CN113465239A - Oil separator, compressor, electric appliance, and method for controlling oil separator - Google Patents
Oil separator, compressor, electric appliance, and method for controlling oil separator Download PDFInfo
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- CN113465239A CN113465239A CN202110838540.7A CN202110838540A CN113465239A CN 113465239 A CN113465239 A CN 113465239A CN 202110838540 A CN202110838540 A CN 202110838540A CN 113465239 A CN113465239 A CN 113465239A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 58
- 230000000694 effects Effects 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 218
- 239000000203 mixture Substances 0.000 description 18
- 239000010687 lubricating oil Substances 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- 238000005057 refrigeration Methods 0.000 description 6
- 238000012546 transfer Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The application relates to an oil separator, a heat exchange device, an electric appliance and a control method of the oil separator. A separation cavity is arranged in the shell. The air pipe comprises an air inlet pipe and an air outlet pipe, the inner end of the air inlet pipe is communicated with the separation cavity, the outer end of the air inlet pipe is communicated with the compressor, the inner end of the air outlet pipe extends into the separation cavity, and the lower part of the separation cavity forms an oil storage space. The flow guide part is connected in the shell to separate the separation cavity, the flow guide part is positioned between the inner end of the air inlet pipe and the inner end of the air outlet pipe, the flow guide part is provided with flow passages, each flow passage comprises a first port arranged on the first surface of the flow guide part and a second port arranged on the second surface of the flow guide part, the distance from the second port to the inner wall of the shell is smaller than the distance from the first port to the inner wall of the shell, and the second port is deviated from the inner end of the air outlet pipe. The flow guide piece has a flow guide effect, the proportion of oil entering the air outlet pipe can be greatly reduced, most of the oil is collected in the oil storage space after being discharged from the second port and condensed, the oil-gas separation efficiency can be improved, and the problem of oil shortage of the compressor is solved.
Description
Technical Field
The application relates to the field of air treatment, in particular to an oil separator, a compressor, an electric appliance and a control method of the oil separator.
Background
The air source heat pump air conditioner (hereinafter referred to as heat pump air conditioner) can absorb low-grade energy from the atmospheric environment and convert the low-grade energy into high-grade energy for heating. Based on the advantages, the heat pump air conditioner is more and more widely applied. The compressor is the core spare part of heat pump air conditioner, and the temperature difference between the temperature of compressor blast pipe or condenser import and the saturation temperature that actual condensing pressure corresponds is called the exhaust superheat degree. If the compressor has no exhaust superheat, the oil discharge rate is high, so that a large amount of lubricating oil of the compressor is discharged, and the compressor is easily damaged due to oil shortage. As the outdoor environment temperature is reduced, the time required from the start of cold accumulated liquid to the establishment of the exhaust superheat degree of the compressor is prolonged, and the oil return speed of the compressor is low under the low-temperature condition. Therefore, starting oil shortage under the condition of low-temperature liquid accumulation is a common problem of the heat pump air conditioner. For commercial heat pump air conditioning products, long connecting pipes and high drop height installations are often required, which further exacerbates the risk of starved damage to the compressor.
Aiming at the problem of low-temperature liquid accumulation starting oil shortage, the conventional solution is to increase an oil separator and add compressor refrigeration oil during engineering installation. In general, the problem of oil shortage of a compressor can be solved by adding an oil separator to a common heat pump air conditioner, but in an ultra-low temperature heat pump air conditioner, in addition to the oil separator, the compressor refrigeration oil is generally required to be added during engineering installation. However, because the space of the compressor oil pool is limited, more refrigeration oil cannot be contained, the additional refrigeration oil can be discharged into the air conditioning system by the compressor to influence the heat exchange of the heat exchanger, so that the problems of poor heat exchange capacity and power consumption increase of the air conditioner are caused, and the problem of oil shortage of the compressor cannot be solved. The fundamental reason of the problems is that the oil-gas separation effect of the oil separator does not meet the expected requirement, excessive oil is led into the heat exchange loop, and the separated oil can also sufficiently supplement the oil shortage of the compressor in the exhaust process.
In view of the above, it is desirable to improve the structure of the existing oil separator to improve the oil-gas separation capability of the oil separator.
Disclosure of Invention
In order to solve the technical problem that the oil-gas separation capacity and the oil storage capacity are poor in the structure of the oil separator in the prior art, the application provides an oil separator, a compressor, an electric appliance and a control method of the oil separator.
In a first aspect, the present application provides an oil separator comprising:
the separation device comprises a shell, a separation chamber and a separation chamber, wherein the shell is internally provided with the separation chamber;
the air pipe comprises an air inlet pipe and an air outlet pipe, the inner end of the air inlet pipe is communicated with the separation cavity, the outer end of the air inlet pipe is communicated with the compressor, the inner end of the air outlet pipe extends into the separation cavity, and the lower part of the separation cavity forms an oil storage space; and the number of the first and second groups,
the flow guide part is connected in the shell to divide the separation cavity, the flow guide part is positioned between the inner end of the air inlet pipe and the inner end of the air outlet pipe, the flow guide part is provided with one or more flow passages, each flow passage comprises a first port arranged on the first surface of the flow guide part and a second port arranged on the second surface of the flow guide part, the distance from the second port to the inner wall of the shell is smaller than the distance from the first port to the inner wall of the shell, and the second port is deviated from the inner end of the air outlet pipe.
In a preferred embodiment, the oil separator further includes an oil filter disposed in the separation chamber and disposed between the inner end of the intake pipe and the flow guide.
In a preferred embodiment, a sum of sectional areas of the flow passages is larger than a sectional area of the intake pipe.
In a preferred embodiment, the size of the first port corresponds to the size of the second port, or the size of the first port is larger than the size of the second port.
In a preferred embodiment, the flow passages are arranged in an annular interval manner, and each flow passage is arranged from the center of the flow guide part to the edge of the flow guide part in an inclined manner.
In a preferred embodiment, the inner end of the outlet pipe extends upwards and is spaced from the flow guide piece by 0.5-5 times of the diameter of the outlet pipe.
In a preferred embodiment, a three-way valve is arranged on the outer side of the housing, and the three-way valve is communicated with the housing through a first oil return pipe and a second oil return pipe and communicated with the low-pressure side of the compressor through a third oil return pipe.
Further, in the above embodiment, the first oil return pipe is provided with a first oil return opening, the second oil return pipe is provided with a second oil return opening, the second oil return opening is disposed at the bottom of the oil storage space, and the first oil return opening is higher than the second oil return opening.
Or further, in the above embodiment, the housing is provided with a bracket, and the three-way valve is provided on an outer side surface of the housing through the bracket.
In a preferred embodiment, the outlet pipe is provided with a low section, and the inner port and the outer port of the outlet pipe are higher than the low section.
In a second aspect, the application further provides a heat exchange device, the heat exchange device comprises a compressor, and the exhaust pipe of the compressor is provided with the oil separator with the structure.
In a third aspect, the present application further provides an electrical appliance, including the oil separator with the above structure, or the heat exchange device with the above structure.
In a fourth aspect, the present application further provides a control method for an oil separator, which is applied to the oil separator with the above structure, and includes the following steps:
acquiring the starting time of a compressor;
acquiring the exhaust superheat degree of a compressor;
if the starting time of the compressor is lower than the preset time or the exhaust superheat degree of the compressor is lower than the preset temperature threshold, the first oil return pipe and the third oil return pipe are communicated, and the third oil return pipe is communicated with the compressor;
and if the starting time of the compressor is more than the preset time or the exhaust superheat degree of the compressor is more than the preset temperature threshold, the second oil return pipe and the third oil return pipe are communicated, and the third oil return pipe is communicated with the compressor.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: the inner of outlet duct stretches into the separation chamber of casing, makes the lower part in separation chamber form the oil storage space, has set up water conservancy diversion spare in the inner of intake pipe and the inner of outlet duct moreover, and water conservancy diversion spare is equipped with the runner that supplies gas to pass through, makes the oil-gas mixture body pass through the runner and spray to the inner wall of casing, and the most collection of messenger's fluid after the condensation liquefaction is slided in the shells inner wall gradually, makes the most of fluid collect and save in the oil storage intracavity. Compare traditional oil separator, the water conservancy diversion spare that this application was add can carry out the water conservancy diversion with the oil content, because the second mouth of water conservancy diversion spare deviates with the inner of outlet duct, so the oil gas mixture can not directly get into the outlet duct, just can discharge from the outlet duct after the air current turns to many times, consequently only a small amount of gaseous oil content is unfinished and is just probably got into the outlet duct when separating, thereby reduce the oil content that gets into the outlet duct, and then avoid the oil content to enter into in heat transfer pipeline and the heat exchanger along with the outlet duct, the oil-gas separation ability of oil separator has been improved, make the oil content after the separation loopback the compressor again, can improve the volume of returning oil of lubricating oil by a wide margin, avoid in the oil content gets into the heat exchanger among the heat transfer system, effectively solve the oil shortage problem of compressor.
The invention provides a control method of an oil separator, which adjusts the oil return amount or oil return speed to a compressor according to the operation condition of the compressor: at the initial stage of operation of the compressor, namely when the starting time is short or the exhaust superheat degree is low, a large amount of oil gas is brought out, at the moment, in order to quickly supplement lubricating oil of the compressor, the first oil return pipe is communicated with the third oil return pipe, the separated lubricating oil is discharged from the bottom and returned to the low-pressure side of the compressor, the oil return efficiency is improved, and the oil return amount is ensured; after the compressor operates normally gradually, namely the starting time is longer or the exhaust superheat degree is higher, the exhausted oil gas is less, the second oil return pipe is communicated with the third oil return pipe, and the lubricating oil in the oil separator can be exhausted and returned to the low-pressure side of the compressor after exceeding the second oil return pipe.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention 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, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an oil separator according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a flow guide member according to an embodiment of the present disclosure;
fig. 3 is a cross-sectional view of a flow guide member in a direction a-a according to an embodiment of the present disclosure.
Wherein the reference numerals are:
100. a housing; 101. a separation chamber; 110. an upper cylinder body; 120. a lower cylinder body; 200. an air tube; 210. an air inlet pipe; 220. an air outlet pipe; 221. a low-order section; 300. a flow guide member; 310. a flow channel; 311. a first port; 312. a second port; 400. an oil filter; 500. a three-way valve; 510. a first oil return pipe; 520. a second oil return pipe; 530. a third oil return pipe; 540. and (4) a bracket.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to solve the technical problem of poor oil storage capacity of the oil separator in the prior art, refer to fig. 1-3. The application provides an oil separator, a heat exchange device, an electric appliance and a control method of the oil separator. The oil separator separates oil gas discharged from the compressor, and most of the oil gas is stored in the oil storage space of the oil separator by the separation and guide action of the flow guide member 300, so that most of the discharged oil gas is returned to the compressor. The compressor can be applied to a heat exchange device to realize refrigeration or heating, and further applied to electrical appliances such as air conditioners, refrigerators and the like. The invention is explained in detail below with reference to specific embodiments and the drawing of the description.
Referring to fig. 1, in a first aspect, the present application provides an oil separator including a housing 100, an air pipe 200, and a baffle 300. A separation chamber 101 is provided in the housing 100. The air pipe 200 includes an air inlet pipe 210 and an air outlet pipe 220, the inner end of the air inlet pipe 210 is connected to the separation chamber 101, the outer end of the air inlet pipe 210 is connected to the compressor, the inner end of the air outlet pipe 220 extends into the separation chamber 101, and an oil storage space is formed at the lower portion of the separation chamber 101. The flow guide 300 is connected to the inside of the housing 100 to partition the separation chamber 101, the flow guide 300 is located between the inner end of the inlet pipe 210 and the inner end of the outlet pipe 220, the flow guide 300 is provided with one or more flow passages 310, each flow passage 310 includes a first port 311 located on a first surface of the flow guide 300 and a second port 312 located on a second surface of the flow guide 300, a distance from the second port 312 to the inner wall of the housing 100 is smaller than a distance from the first port 311 to the inner wall of the housing 100, and the second port 312 is offset from the inner end of the outlet pipe 220.
The work flow of the oil separator is as follows: the oil-gas mixture discharged from the compressor enters the separation chamber 101 of the present application through the gas inlet pipe 210, and then is guided to change the gas flow direction through the flow passage 310 of the flow guide 300. When passing through the flow passage 310, the oil-gas mixture enters from the first outlet and is discharged from the second outlet, and because the second port 312 is closer to the inner wall of the casing 100 than the first port 311, the oil-gas mixture can be injected to the inner wall of the casing 100, and then the oil-gas mixture is discharged from the gas outlet pipe 220 after being subjected to gas flow reversing for many times. The oil content is larger due to self weight and particle size, and the temperature is higher, and the oil content is condensed and liquefied when meeting the inner wall of the shell 100, and then slides down along the inner wall of the shell 100 to form oil liquid which is gathered in the oil storage space, and the high-pressure refrigerant gas directly enters the separation cavity 101 and finally is discharged out of the oil separator from the air outlet pipe 220 after flowing to the turn.
In order to prevent the oil from entering the outlet pipe 220 under the impact of the air flow, the deviation distance may be controlled to be about 0.1-5mm considering the overall structural size of the oil separator, and may be adaptively adjusted according to the shape of the flow passage 310 and the size of the outlet pipe 220.
According to the technical scheme, the inner end of the air outlet pipe 220 extends into the separation cavity 101 of the shell 100, so that an oil storage space is formed at the lower part of the separation cavity 101, the inner ends of the air inlet pipe 210 and the air outlet pipe 220 are provided with the flow guide pieces 300, the flow guide pieces 300 are provided with the flow passages 310 through which air passes, so that the oil-air mixture passes through the flow passages 310 and is sprayed to the inner wall of the shell 100, and condensed and liquefied oil gradually collects and slides downwards on the inner wall of the shell 100, so that most of the oil is collected and stored in the oil storage cavity. Compare traditional oil separator, the water conservancy diversion spare 300 that this application was add can carry out the water conservancy diversion with the oil content, because the second mouth 312 of water conservancy diversion spare 300 is skew with the inner of outlet duct 220, so the oil gas mixture can not directly get into outlet duct 220, just can discharge from outlet duct 220 after the air current turns to many times, consequently only a small amount of gaseous oil content is unfinished and just probably gets into outlet duct 220 when separating, thereby reduce the oil content that gets into outlet duct 220, and then avoid the oil content to enter into heat transfer pipeline and heat exchanger along with outlet duct 220 in, the oil-gas separation ability of oil separator has been improved, make the oil content after the separation return back to the compressor again, can improve the oil return volume of lubricating oil by a wide margin, avoid in the oil content gets into the heat exchanger in the heat transfer system, effectively solve the oil shortage problem of compressor.
Because the operation requirements of the compressor are different under different working conditions, the size of the inner end of the air outlet pipe 220 extending into the separation cavity 101 can be adjusted on the premise of considering the model and the operation working conditions of the compressor, so that the storage requirement of the refrigeration oil is met.
In a preferred embodiment, the oil separator further includes an oil filter 400, and the oil filter 400 is disposed in the separation chamber 101 and interposed between the inner end of the intake pipe 210 and the flow guide 300. The oil filter 400 is arranged between the inner end of the air inlet pipe 210 and the flow guide 300, so that after the airflow enters the separation cavity 101, the primary oil-gas separation is performed through the oil filter 400, a part of oil with larger particle size is condensed by a physical filtering mode, and then the condensed oil is guided through the flow guide 300. Regarding the structure of the oil filtering element 400, a filter screen can be adopted, the filter screen can be made of alloy materials, and the mesh size of the filter screen can be adjusted according to needs. The mesh number of the filter screen can be set to 100-300, that is, each inch has 100-300 holes.
In a preferred embodiment, the oil-gas separation effect of the baffle 300 is determined by the flow channels 310, including the number of the flow channels 310 and the sectional area of the flow channels 310. The air-oil mixture enters the separation chamber 101 from the air inlet pipe 210, the air pressure is suddenly reduced, and then passes through the flow guide 300, and the air pressure rises suddenly in the flow passage 310. In the oil-gas separation process of the oil-gas mixture, in order to reduce the pressure loss of the oil-gas mixture, the sum of the cross-sectional areas of the flow passages 310 is larger than the cross-sectional area of the air inlet pipe 210. Since the structure of the flow channel 310 may be irregular shapes other than a regular shape such as a circular hole, an elliptical hole, etc., it should be noted that the sectional area of the flow channel 310 is specifically the average sectional area between the first port 311 and the second port 312 of the flow channel 310.
In a preferred embodiment, the size of the first port 311 corresponds to the size of the second port 312, or alternatively, the size of the first port 311 is larger than the size of the second port 312. Flow guide 300 utilizes runner 310 to lead, oil-gas mixture can only pass through flow guide 300 through runner 310, consequently, oil gas discharges from intake pipe 210 and gets into separation chamber 101, reentrant runner 310 back atmospheric pressure increases, for further improvement water conservancy diversion effect, structural design is carried out at the inside or the end of runner 310, set up the size of first mouth 311 into the size that is greater than second mouth 312, can increase the atmospheric pressure in the runner 310, oil-gas mixture discharges and jets the inner wall of casing 100 from second mouth 312, higher gas flow makes oil gas easier to separate out.
Referring to fig. 2 and 3, in a preferred embodiment, the flow passages 310 are a plurality of flow passages arranged in a circular interval, and each flow passage 310 is inclined from the center of the flow guide 300 to the edge of the flow guide 300. The flow passages 310 are arranged in a plurality of numbers, the flow passages 310 are obliquely arranged, so that when an oil-gas mixture passes through, the axial direction of the separation cavity 101 is converted into the oblique direction, the length of the flow passages 310 is larger than the thickness of the flow guide part 300, and the separation effect is enhanced accordingly. And the gas is guided, so that the separated gas flows to the annular direction around the inner end of the gas outlet pipe 220, does not directly enter the gas outlet pipe 220, can enter the gas outlet pipe 220 after the gas flow is deflected again, and the possibility of discharging oil gas from the gas outlet pipe 220 is reduced in reply. The central line of the flow passage 310 and the axis of the air inlet pipe 210 form an included angle, the preferred included angle ranges from 10 degrees to 80 degrees, the inclined angle is too small in consideration of avoiding oil gas from entering the air outlet pipe 220 as much as possible, meanwhile, the air outlet pipe 220 is close to the flow guide piece 300, and the flow guide effect is not obvious at the moment and does not play an effective role; however, when the inclination angle of the flow channel 310 is too large, the gas coming out of the flow channel 310 may impact the inner wall of the housing 100, causing the housing 100 to vibrate. Therefore, the angle of the center line of the flow channel 310 is set to 10 ° to 80 °, and the above-mentioned problem caused by the improper angle setting is avoided.
The baffle 300 is installed in the housing 100 when the oil separator is assembled, and is generally made of an injection molding material or a sheet metal material, and if the injection molding material is used, an injection mold may be used for batch processing, and if the sheet metal material is used, the flow passage 310 may be obtained by cutting or casting.
Referring again to fig. 1, in a preferred embodiment, the inner end of the outlet tube 220 extends upward and is spaced from the baffle 300 by a distance of 0.5 to 5 times the diameter of the outlet tube 220. In this embodiment, the air outlet pipe 220 extends upward, and the maximum liquid level of the oil storage space increases with the increase of the air outlet pipe 220, thereby increasing the oil storage capacity. After the oil gas is discharged from the flow guide member 300, the gas flow is limited in the separation cavity 101 to generate multiple steering, and finally enters the gas outlet pipe 220, so that the oil-gas separation time and track are prolonged. The increase of the outlet pipe 220 also prolongs the path of the air flow to a certain extent, which is beneficial to optimizing the oil-gas separation effect. Because the sizes of different oil separators are different, the distance between the air outlet pipe 220 and the flow guide piece 300 can be adjusted according to the diameter of the air outlet pipe 220, the minimum is 0.5 times of the diameter of the air outlet pipe 220, the maximum is 5 times of the diameter of the air outlet pipe 220, if the distance is too small, turbulent flow is easy to occur at the inner port of the air outlet pipe 220 for gas, if the distance is too large, oil is gathered below the separation cavity 101 after flowing down from the flow guide piece 300, at the moment, the inner port of the air outlet pipe 220 is lower, the probability that the oil enters the air outlet pipe 220 is increased, the distance is set in the range, excessive turbulent flow of the oil gas is avoided, and most of the oil is also prevented from entering the air outlet pipe 220.
The above embodiment is an improvement from the structure of the flow guide 300 and the air outlet pipe 220 to improve the oil-gas separation efficiency, so that the oil-gas mixture discharged by the compressor is fully separated. The oil return structure of the oil separator is improved to return the lubricating oil in the oil storage space of the oil separator to the compressor.
In a preferred embodiment, a three-way valve 500 is disposed outside the casing 100, and the three-way valve 500 is connected to the casing 100 through a first oil return pipe 510 and a second oil return pipe 520, and is connected to a low pressure side of the compressor through a third oil return pipe 530. Unlike the conventional structure in which the return pipe is used to communicate the oil separator with the low-pressure side of the compressor, the three-way valve 500 is provided in the present embodiment, and the first oil return pipe 510 and the second oil return pipe 520 are independently opened or closed, so that the lubricating oil selectively opens the first oil return pipe 510 or the second oil return pipe 520 according to the operating condition of the compressor.
As the outdoor environment temperature is reduced, the time required from the start of cold accumulated liquid to the establishment of the exhaust superheat degree of the compressor is prolonged, and the oil return speed of the compressor is low under the low-temperature condition. Considering that the discharge amount of the lubricating oil is different under different operation conditions of the compressor, the problem of oil shortage inside the compressor is slight and serious. Further, in the above embodiment, the first oil return pipe 510 is provided with a first oil return port, the second oil return pipe 520 is provided with a second oil return port, the second oil return port is provided at the bottom of the oil storage space, and the first oil return port is higher than the second oil return port. In the embodiment, the first oil return port and the second oil return port are arranged at different positions of the oil storage space, and the second oil return port is positioned at the bottom of the oil storage space, so that the oil return amount is larger, and the compressor can be started when the compressor is seriously lack of oil; the first oil return opening can be discharged only after the oil in the oil storage space reaches a certain liquid level, and can be opened when the oil shortage problem of the compressor is slight.
Or further, in the above embodiment, the housing 100 is provided with the bracket 540, and the three-way valve 500 is provided on the outer side surface of the housing 100 through the bracket 540. The three-way valve 500 is provided on the outer surface of the casing 100 via the bracket 540, thereby reducing the influence of the vibration and temperature of the oil separator on the three-way valve 500. The three-way valve 500 is disposed on the bracket 540, the lengths of the first oil return pipe 510, the second oil return pipe 520 and the third oil return pipe 530 can be extended or shortened as required, and the pipe diameters can be enlarged or reduced as required, so that the bracket 540 has a better bearing effect on the three-way valve 500 compared with a case where the valve body is directly connected to the housing 100.
In a preferred embodiment, the outlet pipe 220 is provided with a low section 221, and both the inner port and the outer port of the outlet pipe 220 are higher than the low section 221. The ports at the two ends of the air outlet pipe 220 are higher than the low section 221, so that the flow direction of the oil-gas mixture is changed after the oil-gas mixture flows out of the air outlet pipe 220, and the oil-gas mixture can conveniently enter a subsequent heat exchanger such as a condenser.
Further, in the above-described embodiment, the lower section 221 is provided in a U-shape, an S-shape, or a wave-shape. In this embodiment, the low section 221 is set to be U-shaped, S-shaped, or wave-shaped, and the separation is achieved by the change of the gas flow direction, and the oil can be effectively prevented from flowing out of the outlet pipe 220.
In other embodiments, the oil separator housing 100 includes an upper cylinder 110 and a lower cylinder 120 connected to each other, and the upper cylinder 110 and the lower cylinder 120 are snap-fitted to facilitate assembly of related components such as the inlet pipe 210, the baffle 300, and the outlet pipe 220. In order to achieve the sealing performance of the upper cylinder 110 and the lower cylinder 120, a sealing structure may be used to ensure that the separation chamber 101 is isolated from the outside and can bear a larger air pressure.
In a second aspect, the present application further provides a heat exchange device, the heat exchange device includes a compressor, and the gas discharge pipe 200 of the compressor is provided with the oil separator with the above structure. The heat exchange device is used for refrigerating or heating, a working medium can be compressed by a compressor, and then heat exchange is completed through a condenser, an evaporator and the like. This application heat transfer device uses the oil separator of above-mentioned structure, in reducible oil gas gets into parts such as condenser, evaporimeter, still has all technological effects of above-mentioned oil separator, and the here is no longer repeated.
In a third aspect, the application further provides an electric appliance, which includes the oil separator with the above structure, or the heat exchange device with the above structure. The electric appliance of the invention generally needs heat exchange, such as equipment of a refrigerator, an air conditioner and the like, and also can be used for food fresh-keeping dining cars and the like, and is not limited to the equipment, but also suitable for other electric appliances with heat exchange requirements.
In a fourth aspect, the present application further provides a control method for an oil separator, which is applied to the oil separator with the above structure, and includes the following steps:
acquiring the starting time of a compressor;
acquiring the exhaust superheat degree of a compressor;
referring to fig. 1, if the compressor start time is lower than a predetermined time, or the compressor discharge superheat degree is lower than a predetermined temperature threshold, the first oil return pipe 510 and the third oil return pipe 530 are connected, and the third oil return pipe 530 is connected to the compressor;
referring to fig. 1, if the compressor start time is above a predetermined time or the compressor discharge superheat is above a predetermined temperature threshold, the second oil return pipe 520 and the third oil return pipe 530 are connected, and the third oil return pipe 530 is connected to the compressor.
In the control method, the oil return amount or the oil return speed to the compressor is adjusted according to the operation condition of the compressor: at the initial stage of operation of the compressor, namely when the starting time is short or the exhaust superheat degree is low, a large amount of oil gas is brought out, at the moment, in order to quickly supplement lubricating oil of the compressor, the first oil return pipe 510 is communicated with the third oil return pipe 530, the separated lubricating oil is discharged from the bottom and returned to the low-pressure side of the compressor, the oil return efficiency is improved, and the oil return amount is ensured; after the compressor operates normally, i.e. the starting time is longer or the exhaust superheat degree is higher, the discharged oil gas is less, the second oil return pipe 520 is communicated with the third oil return pipe 530, and the lubricating oil in the oil separator can be discharged and returned to the low-pressure side of the compressor after exceeding the second oil return pipe 520.
The preset time can be set to be 5-10min, the temperature in the middle of the condenser can be regarded as the saturation temperature corresponding to the actual condensing pressure, the exhaust superheat degree is the temperature difference between the exhaust side temperature of the compressor and the middle of the condenser, and the preset temperature threshold can be set to be 3-10 ℃.
According to the technical scheme of the invention, the oil return amount or the oil return speed to the compressor is adjusted according to the operation condition of the compressor: at the initial stage of operation of the compressor, namely when the starting time is short or the exhaust superheat degree is low, a large amount of oil gas is brought out, at the moment, in order to quickly supplement lubricating oil of the compressor, the first oil return pipe 510 is communicated with the third oil return pipe 530, the separated lubricating oil is discharged from the bottom and returned to the low-pressure side of the compressor, the oil return efficiency is improved, and the oil return amount is ensured; after the compressor operates normally, i.e. the starting time is longer or the exhaust superheat degree is higher, the discharged oil gas is less, the second oil return pipe 520 is communicated with the third oil return pipe 530, and the lubricating oil in the oil separator can be discharged and returned to the low-pressure side of the compressor after exceeding the second oil return pipe 520.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (13)
1. An oil separator, comprising:
the device comprises a shell (100), wherein a separation cavity (101) is arranged in the shell (100);
the gas pipe (200) comprises a gas inlet pipe (201) and a gas outlet pipe (202), the inner end of the gas inlet pipe (201) is communicated with the separation cavity (101), the outer end of the gas inlet pipe (201) is communicated with the compressor, the inner end of the gas outlet pipe (202) extends into the separation cavity (101), and the lower part of the separation cavity (101) forms an oil storage space; and the number of the first and second groups,
the flow guide piece (300) is connected to the inside of the shell (100) to divide the separation cavity (101), the flow guide piece (300) is located between the inner end of the air inlet pipe (201) and the inner end of the air outlet pipe (202), one or more flow passages (310) are arranged on the flow guide piece (300), each flow passage (310) comprises a first port (311) arranged on the first surface of the flow guide piece (300) and a second port (312) arranged on the second surface of the flow guide piece (300), the distance from the second port (312) to the inner wall of the shell (100) is smaller than the distance from the first port (311) to the inner wall of the shell (100), and the second port (312) is deviated from the inner end of the air outlet pipe (202).
2. The oil separator according to claim 1, further comprising an oil filter element (400), the oil filter element (400) being arranged in the separation chamber (101) and being interposed between the inner end of the inlet pipe (201) and the flow guide element (300).
3. The oil separator according to claim 1, characterized in that the sum of the cross-sectional areas of the flow passages (310) is greater than the cross-sectional area of the intake pipe (201).
4. -oil separator according to claim 1, characterised in that the size of the first port (311) corresponds to the size of the second port (312), or in that the size of the first port (311) is greater than the size of the second port (312).
5. The oil separator according to claim 1, wherein the flow passages (310) are arranged in an annular interval arrangement, and each flow passage (310) is inclined from the center of the flow guide member (300) to the edge of the flow guide member (300).
6. An oil separator according to claim 1, wherein the inner end of the outlet pipe (202) extends upwardly and is spaced from the deflector (300) by a distance of 0.5-5 times the diameter of the outlet pipe (202).
7. -oil separator according to claim 1, characterised in that the outside of the housing (100) is provided with a three-way valve (500), the three-way valve (500) being in communication with the housing (100) via a first oil return pipe (510) and a second oil return pipe (520), and with the low-pressure side of the compressor via a third oil return pipe (530).
8. The oil separator according to claim 7, wherein said first oil return pipe (510) is provided with a first oil return port, said second oil return pipe (520) is provided with a second oil return port, said second oil return port is provided at the bottom of said oil storage space, and said first oil return port is higher than said second oil return port.
9. The oil separator according to claim 7, characterized in that the housing (100) is provided with a bracket (540), the three-way valve (500) being provided on an outer side face of the housing (100) through the bracket (540).
10. An oil separator according to claim 1, characterized in that the outlet pipe (202) is provided with a low section (221), and both the inner and outer ports of the outlet pipe (202) are higher than the low section (221).
11. A heat exchange device, characterized in that it comprises a compressor, the discharge pipe of which is provided with an oil separator according to any one of claims 1-10, said discharge pipe communicating with said inlet pipe (201).
12. An electrical appliance comprising an oil separator as claimed in any one of claims 1 to 10, or a heat exchange device as claimed in claim 11.
13. A control method for an oil separator, applied to the oil separator of claim 7, comprising the steps of:
acquiring the starting time of a compressor;
acquiring the exhaust superheat degree of a compressor;
if the starting time of the compressor is lower than the preset time or the exhaust superheat degree of the compressor is lower than the preset temperature threshold, the first oil return pipe (510) is communicated with the third oil return pipe (530), and the third oil return pipe (530) is communicated with the compressor;
if the starting time of the compressor is above the preset time or the exhaust superheat degree of the compressor is above the preset temperature threshold, the second oil return pipe (520) is communicated with the third oil return pipe (530), and the third oil return pipe (530) is communicated with the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110838540.7A CN113465239A (en) | 2021-07-23 | 2021-07-23 | Oil separator, compressor, electric appliance, and method for controlling oil separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110838540.7A CN113465239A (en) | 2021-07-23 | 2021-07-23 | Oil separator, compressor, electric appliance, and method for controlling oil separator |
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| Publication Number | Publication Date |
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| CN113465239A true CN113465239A (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110838540.7A Pending CN113465239A (en) | 2021-07-23 | 2021-07-23 | Oil separator, compressor, electric appliance, and method for controlling oil separator |
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| CN110542251A (en) * | 2019-10-21 | 2019-12-06 | 南京天加环境科技有限公司 | Improved gas-liquid separator |
| CN215571412U (en) * | 2021-07-23 | 2022-01-18 | 珠海格力电器股份有限公司 | Oil separator, compressor, and electric appliance |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06300369A (en) * | 1993-04-19 | 1994-10-28 | Daikin Ind Ltd | Oil returning device for refrigerator with liquid-filled cooler |
| KR200264728Y1 (en) * | 2001-11-06 | 2002-02-20 | 주식회사 창성 | Accumulator |
| JP2006112672A (en) * | 2004-10-13 | 2006-04-27 | Fujitsu General Ltd | Accumulator for refrigeration device |
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| JP2012145251A (en) * | 2011-01-11 | 2012-08-02 | Hitachi Appliances Inc | Heat pump device |
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