CN213578184U - Compressor and double-compressor series heat pump unit - Google Patents
Compressor and double-compressor series heat pump unit Download PDFInfo
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- CN213578184U CN213578184U CN202022400838.3U CN202022400838U CN213578184U CN 213578184 U CN213578184 U CN 213578184U CN 202022400838 U CN202022400838 U CN 202022400838U CN 213578184 U CN213578184 U CN 213578184U
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- compressor
- pressure compressor
- lubricating oil
- oil
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Abstract
The utility model provides a compressor, two compressor series heat pump set, compressor wherein, including first compression portion and first drive division, first drive division is set up in first gear box casing, first compression portion is set up in first air inlet casing, first air inlet casing with first gear box casing connects as an organic wholely, be constructed first opening by side on the first air inlet casing, be constructed first lubricating oil inlet and first balanced mouth on the first gear box casing. According to the utility model discloses, set up first opening on the compressor housing, first balanced mouth and first lubricating oil inlet can do benefit to and realize lining up under the different operational mode of unit through setting up corresponding communicating pipe way when it uses in two compressor series heat pump set, and then all can guarantee under single compressor operational mode and two compressor operational mode that lubricating oil in the compressor smoothly flows back to external oil tank in.
Description
Technical Field
The utility model belongs to the technical field of air conditioning, concretely relates to compressor, two compressor series connection heat pump set.
Background
The schematic structural diagram of a dual-compressor series heat pump unit (also called a dual-compressor series high-temperature heat pump unit) is shown in fig. 1, and the dual-compressor series heat pump unit mainly comprises an evaporator, a condenser, a low-pressure compressor, a high-pressure compressor, an electric butterfly valve, a check valve, a throttling electronic expansion valve, a corresponding pipeline structure and the like; the air suction port of the low-pressure compressor is connected with the evaporator, one path of the exhaust port of the low-pressure compressor is connected with the condenser, the side of the exhaust pipe close to the condenser is provided with an electric butterfly valve and a check valve, and the other path of the exhaust port of the low-pressure compressor is connected with the air suction port of the high-pressure compressor; the air suction port of the high-pressure compressor is connected with the exhaust pipe of the low-pressure compressor, the exhaust port of the high-pressure compressor is connected with the condenser, and the side of the exhaust pipe close to the condenser is provided with a check valve; a throttle device such as an electronic expansion valve is arranged between the condenser and the evaporator.
When the compressor operates under normal and non-severe working conditions, the low-pressure compressor is opened, the electric butterfly valve is opened, and high-pressure refrigerant compressed by the low-pressure compressor is directly discharged to the condenser along the exhaust pipe, as shown in fig. 2; when the high-temperature and high-pressure severe working condition is operated, the double-open compressor (namely, the high-pressure compressor and the low-pressure compressor operate simultaneously) is closed, the electric butterfly valve is closed, and the high-pressure refrigerant compressed by the low-pressure compressor is sucked by the high-pressure compressor along the exhaust pipe, compressed again and then discharged to the condenser, as shown in fig. 3.
Because the compressor impeller side and the gearbox side are connected in a comb tooth sealing manner (shown in fig. 4), when high-pressure gas is generated on the compressor impeller side, the high-pressure gas inevitably flows to the gearbox side along a gap sealed by the comb tooth, so that the internal pressure of the gearbox cavity is continuously increased. When the conventional lubricating structure is applied to a dual-compressor series heat pump unit, as shown in fig. 5, when the unit operates in a single-compressor mode (i.e. the operation mode shown in fig. 2), the high-pressure compressor does not operate, only the low-pressure compressor operates, the electric butterfly valve is opened, the exhaust gas of the low-pressure compressor is directly discharged to the condenser, wherein the air suction port of the high-pressure compressor is also in a high-pressure state at the moment because the air suction port of the high-pressure compressor is directly communicated with the exhaust pipe of the low-pressure compressor, namely the impeller side of the compressor is in high pressure, and inevitably, the high-pressure gas at the position can leak into the cavity of the gear box along a gap between the bearing and the comb seal, because the high-pressure compressor does not work and an oil way on the side of the high-pressure compressor does not operate, high-pressure gas leaked in a cavity of the gear box flows back into the external oil tank along an oil return pipe of the high-pressure compressor, so that the pressure in the external oil tank is increased, when more and more high-pressure gas leaked by the high-pressure compressor is leaked, the pressure in the external oil tank is higher and higher, finally, oil gathered in the gear box of the low-pressure compressor and oil in an oil return pipe pipeline of the low-pressure compressor are more and more difficult to flow back into the oil tank, finally, the oil;
when the unit allows a double-compressor mode (namely, an operation mode shown in fig. 3), the high-pressure compressor and the low-pressure compressor operate simultaneously, the electric butterfly valve is closed, exhaust gas of the low-pressure compressor is directly absorbed by a suction port of the high-pressure compressor and is further pressurized and then discharged into the condenser, wherein the high-pressure compressor impeller further applies work and pressure to gas, so that the side of the high-pressure compressor impeller is in a high-pressure state at the moment, inevitably, the high-pressure gas at the position can leak into a cavity of the gear box along a gap between the bearing and the comb seal, when part of the high-pressure gas leaks, the high-pressure gas is favorable for returning lubricating oil in the gear box to the oil box, but when the high-pressure gas leaks more and more (only does not leak, the pressure of the high-pressure gas is higher and higher, wherein the space of a closed system, the pressure is higher, sealing elements such as gaskets and thin-wall pipelines are easy to break and lose efficacy due to overlarge bearing pressure), high-pressure gas leaked in the cavity of the gear box flows back to the external oil tank along the oil return pipe of the high-pressure compressor or the pipeline of the balance pipe, the pressure in the external oil tank is high, the high-pressure gas leaked by the high-pressure compressor is more and more, the pressure in the external oil tank is higher and more, finally, the oil gathered in the gear box of the low-pressure compressor and the oil in the oil return pipe of the low-pressure compressor are more and more difficult to flow back to the oil tank, the oil in the oil tank is. The present invention is provided based on this phenomenon.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model is to provide a compressor, two compressor series heat pump set, set up first opening on the compressor housing, first balanced mouth and first lubricating oil inlet can do benefit to and realize lining up under the different operational mode of unit through setting up corresponding communicating pipe when it uses in two compressor series heat pump set, and then all can guarantee under single compressor operational mode and two compressor operational mode that lubricating oil in the compressor smoothly flows back to external oil tank.
In order to solve the problem, the utility model provides a compressor, including first compression portion and first drive division, first drive division is set up in first gear box casing, first compression portion is set up in first air inlet casing, first air inlet casing with first gear box casing connection is as an organic whole, be constructed first bypass opening on the first air inlet casing, be constructed first lubricating oil inlet and first balanced mouth on the first gear box casing.
Preferably, the first lubricating oil inlet is arranged at the top position of the first gearbox shell.
Preferably, a first lubricating oil tank is connected to the first lubricating oil inlet.
Preferably, the first lubricating oil inlet is located at the upper part of one end, away from the first compression part, of the rotating shaft in the first gearbox housing.
The utility model also provides a two compressor series heat pump set, including low pressure compressor, high pressure compressor and external oil tank, external oil tank is used for right low pressure compressor, high pressure compressor input lubricating oil and with unnecessary lubricating oil backward flow save in wherein, low pressure compressor reaches high pressure compressor is foretell compressor, the first bypass mouth that low pressure compressor has with the second balance mouth that high pressure compressor has realizes the optional link up through first balance pipe, first balance pipe still through the second balance pipe with external oil tank through connection so that external oil tank with first bypass mouth keeps lining up.
Preferably, an electromagnetic on-off valve is arranged on the first balance pipe between the second balance pipe and the second balance port.
Preferably, the external oil tank is further provided with a first oil pump and a second oil pump, the first oil pump pumps the lubricating oil of the external oil tank to a first lubricating oil inlet of the low-pressure compressor through a first oil inlet pipe, and the second oil pump pumps the lubricating oil of the external oil tank to a second lubricating oil inlet of the high-pressure compressor through a second oil inlet pipe.
The utility model provides a pair of compressor, two compressor series connection heat pump set up first opening on the compressor housing, first balanced mouth and first lubricating oil inlet can do benefit to and realize lining up under the different operational mode of unit through setting up corresponding communicating pipe when it uses two compressor series connection heat pump set, and then all can guarantee under single compressor operational mode and two compressor operational mode that lubricating oil in the compressor smoothly flows back in external oil tank, can also prevent under two compressor operational mode the phenomenon that the high pressure leads to sealed inefficacy takes place in the first gear box casing.
Drawings
FIG. 1 is a schematic diagram of a refrigerant circulation pipeline of a dual-compressor series heat pump unit in the prior art;
FIG. 2 is a schematic diagram illustrating the refrigerant circulation of the dual-compressor tandem heat pump unit shown in FIG. 1 in a single-compressor operation mode;
fig. 3 is a schematic diagram of refrigerant circulation of the dual-compressor series heat pump unit in fig. 1 in a dual-compressor operation mode;
FIG. 4 is a schematic structural diagram of the compressor of FIG. 1, wherein the rotating shaft is at one end close to the compression part;
FIG. 5 is a schematic diagram of a lubricating oil flow line structure of a dual-compressor tandem heat pump unit corresponding to FIG. 1 in the prior art;
FIG. 6 is a schematic view of the structure of a lubricating oil circulation pipeline of the dual-compressor series heat pump unit of the present invention;
FIG. 7 is a schematic view of the flow of lubricating oil in the dual-compressor tandem heat pump unit of FIG. 6 in the single-compressor operating mode;
fig. 8 is a schematic view of the flow of the lubricating oil in the dual-compressor tandem heat pump unit of fig. 6 in the dual-compressor operation mode.
The reference numerals are represented as:
1. a low pressure compressor; 11. a first air intake housing; 111. a first bypass port; 12. a first gearbox housing; 121. a first balance port; 122. a first lubricating oil tank; 123. a first oil return port; 2. a high pressure compressor; 21. a second air intake housing; 211. a second bypass port; 22. a second gearbox housing; 221. a second balance port; 222. a second lubricating oil tank; 223. a second oil return port; 3. an external oil tank; 31. a first oil pump; 32. a second oil pump; 41. a first balance tube; 42. an electromagnetic on-off valve; 43. a second balance tube; 44. a first oil inlet pipe; 45. a second oil inlet pipe; 46. a first oil return pipe; 47. a second oil return pipe.
Detailed Description
Referring to fig. 1 to 8 in combination, according to an embodiment of the present invention, a compressor is provided, including a first compression portion and a first driving portion, the first driving portion is disposed in a first gearbox housing 12, the first compression portion is disposed in a first air intake housing 11, the first air intake housing 11 and the first gearbox housing 12 are connected as a whole, a first bypass opening 111 is configured on the first air intake housing 11, a first lubricating oil inlet and a first balance opening 121 are configured on the first gearbox housing 12, and a first oil return opening 123 is further configured at a lower position of the first gearbox housing 12. Among this technical scheme, set up first bypass mouth, first balanced mouth and first lubricating oil inlet on the compressor housing and can do benefit to and realize lining up under the different operating modes of unit through setting up corresponding communicating pipe way when it uses in two compressor series heat pump set, and then all can guarantee that lubricating oil in the compressor smoothly flows back to external oil tank under single compressor operating mode and two compressor operating modes, can also prevent under two compressor operating modes the phenomenon that the too high pressure leads to sealed inefficacy in the first gear box casing takes place.
Further, the first lubricating oil inlet is arranged at the top of the first gearbox shell 12, so that lubricating oil entering the first gearbox shell 12 can lubricate the gear train and the corresponding bearing in the first gearbox shell from bottom to top. Preferably, a first lubricating oil tank 122 is connected to the first lubricating oil inlet, so that when the oil pump stops operating in the external oil tank 3, a sufficient amount of lubricating oil can be stored in the first lubricating oil tank 122 and continuously enters the first gearbox housing 12 under the action of self weight, so that a rotating shaft and bearings which are still rotating under the action of inertia although the stopped compressor is controlled can be lubricated. Preferably, corresponding to the first lubricating oil inlet, a lubricating flow channel for different lubricating target positions is constructed in the first gearbox housing 12, one end of the lubricating flow channel is communicated with the first lubricating oil inlet, and the other end of the lubricating flow channel is divided into a plurality of branches which are respectively arranged for different lubricating target points. The first gearbox housing 12 is cast in detail, and the lubrication flow passages are cast into the first gearbox housing 12. Further, the first lubricating oil inlet is located at the upper part of one end, away from the first compression part, of the rotating shaft in the first gearbox shell 12.
According to an embodiment of the present invention, there is also provided a dual-compressor tandem heat pump unit, comprising a low-pressure compressor 1, a high-pressure compressor 2, and an external oil tank 3, wherein the external oil tank 3 is used for inputting lubricating oil to the low-pressure compressor 1 and the high-pressure compressor 2 and storing excessive lubricating oil back flow therein, the low-pressure compressor 1 and the high-pressure compressor 2 are the above-mentioned compressors, and it can be understood that the low-pressure compressor 1 and the high-pressure compressor 2 have the same structure in terms of mechanical structure, specifically, a second compression part and a second driving part of the high-pressure compressor 2, the second driving part is disposed in a second gearbox housing 22, the second compression part is disposed in a second air inlet housing 21, the second air inlet housing 21 and the second gearbox housing 22 are connected as a whole, a second bypass port 211 is configured on the second air inlet housing 21, a second lubricating oil inlet (on which a second lubricating oil tank 222 can be arranged) and a second balance port 221 are formed in the second gear box housing 22, a second oil return port 223 is formed in the lower portion of the second gear box housing 22, and the low pressure and the high pressure of the second lubricating oil inlet can be distinguished through the rotating speed of a corresponding motor driving part, a first bypass port 111 of the low-pressure compressor 1 and a second balance port 221 of the high-pressure compressor 2 are selectively communicated through a first balance pipe 41, and the first balance pipe 41 is further communicated with the external oil tank 3 through a second balance pipe 43 so that the external oil tank 3 is communicated with the first bypass port 111. In the technical scheme, the first bypass port 111, the second balance port 221 and the external oil tank 3 are communicated under a preset condition through the arrangement of the first balance pipe 41 and the second balance pipe 43, so that lubricating oil in a compressor can be guaranteed to smoothly flow back into the external oil tank in a single-compressor operation mode and a double-compressor operation mode, and the phenomenon that sealing failure is caused by overhigh pressure in a first gear box shell can be prevented in the double-compressor operation mode. In some embodiments, an electromagnetic on-off valve 42 is disposed on the first balance pipe 41 between the second balance pipe 43 and the second balance port 221, and on-off control of a valve body can be achieved by powering on and powering off the electromagnetic on-off valve 42.
The first oil return port 123 and the second oil return port 223 are communicated with the external oil tank 3 through a first oil return pipe 46 and a second oil return pipe 47, respectively.
Further, external oil tank 3 still is provided with first oil pump 31, second oil pump 32, first oil pump 31 will the lubricating oil of external oil tank 3 advances oil pipe 44 pump to through the first lubricating oil inlet that low pressure compressor 1 has, second oil pump 32 will the lubricating oil of external oil tank 3 advances oil pipe 45 pump to through the second lubricating oil inlet that high pressure compressor 2 has, corresponds respectively low pressure compressor 1 and high pressure compressor 2 set up one by one first oil pump 31, second oil pump 32 can independent adjustment pump oil volume respectively, and this makes the lubricating oil volume can match with the operating speed of the compressor that corresponds.
According to the utility model discloses an embodiment still provides a control method of two compressor series connection heat pump set for control foretell two compressor series connection heat pump set, include:
acquiring operation modes of a heat pump unit with two compressors connected in series, wherein the operation modes comprise a single compressor operation mode and a double compressor operation mode;
and controlling the on-off of the first bypass port 111 and the second balance port 221 according to the acquired operation mode.
Specifically, when the acquired operation mode is the single-compressor operation mode, the first bypass port 111 is controlled to be communicated with the second balance port 221, so that high-pressure leaked from the high-pressure compressor gear box can be released to the low-pressure compressor suction bypass port along the pipeline, and further internal pressure balance is ensured; when the operating mode who acquires is two compressor operating modes, control first bypass port 111 and the disconnection of second balanced port 221 for the interior high pressure who reveals of high pressure compressor gear box can be used for assisting the interior lubrication of high pressure compressor gear box and press back external oil tank 3, and then accelerates unit oil return speed, and then is favorable to promoting unit operational reliability.
Further, when the first balance pipe 41 is provided with the electromagnetic on-off valve 42 and the obtained operation mode is the single compressor operation mode, the electromagnetic on-off valve 42 is controlled to be communicated; when the first balance pipe 41 is provided with the electromagnetic on-off valve 42 and the acquired operation mode is the dual-compressor operation mode, the electromagnetic on-off valve 42 is controlled to be switched off.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A compressor includes a first compression portion and a first driving portion, the first driving portion is disposed in a first gearbox housing (12), the first compression portion is disposed in a first air intake housing (11), the first air intake housing (11) is integrally connected to the first gearbox housing (12), the compressor is characterized in that a first bypass opening (111) is formed in the first air intake housing (11), and a first lubricating oil inlet and a first balance opening (121) are formed in the first gearbox housing (12).
2. The compressor of claim 1, wherein the first lubricant oil inlet is disposed at a top location of the first gearbox housing (12).
3. The compressor of claim 2, wherein a first lubricant tank (122) is connected to the first lubricant inlet.
4. The compressor of any one of claims 1 to 3, wherein the first lubricant oil inlet is located at an upper portion of an end of the first gearbox housing (12) where the rotating shaft is remote from the first compression part.
5. A double-compressor series heat pump unit comprises a low-pressure compressor (1), a high-pressure compressor (2) and an external oil tank (3), the external oil tank (3) is used for inputting lubricating oil to the low-pressure compressor (1) and the high-pressure compressor (2) and returning and storing redundant lubricating oil in the external oil tank, characterized in that the low-pressure compressor (1) and the high-pressure compressor (2) are compressors according to any one of claims 1 to 4, the first bypass opening (111) of the low-pressure compressor (1) and the second balancing opening (221) of the high-pressure compressor (2) are selectively communicated through a first balancing pipe (41), the first balance pipe (41) is further communicated with the external oil tank (3) through a second balance pipe (43) so that the external oil tank (3) is communicated with the first bypass port (111).
6. The twin-compressor tandem heat pump unit according to claim 5, wherein an electromagnetic on-off valve (42) is provided on the first balance pipe (41) between the second balance pipe (43) and the second balance port (221).
7. The dual-compressor series heat pump unit according to claim 5, wherein the external oil tank (3) is further provided with a first oil pump (31) and a second oil pump (32), the first oil pump (31) pumps the lubricating oil of the external oil tank (3) to a first lubricating oil inlet of the low-pressure compressor (1) through a first oil inlet pipe (44), and the second oil pump (32) pumps the lubricating oil of the external oil tank (3) to a second lubricating oil inlet of the high-pressure compressor (2) through a second oil inlet pipe (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022400838.3U CN213578184U (en) | 2020-10-26 | 2020-10-26 | Compressor and double-compressor series heat pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022400838.3U CN213578184U (en) | 2020-10-26 | 2020-10-26 | Compressor and double-compressor series heat pump unit |
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| Publication Number | Publication Date |
|---|---|
| CN213578184U true CN213578184U (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022400838.3U Withdrawn - After Issue CN213578184U (en) | 2020-10-26 | 2020-10-26 | Compressor and double-compressor series heat pump unit |
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| CN (1) | CN213578184U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112197453A (en) * | 2020-10-26 | 2021-01-08 | 珠海格力电器股份有限公司 | Compressor, double-compressor series heat pump unit and control method thereof |
-
2020
- 2020-10-26 CN CN202022400838.3U patent/CN213578184U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112197453A (en) * | 2020-10-26 | 2021-01-08 | 珠海格力电器股份有限公司 | Compressor, double-compressor series heat pump unit and control method thereof |
| WO2022088813A1 (en) * | 2020-10-26 | 2022-05-05 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor, dual-compressor series heat pump unit and control method therefor |
| CN112197453B (en) * | 2020-10-26 | 2023-08-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor, double-compressor series heat pump unit and control method thereof |
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210629 Effective date of abandoning: 20230808 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210629 Effective date of abandoning: 20230808 |