GB1418828A - Heating and or cooling apparatus - Google Patents

Heating and or cooling apparatus

Info

Publication number
GB1418828A
GB1418828A GB810573A GB810573A GB1418828A GB 1418828 A GB1418828 A GB 1418828A GB 810573 A GB810573 A GB 810573A GB 810573 A GB810573 A GB 810573A GB 1418828 A GB1418828 A GB 1418828A
Authority
GB
United Kingdom
Prior art keywords
air
temperature
bridge
transistor
heating
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
Application number
GB810573A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to GB810573A priority Critical patent/GB1418828A/en
Publication of GB1418828A publication Critical patent/GB1418828A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
    • F24D5/02—Hot-air central heating systems; Exhaust gas central heating systems operating with discharge of hot air into the space or area to be heated
    • 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
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2066—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using controlling means acting on the pressure source
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • 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
    • F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air systems
    • F24F2003/0446—Systems in which all treatment is given in the central station, i.e. all-air systems with a single air duct for transporting treated air from the central station to the rooms
    • 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

Abstract

1418828 Ventilating and heating or cooling buildings; air heating stoves MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 19 Feb 1973 8105/73 Headings F4V and F4S [Also in Divisions G1 and G3] In a central heating or cooling apparatus for supplying warmed or cooled air to a plurality of rooms A, B, C, D (Fig. 1), via respective ducts 4a to 4d using a heat exchanger (11), Fig. 10 (not shown), and blower fan (18), the temperature and volume flow rate or pressure of air in a main duct 2 are sensed and maintained constant by control of the fan speed and fuel supply to a burner, for example, when heating. Thus if a louvre 5a is closed to stop warm air supply to room A the resulting tendency for the temperature of the other rooms to rise is prevented by reducing the total flow rate and temperature of air in duct 2. Control circuit, Fig. 11.-The air flow rate in duct 2 is sensed by a pressure transducer (Figs. 6, 7, 8) comprising a diaphragm acting upon a pair of resistance strain gauges 57, 58, one of which is in tension while the other is in compression. When the load is zero both gauges have the same resistance. The gauges 57, 58 are connected in a bridge together with R70, diode 69, R71, R72. A transistor 73 senses the bridge unbalance, charging a capacitor 74 accordingly, the charging time of C74 varying inversely with the deviation in detected pressure from required pressure pre-set on R70. When C74 is sufficiently charged a UJ transistor 76 fires and triggers an SCR 66 connected in the diagonal of a diode switching bridge. The fan motor 18 is energized accordingly. The smaller the deviation, the greater the charging time of C74 and the greater the firing angle of the SCR and hence the lower the fan motor speed. The duct temperature is sensed by a P.T.O. thermistor 27 and desired temperature is pre-set on R87 both connected in a bridge with resistors 84, 85, 86. The bridge unbalance controls a transistor 88 which in turn controls a transistor 82 in series with a coil 83 of an electromagnetic valve of the burner fuel supply. Alternatively, the heat source may be an electric heater (Fig. 12, not shown).
GB810573A 1973-02-19 1973-02-19 Heating and or cooling apparatus Expired GB1418828A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB810573A GB1418828A (en) 1973-02-19 1973-02-19 Heating and or cooling apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB810573A GB1418828A (en) 1973-02-19 1973-02-19 Heating and or cooling apparatus

Publications (1)

Publication Number Publication Date
GB1418828A true GB1418828A (en) 1975-12-24

Family

ID=9845863

Family Applications (1)

Application Number Title Priority Date Filing Date
GB810573A Expired GB1418828A (en) 1973-02-19 1973-02-19 Heating and or cooling apparatus

Country Status (1)

Country Link
GB (1) GB1418828A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061347A2 (en) * 1981-03-24 1982-09-29 Exxon Research And Engineering Company Method and apparatus for regulating fluid flows in parallel-connected conduits e.g., in furnace installations having air pre-heaters and by-pass conduits
EP0173770A1 (en) * 1984-09-05 1986-03-12 Furigas Electronics N.V. Room thermostat for a gas-fired central heating system
GB2251681A (en) * 1991-01-12 1992-07-15 Prestige Aire 2001 Ltd Controlling a ventilator fan speed and heater output

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061347A2 (en) * 1981-03-24 1982-09-29 Exxon Research And Engineering Company Method and apparatus for regulating fluid flows in parallel-connected conduits e.g., in furnace installations having air pre-heaters and by-pass conduits
EP0061347A3 (en) * 1981-03-24 1983-11-16 Exxon Research And Engineering Company Method and apparatus for regulating fluid flows in parallel-connected conduits e.g., in furnace installations having air pre-heaters and by-pass conduits
EP0173770A1 (en) * 1984-09-05 1986-03-12 Furigas Electronics N.V. Room thermostat for a gas-fired central heating system
GB2251681A (en) * 1991-01-12 1992-07-15 Prestige Aire 2001 Ltd Controlling a ventilator fan speed and heater output
GB2251681B (en) * 1991-01-12 1994-07-27 Prestige Aire 2001 Ltd A ventilator unit

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19930217