WO2016016913A1 - 空気調和装置 - Google Patents
空気調和装置 Download PDFInfo
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- WO2016016913A1 WO2016016913A1 PCT/JP2014/004005 JP2014004005W WO2016016913A1 WO 2016016913 A1 WO2016016913 A1 WO 2016016913A1 JP 2014004005 W JP2014004005 W JP 2014004005W WO 2016016913 A1 WO2016016913 A1 WO 2016016913A1
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- thermo
- compressor
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- temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
-
- 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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
-
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
Definitions
- the present invention relates to an air conditioner that performs so-called thermo-on and thermo-off.
- a stop command unit that stops a compressor when the temperature of blown air from an indoor unit becomes lower than a predetermined value
- a stop command unit include a compressor A storage means for storing the temperature of the intake air when the engine is stopped, and a start command means for starting the compressor when the temperature of the intake air rises by a predetermined value from the stored temperature. It has been proposed (see, for example, Patent Document 1).
- the air conditioner described in Patent Document 1 mainly controls the blown air temperature and has the content of starting the compressor (thermo-on) by increasing the temperature of the intake air, but does not suggest any other means.
- the air conditioning apparatus described in Patent Document 1 stores the temperature of the intake air when the compressor is stopped in the case where the blown air is controlled.
- the temperature rises by more than a predetermined value above the stored suction temperature it is performed by the start command means, so that the temperature in the duct is not confused and the necessary temperature controllability for the air conditioning load is not sacrificed.
- the number of compressor start / stop times is minimized.
- the intake air temperature will not increase. The compressor did not start for a long time, and there was a problem that air having a temperature higher than the set blowing air temperature was continuously blown out.
- the present invention has been made to solve the above-described problems, and is a case where the actual air conditioning load state is low or the waste heat of the heat generating equipment in the air-conditioned room does not return to the indoor unit.
- Another object of the present invention is to obtain an air conditioner that prevents the compressor from starting for a long time and can suppress the number of times the compressor starts and stops.
- An air conditioner includes a refrigerant circuit formed by sequentially connecting a compressor, a heat source side heat exchanger, an expansion valve, and a use side heat exchanger in an annular manner, and an indoor unit provided with the use side heat exchanger.
- a blowout temperature sensor that detects the blowout temperature of the air that passes through the use-side heat exchanger and blows into the air-conditioned room, and the blowout temperature detected by the blowout temperature sensor is brought close to the preset temperature.
- a compressor control means for controlling the thermo-on for driving the compressor or the thermo-off for stopping the compressor, and depending on the air-conditioning operation state immediately before the thermo-off or during the thermo-off, the time for prohibiting the next thermo-on is provided. It is characterized by setting.
- thermo-conditioning operation state immediately before the thermo-off or during the thermo-off includes, for example, a continuous thermo-on time immediately before the thermo-off, the number of start / stop times of the compressor that occurred within the predetermined time, and the blowing temperature within the predetermined time immediately before the thermo-off Examples thereof include a rate of decrease and a rate of increase in suction temperature within a predetermined time during the thermo-off.
- the air conditioner according to the present invention performs a thermo-on for driving the compressor or a thermo-off for stopping the compressor so that the blow-out temperature of the indoor unit approaches a preset temperature set in advance.
- the time when the next thermo-on is prohibited is set according to the air conditioning operation status of the air conditioner, so when the actual air conditioning load status is low or when the waste heat of the heat generating equipment does not return to the air conditioner. This also has the effect of preventing the compressor from starting for a long time and suppressing the number of start / stop times of the compressor.
- FIG. 1 is a schematic configuration diagram of an air-conditioning apparatus according to Embodiment 1 of the present invention.
- an air conditioner 100 according to this embodiment includes an indoor unit 1, an outdoor unit 2, and a refrigerant distribution connection pipe 3 that connects the indoor unit 1 and the outdoor unit 2.
- the compressor 21 and the heat source side heat exchanger 22 of the outdoor unit 2, the connection pipe 3, the expansion valve 15 and the use side heat exchanger 12 of the indoor unit 1, and the connection pipe 3 are sequentially piped in a ring shape.
- the refrigerant circuit 200 that performs the refrigeration cycle operation is configured.
- the indoor unit 1 is mounted with an expansion valve 15 and a use side heat exchanger 12 connected in series by piping.
