US20120177514A1 - Discharge pressure estimation for compressor - Google Patents
Discharge pressure estimation for compressor Download PDFInfo
- Publication number
- US20120177514A1 US20120177514A1 US13/004,911 US201113004911A US2012177514A1 US 20120177514 A1 US20120177514 A1 US 20120177514A1 US 201113004911 A US201113004911 A US 201113004911A US 2012177514 A1 US2012177514 A1 US 2012177514A1
- Authority
- US
- United States
- Prior art keywords
- compressor
- discharge pressure
- controller
- current
- discharge
- 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.)
- Abandoned
Links
Images
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/07—Electric current
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/18—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/60—Prime mover parameters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/0085—Prime movers
-
- 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
-
- 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
- F25B2700/15—Power, e.g. by voltage or current
- F25B2700/151—Power, e.g. by voltage or current of the compressor motor
-
- 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
- F25B2700/21156—Temperatures of a compressor or the drive means therefor of the motor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
A compressor has a controller which is provided with current information for a current passing into a motor associated with the compressor. The compressor includes a compressor pump unit driven by the motor, and a discharge line. The controller is programmed to utilize the current information to predict a discharge pressure at the discharge of the compressor.
Description
- This application relates to the use of motor current in a compressor to estimate a discharge pressure.
- Compressors are an integral part of any refrigerant system. Modern compressors are provided with a large number of increasingly complex controls which take in data from any number of locations within an associated refrigerant system, and then develop ways to control the compressor most efficiently. One piece of data that is required is the discharge pressure of the compressor. Thus, a discharge pressure sensor is typically incorporated into modern systems.
- Another competing factor in modern compressors is to lower cost. Each added component requires additional cost, and thus the elimination of a component would be desirable.
- A compressor has a controller which is provided with current information for a current passing into a motor associated with the compressor. The compressor includes a compressor pump unit driven by the motor, and a discharge line. The controller is programmed to utilize the current information to predict a discharge pressure at the discharge of the compressor.
- These and other features of the present invention can be best understood from the following specification and drawings, the following of which is a brief description.
-
FIG. 1 schematically shows a refrigerant system. -
FIG. 2 is a graph of current versus discharge. -
FIG. 3 is a brief flow chart of this invention. -
FIG. 1 shows arefrigerant system 20 incorporating acompressor 22 provided with anelectric controller 32.Power 34 passes through the controller to thecompressor 22 to drive amotor 51, which drives acompressor pump unit 50. Thecompressor pump unit 50 may be a scroll compressor, or may be any other type of compressor. - A
suction line 152 leads into a sealed compressor chamber, and to thecompressor pump unit 50. The suction pressure refrigerant is compressed and then delivered to adischarge line 52. As mentioned above, it is desirable to know the pressure at thedischarge 52. - Suction pressure is also an important variable which is typically utilized in modern compressor controls. A
suction pressure sensor 23 is shown schematically on thesuction line 152. This sensor could be at any number of other locations, and the entire structure of thecompressor 22 is shown schematically. Downstream of thecompressor 22 is acondenser 24. Downstream of thecondenser 24 is anexpansion device 28, and then anevaporator 30. Refrigerant passes from thecompressor 22, through thecondenser 24, theexpansion device 28, theevaporator 30, and then back to through thesuction line 152 to thecompressor 22. - The
controller 32 takes measurements from an inverter of at least current passing to themotor 51. In addition, thecontroller 32 may receive information from thesuction pressure sensor 23. Many compressor motors are fixed speed, and thus thecontroller 32 will know the speed. If themotor 51 can operate at several speeds, that information will also be sent to controller 32. - A
temperature sensor 26 may be associated with thecondenser 24. The temperature sensor could be on a condenser return bend, or if the condenser is a microchannel heat exchanger, in the return header. -
FIG. 2 shows a relationship between current heading to themotor 51 and the discharge pressure. The varying curves would represent a change in discharge pressure with a change in current at different speeds. - The curves are shown as examples only, and the actual current versus discharge pressure curves would be developed for each
compressor 22 which would utilize this invention. However, it is known that there is a relationship between discharge pressure and current. - Further, one may fine-tune this determination by adding suction pressure to provide more accurate estimates of the discharge pressure. Further, a temperature at the
motor 51 can also be sent to thecontroller 32, and provide further fine-control over the estimate. - However, for purposes of the broadest aspects of this invention, all that would be necessary is to know current, and then to estimate discharge pressure. In this manner, the discharge pressure can be utilized by the
controller 32 to control operation of the motor and compressor for any number of other applications. - At the same time, and as shown in
FIG. 3 , while thecontroller 32 is estimating the pressure PDC or the discharge pressure based on current, the controller is also estimating a discharge pressure PDT, or one based upon the temperature information from thecondenser temperature sensor 26. These can be compared. If the two estimated pressures are off by more than a predetermined amount, then a determination can be made that the system may be low on charge, or there could be something mechanically wrong with the compressor. Thus, as shown, some diagnostic warning can come from this comparison. - Although an embodiment of this invention has been disclosed, a worker of ordinary skill in this art would recognize that certain modifications would come within the scope of this invention. For that reason, the following claims should be studied to determine the true scope and content of this invention.
Claims (5)
1. A compressor comprising:
a controller provided with current information for a current passing into a motor associated with said compressor, said compressor including a compressor pump unit driven by said motor, and a discharge line; and
said controller being programmed to utilize said current information to predict a discharge pressure at the discharge of the compressor.
2. The compressor as set forth in claim 1 , wherein a suction pressure sensor provides suction pressure information to said controller.
3. The compressor as set forth in claim 2 , wherein a temperature at the motor is utilized to fine-tune the discharge pressure estimate.
4. The compressor as set forth in claim 1 , wherein said controller also takes in information from a location remote from said compressor and utilizes said information to calculate an alternative discharge pressure estimate, and said alternative discharge pressure estimate being compared to said discharge pressure estimate based upon current, and an indication of a potential problem being made should said two pressures differ by more than a predetermined amount.
5. The compressor as set forth in claim 1 , wherein the controller is provided with curves correlating current with discharge pressure and these are utilized to calculate the discharge pressure.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/004,911 US20120177514A1 (en) | 2011-01-12 | 2011-01-12 | Discharge pressure estimation for compressor |
DE102011119933A DE102011119933A1 (en) | 2011-01-12 | 2011-12-01 | Compression pressure estimation for compressor |
CN201210006764.2A CN102588288B (en) | 2011-01-12 | 2012-01-11 | For the exhaust pressure estimation of compressor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/004,911 US20120177514A1 (en) | 2011-01-12 | 2011-01-12 | Discharge pressure estimation for compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120177514A1 true US20120177514A1 (en) | 2012-07-12 |
Family
ID=46455389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/004,911 Abandoned US20120177514A1 (en) | 2011-01-12 | 2011-01-12 | Discharge pressure estimation for compressor |
Country Status (3)
Country | Link |
---|---|
US (1) | US20120177514A1 (en) |
CN (1) | CN102588288B (en) |
DE (1) | DE102011119933A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017131087A (en) * | 2016-01-22 | 2017-07-27 | サンデン・オートモーティブコンポーネント株式会社 | Current sensor abnormality detection device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015214006A1 (en) * | 2015-07-24 | 2017-01-26 | Continental Reifen Deutschland Gmbh | Method for pressure measurement |
CN114992925A (en) * | 2021-03-02 | 2022-09-02 | 广东美的暖通设备有限公司 | Control method, device and equipment of compressor, storage medium and refrigeration system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6607367B1 (en) * | 1999-12-06 | 2003-08-19 | Daikin Industries, Ltd. | Scroll type compressor |
US20050051119A1 (en) * | 2002-05-14 | 2005-03-10 | Caterpillar Inc. | Engine valve actuation system and method |
US20070012052A1 (en) * | 2005-02-23 | 2007-01-18 | Emerson Electric Co. | Interactive control system for an HVAC system |
US20090041598A1 (en) * | 2006-01-25 | 2009-02-12 | Sanden Corporation | Electric compressor |
US20120156057A1 (en) * | 2010-12-17 | 2012-06-21 | Aisan Kogyo Kabushiki Kaisha | Fuel supply apparatus |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3995377B2 (en) * | 1999-12-27 | 2007-10-24 | 株式会社東芝 | Control apparatus and method for refrigeration cycle |
BRPI0105524B1 (en) * | 2000-11-29 | 2015-08-18 | Lg Electronics Inc | Linear Compressor Control Apparatus and Method |
JP4686242B2 (en) * | 2005-04-12 | 2011-05-25 | サンデン株式会社 | Control method and control apparatus for electric compressor |
JP4861900B2 (en) * | 2007-02-09 | 2012-01-25 | サンデン株式会社 | Capacity control system for variable capacity compressor |
-
2011
- 2011-01-12 US US13/004,911 patent/US20120177514A1/en not_active Abandoned
- 2011-12-01 DE DE102011119933A patent/DE102011119933A1/en not_active Withdrawn
-
2012
- 2012-01-11 CN CN201210006764.2A patent/CN102588288B/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6607367B1 (en) * | 1999-12-06 | 2003-08-19 | Daikin Industries, Ltd. | Scroll type compressor |
US20050051119A1 (en) * | 2002-05-14 | 2005-03-10 | Caterpillar Inc. | Engine valve actuation system and method |
US20070012052A1 (en) * | 2005-02-23 | 2007-01-18 | Emerson Electric Co. | Interactive control system for an HVAC system |
US20090041598A1 (en) * | 2006-01-25 | 2009-02-12 | Sanden Corporation | Electric compressor |
US20120156057A1 (en) * | 2010-12-17 | 2012-06-21 | Aisan Kogyo Kabushiki Kaisha | Fuel supply apparatus |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017131087A (en) * | 2016-01-22 | 2017-07-27 | サンデン・オートモーティブコンポーネント株式会社 | Current sensor abnormality detection device |
US20200186011A1 (en) * | 2016-01-22 | 2020-06-11 | Sanden Automotive Components Corporation | Abnormality detecting device for current sensor |
Also Published As
Publication number | Publication date |
---|---|
CN102588288A (en) | 2012-07-18 |
DE102011119933A1 (en) | 2012-07-12 |
CN102588288B (en) | 2016-05-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DANFOSS SCROLL TECHNOLOGIES LLC, ARKANSAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HAHN, GREGORY W.;REEL/FRAME:025623/0066 Effective date: 20110111 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION |