CN215809509U - Big difference in height is with many online oil return systems - Google Patents
Big difference in height is with many online oil return systems Download PDFInfo
- Publication number
- CN215809509U CN215809509U CN202121122268.4U CN202121122268U CN215809509U CN 215809509 U CN215809509 U CN 215809509U CN 202121122268 U CN202121122268 U CN 202121122268U CN 215809509 U CN215809509 U CN 215809509U
- Authority
- CN
- China
- Prior art keywords
- oil
- air
- oil return
- split
- height difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004378 air conditioning Methods 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 239000003921 oil Substances 0.000 abstract description 103
- 239000010687 lubricating oil Substances 0.000 abstract description 31
- 238000009434 installation Methods 0.000 abstract description 6
- 239000003507 refrigerant Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 5
- 210000003437 trachea Anatomy 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Other Air-Conditioning Systems (AREA)
Abstract
The utility model relates to the technical field of multi-split air conditioners, in particular to a multi-split air conditioner oil return system for large height difference, which comprises an outdoor unit and an indoor unit, wherein an air conditioner compressor is arranged in the outdoor unit; all the oil collectors are connected with an oil return pump, and oil outlets of the oil return pump are connected with an oil inlet of the air-conditioning compressor. The multi-split air conditioner oil return system has the advantages that the oil collector is used for collecting liquid lubricating oil of each layer, the oil return pump is used for sending the collected liquid lubricating oil in the oil collector to the oil inlet of the air conditioner compressor, the problem that the air conditioner compressor is difficult to return oil due to the fact that the installation height difference of the outdoor unit and the indoor unit exceeds 50m can be solved, and when a multi-split air conditioner is used for refrigerating a building with the height exceeding 50m, a plurality of groups of multi-split air conditioners are not needed.
Description
Technical Field
The utility model relates to a multi-split air conditioner, in particular to a multi-split air conditioner oil return system for large altitude difference.
Background
The multi-split air conditioner is one type of central air conditioner, one outdoor unit is adopted to connect two or more indoor units through pipelines, different indoor units are arranged on the same floor or different floors, and different indoor units are connected in parallel; the air conditioner comprises an air conditioner compressor, a liquid pipe, an indoor unit and an air pipe, wherein the pipeline through which a gaseous refrigerant passes is the air pipe, the pipeline through which a liquid refrigerant passes is the liquid pipe, and the air conditioner compressor, the liquid pipe, the indoor unit and the air pipe form a closed loop for circulating the refrigerant; in the working process of the multi-split air conditioner, the air conditioner compressor is required to drive the refrigerant to complete the cycle process, and the refrigerant completes heat exchange in the indoor unit, so that the function of adjusting the indoor temperature is realized.
The air inlet, the air outlet and the oil inlet of the air-conditioning compressor are respectively used for sucking low-temperature and low-pressure gaseous refrigerant, discharging high-temperature and high-pressure gaseous refrigerant and sucking lubricating oil. In order to make the operation of the air-conditioning compressor more stable and reduce the noise of the air-conditioning compressor during operation, lubricating oil is added in the air-conditioning compressor, wherein a part of the lubricating oil can be changed into a gas state and participate in refrigerant circulation, the lubricating oil participating in the refrigerant circulation is changed into a liquid state at a condenser of an outdoor unit, if the liquid lubricating oil enters the air-conditioning compressor from an air inlet, liquid impact can be caused to damage the air-conditioning compressor, and therefore the lubricating oil entering the refrigerant circulation needs to be collected to avoid the liquid lubricating oil from entering the air inlet of the air-conditioning compressor.
In the refrigeration process, liquid lubricating oil and liquid refrigerant enter the indoor unit together, the refrigerant is changed into a gas state in the indoor unit, and the lubricating oil is still in the liquid state, so that the lubricating oil is separated from the gas refrigerant. If the height difference between the indoor unit and the outdoor unit is too large (greater than 50m), collected lubricating oil is not beneficial to returning to the air-conditioning compressor, so that oil return of the air-conditioning compressor is difficult, working noise of the air-conditioning compressor is too large due to poor lubrication in the working process, and the service life of the air-conditioning compressor is shortened, so that the installation height difference between the outdoor unit and the indoor unit of the multi-split air-conditioning unit is not more than 50m in the current practical use; if the multi-split air conditioner is used for refrigerating a building with the height higher than 50m, at least two sets of multi-split air conditioners are required to be arranged for refrigerating, and therefore the problems that the multi-split air conditioners occupy large floor space, increase noise and the like are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: the multi-split air conditioner oil return system for the large height difference is provided, aiming at the problems that in the prior art, when a building with the height of more than 50m is refrigerated by using multi-split air conditioners, at least two sets of multi-split air conditioners are needed due to the large height difference between an outdoor unit and an indoor unit, the space occupied by the multi-split air conditioners is large, noise is increased, and the like.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a multi-split oil return system for large height difference comprises an outdoor unit and indoor units, wherein air-conditioning compressors are arranged in the outdoor unit, the indoor units on the same floor are connected with the same oil collector, the oil collectors on adjacent floors are communicated through a second air pipe, and the oil collector on the uppermost layer is communicated with an air inlet of the air-conditioning compressor; all the oil collectors are connected with an oil return pump, and oil outlets of the oil return pump are connected with an oil inlet of the air-conditioning compressor.
According to the technical scheme, the oil collector is used for collecting the liquid lubricating oil of each layer, the oil return pump is used for sending the collected liquid lubricating oil in the oil collector to the oil inlet of the air-conditioning compressor, the problem that the oil return of the air-conditioning compressor is difficult under the condition that the installation height difference of the outdoor unit and the indoor unit exceeds 50m can be solved, when the multi-split air-conditioning unit is used for refrigerating a building with the height exceeding 50m, a plurality of groups of multi-split air-conditioning units are not needed, the space for installing the multi-split air-conditioning unit used for refrigerating is saved, the outdoor unit of the multi-split air-conditioning unit is not needed to be installed on a plurality of floors, and noise pollution is reduced.
As a preferable scheme of the utility model, oil outlets of all the oil return pumps are connected with the same oil storage tank, the oil storage tank is connected with an oil inlet of the air-conditioning compressor, and a constant pressure valve is arranged on the oil storage tank.
The liquid lubricating oil collected from each floor can be stored through setting up the oil storage tank, and through setting up the constant pressure valve, the pressure constancy of oil storage tank inside can be guaranteed, causes the impact to air condition compressor when avoiding lubricating oil to get into air condition compressor, leads to air condition compressor can not normally work.
As a preferable scheme of the utility model, liquid level sensors are arranged in the oil collectors, and the liquid level sensors are connected with a control circuit of the oil return pump.
The oil level sensor is arranged in the oil collector, so that the amount of lubricating oil in the oil collector can be detected, the oil level sensor is connected with the control circuit of the oil return pump, and the oil return pump starts to work when the lubricating oil in the oil collector reaches a certain amount and sends the lubricating oil in the oil collector to the oil storage tank. This scheme of adoption need not to go back the oil pump and be in operating condition always, also need not special personnel and monitor the volume of lubricating oil in the oil catcher for oil return system's work is energy-conserving more, high-efficient.
In a preferred embodiment of the present invention, the oil collector located at the uppermost floor of the building is connected to the air conditioner compressor through a third air pipe, and the third air pipe is provided with a non-return bend.
Gaseous refrigerant is high at the velocity of flow in the trachea, and through setting up the non return bend, can be mingled with the lubricating oil liquid drop in gaseous refrigerant on the inner wall of non return bend of gathering under the effect of centrifugal force, later fall into the oil catcher of below, avoid the lubricating oil liquid drop to get into air condition compressor from air condition compressor's air inlet.
As a preferable embodiment of the present invention, the outdoor unit is an air-cooled heat pump unit.
In a preferred embodiment of the present invention, the number of the outdoor units is at least 1.
Through setting up a plurality of indoor sets and can improving work efficiency, the air condition compressor oil return of being convenient for.
In a preferred embodiment of the present invention, the oil storage tank is installed on the same floor as the outdoor unit.
The oil storage tank and the outdoor unit are arranged on the same floor, so that the air conditioner compressor can conveniently suck lubricating oil in the oil storage tank, and the oil storage tank does not need to be installed on other floors.
In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:
(1) the power consumption of the compressor increased for oil return can be reduced by arranging the oil return pump, and the problem of difficult oil return of the multi-split air conditioner when the installation height difference of the indoor unit and the outdoor unit exceeds 50m is solved.
(2) A liquid level sensor is arranged in the oil collector and is electrically connected with the oil return pump through the liquid level sensor, so that the oil return pump can work according to the oil quantity in the oil collector, and the idle running of the oil return pump is avoided, and the electric energy is wasted.
(3) Through set up the constant pressure valve in the oil storage tank, can guarantee the inside constancy of pressure of oil storage tank, cause the damage to air condition compressor when avoiding liquid lubricating oil to get into air condition compressor.
(4) The anti-return bend prevents lubricating oil droplets entrained in the gaseous refrigerant from entering the air conditioning compressor from the air inlet.
Drawings
Fig. 1 is a schematic structural diagram of a multi-split oil return system of the utility model.
Icon: 1-an outdoor unit; 2-an indoor unit; 3-a first air pipe; 4-oil return pump; 5-preventing back bending; 6-a liquid pipe; 7-an oil collector; 71-a second trachea; 8-an oil storage tank; 9-a wire; 10-third trachea.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
A multi-split oil return system for large height difference can be used in the situation that the installation height difference between an outdoor unit 1 and an indoor unit 2 is larger than 50m, and at least two sets of multi-split air conditioners are avoided being used when multi-split air conditioners are used for refrigerating buildings with the height exceeding 50 m. The multi-split oil return system comprises an outdoor unit 1 and an indoor unit 2, wherein the outdoor unit 1 can adopt an air-cooled heat pump unit, and an air-conditioning compressor is installed in the outdoor unit 1; as shown in fig. 1, the indoor units 2 are installed on a plurality of floors, and the indoor units 2 are connected to the air-conditioning compressor in the outdoor unit 1 through liquid pipes 6. The indoor units 2 on the same floor are connected with the same oil collector 7 through the first air pipes 3, the oil collectors 7 connected with the indoor units 2 on different floors are communicated through the second air pipes 71, the oil collectors 7 positioned on the top are communicated with an air conditioner compressor through the third air pipes 10, the third air pipes 10 are integrally formed with the non-return bend 5, and the non-return bend 5 is in an inverted U shape. The oil collectors 7 of each layer are connected with the same oil storage tank 8 through pipelines, and a constant pressure valve is arranged on the oil storage tank 8. The oil storage tank 8 is connected with an oil inlet of the air-conditioning compressor through a pipeline, and the oil storage tank 8 can be arranged on the same floor of the outdoor unit 1, so that the air-conditioning compressor in the outdoor unit 1 can suck lubricating oil in the oil storage tank 8.
In order to facilitate the lubricating oil in the oil collector 7 to return to the oil storage tank 8 and then be sucked by the air conditioner compressor, the oil return pump 4 is arranged on a pipeline connecting the oil collector 7 and the oil storage tank 8, the oil collector 7 and the air conditioner compressor are connected through the oil return pump 4, and the lubricating oil in the oil collector 7 is sent into the oil storage tank 8 under the action of the oil return pump 4, so that the problem that the lubricating oil in a refrigerating circuit cannot return to the air conditioner compressor from an oil inlet of the air conditioner compressor due to the height difference of the installation of the outdoor unit 1 and the indoor unit 2 is solved. In order to better control the operation of the oil return pump 4 and save energy, a liquid level sensor can be arranged in the oil collector 7 and is connected with a control circuit of the oil return pump 4 through a lead 9, so that the starting of the oil return pump 4 is controlled according to the amount of lubricating oil in the oil collector 7, and the waste of electric energy caused by the continuous operation of the oil return pump 4 is avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A multi-split oil return system for large height difference comprises an outdoor unit (1) and indoor units (2), wherein air-conditioning compressors are arranged in the outdoor unit (1), and is characterized in that the indoor units (2) on the same floor are connected with the same oil collector (7), two oil collectors (7) between adjacent floors are communicated through a second air pipe (71), and the oil collector (7) on the uppermost floor of the floor is communicated with an air inlet of each air-conditioning compressor; all the oil collectors (7) are connected with an oil return pump (4), and oil outlets of the oil return pump (4) are connected with oil inlets of the air-conditioning compressor.
2. A multi-split oil return system for large height difference as claimed in claim 1, wherein oil outlets of all oil return pumps (4) are connected to the same oil storage tank (8), the oil storage tank (8) is connected to an oil inlet of the air conditioning compressor, and a constant pressure valve is arranged on the oil storage tank (8).
3. A multi-split oil return system for large height difference according to claim 1, wherein liquid level sensors are arranged in the oil collectors (7) and connected with a control circuit of the oil return pump (4).
4. A multi-split oil return system for large height difference according to claim 1, wherein the oil collector (7) positioned at the top of the floor is connected with the air conditioner compressor through a third air pipe (10), and a non-return bend (5) is arranged on the third air pipe (10).
5. A multi-split oil return system for large height difference as claimed in claim 1, wherein the outdoor unit (1) is an air-cooled heat pump unit.
6. A multi-split oil return system for large height difference as claimed in claim 1, wherein the number of the outdoor units (1) is at least 1.
7. A multi-split oil return system for large height difference as claimed in claim 2, wherein the oil storage tank (8) is installed on the same floor as the outdoor unit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121122268.4U CN215809509U (en) | 2021-05-24 | 2021-05-24 | Big difference in height is with many online oil return systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121122268.4U CN215809509U (en) | 2021-05-24 | 2021-05-24 | Big difference in height is with many online oil return systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215809509U true CN215809509U (en) | 2022-02-11 |
Family
ID=80173636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121122268.4U Expired - Fee Related CN215809509U (en) | 2021-05-24 | 2021-05-24 | Big difference in height is with many online oil return systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215809509U (en) |
-
2021
- 2021-05-24 CN CN202121122268.4U patent/CN215809509U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103216908B (en) | Control method for outdoor fan in refrigeration of variable frequency multi-split air-conditioning unit | |
| CN100395488C (en) | Multi-connected air conditioning unit with liquid pump to supply refrigerant | |
| CN211400153U (en) | Water-cooled power heat pipe multi-connected air conditioning system | |
| CN113944964A (en) | Air conditioning system | |
| CN215809509U (en) | Big difference in height is with many online oil return systems | |
| CN213272983U (en) | Heat pipe air conditioner all-in-one machine with air suction negative pressure device | |
| CN210980419U (en) | Multi-split air conditioner with hot water and floor heating | |
| CN116294320A (en) | High positive drop air conditioner initiative oil return system and air conditioner | |
| CN208846785U (en) | A kind of multimachine list twin-stage is mixed to beat net for air-source heat pump units | |
| CN218120237U (en) | Heat exchange system | |
| CN110748965A (en) | Air conditioning system and air conditioning system control method | |
| CN216203954U (en) | Air conditioning system | |
| CN215002211U (en) | Air conditioning system with condensate water recycling function | |
| CN212299165U (en) | Composite source split heat pump machine | |
| CN1464251A (en) | Air-conditioner | |
| CN211739528U (en) | Multi-split VRV device for machine room | |
| CN213955675U (en) | Multi-temperature-zone refrigerating system is with connecting in parallel unit of breathing in more | |
| CN205048776U (en) | Helical -lobe compressor parallel system for subway station | |
| CN210267812U (en) | Centralized condenser of integrated fluorine pump | |
| CN211146702U (en) | Air conditioning system | |
| CN203385240U (en) | Variable-frequency multi-connected machine with oil return structure | |
| CN2616717Y (en) | Compressor with oil balance tube | |
| CN112254382A (en) | Multi-connected power heat pipe air conditioner outdoor unit and control method | |
| CN2245744Y (en) | Cold accumulating air conditioner | |
| CN214746615U (en) | Multi-split oil return control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |