WO2015125252A1 - 冷凍サイクル装置 - Google Patents
冷凍サイクル装置 Download PDFInfo
- Publication number
- WO2015125252A1 WO2015125252A1 PCT/JP2014/054031 JP2014054031W WO2015125252A1 WO 2015125252 A1 WO2015125252 A1 WO 2015125252A1 JP 2014054031 W JP2014054031 W JP 2014054031W WO 2015125252 A1 WO2015125252 A1 WO 2015125252A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- refrigerant
- unit
- update
- heat exchanger
- refrigeration cycle
- Prior art date
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B45/00—Arrangements for charging or discharging refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements
Definitions
- the present invention relates to a refrigeration cycle.
- An air conditioner that is a refrigeration cycle apparatus has, for example, a compressor, a condenser, a throttling device, an evaporator, and the like, and has a refrigerant circuit configured by connecting them through refrigerant piping.
- the refrigerant circuit is filled with refrigerant and refrigerant oil flowing out of the compressor. Since the refrigerating machine oil has a function of suppressing the friction of sliding parts in the compressor, it is better that the refrigerating machine oil stays in the compressor. However, a part of the refrigerating machine oil is mixed with the refrigerant in the compressor, and is discharged from the compressor together with the refrigerant and released outside the compressor.
- Patent Document 1 a refrigerant cleaning device has been proposed that allows a gas-liquid two-phase mixed flow to flow through the refrigerant circuit to clean the refrigerating machine oil remaining in the refrigerant circuit (see, for example, Patent Document 1).
- the cleaning device described in Patent Document 1 can be connected to the indoor unit in order to capture the refrigeration oil in the indoor unit on the usage side and the piping on the indoor unit side. And in the washing
- Japanese Patent No. 3521820 see, for example, claim 1, paragraphs 0006 and 0007 and FIG. 1
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a refrigeration cycle apparatus capable of suppressing a work load at the time of refrigerant renewal.
- a refrigeration apparatus includes a compressor, a heat source apparatus side heat exchanger, a first expansion device, and a utilization side heat exchanger, which are connected by a refrigerant pipe, a compression circuit, Is connected between the heat exchanger and the use side heat exchanger, and separates the refrigerant in the refrigerant circuit from the remaining foreign matter, and the capture unit according to the type of the refrigerant before the update and the type of the refrigerant after the update.
- a control unit that switches whether or not to perform a residual foreign matter recovery operation for flowing the renewed refrigerant, and the capturing unit includes a first on-off valve provided in the flow path of the capturing unit, and the control unit Is based on the information on the type of refrigerant before update and the type of refrigerant after update, and information on the type of refrigerant before update and the type of refrigerant after update received by the acquisition unit.
- Recovery operation determination means for determining whether or not to recover, and refrigerant after the recovery operation determination means is updated When it is determined that circulates in the refrigerant circuit, and has a recovery operation control means for opening the first on-off valve.
- the refrigeration apparatus according to the present invention has the above-described configuration, it is possible to suppress the work load when the refrigerant is updated.
- FIG. 6 is a flowchart for explaining processing relating to setting of whether or not to perform a residual foreign matter recovery operation of the refrigeration cycle apparatus according to Embodiment 1 of the present invention and setting of refrigerant pressure. It is a flowchart explaining the process regarding implementation of the residual foreign material collection
- FIG. FIG. 1 is an example of a refrigerant circuit configuration of the refrigeration cycle apparatus 100 according to the first embodiment.
- FIG. 2 is an explanatory diagram of a foreign matter trapping part provided in the refrigeration cycle apparatus 100 according to the first embodiment.
- FIG. 3 is an explanatory diagram of a configuration example of the control unit 50 and the like of the refrigeration cycle apparatus 100 according to the first embodiment.
- the configuration of the refrigeration cycle apparatus 100 will be described with reference to FIGS.
- the refrigeration cycle apparatus 100 according to Embodiment 1 is provided with an improvement that can suppress the work load when the refrigerant is updated.
- the refrigeration cycle apparatus 100 includes a plurality of indoor units A to C on the use side, an outdoor unit D on the heat source side, and an extension pipe E and an extension pipe F that connect the indoor units A to C and the outdoor unit D. It is what you have.
- the refrigeration cycle apparatus 100 includes a compressor 1 that compresses refrigerant, an accumulator 9 that stores liquid refrigerant, and an oil recovery unit 23 that returns refrigeration oil (mineral oil) discharged from the compressor 1 to the suction side of the compressor 1.
- a four-way valve 2 used for switching the refrigerant flow, a heat source machine side heat exchanger 3 functioning as a radiator (condenser) during heating operation, and a use side heat exchange functioning as an evaporator during heating operation 5A to 5C, the second gas-liquid separator 20 that separates the gas refrigerant and the liquid refrigerant, the inter-refrigerant heat exchanger 7 that liquefies the refrigerant to be supplied to the capturing unit 60, and the refrigerant used before renewal. It is used to capture the refrigerating machine oil and the like before being updated, and has a capturing unit 60 having the first gas-liquid separator 21 and the oil recovery unit 8 and the like.
- the refrigeration cycle apparatus 100 has a bypass pipe 38 having one end connected to the extension pipe E and the other end connected to the capturing unit 60, one end connected to the liquid side of the second gas-liquid separator 20, and the like.
- a connection pipe 39 whose end side is connected to the bypass pipe 38, and a refrigerant return pipe 37 ⁇ / b> A and a refrigerant return pipe 37 ⁇ / b> B that return the gas refrigerant from the capturing unit 60 to the downstream side of the compressor 1.
- the refrigeration cycle apparatus 100 includes a second on-off valve 10, a first on-off valve 11, an on-off valve 24, an on-off valve 25, an on-off valve 28 and an on-off valve 29 used for opening and closing the flow path, and control of the flow rate.
- the refrigeration cycle apparatus 100 has various sensors. That is, the refrigeration cycle apparatus 100 has the pressure detection means 13, the pressure detection means 14, and the pressure detection means 15 as pressure detection mechanisms, and the temperature detection means 16, the temperature detection means 17, and the temperature detection means 18A to 18A as temperature detection mechanisms. 18C, temperature detection means 19A to 19C, and temperature detection means 22. In addition, the refrigeration cycle apparatus 100 includes a control unit 50 that controls the number of revolutions of the compressor 1 based on the detection results of these various sensors.
- the refrigeration cycle apparatus 100 includes the compressor 1, the heat source apparatus side heat exchanger 3, the first expansion apparatuses 4A to 4C, the use side heat exchangers 5A to 5C, and the like, which are connected by refrigerant piping. It has a configured refrigerant circuit.
- the control unit 50 has a function of collecting the refrigerating machine oil remaining in the refrigerant circuit of the refrigeration cycle apparatus 100 in the capturing unit 60 and performing a residual foreign matter collecting operation for cleaning the refrigerant circuit. By performing the residual foreign matter collecting operation, the residual foreign matter in the refrigerant circuit can be collected in the capturing unit 60 and the refrigerant circuit can be cleaned.
- a refrigerant having a GWP value of 1000 or less or a refrigerant containing a refrigerant having a GWP value of 1000 or less is used.
- the outdoor unit D includes a compressor 1, an accumulator 9, an oil recovery unit 23, a four-way valve 2, a heat source unit side heat exchanger 3, a second gas-liquid separator 20, an inter-refrigerant heat exchanger 7, and a capturing unit.
- the indoor units A to C provided in parallel are connected to the outdoor unit D via an extension pipe E and an extension pipe F through which the refrigerant flowing out from the heat source unit side heat exchanger 3 flows during the residual foreign matter recovery operation. ing.
- the compressor 1 sucks a refrigerant, compresses the refrigerant, and discharges the refrigerant in a high temperature and high pressure state.
- the compressor 1 the refrigerant discharge side is connected to the oil recovery unit 23, and the refrigerant suction side is connected to the capturing unit 60 and the accumulator 9.
- the compressor 1 is good to comprise, for example with an inverter compressor.
- the compressor 1 is supplied with, for example, a refrigerant flowing out from the accumulator 9, and is fixed to, for example, a sealed container in which refrigerator oil or the like is stored at the bottom, an intake pipe and a discharge pipe connected to the sealed container, and an inner surface of the sealed container.
- the compressor 1 has sliding parts such as a compressor mechanism for compressing the refrigerant.
- the refrigerating machine oil for suppressing that the sliding component will be damaged by friction etc. is stored in the airtight container of the compressor 1.
- a part of the refrigerating machine oil is taken into the compression mechanism together with the refrigerant and flows out from the discharge pipe together with the refrigerant.
- the accumulator 9 stores excess refrigerant in the refrigerant circuit as liquid refrigerant.
- the refrigerant inflow side is connected to the gas side of the second gas-liquid separator 20, and the refrigerant outflow side is connected to the suction side of the compressor 1.
- the oil recovery unit 23 is used to return the refrigeration oil discharged from the compressor 1 to the compressor 1.
- the oil recovery unit 23 is connected to the discharge side of the compressor 1, the four-way valve 2, and the suction side of the compressor 1. That is, the refrigerant discharged from the compressor 1 passes through the oil recovery unit 23 and is supplied to the four-way valve 2 side, and the refrigeration oil discharged from the compressor 1 is supplied to the oil return pipe connected to the oil recovery unit 23. It is returned to the suction side of the compressor 1 through 23A.
- the four-way valve 2 is used for switching between heating operation and cooling operation.
- the four-way valve 2 connects the discharge side of the compressor 1 and the heat source unit side heat exchanger 3 during cooling operation, and connects the suction side of the compressor 1 and the use side heat exchangers 5A to 5C.
- the four-way valve 2 connects the discharge side of the compressor 1 and the use side heat exchangers 5A to 5C during the heating operation, and connects the suction side of the compressor 1 and the heat source unit side heat exchanger 3.
- the heat source device side heat exchanger 3 functions as a radiator during cooling operation and functions as an evaporator during heating operation.
- the heat source machine side heat exchanger 3 has one side connected to the four-way valve 2 and the other side connected to the inter-refrigerant heat exchanger 7.
- the heat source device side heat exchanger 3 includes a heat exchanger 3A and a heat exchanger 3B. That is, the refrigeration cycle apparatus 100 has two heat exchangers that can switch between supplying the refrigerant only to the heat exchanger 3B and supplying the refrigerant to both the heat exchanger 3A and the heat exchanger 3B. have.
- One side of the heat exchanger 3 ⁇ / b> A is connected to the four-way valve 2 via the on-off valve 24, and the other side is connected to the inter-refrigerant heat exchanger 7 via the on-off valve 25.
- the use-side heat exchangers 5A to 5C function as an evaporator during cooling operation and function as a radiator during heating operation.
- the use side heat exchangers 5A to 5C have one side connected to the four-way valve 2 via the on-off valve 29 and the other side connected to the first expansion devices 4A to 4C.
- the heat source device side heat exchanger 3 and the use side heat exchangers 5A to 5C are plate fin and tube type heat exchangers capable of exchanging heat between the refrigerant flowing in the tube and the air passing through the fins, for example. Can be configured.
- the second gas-liquid separator 20 separates the refrigerant supplied from the use side heat exchangers 5A to 5C into the liquid refrigerant and the gas refrigerant during the cooling operation, and from the heat source unit side heat exchanger 3 side during the heating operation.
- the supplied refrigerant is separated into a liquid refrigerant and a gas refrigerant.
- the second gas-liquid separator 20 separates the refrigerant supplied from the use side heat exchangers 5A to 5C into liquid refrigerant and gas refrigerant during the residual foreign matter recovery operation.
- the second gas-liquid separator 20 has a refrigerant inflow side connected to the four-way valve 2, a gas refrigerant outflow side connected to the accumulator 9, and a liquid refrigerant outflow side connected to one end side of the connection pipe 39.
- the inter-refrigerant heat exchanger 7 is connected to a refrigerant pipe and a bypass pipe 38 between the first expansion devices 4A to 4C and the heat source apparatus side heat exchanger 3, and flows through the refrigerant pipe and the bypass pipe 38. Heat exchange with the refrigerant is performed.
- a double pipe heat exchanger can be used as the inter-refrigerant heat exchanger 7, for example.
- the inter-refrigerant heat exchanger 7 has a first flow path 7A and a second flow path 7B as refrigerant flow paths.
- the inter-refrigerant heat exchanger 7 exchanges heat between the refrigerant flowing through the first flow path 7A and the refrigerant flowing through the second flow path 7B.
- One side of the first flow path 7 ⁇ / b> A is connected to the heat source unit side heat exchanger 3 via the on-off valve 25, and the other side is connected to the bypass pipe 38 and the expansion device 27.
- the second flow path 7B is connected to the bypass pipe 38.
- the capturing unit 60 is connected between the compressor 1 and the use-side heat exchangers 5A to 5C, and includes the renewed refrigerant enclosed in the refrigerant circuit and the residual foreign matter related to the pre-update refrigerant previously enclosed in the refrigerant circuit.
- the remaining foreign matter can be stored.
- the residual foreign matter is made up of, for example, refrigerating machine oil before renewal and deteriorated refrigerating machine oil before renewal.
- the capturing unit 60 includes the first gas-liquid separator 21, the first on-off valve 11, and the oil recovery unit 8.
- the refrigerant inflow side is connected to the bypass pipe 38, and the gas refrigerant outflow side is connected between the compressor 1 and the use side heat exchangers 5A to 5C via the refrigerant return pipe 37A.
- the refrigerant outflow side is connected to the first on-off valve 11.
- the first gas-liquid separator 21 has the same function as the second gas-liquid separator 20.
- the first on-off valve 11 is connected between the first gas-liquid separator 21 and the oil recovery unit 8 in the flow path of the capturing unit 60. The first on-off valve 11 is controlled to be opened and closed by the control unit 50.
- the oil recovery unit 8 has a refrigerant inflow side connected to the liquid refrigerant outflow side of the first gas-liquid separator 21 via the first on-off valve 11, and a gas refrigerant outflow side of the compressor 1 via the refrigerant return pipe 37B. It is connected to the suction side.
- the capturing unit 60 does not have to be mounted on the outdoor unit D from the beginning, and may be provided detachably on the outdoor unit D.
- bypass pipe 38 One end side of the bypass pipe 38 is connected to the refrigerant pipe between the heat source apparatus side heat exchanger 3 and the first expansion devices 4A to 4C, and the other end side is connected to the first gas-liquid separator 21 of the trap 60. It is what has been. More specifically, one end side of the bypass pipe 38 is connected to the refrigerant pipe between the first flow path 7 ⁇ / b> A of the inter-refrigerant heat exchanger 7 and the expansion device 27.
- the bypass pipe 38 is provided with a second flow path 7B for the second expansion device 6 and the inter-refrigerant heat exchanger 7.
- connection pipe 39 has one end connected to the downstream side of the use side heat exchangers 5A to 5C during the cooling operation and the other end connected to the bypass pipe 38. More specifically, one end side of the connection pipe 39 is connected to the second gas-liquid separator 20, and the other end side is between the second expansion device 6 and the second flow path 7B in the bypass pipe 38. It is connected to the.
- the connection pipe 39 is provided with a second on-off valve 10.
- One end side of the refrigerant return pipe 37A is connected to the first gas-liquid separator 21, and the other end side is connected to the refrigerant pipe downstream from the accumulator 9 and upstream from the second gas-liquid separator 20. It is what.
- a check valve 26 is provided in the refrigerant return pipe 37 ⁇ / b> A so that gas refrigerant flows from the capturing unit 60 side to the downstream side of the accumulator 9.
- the refrigerant return pipe 37B has one end connected to the oil recovery unit 8 and the other end connected to the suction side of the compressor 1.
- a check valve 12 is provided in the refrigerant return pipe 37 ⁇ / b> B so that a gas refrigerant flows from the capturing unit 60 side to the suction side of the compressor 1.
- the second on-off valve 10 is a valve connected to the connection pipe 39.
- the first on-off valve 11 is a valve provided in the capturing unit 60.
- the on-off valve 24 and the on-off valve 25 are valves connected to the heat exchanger 3 ⁇ / b> A of the heat source device side heat exchanger 3.
- the on-off valve 28 is connected to the extension pipe E.
- the on-off valve 29 is connected to the extension pipe F.
- the first throttling devices 4A to 4C, the second throttling device 6 and the throttling device 27 are throttling devices used for expanding the refrigerant, and include, for example, an electronic expansion valve having a variable opening, a capillary tube, and the like. can do.
- the first expansion device 4A is connected between the use side heat exchanger 5A and the heat source unit side heat exchanger 3.
- the first expansion device 4B is connected between the use side heat exchanger 5B and the heat source device side heat exchanger 3.
- the first expansion device 4 ⁇ / b> C is connected between the use side heat exchanger 5 ⁇ / b> C and the heat source device side heat exchanger 3.
- the second expansion device 6 is connected to the upstream side of the second flow path 7B of the inter-refrigerant heat exchanger 7 in the bypass pipe 38.
- the expansion device 27 is connected between the first flow path 7 ⁇ / b> A of the inter-refrigerant heat exchanger 7 and the on-off valve 28.
- the pressure detection means 13 to 15 are sensors used for measuring the pressure inside the pipe.
- the pressure detectors of the pressure detectors 13 to 15 are electrically connected to the controller 50.
- a pressure detection method a resistance that varies depending on the pressure is built in the pressure detection unit, and the control unit 50 reads the resistance value to convert the pressure, and the like.
- the pressure detection means 13 is attached to a refrigerant pipe connecting the discharge side of the compressor 1 and the oil recovery unit 23, and detects the pressure of the refrigerant flowing through the refrigerant pipe.
- the pressure detection means 14 is attached to a refrigerant pipe connecting the second gas-liquid separator 20 and the accumulator 9, and detects the pressure of the refrigerant flowing through the refrigerant pipe.
- the pressure detection means 15 is attached to a refrigerant pipe that connects the expansion device 27 and the on-off valve 28.
- the temperature detection means 16, the temperature detection means 17, the temperature detection means 18A to 18C, the temperature detection means 19A to 19C, and the temperature detection means 22 are sensors that are used to measure the surface temperature of a part to be measured such as piping. These temperature detection means are provided with a detection unit at the tip of the sensor and are electrically connected to the control unit 50. For example, as a temperature detection method, it is possible to adopt a method in which a resistance variable according to temperature is built in the detection unit, and the control unit 50 reads the resistance value and converts the temperature.
- the temperature detecting means 16 is attached to a refrigerant pipe connecting the discharge side of the compressor 1 and the oil recovery unit 23, and detects the temperature of the refrigerant flowing through the refrigerant pipe.
- the temperature detecting means 17 is attached to the downstream side of the second flow path 7B of the inter-refrigerant heat exchanger 7 in the bypass pipe 38, and detects the temperature of the bypass pipe 38.
- the temperature detecting means 18A and the temperature detecting means 19A are provided in one side refrigerant pipe and the other side refrigerant pipe connected to the use side heat exchanger 5A, respectively.
- the temperature detection means 18B and the temperature detection means 19B are respectively provided on one refrigerant pipe and the other refrigerant pipe connected to the use side heat exchanger 5B.
- the temperature detection means 18C and the temperature detection means 19C are respectively provided on one side refrigerant pipe and the other side refrigerant pipe connected to the use side heat exchanger 5C.
- the temperature detection means 18A to 18C and the temperature detection means 19A to 19C also detect the temperature of the refrigerant flowing through the attached refrigerant pipe.
- the temperature detecting means 22 is used for detecting the outdoor temperature.
- Control unit 50 The controller 50 is attached to the rotational speed (including operation and stop) of the compressor 1, the heat source apparatus side heat exchanger 3 and the use side heat exchanger 5A based on the detection results of the pressure detection mechanism and the temperature detection mechanism.
- the apertures of the aperture devices 4A to 4C, the second aperture device 6, and the aperture device 27 are controlled.
- the control unit 50 can switch whether or not to perform the residual foreign material recovery operation in which the post-update refrigerant flows through the capturing unit 60 according to the type of the pre-update refrigerant.
- the control unit 50 receives the information on the type of refrigerant before update input to the terminal 51 by a service person of the refrigeration cycle apparatus 100 and the like, and the type and update of refrigerant before update received by the acquisition unit 50A.
- the recovery operation determination unit 50B determines whether or not to circulate the updated refrigerant to the refrigerant circuit based on the information on the type of the subsequent refrigerant, and the recovery operation determination unit 50B circulates the updated refrigerant to the refrigerant circuit
- the second throttle device 6 is closed, and the first on-off valve 11 and the second on-off valve 10 are opened.
- the acquisition unit 50A receives information on the type of refrigerant before update and the type of refrigerant after update.
- the acquisition unit 50A acquires information on the type of refrigerant such as R407C, for example.
- the recovery operation determination unit 50B has a function of setting a flag corresponding to the determination. For example, if the type of the pre-update refrigerant and the type of the post-update refrigerant are completely the same, the recovery operation determination unit 50B determines that the residual foreign matter recovery operation is not performed. For example, if the pre-update refrigerant is a mixed refrigerant, the determination may be made based on the refrigerant having the largest component, or if the refrigerant is a mixed refrigerant, it may be determined that the residue collecting operation is performed uniformly.
- the recovery operation determination unit 50B includes, for example, a table in which the type of the pre-update refrigerant and the type of the post-update refrigerant correspond to whether or not the residual foreign matter recovery operation is performed. Using this table, the recovery operation determination unit 50B determines whether to perform the residual foreign matter recovery operation.
- the recovery operation control means 50C performs the cooling operation for a short time after the first on-off valve 11 and the second on-off valve 10 have been opened, and then performs the cooling operation for a short time. The second on-off valve 10 is closed.
- the terminal 51 may be mounted on the outdoor unit D, for example. That is, the terminal 51 may be configured by an input device or the like that is connected to the control unit 50 by wire and includes a switch that inputs a type of refrigerant, or a remote control that is connected to the control unit 50 wirelessly. Also good. Further, the terminal 51 does not have to have the configuration of the refrigeration cycle apparatus 100, and may be a mobile phone having a predetermined application, for example.
- the refrigerant type is set for one refrigeration cycle apparatus 100
- the refrigerant of the remaining refrigeration cycle apparatuses 100 This can also be reflected in the setting of the seed, and an efficient setting of the refrigerant kind can be realized.
- the terminal 51 is connected to the control unit 50 of the outdoor unit D and a switch for setting the refrigerant type is provided
- the terminal 51 is provided with switches 1 to 4, and when the switch 1 is turned on, the refrigerant before renewal is the R22 refrigerant, when the switch 2 is turned on, the refrigerant before the renewal is R407C refrigerant, and when the switch 3 is turned on, the refrigerant before the renewal is provided. Is the R410A refrigerant, and when the switch 4 is turned on, it indicates that the pre-update refrigerant is another refrigerant.
- the recovery operation control means 50C of the control unit 50 opens the second on-off valve 10 during the residual foreign matter recovery operation, closes the second expansion device 6, and updates the connection pipe 39 and the bypass pipe 38 to the capturing section 60.
- the refrigerant is controlled to flow in.
- control unit 50 When the control unit 50 replaces the updated refrigerant, the control unit 50 operates the operating pressure of the updated refrigerant sealed in the refrigerant circuit based on the type of the pre-update refrigerant and the type of the updated refrigerant previously sealed in the refrigerant circuit. Can be determined. That is, the control unit 50 determines the pressure of the updated refrigerant discharged from the compressor 1 based on the information on the type of refrigerant before update received by the acquisition unit 50A, and the pressure determination unit 50E. Compressor control means 50G for controlling the rotational speed of the compressor 1 so as to obtain the determined refrigerant pressure after renewal.
- the pressure determining means 50E is used to determine the pressure of the working refrigerant to be equal to or lower than the pressure resistance of the extension pipe E and extension pipe F to be reused and the indoor units A to D to be reused. With the acquisition means 50A and pressure determination means 50E, the pressure resistance strength of the extension pipe E and extension pipe F to be reused and the indoor units A to D to be reused can be changed only by changing the setting in the same outdoor unit D. The following operations are possible.
- the pressure determination unit 50E includes, for example, a table in which the type of the pre-update refrigerant and the type of the post-update refrigerant correspond to the pressure of the post-update refrigerant discharged from the compressor 1. Using this table, the pressure determining means 50E determines the operating pressure.
- a refrigerant having a high adiabatic index or a refrigerant that is likely to become unstable due to high temperature and high pressure may be used. Therefore, when the high pressure before update input by the terminal 51 is equal to or higher than the preset pressure, or the discharge refrigerant temperature of the compressor 1 is equal to or higher than the preset temperature. Further, it has capacity control means 50F for outputting to the compressor control means 50G so as to reduce the capacity (rotation speed) of the compressor 1.
- the capacity control unit 50F determines whether the high pressure before the update is equal to or higher than a preset pressure based on the detection results of the temperature detection unit 16, the pressure detection unit 13, and the pressure detection unit 15. It is determined whether or not the discharge refrigerant temperature is equal to or higher than a preset temperature.
- the control unit 50 is constituted by a control device such as a microcomputer.
- the control unit 50 has been described as being mounted on the outdoor unit D, but is not limited thereto, and may be mounted on the indoor units A to C, for example.
- the refrigerant containing the refrigerating machine oil discharged from the compressor 1 is separated from the refrigerating machine oil by the oil recovery unit 23, passes through the four-way valve 2, and then the heat source machine side heat exchange is performed. Flows into the vessel 3.
- the refrigerant flowing into the heat source device side heat exchanger 3 is heat-condensed with air to be condensed and liquefied, and further cooled in the first flow path 7A on the cooled side of the inter-refrigerant heat exchanger 7.
- the pressure of a part of the refrigerant cooled in the first flow path 7A is adjusted by the expansion device 27 based on the detected pressure of the pressure detecting means 15.
- the refrigerant that has passed through the expansion device 27 passes through the on-off valve 28 and the extension pipe E, is further depressurized by the first expansion devices 4A to 4C, and flows into the use side heat exchangers 5A to 5C.
- the refrigerant flowing into the use-side heat exchangers 5A to 5C exchanges heat with air to evaporate and flows into the second gas-liquid separator 20 after passing through the extension pipe F, the on-off valve 29, and the four-way valve 2. To do.
- the gas refrigerant returns to the suction side of the compressor 1 through the accumulator 9.
- the remainder of the refrigerant cooled in the first flow path 7A flows into the bypass pipe 38 and gas passes through the second expansion device 6 in the second flow path 7B on the cooling side of the inter-refrigerant heat exchanger 7. And flows into the first gas-liquid separator 21 of the capturing unit 60.
- the refrigerant flowing into the first gas-liquid separator 21 is supplied to the downstream side of the accumulator 9 through the refrigerant return pipe 37A.
- the opening degree of the first expansion devices 4A to 4C is, for example, a constant value (for example, 2 ° C.) where the difference between the temperature detected by the temperature detecting means 19A to 19C and the temperature detected by the temperature detecting means 18A to 18C is constant. It is good to control as follows.
- the second expansion device 6 may be controlled so that the difference between the temperature detection means 17 and the saturation temperature of the pressure detection means 14 becomes a constant numerical value.
- the throttle device 27 is controlled based on the detection result of the pressure detecting means 15, and the target value of the opening is determined according to the pressure value set in step U6 in FIG.
- the refrigerant flowing into the second gas-liquid separator 20 through the four-way valve 2 flows into the bypass pipe 38 from the liquid refrigerant outflow side of the second gas-liquid separator 20 through the connection pipe 39. Then, the liquid refrigerant that has flowed into the bypass pipe 38 flows into the first gas-liquid separator 21 via the second flow path 7B, passes through the opened first on-off valve 11, and the oil recovery device 8. Flow into. Since the refrigerant flowing into the oil recovery unit 8 includes residual foreign matters such as the refrigerating machine oil of the refrigerant before renewal, the residual foreign matters are stored in the oil recovery unit 8. The refrigerant evaporated in the oil recovery unit 8 returns to the suction side of the compressor 1 through the refrigerant return pipe 37B.
- the second on-off valve 10 and the first on-off valve 11 that were normally closed during the cooling operation are opened, while the second expansion device 6 is closed.
- coolant does not flow into the 2nd expansion device 6 with respect to the flow of normal cooling operation.
- the liquid refrigerant separated by the second gas-liquid separator 20 evaporates in the second flow path 7B of the inter-refrigerant heat exchanger 7 through the second on-off valve 10, and becomes a liquid phase or gas-liquid. Two phases.
- the refrigerant that has become a liquid phase or a gas-liquid two phase flows into the oil recovery device 8 through the first on-off valve 11.
- the main part of the capturing unit 60 is a combination of the first gas-liquid separator 21, the first on-off valve 11, and the oil recovery unit 8, and can be produced at low cost.
- the indoor units A to C are set as partial operations. For example, only the indoor unit A of the use side heat exchanger 5A is operated, the first expansion device 4A is fully opened, the first expansion device 4B and the first expansion device 4C are fully closed, and the second expansion device. 6 is fully closed.
- the expansion device 27 has the same opening degree control as in the cooling operation.
- the refrigerant that has exited the expansion device 27 cannot evaporate completely in the use-side heat exchanger 5A, the refrigerant flows into the annular two-phase refrigerant while peeling off the refrigerating machine oil adhering to the pipe, and passes through the four-way valve 2 to the second. To the gas-liquid separator 20.
- the removed foreign matter and liquid refrigerant flow into the second flow path 7 ⁇ / b> B of the inter-refrigerant heat exchanger 7 through the second on-off valve 10.
- the liquid refrigerant having the removed foreign matter slightly evaporates in the second flow path 7B and flows into the first gas-liquid separator 21.
- the liquid refrigerant and residual foreign matter from the first gas-liquid separator 21 flow into the oil recovery unit 8.
- one of the indoor units A to C is operated at regular intervals, and after the indoor units A to C perform the same operation, the cooling operation is performed for a short time, for example, about 20 seconds. .
- the first flow path 7A of the inter-refrigerant heat exchanger 7 is located far from the capturing unit 60. That is, by carrying out this cooling operation, the residual foreign matter convected to the first flow path 7A of the inter-refrigerant heat exchanger 7 can be more reliably recovered in the oil recovery unit 8.
- the compressor 1 is stopped and the second on-off valve 10 and the first on-off valve 11 are closed.
- the height of the second gas-liquid separator 20 is higher than that of the first gas-liquid separator 21 so that the refrigerant flows from the second gas-liquid separator 20 to the second on-off valve 10 side.
- the second gas-liquid separator 20 and the first gas-liquid separator 21 are installed in the outdoor unit D so as to be higher than the vertical position.
- the operating capacities of the indoor units A to C are set so that the refrigerating machine oil attached to the existing facilities such as the extension pipe E and the extension pipe F can be recovered in an annular two-phase flow. .
- the operating capacity of the indoor units A to C is, for example, the number of rotations of the compressor 1, a blower attached to the use side heat exchangers 5A to 5C and supplying air to the use side heat exchangers 5A to 5C ( It can be adjusted by controlling the number of rotations (not shown).
- the refrigerant on the downstream side of the expansion device 27 is less likely to flow in an annular two-phase flow due to the lower outside air temperature, and the refrigerant is less likely to evaporate in the second flow path 7B of the inter-refrigerant heat exchanger 7.
- the on-off valve 24 and the on-off valve 25 are closed to increase the high pressure.
- the on-off valve 24 and the on-off valve 25 are kept open.
- the opening degree of the first expansion devices 4A to 4C may be varied so that the fully opened state and the normal operation opening degree are alternated.
- the refrigerant containing the refrigerating machine oil discharged from the compressor 1 is separated from the refrigerating machine oil by the oil recovery unit 23, passes through the four-way valve 2, the on-off valve 29, and the extension pipe F, and then the use side heat It flows into the exchangers 5A to 5C.
- the refrigerant flowing into the use side heat exchangers 5A to 5C exchanges heat with air to be condensed and liquefied, and then is decompressed by the first expansion devices 4A to 4C to be in a two-phase state.
- the refrigerant in the two-phase state passes through the extension pipe E, the open / close valve 28 that is opened, the expansion device 27 that is fully opened, and the first flow path 7A of the double-pipe heat exchanger, and the heat source side heat exchanger 3 flows into.
- the refrigerant that has flowed into the heat source device side heat exchanger 3 exchanges heat with air to be evaporated and gasified.
- the evaporated gasified refrigerant returns to the suction side of the compressor 1 after passing through the four-way valve 2, the second gas-liquid separator 20 and the accumulator 9.
- the subcooling at the outlets of the use side heat exchangers 5A to 5C can be controlled by controlling the opening degree of the first expansion devices 4A to 4C.
- the subcooling at the outlets of the use side heat exchangers 5A to 5C is a value obtained by subtracting the detected temperature of the temperature detecting means 18A to 18C from the saturation temperature of the detection result of the pressure detecting means 13.
- the opening control of the first expansion devices 4A to 4C on the high pressure side during the heating operation is controlled based on the detection result of the pressure detecting means 13, and the target value of the opening is shown in FIG. It is determined according to the pressure value set in step U6.
- FIG. 6 is a flowchart for explaining processing relating to the setting of whether or not to implement the residual foreign matter recovery operation of the refrigeration cycle apparatus 100 according to Embodiment 1 and the setting of the refrigerant pressure.
- FIG. 7 is a flowchart for explaining processing relating to the implementation of the residual foreign matter recovery operation and the air conditioning operation of the refrigeration cycle apparatus 100 according to the first embodiment.
- FIG. 8 is a flowchart of the residual foreign matter collecting operation of the refrigeration cycle apparatus 100 according to the first embodiment.
- the residual foreign matter recovery operation is performed only when the residual foreign matter recovery flag set according to the refrigerant type input in the flow of FIG. 6 is “Y”.
- a case where the extension pipe E and the extension pipe F of the refrigeration cycle apparatus 100 in which the CFC refrigerant, the HCFC refrigerant, and the like are sealed in the refrigerant circuit and the refrigeration oil for the HCFC refrigerant is used will be described.
- the outdoor unit D and the indoor units A to C are renewed because the mixed refrigerant having R32 is used as the updated refrigerant.
- the indoor units A to C may be reused instead of the extension pipe E and the extension pipe F.
- the extension pipe F and the indoor units A to C may be reused.
- the necessity of cleaning and the pressure setting value are determined in the following flow.
- a service person or the like inputs the refrigerant type before the update at the terminal 51.
- This inputted refrigerant type information is output to the acquisition means 50A (step T1).
- the RWP refrigerant has a GWP of 675, which is smaller than the R410A refrigerant 2090 and can suppress global warming. For this reason, the refrigeration cycle apparatus 100 can ensure safety even when a mixed refrigerant of an R32 refrigerant and a refrigerant with a high adiabatic index or a refrigerant that is likely to become unstable due to high temperature and high pressure can be ensured.
- the operating pressure of the refrigerant in the cycle apparatus 100 is close to the operating pressure of the R410A refrigerant.
- the refrigerating machine oil after the update uses ester oil or ether oil as with the HFC refrigerant.
- coolant the necessity of washing
- the recovery operation determination unit 50B proceeds to step T11. Since it is necessary to perform an operation for collecting residual foreign matter such as refrigeration oil remaining in the existing piping, the recovery operation determination unit 50B sets the residual foreign matter recovery flag to “Y”. Next, the pressure determination unit 50E proceeds to step T12 and sets the pressure setting value to 3.3 MPa.
- the recovery operation determination means 50B proceeds to step T9 when the pre-update refrigerant is R407C refrigerant (step T3). Since the refrigeration oil remaining in the existing pipe is not changed before and after the update, the residual foreign matter recovery operation is unnecessary, and the recovery operation determination unit 50B sets the residual foreign matter recovery flag to “N”, and proceeds to Step T10. In step T10, the pressure determination unit 50E sets the pressure set value to 3.3 MPa.
- step T4 When the refrigerant before update is the R410A refrigerant (step T4), the recovery operation determination unit 50B proceeds to step T7. Since the refrigerating machine oil remaining in the existing piping is not changed before and after the update, the residual foreign matter recovery operation is not required, and the recovery operation determination unit 50B sets the residual foreign matter recovery flag to “N” and proceeds to step T8. . In step T8, the pressure determination unit 50E sets the pressure set value to 4.15 MPa.
- the recovery operation determination unit 50B does not set the “N” and “Y” flags. Instead, the control unit 50 shifts to a mode in which a person determines whether or not cleaning is necessary and directly inputs whether the residual foreign matter recovery flag is set to “N” or “Y” from the outside.
- a key displaying alphabets “N” and “Y” is provided on the terminal 51 so that a serviceman or the like can input. Furthermore, it is easier to understand if a monitor for confirming the input is attached.
- step T6 the person directly inputs the pressure set value according to the characteristics of the refrigerant type before the update.
- the terminal 51 may be provided with a key displaying numbers and a decimal point so that a person can input. If the above setting is completed according to a refrigerant
- step U1 the refrigeration cycle apparatus 100 is powered on and proceeds to step 2.
- step U2 the recovery operation control means 50C confirms the residual foreign matter recovery flag input in accordance with the flow of FIG. 6, and if the residual foreign matter recovery flag is “N”, it proceeds to step 5 on the assumption that no cleaning is necessary, If the residual foreign matter recovery flag is “Y”, the cleaning is necessary and the process proceeds to Step U3.
- Step U3 the recovery operation control means 50C confirms whether or not the residual foreign matter recovery operation has already been completed in the past, and if it has been completed, the process proceeds to Step U5 because no cleaning is necessary, and if not, The process proceeds to step U4 as cleaning is required.
- Step U4 the recovery operation control means 50C receives a signal from a switch or the like corresponding to the start of the residual foreign matter recovery operation, and starts the residual foreign matter recovery operation.
- the residual foreign matter recovery operation residual foreign matters remaining in the existing extension pipe E and extension pipe F are recovered.
- the process proceeds to step U5.
- step U5 the control unit 50 permits the air conditioning operation so that the air conditioning operation can be performed.
- the pressure determination unit 50E receives the permission of the air conditioning operation in Step U5 and confirms the pressure set value (Step U6).
- step U7 the pressure determining unit 50E refers to the table and determines a control target value for pressure according to the set pressure in step U6. This control target value is less than the pressure resistance strength of the existing extension pipe E and extension pipe F.
- step U8 the actual air conditioning operation is enabled in step U8, and the air conditioning operation is started according to the operation command from the remote controller or the like.
- the residual foreign matter recovery operation is started (step S1).
- the recovery operation control means 50C makes the second on-off valve 10 and the first on-off valve 11 open, and the second expansion device 6 closes (step S2).
- the control unit 50 determines the indoor units A to C to be operated (step S3).
- the indoor units A to C may be operated in groups as shown in FIG.
- the group 1 may be the indoor unit A and the indoor unit B
- the group 2 may be the indoor unit C.
- step S4 to S7 After each indoor unit A to C is operated for a certain time (steps S4 to S7), the cooling operation is performed for a short time (step S8). Thus, the residual foreign matter collecting operation is completed (step S9). Thereafter, the control unit 50 stops the compressor 1 (step S10) and closes the second on-off valve 10 and the first on-off valve 11 (step S11).
- the outdoor unit of Patent Document 1 includes a compressor 1, an oil recovery unit 23, a four-way valve 2, an accumulator 9, a heat source unit side heat exchanger 3, a capture unit 60, a refrigerant heat exchanger 7, an on-off valve 28 and an on-off valve 29. And a control unit 50 (see FIG. 12).
- the control unit 50 of Patent Literature 1 cannot switch whether or not the residual foreign matter collecting operation is performed at the time of updating, and performs the residual foreign matter collecting operation even if the refrigerant before and after the update is the same.
- the refrigeration cycle apparatus 100 since the refrigeration cycle apparatus 100 according to the present embodiment includes the control unit 50 that switches whether to perform the residual foreign matter recovery operation according to the refrigerant type before the update, according to the refrigerant type of the existing unit.
- the renewal work can be performed in an appropriate process by determining whether or not the residual foreign matter collecting operation is necessary and not performing the unnecessary residual foreign matter collecting operation.
- inventory management of the outdoor unit D can be simplified, and the unit cost can be reduced by standardizing the outdoor unit D. That is, the work load at the time of construction for updating the refrigeration cycle apparatus 100 can be suppressed.
- the refrigeration cycle apparatus 100 includes an acquisition unit 50A that receives information on the refrigerant type used in the refrigeration cycle apparatus 100, and a recovery operation that determines whether or not a residual foreign matter recovery operation is necessary according to the refrigerant type. Since the determination means 50B is provided, it is possible to easily set the refrigerant type at the site, so that the work can be carried out efficiently.
- the control unit 50 determines that the pressure of the working refrigerant is equal to or less than the pressure resistance of the extension pipe E and extension pipe F to be reused and the indoor units A to D to be reused. Therefore, by simply changing the setting in the same outdoor unit D, the extension pipe E and extension pipe F to be reused and the indoor units A to D to be reused can be operated below the pressure resistance strength. As a result, inventory management of the outdoor unit D can be simplified, and the unit cost can be reduced by standardizing the outdoor unit D.
- the refrigeration cycle apparatus 100 includes an acquisition unit 50A that receives information on the refrigerant type used in the existing facilities before the update, and a pressure determination unit 50E that determines the control pressure according to the refrigerant type. Therefore, it is possible to easily set the refrigerant type at the site, and to make the work of setting the refrigerant type more efficient.
- the acquisition unit 50A of the refrigeration cycle apparatus 100 can be configured such that the input of the refrigerant type can be received as a signal from the outside, and the refrigerant type can be set more efficiently. it can.
- the capture unit 60 can also be configured to be detachable by option setting, and even when the refrigerant type of the existing equipment before the update is different, only the common elements are outdoors. It can be an element of the machine D. For this reason, the refrigeration cycle apparatus 100 according to the present embodiment can reduce the manufacturing cost as much as the cost of the outdoor unit D can be reduced.
- Refrigeration cycle apparatus 100 can suppress global warming because the updated refrigerant is a refrigerant having a GWP value of 1000 or less or a refrigerant having a GWP value of 1000 or less.
- the refrigerating cycle apparatus 100 can suppress global warming because the renewed refrigerant is a mixed refrigerant including an R32 refrigerant having a high GWP suppression effect.
- Capacity control means 50F for reducing the capacity of the compressor was provided. For this reason, even if it uses a refrigerant
- the refrigerant flowing out from the check valve 12 has been described as being supplied between the compressor 1 and the accumulator 9, but the present invention is not limited to this, and the second gas-liquid is not limited thereto. What is necessary is just between the separator 20 and the compressor 1.
- FIG. FIG. 9 is an example of a refrigerant circuit configuration of the refrigeration cycle apparatus 101 according to the second embodiment.
- a refrigeration cycle apparatus 101 according to the second embodiment will be described with reference to FIG.
- the same reference numerals are given to the same components as those in the first embodiment, and differences will be mainly described.
- the pressure detection means 30 provided outside the outdoor unit D is detachable. This is different from the refrigeration cycle apparatus 100 of the first embodiment. That is, the extension pipe E is configured such that the pressure detection means 30 is detachable.
- the pressure detection means 30 is a detachable pressure detection means that can be attached to the updated refrigeration cycle apparatus 101 later.
- Refrigeration cycle apparatus 101 according to the second embodiment has the same effects as refrigeration cycle apparatus 100 according to the first embodiment.
- the set pressure of the refrigeration cycle apparatus 100 is particularly the same before and after the update, and in the extension pipe E and extension pipe F to be reused, and in the indoor units A to C to be reused. If it can be determined that there is no need to change the pressure control, it may be shipped without the pressure detection means 30 attached. And if the pressure setting is made the same as that of the refrigeration cycle apparatus 100 after the update at the site, there is no problem in pressure control.
- the refrigeration cycle apparatus 100 can be operated simply by attaching the pressure detection means 30 as an optional component to the standardized outdoor unit D according to the refrigerant type of the existing unit. For this reason, it is possible to deal with a plurality of refrigerant types used in existing facilities before the update without increasing the types of outdoor units, simplify the inventory management of the outdoor unit D, and standardize the outdoor unit D. This can reduce the unit cost.
- the expansion device 27, the oil recovery device 8 and the like are made optional, depending on the refrigerant type of the existing equipment before the update, as appropriate. It can also be set as the structure added.
- FIG. 10 is an example of a refrigerant circuit configuration of the refrigeration cycle apparatus 102 according to the third embodiment.
- FIG. 11 is an explanatory diagram of a configuration example of the control unit 55 and the like of the refrigeration cycle apparatus 102 according to the third embodiment. Note that in the third embodiment, the same reference numerals are given to configurations common to the first and second embodiments, and differences will be mainly described.
- a bypass pipe 40 is provided instead of the bypass pipe 38, and a capturing part pipe 41 is provided instead of the connection pipe 39. Further, the refrigeration cycle apparatus 102 according to Embodiment 3 is provided with a capturing unit 61 instead of the capturing unit 60.
- the bypass pipe 40 is different from the bypass pipe 38 described in the first embodiment in that the other end is connected between the accumulator 9 and the first gas-liquid separator 20B.
- the capturing part pipe 41 is a pipe connected to the first gas-liquid separator 20 ⁇ / b> B and the oil recovery unit 8.
- the capturing unit 61 is different from the capturing unit 60 described in Embodiment 1 in that it includes the first gas-liquid separator 20B, the first on-off valve 10B, the capturing unit piping 41, and the oil recovery unit 8. ing.
- the recovery operation control means 50C of the control unit 55 closes the second expansion device 6 and opens the first on-off valve 10B as in the first embodiment when performing the residual foreign matter recovery operation.
- the refrigeration cycle apparatus 102 according to the third embodiment has the same effect as the refrigeration cycle apparatus 100 according to the first embodiment.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
実施の形態1.
図1は、本実施の形態1に係る冷凍サイクル装置100の冷媒回路構成の一例である。図2は、本実施の形態1に係る冷凍サイクル装置100に設けられた異物捕捉部の説明図である。図3は、本実施の形態1に係る冷凍サイクル装置100の制御部50などの構成例の説明図である。図1~図3を参照して冷凍サイクル装置100の構成について説明する。
本実施の形態1に係る冷凍サイクル装置100は、冷媒の更新時における作業負荷を抑制することができる改良が加えられたものである。
冷凍サイクル装置100は、利用側である複数の室内機A~Cと、熱源側である室外機Dと、室内機A~Cと室外機Dとを接続する延長配管E及び延長配管Fとを有しているものである。
また、冷凍サイクル装置100は、これらの各種センサの検出結果に基づいて圧縮機1の回転数などを制御する制御部50とを有している。
室内機A~Cには、第1の絞り装置4A~4C及び利用側熱交換器5A~5Cが搭載されている。また、室外機Dには、圧縮機1、アキュムレータ9、油回収器23、四方弁2、熱源機側熱交換器3、第2の気液分離器20、冷媒間熱交換器7、捕捉部60、バイパス配管38、接続配管39、第2の開閉弁10、第1の開閉弁11、開閉弁24、開閉弁25、開閉弁28、開閉弁29、第2の絞り装置6、絞り装置27及び制御部50が搭載されている。そして、室外機Dには、並列に設けられた室内機A~Cが、残留異物回収運転時に熱源機側熱交換器3から流出した冷媒が流れる延長配管E及び延長配管Fを介して接続されている。
圧縮機1は、冷媒を吸入し、その冷媒を圧縮して高温高圧の状態にして吐出するものである。圧縮機1は、冷媒吐出側が油回収器23に接続され、冷媒吸入側が捕捉部60及びアキュムレータ9に接続されている。なお、圧縮機1は、たとえばインバーター圧縮機などで構成するとよい。圧縮機1は、たとえば、アキュムレータ9から流出した冷媒が供給され、たとえば底部に冷凍機油などが貯留される密閉容器、密閉容器に接続された吸入管及び吐出管、密閉容器の内側面に固定された冷媒を圧縮する圧縮機構、及び圧縮機構を駆動するのに利用されるモーター部などで構成されるものである。
アキュムレータ9は、冷媒回路中の余剰冷媒を液冷媒として貯留するものである。アキュムレータ9は、冷媒流入側が第2の気液分離器20のガス側に接続され、冷媒流出側が圧縮機1の吸入側に接続されているものである。
油回収器23は、圧縮機1から吐出された冷凍機油を圧縮機1に戻すのに利用されるものである。油回収器23は、圧縮機1の吐出側と、四方弁2と、圧縮機1の吸入側とに接続されているものである。すなわち、圧縮機1から吐出された冷媒は、油回収器23を通過して四方弁2側に供給され、圧縮機1から吐出された冷凍機油は、油回収器23に接続された油戻し管23Aを介して圧縮機1の吸入側に戻される。
四方弁2は、暖房運転及び冷房運転などの切り換えに用いられるものである。四方弁2は、冷房運転時には圧縮機1の吐出側と熱源機側熱交換器3とを接続するとともに、圧縮機1の吸入側と利用側熱交換器5A~5Cとを接続する。また、四方弁2は、暖房運転時には圧縮機1の吐出側と利用側熱交換器5A~5Cを接続するとともに、圧縮機1の吸入側と熱源機側熱交換器3とを接続する。
熱源機側熱交換器3は、冷房運転時には放熱器として機能し、暖房運転時には蒸発器として機能するものである。熱源機側熱交換器3は、一方側が四方弁2に接続され、他方側が冷媒間熱交換器7に接続されている。熱源機側熱交換器3は、熱交換器3A及び熱交換器3Bとを有するものである。すなわち、冷凍サイクル装置100は、熱交換器3Bにだけ冷媒を供給すること、熱交換器3A及び熱交換器3Bの両方に冷媒を供給すること、を切り換えることができるように2つの熱交換器を有している。熱交換器3Aは、一方側が開閉弁24を介して四方弁2に接続され、他方側が開閉弁25を介して冷媒間熱交換器7に接続されている。
第2の気液分離器20は、冷房運転時には利用側熱交換器5A~5C側から供給される冷媒を液冷媒とガス冷媒とに分離し、暖房運転時には熱源機側熱交換器3側から供給される冷媒を液冷媒とガス冷媒とに分離するものである。また、第2の気液分離器20は、残留異物回収運転時においては利用側熱交換器5A~5C側から供給される冷媒を液冷媒とガス冷媒とに分離する。第2の気液分離器20は、冷媒流入側が四方弁2に接続され、ガス冷媒流出側がアキュムレータ9に接続され、液冷媒流出側が接続配管39の一端側に接続されている。
冷媒間熱交換器7は、第1の絞り装置4A~4Cと熱源機側熱交換器3との間の冷媒配管及びバイパス配管38に接続され、その冷媒配管を流れる冷媒とバイパス配管38を流れる冷媒とを熱交換させるものである。冷媒間熱交換器7としては、たとえば、二重管熱交換器を用いることができる。
冷媒間熱交換器7は、冷媒流路として、第1の流路7A及び第2の流路7Bを有している。すなわち、冷媒間熱交換器7は、第1の流路7Aを流れる冷媒と第2の流路7Bを流れる冷媒とを熱交換させるものである。第1の流路7Aは、一方側が開閉弁25を介して熱源機側熱交換器3に接続され、他方側がバイパス配管38及び絞り装置27に接続されている。第2の流路7Bは、バイパス配管38に接続されているものである。
捕捉部60は、圧縮機1と利用側熱交換器5A~5Cとの間に接続され、冷媒回路に封入された更新後冷媒と冷媒回路に以前封入されていた更新前冷媒に係る残留異物とを分離し、残留異物については貯めることができるものである。ここで、残留異物とは、たとえば、更新前の冷媒の冷凍機油、及び更新前の冷凍機油の劣化物などからなるものである。捕捉部60は、第1の気液分離器21と、第1の開閉弁11と、油回収器8とを有しているものである。
バイパス配管38は、一端側が熱源機側熱交換器3と第1の絞り装置4A~4Cとの間の冷媒配管に接続され、他端側が捕捉部60の第1の気液分離器21に接続されているものである。より詳細には、バイパス配管38の一端側は、冷媒間熱交換器7の第1の流路7Aと絞り装置27との間の冷媒配管に接続されている。バイパス配管38には、第2の絞り装置6及び冷媒間熱交換器7の第2の流路7Bが設けられている。
接続配管39は、一端側が冷房運転時における利用側熱交換器5A~5Cの下流側に接続され、他端側がバイパス配管38に接続されたものである。より詳細には、接続配管39の一端側は、第2の気液分離器20に接続され、他端側がバイパス配管38のうちの第2の絞り装置6と第2の流路7Bとの間に接続されている。接続配管39には、第2の開閉弁10が設けられている。
冷媒戻し管37Bは、一端側が油回収器8に接続され、他端側が圧縮機1の吸入側に接続されているものである。冷媒戻し管37Bには、逆止弁12が設けられており、捕捉部60側から圧縮機1の吸入側へガス冷媒が流れるようになっている。
第2の開閉弁10は、接続配管39に接続されている弁である。第1の開閉弁11は、捕捉部60に設けられている弁である。開閉弁24及び開閉弁25は、熱源機側熱交換器3の熱交換器3Aに接続されている弁である。開閉弁28は、延長配管Eに接続されているものである。開閉弁29は、延長配管Fに接続されているものである。
第1の絞り装置4A~4C、第2の絞り装置6及び絞り装置27は、冷媒を膨張させるために用いられる絞り装置であり、たとえば開度が可変である電子膨張弁、キャピラリーチューブなどで構成することができる。第1の絞り装置4Aは、利用側熱交換器5Aと熱源機側熱交換器3との間に接続されているものである。第1の絞り装置4Bは、利用側熱交換器5Bと熱源機側熱交換器3との間に接続されているものである。第1の絞り装置4Cは、利用側熱交換器5Cと熱源機側熱交換器3との間に接続されているものである。
圧力検出手段13~15は、配管内部の圧力を測定するのに利用されるセンサである。圧力検出手段13~15の圧力検出部は、制御部50に電気的に接続される。たとえば、圧力検出方法としては、圧力検出部に圧力によって可変する抵抗を内蔵し、制御部50にて、その抵抗値を読み取って圧力変換する方法などを採用することができる。
温度検出手段16、温度検出手段17、温度検出手段18A~18C、温度検出手段19A~19C及び温度検出手段22は、配管など測定する部位の表面温度を測定するのに利用されるセンサである。これらの温度検出手段は、センサの先端に検出部が設けられ、制御部50に電気的に接続されている。たとえば、温度検出方法としては、検出部に温度によって可変する抵抗を内蔵し、制御部50にて、その抵抗値を読み取って温度変換する方法などを採用することができる。
制御部50は、上述した圧力検出機構及び温度検出機構の検出結果に基づいて圧縮機1の回転数(運転及び停止含む)、熱源機側熱交換器3及び利用側熱交換器5Aに付設された送風機(図示省略)の回転数(運転及び停止含む)、第2の開閉弁10、第1の開閉弁11、開閉弁24、開閉弁25、開閉弁28、開閉弁29の開閉、第1の絞り装置4A~4C、第2の絞り装置6及び絞り装置27の開度などを制御するものである。制御部50は、更新前冷媒の種類に応じて、捕捉部60に更新後冷媒を流す残留異物回収運転を実施するか否かを切り替えることができるものである。
取得手段50Aは、更新前冷媒の種類及び更新後冷媒の種類の情報を受け付けるものである。取得手段50Aは、たとえばR407Cなどの冷媒の種類の情報を取得する。
回収運転判定手段50Bは、上述した判定を実施するほかに、その判定に対応するフラグを立てる機能を有している。回収運転判定手段50Bは、たとえば、更新前冷媒の種類と更新後冷媒の種類とが完全に同一であれば、残留異物回収運転を実施しない判定をする。また、たとえば更新前冷媒が混合冷媒であれば、成分が一番大きい冷媒に基づいて判定してもよいし、混合冷媒であれば一律に残留物回収運転を実施する判定をしてもよい。
回収運転判定手段50Bは、たとえば、更新前冷媒の種類及び更新後冷媒の種類と、残留異物回収運転の実施の有無とが対応しているテーブルを有している。このテーブルを用いて回収運転判定手段50Bは残留異物回収運転を行うかを決定する。
回収運転制御手段50Cは、第1の開閉弁11及び第2の開閉弁10を開いてから予め設定された時間がたつと、冷房運転を短時間実施し、その後、第1の開閉弁11及び第2の開閉弁10を閉じる。
圧力決定手段50Eは、たとえば、更新前冷媒の種類及び更新後冷媒の種類と、圧縮機1から吐出される更新後冷媒の圧力とが対応しているテーブルを有している。このテーブルを用いて圧力決定手段50Eは動作圧力の決定をする。
まず、図4を参照して冷房運転時の冷媒回路の冷媒の流れを説明する。なお、冷房運転時の冷媒の流れは、図4の実線の矢印で示している。なお、冷房運転時は、第2の絞り装置6は開としているが、第2の開閉弁10及び第1の開閉弁11は閉としている。このため、接続配管39及び油回収器8には冷媒が流れ込まない。
次に、図4を参照して残留異物回収運転時の冷媒回路の冷媒の流れを説明する。なお、冷房運転時の冷媒の流れは、図4の点線の矢印で示している。
残留異物回収運転時においては、第2の開閉弁10及び第1の開閉弁11を開くが、第2の絞り装置6については閉じる。このため、第1の流路7Aを通過した冷媒は、バイパス配管38には流入しない。そのかわりに、四方弁2を通って第2の気液分離器20に流入した冷媒は、第2の気液分離器20の液冷媒流出側から接続配管39を介してバイパス配管38に流れ込む。そして、バイパス配管38に流れこんだ液冷媒は、第2の流路7Bを介して第1の気液分離器21に流れ込み、開かれた第1の開閉弁11を通過して油回収器8に流入する。この油回収器8に流れ込む冷媒は、更新前の冷媒の冷凍機油などからなる残留異物を含んでいるため、残留異物については油回収器8に貯留される。油回収器8で気化した冷媒は、冷媒戻し管37Bを介して圧縮機1の吸入側に戻る。
残留異物回収運転中は、室内機A~Cの運転を部分運転とする。たとえば、利用側熱交換器5Aの室内機Aのみの運転をし、第1の絞り装置4Aは全開、第1の絞り装置4B及び第1の絞り装置4Cは全閉とし、第2の絞り装置6は全閉とする。なお、絞り装置27は、冷房運転時と同様の開度制御とする。この場合、絞り装置27を出た冷媒は、利用側熱交換器5Aで蒸発しきれないため、環状二相冷媒となって配管に付着した冷凍機油を剥がしながら流、四方弁2を経て第2の気液分離器20へ達する。
図5を参照して暖房運転時の冷媒回路の冷媒の流れを説明する。なお、暖房運転時の冷媒の流れは、図5の点線の矢印で示している。なお、暖房運転時は、第2の絞り装置6、第2の開閉弁10及び第1の開閉弁11は閉としている。このため、バイパス配管38、接続配管39及び油回収器8には冷媒が流れ込まない。
図6は、本実施の形態1に係る冷凍サイクル装置100の残留異物回収運転を実施するか否かの設定及び冷媒圧力の設定に関する処理を説明するプロ-チャートである。図7は、本実施の形態1に係る冷凍サイクル装置100の残留異物回収運転及び空調運転の実施に関する処理を説明するフローチャートである。図8は、本実施の形態1に係る冷凍サイクル装置100の残留異物回収運転のフローチャートである。図6~図8を参照して、延長配管E及び延長配管Fなどに残る残留異物を回収することができる残留異物回収運転などの動作について説明する。
冷凍サイクル装置100を更新するための施工時において、サービスマンなどが端末51にて更新前の冷媒種を入力する。この入力した冷媒種の情報は取得手段50Aに出力される(ステップT1)。ここで、更新前の冷媒種の候補として、R22冷媒、R407C冷媒、R410A冷媒及びその他の冷媒があり、更新後の冷媒にはR32冷媒を有する混合冷媒を使うものとする。
R32冷媒のGWPは675であり、R410A冷媒の2090に対して小さく、地球温暖化を抑制できる冷媒である。このため、冷凍サイクル装置100は、R32冷媒と、断熱指数の高い冷媒や高温、高圧化で不安定となりやすい冷媒との混合冷媒を使用したとしても、安全性を確保することができると共に、冷凍サイクル装置100の冷媒の動作圧力はR410A冷媒の動作圧力に近くなる。
そして、ステップT6では、圧力設定値を更新前の冷媒種の特性に応じて、人が直接、入力するようにする。ここで、端末51には、数字と小数点を表示したキーを設け、人が入力できるようにしておくとよい。以上の設定を冷媒種に応じて完了したら、制御部50は、ステップ13に進み、冷媒種の設定を完了する。
冷凍サイクル装置100を更新するときにおいて、残留異物回収フラグが「Y」の場合には、残留異物回収運転を開始する(ステップS1)。回収運転制御手段50Cは、第2の開閉弁10及び第1の開閉弁11を開いた状態とし、第2の絞り装置6は閉じた状態とする(ステップS2)。次に、制御部50は、運転する室内機A~Cを決定する(ステップS3)。なお、上記では、室内機A~Cを1台ずつ運転する場合を例に説明したが、図8に示すようにグループに分けて運転してもよい。たとえば、グループ1を室内機A及び室内機Bとし、グループ2を室内機Cとしてもよい。
残留異物回収運転を実施することができる特許文献1の室外機と対比する。特許文献1の室外機は、圧縮機1、油回収器23、四方弁2、アキュムレータ9、熱源機側熱交換器3、捕捉部60、冷媒間熱交換器7、開閉弁28及び開閉弁29、制御部50などを有している(図12参照)。特許文献1の制御部50は、更新時には残留異物回収運転を実施するか否かを切り替えることができるものではなく、更新前後の冷媒が同一でも残留異物回収運転を実施してしまうものである。
一方、本実施の形態に係る冷凍サイクル装置100は、更新前の冷媒種類に応じて、残留異物回収運転を実行するかどうかを切り替える制御部50を備えたので、既設ユニットの冷媒種に応じて、残留異物回収運転の要否を決定し、不必要な残留異物回収運転を実施しないことで、適正な工程で更新工事を実施することができる。
また、室外機Dの在庫管理を簡単化できると共に、室外機Dを標準化することでユニットコストも下げることができる。すなわち、冷凍サイクル装置100の更新のための施工時における作業負荷を抑制することができる。
図9は、本実施の形態2に係る冷凍サイクル装置101の冷媒回路構成の一例である。図9を参照して本実施の形態2に係る冷凍サイクル装置101について説明する。なお、実施の形態2では、実施の形態1と共通する構成については同一符号を付し、相違点について中心に説明する。
図10は、本実施の形態3に係る冷凍サイクル装置102の冷媒回路構成の一例である。図11は、本実施の形態3に係る冷凍サイクル装置102の制御部55などの構成例の説明図である。なお、実施の形態3では、実施の形態1、2と共通する構成については同一符号を付し、相違点について中心に説明する。
Claims (12)
- 圧縮機、熱源機側熱交換器、第1の絞り装置、及び利用側熱交換器を有し、これらが冷媒配管で接続されて構成された冷媒回路と、
前記圧縮機と前記利用側熱交換器との間に接続され、前記冷媒回路内の冷媒と残留異物とを分離する捕捉部と、
更新前の冷媒の種類及び更新後の冷媒の種類に応じて、前記捕捉部に前記更新後の冷媒を流す残留異物回収運転を実施するか否かを切り替える制御部と、
を有し、
前記捕捉部は、
前記捕捉部の流路に設けられた第1の開閉弁を有し、
前記制御部は、
前記更新前の冷媒の種類及び前記更新後の冷媒の種類の情報を受け付ける取得手段と、
前記取得手段の受け付けた前記更新前の冷媒の種類及び前記更新後の冷媒の種類の情報に基づいて、前記残留異物を回収するか否かを判定する回収運転判定手段と、
前記回収運転判定手段が前記更新後の冷媒を前記冷媒回路に循環させると判定した場合に、前記第1の開閉弁を開く回収運転制御手段とを有する冷凍サイクル装置。 - 前記捕捉部は、
ガス冷媒流出側が前記圧縮機と前記利用側熱交換器との間に接続され、前記更新後の冷媒を気液分離する第1の気液分離器と、
前記第1の気液分離器の液冷媒流出側に接続され、前記更新後の冷媒と前記更新前の冷媒に係る残留異物とを分離する油回収器とをさらに有し、
前記第1の開閉弁は、
前記油回収器と前記第1の気液分離器との間に設けられている請求項1に記載の冷凍サイクル装置。 - 一端側が前記熱源機側熱交換器と前記第1の絞り装置との間に接続され、他端側が前記捕捉部の前記第1の気液分離器の冷媒流入側に接続されたバイパス配管と、
一端側が冷房運転時における前記利用側熱交換器の下流側に接続され、他端側が前記バイパス配管に接続された接続配管とをさらに有する請求項1又は2に記載の冷凍サイクル装置。 - 前記第1の絞り装置と前記熱源機側熱交換器との間の前記冷媒配管及び前記バイパス配管に接続され、前記冷媒配管を流れる冷媒と前記バイパス配管を流れる冷媒とを熱交換させる冷媒間熱交換器と、
前記バイパス配管のうちの前記冷媒間熱交換器よりも上流側に接続された第2の絞り装置と、
前記接続配管の前記一端側に接続され、冷媒を気液分離する第2の気液分離器と、
前記接続配管に設けられた第2の開閉弁とをさらに有する請求項3に記載の冷凍サイクル装置。 - 前記回収運転制御手段は、
前記残留異物回収運転時に前記第2の開閉弁を開き、前記第2の絞り装置を閉じ、前記接続配管及び前記バイパス配管から前記捕捉部に前記更新後の冷媒を流入させるように制御する請求項4に記載の冷凍サイクル装置。 - 前記回収運転判定手段は、
前記更新前の冷媒の種類と前記更新後の冷媒の種類とが同一なら前記残留異物回収運転を実施しない判定をする請求項1~5のいずれか一項に記載の冷凍サイクル装置。 - 前記更新後の冷媒は、GWP値が1000以下の冷媒もしくはGWP値が1000以下の冷媒を含む冷媒である請求項1~6のいずれか一項に記載の冷凍サイクル装置。
- 圧縮機、熱源機側熱交換器、第1の絞り装置、及び利用側熱交換器を有し、これらを冷媒配管で接続されて構成された冷媒回路と、
更新後の冷媒を入れ替える際に、前記冷媒回路に以前封入されていた更新前の冷媒の種類及び更新後の冷媒の種類に応じて前記冷媒回路に封入された前記更新後の冷媒の動作圧力を決定する制御部と、
を有する冷凍サイクル装置。 - 前記圧縮機の吐出側の圧力を検出する圧力検出手段と、
前記圧縮機の吐出側の温度を検出する温度検出手段とをさらに有し、
前記制御部は、
高圧が予め設定された圧力以上となるか、又は、前記圧縮機の吐出冷媒温度が予め設定された温度以上となった場合には、圧縮機の容量を下げる容量制御手段を有する請求項8に記載の冷凍サイクル装置。 - 前記圧縮機、前記熱源機側熱交換器を有する室外機と、
前記利用側熱交換器を有する室内機と、
前記室外機と前記室内機とを接続し、前記残留異物回収運転時に前記熱源機側熱交換器から流出した冷媒が流れる延長配管と、
前記延長配管に着脱自在に設けられている着脱式圧力検出手段とを有する請求項1~9のいずれか一項に記載の冷凍サイクル装置。 - 前記捕捉部は、
前記冷媒回路に着脱自在に設けられている請求項1~10のいずれか一項に記載の冷凍サイクル装置。 - 前記制御部は、
前記更新前の冷媒の種類及び前記更新後の冷媒の種類の情報を受け付ける取得手段と、
前記更新前の冷媒の種類及び更新後の冷媒の種類と、前記圧縮機から吐出される前記更新後の冷媒の圧力とが対応しているテーブルを有する圧力決定手段とを有する請求項8に記載の冷凍サイクル装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2014/054031 WO2015125252A1 (ja) | 2014-02-20 | 2014-02-20 | 冷凍サイクル装置 |
JP2016503836A JP6022107B2 (ja) | 2014-02-20 | 2014-02-20 | 冷凍サイクル装置 |
GB1610806.0A GB2537766B (en) | 2014-02-20 | 2014-02-20 | Refrigeration cycle apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2014/054031 WO2015125252A1 (ja) | 2014-02-20 | 2014-02-20 | 冷凍サイクル装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015125252A1 true WO2015125252A1 (ja) | 2015-08-27 |
Family
ID=53877787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/054031 WO2015125252A1 (ja) | 2014-02-20 | 2014-02-20 | 冷凍サイクル装置 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP6022107B2 (ja) |
GB (1) | GB2537766B (ja) |
WO (1) | WO2015125252A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018146719A1 (ja) * | 2017-02-07 | 2018-08-16 | 三菱電機株式会社 | 冷凍サイクル装置 |
CN108534410A (zh) * | 2018-03-26 | 2018-09-14 | 广州西奥多科技有限公司 | 一种智能型热泵的除霜控制方法 |
JP2019196843A (ja) * | 2018-05-07 | 2019-11-14 | デンゲン株式会社 | 冷媒回収充填装置及びその誤接続防止機構 |
WO2022208727A1 (ja) * | 2021-03-31 | 2022-10-06 | 三菱電機株式会社 | 冷凍サイクル装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03186157A (ja) * | 1989-12-14 | 1991-08-14 | Daikin Ind Ltd | 圧縮機の吐出管温度制御装置 |
JP2011117668A (ja) * | 2009-12-03 | 2011-06-16 | Mitsubishi Electric Corp | 空気調和装置、および空気調和装置の洗浄運転方法 |
JP2012047392A (ja) * | 2010-08-26 | 2012-03-08 | Toshiba Carrier Corp | 熱源ユニット |
JP2013257088A (ja) * | 2012-06-13 | 2013-12-26 | Daikin Industries Ltd | 冷凍装置 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4391559B2 (ja) * | 2007-11-09 | 2009-12-24 | 三菱電機株式会社 | 冷凍冷蔵装置用冷媒回路の冷媒変更方法及び冷凍冷蔵装置 |
-
2014
- 2014-02-20 GB GB1610806.0A patent/GB2537766B/en active Active
- 2014-02-20 WO PCT/JP2014/054031 patent/WO2015125252A1/ja active Application Filing
- 2014-02-20 JP JP2016503836A patent/JP6022107B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03186157A (ja) * | 1989-12-14 | 1991-08-14 | Daikin Ind Ltd | 圧縮機の吐出管温度制御装置 |
JP2011117668A (ja) * | 2009-12-03 | 2011-06-16 | Mitsubishi Electric Corp | 空気調和装置、および空気調和装置の洗浄運転方法 |
JP2012047392A (ja) * | 2010-08-26 | 2012-03-08 | Toshiba Carrier Corp | 熱源ユニット |
JP2013257088A (ja) * | 2012-06-13 | 2013-12-26 | Daikin Industries Ltd | 冷凍装置 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018146719A1 (ja) * | 2017-02-07 | 2018-08-16 | 三菱電機株式会社 | 冷凍サイクル装置 |
JPWO2018146719A1 (ja) * | 2017-02-07 | 2019-08-08 | 三菱電機株式会社 | 冷凍サイクル装置 |
GB2573891A (en) * | 2017-02-07 | 2019-11-20 | Mitsubishi Electric Corp | Refrigeration cycle device |
GB2573891B (en) * | 2017-02-07 | 2021-02-10 | Mitsubishi Electric Corp | Refrigeration cycle apparatus |
CN108534410A (zh) * | 2018-03-26 | 2018-09-14 | 广州西奥多科技有限公司 | 一种智能型热泵的除霜控制方法 |
CN108534410B (zh) * | 2018-03-26 | 2020-07-31 | 广州西奥多科技有限公司 | 一种智能型热泵的除霜控制方法 |
JP2019196843A (ja) * | 2018-05-07 | 2019-11-14 | デンゲン株式会社 | 冷媒回収充填装置及びその誤接続防止機構 |
JP7045624B2 (ja) | 2018-05-07 | 2022-04-01 | デンゲン株式会社 | 冷媒回収充填装置及びその誤接続防止機構 |
WO2022208727A1 (ja) * | 2021-03-31 | 2022-10-06 | 三菱電機株式会社 | 冷凍サイクル装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2015125252A1 (ja) | 2017-03-30 |
GB201610806D0 (en) | 2016-08-03 |
GB2537766A (en) | 2016-10-26 |
GB2537766B (en) | 2020-02-19 |
JP6022107B2 (ja) | 2016-11-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2008215697A (ja) | 空気調和装置 | |
KR20160028400A (ko) | 공기 조화기 및 그 제어방법 | |
JP6022107B2 (ja) | 冷凍サイクル装置 | |
US10598413B2 (en) | Air-conditioning apparatus | |
JP5762441B2 (ja) | 冷凍サイクル装置 | |
JP4120221B2 (ja) | 冷媒及び油回収運転方法、および、冷媒及び油の回収制御装置 | |
JP4289901B2 (ja) | 空気調和装置の油回収方法及び空気調和装置 | |
JP2002357377A (ja) | 配管洗浄装置および配管洗浄方法 | |
JP4420871B2 (ja) | 冷凍空調装置 | |
JP6361258B2 (ja) | 冷凍装置 | |
JP2004293986A (ja) | 接続配管の洗浄方法及び冷凍装置の更新方法 | |
JP6391825B2 (ja) | 冷凍サイクル装置 | |
JP2005049057A (ja) | 冷凍サイクル装置 | |
JP4803234B2 (ja) | 配管洗浄装置 | |
JP2003021436A (ja) | 配管洗浄方法、空気調和機の更新方法及び空気調和機 | |
JP4279080B2 (ja) | 冷凍空調装置及びその更新方法 | |
JP5583134B2 (ja) | 熱源側ユニット及び冷凍空気調和装置 | |
JP4186764B2 (ja) | 冷凍装置 | |
JP2005233505A (ja) | 配管洗浄方法および配管洗浄装置 | |
JP5574638B2 (ja) | 冷凍空調装置 | |
JPWO2018146719A1 (ja) | 冷凍サイクル装置 | |
JP4295136B2 (ja) | 配管洗浄装置および配管洗浄方法 | |
JP2013024505A (ja) | 冷凍サイクル装置 | |
JPWO2005052472A1 (ja) | 冷凍装置 | |
JP2010185585A (ja) | 空気調和装置及びユニットの更新方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14883314 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2016503836 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 201610806 Country of ref document: GB Kind code of ref document: A Free format text: PCT FILING DATE = 20140220 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 14883314 Country of ref document: EP Kind code of ref document: A1 |