WO2005008142A1 - Control apparatus and method of multistage air conditioning system - Google Patents

Control apparatus and method of multistage air conditioning system Download PDF

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Publication number
WO2005008142A1
WO2005008142A1 PCT/US2004/022117 US2004022117W WO2005008142A1 WO 2005008142 A1 WO2005008142 A1 WO 2005008142A1 US 2004022117 W US2004022117 W US 2004022117W WO 2005008142 A1 WO2005008142 A1 WO 2005008142A1
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WIPO (PCT)
Prior art keywords
stages
inputs
input
binary
control
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Application number
PCT/US2004/022117
Other languages
French (fr)
Inventor
Kevin J. Porter
Guy De Luca
Thomas J. Dobmeier
Original Assignee
Carrier Corporation
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Filing date
Publication date
Application filed by Carrier Corporation filed Critical Carrier Corporation
Priority to EP04777908A priority Critical patent/EP1651910A1/en
Priority to JP2006520240A priority patent/JP2007524061A/en
Publication of WO2005008142A1 publication Critical patent/WO2005008142A1/en

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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
  • Conventional systems may frequently have only a ' discrete number of inputs which can be utilized to signify control actions of the device.
  • 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.
  • 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.
  • Figure 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 1 .
  • 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 yl 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 yl, 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 shows one configuration of a conventional control system wherein the microprocessor typically turns on the first stage of cooling when the yl input is on, and turns on all stages of the system when the y2 input is on.
  • the yl, y2 inputs can be used to control the system with only one or three stages active.
  • the yl 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.
  • 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.
  • This advantageously allows for a 2 input system to operate with 4 different levels of stages in operation as illustrated in Table 3, and is particularly advantageous as compared to conventional control systems.
  • 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.
  • 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. 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.
  • 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 . 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 .

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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

CONTROL APPARATUS AND METHOD OF A ULTISTAGE AIR CONDITIONING SYSTEM
BACKGROUND OF THE INVENTION 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.
SUMMARY OF THE INVENTION 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.
BRIEF DESCRIPTION OF THE DRAWINGS A detailed description of preferred embodiments of the present invention follows, with reference to the attached Figure 1, which schematically illustrates a system and method in accordance with the present invention.
DETAILED DESCRIPTION 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. Figure 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 1 . , 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. As identified above, thermostat 14 is frequently a device with a limited number of outputs, in this case labeled as yl and y2. Further, 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. Thus, 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. In accordance with the invention, the inputs yl, 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) Yl Y2 # of stages 0 0 0 1 0 1 0 1 3 , 1 1 3
TABLE 2 Standard control system (Option 2) Yl Y2 # of stages 0 0 0 1 0 2 TABLE 3 Bin-iry control system Yl Y2 # of stages turned on by the microprocessor 0 0 0 1 0 1 0 1 2 1 1 3
Table 1 shows one configuration of a conventional control system wherein the microprocessor typically turns on the first stage of cooling when the yl input is on, and turns on all stages of the system when the y2 input is on. Thus, in such system, the yl, 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 yl 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 different levels 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
Figure imgf000007_0001
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

WHAT IS CLAIMED IS: 1. A method for interpreting input on a X input multistage 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.
PCT/US2004/022117 2003-07-14 2004-07-12 Control apparatus and method of multistage air conditioning system WO2005008142A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04777908A EP1651910A1 (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

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/619,714 2003-07-14
US10/619,714 US20050011207A1 (en) 2003-07-14 2003-07-14 Control of air conditioning system with limited number of discrete inputs

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WO2005008142A1 true WO2005008142A1 (en) 2005-01-27

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7291626B1 (en) 1998-04-09 2007-11-06 John Hopkins University School Of Medicine Inhibitors of hedgehog signaling pathways, compositions and uses related thereto
CA2386190C (en) 1999-10-13 2009-04-14 Johns Hopkins University School Of Medicine Regulators of the hedgehog pathway, compositions and uses related thereto
US8156751B2 (en) * 2005-05-24 2012-04-17 Emerson Climate Technologies, Inc. Control and protection system for a variable capacity compressor

Citations (6)

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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
US4530395A (en) * 1982-10-14 1985-07-23 Parker Electronics, Inc. Single zone HVAC controlled for operation in multiple zone arrangement
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
EP0618524A2 (en) * 1993-04-02 1994-10-05 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

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US3797560A (en) * 1972-06-21 1974-03-19 I Zaharoni Control system for environmental conditioning units
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
US4535602A (en) * 1983-10-12 1985-08-20 Richard H. Alsenz Shift logic control apparatus for unequal capacity compressors in a refrigeration system
US6540148B1 (en) * 2001-07-27 2003-04-01 Johnson Controls Technology Company Method and apparatus for sequencing multistage systems of known relative capacities

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4530395A (en) * 1982-10-14 1985-07-23 Parker Electronics, Inc. Single zone HVAC controlled for operation in multiple zone arrangement
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
EP0618524A2 (en) * 1993-04-02 1994-10-05 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

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EP1651910A1 (en) 2006-05-03
CN1823246A (en) 2006-08-23
US20050011207A1 (en) 2005-01-20
JP2007524061A (en) 2007-08-23

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