CN115891583A - Automobile air conditioning system based on air flotation centrifugal compressor - Google Patents
Automobile air conditioning system based on air flotation centrifugal compressor Download PDFInfo
- Publication number
- CN115891583A CN115891583A CN202211696443.XA CN202211696443A CN115891583A CN 115891583 A CN115891583 A CN 115891583A CN 202211696443 A CN202211696443 A CN 202211696443A CN 115891583 A CN115891583 A CN 115891583A
- Authority
- CN
- China
- Prior art keywords
- air
- centrifugal compressor
- flotation
- heat exchange
- exchange device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to an automobile air conditioning system based on an air flotation centrifugal compressor, which comprises: an air flotation centrifugal compressor configured to compress a refrigerant; a condenser in communication with the air flotation centrifugal compressor; a throttling element in communication with the condenser and the heat exchange device; and the heat exchange device is communicated with the throttling element and the air floatation centrifugal compressor.
Description
Technical Field
The invention relates to the technical field of heat management, in particular to an automobile air conditioning system based on an air flotation centrifugal compressor.
Background
At present, an air conditioning system is an important guarantee for the driving comfort of an automobile. A traditional electronic scroll compressor is adopted to air conditioning system who is used for new energy automobile at present. However, the electric scroll compressor has several disadvantages: the electric scroll compressor assembly has large volume and high weight; the movable scroll and the static scroll of the electric scroll compressor require small fit clearance during operation, have high requirements on the cleanliness of other parts of a system and have poor reliability of system operation, in order to improve the reliability, the compressor oil is required to be used for lubricating and sealing the compressor, the cost of the compressor oil is increased, and the compressor oil is prevented from being deposited in the compressor oil during development so as to influence the system lubrication; after entering a refrigeration system, the compressor oil is mutually soluble with the refrigerant, so that the heat exchange of the refrigerant is influenced, and the refrigerating capacity of the system is directly reduced by more than 5%; due to the existence of the compressor oil, when a system is replaced, the system needs to be accurately supplemented with oil, and after-sales maintenance is not facilitated. Therefore, there is a need for a new air conditioning system for a vehicle that uses a compressor that avoids the above-mentioned problems.
Disclosure of Invention
In order to solve at least part of the above problems in the prior art, the present invention provides an air-float centrifugal compressor-based automotive air conditioning system, comprising:
an air flotation centrifugal compressor configured to compress a refrigerant;
a condenser in communication with the air flotation centrifugal compressor;
a throttling element in communication with the condenser and the heat exchange device; and
and the heat exchange device is communicated with the throttling element and the air floatation centrifugal compressor.
Further, the air flotation centrifugal compressor includes:
an electric machine, comprising:
the two ends of the interior of the shell are respectively provided with a first cavity and a second cavity; and a rotor on which a radial bearing is provided, the radial bearing being an air bearing and configured to support the rotor in a radial direction;
an impeller disposed at an end of the rotor and located within the first and/or second chambers;
an inlet port in communication with the inlet port of the first chamber;
an exhaust port in communication with an outlet port of the second chamber;
the two ends of the connecting pipe are respectively communicated with the air outlet of the first chamber and the air inlet of the second chamber;
further, the air flotation centrifugal compressor further comprises:
a thrust disk provided at an end of the rotor; and
and the thrust bearing is arranged on one side or two sides of the thrust disc and is an air bearing.
Further, the motor is a high-speed permanent magnet synchronous motor; and/or
The radial bearing is a foil type dynamic pressure air bearing; and/or
The impeller is a closed impeller; and/or
The impeller is fixed at the end part of the rotor through a locking nut; and/or
End covers are further arranged at the air outlets of the first cavity and the second cavity; and/or
A multi-stage impeller is included in the first chamber or the second chamber; and/or
And a sealing structure is arranged on the side of the wheel cover of the impeller.
Further, the air floatation centrifugal compressor also comprises an interstage air supplement port which is arranged on the connecting pipe.
Further, still include:
and the air conditioning pipeline is used for circulating a refrigerant and is connected with the air floatation centrifugal compressor, the condenser, the throttling element and the heat exchange device in series.
Further, the heat exchange device is configured to transfer heat between the refrigerant and air, wherein the heat exchange device includes a first fluid inlet and a first fluid outlet for the refrigerant to flow through, and a second fluid inlet and a second fluid outlet for the air to flow through.
Further, still include:
an electronic fan mounted on the condenser;
a blower in communication with the heat exchange device.
Further, a high-temperature high-pressure gas refrigerant coming out of the air floatation centrifugal compressor is condensed into medium-temperature high-pressure liquid through a condenser, and then is throttled by a throttling element to form low-temperature low-pressure liquid which enters a heat exchange device, and in the heat exchange device, the refrigerant absorbs the heat of air to form low-temperature low-pressure gas which returns to the air floatation centrifugal compressor;
the air blower sucks in air and conveys the air to the heat exchange device, the air absorbs heat by the refrigerant in the heat exchange device, the temperature of the air is reduced to the expected temperature, and then the air is discharged from a second fluid outlet of the heat exchange device.
Further, still include:
the temperature sensor is connected between the first fluid outlet of the heat exchange device and the air inlet of the air floatation centrifugal compressor and/or the air outlet of the air floatation centrifugal compressor and the inlet of the condenser;
and the pressure sensor is connected between the first fluid outlet of the heat exchange device and the air inlet of the air floatation centrifugal compressor and/or the air outlet of the air floatation centrifugal compressor and the inlet of the condenser.
The invention has at least the following beneficial effects: the invention discloses an automobile air conditioning system based on an air flotation centrifugal compressor, which comprises the air flotation centrifugal compressor, a condenser, a throttling element and a heat exchange device, wherein the air flotation centrifugal compressor, the condenser, the throttling element and the heat exchange device are sequentially connected end to end through an air conditioning pipeline to form a circulation loop. The air flotation centrifugal compressor adopts an air flotation bearing, so that oil lubrication is not needed, an oil return pipeline is omitted, and the cost of compressor oil is saved; meanwhile, when the air bearing works, the rotating shaft is not contacted with the bearing, but the motor rotor is suspended by an air film, so that the service life of the bearing can be prolonged by at least 1 time, and the reliability of the compressor and a heat management system is improved; the air bearing is adopted, compressor oil is not used, the heat exchange efficiency of the refrigerant is improved, and the refrigerating capacity of the system is improved by more than 5% compared with that of a traditional system with the compressor oil; compressor oil does not need to be supplemented when parts are maintained and replaced in after-market maintenance; compared with a scroll compressor, the air flotation centrifugal compressor based on the high-speed permanent magnet synchronous motor has the advantages that the volume is reduced by about 30% and the weight is reduced by about 50% under the same cooling capacity, more arrangement space can be saved for a new energy automobile, and the new energy automobile is favorably lightened.
Drawings
To further clarify the above and other advantages and features of embodiments of the present invention, a more particular description of embodiments of the invention will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. In the drawings, the same or corresponding parts will be denoted by the same or similar reference numerals for clarity.
FIG. 1 illustrates a schematic diagram of an air conditioning system based on an air flotation centrifugal compressor according to an embodiment of the present invention; and
FIG. 2 is a schematic view showing the configuration of an air flotation centrifugal compressor according to an embodiment of the present invention;
FIGS. 3a-3d are schematic diagrams illustrating configurations of an air flotation centrifugal compressor according to other embodiments of the present invention, respectively;
FIGS. 4a-4d are schematic diagrams illustrating configurations of different rotor systems in an air-flotation centrifugal compressor according to an embodiment of the present invention, respectively;
FIG. 5 shows a schematic structural diagram of a small-capacity air flotation centrifugal compressor according to an embodiment of the invention; and
fig. 6 shows a schematic cross-sectional view of a small capacity air flotation centrifugal compressor according to an embodiment of the present invention.
Detailed Description
It should be noted that the components in the figures may be exaggerated and not necessarily to scale for illustrative purposes.
