CN112963888B - Cold oil starting method for compressor with waterless floor heating function multi-split air conditioner - Google Patents
Cold oil starting method for compressor with waterless floor heating function multi-split air conditioner Download PDFInfo
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- CN112963888B CN112963888B CN202110118837.6A CN202110118837A CN112963888B CN 112963888 B CN112963888 B CN 112963888B CN 202110118837 A CN202110118837 A CN 202110118837A CN 112963888 B CN112963888 B CN 112963888B
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- floor heating
- cold oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
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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
- F25B49/022—Compressor control arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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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)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a cold oil starting method of a compressor with a waterless floor heating function multi-split unit, which judges the temperature and the state of lubricating oil in the compressor according to the relationship among the environment temperature, the environment temperature and the oil temperature of the compressor and the shutdown time after heating shutdown; the lubricating oil-gas separation is controlled when the compressor is started through the starting revolution number of the compressor, the frequency of the stopping platform and the stopping time, the lubricating oil which takes the starting refrigerant out of the compressor to the oil separator returns to the inside of the compressor through the oil return capillary tube, and the compressor is quickly started in a cold oil state. The invention can ensure the safe and reliable operation of the compressor and avoid the compressor from being burnt out.
Description
Technical Field
The invention relates to a cold oil starting method for a compressor of a multi-split air conditioner with a waterless floor heating function.
Background
The waterless floor heating multi-connected unit is not only connected with a plurality of indoor units conventionally, but also needs to be connected with a plurality of sets of floor heating capillary tube network systems, the capillary tube network systems are that high-purity seamless red copper capillary tubes are adopted at the tail ends as floor heating coil pipes, the floor heating multi-connected unit works to directly send high-temperature refrigerants into copper tubes, the refrigerants condense and release heat in the copper tubes, and the process that the refrigerants exchange heat with water and are sent to water heating tubes after heating water is omitted compared with a water machine for double-connection supply.
However, for the waterless floor heating system, the technical difficulty is that the refrigerant can be added on site according to the actual indoor area, so that the floor heating capillary network also needs to use the refrigerant besides the refrigerant used by the conventional air conditioner; the lubricating oil in the compressor is on the upper layer of the refrigerant, so when the compressor is started, the lubricating oil is brought into an indoor system along with the refrigerant, and if the lubricating oil cannot be brought back to the compressor in time, the compressor is burnt out due to oil shortage.
Disclosure of Invention
Aiming at the problems, the invention provides a cold oil starting method for a compressor with a waterless floor heating function multi-split air conditioner, which effectively solves the problems pointed out in the background technology.
The technical scheme adopted by the invention is as follows:
a cold oil starting method for a compressor with a waterless floor heating function multi-split air conditioner comprises the following steps:
step (1): when the compressor is started, judging whether the cold oil starting condition is met or not, if so, performing the step (2), and if not, normally starting the compressor;
step (2): controlling the operating frequency of the compressor at a rate V 1 Rise to A 1 Then with A 1 Operating frequency of (T) operation 1 Judging whether a starting completion condition is met or not, if so, finishing the starting, and if not, performing the step (3);
and (3): controlling the operating frequency of the compressor at a rate V 2 Continue to increase to A 2 Then with A 2 Operating frequency of (1) operation T 2 Judging whether a starting completion condition is met or not, if so, finishing the starting, and if not, performing the step (4);
and (4): controlling the operating frequency of the compressor at a rate V 3 Continue to increase to A 3 Then with A 3 Operating frequency of (T) operation 3 Second, judging whether a starting completion condition is met or not, if so, finishing the starting, and if not, performing the step (5);
and (5): controlling the operating frequency of the compressor at a rate V 4 Continue to increase to A 4 Then with A 4 Operating frequency of (T) operation 4 Second, then whether the completion of the starting is satisfied is determinedAnd if the conditions are met, the starting is finished, and if the conditions are not met, the compressor is controlled to stop.
Preferably, the cold oil start condition at least satisfies any two of the following conditions: condition 1: the environmental temperature is less than or equal to 0 ℃; condition 2: the temperature of a bottom oil pool of the compressor is lower than the ambient temperature; condition 3: the compressor was stopped more than 4 hours from the last stop.
Preferably, the start-up completion condition is that any one of the following conditions is satisfied: condition 1: the superheat degree of the oil temperature of the compressor is more than or equal to 10 ℃, and the superheat degree of the oil temperature of the compressor is obtained by subtracting a saturation temperature value corresponding to high pressure from the temperature of an oil pool; condition 2: the exhaust superheat degree is more than or equal to 10 ℃, and the exhaust superheat degree is the exhaust temperature minus the saturation temperature value corresponding to high pressure.
Preferably, said V is 1 Is 4hz/s, A 1 30hz and T1 for 60s.
Preferably, said V is 2 Is 3hz/s, A 2 40hz, T2 50s.
Preferably, said V is 3 Is 2hz/s, A 3 50hz, and 40s for T3.
Preferably, said V is 4 Is 1hz/s, A 4 60hz, and T4 is 60s.
The temperature and the state of lubricating oil in the compressor are judged according to the relationship among the environment temperature, the environment temperature and the oil temperature of the compressor and the shutdown time after the heating shutdown; the lubricating oil-gas separation is controlled when the compressor is started through the starting revolution number of the compressor, the frequency of the stopping platform and the stopping time, and the lubricating oil which is taken out of the oil separator by the starting refrigerant of the compressor returns to the inside of the compressor through the oil return capillary tube, so that the safe and reliable operation of the compressor is ensured.
Drawings
FIG. 1 is a schematic diagram of the operation of the present invention;
fig. 2 is a schematic structural diagram of the multi-split air conditioner of the present invention.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Example 1
As shown in fig. 1 and 2, a method for starting cold oil of a compressor with a water-free floor heating function multi-split air conditioner comprises the following steps:
step (1): when the compressor is started, judging whether the cold oil starting condition is met, if so, performing the step (2), and if not, normally starting the compressor;
step (2): controlling the operating frequency of the compressor at a rate V 1 Rise to A 1 Then with A 1 Operating frequency of (T) operation 1 Second, judging whether a starting completion condition is met or not, if so, finishing the starting, and if not, performing the step (3);
and (3): controlling the operating frequency of the compressor at a rate V 2 Continue to increase to A 2 Then with A 2 Operating frequency of (1) operation T 2 Second, judging whether a starting completion condition is met or not, if so, finishing the starting, and if not, performing the step (4);
and (4): controlling the operating frequency of the compressor at a rate V 3 Continue to increase to A 3 Then with A 3 Operating frequency of (T) operation 3 Second, judging whether a starting completion condition is met or not, if so, finishing the starting, and if not, performing the step (5);
and (5): controlling the operating frequency of the compressor at a rate V 4 Go on to raise to A 4 Then with A 4 Operating frequency of (1) operation T 4 And secondly, judging whether the starting completion condition is met or not, if so, finishing the starting, and if not, controlling the compressor to stop so as to protect the compressor from being burnt out.
The cold oil starting condition at least meets any two of the following conditions: condition 1: the environmental temperature is less than or equal to 0 ℃; condition 2: the temperature of a bottom oil pool of the compressor is lower than the ambient temperature; condition 3: the compressor was more than 4 hours from the last shutdown.
The starting completion condition is that any one of the following conditions is satisfied: condition 1: the superheat degree of the oil temperature of the compressor is more than or equal to 10 ℃, and the superheat degree of the oil temperature of the compressor is obtained by subtracting a saturation temperature value corresponding to high pressure from the temperature of an oil pool; condition 2: the exhaust superheat degree is more than or equal to 10 ℃, and the exhaust superheat degree is the exhaust temperature minus the saturation temperature value corresponding to the high pressure.
The V is 1 Is 4hz/s, A 1 30hz and T1 for 60s.
The V is 2 Is 3hz/s, A 2 40hz, T2 50s.
The V is 3 Is 2hz/s, A 3 50hz, and T3 is 40s.
The V is 4 Is 1hz/s, A 4 60hz, T4 60s.
The temperature and the state of lubricating oil in the compressor are judged according to the relationship among the environment temperature, the environment temperature and the oil temperature of the compressor and the shutdown time after the heating shutdown; the lubricating oil-gas separation is controlled when the compressor is started through the starting revolution number of the compressor, the frequency of the stopping platform and the stopping time, and the lubricating oil which is taken out of the oil separator by the starting refrigerant of the compressor returns to the inside of the compressor through the oil return capillary tube, so that the safe and reliable operation of the compressor is ensured.
Finally, it should be noted that the above-mentioned list is only the specific embodiment of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (6)
1. A cold oil starting method for a compressor with a waterless floor heating function multi-split air conditioner is characterized by comprising the following steps:
step (1): when the compressor is started, judging whether the cold oil starting condition is met, if so, performing the step (2), and if not, normally starting the compressor;
step (2): controlling the operating frequency of the compressor at a rate V 1 Rise to A 1 Then with A 1 Operating frequency of (T) operation 1 Second, whether the starting completion condition is met is judged, if yes,finishing the starting, and if the starting is not satisfied, performing the step (3);
and (3): controlling the operating frequency of the compressor at a rate V 2 Go on to raise to A 2 Then with A 2 Operating frequency of (T) operation 2 Judging whether a starting completion condition is met or not, if so, finishing the starting, and if not, performing the step (4);
and (4): controlling the operating frequency of the compressor at a rate V 3 Go on to raise to A 3 Then with A 3 Operating frequency of (1) operation T 3 Judging whether a starting completion condition is met or not, if so, finishing the starting, and if not, performing the step (5);
and (5): controlling the operating frequency of the compressor at a rate V 4 Continue to increase to A 4 Then with A 4 Operating frequency of (T) operation 4 Judging whether a starting completion condition is met or not, if so, finishing starting, and if not, controlling the compressor to stop;
the starting completion condition is that any one of the following conditions is satisfied: condition 1: the superheat degree of the oil temperature of the compressor is more than or equal to 10 ℃; condition 2: the exhaust superheat degree is more than or equal to 10 ℃.
2. The cold oil starting method for the compressor with the waterless floor heating function multi-split air conditioner as claimed in claim 1, wherein the cold oil starting condition at least meets any two of the following conditions: condition 1: the environmental temperature is less than or equal to 0 ℃; condition 2: the temperature of the bottom oil pool of the compressor is lower than the ambient temperature; condition 3: the compressor was stopped more than 4 hours from the last stop.
3. The cold oil starting method for the compressor of the multi-split air conditioner with the waterless floor heating function as claimed in claim 1, wherein V is 1 Is 4hz/s, A 1 Is 30hz 1 Is 60s.
4. The pressure of the multifunctional air conditioner with waterless floor heating function as claimed in claim 1The cold oil starting method of the compressor is characterized in that V 2 Is 3hz/s, A 2 Is 40hz 2 Is 50s.
5. The cold oil starting method for the compressor of the multi-split air conditioner with the waterless floor heating function as claimed in claim 1, wherein V is 3 Is 2hz/s, A 3 Is 50hz, T 3 Was 40s.
6. The cold oil starting method for the compressor of the multi-split air conditioner with the waterless floor heating function as claimed in claim 1, wherein V is 4 Is 1hz/s, A 4 Is 60hz 4 Is 60s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110118837.6A CN112963888B (en) | 2021-01-28 | 2021-01-28 | Cold oil starting method for compressor with waterless floor heating function multi-split air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110118837.6A CN112963888B (en) | 2021-01-28 | 2021-01-28 | Cold oil starting method for compressor with waterless floor heating function multi-split air conditioner |
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| CN112963888B true CN112963888B (en) | 2022-12-23 |
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| CN113669784B (en) * | 2021-07-12 | 2022-11-25 | 浙江中广电器集团股份有限公司 | Control method for improving oil shortage of compressor during starting of waterless floor heating unit and triple co-generation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6048549B1 (en) * | 2015-08-07 | 2016-12-21 | ダイキン工業株式会社 | Refrigeration equipment |
| WO2017221300A1 (en) * | 2016-06-20 | 2017-12-28 | 三菱電機株式会社 | Air conditioner |
| CN107448376B (en) * | 2017-07-31 | 2019-05-31 | 广东美的暖通设备有限公司 | Frequency-changeable compressor and its raising frequency control method, device and air conditioner |
| CN107860161B (en) * | 2017-09-19 | 2019-08-27 | 珠海格力电器股份有限公司 | Compressor casing switching method, device, storage medium, compressor and equipment |
| CN107631430B (en) * | 2017-09-22 | 2020-09-25 | 青岛海尔空调器有限总公司 | Control method and system of air conditioner under low-temperature heating working condition |
| CN109990438B (en) * | 2019-03-25 | 2021-04-02 | 宁波奥克斯电气股份有限公司 | Control method for preheating of multi-split air conditioner compressor and multi-split air conditioner |
| CN110836552B (en) * | 2019-11-13 | 2021-09-07 | 广东美的暖通设备有限公司 | Starting method of heat pump system |
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Address after: 323000 No.96 Yunjing Road, Shuige Industrial Park, Lishui City, Zhejiang Province Applicant after: Zhejiang Zhongguang Electric Appliance Group Co.,Ltd. Address before: 323000 No.96 Yunjing Road, Shuige Industrial Park, Lishui City, Zhejiang Province Applicant before: ZHEJIANG ZHONGGUANG ELECTRIC APPLIANCES Co.,Ltd. |
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