CN208504810U - Return oil system and air-conditioning - Google Patents
Return oil system and air-conditioning Download PDFInfo
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- CN208504810U CN208504810U CN201820898093.8U CN201820898093U CN208504810U CN 208504810 U CN208504810 U CN 208504810U CN 201820898093 U CN201820898093 U CN 201820898093U CN 208504810 U CN208504810 U CN 208504810U
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- oil return
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- way valve
- controller
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Abstract
This application involves a kind of return oil system and air-conditionings, including condensation unit, air-cooler, the first expansion valve, first check-valve, the first oil return valve, the second oil return valve, third oil return valve, oil catcher and controller；Condensing unit includes compressor, four-way valve, condenser, liquid supply electromagnetic valve and gas-liquid separator；If controller detects that air-conditioning executes defrosting operation, be connected between conducting, the second end of four-way valve and the 4th end of four-way valve between the closing of adjusting liquid supply electromagnetic valve, the first end of four-way valve and the third end of four-way valve, the first expansion valve is closed, the unlatching of the first oil return valve, the unlatching of the second oil return valve；If detecting, air-conditioning stops executing defrosting operation and executes refrigerating operation, the first oil return valve is adjusted to open, be connected between conducting, the third end of four-way valve and the 4th end of four-way valve between the unlatching of third oil return valve, the first end of four-way valve and the second end of four-way valve, it realizes refrigeration oil and is transferred back to compressor, reduce compressor petrol starvation, reduces air-conditioning failure rate.
Description
Technical field
This application involves air-conditioning technical fields, and in particular to a kind of return oil system and air-conditioning.
Background technique
The cooling cycle system that middle-size and small-size freezer is formed using variable frequency condenser group and air-cooler, because of the limit in freezer place
System often condenses unit and air-cooler distance farther out, and connecting tube is longer, in addition temperature of ice house is lower, the viscosity of refrigeration oil is big, stream
Dynamic property is poor, will cause and stores a large amount of refrigeration oil inside air-cooler, and condensation unit is caused the case where oil starvation occur.
Oil droplet is taken back condensation by inspiratory airflow when condensation unit oil return under normal conditions is by condensation unit air-breathing
Unit, alternatively, after the refrigeration oil heating in air-cooler, reversely flowing back to freezing machine group by the way of inverted running.
But since freezer place, environment etc. limit, conventional suction oil return can not be by the refrigeration oil suction in air-cooler
Enter to condense in the compressor of unit, and farther out due to condensation unit and air-cooler distance, between connecting tube it is longer, it is conventional to switch
When four-way valve system reverse is run, the refrigeration oil in air-cooler is often merely able to the condenser migrated into condensation unit, equally
The compressor that can not be transferred back to refrigeration oil inside air-cooler in condensation unit, causes compressor oil starvation, causes air-conditioning failure.
Utility model content
To be overcome the problems, such as present in the relevant technologies at least to a certain extent, the application provides a kind of return oil system
And air-conditioning.
According to the embodiment of the present application in a first aspect, provide a kind of return oil system, including condensation unit, air-cooler,
First expansion valve, first check-valve, the first oil return valve, the second oil return valve, third oil return valve, oil catcher and controller；
The condensation unit includes compressor, four-way valve, condenser, liquid supply electromagnetic valve and gas-liquid separator；
The first end of the four-way valve is connected with the outlet end of the compressor；
The first end of first oil return valve and the input end of the condenser are connected with the second end of the four-way valve；
The first end of the third oil return valve protrudes into the oil catcher, the second end and the gas-liquid of the third oil return valve
Separator is connected；
The third end of the four-way valve is connected with the first end of the air-cooler；
4th end of the four-way valve is connected with the input end of the gas-liquid separator；The outlet end of the gas-liquid separator
It is connected with the input end of the compressor；
The outlet end of the condenser is connected with the first end of the liquid supply electromagnetic valve；
The outlet end of the second end of the liquid supply electromagnetic valve, the first end of first expansion valve and the check-valves with
The first end of second oil return valve is connected；
The second end of first oil return valve and the second end of second oil return valve are connected with the oil catcher；
The second end of first expansion valve and the input end of the check-valves are connected with the second end of the air-cooler；
It is the compressor, the four-way valve, the condenser, the liquid supply electromagnetic valve, first expansion valve, described cold
Blower, first oil return valve, second oil return valve and second oil return valve are connected with the controller；
If the controller detects that air-conditioning executes defrosting operation, the liquid supply electromagnetic valve closing, the four-way valve are adjusted
First end and the four-way valve third end between conducting, the second end of the four-way valve and the four-way valve the 4th end it
Between conducting, first expansion valve close, first oil return valve open, second oil return valve open；And it if detects
Air-conditioning stops executing defrosting operation and executes refrigerating operation, adjusting first oil return valve is opened, the third oil return valve is opened,
Conducting, the third end of the four-way valve and the four-way valve between the first end of the four-way valve and the second end of the four-way valve
The 4th end between be connected.
