-series change of the heat medium heat exchange amount when the filter is cleaned every time the alarm unit shown in FIG. 1 outputs a mild alarm.
- the calculating means 131 determines the first heat exchange threshold value Qth1 and the second heat exchange threshold value Qth2 based on the aging of the load side heat exchanger 31, and stores them in the memory 91.
- the calculating unit 131 calculates the first heat exchange threshold value Qth1 and the second heat exchange threshold value Qth2 based on the aging of the load side heat exchanger 31 at regular intervals from the time of installation of the load side heat exchanger 31. The two thresholds are obtained, and the threshold stored in the memory 91 is updated.
- the heat medium heat exchange amount Qw decreases with time from a value near the target value Qw0, and reaches the first heat exchange amount Qw1 at time t5.
- the alarm unit 30 outputs a mild alarm to the remote controller 70.
- the remote controller 70 displays on the display 72 that the mild alarm has been output.
- the user looks at the display content on the display unit 72, determines that the cause of the mild alarm is filter clogging, and cleans the filter.
- the heat medium heat exchange amount Qw returns to near the target value Qw0 as shown in FIG.
- the alarm unit 30 outputs a mild alarm to the remote controller 70.
- the user confirms that the mild alarm is output on the display unit 72 of the remote controller 70, the user cleans the filter.
- the heat medium heat exchange amount Qw returns to near the target value Qw0.
- an alarm is notified to the user every time the heat medium heat exchange amount Qw decreases to the first heat exchange amount Qw1. If the user cleans the filter each time he or she receives the notification of the mild alarm, as shown in FIG. 10, the air-conditioning apparatus 1 can continue operating with better heat exchange efficiency. Further, the first heat exchange threshold value Qth1 and the second heat exchange threshold value Qth2 are updated as the load side heat exchanger 31 deteriorates over time. 8 and 9, it can be seen that the first heat exchange threshold value Qth1, which takes into account the aging of the load side heat exchanger 31, decreases with time. The heat medium heat exchange amount Qw reaches the first heat exchange amount Qw1 shown in FIG.
- the air-conditioning apparatus 1 includes an outdoor unit 2 including a refrigerant circuit 10 in which refrigerant circulates, and a load-side heat exchanger 31 in which a heat medium that has exchanged heat with the refrigerant exchanges heat with indoor air. It has a unit 3 and a flow detection unit 35 and an alarm unit 30 provided in the indoor unit 3.
- the alarm unit 30 determines whether the indoor unit 3 has an abnormality based on the flow rate FL of the heat medium detected by the flow detection unit 35, and outputs an alarm when the indoor unit 3 has an abnormality.
- Abnormality warning means 133 which performs the operation.
- the alarm unit 30 that determines whether there is an abnormality in the indoor unit 3 based on the flow rate of the heat medium is provided, and when the alarm unit 30 determines that the indoor unit 3 has an abnormality, Output an alarm. If the alarm unit 30 outputs an alarm to the remote controller 70, the user can know that an abnormality has occurred in the indoor unit 3 by looking at the display on the remote controller 70. The user confirms that there is no mistake in the usage of the air-conditioning apparatus 1 in response to the notification of the alarm. For example, the user checks whether the set temperature Ts is too high or too low. Further, the user checks whether there is any abnormality in the indoor unit 3 and, if the cause of the abnormality is not known, contacts the maintenance company. As a result, if the user or the maintenance company finds the cause of the abnormality, the abnormality can be dealt with and the air conditioner 1 can be prevented from continuing to operate in a state where the indoor unit 3 has an abnormality.
- the control device 20 may reduce the rotation speed of the pump 27 upon receiving the alarm. For example, when the abnormality that has occurred in the indoor unit 3 is damage to the heat medium pipe 61, the control device 20 may stop the operation of the pump 27 in response to receiving an alarm. By stopping the operation of the pump 27, it is possible to prevent a large amount of the heat medium from leaking.
- the determination unit 132 uses the first flow rate threshold FLth1 and the second flow rate threshold FLth2 as determination criteria, and determines the degree of the abnormality. You may determine whether it is severe or mild. When the severe alarm is output, the user can predict, for example, the failure of the pump 27 and the damage of the heat medium pipe 61 as the cause of the abnormality. When the mild alarm is output, the user can predict that the accumulation of the substance contained in the heat medium in the heat medium pipe 61 is the cause of the abnormality.
