CN216812148U - Screw compressor and air conditioning equipment - Google Patents
Screw compressor and air conditioning equipment Download PDFInfo
- Publication number
- CN216812148U CN216812148U CN202220302141.9U CN202220302141U CN216812148U CN 216812148 U CN216812148 U CN 216812148U CN 202220302141 U CN202220302141 U CN 202220302141U CN 216812148 U CN216812148 U CN 216812148U
- Authority
- CN
- China
- Prior art keywords
- slide valve
- air outlet
- pressure
- screw compressor
- exhaust
- 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.)
- Active
Links
Images
Abstract
The present disclosure relates to a screw compressor and an air conditioning apparatus. Wherein, screw compressor includes: a body and a spool; the exhaust end of the slide valve is provided with a first exhaust port, and the exhaust end of the body in the slide valve cavity is provided with a second exhaust port. The air outlet is formed in the machine body while the slide valve is provided with the air outlet, and the first air outlet and the second air outlet are communicated under the initial state that the air outlet end of the slide valve slides to the air outlet end of the slide valve cavity, so that the initial air outlet area of the air outlet is increased, the flow loss at the initial air outlet stage is reduced, and the power consumption of the compressor is reduced. The control method comprises the steps that a slide valve is moved to change the position of an exhaust port of the slide valve, the final pressure of internal compression is equal to the condensing pressure, and then the tooth space pressure at the tail section of the exhaust process is equal to the condensing pressure, so that the compressor is in high-efficiency operation; meanwhile, the pressures of the monitoring points of the slide valve at different positions are compared, whether the slide valve normally moves is judged, the locking fault of the slide valve is found in time, and long-term low-efficiency operation of equipment is avoided.
Description
Technical Field
The present disclosure relates to a screw compressor and an air conditioning apparatus.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The vapor compression type refrigerating system mainly comprises four parts, namely an evaporator, a condenser, a throttling element and a refrigerating compressor. The refrigerant is boiled and evaporated in the evaporator to form refrigerant vapor, the refrigeration compressor sucks low-pressure refrigerant vapor from the evaporator, high-pressure gas is formed after compression and is discharged into the condenser, the high-pressure gas is subjected to heat exchange and condensation with the outside in the condenser to form high-pressure liquid, the low-pressure gas-liquid two-phase refrigerant is formed through the heat insulation and pressure reduction process of the throttling element and enters the evaporator, the low-pressure gas-liquid two-phase refrigerant is boiled and evaporated in the evaporator again, and the refrigeration cycle is realized. In a refrigeration system, the compressor assumes the duty of raising the refrigerant vapor pressure and delivering refrigerant, and is the heart and sole source of power for the refrigeration compression system.
The screw compressor is one of positive displacement compressors, has internal compression and forced gas transmission characteristics, and is characterized in that a pair of female rotors and male rotors with spiral characteristics are mutually matched to form a closed cavity, and the closed cavity is periodically reduced and enlarged along with the rotation motion of the rotors, so that the purposes of gas suction, compression and gas exhaust are achieved.
By means of a suitable design, the tooth space volume V is setsAt maximum, the gullet volume is disengaged from the suction channel and the suction process is complete. As the rotor continues to rotate, the enclosed volume gradually decreases and the refrigerant vapor pressure in the volume is continually raised. When the refrigerant vapor pressure risesAt a certain value, the closed volume V at this timedCommunicated with the exhaust port and enters an exhaust process. Steam pressure P of interdental space before the enclosed space communicates with the exhaust portiThe ratio of the final pressure of the internal compression to the suction pressure is the internal pressure ratio, and the gas pressure P in the exhaust pipedReferred to as the external or back pressure, and its ratio to the inspiratory pressure is referred to as the external pressure ratio.
The position and shape of the suction and exhaust ports of the screw compressor determine the internal pressure ratio, the suction and exhaust pressures required by the operating condition and the external pressure ratio. When the internal compression is finished, unnecessary energy waste occurs when the pressure in the compression cavity is higher than (over-compression phenomenon) or lower than the exhaust pressure (under-compression phenomenon), so that the matching of the internal pressure ratio and the external pressure ratio is very important.
When the system operates under different working conditions, the position of an exhaust port of the compressor needs to be adjusted timely to exhaust in advance or in a delayed mode, namely the internal compression stroke of the rotor is changed, the final compression pressure is equal to the exhaust pressure, unnecessary energy waste is avoided, and therefore the system efficiency is improved.
At the initial stage of communicating the exhaust port, the area of the exhaust port is small, and the gas in the inter-tooth volume cannot flow into the exhaust cavity in time, so that the internal pressure of the inter-tooth volume is continuously increased, and more energy loss is caused.
When the compressor adopts the internal volume ratio to adjust the slide valve and adjusts the position of the compressor exhaust port, the slide valve is usually provided with an exhaust port which is limited by the size of the slide valve, and the exhaust port cannot extend to the area of a rotor cavity of a machine body, so that the area of a radial exhaust port is reduced when the compressor exhausts, the throttling loss and the flow loss in the exhaust process are increased, and the power consumption of the compressor is correspondingly increased.
When the compressor operates under different working conditions, the position of the exhaust port is advanced by adjusting the slide valve according to the internal volume ratio, so that the pressure at the end of internal compression is equal to the exhaust pressure, but in the initial stage of exhaust, the area of the exhaust port is small, the exhaust duration is prolonged, the phenomenon of inter-tooth volume boosting is obvious, and the power consumption of the compressor is correspondingly increased.
In addition, because the actual operation state of the inner volume adjusting slide valve is difficult to monitor in real time, if the mechanism for driving the inner volume adjusting slide valve fails, the failure cannot be fed back immediately, and the compressor operates inefficiently for a long time.
Disclosure of Invention
One technical problem to be solved by the present disclosure is: provided are a screw compressor and an air conditioning device, which can reduce the power consumption of the compressor.
Some embodiments of the present disclosure provide a screw compressor, including: the slide valve is arranged in a slide valve cavity of the machine body in a sliding way along the axial direction of the screw compressor; the air outlet end of the slide valve is provided with a first air outlet, the machine body is provided with a second air outlet at the air outlet end of the slide valve cavity, and the first air outlet and the second air outlet can be communicated to increase the air outlet area of the screw compressor under the condition that the air outlet end of the slide valve slides to the air outlet end of the slide valve cavity.
In some embodiments, the second gas outlet is configured to extend in a radial direction of the screw compressor.
In some embodiments, the second exhaust port is divergent in the axial direction along the exhaust direction.
In some embodiments, the first exhaust port is divergent in the exhaust direction in the axial direction.
In some embodiments, the first exhaust port and the second exhaust port can be open to form a V-shaped exhaust port with an exhaust area that diverges in the exhaust direction.
In some embodiments, the screw machine further comprises a male screw rotor and a female screw rotor which are arranged in a rotor cavity of the machine body and meshed with each other, and the rotor cavity is communicated with the sliding valve cavity.
In some embodiments, further comprising a first pressure sensor configured to detect an internal compression end pressure P1 of the screw compressor and a second pressure sensor configured to detect a discharge process end stage tooth space pressure P2.
In some embodiments, the working surface of the slide valve is provided with a slide valve pressure guide hole, the slide valve pressure guide hole is communicated with the pressure detection channel of the first pressure sensor, and the slide valve pressure guide hole is positioned at the position of the rotor tooth groove before the first exhaust port.
In some embodiments, a slide valve pressure guide groove communicated with the slide valve pressure guide hole is formed in the working surface of the slide valve, the pressure detection channel of the first pressure sensor is formed in the machine body, and the slide valve pressure guide hole can be always communicated with the pressure detection channel of the first pressure sensor through the slide valve pressure guide groove in the sliding process of the slide valve.
In some embodiments, the pressure sensing passage of the second pressure sensor communicates with the second exhaust port.
Some embodiments of the present disclosure provide an air conditioning apparatus including the aforementioned screw compressor.
According to the compressor, the air outlet is formed in the machine body while the slide valve is provided with the air outlet, and the first air outlet and the second air outlet are communicated under the initial state that the air outlet end of the slide valve slides to the air outlet end of the slide valve cavity, so that the air outlet area of the air outlet at the initial stage is increased, the flow loss of the air outlet at the initial stage is reduced, and the power consumption of the compressor is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic overall structural view of some embodiments of a screw compressor package according to the present disclosure;
FIG. 2 is a schematic view of the configuration of slide valves in some embodiments of a screw compressor according to the present disclosure;
FIG. 3 is a schematic structural view of some embodiments of a screw compressor according to the present disclosure at the initial stage of venting;
FIG. 4 is a schematic illustration of the internal structure of a screw compressor according to some embodiments of the present disclosure during the initial phase of venting;
FIG. 5 is a schematic view of the internal structure of a screw compressor according to the present disclosure with the slide valve away from the discharge end;
FIG. 6 is a schematic overall structural view of some embodiments of screw compressors according to the present disclosure.
Description of the reference numerals
1. A screw male rotor; 2. a screw female rotor; 3. a body; 4. a spool valve; 5. a second pressure sensor; 6. a first pressure sensor; 7. a drive motor; 8. a slide valve drive mechanism; 31. a second exhaust port; 41. a slide valve pressure guide hole; 42. a slide valve pressure guide groove; 43. a valve body; 44. a first exhaust port.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, the particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.
All terms used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
As shown in fig. 1 to 5 in combination, some embodiments of the present disclosure provide a screw compressor including: the screw rod male rotor 1, the screw rod female rotor 2, the machine body 3 and the slide valve 4, wherein the screw rod male rotor 1 and the screw rod female rotor 2 are arranged in a rotor cavity of the machine body 3 and are meshed with each other, the slide valve 4 is axially slidably arranged in a slide valve cavity of the machine body 3, and the rotor cavity is communicated with the slide valve cavity. The exhaust end of the slide valve 4 is provided with a first exhaust port 44, the machine body 3 is provided with a second exhaust port 31 at the exhaust end of the slide valve cavity, and the first exhaust port 44 and the second exhaust port 31 can be communicated to increase the exhaust port area of the screw compressor under the condition that the exhaust end of the slide valve 4 slides to the exhaust end of the slide valve cavity.
In the exemplary embodiment, the second exhaust port 31 is also provided in the body 3 at the same time as the first exhaust port 44 is opened in the slide valve 4, and as shown in fig. 3 and 4, in an initial state where the exhaust end of the slide valve 4 slides to the exhaust end of the slide valve chamber, the first exhaust port 44 and the second exhaust port 31 are communicated, so that the exhaust port of the slide valve 4 can extend to the body 3, thereby increasing the exhaust area a at the initial stage of the exhaust port, reducing the throttling loss caused by the small area at the initial stage of the exhaust opening, and reducing the power consumption of the compressor.
Referring to fig. 1 to 6, in some embodiments, the screw compressor further includes a driving motor 7 and a slide valve driving mechanism 8, the slide valve driving mechanism is embodied as a piston, the body 3 is provided with a suction cavity, a rotor cavity and an exhaust cavity, the screw rotor and the rotor cavity form a closed inter-tooth volume, the screw male rotor 1 is a screw rotor having a "convex" shape, the screw female rotor 2 is a screw rotor having a "concave" shape, the driving motor is connected with the screw male rotor 1 and performs a rotation motion, and the screw male rotor 1 drives the screw female rotor 2 to perform a meshing motion; on one side of the rotor, refrigerant steam from an upstream evaporator is sucked through the continuous expansion of the inter-tooth volume, on the other side of the rotor, a driving motor drives the inter-tooth volume of the male and female rotors to be continuously reduced and forcibly compresses the refrigerant steam entering the inter-tooth volume, the pressure of the refrigerant steam is continuously increased, and when the refrigerant steam pressure is increased to a certain value, the refrigerant steam is communicated with a shell exhaust channel and is exhausted out of the tooth grooves of the screw rotors and is exhausted to a downstream condenser.
As shown in fig. 1, a spool chamber is simultaneously arranged in the rotor chamber, the spool 4 having a "V" shape can perform an axial forward and backward linear motion along the spool chamber, and the spool 4 has a certain moving range, as shown in fig. 3 and 4, the closer the first exhaust port 44 of the spool 4 is to the exhaust end face of the rotor, the longer the internal compression stroke is, the higher the pressure at the end of the internal compression is, and conversely, as shown in fig. 5, the farther the first exhaust port 44 is from the exhaust end face, the shorter the internal compression stroke is, the lower the pressure at the end of the internal compression is. Meanwhile, the body 3 is also provided with a second exhaust port 31, the position of the second exhaust port 31 is overlapped with the first exhaust port 44 when the slide valve 4 is closest to the exhaust end, and when the compressor exhausts at the position, the exhaust area is increased in the initial stage of the exhaust, so that the exhaust resistance loss can be reduced.
As shown in fig. 4 and 5, in some embodiments, the second gas outlet 31 is configured to extend along the radial direction of the screw compressor, which is beneficial to increase the gas outlet area a in the early stage of the gas outlet, and is convenient for processing and has high feasibility of implementation.
As shown in fig. 4 and 5, in some embodiments, the second exhaust port 31 is tapered along the exhaust direction in the axial direction, which is beneficial to increase the initial exhaust area a of the exhaust port, and is easy to process and highly practical.
In some embodiments, as shown in FIGS. 3-5, the first exhaust port 44 is axially divergent along the exhaust direction to increase the initial exhaust area A of the exhaust port.
As shown in fig. 3 and 4, in some embodiments, the first exhaust port 44 and the second exhaust port 31 can be communicated to form a V-shaped exhaust port with the exhaust area gradually expanding along the exhaust direction, thereby increasing the exhaust area to reduce the exhaust resistance loss.
In some embodiments, the screw compressor further comprises a first pressure sensor 6 and a second pressure sensor 5, the first pressure sensor 6 is configured to detect an internal compression end pressure P1 of the screw compressor, and the second pressure sensor 5 is configured to detect an exhaust process end section cogging pressure P2, so that the internal compression end pressure P1 and the exhaust process end section cogging pressure P2 of the screw compressor can be monitored in real time, so as to control the moving position of the slide valve 4 in the slide valve cavity in time.
As to how the first pressure sensor 6 detects the internal compression end pressure P1 of the screw compressor, in some embodiments, as shown in fig. 1 to 5, a slide valve pressure guide hole 41 is provided on the working surface of the slide valve 4, the slide valve pressure guide hole 41 communicates with the pressure detection passage of the first pressure sensor 6, and the slide valve pressure guide hole 41 is located at the rotor tooth slot before the first exhaust port 44.
For convenience of detection, as shown in fig. 2, in some embodiments, a spool pressure guide groove 42 communicating with a spool pressure guide hole 41 is provided on the working surface of the spool 4, the spool pressure guide groove 42 extends in the axial direction of the spool 4, a pressure detection channel of the first pressure sensor 6 is formed in the body 3, and the spool pressure guide hole 41 can always communicate with the pressure detection channel of the first pressure sensor 6 through the spool pressure guide groove 42 during sliding of the spool 4, so as to ensure detection accuracy.
In other embodiments, the pressure detection passage of the first pressure sensor 6 is formed in the valve body 43 of the slide valve 4 and communicates with the slide valve pilot pressure hole 41 on the working face of the slide valve 4, and the detection of the internal compression end pressure P1 of the screw compressor by the first pressure sensor 6 can also be realized.
With respect to how the second pressure sensor 5 detects the end of the bleed process cogging pressure P2, in some embodiments, as shown in fig. 5, the pressure sensing passage of the second pressure sensor 5 communicates with the second vent port 31.
Accordingly, some embodiments of the present disclosure provide a control method, applied to control the aforementioned screw compressor, including:
moving the slide valve 4 to change the position of the exhaust port of the slide valve 4 so that the internal compression end pressure P1 detected by the first pressure sensor 6 corresponds to the condensation pressure Pc; then, the slide valve 4 is moved to change the position of the exhaust port of the slide valve 4 so that the cogging pressure P2 at the end of the exhaust process detected by the second pressure sensor 5 corresponds to the condensing pressure Pc.
By using the control method, when the internal volume ratio is changed to work, the position of the slide valve 4 is controlled by simultaneously monitoring the internal compression final pressure P1 and the exhaust process end section tooth space pressure P2, the position of the slide valve exhaust port is properly advanced, at the moment, the compressor has no over/under compression phenomenon, the rise amplitude of the exhaust process end section tooth space pressure is reduced, the power loss is reduced, and the compressor is enabled to run efficiently.
The sliding valve is a moving part in the working process, if the sliding valve is stuck and does not move, the failure phenomenon is not easy to find in time, and the compressor runs in a low-efficiency area for a long time. Based on this, some embodiments of the present disclosure provide a control method, applied to control the aforementioned screw compressor, including: after a command to move the spool 4 is issued, if the internal compression end pressure P1 detected by the first pressure sensor 6 is not changed, a spool movement failure warning message is issued.
By using the control method, the position of the slide valve 4 is adjusted, the compression end pressure in the tooth grooves at different positions is read, the numerical values are compared, whether the slide valve normally moves or not is judged, whether the slide valve normally works or not is monitored, and the running reliability of the compressor is improved.
Some embodiments of the present disclosure provide an air conditioning apparatus including the aforementioned screw compressor. The air conditioning equipment has the beneficial technical effects correspondingly.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (11)
1. A screw compressor, comprising:
a body (3); and
the slide valve (4) is arranged in a slide valve cavity of the machine body (3) in a sliding way along the axial direction of the screw compressor;
the air outlet end of the slide valve (4) is provided with a first air outlet (44), the machine body (3) is provided with a second air outlet (31) at the air outlet end of the slide valve cavity, and the first air outlet (44) and the second air outlet (31) can be communicated to increase the air outlet area of the screw compressor under the condition that the air outlet end of the slide valve (4) slides to the air outlet end of the slide valve cavity.
2. -screw compressor according to claim 1, characterised in that the second discharge opening (31) is configured to extend in the radial direction of the screw compressor.
3. -screw compressor according to claim 1, characterised in that the second discharge opening (31) is divergent in the axial direction along the discharge direction.
4. -screw compressor according to claim 3, characterised in that the first exhaust port (44) is divergent in the axial direction in the exhaust direction.
5. Screw compressor according to claim 4, characterised in that the first discharge opening (44) and the second discharge opening (31) can be connected to form a V-shaped discharge opening with a discharge area diverging in the discharge direction.
6. -screw compressor according to claim 1, characterised in that it also comprises a male screw rotor (1) and a female screw rotor (2) which are arranged in a rotor cavity of the body (3) in engagement with each other, said rotor cavities communicating with the slide valve cavity.
7. The screw compressor according to claim 6, further comprising a first pressure sensor (6) and a second pressure sensor (5), the first pressure sensor (6) being configured to detect an inner compression end pressure P1 of the screw compressor, the second pressure sensor (5) being configured to detect a discharge process end section cogging pressure P2.
8. The screw compressor according to claim 7, wherein a slide valve pressure guide hole (41) is formed in the working surface of the slide valve (4), the slide valve pressure guide hole (41) is communicated with the pressure detection passage of the first pressure sensor (6), and the slide valve pressure guide hole (41) is positioned at a rotor tooth groove before the first exhaust port (44).
9. The screw compressor according to claim 8, wherein a slide valve pressure guide groove (42) communicating with the slide valve pressure guide hole (41) is provided on a working surface of the slide valve (4), a pressure detection passage of the first pressure sensor (6) is formed in the body (3), and the slide valve pressure guide hole (41) can always communicate with the pressure detection passage of the first pressure sensor (6) through the slide valve pressure guide groove (42) during the sliding of the slide valve (4).
10. -screw compressor according to claim 7, characterised in that the pressure detection channel of the second pressure sensor (5) communicates with the second discharge opening (31).
11. An air conditioning apparatus comprising the screw compressor according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220302141.9U CN216812148U (en) | 2022-02-15 | 2022-02-15 | Screw compressor and air conditioning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220302141.9U CN216812148U (en) | 2022-02-15 | 2022-02-15 | Screw compressor and air conditioning equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216812148U true CN216812148U (en) | 2022-06-24 |
Family
ID=82041312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220302141.9U Active CN216812148U (en) | 2022-02-15 | 2022-02-15 | Screw compressor and air conditioning equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216812148U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352523A (en) * | 2022-02-15 | 2022-04-15 | 珠海格力电器股份有限公司 | Screw compressor, control method thereof and air conditioning equipment |
-
2022
- 2022-02-15 CN CN202220302141.9U patent/CN216812148U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352523A (en) * | 2022-02-15 | 2022-04-15 | 珠海格力电器股份有限公司 | Screw compressor, control method thereof and air conditioning equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100826755B1 (en) | Displacement type expansion machine and fluid machine | |
| US9169840B2 (en) | Piston operated bypass valve for a screw compressor | |
| WO2019091104A1 (en) | Variable-capacity control structure, compressor and variable-capacity control method therefor | |
| CN216812148U (en) | Screw compressor and air conditioning equipment | |
| WO2013146674A1 (en) | Two-stage compression device | |
| EP3199814B1 (en) | Screw compressor and refrigeration cycle device | |
| JP5881403B2 (en) | Screw compressor | |
| US8920149B2 (en) | Single-screw compressor having an adjustment mechanism for adjusting a compression ratio of the compression chamber | |
| CN114352523A (en) | Screw compressor, control method thereof and air conditioning equipment | |
| JPH0388989A (en) | Screw compression device and its rotor control device and operation control device | |
| CN110925199B (en) | Screw compressor, control method thereof and refrigeration system | |
| CN103727032A (en) | Low-back-pressure non-lubricating-oil rolling piston type refrigeration compressor | |
| EP2423508B1 (en) | capacity control for a screw compressor | |
| CN204646663U (en) | Multiscrew compressor | |
| JP2013036403A (en) | Screw compressor | |
| CN107237754B (en) | Rotor compressor with air supplementing structure and compression method | |
| CN112431759A (en) | Compressor with high adjustment precision, control method thereof and air conditioning system | |
| EP3225848A1 (en) | Screw compressor and refrigeration cycle device | |
| WO2017094057A1 (en) | Single-screw compressor and refrigeration cycle device | |
| CN216198987U (en) | Screw compressor with automatically adjustable internal volume ratio | |
| CN215979910U (en) | Oil circuit circulation system and compressor comprising same | |
| CN218991870U (en) | Screw compressor with adjustable internal volume ratio | |
| CN116906330A (en) | Fixed-frequency double-screw compressor slide valve mechanism driven by double oil cavities and control method | |
| CN210423010U (en) | Compressor with advance exhaust function and air conditioning system | |
| CN2709679Y (en) | Vortex compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |