US3166121A - Space heat exchange unit - Google Patents

Space heat exchange unit Download PDF

Info

Publication number
US3166121A
US3166121A US171930A US17193062A US3166121A US 3166121 A US3166121 A US 3166121A US 171930 A US171930 A US 171930A US 17193062 A US17193062 A US 17193062A US 3166121 A US3166121 A US 3166121A
Authority
US
United States
Prior art keywords
heat exchange
exchange unit
space heat
temperature
tube
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
US171930A
Inventor
Boysen Arne
Larkfeldt Birger
Steinholtz Gosta
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.)
Svenska Flaktfabriken AB
Original Assignee
Svenska Flaktfabriken AB
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
Priority to NL121460D priority Critical patent/NL121460C/xx
Priority to DEA39426A priority patent/DE1231871B/en
Priority to GB2695/62A priority patent/GB998025A/en
Priority to CH99362A priority patent/CH378495A/en
Priority to FR886051A priority patent/FR1312802A/en
Application filed by Svenska Flaktfabriken AB filed Critical Svenska Flaktfabriken AB
Priority to US171930A priority patent/US3166121A/en
Application granted granted Critical
Publication of US3166121A publication Critical patent/US3166121A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/12—Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid
    • 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
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • 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
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves

Definitions

  • the heat exchanging surface for a given cooling load must be large, as the temperature of the cooling medium cannot be substantially lower than the temperature of the ventilating air or condensation will occur in the heat exchanger. If the same heat exchanger element is to be utilized for heating'which is more and more usual in present practicethe quantity of heating medium must be considerably less than the cooling medium if excess capacity is to be avoided, or alternatively the temperature of the heating medium in relation to that of the ventilating air must be limited. Both these alternatives involve a complication of the system and, in addition, have the disadvantage of a divergence from the ideal value (quantity or temperature of medium) and a substantial eviation from the desired capacity. It is an object of the present invention to eliminate these difiiculties and disadvantages by means of a construction in which the surface utilized for heat exchanging is reduced on changeover from cooling to heating.
  • the invention is characterized by the arrangement that the heat exchangers of the room units are equipped with a change-over valve, by means of which the cooling or heating medium can be caused to fiowthrough a part of or through the whole heat exchanger.
  • the change-over valve according to a suitable embodiment is constructed to cause the medium to flow through a part of the heat exchanger only, when medium at a temperature approximately equal to one temperature level is circulated, and through the heat exchanger as a whole, when medium at a temperature approximatelyequal to the other temperature level is caused to circulate through theheat exchanger.
  • FIG. 1 is a schematic view of a fluid heat exchange tube system embodying the invention
  • FIG. 2 is an enlarged view, partly in section, of a bypass tube controlling valve shown in FIG. 1.
  • 1 designates the inlet and 2 the outlet of a tubular element 3 arranged in serpentine coils.
  • this is constructed as an element in which the serpentine part is in the form of a number of coils arranged beside each other.
  • 4 designates a three-way valve fitted in one of the coils and connected to the other part of the element by means of a by-pass line 5.
  • the valve When the valve is set for straight through flow, the medium passes through the whole element, whilst the second position of the valve causes it to pass from the first coil of the element via the by-pass line to the last'coil of the element, i.e. to flow through only a small part of the element.
  • the three-way valve is automatic and is fitted with an actuating motor 6 which is controlled by a temperature sensing element 7 inserted in the inlet of the element;
  • a space heat exchange unit comprising a heat exchange fluid conducting tube having an inlet end, and outlet end, and an extended loop length'in series between the inlet and outlet ends and having adjacent passes near the inlet and outlet ends, a by-pass tube arranged between said adjacent passes and communieating therewith in a position to short out a certain portion or" the total heat exchange tube length and leave in a shortened length of the heat exchange tube, a three-way by-pass valve located at the junction of said by-pass tube and one of said passes, said by-pass valve being formed and arranged to open the full length of the heat exchange tube to the flow of heat exchange fluid therethrough and fully close said by-passttube, when a cooling medium is supplied to the heat exchange unit, or to fully close said certain portion of the heat exchange tube and open said by pass tube for the flow of heat exchange fiuid therethrough and through said shortened length of heat exchange tube, when a heating medium is supplied to the heat exchange unit, and means located at the inlet end of'said tube and responsive to the temperature of the

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Central Air Conditioning (AREA)
  • Greenhouses (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

