CN104165478A - Multiple on-line system - Google Patents
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- CN104165478A CN104165478A CN201410378179.4A CN201410378179A CN104165478A CN 104165478 A CN104165478 A CN 104165478A CN 201410378179 A CN201410378179 A CN 201410378179A CN 104165478 A CN104165478 A CN 104165478A
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Abstract
The invention discloses a multiple on-line system which comprises a plurality of compressor assemblies, a second oil-gas separator and a controller. Each compressor assembly comprises a compressor and a first oil-gas separator, wherein the compressor comprises a first exhaust opening, a gas return opening and a second exhaust opening. A second oil-gas inlet of a second oil-gas separator is connected with the second exhaust opening of each compressor and a first gas outlet of each first oil-gas separator. A second oil outlet is connected with the gas return opening of each compressor through a second throttling element. According to the multiple on-line system, the oil level of refrigerating machine oil of the compressors in operation can be adjusted, the oil enrichment or oil starvation of the compressors is prevented from happening, the amount of the refrigerating machine oil entering an indoor heat exchanger and an outdoor heat exchanger can be reduced, the energy efficiency of the multiple on-line system is improved, and operation reliability and service life of the multiple on-line system are ensured.
Description
Technical field
The present invention relates to refrigeration system, especially relate to a kind of multi-connected machine system.
Background technology
The reliability of multi-gang air-conditioner unit and life-span depend on reliability and the life-span of each compressor, so 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 changing, system loading needs pondage, therefore in a plurality of compressors, there will be that operation simultaneously, part operation, part stop, the situation such as the low ability output of frequency conversion (transfiguration) compressor or high ability output, each compressor operating load there are differences, very easily cause refrigerator oil between each compressor to occur energy imbalance, some compressors occur that refrigerator oil is not enough, lower than normal oil level generation petrol starvation, when serious, make compressor generation inordinate wear fault.Some compressors occur that refrigerator oil is too much, higher than normal oil level, there is enrichment phenomenon, when refrigerator oil too much accumulates in compressor, easily cause compressor generation liquid hit phenomenon, these all can affect compressor operating safety and service life, even cause compressor damage.
Summary of the invention
The present invention is intended to solve at least to a certain extent one of technical problem in correlation technique.For this reason, one object of the present invention is to propose a kind of multi-connected machine system, the oil level of the refrigerator oil of the compressor in can adjust operation.
According to the multi-connected machine system of the embodiment of the present invention, comprise: a plurality of compressor assemblies, described in each, compressor assembly comprises a compressor and first gs-oil separator, described compressor comprises first row gas port and gas returning port, and described compressor is also provided with the second row gas port that surpasses the refrigerator oil of setting oil level for discharging; Described the first gs-oil separator is provided with the first gas outlet, the first oil gas entrance and the first oil export, and described the first oil gas entrance is connected with described first row gas port, and described the first oil export is connected with described gas returning port by first throttle element; The second gs-oil separator, described the second gs-oil separator comprises the second gas outlet, the second oil gas entrance and the second oil export, described the second oil gas entrance is connected with the described second row gas port of compressor described in each and the first gas outlet of the first gs-oil separator described in each, and described the second oil export is connected with the gas returning port of compressor described in each by second section fluid element; Controller, described controller is connected to control the running status of compressor described in each with compressor assembly described in each.
According to the multi-connected machine system of the embodiment of the present invention, the oil level of the refrigerator oil of the compressor in can adjust operation, avoid compressor to occur rich oil or petrol starvation, security of operation and the service life of each compressor have been guaranteed, refrigerator oil be can reduce and indoor heat exchanger and outdoor heat exchanger entered into, improve multi-connected machine system energy efficiency, guaranteed operational reliability and the service life of multi-connected machine system.
In addition, multi-connected machine system according to the above embodiment of the present invention can also have following additional technical characterictic:
In further embodiment of the present invention, multi-connected machine system also comprises a plurality of check valve assemblies, described in each, between the described second oil gas entrance of compressor assembly and described the second gs-oil separator, be connected with a described check valve assembly, described check valve assembly is one-way conduction on the direction of described the second oil gas entrance from compressor assembly described in each to described the second gs-oil separator.
