CN106288027A - Air-conditioner outdoor unit and the control method of air-conditioner outdoor unit - Google Patents
Air-conditioner outdoor unit and the control method of air-conditioner outdoor unit Download PDFInfo
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- CN106288027A CN106288027A CN201510240882.3A CN201510240882A CN106288027A CN 106288027 A CN106288027 A CN 106288027A CN 201510240882 A CN201510240882 A CN 201510240882A CN 106288027 A CN106288027 A CN 106288027A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 207
- 239000002826 coolant Substances 0.000 claims abstract description 99
- 239000003507 refrigerant Substances 0.000 claims abstract description 88
- 238000012544 monitoring process Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 36
- 238000004378 air conditioning Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims 1
- 230000011664 signaling Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 230000008016 vaporization Effects 0.000 description 9
- 238000009834 vaporization Methods 0.000 description 7
- 238000009841 combustion method Methods 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/08—Compressors specially adapted for separate outdoor units
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses the control method of a kind of air-conditioner outdoor unit and air-conditioner outdoor unit, wherein, air-conditioner outdoor unit includes compressor and the gas-liquid separator being connected with the air inlet of compressor；Air-conditioner outdoor unit also includes the heater being located in the cavity volume of gas-liquid separator, is located in cavity volume so that whether monitoring coolant liquid level exceedes the liquid level alarm of predeterminated position, is located at the exhaust ports of compressor with the temperature sensor of detection refrigerant temperature and the controller that is connected with liquid level alarm, temperature sensor, the corresponding port of heater, and controller can control heater in conjunction with the information of liquid level alarm and temperature sensor acquisition and work under different capacity.The present invention has the effect of accurate and efficient control heater.
Description
Technical field
The present invention relates to field of household appliances, particularly relate to the control method of air-conditioner outdoor unit and air-conditioner outdoor unit.
Background technology
Compressor is the heart of air-conditioner, is used for producing power drive refrigerant circulation.Compressor operationally can only compressed gaseous coolant, it is impossible to compressed liquid coolant, and liquid refrigerants can damage compressor after entering compressor, even causes compression machine burning machine.Can arrange a gas-liquid separator in order to avoid coolant enters compressor, the generally import at compressor, the bottom storage liquid refrigerants of this gas-liquid separator, top has gas outlet and flows out for gaseous coolant.In order to avoid the liquid level of the liquid coolant in gas-liquid separator is too high, heater can be installed in gas-liquid separator, by coolant being heated the liquid level controlling coolant.
But the determination methods of the work controlling heater of existing air-conditioner outdoor unit is coarse, causes described heater accurately and efficiently not work.
Summary of the invention
Present invention is primarily targeted at a kind of air-conditioner outdoor unit of offer and the control method of air-conditioner outdoor unit, it is intended to accurately and efficiently control heater.
The air-conditioner outdoor unit that the present invention provides, the gas-liquid separator that the air inlet including compressor with described compressor is connected；Described air-conditioner outdoor unit also includes the heater being located in the cavity volume of described gas-liquid separator, is located in described cavity volume so that whether monitoring coolant liquid level exceedes the liquid level alarm of predeterminated position, is located at the exhaust ports of described compressor with the temperature sensor of detection refrigerant temperature and the controller that is connected with described liquid level alarm, temperature sensor, the corresponding port of heater, and the information that described controller combines described liquid level alarm and temperature sensor obtains works to control described heater.
Preferably, described liquid level alarm includes being located in described cavity volume for detecting the ball float of liquid level and producing liquid level and exceed standard the mounting seat of signal, described ball float is when described coolant liquid level being detected higher than predeterminated position, and exceed standard signal by triggering mounting seat generation liquid level.
Preferably, described heater includes that primary heater and secondary heater, described primary heater are located at the bottom of described gas-liquid separator, and described secondary heater is located between described predeterminated position and described primary heater.
Preferably, described air-conditioner outdoor unit also includes the variable frequency drives for monitoring described compressor operating frequency, the corresponding port of described variable frequency drives is connected with described controller, and described control can control the work of described heater in conjunction with the information that described liquid level alarm, temperature sensor and variable frequency drives obtain.
Present invention also offers the control method of a kind of air-conditioner outdoor unit, described air-conditioner outdoor unit includes the gas-liquid separator that compressor and the air inlet with described compressor are connected；Described air-conditioner outdoor unit also includes the heater being located in the cavity volume of described gas-liquid separator, is located at whether described cavity volume is interior exceedes the liquid level alarm of predeterminated position with monitoring coolant liquid level, be located at the exhaust ports of described compressor to detect temperature sensor and the controller of refrigerant temperature, it is characterized in that, the control method of described air-conditioner outdoor unit includes step:
Controller obtains refrigerant temperature and the low temperature threshold A preset and high temperature threshold value B of the exhaust ports of described compressor；
Controller is according to described refrigerant temperature and low temperature threshold A and the size comparison result of high temperature threshold value B, and whether detect that described liquid level exceeds standard signal, control heater work, by described liquid level alarm, the described liquid level signal that exceeds standard detects that coolant liquid level sends when exceeding predeterminated position.
Preferably, described controller is according to described refrigerant temperature and low temperature threshold A and the size comparison result of high temperature threshold value B, and whether detects that described liquid level exceeds standard signal, and the step controlling heater work includes:
When acquired refrigerant temperature is more than described high temperature threshold value B, controller controls heater and stops heating；
When acquired refrigerant temperature is less than described low temperature threshold A, controller judges whether to detect that described liquid level exceeds standard signal；
When detect described liquid level exceed standard signal time, controller control heater set high-power mode under in described gas-liquid separator coolant heat；
When be not detected by described liquid level exceed standard signal time, controller control heater set low-power mode under in described gas-liquid separator coolant heat；Or
When acquired refrigerant temperature is between described low temperature threshold A and high temperature threshold value B, controller judges whether to detect that described liquid level exceeds standard signal；
When detect described liquid level exceed standard signal time, controller control heater at low power modes in described gas-liquid separator coolant heat；
When be not detected by described liquid level exceed standard signal time, controller control heater stop heating.
Preferably, determining that acquired refrigerant temperature less than described low temperature threshold A and detects that described liquid level exceeds standard after signal, before described controller controls the step that the coolant in described gas-liquid separator is heated by heater in high-power mode, the control method of described air-conditioner outdoor unit further comprises the steps of:
Controller obtains the refrigerant temperature Tpo before the current refrigerant temperature Tpn of exhaust ports of described compressor and Preset Time, it is judged that whether described Tpn is more than described Tpo；
When described Tpn is more than described Tpo, and the most described controller controls heater and heats the coolant in described gas-liquid separator at low power modes；
When described Tpn is less than described Tpo, then performs described controller and control the step that the coolant in described gas-liquid separator is heated by heater in high-power mode.
Preferably, determining that acquired refrigerant temperature and is not detected by described liquid level and exceeds standard after signal between described low temperature threshold A and high temperature threshold value B, before described controller controls the step of heater stop heating, the control method of described air-conditioner outdoor unit further comprises the steps of:
Controller obtains the refrigerant temperature Tpo before the current refrigerant temperature Tpn of exhaust ports of described compressor and Preset Time, it is judged that whether described Tpn is more than described Tpo；
When described Tpn is less than described Tpo, then controller controls heater at low power modes to the coolant heating in described gas-liquid separator；
When described Tpn is more than described Tpo, then performs described controller and control the step of heater stop heating.
Preferably, described air-conditioner outdoor unit also includes the variable frequency drives for monitoring described compressor operating frequency, controller obtain gas-liquid separator gas outlet at refrigerant temperature and preset low temperature threshold A and high temperature threshold value B step before, the control method of described air-conditioner outdoor unit further comprises the steps of:
Controller obtains the operating frequency of compressor and default frequency threshold, it is judged that whether described operating frequency is less than described frequency threshold；
When acquired operating frequency is less than described frequency threshold, controller obtains the refrigerant temperature at the gas outlet of gas-liquid separator and the low temperature threshold A preset；
When the refrigerant temperature obtained is higher than described low temperature threshold A, controller controls heater stop heating；
When the refrigerant temperature obtained is less than described low temperature threshold A, controller judges whether to detect that described liquid level exceeds standard signal；
When be not detected by described liquid level exceed standard signal time, controller control heater stop heating；
When detect described liquid level exceed standard signal time, controller control heater in described gas-liquid separator coolant heat；
When acquired operating frequency is more than described frequency threshold, performs described controller and obtain the refrigerant temperature at the gas outlet of gas-liquid separator and the low temperature threshold A preset and the step of high temperature threshold value B.
Preferably, described heater includes primary heater and secondary heater, and described secondary heater is between primary heater and described predeterminated position；When described heater works at low power modes, one of primary heater and secondary heater work, when described heater works in high-power mode, and primary heater and secondary heater associated working.
Air-conditioner outdoor unit provided by the present invention and the control method of air-conditioner outdoor unit, by arranging the temperature sensor of detection refrigerant temperature in the exhaust ports of compressor, liquid level alarm and heater are set in the cavity volume of gas-liquid separator, and, controller is when the information judging that temperature sensor and liquid level alarm obtain reaches pre-conditioned, control heater to work under different capacity, such that it is able to play accurate and efficient heater, and then reach the effect of the liquid level of coolant in accurate and efficient control cavity volume.
Accompanying drawing explanation
Fig. 1 is the systematic schematic diagram of air-conditioner outdoor unit one embodiment of the present invention；
Fig. 2 is the cross-sectional schematic of gas-liquid separator in Fig. 1；
Fig. 3 is the flow chart of the control method first embodiment of air-conditioner outdoor unit of the present invention；
Fig. 4 is the flow chart of step S200 in Fig. 3；
Fig. 5 is the flow chart of control method second embodiment of air-conditioner outdoor unit of the present invention；
Fig. 6 is the flow chart of control method the 3rd embodiment of air-conditioner outdoor unit of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further referring to the drawings.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of air-conditioner outdoor unit.
Fig. 1 to Fig. 2 shows an embodiment of air-conditioner outdoor unit of the present invention.Wherein, Fig. 1 is the principle schematic of air-conditioner outdoor unit of the present invention；Fig. 2 is the structural representation of gas-liquid separator in Fig. 1.
The air-conditioner outdoor unit that the present embodiment is provided, described air-conditioner outdoor unit, in addition to including the assembly such as cross valve, heat exchanger, also includes the gas-liquid separator 2 that compressor 1 and the air inlet with described compressor 1 are connected.The gaseous coolant of low-pressure low-temperature exports from the air vent of compressor 1 after compressor compresses.Coolant through circulation will enter gas-liquid separator 2, and gas-liquid separator 2 is for separating the coolant of gas-liquid mixed state, and precipitates liquid refrigerants, it is ensured that export gaseous coolant to compressor 1.
Described air-conditioner outdoor unit also includes heater, liquid level alarm 5, temperature sensor 6 and controller (not shown).Wherein, heater is located in the cavity volume 21 of described gas-liquid separator 2, operationally to heat coolant.Whether liquid level alarm 5 exceedes predeterminated position with monitoring coolant liquid level in being located at described cavity volume 21.Temperature sensor 6 is located at the exhaust ports of described compressor 1 to detect refrigerant temperature.Controller is connected with the corresponding port of described liquid level alarm 5, temperature sensor 6 and heater, and described controller can control described heater in conjunction with the information that described liquid level alarm 5 and temperature sensor 6 obtain and work under different capacity.
The air-conditioner outdoor unit that the present embodiment is provided, by arranging the temperature sensor 6 of detection refrigerant temperature in the exhaust ports of compressor 1, liquid level alarm 5 and heater are set in the cavity volume 21 of gas-liquid separator 2, and, controller, when the information judging that temperature sensor 6 and liquid level alarm 5 obtain reaches pre-conditioned, controls heater and works under different capacity.Such that it is able to play accurate and efficient computer heating control, and then reach the effect of the liquid level of coolant in accurate and efficient control cavity volume 21.
Preferably, described liquid level alarm 5 includes being located in described cavity volume 21 in order to detect the ball float 51 of liquid level and to produce liquid level and exceed standard the mounting seat 52 of signal, when described ball float 51 detects that liquid level reaches predeterminated position, triggering mounting seat 52 is produced liquid level and exceeds standard signal.Concrete, described ball float 51 can be affixed to this predetermined position, and when liquid level reaches this predeterminated position (touching ball float 51), triggering mounting seat 52 is produced described liquid level and exceeds standard signal by ball float 51.It is understandable that, described ball float 51 alternatively floats on coolant liquid level, and is fixed with a connecting rod (not shown), when liquid level reaches predeterminated position, corresponding drive ball float 51 and connecting rod thereon to float up to contact with mounting seat 52, thus trigger mounting seat 52 and produce liquid level and exceed standard signal.The liquid level alarm 5 that the present embodiment is provided judges the height of coolant liquid level by ball float 51, has simple in construction and highly reliable effect.Certainly, in other embodiments, it would however also be possible to employ light sensor or other sensors detect the liquid level of coolant, and produce liquid level during in order to exceed predeterminated position at liquid level coolant being detected to exceed standard signal.
Preferably, described heater includes primary heater 3 and secondary heater 4.Described primary heater 3 is located at the bottom of described gas-liquid separator 2, and described secondary heater 4 is located between described predeterminated position and described primary heater 3.On the one hand, by primary heater 3 and secondary heater 4 being arranged on different positions, then the coolant of different liquid levels can be heated, reach different heats.Such as, the liquid level higher depth at coolant heats, then heat is absorbed equably by coolant and makes coolant bulk temperature synchronize to improve；And heat at the shallower place of liquid level of coolant, then heat is more concentrated, and makes the coolant fast vaporizing of local.On the other hand, the power of heater is controlled compared to control electric current, in the present embodiment, the combination that heater can be turned on and off by primary heater 3 and secondary heater 4 opens and closes regulates power, it is achieved so circuit structure of function is relatively simple and stable.Controller, when controlling, can heat by controlling the one of primary heater 3 and secondary heater 4, thus complete machine is with low-power heating；Controller can also control two heaters and heat simultaneously, thus complete machine is with high-power heating.
Certainly, further, arrange primary heater 3 different with the power of secondary heater 4, then complete machine is when small-power heats, it is also possible to is further divided into minimum power and time low-power heating, thus increases the rich of complete machine work.
Preferably, described air-conditioner outdoor unit also includes the variable frequency drives (not shown) for monitoring described compressor 1 running frequency, the corresponding port of described controller is connected with described controller, and described control can control described primary heater 3 in conjunction with the information that described liquid level alarm 5, temperature sensor 6 and variable frequency drives obtain and secondary heater 4 works alone or in combination.By setting up this variable frequency drives, and combine the running frequency of compressor 1 to control the operation of heater, such that it is able to be more accurately controlled the liquid level of coolant.
The air-conditioner outdoor unit that the present embodiment is provided, has multiple monitoring scheme and is positioned at the heater of diverse location, then can reach more comprehensively, efficient and energy-conservationly control the effect of the height of coolant.
Present invention also offers the control method of a kind of air-conditioner outdoor unit.Fig. 3 shows the schematic flow sheet of an embodiment of the control method of a kind of air-conditioner outdoor unit.
In the present embodiment, describing in detail as a example by using the air-conditioner outdoor unit in above-described embodiment, the control method of described air-conditioner outdoor unit includes step:
Step S100, controller obtains the refrigerant temperature Tp of exhaust ports, default low temperature threshold A and default high temperature threshold value B of described compressor 1.
Step S200, controller is according to described refrigerant temperature Tp and low temperature threshold A and the size comparison result of high temperature threshold value B, and according to whether detect described liquid level and exceed standard signal, control primary heater 3 and/or secondary heater 4 works, wherein, by liquid level alarm 5, the described liquid level signal that exceeds standard detects that coolant liquid level sends when exceeding predeterminated position.
In order to overcome technical problem mentioned in background technology, in the present embodiment, both detected refrigerant temperature Tp, and detected whether again to obtain liquid level and exceed standard signal, judging whether to heating further according to the two signal and how to heat, such process is so that control more accurate.Such as, when refrigerant temperature Tp temperature is less than low temperature threshold A, then representing now coolant liquid level will quickly increase, now can be according to whether detect that liquid level exceeds standard signal to determine whether primary heater 3 and secondary heater 4 are operated；And when refrigerant temperature Tp is higher than high temperature threshold value B, then represent coolant liquid level quickly to reduce, now can also be according to whether detect that the liquid level signal that exceeds standard, to determine whether primary heater 3 and secondary heater 4 are operated, thus reaches accurately to control the effect of coolant liquid level.
Refer to Fig. 4, in the present embodiment, it is preferable that described step S200 includes:
Step S201, it is judged that Tp >=B, Tp ＜ A or A≤Tp ＜ B, when acquired refrigerant temperature Tp is more than described high temperature threshold value B, performs step S202；When acquired refrigerant temperature Tp is less than described low temperature threshold A, perform step S203；When acquired refrigerant temperature Tp is between described low temperature threshold A and high temperature threshold value B, perform step S206.
Step S202, controller controls primary heater 3 and stops heating, and secondary heater 4 stops heating.
When refrigerant temperature Tp is more than described high temperature threshold value B, representing now coolant liquid level will quickly reduce, it is common that will not produce coolant liquid level too high and produce and pour in the phenomenon of compressor, then primary heater 3 and secondary heater 4 can stop heating.Certainly, in other embodiments, if detecting further, liquid level exceeds standard signal, then or primary heater 3 and/or secondary heater 4 can be kept to heat, so that coolant liquid level reduces more quickly.
Step S203, controller judges whether to detect that described liquid level exceeds standard signal, when detect described liquid level exceed standard signal time, then perform step S204；When be not detected by liquid level exceed standard signal time, perform step S205.
Step S204, controller controls primary heater 3 and secondary heater 4 is combined the coolant heating in described gas-liquid separator 2.
Step S205, controller controls primary heater 3 and heats the coolant in described gas-liquid separator 2, and secondary heater 4 stops heating.
When refrigerant temperature Tp is less than described low temperature threshold A, represent now coolant liquid level will quickly increase, and detect further liquid level exceed standard signal time, primary heater 3 and secondary heater 4 is the most now needed to heat to improve refrigerant temperature, coolant is made to accelerate vaporization, so that liquid level reduces rapidly.Certainly, in other embodiments, it is also possible to only select primary heater 3 or secondary heater 4 to heat.
When refrigerant temperature Tp is less than described low temperature threshold A, and be not detected by liquid level exceed standard signal time, although representing now liquid level may quickly increase, but have not occurred coolant and pour in the phenomenon of compressor, preferably, the most only need to open primary heater 3 or secondary heater 4, so that coolant is carried out low-power heating, to improve refrigerant temperature, thus reached to keep the effect of coolant liquid level by gasifying section coolant.Relative to selecting secondary heater 4 to heat, in the present embodiment, select primary heater 3 to heat, be owing to primary heater is buried in coolant depths, coolant entirety can be vaporized the most intensely the heating of coolant entirety；And whether coolant liquid level reaches the height of secondary heater and be unaware of, then open secondary heater and there is the possibility of dry combustion method.
Step S206, controller judges whether to detect that described liquid level exceeds standard signal, when detect liquid level exceed standard signal time, then perform step S207；When be not detected by liquid level exceed standard signal time, then perform step S202.
Step S207, controller controls primary heater 3 and stops heating, and the coolant in described gas-liquid separator 2 is heated by secondary heater 4.
When refrigerant temperature Tp is between described low temperature threshold A and high temperature threshold value B, represents now liquid level and be in steady statue.If now detecting, liquid level exceeds standard signal, can control primary heater 3 or secondary heater 4 heats, to improve refrigerant temperature Tp so that coolant vaporization is accelerated and reduced coolant liquid level.Heat relative to selecting primary heater 3, the present embodiment selects to control secondary heater 4 and heats, then can heat the coolant at shallower place, on the one hand to make local coolant fast vaporizing quickly reduce liquid level, and the coolant at remaining position keeps existing vaporization efficency or slightly improves；On the other hand, compared to using primary heater 3 to heat, owing in the present embodiment, the power of secondary heater 4 is relatively big, then the heat that coolant obtains is more, and gasification rate is faster.
As from the foregoing, the control method of the air-conditioner outdoor unit that the present embodiment is provided, owing to the refrigerant temperature Tp temperature of the air vent of compressor is relevant with the refrigerant temperature in gas-liquid separator 2, and by combining refrigerant temperature Tp, high temperature threshold value B, low temperature threshold A, liquid level exceed standard signal and default Rule of judgment, control primary heater 3 and the state of secondary heater 4, there is the effect of the height more comprehensively, efficient and energy-conservationly controlling coolant.
At this it should be noted that in the present embodiment, include illustrating as a example by two heaters by heater, but do not limit and be only capable of including two heaters；In the present embodiment, during the heating of one of above-mentioned primary heater 3 and secondary heater 4, then heater is in low-power mode work；When primary heater 3 and secondary heater 4 combined heat, then heater is in high-power mode work.It is only used as explanation at this, does not limit high-power mode and low-power mode is only limitted to this scheme.
Such as, in other embodiments, it is also possible to only include a heater, three heaters or more heater, the position of these heaters both can be separate, it is also possible to is together.In the embodiment of other devices, it is high-power mode when can be and work more than half heater, is otherwise low-power mode；Or, it is also possible to be heater electric current higher than rated value half time be in high-power mode, be otherwise in low-power mode；Or can also is that both combinations above-mentioned divide high-low power pattern etc..
Refer to the second embodiment that Fig. 5, Fig. 5 show the control method of air-conditioner outdoor unit of the present invention, the present embodiment, on the basis of above-mentioned control method embodiment, carrys out further assist control in conjunction with refrigerant temperature trend, so that control is more reasonable.Specifically:
Step S201, it is judged that Tp >=B, Tp ＜ A or A≤Tp ＜ B, when acquired refrigerant temperature Tp is more than described high temperature threshold value B, performs step S202；When acquired refrigerant temperature Tp is less than described low temperature threshold A, perform step S203；When acquired refrigerant temperature Tp is between described low temperature threshold A and high temperature threshold value B, perform step S206.Wherein, low temperature threshold A can take 0 DEG C～40 DEG C, and high temperature threshold value B can take 45 DEG C～60 DEG C.
Step S202, controller controls primary heater 3 and stops heating, and secondary heater 4 stops heating.
When refrigerant temperature Tp is more than described high temperature threshold value B, representing now coolant liquid level will quickly reduce, then primary heater 3 and secondary heater 4 stop heating, it is common that will not produce coolant liquid level too high and produce the phenomenon that pours in compressor.Certainly, in other embodiments, if detecting, liquid level exceeds standard signal, then or primary heater 3 and/or secondary heater 4 can be kept to heat, so that coolant liquid level reduces more quickly.
Step S203, controller judges whether to detect that described liquid level exceeds standard signal, when detect liquid level exceed standard signal time, then perform step S208；When be not detected by liquid level exceed standard signal time, perform step S205.
Step S208, obtains and judges that whether the current refrigerant temperature Tpn of the exhaust ports of described compressor 1 is more than the refrigerant temperature Tpo before Preset Time；The most then perform step S205；If it is not, then perform step S204.Wherein, so that judgement is the most accurate, can be when Tpn keeps 20s～100s continuously less than Tpo, it is determined that for Tpn less than Tpo, then export result of determination to perform subsequent step S204.
Step S204, controller controls primary heater 3 and secondary heater 4 is combined the coolant heating in described gas-liquid separator 2.
Step S205, controller controls primary heater 3 and heats the coolant in described gas-liquid separator 2, and secondary heater 4 stops heating.
When refrigerant temperature Tp is less than described low temperature threshold A, represent now coolant liquid level will quickly increase, and detect further liquid level exceed standard signal time, combine the most further and judge refrigerant temperature Tpo and the size of refrigerant temperature Tpn, when refrigerant temperature Tpn is more than refrigerant temperature Tpo, then representing refrigerant temperature and go up, the vaporization rate of coolant is being accelerated, the most now can only open one of them of primary heater 3 and secondary heater 4, i.e. heater works at low power modes.And when refrigerant temperature Tpn is less than refrigerant temperature Tpo, then represent refrigerant temperature to reduce, the vaporization rate of coolant is reducing, the most now need to open primary heater 3 and secondary heater 4, i.e. heater works in high-power mode, coolant is made to accelerate vaporization, so that liquid level reduces rapidly.Certainly, in other embodiments, it is also possible to only select primary heater 3 or secondary heater 4 to heat.
When refrigerant temperature Tp is less than described low temperature threshold A, and be not detected by liquid level exceed standard signal time, represent now coolant liquid level the highest, coolant will not be occurred to pour in the phenomenon of compressor, preferably, the most only need to open one of primary heater 3 and secondary heater 4, so that coolant is carried out low-power heating, to improve refrigerant temperature, reach to keep the effect of coolant liquid level.Relative to selecting secondary heater 4 to heat, in the present embodiment, select primary heater 3 to heat, be owing to primary heater is buried in coolant depths, coolant entirety can be made to accelerate vaporization the heating of coolant entirety；And whether coolant liquid level reaches the height of secondary heater and be unaware of, then open secondary heater and there is the possibility of dry combustion method.
Step S206, controller judges whether to detect that described liquid level exceeds standard signal, when detect liquid level exceed standard signal time, then perform step S207；When be not detected by liquid level exceed standard signal time, then perform step S209.
Step S209, obtains and judges that whether the current refrigerant temperature Tpn of the exhaust ports of described compressor 1 is more than the refrigerant temperature Tpo before Preset Time；The most then perform step S202；If it is not, then perform step S205；
Step S207, controller controls primary heater 3 and stops heating, and the coolant in described gas-liquid separator 2 is heated by secondary heater 4.
The control method that the present embodiment is provided, owing to further increasing the judgement of refrigerant temperature trend, such that it is able to the operation of heater is more finely controlled.Wherein, above-mentioned Preset Time is preferably taken as any value between 5 seconds～15 seconds.
Refer to the 3rd embodiment that Fig. 6, Fig. 6 show the control method of air-conditioner outdoor unit of the present invention, the present embodiment is on the basis of any of the above-described control method embodiment, and the operating frequency in conjunction with compressor 1 carrys out further assist control, so that control is more reasonable.Specifically:
Step S300, obtains and judges that whether the operating frequency of compressor 1 is more than or equal to the frequency threshold preset；The most then perform step S100；If it is not, then perform step S301.Wherein, arranging of frequency threshold can be mated according to different air conditioning systems, it is preferable that frequency threshold is set to any value between 20Hz～50Hz.
Step after step S100 and execution step S100 may refer to the above embodiments, does not repeats them here.
Step S301, obtains and judges that whether the refrigerant temperature Tp at the gas outlet of gas-liquid separator 2 is less than the low temperature threshold A preset；The most then perform step S302；If it is not, then perform step S202.
Step S302, controller judges whether to detect that described liquid level exceeds standard signal；The most then perform step S204；If it is not, then perform step S202.Wherein, step S204 and step S202 refer to above-described embodiment, do not repeat them here.
Due to, when the frequency of compressor is less than frequency threshold, the whole air-conditioner of this interval scale is in low-power operating, thus, the speed of refrigerant circulation and entrance gas-liquid separator 2 is relatively low.Therefore, when can only when refrigerant temperature Tp less than low temperature threshold A and detect liquid level exceed standard signal time, heat.In the present embodiment, use primary heater 3 to heat together with secondary heater 4, then can heat coolant more quickly, so that coolant liquid level reduces.Certainly, in other embodiments, it is also possible to only open primary heater 3 or secondary heater 4.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (10)
1. an air-conditioner outdoor unit, described air-conditioner outdoor unit includes compressor and the air inlet with described compressor
The gas-liquid separator that mouth connects；It is characterized in that, described air-conditioner outdoor unit also includes that being located at described gas-liquid divides
Heater in the cavity volume of device, be located at described cavity volume in whether exceed default position with monitoring coolant liquid level
The liquid level alarm put, the exhaust ports being located at described compressor are to detect the temperature sensor of refrigerant temperature
And the controller being connected with described liquid level alarm, temperature sensor, the corresponding port of heater, institute
State controller and combine the information of described liquid level alarm and temperature sensor acquisition to control described heater
Work.
2. air-conditioner outdoor unit as claimed in claim 1, it is characterised in that described liquid level alarm includes
It is located in described cavity volume the ball float for detecting liquid level and produces liquid level and exceed standard the mounting seat of signal,
Triggering mounting seat generation liquid level, when described coolant liquid level being detected higher than predeterminated position, is surpassed by described ball float
Mark signal.
3. air-conditioner outdoor unit as claimed in claim 2, it is characterised in that described heater includes the
One heater and secondary heater, described primary heater is located at the bottom of described gas-liquid separator, described
Secondary heater is located between described predeterminated position and described primary heater.
4. the air-conditioner outdoor unit as described in any one of claims 1 to 3, it is characterised in that described air-conditioning
Off-premises station also includes the variable frequency drives for monitoring described compressor operating frequency, described variable frequency drives
Corresponding port be connected with described controller, described control can be in conjunction with described liquid level alarm, temperature sensing
The information that device and variable frequency drives obtain controls the work of described heater.
5. a control method for air-conditioner outdoor unit, described air-conditioner outdoor unit include compressor and with described pressure
The gas-liquid separator that the air inlet of contracting machine connects；Described air-conditioner outdoor unit also includes being located at described gas-liquid separation
Heater in the cavity volume of device, be located at described cavity volume in whether exceed predeterminated position with monitoring coolant liquid level
Liquid level alarm, be located at the exhaust ports of described compressor with the temperature sensor of detection refrigerant temperature and
Controller, it is characterised in that the control method of described air-conditioner outdoor unit includes step:
Controller obtains refrigerant temperature and the low temperature threshold A preset and the height of the exhaust ports of described compressor
Temperature threshold value B；
Controller according to described refrigerant temperature and low temperature threshold A and the size comparison result of high temperature threshold value B,
And whether detect that described liquid level exceeds standard signal, and controlling heater work, described liquid level exceeds standard letter
Number detected that coolant liquid level sends when exceeding predeterminated position by described liquid level alarm.
6. the control method of air-conditioner outdoor unit as claimed in claim 5, it is characterised in that described control
Whether device is according to described refrigerant temperature and low temperature threshold A and the size comparison result of high temperature threshold value B, and
Detecting that described liquid level exceeds standard signal, the step controlling heater work includes:
When acquired refrigerant temperature is more than described high temperature threshold value B, controller controls heater and stops adding
Heat；
When acquired refrigerant temperature is less than described low temperature threshold A, controller judges whether institute to be detected
State liquid level to exceed standard signal；
When detect described liquid level exceed standard signal time, controller control heater set high power mould
Under formula, the coolant in described gas-liquid separator is heated；
When be not detected by described liquid level exceed standard signal time, controller control heater set low-power
Under pattern, the coolant in described gas-liquid separator is heated；Or
When acquired refrigerant temperature is between described low temperature threshold A and high temperature threshold value B, controller is sentenced
Disconnected whether detect that described liquid level exceeds standard signal；
When detect described liquid level exceed standard signal time, controller control heater the most right
Coolant heating in described gas-liquid separator；
When be not detected by described liquid level exceed standard signal time, controller control heater stop heating.
7. the control method of air-conditioner outdoor unit as claimed in claim 6, it is characterised in that determining
The refrigerant temperature obtained is less than described low temperature threshold A and detects that described liquid level exceeds standard after signal, in institute
State controller and control the step that the coolant in described gas-liquid separator is heated by heater in high-power mode
Before Zhou, the control method of described air-conditioner outdoor unit further comprises the steps of:
Before controller obtains the current refrigerant temperature Tpn of exhaust ports and the Preset Time of described compressor
Refrigerant temperature Tpo, it is judged that whether described Tpn is more than described Tpo；
When described Tpn controls heater at low power modes more than described Tpo, the most described controller
Coolant in described gas-liquid separator is heated；
When described Tpn is less than described Tpo, then perform described controller and control heater at high power mould
The step under formula, the coolant in described gas-liquid separator heated.
8. the control method of air-conditioner outdoor unit as claimed in claim 6, it is characterised in that determining
Obtain refrigerant temperature between described low temperature threshold A and high temperature threshold value B and be not detected by described liquid level surpass
After mark signal, before described controller controls the step of heater stop heating, described air conditioning chamber
The control method of outer machine further comprises the steps of:
Before controller obtains the current refrigerant temperature Tpn of exhaust ports and the Preset Time of described compressor
Refrigerant temperature Tpo, it is judged that whether described Tpn is more than described Tpo；
When described Tpn is less than described Tpo, then controller controls heater at low power modes to institute
State the coolant heating in gas-liquid separator；
When described Tpn is more than described Tpo, then performs described controller and control heater stop heating
Step.
9. the control method of air-conditioner outdoor unit as claimed in claim 6, it is characterised in that described air-conditioning
Off-premises station also includes the variable frequency drives for monitoring described compressor operating frequency, obtains gas at controller
Refrigerant temperature at the gas outlet of liquid/gas separator and preset low temperature threshold A and high temperature threshold value B step it
Before, the control method of described air-conditioner outdoor unit further comprises the steps of:
Controller obtains the operating frequency of compressor and default frequency threshold, it is judged that described operating frequency is
No less than described frequency threshold；
When acquired operating frequency is less than described frequency threshold, controller obtains going out of gas-liquid separator
Refrigerant temperature at QI KOU and the low temperature threshold A preset；
When the refrigerant temperature obtained is higher than described low temperature threshold A, controller controls heater stop and adds
Heat；
When the refrigerant temperature obtained is less than described low temperature threshold A, controller judges whether to detect described
Liquid level exceeds standard signal；
When be not detected by described liquid level exceed standard signal time, controller control heater stop heating；
When detect described liquid level exceed standard signal time, controller control heater to described gas-liquid separator
Interior coolant heating；
When acquired operating frequency is more than described frequency threshold, performs described controller acquisition gas-liquid and divide
Refrigerant temperature away from the gas outlet of device and the low temperature threshold A preset and the step of high temperature threshold value B.
10. the control method of the air-conditioner outdoor unit as described in any one of claim 6 to 9, its feature exists
In, described heater includes that primary heater and secondary heater, described secondary heater are positioned at first
Between heater and described predeterminated position；When described heater works at low power modes, first adds
One of hot device and secondary heater work, and when described heater works in high-power mode, first adds
Hot device and secondary heater associated working.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510240882.3A CN106288027B (en) | 2015-05-12 | 2015-05-12 | The control method of air-conditioner outdoor unit and air-conditioner outdoor unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612162A (en) * | 2018-12-29 | 2019-04-12 | 临安派祺空气净化科技有限公司 | A kind of heat exchange efficiency that improves monitors heat exchanger core |
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| KR20010001356A (en) * | 1999-06-03 | 2001-01-05 | 구자홍 | Refrigeration cycle |
| JP2012077984A (en) * | 2010-09-30 | 2012-04-19 | Daikin Industries Ltd | Refrigerating circuit |
| CN203629167U (en) * | 2013-06-13 | 2014-06-04 | 广东美的暖通设备有限公司 | Gas-liquid separation device and air conditioner |
| CN104266426A (en) * | 2014-10-16 | 2015-01-07 | 珠海格力电器股份有限公司 | Method and system for determining liquid level in vapor-liquid separator |
| CN204154042U (en) * | 2014-10-15 | 2015-02-11 | 安徽美芝精密制造有限公司 | Reservoir |
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| KR20010001356A (en) * | 1999-06-03 | 2001-01-05 | 구자홍 | Refrigeration cycle |
| JP2012077984A (en) * | 2010-09-30 | 2012-04-19 | Daikin Industries Ltd | Refrigerating circuit |
| CN203629167U (en) * | 2013-06-13 | 2014-06-04 | 广东美的暖通设备有限公司 | Gas-liquid separation device and air conditioner |
| CN204154042U (en) * | 2014-10-15 | 2015-02-11 | 安徽美芝精密制造有限公司 | Reservoir |
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| CN109612162A (en) * | 2018-12-29 | 2019-04-12 | 临安派祺空气净化科技有限公司 | A kind of heat exchange efficiency that improves monitors heat exchanger core |
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