US3831663A - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
US3831663A
US3831663A US00348203A US34820373A US3831663A US 3831663 A US3831663 A US 3831663A US 00348203 A US00348203 A US 00348203A US 34820373 A US34820373 A US 34820373A US 3831663 A US3831663 A US 3831663A
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US
United States
Prior art keywords
heating coil
cooling
pair
coil means
temperatures
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 - Lifetime
Application number
US00348203A
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English (en)
Inventor
D Pithie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxar Space LLC
Original Assignee
Philco Ford Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philco Ford Corp filed Critical Philco Ford Corp
Priority to US00348203A priority Critical patent/US3831663A/en
Priority to CA192,393A priority patent/CA1002318A/en
Priority to IL44227A priority patent/IL44227A/en
Priority to JP3360874A priority patent/JPS531993B2/ja
Application granted granted Critical
Publication of US3831663A publication Critical patent/US3831663A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1405—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/03—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by mounting arrangements
    • F24F1/031—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by mounting arrangements penetrating a wall or window
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/0358—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with dehumidification means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/0373—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heating arrangements
    • F24F1/0375—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heating arrangements with additional radiant heat-discharging elements, e.g. electric heaters
    • 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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/153—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature

Definitions

  • This invention relates to air conditioners, and more particularly to improvements in room air conditioners.
  • the invention proposes apparatus affording improved humidity control for a room air conditioner operating over a wide range of dry bulb temperatures, which apparatus is characterized by inclusion of a cyclically operated refrigerant cooling coil means, and means for energizing a heating element continuously while air is caused to flow sequentially over the cooling coil means and the heating element, in provision of a dehumidification phase of operation. Should the dry bulb temperature rise above a predetermined value, the control apparatus will operate to deenergize the heating element as the cooling coil means continues to perate.
  • the improved control means is, in effect. relative-humidity responsive without need for a humidistat, due to the fact that as the relative humidity in the conditioned space decreases, the cooling capacity ofthe air conditioner, previously dissipated as latent heat of condensation in the removal of moisture, becomes more effective in removal of sensible heat, thereby to lower the ambient temperature in an amount sufficient to deenergize the compressor. Lowering of the moisture content of the air leaves outer, heatexchange surfaces of the evaporator coil means comparatively dry, so that minimal re-evaporation of moisture from the coil means will occur.
  • FIG. 1 is a perspective showing of a room air conditioner embodying the invention
  • FIG. 2 is a plan view of the air conditioner shown in FIG. 1, with the top wall removed and other portions fragmented for convenience of illustration; and,
  • FIG. 3 is a diagrammatic showing of electrical con trol and energization circuitry for apparatus seen in the preceding figures, and embodying features of the invention.
  • FIGS. 1 and 2 a room air conditioner 10, of the window-mounted type, including an outer shell 11 and a front wall provided with inlet and outlet air grilles 12 and 13, respectively.
  • the front wall further includes a control panel 14 provided with a thermostat control knob 15 and a function selector knob 16, both to be described in more detail in what follows.
  • a third control knob 17 operates means (not shown) for venting the room to the outside.
  • a base pan 21 serves as the bottom wall for the air conditioner and serves as a frame for supporting a central, vertically extending partition 22 that cooperates with outer shell 11 to form a condensing unit compartment to one side and an evaporator compartment to the other side.
  • Side walls of shell 11 are provided with air inlet grilles 18 for the condensing unit compartment (see also FIG. 1).
  • base pan 21 supports a condensing coil 23, a motor-compressor 24, a condenser fan 25, a fan motor 26, and a fan shroud 32.
  • base pan 21 supports an evaporator coil 27, a blower housing 28, a blower wheel 29, and electrical heater coils 30 and 31.
  • Compressor 24, condenser coil 23, and evaporator coil 27 are connected in the usual series refrigerant flow circuit, with a capillary tube restrictor (not shown) serving as the means interconnecting condenser 23 and evaporator 27.
  • energy to operate air conditioner 10 is derived from a source of voltage L, connected on the one hand to a selector switch 35, and on the other hand to a thermostatic switch 36.
  • Selector switch 35 includes four switch arms a, b, c and d each connectible to a corresponding one of four contacts 1, 2, 3 and 4.
  • Switch arm 35b further is connectible with a contact 5.
  • Thermostatic switch 36 includes a pair of single-pole, double-throw switches a and b, the arms of which are connected to the source of voltage L and the contacts 6, 7 and 8 of which are connected as shown to one side of the motorcompressor, to one side of electrical heaters, 30, 31, the purpose of which will be described in more detail, and to one side of the coil 37a of fan motor relay 37 which controls a single-pole, double-throw relay switch 37b interconnecting one side of voltage source L and the high and low speed terminals (see HI and LO, FIG. 3) of fan motor 26.
  • selector switch 35 contact 1 is connected to the other terminal of fan motor 26; contact 2 is connected to heater element 31; selector switch contact 3 is connected to heater element 30; selector switch contact 4 is connected to motor compressor 24; and selector switch contact 5 is connected to the fan motor relay coil 37a.
  • Closure of contact -1 by arm 35a causes fan motor 26 to be energized at its low speed; closure of contact 35-2 by arm 35b, together with normally-closed highlimit thermostat 33, establishes an energization circuit for heater 31, but since contact 367 is still open, it will not be energized; and closure of contact 35-4 by arm 35d establishes an energization circuit for compressor 24 along with closure of contact 366. Closure of the switches in the aforementioned combination energizes motor-compressor 24 and fan motor 26 at its low speed.
  • thermostat 36 senses an air temperature of about 64 F, at which time thermostat switch arm 36a moves to its upper contact 367, thereby energizing heater coil 31, while compressor 24 continues to run.
  • thermostat switch arm 36a moves to its upper contact 367, thereby energizing heater coil 31, while compressor 24 continues to run.
  • efficient dehumidification may be achieved in the 65 to 75 F room air temperature range without affecting, to a substantial degree, the dry bulb temperature of the room being cooled.
  • thermostat switch arm 3611 Since the compressor is caused to cycle between the temperature limits applied to contacts 366 and 369 as shown in the right-hand portion of FIG. 3, the heater energizing contact 367 will remain closed by thermostat switch arm 3611. Should the temperature of air flowing over the thermostat rise, for some reason, to values in excess of 67.5 F, the switch arm 36a will move to open contact 367, leaving heater 31 deenergized, as the compressor continues to operate in its dehumidification cycle.
  • the above disclosed apparatus affords a mode of operation that achieves, over a wide range of dry-bulb temperatures. constant moisture removal and reduction in relative humidity in excess of the capability afforded by conventional room air conditioners of similar size.
  • Air conditioning apparatus and characterized in that said control means is operable to effect cyclic energization and deenergization of said cooling means between a first pair of higher and lower temperatures, and of said heating coil means between a second pair of higher and lower temperatures, the lower temperature of said second pair being less than the higher temperature of said first pair but more than the lower temperature of said first pair of temperatures.
  • Air conditioning apparatus according to claim 1 and characterized in that said heating coil means comprises an electric heater.
  • Air conditioning apparatus according to claim 2 and characterized in that said heating coil means comprises an electrical resistance heater.
  • cooling means comprises a refrigerant evaporator energizable at above-freezing temperatures
  • said means for energizing said cooling means comprises a refrigerant motor-compressor.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
US00348203A 1973-04-05 1973-04-05 Air conditioner Expired - Lifetime US3831663A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US00348203A US3831663A (en) 1973-04-05 1973-04-05 Air conditioner
CA192,393A CA1002318A (en) 1973-04-05 1974-02-13 Air conditioner
IL44227A IL44227A (en) 1973-04-05 1974-02-18 Air conditioner with improved humidity control
JP3360874A JPS531993B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-04-05 1974-03-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00348203A US3831663A (en) 1973-04-05 1973-04-05 Air conditioner

Publications (1)

Publication Number Publication Date
US3831663A true US3831663A (en) 1974-08-27

Family

ID=23367025

Family Applications (1)

Application Number Title Priority Date Filing Date
US00348203A Expired - Lifetime US3831663A (en) 1973-04-05 1973-04-05 Air conditioner

Country Status (4)

Country Link
US (1) US3831663A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS531993B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1002318A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IL (1) IL44227A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4144930A (en) * 1977-10-14 1979-03-20 General Motors Corporation Timer for heat-cool room air conditioner
FR2553180A1 (fr) * 1983-10-06 1985-04-12 Fonderie Soc Gen De Appareil de climatisation a circuit frigorifique, notamment pour fenetre
US4534181A (en) * 1984-01-31 1985-08-13 Bbc Industries, Inc. Cooling system
US4537345A (en) * 1982-09-30 1985-08-27 Bbc Industries Inc. Flame control system for heat exchanger
US4813474A (en) * 1986-12-26 1989-03-21 Kabushiki Kaisha Toshiba Air conditioner apparatus with improved dehumidification control
EP0427486A3 (en) * 1989-11-09 1992-05-13 Kabushiki Kaisha Toshiba Air conditioner apparatus
US5421399A (en) * 1992-03-17 1995-06-06 Whirlpool Corporation Cool/heat pump control circuit for a room air conditioner
US20060021359A1 (en) * 2004-07-27 2006-02-02 Lg Electronics Inc. Air conditioner
US20130340448A1 (en) * 2011-03-10 2013-12-26 Carrier Corporation Electric re-heat dehumidification
EP2392869A3 (en) * 2010-06-01 2014-01-15 Mitsubishi Electric Corporation Air conditioner
US11143449B2 (en) * 2009-08-20 2021-10-12 Maersk Container Industry A/S Method for dehumidifying a refrigeration system

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US26593A (en) * 1859-12-27 Henry b
US2536248A (en) * 1945-09-13 1951-01-02 Gen Motors Corp Generator regulation
US2544544A (en) * 1946-05-28 1951-03-06 Chrysler Corp Heating system
US2581122A (en) * 1948-08-14 1952-01-01 Servel Inc Air conditioning
US2610032A (en) * 1949-02-11 1952-09-09 Servel Inc Air conditioning
US3155156A (en) * 1962-03-26 1964-11-03 Westinghouse Electric Corp Controls for air collers and dehumidifiers
US3166120A (en) * 1962-05-23 1965-01-19 Acme Ind Inc Heating or cooling system for heat exchangers
US3212562A (en) * 1963-05-10 1965-10-19 Borg Warner Summer-winter controls
US3349840A (en) * 1965-04-05 1967-10-31 Whirlpool Co Fluid flow control apparatus
US3385349A (en) * 1966-03-01 1968-05-28 Carrier Corp Control arrangement for an air conditioning system
US3694925A (en) * 1970-09-04 1972-10-03 Acf Ind Inc Humidity control in a temperature controlled railway car

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS529781Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-03-17 1977-03-02
JPS558850Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1975-07-09 1980-02-27

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US26593A (en) * 1859-12-27 Henry b
US2536248A (en) * 1945-09-13 1951-01-02 Gen Motors Corp Generator regulation
US2544544A (en) * 1946-05-28 1951-03-06 Chrysler Corp Heating system
US2581122A (en) * 1948-08-14 1952-01-01 Servel Inc Air conditioning
US2610032A (en) * 1949-02-11 1952-09-09 Servel Inc Air conditioning
US3155156A (en) * 1962-03-26 1964-11-03 Westinghouse Electric Corp Controls for air collers and dehumidifiers
US3166120A (en) * 1962-05-23 1965-01-19 Acme Ind Inc Heating or cooling system for heat exchangers
US3212562A (en) * 1963-05-10 1965-10-19 Borg Warner Summer-winter controls
US3349840A (en) * 1965-04-05 1967-10-31 Whirlpool Co Fluid flow control apparatus
US3385349A (en) * 1966-03-01 1968-05-28 Carrier Corp Control arrangement for an air conditioning system
US3694925A (en) * 1970-09-04 1972-10-03 Acf Ind Inc Humidity control in a temperature controlled railway car

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4144930A (en) * 1977-10-14 1979-03-20 General Motors Corporation Timer for heat-cool room air conditioner
US4537345A (en) * 1982-09-30 1985-08-27 Bbc Industries Inc. Flame control system for heat exchanger
FR2553180A1 (fr) * 1983-10-06 1985-04-12 Fonderie Soc Gen De Appareil de climatisation a circuit frigorifique, notamment pour fenetre
US4534181A (en) * 1984-01-31 1985-08-13 Bbc Industries, Inc. Cooling system
US4813474A (en) * 1986-12-26 1989-03-21 Kabushiki Kaisha Toshiba Air conditioner apparatus with improved dehumidification control
EP0427486A3 (en) * 1989-11-09 1992-05-13 Kabushiki Kaisha Toshiba Air conditioner apparatus
US5421399A (en) * 1992-03-17 1995-06-06 Whirlpool Corporation Cool/heat pump control circuit for a room air conditioner
US20060021359A1 (en) * 2004-07-27 2006-02-02 Lg Electronics Inc. Air conditioner
US7827810B2 (en) * 2004-07-27 2010-11-09 Lg Electronics Inc. Air conditioner
US11143449B2 (en) * 2009-08-20 2021-10-12 Maersk Container Industry A/S Method for dehumidifying a refrigeration system
EP2392869A3 (en) * 2010-06-01 2014-01-15 Mitsubishi Electric Corporation Air conditioner
US20130340448A1 (en) * 2011-03-10 2013-12-26 Carrier Corporation Electric re-heat dehumidification
US10473344B2 (en) * 2011-03-10 2019-11-12 Carrier Corporation Electric re-heat dehumidification

Also Published As

Publication number Publication date
JPS49129356A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-12-11
IL44227A0 (en) 1974-05-16
CA1002318A (en) 1976-12-28
JPS531993B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-01-24
IL44227A (en) 1976-10-31

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