US2932178A - Air conditioning apparatus - Google Patents

Air conditioning apparatus Download PDF

Info

Publication number
US2932178A
US2932178A US776296A US77629658A US2932178A US 2932178 A US2932178 A US 2932178A US 776296 A US776296 A US 776296A US 77629658 A US77629658 A US 77629658A US 2932178 A US2932178 A US 2932178A
Authority
US
United States
Prior art keywords
heat exchanger
air
compressor
outdoor
indoor
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
US776296A
Inventor
Armstrong Alfred
Michael D Ulich
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.)
CBS Corp
Original Assignee
Westinghouse Electric 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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US776296A priority Critical patent/US2932178A/en
Application granted granted Critical
Publication of US2932178A publication Critical patent/US2932178A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F24F3/153—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
    • 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

Definitions

  • This invention relates to air conditioning apparatus and more particularly to a compression refrigeration air conditioning unit adapted for regulation of humidity content of the conditioned air. 7
  • This invention relates to a refrigerating system or circuit, the. operation of which can be alteredor modified to effect substantially pure dehumidification of air, i.e. dehumdification without reduction of the sensible heat in the conditioned air. Moreover, this invention requires only simple additions to and changes in a refrigerating system and, consequently, air conditioning units, such as those employed to con.- dition one or more rooms in a private residence.
  • both the indoor air and outdoor air portions of the air conditioning unit are equipped with two heat exchangers.
  • a single compressor generally disposed in the outdoor air portion of the unit, is employed to circulate, or pump, refrigerant fluid through these several heat exchangers.
  • One'indoor heat exchanger and one outdoor heat exchanger are connected' to the compressor by means including a refrigerant flow reversing device which selectively directs refrigerant through the outdoor heat exchanger to the indoor heat exchanger or through the indoor heat exchanger to the outdoor heat exchanger, whereby heat is selectively absorbed by one of saidheat exchangers and other of said heat exchangers.
  • This indoor heat exchanger tooperate either as an evaporator, for cooling indoor air or as a condenser for heating indoor air.
  • the other two heat exchangers i.e., the other indoor heat exchanger and the other outdoor heatexchanger
  • the compressor in parallel refrigerant flow relationship to the two reversible heat exchangers that said other indoor heat exchanger always functions as an evaporator to cool indoor air,-and said other outdoor heat exchanger always functions as a condenser to dissipate heat to outdoor air.
  • the object of connecting the several heat exchangers in the aforesaid manner is to enable bothindoor heat e x, changers to function as evaporators for the purpose of cooling indoor air'when high temperature conditions, either with or without high humidity, are encountered,
  • Fig. 1 is a simplified illustration of an air conditioning unit embodying this invention
  • Fig. 2 is a schematic refrigerant circuit diagram of a refrigeration system embodying the invention
  • Fig. 3 is another diagram of the refrigeration system showing a different operating condition thereof.
  • the air conditioning unit embodying the invention includes a casing 11, having a' partition 12 therein that divides the unit into an indoor section 13 and an outdoor section 14.
  • the casing 11 is adapted to be mounted within an opening, such as a window, of a building wall 15 in such a manner that the indoor section, 13, com-.
  • the outdoor section, 14, communicates with outdoor air, i.e. air outside the conditioned enclosure.
  • the indoor section 13 contains first and second heat exchangers 16 and 17 which are arranged in facing relationship adjacent one another.
  • Air to be conditioned enters the indoor section of the unit through an inlet opening 18 and is circulated by air propelling means, such as a motor driven propeller fan 19, over, or through, first indoor heat exchanger 16 and then indoor heat exchanger 17, and is returned to the conditioned enclosure through an outlet 20.
  • air propelling means such as a motor driven propeller fan 19
  • Heat is absorbed from and/or dissipated to the outdoor air by first and second outdoor heat exchangers 22 and 23 located within outdoor, air section 14 of the unit. These heat exchangers are also preferably disposed in face-to-face relationship adjacent one another. Outdoor air is circulated over heat exchangers 22 and 23 by suit-- able air propelling means, such as a motor driven propeller fan 24. a
  • the several heat exchangers form part of a compres sion refrigeration system, which includes 'a compressor 25 preferably located in the outdoor section of the unit.”
  • the compressor 25, in accordance with conventional practice, is preferably enclosed within a sealed casing which also'houses the motor for driving the compressor.
  • the compressor 25 includesconduit' pressor.
  • the compressor 25 is adapted to pump, refrigerant fluid through two parallel refrigerant flow paths, each of which paths includes one indoor heat ex-f changer and one outdoor heat exchanger.
  • the first flow path is conventional, in that a discharge conduit 28 conveys refrigerant from the compressor outlet 27 tothe first outdoor heat exchanger 22, wherein heat is trans ferred to the outdoor air and refrigerant is condensedL
