CN101086254A - Compressor protection method of air conditioner and the device - Google Patents
Compressor protection method of air conditioner and the device Download PDFInfo
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- CN101086254A CN101086254A CN 200610014106 CN200610014106A CN101086254A CN 101086254 A CN101086254 A CN 101086254A CN 200610014106 CN200610014106 CN 200610014106 CN 200610014106 A CN200610014106 A CN 200610014106A CN 101086254 A CN101086254 A CN 101086254A
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- compressor
- frequency
- changeable
- changeable compressor
- lubricant oil
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Abstract
The invention discloses a protect method of air-conditioner compressor and its installations, in the process of the inverter compressor driven by low frequency, when launching fixed speed compressor, if the lubricants in the inverter compressor dropped to below the critical surface, the inverter compressor shut down, and drive fixed speed compressor by fixed speed. The invention of the air-conditioner compressor protection method and device, perceive lack of lubricants in the inverter compressor through the float control switch, connect / disconnect inverter compressor, it can prevent the inverter compressor oil shortage phenomenon.
Description
Technical field
The present invention relates to a kind of compressor protection method and device thereof of air conditioner, especially utilize the pasta of float switch perception compressor inside, afterwards on/off frequency-changeable compressor and protect the compressor protection method and the device thereof of the air conditioner of compressor.
Background technique
Shown in Fig. 7,8, for the outdoor unit of prior art multi-split air conditioner, a plurality of outdoor units link to each other with a plurality of indoor sets by the refrigerant comb, and outdoor unit drives more than one at least for the load that satisfies indoor set.
Outdoor unit comprises: only export the liquid container 1 of supplying with the gas coolant the refrigerant from indoor set; Reception and compression are from the compressor 2,3 of liquid container 1 gas supplied refrigerant; Link to each other with compressor 2,3, and selection is compressed the four-way valve 4 of the stream of refrigerant; And the outdoor heat converter 5 that makes the refrigerant supplied with from four-way valve 4 and outdoor air carry out heat exchange.
In the refrigerant compression whole volume of outdoor unit, frequency-changeable compressor 2 is born 70% of integral body, and constant speed compressor 3 bears remaining 30%.
But, the outdoor unit of prior art multi-split air conditioner is when frequency-changeable compressor 2 drives with low frequency, if constant speed compressor 3 drives, then the oil of frequency-changeable compressor 2 inside can move to constant speed compressor 3, and suitable oil mass is not guaranteed in the inside of frequency-changeable compressor 2 thus.And, when turning round with high frequency under the state of frequency-changeable compressor 2 at oil starvation, because low on fuel frequency-changeable compressor 2 can be badly damaged.
Summary of the invention
Technical problem to be solved by this invention is, a kind of pasta of the lubricant oil according to the perception of float switch institute is provided, and the on/off frequency-changeable compressor prevents the compressor protection method and the device thereof of the air conditioner that frequency-changeable compressor is impaired.
In order to solve the problems of the technologies described above; the technical solution used in the present invention is: a kind of compressor protection method of air conditioner; in the process that frequency-changeable compressor drives with low operating frequency; when starting constant speed compressor; if the lubricant oil of frequency-changeable compressor inside drops to below the critical pasta; then close frequency-changeable compressor, and constant speed drives constant speed compressor.
After closing frequency-changeable compressor,, drive frequency-changeable compressor again when the pasta of lubricant oil rises to critical pasta when above.
The perception of the critical pasta of lubricant oil by the unsteady sensor that is arranged at frequency-changeable compressor inside.
Described frequency-changeable compressor also comprise can the perception lubricating oil temperature temperature transducer, when the lubricating oil temperature of temperature transducer institute perception exceeds certain limit, close the driving of frequency-changeable compressor.