Further, return oil system described above further includes low pressure sensor and/or the first timer；
The low pressure sensor and first timer are connected with the controller；
The low pressure sensor is also connected with the input end of the compressor；
The first pressure value of acquisition is sent to the controller by the low pressure sensor, and first timer will obtain
First timing duration is sent to the controller；
If the controller detects that the first pressure value less than the first low-voltage variation early warning value, is closed described first time
Oil valve and second oil return valve；And/or if detecting, first timing duration reaches the first default clocking value, closes institute
State the first oil return valve and second oil return valve；And/or first oil return valve and institute are closed if receiving and stopping defrost instruction
State the second oil return valve.
Further, return oil system described above, the condensation unit further include that second check-valve and second are swollen
Swollen valve；
The outlet end of the condenser and described for liquid electromagnetic is arranged in the second check-valve and second expansion valve
On the connected circuit of the first end of valve；
Outlet end of the first end of the input end of the second check-valve and second expansion valve with the condenser
It is connected；
The outlet end of the second check-valve, second expansion valve second end with the liquid supply electromagnetic valve first
End is connected；
The second check-valve and second expansion valve are also connected with the controller respectively；
If the controller detects that the first pressure value is greater than the first low-voltage variation early warning value, and less than second
Low-voltage variation early warning value, the compressor frequency reach predeterminated frequency value, open second expansion valve and described for liquid electromagnetic
Valve.
Further, return oil system described above further includes filter；
The first end of the second check-valve, second expansion valve and the liquid supply electromagnetic valve is arranged in the filter
On the circuit of formation.
Further, return oil system described above further includes liquid storage device；
The circuit that the second check-valve, second expansion valve and the filter are formed is arranged in the liquid storage device
On.
Further, return oil system described above further includes high pressure sensor；
The outlet end of the compressor and the controller are connected with the high pressure sensor；
The second pressure value of acquisition is sent to the controller by the high pressure sensor；
If the controller detects that the first pressure value is greater than the second low-voltage variation early warning value, and described second
Pressure value opens first oil return valve and the third oil return valve less than the first high voltage protective early warning value.
Further, return oil system described above further includes the second timer and third timer；
Second timer and the third timer are connected with the control；
Second timer will obtain the second timing duration and be sent to the controller, and the third timer will obtain
Third timing duration be sent to the controller；
If the controller detects that second timing duration reaches the second default clocking value, first oil return is closed
Valve closes first oil return valve alternatively, the third timing duration reaches third and presets clocking value if detecting.
Further, return oil system described above, if the controller detects that second timing duration is small
In the second default clocking value, the third timing duration is less than third and presets clocking value, and the first pressure value reaches second
High voltage protective early warning value closes first oil return valve, and controls the second timer and stop timing.
Further, return oil system described above, the four-way valve second end and the condenser into
Between mouthful end, between the 4th end and the input end of the gas-liquid separator of the four-way valve and the gas-liquid separator goes out
Temperature sensor is provided between mouth end and the input end of the compressor；
The temperature sensor is connected with the controller.
According to the second aspect of the embodiment of the present application, a kind of air-conditioning is provided, is provided with return oil system as described above.
