CN101451757A - Multi-connection air conditioner oil balancing and gas balancing control device - Google Patents
Multi-connection air conditioner oil balancing and gas balancing control device Download PDFInfo
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- CN101451757A CN101451757A CN 200710195434 CN200710195434A CN101451757A CN 101451757 A CN101451757 A CN 101451757A CN 200710195434 CN200710195434 CN 200710195434 CN 200710195434 A CN200710195434 A CN 200710195434A CN 101451757 A CN101451757 A CN 101451757A
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Abstract
The invention discloses an oil and gas balance controller of multi-connected air conditioner for the oil balance of compressors of at least two outdoor sets connected in parallel, wherein the oil balance controller comprises oil storage containers which communicate to the bottom of respective compressors of the plurality of outdoor sets, vent-pipes of respective compressors communicate to the oil storage containers by an electromagnetic valve (1), every two oil storage containers communicate to one another by an oil balance connecting pipe to which each oil container communicates by an electromagnetic valve (4) and air suction pipes of respective compressors communicate by an electromagnetic valve (2), and each oil storage container communicates to the relative air suction pipes of respective compressors by an electromagnetic valve (3). The invention provides an oil and gas balance controller of multi-connected air conditioner for solving the problem of the oil balance of compressors in the various statuses.
Description
Technical field
The present invention relates to air-conditioning control, particularly oily balance, the gas balancing control device of combined air conditioners.
Background technology
Combined air conditioners is a kind of air-conditioning unit by many outdoor unit parallel connections and many indoor units parallel connections.
Along with applying of converter technique, the multi-evaporator inverter air conditioner system has obtained swift and violent development.The multi-evaporator inverter air conditioner system compares with common air-conditioner, has refrigeration, heats advantages such as rapid, energy-efficient.The multi-evaporator inverter air conditioner system makes up layout, good sub-load efficient and using method flexibly freely with it, has adapted to the demand in market, has satisfied the requirement of different scales building.To the multi-evaporator inverter air conditioner system, the combined system of especially many off-premises stations, oily balance, gas balance find good solution in addition.
The requirement of two aspects is arranged about oily balance:
On the one hand require oil can get back to each compressor timely and effectively, otherwise the compressor oil starvation can cause burning, this is very important to the multi-gang air conditioner of the high drop of long pipe arrangement.
On the other hand, the assurance system in each compressor oil mass even, guarantee that every compressor has enough oil masses, otherwise the compressor oil content that has is too much, influence refrigeration, heating effect, even produce oil and hit, and the few compressor of oil content is burnt.
The gas balance is the low pressure gas revolute balance, to guarantee the low-pressure balance of each compressor chamber.
For the multi-gang air-conditioner refrigerating operaton, because low-pressure end is communicated with, low pressure realizes balance automatically.But for the multi-gang air-conditioner heating operation; when the indoor set load is low; off-premises station exists one or more modules to shut down; has only the part of module heating operation; by analyzing the closed circuit that heats of multi-gang air conditioner, the compressor chamber low-pressure end that can learn the compressor of shutdown and operation is because the check valve non-return effect, and low-pressure end is not communicated with; can't realize low-pressure balance, influence the stability of whole system like this.On the other hand; though compressor self high-low pressure of shutting down is a balance; but owing to be not communicated with the low-pressure end of operation; the compressor pressure of shutting down is higher; its corresponding saturation temperature is also higher; the Dui Ying oily temperature degree of superheat lower (oily temperature deducts the saturation temperature of low pressure correspondence) is difficult to reach oily startup temperature condition so like this.When indoor set is loaded increase, need to open the compressor of shutting down, the compressor of shutdown does not reach the condition of startup owing to oily temperature, and can not start.Therefore, the gas balance is very important concerning combined air conditioners.
Publication number is CN 1590923A, and denomination of invention provides a kind of multi-compressor oil equalizing system for the Chinese invention patent of " the oily equalizing system of multi-compressor ".The described a kind of oily equalizing system that is used for the multi-compressor of refrigerant loop of this patent, wherein at least three parallel connections of compressor, oily equalizing system comprises: be used for the casing of compressor oily equalizer line connected to one another; And the shunt valve that is used for oily equalizer line is connected to the waste side refrigerant lines that is used for compressor, wherein the casing of each compressor directly is connected by oily equalizer line with the casing of each residual compression machine.Referring to shown in Figure 1, this figure is the described oily equalizing system schematic cross-section of this patent.In refrigerant loop Kb, three compressors 11,12,13 are connected to waste side refrigeration line 15 and suction side refrigerant lines 16, and compressor is parallel like this connects.Each compressor 11,12,13 comprises that casing 11a, 12a and 13a directly are connected by oily equalizer line 17.The waste side refrigerant lines 15 of compressor 11,12,13 is connected to oily equalizer line 17 by shunt valve 19, and described shunt valve 19 is provided with open/closed valve 18 at mid portion.Though the described oily equalizing system of this patent can realize that the oil of three compressors is balanced, the compressor that uses this oil equalizing system must be the low-pressure type compressor.If three compressors 11,12,13 are high pressure compressor, when compressor 11 work, when compressor 12 and 13 cuts out, because compressor 11 is in high pressure conditions, and the pressure of compressor 12 and compressor 13 is lower than the pressure of compressor 11, so the oil of compressor 11 will continue to flow to compressor 12 and compressor 13, can't realize the compressor oil equilibrium.
Application number is " 200510108151.X ", and denomination of invention discloses a kind of multi-connection air conditioner oil balancing control method for the Chinese invention patent application of " a kind of control method of multi-connection air conditioner oil balancing ".The described control method of this patent application may further comprise the steps: the outdoor main frame of combined air conditioners and one group of handset by oil equalizing pipe in parallel after, its each compressor oil pocket communicates with the low pressure air suction side, make each compressor electric expansion valve of on the condenser tubule, connecting earlier, on air intake duct, connect a low-pressure sensor, make between each electric expansion valve in parallel again, when unit when normal operation enters equal oily process, the aperture of each electric expansion valve by regulating compressor assembly makes between the compressor oil pocket pressure form enough pressure reduction and impels the refrigeration oil directed flow to realize equal oil in the low compressor of pressure.The described control method of this patent application during for duty, can realize the equal oil between each compressor at each compressor, but as compressor when being in stopped status, just be difficult to realize between the compressor by process.
Therefore, how to provide a kind of oily balance, gas balancing control device of combined air conditioners, in the time of can effectively solving compressor and be in various state, the oily balance between the compressor is those skilled in the art's technical issues that need to address.
Summary of the invention
The oily balance, the gas balancing control device that the purpose of this invention is to provide a kind of combined air conditioners, when being used to solve compressor and being in various state, the oily equilibrium problem between the compressor.
Specifically, the embodiment of the invention provides a kind of oily balance, gas balancing control device of combined air conditioners, be used for the oily balance of at least two outdoor units compressor when in parallel, described oily balance control device comprises the oil storage tank that corresponding with described many outdoor units respectively every compressor bottom is connected; Be communicated with by magnetic valve one between described each compressor exhaust pipe and the oil storage tank; Be communicated with by oily balance tube connector between per two oil storage tanks; Each oil storage tank is connected with oily balance tube connector by magnetic valve four; Be connected by magnetic valve two between each compressor suction duct and the oily balance tube connector, be connected by magnetic valve three between each oil storage tank and the corresponding compressor suction duct.
Preferably, described off-premises station comprises off-premises station one and off-premises station two at least, when off-premises station one oil suction, off-premises station two oil extractions, equal oily control procedure comprises that the magnetic valve two of controlling off-premises station one opens the scheduled time one, the magnetic valve one of off-premises station one, magnetic valve three, magnetic valve four are closed the described scheduled time one, magnetic valve one, the magnetic valve four of control off-premises station two are opened the described scheduled time one, and the magnetic valve two of off-premises station two, magnetic valve three are closed the described scheduled time one.
Preferably, described off-premises station comprises off-premises station one, off-premises station two and off-premises station three, when off-premises station one oil suction, off-premises station two and off-premises station three oil extractions, equal oily control procedure comprises that the magnetic valve two of controlling off-premises station one opens the scheduled time one, and the magnetic valve one of off-premises station one, magnetic valve three, magnetic valve four are closed the described scheduled time one; Control magnetic valve one, the magnetic valve four of off-premises station two simultaneously and open the described scheduled time one, the magnetic valve two of off-premises station two, magnetic valve three are closed the described scheduled time one; Control magnetic valve one, the magnetic valve four of off-premises station three simultaneously and open the described scheduled time one, the magnetic valve two of off-premises station three, magnetic valve three are closed the described scheduled time one.
Preferably, the described scheduled time one is 1.5 to 3 minutes.
Preferably, the interval scheduled time two between each described equal oily control procedure.
Preferably, the described scheduled time two is 10 to 30 minutes.
Preferably, the described scheduled time one is 1.5 to 3 minutes.
Preferably, be connected by magnetic valve five between each compressor exhaust pipe and the oily balance tube connector.
Preferably, during described air-conditioning heating operation, control is in magnetic valve five unlatchings of the off-premises station of stopped status.
Preferably, control the gas balance that described magnetic valve five and magnetic valve two are realized described combined air conditioners.
The oily balance of the described combined air conditioners of the embodiment of the invention, gas balancing control device, owing to be provided with oil storage tank respectively on the pipeline that is connected in the every compressor bottom of described many outdoor unit correspondences, be communicated with by magnetic valve one between described each compressor exhaust pipe and the oil storage tank; Be communicated with by oily balance tube connector between per two oil storage tanks; Each oil storage tank is connected with oily balance tube connector by magnetic valve four; Be connected by magnetic valve two between each compressor suction duct and the oily balance tube connector, be connected by magnetic valve three between each oil storage tank and the corresponding compressor suction duct.Make that by control opens solenoid valve one unnecessary oil flows to oil storage tank in the compressor; realize the outer all oil of compressor body; this equal oily mode is carried out not shutting down not change under system's running frequency, and the unlatching by the control magnetic valve or the flow direction of closing control oil and flow reach equal oily effect.Operation has no effect the oily balance control device of the described combined air conditioners of the embodiment of the invention to air-conditioning system, and the stability of a system is good.When certain off-premises station is shut down, carry out equal oil between the off-premises station of other operations, the off-premises station that does not move does not participate in equal oil, does not influence the oil mass in the constant pressure machine of shutdown like this.When having only an off-premises station operation, also can realize the equal oil of self.
A main oil equalizing pipe in the oil balance tube road is used gas balance pipe magnetic valve two pipelines, and pipeline is saved, and structure is ingenious.
System runs well, and during inequality oil, magnetic valve two can be used as gas balance pipe usefulness, realizes the gas balance; When all oily, gas balance pipe magnetic valve two is realized all purposes of oil as oil equalizing pipe usefulness.So all oil can be realized the gas balance again, and both unite two into one.
In addition, oil equalizing pipe way solenoid valve two can also play the release effect, prevents hypertonia in the oil equalizing pipe, causes booster.When non-equal oil running or all off-premises stations are all shut down; as long as open the magnetic valve two of an off-premises station; oil equalizing pipe road and compressor are communicated with, and the high pressure in the oil equalizing pipe road just is discharged in the compressor by magnetic valve two paths and goes, and plays the effect that prevents booster.
Description of drawings
Fig. 1 is a prior art multi-compressor oil equalizing system structure chart;
Fig. 2 A is a kind of user mode structure chart of control device first embodiment of the present invention;
Fig. 2 B is the another kind of user mode structure chart of control device first embodiment of the present invention;
Fig. 3 A is first kind of user mode structure chart of control device second embodiment of the present invention;
Fig. 3 B is second kind of user mode structure chart of control device second embodiment of the present invention;
Fig. 3 C is the third user mode structure chart of control device second embodiment of the present invention;
Fig. 3 D is the 4th kind of user mode structure chart of control device second embodiment of the present invention;
Fig. 3 E is the 5th kind of user mode structure chart of control device second embodiment of the present invention;
Fig. 3 F is the 6th kind of user mode structure chart of control device second embodiment of the present invention;
Fig. 4 is oily balance of the present invention, gas balancing control device the 3rd example structure figure;
Fig. 5 is oily balance of the present invention, gas balancing control device the 4th example structure figure.
The specific embodiment
The invention provides a kind of oily balance, gas balancing control device of combined air conditioners, when being used to solve compressor and being in various state, the oily equilibrium problem between the compressor.
In order to make those skilled in the art understand the present invention program better, the present invention is described in further detail below in conjunction with concrete drawings and embodiments.
Referring to Fig. 2 A and Fig. 2 B, Fig. 2 A is a kind of user mode structure chart of control device first embodiment of the present invention; Fig. 2 B is the another kind of user mode structure chart of control device first embodiment of the present invention.
The oily balance of the described combined air conditioners of first embodiment of the invention, gas balancing control device are used for two off-premises stations---the gentle balance of oily balance when first off-premises station 1 and 2 parallel connections of second off-premises station between first compressor 11 and second compressor 21.
Described oily balance, first oil storage tank 12 that gas balancing control device comprises to be connected with first compressor, 11 bottoms, second oil storage tank 22 that is connected with second compressor, 21 bottoms, be communicated with by magnetic valve SV1 between the first compressor exhaust pipe 11b and first oil storage tank 12, be communicated with by magnetic valve SV6 between the second compressor exhaust pipe 21b and second oil storage tank 22, be communicated with by oily balance tube connector 3 between first oil storage tank 12 and second oil storage tank 22; First oil storage tank 12 is connected with oily balance tube connector 3 by magnetic valve SV4; Second oil storage tank 22 is connected with oily balance tube connector 3 by magnetic valve SV9; Be connected by magnetic valve SV2 between the first compressor suction duct 11a and the oily balance tube connector 3, be connected by magnetic valve SV7 between the second compressor suction duct 21a and the oily balance tube connector 3, be connected by magnetic valve SV3 between first oil storage tank 12 and the first compressor suction duct 11a, be connected by magnetic valve SV8 between second oil storage tank 22 and the second compressor suction duct 21a.
The oily balance of the described combined air conditioners of the embodiment of the invention, gas balancing control device, owing to be provided with oil storage tank respectively on the pipeline that is connected in the every compressor bottom of described many outdoor unit correspondences, be communicated with by first magnetic valve between described each compressor exhaust pipe and the oil storage tank; Be communicated with by oily balance tube connector 3 between per two oil storage tanks; Each oil storage tank is connected with oily balance tube connector 3 by the 4th magnetic valve; Be connected by second magnetic valve between each compressor suction duct and the oily balance tube connector 3, be connected by the 3rd magnetic valve between each oil storage tank and the corresponding compressor suction duct.Open first magnetic valve by control and make that unnecessary oil flows to oil storage tank in the corresponding compressor; realize the outer all oil of this compressor body; this equal oily mode is carried out not shutting down not change under system's running frequency; the flow direction by control unlatching of magnetic valve or closing control oil and flowing reaches equal oily effect.
Operation has no effect to air-conditioning system for the oily balance of the described combined air conditioners of the embodiment of the invention, gas balancing control device, and the stability of a system is good.When certain off-premises station is shut down, carry out equal oil between the off-premises station of other operations, the off-premises station that does not move does not participate in equal oil, does not influence the oil mass in the compressor of shutdown like this.When having only an off-premises station operation, also can realize the equal oil of self.
A main oil equalizing pipe in the oil balance tube road is used gas balance pipe magnetic valve SV2 and magnetic valve SV7 pipeline, and pipeline is saved, and structure is ingenious.
System runs well, and during inequality oil, magnetic valve SV2 and magnetic valve SV7 can be used as gas balance pipe usefulness, realize the gas balance; When all oily, gas balance pipe magnetic valve SV2 and magnetic valve SV7 realize all purposes of oil as oil equalizing pipe usefulness.So all oil can be realized the gas balance again, and both unite two into one.
In addition, oil equalizing pipe way solenoid valve SV2 and magnetic valve SV7 can also play the release effect, prevent hypertonia in the oil equalizing pipe, cause booster.When non-equal oil running or all off-premises stations are all shut down; as long as open the magnetic valve SV2 and the magnetic valve SV7 of an off-premises station; oil equalizing pipe road and compressor are communicated with; high pressure in the oil equalizing pipe road just is discharged in the compressor by magnetic valve SV2 and magnetic valve SV7 path and goes, and plays the effect that prevents booster.
For the oily balance that is illustrated more clearly in the described combined air conditioners of the embodiment of the invention, the control procedure of gas balancing control device, specify control procedure below in conjunction with Fig. 2 A and Fig. 2 B.
All the process of oil is as follows between first compressor 11 and second compressor 21 among the oily balance of the described combined air conditioners of the embodiment of the invention, gas balancing control device realization Fig. 1:
Participate in each magnetic valve effect of all oil control and control as follows:
Table 1 participates in all each magnetic valve effects (is example with concrete structure shown in Fig. 2 A and Fig. 2 B) of oil control
| Magnetic valve | Effect |
| Magnetic valve SV1 | When all oily, if 1 oil extraction of first off-premises station, magnetic valve SV1 opens, and makes high pressure for first |
| Magnetic valve SV6 | When all oily, if 2 oil extractions of second off-premises station, magnetic valve SV6 opens, and makes high pressure for second |
| In first off-premises station 1. | |
| Magnetic valve SV2 | When all oily, if 1 oil suction of first off-premises station, magnetic valve SV2 opens, so that oil is drawn onto in the first constant pressure machine 1.During the non-equal oil, opens solenoid valve SV2, release is with preventing pipe group booster; Simultaneously, can realize the gas balance for the off-premises station of heating operation and the off-premises station of shutdown. |
| Magnetic valve SV7 | When all oily, if 2 oil suctions of second off-premises station, magnetic valve SV7 opens, so that oil is drawn onto in the second constant pressure machine 2.During the non-equal oil, opens solenoid valve SV7, release usefulness prevents pipe group booster; Simultaneously, can realize the gas balance for the off-premises station of heating operation and the off-premises station of shutdown. |
| Magnetic valve SV3 | In non-equal when oil, opens solenoid valve SV3 realizes the air pressure balance between first |
| Magnetic valve SV8 | In non-equal when oil, opens solenoid valve SV8 realizes the air pressure balance between second |
| Magnetic valve SV4 and |
2 on first compressor 1 and second compressor are all during oil, first off-premises station, 1 opens solenoid valve SV4 or second off-premises station, 2 opens solenoid valve SV9 are so that all oily (the off-premises station opens solenoid valve SV4 or the SV9 of operation, the off-premises station that does not move is opens solenoid valve SV4 or SV9 not). |
All the implementation procedure of oil is as follows:
Multi-gang air conditioner of the present invention runs well, when not carrying out all oil, magnetic valve SV3 and magnetic valve SV8 are held open, make low pressure for first oil storage tank 12 and second oil storage tank 22, be convenient to that unnecessary oil content does not flow in first oil storage tank 12 and second oil storage tank 22 in first compressor 11 and second compressor 21.
In the time of need carrying out all oil, control the magnetic valve SV3 of first compressor 11 and the magnetic valve SV8 of second compressor 21 and close.
When between first compressor 11 and second compressor 21 all oil comprise two processes: two processes (referring to Fig. 2 B) of carrying out in the time of 11 oil extractions of first compressor and 21 oil suctions of second compressor, perhaps two processes (referring to Fig. 2 A) of carrying out 21 oil extractions of second compressor and 11 oil suctions of first compressor time.
Situation with 2 off-premises stations shown in Fig. 2 A and Fig. 2 B is an example, and the control of each magnetic valve requires referring to table 2 when all oily.
The control of equal oily each magnetic valve of process of table 2
Referring to Fig. 2 B, 1 oil extraction of first off-premises station, during 2 oil suctions of second off-premises station, the magnetic valve SV1 that control links to each other with the first compressor exhaust pipe 11b opens, a high pressure is provided for first oil storage tank 12, the magnetic valve SV4 of first off-premises station 1 opens, the magnetic valve SV7 of second off-premises station 2 opens, oil in first oil storage tank 12 of such first off-premises station 1 passes through the magnetic valve SV4 of first off-premises station 1 and the magnetic valve SV7 of second off-premises station 2 under the high pressure effect, the oil of first compressor 11 is forced in second compressor 21, has realized equal oil.
Referring to Fig. 2 A, when 1 oil suction of first off-premises station, 2 oil extractions of second off-premises station, the magnetic valve SV2 that controls first off-premises station 1 opens the scheduled time one, the magnetic valve SV1 of first off-premises station 1, magnetic valve SV3, magnetic valve SV4 close the described scheduled time one, magnetic valve SV7, magnetic valve SV8 that magnetic valve SV6, the magnetic valve SV9 that controls second off-premises station 2 opens the described scheduled time one, the second off-premises station 2 close the described scheduled time one.
The scheduled time one is relevant with the magnetic valve size, can be set at 2 minutes.The scheduled time one can be set at concrete certain value range in 1.5 to 3 minutes.
After the scheduled time one, equal oily process finishes, and controls the magnetic valve SV4 of first off-premises station 1 and the magnetic valve SV7 of second off-premises station 2 and closes, and the magnetic valve SV8 of second off-premises station 2 and first off-premises station, 1 magnetic valve SV3 all open.After the interval scheduled time two, repeat above-mentioned equal oily process control.
The interval scheduled time two between each described equal oily control procedure.
The described scheduled time two is equal oily blanking time, and this time is relevant with the oil drain quantity of compressor, and oil drain quantity is big more, and all oil blanking time just should be short more, can be 15 minutes.The described scheduled time two can be certain occurrence in 10 to 30 minutes.
Referring to Fig. 2 B, when 2 oil suctions of second off-premises station, 1 oil extraction of first off-premises station, the magnetic valve SV7 that controls second off-premises station 2 opens the scheduled time one, the magnetic valve SV6 of second off-premises station 2, magnetic valve SV8, magnetic valve SV9 close the described scheduled time one, magnetic valve SV2, magnetic valve SV3 that magnetic valve SV1, the magnetic valve SV4 that controls first off-premises station 1 opens the described scheduled time one, the first off-premises station 1 close the described scheduled time one.
After the scheduled time one, equal oily process finishes, and controls the magnetic valve SV9 of second off-premises station 2 and the magnetic valve SV2 of first off-premises station 1 and closes, and the magnetic valve SV3 of first off-premises station 1 and second off-premises station, 2 magnetic valve SV8 all open.After the interval scheduled time two, repeat above-mentioned equal oily process control.The interval scheduled time two between each described equal oily control procedure.
The oily balance of the described combined air conditioners of the embodiment of the invention, gas balancing control device realize among Fig. 2 A and Fig. 2 B that the control procedure of gas balance is as follows between first compressor 11 and second compressor 21:
When combined air conditioners of the present invention freezed, the low-pressure end of each off-premises station was communicated with, and reaches low-pressure balance automatically.When equal oil is not carried out in described combined air conditioners normal operation, 1 magnetic valve (magnetic valve of the off-premises station that priority is high) among opens solenoid valve SV2 and the magnetic valve SV7, the effect of magnetic valve SV2 and magnetic valve SV7 is release, prevents the hypertonia in the oil pipe line, produces booster.
Have priority between each off-premises station in the combined air conditioners, the priority of main off-premises station is the highest, secondly is the sub-off-premises station of running, and the priority of the sub-off-premises station of shutdown is minimum.
Relation between each off-premises station is: main off-premises station be used to realize and indoor set between communication, off-premises station and sub-off-premises station between communication.
Optimal way of the present invention, between each off-premises station priority according to the regular hour by turns once, can guarantee balanced running between each off-premises station like this, the life-span that delays compressor is good.Generally can set 12 hours priority switches once.
As long as open the compressor suction duct of the off-premises station correspondence that unlatching priority is high in the control and the magnetic valve between the oily balance tube connector 3, the high pressure in the oil pipe line is discharged in the low-pressure cavity of this compressor.
When combined air conditioners of the present invention heats, open the compressor suction duct of each off-premises station and the magnetic valve between the oily balance tube connector 3.Because when heating, the low-pressure end of each compressor is not communicated with, needs to open the magnetic valve between compressor suction duct and the oily balance tube connector 3, thereby the low-pressure end of each compressor is communicated with.The described magnetic valve that open this moment plays two effects: the low-pressure balance when realizing heating between each off-premises station, release are with preventing booster.
Referring to Fig. 3 A to Fig. 3 F, Fig. 3 A is first kind of user mode structure chart of control device second embodiment of the present invention; Fig. 3 B is second kind of user mode structure chart of control device second embodiment of the present invention; Fig. 3 C is the third user mode structure chart of control device second embodiment of the present invention; Fig. 3 D is the 4th kind of user mode structure chart of control device second embodiment of the present invention; Fig. 3 E is the 5th kind of user mode structure chart of control device second embodiment of the present invention; Fig. 3 F is the 6th kind of user mode structure chart of control device second embodiment of the present invention.
Oily balance of the present invention, relative first embodiment of gas balancing control device second embodiment have increased by the 3rd off-premises station 4.
The oily balance of the described combined air conditioners of second embodiment of the invention, gas balancing control device are used for three off-premises stations---the gentle balance of oily balance when first off-premises station 1, second off-premises station 2 and the 3rd off-premises station 4 are in parallel between first compressor 11, second compressor 21 and the 3rd compressor 41.
The described oily balance of second embodiment of the invention, gas balancing control device, comprise first oil storage tank 12 that is connected with first compressor, 11 bottoms, second oil storage tank 22 that is connected with second compressor, 21 bottoms, the 3rd oil storage tank 42 that is connected with the 3rd compressor 41 bottoms, be communicated with by magnetic valve SV1 between the first compressor exhaust pipe 11b and first oil storage tank 12, be communicated with by magnetic valve SV6 between the second compressor exhaust pipe 21b and second oil storage tank 22, be communicated with by magnetic valve SV11 between the 3rd compressor exhaust pipe 41b and the 3rd oil storage tank 42.First oil storage tank 12, second oil storage tank 22 and the 3rd oil storage tank 42 are connected by oily balance tube connector 3.First oil storage tank 12 is connected with oily balance tube connector 3 by magnetic valve SV4.Second oil storage tank 22 is connected with oily balance tube connector 3 by magnetic valve SV9.The 3rd oil storage tank 42 is connected with oily balance tube connector 3 by magnetic valve SV14.
Be connected by magnetic valve SV2 between the first compressor suction duct 11a and the oily balance tube connector 3.Be connected by magnetic valve SV7 between the second compressor suction duct 21a and the oily balance tube connector 3.Be connected by magnetic valve SV12 between the 3rd compressor suction duct 41a and the oily balance tube connector 3.
Be connected by magnetic valve SV3 between first oil storage tank 12 and the first compressor suction duct 11a, be connected by magnetic valve SV8 between second oil storage tank 22 and the second compressor suction duct 21a.Be connected by magnetic valve SV13 between the 3rd oil storage tank 42 and the 3rd compressor suction duct 41a.
The oily balance of the described combined air conditioners of the embodiment of the invention, gas balancing control device, owing to be provided with oil storage tank respectively on the pipeline that is connected in the every compressor bottom of described three outdoor unit correspondences, between described each compressor exhaust pipe and the oil storage tank magnetic valve be set and be connected; Be communicated with by oily balance tube connector 3 between per two oil storage tanks; Each oil storage tank is connected with oily balance tube connector 3 by magnetic valve; Between each compressor suction duct and the oily balance tube connector 3 magnetic valve is set and is connected, be connected by magnetic valve between each oil storage tank and the corresponding compressor suction duct.Open compressor exhaust pipe and magnetic valve between the oil storage tank by control and make that unnecessary oil flows to oil storage tank in the corresponding compressor; realize the outer all oil of this compressor body; this equal oily mode is carried out not shutting down not change under system's running frequency; the flow direction by control unlatching of magnetic valve or closing control oil and flowing reaches equal oily effect.
Operation has no effect to air-conditioning system for the oily balance of the described combined air conditioners of the embodiment of the invention, gas balancing control device, and the stability of a system is good.When certain off-premises station is shut down, carry out equal oil between the off-premises station of other operations, the off-premises station that does not move does not participate in equal oil, does not influence the oil mass in the constant pressure machine of shutdown like this.When having only an off-premises station operation, also can realize the equal oil of self.
A main oil equalizing pipe in the oil balance tube road is used the compressor suction duct of gas balance pipe and the magnetic valve pipeline between the oily balance tube connector 3, and pipeline is saved, and structure is ingenious.
System runs well, and during inequality oil, the magnetic valve between compressor suction duct and the oily balance tube connector 3 can be used as gas balance pipe usefulness, realizes the gas balance; When all oily, the magnetic valve between gas balance pipe compressor suction duct and the oily balance tube connector 3 is realized all purposes of oil as oil equalizing pipe usefulness.So all oil can be realized the gas balance again, and both unite two into one.
In addition, the magnetic valve between the gas balance pipe compressor suction duct on oil equalizing pipe road and the oily balance tube connector 3 can also play the release effect, prevents hypertonia in the oil equalizing pipe, causes booster.When non-equal oil running or all off-premises stations are all shut down; as long as open the magnetic valve between a compressor suction duct and the oily balance tube connector 3; oil equalizing pipe road and compressor are communicated with; high pressure in the oil equalizing pipe road just is discharged in the compressor by the magnetic valve path between compressor suction duct and the oily balance tube connector 3 and goes, and plays the effect that prevents booster.
For the oily balance that is illustrated more clearly in the described combined air conditioners of the embodiment of the invention, the control procedure of gas balancing control device, specify control procedure below in conjunction with Fig. 3 A to Fig. 3 F.
The implementation procedure of the oily balance of the described combined air conditioners of the embodiment of the invention, gas balancing control device oil balance is as follows:
Multi-gang air conditioner of the present invention runs well, when not carrying out all oil, magnetic valve SV3, magnetic valve SV8 and magnetic valve SV13 are held open, make low pressure for first oil storage tank 12, second oil storage tank 22 and the 3rd oil storage tank 42, be convenient to that unnecessary oil content does not flow in first oil storage tank 12, second oil storage tank 22 and the 3rd oil storage tank 42 in first compressor 11, second compressor 21 and the 3rd compressor 41.
In the time of need carrying out all oil, control the magnetic valve SV3 of first compressor 11 and the magnetic valve SV8 of second compressor 21 and the magnetic valve SV13 of the 3rd compressor 21 and close.
All oil comprises following six kinds of situations between first compressor 11, second compressor 21 and the 3rd compressor 41:
11 oil extractions of first compressor, two processes (referring to Fig. 3 A) of second compressor 21 and 41 oil suctions of the 3rd compressor.
Perhaps second compressor, 21 oil extractions, two processes (referring to Fig. 3 B) of first compressor 11 and 41 oil suctions of the 3rd compressor.
Perhaps the 3rd compressor 41 oil extractions, two processes (referring to Fig. 3 C) of first compressor 11 and 21 oil suctions of second compressor.
Situation with 3 off-premises stations shown in Fig. 3 A to Fig. 3 F is an example, and the control of each magnetic valve requires referring to table 3 during oily balance.
The control of oily each magnetic valve of equilibrium process of table 3:
As 1 oil extraction of Fig. 3 A first off-premises station, when second off- premises station 2 and 4 oil suctions of the 3rd off-premises station, the magnetic valve SV1 that control links to each other with the first compressor exhaust pipe 11b opens, a high pressure is provided for first oil storage tank 12, the magnetic valve SV4 that controls first off-premises station 1 opens, the magnetic valve SV12 of the magnetic valve SV7 of second off-premises station 2 and the 3rd off-premises station 4 opens, oil in first oil storage tank 12 of such first off-premises station 1 flows in second compressor 21 by the magnetic valve SV4 of first off-premises station 1 and the magnetic valve SV7 of second off-premises station 2 under the high pressure effect, oil in first oil storage tank 12 of first off-premises station 1 flows in the 3rd compressor 41 by the magnetic valve SV4 of first off-premises station 1 and the magnetic valve SV12 of the 3rd off-premises station 4 under the high pressure effect, thereby realized the oily balance between three compressors.
Work as 2 oil extractions of second off-premises station as Fig. 3 B, when first off-premises station 1 and 4 oil suctions of the 3rd off-premises station, the magnetic valve SV6 that control links to each other with the second compressor exhaust pipe 21b opens, a high pressure is provided for second oil storage tank 22, the magnetic valve SV9 that controls second off-premises station 2 opens, the magnetic valve SV12 of the magnetic valve SV1 of first off-premises station 1 and the 3rd off-premises station 4 opens, oil in second oil storage tank 22 of such second off-premises station 2 flows in first compressor 11 by the magnetic valve SV9 of second off-premises station 2 and the magnetic valve SV2 of first off-premises station 1 under the high pressure effect, oil in second oil storage tank 22 of second off-premises station 2 flows in the 3rd compressor 41 by the magnetic valve SV9 of second off-premises station 2 and the magnetic valve SV12 of the 3rd off-premises station 4 under the high pressure effect, thereby realized the oily balance between three compressors.
Work as 4 oil extractions of the 3rd off-premises station as Fig. 3 C, when first off-premises station 1 and 2 oil suctions of second off-premises station, the magnetic valve SV11 that control links to each other with the 3rd compressor exhaust pipe 41b opens, a high pressure is provided for the 3rd oil storage tank 42, the magnetic valve SV14 that controls the 3rd off-premises station 4 opens, the magnetic valve SV7 of the magnetic valve SV1 of first off-premises station 1 and second off-premises station 2 opens, oil in the 3rd oil storage tank 42 of such the 3rd off-premises station 4 flows in first compressor 11 by the magnetic valve SV14 of the 3rd off-premises station 4 and the magnetic valve SV2 of first off-premises station 1 under the high pressure effect, oil in the 3rd oil storage tank 42 of the 3rd off-premises station 4 under the high pressure effect magnetic valve SV14 by the 3rd off-premises station 4 and and the magnetic valve SV7 of second off-premises station 2 flow in second compressor 21, thereby realized oily balance between three compressors.
As Fig. 3 D, first off-premises station 1 and 2 oil extractions of second off-premises station, during 4 oil suctions of the 3rd off-premises station, the first magnetic valve SV1 that control links to each other with the first compressor exhaust pipe 11b opens with the magnetic valve SV6 that links to each other with the second compressor exhaust pipe 21b, a high pressure is provided for first oil storage tank 12 and second oil storage tank 22, controlling the magnetic valve SV4 of first off-premises station 1 and the magnetic valve SV9 of second off-premises station 2 opens, the magnetic valve SV12 of the 3rd off-premises station 4 opens, oil in such first oil storage tank 12 and second oil storage tank 22 passes through magnetic valve SV4 under the high pressure effect, the magnetic valve SV12 of magnetic valve SV9 and the 3rd off-premises station 4 flows in the 3rd compressor 41, thereby has realized the oily balance between three compressors.
As Fig. 3 E, first off-premises station 1 and 4 oil extractions of the 3rd off-premises station, during 2 oil suctions of second off-premises station, the magnetic valve SV1 that control links to each other with the first compressor exhaust pipe 11b opens with the magnetic valve SV11 that links to each other with the 3rd compressor exhaust pipe 41b, a high pressure is provided for first oil storage tank 12 and the 3rd oil storage tank 42, controlling the magnetic valve SV4 of first off-premises station 1 and the magnetic valve SV14 of the 3rd off-premises station 4 opens, the magnetic valve SV7 of second off-premises station 2 opens, oil in such first oil storage tank 12 and the 3rd oil storage tank 42 passes through magnetic valve SV4 under the high pressure effect, the magnetic valve SV7 of the magnetic valve SV14 and second off-premises station 2 flows in second compressor 21, thereby realized the oily balance between three compressors.
As Fig. 3 F, second off- premises station 2 and 4 oil extractions of the 3rd off-premises station, during 1 oil suction of first off-premises station, the magnetic valve SV6 that control links to each other with the second compressor exhaust pipe 21b opens with the magnetic valve SV11 that links to each other with the 3rd compressor exhaust pipe 41b, a high pressure is provided for second oil storage tank 22 and the 3rd oil storage tank 42, controlling the magnetic valve SV9 of second off-premises station 2 and the magnetic valve SV14 of the 3rd off-premises station 4 opens, the magnetic valve SV2 of first off-premises station 1 opens, oil in such second oil storage tank 22 and the 3rd oil storage tank 42 passes through magnetic valve SV9 under the high pressure effect, the magnetic valve SV2 of the magnetic valve SV14 and first off-premises station 1 flows in first compressor 11, thereby realized the oily balance between three compressors.
The control time of the oily balancing procedure correspondence of above-mentioned six kinds of situations all is the scheduled time one, and the described scheduled time one is relevant with the magnetic valve size, can be set at 1.5 minutes, 2 minutes or 3 minutes.
After the scheduled time one, oily equilibrium process finishes.Oily equilibrium process when before is 1 oil extraction of first off-premises station, during the situation of second off- premises station 2 and 4 oil suctions of the 3rd off-premises station, control the magnetic valve SV4 of first off-premises station 1 and the magnetic valve SV7 of second off-premises station 2 and the magnetic valve SV12 of the 3rd off-premises station 4 and close, control the magnetic valve SV8 of second off-premises station 2, the magnetic valve SV13 and first off-premises station, the 1 magnetic valve SV3 of the 3rd off-premises station 4 and all open.After the interval scheduled time two, repeat above-mentioned oily equilibrium process control.
Oily equilibrium process when before is 2 oil extractions of second off-premises station, during the situation of first off-premises station 1 and 4 oil suctions of the 3rd off-premises station, control the magnetic valve SV9 of second off-premises station 2 and the magnetic valve SV2 of first off-premises station 1 and the magnetic valve SV12 of the 3rd off-premises station 4 and close, control the magnetic valve SV3 of first off-premises station 1, the magnetic valve SV13 and second off-premises station, the 2 magnetic valve SV8 of the 3rd off-premises station 4 and all open.After the interval scheduled time two, repeat above-mentioned equal oily process control.
Oily equilibrium process when before is 4 oil extractions of the 3rd off-premises station, during the situation of first off-premises station 1 and 2 oil suctions of second off-premises station, control the magnetic valve SV14 of the 3rd off-premises station 4 and the magnetic valve SV2 of first off-premises station 1 and the magnetic valve SV7 of second off-premises station 2 and close, control magnetic valve SV3, first off-premises station, the 1 magnetic valve SV3 of first off-premises station 1 and the magnetic valve SV8 of second off-premises station 2 and all open.After the interval scheduled time two, repeat above-mentioned equal oily process control.
Oily equilibrium process when before is first off-premises station 1 and 2 oil extractions of second off-premises station, during the situation of the 3rd off-premises station 4 oil suctions, control the magnetic valve SV4 of first off-premises station 1 and the magnetic valve SV9 of second off-premises station 2 and the magnetic valve SV12 of the 3rd off-premises station 4 and close, control the magnetic valve SV8 of first off-premises station, 1 magnetic valve SV3, second off-premises station 2 and the magnetic valve SV13 of the 3rd off-premises station 4 and all open.After the interval scheduled time two, repeat above-mentioned oily equilibrium process control.