A kind of compressor protection device of air conditioner comprises: can compress and discharge refrigerant, and keep the compressor of lubricant oil in interior reservoir; And be arranged at the inside of compressor and the pasta of perception lubricant oil, and link to each other with the power supply of frequency-changeable compressor, the float switch of the power supply of frequency-changeable compressor connected/close according to the pasta of lubricant oil.
Described compressor also comprise can the perception lubricating oil temperature temperature transducer.
The invention has the beneficial effects as follows: the compressor protection method of air conditioner of the present invention and device thereof; therefore the on/off frequency-changeable compressor by the lubricant oil deficiency of float switch (float switch) perception frequency-changeable compressor inside can prevent the shortage of oil phenomenon of frequency-changeable compressor.When frequency-changeable compressor drives with low operating frequency,, then stop to drive the frequency-changeable compressor that is driven with low frequency and the lubricant oil that can guarantee appropriate amount if drive constant speed compressor.Therefore can prevent that the deficiency of lubricant oil from bringing the damage of compressor, improve the confidence level of compressor.In addition, directly connect the float switch of power of compressor and perception lubricant oil pasta, when lubricant oil is not enough, does not need independent control procedure and can stop the driving of compressor immediately.And the present invention is according to the lubricating oil temperature connection/close compressor of compressor inside, and the variation that can reduce lubricating oil temperature brings the damage of compressor.
Description of drawings
Fig. 1 is the general stereogram of multi-split air conditioner of the present invention.
Fig. 2 is the multi-split air conditioner pie graph of first embodiment of the invention.
Fig. 3 is the float switch sectional view of first embodiment of the invention.
Fig. 4 is the block diagram of the control device of first embodiment of the invention.
Fig. 5 is the flow chart of the compressor protection method of air conditioner of the present invention.
Fig. 6 is the block diagram of the control device of second embodiment of the invention.
Fig. 7 is the pie graph of prior art multi-split air conditioner outdoor unit.
Fig. 8 is the general pie graph of the compressor oil non-uniform phenomenon of prior art multi-split air conditioner.
Among the figure:
11,12,13,14: indoor set 21,22: outdoor unit
51: indoor heat exchange 54: indoor electromagnetic expanding valve
61: liquid container 62: frequency-changeable compressor
63: constant speed compressor 64: oil separator
65: four-way valve 67: oil equalizing pipe
70: outdoor heat exchange 74: outdoor electromagnetic expanding valve
80: apparatus for supercooling 90: liquid injection apparatus
100: float switch (float switch) 101: buoy (float)
Magnetic 103 in 102: the first: frame (housing)
Magnetic 105 in 104: the second: bar (bar)
106: switch block 107: bump
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
As Fig. 1, shown in Figure 2, multi-split air conditioner of the present invention is by being arranged at the indoor a plurality of indoor sets 11 of building, 12,13,14 and with indoor set 11,12,13,14 outdoor units 21 that link to each other, 22 constitute, indoor set 11,12,13,14 and outdoor unit 21,22 by refrigerant comb 30,40 link to each other, outdoor unit 21,22 according to indoor set 11,12,13, the request of at least one in 14 and driving, indoor set 11,12,13,14 desired refrigeration/thermal capacity increase more, outdoor unit 21,22 driving quantity and be arranged at outdoor unit 21, the driving quantity of 22 compressor also increases.
As shown in Figure 2, outdoor unit 21,22 comprises: only export the liquid container 61 of supplying with the gas coolant the refrigerant from indoor set; Reception and compression are from the compressor 62,63 of liquid container 61 gas supplied refrigerants; Link to each other with compressor 62,63, and selection is compressed the four-way valve 65 of the stream of refrigerant; And the outdoor heat converter 70 that makes the refrigerant supplied with from four-way valve 65 and outdoor air carry out heat exchange.
Frequency-changeable compressor 62 bear first outdoor unit 21 compression volume 70%, it is remaining 30% that the constant speed compressor 63 that is arranged at first outdoor unit 21 is born, the constant speed compressor of outdoor unit 22 is born 50% compression volume respectively in addition.
The inside of frequency-changeable compressor 62 is provided with the temperature transducer 109 of internal lubrication oil temperature that can perception frequency-changeable compressor 62 and float switch 100 that can perception lubricant oil pasta.
The inner lower of compressor 62,63 is provided with mechanical part and up promotes the pump (not shown) that amasss in the lubricant oil of bottom, prevents that the mechanical part of compressor 62,63 inside is impaired because of friction.
As shown in Figure 3, the float switch of an embodiment of the present invention comprises: be arranged at the inside of frequency-changeable compressor 62, by the mobile along the vertical direction buoy 101 of the buoyancy of lubricant oil; According to the height of buoy 101 and the first mobile magnetic 102; Be arranged at the frame 103 of frequency-changeable compressor 62 inwalls; Be arranged on the inside of frame 103, with interactional second magnetic 104 of first magnetic; And contact, and produce the switch block 106 of signal with this by second magnetic mobile with the interaction of first magnetic 102.
The buoy 101 and first magnetic 102 are fixedly installed on the two ends of bar 105 respectively, and bar 105 is connected from frame 103 by pin and protrudes the bump 107 that forms.And frame 103 is by not constituting with the material that the magnetic of first and second magnetic 102,104 acts on mutually.
If buoy 102 is owing to the rising of lubricant oil pasta rises to more than the certain altitude, then according to the interaction of centre across first and second magnetic 102,104 of frame 103, contact with switch block 106, if lubricant oil drop to certain altitude below, then be separated with switch block 106.
In addition, the comb that each compressor 62,63 is connected with four-way valve 65 is provided with oil separator 64, and oil separator 64 is connected the suction side of compressor 62,63.The discharge side of oil separator 64 is provided with one-way valve, and the refrigerant adverse current that prevents from thus to be discharged from is to compressor 62,63 sides.
Oil in the refrigerant that oil separator 64 separate compressors 62,63 are discharged, separated oil supplies to compressor 62,63, guarantees the inside of a certain amount of oil at compressor 62,63.And oil separator 64 links to each other by capillary tube 66 with the suction side comb of compressor 62,63, and lubricant oil flows by capillary tube 66.
Junction chamber outer heat-exchanger 70 makes the refrigerant comb 30 that refrigerant flows be provided with indoor heat converter 51, the electromagnetic expanding valve 74 that refrigerant is expanded, when when refrigeration cool stream to the apparatus for supercooling 80 of the refrigerant of indoor heat converter 51, and the liquid injection apparatus 90 that can reduce the temperature of compressor 62,63.
When refrigeration, outdoor electromagnetic expanding valve 74 is by complete opening, therefore condensation can not be inflated and flows through in the refrigerant of outdoor heat converter, but when heating, outdoor electromagnetic expanding valve 74 makes condensation be expanded to vaporific liquid before the refrigerant of indoor heat converter 51 is flowing into outdoor heat converter 70 with a certain size unlatching.
In addition, the dryer 110 of the inner moisture that refrigerant comb 30 " is provided with and can removes refrigerant comb 30 ", the refrigerant of the dryer 110 of flowing through is at refrigerant comb 30 " goes up shunting and flow to indoor heat converter 51 sides.
Though float switch of the present invention only is arranged on frequency-changeable compressor, it is also harmless that it is set to constant speed compressor.
Below, with reference to Fig. 4 or Fig. 5 the control procedure of the compressor of first embodiment of the invention is elaborated:
At first,, after control device 120 is judged the required load of indoor set, drive outdoor unit 21,22,, also only drive in the indoor set 21,22 sometimes according to load if indoor set hangs with load.
If the size of the required load of indoor set increases, then control device 120 appends on the basis of driving frequency-changeable compressor 62 and drives constant speed compressor 63, should bear the load that is increased thus mutually.