- the expansion valve 15 expands the refrigerant under reduced pressure, and is preferably composed of an electronic expansion valve whose valve opening can be variably controlled.
- the use side heat exchanger 12 functions as an evaporator during cooling operation and functions as a condenser during heating.
- indoor air blowing means 13 for supplying air to the use side heat exchanger 12 is provided in the vicinity of the use side heat exchanger 12, indoor air blowing means 13 for supplying air to the use side heat exchanger 12 is provided.
- the indoor air blowing means 13 is preferably composed of, for example, a centrifugal fan, a multiblade fan, or the like, and the fan speed is controlled by an inverter device and the air volume is controlled.
- the use side heat exchanger 12 exchanges heat between the air supplied from the indoor air blowing means 13 and the refrigerant, and evaporates or condenses the refrigerant.
- a suction temperature sensor 16 for detecting the intake temperature of indoor air is provided in the vicinity of the air intake port of the main body casing of the indoor unit 1, and an outlet temperature sensor 17 for detecting the outlet temperature of conditioned air is provided in the vicinity of the air outlet. Is deployed.
- the indoor unit 1 also includes an indoor control device 14.
- the indoor control device 14 includes a general-purpose CPU, a data bus, an input / output port, a nonvolatile memory, a timer, and the like. Then, the indoor control device 14 performs predetermined control on the valve opening degree of the expansion valve 15, the fan rotation speed of the indoor air blowing means 13, and the like based on the operation information (indoor air temperature, set temperature, refrigerant pipe temperature, etc.). It has become.
- the indoor control device 14 is connected to an outdoor control device 23, which will be described later, via a transmission line (not shown), and can exchange information data with each other.
- the outdoor unit 2 is mounted with a compressor 21 and a heat source side heat exchanger 22 connected in series by piping.
- the compressor 21 sucks and compresses the refrigerant to bring it into a high temperature / high pressure state.
- the inverter 21 controls the motor rotation speed to control the capacity.
- the heat source side heat exchanger 22 functions as a condenser during cooling operation and functions as an evaporator during heating operation.
- an outdoor blower 24 for supplying air is provided in the vicinity of the heat source side heat exchanger 22, an outdoor blower 24 for supplying air is provided.
- Such outdoor blowing means 24 is constituted by a centrifugal fan, a multiblade fan, or the like.
- the heat source side heat exchanger 22 exchanges heat between the air supplied from the outdoor blower 24 and the refrigerant, and evaporates or condenses the refrigerant.
- the outdoor unit 2 includes an outdoor control device 23.
- the outdoor control device 23 includes a general-purpose CPU, a data bus including an input / output port, a nonvolatile memory, a timer, and the like. Then, the outdoor control device 23 determines predetermined values for the motor rotation speed of the compressor 21 and the fan rotation speed of the outdoor air blowing means 24 based on the operation information (indoor air temperature, set temperature, refrigerant pipe temperature, etc.) from the indoor unit 1. Control is to be performed.
- the indoor control device 14 of the indoor unit 1 or the outdoor control device 23 of the outdoor unit 2 includes a CPU (Central Processing Unit), a memory M, a timer T, and a data bus DB. ing. These components may be provided only in the indoor control device 14 of the indoor unit 1, may be provided only in the outdoor control device 23 of the outdoor unit 2, or may be provided in the indoor control device 14 and the outdoor control device 23. You may distribute to both of them.
- the input port of the data bus DB is connected to operation state detection means such as a suction temperature sensor 16 and a blow-out temperature sensor 17, and the output port is connected to the compressor 21, the outdoor air blowing means 24, the indoor air blowing means 13, and the expansion valve. Each driver for driving 15 is connected.
- the CPU includes a predetermined device control means 40, a thermo-on time counting means 41, a compressor start / stop count counting means 42, an outlet temperature decrease rate calculating means 43, a compressor control means 45, first to first, which will be described in detail later.
- Each function of the 4 thermo-on prohibition time setting means 46 and the first to fourth compressor forced stop means 47 is provided as program software.
- Each of these functions is stored in advance in the memory M as program data, and is extracted from the memory M and used by the CPU as necessary.
- the memory M stores in advance data related to a predetermined time such as 3 minutes, 5 minutes, and 10 minutes, a set temperature related to the blowout temperature of the indoor unit 1, and the like.
- thermo on The function of the compressor control means 45 of the CPU is to operate the "thermo on (hereinafter, thermo on) to drive the compressor 21 so that the blowing temperature detected by the blowing temperature sensor 17 approaches the preset temperature. Control) or “thermo-off (hereinafter referred to as thermo-OFF)” for stopping the compressor 21.
- the air conditioning apparatus 100 demonstrates centering on "cooling operation" which the air conditioning apparatus 100 performs.
- a refrigerant is sealed in the refrigerant circuit 200 of the air conditioner 100.
- the predetermined apparatus control means 40 of CPU performs normal operation control regarding cooling or heating. Therefore, the refrigerant in the refrigerant circuit 200 is made 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 that has flowed into the heat source side heat exchanger 22 exchanges heat with the air supplied from the outdoor blower 24 and condenses and liquefies.
- the condensed and liquefied refrigerant flows through the connection pipe 3 and flows into the expansion valve 15.
- the refrigerant flowing into the expansion valve 15 is decompressed and expanded, and changes its state to a low-temperature and low-pressure gas-liquid two-phase refrigerant.
- This gas-liquid two-phase refrigerant flows into the use-side heat exchanger 12, and the gas-liquid two-phase refrigerant that flows into the use-side heat exchanger 12 evaporates by exchanging heat with the indoor circulating air supplied by the indoor blowing means 13. Then gasify.
- the evaporated gas refrigerant flows out of the use-side heat exchanger 12, flows through the connection pipe 3, and is sucked into the compressor 21 again. In this way, the refrigeration cycle operation is repeated.
- the indoor air supplied to the usage-side heat exchanger 12 by the indoor air blowing means 13 is cooled by the evaporation heat of the refrigerant flowing into the usage-side heat exchanger 12, and then the cooling in which the indoor unit 1 is installed.
- the temperature rises by being supplied to the target area (air-conditioned room) and cooling the cooling target area and the heat generating devices installed in the cooling target area.
- the indoor air whose temperature has risen is supplied again to the use side heat exchanger 12 of the indoor unit 1 by the indoor air blowing means 13 and cooled by the heat of evaporation of the refrigerant. In this way, the indoor air is circulated.
- the indoor control device 14 determines whether or not the air conditioning capacity is necessary based on the difference between the suction temperature of the indoor unit 1 or the blowout temperature of the indoor unit 1 and the set temperature that is the target value, and stops the operation of the compressor 21. Take control. Once the thermostat is turned off, the indoor control device 14 determines whether the air conditioning capacity is necessary based on the difference between the suction temperature of the indoor unit 1 or the blowout temperature of the indoor unit 1 and the set temperature that is a target value thereof.
- the thermo-ON control for starting the operation of the compressor 21 is performed.
- FIG. 3 shows the change over time in the discharge capacity of the compressor 21 showing the thermo-ON and thermo-OFF states. In FIG. 3, between the immediately preceding thermo-ON time Po and the next thermo-ON (at start-up), the thermo-ON prohibition time Pn that does not force the compressor 21 to start (thermo OFF state) is set.
- thermo-ON time counting means 41 of the CPU measures the continuous thermo-ON time immediately before the thermo-off by the timer T (step S10).
- step S10 when the thermo-ON time immediately before the thermo-OFF is within 10 minutes (step S11), the CPU prohibits the thermo-ON for about 10 minutes assuming that the thermal load is small (step S12).
- the first compressor forced stop means 47 invalidates the start of the compressor 21 by the compressor control means 45 during the thermo-on inhibition time Pn set by the first thermo-on inhibition time setting means 46.
- step S10 when the thermo-ON time immediately before the thermo-OFF is 10 to 30 minutes (step S13), the CPU prohibits the thermo-ON for about 5 minutes (step S14), and the compressor 21 is started during that time. Disable.
- step S10 when the thermo-ON time immediately before the thermo-OFF is 30 minutes or longer (step S15), the CPU sets the thermo-ON prohibition (normal operation) for only 3 minutes assuming that the heat load is normal (step S15). S16), the start-up of the compressor 21 during that time is invalidated.
- the first thermo-on prohibition time setting means 46 takes out the next thermo-on prohibition time Pn corresponding to the thermo-on time counted by the thermo-on time counting means 41 from the memory M and sets it.
- a predetermined temperature for example, 1 ° C.
- the thermo ON prohibition is canceled.
- an operation signal forced thermo ON command signal
- the thermo-ON prohibition time is not fixed numerically, and can be arbitrarily set in a time of 3 minutes or more.
- the air conditioning apparatus 100 sets the next thermo-ON prohibition time Pn based on the thermo-ON time Po immediately before the thermo-off, and thus the immediately preceding thermo-ON time Po is short.
- the compressor 21 does not start for a long time (the thermo is not turned on) even if the air conditioning load state is actually low or the exhaustion of the heat generating equipment in the air-conditioned room does not return to the indoor unit 1. This can be prevented and the number of times the compressor 21 starts and stops can be suppressed.
- the immediately preceding thermo-ON time Po is long, that is, when the air-conditioning load state is high, the thermo-ON prohibition time Pn can be shortened and the compressor 21 can be started as soon as possible.
- FIG. 5 shows a second embodiment in which the thermo-ON prohibition time is set according to the number of past start / stop times of the compressor.
- the compressor start / stop count counting means 42 of the CPU counts the compressor start / stop counts for the past 1 hour and the past 24 hours immediately before the thermo-OFF (step S20).
- the CPU calculates an average compressor start / stop number (times / hour) in the past 24 hours from the compressor start / stop count counted in step S20 (step S21).
- step S21 When the average compressor start / stop count calculated in step S21 is 2 times / hour or more (step S22), the CPU determines whether the compressor start / stop count in the past 1 hour has been 6 times or more (step S22). Step S23). When the compressor start / stop frequency is 6 times or more (Yes), the second thermo-on prohibition time setting unit 46 sets the thermo-ON prohibition for about 10 minutes (step S24). Then, the second compressor forced stop means 47 starts the compressor 21 by the compressor control means 45 during the thermo-on prohibition time Pn (here 10 minutes) set by the second thermo-on prohibition time setting means 46. To disable.
- step S23 when the number of compressor start / stop times is less than 6 (No), the CPU disables the thermo-ON for only 3 minutes (normal operation) (step S25) and invalidates the start of the compressor 21. .
- step S26 when the average compressor start / stop count calculated in step S21 is less than 2 times / hour (step S26), the thermo-ON is prohibited (normal operation) for only 3 minutes (step S27), and the compressor 21 is started.
- the function of the second thermo-on prohibition time setting means 46 is to set the next thermo-on prohibition time Pn corresponding to the number of start / stops counted by the compressor start / stop count counting means 42 from the memory M. .
- thermo-ON prohibition time can be arbitrarily set to 3 minutes or more.
- the air conditioner 100 sets the thermo-ON prohibition time Pn based on the number of past start / stop times of the compressor 21, so that not only the most recent air conditioning load situation,
- the number of start / stop times of the compressor can be more reliably suppressed as compared with the first embodiment. That is, even when the number of times the compressor 21 is started and stopped, that is, when the air conditioning load state is actually low, or even when the exhaust heat of the heat generating device in the air-conditioned room does not return to the indoor unit 1, the compressor 21. Can be prevented from not starting for a long time (no thermo-ON).
- the number of start / stop times of the compressor 21 is small, that is, when the air conditioning load state is high, the thermo-ON prohibition time Pn can be minimized and the compressor 21 can be started as soon as possible.
- thermo-ON prohibition time is set by the thermo-ON time immediately before the thermo-OFF.
- thermo-ON prohibition time is set by the blowing temperature immediately before the thermo-OFF.
- FIG. 6 shows a third embodiment in which the thermo-ON prohibition time is set based on the blowing temperature immediately before the thermo-OFF.
- the blowing temperature sensor 17 measures the blowing temperature for 5 minutes until immediately before the thermo OFF (step S30).
- the blow-out temperature decrease rate calculation means 43 of the CPU calculates the blow-out temperature decrease rate (° K / min) during the thermo-ON and the compressor lower limit capacity operation from the measured blow temperature for 5 minutes. Is calculated (step S31).
- the third thermo-on prohibition time setting unit 46 extracts and sets the next thermo-on prohibition time Pn corresponding to the blow-out temperature decrease rate calculated by the blow-out temperature decrease rate calculation unit 43 from the memory M. That is, when the blowing temperature decrease rate calculated in step S31 is large (0.5 ° K / min or more: Yes in step S32), the CPU prohibits thermo-ON for about 10 minutes (step S33), and the compressor 21 during that time Disable startup of. On the other hand, when the blowing temperature decrease rate calculated in step S31 is small (less than 0.5 ° K / min: No in step S32), the CPU prohibits thermo-ON for only 3 minutes (normal operation) (step S34), The activation of the compressor 21 is invalidated. Then, the third compressor forced stop means 47 invalidates the start of the compressor 21 by the compressor control means 45 during the thermo-on prohibition time Pn set by the third thermo-on prohibition time setting means 46. is there.
