DK144552B - VACUUM CLEANERS WITH A MOTOR Blower AND A TEMPERATURE CONTROLLED VALVE IN A INFLATION PASSAGE FROM THE ENVIRONMENTS TO THE Blower Blower - Google Patents
VACUUM CLEANERS WITH A MOTOR Blower AND A TEMPERATURE CONTROLLED VALVE IN A INFLATION PASSAGE FROM THE ENVIRONMENTS TO THE Blower Blower Download PDFInfo
- Publication number
- DK144552B DK144552B DK108077AA DK108077A DK144552B DK 144552 B DK144552 B DK 144552B DK 108077A A DK108077A A DK 108077AA DK 108077 A DK108077 A DK 108077A DK 144552 B DK144552 B DK 144552B
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- Prior art keywords
- air
- housing
- blower
- temperature
- opening
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2889—Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/19—Means for monitoring filtering operation
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2805—Parameters or conditions being sensed
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
Description
144552144552
Opfindelsen angår en støvsuger med et hus, som har en indsugningsåbning for støvholdig luft og en udblæsningsåbning for filtreret luft, en i huset anbragt motor-blæserenhed med en lufttilgangsåbning og en 5 luftafgangsåbning, et støvfraskillende filter mellem husets indsugningsåbning og motor-blæserenhedens lufttilgangsåbning, samt en af en temperaturføler styret og normalt lukket ventil, som ved overskridelse af en forud bestemt temperatur åbner for indsugning af luft 10 fra omgivelserne til et sugerum indvendig i huset mellem filteret og motor-blæserenhedens lufttilgangsåbning.BACKGROUND OF THE INVENTION The present invention relates to a vacuum cleaner having a housing having a suction opening for dusty air and an exhaust air outlet for filtered air, an in-house blower unit with an air inlet opening and an air outlet opening, a dust separating filter between the inlet opening and the inlet fan assembly, a temperature sensor controlled and normally closed valve which, by exceeding a predetermined temperature, allows for the suction of air 10 from the surroundings to a suction room inside the housing between the filter and the air fan opening of the motor blower unit.
I en fra svensk patentskrift nr. 381 982 kendt støvsuger af denne art er temperaturføleren placeret 15 i et kammer, der gennemstrømmes af den varme luft fra motor-blæserenhedens afgangsåbning, og føleren styrer via en pneumatisk servomotor åbningen af ventilen. Når filteret ved brugen af støvsugeren fyldes med støv, forstoppes filterets porer gradvis, og modstanden mod 20 luftgennemstrømningen stiger, således at mængdestrøm-men af luft gradvis aftager. Dette fører til en højere motorbelastning og højere motortemperaturer, hvorved også følerens temperatur stiger, idet føleren opvarmes såvel af strålevarme fra motoren som ved kon-25 vektion fra den forbistrømmende, fra blæserens luftafgangsåbning strømmende luft. Når føleren registrerer en temperatur over den forudbestemte værdi, påvirker den servomotoren til åbning af ventilen, således at relativt kold luft fra omgivelserne strømmer direkte 30 ind i sugerummet på filterets nedstrømsside og derfra videre gennem motoren, hvorved dennes temperatur igen aftager. Medens dette kendte ventilarrangement kan beskytte støvsugerens komponenter mod overhedning som følge af gradvis tilstopning af filteret og til-35 svarende langsom stigning af udblæsningsluftens tempe- 2 144552 ratur, er det uegnet som beskyttelse i det tilfælde, at støvsugerens sugeledning utilsigtet bliver blokeret i en sådan grad, at luftgennemstrømningen praktisk taget ophører. Dette skyldes, at der i denne situation 5 heller ikke er nogen luftstrøm gennem det kammer, hvori føleren er anbragt, og dermed heller ingen varmeafgivelse ved konvektion til føleren. Da således den ene af de to varmekilder, hvorpå følerens temperaturstigning beror, er bortfaldet, bliver forsinkelsen af fø-lerens temperaturstigning i forhold til temperaturstigningen af støvsugerens komponenter endnu større end ved normal drift, hvor stigningen beror på gradvis tilstopning af filteret. Føleren kan derfor ikke reagere med den nødvendige hurtighed. i5 Med henblik på at afhjælpe denne ulempe er støvsugeren ifølge opfindelsen ejendommelig ved, at temperaturføleren er anbragt i sugerummet, og at der fra motor-blæserenhedens indre i nærheden af enhedens luftafgangsåbning udgår en snæver kanal, hvis munding 20 er rettet mod temperaturføleren og beliggende i kort afstand fra denne.In a vacuum cleaner of this kind known from Swedish Patent No. 381 982, the temperature sensor is placed 15 in a chamber which is flowed by the hot air from the outlet opening of the motor-blower unit, and the sensor controls the opening of the valve via a pneumatic servomotor. As the filter is filled with dust when the vacuum cleaner is used, the filter's pores are gradually clogged and the resistance to air flow increases, so that the flow of air gradually decreases. This leads to a higher engine load and higher engine temperatures, thereby also increasing the temperature of the sensor as the sensor is heated by both radiant heat from the motor and by convection from the air flowing from the blower air outlet opening. When the sensor detects a temperature above the predetermined value, it affects the servomotor to open the valve so that relatively cold air from the surroundings flows directly into the suction chamber on the downstream side of the filter and from there on through the motor, whereby its temperature again decreases. While this known valve arrangement can protect the vacuum cleaner components from overheating due to gradual clogging of the filter and corresponding slow rise of the exhaust air temperature, it is unsuitable for protection in the event that the vacuum cleaner suction line is inadvertently blocked in such degree that the air flow virtually ceases. This is because in this situation 5 there is also no air flow through the chamber in which the sensor is placed, and thus no heat release upon convection to the sensor. Thus, since one of the two heat sources on which the temperature rise of the sensor is due has lapsed, the delay of the temperature rise of the sensor relative to the temperature rise of the components of the vacuum cleaner becomes even greater than in normal operation, where the increase is due to the gradual clogging of the filter. Therefore, the sensor cannot respond with the required speed. In order to alleviate this disadvantage, the vacuum cleaner according to the invention is characterized in that the temperature sensor is arranged in the suction room and that a narrow duct exits from the interior of the motor blower unit near the air outlet opening of the unit, the mouth 20 of which is directed towards the temperature sensor and located in the a short distance from this one.
Den snævre kanal fra motor-blæserenhedens indre til temperaturføleren bevirker på grund af trykforskellen mellem enhedens indre og det omgivende sugerum, at 25 en lille andel af den opvarmede afgangsluft fra motor-blæserenheden strømmer gennem kanalen direkte mod føleren, således at dennes temperatur praktisk taget uden forsinkelse følger temperaturen af afgangsluften. Da der kun kræves en forholdsvis svag luftstrømning mod 30 føleren, kan kanalen gøres så snæver, at den gennem kanalen tilbagestrømmende luftmængde ikke i mærkbar grad forøger trykket på blæserens sugeside med deraf følgende nedsat sugeevne af støvsugeren under normal drift af støvsugeren. Ved afbrydelse af lufttilstrøm-35 ningen til motor-blæserenheden som følge af en blokering af sugeledningen vil der gennem kanalen stadig 3 U45S2 strømme opvarmet luft mod føleren, som derfor reagerer meget hurtigt på temperaturstigningen ved at åbne ventilen for indstrømning af kold luft til sugerummet, hvorved temperaturen igen aftager. I denne sammenhæng 5 er det også fordelagtigt, at trykforskellen mellem blæserens trykside og sugeside - og dermed styrken af den mod føleren rettede luftstrøm - ved et givet kanaltværsnit er størst, når luftgennemgangen gennem blæseren er praktisk taget nul, dvs. netop i den situa-10 tion, hvor temperaturføleren skal træde i virksomhed for at åbne ventilen.The narrow duct from the motor fan unit interior to the temperature sensor causes, due to the pressure difference between the unit interior and the surrounding suction room, that a small proportion of the heated exhaust air from the motor fan unit flows through the duct directly towards the sensor, so that its temperature is practically without delay follows the temperature of the exhaust air. As only a relatively weak air flow is required against the sensor, the duct can be made so narrow that the flow of air flowing through the duct does not appreciably increase the pressure on the suction side of the fan, with consequent reduced suction capacity of the vacuum cleaner during normal operation of the vacuum cleaner. By interrupting the air flow to the motor blower assembly due to a suction line blockage, through the duct, 3 U45S2 is still flowing heated air toward the sensor, which therefore reacts very rapidly to the temperature rise by opening the cold air flow valve to the suction chamber. whereby the temperature again decreases. In this context 5, it is also advantageous that the pressure difference between the pressure side and the suction side of the fan - and thus the strength of the air flow directed towards the sensor - at a given duct cross section is greatest when the air flow through the fan is practically zero, ie. precisely in the situation where the temperature sensor must act to open the valve.