Oily equilibrium process when before is first off-premises station 1 and 4 oil extractions of the 3rd off-premises station, during the situation of second off-premises station, 2 oil suctions, control the magnetic valve SV4 of first off-premises station 1 and the magnetic valve SV14 of the 3rd off-premises station 4 and the magnetic valve SV7 of second off-premises station 2 and close, control the magnetic valve SV8 of first off-premises station, 1 magnetic valve SV3, second off-premises station 2 and the magnetic valve SV13 of the 3rd off-premises station 4 and all open.After the interval scheduled time two, repeat above-mentioned oily equilibrium process control.
Oily equilibrium process when before is second off- premises station 2 and 4 oil extractions of the 3rd off-premises station, during the situation of first off-premises station, 1 oil suction, control the magnetic valve SV9 of second off-premises station 2 and the magnetic valve SV14 of the 3rd off-premises station 4 and the magnetic valve SV2 of first off-premises station 1 and close, control the magnetic valve SV8 of first off-premises station, 1 magnetic valve SV3, second off-premises station 2 and the magnetic valve SV13 of the 3rd off-premises station 4 and all open.After the interval scheduled time two, repeat above-mentioned oily equilibrium process control.
The interval scheduled time two between each described equal oily control procedure.
The described scheduled time two is equal oily blanking time, and this time is relevant with the oil drain quantity of compressor, and oil drain quantity is big more, and all oil blanking time just should be short more, can be 15 minutes.The described scheduled time two can be certain occurrence in 10 to 30 minutes.
The oily balance of the described combined air conditioners of second embodiment of the invention, gas balancing control device realize among Fig. 3 A to Fig. 3 F that the control procedure of gas balance is as follows between first compressor 11, second compressor 21 and the 3rd compressor 41:
When combined air conditioners of the present invention freezed, the low-pressure end of each off-premises station was communicated with, and reaches low-pressure balance automatically.When described combined air conditioners normal operation is not carried out oily balance, 1 magnetic valve (magnetic valve of the off-premises station that priority is high) among opens solenoid valve SV2, magnetic valve SV7 and the magnetic valve SV12, the effect of magnetic valve SV2, magnetic valve SV7 and magnetic valve SV12 is release, prevent the hypertonia in the oil pipe line, produce booster.
Have priority between each off-premises station in the combined air conditioners, the priority of main off-premises station is the highest, secondly is the sub-off-premises station of running, and the priority of the sub-off-premises station of shutdown is minimum.
Relation between each off-premises station is: main off-premises station be used to realize and indoor set between communication, off-premises station and sub-off-premises station between communication.
Optimal way of the present invention, between each off-premises station priority according to the regular hour by turns once, can guarantee balanced running between each off-premises station like this, the life-span that delays the constant pressure machine is good.Generally can set 12 hours priority switches once.
As long as open the compressor suction duct of the off-premises station correspondence that unlatching priority is high in the control and the magnetic valve between the oily balance tube connector 3, the high pressure in the oil pipe line is discharged in the low-pressure cavity of this compressor.When combined air conditioners of the present invention heats, open the compressor suction duct of each off-premises station and the magnetic valve between the oily balance tube connector 3.Because when heating, the low-pressure end of each compressor is not communicated with, needs to open the magnetic valve between compressor suction duct and the oily balance tube connector 3, thereby the low-pressure end of each compressor is communicated with.The described magnetic valve that open this moment plays two effects: the low-pressure balance when realizing heating between each off-premises station, release are with preventing booster.
Referring to Fig. 4 and Fig. 5, Fig. 4 is oily balance of the present invention, gas balancing control device the 3rd example structure figure, and Fig. 5 is oily balance of the present invention, gas balancing control device the 4th example structure figure.
Oily balance of the present invention, relative first embodiment of gas balancing control device the 3rd embodiment have increased a magnetic valve between each compressor exhaust pipe and oily balance tube connector 3.Be specially magnetic valve SV5 between the first compressor exhaust pipe 11b and the oily balance tube connector 3 and the magnetic valve SV10 between the second compressor exhaust pipe 21b and the oily balance tube connector 3.
Oily balance of the present invention, relative second embodiment of gas balancing control device the 4th embodiment have increased a magnetic valve between each compressor exhaust pipe and oily balance tube connector 3.Be specially the magnetic valve SV5 between the first compressor exhaust pipe 11b and the oily balance tube connector 3, the magnetic valve SV15 between the magnetic valve SV10 between the second compressor exhaust pipe 21b and the oily balance tube connector 3, the 3rd compressor exhaust pipe 41b and the oily balance tube connector 3.
When described air-conditioning heating operation, control is in the compressor exhaust pipe and the unlatching of the magnetic valve between the oily balance tube connector 3 of the off-premises station of stopped status.
Heat when running well inequality oil; the off-premises station of running; magnetic valve between the compressor suction duct of the off-premises station that priority is high and the oily balance tube connector 3 is opened; magnetic valve between the compressor suction duct of out-of-operation off-premises station and the oily balance tube connector 3 closes; magnetic valve between out-of-operation compressor of outdoor unit high-pressure side and the oily balance tube connector is opened; like this elevated pressures of the outdoor machine system of Ting Jiing by the compressor of outdoor unit high-pressure side of shutting down and the magnetic valve between the oily balance tube connector and the off-premises station that turns round compressor suction duct and outdoor machine system that the magnetic valve between the oily balance tube connector 3 will be unloaded to operation in go, reach the effect of low-pressure balance.In addition, the magnetic valve between compressor of outdoor unit high-pressure side and the oily balance tube connector and the compressor suction duct of running off-premises station and the magnetic valve between the oily balance tube connector 3 can also play the hypertonia that prevents in the oil pipe line, produce the effect of booster.
Need to prove, magnetic valve between compressor of outdoor unit high-pressure side in the system and the oily balance tube connector is not custom-designed because of the gas balance, is the device that prevents that compressor band liquid from starting by magnetic valve between compressor of outdoor unit high-pressure side and the oily balance tube connector yet.When heating; compressor of outdoor unit high-pressure side of shutting down and the magnetic valve between the oily balance tube connector are opened; the refrigerant that leaks in this off-premises station can be extracted in the outdoor machine system of running by the compressor of outdoor unit blast pipe of unlatching and the magnetic valve between the oily balance tube connector; during the compressor start of shutting down like this; just can not be with liquid to start, prevent that effectively the phenomenon that compressor band liquid starts from taking place.
The described gas balancing control device of the embodiment of the invention, used dexterously prevent that compressor band liquid from starting magnetic valve and the effect of the compressor suction duct of oily balance oil circuit and the realization of the magnetic valve between the oily balance tube connector 3 gas balance, and design the gas balanced loop no longer separately, simple in structure.
More than a kind of multi-connection air conditioner oil balancing provided by the present invention, gas balancing control device are described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1, a kind of oily balance, gas balancing control device of combined air conditioners, the oily balance that is used at least two outdoor units compressor when in parallel, it is characterized in that described oily balance control device comprises the oil storage tank that corresponding with described many outdoor units respectively every compressor bottom is connected; Be communicated with by magnetic valve one between described each compressor exhaust pipe and the oil storage tank; Be communicated with by oily balance tube connector between per two oil storage tanks; Each oil storage tank is connected with oily balance tube connector by magnetic valve four; Be connected by magnetic valve two between each compressor suction duct and the oily balance tube connector, be connected by magnetic valve three between each oil storage tank and the corresponding compressor suction duct.
2, oily balance, the gas balancing control device of combined air conditioners according to claim 1, it is characterized in that, described off-premises station comprises off-premises station one and off-premises station two at least, when off-premises station one oil suction, off-premises station two oil extractions, equal oily control procedure comprises that the magnetic valve two of controlling off-premises station one opens the scheduled time one, the magnetic valve one of off-premises station one, magnetic valve three, magnetic valve four are closed the described scheduled time one, magnetic valve one, the magnetic valve four of control off-premises station two are opened the described scheduled time one, and the magnetic valve two of off-premises station two, magnetic valve three are closed the described scheduled time one.
3, oily balance, the gas balancing control device of combined air conditioners according to claim 1, it is characterized in that, described off-premises station comprises off-premises station one, off-premises station two and off-premises station three, when off-premises station one oil suction, off-premises station two and off-premises station three oil extractions, equal oily control procedure comprises that the magnetic valve two of controlling off-premises station one opens the scheduled time one, and the magnetic valve one of off-premises station one, magnetic valve three, magnetic valve four are closed the described scheduled time one; Control magnetic valve one, the magnetic valve four of off-premises station two simultaneously and open the described scheduled time one, the magnetic valve two of off-premises station two, magnetic valve three are closed the described scheduled time one; Control magnetic valve one, the magnetic valve four of off-premises station three simultaneously and open the described scheduled time one, the magnetic valve two of off-premises station three, magnetic valve three are closed the described scheduled time one.
According to oily balance, the gas balancing control device of claim 2 or 3 described combined air conditioners, it is characterized in that 4, the described scheduled time one is 1.5 to 3 minutes.
5, according to oily balance, the gas balancing control device of claim 2 or 3 described combined air conditioners, it is characterized in that the interval scheduled time two between each described equal oily control procedure.
6, oily balance, the gas balancing control device of combined air conditioners according to claim 5 is characterized in that, the described scheduled time two is 10 to 30 minutes.
7, oily balance, the gas balancing control device of combined air conditioners according to claim 6 is characterized in that, the described scheduled time one is 1.5 to 3 minutes.
8, oily balance, the gas balancing control device of combined air conditioners according to claim 1 is characterized in that, are connected by magnetic valve five between each compressor exhaust pipe and the oily balance tube connector.
9, oily balance, the gas balancing control device of combined air conditioners according to claim 8 is characterized in that, during described air-conditioning heating operation, control is in magnetic valve five unlatchings of the off-premises station of stopped status.
10, oily balance, the gas balancing control device of combined air conditioners according to claim 8 is characterized in that, control the gas balance that described magnetic valve five and magnetic valve two are realized described combined air conditioners.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710195434 CN101451757B (en) | 2007-11-28 | 2007-11-28 | Multi-connection air conditioner oil balancing and gas balancing control device |
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| CN 200710195434 CN101451757B (en) | 2007-11-28 | 2007-11-28 | Multi-connection air conditioner oil balancing and gas balancing control device |
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| CN101451757B CN101451757B (en) | 2013-01-02 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101988717B (en) * | 2009-08-07 | 2012-11-28 | 珠海格力电器股份有限公司 | Modularized multi-connected set and balancing control method for refrigerating machine oil of modularized multi-connected set |
| CN102865213A (en) * | 2011-07-08 | 2013-01-09 | 珠海格力电器股份有限公司 | Multiple compressor system and oil balancing method and device thereof |
| CN103697559A (en) * | 2012-09-27 | 2014-04-02 | 广东美的暖通设备有限公司 | Modular multi-split air conditioner and control method for uniformly distributing refrigerant during refrigeration thereof |
| CN106440521A (en) * | 2016-12-22 | 2017-02-22 | 广东申菱环境系统股份有限公司 | Safety oil level operation device for compressors connected in parallel |
| CN112432342A (en) * | 2020-11-23 | 2021-03-02 | 珠海格力电器股份有限公司 | Differential pressure control system and method of heat pump air conditioner and heat pump air conditioner |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3939314B2 (en) * | 2004-06-10 | 2007-07-04 | 三星電子株式会社 | Air conditioner and oil equalizing operation method thereof |
| KR100596573B1 (en) * | 2004-12-28 | 2006-07-04 | 삼성전자주식회사 | Air conditioner |
| CN200952856Y (en) * | 2006-08-02 | 2007-09-26 | 海尔集团公司 | Multiple air conditioner machine set oil balancing device |
| CN200965319Y (en) * | 2006-09-21 | 2007-10-24 | 海尔集团公司 | Oil-equalizing and cool medium balance system of multiple-linking air conditioner set |
| CN201177351Y (en) * | 2007-11-28 | 2009-01-07 | 海尔集团公司 | Multi-link air conditioner oil-balancing gas-balancing control device |
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- 2007-11-28 CN CN 200710195434 patent/CN101451757B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101988717B (en) * | 2009-08-07 | 2012-11-28 | 珠海格力电器股份有限公司 | Modularized multi-connected set and balancing control method for refrigerating machine oil of modularized multi-connected set |
| CN102865213A (en) * | 2011-07-08 | 2013-01-09 | 珠海格力电器股份有限公司 | Multiple compressor system and oil balancing method and device thereof |
| CN102865213B (en) * | 2011-07-08 | 2016-02-03 | 珠海格力电器股份有限公司 | Multi-compressor system and equal oily method and apparatus thereof |
| CN103697559A (en) * | 2012-09-27 | 2014-04-02 | 广东美的暖通设备有限公司 | Modular multi-split air conditioner and control method for uniformly distributing refrigerant during refrigeration thereof |
| CN103697559B (en) * | 2012-09-27 | 2016-04-13 | 广东美的暖通设备有限公司 | The control method of refrigerant uniform distribution when modular multi-connection and refrigeration thereof |
| CN106440521A (en) * | 2016-12-22 | 2017-02-22 | 广东申菱环境系统股份有限公司 | Safety oil level operation device for compressors connected in parallel |
| CN112432342A (en) * | 2020-11-23 | 2021-03-02 | 珠海格力电器股份有限公司 | Differential pressure control system and method of heat pump air conditioner and heat pump air conditioner |
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