- the air conditioning apparatus 100 sets the next thermo-ON prohibition time Pn based on the rate of decrease in the blow-out temperature immediately before the thermo-off, so compared with the first embodiment, The latest load situation can be accurately grasped, and the following effects can be further enhanced.
- the blowout temperature decrease rate immediately before the thermo-off is large, that is, when the air conditioning load state is actually low, or even when the exhaust heat of the heat generating device in the air-conditioned room does not return to the indoor unit 1, It is possible to prevent 21 from not starting for a long time (no thermo-ON), and to suppress the number of times the compressor 21 is started and stopped.
- thermo ON prohibition time Pn is minimized.
- the compressor 21 can be started as soon as possible after the thermo-off.
- Embodiment 4 FIG.
- the next thermo-ON prohibition time is set by the thermo-ON time immediately before the thermo-OFF.
- the thermo-ON prohibition time is set based on the rising speed of the suction temperature during the thermo-OFF.
- FIG. 7 shows Embodiment 4 in which the thermo-ON prohibition time is set based on the rising speed of the suction temperature during thermo-OFF.
- the suction temperature sensor 16 detects the suction temperature of 10 minutes of air sucked into the indoor unit 1 during the thermo OFF and outputs it to the CPU (step S40).
- the suction temperature rise rate calculating means 44 of the CPU calculates the suction temperature rise rate (° K / min) from the suction temperature detected by the suction temperature sensor 16 during 10 minutes during the thermo-off in step S40 (step S41). ).
- thermo-ON prohibition normal operation
- step S43 thermo-ON prohibition time setting unit 46 of the CPU takes out and sets the next thermo-on prohibition time Pn corresponding to the suction temperature increase rate calculated by the suction temperature increase rate calculation unit 44 from the memory M.
- the fourth compressor forced stop means 47 of the CPU invalidates the start of the compressor 21 by the compressor control means 45 during the thermo-on prohibition time Pn set by the fourth thermo-on prohibition time setting means 46. It is like that.
- the air conditioner 100 sets the thermo-ON prohibition time Pn based on the rising speed of the suction temperature during the thermo-OFF. In comparison, when the thermo OFF time is long and the air conditioning load increases rapidly, there is an effect that the thermo OFF prohibiting time Pn can be set according to the latest air conditioning load situation.
- the control according to the present invention is performed by the indoor control device 14 of the indoor unit 1.
- the control is performed by the outdoor control device 23 of the outdoor unit 2 or by the outdoor control device 23 and the indoor control device 14. You may make it carry out by cooperation.
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Abstract
Description
しかしながら、実際の被空調室内の空調負荷状態が低い場合や、被空調室内に置かれている発熱機器から発せられた廃熱が室内機に戻ってこない場合には、吸込み空気温度が上昇せず、圧縮機が長時間起動せず、設定された吹出し空気温度よりも高い温度の空気を吹き出し続けているという問題があった。
図1はこの発明の実施の形態1に係る空気調和装置の概略構成図である。以下、図1を参照しながら、この実施形態に係る空気調和装置について説明する。
図1において、この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、室内機1と室外機2を接続する冷媒流通用の接続配管3と、から構成されている。そして、室外機2の圧縮機21および熱源側熱交換器22と、接続配管3と、室内機1の膨張弁15および利用側熱交換器12と、接続配管3とが順次環状に配管接続されることにより、冷凍サイクル動作を行なう冷媒回路200を構成している。
ここでは、空気調和装置100が実行する「冷房運転」を中心に説明する。空気調和装置100の冷媒回路200には冷媒が封入されている。そして、CPUの所定機器制御手段40は、冷房または暖房に関する通常の運転制御を実行するようになっている。そこで、冷媒回路200中の冷媒は、圧縮機21で高温・高圧にされ、圧縮機21から吐出して、熱源側熱交換器22に流入する。熱源側熱交換器22に流入した冷媒は、室外送風手段24から供給される空気と熱交換して凝縮液化する。凝縮液化した冷媒は、接続配管3を流通して膨張弁15に流入する。膨張弁15に流入した冷媒は減圧されて膨張し、低温・低圧の気液二相状態の冷媒に状態変化する。この気液二相冷媒は利用側熱交換器12に流入し、利用側熱交換器12に流入した気液二相冷媒は、室内送風手段13により供給される室内循環空気と熱交換して蒸発しガス化する。蒸発ガス化した冷媒は、利用側熱交換器12から流出して接続配管3を流通し、圧縮機21に再度吸入される。このようにして、冷凍サイクル動作が繰り返される。
まず、CPUのサーモオン時間カウント手段41が、サーモOFF直前の連続したサーモON時間をタイマTにより計時する(ステップS10)。このステップS10において、サーモOFF直前のサーモON時間が10分以内であったとき(ステップS11)、CPUは熱負荷が小さいものとして10分間ほどのサーモON禁止にする(ステップS12)。そして、第1圧縮機強制停止手段47は、第1サーモオン禁止時間設定手段46により設定されたサーモオン禁止時間Pnの間中で圧縮機制御手段45による圧縮機21の起動を無効にする。尚、ステップS10において、サーモOFF直前のサーモON時間が10~30分であったとき(ステップS13)、CPUは、5分間ほどのサーモON禁止とし(ステップS14)、その間の圧縮機21の起動を無効にする。また、ステップS10において、サーモOFF直前のサーモON時間が30分以上であったとき(ステップS15)、CPUは、熱負荷が通常であるとして3分間のみのサーモON禁止(通常運転)とし(ステップS16)、その間の圧縮機21の起動を無効にする。すなわち、第1サーモオン禁止時間設定手段46は、サーモオン時間カウント手段41により計時されたサーモオン時間に応じた次回のサーモオン禁止時間PnをメモリMから取り出して設定するのである。
尚、サーモOFF時の空調機吸込温度よりも所定温度(例えば1℃)だけ上昇した場合は、サーモON禁止を解除する。また、外部から運転信号(強制サーモON指令信号)が入った場合も、サーモON禁止を解除できる。そして、前記のサーモON禁止時間は数値固定されたものでなく、3分以上の時間で任意に設定できる。
実施の形態1はサーモOFF直前のサーモON時間により次回のサーモオン禁止時間を設定するようにしたものであるが、次に、過去の圧縮機の発停回数によりサーモON禁止時間を設定する実施の形態2を説明する。
図5は過去の圧縮機の発停回数によりサーモON禁止時間を設定する実施形態2を示している。
まず、CPUの圧縮機発停回数カウント手段42が、サーモOFF直前の過去1時間および過去24時間の圧縮機発停回数を計数する(ステップS20)。次に、CPUは、ステップS20で計数した圧縮機発停回数から、過去24時間における平均圧縮機発停回数(回/時間)を算出する(ステップS21)。このステップS21において算出した平均圧縮機発停回数が2回/時間以上であったとき(ステップS22)、CPUは過去1時間における圧縮機発停回数が6回以上であったか否かを判断する(ステップS23)。圧縮機発停回数が6回以上であった場合(Yes)、第2サーモオン禁止時間設定手段46は、10分間ほどサーモON禁止に設定する(ステップS24)。そして、第2圧縮機強制停止手段47は、第2サーモオン禁止時間設定手段46により設定されたサーモオン禁止時間Pn(ここでは10分間)の間中で圧縮機制御手段45による圧縮機21の起動を無効にする。そして、ステップS23において、圧縮機発停回数が6回未満のとき(No)、CPUは、3分間のみのサーモON禁止(通常運転)とし(ステップS25)、圧縮機21の起動を無効にする。一方、ステップS21において算出した平均圧縮機発停回数が2回/時間未満のとき(ステップS26)は、3分間のみのサーモON禁止(通常運転)とし(ステップS27)、圧縮機21の起動を無効にする。すなわち、上記の第2サーモオン禁止時間設定手段46の機能は、圧縮機発停回数カウント手段42により計数された発停回数に応じた次回のサーモオン禁止時間PnをメモリMから取り出して設定するのである。
尚、サーモOFF時の空調機の吸込み温度よりも所定温度(例えば1℃)ほど上昇した場合は、サーモON禁止を解除する。また、外部から運転信号(強制サーモON信号)が入った場合も、サーモON禁止を解除できる。そして、サーモON禁止時間は3分以上に任意に設定できる。
実施の形態1はサーモOFF直前のサーモON時間により次回のサーモオン禁止時間を設定するようにしたものであるが、次に、サーモOFF直前の吹出し温度によりサーモON禁止時間を設定する実施の形態3を説明する。
図6は、サーモOFF直前の吹出し温度によりサーモON禁止時間を設定する実施形態3を示している。
まず、吹出し温度センサ17がサーモOFF直前までの5分間の吹出し温度を測定する(ステップS30)。次に、ステップS30では、CPUの吹出し温度低下速度算出手段43が、測定された5分間の吹出し温度から、サーモON中でかつ圧縮機下限容量運転時の吹出し温度低下速度(°K/min)を算出する(ステップS31)。続いて、第3サーモオン禁止時間設定手段46が、吹出し温度低下速度算出手段43により算出された吹出し温度の低下速度に応じた次回のサーモオン禁止時間PnをメモリMから取り出して設定する。すなわち、ステップS31で算出した吹出し温度低下速度が大きいとき(0.5°K/min以上:ステップS32のYes)、CPUは10分間ほどのサーモON禁止とし(ステップS33)、その間の圧縮機21の起動を無効にする。一方、ステップS31で算出した吹出し温度低下速度が小さいとき(0.5°K/min未満:ステップS32のNo)、CPUは3分間のみのサーモON禁止(通常運転)とし(ステップS34)、その間の圧縮機21の起動を無効にする。そうして、第3圧縮機強制停止手段47は、第3サーモオン禁止時間設定手段46により設定されたサーモオン禁止時間Pnの間中に圧縮機制御手段45による圧縮機21の起動を無効にするのである。
実施の形態1はサーモOFF直前のサーモON時間により次回のサーモオン禁止時間を設定するようにしたものであるが、次に、サーモOFF中の吸込み温度の上昇速度によりサーモON禁止時間をする実施の形態4を説明する。
図7はサーモOFF中の吸込み温度の上昇速度によりサーモON禁止時間を設定する実施形態4を示している。
まず、吸込み温度センサ16は、サーモOFF中に室内機1に吸い込まれた10分間ぶんの空気の吸込み温度を検出しCPUに出力する(ステップS40)。次に、CPUの吸込み温度上昇速度算出手段44は、ステップS40でサーモオフ中の10分間に吸込み温度センサ16により検出された吸込み温度から吸込み温度上昇速度(°K/min)を算出する(ステップS41)。ステップS41で算出された上昇速度が小さいとき(0.2°K/min以下:ステップS42のYes)は、3分間のみのサーモON禁止(通常運転)をスタートする(ステップS43)。すなわち、CPUの第4サーモオン禁止時間設定手段46は、吸込み温度上昇速度算出手段44により算出された吸込み温度の上昇速度に応じた次回のサーモオン禁止時間PnをメモリMから取り出して設定するのである。続いて、CPUの第4圧縮機強制停止手段47は、第4サーモオン禁止時間設定手段46により設定されたサーモオン禁止時間Pnの間中に圧縮機制御手段45による圧縮機21の起動を無効にするようになっている。
また、上記では、本発明に係る制御を室内機1の室内制御装置14で行なわせるようにしたが、その制御を室外機2の室外制御装置23で、または室外制御装置23および室内制御装置14により協働で行なわせるようにしても構わない。
2 室外機
3 接続配管
12 利用側熱交換器
13 室内送風手段
14 室内制御装置
15 膨張弁
16 吸込み温度センサ
17 吹出し温度センサ
21 圧縮機
22 熱源側熱交換器
23 室外制御装置
24 室外送風手段
40 所定機器制御手段
41 サーモオン時間カウント手段
42 圧縮機発停回数カウント手段
43 吹出し温度低下速度算出手段