- the calculation means 131 may calculate two threshold values, the first flow threshold value FLth1 and the second flow threshold value FLth2, from the theoretical value of the flow rate determined by the opening of the flow rate adjusting device 33.
- the two thresholds are set to appropriate values according to the opening degree of the flow control device 33.
- the determination unit 132 may determine whether there is an abnormality based on the heat exchange amount difference Qd, which is the difference between the heat medium heat exchange amount Qw and the air heat exchange amount Qr. In this case, it can be determined whether or not the heat exchange in the load side heat exchanger 31 is abnormal. Further, the determination means 132 may determine whether the degree of the abnormality is severe or mild using the first heat exchange threshold Qth1 and the second heat exchange threshold Qth2 as a determination criterion. When the severe alarm is output, the user can predict that the abnormality is caused by, for example, a failure of the load-side blower 32 and a severe deterioration of the load-side heat exchanger 31.
- the user may find that the room temperature Tr is too high or too low compared to the refrigerating capacity of the indoor unit 3, the filter of the indoor unit 3 is dirty, and the load side heat exchanger 31 has a slight deterioration.
- the cause can be predicted.
- the calculating unit 131 may calculate the first heat exchange threshold Qth1 and the second heat exchange threshold Qth2 based on the aging of the load side heat exchanger 31. In this case, it is possible to suppress the erroneous determination that is determined to be a slight abnormality before the heat exchange amount difference Qd reaches the first heat exchange threshold value Qth1 considering the aging of the load side heat exchanger 31.
- the control device 20 may be provided in the indoor unit 3 or may be provided in a place different from the outdoor unit 2 and the indoor unit 3.
- FIG. 11 is a diagram illustrating another configuration example of the indoor unit illustrated in FIG. 1.
- the indoor unit 3 illustrated in FIG. 11 is different from the configuration illustrated in FIG. 1 in that a suction flow sensor 64 that detects a suction flow AF of the air sucked into the indoor unit 3 is added.
- the determination unit 132 compares the suction flow rate AF with the air flow rate threshold AFth to distinguish the cause of the minor abnormality.
- the suction flow rate AF is equal to or less than the air flow rate threshold AFth
- the determination unit 132 determines that the filter is clogged because the air suction flow rate AF is insufficient.
- the determination means 132 determines that the cause is slight deterioration of the load-side heat exchanger 31 because the air suction flow rate AF is sufficient.
- FIG. 12 is a flowchart showing an operation procedure of the air conditioner of the first modification.
- the points different from the operation illustrated in FIG. 7 will be described in detail, and the description of the same operation as the operation illustrated in FIG. 17 will be omitted.
- step S204 when determining that there is a slight abnormality, the determination unit 132 compares the suction flow rate AF with the air flow rate threshold AFth (step S211). When the suction flow rate AF is equal to or smaller than the air flow rate threshold AFth, the determination unit 132 determines that the cause is filter clogging (step S212). The abnormality alarming unit 133 outputs a mild alarm including information on filter clogging as a cause of the abnormality (step S213).
- step S211 determines that the suction flow rate AF is larger than the air flow rate threshold AFth.
- the determination means 132 determines that the cause is slight deterioration of the load-side heat exchanger 31 (step S214).
- the abnormality alarm means 133 outputs a minor alarm including information on minor deterioration of the load-side heat exchanger 31 as a cause of the abnormality (step S215).
- the remote controller 70 displays on the display unit 72 that the mild alarm has been output and information on the cause of the abnormality. As a result, the user can distinguish the cause of the mild alarm from whether the filter is clogged or the load side heat exchanger 31 has deteriorated.
- Modification Example 2 is a case where the air-conditioning apparatus 1 illustrated in FIG. 1 includes a plurality of indoor units 3.
- FIG. 13 is a diagram illustrating a configuration example of an air-conditioning apparatus according to Modification 2.
- the air conditioner 1a has a plurality of indoor units 3a to 3c. A different device identifier is assigned to each of the indoor units 3a to 3c. Since the indoor units 3a to 3c have the same configuration as the indoor unit 3 shown in FIG. 1, detailed descriptions thereof will be omitted.
- the load side heat exchangers 31a to 31c have the same configuration as the load side heat exchanger 31.
- the load-side blowers 32a to 32c have the same configuration as the load-side blower 32.
- the flow rate adjusting devices 33a to 33c have the same configuration as the flow rate adjusting device 33.
- the room temperature sensors 34a to 34c have the same configuration as the room temperature sensor 34.
- the suction temperature sensors 39a to 39c have the same configuration as the suction temperature sensor 39.
- the communication units 38a to 38c have the same configuration as the communication unit 38.
- the flow rate detectors 35a to 35c have the same configuration as the flow rate detector 35.
- the inlet temperature sensors 36a to 36c have the same configuration as the inlet temperature sensor 36.
- the outlet temperature sensors 37a to 37c have the same configuration as the outlet temperature sensor 37.
- the alarm units 30a to 30c have the same configuration as the alarm unit 30.
- Each memory 91 of the alarm units 30a to 30c stores its own device identifier.
- Each of the abnormality alarm means 133 of the alarm units 30a to 30c outputs an alarm including its own device identifier.
- the alarm unit of the indoor unit in which the abnormality has occurred outputs an alarm.
- the user of each of the indoor units 3a to 3c can check the type of the abnormality with the remote controller 70 when an abnormality occurs in the indoor unit in his room.
- control device 20 reduces the rotation speed of pump 27.
- control device 20 stops operation of pump 27.
- FIG. 14 is a diagram illustrating a configuration example of a centralized controller connected to the air-conditioning apparatus illustrated in FIG.
- the centralized controller 50 includes a communication unit 51, a display unit 52, an operation unit 53, and a control unit 54.
- the control unit 54 has a memory 55 that stores a program, and a CPU 56 that executes processing according to the program.
- the memory 55 stores information on the indoor units 3a to 3c corresponding to a plurality of device identifiers.
- the information on the indoor units 3a to 3c is, for example, information on a room in which the indoor units are installed and a user of the indoor units.
- the manager of the building can operate the operation unit 53 of the centralized controller 50 to set the set temperatures Tsa to Tsc of a plurality of rooms corresponding to the plurality of indoor units 3a to 3c. Further, the administrator can operate the operation unit 53 of the centralized controller 50 to display the room temperature Tr of a plurality of rooms corresponding to the plurality of indoor units 3a to 3c on the display unit 52.
- the control unit 54 when receiving an alarm from any of the plurality of indoor units 3a to 3c, the control unit 54 displays the indoor unit that has output the alarm and the fact that the alarm has been output on the display unit 52.
- the building manager can identify the indoor unit in which the abnormality has occurred by checking the content displayed on the display unit 52.
- a plurality of air conditioners 1a may be provided in a building.
- the centralized controller 50 may be connected to each control device 20 of the plurality of air conditioners 1a, and collectively manage the indoor units 3a to 3c of each air conditioner 1a of the plurality of air conditioners 1a.
- the number of the indoor units 3 included in the air conditioner 1a is three has been described, but the number of the indoor units 3 is not limited to three.
- Embodiment 2 FIG.
- the air-conditioning apparatus according to Embodiment 2 has a repeater between the outdoor unit and the indoor unit.
- a detailed description of the same configuration as that described in the first embodiment will be omitted.
- FIG. 15 is a diagram showing a configuration example of an air conditioner according to Embodiment 2 of the present invention.
- the air conditioner 1b has an outdoor unit 2, an indoor unit 3, and a relay unit 4 provided between the outdoor unit 2 and the indoor unit 3.
- Repeater 4 has heat medium heat exchanger 26 and pump 27 provided in outdoor unit 2 of air conditioner 1 of the first embodiment.
- the repeater 4 has a control unit 40 that controls the pump 27.
- the refrigerant circulates between the outdoor unit 2 and the relay unit 4 via the refrigerant circuit 10.
- the heat medium circulates between the relay unit 4 and the indoor unit 3 via the heat medium circuit 60.
- FIG. 16 is a diagram showing a configuration related to control performed by the air-conditioning apparatus shown in FIG.
- the control unit 40 has a memory 92 that stores a program, and a CPU 82 that executes processing according to the program.
- the abnormality warning means 133 of the warning unit 30 outputs a warning to one or both of the control unit 40 and the remote controller 70 of the repeater. Also in the second embodiment, the abnormality alarm unit 133 may output an alarm to the control device 20 of the outdoor unit 2.
- the control unit 40 reduces the rotation speed of the pump 27.