Det skal bemærkes, at der i det ikke-forpubli-cerede danske fremlæggelsesskrift nr. 138 825 (ansøgning nr. 5370/76) er beskrevet en støvsuger af den 15 indledningsvis angivne art, hvor temperaturføleren er anbragt i sugerummet, som ved hjælp af et tætningsorgan er adskilt fra en udstrømningspassage mellem mo-tor-blæserenhedens luftafgangsåbning og husets udblæsningsåbning. Det har imidlertid vist sig, at føleren 20 også med dette arrangement reagerer forholdsvis langsomt i den førnævnte situation, hvor den normale luftgennemstrømning er ophørt, hvilket hænger sammen med, at føleren i så fald kun opvarmes ved stråling fra sugerummets omgivende vægge, som bestryges af den re-25 lativt kølige indsugningsluft fra filterets nedstrøms-side, og hvis temperatur derfor er tilsvarende lav.It should be noted that the unpublished Danish publication no. 138 825 (application no. 5370/76) discloses a vacuum cleaner of the kind specified in the preamble, where the temperature sensor is arranged in the suction chamber, which by means of a sealing means is separated from an outflow passage between the air outlet opening of the motor blower unit and the outlet outlet of the housing. However, it has been found that the sensor 20 also reacts with this arrangement relatively slowly in the aforementioned situation where the normal air flow has ceased, which is because in that case the sensor is only heated by radiation from the surrounding walls of the suction room which is covered by the relatively cool suction air from the downstream side of the filter, and whose temperature is therefore correspondingly low.
For at sikre tilstrækkelig hurtig åbning for indsugning af kold luft i den nævnte situation må føleren derfor indstilles til at udløse ventilåbningen ved 30 en relativt lav temperatur, som i praksis kan ligge op til 40°C lavere end den temperatur, hvortil føleren kan indstilles i en ifølge opfindelsen udført støvsuger.Therefore, in order to ensure sufficiently rapid opening for the suction of cold air in the said situation, the sensor must be set to release the valve opening at a relatively low temperature, which in practice can be up to 40 ° C lower than the temperature to which the sensor can be set. a vacuum cleaner according to the invention.
En lav udløsningstemperatur medfører, især ved høj omgivelsestemperatur, som f.eks. i troperne, risiko for, 35 at føleren kan åbne ventilen i situationer under normal støvsugerdrift, hvor dette ikke er påkrævet.A low release temperature causes, especially at high ambient temperature, such as e.g. in the tropics, there is a risk that the sensor may open the valve in situations during normal vacuum operation where this is not required.
4 144552 I en konstruktivt enkel udførelsesform er temperaturføleren anbragt over for motor-blæserenhedens ydervæg, og kanalen udgøres af en lille åbning i nævnte ydervæg.In a constructively simple embodiment, the temperature sensor is arranged against the outer wall of the motor blower unit and the duct is constituted by a small opening in said outer wall.
5 Erfaringerne har vist, at der med en diameter af kanalen på mellem 1 og 2 mm kan opnås en tilfredsstillende luftstrøm til opvarmning af føleren uden væsentlig reduktion af trykdifferensen over blæseren.Experience has shown that with a diameter of the duct between 1 and 2 mm a satisfactory air flow can be obtained for heating the sensor without significantly reducing the pressure difference across the fan.
Opfindelsen forklares i det følgende nærmere 10 under henvisning til tegningen, på hvilken fig. 1 er et rent skematisk snit gennem en udførelsesform for støvsugeren ifølge opfindelsen med tilsluttet sugemundstykke, og fig. 2 et lodret snit i større skala gennem 15 støvsugerens topstykke, hvori motor-blæserenheden samt temperaturføleren og den af denne styrede ventil er indbygget.BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in greater detail below with reference to the drawing, in which: FIG. 1 is a schematic sectional view of one embodiment of the vacuum cleaner nozzle of the present invention; and FIG. 2 is a vertical section on a larger scale through the head of the vacuum cleaner, in which the motor fan unit as well as the temperature sensor and the valve controlled by it are incorporated.
Den på tegningen anskueliggjorte støvsuger er af den såkaldte spandetype, hvis hus består af tre let 20 adskillelige dele, nemlig en underbeholder 1, som er beregnet til at opsamle støvet, en beholderoverpart 2 og et topstykke 3. Som antydet i fig. 1 har underbeholderen 1 en studs 4 til optagelse af en støvsugerslange 5, på hvis frie ende et sugemundstykke 25 6 er monteret. Studsen 4 kan være udformet med en i beholderen 1 indadragende del, hvorpå en ikke vist støvpose kan anbringes aftageligt. Et af egnet tekstilstof fremstillet støvfilter 7 er monteret på en holder, som er fastklemt mellem beholderen 1 30 og overparten 2.The vacuum cleaner illustrated in the drawing is of the so-called bucket type, whose housing consists of three easily separable parts, namely a sub-container 1, which is intended to collect the dust, a container upper part 2 and a head piece 3. As indicated in FIG. 1, the sub-container 1 has a stud 4 for receiving a vacuum hose 5, on whose free end a suction nozzle 25 6 is mounted. The plug 4 may be formed with a portion projecting inwardly of the container 1, on which a dust bag not shown can be removably placed. A dust filter 7 made of suitable fabric is mounted on a holder which is clamped between the container 1 30 and the upper part 2.
Støvsugerens motor-blæserenhed er monteret i topstykket 3 og består af en elektromotor 8, hvis statorhus er åbent forneden for indstrømning af filtreret sugeluft, en til motorens udgangsaksel fast-35 gjort blæser omfattende to seriekoblede blæsertrin 9 og 10 og tilhørende stationære ledeapparater 11 og 12. Enhedens blæserdel er omgivet af et tætsluttende 5 144552 hus 13, som forneden er lufttæt forbundet med motoren 8's statorhus, og som foroven har en central luftafgangsåbning 14, se fig. 2.The vacuum cleaner motor fan unit is mounted in the head piece 3 and consists of an electric motor 8, the stator housing of which is open below the inflow of filtered suction air, a fan fixed to the engine output shaft comprising two series coupled fan stages 9 and 10 and associated stationary guiding devices 11 and 12 The fan part of the unit is surrounded by a tightly sealed housing 13, which is air-tightly connected to the stator housing of the engine 8 and which has a central air outlet opening 14 at the top, see fig. 2nd
Åbningen 14 ligger over for og koaksialt 5 med en udblæsningsåbning 15 i en forsænket del 16 af topstykket 3's væg.The aperture 14 faces and coaxially 5 with an exhaust port 15 in a recessed portion 16 of the wall of the headpiece 3.
Den kant af huset 131s topvæg, som omgiver åbningen 14, er ombertlet til centrering af en af elastomert materiale fremstillet tætningsring 17 med 10 U-formet tværsnitsprofil. En hensigtsmæssig udførelsesform for tætningsringen er beskrevet mere detaljeret i dansk fremlæggelsesskrift nr. 137.429. Tætningsringen tilvejebringer tæthed mellem det rum 18, som er afgrænset mellem huset 13's yderside, indersiden af 15 topstykket 3 og ydersiden af tætningsringen 17, og den centrale luftudstrømningspassage 19, som ved hjælp af tætningsringen 17's inderside afgrænses mellem åbningerne 14 og 15.The edge of the top wall of the housing 131 surrounding the opening 14 is recessed to center a sealing ring 17 made of elastomeric material with 10 U-shaped cross sectional profile. An appropriate embodiment of the sealing ring is described in more detail in Danish Patent Specification No. 137,429. The sealing ring provides tightness between the space 18 delimited between the outside of the housing 13, the inside of the cap 3 and the outside of the sealing ring 17, and the central air outlet passage 19 which is delimited by the sealing ring 17 between the openings 14 and 15.
Som nærmere beskrevet i fremlæggelsesskrift 20 nr. 137.429 er der indvendig i støvsugerens hus en i alt væsentligt uhindret strømningspassage mellem det nævnte rum 18 og nedstrømssiden af filteret 7, således at der ved støvsugerens normale drift tilvejebringes et strømningsmønster indvendig i huset, såle-25 des som det er vist med pile i fig. 1. Fra mundstykket 6 strømmer den støvholdige luft gennem slangen 5, som vist med pilene 20, ind i støvbeholderen 1, hvor luften i givet fald passerer gennem den ovenfor omtalte, ikke viste støvpose, inden den som vist med pile-30 ne 21 strømmer gennem filteret 7. En del af den filtrerede luft strømmer op i rummet 18 mod indersiden af topstykket 3, som vist med pilene 22 til venstre i fig. 1. Den relativt kolde luft vender derefter og bevæger sig nedad som vist med pilene 23, 35 hvorved der skabes turbulens i rummet 18, og dette 6 144552 sikrer en effektiv køling af topstykket 3's udad-vendende vægflader, idet den cirkulerende kolde luft opvarmes, inden den sammen med den resterende del af luftmængden fortsætter ind gennem motor-blæserenheden 5 som vist med pilene 24. Pilene 25 foroven i fig. 1 angiver udstrømningen af den opvarmede luft gennem den korte og relativt snævre udstrømningspassage 19 og udblæsningsåbningen 15.As described in specification 20 to 137,429, a substantially unobstructed flow passage between said space 18 and the downstream side of the filter 7 is provided inside the vacuum cleaner housing, so that, in the normal operation of the vacuum cleaner, a flow pattern is provided inside the housing. as shown by arrows in FIG. 1. From the nozzle 6, the dusty air flows through the hose 5, as shown by the arrows 20, into the dust container 1, where the air passes through the dust bag (not shown), as indicated above, before flowing as shown by the arrows 21. through the filter 7. A portion of the filtered air flows up into the space 18 towards the inside of the headpiece 3, as shown by the arrows 22 on the left in FIG. The relatively cold air then turns and moves downwardly as indicated by arrows 23, 35 thereby creating turbulence in the space 18, and this ensures efficient cooling of the outward wall surfaces of the headpiece 3 as the circulating cold air is heated. before continuing in conjunction with the remainder of the airflow through the motor fan assembly 5 as shown by arrows 24. The arrows 25 at the top of FIG. 1 indicates the outflow of the heated air through the short and relatively narrow outflow passage 19 and the outlet opening 15.
I den kølede del af topstykkets væg uden for 10 det forsænkede vægafsnit 16 er der, se fig. 2, monteret en generelt med 26 betegnet ventil, som under normal drift af støvsugeren er lukket. Ventilen 26, der kan være udformet som beskrevet i det førnævnte fremlæggelsesskrift nr. 138.825, består af 15 et i topstykket 3 udformet ventilstyr 27 og et dermed samvirkende ventillegeme 28 ud i ét med en nedadvendende, hul og tyndvægget stamme 29, hvori der findes et smelteligt materiale, som er fast ved drifttemperatur, men smelter ved en forud bestemt 20 højere temperatur.In the cooled part of the wall of the cylinder outside the recessed wall section 16 there is, see fig. 2, a valve generally designated 26, which is closed during normal operation of the vacuum cleaner. The valve 26, which may be configured as described in the aforementioned specification specification 138,825, consists of a valve guide 27 formed in the head piece 3 and a cooperating valve body 28 integrally with a downwardly extending, hollow and thin-walled stem 29, which contains a meltable material which is solid at operating temperature but melts at a predetermined higher temperature.
To forholdsvis stive, men dog deformerbare ribber 31 er udformet på ventilstyret 27 på hver sin side af ventilstammen 29. Stammen har på sin udadvendende overflade to savtakformede fremspring 25 32 med en forholdsvis flad overside og væsentlig stejlere underside. Når ventilen er lukket som vist i fig. 2, ligger oversiden af fremspringene 32 mod undersiden af ribberne 31, som derved fastholder ventillegemet 28 på grund af det størknede materiale 30 30's usammentrykkelighed.Two relatively rigid, yet deformable ribs 31 are formed on the valve guide 27 on each side of the valve stem 29. The stem has on its outward surface two saw-shaped projections 25 32 with a relatively flat upper side and substantially steeper underside. When the valve is closed as shown in FIG. 2, the upper side of the projections 32 lies against the underside of the ribs 31, thereby retaining the valve body 28 due to the incompressibility of the solidified material 30 30.
