Please select the most similar patent number from A, B, C and D. Which number is?
Provided is a fan heater comprising a housing (1), an air inlet (2) and air outlet (3) arranged on the two ends of the housing (1), and a blowing assembly (4) and heating assembly (5) arranged inside the housing (1); the heating assembly (5) is arranged at the blower vent position of the blowing assembly (4); the position of the air outlet (3) corresponds to the position of the blower vent; the position of the air outlet (3) on the housing (1) is provided with a flow-guiding plate (6) for directing the warm air delivered by the air outlet (3) in at least two directions.
A: An air conditioner with a multidirectional air outlet function, comprising a housing (1) as well as a first centrifugal impeller (2) and a second centrifugal impeller (3) provided within the housing (1) and adjacent to each other. Air outlets (21, 22, 23, 24, 31, 32, 33, 34) are provided on the upper, lower, left, and right sides of the first centrifugal impeller (2) and the second centrifugal impeller (3) in the radial direction, and a central air outlet (4) is provided on the housing (1) between the first centrifugal impeller (2) and the second centrifugal impeller (3) and along the tangential direction of each of the two impellers. The structure expands the positions of air outlets, and enlarges the range of air outlet, thereby satisfying the requirements of a wide air supply range and effectively improving the comfortableness of air supply. Also disclosed is an air outlet control method of the air conditioner with a multidirectional air outlet function.
B: An all-around adjustable unit heater, comprising a housing (1). An air inlet chamber (2) is disposed in the housing (1), the bottom of the housing (1) is provided with an air inlet (31) in communication with the air inlet chamber (2), and a plurality of air outlets (32) are disposed on side walls of the air inlet chamber (2) in an annular configuration. A blocking piece assembly (4) is disposed on the housing (1). The blocking piece assembly (4) comprises a plurality of blocking pieces (41) respectively matching the plurality of air outlets (32) to control the opening and closing thereof, and an adjusting mechanism (42) cooperating with the blockings (41) for horizontally or longitudinally or aslant opening the air outlets (32). The plurality of air outlets (32) are all further provided with air outlet assemblies (5) thereon, and the air outlet assemblies (5) are located outside the housing (1). A heater (7) is disposed in the air inlet chamber (2) or in each air outlet assembly (5), and a fan (8) is disposed in an air inlet end of the air inlet chamber (2) or in each air outlet assembly (5). The all-around adjustable unit heater is simple in overall structure, and has the function of adjusting the opening and closing of the air outlets (32), thereby solving the problem in a conventional unit heater of being unable to implement all-around air supply for heating.
C: Disclosed is a wall-mounted type indoor unit for an air conditioner, comprising: an enclosure (10), having an air inlet (11) and an air outlet (12) extending transversely along the enclosure, an air deflector (13) being disposed at the air outlet (12) for adjusting the opening state and/or the air outlet direction of the air outlet (12); and two separate cross-flow fans (21, 22) arranged transversely in the enclosure (10) side by side; each of the cross-flow fans (21, 22) is configured to be controlled to rotate around its own rotating shaft; the rotating shafts of two cross-flow fans (21, 22) obliquely extending forwards from two transverse ends of the enclosure to the middle of the enclosure respectively such that projections of the rotating shafts of two cross-flow fans (21, 22) in a horizontal plane form a forward gradually-inclined V shape from two transverse ends of the enclosure to the middle and the air outlet direction of each of the cross-flow fans (21, 22) faces towards the front underside of the transverse outer side of the enclosure, thereby making a breakthrough on the limitation of the common arrangement mode of the cross-flow fan to the air supply angle in the prior art, expanding the air supply range of the indoor unit and implementing double-region air supplying in multiple modes.
D: Disclosed is a wall-mounted air conditioner indoor unit (1), comprising: a housing (10) having an air inlet (11) and an air outlet (12) extending transversely along the housing (10), wherein two separate air guide plates (131, 132) are provided at the air outlet (12) arranged side by side along a transverse direction, each of the air guide plates (131, 132) is configured to pivot about its own axis of rotation parallel to the extending direction of the air outlet (12) in a controlled manner, and the axes of rotation of the two air guide plates (131, 132) are collinear or in parallel; and two separate cross flow fans (21, 22) provided side by side along the transverse direction in the housing (10), wherein each of the cross flow fans (21, 22) is configured to rotate about its own axis of rotation in a controlled manner, and the axes of rotation of the two cross flow fans (21, 22) extend obliquely and frontwards from two transverse ends of the housing (10) towards the middle of the housing (10) respectively, such that the projections of the axes of rotation of the two air guide plates (21, 22) within a horizontal plane form an inverse-V shape gradually inclined frontwards from the two transverse ends of the housing (10) toward the middle of the housing (10). A two-zone air supply of various manner combinations is realized, thus breaking through the limitation of the general arrangement mode of the cross flow fans (21, 22) to the air supply angle thereof, and expanding the air supply range of the indoor unit (1).
Answer: B