CN109916106A - A kind of heat pump air conditioner unit that can control lubricating oil temperature and its control method - Google Patents
A kind of heat pump air conditioner unit that can control lubricating oil temperature and its control method Download PDFInfo
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- CN109916106A CN109916106A CN201910336921.8A CN201910336921A CN109916106A CN 109916106 A CN109916106 A CN 109916106A CN 201910336921 A CN201910336921 A CN 201910336921A CN 109916106 A CN109916106 A CN 109916106A
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- lubricating oil
- solenoid valve
- compressor
- oil return
- oil
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- 239000010687 lubricating oil Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003921 oil Substances 0.000 claims abstract description 77
- 239000003507 refrigerant Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims description 30
- 238000001704 evaporation Methods 0.000 claims description 15
- 230000008020 evaporation Effects 0.000 claims description 13
- 238000004378 air conditioning Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000003134 recirculating effect Effects 0.000 abstract description 3
- 238000010992 reflux Methods 0.000 abstract description 2
- 238000010977 unit operation Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to heat pump air conditioner units and its control method that one kind can control lubricating oil temperature, including compressor, oil eliminator, four-way valve, outdoor heat exchanger, outdoor unit electric expansion valve, gas-liquid separator and cooler etc., flow into the lubricating oil being separated in the oil eliminator in the cooler, and heat exchange is carried out with the refrigerant for flowing through the heat exchanger tube and is cooled down, compressor is flowed back to again, to, the lubricating oil temperature and recirculating oil quantity of reflux compressor can be controlled in time and accurately, eliminate the security risk for endangering compressor, improve the safety and reliability of unit operation.
Description
Technical field
The present invention relates to a kind of air-conditioning system, especially a kind of heat pump air conditioner unit and its control method, specifically
A kind of heat pump air conditioner unit that can control lubricating oil temperature and its control method.
Background technique
With popularizing for air-conditioning system, hot weather continuous days temperature is increasingly longer, and air-conditioning work environment is also more next
More severe, the operating reliability of air-conditioning is more important under hot environment.When lubricating oil is in for a long time, hot environment is rotten to be deteriorated
Lubricating action is lost, the oil film of formation is excessive rarefied to protect compressor inside, in turn result in bearing of compressor mill
Damage, scroll plate card cylinder.These can all be affected user experience, and endangered the reliability of air-conditioning, shortened the working life.Currently, existing
Some return oil system majorities are followed by capillary-compensated using oil eliminator, can not control returning-oil temperature, thus, it is anxious
It need to solve the control problem of lubricating oil temperature.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide the heat pump air conditioners that one kind can control lubricating oil temperature
Unit and its control method can control reflux compressor according to air-conditioning system operating status and environment in time and accurately
Lubricating oil temperature eliminates the security risk for endangering compressor, keeps unit safe and reliable to operation.
The technical scheme is that
A kind of heat pump air conditioner unit that can control lubricating oil temperature, including outdoor unit and indoor unit, the outdoor unit and indoor unit
Between be connected with tracheae by liquid pipe；The outdoor unit includes by compressor, oil eliminator, four-way valve, outdoor heat exchanger, outdoor
The refrigerant circulation loop that machine electric expansion valve and gas-liquid separator are constituted；It further include cooler, which includes refrigerant
Side-entrance, refrigerant evaporation side outlet, lubricating oil outlet and lubricating oil inlet are evaporated, is internally provided with and the cryogen evaporation side
The heat exchanger tube that import is connected with refrigerant evaporation side outlet；What the refrigerant evaporation side-entrance was serially connected by pipeline process
The liquid pipe is connected to after cooling electric expansion valve and cooling solenoid valve；The refrigerant evaporation side outlet is arrived by piping connection
The gas-liquid separator of air-conditioning；The lubricating oil outlet passes through piping connection to the oil eliminator bottom of air-conditioning；The lubricating oil into
Mouth is connected to the air entry of the compressor by pipeline after main oil return solenoid valve, makes to be separated in the oil eliminator
Lubricating oil flow into the cooler, and carry out heat exchange with the refrigerant for flowing through the heat exchanger tube and cool down, then flow back to pressure
Contracting machine；The oil eliminator is connected on the pipeline between the gas-liquid separator and compressor by oil return pipe, and in this time
Oil pipe is equipped with auxiliary oil return solenoid valve, can carry out reinforcement oil return to compressor.
Further, the first temperature sensor is equipped at the lubricating oil inlet；The air entry of the compressor is equipped with the
Two temperature sensors；The oil return pipe is equipped with third temperature sensor.
A kind of control method for the air-conditioner set that can control lubricating oil temperature, it is characterized in that the following steps are included:
1) original state, cooling electric expansion valve and cooling solenoid valve are to close, and main oil return solenoid valve is opened, auxiliary oil return electromagnetism
Valve is closed；
2) enter the lubricating oil temperature T1 of cooler by the detection of the first temperature sensor；
3) if 100 DEG C of T1 > open cooling solenoid valve, and open cooling electric expansion valve to initial opening 100P；It is no
Then, return step 2)；
4) the lubricating oil temperature T2 of compressor is returned by second temperature sensor detection stream；Calculate Δ T=T1-T2；
5) the every 40S of electric expansion valve being cooled down if 0 DEG C of Δ T > and opening big 8P, maximum is opened to 480P；Otherwise, keep cooling electronics swollen
The current aperture of swollen valve；
6) T1 is continued to test；
7) the every 40S of electric expansion valve is cooled down if 95 DEG C of T1 < and reduces 8P, and minimum is opened to 100P；Otherwise, it goes to step 5)；
8) T1 is continued to test；
If 9) 90 DEG C of T1 <, cooling electric expansion valve and cooling solenoid valve are closed；Otherwise, it goes to step 6).
10) return step 1).
It further, further include reinforcing oil return process, method are as follows: the auxiliary oil return solenoid valve is enabled every two hours to open one
It is secondary, and carry out as follows:
A) auxiliary oil return solenoid valve is opened, the lubricating oil temperature T3 of oil return pipe end is detected by third temperature sensor；
If b) 15 DEG C of T3-T2 >, and 50 DEG C of T2 >, then it is gone to step c) after keeping it turning on auxiliary oil return solenoid valve 2min；Otherwise, turn step
It is rapid d)；
C) T3 is continued to test, 5 DEG C of T3-T2 <, then auxiliary oil return solenoid valve is closed, otherwise goes to step d).
D) it is closed after keeping it turning on the auxiliary oil return solenoid valve 4min.
Beneficial effects of the present invention:
The present invention has rational design, easy to implement, can be controlled back in time and accurately according to air-conditioning system operating status and environment
Flow the lubricating oil temperature and recirculating oil quantity of compressor, eliminate and endanger the security risk of compressor, improve unit operation safety and
Reliability.
Detailed description of the invention
Fig. 1 is system structure diagram of the invention.
Wherein: 1- compressor；2- oil eliminator；3- four-way valve；4- outdoor unit heat exchanger；5- indoor unit；6- gas-liquid separation
Device；7- cooler；The main oil return solenoid valve of 8-；The auxiliary oil return solenoid valve of 9-；10- outdoor unit electric expansion valve；11- cools down electronic expansion
Valve；12- cools down solenoid valve；The first temperature sensor of 13-；14- second temperature sensor；15- third temperature sensor；16- liquid
Pipe；17- tracheae.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 1.
A kind of heat pump air conditioner unit that can control lubricating oil temperature, including outdoor unit and indoor unit 5, the outdoor unit and room
It is connected by liquid pipe 16 with tracheae 17 between interior machine 5；The outdoor unit includes by compressor 1, oil eliminator 2, four-way valve 3, room
The refrigerant circulation loop that external heat exchanger 4, outdoor unit electric expansion valve 10 and gas-liquid separator 6 are constituted.It further include cooler 7,
The cooler 7 includes that refrigerant evaporates side-entrance, refrigerant evaporation side outlet, lubricating oil outlet and lubricating oil inlet, inside
Equipped with the heat exchanger tube for evaporating side-entrance with the cryogen and refrigerant evaporation side outlet is connected.The refrigerant evaporation side-entrance is logical
It crosses pipeline and is connected to the liquid pipe 16 after the cooling electric expansion valve 11 and cooling solenoid valve 12 that are serially connected.The refrigeration
Agent evaporates side outlet and passes through piping connection to the gas-liquid separator 6.The lubricating oil outlet passes through piping connection to the oil
2 bottom of separator；The lubricating oil inlet is connected to the air entry of the compressor 1 by pipeline after main oil return solenoid valve 8,
Flow into the lubricating oil being separated in the oil eliminator 2 in the cooler 7, and with the refrigeration that flows through the heat exchanger tube
Agent carries out heat exchange and cools down, then flows back to compressor 1；Preferably, which can select the plate heat exchanger of Danvers,
Model B3-014-20-4.5-H.
The oil eliminator 2 is connected on the pipeline between the gas-liquid separator 6 and compressor 1 by oil return pipe, and
It is equipped with auxiliary oil return solenoid valve 9 on the oil return pipe, reinforcement oil return can be carried out to compressor 1.
The first temperature sensor 13, the detectable profit flowed out from the oil eliminator 2 are equipped at the lubricating oil inlet
The temperature of lubricating oil.The air entry of the compressor 1 is equipped with second temperature sensor 14, the detectable profit for flowing back to the compressor 1
Oil temperature.The oil return pipe is equipped with third temperature sensor 15, during survey can be added to reinforce oil return, from the oil eliminator 2
The temperature of the lubricating oil of middle outflow.
When the present invention is run, refrigerant is compressed into the refrigerant of high temperature and pressure within the compressor, and in compressor
Parts of lubricating oil enters oil eliminator together.After oil eliminator separates, the lubricating oil in bottom enters cooler, passes through
Temperature returns to compressor after adjusting.Refrigerant enters four-way valve after oil eliminator is discharged, and after outdoor unit heat exchanger is cooling, passes through
Liquid pipe enters the room machine, then is entered in gas-liquid separator after four-way valve by tracheae and carry out gas-liquid separation, finally, gaseous state system
Cryogen, which returns to, to be restarted to recycle in compressor.
Wherein, cooler obtains cooling capacity by evaporating the refrigerant that cooling electric expansion valve comes, with lubricating oil therein into
Row heat exchange controls the temperature of lubricating oil.It, can be with meanwhile by controlling main oil return solenoid valve and auxiliary oil return solenoid valve
Control recirculating oil quantity, it is ensured that compressor safe operation.
Specifically, one kind of the present invention can control the control method of the air-conditioner set of lubricating oil temperature, comprising the following steps:
1) original state, cooling electric expansion valve and cooling solenoid valve are to close, and main oil return solenoid valve is opened, auxiliary oil return electromagnetism
Valve is closed；
2) enter the lubricating oil temperature T1 of cooler by the detection of the first temperature sensor；
3) if 100 DEG C of T1 > open cooling solenoid valve, and open cooling electric expansion valve to initial opening 100P；It is no
Then, return step 2)；
4) the lubricating oil temperature T2 of compressor is returned by second temperature sensor detection stream；Calculate Δ T=T1-T2；
5) the every 40S of electric expansion valve being cooled down if 0 DEG C of Δ T > and opening big 8P, maximum is opened to 480P；Otherwise, keep cooling electronics swollen
The current aperture of swollen valve；
6) T1 is continued to test；
7) the every 40S of electric expansion valve is cooled down if 95 DEG C of T1 < and reduces 8P, and minimum is opened to 100P；Otherwise, it goes to step 5)；
8) T1 is continued to test；
If 9) 90 DEG C of T1 <, cooling electric expansion valve and cooling solenoid valve are closed；Otherwise, it goes to step 6).
10) return step 1).
In order to guarantee the safe operation of compressor, the invention also includes reinforce oil return process, method are as follows: enable described auxiliary time
Solenoid is every two hours opened once, and is carried out as follows:
A) auxiliary oil return solenoid valve is opened, the lubricating oil temperature T3 of oil return pipe end is detected by third temperature sensor；
If b) 15 DEG C of T3-T2 >, and 50 DEG C of T2 >, then it is gone to step c) after keeping it turning on auxiliary oil return solenoid valve 2min；Otherwise, turn step
It is rapid d)；
C) T3 is continued to test, 5 DEG C of T3-T2 <, then auxiliary oil return solenoid valve is closed, otherwise goes to step d).
D) it is closed after keeping it turning on the auxiliary oil return solenoid valve 4min.
Part that the present invention does not relate to is the same as those in the prior art or can be realized by using the prior art.
Claims (4)
1. one kind can control the heat pump air conditioner unit of lubricating oil temperature, including outdoor unit and indoor unit, the outdoor unit and interior
It is connected by liquid pipe with tracheae between machine；The outdoor unit includes by compressor, oil eliminator, four-way valve, outdoor heat exchanger, room
The refrigerant circulation loop that outer machine electric expansion valve and gas-liquid separator are constituted, it is characterized in that further include cooler, the cooler
Including refrigerant evaporation side-entrance, refrigerant evaporation side outlet, lubricating oil outlet and lubricating oil inlet, be internally provided with it is described
Cryogen evaporates the heat exchanger tube that side-entrance is connected with refrigerant evaporation side outlet；The refrigerant evaporation side-entrance is passed through by pipeline
The liquid pipe is connected to after the cooling electric expansion valve and cooling solenoid valve that are serially connected；The refrigerant evaporation side outlet passes through
Gas-liquid separator of the piping connection to air-conditioning；The lubricating oil outlet passes through piping connection to the oil eliminator bottom of air-conditioning；Institute
The air entry that lubricating oil inlet is connected to the compressor by pipeline after main oil return solenoid valve is stated, is made in the oil eliminator
The lubricating oil being separated flows into the cooler, and carries out heat exchange with the refrigerant for flowing through the heat exchanger tube and drop
Temperature, then flow back to compressor；The oil eliminator is connected to the pipeline between the gas-liquid separator and compressor by oil return pipe
On, and auxiliary oil return solenoid valve is equipped on the oil return pipe, reinforcement oil return can be carried out to compressor.
2. the heat pump air conditioner unit according to claim 1 that lubricating oil temperature can be controlled, it is characterized in that the lubricating oil
Entrance is equipped with the first temperature sensor；The air entry of the compressor is equipped with second temperature sensor；It is set on the oil return pipe
There is third temperature sensor.
3. a kind of control method of the air-conditioner set according to claim 1 that can control lubricating oil temperature, it is characterized in that
The following steps are included:
1) original state, cooling electric expansion valve and cooling solenoid valve are to close, and main oil return solenoid valve is opened, auxiliary oil return electromagnetism
Valve is closed；
2) enter the lubricating oil temperature T1 of cooler by the detection of the first temperature sensor；
3) if 100 DEG C of T1 > open cooling solenoid valve, and open cooling electric expansion valve to initial opening 100P；It is no
Then, return step 2)；
4) the lubricating oil temperature T2 of compressor is returned by second temperature sensor detection stream；Calculate Δ T=T1-T2；
5) the every 40S of electric expansion valve being cooled down if 0 DEG C of Δ T > and opening big 8P, maximum is opened to 480P；Otherwise, keep cooling electronics swollen
The current aperture of swollen valve；
6) T1 is continued to test；
7) the every 40S of electric expansion valve is cooled down if 95 DEG C of T1 < and reduces 8P, and minimum is opened to 100P；Otherwise, it goes to step 5)；
8) T1 is continued to test；
If 9) 90 DEG C of T1 <, cooling electric expansion valve and cooling solenoid valve are closed；Otherwise, it goes to step 6)；
10) return step 1).
4. the control method of the air-conditioner set according to claim 3 that lubricating oil temperature can be controlled, it is characterized in that also wrapping
It includes and reinforces oil return process, method are as follows: enable the auxiliary oil return solenoid valve every two hours open once, and carry out as follows:
A) auxiliary oil return solenoid valve is opened, the lubricating oil temperature T3 of oil return pipe end is detected by third temperature sensor；
If b) 15 DEG C of T3-T2 >, and 50 DEG C of T2 >, then it is gone to step c) after keeping it turning on auxiliary oil return solenoid valve 2min；Otherwise, turn step
It is rapid d)；
C) T3 is continued to test, 5 DEG C of T3-T2 <, then auxiliary oil return solenoid valve is closed, otherwise goes to step d)；
D) it is closed after keeping it turning on the auxiliary oil return solenoid valve 4min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910336921.8A CN109916106B (en) | 2019-04-25 | 2019-04-25 | Heat pump air conditioner unit capable of controlling temperature of lubricating oil and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910336921.8A CN109916106B (en) | 2019-04-25 | 2019-04-25 | Heat pump air conditioner unit capable of controlling temperature of lubricating oil and control method thereof |
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| CN109916106A true CN109916106A (en) | 2019-06-21 |
| CN109916106B CN109916106B (en) | 2024-02-27 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411054A (en) * | 2019-07-09 | 2019-11-05 | 南京天加环境科技有限公司 | A kind of combustion-gas thermal pump air-conditioning system reducing lubricating oil temperature and control method |
| CN110411065A (en) * | 2019-07-24 | 2019-11-05 | 南京天加环境科技有限公司 | A kind of multi-connected machine method for controlling oil return |
| CN111811112A (en) * | 2020-07-13 | 2020-10-23 | 南京天加环境科技有限公司 | Intelligent oil return multi-split air conditioner system |
| CN113654275A (en) * | 2021-08-26 | 2021-11-16 | 浙江吉利控股集团有限公司 | Device and method for preventing oil shortage of compressor and integrated gas-liquid separator |
| CN114440489A (en) * | 2020-12-28 | 2022-05-06 | 中科广能能源研究院(重庆)有限公司 | Gas heat pump multi-connected unit air conditioning system and control method thereof |
| CN115143555A (en) * | 2022-06-30 | 2022-10-04 | 青岛海信日立空调系统有限公司 | Air conditioner System |
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| CN202521932U (en) * | 2012-04-11 | 2012-11-07 | 珠海格力电器股份有限公司 | Cooling system of screw unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411054A (en) * | 2019-07-09 | 2019-11-05 | 南京天加环境科技有限公司 | A kind of combustion-gas thermal pump air-conditioning system reducing lubricating oil temperature and control method |
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| CN110411065A (en) * | 2019-07-24 | 2019-11-05 | 南京天加环境科技有限公司 | A kind of multi-connected machine method for controlling oil return |
| CN111811112A (en) * | 2020-07-13 | 2020-10-23 | 南京天加环境科技有限公司 | Intelligent oil return multi-split air conditioner system |
| CN111811112B (en) * | 2020-07-13 | 2021-11-16 | 南京天加环境科技有限公司 | Intelligent oil return multi-split air conditioner system |
| CN114440489A (en) * | 2020-12-28 | 2022-05-06 | 中科广能能源研究院(重庆)有限公司 | Gas heat pump multi-connected unit air conditioning system and control method thereof |
| CN114440489B (en) * | 2020-12-28 | 2023-11-07 | 中科广能能源研究院(重庆)有限公司 | Air conditioning system of gas heat pump multi-unit and control method thereof |
| CN113654275A (en) * | 2021-08-26 | 2021-11-16 | 浙江吉利控股集团有限公司 | Device and method for preventing oil shortage of compressor and integrated gas-liquid separator |
| CN113654275B (en) * | 2021-08-26 | 2023-08-22 | 浙江吉利控股集团有限公司 | Device and method for preventing oil shortage of compressor and integrated gas-liquid separator |
| CN115143555A (en) * | 2022-06-30 | 2022-10-04 | 青岛海信日立空调系统有限公司 | Air conditioner System |
| CN115143555B (en) * | 2022-06-30 | 2023-08-08 | 青岛海信日立空调系统有限公司 | Air conditioning system |
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