CN209150916U - A kind of half seals the electromotor cooling system of centrifugal compressor - Google Patents
A kind of half seals the electromotor cooling system of centrifugal compressor Download PDFInfo
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- CN209150916U CN209150916U CN201822115136.3U CN201822115136U CN209150916U CN 209150916 U CN209150916 U CN 209150916U CN 201822115136 U CN201822115136 U CN 201822115136U CN 209150916 U CN209150916 U CN 209150916U
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Abstract
The utility model discloses the electromotor cooling systems that a kind of half seals centrifugal compressor, rotor is arranged on the motor shaft, motor stator is arranged on rotor, motor case is provided with outside motor stator, motor shaft both ends and motor case joint are provided with bearing block, the both ends of motor stator winding are provided with several thermistor (temperature) sensors, the first cooling channels are provided between motor case and motor stator outer circle, the electric expansion valve for controlling the first cooling channels inner refrigerant flow is provided on motor case, motor left and right ends are provided with the cooling channels outlet being connected with the first cooling channels；The temperature that the utility model can be detected according to thermistor (temperature) sensor adjusts the aperture of electric expansion valve, to control the spouting liquid of refrigerant when motor cooling, mode is sprayed using directional scattering shape, while refrigerant feed liquid amount significantly reduces, and improves the operational reliability of compressor.
Description
Technical field
The utility model belongs to semi-enclosed centrifugal compressor technical field, in particular to a kind of half envelope centrifugal compressor
Electromotor cooling system.
Background technique
Currently, the type of cooling for semi-enclosed centrifugal compressor is all in such a way that refrigerant liquid is cooling.But
Common electromotor cooling system design and the design of mechanical structure are not optimization, can realize motor by several ways
Cool down: 1, the refrigerant liquid for introducing high pressure is injected directly into inside electric machine casing, is realized while being cooled down rotor and motor
Stator.Motor stator portion is immersed in refrigerant liquid, is gasified after the heat of refrigerant liquid absorption motor stator and rotor,
The phase transformation of refrigerant absorbs a large amount of gasification latent heat, cooling motor, and the refrigerant gas after gasification returns to the evaporator of low pressure
Or in air intake duct, the liquid supply rate and return-air flow of refrigerant reach self-balancing, can pass through the control refrigerant hydrojet of valve
Amount.This mode has the mode for planting feed flow, and electric machine casing surface is colder, is easy condensation, while refrigerating capacity loses more, motor
The windage loss of rotor is larger since amount of liquid increases.2, it is similar using in the direct hydrojet to machine cavity of high-pressure refrigerant
The motor type of cooling of irrigation formula, cooling effect of motor very little simple using refrigerant cooling structure.
Utility model content
Aiming at the problems existing in the prior art, the utility model provides a kind of motor cooling of half envelope centrifugal compressor
System, the temperature that can be detected according to thermistor (temperature) sensor adjust the aperture of electric expansion valve, thus when controlling motor cooling
The spouting liquid of refrigerant sprays mode using directional scattering shape, and cooling effect of motor is splendid, while refrigerant feed liquid amount is significant
It reduces, improves the operational reliability of compressor, while improving the operational efficiency of compressor.
The technical scheme adopted by the utility model is a kind of half seals the electromotor cooling system of centrifugal compressor, packet
Motor case, motor stator, rotor and motor shaft are included, rotor, the rotor are arranged on the motor shaft
On be arranged with motor stator, motor case, the motor shaft both ends and motor case joint are provided with outside the motor stator
Be provided with bearing block, the both ends of the motor stator winding are provided with several thermistor (temperature) sensors, the motor case with
It is provided with the first cooling channels between motor stator outer circle, is provided on the motor case for controlling the first cooling stream
The electric expansion valve of body channel inner refrigerant flow, the motor left and right ends are provided with to be connected with the first cooling channels
Cooling channels outlet.
In the above-mentioned technical solutions, the thermistor temp probe of machine winding embedded set can be according to actually detected electricity
Machine temperature controls the aperture of electric expansion valve, to control the flow for the refrigerant for entering the intracorporal cooling motor of motor casing；
It is provided with electric expansion valve before the entrance of motor coolant liquid, the flow of refrigerant can be accurately controlled, control target value is motor
Temperature, control parameter include compressor operation pressure ratio, compressor load and coolant temperature etc., it is therefore an objective to be guaranteed reliable and stable
Motor temperature control condition under, avoid excessive feed flow cause motor performance reduce and electric machine casing surface condensation, electronic expansion
Valve plays the role of reducing pressure by regulating flow simultaneously, so that coolant liquid is entered motor case and continues cooling motor stator enamelled wire packet header and electricity
The refrigerant of machine rotor is intermediate pressure rather than high-pressure.
Preferably, the cooling channels outlet is arranged on the bearing block at motor shaft both ends, sets on the bearing block
It is equipped with first annular channel, the refrigerant of the cooling channels outlet flows into first annular channel by three directions
Interior, the distance between the first annular channel internal diameter and outer diameter are much smaller than the internal diameter of cooling channels.
In the above-mentioned technical solutions, the refrigerant liquid in three directions in cooling channels exit uniformly flows into narrow
First annular channel in, in the circular passage to narrow, refrigerant generate local pressure loss, generate refrigerant shwoot, gas
The refrigerant flow rates of liquid two-phase increase, and gas flow is bigger, and void fraction is bigger, and circulation passage can become narrower, and flow velocity is higher,
On gas-fluid two-phase mixture spray to the enameled wire packet header at motor stator both ends fog-like, rotor is further cooled down.
Preferably, the cooling channels outlet is arranged on the bearing block at motor shaft both ends, on the inside of the bearing block
It is provided with the second circular passage, the refrigerant of the cooling channels outlet is flowed downwardly into the second circular passage, described
It is evenly arranged with several the first capillary spray ports and several the second capillary spray ports on second circular passage, described first mao
The spray angles of thin spray port tilt upward, and the spray angles of the second capillary spray port are diagonally downward.
Preferably, the cooling channels outlet is arranged on the bearing block at motor shaft both ends, on the inside of the bearing block
Radial direction has is disposed with third circular passage and fourth annular channel outside to inside, the refrigerant of the cooling channels outlet
It flows downwardly in third circular passage and fourth annular channel, several third hairs is evenly arranged on the third circular passage
Thin spray port is evenly arranged with several the 4th capillary spray ports, the third capillary spray port on the fourth annular channel
Spray angles tilt upward, the spray angles of the 4th capillary spray port are diagonally downward.
In the above-mentioned technical solutions, the effect of capillary mouth spray is as follows: 1, can be by the middle pressure from electric expansion valve
Refrigerant liquid throttles to the refrigerant air-liquid two-phase mixture of low pressure, simultaneously because the reduction of actual internal area, flow velocity is improved,
Pinpoint Liquid injection cooling rotor and stator.2, according to the temperature of actual motor stator and rotor, it is accurately controlled EEV electricity
The jet speed of the aperture of machine expansion valve and the liquid supply rate of refrigerant, capillary mouth spray is high, sprays the refrigerant of capillary mouth spray
Gas-liquid mixture can be very good to mix, and enter in cavity once spraying, the unexpected raising of flow area, be formed fast
The effect of speed atomization, rather than high-speed liquid stream impacts enameled wire；Atomizing effect is better, and refrigerant liquid disperse effect is better,
The contact area of liquid and machine winding increases, and the caloric receptivity and cooling effect of gasification latent heat are more significant.3, capillary mouth spray
Direction is not the cooling stator of direct alignment institute and rotor surface, but in the top of cooling surface, so as to atomization
Drop disperse cools down electronics and rotor in space.4, the position of capillary mouth spray and cooling surface guarantee certain gap,
For being atomized disperse, impact motor is avoided.
Preferably, the cooling channels outlet is arranged above motor case both ends, and the cooling channels go out
It is provided with umbrella spray thrower below mouthful, is provided with spray port below the umbrella spray thrower.
In the above-mentioned technical solutions, motor stator surface is sprayed in umbrella form, the cooling refrigerant used of total motor
Flow very little, but by the way that after several very tiny spray ports, refrigerant is in this reducing pressure by regulating flow, refrigerant two-phase mixtures
The mass dryness fraction of object increases, and the refrigerant gas after shwoot in throttling process is fog-like after spray port ejection together with refrigerant drop
It is distributed in machine cavity, achievees the effect that the cooling motor of optimization.
Preferably, the cooling channels outlet is arranged above motor case both ends, and the cooling channels go out
It is provided with ring sparger below mouthful, is provided with spray port below the ring sparger, ring sparger can guarantee to freeze
Agent more fully hereinafter cools down motor, and cooling effect is more preferably.
Preferably, cricoid second cooling channels, extra refrigeration are provided in the silicon steel sheet of the motor stator
Agent liquid in channel along flowing and further cool down dynamo sheet to be effectively reduced motor temperature.
Preferably, it is provided with any one of helicla flute, baffle plate or partition in the cooling channels, passes through spiral
Slot, baffle plate or partition confuse the flowing flow pattern of refrigerant liquid, make refrigerant liquid sufficiently and the contact of motor stator outer circle, system
The calorific value of the stator silicon steel sheet of cryogen liquid absorption a part forms fixed cold curtain layer in motor periphery, that is, forms one
The insulating layer of low temperature.
Preferably, the outlet port of the spray port is arranged at radial distribution, and according to certain even angle, from length
Degree side looks up, and spray port goes up arranged in groups along its length, and the outlet port of each spray port opens chamfering, ensure that ejection
The outside large angle scattering of refrigerant liquid.
Preferably, the interior electrical path length in second circular passage, third circular passage and fourth annular channel is less than first
The interior electrical path length of cooling channels, the design are more preferable convenient for the second circular passage, third circular passage and fourth annular channel
Flow out refrigerant liquid in ground.
The beneficial effect that the utility model reaches is:
1, it is provided with electric expansion valve before the cooling feed liquor of motor, for being accurately controlled the flow of refrigerant, controls mesh
Scale value is motor temperature, and control parameter includes compressor operation pressure ratio, compressor load, cooling water temperature etc., is guaranteed reliable
Stable motor temperature control condition under, avoid reduced performance caused by excessive feed flow, cause electric machine casing surface condensation etc..
2, thermistor (temperature) sensor is arranged in both ends in machine winding, controls electronics according to actually detected motor temperature
The aperture of expansion valve, to control the flow for entering electric machine casing inner refrigerant.
3, helicla flute is set in cooling channels or baffle plate, the modes such as partition confuses the flowing of refrigerant liquid
Flow pattern, makes refrigerant liquid sufficiently and the contact of motor stator outer circle, refrigerant liquid absorb the hair of the stator silicon steel sheet of a part
Heat forms fixed cold curtain layer in motor periphery, that is, forms the insulating layer of a low temperature.
4, the further reducing pressure by regulating flow of spray port, refrigerant shwoot improve refrigerant flow rates, are flowed into greatly from slight restriction mouth
When in the electric machine casing of space, the sudden enlargement of flow area, so that the atomized refrigerant liquid that spray port sprays disperse shape is gentle
There is maximized contact area to touch electricity when touching rotor enameled wire packet header for the mixture of body, misty mixture
Machine rotor surface when motor-stator silicon-steel sheet surface, can maximumlly absorb motor radiating amount, be refrigeration by latent heat shwoot
Agent gas, to have more excellent cooling effect of motor.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawing,
Fig. 1 is structural schematic diagram when first annular channel being arranged in the utility model；
Fig. 2 is sectional view of the utility model Fig. 1 along the direction A-A；
Fig. 3 is the structural schematic diagram of the utility model Fig. 1 bottom bracket；
Fig. 4 is structural schematic diagram when the second circular passage being arranged in the utility model；
Fig. 5 is sectional view of the utility model Fig. 4 along the direction A-A；
Fig. 6 is the structural schematic diagram of the utility model Fig. 4 bottom bracket；
Fig. 7 is structural schematic diagram when third circular passage and fourth annular channel being arranged in the utility model；
Fig. 8 is sectional view of the utility model Fig. 7 along the direction A-A；
Fig. 9 is the structural schematic diagram of the utility model Fig. 7 bottom bracket；
Figure 10 is structural schematic diagram when umbrella spray thrower being arranged in the utility model；
Figure 11 is sectional view of the utility model Figure 10 along the direction A-A；
Figure 12 is structural schematic diagram when cyclic annular spray thrower being arranged in the utility model；
Figure 13 is sectional view of the utility model Figure 12 along the direction A-A；
Figure 14 is the structural schematic diagram of the utility model motor stator cooling duct；
Figure 15 is sectional view of the utility model Figure 14 along the direction A-A；
Wherein, 1, motor case, 2, motor stator, 3, rotor, 4, motor shaft, 5, bearing block, the 6, first cooling stream
Body channel, 61, cooling channels outlet, 7, electric expansion valve, 8, first annular channel, the 9, second circular passage, 91, first
Capillary spray port, the 92, second capillary spray port, 10, third circular passage, 101, third capillary spray port, 11, fourth annular it is logical
Road, the 111, the 4th capillary spray port, 12, umbrella spray thrower, 13, spray port,
14, ring sparger, the 15, second cooling channels.
Specific embodiment
Specific embodiments of the utility model will be further explained with reference to the accompanying drawing.
A kind of half seals the electromotor cooling system of centrifugal compressor comprising motor case 1, motor stator 2, rotor
3 and motor shaft 4, rotor 3 is arranged on the motor shaft 4, and motor stator 2, the electricity are arranged on the rotor 3
Motor case 1 is provided with outside machine stator 2,4 both ends of motor shaft and 1 joint of motor case are provided with bearing block 5, the electricity
The both ends of 2 winding of machine stator are provided with several thermistor (temperature) sensor (not shown)s, the motor case 1 and motor stator 2
It is provided with the first cooling channels 6 between outer circle, is provided on the motor case 1 for controlling the first cooling channels
The electric expansion valve 7 of 6 inner refrigerant flows, the motor left and right ends, which are provided with, to be connected with the first cooling channels 6
Cooling channels outlet 61.
Embodiment 1: as shown in Figure 1 to Figure 3, the bearing at 4 both ends of motor shaft is arranged in the cooling channels outlet 61
On seat 5, first annular channel 8 is provided on the bearing block 5, the refrigerant of the cooling channels outlet 61 passes through three
Direction flows into first annular channel 8, and the distance between first annular 8 internal diameter of channel and outer diameter are much smaller than cooling fluid
The internal diameter in channel 6.
In the technical program, the refrigerant liquid in three directions is uniformly flowed into narrow at cooling channels outlet 61
In first annular channel 8, in the circular passage to narrow, refrigerant generates local pressure loss, generates refrigerant shwoot, gas-liquid
The refrigerant flow rates of two-phase increase, and gas flow is bigger, and void fraction is bigger, and circulation passage can become narrower, and flow velocity is higher, gas
On liquid two-phase mixture spray to the enameled wire packet header at 2 both ends of motor stator fog-like, further cooling rotor 3.
Embodiment 2: as shown in Figure 4 and Figure 6, the bearing at 4 both ends of motor shaft is arranged in the cooling channels outlet 61
On seat 5, it is provided with the second circular passage 9 on the inside of the bearing block 5, the refrigerant of the cooling channels outlet 61 is to flowing down
Enter to the second circular passage 9, several the first capillary spray ports 91 and several are evenly arranged on second circular passage 9
The spray angles of a second capillary spray port 92, the first capillary spray port 91 tilt upward, the second capillary spray port
92 spray angles are diagonally downward.
In the technical program, refrigerant liquid is sprayed to 2 enameled wire of motor stator by the upward hydrojet of the first capillary spray port 91
The top in packet header, main cooling motor stator 2 and enameled wire loop, the upward hydrojet of the second capillary spray port 92 spray refrigerant liquid
Gap between rotor 3 and motor stator 2, cooling rotor 3 and 2 internal diameter of motor stator.First capillary spray port
91 and the further reducing pressure by regulating flow of the second capillary spray port 92, refrigerant shwoot improves refrigerant flow rates, flows into from slight restriction mouth
When in large space motor case 1, the sudden enlargement of flow area, so that spray port sprays the atomized refrigerant liquid of disperse shape
With the mixture of gas, misty mixture has maximized contact area, when touching rotor enameled wire packet header, contacts
To 3 surface of rotor, when 2 silicon steel sheet surface of motor stator, motor radiating amount can be maximumlly absorbed, latent heat shwoot is passed through
For refrigerant gas, to have more excellent cooling effect of motor.
Embodiment 3: as shown in figures 7 and 9, the bearing at 4 both ends of motor shaft is arranged in the cooling channels outlet 61
Seat upper 5, the bearing block 5 radially inside has is disposed with third circular passage 10 and fourth annular channel 11 outside to inside, institute
The refrigerant for stating cooling channels outlet 61 flows downwardly in third circular passage 10 and fourth annular channel 11, the third
It is evenly arranged with several third capillary spray ports 101 on circular passage 10, is evenly arranged on the fourth annular channel 11
The spray angles of several the 4th capillary spray ports 111, the third capillary spray port 101 tilt upward, the 4th capillary
The spray angles of spray port 111 are diagonally downward.
In the technical program, in order to preferably realize the cooling of motor stator 2 and rotor 3, it is designed to two independences
Channel, third circular passage 10 be large circle, fourth annular channel 11 be small circle ring, third circular passage 10 and fourth annular
Internal annular groove runner is provided in channel 11, after refrigerant liquid enters in annular groove runner, third capillary spray port 101
Liquid is sprayed to the top in 2 enameled wire packet header of motor stator, main cooling motor stator 2 and enameled wire loop by upward hydrojet, horizontal
Slightly liquid is sprayed to the gap between rotor 3 and motor stator 2 by the 4th capillary spray port 111 of hydrojet in downward direction, cold
But 2 outer diameter of rotor 3 and motor stator, the Position Design of capillary spray port at 2 gap digit of rotor 3 or motor stator
The neat lower section of horizontalization ensure that hydrojet angle just again will not ballistic motion component.
Embodiment 4: as shown in Figure 10 and Figure 11, the cooling channels outlet 61 is arranged on 1 both ends of motor case
Side, 61 lower section of cooling channels outlet are provided with umbrella spray thrower 12, are provided with spray below the umbrella spray thrower 12
Drench mouth 13.
In the technical program, 2 surface of motor stator is sprayed in umbrella form, the stream of the cooling refrigerant used of total motor
Measure very little, but by after several very tiny spray ports, refrigerant in this reducing pressure by regulating flow, refrigerant two-phase mixture
Mass dryness fraction increases, and the refrigerant gas after shwoot in throttling process is together with refrigerant drop from distribution fog-like after spray port ejection
In machine cavity, achieve the effect that the cooling motor of optimization.
Embodiment 5: as shown in Figure 12 and Figure 13, the cooling channels outlet 61 is arranged on 1 both ends of motor case
Side, 61 lower section of cooling channels outlet are provided with ring sparger 14, are provided with spray below the ring sparger 14
Mouth 13 is drenched, ring sparger 13 can guarantee that refrigerant more fully hereinafter cools down motor, and cooling effect is more preferably.
As shown in Figure 14 and Figure 15, cricoid second cooling channels are provided in the silicon steel sheet of the motor stator 2
15, extra refrigerant liquid in channel along flowing and further cool down dynamo sheet to be effectively reduced motor temperature
Degree.
It is the preferred embodiment of the utility model above, does not impose any limitation on the present invention,
All foundation the technical essence of the utility model any simple modification, equivalent change and modification made to the above embodiment,
Belong in the range of utility model technical solution.
Claims (10)
1. a kind of half seals the electromotor cooling system of centrifugal compressor comprising motor case, motor stator, rotor and motor
Axis is arranged with rotor on the motor shaft, and motor stator is arranged on the rotor, is arranged outside the motor stator
There is motor case, the motor shaft both ends and motor case joint are provided with bearing block, which is characterized in that the motor stator
The both ends of winding are provided with several thermistor (temperature) sensors, are provided with first between the motor case and motor stator outer circle
Cooling channels, the electronics being provided with for controlling the first cooling channels inner refrigerant flow on the motor case are swollen
Swollen valve, the motor left and right ends are provided with the cooling channels outlet being connected with the first cooling channels.
2. according to claim 1 a kind of half seals the electromotor cooling system of centrifugal compressor, which is characterized in that the cooling
Outlet flow channels are arranged on the bearing block at motor shaft both ends, and first annular channel is provided on the bearing block, described cold
But the refrigerant of outlet flow channels is flowed into first annular channel by three directions, the first annular channel internal diameter with
The distance between outer diameter is much smaller than the internal diameter of cooling channels.
3. according to claim 1 a kind of half seals the electromotor cooling system of centrifugal compressor, which is characterized in that the cooling
Outlet flow channels are arranged on the bearing block at motor shaft both ends, are provided with the second circular passage on the inside of the bearing block, described
The refrigerant of cooling channels outlet is flowed downwardly into the second circular passage, is evenly arranged on second circular passage
Several the first capillary spray ports and several the second capillary spray ports, the spray angles of the first capillary spray port are tilted towards
On, the spray angles of the second capillary spray port are diagonally downward.
4. according to claim 1 a kind of half seals the electromotor cooling system of centrifugal compressor, which is characterized in that the cooling
Outlet flow channels are arranged on the bearing block at motor shaft both ends, and the bearing block radially inside has is disposed with outside to inside
Three circular passages and fourth annular channel, the refrigerant of cooling channels outlet flow downwardly to third circular passage and the
In four circular passages, several third capillary spray ports are evenly arranged on the third circular passage, the fourth annular is logical
Several the 4th capillary spray ports are evenly arranged on road, the spray angles of the third capillary spray port tilt upward, described
The spray angles of 4th capillary spray port are diagonally downward.
5. according to claim 1 a kind of half seals the electromotor cooling system of centrifugal compressor, which is characterized in that the cooling
Outlet flow channels are arranged above motor case both ends, and cooling channels outlet lower section is provided with umbrella spray thrower,
Spray port is provided with below the umbrella spray thrower.
6. according to claim 1 a kind of half seals the electromotor cooling system of centrifugal compressor, which is characterized in that the cooling
Outlet flow channels are arranged above motor case both ends, and cooling channels outlet lower section is provided with ring sparger,
Spray port is provided with below the ring sparger.
7. according to claim 1 a kind of half seals the electromotor cooling system of centrifugal compressor, which is characterized in that the motor
Cricoid second cooling channels are provided in the silicon steel sheet of stator.
8. according to claim 1 a kind of half seals the electromotor cooling system of centrifugal compressor, which is characterized in that the fluid
Any one of helicla flute, baffle plate or partition are provided in the channel of channel.
9. according to claim 5 a kind of half seals the electromotor cooling system of centrifugal compressor, which is characterized in that the spray
The outlet port of mouth is at radial distribution.
10. according to claim 3 a kind of half seals the electromotor cooling system of centrifugal compressor, which is characterized in that described the
Interior path length of the interior electrical path length in second ring channel, third circular passage and fourth annular channel less than the first cooling channels
Degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822115136.3U CN209150916U (en) | 2018-12-17 | 2018-12-17 | A kind of half seals the electromotor cooling system of centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822115136.3U CN209150916U (en) | 2018-12-17 | 2018-12-17 | A kind of half seals the electromotor cooling system of centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209150916U true CN209150916U (en) | 2019-07-23 |
Family
ID=67290189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822115136.3U Active CN209150916U (en) | 2018-12-17 | 2018-12-17 | A kind of half seals the electromotor cooling system of centrifugal compressor |
Country Status (1)
| Country | Link |
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| CN (1) | CN209150916U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412351A (en) * | 2018-12-17 | 2019-03-01 | 无锡职业技术学院 | A kind of half seals the electromotor cooling system of centrifugal compressor |
| CN114396372A (en) * | 2021-12-24 | 2022-04-26 | 中科仪(南通)半导体设备有限责任公司 | Dry vacuum pump cooling system |
-
2018
- 2018-12-17 CN CN201822115136.3U patent/CN209150916U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412351A (en) * | 2018-12-17 | 2019-03-01 | 无锡职业技术学院 | A kind of half seals the electromotor cooling system of centrifugal compressor |
| CN109412351B (en) * | 2018-12-17 | 2024-04-02 | 无锡职业技术学院 | Motor cooling system of semi-enclosed centrifugal compressor |
| CN114396372A (en) * | 2021-12-24 | 2022-04-26 | 中科仪(南通)半导体设备有限责任公司 | Dry vacuum pump cooling system |
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Effective date of registration: 20221205 Address after: 266555, No. 218, Bay Road, Qingdao economic and Technological Development Zone, Shandong Patentee after: QINGDAO HISENSE HITACHI AIR-CONDITIONING SYSTEMS Co.,Ltd. Address before: 214000 No. 1600, Gao Lang Xi Road, Binhu District, Wuxi, Jiangsu Patentee before: WUXI INSTITUTE OF TECHNOLOGY |
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| TR01 | Transfer of patent right |