CN100487346C - Air conditioner - Google Patents
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- CN100487346C CN100487346C CNB2004100199030A CN200410019903A CN100487346C CN 100487346 C CN100487346 C CN 100487346C CN B2004100199030 A CNB2004100199030 A CN B2004100199030A CN 200410019903 A CN200410019903 A CN 200410019903A CN 100487346 C CN100487346 C CN 100487346C
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Abstract
The present invention discloses an air conditioner, including outdoor machine with several compressors and outdoor heat exchangers and indoor machine connected with outdoor machine and mounted in the interior of room. Besides, it also includes an oil-equalizing pipe, so that it can prolong the service life of compressor.
Description
Technical field
The present invention relates to air-conditioner, especially be provided with the multi-split air conditioner of oil equalizing pipe to being connected in parallel several compressors from fluid reservoir.
Background technology
In general, air-conditioner is to produce cold air by processes such as the compression of refrigerant and condensation, expansion, evaporations, and a cold airflow that produces is gone into indoor, reduces the machine of indoor temperature.Air-conditioner is divided into off-premises station that is arranged on the outside and the indoor set that is arranged on the indoor.Off-premises station is to be made of parts such as compressor 10, fluid reservoir 20, cross valve 11, outdoor heat converter 12, outdoor fans 13.Indoor set is to be made of parts such as expansion valve 14, indoor heat converter 15, indoor fans 16.
The air-conditioner that possesses said structure in order to make several interior space refrigeration or to heat, can be taked an off-premises station to connect one of several indoor sets and drag multi-form.
As shown in Figure 1, the process of refrigerastion of the air-conditioner of prior art is: flow into the gaseous state refrigerant of the low-temp low-pressure the compressor 10 from indoor heat converter 15, pressurization by compressor 10 adds the gaseous state refrigerant that is pressed into HTHP, and by cross valve 11 inflow outdoor heat exchangers 12.The refrigerant of inflow outdoor heat exchanger 12 will be in outdoor heat converter 12 internal flows, and suck in the extraneous air of off-premises station inside with driving by outdoor fan 13 and to carry out heat exchange, are changed to the liquid condition refrigerant of normal temperature high voltage.
Be changed to the liquid condition refrigerant of normal temperature high voltage via said process, when flowing into expansion valve 14, in order easily to realize evaporation, decompression is the liquid condition refrigerant of low-temp low-pressure in the process of expansion valve 14 internal flows, and inflow indoor heat exchanger 15 then.The refrigerant of inflow indoor heat exchanger 15 will carry out heat exchange with indoor heat converter 15 ambient airs, be changed to the gaseous state refrigerant of low-temp low-pressure, flow into compressor 10 again by cross valve 11 at last.
In sum, will carry out heat exchange with indoor heat converter 15 ambient airs by the refrigerant in the indoor heat converter 15 of expansion valve 14 decompressions.Promptly with indoor heat converter 15 in the refrigerant surrounding air of carrying out heat exchange absorbed heat by refrigerant, be changed to the cold air that temperature descends.Cold air flows into indoor by the air-supply effect of indoor fan 16.By above-mentioned several links, air-conditioner is finished the refrigeration of whole indoor environment.
As shown in Figure 2, the process that heats of air-conditioner is opposite with described process of refrigerastion.Flow into the gaseous state refrigerant of the low-temp low-pressure of compressor 10 from outdoor heat converter 12, when will add the gaseous state refrigerant that is pressed into HTHP by the pressurization of compressor 10, by cross valve 11 inflow indoor heat exchangers 15, and after carrying out heat exchange with indoor heat converter 15 ambient airs, the liquid condition refrigerant that is changed to normal temperature high voltage flows into expansion valve 14.At this moment, the surrounding air of carrying out heat exchange with the gaseous state refrigerant of HTHP, because the thermal change of refrigerant becomes hot-air, and the air-supply effect by indoor fan 16 flows into indoorly, and indoor temperature is risen.
In order to make refrigerant carry out evaporation swimmingly in outdoor heat converter 12, the refrigerant that flows into expansion valve 14 will reduce pressure behind the liquid condition refrigerant into low-temp low-pressure, inflow outdoor heat exchanger 12.And, the refrigerant of inflow outdoor heat exchanger 12 will by and flow into the gaseous state refrigerant that heat exchange between the extraneous air of off-premises station inside is changed to low-temp low-pressure, flow into compressor 10 again by cross valve 11 then.