  • the outdoor heat exchanger 22 is connected to the first indoor heat exchanger 16 by conduit means including a small bore restrictor tube 29. The pressure of the refrigerant flowing through tube 29 is progressively reduced and the refrigerant is thereafter evaporated at low pres-- sure in the indoor heat exchanger 16 to absorb heat from indoor air.
  • Vaporous refrigerant is returned from heat via a suction conduit 30.
  • Outdoor heat exchanger 22 functions as a exchanger 16 to the compressor inlet 26 condenser and indoor heat exchanger 16 functions as an evaporator in this first refrigerant flow path.
  • air conditioning apparatus including a compression refrigeration system, a compressor, an indoor heat exchanger, an evaporator, means for directing air to be conditioned first over said evaporator and then over said indoor heat exchanger, a condenser, an outdoor heat exchanger, means for directing outside air first over said condenser and then over said outdoor heat exchanger, conduit means for routing refrigerant from said compressor through said condenser to said evaporator and back to said compressor, and means including a reversing valve for selectively routing refrigerant from said compressor through said outdoor heat exchanger to said indoor heat exchanger or through said indoor heat exchanger to said outdoor heat exchanger, whereby said indoor heat exchanger can be connected in parallel refrigerant flow relationship with either said evaporator or said condenser.
  • air conditioning apparatus including a compression refrigeration system, a compressor, an indoor heat exchanger, an evaporator arranged in face-to-face relationship with said indoor heat exchanger, means for directing air to be conditioned first over said evaporator and then over said indoor heat exchanger, a condenser, an outdoor heat exchanger arranged in face-to-face relationship with said condenser, means for directing outside air first over said condenser and then over said outdoor heat exchanger, conduit means for routing refrigerant from said compressor through said condenser to said evaporator and back to said compressor, and means including a reversing valve for selectively routing refrigerant from said compressor through said outdoor heat exchanger to said indoor heat exchanger or through said indoor heat exchanger to said outdoor heat exchanger, whereby said indoor heat exchanger can be connected in parallel refrigerant flow relationship with either said evaporator or said condenser.
  • air conditioning apparatus including a compression refrigeration system, a compressor having an inlet and an outlet, an indoor heat exchanger, an outdoor heat exchanger, means including a bidirectional expansion device connecting said outdoor heat exchanger to said indoor heat exchanger and permitting refrigerant flow in either direction from one to the other of said heat exchangers, means including a reversing valve for selectively connecting the outlet of said compressor to said outdoor heat exchanger and the inlet of said compressor to said indoor heat exchanger or the outlet of said compressor to said indoor heat exchanger and the inlet of said compressor to said outdoor heat exchanger, an evaporator, a. concirculating indoor air over said indoor heat exchanger and said evaporator, and means for circulating outdoor air over said outdoor heat exchanger and said condenser.
  • air conditioning apparatus including a compression refrigeration system, a compressor having an inlet and an outlet, an indoor heat exchanger, an outdoor heat exchanger, means including a bidirectional expansion device connecting said outdoor heat exchanger to said indoor heat exchanger and permitting refrigerant flow in either direction from one to the other of said heat exchangers, means including a reversing valve for selectively connecting the outlet of said compressor to said outdoor heat exchanger and the inlet of said compressor to said indoor heat exchanger or the outlet of said compressor to said indoor heat exchanger and the inlet of said compressor to said outdoor heat exchanger, an evaporator disposed adjacent said indoor heat exchanger, a condenser disposed adjacent said outdoor heat exchanger, means connecting said compressor, condenser, and evaporator for routing refrigerant from said compressor through said condenser to said evaporator regardless of the condition of said reversing valve, means for circulating indoor air first over said evaporator and then over said indoor heat exchanger, and means for circulating outdoor air first over said condenser and then
  • a compressor having an inlet and an outlet, first and second indoor heat exchangers, first and second outdoor heat exchangers, means including an expansion device connecting the first outdoor heat exchanger to the first indoor heat exchanger, conduit means connecting the outlet of said compressor to said first outdoor heat exchanger and the inlet of said compressor to said first indoor heat exchanger, means including a bidirectional expansion device connecting said second outdoor heat exchanger to said second indoor heat exchanger and permitting refrigerant to flow in either direction from one to the other of said second heat exchangers, and means including a reversing valve for selectively connecting the outlet of said compressor to said second outdoor heat exchanger and the inlet of said compressor to said second indoor heat exchanger or the outlet of said compressor to said second indoor heat exchanger and the inlet of the compressor to said second outdoor heat exchanger.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Description

' dissipated by the United States Patent cc Patented Apr. 12,
2,932,178 AIR CONDITIONING APPARATUS Application November 25, 1958, Serial No. 776,296
' 6 Claims. (Cl. 62-324) This invention relates to air conditioning apparatus and more particularly to a compression refrigeration air conditioning unit adapted for regulation of humidity content of the conditioned air. 7
In maintaining air conditions within an enclosure that are comfortable to humans, it is necessary that the moisture content of the air, as well as the air temperature, be controlled. High air temperature is generally accompanied by high humidity and both conditions can be corrected, or rendered satisfacto by passing the air through an air cooling unit, because dehumidi fication to an acceptable level generally accompaniescooling. There are, however, periods during which the air temperature is at an acceptable level but the air nevertheless contains a high percentage of moisture, so that discomfort is experienced. Under these conditions dehumidification, unaccompanied by reduction of the sensible heat in the air, is desirable. V
This invention relates to a refrigerating system or circuit, the. operation of which can be alteredor modified to effect substantially pure dehumidification of air, i.e. dehumdification without reduction of the sensible heat in the conditioned air. Moreover, this invention requires only simple additions to and changes in a refrigerating system and, consequently, air conditioning units, such as those employed to con.- dition one or more rooms in a private residence.
In accordance with this invention, both the indoor air and outdoor air portions of the air conditioning unit are equipped with two heat exchangers. A single compressor, generally disposed in the outdoor air portion of the unit, is employed to circulate, or pump, refrigerant fluid through these several heat exchangers. One'indoor heat exchanger and one outdoor heat exchanger are connected' to the compressor by means including a refrigerant flow reversing device which selectively directs refrigerant through the outdoor heat exchanger to the indoor heat exchanger or through the indoor heat exchanger to the outdoor heat exchanger, whereby heat is selectively absorbed by one of saidheat exchangers and other of said heat exchangers. This enables this indoor heat exchanger tooperate either as an evaporator, for cooling indoor air or as a condenser for heating indoor air. I a 5, a
Further, in accordance with the invention, the other two heat exchangers, i.e., the other indoor heat exchanger and the other outdoor heatexchanger, are connected to the compressor in parallel refrigerant flow relationship to the two reversible heat exchangers that said other indoor heat exchanger always functions as an evaporator to cool indoor air,-and said other outdoor heat exchanger always functions as a condenser to dissipate heat to outdoor air.
The object of connecting the several heat exchangers in the aforesaid manner is to enable bothindoor heat e x, changers to function as evaporators for the purpose of cooling indoor air'when high temperature conditions, either with or without high humidity, are encountered,
may be utilized in low cost and further, to enable one indoor heat exchanger to function as a condenser for reheating air that hasbeen cooled; and dehumidified by the other indoor heat exchanger, so that the indoor air is dehumidified without sensible cooling when only high humidity conditions are encountered. The several features, objects and advantages of the invention are'elucidated in the following detailed description of which the'accompany drawing forms a part and wherein: p a Fig. 1 is a simplified illustration of an air conditioning unit embodying this invention;
Fig. 2 is a schematic refrigerant circuit diagram of a refrigeration system embodying the invention; and Fig. 3 is another diagram of the refrigeration system showing a different operating condition thereof. 1 The air conditioning unit embodying the invention includes a casing 11, having a' partition 12 therein that divides the unit into an indoor section 13 and an outdoor section 14. The casing 11 is adapted to be mounted within an opening, such as a window, of a building wall 15 in such a manner that the indoor section, 13, com-.
municates with air to be conditioned in other enclosure. The outdoor section, 14, communicates with outdoor air, i.e. air outside the conditioned enclosure. The indoor section 13 contains first and second heat exchangers 16 and 17 which are arranged in facing relationship adjacent one another. Air to be conditioned enters the indoor section of the unit through an inlet opening 18 and is circulated by air propelling means, such as a motor driven propeller fan 19, over, or through, first indoor heat exchanger 16 and then indoor heat exchanger 17, and is returned to the conditioned enclosure through an outlet 20. Moisture that is condensed from the air as a result of cooling falls into a collection trough 21 and is conveyed from the conditioned enclosure by suitable drain means (not shown).
Heat is absorbed from and/or dissipated to the outdoor air by first and second outdoor heat exchangers 22 and 23 located within outdoor, air section 14 of the unit. These heat exchangers are also preferably disposed in face-to-face relationship adjacent one another. Outdoor air is circulated over heat exchangers 22 and 23 by suit-- able air propelling means, such as a motor driven propeller fan 24. a
The several heat exchangers form part of a compres sion refrigeration system, which includes 'a compressor 25 preferably located in the outdoor section of the unit." The compressor 25, in accordance with conventional practice, is preferably enclosed within a sealed casing which also'houses the motor for driving the compressor. As
a room or best shown in Fig. 2, the compressor 25 includesconduit' pressor.
in such a manner The compressor 25 is adapted to pump, refrigerant fluid through two parallel refrigerant flow paths, each of which paths includes one indoor heat ex-f changer and one outdoor heat exchanger. The first flow path is conventional, in that a discharge conduit 28 conveys refrigerant from the compressor outlet 27 tothe first outdoor heat exchanger 22, wherein heat is trans ferred to the outdoor air and refrigerant is condensedL The outdoor heat exchanger 22 is connected to the first indoor heat exchanger 16 by conduit means including a small bore restrictor tube 29. The pressure of the refrigerant flowing through tube 29 is progressively reduced and the refrigerant is thereafter evaporated at low pres-- sure in the indoor heat exchanger 16 to absorb heat from indoor air. Vaporous refrigerant is returned from heat via a suction conduit 30. 7 Outdoor heat exchanger 22 functions as a exchanger 16 to the compressor inlet 26 condenser and indoor heat exchanger 16 functions as an evaporator in this first refrigerant flow path.
or convey,-
providing a second refrigerant flow path parallel to said first refrigerant flow path and adapted to selectively direct refrigerant from said compressor through said second outdoor heat exchanger to said second indoor heat exchanger or through said second indoor heat exchanger to said second outdoor heat exchanger, whereby heat is selectively absorbed in one of said second heat exchangers and dissipated by the other of said second heat exchangers.
2. In air conditioning apparatus including a compression refrigeration system, a compressor, an indoor heat exchanger, an evaporator, means for directing air to be conditioned first over said evaporator and then over said indoor heat exchanger, a condenser, an outdoor heat exchanger, means for directing outside air first over said condenser and then over said outdoor heat exchanger, conduit means for routing refrigerant from said compressor through said condenser to said evaporator and back to said compressor, and means including a reversing valve for selectively routing refrigerant from said compressor through said outdoor heat exchanger to said indoor heat exchanger or through said indoor heat exchanger to said outdoor heat exchanger, whereby said indoor heat exchanger can be connected in parallel refrigerant flow relationship with either said evaporator or said condenser.
3. In air conditioning apparatus including a compression refrigeration system, a compressor, an indoor heat exchanger, an evaporator arranged in face-to-face relationship with said indoor heat exchanger, means for directing air to be conditioned first over said evaporator and then over said indoor heat exchanger, a condenser, an outdoor heat exchanger arranged in face-to-face relationship with said condenser, means for directing outside air first over said condenser and then over said outdoor heat exchanger, conduit means for routing refrigerant from said compressor through said condenser to said evaporator and back to said compressor, and means including a reversing valve for selectively routing refrigerant from said compressor through said outdoor heat exchanger to said indoor heat exchanger or through said indoor heat exchanger to said outdoor heat exchanger, whereby said indoor heat exchanger can be connected in parallel refrigerant flow relationship with either said evaporator or said condenser.
4. In air conditioning apparatus including a compression refrigeration system, a compressor having an inlet and an outlet, an indoor heat exchanger, an outdoor heat exchanger, means including a bidirectional expansion device connecting said outdoor heat exchanger to said indoor heat exchanger and permitting refrigerant flow in either direction from one to the other of said heat exchangers, means including a reversing valve for selectively connecting the outlet of said compressor to said outdoor heat exchanger and the inlet of said compressor to said indoor heat exchanger or the outlet of said compressor to said indoor heat exchanger and the inlet of said compressor to said outdoor heat exchanger, an evaporator, a. concirculating indoor air over said indoor heat exchanger and said evaporator, and means for circulating outdoor air over said outdoor heat exchanger and said condenser.
5. In air conditioning apparatus including a compression refrigeration system, a compressor having an inlet and an outlet, an indoor heat exchanger, an outdoor heat exchanger, means including a bidirectional expansion device connecting said outdoor heat exchanger to said indoor heat exchanger and permitting refrigerant flow in either direction from one to the other of said heat exchangers, means including a reversing valve for selectively connecting the outlet of said compressor to said outdoor heat exchanger and the inlet of said compressor to said indoor heat exchanger or the outlet of said compressor to said indoor heat exchanger and the inlet of said compressor to said outdoor heat exchanger, an evaporator disposed adjacent said indoor heat exchanger, a condenser disposed adjacent said outdoor heat exchanger, means connecting said compressor, condenser, and evaporator for routing refrigerant from said compressor through said condenser to said evaporator regardless of the condition of said reversing valve, means for circulating indoor air first over said evaporator and then over said indoor heat exchanger, and means for circulating outdoor air first over said condenser and then over said outdoor heat exchanger.
6. In a refrigeration circuit for air conditioning apparatus, a compressor having an inlet and an outlet, first and second indoor heat exchangers, first and second outdoor heat exchangers, means including an expansion device connecting the first outdoor heat exchanger to the first indoor heat exchanger, conduit means connecting the outlet of said compressor to said first outdoor heat exchanger and the inlet of said compressor to said first indoor heat exchanger, means including a bidirectional expansion device connecting said second outdoor heat exchanger to said second indoor heat exchanger and permitting refrigerant to flow in either direction from one to the other of said second heat exchangers, and means including a reversing valve for selectively connecting the outlet of said compressor to said second outdoor heat exchanger and the inlet of said compressor to said second indoor heat exchanger or the outlet of said compressor to said second indoor heat exchanger and the inlet of the compressor to said second outdoor heat exchanger.
References Cited in the file of this patent UNITED STATES PATENTS 2,241,060 Gibson May 6, 1941 2,619,812 Burgess Dec. 2, 1952 2,785,540 Biehn Mar. 19, 1957 Notice of Adverse Decision in Interference In Interference No. 91,359 involving Patent No. 2,932,17 8, A. Armstrong and M. D. Ulich, Air conditioning apparatus, final decision adverse to the patentees was rendered J an. 30, 1963, as to claims 1 i and 6.
[Ofiicz'al Gazette August 27, 1963.]
US776296A 1958-11-25 1958-11-25 Air conditioning apparatus Expired - Lifetime US2932178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US776296A US2932178A (en) 1958-11-25 1958-11-25 Air conditioning apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US776296A US2932178A (en) 1958-11-25 1958-11-25 Air conditioning apparatus

Publications (1)

Publication Number Publication Date
US2932178A true US2932178A (en) 1960-04-12

Family

ID=25106987

Family Applications (1)

Application Number Title Priority Date Filing Date
US776296A Expired - Lifetime US2932178A (en) 1958-11-25 1958-11-25 Air conditioning apparatus

Country Status (1)

Country Link
US (1) US2932178A (en)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149479A (en) * 1961-05-01 1964-09-22 Rudy Mfg Company Evaporator-condenser unit
US3421339A (en) * 1967-05-31 1969-01-14 Trane Co Unidirectional heat pump system
US3460353A (en) * 1967-11-07 1969-08-12 Hitachi Ltd Air conditioner
US3729952A (en) * 1971-09-09 1973-05-01 Carrier Corp Self-contained air conditioning unit
US3779031A (en) * 1970-08-21 1973-12-18 Hitachi Ltd Air-conditioning system for cooling dehumidifying or heating operations
US3921413A (en) * 1974-11-13 1975-11-25 American Air Filter Co Air conditioning unit with reheat
US3978684A (en) * 1975-04-17 1976-09-07 Thermo King Corporation Refrigeration system
US4057977A (en) * 1976-10-06 1977-11-15 General Electric Company Reverse cycle heat pump circuit
USRE30745E (en) * 1976-10-06 1981-09-22 General Electric Company Reverse cycle heat pump circuit
USRE30765E (en) * 1976-09-07 1981-10-13 Carrier Corporation Heat pump system
US4332137A (en) * 1979-10-22 1982-06-01 Carrier Corporation Heat exchange apparatus and method having two refrigeration circuits
US4938032A (en) * 1986-07-16 1990-07-03 Mudford Graeme C Air-conditioning system
US5065586A (en) * 1990-07-30 1991-11-19 Carrier Corporation Air conditioner with dehumidifying mode
US5088295A (en) * 1990-07-30 1992-02-18 Carrier Corporation Air conditioner with dehumidification mode
US5823006A (en) * 1995-03-30 1998-10-20 Samsung Electronics Co., Ltd. Air conditioner and control apparatus thereof
US6212892B1 (en) * 1998-07-27 2001-04-10 Alexander Pinkus Rafalovich Air conditioner and heat pump with dehumidification
US20060137371A1 (en) * 2004-12-29 2006-06-29 York International Corporation Method and apparatus for dehumidification
US20060288716A1 (en) * 2005-06-23 2006-12-28 York International Corporation Method for refrigerant pressure control in refrigeration systems
US20060288713A1 (en) * 2005-06-23 2006-12-28 York International Corporation Method and system for dehumidification and refrigerant pressure control
US20070120841A1 (en) * 2002-12-10 2007-05-31 Lg Electronics Inc. Video overlay device of mobile telecommunication terminal
US20080223050A1 (en) * 2007-03-13 2008-09-18 Dri-Eaz Products, Inc. Dehumidification systems and methods for extracting moisture from water damaged structures
US20100125367A1 (en) * 2008-11-17 2010-05-20 Dri-Eaz Products, Inc. Methods and systems for determining dehumidifier performance
US20100269526A1 (en) * 2009-04-27 2010-10-28 Robert Pendergrass Systems and methods for operating and monitoring dehumidifiers
USD634414S1 (en) 2010-04-27 2011-03-15 Dri-Eaz Products, Inc. Dehumidifier housing
US8784529B2 (en) 2011-10-14 2014-07-22 Dri-Eaz Products, Inc. Dehumidifiers having improved heat exchange blocks and associated methods of use and manufacture
EP2835589A3 (en) * 2013-08-06 2015-03-04 LG Electronics, Inc. Air conditioner
USD731632S1 (en) 2012-12-04 2015-06-09 Dri-Eaz Products, Inc. Compact dehumidifier

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2241060A (en) * 1939-08-24 1941-05-06 Gen Electric Heat pump system
US2619812A (en) * 1950-06-22 1952-12-02 Drying Systems Inc Heat pump apparatus
US2785540A (en) * 1953-09-30 1957-03-19 Westinghouse Electric Corp Heat pumps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2241060A (en) * 1939-08-24 1941-05-06 Gen Electric Heat pump system
US2619812A (en) * 1950-06-22 1952-12-02 Drying Systems Inc Heat pump apparatus
US2785540A (en) * 1953-09-30 1957-03-19 Westinghouse Electric Corp Heat pumps

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149479A (en) * 1961-05-01 1964-09-22 Rudy Mfg Company Evaporator-condenser unit
US3421339A (en) * 1967-05-31 1969-01-14 Trane Co Unidirectional heat pump system
US3460353A (en) * 1967-11-07 1969-08-12 Hitachi Ltd Air conditioner
US3779031A (en) * 1970-08-21 1973-12-18 Hitachi Ltd Air-conditioning system for cooling dehumidifying or heating operations
US3729952A (en) * 1971-09-09 1973-05-01 Carrier Corp Self-contained air conditioning unit
US3921413A (en) * 1974-11-13 1975-11-25 American Air Filter Co Air conditioning unit with reheat
US3978684A (en) * 1975-04-17 1976-09-07 Thermo King Corporation Refrigeration system
USRE30765E (en) * 1976-09-07 1981-10-13 Carrier Corporation Heat pump system
US4057977A (en) * 1976-10-06 1977-11-15 General Electric Company Reverse cycle heat pump circuit
USRE30745E (en) * 1976-10-06 1981-09-22 General Electric Company Reverse cycle heat pump circuit
US4332137A (en) * 1979-10-22 1982-06-01 Carrier Corporation Heat exchange apparatus and method having two refrigeration circuits
US4938032A (en) * 1986-07-16 1990-07-03 Mudford Graeme C Air-conditioning system
US5065586A (en) * 1990-07-30 1991-11-19 Carrier Corporation Air conditioner with dehumidifying mode
US5088295A (en) * 1990-07-30 1992-02-18 Carrier Corporation Air conditioner with dehumidification mode
US5823006A (en) * 1995-03-30 1998-10-20 Samsung Electronics Co., Ltd. Air conditioner and control apparatus thereof
US6212892B1 (en) * 1998-07-27 2001-04-10 Alexander Pinkus Rafalovich Air conditioner and heat pump with dehumidification
WO2002059532A1 (en) * 1998-07-27 2002-08-01 Alexander Rafalovich Air conditioner and heat pump with dehumidification
US20070120841A1 (en) * 2002-12-10 2007-05-31 Lg Electronics Inc. Video overlay device of mobile telecommunication terminal
US20060137371A1 (en) * 2004-12-29 2006-06-29 York International Corporation Method and apparatus for dehumidification
US20100229579A1 (en) * 2004-12-29 2010-09-16 John Terry Knight Method and apparatus for dehumidification
US7845185B2 (en) 2004-12-29 2010-12-07 York International Corporation Method and apparatus for dehumidification
US20060288716A1 (en) * 2005-06-23 2006-12-28 York International Corporation Method for refrigerant pressure control in refrigeration systems
US7559207B2 (en) 2005-06-23 2009-07-14 York International Corporation Method for refrigerant pressure control in refrigeration systems
US20060288713A1 (en) * 2005-06-23 2006-12-28 York International Corporation Method and system for dehumidification and refrigerant pressure control
US20110167846A1 (en) * 2005-06-23 2011-07-14 York International Corporation Method and system for dehumidification and refrigerant pressure control
US8122729B2 (en) 2007-03-13 2012-02-28 Dri-Eaz Products, Inc. Dehumidification systems and methods for extracting moisture from water damaged structures
US20080223050A1 (en) * 2007-03-13 2008-09-18 Dri-Eaz Products, Inc. Dehumidification systems and methods for extracting moisture from water damaged structures
US20100125367A1 (en) * 2008-11-17 2010-05-20 Dri-Eaz Products, Inc. Methods and systems for determining dehumidifier performance
US8290742B2 (en) 2008-11-17 2012-10-16 Dri-Eaz Products, Inc. Methods and systems for determining dehumidifier performance
US20100269526A1 (en) * 2009-04-27 2010-10-28 Robert Pendergrass Systems and methods for operating and monitoring dehumidifiers
US8572994B2 (en) 2009-04-27 2013-11-05 Dri-Eaz Products, Inc. Systems and methods for operating and monitoring dehumidifiers
US9089814B2 (en) 2009-04-27 2015-07-28 Dri-Eaz Products, Inc. Systems and methods for operating and monitoring dehumidifiers
USD634414S1 (en) 2010-04-27 2011-03-15 Dri-Eaz Products, Inc. Dehumidifier housing
US8784529B2 (en) 2011-10-14 2014-07-22 Dri-Eaz Products, Inc. Dehumidifiers having improved heat exchange blocks and associated methods of use and manufacture
USD731632S1 (en) 2012-12-04 2015-06-09 Dri-Eaz Products, Inc. Compact dehumidifier
EP2835589A3 (en) * 2013-08-06 2015-03-04 LG Electronics, Inc. Air conditioner

Similar Documents

Publication Publication Date Title
US2932178A (en) Air conditioning apparatus
US3301002A (en) Conditioning apparatus
US3150502A (en) No-freeze refrigerant control
US2391859A (en) Room cooling device
US2893218A (en) Air conditioning systems
US2332730A (en) Refrigerating apparatus
US2796743A (en) Plural stage air conditioning system
US2391151A (en) Refrigerating apparatus
US3460353A (en) Air conditioner
US3070972A (en) Automatic controls for room air conditioning unit
US2232459A (en) Refrigerating apparatus
US3006613A (en) Self-contained air conditioning apparatus adapted for heating, cooling and dehumidification
US3159981A (en) Heat pump including frost control means
US2978881A (en) Air conditioning apparatus
US3138941A (en) Controls for refrigeration systems having air cooled condensers
US2940281A (en) Air conditioning apparatus with provision for selective reheating
US2984458A (en) Air conditioning
US4346566A (en) Refrigeration system gravity defrost
US2320432A (en) Refrigerating apparatus
US3407623A (en) Oil and motor cooling in a refrigeration system
US3009331A (en) Air conditioning systems
US2774219A (en) Automobile refrigerating apparatus
US2272099A (en) Refrigerating apparatus
US3040543A (en) Air conditioning unit having low fan speed over-ride means
US2333309A (en) Refrigerating apparatus