In examples more of the present invention, each check valve assembly comprises the first check-valves and the second check-valves, described in each, between the described first gas outlet of described first gs-oil separator of compressor assembly and described the second oil gas entrance, be in series with described the first check-valves, described in each, between the described second row gas port of the described compressor of compressor assembly and described the second oil gas entrance, be in series with described the second check-valves.
In other examples of the present invention, described check valve assembly comprises a check-valves, described in each, the described first gas outlet of described first gs-oil separator of compressor assembly is connected with one end of described check-valves with the described second row gas port of described compressor, and the other end of described check-valves is connected with described the second oil gas entrance.
According to preferred embodiments more of the present invention, multi-connected machine system also comprises control valve, and described control valve and described second section fluid element are connected in parallel.
Further, described in each, compressor assembly also comprises for detection of the first temperature-detecting device of the delivery temperature t1 of the described first row gas port of described compressor with for detection of the second temperature-detecting device of the bottom temp t2 of described compressor; Described controller is connected to control opening or closing of described control valve according to the temperature difference between described delivery temperature t1 and described bottom temp t2 with described the first temperature-detecting device, described the second temperature-detecting device and described control valve.
Preferably, described control valve is magnetic valve.
In some embodiments of the invention, described in each, between described first oil export of the first gs-oil separator and described gas returning port, be in series with the first filter.
In some embodiments of the invention, multi-connected machine system also comprises the second filter, and described the second filter is connected between described second section fluid element and described the second oil export.
Alternatively, described first throttle element and described second section fluid element are respectively capillary.
Alternatively, described in each, compressor is constant speed compressor, frequency-changeable compressor or positive displacement compressor.
In examples more of the present invention, described first row gas port is identical with the diameter of described second row gas port.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of multi-connected machine system according to an embodiment of the invention;
Fig. 2 is the schematic diagram of multi-connected machine system in accordance with another embodiment of the present invention;
Fig. 3 is the schematic diagram of the multi-connected machine system of another embodiment according to the present invention;
Fig. 4 is according to the control procedure flow chart to the running status of control valve in the multi-connected machine system of the embodiment of the present invention;
Fig. 5 is according to the schematic diagram of the compressor in the multi-connected machine system of the embodiment of the present invention.
Reference numeral:
Multi-connected machine system 100,
Compressor 2, first row gas port a, gas returning port b, second row gas port c, reservoir 20, compressing mechanism 21, motor mechanism 22, the first gs-oil separator 4, the first gas outlet e, the first oil gas entrance f, the first oil export g, first throttle element 6,
The second gs-oil separator 10, the second gas outlet h, the second oil gas entrance i, the second oil export m,
Second section fluid element 12, check valve assembly 8, the first check-valves 8a, the second check-valves 8b, control valve 13, the first filter 5, the 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 7, the first stop valve 17, the second stop valve 20, air suction main 1, air intake duct 1a, exhaust main 9.
The specific embodiment
Describe embodiments of the invention below in detail, 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 identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " 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 indications such as " circumferentially " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or be integral; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
Below with reference to Fig. 1-Fig. 5, describe in detail according to the multi-connected machine system 100 of the embodiment of the present invention, wherein multi-connected machine system 100 comprises off-premises station and indoor set, between off-premises station and indoor set, by the first stop valve 17 and the second stop valve 20, be assembled together, in indoor set, be provided with a plurality of indoor heat exchangers 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, the multi-connected machine system 100 according to the embodiment of the present invention, comprising: a plurality of compressor assemblies, the second gs-oil separator 10 and controller (scheming not shown).Wherein, each compressor assembly comprises a compressor 2 and first gs-oil separator 4, and compressor 2 comprises first row gas port a and gas returning port b, and compressor 2 is also provided with the second row gas port c that surpasses the refrigerator oil of setting oil level for discharging.Alternatively, first row gas port a is identical with the diameter of second row gas port c, take and meets the demand at when operation pasta pressure rotary compressor 2 that is pressure at expulsion.
Particularly, the type of the compressor 2 in a plurality of compressor assemblies can be identical can be not identical yet, each compressor 2 can be constant speed compressor, frequency-changeable compressor or positive displacement compressor.In concrete example of the present invention, setting oil level is the initial oil level of each compressor 2, but is understandable that, setting oil level can also be to set according to the actual conditions of each compressor 2 are concrete, at this, does not do concrete restriction.Need to describe, when compressor 2 is constant speed compressor, frequency-changeable compressor or positive displacement compressor, the operation principle of compressor 2 etc. is prior art, is not just described in detail here.
The first gs-oil separator 4 is provided with the first gas outlet e, the first oil gas entrance f and the first oil export g, the first oil gas entrance f is connected with first row gas port a, the first oil export g is connected with gas returning port b by first throttle element 6, particularly, the first gs-oil separator 4 has Oil-gas Separation effect, the refrigerant of discharging from the gas returning port b of compressor 2 is drained in the first gs-oil separator 4 and is carried out Oil-gas Separation by the first oil gas entrance f, the gaseous coolant of separating is discharged from the first gas outlet e, the refrigerator oil of separating is expelled back in corresponding compressor 2 from the first oil export g discharge the reducing pressure by regulating flow by first throttle element 6.Wherein, by being provided with first throttle element 6, guarantee the pressure differential between first row gas port a and gas returning port b, to avoid compressor 2 to occur the phenomenon of collaborating, guaranteed the dependability of compressor 2.Alternatively, first throttle element 6 is capillary or electric expansion valve.
The second gs-oil separator 10 comprises the second gas outlet h, the second oil gas entrance i and the second oil export m, the second oil gas entrance i is connected with the second row gas port c of each compressor 2 and the first gas outlet e of each the first gs-oil separator 4, the second oil export m is connected with the gas returning port b of each compressor 2 by second section fluid element 12, particularly, the second gs-oil separator 10 has Oil-gas Separation effect, when gas mixture is drained into the second gs-oil separator 10 when interior from the second oil gas entrance i, can in the second gs-oil separator 10, carry out Oil-gas Separation, the gaseous coolant of separating is discharged from the second gas outlet h, the refrigerator oil of separating is discharged and after the reducing pressure by regulating flow of second section fluid element 12, is expelled back in each compressor 2 from the second oil export m, thereby by being provided with second section fluid element 12, can guarantee to have pressure differential between the second row gas port c of each compressor 2 and gas returning port b, avoid each compressor 2 to occur the phenomenon of collaborating, guarantee the dependability of compressor 2.Alternatively, second section fluid element 12 is capillary or electric expansion valve.
Controller and each compressor assembly are connected to control the running status of each compressor 2, that is to say, controller can control the unlatching of compressor 2 or cut out, when compressor 2 is variable conpacitance compressor, controller can also be controlled 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.Need to describe, the structure of controller and control principle etc. are prior art, are not just described in detail here.
What need to describe is, multi-connected machine system 100 also comprises 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, gas returning port b, outdoor heat exchanger 15 and the indoor heat exchanger 19 of each compressor 2 respectively.
Particularly, in each compressor 2 running, the refrigerant of discharging from the first row gas port a of each compressor 2 can enter into the first gs-oil separator 4 from the first oil gas entrance f and carry out Oil-gas Separation, the refrigerator oil of separating is drained into first throttle element 6 and carries out from gas returning port b, being expelled back into corresponding compressor 2 after reducing pressure by regulating flow from the first oil export g, the gaseous coolant of separating is drained into the second gs-oil separator 10 from the first gas outlet e, if the gaseous coolant of discharging from the first gs-oil separator 4 also doped with separation not completely during refrigerator oil, the gaseous coolant doped with refrigerator oil can carry out Oil-gas Separation for the second time in the second gs-oil separator 10.
Refrigerator oil in certain compressor 2 surpasses these compressor 2 rich oils while setting oil level, in this compressor 2, exceeding the refrigerator oil of setting oil level can discharge from second row gas port c, the refrigerator oil of discharging from second row gas port c is drained into the second gs-oil separator 10, from second row gas port c, be drained into the refrigerator oil the second gs-oil separator 10 and the refrigerant that is 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 of separating is drained into cross valve 14 to enter kind of refrigeration cycle afterwards or to heat circulation from the second gas outlet h, the refrigerator oil gas returning port b from each compressor 2 after the reducing pressure by regulating flow of second section fluid element 12 discharging from the second oil export m is drained in each compressor 2, thereby the refrigerator oil that surpasses setting oil level in the compressor of rich oil 2 can be assigned in other compressors 2, oil level with refrigerator oil in each compressor 2 of dynamic adjustments, and then can avoid compressor 2 to occur rich oil or petrol starvation.
According to the multi-connected machine system 100 of the embodiment of the present invention, each compressor 2 is provided with the second row gas port c that surpasses the refrigerator oil of setting oil level for discharging, by being provided with the second gs-oil separator 10, the second oil gas entrance i of the second gs-oil separator 10 is connected with the first gas outlet e of the second row gas port c of each compressor 2 and each the first gs-oil separator 4, the 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 the refrigerator oil in certain compressor 2 surpasses while setting oil level, the refrigerator oil that surpasses setting oil level is 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, thereby the oil level of the refrigerator oil of the compressor 2 in can adjust operation, avoid compressor 2 to occur rich oil or petrol starvation, avoid some compressor 2 to occur rich oil but petrol starvation appears in some compressor 2, security of operation and the service life of each compressor 2 have been guaranteed, again owing to being provided with the first gs-oil separator 4 and the second gs-oil separator 10, refrigerator oil be can reduce and indoor heat exchanger 19 and outdoor heat exchanger 15 entered into, improve multi-connected machine system 100 efficiencies, operational reliability and the service life of multi-connected machine system 100 have been guaranteed.
In some embodiments of the invention, multi-connected machine system 100 also comprises a plurality of check valve assemblies 8, between the second oil gas entrance i of each compressor assembly and the second gs-oil separator 10, be connected with a check valve assembly 8, check valve assembly 8 is one-way conduction on the direction of the second oil gas entrance i from each compressor assembly to the second gs-oil separator 10.In other words, check valve assembly 8 is ending to the direction of each compressor assembly from the second oil gas entrance i, and refrigerant can only flow to from each compressor assembly the second oil gas entrance i of the second gs-oil separator 10, and can not flow back in each compressor assembly.
More specifically, each check valve assembly 8 at the second row gas port c from corresponding compressor 1 to one-way conduction the direction of the second oil gas entrance i, and each check valve assembly 8 is at the first gas outlet e from corresponding the first gs-oil separator 4 to one-way conduction the direction of the second oil gas entrance i, and high pressure refrigerant cannot be back to compressor 2 and also and cannot be back to the first gs-oil separator 4 from the first gas outlet e from second row gas port c.Thereby at 2 operations of some compressors and some compressor 2 when out of service, can avoid the gases at high pressure of discharging from the compressor 2 of operation to be back in the compressor 2 stopping, cause and collaborate or the refrigerator oil in compressor out of service 2 is discharged outside compressor 2 because of pressure reduction, thereby guaranteed the operational reliability of each compressor 2.
Below with reference to Fig. 1, Fig. 4 and Fig. 5, describe the multi-connected machine system 100 of first specific embodiment according to the present invention in detail.
As shown in Figure 1, according to the multi-connected machine system 100 of the embodiment of the present invention, comprise: 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 18, the first stop valve 17 and the second stop valves 20.
Each compressor assembly comprises a compressor 2 and first gs-oil separator 4, each compressor 2 is provided with first row gas port a, second row gas port c and gas returning port b, each compressor 2 comprises reservoir 20, gas returning port b is located on reservoir 20, second row gas port c surpasses for discharging in each compressor 2 refrigerator oil of setting oil level, but be understandable that, the high-pressure gaseous refrigerant that is mixed with refrigerator oil in each compressor 2 also can be discharged from second row gas port c.Wherein as shown in Figure 5, each compressor 2 also comprises the elements such as compressing mechanism 21, motor mechanism 22, fuel head in compressor 2 shown in Fig. 5 is the normal fuel head of compressor 2, the compressor shown in Fig. 52 not in rich oil state also not in oil starvation state.The gas returning port b of each compressor 2 is connected to air suction main 1 by air intake duct 1a, and air suction main 1 is connected with cross valve 14.
The first gs-oil separator 4 is provided with the first oil gas entrance f, the first gas outlet e and the first oil export g, the first oil gas entrance f is connected with first row gas port a, the first oil export g is connected with gas returning port b by first throttle element 6, between the first oil export g of each the first gs-oil separator 4 and gas returning port b, be in series with the first filter 5 simultaneously, as shown in Figure 1, the first filter 5 is connected between first throttle element 6 and the first oil export g, thereby by being provided with the first filter 5, can filter the impurity the refrigerator oil of discharging from the first oil export g, avoid impurity to enter into compressor 2 and compressor 2 is caused to damage.
The 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, the second oil gas entrance i is connected with exhaust main 9, the first gas outlet e of each the first gs-oil separator 4 is connected with exhaust main 9 by downtake pipe 4a, the second row gas 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.
The second oil export m is connected with air suction main 1 by second section fluid element 12, and multi-connected machine system 100 also comprises that the second filter 11, the second filters 11 are connected between second section fluid element 12 and the second oil export m simultaneously.Thereby by being provided with the second filter 11, can filter to avoid impurity to enter in compressor 2 and compressor 2 is caused to damage flowing to the refrigerator oil of gas returning port b.
Multi-connected machine system 100 also comprises control valve 13, control valve 13 is connected in parallel with second section fluid element 12, as 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 control valve 13.Alternatively, control valve 13 is magnetic valve, but is understandable that, the type of control valve 13 is not limited to this, as long as control valve 13 can also have the function of opening or closing for other elements.
Particularly, when control valve 13 is opened, because the fluid resistance of control valve 13 is less than the fluid resistance of second section fluid element 12, so be drained into the compressor 2 of operation by control valve 13 from the refrigerator oil of the second oil export m discharge.When control valve 13 is closed, the refrigerator oil of discharging from the second oil export m is drained into the compressor 2 of operation through the second filter 11 and second section fluid element 12.Because the fluid resistance of control valve 13 is less than the fluid resistance of second section fluid element 12, therefore when control valve 13 is opened, the circular flow of refrigerator oil can strengthen, thereby can be by controlling opening or closing of control 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 adjusting of positive displacement compressor 2 operation, by controlling opening of control valve 13, can meet the demand that circular flow strengthens.
Each compressor assembly also comprises for detection of the first temperature-detecting device (scheming not shown) of the delivery temperature t1 of the first row gas port a of compressor 2 with for detection of the second temperature-detecting device (scheming not shown) of the bottom temp t2 of compressor 2.Controller is connected to control opening or closing of control valve 13 according to the temperature difference between delivery temperature t1 and bottom temp t2 with the first temperature-detecting device, the second temperature-detecting device and control valve 13.
Particularly, as shown in Figure 4, the switch motion of control valve 13 is controlled, and by the temperature difference △ T=t1-t2 between the delivery temperature t1 of compressor 2 and the bottom temp t2 of compressor 2, is controlled.The first temperature-detecting device and the second temperature-detecting device are delivered to controller by the delivery temperature t1 detecting and bottom temp t2, controller receives delivery temperature t1 and bottom temp t2, and temperature difference △ T and fiducial value between delivery temperature t1 and bottom temp t are compared, when temperature difference △ T≤5 of any one compressor 2 ℃, controller is controlled control valve 13 and is opened, otherwise control valve 13 is in closed condition.But be understandable that, the concrete numerical value of fiducial value is not limited to this, and the concrete numerical value of fiducial value can specifically limit according to actual conditions.
Each check valve assembly 8 comprises the first check-valves 8a and the second check-valves 8b, between the first gas outlet e of the first gs-oil separator 4 of each compressor assembly and the second oil gas entrance i, be in series with the first check-valves 8a, between the second row gas port c of the compressor 2 of each compressor assembly and the second oil gas entrance i, be in series with the second check-valves 8b, in other words, on downtake pipe 4a, be in series with the first check-valves 8a, on second exhaust pipe 7, be in series with the second check-valves 8b.
One of them operation in two compressors 2 and another is when out of service; 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; after compressor 2 internal pressure balances out of service; identical with low-pressure lateral pressure, the interior pasta of compressor 2 out of service still maintains the normal pasta level before shutdown.Simultaneously, because the existence of the first check-valves 8a and the second check-valves 8b, from the compressor assembly of operation, the gases at high pressure of discharging can not enter into the first gs-oil separator 4 and the compressor 2 of compressor assembly out of service, have avoided in compressor out of service 2, causing compressor 2 collaborate or the refrigerator oil in compressor out of service 2 is discharged to outside compressor 2 because of pressure reduction because gases at high pressure are back to.
The flow path of the refrigerator oil in the compressor assembly of operation is as follows: as being with in Fig. 1 as shown in three dashdotted arrows of list, the refrigerant that compressor 2 is discharged is after separation for the first time, the first order return line that refrigerator oil after separation is configured to through the first oil export g of the first gs-oil separator 4 and coupled the first filter 5 and first throttle element 6 is connected to the gas returning port b of compressor 2, and refrigerator oil is with the air-breathing compressor 2 that enters into.Simultaneously, refrigerator oil in the second gs-oil separator 10 after secondary separation with the air-breathing compressor 2 that enters into again operation of compressor 2, has guaranteed that the interior refrigerator oil of compressor 2 maintains normal pasta after second level return line is connected to air suction main 1.Wherein second level return line consists of the oil circuit branch that is connected with the return line of the second filter 11 and second section fluid element 12 and is provided with the control valve 13 that can control recirculating oil quantity.
Outdoor heat exchanger 15 is connected with cross valve 14, cross valve 14 is also connected with a plurality of indoor heat exchangers 19 in indoor set, each indoor heat exchanger 19 in indoor set is in series with an indoor restricting element 18, in off-premises station, be provided with outdoor restricting element 16, outdoor restricting element 16 is connected with a plurality of indoor restricting elements 18 respectively.Alternatively, outdoor restricting element 16 and each indoor restricting element 18 are respectively capillary or electric expansion valve.What need to describe is, the refrigeration principle of refrigerant flow path when refrigeration mode and heating mode of the structure of cross valve 14 and operation principle, multi-connected machine system 100, multi-connected machine system 100 and heat principle etc. and be prior art, is not just described in detail here.Wherein in Fig. 1-Fig. 3 shown in single solid arrow be refrigeration mode time refrigerant circulation path, with shown in the arrow of double joint double dot dash line be heating mode time refrigerant circulation path, with being the circulation path of refrigerator oil shown in three dashdotted arrows of list.
Particularly, when each compressor 2 all moves, the refrigerant containing refrigerator oil that each compressor 2 is discharged enters in the first gs-oil separator 4 by first row gas port a, in the first gs-oil separator 4, refrigerant and refrigerator oil carry out separatedly for the first time, and the refrigerator oil after separation is connected to the gas returning port b of compressor 2 by first order return line.
And the refrigerator oil of discharging from second row gas port c or containing the gaseous coolant of refrigerator oil, converge by exhaust main 9 and enter into the second gs-oil separator 10 with the gas coolant of discharging from the first gas outlet e after the first gs-oil separator 4 filter oil and completely not separated refrigerator oil.
The above-mentioned high-pressure gaseous refrigerant containing refrigerator oil, enter after the second gs-oil separator 10, carry out the separated for the second time of gaseous coolant and refrigerator oil, refrigerator oil after separation is connected on air suction main 1 through second level return line, last air-breathing each compressor 2 that enters into again with each compressor 2, realize the equal oil circulation of multi-connected machine system 100, guaranteed the dynamic equilibrium of refrigerator oil pasta in each compressor 2.
Below with reference to Fig. 2, describe the multi-connected machine system 100 of second specific embodiment according to the present invention in detail.
In this embodiment, from according to the present invention first specific embodiment different be the structure of check valve assembly 8, as shown in Figure 2, check valve assembly 8 comprises a check-valves, the first gas outlet e of the first gs-oil separator 4 of each compressor assembly and the second row gas port c of compressor 2 are connected with one end of check-valves 8, and the other end of check-valves 8 is connected with the second oil gas entrance i.In this embodiment, the number of compressor assembly is two, and other structures of multi-connected machine system 100 are identical with the structure in first specific embodiment according to the present invention, are just not described in detail here.
Certainly can understand, the number of compressor assembly is not limited to this, and 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 comprises following two kinds; a kind of is 2 operations of a compressor, and two other compressor 2 is out of service, and the pasta in two compressors 2 out of service still maintains the normal pasta level before shutdown.The refrigerator oil of discharging from the first oil export g of the first gs-oil separator 4 in the compressor assembly of operation and being all expelled back into the compressor 2 of operation from the refrigerator oil that the second oil export m of the second gs-oil separator 10 discharges.
Another kind of situation is 2 operations of two compressors, and another one compressor 2 is out of service.The refrigerator oil of discharging from the second gs-oil separator 10 is expelled back into respectively the compressor 2 of two operations, 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, First Characteristic Second Characteristic " 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, First Characteristic Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic or oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " can be First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
In the description of this description, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And, the specific features of description, structure, material or feature can one or more embodiment in office or example in suitable mode combination.In addition,, not conflicting in the situation that, those skilled in the art can carry out combination and combination by the feature of the different embodiment that describe in this description or example and different embodiment or example.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (12)
1. a multi-connected machine system, is characterized in that, comprising:
A plurality of compressor assemblies, described in each, compressor assembly comprises a compressor and first gs-oil separator, described compressor comprises first row gas port and gas returning port, and described compressor is also provided with the second row gas port that surpasses the refrigerator oil of setting oil level for discharging; Described the first gs-oil separator is provided with the first gas outlet, the first oil gas entrance and the first oil export, and described the first oil gas entrance is connected with described first row gas port, and described the first oil export is connected with described gas returning port by first throttle element;
The second gs-oil separator, described the second gs-oil separator comprises the second gas outlet, the second oil gas entrance and the second oil export, described the second oil gas entrance is connected with the described second row gas port of compressor described in each and the first gas outlet of the first gs-oil separator described in each, and described the second oil export is connected with the gas returning port of compressor described in each by second section fluid element;
Controller, described controller is connected to control the running status of compressor described in each with compressor assembly described in each.
2. multi-connected machine system according to claim 1, it is characterized in that, also comprise a plurality of check valve assemblies, described in each, between the described second oil gas entrance of compressor assembly and described the second gs-oil separator, be connected with a described check valve assembly, described check valve assembly is one-way conduction on the direction of described the second oil gas entrance from compressor assembly described in each to described the second gs-oil separator.
3. multi-connected machine system according to claim 2, it is characterized in that, each check valve assembly comprises the first check-valves and the second check-valves, described in each, between the described first gas outlet of described first gs-oil separator of compressor assembly and described the second oil gas entrance, be in series with described the first check-valves, described in each, between the described second row gas port of the described compressor of compressor assembly and described the second oil gas entrance, be in series with described the second check-valves.
4. multi-connected machine system according to claim 2, it is characterized in that, described check valve assembly comprises a check-valves, described in each, the described first gas outlet of described first gs-oil separator of compressor assembly is connected with one end of described check-valves with the described second row gas port of described compressor, and the other end of described check-valves is connected with described the second oil gas entrance.
5. multi-connected machine system according to claim 1, is characterized in that, also comprises control valve, and described control valve and described second section fluid element are connected in parallel.
6. multi-connected machine system according to claim 5, it is characterized in that, described in each, compressor assembly also comprises for detection of the first temperature-detecting device of the delivery temperature t1 of the described first row gas port of described compressor with for detection of the second temperature-detecting device of the bottom temp t2 of described compressor;
Described controller is connected to control opening or closing of described control valve according to the temperature difference between described delivery temperature t1 and described bottom temp t2 with described the first temperature-detecting device, described the second temperature-detecting device and described control valve.
7. multi-connected machine system according to claim 5, is characterized in that, described control valve is magnetic valve.
8. multi-connected machine system according to claim 1, is characterized in that, described in each, between described first oil export of the first gs-oil separator and described gas returning port, is in series with the first filter.
9. multi-connected machine system according to claim 1, is characterized in that, also comprises the second filter, and described the second filter is connected between described second section fluid element and described the second oil export.
10. multi-connected machine system according to claim 1, is characterized in that, described first throttle element and described second section fluid element are respectively capillary.
11. multi-connected machine systems according to claim 1, is characterized in that, described in each, compressor is constant speed compressor, frequency-changeable compressor or positive displacement compressor.
12. multi-connected machine systems according to claim 1, is characterized in that, described first row gas port is identical with the diameter of described second row gas port.
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| CN201410378179.4A CN104165478B (en) | 2014-08-01 | 2014-08-01 | multiple on-line system |
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| CN201410378179.4A CN104165478B (en) | 2014-08-01 | 2014-08-01 | multiple on-line system |
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| CN104165478B CN104165478B (en) | 2016-06-29 |
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| CN104165478B (en) | 2016-06-29 |
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