- the control unit 40 stops the operation of the pump 27 when the warning received from the warning unit 30 is a severe warning.
- the alarm unit 30 issues an alarm to the relay device 4.
- the rotation speed of the pump 27 decreases. Therefore, for example, when the heat medium pipe 61 is damaged, it is possible to prevent a large amount of the heat medium from leaking into the room by keeping the heat medium flowing through the heat medium pipe 61.
- Embodiment 3 FIG.
- the air conditioner 1 shown in FIG. 1 notifies a portable terminal carried by a user of an alarm.
- a detailed description of the same configuration as that described in the first and second embodiments will be omitted.
- the air conditioner 1 shown in FIG. 1 will be described as a base, but the third embodiment will be described with reference to the air conditioners described in Modification 1, Modification 2, and Embodiment 2. May be applied.
- FIG. 17 is a diagram showing a configuration example of a communication system including the air-conditioning apparatus according to Embodiment 3 of the present invention.
- the alarm unit 30 is connected to the mobile terminal 110 via the network 100.
- the network 100 is, for example, the Internet.
- the mobile terminal 110 is carried by, for example, a user of the indoor unit 3, but the person who carries the mobile terminal 110 is not limited to the user.
- the person who carries the portable terminal 110 may be an administrator of the air conditioner 1 or a maintenance company of the air conditioner 1.
- FIG. 18 is a diagram showing a configuration example of an alarm device according to Embodiment 3 of the present invention.
- a communication unit 134 for connecting to the network 100 is added to the alarm unit 30 shown in FIG. 18 as compared with the configuration shown in FIG.
- the communication unit 134 communicates with the mobile terminal 110 using a determined communication protocol.
- the communication protocol is, for example, TCP (Transmission Control Protocol) / IP (Internet Protocol).
- FIG. 19 is a diagram illustrating a configuration example of the mobile terminal illustrated in FIG.
- the mobile terminal 110 is an information processing device such as a smartphone and a PDA (Personal Digital Assistant). As shown in FIG. 19, the mobile terminal 110 includes a communication unit 111, a display unit 112, an operation unit 113, and a control unit 114.
- the display unit 112 is, for example, a liquid crystal display.
- the operation unit 113 is, for example, a touch panel.
- the control unit 114 has a memory 115 for storing a program, and a CPU 116 for executing processing according to the program.
- the memory 115 is, for example, a nonvolatile memory such as a flash memory.
- the memory 115 stores an identification number that differs for each type of alarm output by the alarm unit 30 and an alarm type in association with each other. For example, the memory 115 stores a severe alarm of the heat exchange amount difference Qd corresponding to the identification number 1400 of the alarm.
- the control unit 114 reads the identification number from the alarm received from the abnormality alarm unit 133 and causes the display unit 112 to display the type of alarm corresponding to the read identification number. If a severe alarm relating to the heat exchange amount difference Qd is displayed on the display unit 112, the user can infer that an alarm has been output due to a failure of the load-side blower 32 or a severe deterioration of the load-side heat exchanger 31.
- the abnormality alarm unit 133 When the determination unit 132 of the alarm unit 30 determines that the indoor unit 3 has an abnormality, the abnormality alarm unit 133 outputs an alarm to the control device 20 and the remote controller 70. Further, the abnormality alarm unit 133 outputs an alarm to the portable terminal 110 via the communication unit 134 and the network 100. When the communication unit 111 receives an alarm from the communication unit 134 via the network 100, the communication unit 111 passes the received alarm to the control unit 114. When receiving the alarm from the communication unit 111, the control unit 114 causes the display unit 112 to display that the indoor unit 3 has output the alarm and the type of the alarm.
- the alarm unit 30 when an abnormality occurs in the indoor unit 3, the alarm unit 30 outputs an alarm to the mobile terminal 110, so that the mobile terminal 110 notifies the user that the indoor unit 3 has output the alarm. I do. Therefore, even if the user goes out during the operation of the indoor unit 3, the user can know from the display of the portable terminal 110 that the abnormality has occurred in the indoor unit 3 at the place where he / she goes.
- the portable terminal 110 notifies the user of the severe alarm, the user can quickly contact the maintenance company even when the user is out.
- the maintenance contractor carries the portable terminal 110, an alarm is automatically notified to the maintenance contractor when an abnormality occurs in the air conditioner 1.
- the user does not need to notify the maintenance contractor that the abnormality has occurred in the indoor unit 3. If the type of alarm notified by the mobile terminal 110 is a severe alarm, the maintenance company can quickly prepare for dealing with an abnormality that has occurred in the indoor unit 3 without a notification from the user.
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Abstract
Description
本実施の形態1の空気調和装置の構成を説明する。図1は、本発明の実施の形態1に係る空気調和装置の一構成例を示す図である。空気調和装置1は、室外機2と、室内機3とを有する。室外機2は、相変化を伴わない熱媒体を室内機3との間で循環させる。相変化を伴わない熱媒体は、例えば、水またはブラインなどである。本実施の形態1では、室外機2が1台の場合で説明するが、室外機2は複数であってもよい。また、本実施の形態1では、室内機3が1台の場合で説明するが、室内機3は複数であってもよい。
Qr=K×(|Tw-Tr|)・・・(1)
Qw=C×FL×Td・・・(2)
本変形例1は、実施の形態1において、判定手段132が、軽度の警報の原因を区別する動作を追加したものである。図11は、図1に示した室内機の別の構成例を示す図である。図11に示す室内機3には、図1に示した構成と比較すると、室内機3に吸い込まれる空気の吸込流量AFを検出する吸込流量センサ64が追加されている。
本変形例2は、図1に示した空気調和装置1が複数の室内機3を有する構成の場合である。図13は、変形例2の空気調和装置の一構成例を示す図である。空気調和装置1aは、複数の室内機3a~3cを有する。室内機3a~3cには、室内機毎に異なる装置識別子が割り当てられている。室内機3a~3cは図1に示した室内機3と同一の構成であるため、その詳細な説明を省略する。
本実施の形態2の空気調和装置は、室外機と室内機との間に中継機を有するものである。本実施の形態2では、実施の形態1で説明した構成と同一の構成についての詳細な説明を省略する。
本実施の形態3は、図1に示した空気調和装置1が、ユーザが携帯する携帯端末に警報を通知するものである。本実施の形態3では、実施の形態1および2で説明した構成と同一の構成についての詳細な説明を省略する。また、本実施の形態3では、図1に示した空気調和装置1をベースに説明するが、本実施の形態3を、変形例1、変形例2および実施の形態2で説明した空気調和装置に適用してもよい。
Claims (11)
- 冷媒回路に冷媒を圧縮して吐出する圧縮機を含む室外機と、
前記冷媒と熱交換した熱媒体が空調対象空間の空気と熱交換する負荷側熱交換器を含む室内機と、
前記熱媒体の流量を検出する流量検出部と、
前記室内機に設けられた警報部と、を有し、
前記警報部は、
前記流量検出部が検出した前記流量に基づいて前記室内機に異常があるか否かを判定する判定手段と、
前記判定手段が前記室内機に異常があると判定すると、警報を出力する異常警報手段と、
を有する、空気調和装置。 - 前記判定手段は、
第1流量閾値および前記第1流量閾値よりも小さい第2流量閾値の各閾値と前記流量とを比較し、前記流量が前記第1流量閾値よりも小さい場合に前記異常があると判定し、
前記異常警報手段は、
前記流量が前記第2流量閾値以上、かつ前記第1流量閾値より小さい場合に前記警報として軽度警報を出力し、前記流量が前記第2流量閾値より小さい場合に前記警報として重度警報を出力する、請求項1に記載の空気調和装置。 - 前記熱媒体の流量を調整する流量調整装置を有し、
前記警報部は、
前記流量調整装置の開度で決まる流量の理論値に基づいて、前記第1流量閾値および前記第2流量閾値を求める算出手段を有する、請求項2に記載の空気調和装置。 - 前記負荷側熱交換器の入口側の前記熱媒体の温度を検出する入口温度センサと、
前記負荷側熱交換器の出口側の前記熱媒体の温度を検出する出口温度センサと、
前記空調対象空間の温度を検出する室温センサと、
前記室内機に吸い込まれる空気の吸込温度を検出する吸込温度センサと、
を有し、
前記警報部は、
前記入口温度センサの検出値および前記出口温度センサの検出値の温度差と前記流量とに基づいて熱媒体熱交換量を算出し、前記室温センサの検出値および前記吸込温度センサの検出値に基づいて空気熱交換量を算出し、前記熱媒体熱交換量と前記空気熱交換量との差である熱交換量差を算出する算出手段を有し、
前記判定手段は、
第1熱交換閾値および前記第1熱交換閾値よりも大きい第2熱交換閾値の各閾値と前記熱交換量差とを比較し、前記熱交換量差が前記第1熱交換閾値よりも大きい場合に前記異常と判定し、
前記異常警報手段は、
前記熱交換量差が前記第2熱交換閾値以下、かつ前記第1熱交換閾値より大きい場合に前記警報として軽度警報を出力し、前記熱交換量差が前記第2熱交換閾値より大きい場合に前記警報として重度警報を出力する、請求項1に記載の空気調和装置。 - 前記算出手段は、前記負荷側熱交換器の経年劣化に基づいて前記第1熱交換閾値および前記第2熱交換閾値を求める、請求項4に記載の空気調和装置。
- 前記負荷側熱交換器と熱媒体配管で接続され、前記熱媒体と前記冷媒とが熱交換する熱媒体熱交換器と、前記熱媒体配管に前記熱媒体を循環させるポンプとが、前記室外機に設けられ、
前記異常警報手段は前記警報を前記室外機に出力し、
前記室外機は、前記異常警報手段から前記警報を受け取ると、前記ポンプの回転数を小さくする、請求項1~5のいずれか1項に記載の空気調和装置。 - 前記負荷側熱交換器と熱媒体配管で接続され、前記熱媒体と前記冷媒とが熱交換する熱媒体熱交換器と、前記熱媒体配管に前記熱媒体を循環させるポンプとを含む中継機を有し、
前記異常警報手段は、前記警報を前記中継機に出力し、
前記中継機は、前記異常警報手段から前記警報を受け取ると、前記ポンプの回転数を小さくする、請求項1~5のいずれか1項に記載の空気調和装置。 - 複数の前記室内機を有し、
前記各判定手段は、前記室内機に前記異常があるか否かを判定し、
前記各異常警報手段は、前記判定手段が前記室内機に異常があると判定した場合、前記警報を出力する、請求項1~7のいずれか1項に記載の空気調和装置。 - 前記複数の室内機の前記各警報部と接続される集中コントローラを有し、
前記各異常警報手段は、前記判定手段が前記室内機に異常があると判定した場合、前記警報を前記集中コントローラに出力する、請求項8に記載の空気調和装置。 - リモートコントローラと通信する通信部が前記室内機に設けられ、
前記異常警報手段は、前記通信部を介して、前記リモートコントローラに前記警報を出力する、請求項1~9のいずれか1項に記載の空気調和装置。 - 前記警報部は、ネットワークと接続する通信手段を有し、
前記異常警報手段は、前記通信手段を介して、前記ネットワークに接続される携帯端末に前記警報を出力する、請求項1~10のいずれか1項に記載の空気調和装置。
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|---|---|---|---|
| GB2103447.5A GB2590862B (en) | 2018-09-21 | 2018-09-21 | Air-conditioning apparatus |
| US17/260,307 US11802701B2 (en) | 2018-09-21 | 2018-09-21 | Air-conditioning apparatus |
| PCT/JP2018/034974 WO2020059105A1 (ja) | 2018-09-21 | 2018-09-21 | 空気調和装置 |
| JP2020547567A JP7003285B2 (ja) | 2018-09-21 | 2018-09-21 | 空気調和装置 |
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| US (1) | US11802701B2 (ja) |
| JP (1) | JP7003285B2 (ja) |
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| DE112018008154T5 (de) * | 2018-11-20 | 2021-08-26 | Mitsubishi Electric Corporation | Klimagerät |
| CN114543406A (zh) * | 2022-02-11 | 2022-05-27 | 深圳市深蓝电子股份有限公司 | 基于物联网的空气源热泵预警系统、方法及空气源热泵 |
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- 2018-09-21 US US17/260,307 patent/US11802701B2/en active Active
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| Publication number | Publication date |
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| JP7003285B2 (ja) | 2022-02-04 |
| JPWO2020059105A1 (ja) | 2021-05-13 |
| GB2590862A (en) | 2021-07-07 |
| US11802701B2 (en) | 2023-10-31 |
| GB202103447D0 (en) | 2021-04-28 |
| GB2590862B (en) | 2022-05-18 |
| US20210285673A1 (en) | 2021-09-16 |
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