CN114151874A - Multi-split low-temperature starting device and control method - Google Patents
Multi-split low-temperature starting device and control method Download PDFInfo
- Publication number
- CN114151874A CN114151874A CN202111259181.6A CN202111259181A CN114151874A CN 114151874 A CN114151874 A CN 114151874A CN 202111259181 A CN202111259181 A CN 202111259181A CN 114151874 A CN114151874 A CN 114151874A
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- compressor
- temperature
- electromagnetic heating
- exhaust
- heating device
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 238000010257 thawing Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 12
- 239000010687 lubricating oil Substances 0.000 abstract description 8
- 239000003507 refrigerant Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000010726 refrigerant oil Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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
-
- 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
-
- 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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a multi-split low-temperature starting device and a control method, wherein an electromagnetic heating device is used for heating an exhaust pipeline of a compressor, so that the temperature of a mixture of a refrigerant and lubricating oil in the exhaust pipeline is increased when the exhaust temperature is low and the exhaust superheat degree of the compressor is insufficient, a small amount of lubricating oil is dissolved in the refrigerant, the separation effect of an oil separator is ensured, the lubricating oil returning to the compressor is sufficient, and the normal operation of a system is further ensured. The invention greatly shortens the heating starting speed of the multi-split air conditioner, and simultaneously can improve the heating capacity of the system and the stability and the safety of the system.
Description
Technical Field
The invention relates to a multi-split low-temperature starting device and a control method.
Background
The compressor refrigerating machine oil is an indispensable substance for ensuring the normal operation of the compressor, and the low-temperature solubility of the lubricating oil and the refrigerant is higher, so that the lubricating oil is more quickly discharged from the compressor when the unit is started at a low environmental temperature for the first time and can not be better separated by the oil to cause the oil shortage phenomenon of the compressor.
Because the multi-split air supply system is obviously not ideal even if the middle air supply technology is added, a plurality of manufacturers further improve the heating capacity by adopting an indoor unit heating mode, but the safety is influenced, the air supply quantity of the indoor unit is blocked by electric heating under the refrigeration working condition, the indoor unit is easy to condense and drip water, and meanwhile, the low control evaporation temperature causes insufficient air suction quantity of the compressor during low-temperature heating operation, so that the high temperature of the compressor is easy to cause, and the normal operation of the system is influenced.
Disclosure of Invention
In view of the above problems, the present invention provides a multi-split low temperature start device and a control method thereof, which effectively solve the problems pointed out in the background art.
The technical scheme adopted by the invention is as follows:
a multi-split low-temperature starting device comprises a compressor, an electromagnetic heating device, an oil separator, a four-way valve, an indoor unit heat exchanger, an indoor unit electronic expansion valve, an outdoor unit heat exchanger, a gas-liquid separator, an economizer and an air supply electronic expansion valve, wherein the electromagnetic heating device is arranged on an exhaust pipeline between the compressor and the oil separator.
Preferably, the electromagnetic heating device comprises an exhaust pipe inlet, an electromagnetic heating coil and an exhaust pipe outlet which are fixed on the bracket.
The electromagnetic heating device adopts the mode that the electromagnetic heating coil is fixed on the exhaust pipeline to heat, so that the original refrigeration pipeline is not changed, the negative influence of the electromagnetic heating device on the original system is avoided, and the electromagnetic heating device is simple in structure and convenient to install.
Preferably, a first exhaust temperature sensor and a high-pressure sensor are arranged on an exhaust pipe between the compressor and the electromagnetic heating device, and a second exhaust temperature sensor is arranged at an outlet of the exhaust pipe of the electromagnetic heating device.
Preferably, a thermistor is arranged in the electromagnetic heating device.
Meanwhile, the invention also provides a multi-online low-temperature start control method, which comprises the following steps: after the multi-split air conditioner is started, the exhaust temperature TH of the compressor is detected through the first exhaust temperature sensor1The second exhaust temperature sensor detects the exhaust temperature TH after the electromagnetic heating device heats2Detecting the exhaust pressure HP of the compressor by the high-pressure sensor, calculating the saturation temperature Thp corresponding to the current exhaust pressure HP, and if the starting running time of the compressor is less than 1h or within 10min after oil return and defrosting are finished, if TH is less than1Starting the electromagnetic heating device when the Thp is less than 10 ℃, and when the starting running time of the compressor is more than or equal to 1h or oil return and defrosting are finished for 10min or TH1-Thp > 20 ℃ or compressor discharge temperature TH1And when the temperature is higher than 75 ℃, the electromagnetic heating device is closed.
The electromagnetic heating device is used for heating the exhaust pipeline of the compressor, so that the temperature of a mixture of the refrigerant and the lubricating oil in the exhaust pipeline is increased when the exhaust temperature is low and the exhaust superheat degree of the compressor is insufficient, the lubricating oil is slightly dissolved in the refrigerant, the separation effect of the oil separator is ensured, the lubricating oil returning to the compressor is sufficient, the normal operation of the system is further ensured, the heating starting speed of the multi-split air conditioner is greatly shortened, the heating capacity of the system can be increased, and the stability and the safety of the system are improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural diagram of the electromagnetic heating device.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1 and 2, the multi-split low-temperature starting device comprises a compressor 1, an electromagnetic heating device 2, an oil separator 3, a four-way valve 4, an indoor unit heat exchanger 5, an indoor unit electronic expansion valve 6, an outdoor unit electronic expansion valve 7, an outdoor unit heat exchanger 8, a gas-liquid separator 9, an economizer 10 and an air supply electronic expansion valve 11, wherein the electromagnetic heating device 2 is arranged on an exhaust pipeline between the compressor 1 and the oil separator 3.
The electromagnetic heating device 2 comprises an exhaust pipe inlet 22, an electromagnetic heating coil 23 and an exhaust pipe outlet 24 which are fixed on a bracket 21.
A first exhaust temperature sensor 12 and a high-pressure sensor 13 are arranged on an exhaust pipe between the compressor 1 and the electromagnetic heating device 2, and a second exhaust temperature sensor 14 is arranged on an exhaust pipe outlet 24 of the electromagnetic heating device 2.
A thermistor is arranged in the electromagnetic heating device 2.
For the device, the invention provides a multi-split low-temperature start control method, which comprises the following steps: after the multi-split air conditioner is started, the exhaust temperature TH of the compressor 1 is detected by the first exhaust temperature sensor 121The second exhaust gas temperature sensor 14 detects the exhaust gas temperature TH after the electromagnetic heating device 2 heats2The high-pressure sensor 13 detects the exhaust pressure HP of the compressor 1, calculates the saturation temperature Thp corresponding to the current exhaust pressure HP, and if the starting operation time of the compressor 1 is less than 1h or within 10min after oil return and defrosting, if TH is finished1The Thp is less than 10 ℃, the electromagnetic heating device 2 is started, and when the starting running time of the compressor 1 is more than or equal to 1h or oil return and defrosting are finished for 10min or TH1-Thp > 20 ℃ or compressor discharge temperature TH1And when the temperature is higher than 75 ℃, the electromagnetic heating device 2 is closed.
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 (5)
1. The multi-split low-temperature starting device is characterized by comprising a compressor (1), an electromagnetic heating device (2), an oil separator (3), a four-way valve (4), an indoor unit heat exchanger (5), an indoor unit electronic expansion valve (6), an outdoor unit electronic expansion valve (7), an outdoor unit heat exchanger (8), a gas-liquid separator (9), an economizer (10) and an air supply electronic expansion valve (11), wherein the electromagnetic heating device (2) is arranged on an exhaust pipeline between the compressor (1) and the oil separator (3).
2. A multi-split cold start device as defined in claim 1, wherein said electromagnetic heating means (2) comprises an exhaust pipe inlet (22), an electromagnetic heating coil (23) and an exhaust pipe outlet (24) fixed to a support (21).
3. A multi-split low-temperature starting device as claimed in claim 2, wherein a first exhaust temperature sensor (12) and a high-pressure sensor (13) are arranged on an exhaust pipe between the compressor (1) and the electromagnetic heating device (2), and a second exhaust temperature sensor (14) is arranged on an exhaust pipe outlet (24) of the electromagnetic heating device (2).
4. A multi-split low-temperature starting device as claimed in claim 3, wherein a thermistor is arranged in the electromagnetic heating device (2).
5. A multi-split low-temperature start control method is characterized by comprising the following steps: after the multi-split air conditioner is started, the exhaust temperature TH of the compressor (1) is detected through the first exhaust temperature sensor (12)1The second exhaust temperature sensor (14) detects the exhaust temperature TH after the electromagnetic heating device (2) heats2The high-pressure sensor (13) detects the exhaust pressure HP of the compressor (1), calculates the saturation temperature Thp corresponding to the current exhaust pressure HP, and when the starting running time of the compressor (1) is less than 1h or within 10min after oil return and defrosting are finished, if TH is less than 1h1-Thp < 10 ℃, starting the electromagnetic heating device (2), and when the starting running time of the compressor (1) is more than or equal to 1h or oil return and defrosting are finished for 10min or TH1-Thp > 20 ℃ or compressor discharge temperature TH1When the temperature is higher than 75 ℃, the electromagnetic heating device (2) is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111259181.6A CN114151874A (en) | 2021-10-28 | 2021-10-28 | Multi-split low-temperature starting device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111259181.6A CN114151874A (en) | 2021-10-28 | 2021-10-28 | Multi-split low-temperature starting device and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114151874A true CN114151874A (en) | 2022-03-08 |
Family
ID=80458394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111259181.6A Pending CN114151874A (en) | 2021-10-28 | 2021-10-28 | Multi-split low-temperature starting device and control method |
Country Status (1)
| Country | Link |
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| CN (1) | CN114151874A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050062352A (en) * | 2003-12-19 | 2005-06-23 | 삼성전자주식회사 | Air conditioner |
| CN1910411A (en) * | 2004-01-07 | 2007-02-07 | 新明和工业株式会社 | Ultralow temperature refrigerator, refrigerating system, and vacuum apparatus |
| JP2008037274A (en) * | 2006-08-07 | 2008-02-21 | Calsonic Kansei Corp | Air conditioner for vehicle |
| JP2015025578A (en) * | 2013-07-24 | 2015-02-05 | 三浦工業株式会社 | Heat pump |
| CN109974245A (en) * | 2019-04-11 | 2019-07-05 | 珠海格力电器股份有限公司 | Target exhaust temperature control method and air conditioner |
| CN110360710A (en) * | 2019-06-14 | 2019-10-22 | 青岛海尔空调电子有限公司 | Multi-online air-conditioning system and its control method |
| CN110360709A (en) * | 2019-06-14 | 2019-10-22 | 青岛海尔空调电子有限公司 | Multi-online air-conditioning system and its control method |
| CN110388776A (en) * | 2019-08-01 | 2019-10-29 | 珠海格力电器股份有限公司 | Operation control method and equipment for low-temperature refrigerant heating equipment |
| CN110836553A (en) * | 2019-11-13 | 2020-02-25 | 广东美的暖通设备有限公司 | Control method of heat pump system |
| CN111947354A (en) * | 2020-09-02 | 2020-11-17 | 珠海格力电器股份有限公司 | Oil separator, control method thereof and air conditioning unit |
| CN112815572A (en) * | 2021-01-18 | 2021-05-18 | 中科广能能源研究院(重庆)有限公司 | Gas heat pump air conditioning system and rapid heating and liquid-proof compression control method |
| CN216346734U (en) * | 2021-10-28 | 2022-04-19 | 浙江中广电器集团股份有限公司 | Multi-split low-temperature starting device |
-
2021
- 2021-10-28 CN CN202111259181.6A patent/CN114151874A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050062352A (en) * | 2003-12-19 | 2005-06-23 | 삼성전자주식회사 | Air conditioner |
| CN1910411A (en) * | 2004-01-07 | 2007-02-07 | 新明和工业株式会社 | Ultralow temperature refrigerator, refrigerating system, and vacuum apparatus |
| JP2008037274A (en) * | 2006-08-07 | 2008-02-21 | Calsonic Kansei Corp | Air conditioner for vehicle |
| JP2015025578A (en) * | 2013-07-24 | 2015-02-05 | 三浦工業株式会社 | Heat pump |
| CN109974245A (en) * | 2019-04-11 | 2019-07-05 | 珠海格力电器股份有限公司 | Target exhaust temperature control method and air conditioner |
| CN110360710A (en) * | 2019-06-14 | 2019-10-22 | 青岛海尔空调电子有限公司 | Multi-online air-conditioning system and its control method |
| CN110360709A (en) * | 2019-06-14 | 2019-10-22 | 青岛海尔空调电子有限公司 | Multi-online air-conditioning system and its control method |
| CN110388776A (en) * | 2019-08-01 | 2019-10-29 | 珠海格力电器股份有限公司 | Operation control method and equipment for low-temperature refrigerant heating equipment |
| CN110836553A (en) * | 2019-11-13 | 2020-02-25 | 广东美的暖通设备有限公司 | Control method of heat pump system |
| CN111947354A (en) * | 2020-09-02 | 2020-11-17 | 珠海格力电器股份有限公司 | Oil separator, control method thereof and air conditioning unit |
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| CN216346734U (en) * | 2021-10-28 | 2022-04-19 | 浙江中广电器集团股份有限公司 | Multi-split low-temperature starting device |
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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. |