I det øjeblik da materialet 30 smelter, kan den relativt tynde væg af ventilstammen 29 og det smeltede materiale sammentrykkes under indvirkning af en fjeder 33, som belaster ventilstammen og 35 dermed ventillegemet 28 med en opadgående forspæn- 144552 7 ding. Ved den førnævnte forudbestemte temperatur åbner ventilen under indvirkning af fjederkraften, som derefter holder ventilen åben, indtil den lukkes manuelt ved tryk på en betjeningsknap 34, som er 5 fastgjort til oversiden af ventillegemet 28.As the material 30 melts, the relatively thin wall of the valve stem 29 and the molten material can be compressed under the action of a spring 33 which stresses the valve stem and thus the valve body 28 with an upwardly biased tension. At the aforementioned predetermined temperature, the valve opens under the action of the spring force, which then holds the valve open until it is closed manually by pressing a control button 34 which is attached to the upper side of the valve body 28.
Når fremspringene 32 ved ventillegemets løftning er kommet fri af ribberne 31, vil stammen 29 under indflydelse af det smeltede materiale 30's statiske tryk, eventuelt suppleret med ventilstammens 10 egen elasticitet, bevæge sig tilbage til den i fig.When the projections 32 have been released from the ribs 31 by the lifting of the valve body, the stem 29, under the influence of the static pressure of the molten material 30, optionally supplemented with the elasticity of the valve stem 10, will return to the one shown in FIG.
2 viste stilling, således at fremspringene 32 efter materialet 30's størkning er presset ud på plads.2 so that the projections 32 are pressed into place after the solidification of the material 30.
Når ventillegemet 28 herefter trykkes ned ved hjælp af knappen 34, kan fremspringene presse ribberne 15 31 tilbage, indtil de igen låser i den i fig. 2 viste stilling.When the valve body 28 is then depressed by means of the button 34, the projections can push the ribs 31 31 back until they again lock in the position shown in FIG. 2.
I væggen af motor-blæserenhedens hus 13 er der boret et lille hul 35 umiddelbart under den ned-advendende endeflade af ventilstammen 29. Under 20 støvsugerens drift vil der på grund af den af blæseren skabte trykdifferens mellem inder- og ydersiden af huset 13 strømme luft ud gennem hullet 35, og da hullet er placeret i nærheden af det sidste trin af stationære ledeskovle 12, er den udstrømmede lufts 25 temperatur i det væsentlige lig med temperaturen af den gennem udblæsningsåbningen 15 afgående luftmængde. Den nævnte placering af hullet 35 sikrer endvidere en høj trykdifferens til frembringelse af luftstrømmen, som derfor selv med en lille diameter 30 af hullet 35, f.eks. ca. 1,2 mm, er tilstrækkelig til at holde ventilstammen 29 og det i denne indesluttede materiale 30 på en temperatur, som ret nøje følger temperaturen af udblæsningsluften. Derved sikres, at ventilen 26 reagerer med stor præcision 35 og hastighed på en ferlig temperaturstigning af udblæs-A small hole 35 is drilled into the wall of the motor fan unit housing 13 immediately below the downward-facing end face of the valve stem 29. During the operation of the vacuum cleaner, due to the pressure difference created by the fan, air will flow between the interior and exterior of the housing 13. out of the hole 35, and since the hole is located near the last stage of stationary guide vanes 12, the temperature of the outflow of air 25 is substantially equal to the temperature of the air flowing through the exhaust port 15. The said location of the hole 35 furthermore ensures a high pressure difference to produce the air flow, which, therefore, even with a small diameter 30 of the hole 35, e.g. ca. 1.2 mm is sufficient to keep the valve stem 29 and the material 30 contained therein at a temperature which closely follows the temperature of the exhaust air. This ensures that valve 26 responds with great precision 35 and speed to a reasonable temperature rise of blowout.
