CN100376854C - Unit for calculating refrigerant suction pressure of compressor in refrigeration cycle - Google Patents
Unit for calculating refrigerant suction pressure of compressor in refrigeration cycle Download PDFInfo
- Publication number
- CN100376854C CN100376854C CNB2004100495710A CN200410049571A CN100376854C CN 100376854 C CN100376854 C CN 100376854C CN B2004100495710 A CNB2004100495710 A CN B2004100495710A CN 200410049571 A CN200410049571 A CN 200410049571A CN 100376854 C CN100376854 C CN 100376854C
- Authority
- CN
- China
- Prior art keywords
- compressor
- refrigerant
- cold
- producing medium
- admission pressure
- 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
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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
- 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
- F25B2500/00—Problems to be solved
- F25B2500/19—Calculation of parameters
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
-
- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/027—Compressor control by controlling pressure
- F25B2600/0272—Compressor control by controlling pressure the suction pressure
-
- 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
- F25B2700/13—Mass flow of refrigerants
-
- 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
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21171—Temperatures of an evaporator of the fluid cooled by the evaporator
- F25B2700/21173—Temperatures of an evaporator of the fluid cooled by the evaporator at the outlet
-
- 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
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21174—Temperatures of an evaporator of the refrigerant at the inlet of the evaporator
-
- 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
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21175—Temperatures of an evaporator of the refrigerant at the outlet of the evaporator
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
A unit for calculating a refrigerant suction pressure of a compressor in a refrigeration cycle having refrigerant compressor (2), condenser (3), pressure reducing mechanism (5) and evaporator (6), wherein a pressure of refrigerant sucked into the compressor (2) is estimated based on a detected evaporator exit air temperature which represents a refrigerant temperature in the evaporator (6), and a detected or estimated value of a refrigerant flow rate. The refrigerant suction pressure of the compressor (2) may be adequately estimated without providing a refrigerant suction pressure sensor.
Description
Technical field
The present invention relates to a kind of equipment that is used for calculating the compressor refrigerant admission pressure of kind of refrigeration cycle, specifically, what relate to is a kind of equipment that is used for suitably estimating being contained in the compressor refrigerant admission pressure of the kind of refrigeration cycle in the vehicle air conditioner.
Background technology
In the air-conditioning system of a use positive displacement compressor, when the pressure of the compressor air inlet cold-producing medium in the refrigerating circuit with compressor, condenser, the mechanism of decompressor and refrigerant evaporator is determined, just can estimate the pressure of air inlet cold-producing medium according to the control signal of discharge capacity, the exhaust capacity of described positive displacement compressor is controlled, make the actual pressure of air inlet cold-producing medium consistent with the setting value of cold-producing medium admission pressure, described setting value is imported as external signal (discharge capacity control signal).
But, in order to detect the cold-producing medium admission pressure of the air-conditioning system of not using this positive displacement compressor, a kind of cold-producing medium air inlet pressure sensor just must be provided, so also just increase cost, described positive displacement compressor is controlled the cold-producing medium admission pressure with external signal.
Therefore, a kind of equipment that calculates the compressor refrigerant admission pressure need be provided, this equipment can suitably estimate to be drawn into the refrigerant pressure in the compressor, and do not need to provide the cold-producing medium air inlet pressure sensor, even under the situation of not using the positive displacement compressor according to external signal control cold-producing medium admission pressure recited above, also be like this.
Summary of the invention
According to the present invention, the equipment that is used for calculating the compressor refrigerant admission pressure of kind of refrigeration cycle comprises compressor, condenser, the mechanism of decompressor and refrigerant evaporator, this equipment is characterised in that according to the refrigerant temperature value in the detected air themperature value in evaporator outlet place or detected evaporator surface temperature value or the detected evaporimeter and detection or the refrigerant flow value estimated, estimate to be drawn into the refrigerant pressure in the compressor, described detected air themperature value is just to have passed through the temperature of the air of evaporimeter.
In the present invention, estimate to be drawn into refrigerant pressure in the compressor according to following technical thought.That is to say, because the cold-producing medium in the evaporimeter is in gas and liquid two-phase state, so clearly determine the pressure of cold-producing medium according to the refrigerant temperature in the evaporimeter.Therefore can be by later air themperature of the evaporimeter of flowing through or the refrigerant temperature in evaporator surface temperature or the evaporimeter be detected the refrigerant pressure of estimating in the evaporimeter.In addition, in actual kind of refrigeration cycle, descend because of can cause refrigerant pressure in the pressure loss from the loop of evaporator to compressor.Because this pressure loss becomes greatly with the increase of refrigerant flow, so just can come the estimated pressure loss by the flow that detects cold-producing medium.Therefore, cold-producing medium admission pressure and the refrigerant temperature and the refrigerant flow in the evaporimeter of compressor are closely related, thereby by detecting or estimating this two numerical value, just can suitably estimate the cold-producing medium admission pressure.
According to the present invention, in a kind of like this equipment of the compressor refrigerant admission pressure that is used for calculating kind of refrigeration cycle, specifically estimate the cold-producing medium pressure of inspiration(Pi) with following equation:
Ps’＝a·Gr+b·Teva+c
Wherein Ps ' is the estimated value of cold-producing medium admission pressure,
Gr is a refrigerant flow,
Teva is the air themperature at evaporator outlet place, or evaporator surface temperature, also can be in the evaporimeter refrigerant temperature and
A, b, c are the constants that experiment is determined.
In addition; if the cold-producing medium admission pressure reduces too many; the amount of the cold-producing medium that sucks will reduce too much, then with cold-producing medium enter compressor recycle oil quantity just very little, thereby just might make because of lacking to lubricate and make compressor not be subjected to suitable protection.So, reduce too many phenomenon for fear of this cold-producing medium admission pressure, for example when the estimated value of cold-producing medium admission pressure is a preset value or littler numerical value, then the driving power of compressor will reduce (particularly under the positive displacement compressor situation of the gear change of no-clutch), and described in other words compressor can stop to drive (particularly having under the situation of compressor of clutch).
In addition, also can be with a kind of like this method, promptly when the estimated value of cold-producing medium admission pressure is a preset value A or littler numerical value, driving power to compressor is controlled, make the estimated value of cold-producing medium admission pressure become this preset value A, when the estimated value of cold-producing medium admission pressure is one during than the little preset value B of preset value A, just the driving power of compressor is controlled at minimum power (particularly under the positive displacement compressor situation of the gear change of no-clutch), or stops the driving (particularly having under the situation of compressor of clutch) of compressor.That is to say, two setting value A and B are provided, when can preventing the high frequent on/off, can protect compressor suitably.
This equipment that is used for calculating the compressor refrigerant admission pressure of kind of refrigeration cycle of the present invention is specially adapted to be installed in the kind of refrigeration cycle in the vehicle air conditioner.
In the equipment of the compressor refrigerant admission pressure that is used for calculating kind of refrigeration cycle of the present invention, can suitably estimate to be drawn into the refrigerant pressure in the compressor, and do not need to provide the cold-producing medium air inlet pressure sensor, therefore can reduce the cost of whole system.
In addition, even under the situation of not using the positive displacement compressor according to external signal control cold-producing medium admission pressure recited above, that is to say even without a kind of like this compressor, also can estimate to be drawn into a refrigerant pressure in the compressor, and can be with this equipment as universal computing device.
In addition, by estimating the cold-producing medium admission pressure, it is too many to avoid the cold-producing medium admission pressure to reduce, and can prevent to lack in the compressor lubricated situation about waiting thus suitably and take place.
Description of drawings
According to below in conjunction with the detailed description of accompanying drawing to the preferred embodiment of the present invention, will be more readily apparent from other features and advantages of the present invention, wherein,
Fig. 1 is the schematic diagram of equipment that is used for calculating the compressor refrigerant admission pressure of kind of refrigeration cycle according to an embodiment of the invention.
The specific embodiment
Vehicle air conditioner shown in Fig. 1 has the equipment of compressor refrigerant admission pressure that is used for calculating kind of refrigeration cycle according to the embodiment of the invention.Kind of refrigeration cycle 1 has a coolant compressor 2 that is for example driven by vehicle motor, and the driving force of engine is by an electromagnetic clutch transmission that is contained in the compressor 2.Cold-producing medium circulation in the cold-producing medium circulation of kind of refrigeration cycle 1.The high-temperature high-pressure refrigerant that is compressed by compressor 2 in condenser 3 by cooled off condensation and liquefaction with the outside air heat exchange.Utilize a gatherer drier 4 that the cold-producing medium of gas-liquid two-phase state is divided into gas phase and liquid phase, liquid refrigerant reduces pressure in an expansion mechanism (mechanism of decompressor) 5.The low pressure refrigerant inflow evaporator 6 that pressure reduces, the air of sending here with blower fan 10 carries out heat exchange.The cold-producing medium of evaporation is inhaled into compressor 2 in evaporimeter 6, is compressed once more.
Blower fan 10 is contained in the air duct 11, and the air that carries out air-conditioning in vehicle utilizes blower fan 10 to deliver to evaporimeter 6 from suction hole 12 inhaled airs by this pipeline.A part is passed through the heater 9 of the air of evaporimeter 6 by evaporimeter 6 downstream parts, is controlled by an air blender door 8 by the air capacity and the ratio between the bypass air amount of heater 9.In this embodiment, the air temperature sensor at evaporator outlet place 7 detects just the temperature T eva by the air of evaporimeter 6, and the temperature signal that has detected is input in the conditioning control unit 13.In this conditioning control unit 13, an equipment that is used for calculating the compressor refrigerant admission pressure of kind of refrigeration cycle of the present invention is installed.So this control module plays the effect that is used to calculate the equipment of cold-producing medium admission pressure of the present invention.Utilize each air door (not shown) to control opening/closing of each exhaust outlet 14,15 and 16, described exhaust outlet for example is the DEF exhaust outlet, VENT exhaust outlet, POOT exhaust outlet.
In this vehicle air conditioner with above-mentioned refrigerating circuit, calculate in the following method and the cold-producing medium admission pressure of estimating compressor 2.
At first, in order to estimate the cold-producing medium admission pressure, A and B below must determining.
A: the refrigerant temperature in the evaporimeter or one and the relevant physical quantity of refrigerant temperature in the evaporimeter;
B: refrigerant flow or a physical quantity relevant with refrigerant flow.
In order to detect above-mentioned A, any one in (a1) to (c1) below carrying out:
(a1) air temperature sensor with an evaporator outlet place detects;
(b1) detect with an evaporator surface temperature sensor;
(c1) with the refrigerant temperature in the temperature sensor detection evaporimeter.
In this embodiment, the evaporator air outlet temperature Teva that the air temperature sensor 7 at evaporator outlet place is detected is defined as above-mentioned numerical value A, that is to say, be defined as in the evaporimeter refrigerant temperature or with the relevant physical quantity of refrigerant temperature in the evaporimeter.
In order to detect above-mentioned B, any one in (a2) to (c2) below carrying out.That is to say, with an actual detected value or estimated value numerical value as the refrigerant flow of estimating the cold-producing medium admission pressure.
(a2) detect with flow sensor;
(b2) according to the aperture estimated flow of expansion mechanism 5 (swell value);
(c2) according to the discharge capacity control signal estimated flow of positive displacement compressor.
For example cold-producing medium admission pressure Ps is estimated and estimates numerical value Ps ' with following equation.
Ps’＝a·Gr+b·Teva+c
Wherein Ps ' is the estimated value of cold-producing medium admission pressure,
Gr is a refrigerant flow,
Teva is the temperature of air at evaporator outlet, or the evaporator surface temperature, also can be in the evaporimeter refrigerant temperature and
A, b, c are the constants that experiment is determined.
Therefore, evaporator outlet temperature according to the conduct physical quantity relevant with refrigerant temperature in the evaporimeter, estimate the refrigerant pressure in the evaporimeter, with a coefficient of refrigerant flow regard as with from the relevant physical quantity of the pressure loss of evaporator to compressor, in addition, increase a correction term (c) again, the cold-producing medium admission pressure of estimating compressor.
Do not need to provide the cold-producing medium air inlet pressure sensor,,, just can reduce the cost of whole system because this cold-producing medium air inlet pressure sensor is optional as long as just can estimate the cold-producing medium admission pressure by calculating.In addition, even the compressor that uses is not the positive displacement compressor of control cold-producing medium admission pressure, that is to say no matter used be the compressor of what form, can estimate the cold-producing medium admission pressure.In addition,, just can avoid the undue reduction of cold-producing medium admission pressure, also can avoid compressor to reduce the fault that occurs because of admission pressure is undue by suitably estimating the cold-producing medium admission pressure.
For example, if the cold-producing medium admission pressure descends too many, the amount of the cold-producing medium of suction will reduce too much, and then the oil mass that is inhaled in the compressor with cold-producing medium will reduce too much, thereby lack of lubrication will occur, compressor just can not be subjected to the effectively problem of protection.Yet,, will carry out following control according to the estimated value of above-mentioned cold-producing medium admission pressure in order to prevent the too many problem of this cold-producing medium admission pressure decline according to the present invention.That is to say, when the estimated value of cold-producing medium admission pressure is a preset value (for example 0.15Mpa) or littler numerical value, then carry out following control.
If compressor has clutch, then make compressor out of service by cutting off clutch.In addition, under the situation of the positive displacement compressor that does not have clutch, prevent that by reducing exhaust capacity the cold-producing medium admission pressure from descending too much.In addition, under the situation of the compressor of motor-driven no-clutch gear change, to prevent that the cold-producing medium admission pressure from descending too many by reducing rotating speed of motor.
In addition, by using two following setting values can suitably prevent defective recited above.That is to say, a setting value A ' (limiting value of cold-producing medium admission pressure is provided, this numerical value does not worry that compressor can make lack of lubrication because lacking oil return) and setting value the B ' (numerical value of cold-producing medium admission pressure, if less than this setting value, then this numerical value worries that compressor can make lack of lubrication because lacking oil return), and set them for A '＞B '.
When the estimated value of cold-producing medium admission pressure is A ' or more hour, just compressor is controlled, make the cold-producing medium admission pressure become A ' (solenoidoperated cluthes signal or discharge capacity control signal or motor speed signal).When the estimated value of cold-producing medium admission pressure is B ' or more hour, the control power of compressor is controlled to zero (clutch disconnects or discharge capacity is that zero (or minimum injection rate) or motor speed are zero).
So, by setting value A ' and B ' are provided, for example become setting value B ' or more hour when the estimated value of cold-producing medium admission pressure, can be immediately the driving power of compressor be controlled to zero, so that prevent that compressor is impaired.In addition, when the estimated value of cold-producing medium admission pressure becomes setting value A ' or more hour, by the cold-producing medium admission pressure being controlled to setting value A ', just can avoid occurring the cold-producing medium admission pressure and frequently become setting value B ' or the littler and situation high frequent on/off.
Claims (5)
1. equipment that is used for calculating the compressor refrigerant admission pressure of kind of refrigeration cycle, this kind of refrigeration cycle comprises refrigeration compressor, condenser, the mechanism of decompressor and evaporimeter, it is characterized in that according to the refrigerant temperature value in the detected air themperature value in evaporator outlet place or detected evaporator surface temperature value or the detected described evaporimeter and detection or the refrigerant flow value estimated, estimate to be drawn into the refrigerant pressure in the described compressor, described detected air themperature value is the temperature of the air by described evaporimeter just.
2. according to the equipment of compressor refrigerant admission pressure that is used for calculating kind of refrigeration cycle of claim 1, wherein estimate described cold-producing medium pressure of inspiration(Pi) with following equation:
Ps’＝a.Gr+b.Teva+c
Wherein Ps ' is the estimated value of cold-producing medium admission pressure,
Gr is a refrigerant flow,
Teva is the air themperature at evaporator outlet place, or evaporator surface temperature, also can be in the described evaporimeter refrigerant temperature and
A, b, c are the constants that experiment is determined.
3. according to the equipment of compressor refrigerant admission pressure that is used for calculating kind of refrigeration cycle of claim 1, wherein when the estimated value of cold-producing medium admission pressure is a preset value or littler numerical value, reduce the driving power of described compressor, or stop the driving of described compressor.
4. according to the equipment of compressor refrigerant admission pressure that is used for calculating kind of refrigeration cycle of claim 1, wherein when the estimated value of cold-producing medium admission pressure is a preset value A ' or littler numerical value, driving power to compressor is controlled, make the estimated value of cold-producing medium admission pressure become this preset value A ', and when the estimated value of cold-producing medium admission pressure is one during than the little preset value B ' of described preset value A ', just the driving power with compressor is controlled at minimum power, or stops the driving of compressor.
5. according to the equipment of compressor refrigerant admission pressure that is used for calculating kind of refrigeration cycle of claim 1, wherein said kind of refrigeration cycle is the kind of refrigeration cycle that is installed in the vehicle air conditioner.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP173063/2003 | 2003-06-18 | ||
| JP2003173063A JP2005009734A (en) | 2003-06-18 | 2003-06-18 | Compressor intake refrigerant pressure calculating device in refrigerating cycle |
| JP173063/03 | 2003-06-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1573260A CN1573260A (en) | 2005-02-02 |
| CN100376854C true CN100376854C (en) | 2008-03-26 |
Family
ID=33410947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100495710A Expired - Fee Related CN100376854C (en) | 2003-06-18 | 2004-06-17 | Unit for calculating refrigerant suction pressure of compressor in refrigeration cycle |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1489369A1 (en) |
| JP (1) | JP2005009734A (en) |
| CN (1) | CN100376854C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007198180A (en) * | 2006-01-24 | 2007-08-09 | Sanden Corp | Cold system |
| KR100748987B1 (en) | 2006-02-09 | 2007-08-13 | 엘지전자 주식회사 | Air-condition and the control method for the same |
| JP4453724B2 (en) | 2007-06-29 | 2010-04-21 | 株式会社デンソー | Refrigeration cycle equipment for vehicles |
| FR2926353B1 (en) * | 2008-01-15 | 2012-08-24 | Aldes Aeraulique | INSTALLATION OF PRODUCTION OF HOT SANITARY WATER. |
| FR2949387B1 (en) * | 2009-08-25 | 2011-11-18 | Peugeot Citroen Automobiles Sa | AIR CONDITIONING WITH POWER SUPPLY ESTIMATOR OF A COMPRESSOR |
| JP4902723B2 (en) * | 2009-11-12 | 2012-03-21 | 三菱電機株式会社 | Condensation pressure detection system and refrigeration cycle system |
| US8830079B2 (en) * | 2011-06-29 | 2014-09-09 | Ford Global Technologies, Llc | Low air conditioning refrigerant detection method |
| JP6005484B2 (en) * | 2012-11-09 | 2016-10-12 | サンデンホールディングス株式会社 | Air conditioner for vehicles |
| CN105466093B (en) * | 2015-11-17 | 2017-12-19 | 广东美的制冷设备有限公司 | The pressure at expulsion of compressor and the virtual detection method and device of back pressure |
| CN105841413B (en) * | 2016-03-29 | 2018-06-26 | 广东美的制冷设备有限公司 | Air-conditioner control method and device |
| CN107215174B (en) * | 2017-06-27 | 2019-05-21 | 安徽江淮汽车集团股份有限公司 | For detecting the detection method of air-conditioning thermic load and refrigerant flow |
| US20230384012A1 (en) * | 2022-05-27 | 2023-11-30 | Emerson Climate Technologies, Inc. | Systems and methods for determining startup pressure ratio for dynamic compressors |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2378666Y (en) * | 1999-06-17 | 2000-05-17 | 清华同方股份有限公司 | Suction and discharge pressure detection device for one-driving-multiple air conditioner compressor |
| EP1139042A2 (en) * | 2000-03-27 | 2001-10-04 | MEYER, Friedhelm | Control device for a refrigeration installation as well as control method |
| CN1339088A (en) * | 1999-12-06 | 2002-03-06 | 大金工业株式会社 | Scroll type compressor |
| US20020139128A1 (en) * | 2001-04-03 | 2002-10-03 | Takahisa Suzuki | Vapor compression type refrigeration apparatus including leak detection and method for detecting refrigerant leaks |
| US20030051495A1 (en) * | 2001-09-17 | 2003-03-20 | Hiromi Ohta | Vehicle air conditioning system |
| US20030089121A1 (en) * | 2000-06-13 | 2003-05-15 | Wilson James J. | Method and apparatus for variable frequency controlled compressor and fan |
-
2003
- 2003-06-18 JP JP2003173063A patent/JP2005009734A/en active Pending
-
2004
- 2004-06-07 EP EP04253375A patent/EP1489369A1/en not_active Withdrawn
- 2004-06-17 CN CNB2004100495710A patent/CN100376854C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2378666Y (en) * | 1999-06-17 | 2000-05-17 | 清华同方股份有限公司 | Suction and discharge pressure detection device for one-driving-multiple air conditioner compressor |
| CN1339088A (en) * | 1999-12-06 | 2002-03-06 | 大金工业株式会社 | Scroll type compressor |
| EP1139042A2 (en) * | 2000-03-27 | 2001-10-04 | MEYER, Friedhelm | Control device for a refrigeration installation as well as control method |
| US20030089121A1 (en) * | 2000-06-13 | 2003-05-15 | Wilson James J. | Method and apparatus for variable frequency controlled compressor and fan |
| US20020139128A1 (en) * | 2001-04-03 | 2002-10-03 | Takahisa Suzuki | Vapor compression type refrigeration apparatus including leak detection and method for detecting refrigerant leaks |
| US20030051495A1 (en) * | 2001-09-17 | 2003-03-20 | Hiromi Ohta | Vehicle air conditioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005009734A (en) | 2005-01-13 |
| CN1573260A (en) | 2005-02-02 |
| EP1489369A1 (en) | 2004-12-22 |
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