44 吸込み温度上昇速度算出手段
45 圧縮機制御手段
46 第1~第4サーモオン禁止時間設定手段
47 第1~第4圧縮機強制停止手段
100 空気調和装置
200 冷媒回路
M メモリ
Pn サーモON禁止時間
Po サーモON時間
T タイマ
Claims (5)
- 圧縮機、熱源側熱交換器、膨張弁および利用側熱交換器を順次環状に接続して成る冷媒回路と、
前記利用側熱交換器が配備された室内機内で前記利用側熱交換器を通過して被空調室内に吹き出される空気の吹出し温度を検出する吹出し温度センサと、
前記吹出し温度センサにより検出された吹出し温度を、予め設定されている設定温度に近づけるように、前記圧縮機を駆動するサーモオンまたは前記圧縮機を停止するサーモオフの制御を行なう圧縮機制御手段と、を備えて成り、
サーモオフ直前またはサーモオフ中の空調運転状態に応じて、次回のサーモオンを禁止する時間を設定することを特徴とする空気調和装置。 - サーモオフ直前の連続したサーモオンの時間を計時するサーモオン時間カウント手段と、
前記サーモオン時間カウント手段により計時されたサーモオン時間に基づいて次回のサーモオンを禁止する時間を算出して設定する第1サーモオン禁止時間設定手段と、
前記第1サーモオン禁止時間設定手段により設定されたサーモオン禁止時間中は圧縮機制御手段による圧縮機の起動を無効にする第1圧縮機強制停止手段と、
を備えていることを特徴とする請求項1に記載の空気調和装置。 - 過去の所定時間内に生じた圧縮機の発停回数を計数する圧縮機発停回数カウント手段と、
前記圧縮機発停回数カウント手段により計数された発停回数に基づいて次回のサーモオンを禁止する時間を算出して設定する第2サーモオン禁止時間設定手段と、
前記第2サーモオン禁止時間設定手段により設定されたサーモオン禁止時間中は圧縮機制御手段による圧縮機の起動を無効にする第2圧縮機強制停止手段と、
を備えていることを特徴とする請求項1に記載の空気調和装置。 - サーモオフ直前の所定時間内に吹出し温度センサにより検出された吹出し温度の低下速度を算出する吹出し温度低下速度算出手段と、
前記吹出し温度低下速度算出手段により算出された吹出し温度の低下速度に基づいて次回のサーモオンを禁止する時間を算出して設定する第3サーモオン禁止時間設定手段と、
前記第3サーモオン禁止時間設定手段により設定されたサーモオン禁止時間中は圧縮機制御手段による圧縮機の起動を無効にする第3圧縮機強制停止手段と、
を備えていることを特徴とする請求項1に記載の空気調和装置。 - 室内機に吸い込まれた空気の吸込み温度を検出する吸込み温度センサと、
サーモオフ中の所定時間内に吸込み温度センサにより検出された吸込み温度の上昇速度を算出する吸込み温度上昇速度算出手段と、
前記吸込み温度上昇速度算出手段により算出された吸込み温度の上昇速度に基づいて次回のサーモオンを禁止する時間を算出して設定する第4サーモオン禁止時間設定手段と、
前記第4サーモオン禁止時間設定手段により設定されたサーモオン禁止時間中は圧縮機制御手段による圧縮機の起動を無効にする第4圧縮機強制停止手段と、
を備えていることを特徴とする請求項1に記載の空気調和装置。
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| WO2022101989A1 (ja) * | 2020-11-10 | 2022-05-19 | 三菱電機株式会社 | 空気調和装置、および空気調和装置の学習装置 |
| CN115875764A (zh) * | 2022-12-02 | 2023-03-31 | 青岛海尔空调器有限总公司 | 空调系统的控制方法、装置、设备及产品 |
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| WO2022101989A1 (ja) * | 2020-11-10 | 2022-05-19 | 三菱電機株式会社 | 空気調和装置、および空気調和装置の学習装置 |
| EP4246050A4 (en) * | 2020-11-10 | 2024-03-27 | Mitsubishi Electric Corporation | AIR CONDITIONING DEVICE AND AIR CONDITIONING DEVICE LEARNING DEVICE |
| CN115875764A (zh) * | 2022-12-02 | 2023-03-31 | 青岛海尔空调器有限总公司 | 空调系统的控制方法、装置、设备及产品 |
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| Publication number | Publication date |
|---|---|
| GB2542083A (en) | 2017-03-08 |
| US10001294B2 (en) | 2018-06-19 |
| US20170191686A1 (en) | 2017-07-06 |
| GB2542083B (en) | 2020-04-08 |
| GB201700152D0 (en) | 2017-02-22 |
| JP6312830B2 (ja) | 2018-04-18 |
| JPWO2016016913A1 (ja) | 2017-04-27 |
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