The return oil system and air-conditioning of the application, by setting the first oil return valve, the second oil return valve, third oil return valve,
Oil catcher, so that when air-conditioning executes defrosting operation, liquid supply electromagnetic valve closed, the third end of the first end of four-way valve and four-way valve
Between conducting between conducting, the second end of four-way valve and the 4th end of four-way valve, the first expansion valve is closed, the first oil return valve is opened
It opens, the second oil return valve is opened, the first oil return circuit of formation, so that the oil in air-cooler enters oil-collecting by the first oil return circuit
Device；When executing refrigerating operation, the first oil return valve is opened, third oil return valve is opened, the first end of four-way valve and four-way valve the
It is connected between conducting, the third end of four-way valve and the 4th end of four-way valve between two ends, so as to compressor, the first oil return valve, collection
The second oil return valve is formed between oily device, third oil return valve and gas-liquid separator, so that the oil in oil catcher is returned by the second oil return
Road enters compressor；It realizes the refrigeration oil inside air-cooler and is transferred back to compressor, reduce compressor petrol starvation, reduce
Air-conditioning failure rate.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The application can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
Fig. 1 is the structural schematic diagram of the return oil system embodiment of the application；
Fig. 2 is the flow chart of the defrost oil return of the application；
Fig. 3 is the flow chart of the oil catcher oil return of the application.
Specific embodiment
Here will the description is performed on the exemplary embodiment in detail, the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects be described in detail in claims, the application.
Fig. 1 is the structural schematic diagram of the return oil system embodiment of the application, as shown in Figure 1, the air-conditioning of the present embodiment
Oil return system may include condensation unit 10, air-cooler 11, the first expansion valve 12, first check-valve 13, the first oil return valve 14, the
Two oil return valves 15, third oil return valve 16, oil catcher 17 and controller (no longer being shown in figure).Wherein, condensation unit 10 includes pressure
Contracting machine 101, four-way valve 102, condenser 103, liquid supply electromagnetic valve 104 and gas-liquid separator 105；The first end of four-way valve 102 with
The outlet end of compressor 101 is connected；The input end of the first end of first oil return valve 14 and condenser 103 with four-way valve 102
Second end is connected；The first end of third oil return valve 16 protrudes into oil catcher 17, the second end and gas-liquid separator of third oil return valve 16
105 are connected；The third end of four-way valve 102 is connected with the first end of air-cooler 11；4th end of four-way valve 102 and gas-liquid separator
105 input end is connected；The outlet end of gas-liquid separator 105 is connected with the input end of compressor 101；The outlet of condenser 103
End is connected with the first end of liquid supply electromagnetic valve 104；The second end of liquid supply electromagnetic valve 104, the first end of the first expansion valve 12 and only
The outlet end for returning valve is connected with the first end of the second oil return valve 15；The second end of first oil return valve 14 and the second oil return valve 15
Second end is connected with oil catcher 17；The input end of the second end of first expansion valve 12 and check-valves with air-cooler 11 second
End is connected；Compressor 101, four-way valve 102, condenser 103, liquid supply electromagnetic valve 104, the first expansion valve 12, air-cooler 11,
One oil return valve 14, the second oil return valve 15 and third oil return valve 16 are connected with controller.
During a specific implementation, when controller detects that the evaporating temperature of air-cooler 11 and other parameters reach
When one logic presupposition value, it can be determined that 11 frost layer of air-cooler is blocked up out, needs defrost, and air-conditioning will enter defrost pattern, controller
Adjustable liquid supply electromagnetic valve 104 is closed, so that whole system enters the similar movement for evacuating circulation, to evacuate cold wind
Liquid in machine 11 improves subsequent defrosting operation efficiency, and air-cooler 11 keeps working condition at this time, reaches when evacuating circulation action
When the first preset time threshold (such as 20s), controller controls 102 switching channel of four-way valve, so that the first end of four-way valve 102
It is connected, and controls between conducting, the second end of four-way valve 102 and the 4th end of four-way valve 102 between the third end of four-way valve 102
Refrigeration fan 11 is shut down, and the first expansion valve 12 is closed, and the first oil return valve 14 is opened, the second oil return valve 15 is opened, and feed flow ends
Valve 23 and suction line valve 24 are in the open state, such compressor 101, four-way valve 102, suction line valve 24, air-cooler 11,
The first oil return is formed between first check-valve 13, cutoff 23, the second oil return valve 15, oil catcher 17 and the first oil return valve 14
When the gas in circuit, compressor discharge passes through air-cooler 11, air-cooler 11 executes heat exchange, so that the frost layer on its surface is melted,
Meanwhile the refrigeration oil in air-cooler 11 is executed into heating, the oil that viscosity is small, mobility is strong is obtained, so that in air-cooler 11
Oil oil catcher 17 is entered by the first oil return circuit, oil body stays in oil catcher 17, gas pass through 14 four-way of the first oil return valve
Valve 102 and gas-liquid separator 105 enter in compressor 101, complete 11 oil return of air-cooler.
After completing defrosting operation, air-conditioning can execute refrigerating operation, and controller adjusts 102 switching channel of four-way valve, makes
Obtain conducting, the third end of four-way valve 102 and four-way valve 102 between the first end of four-way valve 102 and the second end of four-way valve 102
The 4th end between be connected, and control the first oil return valve 14 open, third oil return valve 16 open, so as to compressor 101, first times
The second oil return valve 15 is formed between oil valve 14, oil catcher 17, third oil return valve 16 and gas-liquid separator 105, so that oil catcher 17
In oil compressor 101 is entered by the second oil return circuit.Specifically, the gas that compressor 101 is discharged passes through the first oil return valve
14 enter in oil catcher 17, so that the pressure in oil catcher 17 increases, the oil in oil catcher 17 passes through third oil return valve 16, enter
Gas-liquid separator 105, the oil in gas-liquid separator 105 enters back into compressor 101, to prevent compressor 101 from reducing compression
101 petrol starvation of machine avoids compressor 101 from breaking down, and reduces the failure rate of condensation unit 10.
The return oil system of the present embodiment, by the way that the first oil return valve 14, the second oil return valve 15, third oil return valve is arranged
16, oil catcher 17, so that when air-conditioning executes defrosting operation, the closing of liquid supply electromagnetic valve 104, the first end of four-way valve 102 and four
Conducting, the first expansion between conducting, the second end of four-way valve 102 and the 4th end of four-way valve 102 between the third end of port valve 102
Valve 12 is closed, the first oil return valve 14 is opened, the second oil return valve 15 is opened, and the first oil return circuit is formed, so that in air-cooler 11
Oil enters oil catcher 17 by the first oil return circuit；When executing refrigerating operation, the unlatching of the first oil return valve 14, third oil return valve
Conducting, the third end of four-way valve 102 and four-way between 16 unlatchings, the first end of four-way valve 102 and the second end of four-way valve 102
It is connected between 4th end of valve 102, so as to compressor 101, the first oil return valve 14, oil catcher 17, third oil return valve 16 and gas-liquid
The second oil return valve 15 is formed between separator 105, so that the oil in oil catcher 17 enters compressor by the second oil return circuit
101；The refrigeration oil for realizing 11 the inside of air-cooler is transferred back to compressor 101, reduces 101 petrol starvation of compressor, reduces
Air-conditioning failure rate.
In practical applications, since the refrigeration oil in air-cooler 11 is not very much, the time required for defrost is usually wanted
It is longer than the oil return time, therefore, when being completed by the first oil return valve 14 and 15 oil return of the second oil return valve, the first oil return valve 14 and second
Oil return valve 15 no longer needs to keep opening state.The return oil system of the present embodiment can be set the first timer, and by first
Timer is connected with controller, and controller is when controlling the conducting of the first oil return circuit, control the first timer of starting, the first timer
The first obtained timing duration is sent to controller, if controller detect the first timing duration reach first it is pre-designed when
Corresponding instruction can be generated in value, closes the first oil return valve 14 and the second oil return valve 15, no longer execution oil return operation.
Due to compressor 101 input end hypotony when, low-voltage variation can be triggered, influence compressor 101 normally transport
Row, therefore, as shown in Figure 1, the return oil system of the present embodiment further includes low pressure sensor 18, which divides
It is not connected with the input end of compressor 101 and controller.The first pressure value of acquisition is sent to control by low pressure sensor 18
Device, if controller detects that first pressure value less than the first low-voltage variation early warning value, generates command adapted thereto, to close the first oil return
Valve 14 and the second oil return valve 15 stop oil return.If closing the first oil return valve in addition, controller, which receives, stops defrost instruction
14 and second oil return valve 15, stop oil return.Wherein, in the present embodiment, the condition for preferably stopping oil return to three kinds simultaneously is executed
Judgement.
In practical applications, the import end pressure of compressor 101 is lower, but when the pressure value of not up to low-voltage variation, can
Oil return can be influenced, at this time, it may be necessary to frequency reducing be executed to compressor 101, as shown in Figure 1, the return oil system of the present embodiment may be used also
To include second check-valve 106 and the second expansion valve 107；Wherein, second check-valve 106 and the second expansion valve 107 are arranged cold
On the circuit that the outlet end of condenser 103 is connected with the first end of liquid supply electromagnetic valve 104；The input end of second check-valve 106 and
The first end of two expansion valves 107 is connected with the outlet end of condenser 103；The outlet end of second check-valve 106, the second expansion valve
107 second end is connected with the first end of liquid supply electromagnetic valve 104；Second check-valve 106 and the second expansion valve 107 also respectively with
Controller is connected.If controller detects that first pressure value is greater than the first low-voltage variation early warning value, and less than the second low-voltage variation
Early warning value, control compressor 101 execute ladder frequency reducing, for example, being to execute ladder frequency reducing in a stage with 5Hz.And work as compressor
101 frequencies reach predeterminated frequency value, i.e., when compressor 101 can not continue frequency reducing, controller opens the second expansion valve 107 and feed flow
Solenoid valve 104, so that compressor 101 executes ladder raising frequency, so that the import end pressure of compressor 101 is greater than the second low-voltage variation
Early warning value avoids influencing oil return.
During a specific implementation, when controller detects that the evaporating temperature of air-cooler 11 and other parameters reach
When two logic presupposition values, it can be determined that the frost layer for going out 11 surface of air-cooler has been melted, at this point it is possible to which generating defrost terminates to refer to
It enables, controller controls 102 switching channel of four-way valve, and liquid supply electromagnetic valve 104 is closed, the second expansion valve 107 is closed, and starts cold wind
Machine 11, compressor 101 start to execute frequency adjustment according to preset logic, and whole system re-enters into similar evacuates and follows
The movement of ring avoids liquid hit phenomenon to evacuate the liquid in air-cooler 11, reaches the first preset time threshold when evacuating circulation action
When being worth (such as 30s), controller controls liquid supply electromagnetic valve 104 and opens, and the first expansion valve 12 is opened, and air-conditioning enters refrigeration mode.
Fig. 2 is the flow chart of the defrost oil return of the application.
100, defrost oil return starts.
101, after reaching 20s, control liquid supply electromagnetic valve is closed.
102, four-way Vavle switching, air-cooler shutdown, the closing of the first expansion valve, the unlatching of the first oil return valve, the second oil return are controlled
Valve unlatching, the first timer initiation.
103, hot gas defrost.
104, whether the first timing duration of detection is accumulated to 75s, if so, step 111 is executed, if it is not, return step 103.
105, otherwise whether detection first pressure value is returned less than the second low-voltage variation early warning value if so, executing step 106
Return step 103.
106, compressor step frequency reducing is controlled.
107, whether detection compressor can continue frequency reducing, if so, return step 105, executes step 108 if not.
108, control liquid supply electromagnetic valve is opened, the second expansion valve is opened, compressor step raising frequency.
109, otherwise whether detection first pressure value is returned less than the first low-voltage variation early warning value if so, executing step 111
Return step 105.
110, it detects whether to receive and stops defrost instruction, if so, step 111 is executed, if it is not, return step 103.
111, the first oil return valve and the second oil return valve are closed.
112, whether at defrost END instruction, if so, step 113 is executed, if it is not, return step 103.
113, four-way Vavle switching is controlled, liquid supply electromagnetic valve is closed, the second expansion valve is closed, the booting of cold wind blower, compressor
Frequency logic adjustment.
114, it after reaching 30s, controls liquid supply electromagnetic valve and the first expansion valve starts.
115, hot gas defrost terminates.
When air-conditioning stops defrosting operation, and executes refrigerating operation, control the second oil return circuit conducting can star, so as to
Oil in oil catcher 17 is transferred back to compressor 101.Specifically, as shown in Figure 1, the return oil system of the present embodiment further includes
High pressure sensor 19.The outlet end of compressor 101 and controller are connected with high pressure sensor 19；High pressure sensor 19 will acquire
Second pressure value be sent to controller.If controller detects that first pressure value is greater than the second low-voltage variation early warning value, and the
Two pressure values then may determine that system is in pressure normal condition, at this point it is possible to send phase less than the first high voltage protective early warning value
Instruction is closed, the first oil return valve 14 and third oil return valve 16 are opened, so that compressor 101, the first oil return valve 14, oil catcher 17, the
Three oil return valves 16 and gas-liquid separator 105 form the second oil return circuit.For example, using 5s as a cycle, it is high in continuous 5 periods
Pressure sensor 19 and low pressure sensor 18 are in pressure normal condition, can open the first oil return valve 14 and third oil return.
Since the oil return time is less than air-conditioner operation time, it is returned by the first oil return valve 14 and third oil return valve 16
When oil is completed, the first oil return valve 14 and third oil return valve 16 no longer need to keep opening state.The second meter can be set in the present embodiment
When device and third timer；Wherein, the second timer and third timer are connected with control；Second timer will obtain second
Timing duration is sent to controller, and obtained third timing duration is sent to controller by third timer；If controller detects
Reach the second default clocking value to the second timing duration, the first oil return valve 14 is closed, alternatively, third timing duration reaches if detecting
Clocking value is preset to third, closes the first oil return valve 14.
In the present embodiment, oil return circuit is formed due to increasing three oil return valves and oil catcher 17, so that compressor 101
Input end can be connected with the outlet end of compressor 101 by oil return circuit, if the pressure of the input end of compressor 101 is higher,
It will affect refrigeration, therefore, if controller detects the second timing duration less than the second default clocking value, third timing duration is less than
Third presets clocking value, and the first pressure value of low pressure sensor 18 reaches the second high voltage protective early warning value, closes the first oil return
Valve 14, and control the second timer and stop timing.
For example, controller closes the first oil return solenoid valve if the second timing duration reaches 90s, stop oil return, oil return mode
Terminate.If the second timing duration is not up to 90s, judge whether third timing duration reaches 5min, if reaching, system is closed
First oil return solenoid valve, stops oil return, and oil return mode terminates；If not up to, judging whether first pressure value reaches the second high pressure
Early warning value is protected, if not up to, the second timer continues timing；If having reached, the first oil return solenoid valve is closed, is controlled simultaneously
Second timer stops timing.
Fig. 3 is the flow chart of the oil catcher oil return of the application.
200, oil catcher oil return starts.
201, air-conditioning is made into refrigeration.
202, it detects in continuous 5 periods, whether high pressure sensor and low pressure sensor are normal, if so, executing step
203, otherwise, return step 201.
203, it controls the first oil return valve and third oil return valve is opened, starts the second timer and third timer, execute step
Rapid 204 and step 206.
204, whether the second timing duration is accumulated to 90s, if so, step 207 is executed, if it is not, executing step 205.
205, whether third timing duration is accumulated to 5min, if executing step 207, if it is not, executing step 206.
206, whether detection first pressure value is greater than the second high voltage protective early warning value, if step 207 is executed, if it is not, holding
Row return step 203.
207, the first oil return valve is closed, the second timer of control stops timing, executes step 205.
208, oil catcher oil return terminates.
The return oil system of the present embodiment cleverly utilizes the special efficacy of hot gas defrost, it is not necessary to specially design matched time
Oily program, and reduce the condensation original oil return program initiation culture of unit 10 or even not or else specific enablings oil return program, effectively increasing
Add the normal operating condition of unit time to account for not, improves condensation 10 whole efficiency of unit.
