US20050011207A1 - Control of air conditioning system with limited number of discrete inputs - Google Patents
Control of air conditioning system with limited number of discrete inputs Download PDFInfo
- Publication number
- US20050011207A1 US20050011207A1 US10/619,714 US61971403A US2005011207A1 US 20050011207 A1 US20050011207 A1 US 20050011207A1 US 61971403 A US61971403 A US 61971403A US 2005011207 A1 US2005011207 A1 US 2005011207A1
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- United States
- Prior art keywords
- stages
- inputs
- input
- control
- binary
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- 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.)
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Classifications
-
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
Definitions
- HVAC & R heating, ventilation, air conditioning and refrigeration
- HVAC & R systems have, and can read, only two discrete inputs which signify the desired amount of cooling needed or desired in a particular space.
- third party controls and thermostats typically only have two outputs for use in issuing such inputs to the air conditioning system.
- the conventional system must decide as to how it is to be operated.
- Such systems can frequently have three or more stages or vapor compression circuits, and when the number of stages exceeds the number of inputs, the flexibility of operation of the device is limited.
- a method for interpreting input on an X input multi-stage HVAC & R system to control Y stages of the system, wherein Y is greater than X.
- This method comprises the steps of receiving input from X inputs; translating said input into a binary system having Y binary outputs; and controlling said system based upon said binary outputs.
- an HVAC & R system which comprises a multi-stage system having X inputs; and Y stages, and wherein Y is greater than X; and a processor adapted to receive said X inputs, translate said X inputs into a binary system, and use said binary system to control said Y stages.
- FIG. 1 schematically illustrates a system and method in accordance with the present invention.
- HVAC &R heating, ventilation, air conditioning and refrigeration
- FIG. 1 shows a system 10 including a multi-stage cooling system 12 and a thermostat 14 which is used to control operation of multi-stage system 12 .
- System 12 includes a plurality of stages 16 , 18 , 20 , in this case three stages, each including a compressor and typical components of a vapor compression circuit for providing the desired cooling function.
- System 12 further includes a microprocessor 22 which is communicated with stages 16 , 18 , 20 , and also with thermostat 14 .
- Microprocessor 22 advantageously serves to receive input from thermostat 14 and use this input to control stages 16 , 18 , 20 as will be further discussed below.
- thermostat 14 is frequently a device with a limited number of outputs, in this case labeled as y1 and y2.
- conventional systems typically have a limited number of inputs for receiving such input and microprocessor 22 in this invention is shown having a like number of inputs as the output of thermostat 14 .
- inputs 24 of microprocessor 22 are adapted to receive output from thermostat 14 , and to translate this input into a greater number of outputs which can be used to more flexibly control the different stages of system 12 as desired.
- the inputs y1, y2 are translated or converted into a binary system which can then be used to signify a relatively greater number of different commands that can be conveyed to the different stages of system 10 .
- Table one shows one configuration of a conventional control system wherein the microprocessor typically turns on the first stage of cooling when the y1 input is on, and turns on all stages of the system when the y2 input is on.
- the y1, y2 inputs can be used to control the system with only one or three stages active.
- the y1 input can be configured to turn on two stages, while the y2 input turns on all stages. This provides for operation with two or three stages of the system active.
- the inputs are translated into a binary control system such as that illustrated in Table 3 above whereby the combination of different inputs has significance as well as the quantity of the input, so that the 2 signal input can be translated into 4 different commands.
- a binary control system such as that illustrated in Table 3 above whereby the combination of different inputs has significance as well as the quantity of the input, so that the 2 signal input can be translated into 4 different commands.
- system and method of the present invention can advantageously be adapted to systems having a greater number of inputs and still further greater number of stages.
- a system having 3 inputs can be provided in accordance with the invention whereby the 3 inputs are translated into 8 different distinct commands of a binary control system so that 8 stages of cooling can be provided.
- a 4-input system can handle sixteen different stages.
- system and method in accordance with the present invention advantageously provide for operation of a system having X inputs so as to independently control Y stages of the system, wherein Y is greater than X, so as to provide enhanced flexibility of operation of the system without substantial complication of same.
- Microprocessor 22 can advantageously be any type of processor unit advantageously adapted to be incorporated into an HVAC & R system, or can alternatively be provided as external hardware, or as a separate device communicated through various electronic communication means.
- thermostat 14 can be any type of air conditioning or building control system, smart thermostat, and the like.
- system and method of the present invention can be incorporated into existing systems and/or incorporated into new systems, as the system and method of the present invention readily provide for incorporation or retrofit into existing systems.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A method for interpreting input on a X input multi-stage HVAC & R system to control Y stages of the system wherein Y is greater than X, including the steps of receiving input from X inputs; translating the input into a binary system having Y binary outputs; and controlling the system based upon the binary outputs.
Description
- The invention relates to heating, ventilation, air conditioning and refrigeration (HVAC & R) systems and, more particularly to a system and method for operating a system which has a limited number of control inputs.
- Conventional systems may frequently have only a discrete number of inputs which can be utilized to signify control actions of the device. For example, certain HVAC & R systems have, and can read, only two discrete inputs which signify the desired amount of cooling needed or desired in a particular space. Further, third party controls and thermostats typically only have two outputs for use in issuing such inputs to the air conditioning system. Thus, with two inputs, the conventional system must decide as to how it is to be operated.
- Such systems can frequently have three or more stages or vapor compression circuits, and when the number of stages exceeds the number of inputs, the flexibility of operation of the device is limited.
- The need exists for an improved method for operating such a system, to provide suitable control for all possible states of operation for same.
- It is therefore the primary object of the present invention to provide such a system.
- It is a further object of the present invention to provide a method for operating a multi-stage having limited numbers of inputs so as to provide expanded ranges of operation of same.
- Other objects and advantages of the present invention will appear hereinbelow.
- In accordance with the present invention, the foregoing objects and advantages have been readily attained.
- According to the invention, a method is provided for interpreting input on an X input multi-stage HVAC & R system to control Y stages of the system, wherein Y is greater than X. This method comprises the steps of receiving input from X inputs; translating said input into a binary system having Y binary outputs; and controlling said system based upon said binary outputs.
- In further accordance with the invention, an HVAC & R system is provided which comprises a multi-stage system having X inputs; and Y stages, and wherein Y is greater than X; and a processor adapted to receive said X inputs, translate said X inputs into a binary system, and use said binary system to control said Y stages.
- A detailed description of preferred embodiments of the present invention follows, with reference to the attached
FIG. 1 , which schematically illustrates a system and method in accordance with the present invention. - The invention relates to heating, ventilation, air conditioning and refrigeration (HVAC &R) systems and, more particularly, to such systems and a method for operating such systems whereby limited number of control inputs can be used to independently control a greater number of stages of the system.
-
FIG. 1 shows asystem 10 including amulti-stage cooling system 12 and athermostat 14 which is used to control operation ofmulti-stage system 12. -
System 12 includes a plurality ofstages System 12 further includes amicroprocessor 22 which is communicated withstages thermostat 14.Microprocessor 22 advantageously serves to receive input fromthermostat 14 and use this input tocontrol stages - As identified above,
thermostat 14 is frequently a device with a limited number of outputs, in this case labeled as y1 and y2. Further, conventional systems typically have a limited number of inputs for receiving such input andmicroprocessor 22 in this invention is shown having a like number of inputs as the output ofthermostat 14. Thus,inputs 24 ofmicroprocessor 22 are adapted to receive output fromthermostat 14, and to translate this input into a greater number of outputs which can be used to more flexibly control the different stages ofsystem 12 as desired. - In accordance with the invention, the inputs y1, y2 are translated or converted into a binary system which can then be used to signify a relatively greater number of different commands that can be conveyed to the different stages of
system 10. - This is more clearly illustrated in Tables 1, 2 and 3 set forth below.
TABLE 1 Standard control system (Option 1) Y1 Y2 # of stages 0 0 0 1 0 1 0 1 3 1 1 3 -
TABLE 2 Standard control system (Option 2) Y1 Y2 # of stages 0 0 0 1 0 2 0 1 3 1 1 3 -
TABLE 3 Binary control system # of stages turned Y1 Y2 on by the microprocessor 0 0 0 1 0 1 0 1 2 1 1 3 - Table one shows one configuration of a conventional control system wherein the microprocessor typically turns on the first stage of cooling when the y1 input is on, and turns on all stages of the system when the y2 input is on. Thus, in such system, the y1, y2 inputs can be used to control the system with only one or three stages active.
- In a reverse of the configuration of Table 1, the y1 input can be configured to turn on two stages, while the y2 input turns on all stages. This provides for operation with two or three stages of the system active.
- It should be readily apparent, however, that the configurations of Tables 1 and 2 do not allow for operation of the system with each of 0, 1, 2 and 3 stages active.
- In accordance with the invention, the inputs are translated into a binary control system such as that illustrated in Table 3 above whereby the combination of different inputs has significance as well as the quantity of the input, so that the 2 signal input can be translated into 4 different commands. This advantageously allows for a 2 input system to operate with 4 of stages in operation as illustrated in Table 3, and is particularly advantageous as compared to conventional control systems.
- It should be readily appreciated that the system and method of the present invention can advantageously be adapted to systems having a greater number of inputs and still further greater number of stages. For example, a system having 3 inputs can be provided in accordance with the invention whereby the 3 inputs are translated into 8 different distinct commands of a binary control system so that 8 stages of cooling can be provided. Similarly, a 4-input system can handle sixteen different stages.
- This can further be advantageously be incorporated into systems which have both cooling and heating capacity and stages, and preferably which have multiple stages of each. Under such circumstances, a limited number of inputs can be utilized to control multiple stages of cooling, multiple stages of heating, and combinations thereof.
- In such a system, for example a system having 4 inputs and 3 stages each of heating and cooling, conventional systems cannot be used to provide completely flexible operation of each of different stages. In accordance with the present invention, however, and as illustrated in Table 4 below, the input from
stages 1 and 2, along with a third input indicating cooling or no cooling, can be used to provide flexible operation of each and all stages of the system, while leaving the fourth input advantageously available for use for a different piece of information.TABLE 4 Stage Input Stage Input # of Cool # of Heating #2 #1 Cooling? Stages Stages 0 0 0 0 0 0 1 0 0 1 1 0 0 0 2 1 1 0 0 3 0 0 1 0 0 0 1 1 1 0 1 0 1 2 0 1 1 1 3 0 - Thus it should readily be appreciated that the system and method in accordance with the present invention advantageously provide for operation of a system having X inputs so as to independently control Y stages of the system, wherein Y is greater than X, so as to provide enhanced flexibility of operation of the system without substantial complication of same.
-
Microprocessor 22 can advantageously be any type of processor unit advantageously adapted to be incorporated into an HVAC & R system, or can alternatively be provided as external hardware, or as a separate device communicated through various electronic communication means. - Furthermore,
thermostat 14 can be any type of air conditioning or building control system, smart thermostat, and the like. - Still further, it should be appreciated that the system and method of the present invention can be incorporated into existing systems and/or incorporated into new systems, as the system and method of the present invention readily provide for incorporation or retrofit into existing systems.
- It is to be understood that the invention is not limited to the illustrations described and shown herein, which are deemed to be merely illustrative of the best modes of carrying out the invention, and which are susceptible of modification of form, size, arrangement of parts and details of operation. The invention rather is intended to encompass all such modifications which are within its spirit and scope as defined by the claims.
Claims (11)
1. A method for interpreting input on a X input multi-stage HVAC & R system to control Y stages of said system, wherein Y is greater than X, comprising the steps of:
receiving input from X inputs;
translating said input into a binary system having Y binary outputs; and
controlling said system based upon said binary outputs.
2. The method of claim 1 , wherein said system has 2 inputs and 3 stages, and wherein said binary outputs allow said system to be operated with each of 0, 1, 2 and 3 of said stages active.
3. The method of claim 1 , wherein said stages are vapor compression circuits.
4. The method of claim 1 , wherein said stages are adapted to provide at lest one of heating, cooling and combinations thereof.
5. The method of claim 1 , wherein said stages include both heating and cooling stages.
6. An HVAC & R system, comprising:
a multi-stage system having X inputs; and Y stages, and wherein Y is greater than X; and
a processor adapted to receive said X inputs, translate said X inputs into a binary system, and use said binary system to control said Y stages.
7. The system of claim 6 , wherein said system has 2 inputs and 3 stages, and wherein said binary outputs allow said system to be operated with each of 0, 1, 2 and 3 of said stages active.
8. The system of claim 6 , wherein said stages are vapor compression circuits.
9. The system of claim 6 , wherein said stages are adapted to provide at lest one of heating, cooling and combinations thereof.
10. The system of claim 6 , wherein said stages include both heating and cooling stages.
11. The system of claim 6 , further comprising an input member communicated with said system for providing said X input to said processor.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/619,714 US20050011207A1 (en) | 2003-07-14 | 2003-07-14 | Control of air conditioning system with limited number of discrete inputs |
EP04777908A EP1651910A1 (en) | 2003-07-14 | 2004-07-12 | Control apparatus and method of multistage air conditioning system |
PCT/US2004/022117 WO2005008142A1 (en) | 2003-07-14 | 2004-07-12 | Control apparatus and method of multistage air conditioning system |
JP2006520240A JP2007524061A (en) | 2003-07-14 | 2004-07-12 | Control device and control method for multistage air conditioning system |
CNA2004800203744A CN1823246A (en) | 2003-07-14 | 2004-07-12 | Control device and method of multilevel air-conditioning system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/619,714 US20050011207A1 (en) | 2003-07-14 | 2003-07-14 | Control of air conditioning system with limited number of discrete inputs |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050011207A1 true US20050011207A1 (en) | 2005-01-20 |
Family
ID=34062621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/619,714 Abandoned US20050011207A1 (en) | 2003-07-14 | 2003-07-14 | Control of air conditioning system with limited number of discrete inputs |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050011207A1 (en) |
EP (1) | EP1651910A1 (en) |
JP (1) | JP2007524061A (en) |
CN (1) | CN1823246A (en) |
WO (1) | WO2005008142A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060280627A1 (en) * | 2005-05-24 | 2006-12-14 | Nagaraj Jayanth | Control and protection system for a variable capacity compressor |
US9427431B2 (en) | 1998-04-09 | 2016-08-30 | Johns Hopkins University School Of Medicine | Inhibitors of hedgehog signaling pathways, compositions and uses related thereto |
US9440988B2 (en) | 1998-04-09 | 2016-09-13 | John Hopkins University School Of Medicine | Regulators of the hedgehog pathway, compositions and uses related thereto |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3797560A (en) * | 1972-06-21 | 1974-03-19 | I Zaharoni | Control system for environmental conditioning units |
US4347712A (en) * | 1980-11-03 | 1982-09-07 | Honeywell Inc. | Microprocessor discharge temperature air controller for multi-stage heating and/or cooling apparatus and outdoor air usage controller |
US4379483A (en) * | 1981-08-17 | 1983-04-12 | The Coleman Company, Inc. | Method of controlling heating and cooling sources |
US4384462A (en) * | 1980-11-20 | 1983-05-24 | Friedrich Air Conditioning & Refrigeration Co. | Multiple compressor refrigeration system and controller thereof |
US4530395A (en) * | 1982-10-14 | 1985-07-23 | Parker Electronics, Inc. | Single zone HVAC controlled for operation in multiple zone arrangement |
US4535602A (en) * | 1983-10-12 | 1985-08-20 | Richard H. Alsenz | Shift logic control apparatus for unequal capacity compressors in a refrigeration system |
US4819714A (en) * | 1986-09-22 | 1989-04-11 | Mitsubishi Denki Kabushiki Kaisha | Air conditioning apparatus |
US5039009A (en) * | 1990-07-16 | 1991-08-13 | American Standard Inc. | Thermostat interface for a refrigeration system controller |
US6540148B1 (en) * | 2001-07-27 | 2003-04-01 | Johnson Controls Technology Company | Method and apparatus for sequencing multistage systems of known relative capacities |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5316073A (en) * | 1993-04-02 | 1994-05-31 | Johnson Service Company | Twinning control |
WO1997049957A1 (en) * | 1996-06-24 | 1997-12-31 | Johnson Service Company | Zoning interface system for a variable speed heat pump |
-
2003
- 2003-07-14 US US10/619,714 patent/US20050011207A1/en not_active Abandoned
-
2004
- 2004-07-12 EP EP04777908A patent/EP1651910A1/en not_active Withdrawn
- 2004-07-12 WO PCT/US2004/022117 patent/WO2005008142A1/en active Application Filing
- 2004-07-12 JP JP2006520240A patent/JP2007524061A/en not_active Withdrawn
- 2004-07-12 CN CNA2004800203744A patent/CN1823246A/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3797560A (en) * | 1972-06-21 | 1974-03-19 | I Zaharoni | Control system for environmental conditioning units |
US4347712A (en) * | 1980-11-03 | 1982-09-07 | Honeywell Inc. | Microprocessor discharge temperature air controller for multi-stage heating and/or cooling apparatus and outdoor air usage controller |
US4384462A (en) * | 1980-11-20 | 1983-05-24 | Friedrich Air Conditioning & Refrigeration Co. | Multiple compressor refrigeration system and controller thereof |
US4379483A (en) * | 1981-08-17 | 1983-04-12 | The Coleman Company, Inc. | Method of controlling heating and cooling sources |
US4530395A (en) * | 1982-10-14 | 1985-07-23 | Parker Electronics, Inc. | Single zone HVAC controlled for operation in multiple zone arrangement |
US4535602A (en) * | 1983-10-12 | 1985-08-20 | Richard H. Alsenz | Shift logic control apparatus for unequal capacity compressors in a refrigeration system |
US4819714A (en) * | 1986-09-22 | 1989-04-11 | Mitsubishi Denki Kabushiki Kaisha | Air conditioning apparatus |
US5039009A (en) * | 1990-07-16 | 1991-08-13 | American Standard Inc. | Thermostat interface for a refrigeration system controller |
US6540148B1 (en) * | 2001-07-27 | 2003-04-01 | Johnson Controls Technology Company | Method and apparatus for sequencing multistage systems of known relative capacities |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9427431B2 (en) | 1998-04-09 | 2016-08-30 | Johns Hopkins University School Of Medicine | Inhibitors of hedgehog signaling pathways, compositions and uses related thereto |
US9440988B2 (en) | 1998-04-09 | 2016-09-13 | John Hopkins University School Of Medicine | Regulators of the hedgehog pathway, compositions and uses related thereto |
US20060280627A1 (en) * | 2005-05-24 | 2006-12-14 | Nagaraj Jayanth | Control and protection system for a variable capacity compressor |
US8156751B2 (en) | 2005-05-24 | 2012-04-17 | Emerson Climate Technologies, Inc. | Control and protection system for a variable capacity compressor |
Also Published As
Publication number | Publication date |
---|---|
CN1823246A (en) | 2006-08-23 |
JP2007524061A (en) | 2007-08-23 |
WO2005008142A1 (en) | 2005-01-27 |
EP1651910A1 (en) | 2006-05-03 |
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Owner name: CARRIER CORPORATION, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PORTER, KEVIN J.;DOBMEIER, THOMAS J.;DELUCA, GUY;REEL/FRAME:014286/0534;SIGNING DATES FROM 20030710 TO 20030711 |
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STCB | Information on status: application discontinuation |
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