Claims (2)
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK108077A DK144552C (en) | 1977-03-11 | 1977-03-11 | VACUUM CLEANERS WITH A MOTOR Blower AND A TEMPERATURE-CONTROLLED VALVE IN A INFLATION PASSAGE FROM THE Blower Suction Side Surroundings |
| DE2809153A DE2809153C2 (en) | 1977-03-11 | 1978-03-03 | vacuum cleaner |
| NLAANVRAGE7802554,A NL181708C (en) | 1977-03-11 | 1978-03-08 | VACUUM CLEANER. |
| SE7802699A SE439428B (en) | 1977-03-11 | 1978-03-09 | VACUUM CLEANER |
| IT09365/78A IT1103653B (en) | 1977-03-11 | 1978-03-09 | PERFECTED VACUUM CLEANER |
| GB9402/78A GB1574666A (en) | 1977-03-11 | 1978-03-09 | Vacuum cleaner |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK108077 | 1977-03-11 | ||
| DK108077A DK144552C (en) | 1977-03-11 | 1977-03-11 | VACUUM CLEANERS WITH A MOTOR Blower AND A TEMPERATURE-CONTROLLED VALVE IN A INFLATION PASSAGE FROM THE Blower Suction Side Surroundings |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK108077A DK108077A (en) | 1978-09-12 |
| DK144552B true DK144552B (en) | 1982-03-29 |
| DK144552C DK144552C (en) | 1982-09-20 |
Family
ID=8100777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK108077A DK144552C (en) | 1977-03-11 | 1977-03-11 | VACUUM CLEANERS WITH A MOTOR Blower AND A TEMPERATURE-CONTROLLED VALVE IN A INFLATION PASSAGE FROM THE Blower Suction Side Surroundings |
Country Status (6)
| Country | Link |
|---|---|
| DE (1) | DE2809153C2 (en) |
| DK (1) | DK144552C (en) |
| GB (1) | GB1574666A (en) |
| IT (1) | IT1103653B (en) |
| NL (1) | NL181708C (en) |
| SE (1) | SE439428B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4226575A (en) * | 1979-06-06 | 1980-10-07 | Ametek, Inc. | Wet pick-up vacuum unit |
| DE4237774A1 (en) * | 1991-11-14 | 1993-05-19 | Manfred Runge | Suction turbine esp. for use in vacuum cleaner with essentially cylinder housing - has end plates and rotatable shaft located in housing, turbine wheel fixed to shaft, at least one stationary air vane and at least one suction opening. |
| DE102004040985A1 (en) * | 2004-08-24 | 2006-03-02 | BSH Bosch und Siemens Hausgeräte GmbH | Vacuum cleaner with molded valve housing |
| FR2995545B1 (en) * | 2012-09-19 | 2014-10-03 | Mbh Dev | SUCTION CENTER FOR ROLLING WORK EQUIPMENT AND EQUIPMENT |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE740861C (en) * | 1941-05-28 | 1944-10-02 | Siemens Ag | Vacuum cleaner with a box-shaped housing, preferably made of molded material |
| DE1229672B (en) * | 1958-07-24 | 1966-12-01 | Licentia Gmbh | Safety device for devices with built-in blowers |
| NL274310A (en) * | 1961-02-04 | |||
| DE1945313A1 (en) * | 1969-09-06 | 1971-03-11 | Siemens Elektrogeraete Gmbh | vacuum cleaner |
-
1977
- 1977-03-11 DK DK108077A patent/DK144552C/en not_active IP Right Cessation
-
1978
- 1978-03-03 DE DE2809153A patent/DE2809153C2/en not_active Expired
- 1978-03-08 NL NLAANVRAGE7802554,A patent/NL181708C/en not_active IP Right Cessation
- 1978-03-09 SE SE7802699A patent/SE439428B/en not_active IP Right Cessation
- 1978-03-09 GB GB9402/78A patent/GB1574666A/en not_active Expired
- 1978-03-09 IT IT09365/78A patent/IT1103653B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| SE439428B (en) | 1985-06-17 |
| NL181708B (en) | 1987-05-18 |
| NL181708C (en) | 1987-10-16 |
| GB1574666A (en) | 1980-09-10 |
| DE2809153A1 (en) | 1978-09-14 |
| IT7809365A0 (en) | 1978-03-09 |
| DK108077A (en) | 1978-09-12 |
| DE2809153C2 (en) | 1982-07-01 |
| NL7802554A (en) | 1978-09-13 |
| SE7802699L (en) | 1978-09-12 |
| DK144552C (en) | 1982-09-20 |
| IT1103653B (en) | 1985-10-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |