CN102077042B - Method for judging amount of refrigerant of air conditioner and air conditioner - Google Patents
Method for judging amount of refrigerant of air conditioner and air conditioner Download PDFInfo
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- CN102077042B CN102077042B CN2009801248092A CN200980124809A CN102077042B CN 102077042 B CN102077042 B CN 102077042B CN 2009801248092 A CN2009801248092 A CN 2009801248092A CN 200980124809 A CN200980124809 A CN 200980124809A CN 102077042 B CN102077042 B CN 102077042B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
- F25B2313/0313—Pressure sensors near the outdoor heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
- F25B2313/0315—Temperature sensors near the outdoor heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/19—Calculation of parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/19—Refrigerant outlet condenser temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/21—Refrigerant outlet evaporator temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/04—Refrigerant level
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2104—Temperatures of an indoor room or compartment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2106—Temperatures of fresh outdoor air
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The detection errors are reduced by making controls so that the degree of overcooling used as an index and a conversion value based on the degree of overcooling can be values used to easily judge the amount of refrigerant. A method is for judging the amount of refrigerant of an air conditioner (1) including a refrigerant circuit (10). The refrigerant circuit (10) comprises a heat source unit (2) having a compressor (21), a heat-source-side heat exchanger (23), and a cooling heat source regulating means (27), a use unit (4) having a use-side heat exchanger (41), an expansion mechanism (33), a liquid refrigerant communication pipe (6), and a gas refrigerant communication pipe (7). The air conditioner (1) can perform at least a cooling operation. It is judged by the method whether or not the amount of refrigerant in the refrigerant circuit is adequate. The compressor frequency, the degree of overheating, and the degree of overcooling in a stable state in which the degree of overcooling is above a first predetermined value are stored. After a predetermined period of time, the degree of overcooling of the refrigerant is determined while controls are being made so that the compressor frequency and the degree of overheating are the stored ones. The determined degree of overcooling is compared with the stored one, and it is judged whether or not the amount of refrigerant in the refrigerant circuit is adequate.
Description
Technical field
The present invention relates to function that whether refrigerant amount in the refrigerant loop that is filled in conditioner is suitably judged, relate in particular to and be communicated with the function whether refrigerant amount in the refrigerant loop of pipe arrangement is connected heat source unit with range site conditioner is suitably judged to being filled in via cold-producing medium.
Background technology
At present, known have a kind of carrying out to judge the such conditioner of patent documentation 1 (Japanese Patent Laid-Open 2006-23072 communique) that the determining amount of refrigerant of refrigerant amount turns round according to the degree of supercooling of condenser.In the such technology of patent documentation 1 (Japanese Patent Laid-Open 2006-23072 communique), conditioner is first (for example, when the arranging of conditioner) and termly (for example, when arranging each year etc.) carry out the determining amount of refrigerant running.In this determining amount of refrigerant running, the degree of superheat and the evaporating pressure controlled to make evaporimeter in the cooling operation state become constant, and the degree of supercooling of condenser is measured.In addition, in the determining amount of refrigerant running, measure the degree of supercooling that obtains according to this moment and judge with the difference of degree of supercooling first or that measure before it whether cold-producing medium leaks.
Disclosure of an invention
Invent technical problem to be solved
Yet, in patent documentation 1 such refrigrant leakage that appends the conditioner of filling cold-producing medium detects, necessarily control by carrying out the degree of superheat, can automatically guarantee to a certain extent the degree of supercooling of the cold-producing medium at heat source side heat exchanger outlet place, but do not supposing that substantially having cold-producing medium to append fills in such conditioner, the filling refrigerant amount may significantly change with respect to the circuit volume of refrigerant loop, when the conditioner of putting down in writing with patent documentation 1 (Japanese Patent Laid-Open 2006-23072 communique) carries out the degree of superheat when necessarily controlling in the same manner, perhaps, reference index (for example, degree of supercooling etc.) can not be guaranteed larger value fully.
Technical problem of the present invention is that by controlling, the scaled value that the degree of supercooling that making becomes basic index reaches based on degree of supercooling becomes the whether suitable value of easy judgement refrigerant amount, detects error thereby reduce.
The technical scheme that the technical solution problem adopts
The method of determining amount of refrigerant of the conditioner that the first invention is related is the whether suitable method of determining amount of refrigerant of refrigerant amount of judging in having the conditioner of refrigerant loop in the refrigerant loop, wherein, above-mentioned refrigerant circuit comprises: the heat source unit with compressor, heat source side heat exchanger, expansion mechanism and the fluid reservoir that can regulate the running consumption; Has the range site that utilizes the side heat exchanger; And the connection heat source unit is communicated with pipe arrangement and gas refrigerant connection pipe arrangement with the liquid refrigerant of range site, above-mentioned refrigerant loop can make at least the heat source side heat exchanger work as the condenser of compressed cold-producing medium in compressor and make the cooling operation that utilizes the side heat exchanger to work as the evaporimeter of the cold-producing medium that is condensed in the heat source side heat exchanger, and above-mentioned method of determining amount of refrigerant comprises initial stage running step, storing step, turn round transfer step, stable state reproduced suitably determination step whether of step, refrigerant amount usually.In the step that turns round in the early stage, carry out cooling operation from the common operation mode of the control of each equipment of carrying out heat source unit and range site according to the running load of range site, control expansion mechanism so that utilize the degree of superheat of the cold-producing medium at side heat exchanger outlet place become on the occasion of, and detect the degree of supercooling of cold-producing medium at heat source side heat exchanger outlet place or the operating condition amount that changes according to the change of degree of supercooling, be that the above or operating condition amount of the first setting is the above stable state of the second setting amount thereby make refrigerant loop be in degree of supercooling.In storing step, the frequency of the compressor under the stable state is stored as first frequency, the degree of superheat of the cold-producing medium that utilizes side heat exchanger outlet place under the stable state is stored as first degree of superheat, and the degree of supercooling under the stable state or operating condition amount are stored as the first desired value.In the transfer step that usually turns round, after storing step finishes, refrigerant loop is switched towards common operation mode again.Reproduce in the step in stable state, after passing through specified time limit from common running transfer step, carry out the control of compressor so that the frequency of compressor becomes the first frequency that is stored the step storage, and carry out the control of expansion mechanism so that the degree of superheat becomes first degree of superheat, and detect heat source side heat exchanger outlet place cold-producing medium degree of supercooling or be used as detected value according to the operating condition amount that the change of degree of supercooling changes.At refrigerant amount suitably whether in the determination step, Comparative indices value and detected value, with judgement be filled in the refrigerant loop refrigerant amount suitably whether.
