CN206943073U - Air conditioning equipment and cold oil system thereof - Google Patents
Air conditioning equipment and cold oil system thereof Download PDFInfo
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- CN206943073U CN206943073U CN201720709772.1U CN201720709772U CN206943073U CN 206943073 U CN206943073 U CN 206943073U CN 201720709772 U CN201720709772 U CN 201720709772U CN 206943073 U CN206943073 U CN 206943073U
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 239000003921 oil Substances 0.000 claims description 292
- 239000010687 lubricating oil Substances 0.000 claims description 53
- 238000001816 cooling Methods 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 17
- 239000000306 component Substances 0.000 description 34
- 239000003507 refrigerant Substances 0.000 description 25
- 230000000903 blocking effect Effects 0.000 description 13
- 239000012535 impurity Substances 0.000 description 13
- 239000002245 particle Substances 0.000 description 9
- 230000007423 decrease Effects 0.000 description 6
- 230000008520 organization Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- 241001347978 Major minor Species 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model provides a cold oil system, which comprises a compressor, a motor, a condenser, a pipeline component, a main heat exchanger and at least one auxiliary heat exchange component; the auxiliary heat exchange assembly comprises an auxiliary heat exchanger, an auxiliary oil pipe and an auxiliary liquid pipe, the auxiliary oil pipe and the auxiliary liquid pipe are both arranged through the auxiliary heat exchanger, and both ends of the auxiliary oil pipe are both communicated with both ends of the connecting pipe; one end of the auxiliary liquid pipe is communicated with the motor, the other end of the auxiliary liquid pipe is communicated with the condenser, and the main heat exchanger and at least one auxiliary heat exchanger are arranged in parallel. The cold oil system is ensured to have sufficient heat exchange effect, the phenomenon that the pressure loss of the main heat exchanger is increased can be improved, the risk caused by bad conditions such as blockage is reduced, and the fault tolerance of the cold oil system is improved; the oil supply temperature can be cooled down under the limit working condition, the cooling capacity under the limit working condition is improved, and the reliability of the operation of the compressor in a larger working condition range is ensured. The utility model also provides an air conditioning equipment.
Description
Technical field
Air conditioner technical field is the utility model is related to, more particularly to a kind of air-conditioning equipment and its cold oil system.
Background technology
, typically all can be by oil cooler (plate type heat exchanger) by oil temperature control in centrifugal compressor lubricating oil cooling system
Within the specific limits, the effect of plate type heat exchanger is exactly the heat exchange for realizing refrigerant and lubricating oil to system, so as to take away lubricating oil
Heat, reduce oil temperature.Generally, the oil cooling system of centrifuge is exchanged heat using a plate type heat exchanger, system
Under most of operating mode, and during plate type heat exchanger normal work, preferably oil temperature can be controlled.Metal corrugated plate
It is the core component of plate type heat exchanger, they are stacked by way of welding, and refrigerant is with lubricating oil respectively at them
Convection current in the corrugated channel of composition, realize heat exchange.
But due to runner gap very little in plate type heat exchanger, if existed in the lubricating oil to come from oil pump larger
Granule foreign, the blocking of portion of runner can be caused.On the one hand, blocking can reduce heat transfer effect, when exchange capability of heat drops to one
After determining degree, lubricating oil cannot cool down, it will cause centrifuge operationally to protect and stop because oil temperature supplying is too high
Machine.On the other hand, the blocking of runner can increase the pressure drop of plate type heat exchanger, and when pressure drop increases to a certain extent, charge oil pressure drops
It is low to below safety value, it will cause centrifuge to protect shutdown because charge oil pressure is too low.Moreover, centrifuge is in peak load etc.
When being run under some limiting conditions, some in compressor need the part of oil lubrication to be in high load operation environment, part
Temperature is generally higher, therefore oil temperature is also higher, it is necessary to more cool down.To sum up, due to the heat-energy transducer of single plate type heat exchanger
Power is limited, bad to the cooling effect of lubricating oil, also results in and protects shutdown because oil temperature supplying is too high.At plate type heat exchanger
Blocked or during limiting condition state in rising, single plate type heat exchanger cooling effect difference be present or charge oil pressure is too low asks
Topic, causes centrifugal compressor to be shut down, and influences the reliability of centrifugal compressor work.
Utility model content
Based on this, it is necessary to for current single plate type heat exchanger cooling effect caused by blocking or limiting condition it is poor,
The problem of charge oil pressure is low, there is provided it is a kind of can be blocked in heat exchanger or limiting condition under ensure heat transfer effect and charge oil pressure
Cold oil system, while a kind of air-conditioning equipment containing above-mentioned cold oil system is also provided.
Above-mentioned purpose is achieved through the following technical solutions：
A kind of cold oil system, including compressor, motor, condenser, pipeline assembly, main heat exchanger and at least one auxiliary are changed
Hot component；
The pipeline assembly includes main oil pipe, main hydraulic pipe and connecting tube, and the main oil pipe wears institute with the main hydraulic pipe
Main heat exchanger is stated, and the both ends of the connecting tube connect with the main oil pipe, the compressor is arranged in the connecting tube；
One end of the main hydraulic pipe connects with the motor, and the other end of the main hydraulic pipe connects with the condenser；
The auxiliary heat-exchanging component includes auxiliary heat exchanger, auxiliary oil pipe and auxiliary liquid pipe, and the auxiliary oil pipe and the auxiliary liquid pipe are equal
The auxiliary heat exchanger is worn, and both ends of the both ends of the auxiliary oil pipe with the connecting tube connect；
One end of the auxiliary liquid pipe connects with the motor, and the other end of the auxiliary liquid pipe connects with the condenser, makes
The main heat exchanger is arranged in parallel with least one auxiliary heat exchanger.
In one of the embodiments, the auxiliary heat-exchanging component also includes the first valve, and first valve is arranged at
On the auxiliary oil pipe between the compressor and the auxiliary heat exchanger.
In one of the embodiments, the cold oil system also includes temperature sensor, and the temperature sensor is arranged at
The oil inlet end of the compressor, and electrically connected with first valve；
The temperature sensor can detect the actual oil temperature supplying of the lubricating oil.
In one of the embodiments, the cold oil system also includes pressure sensor, and the pressure sensor is arranged at
The oil inlet end of the compressor, and electrically connected with first valve；
The pressure sensor can detect the actual charge oil pressure of the lubricating oil.
In one of the embodiments, the auxiliary heat-exchanging component also includes the second valve, and second valve is arranged at
In the auxiliary liquid pipe between the condenser and the auxiliary heat exchanger, and second valve links with first valve.
In one of the embodiments, the cold oil system also includes oil pump, and the oil pump is arranged in the connecting tube,
And positioned at the oil outlet end of the compressor.
In one of the embodiments, the pipeline assembly also includes isocon, and the isocon is arranged at the connection
The end of pipe, and connected respectively with the main oil pipe and the auxiliary oil pipe positioned at the oil outlet end of the compressor, the isocon.
In one of the embodiments, the quantity of the auxiliary heat-exchanging component is one, the auxiliary heat exchanger and the master
Heat exchanger is arranged in parallel, and the both ends of the both ends of the auxiliary oil pipe respectively with the connecting tube connect, and is passed through the auxiliary liquid pipe and is distinguished
Connected with the motor and the condenser.
In one of the embodiments, the quantity of the auxiliary heat-exchanging component is at least two, and at least two described auxiliary change
Hot device is arranged in parallel, and is arranged in parallel with the main heat exchanger, the auxiliary oil pipe of at least two auxiliary heat-exchanging components
Both ends of the both ends respectively with the connecting tube connect, and the both ends of the auxiliary liquid pipe connect with the motor and the condenser respectively
It is logical.
Further relate to a kind of air-conditioning equipment, including the cold oil system as described in above-mentioned technical characteristic.
After adopting the above technical scheme, the beneficial effects of the utility model are：
Air-conditioning equipment and its cold oil system of the present utility model, main heat exchanger are set with least one auxiliary heat-exchanging modules in parallel
Put, i.e., main heat exchanger is arranged in parallel with least one auxiliary heat exchanger, and so, the flow direction of lubricating oil and refrigerant is：Lubrication
Oil enters main heat exchanger from compressor through main oil pipe, sends out and is returned in compressor after main heat exchanger heat exchange；Lubricating oil is from pressure
Enter auxiliary heat exchanger through connecting tube and auxiliary oil pipe in contracting machine, returned to after the heat exchange of auxiliary heat exchanger into connecting tube in compressor；System
Cryogen is entering main heat exchanger from condenser through main hydraulic pipe, is flowed out after being exchanged heat in main heat exchanger from main hydraulic pipe and motor is entered
Row cooling；Refrigerant flows out from condenser also enters auxiliary heat exchanger through auxiliary liquid pipe, enters after the heat exchange of auxiliary heat exchanger in motor；
When the part of main heat exchanger flows to blocking, refrigerant can also be exchanged heat with lubricating oil by least one auxiliary heat exchanger, be had
Effect solves the problems, such as that single plate type heat exchanger cooling effect caused by blocking or limiting condition is poor at present, charge oil pressure is low；
Ensure that cold oil system has enough heat transfer effects, moreover it is possible to improve the phenomenon of main heat exchanger crushing increase, reduce blocking etc. no
The risk that good situation is brought, improve the fault-tolerance of cold oil system；Meanwhile cold oil system using main heat exchanger with it is at least one auxiliary
Heat exchanger is arranged in parallel, it can also be ensured that oil temperature supplying can cool down under limiting condition, lift the cooling under limiting condition
Ability, ensure reliability of operation of the compressor in larger condition range, and then ensure air-conditioning system reliability service.
Brief description of the drawings
Fig. 1 is the organization plan figure of the cold oil system of the embodiment of the utility model one；
Fig. 2 is the organization plan figure of the cold oil system of another embodiment of the utility model；
Fig. 3 is the organization plan figure of the cold oil system of the utility model another embodiment；
Wherein：
100- cold oil systems；
110- compressors；
120- motors；
130- condensers；
140- main heat exchangers；
150- pipeline assemblies；
151- main oil pipes；
152- main hydraulic pipes；
153- connecting tubes；
154- isocons；
160- auxiliary heat-exchanging components；
The auxiliary heat exchangers of 161-；
The auxiliary oil pipes of 162-；
The auxiliary liquid pipes of 163-；
The valves of 164- first；
The valves of 165- second；
170- temperature sensors；
180- pressure sensors；
190- oil pumps.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, by the following examples, and tie
Accompanying drawing is closed, air-conditioning equipment of the present utility model and its cold oil system are further elaborated.It should be appreciated that this place is retouched
The specific embodiment stated only to explain the utility model, is not used to limit the utility model.
Referring to Fig. 1 to Fig. 3, Fig. 1 is the organization plan figure of the cold oil system 100 of the embodiment of the utility model one, and Fig. 2 is this
The organization plan figure of the cold oil system 100 of another embodiment of utility model, Fig. 3 are the cold oil system of the utility model another embodiment
The organization plan figure of system 100.The utility model provides a kind of cold oil system 100, and the cold oil system 100 is used for air-conditioning equipment
In, realize refrigeration and heat-production functions.Certainly, cold oil system 100 of the present utility model can be additionally used in other kinds of heat transmission equipment.
Cold oil system 100 of the present utility model can effectively solve current single plate type heat exchanger caused by blocking or limiting condition
The problem of cooling effect is poor, charge oil pressure is low；Ensure that cold oil system 100 has enough heat transfer effects, moreover it is possible to improve main heat exchange
The phenomenon of the crushing of device 140 increase, the risk that the undesirable conditions such as blocking are brought is reduced, improve the fault-tolerance of cold oil system 100；
At the same time it can also be ensured that oil temperature supplying can cool down under limiting condition, the cooling capacity under limiting condition is lifted, ensures pressure
Reliability of operation of the contracting machine 110 in larger condition range, and then ensure air-conditioning system reliability service.
Referring to Fig. 1 and Fig. 3, in the utility model, cold oil system 100 includes compressor 110, motor 120, condenser
130th, pipeline assembly 150, main heat exchanger 140 and at least one auxiliary heat-exchanging component 160.Motor 120 is electrically connected with compressor 110
Connect, to control the operating of compressor 110.Main heat exchanger 140 is the main parts size for realizing the heat exchange of cold oil system 100,
Auxiliary heat-exchanging component 160 is used for aiding in main heat exchanger 140 to exchange heat.Auxiliary heat-exchanging component 160 is arranged in parallel with main heat exchanger 140,
Cold oil system 100 is become to the form of multiple subsystem concurrent workings, such refrigerant can have respectively entered with lubricating oil
Exchanged heat in main heat exchanger 140 and auxiliary heat-exchanging component 160, it is ensured that still there are enough heat exchange when portion of runner blocks
Effect, while the phenomenon of the crushing of main heat exchanger 140 increase can also be improved, the risk that the situations such as blocking are brought is reduced, is improved
The fault-tolerance of system, while can also ensure that the oil temperature supplying of compressor 110 under limiting condition can cool down, lift pole
The refrigerating capacity under operating mode is limited, ensure that operational reliability of the compressor 110 in larger condition range.
Specifically, pipeline assembly 150 includes main oil pipe 151, main hydraulic pipe 152 and connecting tube 153, main oil pipe 151 and main liquid
Pipe 152 wears main heat exchanger 140, and the both ends of connecting tube 153 connect with main oil pipe 151, and compressor 110 is arranged at connecting tube
On 153.Connecting tube 153 forms loop with main oil pipe 151.One end of main oil pipe 151 connects with motor 120, main oil pipe 151 it is another
One end connects with condenser 130.Auxiliary heat-exchanging component 160 includes auxiliary heat exchanger 161, auxiliary oil pipe 162 and auxiliary liquid pipe 163, auxiliary oil
Pipe 162 wears auxiliary heat exchanger 161 with auxiliary liquid pipe 163, and the both ends of auxiliary oil pipe 162 connect with the both ends of connecting tube, auxiliary liquid pipe
163 one end connects with motor 120, and the other end of auxiliary liquid pipe 163 connects with condenser 130, makes main heat exchanger 140 and at least one
Individual auxiliary heat exchanger 161 is arranged in parallel.
Cold oil system 100 at work, by the output end of compressor 110 send out to enter through connecting tube 153 and lead by lubricating oil
In oil pipe 151, then enter through main oil pipe 151 in main heat exchanger 140 and enter through auxiliary oil pipe 162 in auxiliary heat exchanger 161, changed by master
The lubricating oil that hot device 140 cools down flows out main heat exchanger 140 by main oil pipe 151 again and is back to compressor 110 through connecting tube 153
In, the lubricating oil cooled down by auxiliary heat exchanger 161 flows out auxiliary heat exchanger 161 by auxiliary oil pipe 162 again and is back to through connecting tube 153
In compressor 110；Refrigerant enters main heat exchanger 140 and auxiliary liquid pipe by main hydraulic pipe 152 respectively after being cooled down by condenser 130
163 enter in auxiliary heat exchanger 161, and the refrigerant after heat absorption flows out main heat exchanger 140 and auxiliary liquid pipe by main hydraulic pipe 152 respectively again
The 163 auxiliary heat exchangers 161 of outflow, and enter in the motor 120 that control compressor 110 is run, to reduce motor in running
120 temperature, ensure the reliability that motor 120 works.
It should be noted that when the quantity of auxiliary heat-exchanging component 160 is at least two, auxiliary heat-exchanging component 160 also wraps
Include spoke oil inlet pipe and spoke oil outlet pipe, the end of spoke oil inlet pipe and spoke oil outlet pipe connects with the both ends of connecting tube 153, and at least two is auxiliary
Oil-feed one end of the auxiliary oil pipe 162 of heat-exchanging component 160 is helped to be connected respectively on spoke oil inlet pipe, at least two auxiliary heat-exchanging component
Fuel-displaced one end of 160 auxiliary oil pipe 162 is connected respectively in spoke oil outlet pipe.Lubricating oil enters spoke oil inlet pipe from connecting tube 153
In, then entered in auxiliary heat exchanger 161 exchanged heat by the auxiliary oil pipe 162 of at least two auxiliary heat-exchanging components 160 respectively, change
Enter after heat through auxiliary oil pipe 162 in spoke oil outlet pipe, and then be back in compressor 110.Similarly, auxiliary heat-exchanging component 160 also wraps
Auxiliary liquid inlet pipe and auxiliary liquid outlet pipe are included, the end of auxiliary liquid inlet pipe connects with condenser 130, and end and the motor 120 of auxiliary liquid outlet pipe connect
Logical, feed liquor one end of the auxiliary liquid pipe 163 of at least two auxiliary heat-exchanging components 160 is connected respectively on auxiliary liquid inlet pipe, and at least two
The liquid one end that goes out of the auxiliary liquid pipe 163 of auxiliary heat-exchanging component 160 is connected respectively in auxiliary liquid outlet pipe.Refrigerant enters from condenser 130
Enter into spoke liquid inlet pipe, then auxiliary heat exchanger 161 is entered by the auxiliary liquid pipe 163 of at least two auxiliary heat-exchanging components 160 respectively
In exchanged heat, enter after heat exchange through auxiliary liquid pipe 163 in spoke liquid outlet pipe, and then enter in motor 110.Now, the first valve
164 can be arranged on auxiliary oil pipe 162, may also be arranged on spoke oil inlet pipe；Accordingly, the second valve 165 can be arranged on auxiliary
In liquid pipe 163, it may also be arranged on auxiliary liquid inlet pipe.
