CN101231016A - Device and method for connecting and detecting pipe of multi-connected air conditioner - Google Patents
Device and method for connecting and detecting pipe of multi-connected air conditioner Download PDFInfo
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- CN101231016A CN101231016A CNA2007100963269A CN200710096326A CN101231016A CN 101231016 A CN101231016 A CN 101231016A CN A2007100963269 A CNA2007100963269 A CN A2007100963269A CN 200710096326 A CN200710096326 A CN 200710096326A CN 101231016 A CN101231016 A CN 101231016A
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- expansion valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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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
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/32—Details or features not otherwise provided for preventing human errors during the installation, use or maintenance, e.g. goofy proof
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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
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
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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
- F25B2600/02—Compressor control
- F25B2600/024—Compressor control by controlling the electric parameters, e.g. current or voltage
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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
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a pipe connection detecting device of a multi-connected air-conditioner and a method thereof, the objective of the invention is to correctly detect the pipe connection situation of an outdoor machine and an indoor machine in order to avoid possible errors of the pipe detection when capacity of the indoor machine is large. The pipe connection detecting method of the multi-connected air-conditioner provided by the invention comprises the steps of: running a compressor in the event that an electronic expanding valve corresponding to a plurality of the indoor machines are opened; detecting the temperature difference of pipe in each indoor machine caused by the running of the compressor before and after opening the electronic expanding valve; comparing the detected temperature difference of pipe with prearranged benchmark temperature, and changing the running frequency of the compressor in case that the temperature difference of pipe is within the range of benchmark temperature; detecting the temperature difference of pipe in the indoor machine caused by the running of the compressor after the frequency of the compressor is changed, in order to detect that the pipe connection situation is good enough for matching the plurality of the indoor machines with the electronic expanding valve.
Description
Technical field
The present invention relates to the multi-connected air conditioner that off-premises station connects many indoor sets, relate in particular to and be used for correctly checking that the pipeline of off-premises station and indoor set is connected the pipeline connection testing fixture and the method thereof of the multi-connected air conditioner of situation.
Background technology
Usually, air conditioner is to be used for the device that freezes or heat indoor, by being applied in the common kind of refrigeration cycle of circulating refrigerant between indoor set and the off-premises station, the characteristic that discharges its heat when utilizing liquid refrigerant when gasification to absorb ambient heat, gaseous refrigerant liquefaction is freezed or is heated.
General air conditioner is to connect an indoor set on an off-premises station, many indoor sets is independently freezed or the user's request of the multi-connected air conditioner (Multi system air conditioner) of heating operation is increase trend respectively but connect many indoor sets on the nearest off-premises station.
This multi-connected air conditioner connects refrigerant tubing between off-premises station and Duo Tai indoor set circulate cold-producing medium, and the connection differentiating forms according to refrigerant tubing between off-premises station and the indoor set is one-pipe type and many pipeline types usually.The one-pipe type is meant that a refrigerant tubing that is connected in off-premises station branches into a plurality of refrigerant tubings by branch unit and is connected to each indoor set.Many pipeline types do not have special branch unit, but between off-premises station and each indoor set man-to-man refrigerant tubing are set, and make cold-producing medium carry out independent loops between off-premises station and indoor set.That is, connect the refrigerant tubing suitable on the off-premises station, and each refrigerant tubing connects an indoor set respectively with indoor set quantity.
This many pipeline types multi-connected air conditioner is being connected in electric expansion valve (the Electronic ExpansionValve that is provided with respectively on each refrigerant tubing suitable with indoor set quantity of off-premises station corresponding to each indoor set, be called for short EEV), make the refrigerant tubing of off-premises station and indoor set be connected be complementary (matching).
In the past in order initially to install or to carry out checking when mobile that the pipeline of off-premises station and indoor set is connected situation, make off-premises station carry out refrigerating operaton, and only open starting operation that connect to check the electric expansion valve (other electric expansion valves are closed) of object indoor set corresponding to pipeline, when prestart pipe temperature and starting back (after about 3～4 minutes) pipe temperature difference more than 8 ℃ the time, be judged as pipeline and connect all right.Finish after the pipeline connection situation inspection of an indoor set, proceed the refrigeration piping checking mode and check that successively the pipeline of next indoor set connects situation.
But, this existing multi-connected air conditioner refrigeration piping checking mode, when the indoor set volume is big, prestart pipe temperature and the situation of the difference of starting the back pipe temperature less than 8 ℃ appear sometimes, even this moment, pipeline connected all right pipeline bad connection of also can thinking mistakenly.
Summary of the invention
The present invention proposes in order to solve aforesaid problem, its purpose is to provide a kind of pipeline of multi-connected air conditioner to connect testing fixture and method thereof, the present invention is connected in the refrigeration piping checking mode of situation when the difference of the pipe temperature behind the prestart is in the certain temperature range at the pipeline of checking off-premises station and indoor set by refrigerating operaton, change compressor frequency and reexamine pipeline connection situation, thereby avoid contingent pipe inspection mistake when the indoor set volume is big.
To achieve these goals, the pipeline of multi-connected air conditioner provided by the present invention connects inspection method at having off-premises station and carrying out many indoor sets that the multitube road is connected with described off-premises station, and be provided with the multi-connected air conditioner of a plurality of electric expansion valves that correspond respectively to described many indoor sets, it is characterized in that checking that described off-premises station comprises step when being connected situation with Duo Tai indoor set pipeline: operation compressor when the electric expansion valve that corresponds respectively to described many indoor sets is opened; Each indoor set pipe temperature before and after detection is opened by the caused electric expansion valve of the operation of described compressor is poor; Detected pipe temperature difference and predefined fiducial temperature are compared, when described pipe temperature difference is in the reference temperature range, change the running frequency of described compressor; The operation caused indoor set pipe temperature of detection after by described compressor converted frequency conversion rate is poor, checks that with this pipeline connects situation and whether well makes described many indoor sets and electric expansion valve be complementary.
The pipeline of multi-connected air conditioner provided by the present invention connects inspection method, it is characterized in that: when the electric expansion valve that corresponds respectively to described many indoor sets is opened, move in the step of compressor, only open electric expansion valve corresponding to a certain indoor set, to be used for a certain indoor set supply cold-producing medium, move described compressor with predefined pipe inspection mode frequency simultaneously to described many indoor sets.
The pipeline of multi-connected air conditioner provided by the present invention connects inspection method, it is characterized in that: in the step that detects each indoor set pipe temperature difference of opening front and back by the caused electric expansion valve of the operation of described compressor, carry out refrigerating operaton and move under the state of all indoor machine fans at described off-premises station, only open electric expansion valve, change thereby detect the indoor set pipe temperature and the indoor set pipe temperature of electric expansion valve after opening of described electric expansion valve before opening corresponding to a certain indoor set in described many indoor sets.
The pipeline of multi-connected air conditioner provided by the present invention connects inspection method, it is characterized in that: described reference temperature range be about 4 ℃～less than 8 ℃.
The pipeline of multi-connected air conditioner provided by the present invention connects inspection method, it is characterized in that: in the step that changes described compressor operating frequency, described compressor frequency is improved preset frequency and appends the refrigerating operaton that carries out each indoor set is carried out pipe inspection.
The pipeline of multi-connected air conditioner provided by the present invention connects inspection method, and it is characterized in that: described preset frequency is more than the 5Hz.
The pipeline of multi-connected air conditioner provided by the present invention connects inspection method, it is characterized in that: checking that pipeline connects in the step whether situation make well that described many indoor sets and electric expansion valve be complementary, detect described electric expansion valve and open the poor of preceding indoor set pipe temperature and described compressor change running frequency indoor set pipe temperature afterwards, and the detected pipe temperature difference and the predefined benchmark temperature difference compared, when described pipe temperature difference during more than or equal to the benchmark temperature difference, the pipeline that is judged as described indoor set connects all right, when described pipe temperature difference during less than the benchmark temperature difference, send the pipe inspection rub-out signal of described indoor set, connect situation to check described many indoor set pipelines.
And the pipeline of multi-connected air conditioner provided by the present invention connects testing fixture, comprises: off-premises station; Carry out many indoor sets that the multitube road is connected with described off-premises station; Correspond respectively to a plurality of electric expansion valves of described many indoor sets; The compressor of operation when the electric expansion valve that corresponds respectively to described many indoor sets is opened; And control part, with be used to detect described electric expansion valve open before and after each indoor set pipe temperature poor, and detected pipe temperature difference and predefined fiducial temperature compared, when described pipe temperature difference is in the reference temperature range, change the running frequency of described compressor, to check that pipeline connects situation and whether well makes described many indoor sets and electric expansion valve be complementary.
The pipeline of multi-connected air conditioner provided by the present invention connects testing fixture, it is characterized in that: described control part is only opened the electric expansion valve corresponding to a certain indoor set in described many indoor sets in refrigerating operaton, simultaneously move described compressor with predefined pipe inspection mode frequency, detect indoor set pipe temperature and electric expansion valve the indoor set pipe temperature open after of described electric expansion valve before opening thus and change, thereby check that described off-premises station is connected situation with the pipeline of Duo Tai indoor set.
The pipeline of multi-connected air conditioner provided by the present invention connects testing fixture, it is characterized in that: described control part appends the refrigerating operaton that improves described compressor frequency when described pipe temperature difference is in the reference temperature range, and detect described electric expansion valve and open preceding indoor set pipe temperature and the indoor set pipe temperature variation afterwards of described compressor change running frequency, check that with this described off-premises station is connected situation with the pipeline of Duo Tai indoor set.
Description of drawings
Fig. 1 is for using the refrigerant flow path figure of multi-connected air conditioner of the present invention;
The multi-connected air conditioner pipeline that Fig. 2 is provided for the foundation embodiment of the invention connects the control structure figure of testing fixture;
Fig. 3 a and Fig. 3 b are the flow chart that multi-connected air conditioner pipeline provided by the present invention connects inspection method;
Fig. 4 is the load running sequential chart under the multi-connected air conditioner refrigeration piping checking mode provided by the present invention.
Main symbol description: 10 is off-premises station, 11 is compressor, 12 is cross valve, and 13 is outdoor heat converter, and 14 is outdoor fan, 15A, 15B, 15C, 15D are electric expansion valve, 20A, 20B, 20C, 20D are indoor set, and 21A, 21B, 21C, 21D are indoor heat converter, and 22A, 22B, 22C, 22D are indoor fan, 23A, 23B, 23C, 23D are Tube Temperature Sensor, and 32 is control part.
The specific embodiment
Describe the embodiment of the invention with reference to the accompanying drawings in detail.
Fig. 1 is the refrigerant flow path figure of multi-connected air conditioner provided by the present invention, and the state that connects four indoor set 20A, 20B, 20C, 20D with an off-premises station 10 is that example describes.
Among Fig. 1, multi-connected air conditioner of the present invention has an off-premises station 10 and is connected in parallel in many indoor set 20A, 20B, 20C, the 20D of off-premises station 10, connects refrigerant tubing between described many indoor set 20A, 20B, 20C, 20D and off-premises station 10.
Described off-premises station 10 comprises compressor 11, cross valve 12, outdoor heat converter 13, outdoor fan 14, corresponds respectively to four electric expansion valves (15A, 15B, 15C, 15D) and the reservoir 16 of four indoor sets (20A, 20B, 20C, 20D).Each indoor set (20A, 20B, 20C, 20D) comprises indoor heat converter (21A, 21B, 21C, 21D) and indoor fan (22A, 22B, 22C, 22D) and Tube Temperature Sensor (23A, 23B, 23C, 23D) respectively.
Described compressor 11 is an inverter compressor, is used for the low-temp low-pressure gaseous refrigerant being compressed into the high temperature and high pressure gas state and discharging.
Described cross valve 12 has two autonomous channels, deliver to indoor heat converter (21A, 21B, 21C, 21D) with the high temperature and high pressure gaseous refrigerant that is used for compressor 11 being discharged when the heating operation, and when refrigerating operaton, be sent to outdoor heat converter 13, and carry out the on/off switch operation according to user-selected refrigerating operaton and heating operation pattern and change refrigerant flow direction.
Described outdoor heat converter 13 makes high temperature and high pressure gaseous refrigerant be condensed into the normal temperature high voltage liquid condition as condenser (condenser) when the refrigerating operaton pattern, and when the heating operation pattern, make the low-temp low-pressure liquid refrigerant flash to gaseous refrigerant, thereby carry out heat exchange with surrounding air corresponding to enthalpy (enthalpy) change of cold-producing medium as evaporimeter (evaporator).
Described outdoor fan 14 promotes cold-producing medium mobile in outdoor heat converter 13 and the heat exchange between the air, to improve the heat-exchange capacity of off-premises station 10.
Described electric expansion valve (15A, 15B, 15C, 15D) is located between outdoor heat converter 13 and the indoor heat converter (21A, 21B, 21C, 21D), the two phase refrigerant that the liquid component that the normal temperature high voltage liquid refrigerant that is used for will be after a certain side is condensed flowing into is expanded to low-temp low-pressure and gas componant are mixed mutually and it is reduced pressure.
Described reservoir 16 is located at the suction side of compressor 11, and the cold-producing medium that is used for being inhaled into compressor 11 is transformed to the gaseous state cold-producing medium fully.
(21A, 21B, 21C, 21D) is opposite with outdoor heat converter 13 for described indoor heat converter, moves as evaporimeter during as condenser operation and at refrigerating operaton when heating operation, carries out heat exchange with surrounding air thus.
Described indoor fan (22A, 22B, 22C, 22D) promotes cold-producing medium mobile in indoor heat converter (21A, 21B, 21C, 21D) and the heat exchange action between the air, produces required cold wind of the interior space or warm braw simultaneously.
Described Tube Temperature Sensor (23A, 23B, 23C, 23D) is used to monitor the inlet temperature of the indoor heat converter (21A, 21B, 21C, 21D) that plays the evaporimeter effect when refrigerating operaton for being located at the temperature sensor of indoor heat converter (21A, 21B, 21C, 21D) entrance side.Be used for checking that off-premises station 10 is connected the refrigeration piping checking mode of situation with the pipeline between each indoor set (20A, 20B, 20C, 20D), described Tube Temperature Sensor (23A, 23B, 23C, 23D) is monitored the variation of the inlet duct temperature of each indoor heat converter (21A, 21B, 21C, 21D) with the aperture generation of electric expansion valve (15A, 15B, 15C, 15D).
Have in the air conditioner of said structure, switch cross valve 12 according to user's selection when refrigerating operaton and heating operation pattern and change refrigerant flow direction.
For example, cross valve 12 is opened during heating operation, and cold-producing medium forms kind of refrigeration cycle with the sequential loop of compressor 11 → cross valve 12 → indoor heat converter (21A, 21B, 21C, 21D) → electric expansion valve (15A, 15B, 15C, 15D) → outdoor heat converter 13 → cross valve 12 → reservoir 16 → compressor 11 along the dotted arrow direction of Fig. 1.
On the contrary, cross valve 12 is closed during refrigerating operaton, and cold-producing medium forms kind of refrigeration cycle with the sequential loop of compressor 11 → cross valve 12 → outdoor heat converter 13 → electric expansion valve (15A, 15B, 15C, 15D) → indoor heat converter (21A, 21B, 21C, 21D) → cross valve 12 → reservoir 16 → compressor 11 along the solid arrow direction of Fig. 1.
The multi-connected air conditioner pipeline that Fig. 2 is provided for the foundation embodiment of the invention connects the control structure figure of testing fixture, except the device shown in Fig. 1, also comprise input part 30, control part 32, driven compressor portion 34, outdoor fan drive division 36, indoor fan drive division 38, valve drive division 40 and display part 42.
Described input part 30 is used for carrying out in the initial installation of multi-connected air conditioner or mobile time input the operation signal of refrigeration piping checking mode, is located at usually on the off-premises station 10 so that installation personnel is operated.
Described control part 32 is to receive user instruction and microcomputer of controlling each device in off-premises station 10 and the Duo Tai indoor set (20A, 20B, 20C, 20D).In refrigeration piping checking mode (utilizing refrigerating operaton to check that pipeline connects the pattern of situation), as corresponding each indoor set (20A, 20B, 20C, electric expansion valve (15A 20D), 15B, 15C, aperture 15D) changes each the indoor heat converter (21A that causes, 21B, 21C, 21D) the inlet duct temperature difference is in predefined certain temperature range (about 4 ℃～less than 8 ℃) when interior, control part 32 changes (being specially increase) described compressor 11 frequencies and checks once more that by refrigerating operaton pipeline connects situation, thereby prevents to carry out the indoor set (20A of pipe inspection in advance, 20B, 20C, contingent pipe inspection mistake when 20D) volume is big.
Described driven compressor portion 34 controls the driving of compressor 11 according to the compressor control signal of control part 32, outdoor fan drive division 36 is according to the driving of the outdoor fan control signal control room external fan 14 of control part 32, and indoor fan drive division 38 is according to the driving of the indoor fan control signal control room internal fan (22A, 22B, 22C, 22D) of control part 32.
Described valve drive division 40 is according to the valve control signal control cross valve 12 of control part 32, the driving of electric expansion valve (15A, 15B, 15C, 15D), and display part 42 is checked state and error pattern etc. according to the refrigeration piping of the display control signal demonstration multi-connected air conditioner of control part 32.
The following describes the course of work and action effect that aforesaid multi-connected air conditioner pipeline connects testing fixture and method thereof.
Fig. 3 a and Fig. 3 b are the flow chart that multi-connected air conditioner pipeline provided by the present invention connects inspection method.
Primary condition is: multi-connected air conditioner of the present invention connects four indoor sets (20A, 20B, 20C, 20D) on an off-premises station 10, and is in fully the pressure balance (with reference to figure 4) of opening (480 step (step)) state and keeping coolant channel corresponding to electric expansion valve (15A, 15B, 15C, the 15D) aperture of each indoor set (20A, 20B, 20C, 20D).
If in order to check that in the initial installation of multi-connected air conditioner or when mobile off-premises station 10 is connected situation with the pipeline of indoor set (20A, 20B, 20C, 20D), usually be located at the refrigeration piping review button of off-premises station 10 by the installation personnel operation, then the operation signal of refrigeration piping review button is imported into control part 32, and control part 32 judges whether to be refrigeration piping checking mode (S100) in view of the above.
If refrigeration piping checking mode, then control part 32 checks that in order to utilize refrigerating operaton off-premises station 10 is connected situation with the pipeline of indoor set (20A, 20B, 20C, 20D), as shown in Figure 4, close cross valve 14 and make kind of refrigeration cycle switch to refrigerating operaton (S102), the indoor fan (22A, 22B, 22C, 22D) that meanwhile moves outdoor fan 14 and all indoor sets (20A, 20B, 20C, 20D) (S104).
And, control part 32 is monitored the pipe temperature E1 of all indoor sets (20A, 20B, 20C, 20D), i.e. indoor heat converter (21A, 21B, 21C, 21D) inlet temperature (S106) by the Tube Temperature Sensor (23A, 23B, 23C, 23D) that is located at each indoor set (20A, 20B, 20C, 20D).As shown in Figure 4, for a certain indoor set from indoor set (20A, 20B, 20C, 20D) begins to carry out pipe inspection, to carry out indoor set (some among 20A, 20B, 20C, the 20D of pipe inspection, 20A for example) electric expansion valve (some among 15A, 15B, 15C, the 15D, 15A for example) aperture was opened for for 170 steps, and closed other electric expansion valves (remaining 15B, 15C, 15D among 15A, 15B, 15C, the 15D) aperture (S108).
Then, through being used to protect after the scheduled time t1 of compressor 11, as shown in Figure 4,, thereby make the indoor set (for example 20A) that carries out pipe inspection carry out refrigerating operaton (S110) with pipe inspection mode frequency (20Hz) operation compressor 11.
After described compressor 11 operations, as shown in Figure 4, when (checking the required running time of checking in most advanced line pipe road of indoor set pipeline connection situation through the predefined very first time, about 3 minutes 50 seconds) time (S112), for the pipe temperature of verifying the indoor set 20A that (check) be checked changes, monitor the pipe temperature E2 that changes after the electric expansion valve 15A that opens corresponding to indoor set 20A by the Tube Temperature Sensor 23A that is located on the indoor set 20A that is checked, and be input to control part 32 (S114).
Thereupon, described control part 32 calculate the pipe temperature E1 of indoor set 20A before electric expansion valve 15A opens that carry out pipe inspection and open after the difference Δ Ea (S116) of pipe temperature E2, and judge whether the pipe temperature difference Δ Ea calculate exceeds predefined benchmark temperature difference Es (pipeline connect open that electric expansion valve carries out refrigerating operaton when all right and the minimum tube channel temp that causes is poor, be about 8 ℃) (S118).
Exceed benchmark temperature difference Es if the judged result of described S118 is the pipe temperature difference Δ Ea that is calculated, then control part 32 judges that the pipeline connection of the indoor set 20A that carries out pipe inspection is all right, and finishes the pipe inspection (S132) to indoor set 20A.
In addition, if being the pipe temperature difference Δ Ea that is calculated, the judged result of described S118 do not exceed benchmark temperature difference Es, then control part 32 is considered the bigger situation of indoor set 20A volume of carrying out pipe inspection and is judged whether the pipe temperature difference Δ Ea that calculates exceeds and reexamine temperature difference Em (though that pipeline connects is all right, but when the indoor set volume is big, open that electric expansion valve carries out refrigerating operaton and the pipe temperature that causes is poor, be about 4 ℃) (S120).
Do not exceed and reexamine temperature difference Em if the judged result of described S120 is the pipe temperature difference Δ Ea that calculated, then control part 32 is judged the pipeline bad connection of the indoor set 20A that carries out pipe inspection, and sends the pipe inspection rub-out signal (S140) of indoor set 20A.
In addition, exceed and reexamine temperature difference Em if the judged result of described S120 is the pipe temperature difference Δ Ea that calculated, then might be that the pipeline that belongs to the indoor set 20A that carries out pipe inspection connects good, but the situation that volume is bigger, therefore control part 32 reexamines mode frequency (25Hz) operation compressor 11 with compressor 11 frequencies raising 5Hz with pipeline, is used for thus checking once more that the pipeline of indoor set 20A connects the refrigerating operaton (S122) of situation.
Described compressor 11 changes after the frequency operation, when (checking the required running time of indoor set pipeline connection situation of carrying out pipe inspection once more through predefined second time, about 2 minutes) time (S124), for the pipe temperature of verifying the indoor set 20A that is checked changes, Tube Temperature Sensor 23A monitoring by the indoor set 20A that carries out pipe inspection changes the pipe temperature E3 that changes after compressor 11 running frequencies, and is input to control part 32 (S126).
Thereupon, described control part 32 is calculated the pipe temperature E1 of indoor set 20A before electric expansion valve 15A opens that carries out pipe inspection and the difference Δ Eb (S128) that changes compressor 11 running frequencies pipe temperature E3 afterwards, and judges whether the pipe temperature difference Δ Eb that calculates exceeds predefined benchmark temperature difference Es (S130).
Exceed benchmark temperature difference Es if the judged result of described S130 is the pipe temperature difference Δ Eb that is calculated, then control part 32 judges that the pipeline connection of the indoor set 20A that carries out pipe inspection is all right, and finishes the pipe inspection (S132) to indoor set 20A.
In addition, if being the pipe temperature difference Δ Eb that is calculated, the judged result of described S130 do not exceed benchmark temperature difference Es, then control part 32 is judged the pipeline bad connection of the indoor set 20A that carries out pipe inspection, and sends the pipe inspection rub-out signal (S140) of indoor set 20A.
As mentioned above, whether the pipeline of judging the described indoor set 20A that carries out pipe inspection connects well or whether the generator tube road is checked after the mistake, control part 32 is judged all indoor set (20A, 20B, 20C, whether pipe inspection 20D) finishes (S134), as all indoor set (20A, 20B, 20C, when pipe inspection 20D) all finishes, as shown in Figure 4, close compressor 11, outdoor fan 14 and indoor fan (22A, 22B, 22C, 22D) (S136), and open fully corresponding to indoor set (20A, 20B, 20C, all electric expansion valve (15A 20D), 15B, 15C, aperture 15D) and power cut-off (S138).
In addition, if the judged result of described S134 is all indoor set (20A, 20B, 20C, pipe inspection 20D) does not finish, then control part 32 is after the pipe inspection that finishes a certain indoor set 20A, in order to begin to next indoor set (20A, 20B, 20C, some among the 20D, 20B for example) carries out pipe inspection, as shown in Figure 4, next is carried out the electric expansion valve (15A of the indoor set 20B of pipe inspection, 15B, 15C, some among the 15D, 15B for example) aperture was opened for for 170 steps, and closed all the other electric expansion valve (15A, 15B, 15C, remaining 15A among the 15D, 15C, 15D) aperture (S142).
At this moment, do not close the electric expansion valve 15A aperture of the indoor set 20A that before carries out pipe inspection at once, but through closing again afterwards predetermined time delay (about 10 seconds), so that next cold-producing medium circulation of carrying out the indoor set 20B of pipe inspection is easy to carry out.And the running frequency of compressor 11 returns to the initial stage pipe inspection mode frequency (20Hz) before changing, and connects situation (S144) thereby carry out refrigerating operaton with the pipeline of checking the indoor set 20B that next carries out pipe inspection.
For being carried out pipe inspection, next indoor set 20B moves after the compressor 11, when (checking the required running time of pipeline connection situation of the indoor set that next carries out pipe inspection through predefined the 3rd time, about 2 minutes) time (S146), for the pipe temperature of verifying next indoor set 20B that carries out pipe inspection changes and returns described S114 and carry out subsequent action.
As mentioned above, the present invention is being used to check off-premises station 10 and indoor set (20A, 20B, 20C, pipeline 20D) connects in the refrigeration piping checking mode of situation, as indoor set (20A, 20B, 20C, some among the 20D) pipe temperature changes less and is difficult to judge is pipeline bad connection or indoor set (20A, 20B, 20C, when some among the 20D) volume is big, add operation by improving compressor 11 frequencies, thereby prevent in advance to off-premises station 10 and indoor set (20A, 20B, 20C, contingent mistake when 20D) carrying out pipe inspection.
In sum, pipeline according to multi-connected air conditioner provided by the present invention connects testing fixture and method thereof, checking that by refrigerating operaton the pipeline of off-premises station and Duo Tai indoor set is connected in the refrigeration piping checking mode of situation, if the pipe temperature difference behind the prestart is within certain temperature range, then change compressor frequency and reexamine pipeline and connect situation, thus contingent pipe inspection mistake can avoid the indoor set volume big the time.
Claims (10)
1. the pipeline of a multi-connected air conditioner connects inspection method, this multi-connected air conditioner has off-premises station and carries out many indoor sets that the multitube road is connected with described off-premises station, and be provided with a plurality of electric expansion valves that correspond respectively to described many indoor sets, it is characterized in that checking that described off-premises station comprises step when being connected situation with Duo Tai indoor set pipeline:
Operation compressor when the electric expansion valve that corresponds respectively to described many indoor sets is opened;
Each indoor set pipe temperature before and after detection is opened by the caused electric expansion valve of the operation of described compressor is poor;
Detected pipe temperature difference and predefined fiducial temperature are compared, when described pipe temperature difference is in the reference temperature range, change the running frequency of described compressor;
The operation caused indoor set pipe temperature of detection after by described compressor converted frequency conversion rate is poor, checks that with this pipeline connects situation and whether well makes described many indoor sets and electric expansion valve be complementary.
2. the pipeline of multi-connected air conditioner according to claim 1 connects inspection method, it is characterized in that: when the electric expansion valve that corresponds respectively to described many indoor sets is opened, move in the step of compressor, only open electric expansion valve corresponding to a certain indoor set, to be used for a certain indoor set supply cold-producing medium, move described compressor with predefined pipe inspection mode frequency simultaneously to described many indoor sets.
3. the pipeline of multi-connected air conditioner according to claim 1 connects inspection method, it is characterized in that: in the step that detects each indoor set pipe temperature difference of opening front and back by the caused electric expansion valve of the operation of described compressor, carry out refrigerating operaton and move under the state of all indoor machine fans at described off-premises station, only open electric expansion valve, change to detect the indoor set pipe temperature and the indoor set pipe temperature of electric expansion valve after opening of described electric expansion valve before opening corresponding to a certain indoor set in described many indoor sets.
4. the pipeline of multi-connected air conditioner according to claim 1 connects inspection method, it is characterized in that: described reference temperature range be about 4 ℃～less than 8 ℃.
5. the pipeline of multi-connected air conditioner according to claim 4 connects inspection method, it is characterized in that: in the step that changes described compressor operating frequency, described compressor frequency is improved preset frequency and appends the refrigerating operaton that carries out each indoor set is carried out pipe inspection.
6. the pipeline of multi-connected air conditioner according to claim 5 connects inspection method, and it is characterized in that: described preset frequency is more than the 5Hz.
7. the pipeline of multi-connected air conditioner according to claim 1 connects inspection method, it is characterized in that: checking that pipeline connects in the step whether situation make well that described many indoor sets and electric expansion valve be complementary, detect described electric expansion valve and open the poor of preceding indoor set pipe temperature and described compressor change running frequency indoor set pipe temperature afterwards, and the detected pipe temperature difference and the predefined benchmark temperature difference compared, when described pipe temperature difference during more than or equal to the benchmark temperature difference, the pipeline that is judged as described indoor set connects all right, when described pipe temperature difference during less than the benchmark temperature difference, send the pipe inspection rub-out signal of described indoor set, thereby check that described many indoor set pipelines connect situation.
8. the pipeline of a multi-connected air conditioner connects testing fixture, comprises:
Off-premises station;
Carry out many indoor sets that the multitube road is connected with described off-premises station;
Correspond respectively to a plurality of electric expansion valves of described many indoor sets;
The compressor of operation when the electric expansion valve that corresponds respectively to described many indoor sets is opened; And
Control part, with be used to detect described electric expansion valve open before and after each indoor set pipe temperature poor, and detected pipe temperature difference and predefined fiducial temperature compared, when described pipe temperature difference is in the reference temperature range, change the running frequency of described compressor, to check that pipeline connects situation and whether well makes described many indoor sets and electric expansion valve be complementary.
9. the pipeline of multi-connected air conditioner according to claim 8 connects testing fixture, it is characterized in that: described control part is only opened the electric expansion valve corresponding to a certain indoor set in described many indoor sets in refrigerating operaton, simultaneously move described compressor with predefined pipe inspection mode frequency, detect indoor set pipe temperature and electric expansion valve the indoor set pipe temperature open after of described electric expansion valve before opening thus and change, thereby check that described off-premises station is connected situation with the pipeline of Duo Tai indoor set.
10. the pipeline of multi-connected air conditioner according to claim 9 connects testing fixture, it is characterized in that: described control part appends the refrigerating operaton that improves described compressor frequency when described pipe temperature difference is in the reference temperature range, and detect described electric expansion valve and open preceding indoor set pipe temperature and the indoor set pipe temperature variation afterwards of described compressor change running frequency, check that with this described off-premises station is connected situation with the pipeline of Duo Tai indoor set.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070008645 | 2007-01-27 | ||
| KR10-2007-0008645 | 2007-01-27 | ||
| KR1020070008645A KR101270540B1 (en) | 2007-01-27 | 2007-01-27 | Apparatus for inspecting refrigerant pipe connection of multi pipe air conditioner and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101231016A true CN101231016A (en) | 2008-07-30 |
| CN101231016B CN101231016B (en) | 2011-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100963269A Active CN101231016B (en) | 2007-01-27 | 2007-04-10 | Device and method for connecting and detecting pipe of multi-connected air conditioner |
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| Country | Link |
|---|---|
| KR (1) | KR101270540B1 (en) |
| CN (1) | CN101231016B (en) |
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| CN103292430A (en) * | 2012-03-01 | 2013-09-11 | 三菱电机株式会社 | Multiple-unit air conditioning apparatus |
| CN103424244A (en) * | 2012-05-22 | 2013-12-04 | 珠海格力电器股份有限公司 | Outdoor unit valve detection method of variable-frequency multi-connected air conditioner and variable-frequency multi-connected air conditioner |
| CN103575514A (en) * | 2012-07-26 | 2014-02-12 | 珠海格力电器股份有限公司 | Air conditioner and detection method and device thereof |
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| KR100382504B1 (en) * | 2001-05-19 | 2003-05-09 | 엘지전자 주식회사 | Pipe-search-Methode of multi type air-conditioner |
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2007
- 2007-01-27 KR KR1020070008645A patent/KR101270540B1/en active IP Right Grant
- 2007-04-10 CN CN2007100963269A patent/CN101231016B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20080070789A (en) | 2008-07-31 |
| CN101231016B (en) | 2011-05-25 |
| KR101270540B1 (en) | 2013-06-03 |
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