FR2410497A1 - Air conditioner filter with clogging warning device - has whistle downstream of constant resistance auxiliary filter sounding when main filter resistance increases whistle air supply - Google Patents

Air conditioner filter with clogging warning device - has whistle downstream of constant resistance auxiliary filter sounding when main filter resistance increases whistle air supply

Info

Publication number
FR2410497A1
FR2410497A1 FR7736408A FR7736408A FR2410497A1 FR 2410497 A1 FR2410497 A1 FR 2410497A1 FR 7736408 A FR7736408 A FR 7736408A FR 7736408 A FR7736408 A FR 7736408A FR 2410497 A1 FR2410497 A1 FR 2410497A1
Authority
FR
France
Prior art keywords
whistle
filter
auxiliary filter
air
resistance
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.)
Withdrawn
Application number
FR7736408A
Other languages
French (fr)
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.)
RECH VENTILAT AERAULI ET
Original Assignee
RECH VENTILAT AERAULI ET
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 RECH VENTILAT AERAULI ET filed Critical RECH VENTILAT AERAULI ET
Priority to FR7736408A priority Critical patent/FR2410497A1/en
Publication of FR2410497A1 publication Critical patent/FR2410497A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0086—Filter condition indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
    • F02M35/09—Clogging indicators ; Diagnosis or testing of air cleaners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/50—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for air conditioning

Abstract

The auxiliary filter admits air to a chamber to which the whistle is connected. The air flow resistance of the whistle is considerably higher, pref. 10X higher, than that of the auxiliary filter, and the whistle only operates when a predetermined air speed through it is reached. A flute mouth-piece is suitable as the whistle. The auxiliary filter is pref. a portion of the main filter. As the flow through the auxiliary filter is initially very much smaller than that through the main filter, through the difference in resistances, very little clogging of the auxiliary filter occurs in use; its resistance remains substantially constant. When the main filter resistance rises due to clogging, the resultant pressure drop increases the flow through the auxiliary filter and the whistle until the speed is sufficient to sound the whistle. The device is used with filters in air conditioning plant in which heat recovery is practised. The exhaust air is cleaned before passage, through heat exchanges, which would otherwise become clogged. The filters need regular replacement and the simplicity of the warning device makes it use on all filters in the plant economic.
FR7736408A 1977-12-02 1977-12-02 Air conditioner filter with clogging warning device - has whistle downstream of constant resistance auxiliary filter sounding when main filter resistance increases whistle air supply Withdrawn FR2410497A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7736408A FR2410497A1 (en) 1977-12-02 1977-12-02 Air conditioner filter with clogging warning device - has whistle downstream of constant resistance auxiliary filter sounding when main filter resistance increases whistle air supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7736408A FR2410497A1 (en) 1977-12-02 1977-12-02 Air conditioner filter with clogging warning device - has whistle downstream of constant resistance auxiliary filter sounding when main filter resistance increases whistle air supply

Publications (1)

Publication Number Publication Date
FR2410497A1 true FR2410497A1 (en) 1979-06-29

Family

ID=9198394

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7736408A Withdrawn FR2410497A1 (en) 1977-12-02 1977-12-02 Air conditioner filter with clogging warning device - has whistle downstream of constant resistance auxiliary filter sounding when main filter resistance increases whistle air supply

Country Status (1)

Country Link
FR (1) FR2410497A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4515609A (en) * 1983-09-14 1985-05-07 Donaldson Company, Inc. Fluid cleaner device
WO1988001050A1 (en) * 1986-08-05 1988-02-11 Filter Alert Corporation Flow rate threshold sensor
FR2640030A1 (en) * 1988-12-07 1990-06-08 Branchu Yves Filtering vent intended for construction parts or construction elements of buildings, premises or compartments, inhabited or non-inhabited
US5352255A (en) * 1993-04-05 1994-10-04 Taft Andrew A Noise maker for air filter
RU225811U1 (en) * 2023-12-29 2024-05-07 Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева" (СибГУ им. М.Ф. Решетнева) Air filter clogged indicator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4515609A (en) * 1983-09-14 1985-05-07 Donaldson Company, Inc. Fluid cleaner device
WO1988001050A1 (en) * 1986-08-05 1988-02-11 Filter Alert Corporation Flow rate threshold sensor
US4747364A (en) * 1986-08-05 1988-05-31 Filter Alert Corporation Flow rate threshold sensor
FR2640030A1 (en) * 1988-12-07 1990-06-08 Branchu Yves Filtering vent intended for construction parts or construction elements of buildings, premises or compartments, inhabited or non-inhabited
US5352255A (en) * 1993-04-05 1994-10-04 Taft Andrew A Noise maker for air filter
RU225811U1 (en) * 2023-12-29 2024-05-07 Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева" (СибГУ им. М.Ф. Решетнева) Air filter clogged indicator

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Legal Events

Date Code Title Description
ST Notification of lapse