It is preferred that main oil pipe 151 includes main oil inlet pipe and main oil outlet, auxiliary oil pipe 162 includes auxiliary oil inlet pipe and auxiliary fuel-displaced
Pipe, main hydraulic pipe 152 include main feed tube and main drain pipe, and auxiliary liquid pipe 163 includes auxiliary feed tube and auxiliary drain pipe.From compressor
The lubricating oil that 110 output end is sent out enters in main heat exchanger 140 through main oil inlet pipe and enters auxiliary heat exchange through auxiliary oil inlet pipe
In device 161, main heat exchanger 140 is flowed out through main oil outlet by the lubricating oil that main heat exchanger 140 cools down, cooled down by auxiliary heat exchanger 161
Lubricating oil flow out auxiliary heat exchanger 161 through auxiliary flowline, and be back in compressor 110.The refrigerant warp that condenser 130 is sent out
Main feed tube enters in main heat exchanger 140 and entered through auxiliary feed tube in auxiliary heat exchanger 161, and the refrigerant after heat absorption is gone out by master
Liquid pipe flows out main heat exchanger 140 and auxiliary drain pipe flows out auxiliary heat exchanger 161.Moreover, in the present embodiment, main heat exchanger 140 with it is auxiliary
Heat exchanger 161 refers both to plate type heat exchanger；Certainly, in other embodiment of the present utility model, main heat exchanger 140 and auxiliary heat exchanger
161 can also be other kinds of heat exchanger.
Cold oil system 100 of the present utility model is changed by being arranged in parallel at least one auxiliary at the both ends of main heat exchanger 140
Hot component 160 so that main heat exchanger 140 is arranged in parallel with least one auxiliary heat exchanger 161, and such refrigerant can with lubricating oil
Have respectively entered in main heat exchanger 140 and auxiliary heat exchanger 161 and exchanged heat so that cold oil system 100 becomes multiple subsystems
The form of concurrent working, it is effective solve single plate type heat exchanger cooling effect caused by blocking or limiting condition at present it is poor,
The problem of charge oil pressure is low；It can ensure still there are enough heat transfer effects when portion of runner blocks, while master can also be improved
The phenomenon of the crushing of heat exchanger 140 increase, the risk that the situations such as blocking are brought is reduced, improve the fault-tolerance of system, also simultaneously
The oil temperature supplying of compressor 110 under limiting condition, which can be ensured, to cool down, and lift the refrigerating capacity under limiting condition, be protected
Operational reliability of the compressor 110 in larger condition range has been demonstrate,proved, and then has ensured air-conditioning system normal operation.Referring to Fig. 1,
In an embodiment of the present utility model, the quantity of auxiliary heat-exchanging component 160 is one, and auxiliary heat exchanger 161 and main heat exchanger 140 are simultaneously
Connection is set, and the both ends of auxiliary heat exchanger 161 are connected by auxiliary oil pipe 162 with main oil pipe 151, pass through auxiliary liquid pipe 163 and main hydraulic pipe 152
Both ends connection., the such energy in parallel with main heat exchanger 140 by an auxiliary heat exchanger 161 of auxiliary heat-exchanging component 160 1
Enough ensure that rise in parallel with auxiliary heat exchanger 161 of main heat exchanger 140 is opened while carry out cooling work, improve the fault-tolerant of cold oil system 100
Property and reliability, ensure the normal operation of compressor 110.
Further, cold oil system 100 also includes oil pump 190, and oil pump 190 is arranged in connecting tube 153, and positioned at compression
The oil outlet end of machine 110.Oil pump 190 is the pressure for increasing the lubricating oil sent out from compressor 110 so that lubricating oil holds
Easily enter in main heat exchanger 140 and auxiliary heat exchanger 161 and exchanged heat, ensure the output of lubricating oil, improve compressor 110 and run
Reliability, and then ensure the heat transfer effect of cold oil system 100.Moreover, pipeline assembly 150 also includes isocon 154, isocon
154 are arranged at the end of connecting tube 153, and positioned at the oil outlet end of compressor 110, isocon 154 respectively with main oil pipe 151 and auxiliary
Oil pipe 162 connects.Isocon 154 can play a part of shunting lubricating oil, ensure that lubricating oil flow is steady so that lubricating oil energy
It is enough smoothly to enter in main hydraulic pipe 152 and auxiliary liquid pipe 163, while also ensure that lubricating oil enters main heat exchanger 140 and auxiliary heat exchange
Flow in device 161.
As a kind of embodiment, auxiliary heat-exchanging component 160 also includes the first valve 164, and the first valve 164 is arranged at
On auxiliary oil pipe 162 between compressor 110 and auxiliary heat exchanger 161.First valve 164 is for realizing auxiliary heat-exchanging component 160
Break-make, whether the auxiliary heat exchanger 161 in control auxiliary heat-exchanging component 160 participate in exchanging heat.When first valve 164 is opened, profit
Lubricating oil can be exchanged heat by auxiliary heat exchanger 161, and now auxiliary heat exchanger 161 participates in heat exchanger；After first valve 164 is closed,
Lubricating oil can not be entered in auxiliary heat exchanger 161, and now auxiliary heat exchanger 161 is not involved in heat exchanger.It should be noted that work as cold oil
System 100 by main heat exchanger 140 heat exchange can meet demand when, the first valve 164 is closed；When the part of main heat exchanger 140
When runner is blocked or compressor 110 is run under limiting condition, single main heat exchanger 140 can not meet heat exchange demand, now,
First valve 164 is opened so that auxiliary heat exchanger 161 participates in heat exchange, ensures that cold oil system 100 has enough heat transfer effects.Such as
Shown in Fig. 1, the first valve 164 is arranged on auxiliary oil pipe 162；If any shown in Fig. 3, the first valve 164 is arranged on spoke oil inlet pipe.
It is preferred that in the present embodiment, the first valve 164 is magnetic valve；Certainly, in other embodiment of the present utility model, the
One valve 164 can also be other kinds of valve.
Referring to Fig. 1, further, can main heat exchanger 140 meet that the heat exchange demand of cold oil system 100 is passed by temperature
What sensor 170 judged.Specifically, cold oil system 100 also includes temperature sensor 170, temperature sensor 170 is arranged at compressor
110 oil inlet end, and electrically connected with the first valve 164.Temperature sensor 170 can detect the actual oil temperature supplying of lubricating oil.
Temperature sensor 170 is able to detect that the temperature of main heat exchanger 140 and the lubricating oil after the cooling of auxiliary heat exchanger 161, and the temperature is
For the actual oil temperature supplying of lubricating oil in compressor 110.Cold oil system 100 is in original state, the initial shape of the first valve 164
State is closes, only when the actually detected value of temperature sensor 170 is that actual oil temperature supplying is i.e. default beyond security settings scope
During oil temperature supplying, the first valve 164 is switched to opening.Now, the running situation of cold oil system 100 is divided into following several：
The impurity such as larger particles are not present when the cleannes of lubricating oil are higher, and compressor 110 operates in nominal situation bar
When under part, the impurity in lubricating oil will not block the corrugated channel of main heat exchanger 140, i.e., detected when temperature sensor 170
When actual oil temperature supplying is less than default oil temperature supplying, the exchange capability of heat and pressure drop performance of independent main heat exchanger 140 disclosure satisfy that peace
Full service requirement, the first valve 164 are closed, and are changed at this point for for cold oil system 100 equivalent to an only master
Hot device 140 is operated, consistent with current single plate type heat exchanger cold oil system architecture.Now, the system in cold oil system 100
Refrigerant circuit still has major-minor two, and the refrigerant in auxiliary heat exchanger 161 is more equivalent to having without any heat exchange work
Refrigerant has been participated in the cooling of motor 120, and this has certain auxiliary to make for improving the too high phenomenon of the temperature of motor 120
With.
When the impurity such as larger particles in lubricating oil be present, when making to block in the narrow and small corrugated channel of main heat exchanger 140,
And then cause the exchange capability of heat of main heat exchanger 140 to decline, now actual oil temperature supplying can constantly rise, when temperature sensor 170
When the actual oil temperature supplying detected exceedes default oil temperature supplying, the first valve 164 will be opened, and now auxiliary heat exchanger 161 also will
Work is participated in, now main heat exchanger 140 is in concurrent working state with auxiliary heat exchanger 161, so, even if there is part ripple flow
The stopping state in road, can still ensure that enough heat exchange runners carry out heat exchange work, so as to ensure compressor 110 run when
Actual oil temperature supplying is always held in the range of security settings, and this cold oil system 100 is provided with higher fault-tolerance and reliability.
When under compressor 110 operates in some limiting conditions such as peak load, due to needing the part of oil lubrication to be in
In high load operation state, thus when the caloric value of part is with respect under the conditions of nominal situation it is bigger than normal a lot, come out from oil pump 190
Oil temperature also can it is higher much and the exchange capability of heat of main heat exchanger 140 is limited, now actual oil temperature supplying can constantly rise, and work as temperature
When the actual oil temperature supplying that degree sensor 170 detects exceedes default oil temperature supplying, the first valve 164 will be opened, now auxiliary to change
Hot device 161 will also participate in work, so as to form the state of main heat exchanger 140 and the auxiliary concurrent working of heat exchanger 161, thus make
The heat exchange load that 140 need of main heat exchanger undertake original half is obtained, is supplied so as to improve compressor 110 under some limiting conditions
The too high phenomenon of oil temperature, improve the reliability of operation of cold oil system 100.As the above situation, this cold oil system 100
Structure type has certain booster action for improving the too high phenomenon of the temperature of motor 120.
Moreover, cold oil system 100 also includes pressure sensor 180, pressure sensor 180 is arranged at entering for compressor 110
Oily end, and electrically connected with the first valve 164.Pressure sensor 180 can detect the actual charge oil pressure of lubricating oil.Main heat exchanger
Can 140 meet that the heat exchange demand of cold oil system 100 can also be judged by pressure sensor 180.Pressure sensor 180 can be examined
The pressure of main heat exchanger 140 and the lubricating oil after the cooling of auxiliary heat exchanger 161 is measured, the pressure is lubricating oil in compressor 110
Actual charge oil pressure.For cold oil system 100 in original state, the original state of the first valve 164 only works as pressure to close
The actually detected value of sensor 180 be actual charge oil pressure beyond security settings scope preset charge oil pressure when, the first valve
164 are switched to opening.Now, the running situation of cold oil system 100 is divided into following several：
The impurity such as larger particles are not present when the cleannes of lubricating oil are higher, and compressor 110 operates in nominal situation bar
When under part, the impurity in lubricating oil will not block the corrugated channel of main heat exchanger 140, i.e., detected when pressure sensor 180
When actual charge oil pressure is less than default charge oil pressure, the exchange capability of heat and pressure drop performance of independent main heat exchanger 140 disclosure satisfy that peace
Full service requirement, the first valve 164 are closed, and are changed at this point for for cold oil system 100 equivalent to an only master
Hot device 140 is operated, consistent with current single plate type heat exchanger cold oil system architecture.Now, the system in cold oil system 100
Refrigerant circuit still has major-minor two, and the refrigerant in auxiliary heat exchanger 161 is more equivalent to having without any heat exchange work
Refrigerant has been participated in the cooling of motor 120, and this has certain auxiliary to make for improving the too high phenomenon of the temperature of motor 120
With.
When the impurity such as larger particles in lubricating oil be present, when making to block in the narrow and small corrugated channel of main heat exchanger 140,
And then cause the pressure drop of main heat exchanger 140 to increase, now actual charge oil pressure can constantly decline, when pressure sensor 180 detects
When the actual charge oil pressure arrived exceedes default charge oil pressure, the first valve 164 will be opened, and now auxiliary heat exchanger 161 will also participate in
Work, now main heat exchanger 140 is in concurrent working state with auxiliary heat exchanger 161, in such manner, it is possible to inhibit caused by blocking
Pressure drop increases phenomenon, so as to which actual charge oil pressure when ensureing that compressor 110 is run is always held in the range of security settings, this
Cold oil system 100 is provided with higher fault-tolerance and reliability.