In the present invention, the embodiments are only intended to illustrate the aspects of the present invention, and should not be construed as limiting.
In the present invention, the terms "a" and "an" do not exclude the presence of a plurality of elements, unless otherwise specified.
It is further noted herein that in embodiments of the present invention, only a portion of the components or assemblies may be shown for clarity and simplicity, but those of ordinary skill in the art will appreciate that, given the teachings of the present invention, required components or assemblies may be added as needed in a particular scenario.
It is also to be noted here that, within the scope of the present invention, the expressions "identical", "equal" and the like do not mean that the two values are absolutely equal, but allow a certain reasonable error, that is, the expressions also cover "substantially identical", "substantially equal".
It should also be noted herein that in the description of the present invention, the terms "central", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, the embodiments of the present invention describe the process steps in a specific order, however, this is only for convenience of distinguishing the steps, and does not limit the order of the steps.
In the present invention, high temperature > medium temperature > low temperature, high pressure > low pressure.
FIG. 1 shows a schematic diagram of an air flotation centrifugal compressor based automotive air conditioning system according to an embodiment of the invention.
As shown in fig. 1, an air-floating centrifugal compressor-based automotive air conditioning system includes an air conditioning pipeline 10, an air-floating centrifugal compressor 11, a condenser 12, a throttling element 13, and a heat exchange device 14. The air conditioning pipeline 10 is connected in series with an air flotation centrifugal compressor 11, a condenser 12, a throttling element 13 and a heat exchange device 14.
The air conditioning circuit 10 is used to circulate a refrigerant. The air flotation centrifugal compressor 11 is used to compress a refrigerant. The condenser 12 is communicated with the air flotation centrifugal compressor 11 and is used for condensing the refrigerant. The high-temperature high-pressure gas discharged by the air flotation centrifugal compressor 11 is condensed into medium-temperature high-pressure liquid through a condenser. The throttling element 12 is in communication with a condenser 12 and a heat exchange device 14. The throttling element 12 is used for throttling the refrigerant to change the medium-temperature high-pressure refrigerant into the low-temperature low-pressure refrigerant, and the throttling element 12 comprises an electronic expansion valve, a capillary tube, a throttling pipe and the like.
The heat exchanging device 14 is in communication with the air flotation centrifugal compressor 11 and the throttling element 13, and is configured to transfer heat between the refrigerant and the air. In the heat exchange device 14, the refrigerant expanded by throttling absorbs heat in the air, thereby cooling the air. The heat exchange means 14 comprises a first fluid inlet and a first fluid outlet for the flow of refrigerant therethrough and a second fluid inlet and a second fluid outlet for the flow of air therethrough. The heat exchange means 14 comprises an evaporator.
The air-float centrifugal compressor based automobile air-conditioning system also comprises an electronic fan 15 which is arranged on the condenser 12; a blower 16 in communication with the second fluid inlet of the heat exchange device 14.
The automobile air conditioning system based on the air flotation centrifugal compressor further comprises: a temperature sensor 17 connected between the first fluid outlet of the heat exchanging device 14 and the air inlet of the air flotation centrifugal compressor 11 and/or the air outlet of the air flotation centrifugal compressor 11 and the inlet of the condenser 12; and the pressure sensor 18 is connected between the first fluid outlet of the heat exchange device 14 and the air inlet of the air floatation centrifugal compressor 11 and/or the air outlet of the air floatation centrifugal compressor 11 and the inlet of the condenser 12. A temperature sensor 17 detects the temperature of the refrigerant and a pressure sensor 18 detects the pressure of the refrigerant for calculation of the refrigeration demand and protection of the compressor operation.
The connection relationship among the components in the automobile thermal management system is as follows:
an exhaust port of the air flotation centrifugal compressor 11 is communicated with an inlet of the condenser 12; the outlet of the condenser 12 communicates with the inlet of the throttling element 13; the outlet of the throttling element 13 is communicated with the first fluid inlet of the heat exchange device 14, and the first fluid outlet of the heat exchange device 14 is communicated with the air inlet of the air flotation centrifugal compressor 11; the air outlet of the blower 16 is in communication with the second fluid inlet of the heat exchange device 14.
When the automobile air conditioning system based on the air flotation centrifugal compressor works, the air flotation centrifugal compressor 11 serves as a power source of refrigerant circulation, the refrigerant is compressed in a centrifugal mode, the compressed refrigerant is discharged from the air flotation centrifugal compressor 11 in a high-temperature high-pressure gas mode and reaches the condenser 12, the electronic fan 15 sucks air at normal temperature into condenser fins, the condenser 12 exchanges heat between the heat of the high-temperature high-pressure refrigerant inside and the air, the refrigerant is condensed into medium-temperature high-pressure liquid, then the refrigerant enters the throttling element 13, the throttling element 13 throttles the refrigerant, the throttled refrigerant rapidly expands to be low-temperature low-pressure liquid, the low-temperature low-pressure liquid enters the heat exchange device 14, the air is sucked by the air blower 16 and conveyed to the heat exchange device 14, in the heat exchange device 14, the refrigerant absorbs the heat of the air, the refrigerant is changed into low-temperature low-pressure gas, and returns to the air flotation centrifugal compressor 11. The air absorbs heat from the refrigerant in the heat exchange device 14, and the air temperature drops to a desired temperature, exiting the second fluid outlet of the heat exchange device 14. In the heat exchange device 14, the air inflow direction is opposite to the refrigerant inflow direction, and the heat exchange efficiency is improved.
In the embodiment of the present invention, the term "main gas path" refers to a gas flow path through which gas enters the compressor along the gas inlet, is compressed, and then exits the compressor through the gas outlet. The term "high pressure side" refers to the side of the compressor interior where the gas pressure is higher, i.e., the side where the last stage impeller is located, and the term "low pressure side" refers to the side of the compressor interior opposite the high pressure side. Under normal conditions, the gas flows from the high-pressure side to the low-pressure side through the air bearing and then returns to the main gas path.
Fig. 2 and fig. 3a to 3d respectively show the configuration diagrams of the air flotation centrifugal compressor according to different embodiments of the invention. As shown, in an embodiment of the invention, the air flotation centrifugal compressor includes a motor and an impeller 200. The rotor system of the motor comprises a radial air bearing 111, when the rotating shaft of the motor rotates, the radial air bearing sucks gas to form an air film to support the rotor to rotate at a high speed, and meanwhile, the thrust bearing (if any) also forms the air film, so that the thrust rotating shaft is not in contact with the bearing, the bearing is almost free of abrasion, and mechanical loss and noise can be greatly reduced or even eliminated. As shown, an impeller 200 is provided at an end of the rotor 101 for compressing low-temperature and low-pressure refrigerant gas from the evaporator to form high-temperature and high-pressure refrigerant gas, which is discharged into the condenser. Herein, the terms "radial" and "axial" refer to both radial and axial directions of the rotor or its rotational axis.
Fig. 4a to 4d are schematic diagrams respectively illustrating configurations of different rotor systems in the air-flotation centrifugal compressor according to the embodiment of the invention. As shown, in the embodiment of the present invention, two radial bearings are included in the rotor system 101, and a certain distance exists between the two radial bearings, and the two radial bearings can be symmetrically distributed on the rotor. In one embodiment of the present invention, the radial bearing is a foil type dynamic pressure gas bearing, when gas is introduced into the bearing position, a gas film is formed, and thus a gas floating effect is achieved.
In order to withstand the axial thrust generated during operation of the compressor, in one embodiment of the invention, a thrust disc 112 and a thrust bearing 113 are also provided in the rotor system. Thrust disc 112 and thrust bearing 113 are optional. As shown in fig. 4a-4d, the thrust disk 112 may be disposed at either end of the rotor, or one thrust disk 112 may be disposed at each end of the rotor. When only one thrust disk is provided, one thrust bearing 113 may be provided on each side of the thrust disk 112, as shown in the figure, the active surface of each of the two thrust bearings 113 faces the thrust disk 112, so that the axial thrust in different directions can be borne by the two thrust bearings 113, specifically, the axial thrust directions that the two thrust bearings 113 can bear are opposite. When two thrust disks are provided, one thrust bearing 113 may be disposed on two opposite sides of the two thrust disks 112, or on two sides away from the two thrust disks 112, as shown in the figure, the active surfaces of the two thrust bearings 113 both face the thrust disks 112, and thus may respectively bear axial thrust in different directions, specifically, the axial thrust directions that the two thrust bearings 113 can bear are opposite. In one embodiment of the present invention, the thrust bearing is a foil type dynamic pressure gas bearing, when gas is introduced into the bearing position, a gas film is formed, thereby achieving a gas floating effect.
As shown in fig. 2 and fig. 3a-3d, in different embodiments of the present invention, a single-stage, double-stage or multi-stage impeller can be provided according to actual requirements. Specifically, when only a single-stage impeller is provided, as shown in fig. 2 and 3a, the impeller 200 may be provided at either end of the rotor, and the side where the impeller is provided may be referred to as a high-pressure side, while the side where the impeller is not provided may be referred to as a low-pressure side. When two-stage impellers are provided, as shown in fig. 3b and 3c, the two impellers may be provided at both ends of the rotor, or may be provided at both ends of the rotor, respectively, a side provided with the previous-stage impeller may be referred to as a low-pressure side, and a side provided with the subsequent-stage impeller may be referred to as a high-pressure side, and when all of the impellers are provided at one end of the rotor, a side provided with the impellers may be referred to as a high-pressure side, and a side not provided with the impellers may be referred to as a low-pressure side. Similarly, as shown in fig. 3d, when a plurality of stages of impellers are provided, the plurality of impellers may be disposed at both ends of the rotor, respectively, equally or unequally, or may be disposed at all ends of the rotor, and when disposed at both ends of the rotor, a side where a previous stage of impeller is disposed may be referred to as a low pressure side, and a side where a next stage of impeller is disposed may be referred to as a high pressure side, and when disposed at all ends of the rotor, a side where an impeller is disposed may be referred to as a high pressure side, and a side where no impeller is disposed may be referred to as a low pressure side. Based on this, as shown in fig. 2 and 3a-3d, when the rotor rotates, a part of the high pressure gas compressed by the impeller in the main gas path enters the radial bearing at the high pressure side under pressure, then enters the radial bearing at the low pressure side through the air gap between the stator and the rotor of the motor, and returns to the main gas path. When the thrust disc and the thrust bearing are arranged, high-pressure gas can form a gas film through the thrust bearing to bear axial thrust. In order to effectively reduce the axial thrust received by the thrust bearing, in an embodiment of the present invention, the impeller on the low pressure side and the impeller on the high pressure side are arranged back to back, so that the axial thrust directions of the impellers on the high pressure side and the low pressure side are opposite to each other to cancel each other. In one embodiment of the invention, the impeller is a shrouded impeller. In one embodiment of the invention, the impeller is secured to the rotor by a lock nut.
The specific structure and operation principle of the air flotation centrifugal compressor in the embodiment of the present invention will be described in detail by taking the configuration shown in fig. 3b as an example. It should be understood that the structure and the operation principle of the air-float centrifugal compressor adopting other configurations are basically the same as the embodiment, and the differences are only the number and the positions of the impellers and/or the number and the positions of the thrust discs, which are not described in detail herein. The air flotation centrifugal compressor in the embodiment is suitable for heat management and is a small-cooling capacity air flotation centrifugal compressor.
Fig. 5 and fig. 6 respectively show a schematic structural view and a schematic cross-sectional view of a small-capacity air flotation centrifugal compressor according to an embodiment of the present invention. As shown in the figure, the small-capacity air flotation centrifugal compressor comprises a motor 100, an impeller, an air inlet 301, an air outlet 302 and a connecting pipe 303.
The motor 100 includes a rotor 101, a stator 102, and a housing 103. The stator 102 is fixed inside the housing 103, and the center axis of the rotor 101 coincides with the center axis of the stator 102. Two radial air bearings 111 are arranged on the rotor 101, a thrust disc 112 is arranged on one side close to the air inlet 301, two air-floating thrust bearings 113 are respectively arranged on two sides of the thrust disc, and the two thrust bearings are oppositely arranged to respectively bear axial thrust directed to a low-pressure side or a high-pressure side.
As shown in the figure, a first chamber and a second chamber are respectively disposed at two ends of the interior of the housing 103. The air inlet of the first cavity is communicated with the air inlet 301 of the compressor, and it can also be understood that the air inlet 301 is the air inlet of the first cavity, a first impeller 201 is arranged in the first cavity, and the first impeller 201 is fixed at the first end of the rotor 101. A connecting pipe 303 is arranged between the first chamber and the second chamber, and the gas compressed by the first impeller 201 flows out of the gas outlet of the first chamber, enters the connecting pipe 303, and then enters the second chamber through the gas inlet of the second chamber. The second impeller 202 is arranged in the second chamber, the second impeller 202 is fixed to the second end of the rotor 101, most of the gas compressed by the second impeller 202 flows out of the gas outlet of the second chamber, the gas outlet of the second chamber is communicated with the gas outlet 302 of the compressor, and it can also be understood that the gas outlet 302 is the gas outlet of the second chamber. As shown in the drawings, in the embodiment of the present invention, the air outlets of the first chamber and the second chamber are further respectively provided with a first end cover 135 and a second end cover 136, gaps exist between the first end cover 135 and the rotor 101, a certain gap exists between the first end cover 135 and the first impeller 201, the air flowing through the air bearing can return to the main air passage through the gap, a certain gap also exists between the second end cover 136 and the second impeller 202, and a part of the air compressed by the second impeller 202 can enter the air bearing through the gap under the pressure effect. In an embodiment of the present invention, the first impeller 201 and the second impeller 202 both adopt a shrouded impeller, and compared with an open impeller, the shrouded impeller can effectively eliminate secondary flow from a pressure surface to a suction surface of a blade caused by a blade tip clearance, so as to effectively improve the pneumatic efficiency of the compressor. In an embodiment of the present invention, as shown above, the first impeller 201 and the second impeller 202 are designed back-to-back, so that the axial thrust directions of the first impeller and the second impeller are opposite to each other and cancel each other out, thereby effectively reducing the axial thrust received by the thrust bearing. In one embodiment of the present invention, the first impeller 201 and the second impeller 202 are fixed to the rotor 101 by a first lock nut 211 and a second lock nut 221, respectively.
As shown in the figure, the outer sides of the two ends of the motor are respectively provided with a first pressure shell 131 and a second pressure shell 132, a first sealing ring 133 is arranged between the first pressure shell 131 and the first impeller 201, and a second sealing ring 134 is arranged between the second pressure shell 132 and the second impeller 202, so that the backflow effect from the outlet to the inlet of the first impeller and the backflow effect from the outlet to the inlet of the second impeller can be obviously reduced by the first sealing ring and the second sealing ring, and the efficiency of the compressor can be further improved.
In order to reduce the compression power consumption of the second impeller 202, in an embodiment of the present invention, an inter-stage air supplement hole 331 is further disposed on the connection pipe 303 to receive exhaust from the economizer, and cool the gas compressed by the first impeller, thereby achieving the purposes of reducing the compression power consumption of the high-pressure impeller and improving the efficiency of the system.
In an embodiment of the present invention, the motor 100 is a high-speed permanent magnet synchronous motor, and the bearing is a non-contact bearing during operation, so that the motor can bear a higher rotation speed than a common ball bearing, and Δ h = U according to the euler formula of the compressor 2 Cu 2 -U 1 Cu 1 Therefore, the larger the rotating speed of the compressor with the same work capacity is, the smaller the radial size is, and therefore the power density of the compressor can be improved by adopting the permanent magnet synchronous motor.
The working principle of the air flotation centrifugal compressor is as follows: the gas compressed by the second impeller enters the second radial bearing at the high-pressure side through the gap between the second impeller and the second end cover and the gap between the second end cover and the rotor, then enters the first radial bearing at the low-pressure side through the air gap between the stator and the rotor, then sequentially passes through the two thrust bearings through the gap between the thrust disc and the motor shell and the gap between the thrust disc and the first end cover, and finally sequentially passes through the gap between the first end cover and the rotor and the gap between the first impeller and the first end cover to enter the first cavity, namely the exhaust port of the first impeller returns to the main gas circuit to realize internal circulation. Compared with a static pressure air-float bearing, the air-float centrifugal compressor can omit an external air-supply channel, simplify the system structure and improve the reliability.
Although some embodiments of the present invention have been described herein, it will be understood by those skilled in the art that these embodiments are shown by way of example only. Numerous variations, substitutions and modifications will occur to those skilled in the art in light of the teachings of the present invention without departing from the scope thereof. It is intended that the following claims define the scope of the invention and that methods and structures within the scope of these claims and their equivalents be covered thereby.
Claims (10)
1. An automobile air conditioning system based on an air flotation centrifugal compressor is characterized by comprising:
an air flotation centrifugal compressor configured to compress a refrigerant;
the condenser is communicated with the air floatation centrifugal compressor;
a throttling element in communication with the condenser and the heat exchange device; and
and the heat exchange device is communicated with the throttling element and the air floatation centrifugal compressor.
2. The air-flotation centrifugal compressor-based automotive air conditioning system as claimed in claim 1, wherein the air-flotation centrifugal compressor comprises:
an electric machine, comprising:
the two ends of the interior of the shell are respectively provided with a first cavity and a second cavity; and
a rotor on which a radial bearing is provided, the radial bearing being an air bearing and configured to support the rotor in a radial direction;
an impeller disposed at an end of the rotor and located within the first and/or second chamber;
an inlet port in communication with the inlet port of the first chamber;
an exhaust port in communication with an outlet port of the second chamber;
and two ends of the connecting pipe are respectively communicated with the air outlet of the first chamber and the air inlet of the second chamber.
3. The air-flotation centrifugal compressor-based automotive air conditioning system as claimed in claim 2, wherein the air-flotation centrifugal compressor further comprises:
a thrust disk provided at an end of the rotor; and
and the thrust bearing is arranged on one side or two sides of the thrust disc and is an air bearing.
4. The air-flotation centrifugal compressor-based automobile air conditioning system according to claim 2, wherein the motor is a high-speed permanent magnet synchronous motor; and/or
The radial bearing is a foil type dynamic pressure air bearing; and/or
The impeller is a closed impeller; and/or
The impeller is fixed at the end part of the rotor through a locking nut; and/or
End covers are further arranged at the air outlets of the first cavity and the second cavity; and/or
A multi-stage impeller is included in the first chamber or the second chamber; and/or
And a sealing structure is arranged on the side of the wheel cover of the impeller.
5. The air flotation centrifugal compressor based automobile air conditioning system as claimed in claim 2, wherein the air flotation centrifugal compressor further comprises an inter-stage air supplement port, and the inter-stage air supplement port is disposed on the connecting pipe.
6. The air-flotation centrifugal compressor-based automotive air conditioning system according to claim 2, further comprising:
and the air conditioning pipeline is used for circulating a refrigerant and is connected with the air floatation centrifugal compressor, the condenser, the throttling element and the heat exchange device in series.
7. The air-flotation centrifugal compressor-based automotive air conditioning system according to claim 1, wherein the heat exchange device is configured to transfer heat between refrigerant and air, wherein the heat exchange device comprises a first fluid inlet and a first fluid outlet for the refrigerant to flow through, and a second fluid inlet and a second fluid outlet for the air to flow through.
8. The air-flotation centrifugal compressor-based automotive air conditioning system according to claim 7, further comprising:
an electronic fan mounted on the condenser;
and the blower is communicated with the heat exchange device.
9. The air-flotation centrifugal compressor-based automobile air conditioning system according to claim 8, wherein a high-temperature high-pressure gas refrigerant coming out of the air-flotation centrifugal compressor is condensed into a medium-temperature high-pressure liquid through a condenser, and then is throttled by a throttling element to become a low-temperature low-pressure liquid, and the low-temperature low-pressure liquid enters a heat exchange device, and in the heat exchange device, the refrigerant absorbs heat of air to become a low-temperature low-pressure gas, and the low-temperature low-pressure gas returns to the air-flotation centrifugal compressor;
the air blower sucks in air and conveys the air to the heat exchange device, the air absorbs heat by the refrigerant in the heat exchange device, the temperature of the air is reduced to the expected temperature, and then the air is discharged from a second fluid outlet of the heat exchange device.
10. The air-flotation centrifugal compressor-based automotive air conditioning system according to claim 7, further comprising:
the temperature sensor is connected between the first fluid outlet of the heat exchange device and the air inlet of the air floatation centrifugal compressor and/or the air outlet of the air floatation centrifugal compressor and the inlet of the condenser;
and the pressure sensor is connected between the first fluid outlet of the heat exchange device and the air inlet of the air floatation centrifugal compressor and/or the air outlet of the air floatation centrifugal compressor and the inlet of the condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211696443.XA CN115891583A (en) | 2022-12-28 | 2022-12-28 | Automobile air conditioning system based on air flotation centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211696443.XA CN115891583A (en) | 2022-12-28 | 2022-12-28 | Automobile air conditioning system based on air flotation centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115891583A true CN115891583A (en) | 2023-04-04 |
Family
ID=86496316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211696443.XA Pending CN115891583A (en) | 2022-12-28 | 2022-12-28 | Automobile air conditioning system based on air flotation centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115891583A (en) |
-
2022
- 2022-12-28 CN CN202211696443.XA patent/CN115891583A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1961972A2 (en) | Two-stage vapor cycle compressor | |
| JP5014880B2 (en) | Single screw multistage compressor and refrigeration / cooling system using the same | |
| US20210239118A1 (en) | Horizontal rotary compressor with enhanced tiltability during operation and other performance metrics | |
| CN219607444U (en) | Distributed control system | |
| CN219412959U (en) | Automobile air conditioner based on air-floating centrifugal compressor | |
| CN115891583A (en) | Automobile air conditioning system based on air flotation centrifugal compressor | |
| CN218906851U (en) | Automobile thermal management device based on air-floatation centrifugal compressor | |
| CN116007214A (en) | Energy storage heat management system of centrifugal compressor | |
| CN219413028U (en) | Cooling device based on air supporting centrifugal compressor | |
| CN116176226A (en) | Automobile thermal management system based on air-floatation centrifugal compressor | |
| CN219160655U (en) | Multi-water source parallel energy storage thermal management system | |
| CN218934768U (en) | Small-cooling-capacity air-floatation centrifugal compressor for energy storage heat management | |
| CN219067999U (en) | Rotor system for centrifugal compressor and permanent magnet synchronous motor | |
| CN111486103B (en) | Centrifugal compressor and heat pump system | |
| CN113898596A (en) | Multistage centrifugal compressor | |
| CN219163497U (en) | Thermal management system with cold storage structure | |
| CN219163502U (en) | Integrated energy storage thermal management system with double refrigeration modules | |
| CN115966804A (en) | Multi-water-source parallel energy storage and heat management system based on air flotation centrifugal compressor | |
| CN219191867U (en) | Cold storage type automobile heat management device based on air floatation centrifugal compressor | |
| CN218817171U (en) | Air-float centrifugal compressor energy storage heat management device | |
| CN115962591A (en) | Heat management system with cold storage structure based on air flotation centrifugal compressor | |
| CN219163506U (en) | Heat management system of direct-cooling type energy storage battery | |
| CN116123743A (en) | Energy storage thermal management system based on air supporting centrifugal compressor | |
| CN117006067A (en) | Air-floating centrifugal compressor | |
| CN218817170U (en) | Energy storage and heat management device of centrifugal compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |