A heating unit for a vehicle features a radial fan (100) having a housing (110), which housing has an air inlet (116) and an air exit opening (118). The heating unit has an air-directing device (140) that guides an air flow in a pressure chamber (115) of the housing (110) to the exit opening (118).
A heating unit for a vehicle features a radial fan (100) having a housing (110), which housing has an air inlet (116) and an air exit opening (118). The heating unit has an air-directing device (140) that guides an air flow in a pressure chamber (115) of the housing (110) to the exit opening (118). Arranged in the housing (110) is a radial fan wheel (130) that serves to generate a flow from the air inlet (116) via the pressure chamber (115) to the air exit opening (118). Also provided is an electrical heating element, e.g. a PTC (Positive Temperature Coefficient) heating element (125), that serves to transfer heat to the air flow generated by the fan. Air-directing elements (632, 634, 636, 638) are provided between the exit opening (118) and the heating element (125), in order to generate an air flow having a more uniform (680) velocity distribution.
대표청구항▼
What is claimed is: 1. A heating unit adapted for use in a vehicle, which heating unit comprises: a radial fan (100) having a fan housing (110), said housing defining a pressure chamber with an air inlet (116) and an air exit opening (118); an air-directing device (140) that guides an air flow, wit
What is claimed is: 1. A heating unit adapted for use in a vehicle, which heating unit comprises: a radial fan (100) having a fan housing (110), said housing defining a pressure chamber with an air inlet (116) and an air exit opening (118); an air-directing device (140) that guides an air flow, within the pressure chamber (115) of the fan housing (110), to the air exit opening (118), said air-directing device including an external, approximately spiral-shaped wall (109) forming part of a spiral housing (140) and extending as far as an air exit opening (118), the air (137) delivered by the radial fan wheel (130) during operation having, at the air exit opening (118) and near the spiral-shaped wall (109) in a zone (510) of higher velocity, a higher velocity than in zones (520, 530) of lower velocity that are located farther away from the spiral-shaped wall (109); a radial fan wheel (130) arranged in the fan housing (110), for generating an air flow from the air inlet (116) via the pressure chamber (115) to the air exit opening (118); an electrical heating element (125) arranged adjacent the air exit opening (118) and serving to transfer heat to the air flow generated by the radial fan (100); and wherein there is provided, between the air exit opening (118) of the spiral housing (140) and the heating element (125), a connecting part (620) in which air-directing elements are provided for generating a predetermined flow profile of the air flow (610), which air-directing elements are configured to deflect air that emerges from the spiral housing (140) in a zone (510) thereof having a relatively higher air velocity, in order to achieve a more uniform velocity distribution in the region of the heating element (125). 2. The heating unit according to claim 1, wherein the electrical heating element (125; 160) comprises, at least in part, a heating wire. 3. The heating unit according to claim 1, wherein the electrical heating element (160) comprises at least one PTC (Positive Temperature Coefficient) resistor (310). 4. The heating unit according to claim 1, wherein the electrical heating element (125, 160) defines at least one air passage opening (325) into which extends a heat dissipation element (120) that is connected in thermally conductive fashion to the heating element (160). 5. The heating unit according to claim 1, wherein the electrical heating element (125) is honeycomb-shaped. 6. The heating unit according to claim 5, wherein the honeycomb-shaped heating element (125) comprises air chambers (210) through which flow, during operation, an air flow generated by the radial fan (130). 7. The heating unit according to claim 6, wherein the air chambers (210) have, at least in part, a profile that corresponds approximately to the direction of the air flow near the heating element (125). 8. The heating unit according to claim 1, wherein the radial fan (130) is implemented as a miniature fan. 9. The heating unit according to claim 1, wherein at least some of the air-directing elements (1010, 1020) comprise a surface, at least part of which is formed with recesses (1012, 1022) in order to reduce thereon the surface resistance of the air-directing elements (1010, 1020). 10. The heating unit according to claim 1, wherein at least some of the air-directing elements (632, 634, 636, 638, 732, 734, 736) are approximately columnar. 11. The heating unit according to claim 10, wherein at least two columnar air-directing elements (634, 636; 632, 638) are arranged on an imaginary straight line (642; 644) that extends substantially parallel to the air exit opening (118) of the spiral housing (140). 12. The heating unit according to claim 11, wherein two columnar air-directing elements (634, 636; 732, 734) are arranged on a first imaginary straight line (644; 720) that is located adjacent the air exit opening (118) of the spiral housing (140), the totality of these air-directing elements being offset, away from an imaginary position symmetrical with respect to the air exit opening (118), toward the zone (510) of higher velocity. 13. The heating unit according to claim 12, wherein at least one columnar air-directing element (632, 638; 736) is arranged on a second imaginary straight line (642; 710), which latter extends approximately parallel to the first straight line (644; 720) and has a greater spacing from the air exit opening (118) than the first straight line (644; 740), and is arranged there in a region of the zones (520, 530) of lower velocity. 14. The heating unit according to claim 1, wherein at least some of the air-directing elements (832, 834, 836, 932, 934, 936) are generally scoop-shaped. 15. The heating unit according to claim 14, wherein at least some of the scoop-shaped air-directing elements (932, 934, 936) are of approximately a uniform length and are configured in substantially straight fashion. 16. The heating unit according to claim 14, wherein at least some of the scoop-shaped air-directing elements (832, 834, 836) are of different lengths and are arc-shaped. 17. The heating unit according to claim 14, wherein at least some of the scoop-shaped air-directing elements (832, 834, 836; 932, 934, 936) extend approximately as far as an imaginary straight line (840; 850) that extends substantially parallel to the air exit opening (118) of the spiral-shaped housing (140). 18. A heating unit adapted for use in a vehicle, which heating unit comprises: a radial fan (100) having a fan housing (110), said housing defining a pressure chamber with an air inlet (116) and an air exit opening (118); an air-directing device (140) that guides an air flow, within the pressure chamber (115) of the fan housing (110), to the air exit opening (118); a radial fan wheel (130) arranged in the fan housing (110), for generating an air flow from the air inlet (116) via the pressure chamber (115) to the air exit opening (118); and an electrical heating element (125) arranged adjacent the air exit opening (118) and serving to transfer heat to the air flow generated by the radial fan (100), wherein there is provided, between the air exit opening (118) of the spiral housing (140) and the heating element (125), a connecting part (620) in which four approximately columnar air-directing elements (632, 634, 636, 638) are arranged at the corners of an imaginary parallelogram (646) in which two sides extend approximately parallel to the air exit opening (118) of the spiral housing (140). 19. A heating unit adapted for use in a vehicle, which heating unit comprises: a radial fan (100) having a fan housing (110), said housing defining a pressure chamber with an air inlet (116) and an air exit opening (118); an air-directing device (140) that guides an air flow, within the pressure chamber (115) of the fan housing (110), to the air exit opening (118); a radial fan wheel (130) arranged in the fan housing (110), for generating an air flow from the air inlet (116) via the pressure chamber (115) to the air exit opening (118); and an electrical heating element (125) arranged adjacent the air exit opening (118) and serving to transfer heat to the air flow generated by the radial fan (100), wherein there is provided, between the air exit opening (118) of the spiral housing (140) and the heating element (125), a connecting part (620) in which three air-directing elements (732, 734, 736) are provided, of which two air-directing elements (732, 734) are arranged on a first straight line (720) that extends approximately parallel to the air exit opening, and the third air-directing element (736) is arranged between the first straight line (720) and the electrical heating element (125).
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이 특허에 인용된 특허 (14)
Tamada Takanobu,JPX, Air conditioning control apparatus for vehicles.
Van Den Elst Fredrik M. N. (Almelo NLX) Velten Hendrikus (Enter NLX), Vehicular air heater using PTC heater tablets associated with funnel heat exchanges.
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