But, in the air-conditioner of conventional art, will be arranged at one or more than one compressor 10 in the off-premises station according to the load capacity of indoor set with above-mentioned formation.In off-premises station, be provided with under the situation of more than one compressor 10, variable refrigerating/heating load according to indoor set, more than one compressor, be that several compressors 10 are when moving simultaneously, the oil that is present in the compressor 10 will together be discharged with the refrigerant that has pressurizeed, and, suck again in compressor 10 separately via fluid reservoir 20 as the gas-liquid separation machine.At this moment, oil together sucks in the process of compressor 10 with refrigerant again, and oil will more flow into 10 li on compressor capacious, and the relatively little compressor 10 of capacity will flow into the oil of relatively small amount, cause the problem of lubricating oil deficiency easily.
In order to prevent the non-equal oil condition between the compressor 10, as shown in Figure 3, between compressor 10 and compressor 10a, be provided with oil equalizing pipe 40 with the connection of series connection form.As shown in Figure 4, by oil equalizing pipe 40, can keep the mutual level of the oil between compressor 10, the 10a.But, if only move under the situation of a compressor 10, as shown in Figure 5, because the suction pressure reduction between operating compressor 10 and the compressor 10a out of service, oil in the compressor 10a out of service will move in the operating compressor 10, cause the serious problems of the mutual inhomogeneous distribution of oil phase that makes between compressor 10, the 10a.
And, if make operating compressor 10 out of service, if when making the compressor 10a recovery driving under the halted state, might cause owing to the shortage of oil in the beginning compressor driven 10a makes frictional force increase the serious problem that compressor 10a itself is sustained damage.
Summary of the invention
Technical problem to be solved by this invention is, provide from fluid reservoir and oil equalizing pipe is set to being connected in parallel several compressors, the oil equalizing pipe of operating compressor side is connected on the refrigerant pipe suction passage of the oblique compressor side out of service of fluid reservoir inclination, make the oil of operating compressor side because its gravity fall arrives fluid reservoir, can prevent toward the flowing of compressor side out of service, and can effectively realize the air-conditioner of the equal oily process between the compressor.
For the technical solution problem, the technical solution used in the present invention is: a kind of air-conditioner comprises the off-premises station that possesses several compressors and outdoor heat converter; Be connected with off-premises station, be arranged at indoor indoor set; It is characterized in that also comprising that the fluid reservoir in the off-premises station is parallel-connected on several compressors, the lubricating oil that makes operating compressor side according to gravity fall in the fluid reservoir time, make lubricating oil flow in the oil equalizing pipe that forms equal oily process between the compressor that makes of operating compressor side again, each oil equalizing pipe one end connects compressor side, the other end is connected on the refrigerant pipe suction passage of next compressor successively, for the lubricating oil that makes operating compressor side according to gravity fall in fluid reservoir, prevent toward being in flowing of compressor side run-stopping status under, the past oblique one-tenth of fluid reservoir inclination of each refrigerant pipe suction passage.
The invention has the beneficial effects as follows: air conditioner of the present invention is provided with oil equalizing pipe from fluid reservoir to being connected in parallel several compressors.Promptly the oil equalizing pipe of operating compressor side is connected on the refrigerant pipe suction passage of the oblique compressor side out of service of fluid reservoir inclination.The oil of operating compressor side since its gravity fall to fluid reservoir, prevented from effectively to have realized the equal oily process between the compressor toward the flowing of compressor side out of service.Effectively prevented shortage of oil in the operating compressor and made frictional force increase the breakage of caused compressor.
Description of drawings
Fig. 1 is the state diagram of the refrigeration system of air-conditioner in the past.
Fig. 2 is the state diagram of the heating of air-conditioner in the past.
Fig. 3 is the state diagram of the oil homogenizing structure of air-conditioner in the past.
Fig. 4 is in the oil homogenizing structure of air-conditioner in the past, under the state that several compressors all move, forms equal oily status of processes figure between the compressor.
Fig. 5 is in the oil homogenizing structure of multi-split air conditioner in the past, has only a compressor under the state of operation, forms non-equal oily status of processes figure between the compressor.
Fig. 6 is the state diagram of the oil homogenizing structure of air-conditioner of the present invention.
Fig. 7 is in the oil homogenizing structure of air-conditioner of the present invention, under the state that several compressors all move, forms equal oily status of processes figure between the compressor.
Fig. 8 is in the oil homogenizing structure of air-conditioner of the present invention, has only a compressor under the state of operation, forms equal oily status of processes figure between the compressor.
Fig. 9 is the enforcement illustration of another oil homogenizing structure of air-conditioner of the present invention.
Figure 10 is in the oil homogenizing structure of Fig. 9, when compressor starts out of service is moved, forms equal oily status of processes figure between the compressor.
Figure 11 is in the another kind of oil homogenizing structure of air-conditioner of the present invention, under the state of three central more than one compressor operatings of compressor, forms equal oily status of processes figure between the compressor.
Figure 12 is in another oil homogenizing structure of air-conditioner of the present invention, under the state of four central more than one compressor operatings of compressor, forms equal oily status of processes figure between the compressor.
Among the figure, 10,10a, 10b, 10c: compressor
11: cross valve
12: outdoor heat converter
13: outdoor fan
14: expansion valve
15: indoor heat converter
16: indoor fan
20: fluid reservoir
30,32,130,132,230,232,234,236: refrigerant pipe suction passage
40,140,142,240,242,244,246: oil equalizing pipe
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
As shown in Figure 6, air-conditioner of the present invention is by the off-premises station (not shown) that possesses several compressors 10,10a and outdoor heat converter (not shown); Be connected with off-premises station, and be arranged at indoor set (not shown) on indoor institute's allocation; Fluid reservoir 20 in off-premises station is parallel-connected on several compressors 10, the 10a, and the lubricating oil that makes operating compressor 10 sides according to gravity fall in the fluid reservoir 20 time, make lubricating oil flow in operating compressor 10 sides again, make 140,142 formations of oil equalizing pipe that form equal oily process between compressor 10, the 10a.
Below, the air-conditioner that is provided with oil equalizing pipe of the present invention is described in detail:
In air-conditioner in the past, the oil equalizing pipe 40 between several compressors 10, the 10a is to interconnect in the mode of being connected in series.Under the mode of being connected in series, when a side compressor 10a was out of service, the oil in the compressor 10a out of service will move in the operating compressor 10.Therefore, cause the non-homogeneous assignment problem of the lubricating oil between compressor 10, the 10a separately.In order to solve the non-homogeneous assignment problem of lubricating oil, in air-conditioner of the present invention, oil equalizing pipe 140,142 is parallel-connected on several compressors 10, the 10a from fluid reservoir 20, and promptly operating compressor 10 side oil equalizing pipes 140 are connected on the refrigerant pipe suction passage 132 of the oblique compressor 10a side out of service of fluid reservoir 20 inclinations.The oil that makes operating compressor 10 sides according to gravity fall in fluid reservoir 20, prevent flowing toward compressor 10a side out of service, the fluid reservoir 20 interior lubricating oil that cause to fall and break simultaneously flow into operating compressor 10 sides again with refrigerant, make and form equal oily process between compressor 10, the 10a.
In the present invention, giving identical symbol with the part that aforesaid conventional art possesses same formation describes.
As shown in Figure 6, air-conditioner of the present invention is by the off-premises station (not shown) that possesses several compressors 10,10a and outdoor heat converter (not shown); Be connected with off-premises station, and be arranged at indoor set (not shown) on indoor institute's allocation; Fluid reservoir 20 in off-premises station is parallel-connected on several compressors 10, the 10a, and the lubricating oil that makes operating compressor 10 sides according to gravity fall in the fluid reservoir 20 time, make lubricating oil flow in operating compressor 10 sides again, make 140,142 formations of oil equalizing pipe that form equal oily process between compressor 10, the 10a.
The oil equalizing pipe 140 of operating compressor 10 sides is connected on the refrigerant pipe suction passage 132 of compressor 10a side out of service.
The oil equalizing pipe 142 of compressor 10a side out of service is connected on the refrigerant pipe suction passage 30 of operating compressor 10 sides.
For the lubricating oil that can make operating compressor 10 sides according to gravity fall in fluid reservoir 20, prevent flowing toward compressor 10a side out of service, be provided with the refrigerant pipe suction passage 132 of operating compressor 10 side oil equalizing pipes 140, the refrigerant pipe suction passage 132 of compressor 10a side promptly out of service is tiltedly decided angle toward fluid reservoir 20 inclinations.
The equal oil condition between the compressor during a part of driven compressor in several compressors when several compressors all drive and just is described in detail as follows:
Fig. 7 is in the oil homogenizing structure of air-conditioner of the present invention, under the state that several compressors all move, forms equal oily status of processes between the compressor.Fig. 8 is in the oil homogenizing structure of air-conditioner of the present invention, has only a compressor under the state of operation, forms equal oily status of processes between the compressor.
For the equal oily process of can be more concrete careful explanation, several compressors are called the 1st compressor and the 2nd compressor by driven compressor.
At first, under the state that the 1st, 2 compressors all drive, illustrate that the equal oil condition process between the compressor is as follows:
As shown in Figure 6, the oil equalizing pipe of the 1st compressor 10 sides (being called the 1st oil equalizing pipe down) 140 is connected on the refrigerant pipe suction passage 132 of the 2nd oblique compressor 10a side of fluid reservoir 20 inclinations.The oil equalizing pipe of the 2nd compressor 10a side (being called the 2nd oil equalizing pipe down) 142 is connected on the refrigerant pipe suction passage 30 of the 1st compressor 10 sides.Under above-mentioned connection status, make the 1st, 2 compressors 10, when 10a all moves, as shown in Figure 7, at first the lubricating oil of the 1st compressor 10 sides will be by being arranged on the 1st oil equalizing pipe 140 of the 1st compressor, toward the refrigerant pipe suction passage 132 that is connected with the 2nd compressor 10a side of the 1st oil equalizing pipe 140, promptly flow toward the oblique refrigerant pipe suction passage 132 of fluid reservoir 20 inclinations.In addition, as mentioned above, the refrigerant that the lubricating oil of the 1st compressor 10 sides that flow toward the refrigerant pipe suction passage 132 of the 2nd compressor 10a side will suck with the driving owing to the 2nd compressor 10a mixes, and mobile along with refrigerant, together flow in the 2nd compressor 10a.
The lubricating oil of the 2nd compressor 10a side will flow toward the 1st compressor 10 side refrigerant pipe suction passages 30 that are connected with the 2nd oil equalizing pipe 142 by being arranged on the 2nd oil equalizing pipe 142 of the 2nd compressor 10a.The refrigerant that the lubricating oil of the 2nd compressor 10a side that flows toward the refrigerant pipe suction passage 30 of the 1st compressor 10 sides will suck with the driving owing to the 1st compressor 10 mixes, and mobile along with refrigerant, together flows in the 1st compressor 10.So, will form equal oil between the 1st in the driving, 2 compressors 10, the 10a.
In order to make the driving of the air-conditioner that is provided with oil equalizing pipe 140,142, in several the 1st, 2 compressors 10,10a, only move the 1st compressor 10 and the 2nd compressor 10a is out of service, the equal oil condition process that forms between the 1st, 2 compressors 10, the 10a is as follows:
The 1st oil equalizing pipe 140 of the 1st compressor 10 sides is connected on the refrigerant pipe suction passage 132 of the 2nd oblique compressor 10a side of fluid reservoir 20 inclinations, and the 2nd oil equalizing pipe 142 of the 2nd compressor 10a side is connected on the refrigerant pipe suction passage 30 of the 1st compressor 10 sides.Under above-mentioned connection status, when only moving the 1st compressor 10, as shown in Figure 8, at first the lubricating oil of the 1st compressor 10 sides will be mobile toward the refrigerant pipe suction passage 132 of the 2nd compressor 10a side that is connected with the 1st oil equalizing pipe 140 by the 1st oil equalizing pipe 140 that is arranged on the 1st compressor, promptly flows toward the oblique refrigerant pipe suction passage 132 of fluid reservoir 20 inclinations.Flowing in the refrigerant pipe suction passage 132 of the 2nd compressor 10a side is the lubricating oil of the 1st compressor 10 sides; The 2nd compressor 10a is in run-stopping status, the 2nd compressor 10a side that does not exist refrigerant to flow into, and promptly 132 the past fluid reservoirs 20 of refrigerant pipe suction passage toward the 2nd oblique compressor 10a side of fluid reservoir 20 inclinations fall.The lubricating oil that drops to the 1st compressor 10 sides in the fluid reservoir 20 will mix with the refrigerant that is inhaled into owing to 10 drivings of the 1st compressor, and suck again in the 1st compressor 10 along with flowing of refrigerant, make operating the 1st compressor 10 and be in the equal oily process of formation between the 2nd compressor 10a run-stopping status under.
Fig. 9 is the enforcement illustration of another oil homogenizing structure of air-conditioner of the present invention.Figure 10 is in the oil homogenizing structure of Fig. 9, when compressor starts out of service is moved, forms equal oily status of processes figure between the compressor.As shown in Figure 9, the oil equalizing pipe 140 of operating compressor 10 sides is connected on the refrigerant pipe suction passage 132 of the oblique compressor 10a side out of service of fluid reservoir 20 inclinations.The oil equalizing pipe 142 of compressor 10a side out of service is connected on the refrigerant pipe suction passage 130 of operating compressor 10 sides.Under above-mentioned connection status, when compressor 10,10a alternate run, for the lubricating oil that makes operating compressor 10a side since gravity fall to fluid reservoir 20, prevent flowing toward compressor 10 sides out of service, be provided with the refrigerant pipe suction passage 130 of operating compressor 10a side oil equalizing pipe 142, the refrigerant pipe suction passage 130 of compressor 10 sides promptly out of service tilts toward fluid reservoir 20 1 angles that side is decided.
And, each refrigerant pipe suction passage 130,132, its incline direction is consistent with each other.
Opposite with Fig. 9, in order to make the driving of the air-conditioner that is provided with oil homogenizing structure, in several the 1st, 2 compressors 10,10a, operating the 1st compressor 10 is out of service, and the 2nd compressor 10a that is under the run-stopping status brings into operation, to being described as follows by the 1st, 2 compressors 10 of alternate run, the equal oil condition between the 10a:
The 1st oil equalizing pipe 140 of the 1st compressor 10 sides is connected on the refrigerant pipe suction passage 132 of the 2nd oblique compressor 10a side of fluid reservoir 20 inclinations, and the 2nd oil equalizing pipe 142 of the 2nd compressor 10a side is connected on the refrigerant pipe suction passage 130 of oblique the 1st compressor 10 sides of fluid reservoir 20 inclinations.Under above-mentioned connection status, when only moving the 2nd compressor 10a, as shown in figure 10, at first the lubricating oil of the 2nd compressor 10a side will be by being arranged on the 2nd oil equalizing pipe 142 of the 2nd compressor 10a, toward the refrigerant pipe suction passage 130 that is connected with the 1st compressor 10 sides of the 2nd oil equalizing pipe 142, promptly flow toward the oblique refrigerant pipe suction passage 130 of fluid reservoir 20 inclinations.In addition, the lubricating oil of the 2nd compressor 10a side that flows toward the refrigerant pipe suction passage 130 of the 1st compressor 10 sides will be toward the refrigerant pipe suction passage 130 of oblique the 1st compressor 10 sides of fluid reservoir 20 inclinations toward fluid reservoirs 20 whereabouts.The lubricating oil that drops to the 2nd compressor 10a side in the fluid reservoir 20 will mix with the refrigerant that is inhaled into owing to the 2nd compressor 10a driving, and suck again in the 2nd compressor 10a along with flowing of refrigerant, make operating the 2nd compressor 10a and be in the equal oily process of formation between the 1st compressor 10 run-stopping status under.
Figure 11 is in the another kind of oil homogenizing structure according to air-conditioner of the present invention, under the state of more than one compressor operatings, forms equal oily status of processes between the compressor in the middle of three compressors.3 compressors abbreviate the 1st, 2,3 compressors 10,10a, 10b as.
The oil equalizing pipe of the 1st compressor 10 sides (being called the 1st oil equalizing pipe down) 240 is connected on the refrigerant pipe suction passage 232 of the 2nd oblique compressor 10a side of fluid reservoir 20 inclinations.The oil equalizing pipe of the 2nd compressor 10a side (being called the 2nd oil equalizing pipe down) 242 is connected on the refrigerant pipe suction passage 234 of the 3rd oblique compressor 10b side of fluid reservoir 20 inclinations.The oil equalizing pipe of the 3rd compressor 10b side (being called the 3rd oil equalizing pipe down) 244 is connected on the refrigerant pipe suction passage 230 of oblique the 1st compressor 10 sides of fluid reservoir 20 inclinations.
Below, the method of operation according to the 1st, 2,3 compressors 10,10a, 10b, promptly all move according to the 1st, 2,3 compressors 10,10a, 10b, perhaps alternately only move one of them compressor, perhaps only move wherein two compressors, the equal oily process that forms between the 1st, 2,3 compressors 10,10a, the 10b be described in detail:
At first, 1st, 2,3 compressors 10, when 10a, 10b all move, shown in Figure 11 a, the lubricating oil of the 1st compressor 10 sides will flow to the refrigerant pipe suction passage 232 of the 2nd compressor 10a side by the 1st oil equalizing pipe 240, simultaneously mix and will flow in the 2nd compressor 10a with sucking in the refrigerant of the refrigerant pipe suction passage 232 of the 2nd compressor 10a side.In addition, the lubricating oil of the 2nd compressor 10a side will flow to the refrigerant pipe suction passage 234 of the 3rd compressor 10b side by the 2nd oil equalizing pipe 242, simultaneously mix and will flow in the 3rd compressor 10b with sucking in the refrigerant of the refrigerant pipe suction passage 234 of the 3rd compressor 10b side.The lubricating oil of the 3rd compressor 10b side will flow to the refrigerant pipe suction passage 230 of the 1st compressor 10 sides by the 3rd oil equalizing pipe 244, simultaneously mix and will flow in the 1st compressor 10 with sucking in the refrigerant of the refrigerant pipe suction passage 230 of the 1st compressor 10 sides.So far, will form equal oily process between the 1st, 2,3 compressors 10,10a, the 10b.
In addition, in the 1st, 2,3 compressors 10,10a, 10b, only move under the state of one of them compressor, as only moving the 1st compressor 10, and the 2nd, 3 compressor 10a10b are under the state out of service, shown in Figure 11 b, the lubricating oil of the 1st compressor 10 sides will flow to the refrigerant pipe suction passage 232 of the 2nd compressor 10a side by the 1st oil equalizing pipe 240.Lubricating oil will not have the refrigerant pipe suction passage 232 of the 2nd mobile compressor 10a side of refrigerant to drop to fluid reservoir 20 by being in run-stopping status, refrigerant pipe suction passage 230 by operating the 1st compressor 10 sides sucks in the 1st compressor 10 again simultaneously, makes and forms equal oily process between the 1st compressor 10 and the 2nd, 3 compressor 10a, the 10b.In addition, only move under the situation of the 2nd compressor 10a or the 3rd compressor 10b,, make an operating compressor and be in to form equal oily process between two compressors under the run-stopping status still by process same as described above.
In the 1st, 2,3 compressors 10,10a, 10b, only operation is wherein under the state of two compressors, as only moving the 1st, 2 compressors 10,10a, and the 3rd compressor 10b is under the state out of service, shown in Figure 11 c, the lubricating oil of the 1st compressor 10 sides will flow to the refrigerant pipe suction passage 232 of the 2nd compressor 10a side by the 1st oil equalizing pipe 240, mix with the refrigerant that sucks in the refrigerant pipe suction passage 232 of the 2nd compressor 10a side simultaneously, flow in the 2nd compressor 10a again.In addition, the lubricating oil of the 2nd compressor 10a side will flow to the refrigerant pipe suction passage 234 of the 3rd compressor 10b side by the 2nd oil equalizing pipe 242, and there is not the refrigerant pipe suction passage 234 of the 3rd mobile compressor 10b side of refrigerant to drop to fluid reservoir 20 by being in run-stopping status, each refrigerant pipe suction passage 230,232 by operating the 1st compressor 10 and the 2nd compressor 10a side sucks in the 1st compressor 10 and the 2nd compressor 10a again simultaneously, makes and forms equal oily process between the 1st, 2 compressors 10,10a and the 3rd compressor 10b.In addition, only move under the situation of the 2nd, 3 compressor 10a, 10b or the 1st, 3 compressors 10,10b, remain process same as described above, promptly suck again in the process of the 2nd, 3 compressor 10a, 10b or the 1st, 3 compressors 10,10b, make operating two compressors and be in to form equal oily process between the compressor under the run-stopping status by lubricating oil.
Figure 12 is another oil homogenizing structure of air-conditioner of the present invention, under the state of four central more than one compressor operatings of compressor, forms equal oily status of processes between the compressor.For the convenience that illustrates, 4 compressors abbreviate the 1st, 2,3,4 compressors 10,10a, 10b, 10c as.
With oil homogenizing structure under the state that is provided with 3 compressors 10,10a, 10b shown in Figure 11 a to 11c much at one.The oil equalizing pipe of the 4th compressor 10c side (being called the 4th oil equalizing pipe down) 246 is connected on the refrigerant pipe suction passage 230 of oblique the 1st compressor 10 sides of fluid reservoir 20 inclinations.And, the refrigerant pipe suction passage 232 of the 1st oil equalizing pipe 240 and the 2nd compressor 10a side, the refrigerant pipe suction passage 234 of the 2nd oil equalizing pipe 242 and the 3rd compressor 10b side, the refrigerant pipe suction passage 236 of the 3rd oil equalizing pipe 244 and the 4th compressor 10c side, the refrigerant pipe suction passage 230 of the 4th oil equalizing pipe 246 and described the 1st compressor 10 sides is connected to form separately.
Below, the method of operation according to the 1st, 2,3,4 compressors 10,10a, 10b, 10c, promptly all move according to the 1st, 2,3,4 compressors 10,10a, 10b, 10c, perhaps alternately only move one of them compressor, perhaps only move wherein three compressors, and the equal oily process that forms between aforesaid the 1st, 2,3 compressors 10,10a, the 10b, its principle is much at one.Therefore, to the equal oily process that forms between the 1st, 2,3,4 compressors 10,10a, 10b, the 10c, no longer give unnecessary details.Only only moving the equal oily process that forms between the 1st, 2,3,4 compressors 10 under the state of two compressors, 10a, 10b, the 10c in the method for operation to the 1st, 2,3,4 compressors 10,10a, 10b, 10c here, is described in detail:
1st, only move under the state of two compressors in the method for operation of 2,3,4 compressors 10,10a, 10b, 10c, as only moving the 1st, 2 compressors 10,10a, and the 3rd, 4 compressor 10b, 10c are under the state out of service, shown in Figure 12 a, the lubricating oil of the 1st compressor 10 sides will flow to the refrigerant pipe suction passage 232 of the 2nd compressor 10a side by the 1st oil equalizing pipe 240, mix simultaneously, flow in the 2nd compressor 10a with the refrigerant that sucks in the refrigerant pipe suction passage 232 of the 2nd compressor 10a side.In addition, the lubricating oil of the 2nd compressor 10a side will flow to the refrigerant pipe suction passage 234 of the 3rd compressor 10b side by the 2nd oil equalizing pipe 242, and when dropping to fluid reservoir 20 by the refrigerant pipe suction passage 234 that is in run-stopping status and does not have the 3rd compressor 10b side that refrigerant flows, each refrigerant pipe suction passage 230,232 by operating the 1st compressor 10 and the 2nd compressor 10a side sucks in the 1st compressor 10 and the 2nd compressor 10a again, forms equal oily process between the 1st, 2 compressors 10,10a and the 3rd, 4 compressor 10b, the 10c thereby make.In addition, only move under the situation of the 3rd, 4 compressor 10b, 10c, remain process same as described above, promptly suck again in the process of the 3rd, 4 compressor 10b, 10c, make operating two compressors and be in to form equal oily process between two compressors under the run-stopping status by lubricating oil.
If only move the 1st, 3 compressors 10,10b, and the 2nd, 4 compressor 10a, 10c is under the state out of service, shown in Figure 12 b, the 1st, 3 compressors 10, the lubricating oil of 10b side will be by the 1st, 3 oil equalizing pipes 240,244 flow to the 2nd, 4 compressor 10a, the refrigerant pipe suction passage 232 of 10c side, 236, and by be in that run-stopping status do not have that refrigerant flows the 2nd, 4 compressor 10a, the refrigerant pipe suction passage 232 of 10c side, 236 when dropping to fluid reservoir 20, drop to the 1st of fluid reservoir 20,3 compressors 10, the lubricating oil of 10b side is by each refrigerant pipe suction passage 230 of operating the 1st compressor 10 and the 3rd compressor 10b side, 234 suck in the 1st compressor 10 and the 3rd compressor 10b again, make the 1st, 3 compressors 10,10b and the 2nd, 4 compressor 10a, form equal oily process between the 10c.In addition, only move under the situation of the 2nd, 4 compressor 10a, 10c, remain process same as described above, promptly suck again in the process of the 2nd, 4 compressor 10a, 10c, make operating two compressors and be in to form equal oily process between two compressors under the run-stopping status by lubricating oil.
More going deep into a step says, be provided with under the situation of n compressor 10, the oil equalizing pipe 240 that is provided with for the equal oily process between the compressor 10, still with Figure 11 in the state that three compressors 10,10a, 10b are set and the oil equalizing pipe 240,242,244,246 the during state of four compressors 10,10a, 10b, 10c of being provided with among Figure 12 that structure is set is identical.Especially the equal oily process between the compressor 10 that forms according to the method for operation of n compressor 10, equal oily process between the compressor 10 that forms with the aforesaid operation of passing through 3 and 4 compressors 10,10a, 10b, 10c, 10a, 10b, the 10c is identical, makes and forms equal oily process between n the compressor 10.
Possessing in sum, the oil homogenizing structure and the concrete quantity of compressor of the air-conditioner of structure have nothing to do, not that compressor moves all, but when one of them or more than one compressor operating, can make the lubricating oil of operating compressor side not flow to compressor side under the run-stopping status, make the invention that forms equal oily process between the compressor.Here, need to prove, under the situation of the oil homogenizing structure of air-conditioner of the present invention, be not only general air-conditioner, the multi-split air conditioner that an off-premises station that can freeze or heat several interior spaces is connected with several indoor sets also is suitable for.
Claims (1)
1, a kind of air-conditioner comprises the off-premises station that possesses several compressors and outdoor heat converter; Be connected with off-premises station, be arranged at indoor indoor set; It is characterized in that also comprising that the fluid reservoir in the off-premises station is parallel-connected on several compressors, the lubricating oil that makes operating compressor side according to gravity fall in the fluid reservoir time, make lubricating oil flow in the oil equalizing pipe that forms equal oily process between the compressor that makes of operating compressor side again, each oil equalizing pipe one end connects compressor side, the other end is connected on the refrigerant pipe suction passage of next compressor successively, for the lubricating oil that makes operating compressor side according to gravity fall in fluid reservoir, prevent toward being in flowing of compressor side run-stopping status under, the past oblique one-tenth of fluid reservoir inclination of each refrigerant pipe suction passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100199030A CN100487346C (en) | 2004-07-08 | 2004-07-08 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100199030A CN100487346C (en) | 2004-07-08 | 2004-07-08 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1719162A CN1719162A (en) | 2006-01-11 |
| CN100487346C true CN100487346C (en) | 2009-05-13 |
Family
ID=35931061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100199030A Expired - Fee Related CN100487346C (en) | 2004-07-08 | 2004-07-08 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100487346C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858621A (en) * | 2010-05-26 | 2010-10-13 | 广东欧科空调制冷有限公司 | Multi-connection air conditioning unit and working method thereof |
| CN103573638B (en) * | 2012-08-02 | 2016-03-23 | 珠海格力电器股份有限公司 | Medium-pressure oil storage device and compressor system with same |
| CN103673397B (en) * | 2012-09-04 | 2016-04-20 | 约克广州空调冷冻设备有限公司 | Parallel-connection compressor oil way system and refrigeration unit |
| JP2014196874A (en) * | 2013-03-29 | 2014-10-16 | 三菱電機株式会社 | Refrigeration cycle device and air conditioner including the same |
-
2004
- 2004-07-08 CN CNB2004100199030A patent/CN100487346C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1719162A (en) | 2006-01-11 |
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Granted publication date: 20090513 Termination date: 20120708 |