CN211259010U - Two-stage compressor and air conditioning unit - Google Patents
Two-stage compressor and air conditioning unit Download PDFInfo
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- CN211259010U CN211259010U CN201921527402.1U CN201921527402U CN211259010U CN 211259010 U CN211259010 U CN 211259010U CN 201921527402 U CN201921527402 U CN 201921527402U CN 211259010 U CN211259010 U CN 211259010U
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 83
- 238000007906 compression Methods 0.000 claims abstract description 66
- 230000006835 compression Effects 0.000 claims abstract description 58
- 239000003507 refrigerant Substances 0.000 claims abstract description 20
- 230000009977 dual effect Effects 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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Abstract
The application provides a two-stage compressor and an air conditioning unit. The dual stage compressor includes a low pressure stage and a high pressure stage in series with the low pressure stage. The two-stage compressor also comprises a volume ratio adjusting mechanism which is arranged on the high-pressure stage and used for changing the volume ratio of the high-pressure stage to the compression of the refrigerant. By applying the technical scheme of the utility model, when the compression end pressure of the compressor is less than the exhaust pressure, the volume ratio of the high-pressure stage to the refrigerant compression is increased by operating the volume ratio adjusting mechanism, so that the compression end pressure of the compressor is equal to the exhaust pressure; when the compression final pressure of the compressor is larger than the exhaust pressure, the volume ratio adjusting mechanism is operated to reduce the volume ratio of the high-pressure stage to the refrigerant compression, so that the compression final pressure of the compressor is equal to the exhaust pressure, the situations of over-compression and under-compression are improved, the change of external conditions is adapted, the energy efficiency of the compressor is improved, and the noise of the compressor is reduced.
Description
Technical Field
The utility model relates to a compressor technical field particularly, relates to a double stage compressor and air conditioning unit.
Background
In the conventional single-stage compressor, a capacity adjustment mechanism is used. Under some conditions, the unit needs to operate under a smaller load working condition, and the compressor slider is controlled to move to change the capacity to meet the requirement.
However, in a two-stage compressor, the capacity is generally changed only by performing variable frequency modulation on the compressor. The inability to effectively adjust the internal volume ratio of a two-stage compressor results in over-compression and under-compression conditions in the compressor when the final compression pressure and the discharge pressure are not equal, both of which result in additional energy loss and strong periodic discharge noise.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a double stage compressor and air conditioning unit to solve among the prior art double stage compressor existence because the compression has ended pressure and the technical problem of the energy loss and the noise that the exhaust pressure inequality caused.
The embodiment of this application provides a double stage compressor, including low-pressure stage and with the serial high-pressure stage of low-pressure stage, double stage compressor still includes: and the volume ratio adjusting mechanism is arranged on the high-pressure stage and used for changing the volume ratio of the high-pressure stage to the refrigerant compression.
In one embodiment, the compressor is a screw compressor, and the volume ratio adjustment mechanism is a first slide valve adjustment mechanism for changing an output position of the exhaust port of the high pressure stage.
In one embodiment, the two-stage compressor further comprises a capacity adjustment mechanism disposed at the low-pressure stage for varying an output capacity of the low-pressure stage for compressing the refrigerant.
In one embodiment, the capacity adjustment mechanism is a second slide valve adjustment mechanism for varying the output of the bypass port of the low pressure stage.
In one embodiment, the volume adjustment mechanism is a plunger adjustment mechanism for volume adjustment by fixed point bypass inhalation volume.
In one embodiment, the capacity adjustment mechanism is a rotation speed adjustment mechanism that controls the suction amount by changing the rotation speed of the motor to achieve capacity adjustment.
In one embodiment, the dual stage compressor further comprises a first drive mechanism coupled to the first slide valve adjustment mechanism for driving movement of the first slide valve adjustment mechanism.
In one embodiment, the dual stage compressor further comprises a second drive mechanism coupled to the second slide valve adjustment mechanism for driving movement of the second slide valve adjustment mechanism.
The application also provides an air conditioning unit, which comprises the double-stage compressor, wherein the double-stage compressor is the double-stage compressor.
In the above embodiment, when the compression end pressure of the compressor is smaller than the discharge pressure, the volume ratio adjusting mechanism is operated to increase the volume ratio of the high-pressure stage to the refrigerant compression, so that the compression end pressure of the compressor is equal to the discharge pressure; when the compression final pressure of the compressor is greater than the exhaust pressure, the volume ratio adjusting mechanism is operated to reduce the volume ratio of the high-pressure stage to the refrigerant compression, so that the compression final pressure of the compressor is equal to the exhaust pressure, the situations of over-compression and under-compression are improved, the change of external conditions is adapted, the energy efficiency of the compressor is improved, and the noise of the compressor is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic overall structural view of an embodiment of a two-stage compressor according to the present invention;
FIG. 2 is a schematic diagram of the high pressure stage of the dual stage compressor of FIG. 1;
fig. 3 is a schematic diagram of the construction of the low pressure stage of the dual stage compressor of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Fig. 1 and 2 show an embodiment of the two-stage compressor of the present invention, comprising a low-pressure stage 10 and a high-pressure stage 20 in series with the low-pressure stage 10. The two-stage compressor further includes a volume ratio adjusting mechanism 30 disposed on the high-pressure stage 20 for changing a volume ratio of the high-pressure stage 20 to the compression of the refrigerant.
By applying the technical scheme of the utility model, when the compression end pressure of the compressor is smaller than the exhaust pressure, the volume ratio of the high-pressure stage 20 to the refrigerant compression is increased by operating the volume ratio adjusting mechanism 30, so that the compression end pressure of the compressor is equal to the exhaust pressure; when the compression final pressure of the compressor is greater than the discharge pressure, the volume ratio adjusting mechanism 30 is operated to reduce the volume ratio of the high-pressure stage 20 to the refrigerant compression, so that the compression final pressure of the compressor is equal to the discharge pressure, the situations of over-compression and under-compression are improved, the change of external conditions is adapted, the energy efficiency of the compressor is improved, and the noise of the compressor is reduced.
Alternatively, in the technical solution of the present embodiment, as shown in fig. 2, the compressor is a screw compressor, the volume ratio adjusting mechanism 30 is a first slide valve adjusting mechanism, and the first slide valve adjusting mechanism is used for changing the output position of the exhaust port 21 of the high pressure stage. By varying the output position of the discharge port 21 of the high pressure stage, it is possible to discharge the refrigerant of different volume ratios from the high pressure stage 20. Specifically, the volume ratio of the refrigerant at the output position of the high-pressure-stage discharge port 21 closer to the screw input end is lower, and the volume ratio of the refrigerant at the output position of the high-pressure-stage discharge port 21 closer to the screw output end is higher. When the high-pressure stage 20 is used, the regulating slide block moves leftwards, and the exhaust port 21 of the high-pressure stage moves leftwards at the moment, so that the compression end pressure of the high-pressure stage 20 is reduced, and the compression end pressure of the high-pressure stage 20 is equal to the exhaust pressure. The first slide valve adjusting mechanism is controlled to a set position, and the internal volume ratio is changed to match the compression final pressure with the exhaust pressure, so that the noise of the compressor is reduced, and the energy efficiency of the compressor is improved.
As other alternative embodiments, the form of the volume ratio adjusting mechanism 30 is not limited to the spool valve.
In addition, as shown in fig. 1, the two-stage compressor further includes a bearing 80 bridging the low-pressure stage 10 and the high-pressure stage 20, and a motor 70 driving the low-pressure stage 10 and the high-pressure stage 20 to rotate.
As shown in fig. 1 and 3, in the solution of the present embodiment, the two-stage compressor further includes a capacity adjustment mechanism 40, which is disposed on the low-pressure stage 10 and is used for changing the output capacity of the low-pressure stage 10 for compressing the refrigerant. Therefore, the technical scheme of the utility model, not only possess the function that capacity modulation and interior volume ratio were adjusted simultaneously. The compressor can adjust the capacity of the compressor according to external requirements, and meet the requirements of different load operation. Meanwhile, the internal volume ratio can be adjusted according to the change of the external pressure, the compression end pressure of the compressor is changed, and the situations of over compression and under compression are avoided, so that the noise is reduced, and the energy efficiency of the compressor is improved.
In the conventional compressor, the capacity adjustment and the internal volume ratio adjustment are used separately. Alternatively, as shown in fig. 3, in the solution of the present embodiment, the capacity adjustment mechanism 40 is a second slide valve adjustment mechanism, and the second slide valve adjustment mechanism is used for changing the output quantity of the bypass port 11 of the low pressure stage. When the front end of the second slide valve adjusting mechanism is completely contacted with the stop, the bypass port 11 of the low pressure stage is closed at this time, and the compressor is in a full load state. When partial load operation needs exist, the system moves rightwards through the second sliding valve adjusting mechanism, at the moment, the bypass port 11 of the low-pressure stage is communicated with the air suction side, namely, the partially compressed gas bypasses to the air suction side, the actual air suction amount is changed, and partial meeting of the needs can be realized.
As other alternative embodiments, the volume adjustment mechanism 40 may also be selected as a plunger adjustment mechanism for achieving volume adjustment by fixed-point bypass inhalation amount.
As another alternative, the capacity adjustment mechanism 40 may also be a rotation speed adjustment mechanism, and the rotation speed adjustment mechanism controls the suction amount by changing the rotation speed of the motor to achieve capacity adjustment. Specifically, in the present embodiment, the capacity adjustment mechanism 40 is an inverter, but the rotation speed adjustment mechanism is not limited to an inverter.
As an alternative implementation manner, in the solution of the present embodiment, the dual-stage compressor further includes a first driving mechanism 50, and the first driving mechanism 50 is connected to the first slide valve adjusting mechanism for driving the first slide valve adjusting mechanism to move. Optionally, the dual stage compressor further comprises a second driving mechanism 60, and the second driving mechanism 60 is connected to the second slide valve adjusting mechanism for driving the second slide valve adjusting mechanism to move. Preferably, the first driving mechanism 50 and the second driving mechanism 60 are movable cylinders, and the output end of each movable cylinder is connected with the first slide valve adjusting mechanism or the second slide valve adjusting mechanism, so that the movable cylinder drives the first slide valve adjusting mechanism and the second slide valve adjusting mechanism to move. Optionally, the movable cylinder is a hydraulic cylinder or an air cylinder or an electric cylinder.
As the above embodiment is exemplified by selecting one of the forms of capacity adjustment and internal volume ratio adjustment, the single-unit two-stage screw compressor of the present invention may also adopt other forms that can realize capacity adjustment and internal volume ratio adjustment.
When the compressor runs, after the exhaust pressure changes, the compression end pressure of the compressor is not equal to the exhaust pressure, and the conditions of over compression and under compression can occur at the moment, so that the problems of high noise and high power consumption of the compressor are caused.
The utility model also provides a control method of doublestage compressor, control method are used for controlling foretell compressor, and control method includes:
when the compression end pressure of the compressor is smaller than the discharge pressure, the volume ratio adjusting mechanism 30 is operated to increase the volume ratio of the compressor to the compression of the refrigerant;
when the compression end pressure of the compressor is greater than the discharge pressure, the volume ratio adjustment mechanism 30 is operated to decrease the volume ratio of the compressor to the compression of the refrigerant.
When the compressor is operated, after the exhaust pressure changes, the compression end pressure of the compressor is not equal to the exhaust pressure, and the conditions of over compression and under compression can occur at the moment, so that the problems of high noise and high power consumption of the compressor are caused. Therefore, at this time, the compressor detects and compares the compression end pressure and the exhaust pressure, compares the pressures and judges the pressure relationship to give an instruction of the moving direction of the slide block. When the compression end pressure of the compressor is detected to be unequal to the discharge pressure, the discharge pressure of the high-pressure stage 20 is adjusted to achieve the purpose of changing the compression end pressure of the compressor. When the compression end pressure of the compressor is smaller than the discharge pressure, the volume ratio adjusting mechanism 30 is operated to increase the volume ratio of the high-pressure stage 20 to the refrigerant compression; when the compression end pressure of the compressor is greater than the discharge pressure, the volume ratio adjustment mechanism 30 is operated to decrease the volume ratio of the high-pressure stage 20 to the compression of the refrigerant.
Specifically, as shown in fig. 2, in combination with the above-mentioned embodiment of the sliding valve adjusting mechanism, when the compression end pressure of the high-pressure stage is less than the discharge pressure, a command is issued to move the first sliding valve adjusting mechanism to the right, and at this time, the position of the discharge port moves backward, so that the compression end pressure of the high-pressure stage 20 is increased, and the compression end pressure of the compressor is equal to the discharge pressure; when the compression end pressure of the compressor is larger than the exhaust pressure, a command is given to the first slide valve adjusting mechanism to move leftwards, and the exhaust hole position moves forwards at the moment, so that the compression end pressure of the high-pressure stage 20 is reduced, and the compression end pressure of the compressor is equal to the exhaust pressure. The first slide valve adjusting mechanism is controlled to move to a set position, and the internal volume ratio is changed to enable the compression end pressure to be matched with the exhaust pressure, so that the noise of the compressor is reduced, and the energy efficiency of the compressor is improved.
Use the technical scheme of the utility model, when external pressure changes, the accessible detects compression end pressure and exhaust pressure, judges the two relation and assigns the instruction to the inner volume than adjusting the structure, adjusts low pressure level exhaust vent position for the compression has ended pressure and exhaust pressure and is close, improves the condition of over compression and under compression, changes with adaptation external conditions, improves the efficiency of compressor, reduces the compressor noise.
The utility model also provides an air conditioning unit, including foretell doublestage compressor. By adopting the two-stage compressor, the energy efficiency of the air conditioning unit can be improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A two-stage compressor comprising a low-pressure stage (10) and a high-pressure stage (20) in series with the low-pressure stage (10), characterized in that it further comprises:
and the volume ratio adjusting mechanism (30) is arranged on the high-pressure stage (20) and is used for changing the volume ratio of the high-pressure stage (20) to the refrigerant compression.
2. The two-stage compressor according to claim 1, wherein the compressor is a screw compressor, and the volume ratio adjusting mechanism (30) is a first slide valve adjusting mechanism for changing an output position of the discharge port (21) of the high-pressure stage.
3. The two-stage compressor according to claim 1, further comprising a capacity adjustment mechanism (40) provided on the low-pressure stage (10) for varying an output capacity of the low-pressure stage (10) for compressing the refrigerant.
4. The two-stage compressor according to claim 3, characterized in that the capacity modulation mechanism (40) is a second slide valve modulation mechanism for varying the output of the bypass port (11) of the low-pressure stage.
5. The two-stage compressor of claim 3, wherein the capacity modulation mechanism (40) is a plunger modulation mechanism for achieving capacity modulation through fixed-point bypass suction.
6. The two-stage compressor according to claim 3, wherein the capacity modulation mechanism (40) is a speed modulation mechanism that controls suction by varying motor speed to achieve capacity modulation.
7. The dual-stage compressor of claim 2, further comprising a first drive mechanism (50), the first drive mechanism (50) being coupled to the first slide valve adjustment mechanism for driving movement of the first slide valve adjustment mechanism.
8. The dual-stage compressor of claim 4, further comprising a second drive mechanism (60), the second drive mechanism (60) being coupled to the second slide valve adjustment mechanism for driving movement of the second slide valve adjustment mechanism.
9. Air conditioning assembly comprising a two-stage compressor, characterized in that it is a two-stage compressor according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921527402.1U CN211259010U (en) | 2019-09-11 | 2019-09-11 | Two-stage compressor and air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921527402.1U CN211259010U (en) | 2019-09-11 | 2019-09-11 | Two-stage compressor and air conditioning unit |
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| Publication Number | Publication Date |
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| CN211259010U true CN211259010U (en) | 2020-08-14 |
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| CN201921527402.1U Active CN211259010U (en) | 2019-09-11 | 2019-09-11 | Two-stage compressor and air conditioning unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566461A (en) * | 2019-09-11 | 2019-12-13 | 珠海格力电器股份有限公司 | two-stage compressor, control method of two-stage compressor and air conditioning unit |
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2019
- 2019-09-11 CN CN201921527402.1U patent/CN211259010U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566461A (en) * | 2019-09-11 | 2019-12-13 | 珠海格力电器股份有限公司 | two-stage compressor, control method of two-stage compressor and air conditioning unit |
| WO2021047247A1 (en) * | 2019-09-11 | 2021-03-18 | 珠海格力电器股份有限公司 | Two-stage compressor and control method of two-stage compressor, and air conditioning unit |
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