CN104165478B - multiple on-line system - Google Patents
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- CN104165478B CN104165478B CN201410378179.4A CN201410378179A CN104165478B CN 104165478 B CN104165478 B CN 104165478B CN 201410378179 A CN201410378179 A CN 201410378179A CN 104165478 B CN104165478 B CN 104165478B
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Abstract
The invention discloses a kind of multiple on-line system, including: multiple compressor assemblies, the second gs-oil separator and controller.Each compressor assembly includes a compressor and first gs-oil separator, and compressor includes first row QI KOU, gas returning port and second exhaust port.Second oil gas entrance of the second gs-oil separator is connected with the first gas outlet of the second exhaust port of each compressor and each first gs-oil separator, and the second oil export is connected with the gas returning port of each compressor by second section fluid element.Multiple on-line system according to embodiments of the present invention, the oil level of the refrigerator oil of operating compressor can be adjusted, avoid compressor that rich oil or petrol starvation occur, refrigerator oil can be reduced and enter in indoor heat exchanger and outdoor heat exchanger, improve multiple on-line system efficiency, it is ensured that the operational reliability of multiple on-line system and service life.
Description
Technical field
The present invention relates to refrigeration system, especially relate to a kind of multiple on-line system.
Background technology
The reliability of multi-gang air-conditioner unit and life-span depend on reliability and the life-span of each compressor, and therefore in each compressor, refrigerator oil balance is the key technology of multi-gang air-conditioner unit design and manufacture.In multi-gang air-conditioner unit, because system loading change needs pondage, therefore multiple compressors there will be run simultaneously, part is run, part stops, the output of frequency conversion (transfiguration) compressor capabilities or the situation such as ability output, each compressor operating load there are differences, very easily cause that between each compressor, energy imbalance occurs in refrigerator oil, some compressors occur that refrigerator oil is not enough, lower than normal oil level generation petrol starvation, time serious, make compressor generation inordinate wear fault.Some compressors occur that refrigerator oil is too much, higher than normal oil level, enrichment phenomenon occurs, easily cause compressor generation liquid hit phenomenon when refrigerator oil too much accumulates in compressor, these all can affect compressor operating safety and service life, even causes compressor damage.
Summary of the invention
It is contemplated that one of technical problem solved at least to a certain extent in correlation technique.For this, it is an object of the present invention to propose a kind of multiple on-line system, it is possible to adjust the oil level of the refrigerator oil of operating compressor.
Multiple on-line system according to embodiments of the present invention, including: multiple compressor assemblies, each described compressor assembly includes a compressor and first gs-oil separator, described compressor includes first row QI KOU and gas returning port, and described compressor is additionally provided with for discharging the second exhaust port exceeding the refrigerator oil setting oil level；Described first gs-oil separator is provided with the first gas outlet, the first oil gas entrance and the first oil export, and described first oil gas entrance is connected with described first row QI KOU, and described first oil export is connected with described gas returning port by first throttle element；Second gs-oil separator, described second gs-oil separator includes the second gas outlet, the second oil gas entrance and the second oil export, described second oil gas entrance is connected with the first gas outlet of the described second exhaust port of each described compressor and each described first gs-oil separator, and described second oil export is connected with the gas returning port of each described compressor by second section fluid element；Controller, described controller is connected the running status controlling each described compressor with each described compressor assembly.
Multiple on-line system according to embodiments of the present invention, the oil level of the refrigerator oil of operating compressor can be adjusted, avoid compressor that rich oil or petrol starvation occur, ensure that the operation safety of each compressor and service life, refrigerator oil can be reduced and enter in indoor heat exchanger and outdoor heat exchanger, improve multiple on-line system efficiency, it is ensured that the operational reliability of multiple on-line system and service life.
It addition, multiple on-line system according to the above embodiment of the present invention can also have following additional technical characteristic:
In further embodiment of the present invention, multiple on-line system also includes multiple check valve assembly, being connected to a described check valve assembly between each described compressor assembly and the described second oil gas entrance of described second gs-oil separator, described check valve assembly is one-way conduction on the direction of the described second oil gas entrance from each described compressor assembly to described second gs-oil separator.
In some examples of the present invention, each check valve assembly includes the first check-valves and the second check-valves, it is in series with described first check-valves between described first gas outlet and the described second oil gas entrance of described first gs-oil separator of each described compressor assembly, between described second exhaust port and the described second oil gas entrance of the described compressor of each described compressor assembly, is in series with described second check-valves.
In other examples of the present invention, described check valve assembly includes a check-valves, the described first gas outlet of described first gs-oil separator of each described compressor assembly is connected with one end of described check-valves with the described second exhaust port of described compressor, and the other end of described check-valves is connected with described second oil gas entrance.
According to some currently preferred embodiments of the present invention, multiple on-line system also includes controlling valve, and described control valve and described second section fluid element are connected in parallel.
Further, each described compressor assembly also includes first temperature-detecting device of the delivery temperature t1 of the described first row QI KOU for detecting described compressor and for detecting second temperature-detecting device of the bottom temp t2 of described compressor；Described controller is connected with described first temperature-detecting device, described second temperature-detecting device and described control valve to control opening or closing of described control valve according to the temperature difference between described delivery temperature t1 and described bottom temp t2.
Preferably, described control valve is electromagnetic valve.
In some embodiments of the invention, it is in series with the first filter between described first oil export and the described gas returning port of each described first gs-oil separator.
In some embodiments of the invention, multiple on-line system also includes the second filter, and described second positioned inline is between described second section fluid element and described second oil export.
Alternatively, described first throttle element and described second section fluid element respectively capillary tube.
Alternatively, each described compressor is constant speed compressor, frequency-changeable compressor or positive displacement compressor.
In some examples of the present invention, described first row QI KOU is identical with the diameter of described second exhaust port.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of multiple on-line system according to an embodiment of the invention；
Fig. 2 is the schematic diagram of multiple on-line system in accordance with another embodiment of the present invention；
Fig. 3 is the schematic diagram of the multiple on-line system according to further embodiment of the present invention；
Fig. 4 is the control process flow diagram flow chart in multiple on-line system according to embodiments of the present invention to the running status controlling valve；
Fig. 5 is the schematic diagram of the compressor in multiple on-line system according to embodiments of the present invention.
Accompanying drawing labelling:
Multiple on-line system 100,
Compressor 2, first row QI KOU a, gas returning port b, second exhaust port c, reservoir 20, compression mechanism 21, motor mechanism the 22, first gs-oil separator the 4, first gas outlet e, the first oil gas entrance f, the first oil export g, first throttle element 6,
Second gs-oil separator the 10, second gas outlet h, the second oil gas entrance i, the second oil export m,
Second section fluid element 12, check valve assembly the 8, first check-valves 8a, the second check-valves 8b, control valve the 13, first filter the 5, second filter 11, cross valve 14, outdoor heat exchanger 15, indoor restricting element 18, indoor heat exchanger 19, outdoor restricting element 16, downtake pipe 4a, second exhaust pipe the 7, first stop valve the 17, second stop valve 23, air suction main 1, suction nozzle 1a, exhaust main 9.
Detailed description of the invention
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include one or more these features.In describing the invention, " multiple " are meant that two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or integral；Can be mechanically connected, it is also possible to be electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be connection or the interaction relationship of two elements of two element internals.For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention as the case may be.
Multiple on-line system 100 according to embodiments of the present invention is described in detail below with reference to Fig. 1-Fig. 5, wherein multiple on-line system 100 includes off-premises station and indoor set, it is assembled together by the first stop valve 17 and the second stop valve 23 between off-premises station and indoor set, indoor set is provided with multiple indoor heat exchanger 19, and each indoor heat exchanger 19 is in series with an indoor restricting element 18.
As shown in Fig. 1-Fig. 3, Fig. 5, multiple on-line system 100 according to embodiments of the present invention, including: multiple compressor assemblies, the second gs-oil separator 10 and controller (not shown go out).Wherein, each compressor assembly includes a compressor 2 and first gs-oil separator 4, and compressor 2 includes first row QI KOU a and gas returning port b, and compressor 2 is additionally provided with for discharging the second exhaust port c exceeding the refrigerator oil setting oil level.Alternatively, the diameter of first row QI KOU a and second exhaust port c is identical, with the demand meeting the rotary compressor 2 that operationally pasta pressure is pressure at expulsion.
Specifically, the type of the compressor 2 in multiple compressor assemblies can identical can also differ, and each compressor 2 can be constant speed compressor, frequency-changeable compressor or positive displacement compressor.In the concrete example of the present invention, set the oil level initial oil level as each compressor 2, but it is understood that, set oil level and can also is that what the practical situation according to each compressor 2 specifically set, be not especially limited at this.Needing to illustrate, when compressor 2 is constant speed compressor, frequency-changeable compressor or positive displacement compressor, the operation principle etc. of compressor 2 is prior art, is just not described in detail here.
First gs-oil separator 4 is provided with the first gas outlet e, first oil gas entrance f and the first oil export g, first oil gas entrance f is connected with first row QI KOU a, first oil export g is connected with gas returning port b by first throttle element 6, specifically, first gs-oil separator 4 has Oil-gas Separation effect, it is drained in the first gs-oil separator 4 by the first oil gas entrance f from the gas returning port b of compressor 2 coolant discharged and carries out Oil-gas Separation, the gaseous coolant separated exports e from the first gas and discharges, the refrigerator oil separated is expelled back into corresponding compressor 2 after discharging from the first oil export g and pass through the reducing pressure by regulating flow of first throttle element 6.Wherein by being provided with first throttle element 6, it is ensured that the pressure differential between first row QI KOU a and gas returning port b, to avoid compressor 2 that phenomenon of collaborating occurs, it is ensured that the dependability of compressor 2.Alternatively, first throttle element 6 is capillary tube or electric expansion valve.
Second gs-oil separator 10 includes the second gas outlet h, second oil gas entrance i and the second oil export m, first gas outlet e of the second oil gas entrance i and the second exhaust port c of each compressor 2 and each first gs-oil separator 4 is connected, second oil export m is connected with the gas returning port b of each compressor 2 by second section fluid element 12, specifically, second gs-oil separator 10 has Oil-gas Separation effect, when gas mixture is drained in the second gs-oil separator 10 from the second oil gas entrance i, Oil-gas Separation can be carried out in the second gs-oil separator 10, the gaseous coolant separated exports h from the second gas and discharges, the refrigerator oil separated is discharged from the second oil export m and is expelled back into each compressor 2 after the reducing pressure by regulating flow of second section fluid element 12, thereby through being provided with second section fluid element 12, can ensure that there is pressure differential between the second exhaust port c of each compressor 2 and gas returning port b, avoid each compressor 2 that phenomenon of collaborating occurs, ensure the dependability of compressor 2.Alternatively, second section fluid element 12 is capillary tube or electric expansion valve.
Controller is connected the running status controlling each compressor 2 with each compressor assembly, that is, controller can control being turned on and off of compressor 2, when compressor 2 is variable conpacitance compressor, controller can also control the running status of compressor 2 to change the capacity of compressor 2, when compressor 2 is frequency-changeable compressor, controller can also regulate the rotating speed of the motor of compressor 2.Needing to illustrate, the structure of controller and control principle etc. are prior art, are just not described in detail here.
Need illustrate be, multiple on-line system 100 also includes the elements such as cross valve 14, outdoor heat exchanger 15, indoor heat exchanger 19, and four valve ports of cross valve 14 are connected with the second gas outlet h of the second gs-oil separator 10, the gas returning port b of each compressor 2, outdoor heat exchanger 15 and indoor heat exchanger 19 respectively.
Specifically, in each compressor 2 running, can enter into the first gs-oil separator 4 from the first oil gas entrance f from the first row QI KOU a of each compressor 2 coolant discharged and carry out Oil-gas Separation, the refrigerator oil separated is drained into from the first oil export g after carrying out reducing pressure by regulating flow first throttle element 6 and is expelled back into corresponding compressor 2 from gas returning port b, the gaseous coolant separated exports e from the first gas and is drained into the second gs-oil separator 10, if from first gs-oil separator 4 discharge gaseous coolant also doped with do not separate completely refrigerator oil time, then can carry out second time Oil-gas Separation in the second gs-oil separator 10 doped with the gaseous coolant of refrigerator oil.
This compressor 2 rich oil when the refrigerator oil in certain compressor 2 exceedes setting oil level, then this compressor 2 can be discharged from second exhaust port c beyond the refrigerator oil setting oil level, it is drained into the second gs-oil separator 10 from the second exhaust port c refrigerator oil discharged, it is drained into the refrigerator oil the second gs-oil separator 10 from second exhaust port c and the coolant being drained into the second gs-oil separator 10 from the first gs-oil separator 4 carries out Oil-gas Separation in the second gs-oil separator 10, the gaseous coolant separated exports h from the second gas and is drained into cross valve 14 with the kind of refrigeration cycle after entering or heats circulation, it is drained in each compressor 2 from the second oil export m refrigerator oil gas returning port b from each compressor 2 after the reducing pressure by regulating flow of second section fluid element 12 discharged, such that it is able to be assigned in other compressors 2 by the compressor 2 of rich oil exceedes the refrigerator oil setting oil level, dynamically to regulate the oil level of refrigerator oil in each compressor 2, and then can avoid compressor 2 that rich oil or petrol starvation occur.
Multiple on-line system 100 according to embodiments of the present invention, each compressor 2 is provided with for discharging the second exhaust port c exceeding the refrigerator oil setting oil level, by being provided with the second gs-oil separator 10, second oil gas entrance i and the second exhaust port c of each compressor 2 of the second gs-oil separator 10 and the first gas outlet e of each first gs-oil separator 4 is connected, second oil export m of the second gs-oil separator 10 is connected with the gas returning port b of each compressor 2 by second section fluid element 12, therefore when the refrigerator oil in certain compressor 2 exceedes setting oil level, exceed the refrigerator oil setting oil level and be drained in the second gs-oil separator 10, the refrigerator oil being drained in the second gs-oil separator 10 can be expelled back in the compressor 2 of each operation, such that it is able to adjust the oil level of the refrigerator oil of operating compressor 2, avoid compressor 2 that rich oil or petrol starvation occur, namely avoid some compressor 2 that rich oil occurs but petrol starvation occurs in some compressor 2, ensure that the operation safety of each compressor 2 and service life, again owing to being provided with the first gs-oil separator 4 and the second gs-oil separator 10, refrigerator oil can be reduced and enter in indoor heat exchanger 19 and outdoor heat exchanger 15, improve multiple on-line system 100 efficiency, ensure that the operational reliability of multiple on-line system 100 and service life.
In some embodiments of the invention, multiple on-line system 100 also includes multiple check valve assembly 8, it is connected to a check valve assembly 8, check valve assembly 8 one-way conduction on the direction of the second oil gas entrance i from each compressor assembly to the second gs-oil separator 10 between each compressor assembly and the second oil gas entrance i of the second gs-oil separator 10.In other words, check valve assembly 8 ends on from the second oil gas entrance i to the direction of each compressor assembly, and coolant can only flow to the second oil gas entrance i of the second gs-oil separator 10 from each compressor assembly, and can not flow back in each compressor assembly.
More specifically, each check valve assembly 8 is one-way conduction on the direction from second exhaust port c to the second oil gas entrance i of corresponding compressor 1, and each check valve assembly 8 one-way conduction on the direction from the first gas outlet e to second oil gas entrance i of corresponding first gs-oil separator 4, high pressure coolant cannot be back to compressor 2 from second exhaust port c and also cannot export e from the first gas and be back to the first gs-oil separator 4.Thus when some compressor 2 runs and some compressor 2 is out of service, the gases at high pressure discharged from the compressor 2 run can be avoided to be back in the compressor 2 of stopping, cause and collaborate or the refrigerator oil in compressor 2 out of service is discharged outside compressor 2 because of pressure reduction, thus ensure that the operational reliability of each compressor 2.
Multiple on-line system 100 according to the present invention first specific embodiment is described in detail below with reference to Fig. 1, Fig. 4 and Fig. 5.
As it is shown in figure 1, multiple on-line system 100 according to embodiments of the present invention includes: two compressor assemblies, the second gs-oil separator 10, controller, check valve assembly 8, cross valve 14, outdoor heat exchanger 15, outdoor restricting element 16, indoor heat exchanger 19, indoor restricting element the 18, first stop valve 17 and the second stop valve 23.
Each compressor assembly includes a compressor 2 and first gs-oil separator 4, each compressor 2 is provided with first row QI KOU a, second exhaust port c and gas returning port b, each compressor 2 includes reservoir 20, gas returning port b is located on reservoir 20, second exhaust port c exceedes, for discharging, the refrigerator oil setting oil level in each compressor 2, but it is understood that, the high-pressure gaseous coolant being mixed with refrigerator oil in each compressor 2 can also be discharged from second exhaust port c.Wherein as shown in Figure 5, each compressor 2 also includes the compression element such as mechanism 21, motor mechanism 22, fuel head in compressor 2 shown in Fig. 5 is the normal fuel head of compressor 2, and namely namely the compressor 2 shown in Fig. 5 is not at rich not also in oil starvation state.The gas returning port b of each compressor 2 is connected to air suction main 1 by suction nozzle 1a, and air suction main 1 is connected with cross valve 14.
First gs-oil separator 4 is provided with the first oil gas entrance f, first gas outlet e and the first oil export g, first oil gas entrance f is connected with first row QI KOU a, first oil export g is connected with gas returning port b by first throttle element 6, it is in series with the first filter 5 between first oil export g and the gas returning port b of each first gs-oil separator 4 simultaneously, as shown in Figure 1, first filter 5 is connected between first throttle element 6 and the first oil export g, thereby through being provided with the first filter 5, the impurity from the first oil export g refrigerator oil discharged can be filtered, avoid impurity to enter into and compressor 2 is caused damage by compressor 2.
Second gs-oil separator 10 is provided with the second oil gas entrance i, the second gas outlet h and the second oil export m, second oil gas entrance i is connected to exhaust main 9, first gas outlet e of each first gs-oil separator 4 is connected with exhaust main 9 by downtake pipe 4a, the second exhaust port c of each compressor 2 is connected with exhaust main 9 by second exhaust pipe 7, and the second gas outlet h is connected with cross valve 14.
Second oil export m is connected with air suction main 1 by second section fluid element 12, and multiple on-line system 100 also includes the second filter 11 simultaneously, and the second filter 11 is connected between second section fluid element 12 and the second oil export m.Thereby through being provided with the second filter 11, the refrigerator oil flowing to gas returning port b can be filtered avoiding impurity to enter and compressor 2 is caused damage by compressor 2.
Multiple on-line system 100 also includes controlling valve 13, controls valve 13 and is connected in parallel with second section fluid element 12, as it is shown in figure 1, the second filter 11 is connected with second section fluid element 12, and the second filter 11 of series connection and second section fluid element 12 are arranged in parallel with controlling valve 13.Alternatively, controlling valve 13 is electromagnetic valve, but it is understood that, the type controlling valve 13 is not limited to this, as long as control valve 13 can also have for other elements opens or closes function.
Specifically, when controlling valve 13 and opening, owing to controlling the fluid resistance fluid resistance less than second section fluid element 12 of valve 13, therefore it is drained into the compressor 2 of operation from the second oil export m refrigerator oil discharged by controlling valve 13.When controlling valve 13 and closing, it is drained into the compressor 2 of operation from the second oil export m refrigerator oil discharged through the second filter 11 and second section fluid element 12.Owing to controlling the fluid resistance fluid resistance less than second section fluid element 12 of valve 13, therefore when controlling valve 13 and opening, the circular flow of refrigerator oil can strengthen, such that it is able to by controlling opening or closing of valve 13, adjust the circular flow of refrigerator oil, and then when compressor 2 is frequency-changeable compressor or positive displacement compressor, when frequency-changeable compressor 2 or the high fan-out capability of positive displacement compressor 2 regulate when running, by controlling opening of valve 13, it is possible to meet the demand that circular flow strengthens.
Each compressor assembly also includes first temperature-detecting device (not shown go out) of the delivery temperature t1 of the first row QI KOU a for detecting compressor 2 and for detecting second temperature-detecting device (not shown go out) of the bottom temp t2 of compressor 2.Controller and the first temperature-detecting device, the second temperature-detecting device and control valve 13 are connected to control opening or closing of valve 13 according to the temperature difference between delivery temperature t1 and bottom temp t2.
Specifically, as shown in Figure 4, the switch motion controlling valve 13 controls, the temperature difference △ T=t1-t2 between the bottom temp t2 of the delivery temperature t1 of compressor 2 and compressor 2 be controlled.The delivery temperature t1 detected and bottom temp t2 is delivered to controller by the first temperature-detecting device and the second temperature-detecting device, controller receives delivery temperature t1 and bottom temp t2, and the temperature difference △ T between delivery temperature t1 and bottom temp t is compared with fiducial value, when temperature difference △ T≤5 DEG C of any one compressor 2, controller controls valve 13 and opens, and otherwise controls valve 13 and is closed.But it is understood that, the concrete numerical value of fiducial value is not limited to this, and the concrete numerical value of fiducial value specifically can limit according to practical situation.
Each check valve assembly 8 includes the first check-valves 8a and the second check-valves 8b, it is in series with the first check-valves 8a between first gas outlet e and the second oil gas entrance i of the first gs-oil separator 4 of each compressor assembly, it is in series with the second check-valves 8b between the second exhaust port c and the second oil gas entrance i of the compressor 2 of each compressor assembly, in other words, downtake pipe 4a is in series with the first check-valves 8a, second exhaust pipe 7 is in series with the second check-valves 8b.
When one of them in two compressors 2 is run and another is out of service; then because of gases at high pressure effect; the first check-valves 8a and the second check-valves 8b in compressor assembly out of service close; in compressor 2 out of service after pressure balance; identical with low-pressure lateral pressure, in compressor 2 out of service, pasta still maintains the normal oil level before shutdown.Simultaneously, because the existence of the first check-valves 8a and the second check-valves 8b, the gases at high pressure discharged from the compressor assembly run will not enter into the first gs-oil separator 4 in compressor assembly out of service and in compressor 2, it is to avoid causes compressor 2 to collaborate because gases at high pressure are back to or is discharged to outside compressor 2 because of pressure reduction by the refrigerator oil in compressor 2 out of service in compressor 2 out of service.
The flow path of refrigerator oil in the compressor assembly run is as follows: in Fig. 1 shown in arrow with three single dotted broken line, the coolant that compressor 2 is discharged is after first time separates, refrigerator oil after separation is connected to the gas returning port b of compressor 2 through the first order return line that the first oil export g of the first gs-oil separator 4 and the first coupled filter 5 and first throttle element 6 are configured to, and refrigerator oil enters in compressor 2 with air-breathing.Meanwhile, in the second gs-oil separator 10, refrigerator oil after secondary separation is connected to after air suction main 1 to enter back into the air-breathing of compressor 2 in the compressor 2 run through second level return line, it is ensured that in compressor 2, refrigerator oil maintains normal pasta.Wherein second level return line can be controlled the oil circuit branch controlling valve 13 of recirculating oil quantity and constitutes by the return line being connected to the second filter 11 and second section fluid element 12 and being provided with.
Outdoor heat exchanger 15 is connected with cross valve 14, cross valve 14 is also connected with the multiple indoor heat exchangers 19 in indoor set, each indoor heat exchanger 19 in indoor set is in series with an indoor restricting element 18, being provided with outdoor restricting element 16 in off-premises station, outdoor restricting element 16 is connected with multiple indoor restricting elements 18 respectively.Alternatively, outdoor restricting element 16 and each indoor restricting element 18 respectively capillary tube or electric expansion valve.Need to illustrate, coolant flow path when refrigeration mode and heating mode of the structure of cross valve 14 and operation principle, multiple on-line system 100, the refrigeration principle of multiple on-line system 100 and heat principle etc. and be prior art, be just not described in detail here.Wherein in Fig. 1-Fig. 3 shown in single solid arrow be refrigeration mode time coolant circulation path, shown in arrow with double joint double dot dash line be heating mode time coolant circulation path, shown in the arrow with three single dotted broken line is the circulation path of refrigerator oil.
Specifically, when each compressor 2 all runs, the coolant containing refrigerator oil that each compressor 2 is discharged enters in the first gs-oil separator 4 by first row QI KOU a, in the first gs-oil separator 4, coolant and refrigerator oil carry out first time separation, and the refrigerator oil after separated is connected to the gas returning port b of compressor 2 by first order return line.
And from the second exhaust port c refrigerator oil discharged or gaseous coolant containing refrigerator oil, enter into the second gs-oil separator 10 through exhaust main 9 after the first gas exports e expellant gas coolant and the refrigerator oil that is not kept completely separate converges after crossing oil strain with the first gs-oil separator 4.
The above-mentioned high-pressure gaseous coolant containing refrigerator oil, after entering the second gs-oil separator 10, carry out gaseous coolant to separate with the second time of refrigerator oil, refrigerator oil after separated is connected on air suction main 1 through second level return line, finally enter back in each compressor 2 with the air-breathing of each compressor 2, achieve all oil circulation of multiple on-line system 100, it is ensured that the dynamic equilibrium of refrigerator oil pasta in each compressor 2.
Multiple on-line system 100 according to the present invention second specific embodiment is described in detail below with reference to Fig. 2.
In this embodiment, with according to first specific embodiment of the present invention the difference is that the structure of check valve assembly 8, as shown in Figure 2, check valve assembly 8 includes a check-valves, first gas outlet e of the first gs-oil separator 4 of each compressor assembly is connected with one end of check-valves 8 with the second exhaust port c of compressor 2, and the other end of check-valves 8 and the second oil gas entrance i are connected.In this embodiment, the number of compressor assembly is two, and other structures of multiple on-line system 100 are identical with according to the structure in first specific embodiment of the present invention, are just not described in detail here.
Of course, it should be understood that the number of compressor assembly is not limited to this, in the example of fig. 3, the number of compressor assembly is three.When the number of compressor assembly is three; the running status of three compressor assemblies includes the following two kinds; one is that a compressor 2 runs, and two other compressor 2 is out of service, then the pasta in two compressors 2 out of service still maintains the normal oil level before shutdown.The refrigerator oil discharged from the first oil export g of the first gs-oil separator 4 refrigerator oil discharged and the second oil export m from the second gs-oil separator 10 in the compressor assembly run all is expelled back into the compressor 2 of operation.
Another kind of situation is that two compressors 2 run, and another one compressor 2 is out of service.The refrigerator oil then discharged from the second gs-oil separator 10 is expelled back into two compressors 2 run respectively, and the refrigerator oil that the first oil export g of the first gs-oil separator 4 in each compressor assembly discharges is expelled back in corresponding compressor 2.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in one or more embodiments in office or example in an appropriate manner.Additionally, when not conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out combining and combining by those skilled in the art.
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is illustrative of, it is impossible to be interpreted as limitation of the present invention, and above-described embodiment can be changed, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.
Claims (10)
1. a multiple on-line system, it is characterised in that including:
Multiple compressor assemblies, each described compressor assembly includes a compressor and first gs-oil separator, and described compressor includes first row QI KOU and gas returning port, and described compressor is additionally provided with for discharging the second exhaust port exceeding the refrigerator oil setting oil level；Described first gs-oil separator is provided with the first gas outlet, the first oil gas entrance and the first oil export, and described first oil gas entrance is connected with described first row QI KOU, and described first oil export is connected with described gas returning port by first throttle element；
Second gs-oil separator, described second gs-oil separator includes the second gas outlet, the second oil gas entrance and the second oil export, described second oil gas entrance is connected with the first gas outlet of the described second exhaust port of each described compressor and each described first gs-oil separator, and described second oil export is connected with the gas returning port of each described compressor by second section fluid element；
Controller, described controller is connected the running status controlling each described compressor with each described compressor assembly；
Controlling valve, described control valve and described second section fluid element are connected in parallel；
Each described compressor assembly also includes first temperature-detecting device of the delivery temperature t1 of the described first row QI KOU for detecting described compressor and for detecting second temperature-detecting device of the bottom temp t2 of described compressor；
Described controller is connected with described first temperature-detecting device, described second temperature-detecting device and described control valve to control opening or closing of described control valve according to the temperature difference between described delivery temperature t1 and described bottom temp t2.
2. multiple on-line system according to claim 1, it is characterized in that, also include multiple check valve assembly, being connected to a described check valve assembly between each described compressor assembly and the described second oil gas entrance of described second gs-oil separator, described check valve assembly is one-way conduction on the direction of the described second oil gas entrance from each described compressor assembly to described second gs-oil separator.
3. multiple on-line system according to claim 2, it is characterized in that, each check valve assembly includes the first check-valves and the second check-valves, it is in series with described first check-valves between described first gas outlet and the described second oil gas entrance of described first gs-oil separator of each described compressor assembly, between described second exhaust port and the described second oil gas entrance of the described compressor of each described compressor assembly, is in series with described second check-valves.
4. multiple on-line system according to claim 2, it is characterized in that, described check valve assembly includes a check-valves, the described first gas outlet of described first gs-oil separator of each described compressor assembly is connected with one end of described check-valves with the described second exhaust port of described compressor, and the other end of described check-valves is connected with described second oil gas entrance.
5. multiple on-line system according to claim 1, it is characterised in that described control valve is electromagnetic valve.
6. multiple on-line system according to claim 1, it is characterised in that be in series with the first filter between described first oil export and the described gas returning port of each described first gs-oil separator.
7. multiple on-line system according to claim 1, it is characterised in that also including the second filter, described second positioned inline is between described second section fluid element and described second oil export.
8. multiple on-line system according to claim 1, it is characterised in that described first throttle element and described second section fluid element respectively capillary tube.
9. multiple on-line system according to claim 1, it is characterised in that each described compressor is constant speed compressor, frequency-changeable compressor or positive displacement compressor.
10. multiple on-line system according to claim 1, it is characterised in that described first row QI KOU is identical with the diameter of described second exhaust port.
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| CN201410378179.4A CN104165478B (en) | 2014-08-01 | 2014-08-01 | multiple on-line system |
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| CN104764253A (en) * | 2015-03-31 | 2015-07-08 | 广东美的暖通设备有限公司 | Refrigerating system |
| JP6638168B2 (en) * | 2015-11-12 | 2020-01-29 | 三菱重工サーマルシステムズ株式会社 | Refrigerant circuit of air conditioner and air conditioner |
| CN108224839B (en) * | 2017-12-29 | 2020-06-09 | Tcl空调器(中山)有限公司 | Multi-split air conditioning system and control method thereof |
| CN111256379A (en) * | 2018-11-30 | 2020-06-09 | 广东美芝精密制造有限公司 | Refrigerating device |
| CN112097418B (en) * | 2020-06-24 | 2022-03-08 | 广东积微科技有限公司 | Automatic oil level maintaining system of compressor and control method thereof |
| CN112032827A (en) * | 2020-08-28 | 2020-12-04 | 青岛海尔空调电子有限公司 | Oil return control method of multi-split air conditioning system |
| CN115727514A (en) * | 2022-11-14 | 2023-03-03 | 中国联合网络通信集团有限公司 | Air conditioning equipment control method and device and readable storage medium |
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| JP2001324236A (en) * | 2000-05-19 | 2001-11-22 | Fujitsu General Ltd | Air conditioner |
| CN2702090Y (en) * | 2003-11-03 | 2005-05-25 | 广东美的集团股份有限公司 | Connection structure in parallel condition of compressor |
| JP5001730B2 (en) * | 2007-06-29 | 2012-08-15 | 三菱重工業株式会社 | Refrigeration equipment |
| EP2487437B1 (en) * | 2011-02-11 | 2015-08-05 | STIEBEL ELTRON GmbH & Co. KG | Heat pump device |
| KR20130134347A (en) * | 2012-05-30 | 2013-12-10 | 삼성전자주식회사 | Air conditioner and method for checking refrigerant amount |
| CN103573626A (en) * | 2012-08-02 | 2014-02-12 | 珠海格力电器股份有限公司 | Dual-rotor compressor for parallel system of compressors and parallel system of compressors |
| CN203024518U (en) * | 2012-12-13 | 2013-06-26 | 广东美的电器股份有限公司 | Oil separator and air conditioner outdoor unit |
| CN103486769B (en) * | 2013-08-31 | 2016-05-04 | 江苏春兰空调设备有限公司 | A kind of oil return apparatus of multi-evaporator inverter air conditioner unit and oily restoration methods thereof |
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