During a specific implementation, as shown in Figure 1, the return oil system of the present embodiment further includes filter 20；
The circuit that the first end of second check-valve 106, the second expansion valve 107 and liquid supply electromagnetic valve 104 is formed is arranged in the filter 20
On, to execute dry filter to the gas for flowing into air-cooler 11.In addition, as shown in Figure 1, the return oil system of the present embodiment also
Including liquid storage device 21；The circuit that second check-valve 106, the second expansion valve 107 and filter 20 are formed is arranged in the liquid storage device 21
On, to be stored to from the liquid of the second expansion outflow.
In the present embodiment, between the second end of four-way valve 102 and the input end of condenser 103, four-way valve 102 the 4th
Between end and the input end of gas-liquid separator 105 and between the outlet end of gas-liquid separator 105 and the input end of compressor 101
It is provided with temperature sensor 22；Temperature sensor 22 is connected with controller, so as to controller real-time monitoring and 101 phase of compressor
The temperature value in each circuit even, is adjusted compressor 101.
The application also provides a kind of air-conditioning, and the return oil system of above-described embodiment is provided in the air-conditioning.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments
Unspecified content may refer to the same or similar content in other embodiments.
It should be noted that term " first ", " second " etc. are used for description purposes only in the description of the present application, without
It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present application, unless otherwise indicated, the meaning of " multiple "
Refer at least two.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the application.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although embodiments herein has been shown and described above, it is to be understood that above-described embodiment is example
Property, it should not be understood as the limitation to the application, those skilled in the art within the scope of application can be to above-mentioned
Embodiment executes change, modification, replacement and modification.
Claims (10)
1. a kind of return oil system, which is characterized in that including condensation unit, air-cooler, the first expansion valve, first check-valve,
First oil return valve, the second oil return valve, third oil return valve, oil catcher and controller；
The condensation unit includes compressor, four-way valve, condenser, liquid supply electromagnetic valve and gas-liquid separator；
The first end of the four-way valve is connected with the outlet end of the compressor；
The first end of first oil return valve and the input end of the condenser are connected with the second end of the four-way valve；
The first end of the third oil return valve protrudes into the oil catcher, the second end and the gas-liquid separation of the third oil return valve
Device is connected；
The third end of the four-way valve is connected with the first end of the air-cooler；
4th end of the four-way valve is connected with the input end of the gas-liquid separator；The outlet end of the gas-liquid separator and institute
The input end for stating compressor is connected；
The outlet end of the condenser is connected with the first end of the liquid supply electromagnetic valve；
The outlet end of the second end of the liquid supply electromagnetic valve, the first end of first expansion valve and the check-valves with it is described
The first end of second oil return valve is connected；
The second end of first oil return valve and the second end of second oil return valve are connected with the oil catcher；
The second end of first expansion valve and the input end of the check-valves are connected with the second end of the air-cooler；
The compressor, the four-way valve, the condenser, the liquid supply electromagnetic valve, first expansion valve, the cold wind
Machine, first oil return valve, second oil return valve and second oil return valve are connected with the controller；
If the controller detects that air-conditioning executes defrosting operation, adjust the liquid supply electromagnetic valve close, the four-way valve the
It is led between conducting, the second end of the four-way valve and the 4th end of the four-way valve between one end and the third end of the four-way valve
Logical, described first expansion valve is closed, first oil return valve is opened, second oil return valve is opened；And if detect air-conditioning
Stop executing defrosting operation and execute refrigerating operation, adjusts the first oil return valve unlatching, the third oil return valve is opened, is described
Conducting between the first end of four-way valve and the second end of the four-way valve, the third end of the four-way valve and the four-way valve the
It is connected between four ends.
2. return oil system according to claim 1, which is characterized in that further include low pressure sensor and/or the first meter
When device；
The low pressure sensor and first timer are connected with the controller；
The low pressure sensor is also connected with the input end of the compressor；
The first pressure value of acquisition is sent to the controller by the low pressure sensor, and first timer will obtain first
Timing duration is sent to the controller；
If the controller detects that the first pressure value less than the first low-voltage variation early warning value, closes first oil return valve
With second oil return valve；And/or if detecting, first timing duration reaches the first default clocking value, closes described the
One oil return valve and second oil return valve；And/or first oil return valve and described the are closed if receiving and stopping defrost instruction
Two oil return valves.
3. return oil system according to claim 2, which is characterized in that the condensation unit further includes second check-valve
With the second expansion valve；
The second check-valve and second expansion valve be arranged in the condenser outlet end and the liquid supply electromagnetic valve
On the connected circuit of first end；
The first end of the input end of the second check-valve and second expansion valve is connected with the outlet end of the condenser；
The outlet end of the second check-valve, second expansion valve second end with the first end phase of the liquid supply electromagnetic valve
Even；
The second check-valve and second expansion valve are also connected with the controller respectively；
If the controller detects that the first pressure value is greater than the first low-voltage variation early warning value, and less than the second low pressure
Early warning value is protected, the compressor frequency reaches predeterminated frequency value, opens second expansion valve and the liquid supply electromagnetic valve.
4. return oil system according to claim 3, which is characterized in that further include filter；
The first end that the second check-valve, second expansion valve and the liquid supply electromagnetic valve is arranged in the filter is formed
Circuit on.
5. return oil system according to claim 4, which is characterized in that further include liquid storage device；
The liquid storage device is arranged on the circuit that the second check-valve, second expansion valve and the filter are formed.
6. return oil system according to claim 3, which is characterized in that further include high pressure sensor；
The outlet end of the compressor and the controller are connected with the high pressure sensor；
The second pressure value of acquisition is sent to the controller by the high pressure sensor；
If the controller detects that the first pressure value is greater than the second low-voltage variation early warning value, and the second pressure
Value opens first oil return valve and the third oil return valve less than the first high voltage protective early warning value.
7. return oil system according to claim 6, which is characterized in that further include the second timer and third timing
Device；
Second timer and the third timer are connected with the control；
Second timer will obtain the second timing duration and be sent to the controller, the third timer will obtain
Three timing durations are sent to the controller；
If the controller detects that second timing duration reaches the second default clocking value, first oil return valve is closed,
Alternatively, if detecting, the third timing duration reaches third and presets clocking value, closes first oil return valve.
8. return oil system according to claim 7, which is characterized in that if the controller detects second meter
Less than the second default clocking value, the third timing duration is less than third and presets clocking value, and the first pressure value Shi Shichang
The second high voltage protective early warning value is reached, first oil return valve is closed, and controls the second timer and stops timing.
9. return oil system according to claim 1-8, which is characterized in that in the second end of the four-way valve
Between the input end of the condenser, between the 4th end and the input end of the gas-liquid separator of the four-way valve and institute
It states and is provided with temperature sensor between the outlet end of gas-liquid separator and the input end of the compressor；
The temperature sensor is connected with the controller.
10. a kind of air-conditioning, which is characterized in that be arranged just like the described in any item return oil systems of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820898093.8U CN208504810U (en) | 2018-06-11 | 2018-06-11 | Return oil system and air-conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820898093.8U CN208504810U (en) | 2018-06-11 | 2018-06-11 | Return oil system and air-conditioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208504810U true CN208504810U (en) | 2019-02-15 |
Family
ID=65289039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820898093.8U Withdrawn - After Issue CN208504810U (en) | 2018-06-11 | 2018-06-11 | Return oil system and air-conditioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208504810U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662816A (en) * | 2018-06-11 | 2018-10-16 | 珠海格力电器股份有限公司 | Return oil system and air-conditioning |
| CN111811112A (en) * | 2020-07-13 | 2020-10-23 | 南京天加环境科技有限公司 | Intelligent oil return multi-split air conditioner system |
-
2018
- 2018-06-11 CN CN201820898093.8U patent/CN208504810U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662816A (en) * | 2018-06-11 | 2018-10-16 | 珠海格力电器股份有限公司 | Return oil system and air-conditioning |
| CN108662816B (en) * | 2018-06-11 | 2023-10-13 | 珠海格力电器股份有限公司 | Air conditioner oil return system and air conditioner |
| CN111811112A (en) * | 2020-07-13 | 2020-10-23 | 南京天加环境科技有限公司 | Intelligent oil return multi-split air conditioner system |
| CN111811112B (en) * | 2020-07-13 | 2021-11-16 | 南京天加环境科技有限公司 | Intelligent oil return multi-split air conditioner system |
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