It should be noted that can be used alone temperature sensor 170 in cold oil system 100 of the present utility model, also may be used
Be used alone pressure sensor 180, can also temperature sensor 170 be used cooperatively with pressure sensor 180.Temperature is used alone to pass
Sensor 170 has been noted above with pressure sensor 180 is used alone in upper part, now only to temperature sensor 170 and pressure
Sensor 180 is used cooperatively and is described.Now, the running situation of cold oil system 100 is divided into following several：
The impurity such as larger particles are not present when the cleannes of lubricating oil are higher, and compressor 110 operates in nominal situation bar
When under part, the impurity in lubricating oil will not block the corrugated channel of main heat exchanger 140, i.e., detected when temperature sensor 170
Actual oil temperature supplying is less than default oil temperature supplying, and the actual charge oil pressure that pressure sensor 180 detects is less than default fuel feeding pressure
During power, the exchange capability of heat and pressure drop performance of independent main heat exchanger 140 disclosure satisfy that safe operation requirement, and the first valve 164 is in
Closed mode, it is operated at this point for for cold oil system 100 equivalent to an only main heat exchanger 140, with current list
Individual plate type heat exchanger cold oil system architecture is consistent.Now, the refrigerant loop in cold oil system 100 still has major-minor two, auxiliary
Refrigerant in heat exchanger 161 has participated in the cold of motor 120 without any heat exchange work equivalent to there is more refrigerants
But in, this has certain booster action for improving the too high phenomenon of the temperature of motor 120.
When the impurity such as larger particles in lubricating oil be present, when making to block in the narrow and small corrugated channel of main heat exchanger 140,
And then cause the exchange capability of heat decline and pressure drop increase of main heat exchanger 140, now actual oil temperature supplying can constantly rise, actual to supply
Oil pressure can constantly decline, when the actual oil temperature supplying that temperature sensor 170 detects exceedes default oil temperature supplying, pressure sensing
When the actual charge oil pressure that device 180 detects exceedes default charge oil pressure, the first valve 164 will be opened, now auxiliary heat exchanger 161
Also work will be participated in, now main heat exchanger 140 is in concurrent working state with auxiliary heat exchanger 161, so, even if there is subwave
The stopping state of line runner, it can still ensure that enough heat exchange runners carry out heat exchange work, in addition, can also inhibit because stifled
Pressure drop caused by plug increases phenomenon, and actual oil temperature supplying and the actual charge oil pressure during so as to ensure that compressor 110 is run are always
It is maintained in the range of security settings, this cold oil system 100 is provided with higher fault-tolerance and reliability.
When under compressor 110 operates in some limiting conditions such as peak load, due to needing the part of oil lubrication to be in
In high load operation state, thus when the caloric value of part is with respect under the conditions of nominal situation it is bigger than normal a lot, come out from oil pump 190
Oil temperature also can it is higher much and the exchange capability of heat of main heat exchanger 140 is limited, now actual oil temperature supplying can constantly rise, and work as temperature
When the actual oil temperature supplying that degree sensor 170 detects exceedes default oil temperature supplying, the first valve 164 will be opened, now auxiliary to change
Hot device 161 will also participate in work, so as to form the state of main heat exchanger 140 and the auxiliary concurrent working of heat exchanger 161, thus make
The heat exchange load that 140 need of main heat exchanger undertake original half is obtained, is supplied so as to improve compressor 110 under some limiting conditions
The too high phenomenon of oil temperature, improve the reliability of operation of cold oil system 100.As the above situation, this cold oil system 100
Structure type has certain booster action for improving the too high phenomenon of the temperature of motor 120.
As shown in figure 1, in the present embodiment, the quantity of auxiliary heat-exchanging component 160 is one, and auxiliary heat exchanger 161 changes with master
Hot device 140 is arranged in parallel, and the both ends of the both ends of auxiliary oil pipe 162 respectively with connecting tube 153 connect, by auxiliary liquid pipe 163 respectively with
Motor 120 and condenser 130 connect.Pass through 160 1 auxiliary heat exchangers 161 of an auxiliary heat-exchanging component and main heat exchanger 140
Parallel connection, it can so ensure that rise in parallel with an auxiliary heat exchanger 161 of main heat exchanger 140 is opened while carry out cooling work, can be significantly
The fault-tolerance and reliability of cold oil system 100 are improved, ensures the normal operation of compressor 110.
As shown in Fig. 2 in another embodiment of the present utility model, for a upper embodiment, auxiliary heat-exchanging group
Part 160 also includes the second valve 165, and the second valve 165 is arranged at the auxiliary liquid pipe 163 between condenser 130 and auxiliary heat exchanger 161
On, the second valve 165 links with the first valve 164.When the first valve 164 is closed, auxiliary heat exchanger 161 is not involved in the work that exchanges heat
Make, from auxiliary liquid pipe 163 enter the refrigerant in auxiliary heat exchanger 161 in this cold oil system 100 not reduction lubricating oil temperature
Effect, and this part of refrigerant can reduce effective refrigerating capacity of compressor 110, increase the energy consumption of compressor 110.Therefore,
The present embodiment sets the second valve 165 in auxiliary liquid pipe 163, and the break-make of auxiliary liquid pipe 163 is controlled by the second valve 165.Moreover,
When the first valve 164 is opened, the second valve 165 is opened, and auxiliary liquid pipe 163 can realize that refrigerant circulates；When the second valve 165
During closing, the second valve 165 is also switched off, and refrigerant cannot flow into auxiliary liquid pipe 163.Heat exchange is participated in when not needing auxiliary heat exchanger 161
When, the first valve 164 and the second valve 165 are in closed mode, when auxiliary heat exchanger 161 needs to participate in heat exchange, the first valve
Door 164 is opened simultaneously with the second valve 165.It is preferred that in the present embodiment, the second valve 165 is magnetic valve；Certainly, at this
In the other embodiment of utility model, the second valve 165 can also be other kinds of valve.As shown in Fig. 2 the second valve
165 are arranged in auxiliary liquid pipe 163；Certainly, the second valve 165 can also be provided on auxiliary liquid inlet pipe.
Referring to Fig. 3, in another embodiment of the present utility model, the quantity of auxiliary heat-exchanging component 160 is at least two, extremely
Few two auxiliary heat exchangers 161 are arranged in parallel, and are arranged in parallel with main heat exchanger 140, the auxiliary oil of at least two supplementary heat exchangers 160
Both ends of the both ends of pipe 162 respectively with main oil pipe 151 connect, the both ends of auxiliary liquid pipe 163 respectively with motor 120 and condenser 130
Connection.It is in parallel with main heat exchanger 140 by least two auxiliary heat-exchanging components, 160 at least two auxiliary heat exchanger 161, so
It can ensure that rise in parallel with least two auxiliary heat exchangers 161 of main heat exchanger 140 is opened while carry out cooling work, be greatly improved cold
The fault-tolerance and reliability of oil system 100, ensure the normal operation of compressor 110, may now increase whole cold oil system 100
Size and cost, but for the service behaviour compared to cold oil system 100, it is negligible.
Referring to Fig. 1, the utility model additionally provides a kind of control method of cold oil system 100, applied to above-described embodiment
In cold oil system 100, comprise the following steps：
Control whether auxiliary heat-exchanging component 160 participates in the work that exchanges heat according to the actual oil temperature supplying of compressor 110；
If the actual oil temperature supplying of compressor 110 is higher than the default oil temperature supplying of compressor 110, auxiliary heat-exchanging component 160
In auxiliary heat exchanger 161 participate in heat exchange, lubricating oil is respectively delivered to lead by compressor 110 by main oil pipe 151 and auxiliary oil pipe 162
In heat exchanger 140 and auxiliary heat exchanger 161, it is back to after heat exchange in compressor 110, refrigerant is passed through main hydraulic pipe by condenser 130
152 and auxiliary liquid pipe 163 be respectively delivered in main heat exchanger 140 and auxiliary heat exchanger 161, heat exchanger flow into motor 120 in；
If the actual oil temperature supplying of compressor 110 is less than the default oil temperature supplying of compressor 110, main heat exchanger 140 exchanges heat.
The impurity such as larger particles are not present when the cleannes of lubricating oil are higher, and compressor 110 operates in nominal situation bar
When under part, the impurity in lubricating oil will not block the corrugated channel of main heat exchanger 140, i.e., the reality that temperature sensor 170 detects
Border oil temperature supplying is less than default oil temperature supplying, and the actual charge oil pressure that pressure sensor 180 detects is less than default charge oil pressure,
The exchange capability of heat and pressure drop performance of independent main heat exchanger 140 disclosure satisfy that safe operation requirement, and the first valve 164, which is in, closes shape
State, it is operated at this point for for cold oil system 100 equivalent to an only main heat exchanger 140, it is and current single board-like
Heat exchanger cold oil 100 structures of system are consistent.
When the impurity such as larger particles in lubricating oil be present, when making to block in the narrow and small corrugated channel of main heat exchanger 140,
Or compressor 110 is operated under some limiting conditions such as peak load, when the caloric value of part is with respect under the conditions of nominal situation
When bigger than normal a lot, the actual oil temperature supplying that temperature sensor 170 detects exceedes default oil temperature supplying, and the first valve 164 will be opened
Open, now auxiliary heat exchanger 161 will also participate in work, and now main heat exchanger 140 is in concurrent working state with auxiliary heat exchanger 161,
So, even if there is the stopping state of part corrugated channel, it can still ensure that enough heat exchange runners carry out heat exchange work, from
And ensureing that actual oil temperature supplying when compressor 110 is run is always held in the range of security settings, this cold oil system 100 has
Higher fault-tolerance and reliability.
Now, the actual oil temperature supplying of compressor 110 has two kinds of situations higher than the default oil temperature supplying of compressor 110：
Oil temperature supplying is preset when the actual oil temperature supplying of compressor 110 is higher than, and the actual charge oil pressure of compressor 110 is low
In the default charge oil pressure of compressor 110, auxiliary heat exchanger 161 participates in heat exchange.
When the impurity such as larger particles in lubricating oil be present, when making to block in the narrow and small corrugated channel of main heat exchanger 140,
And then cause the exchange capability of heat decline and pressure drop increase of main heat exchanger 140, now actual oil temperature supplying can constantly rise, actual to supply
Oil pressure can constantly decline, when the actual oil temperature supplying that temperature sensor 170 detects exceedes default oil temperature supplying, pressure sensing
When the actual charge oil pressure that device 180 detects exceedes default charge oil pressure, the first valve 164 will be opened, now auxiliary heat exchanger 161
Also work will be participated in, now main heat exchanger 140 is in concurrent working state with auxiliary heat exchanger 161, so, even if there is subwave
The stopping state of line runner, it can still ensure that enough heat exchange runners carry out heat exchange work, in addition, can also inhibit because stifled
Pressure drop caused by plug increases phenomenon, and actual oil temperature supplying and the actual charge oil pressure during so as to ensure that compressor 110 is run are always
It is maintained in the range of security settings, this cold oil system 100 is provided with higher fault-tolerance and reliability.
The actual oil temperature supplying of compressor 110 is higher than default oil temperature supplying, and the actual charge oil pressure of compressor 110 is less than etc.
In the default charge oil pressure of compressor 110, auxiliary heat exchanger 161 participates in heat exchange.
When under compressor 110 operates in some limiting conditions such as peak load, due to needing the part of oil lubrication to be in
In high load operation state, thus when the caloric value of part is with respect under the conditions of nominal situation it is bigger than normal a lot, come out from oil pump 190
Oil temperature also can it is higher much and the exchange capability of heat of main heat exchanger 140 is limited, now actual oil temperature supplying can constantly rise, and work as temperature
When the actual oil temperature supplying that degree sensor 170 detects exceedes default oil temperature supplying, the first valve 164 will be opened, now auxiliary to change
Hot device 161 will also participate in work, so as to form the state of main heat exchanger 140 and the auxiliary concurrent working of heat exchanger 161, thus make
The heat exchange load that 140 need of main heat exchanger undertake original half is obtained, is supplied so as to improve compressor 110 under some limiting conditions
The too high phenomenon of oil temperature, improve the reliability of operation of cold oil system 100.
The utility model additionally provides a kind of air-conditioning equipment, including the cold oil system 100 in above-described embodiment.This practicality is new
The air-conditioning equipment of type ensures normal operation by cold oil system 100, improves the reliability of work.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the record scope of this specification is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to the utility model patent scope.It should be pointed out that for the common of this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of cold oil system, it is characterised in that including compressor (110), motor (120), condenser (130), pipeline assembly
(150), main heat exchanger (140) and at least one auxiliary heat-exchanging component (160)；
The pipeline assembly (150) includes main oil pipe (151), main hydraulic pipe (152) and connecting tube (153), the main oil pipe (151)
The main heat exchanger (140), and the both ends of the connecting tube (153) and the main oil pipe are worn with the main hydraulic pipe (152)
(151) connect, the compressor (110) is arranged in the connecting tube (153)；
One end of the main hydraulic pipe (152) connects with the motor (120), the other end of the main hydraulic pipe (152) with it is described cold
Condenser (130) connects；
The auxiliary heat-exchanging component (160) includes auxiliary heat exchanger (161), auxiliary oil pipe (162) and auxiliary liquid pipe (163), the auxiliary oil
Pipe (162) and the auxiliary liquid pipe (163) wear the auxiliary heat exchanger (161), and the both ends of the auxiliary oil pipe (162) are and institute
State the both ends connection of connecting tube (153)；
One end of the auxiliary liquid pipe (163) connects with the motor (120), the other end of the auxiliary liquid pipe (163) with it is described cold
Condenser (130) connects, and the main heat exchanger (140) is arranged in parallel with least one auxiliary heat exchanger (161).
2. cold oil system according to claim 1, it is characterised in that the auxiliary heat-exchanging component (160) also includes first
Valve (164), first valve (164) are arranged at described between the compressor (110) and the auxiliary heat exchanger (161)
On auxiliary oil pipe (162).
3. cold oil system according to claim 2, it is characterised in that the cold oil system also includes temperature sensor
(170), the temperature sensor (170) is arranged at the oil inlet end of the compressor (110), and with first valve (164)
Electrical connection；
The temperature sensor (170) can detect the actual oil temperature supplying of lubricating oil.
4. cold oil system according to claim 3, it is characterised in that the cold oil system also includes pressure sensor
(180), the pressure sensor (180) is arranged at the oil inlet end of the compressor (110), and with first valve (164)
Electrical connection；
The pressure sensor (180) can detect the actual charge oil pressure of the lubricating oil.
5. cold oil system according to claim 2, it is characterised in that the auxiliary heat-exchanging component (160) also includes second
Valve (165), second valve (165) are arranged at the institute between the condenser (130) and the auxiliary heat exchanger (161)
State in auxiliary liquid pipe (163), and second valve (165) links with first valve (164).
6. cold oil system according to claim 2, it is characterised in that the cold oil system also includes oil pump (190), described
Oil pump (190) is arranged in the connecting tube (153), and positioned at the oil outlet end of the compressor (110).
7. cold oil system according to claim 6, it is characterised in that the pipeline assembly (150) also includes isocon
(154), the isocon (154) is arranged at the end of the connecting tube (153), and positioned at the fuel-displaced of the compressor (110)
End, the isocon (154) connect with the main oil pipe (151) and the auxiliary oil pipe (162) respectively.
8. the cold oil system according to any one of claim 1 to 7, it is characterised in that the auxiliary heat-exchanging component (160)
Quantity is one, and the auxiliary heat exchanger (161) is arranged in parallel with the main heat exchanger (140), the both ends of the auxiliary oil pipe (162)
The both ends with the connecting tube (153) connect respectively, by the auxiliary liquid pipe (163) respectively with the motor (120) and described
Condenser (130) connects.
9. the cold oil system according to any one of claim 1 to 7, it is characterised in that the auxiliary heat-exchanging component (160)
Quantity is at least two, and at least two auxiliary heat exchangers (161) are arranged in parallel, and in parallel with the main heat exchanger (140) is set
Put, the both ends of the auxiliary oil pipe (162) of at least two auxiliary heat-exchanging components (160) respectively with the connecting tube (153)
Both ends connection, the both ends of the auxiliary liquid pipe (163) connect with the motor (120) and the condenser (130) respectively.
10. a kind of air-conditioning equipment, it is characterised in that including the cold oil system (100) as described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720709772.1U CN206943073U (en) | 2017-06-16 | 2017-06-16 | Air conditioning equipment and cold oil system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720709772.1U CN206943073U (en) | 2017-06-16 | 2017-06-16 | Air conditioning equipment and cold oil system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206943073U true CN206943073U (en) | 2018-01-30 |
Family
ID=61364516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720709772.1U Active CN206943073U (en) | 2017-06-16 | 2017-06-16 | Air conditioning equipment and cold oil system thereof |
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| Country | Link |
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| CN (1) | CN206943073U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120305A (en) * | 2017-06-16 | 2017-09-01 | 珠海格力电器股份有限公司 | Air conditioning equipment, cold oil system and control method thereof |
-
2017
- 2017-06-16 CN CN201720709772.1U patent/CN206943073U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120305A (en) * | 2017-06-16 | 2017-09-01 | 珠海格力电器股份有限公司 | Air conditioning equipment, cold oil system and control method thereof |
| CN107120305B (en) * | 2017-06-16 | 2023-11-24 | 珠海格力电器股份有限公司 | Air conditioning equipment, oil cooling system and control method of oil cooling system |
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