In the present invention, control compressor and utilize the degree of superheat of the cold-producing medium at side heat exchanger outlet place, be in more than initial stage running predefined the first setting of step (situation of degree of supercooling) or more than the second setting (situation of operating condition amount) so that be used for judging the whether suitable desired value of refrigerant amount, the frequency of the compressor of (stable state) is stored as first frequency at this moment, and the degree of superheat of the cold-producing medium that utilizes side heat exchanger outlet place of (stable state) is stored as first degree of superheat at this moment, in addition, also degree of supercooling or the operating condition amount of (stable state) are stored as the first desired value at this moment.In addition, reproduce the step in the stable state of after the later step of common running begins through specified time limit, carrying out, with the FREQUENCY CONTROL of compressor at first frequency, and will utilize the degree of superheat of the cold-producing medium at side heat exchanger outlet place to be controlled at first degree of superheat, the degree of supercooling or the operating condition amount that detect this moment are used as detected value, at refrigerant amount suitably whether in the determination step, Comparative indices value and detected value, with judgement be filled in the refrigerant loop refrigerant amount suitably whether.
Like this, in the step that turns round in the early stage, owing to preseting for judging the whether suitable index that adopts of refrigerant amount, in the situation that adopts degree of supercooling, to be more than the first setting, in the situation that adopts the operating condition amount, be more than the second setting, therefore, even do not supposing that substantially having cold-producing medium to append fills in such conditioner, also can judge that refrigerant amount suitably guarantees that degree of supercooling or operating condition amount are a certain more values whether the time, in the situation that refrigerant amount reduces, detect easily these values and diminish, thereby can reduce the decision errors of refrigerant amount.
The cold-producing medium decision method of the conditioner that the second invention is related is in the method for determining amount of refrigerant of the related conditioner of the first invention, and the first setting is the above suitable value of size that can judge the degree of supercooling of refrigrant leakage.In addition, the second setting is the above suitable value of size that can judge the operating condition amount of refrigrant leakage.
Therefore, even substantially do not supposing have cold-producing medium to append in the conditioner of filling, also can judge that refrigerant amount suitably guarantees that degree of supercooling or operating condition amount are a certain more values whether the time, in the situation that refrigerant amount reduces, detect easily these values and diminish, thereby can reduce the decision errors of refrigerant amount.
The related conditioner of the 3rd invention comprises suitably decision maker whether of refrigerant loop, initial stage rotating device, storage device, stable state transcriber and refrigerant amount.Refrigerant loop comprises that heat source unit, range site, liquid refrigerant are communicated with pipe arrangement and gas refrigerant is communicated with pipe arrangement.Heat source unit has compressor, heat source side heat exchanger, expansion mechanism and the fluid reservoir that can regulate the running consumption.Range site has the side of utilization heat exchanger.Liquid refrigerant is communicated with pipe arrangement and gas refrigerant is communicated with pipe arrangement connection heat source unit and range site.In addition, refrigerant loop can make at least the heat source side heat exchanger work as the condenser of compressed cold-producing medium in compressor and make the cooling operation that utilizes the side heat exchanger to work as the evaporimeter of the cold-producing medium that is condensed in the heat source side heat exchanger.The initial stage rotating device carries out cooling operation from the common operation mode of the control of each equipment of carrying out heat source unit and range site according to the running load of range site, control expansion mechanism so that utilize the degree of superheat of the cold-producing medium at side heat exchanger outlet place become on the occasion of, and detect the degree of supercooling of cold-producing medium at heat source side heat exchanger outlet place or the operating condition amount that changes according to the change of degree of supercooling, be that the above or operating condition amount of the first setting is the above stable state of the second setting amount thereby make refrigerant loop be in degree of supercooling.Storage device is stored the frequency of the compressor under the stable state as first frequency, the degree of superheat of the cold-producing medium that utilizes side heat exchanger outlet place under the stable state is stored as first degree of superheat, and the degree of supercooling under the stable state or operating condition amount are stored as the first desired value.Usually the running transfer device switches refrigerant loop after storing step finishes again towards common operation mode.The stable state transcriber is after passing through specified time limit from common running transfer step, carry out the control of compressor so that the frequency of compressor becomes the first frequency that is stored the step storage, and carry out the control of expansion mechanism so that the degree of superheat becomes first degree of superheat, and detect heat source side heat exchanger outlet place cold-producing medium degree of supercooling or be used as detected value according to the operating condition amount that the change of degree of supercooling changes.Refrigerant amount is whether decision maker Comparative indices value and detected value suitably, with judgement be filled in the refrigerant loop refrigerant amount suitably whether.
In the present invention, control compressor and utilize the degree of superheat of the cold-producing medium at side heat exchanger outlet place, be in more than initial stage running predefined the first setting of step (situation of degree of supercooling) or more than the second setting (situation of operating condition amount) so that be used for judging the whether suitable desired value of refrigerant amount, the frequency of the compressor of (stable state) is stored as first frequency at this moment, and the degree of superheat of the cold-producing medium that utilizes side heat exchanger outlet place of (stable state) is stored as first degree of superheat at this moment, in addition, also degree of supercooling or the operating condition amount of (stable state) are stored as the first desired value at this moment.In addition, reproduce the step in the stable state of after the later step of common running begins through specified time limit, carrying out, with the FREQUENCY CONTROL of compressor at first frequency, and will utilize the degree of superheat of the cold-producing medium at side heat exchanger outlet place to be controlled at first degree of superheat, the degree of supercooling or the operating condition amount that detect this moment are used as detected value, at refrigerant amount suitably whether in the determination step, Comparative indices value and detected value, with judgement be filled in the refrigerant loop refrigerant amount suitably whether.
Like this, in the step that turns round in the early stage, owing to preseting for judging the whether suitable index that adopts of refrigerant amount, in the situation that adopts degree of supercooling, to be more than the first setting, in the situation that adopts the operating condition amount, be more than the second setting, therefore, even do not supposing that substantially having cold-producing medium to append fills in such conditioner, also can judge that refrigerant amount suitably guarantees that degree of supercooling or operating condition amount are a certain more values whether the time, in the situation that refrigerant amount reduces, detect easily these values and diminish, thereby can reduce the decision errors of refrigerant amount.
The invention effect
In the method for determining amount of refrigerant of the related conditioner of the first invention, in the step that turns round in the early stage, owing to preseting for judging the whether suitable index that adopts of refrigerant amount, in the situation that adopts degree of supercooling, to be more than the first setting, in the situation that adopts the operating condition amount, be more than the second setting, therefore, even do not supposing that substantially having cold-producing medium to append fills in such conditioner, also can judge that refrigerant amount suitably guarantees that degree of supercooling or operating condition amount are a certain more values whether the time, in the situation that refrigerant amount reduces, detect easily these values and diminish, thereby can reduce the decision errors of refrigerant amount.
In the method for determining amount of refrigerant of the related conditioner of the second invention, even substantially do not supposing have cold-producing medium to append in the conditioner of filling, can guarantee when whether refrigerant amount is suitably judged that also degree of supercooling or operating condition amount are a certain more values, in the situation that refrigerant amount reduces, detect easily these values and diminish, thereby can reduce the decision errors of refrigerant amount.
In the related conditioner of the 3rd invention, in the step that turns round in the early stage, owing to preseting for judging the whether suitable index that adopts of refrigerant amount, in the situation that adopts degree of supercooling, to be more than the first setting, in the situation that adopts the operating condition amount, be more than the second setting, therefore, even do not supposing that substantially having cold-producing medium to append fills in such conditioner, also can judge that refrigerant amount suitably guarantees that degree of supercooling or operating condition amount are a certain more values whether the time, in the situation that refrigerant amount reduces, detect easily these values and diminish, thereby can reduce the decision errors of refrigerant amount.
Description of drawings
Fig. 1 is the summary refrigerant loop figure of the conditioner of an embodiment of the present invention.
Fig. 2 is the schematic diagram that is illustrated in the state of the cold-producing medium that flows in the refrigerant loop of cooling operation.
Fig. 3 is the flow chart of initial setting running.
Fig. 4 is the schematic diagram that is illustrated in the state of the cold-producing medium that flows in the refrigerant loop of determining amount of refrigerant operation mode (initial setting running and judgement running).
Fig. 5 is the flow chart of judging running.
Fig. 6 be the expression outdoor temperature Ta corresponding with the outdoor fan air quantity when constant condensation temperature Tc and the chart of outdoor heat converter outlet temperature Tl.
Fig. 7 is the chart of the distribution of the expression degree of supercooling value corresponding with the outdoor fan air quantity.
Fig. 8 is the chart of the distribution of the expression relative degree of supercooling value corresponding with the outdoor fan air quantity.
The specific embodiment
Below, with reference to the accompanying drawings the embodiment of conditioner of the present invention described.
(1) structure of conditioner
Fig. 1 is the summary refrigerant loop figure of the conditioner 1 of an embodiment of the present invention.Conditioner 1 is the device that turns round to carry out the indoor cooling and warming of high building etc. by the kind of refrigeration cycle of carrying out steam compression type.Conditioner 1 mainly comprises: an outdoor unit 2; Indoor unit 4; And connection outdoor unit 2 is communicated with pipe arrangement 6 and gas refrigerant connection pipe arrangement 7 with the liquid refrigerant of indoor unit 4.That is, the refrigerant loop 10 of the steam compression type of the conditioner 1 of present embodiment consists of by connecting outdoor unit 2, indoor unit 4, liquid refrigerant connection pipe arrangement 6 and gas refrigerant connection pipe arrangement 7.
(indoor unit)
Modes such as the indoor ceiling by imbedding or hang on high building etc. or indoor unit 4 is set by hanging over the first-class mode of indoor wall.Indoor unit 4 is communicated with pipe arrangement 6 via liquid refrigerant and gas refrigerant connection pipe arrangement 7 is connected with outdoor unit 2, consists of the part of refrigerant loop 10.
Then, the structure of indoor unit 4 described.
Indoor unit 4 mainly has the indoor refrigerant loop 11 of a part that consists of refrigerant loop 10.This indoor refrigerant loop 11 mainly has as the indoor heat converter 41 that utilizes the side heat exchanger.
In the present embodiment, indoor heat converter 41 is the finned fin-tube heat exchangers of intersection that are made of heat pipe and many fins, be when cooling operation, to work as the evaporimeter of cold-producing medium and room air is cooled off, when heating running, work as the condenser of cold-producing medium and heat exchanger that room air is heated.In the present embodiment, indoor heat converter 41 is the finned fin-tube heat exchangers of intersection, but is not limited thereto, and also can adopt other forms of heat exchanger.
In the present embodiment, indoor unit 4 has indoor fan 42, this indoor fan 42 is used for room air is sucked in the unit as Air Blast fan, and make this room air in indoor heat converter 41 with the cold-producing medium heat exchange after, supply to it indoor as air supply.Indoor fan 42 is the variable fans of air quantity that can make the air that supplies to indoor heat converter 41, in the present embodiment, and the centrifugal fan that is driven by the motor 42m that is consisted of by dc fan motor etc., multiblade fan etc.
In addition, in indoor unit 4, be provided with the indoor temperature transmitter 43 that the temperature (that is, indoor temperature) that flows into the room air in the unit is detected in the suction inlet side of the room air of indoor unit 4.In the present embodiment, indoor temperature transmitter 43 is made of thermistor.In addition, indoor unit 4 has the indoor control part 44 that the action of the each several part that consists of indoor unit 4 is controlled.In addition, indoor control part 44 has the microcomputer established for the control of carrying out indoor unit 4, memory etc., can and be used for carrying out between the remote controller (not shown) of individual operation indoor unit 4 exchange of control signal etc., or and outdoor unit 2 between carry out the exchange of control signal etc. via conveyer line 8a.
(outdoor unit)
Then, the structure of outdoor unit 2 described.Outdoor unit 2 mainly has the outside refrigerant loop 12 of a part that consists of refrigerant loop 10.This outside refrigerant loop 12 mainly has compressor 21, four-way switching valve 22, as the outdoor heat converter 23 of heat source side heat exchanger, outdoor expansion valve 33, fluid reservoir 24, hydraulic fluid side stop valve 25 and gas side stop valve 26 as expansion mechanism.
Four-way switching valve 22 is the valves for the flow direction that switches cold-producing medium, when cooling operation, for outdoor heat converter 23 being worked as the condenser of the cold-producing medium that is compressed by compressor 21 and indoor heat converter 41 being worked as the evaporimeter of the cold-producing medium that is condensed in outdoor heat converter 23, the ejection side that can connect compressor 21 and the gas side of outdoor heat converter 23 and the suction side that is connected compressor 21 are (particularly, fluid reservoir 24) be communicated with pipe arrangement 7 sides (cooling operation state: with reference to the solid line of the four-way switching valve 22 of Fig. 1) with gas refrigerant, when heating running, for indoor heat converter 41 being worked as the condenser of the cold-producing medium that is compressed by compressor 21 and outdoor heat converter 23 being worked as the evaporimeter of the cold-producing medium that is condensed in indoor heat converter 41, the ejection side that can connect compressor 21 and gas refrigerant connection pipe arrangement 7 sides also are connected the suction side of compressor 21 and the gas side of outdoor heat converter 23 (heating operating condition: with reference to the dotted line of the four-way switching valve 22 of Fig. 1).
In the present embodiment, outdoor heat converter 23 is the finned fin-tube heat exchangers of intersection that are made of heat pipe and many fins, be that the condenser as cold-producing medium works when cooling operation, heating when running heat exchanger of working of the evaporimeter as cold-producing medium.The gas side of outdoor heat converter 23 is connected with four-way switching valve 22, and its hydraulic fluid side is communicated with pipe arrangement 6 with liquid refrigerant and is connected.In the present embodiment, outdoor heat converter 23 is the finned fin-tube heat exchangers of intersection, but is not limited thereto, and also can adopt other forms of heat exchanger.
In the present embodiment, outdoor expansion valve 33 is for the adjusting of carrying out pressure, flow etc. at the interior mobile cold-producing medium of outside refrigerant loop 12 and the flow direction of the cold-producing medium in the refrigerant loop 10 when carrying out kind of refrigeration cycle is disposed at (being to be connected with the hydraulic fluid side of the outdoor heat converter 23 in the present embodiment) electric expansion valve in the downstream of outdoor heat converter 23.
In the present embodiment, outdoor unit 2 has outdoor fan 27, and this outdoor fan 27 is used for outdoor air is sucked in the unit as Air Blast fan, and make this outdoor air in outdoor heat converter 23 with the cold-producing medium heat exchange after, it is discharged to outdoor.This outdoor fan 27 is the variable fans of air quantity that can make the air that supplies to outdoor heat converter 23, in the present embodiment, and the propeller fan that is driven by the motor 27m that is consisted of by dc fan motor etc. etc.
Hydraulic fluid side stop valve 25 and gas side stop valve 26 are valves of being located at the connector that connects with the equipment of outside, pipe arrangement (being that liquid refrigerant is communicated with pipe arrangement 6 and gas refrigerant is communicated with pipe arrangement 7 particularly).Hydraulic fluid side stop valve 25 is connected with outdoor heat converter 23.Gas side stop valve 26 is connected with four-way switching valve 22.
In addition, in outdoor unit 2, be provided with various sensors.Particularly, in outdoor unit 2, be provided with: the evaporating pressure sensor 28 that the pressure of the gas refrigerant that flows into from indoor heat converter 41 is detected; To the condensing pressure sensor 29 that is detected by the condensing pressure of outdoor heat converter 23 condensations; The inlet temperature sensor 30 that the inlet temperature of compressor 21 is detected; And the hydraulic fluid side temperature sensor 31 that the temperature of the cold-producing medium of liquid condition or gas-liquid two-phase state is detected in the hydraulic fluid side of outdoor heat converter 23.Suction inlet side at the outdoor air of outdoor unit 2 is provided with the outdoor temperature sensor 32 that the temperature (that is, outdoor temperature) that flows into the outdoor air in the unit is detected.In the present embodiment, inlet temperature sensor 30, hydraulic fluid side temperature sensor 31 and outdoor temperature sensor 32 are made of thermistor.In addition, outdoor unit 2 comprises the outside control part 34 that the action of the each several part that consists of outdoor unit 2 is controlled.In addition, outside control part 34 has inverter loop that the microcomputer of establishing for the control of carrying out outdoor unit 2, memory, motor 21m are controlled etc., can and the indoor control part 44 of indoor unit 4 between carry out the exchange of control signal etc.That is, the conveyer line 8a of the inboard control part 44 of utilization junction chamber between control part 34,44 and outside control part 34 consists of the control part 8 of the running control of carrying out conditioner 1 integral body.
As mentioned above, the inboard refrigerant loop 11 of junction chamber, outside refrigerant loop 12, cold-producing medium are communicated with pipe arrangement 6,7, thereby consist of the refrigerant loop 10 of conditioner 1.In addition, the conditioner 1 of present embodiment utilizes four-way switching valve 22 to switch cooling operation and heat and turns round to turn round, and carries out the control of each equipment of outdoor unit 2 and indoor unit 4 according to the running load of indoor unit 4.
(2) action of conditioner
Then, the action of the conditioner 1 of present embodiment described.
Operation mode as the conditioner 1 of present embodiment exists common operation mode and determining amount of refrigerant operation mode, wherein, above-mentioned common operation mode carries out the control of each equipment of outdoor unit 2 and indoor unit 4 according to the running load of indoor unit 4, above-mentioned determining amount of refrigerant operation mode carries out cooling operation to whole indoor units 4 on one side, detect on one side the degree of supercooling of the cold-producing medium in outdoor heat converter 23 exits of working as condenser, thereby judge that suitably whether the refrigerant amount that to be filled in the refrigerant loop 10.In addition, usually having cooling operation and heat running in the operation mode, in the determining amount of refrigerant operation mode, exist refrigrant leakage to detect running.
Below, the action of each operation mode of conditioner 1 is described.
(usually operation mode)
At first, the cooling operation of common operation mode described.
When cooling operation, four-way switching valve 22 becomes the state shown in the solid line of Fig. 1, that is, and and the state that the ejection side that becomes compressor 21 is connected with the gas side of outdoor heat converter 23 and the suction side of compressor 21 is connected with the gas side of indoor heat converter 41.At this, hydraulic fluid side stop valve 25 and gas side stop valve 26 are in open mode.In addition, outdoor expansion valve 33 carries out regulation so that the degree of supercooling of the cold-producing medium in outdoor heat converter 23 exits becomes setting.In the present embodiment, be converted into the saturation temperature value of cold-producing medium by refrigerant pressure (condensing pressure) value of pressure sensor 29 detected outdoor heat converter 23 outlet sides that will be condensed, and deduct by hydraulic fluid side temperature sensor 31 detected refrigerant temperature values from the saturation temperature value of this cold-producing medium, come the degree of supercooling of the cold-producing medium in outdoor heat converter 23 exits is detected.
When the state with this refrigerant loop 10 started compressor 21 and outdoor fan 27, the gas refrigerant of low pressure was inhaled into compressor 21 and compressed, thereby formed the gas refrigerant of high pressure.Then, the gas refrigerant of high pressure is transported to outdoor heat converter 23 via four-way switching valve 22, carries out heat exchange with the outdoor air of being supplied with by outdoor fan 27 and is condensed, thereby form the liquid refrigerant of high pressure.In addition, thus the liquid refrigerant of high pressure and is communicated with pipe arrangement 6 via hydraulic fluid side stop valve 25 and liquid refrigerant and is transported to indoor unit 4 by outdoor expansion valve 33 cold-producing medium of the gas-liquid two-phase state that forms low pressure that reduces pressure.At this, because outdoor expansion valve 33 is controlled at the flow of the interior mobile cold-producing medium of outdoor heat converter 23 so that the degree of supercooling in outdoor heat converter 23 exits becomes setting, the liquid refrigerant of the high pressure that therefore, is condensed in outdoor heat converter 23 becomes the state with regulation degree of supercooling.
The cold-producing medium of gas-liquid two-phase state that is transported to the low pressure of indoor unit 4 is transported to indoor heat converter 41, carries out heat exchange with room air and be evaporated in indoor heat converter 41, thereby form the gas refrigerant of low pressure.In addition, in indoor heat converter 41, flow cold-producing medium with the corresponding flow of the desired running load of the conditioned space that is provided with indoor unit 4 is arranged.
The gas refrigerant of this low pressure is communicated with pipe arrangement 7 via gas refrigerant and is transported to outdoor unit 2, and flows into fluid reservoir 24 via gas side stop valve 26 and four-way switching valve 22.In addition, the gas refrigerant of the low pressure of inflow fluid reservoir 24 is inhaled into compressor 21 again.At this, according to the running load of indoor unit 4, for example in the less situation of the running load of indoor unit 4 or situation about stopping, can in fluid reservoir 24, accumulate residual refrigerant.
At this, as shown in Figure 2, the distribution of the cold-producing medium when carrying out the cooling operation of common operation mode in the refrigerant loop 10 is distributed as, and cold-producing medium becomes each state of liquid condition (dash area of comprehensively smearing of Fig. 2), gas-liquid two-phase state (the cancellate dash area of Fig. 2), gaseous state (dash area of the oblique line of Fig. 2).Particularly, be full of by the cold-producing medium of liquid condition near the part to outdoor expansion valve 33 outlet of outdoor heat converter 23.In addition, the mid portion of outdoor heat converter 23 and from outdoor expansion valve 33 to indoor heat converter near the part 41 the entrance is full of by the cold-producing medium of gas-liquid two-phase state.In addition, the mid portion from indoor heat converter 41 is full of by the cold-producing medium of gaseous state near the part the entrance of outdoor heat converter 23 via gas refrigerant connection pipe arrangement 7, the part except a part of fluid reservoir 24, compressor 21.Sometimes accumulate in the part of the fluid reservoir except this quilt the liquid refrigerant that stays as residual refrigerant is arranged.At this, Fig. 2 is the schematic diagram that is illustrated in the state of the interior mobile cold-producing medium of the refrigerant loop 10 of cooling operation.
Then, the running that heats of common operation mode described.
Heating when running, four-way switching valve 22 becomes the state shown in the dotted line of Fig. 1, that is, and and the state that the ejection side that becomes compressor 21 is connected with the gas side of indoor heat converter 41 and the suction side of compressor 21 is connected with the gas side of outdoor heat converter 23.Outdoor expansion valve 33 carries out regulation and reduces pressure with the cold-producing medium with inflow outdoor heat exchanger 23 can make its pressure that evaporates (that is, evaporating pressure) in outdoor heat converter 23.In addition, hydraulic fluid side stop valve 25 and gas side stop valve 26 are in open mode.
When the state with this refrigerant loop 10 starts compressor 21 and outdoor fan 27, the gas refrigerant of low pressure is inhaled into compressor 21 and is compressed, thereby form the gas refrigerant of high pressure, and be transported to indoor unit 4 via four-way switching valve 22, gas side stop valve 26 and gas refrigerant connection pipe arrangement 7.
In addition, the gas refrigerant that is transported to the high pressure of indoor unit 4 carries out heat exchange with room air and is condensed in indoor heat converter 41, after it becomes the liquid refrigerant of high pressure, is communicated with pipe arrangement 6 via liquid refrigerant and is transported to outdoor unit 2.
Thereby the liquid refrigerant of this high pressure via hydraulic fluid side stop valve 25 by outdoor expansion valve 33 the reduce pressure cold-producing medium of the gas-liquid two-phase state that becomes low pressure and inflow outdoor heat exchanger 23.In addition, the cold-producing medium of the gas-liquid two-phase state of the low pressure of inflow outdoor heat exchanger 23 carries out heat exchange with the outdoor air of being supplied with by outdoor fan 27 and is evaporated, thereby becomes the gas refrigerant of low pressure, and flows into fluid reservoir 24 via four-way switching valve 22.In addition, the gas refrigerant of the low pressure of inflow fluid reservoir 24 is inhaled into compressor 21 again.At this, identical during with cooling operation in the situation of refrigerant loop 10 interior generation residual refrigerant amounts such as the less situation of the running load of indoor unit 4 etc. like that according to the running load of indoor unit 4, can in fluid reservoir 24, accumulate residual refrigerant.
(determining amount of refrigerant operation mode)
In the determining amount of refrigerant operation mode, carry out refrigrant leakage and detect running, wherein, arrange conditioner 1 turn round for the first time (below, be made as first setting running) time method of operation different with the method for operation during for the second time later running (below, be made as and judge running).Therefore, below being divided into first setting running and judgement running describes.
(the first setting turned round)
At the scene, thereby the outdoor unit 2 that will be pre-charged with cold-producing medium via liquid refrigerant connection pipe arrangement 6 and gas refrigerant connection pipe arrangement 7 is connected formation refrigerant loop 10 with indoor unit 4 after, when by remote controller (not shown) or directly the outside control part 34 of the indoor control part 44 of indoor unit 4, outdoor unit 2 is sent instruction when being the running of cold-producing medium automatic filling with a running carrying out the determining amount of refrigerant operation mode, set for the first time running (with reference to Fig. 2) with the order from following step S1 to step S7.
-step S1, to indoor unit carry out cooling operation (outdoor fan air quantity maximum)-
At first, in step S1, when sending the sign on of first setting running, the four-way switching valve 22 of outdoor unit 2 becomes the state (cooling operation state) shown in the solid line of Fig. 1 in refrigerant loop 10.In addition, start compressor 21, outdoor fan 27, whole indoor unit semi-finals systems ground is carried out the cooling operation cooling operation of the control method of outdoor fan 27 etc. and the common operation mode (time different) (with reference to Fig. 2).At this moment, make the rotating speed maximum of motor 27m so that the air quantity of outdoor fan 27 becomes maximum.In step S1, owing in the cooling operation state, make the air quantity of outdoor fan 27 maximum, therefore, can make the pyroconductivity of the air side of utilizing the heat exchanger effectiveness that outdoor heat converter 23 carries out maximum, thereby can reduce the impact of interference.Checking to this effect will be described hereinafter.In addition, " interference " described herein refer to the having or not etc. of the situation that arranges, wind and rain of dirt, the outdoor unit 2 of outdoor heat converter 23.In addition, when the air quantity of this outdoor fan 27 becomes maximum, shift towards following step S2.
-step S2, the reading in of temperature-
In step S2, read in by indoor temperature transmitter 43 detected indoor temperature Tb with by the detected outdoor temperature Ta of outdoor temperature sensor.When detecting indoor temperature Tb and outdoor temperature Ta, shift towards following step S3.
-step S3, judgement that whether can detection range-
In step S3, judge that the indoor temperature Tb be detected and outdoor temperature Ta are whether in the temperature range of the regulation of predefined suitable determining amount of refrigerant operation mode.In step S3, shift towards following step S4 in the situation in indoor temperature Tb and outdoor temperature Ta are in the temperature range of regulation, continue the cooling operation of step S1 in the situation in indoor temperature Tb and outdoor temperature Ta are not in the temperature range of regulation.
-step S4, relatively degree of supercooling whether be the above judgement of setting-
In step S4, derive relative degree of supercooling value, judge whether relative degree of supercooling value is setting above (for example, more than 0.3)." relatively degree of supercooling value " described herein refers to utilize from the condensation temperature value and deducts that value after the outdoor temperature is removed the degree of supercooling value in outdoor heat converter 23 exits and the value that obtains.In addition, on accompanying drawing, relative degree of supercooling is labeled as relative SC.To be elaborated in the back for " relatively degree of supercooling value ".In the present embodiment, the condensation temperature value is used is the value that pressure (condensing pressure) value of outdoor heat converter 23 outlet sides that condensing pressure sensor 29 is detected is scaled the saturation temperature of cold-producing medium.In step S4, when being judged as relative degree of supercooling value less than setting, shift towards following step S5, when being determined to be smaller than setting, shift towards step S6.Because relative degree of supercooling reduces by 0.3 when the filling cold-producing medium in the refrigerant loop has 10% to leak, and therefore, in the present embodiment, the value of relative degree of supercooling is in more than 0.3.That is, to be at least more than 0.3 be comparatively desirable to this setting.
-step S5, the relatively control of degree of supercooling-
In step S5, because the degree of supercooling value is less than setting relatively, therefore, the speed of control the compressor 21 and degree of superheat in indoor heat converter 41 exits so that relative degree of supercooling value becomes more than the setting.For example, be that the degree of superheat in 40Hz, indoor heat converter 41 exits is the cooling operation that carries out step S1 under 5 ℃ the state in the speed of compressor 21, judge whether relative degree of supercooling value is in more than the setting.In this operating condition, in the relative situation of degree of supercooling value less than setting, the speed that keeps compressor 21, thereby the degree of superheat of the cold-producing medium in indoor heat converter 41 exits is improved 5 ℃ makes it be in 10 ℃, derive relative degree of supercooling value, judge whether relative degree of supercooling value becomes more than the setting.In addition, relative degree of supercooling value less than the situation of setting under aforesaid operations repeatedly, even rise to the relative degree of supercooling value of maximum also in the situation less than setting in the degree of superheat of the cold-producing medium in indoor heat converter 41 exits, the speed of compressor 21 for example is increased to 50Hz from 40Hz, and the degree of superheat that makes the cold-producing medium in indoor heat converter 41 exits is reduced to 5 ℃, judges similarly whether relative degree of supercooling value is in more than the setting.In addition, by repeatedly as mentioned above again the operation of the degree of superheat of each cold-producing medium that 5 ℃ ground improves indoor heat converter 41 exits control so that the degree of supercooling value becomes more than the setting relatively.In addition, if the degree of supercooling value becomes more than the setting relatively, then shift towards step S6.Carry out the control (for example, making the degree of superheat each 5 ℃ of controls that ground improves gradually from 5 ℃) of the degree of superheat of the cold-producing medium in indoor heat converter 41 exits by screw outdoor expansion valve 33 from the state of opening.In addition, the control of the degree of superheat of the cold-producing medium in indoor heat converter 41 exits is not limited to this, can control by the air quantity of control room internal fan 42, also can and control with the control of the air quantity of the control of the valve opening of outdoor expansion valve 33 and indoor fan 42.At this, by deducting and to be converted into the value of the saturation temperature value of cold-producing medium by steam pressure sensor 28 detected evaporating pressure values from being inhaled into temperature sensor 30 detected refrigerant temperature values, detect the degree of superheat of the cold-producing medium in indoor heat converter 41 exits.
By step S5 to the degree of superheat control to be on the occasion of, therefore, as shown in Figure 4, be formed on and do not accumulate the state that residual refrigerant is arranged in the fluid reservoir 24, thereby make the cold-producing medium that lodges in fluid reservoir 24 move to outdoor heat converter 23.
-step S6, store relative degree of supercooling-
In step S6, the relative degree of supercooling value that will be in step S4 or step S6 more than the setting is stored as first relatively degree of supercooling value, and shifts towards following step S7.
-step S7, stored parameter-
In step S7, speed, the speed of indoor fan 42, outdoor temperature Ta, the indoor temperature Tb of the compressor 21 of the operating condition in the degree of supercooling value that will store in step S6 are stored, and finish the first running of setting.
(judging running)
Then, use Fig. 3 that a running in the determining amount of refrigerant operation mode is judged that namely running describes.Fig. 3 is the flow chart when judging running.
This judgement running be after setting running for the first time termly (for example, once a year, when conditioned space need not load etc.) from the cooling operation of common operation mode, heat running and switch, to the cold-producing medium in the refrigerant loop whether because of be difficult to expect former thereby running that section's leakage outwardly detects.
-step S11, usually operation mode whether passed through the judgement of certain hour-
At first, whether above-mentioned cooling operation, the running that heats the such common operating mode of running are passed through certain hour judged, passed through in the situation of certain hour in the common running of operation mode, transferred to following step S12.
-step S12, to indoor unit carry out cooling operation-
Running at common operation mode has been passed through in the situation of certain hour, identical with the step S1 of above-mentioned first setting running, the four-way switching valve 22 of outdoor unit 2 becomes the state shown in the solid line of Fig. 1 in refrigerant loop 10, start compressor 21, outdoor fan 27, whole indoor unit semi-finals systems ground is carried out cooling operation.
-step S13, the reading in of temperature-
In step S13, identical with the step S2 of above-mentioned first setting running, carry out reading in of indoor temperature and outdoor temperature.When detecting indoor temperature Tb and outdoor temperature Ta, shift towards following step S14.
-step S14, judgement that whether can detection range-
In step S14, identical with the step S3 of above-mentioned first setting running, judge that the indoor temperature Tb that is detected and outdoor temperature Ta are whether in the temperature range of the regulation of predefined suitable determining amount of refrigerant operation mode.In step S14, shift towards following step S15 in the situation in indoor temperature Tb and outdoor temperature Ta are in the temperature range of regulation, continue the cooling operation of step S12 in the situation in indoor temperature Tb and outdoor temperature Ta are not in the temperature range of regulation.
-step S15, be controlled to the condition of first setting running-
In step S15, compressor 21 and indoor fan 42 are controlled, so that the speed of the speed of compressor 21 and indoor fan 42 becomes the speed of the compressor 21 of storing and the speed of indoor fan 42 in the step S7 of above-mentioned first setting running.By this, the state of the cold-producing medium of refrigerant loop 10 inside can be regarded as the state identical with first setting running.That is, if the refrigerant amounts in the refrigerant loop 10 do not change, then reproduce as the condition identical with each condition of the cooling operation that carries out in the first setting running, thereby can make degree of supercooling value etc. become roughly the same value.When step S15 finishes, shift towards following step S16.
Suitably whether judgement of-step S16, refrigerant amount-
In step S16, identical with the step S4 of above-mentioned first setting running, derive relative degree of supercooling.In addition, to deducting from first relatively degree of supercooling whether value after the relative degree of supercooling (below, it is poor to be called relative degree of supercooling) is to judge more than the second setting.In step S16, relative degree of supercooling is poor to finish to judge running during less than the second setting when being judged as, and is that the second setting shifts towards step S17 when above when being judged as relative degree of supercooling poor.
-step S17, the warning demonstration-
In step S17, after being judged to be the leakage that produces cold-producing medium and having carried out informing the warning demonstration of the situation that detects refrigrant leakage, finish to judge running.
(about relative degree of supercooling value)
According to Fig. 6～Fig. 8 relative degree of supercooling value is described.
At first, Fig. 6 be the expression outdoor temperature Ta corresponding with the outdoor fan air quantity when constant condensation temperature Tc and the chart of outdoor heat converter outlet temperature Tl.Observe Fig. 6, under the constant condition of outdoor temperature Ta, along with the outdoor fan air quantity increases, condensation temperature Tc and outdoor heat converter outlet temperature Tl reduce.In addition, the drop of this minimizing is that condensation temperature Tc is larger than outdoor heat converter outlet temperature Tl.That is, as can be known, when the outdoor fan air quantity became large, the difference of condensation temperature Tc and outdoor heat converter outlet temperature Tl was that the degree of supercooling value diminishes.
At this, the chart of observing the distribution of the expression degree of supercooling value corresponding with the outdoor fan air quantity be Fig. 7 as can be known, when the outdoor fan air quantity increased, the degree of supercooling value diminished.In addition, in Fig. 7, the deviation of the degree of supercooling value in the less situation of outdoor fan air quantity is larger than the deviation of the degree of supercooling value in the larger situation of outdoor fan air quantity.This can consider to be caused by following reason: in the less situation of outdoor fan air quantity, be subject to easily the impact that the situation that arranges, wind and rain etc. of dirt, the off-premises station of outdoor heat converter are disturbed, and in the larger situation of outdoor fan air quantity, the impact that is difficult for being interfered.Therefore, be in maximum by making the outdoor fan air quantity, can suppress the deviation of the degree of supercooling value that is detected, detect error thereby can reduce.
In addition, Fig. 8 is the chart of the distribution of the expression relative degree of supercooling value corresponding with the outdoor fan air quantity.As mentioned above, relatively the degree of supercooling value refers to utilize from the condensation temperature value and deducts that value after the outdoor temperature is removed the degree of supercooling value and the value that obtains.Observe Fig. 8 as can be known, regardless of the size of outdoor fan air quantity, this value all drops on roughly between 0.3 to 0.4, and deviation is less.Therefore, by judging that refrigerant amount suitably should relative degree of supercooling value uses as index whether the time, can be as far as possible without interruption with affecting the judgement refrigerant amount suitably whether, thereby can suppress the detection error.So it is useful that relative degree of supercooling value is used for the whether suitable judgement of refrigerant amount.
(3) feature of conditioner
In the present embodiment, storage is used for judging the whether suitable desired value of refrigerant amount, set in the early stage in the running, the degree of superheat of the cold-producing medium in control compressor 21 and indoor heat converter 41 exits so that the relative degree of supercooling that is detected be in more than the predefined setting (for example 0.3), the frequency of compressor is at this moment stored as first frequency, the degree of superheat of the cold-producing medium that utilizes side heat exchanger outlet place of (stable state) is stored at this moment, in addition, also relative degree of supercooling is at this moment stored as desired value.In addition, the judgement running of after first setting running process specified time limit (being a year in the present embodiment), carrying out, the FREQUENCY CONTROL of compressor 21 is arrived the frequency of storing by the initial setting running, and the degree of superheat of the cold-producing medium in indoor heat converter 41 exits controlled to the degree of superheat by initial setting running storage, detect as the relative degree of supercooling of detected value to this moment, relatively detected value and the desired value of setting in the early stage storage in the running, thus judge that suitably whether the refrigerant amount that to be filled in the refrigerant loop.
Therefore, set in the early stage in the running, for judging that the whether suitable index that adopts of refrigerant amount adopts relative degree of supercooling, and preset so that the value of this relative degree of supercooling is in for example more than 0.3, so, even substantially do not supposing have cold-producing medium to append in the conditioner of filling, can guarantee when whether refrigerant amount is suitably judged that also degree of supercooling or operating condition amount are a certain more values, in the situation that refrigerant amount reduces, detect easily these values and diminish, thereby can reduce the decision errors of refrigerant amount.
(4) variation 1
In the present embodiment, be converted into the saturation temperature value of cold-producing medium by refrigerant pressure (the being equivalent to condensing pressure) value of pressure sensor 29 detected outdoor heat converter 23 outlet sides that will be condensed, and deduct by hydraulic fluid side temperature sensor 31 detected refrigerant temperature values from the saturation temperature value of this cold-producing medium, come the degree of supercooling of the cold-producing medium in outdoor heat converter 23 exits is detected, but be not limited to this.
For example, also can arrange can sensing chamber the outdoor heat of temperature of cold-producing medium of outer heat-exchanger 23 hand over sensor and the saturation temperature value of condensation temperature value as cold-producing medium detected, deduct by hydraulic fluid side temperature sensor 31 detected refrigerant temperature values by the saturation temperature value from this cold-producing medium and detect.
(5) variation 2
In the present embodiment, relative degree of supercooling value as judging the whether suitable index of refrigerant amount, but is not limited to this, also can be with the degree of supercooling value as the whether suitable index of judgement refrigerant amount.
(6) variation 3
In the present embodiment, shown in Fig. 5 and explanation thereof, as an example, exemplified and make common operation mode and determining amount of refrigerant operation mode with the situation of the regular time interval control of switching, but be not limited thereto.
For example, can not to switch with control mode also, but will be located at air-conditioning adjusting device 1 be used to the switch that switches to the determining amount of refrigerant operation mode etc., detect running thereby make machinist, apparatus manager can be at the scene carry out termly refrigrant leakage by console switch etc.
(7) other embodiments
More than, with reference to the accompanying drawings embodiments of the present invention are illustrated, but concrete structure is not limited to above-mentioned embodiment, but in the scope that does not break away from thought of the present invention appropriate change.
For example, in the above-described embodiment, the example that applies the present invention to carry out the conditioner of cold and hot switching is illustrated, but be not limited thereto, be that the Split type air adjusting device just can be used the present invention, also can apply the present invention to paired type conditioner, the special-purpose conditioner of refrigeration.
Industrial practicality
If use the present invention, then can be in be communicated with pipe arrangement is connected heat source unit with range site Split type air adjusting device via cold-producing medium accurately judgement be filled in the refrigerant loop refrigerant amount suitably whether.
(symbol description)
1 conditioner
2 outdoor units (heat source unit)
4 indoor units (range site)
6 liquid refrigerants are communicated with pipe arrangement
7 gas refrigerants are communicated with pipe arrangement
10 refrigerant loops
21 compressors
23 outdoor heat converters (heat source side heat exchanger)
24 fluid reservoirs
27 outdoor fans (cooling thermal source adjusting device)
33 outdoor expansion valves (expansion mechanism)
41 indoor heat converters (utilizing the side heat exchanger)
The prior art document
Patent documentation
Patent documentation 1: Japanese Patent Laid-Open 2006-23072 communique
Claims (3)
1. the method for determining amount of refrigerant of a conditioner, has refrigerant loop (10) and substantially suitably whether the hypothesis refrigerant amount that has cold-producing medium to append to judge in the conditioner of filling in the described refrigerant loop, wherein, described refrigerant loop (10) comprising: the heat source unit (2) with compressor (21), heat source side heat exchanger (23), expansion mechanism (33) and the fluid reservoir (24) that can regulate the running consumption; Has the range site (4) that utilizes side heat exchanger (41); And connect described heat source unit and be communicated with pipe arrangement (6) and gas refrigerant with the liquid refrigerant of described range site and be communicated with pipe arrangement (7), described refrigerant loop (10) can make at least described heat source side heat exchanger work as the condenser of compressed cold-producing medium in described compressor and make the described cooling operation that utilizes the side heat exchanger to work as the evaporimeter of the cold-producing medium that is condensed in described heat source side heat exchanger, it is characterized in that, comprising:
Initial stage running step, this running step is carried out cooling operation from the common operation mode of the control of each equipment of carrying out described heat source unit and described range site according to the running load of described range site at initial stage, control described expansion mechanism so that the described degree of superheat of utilizing the cold-producing medium at side heat exchanger outlet place become on the occasion of, and make the relative degree of supercooling value of the cold-producing medium at described heat source side heat exchanger outlet place arrive the stable state that drops on the first setting between 0.3 to 0.4;
Storing step, this storing step is stored the frequency of the described compressor under the described stable state as first frequency, the described degree of superheat of the cold-producing medium at side heat exchanger outlet place of utilizing under the described stable state is stored as first degree of superheat, and the described relative degree of supercooling value under the described stable state is stored as the first desired value;
Common running transfer step, this transfer step that usually turns round is switched described refrigerant loop after described storing step finishes again towards described common operation mode;
Stable state is reproduced step, this stable state is reproduced step after passing through specified time limit from described common running transfer step, carry out the control of described compressor so that the frequency of described compressor becomes the described first frequency of being stored by described storing step, and carry out the control of described expansion mechanism so that the described degree of superheat becomes described first degree of superheat, and the relative degree of supercooling value that detects the cold-producing medium at described heat source side heat exchanger outlet place is used as detected value; And
Refrigerant amount is determination step whether suitably, and this refrigerant amount is whether more described the first desired value of determination step and described detected value suitably, with judgement be filled in the described refrigerant loop refrigerant amount suitably whether,
Described relative degree of supercooling value refers to utilize and deducts value after the outdoor temperature from the condensation temperature value and remove the degree of supercooling value in exit of described heat source side heat exchanger (23) and the value that obtains.
2. the method for determining amount of refrigerant of conditioner as claimed in claim 1 is characterized in that,
Described the first setting is the above suitable value of size that can judge the described relative degree of supercooling value of refrigrant leakage.
3. a conditioner (1) is characterized in that, comprising:
Refrigerant loop (10), this refrigerant loop (10) comprising: the heat source unit (2) with compressor (21), heat source side heat exchanger (23), expansion mechanism (33) and the fluid reservoir (24) that can regulate the running consumption; Has the range site (4) that utilizes side heat exchanger (41); And connect described heat source unit and be communicated with pipe arrangement (6) and gas refrigerant with the liquid refrigerant of described range site and be communicated with pipe arrangement (7), this refrigerant loop (10) can make at least described heat source side heat exchanger work as the condenser of compressed cold-producing medium in described compressor and make the described cooling operation that utilizes the side heat exchanger to work as the evaporimeter of the cold-producing medium that is condensed in described heat source side heat exchanger;
The initial stage rotating device, this initial stage rotating device carries out cooling operation from the common operation mode of the control of each equipment of carrying out described heat source unit and described range site according to the running load of described range site, control described expansion mechanism so that the described degree of superheat of utilizing the cold-producing medium at side heat exchanger outlet place become on the occasion of, and make the relative degree of supercooling value of the cold-producing medium at described heat source side heat exchanger outlet place arrive the stable state that drops on the first setting between 0.3 to 0.4;
Storage device, this storage device is stored the frequency of the described compressor under the described stable state as first frequency, the described degree of superheat of the cold-producing medium at side heat exchanger outlet place of utilizing under the described stable state is stored as first degree of superheat, and the described relative degree of supercooling value under the described stable state is stored as the first desired value;
Common running transfer device, this transfer device that usually turns round switches described refrigerant loop after the performed storing step of described storage device finishes again towards described common operation mode;
The stable state transcriber, this stable state transcriber is after the common running transfer step performed from described common running transfer device passed through specified time limit, carry out the control of described compressor so that the frequency of described compressor becomes the described first frequency of being stored by described storing step, and carry out the control of described expansion mechanism so that the described degree of superheat becomes described first degree of superheat, and the relative degree of supercooling value that detects the cold-producing medium at described heat source side heat exchanger outlet place is used as detected value; And
Refrigerant amount is decision maker whether suitably, and this refrigerant amount is whether more described the first desired value of decision maker and described detected value suitably, with judgement be filled in the described refrigerant loop refrigerant amount suitably whether,
Described relative degree of supercooling value refers to utilize and deducts value after the outdoor temperature from the condensation temperature value and remove the degree of supercooling value in exit of described heat source side heat exchanger (23) and the value that obtains.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-169596 | 2008-06-27 | ||
| JP2008169596A JP2010007995A (en) | 2008-06-27 | 2008-06-27 | Refrigerant amount determining method of air conditioning device, and air conditioning device |
| PCT/JP2009/002913 WO2009157200A1 (en) | 2008-06-27 | 2009-06-25 | Method for judging amount of refrigerant of air conditioner and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102077042A CN102077042A (en) | 2011-05-25 |
| CN102077042B true CN102077042B (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009801248092A Expired - Fee Related CN102077042B (en) | 2008-06-27 | 2009-06-25 | Method for judging amount of refrigerant of air conditioner and air conditioner |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20110088414A1 (en) |
| EP (1) | EP2314958B1 (en) |
| JP (1) | JP2010007995A (en) |
| CN (1) | CN102077042B (en) |
| AU (1) | AU2009263640B2 (en) |
| WO (1) | WO2009157200A1 (en) |
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| US20110219790A1 (en) * | 2010-03-14 | 2011-09-15 | Trane International Inc. | System and Method For Charging HVAC System |
| JP5447499B2 (en) * | 2011-12-28 | 2014-03-19 | ダイキン工業株式会社 | Refrigeration equipment |
| CN103388883B (en) * | 2013-07-31 | 2015-12-02 | 美的集团武汉制冷设备有限公司 | The decision method of refrigrant leakage and transducer air conditioning in transducer air conditioning |
| CN103712749A (en) * | 2013-12-26 | 2014-04-09 | 石家庄国祥运输设备有限公司 | Method for detecting leakage rate of refrigerant of air conditioners in train |
| JP6238876B2 (en) * | 2014-11-21 | 2017-11-29 | 三菱電機株式会社 | Refrigeration cycle equipment |
| CN107110586B (en) * | 2015-02-25 | 2020-01-24 | 三菱电机株式会社 | Refrigerating device |
| WO2016207992A1 (en) * | 2015-06-24 | 2016-12-29 | 三菱電機株式会社 | Air conditioner |
| JP2017053566A (en) * | 2015-09-10 | 2017-03-16 | ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド | Refrigeration cycle device |
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- 2009-06-25 US US12/999,734 patent/US20110088414A1/en not_active Abandoned
- 2009-06-25 EP EP09769910.2A patent/EP2314958B1/en not_active Withdrawn - After Issue
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Also Published As
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| AU2009263640B2 (en) | 2012-09-06 |
| EP2314958B1 (en) | 2018-11-21 |
| EP2314958A1 (en) | 2011-04-27 |
| EP2314958A4 (en) | 2014-11-26 |
| JP2010007995A (en) | 2010-01-14 |
| CN102077042A (en) | 2011-05-25 |
| AU2009263640A1 (en) | 2009-12-30 |
| WO2009157200A1 (en) | 2009-12-30 |
| US20110088414A1 (en) | 2011-04-21 |
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