If drive frequency-changeable compressor 62 and constant speed compressor 63 simultaneously, the lubricant oil pasta that frequency-changeable compressor 62 inside then according to circumstances can take place drops to the following phenomenon of reference value height.This be because, constant speed compressor 63 is compared frequency-changeable compressor 62, its compression volume is little, and with the speed compression refrigerant of determining, therefore the phenomenon of lubricant oil deficiency can not take place, but the frequency-changeable compressor 62 not only compression volume of its refrigerant is big, and for the load that satisfies indoor set from the low operating frequency paramount operating frequency that rises rapidly, therefore tend to take place the phenomenon of lubricant oil deficiency.
When driving frequency-changeable compressor 62 simultaneously with constant speed compressor 63, can reduce at the operating frequency of constant speed compressor 63 driven while frequency-changeable compressors 62, rise to certain frequency afterwards once more.
If under the low state of the operating frequency of frequency-changeable compressor 62, drive constant speed compressor 63, then owing to pressure difference, the oil of frequency-changeable compressor 62 is tending towards moving to constant speed compressor 63 sides.Keep certain altitude when above when the lubricant oil pasta of frequency-changeable compressor 62, switch block 106 keeps in touch state, the signal that is transmitted by control device 120 receiving key assemblies 106 and drive frequency-changeable compressor 62.
On the contrary, when the lubricant oil pasta of frequency-changeable compressor 62 drops to certain altitude when following, the contact of switch block 106 can separate, and perceives the lubricant oil pasta by control device 120 and drops to below the certain altitude, and then cut off the power supply of frequency-changeable compressor 62 and stop the driving of frequency-changeable compressor 62.
At this moment, constant speed compressor 63 continues to keep normal driving.And frequency-changeable compressor 62 drives with low operating frequency, constant speed compressor 63 start or the process that drives in, if the driving of frequency-changeable compressor 62 is stopped, the lubricant oil that then is adhered to frequency-changeable compressor 62 inwalls will be toward dirty and bottom being accumulated to.And, if the driving of frequency-changeable compressor 62 is stopped, then because pressure difference, the refrigerant that contains lubricant oil flow into the suction side of frequency-changeable compressor 62, flow into the inside of frequency-changeable compressor 62 by capillary tube 66 and pasta can rise again from oil separator 64 separated lubricant oil.
Afterwards, if the pasta of frequency-changeable compressor 62 inside rises to more than the certain altitude again, then float switch 100 is carried signal to control device 120, and control device 120 is connected the power supply of frequency-changeable compressor 62, thus frequency-changeable compressor 62 is driven again.And after frequency-changeable compressor 62 drove once more, if its operating frequency rises, then the lubricant oil with the constant speed compressor 63 that at the uniform velocity drives flow into frequency-changeable compressor 62 by oil equalizing pipe 67, makes frequency-changeable compressor 62 guarantee the lubricant oil of appropriate amount thus.
In addition, be arranged at the temperature of compressor 62,63 temperature inside sensor senses lubricant oil and be delivered to control device 120, control device 120 is according to the temperature connection/ close compressor 62,63 of perceived lubricant oil.That is, control device 120 stores according to the oil body of temperature and solubility, when oil body and solubility do not reach reference value as yet or surpasses reference value, stops compressor 62,63 in order to protect compressor 62,63.
When oil body during less than certain limit, can take place since lubricant oil causes function such as lubricated, airtight lowly, when viscosity during, can increase friction greater than certain limit; Control device 120 improves the confidence level of compressor according to the temperature value connection/ close compressor 62,63 of lubricant oil.
The second embodiment of the present invention, as Fig. 3 or shown in Figure 6, in a second embodiment except the directly connection of control frequency-changeable compressors 62 of float switch 100/closing, other identical with first embodiment.The power supply of frequency-changeable compressor 62 connects by float switch 100, and the switch block 106 of float switch 62 separates if the pasta of lubricant oil descends, and the power supply that then puts on frequency-changeable compressor 62 will be cut off.And if pasta rises and switch block 106 contacts, then frequency-changeable compressor 62 is switched on power supply again and begins to drive.
When compressor constituted with as above structure, control device 120 to the connection of frequency-changeable compressor 62/close and control, therefore not need not to connect control device 120 and float switch 100, and the wiring of outdoor unit is become simply.
Because second embodiment's other formations and working procedure are identical with first embodiment, omit its detailed description.
The multi-split air conditioner that the guard method of compressor of the present invention not only can be applied to, but also can be applied on other all air conditioners that frequency-changeable compressor and constant speed compressor are installed.
Claims (6)
1, a kind of compressor protection method of air conditioner is characterized in that, in the process that frequency-changeable compressor drives with low operating frequency; when starting constant speed compressor; if the lubricant oil of frequency-changeable compressor inside drops to below the critical pasta, then close frequency-changeable compressor, and constant speed drives constant speed compressor.
2, the compressor protection method of air conditioner according to claim 1 is characterized in that, close frequency-changeable compressor after, when the pasta of lubricant oil rises to critical pasta when above, drive frequency-changeable compressor again.
3, the compressor protection method of air conditioner according to claim 1 is characterized in that, the perception by the unsteady sensor that is arranged at frequency-changeable compressor inside of the critical pasta of lubricant oil.
4, according to the compressor protection method of claim 1,2 or 3 described air conditioners; it is characterized in that; described frequency-changeable compressor also comprise can the perception lubricating oil temperature temperature transducer; when the lubricating oil temperature of temperature transducer institute perception exceeds certain limit, close the driving of frequency-changeable compressor.
5, a kind of compressor protection device of air conditioner is characterized in that, comprising: can compress and discharge refrigerant, and keep the compressor of lubricant oil in interior reservoir; And be arranged at the inside of compressor and the pasta of perception lubricant oil, and link to each other with the power supply of frequency-changeable compressor, the float switch of the power supply of frequency-changeable compressor connected/close according to the pasta of lubricant oil.
6, the compressor protection device of air conditioner according to claim 5 is characterized in that, described compressor also comprise can the perception lubricating oil temperature temperature transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100141062A CN101086254B (en) | 2006-06-06 | 2006-06-06 | Compressor protection method of air conditioner and the device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100141062A CN101086254B (en) | 2006-06-06 | 2006-06-06 | Compressor protection method of air conditioner and the device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101086254A true CN101086254A (en) | 2007-12-12 |
| CN101086254B CN101086254B (en) | 2010-08-25 |
Family
ID=38937367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100141062A Expired - Fee Related CN101086254B (en) | 2006-06-06 | 2006-06-06 | Compressor protection method of air conditioner and the device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101086254B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020853A (en) * | 2015-07-20 | 2015-11-04 | 广东美的暖通设备有限公司 | Heating start control method and system for variable-frequency air conditioner and air conditioner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5327997A (en) * | 1993-01-22 | 1994-07-12 | Temprite, Inc. | Lubrication management system |
| CN1566861A (en) * | 2003-06-25 | 2005-01-19 | 广东美的集团股份有限公司 | Air conditioner compressor with multiple pump arrangement |
| CN2688897Y (en) * | 2004-02-26 | 2005-03-30 | 计高凌 | Oil-shortage preventer of air compressor |
-
2006
- 2006-06-06 CN CN2006100141062A patent/CN101086254B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020853A (en) * | 2015-07-20 | 2015-11-04 | 广东美的暖通设备有限公司 | Heating start control method and system for variable-frequency air conditioner and air conditioner |
| CN105020853B (en) * | 2015-07-20 | 2017-08-01 | 广东美的暖通设备有限公司 | Convertible frequency air-conditioner hot-start control method, control system and its air conditioner |
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| Publication number | Publication date |
|---|---|
| CN101086254B (en) | 2010-08-25 |
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Granted publication date: 20100825 Termination date: 20200606 |
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