Jan. 19, 1965 A. BOYSEN ETAL 3,166,121
SPACE HEAT EXCHANGE UNIT Filed Feb. 8, 1962 FIG. 2.
INVENTORS.
ARN; BOYSEN BIBGER LARKFELDT GOSTA STEINHOLTZ BY 2 /J ATTYS.
United States Patent 7" 3,166,121 SPACE HEAT EXCHANGE UNIT Arne Boy sen, Lidingo, and i irger Liirirteidt and Steinhoitz, .loniroping, Sweden, assignors to Ahtiehoiaget Svensira Flaaafahrihen, Stochhoim, Sweden Fiied Feb. 8, 1962, Ser. No. 171,93tl 1 Claim. (Cl. 165-35) The present invention relates to a space heat exchange unit designed to cool or heat the ventilating air and connected to a common ventilating system.
With room units designed to cool the ventilating air, the heat exchanging surface for a given cooling load must be large, as the temperature of the cooling medium cannot be substantially lower than the temperature of the ventilating air or condensation will occur in the heat exchanger. If the same heat exchanger element is to be utilized for heating'which is more and more usual in present practicethe quantity of heating medium must be considerably less than the cooling medium if excess capacity is to be avoided, or alternatively the temperature of the heating medium in relation to that of the ventilating air must be limited. Both these alternatives involve a complication of the system and, in addition, have the disadvantage of a divergence from the ideal value (quantity or temperature of medium) and a substantial eviation from the desired capacity. It is an object of the present invention to eliminate these difiiculties and disadvantages by means of a construction in which the surface utilized for heat exchanging is reduced on changeover from cooling to heating.
The invention is characterized by the arrangement that the heat exchangers of the room units are equipped with a change-over valve, by means of which the cooling or heating medium can be caused to fiowthrough a part of or through the whole heat exchanger. In cases where the heat exchanger according to the invention is designed to be connected to a system in which media with two difierent temperature levels is caused to circulate alternately, the change-over valve according to a suitable embodiment is constructed to cause the medium to flow through a part of the heat exchanger only, when medium at a temperature approximately equal to one temperature level is circulated, and through the heat exchanger as a whole, when medium at a temperature approximatelyequal to the other temperature level is caused to circulate through theheat exchanger.
The invention will now be described more in detail with reference to the accompanying drawing in which:
FIG. 1 is a schematic view of a fluid heat exchange tube system embodying the invention;
FIG. 2 is an enlarged view, partly in section, of a bypass tube controlling valve shown in FIG. 1.
In the drawing, 1 designates the inlet and 2 the outlet of a tubular element 3 arranged in serpentine coils. In the case shown, this is constructed as an element in which the serpentine part is in the form of a number of coils arranged beside each other. 4 designates a three-way valve fitted in one of the coils and connected to the other part of the element by means of a by-pass line 5. When the valve is set for straight through flow, the medium passes through the whole element, whilst the second position of the valve causes it to pass from the first coil of the element via the by-pass line to the last'coil of the element, i.e. to flow through only a small part of the element. In the case shown, the three-way valve is automatic and is fitted with an actuating motor 6 which is controlled by a temperature sensing element 7 inserted in the inlet of the element;
vWhat we claim is:
A space heat exchange unit comprising a heat exchange fluid conducting tube having an inlet end, and outlet end, and an extended loop length'in series between the inlet and outlet ends and having adjacent passes near the inlet and outlet ends, a by-pass tube arranged between said adjacent passes and communieating therewith in a position to short out a certain portion or" the total heat exchange tube length and leave in a shortened length of the heat exchange tube, a three-way by-pass valve located at the junction of said by-pass tube and one of said passes, said by-pass valve being formed and arranged to open the full length of the heat exchange tube to the flow of heat exchange fluid therethrough and fully close said by-passttube, when a cooling medium is supplied to the heat exchange unit, or to fully close said certain portion of the heat exchange tube and open said by pass tube for the flow of heat exchange fiuid therethrough and through said shortened length of heat exchange tube, when a heating medium is supplied to the heat exchange unit, and means located at the inlet end of'said tube and responsive to the temperature of the heat exchange fluid at said inlet end for controlling the two positions of said .by-pass .valve.
References Cited by the Examiner UNITED STATES PATENTS 2,337,789 12/43 Whitney 16540 2,357,706 9/44 Toepperwein 165-40 2,739,792
CHARLES SUKALO, Primary Examiner.
PERCY L. PATRICK, Examiner.
3/56 Blum V l-22
US171930A 1961-01-27 1962-02-08 Space heat exchange unit Expired - Lifetime US3166121A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL121460D NL121460C (en) 1961-01-27
DEA39426A DE1231871B (en) 1961-01-27 1962-01-23 Method and device for ventilation of rooms
GB2695/62A GB998025A (en) 1961-01-27 1962-01-24 Ventilating plant with room heating or cooling units
CH99362A CH378495A (en) 1961-01-27 1962-01-26 Air heating or cooling installation
FR886051A FR1312802A (en) 1961-01-27 1962-01-26 Ventilation system comprising individual devices in each room
US171930A US3166121A (en) 1961-01-27 1962-02-08 Space heat exchange unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE81961 1961-01-27
US171930A US3166121A (en) 1961-01-27 1962-02-08 Space heat exchange unit

Publications (1)

Publication Number Publication Date
US3166121A true US3166121A (en) 1965-01-19

Family

ID=26654185

Family Applications (1)

Application Number Title Priority Date Filing Date
US171930A Expired - Lifetime US3166121A (en) 1961-01-27 1962-02-08 Space heat exchange unit

Country Status (6)

Country Link
US (1) US3166121A (en)
CH (1) CH378495A (en)
DE (1) DE1231871B (en)
FR (1) FR1312802A (en)
GB (1) GB998025A (en)
NL (1) NL121460C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255818A (en) * 1964-03-09 1966-06-14 Gen Motors Corp Involute plate heat exchanger
US4830275A (en) * 1987-08-22 1989-05-16 Rli Byggdata Ab Temperature control of buildings
US11501279B2 (en) 2014-09-26 2022-11-15 Block, Inc. Appointment and payment handling

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5212965A (en) * 1991-09-23 1993-05-25 Chander Datta Evaporator with integral liquid sub-cooling and refrigeration system therefor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2337789A (en) * 1941-06-07 1943-12-28 Westinghouse Air Brake Co Cooling device
US2357706A (en) * 1942-06-29 1944-09-05 Rca Corp Heating and cooling system
US2739792A (en) * 1952-11-18 1956-03-27 York Corp Air conditioning systems using heat exchangers local to the conditioned space

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB284965A (en) * 1927-10-14 1928-02-09 Carrier Engineering Co Ltd Improvements in and relating to the ventilation of enclosures
US2581744A (en) * 1949-06-02 1952-01-08 William G Zimmerman Heating and cooling air conditioning system
GB843880A (en) * 1957-05-02 1960-08-10 Carrier Engineering Co Ltd Improvements in or relating to air-conditioning systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2337789A (en) * 1941-06-07 1943-12-28 Westinghouse Air Brake Co Cooling device
US2357706A (en) * 1942-06-29 1944-09-05 Rca Corp Heating and cooling system
US2739792A (en) * 1952-11-18 1956-03-27 York Corp Air conditioning systems using heat exchangers local to the conditioned space

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255818A (en) * 1964-03-09 1966-06-14 Gen Motors Corp Involute plate heat exchanger
US4830275A (en) * 1987-08-22 1989-05-16 Rli Byggdata Ab Temperature control of buildings
US11501279B2 (en) 2014-09-26 2022-11-15 Block, Inc. Appointment and payment handling

Also Published As

Publication number Publication date
CH378495A (en) 1964-06-15
NL121460C (en)
GB998025A (en) 1965-07-14
DE1231871B (en) 1967-01-05
FR1312802A (en) 1962-12-21

Similar Documents

Publication Publication Date Title
US3425485A (en) Air conditioning unit and pump for single pipe system
US3384155A (en) Air conditioning system
US4187687A (en) System for utilizing solar energy and ambient air in air conditioners during the heating mode
US4314547A (en) Solar hot water system with sub-loop hydronic heating
US3166121A (en) Space heat exchange unit
JPS5837455A (en) Cooling device
US3166120A (en) Heating or cooling system for heat exchangers
US3201045A (en) Combined space heating and domestic hot water heating system
USRE22685E (en) Valve arrangement
US3627033A (en) Air heaters with enclosing dampers for protection against freezing
US3544005A (en) Hot water circulation heating system
US2344555A (en) Heating and cooling system
US4090492A (en) Forced air furnace with liquid heat exchanger
GB1479837A (en) Heat exchanger and heating installations incorporating such an exchanger
CN110726268A (en) Outdoor system, heat pump system, and method for controlling heat pump system
US3406744A (en) Heating and air-conditioning apparatus
US3472313A (en) Central heating and cooling system
JPS5858572B2 (en) Air conditioning/heating water heater
US4106308A (en) Heating and cooling system with capillary control means
US3354945A (en) Tube heat exchanger with anti-freeze thermostat
CN209605249U (en) Heating and hot water installations and heating and hot water systems
CN208382572U (en) Phase-change thermal storage type water heater
GB2143624A (en) Central heating systems
US4147206A (en) Semi-active temperature control for heat pipe heat recovery units
JPH02219940A (en) Cooling or heating device