Volute air path switching structure and centrifugal fan thereof

Abstract

The utility model relates to a volute body wind path switching structure and a centrifugal fan thereof in the technical field of centrifugal fans, the volute body wind path switching structure comprises a volute body and a rotatable impeller arranged in the volute body, one end of the volute body is a first air outlet, one side wall of the volute body is provided with a second air outlet, and the other side wall of the volute body is provided with a second air outlet. A flow channel switching mechanism is arranged on the side, close to the second air outlet, of the volute body, the air supply flow channel can be divided into a first flow channel and a second flow channel through the flow channel switching mechanism, and a connection or disconnection structure can be formed between the first flow channel and the second flow channel through the flow channel switching mechanism. Therefore, the flow direction of the air supply flow channel towards the first air outlet or the second air outlet is changed, the volute body air path has diversified structural states, the centrifugal fan can be located in different functional devices for air blowing, and meanwhile the centrifugal fan with the volute body air path switching structure is compact in structure and convenient to use. The system is suitable for being applied to various household electrical and industrial equipment with function switching.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a volute air path switching structure and a centrifugal fan thereof. Background Art

[0002] Centrifugal fans are based on the principle of converting kinetic energy into potential energy. They use a high-speed rotating impeller to accelerate the gas, then decelerate and change the flow direction, so that the kinetic energy is converted into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, changes to the radial direction when passing through the impeller, and then is discharged to the air outlet along the inner wall of the volute body. It is generally widely used in various fields such as home appliances and industrial equipment.

[0003] The existing centrifugal fans have a single flow direction, and only blow air along the inner wall of the volute body toward the air outlet. In household electrical appliances with function switching, such as hair dryers, the hot and cold states of the blowing can only be switched by changing the working state of the heating part, thereby achieving function switching. Therefore, in view of these current situations, there is an urgent need to develop a volute air path switching structure and a centrifugal fan thereof to meet the needs of actual use. Utility Model Content

[0004] The utility model aims to provide a volute air path switching structure and a centrifugal fan thereof, which are used to solve the defect that the existing centrifugal fan is applied to household electrical appliances with function switching and the air path flow direction of the centrifugal fan is single.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A volute air path switching structure comprises a volute body and a rotatable impeller arranged inside the volute body, one end of the volute body is a first air outlet, the interior of the volute body is an air supply channel with a spiral structure, one side wall of the volute body is provided with a second air outlet, and a channel switching mechanism is provided on the side of the volute body close to the second air outlet, the air supply channel can be divided into a first channel and a second channel by the channel switching mechanism, and a conducting or blocking structure can be formed between the first channel and the second channel by the channel switching mechanism, when a conducting structure is formed between the first channel and the second channel, the first channel and the second channel are connected to the first air outlet, and when a blocking structure is formed between the first channel and the second channel, the first channel is connected to the second air outlet.

[0007] In the above description, as a further solution, the flow channel switching mechanism includes a blocking member, a second motor and a guide block, one end of the blocking member is slidably connected to the guide block, the other end of the blocking member extends to the interior of the volute body, and the blocking member can be moved between the first flow channel and the second flow channel through the second motor.

[0008] In the above description, as a further solution, one end of the baffle member connected to the guide block is a horizontally arranged exhaust baffle plate, and a rack portion is provided on one side of the exhaust baffle plate. The exhaust baffle plate is transmitted to the output shaft of the second motor through the rack portion, and the exhaust baffle plate can move horizontally along the guide block at the bottom of the second air outlet.

[0009] In the above description, as a further solution, the baffle member extends to one end of the volute body and is a flow channel baffle plate arranged to be tilted downward. The flow channel baffle plate can move horizontally along the bottom of the second air outlet, and when the exhaust baffle plate is separated from the second air outlet, the flow channel baffle plate can abut between the first flow channel and the second flow channel, and the second flow channel forms a closed structure, and the first flow channel is conductively connected with the second air outlet.

[0010] A centrifugal fan comprises a front cover, a rear cover and the above-mentioned volute air path switching structure, the front cover and the rear cover are respectively fixedly connected to the front end face and the rear end face of the volute body, and the front cover is provided with an air inlet at the position of the impeller, an impeller motor is provided inside the volute body, and the impeller is rotatably arranged inside the volute body through the impeller motor.

[0011] In the above description, as a further solution, a confluence base is provided at the bottom of the volute body, the confluence base is conductively connected to the first air outlet, and a confluence outlet is provided on one side of the flow base close to the rear cover.

[0012] In the above description, as a further solution, a heating plate is provided inside the confluence base, and the heating plate is arranged between the first air outlet and the confluence air outlet.

[0013] The beneficial effects produced by the utility model are as follows:

[0014] The present application discloses a volute air path switching structure and a centrifugal fan thereof, which can be located between a first flow channel and a second flow channel through a flow path switching mechanism to form a conducting or blocking structure, thereby changing the flow direction of the air supply flow channel to the first air outlet or the second air outlet, so that the volute body air path has a variety of structural states, which facilitates the centrifugal fan to be located in different functional appliances for blowing air. At the same time, the centrifugal fan with a volute body air path switching structure has a compact structure and is suitable for application in various household electrical and industrial equipment with functional switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of a volute air path switching structure and a centrifugal fan thereof at a first angle described in an embodiment;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of a volute air path switching structure and a centrifugal fan thereof at a second angle described in an embodiment;

[0017] Figure 3 A schematic diagram of the internal structure of a volute air path switching structure and a centrifugal fan thereof according to an embodiment;

[0018] Figure 4 A schematic diagram of the structural decomposition of a volute air path switching structure and a centrifugal fan thereof according to an embodiment;

[0019] Figure 5 It is a structural schematic diagram of a volute air path switching structure and a flow path switching mechanism in a centrifugal fan described in an embodiment;

[0020] Figure 6 It is a schematic diagram of the structural state of the first flow direction of the centrifugal fan in the embodiment;

[0021] Figure 7 It is a schematic diagram of the structural state of the second flow direction in the centrifugal fan described in the embodiment;

[0022] In the figure: 11-front cover, 111-air inlet, 12-rear cover, 13-volute body, 131-first flow channel, 132-second flow channel, 133-second air outlet, 134-first air outlet, 2-convergence base, 21-convergence air outlet, 3-impeller motor, 4-impeller, 5-flow channel switching mechanism, 51-blocking member, 511-flow channel baffle plate, 512-exhaust baffle plate, 513-rack portion, 52-second motor, 53-guide block. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the implementation modes are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0024] See also Figure 1-7A centrifugal fan specifically implemented therein comprises a front cover 11, a rear cover 12, a volute body 13 and an impeller 4 rotatably arranged inside the volute body 13, the front cover 11 and the rear cover 12 are respectively fixedly connected to the front end face and the rear end face of the volute body 13, and the front cover 11 is provided with an air inlet 111 at the position of the impeller 4, the volute body 13 is provided with an impeller 4 motor 3, the impeller 4 is rotatably arranged inside the volute body 13 through the impeller 4 motor 3, one end of the volute body 13 is a first air outlet 134, the interior of the volute body 13 is an air supply channel with a spiral structure, and one side wall of the volute body 13 is provided with a second outlet Air port 133, a flow channel switching mechanism 5 is provided on one side of the volute body 13 close to the second air outlet 133, and the air supply flow channel can be separated into a first flow channel 131 and a second flow channel 132 by the flow channel switching mechanism 5. A conducting or blocking structure can be formed between the first flow channel 131 and the second flow channel 132 by the flow channel switching mechanism 5. When a conducting structure is formed between the first flow channel 131 and the second flow channel 132, the first flow channel 131 and the second flow channel 132 are connected to the first air outlet 134, and when a blocking structure is formed between the first flow channel 131 and the second flow channel 132, the first flow channel 131 is connected to the second air outlet 133.

[0025] The flow channel switching mechanism 5 can be located between the first flow channel 131 and the second flow channel 132 to form a conducting or blocking structure, thereby changing the flow direction of the air supply channel to the first air outlet 134 or the second air outlet 133, so that the air path of the volute body 13 has a variety of structural states, which makes it convenient for the centrifugal fan to be located in different functional appliances for blowing air. At the same time, the centrifugal fan with the air path switching structure of the volute body 13 has a compact structure and is suitable for application in various household electrical and industrial equipment with functional switching.

[0026] The specific structure of the flow channel switching mechanism 5 is as follows: Figure 5 As shown, the flow channel switching mechanism 5 includes a blocking member 51, a second motor 52 and a guide block 53, one end of the blocking member 51 is slidably connected to the guide block 53, the other end of the blocking member 51 extends to the interior of the volute body 13, and the blocking member 51 can be moved between the first flow channel 131 and the second flow channel 132 through the second motor 52, one end of the blocking member 51 connected to the guide block 53 is a horizontally arranged exhaust baffle plate 512, one side of the exhaust baffle plate 512 is provided with a rack portion 513, the exhaust baffle plate 512 is driven by the output shaft of the second motor 52 through the rack portion 513, and the exhaust baffle plate 512 can be horizontally moved along the guide block 53 at the bottom of the second air outlet 133.

[0027] When the flow channel switching mechanism 5 is working: the blocking member 51 extends to one end of the volute body 13 to form a flow channel baffle plate 511 which is arranged to be tilted downward, and the flow channel baffle plate 511 moves horizontally along the guide block 53 to the side away from the second air outlet 133, and when the exhaust baffle plate 512 is separated from the second air outlet 133, the flow channel baffle plate 511 can abut between the first flow channel 131 and the second flow channel 132, and the second flow channel 132 forms a closed structure, such as Figure 7 As shown, the first flow channel 131 is conductively connected with the second air outlet 133;

[0028] The flow channel baffle plate 511 can move horizontally along the guide block 53 toward the side close to the second air outlet 133, and the exhaust baffle plate 512 abuts against the lower side of the second air outlet, so that a conductive structure is formed between the first flow channel 131 and the second flow channel 132, such as Figure 6 As shown, the wind can be blown from the first flow channel 131 and the second flow channel 132 to the first air outlet 134 in sequence.

[0029] When a centrifugal fan is applied to a pet drying box or an electric hair dryer, a confluence base 2 is provided at the bottom of the volute body 13, and the confluence base 2 is conductively connected to the first air outlet 134. A confluence outlet 21 is provided on the side of the flow base close to the rear cover 12. A heating plate is provided inside the confluence base 2, and the heating plate is arranged between the first air outlet 134 and the confluence outlet 21. The flow channel switching mechanism 5 can be used to control whether the airflow is blown toward the confluence base 2 along the first flow channel 131 and the second flow channel 132, thereby changing the direction of the airflow and switching between the cold air or hot air functions.

[0030] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A volute air path switching structure, comprising a volute body and a rotatable impeller arranged inside the volute body, one end of the volute body is a first air outlet, and the interior of the volute body is an air supply channel with a spiral structure, characterized in that: A second air outlet is provided on one side wall of the volute body, and a flow channel switching mechanism is provided on one side of the volute body close to the second air outlet. The air supply flow channel can be separated into a first flow channel and a second flow channel by the flow channel switching mechanism, and a conducting or blocking structure can be formed between the first flow channel and the second flow channel by the flow channel switching mechanism; When a conducting structure is formed between the first flow channel and the second flow channel, the first flow channel and the second flow channel are connected to the first air outlet; When a blocking structure is formed between the first flow channel and the second flow channel, the first flow channel is conductively connected to the second air outlet.

2. A volute air path switching structure according to claim 1, characterized in that: The flow channel switching mechanism includes a blocking member, a second motor and a guide block, one end of the blocking member is slidably connected to the guide block, the other end of the blocking member extends to the interior of the volute body, and the blocking member can be moved between the first flow channel and the second flow channel through the second motor.

3. A volute air path switching structure according to claim 2, characterized in that: One end of the baffle member connected to the guide block is a horizontally arranged exhaust baffle plate, and a rack portion is provided on one side of the exhaust baffle plate. The exhaust baffle plate is driven by the output shaft of the second motor through the rack portion, and the exhaust baffle plate can move horizontally along the guide block at the bottom of the second air outlet.

4. A volute air path switching structure according to claim 3, characterized in that: The baffle member extends to one end of the volute body and is a flow channel baffle plate arranged to be inclined downward. The flow channel baffle plate can move horizontally below the second air outlet, and when the exhaust baffle plate is separated from the second air outlet, the flow channel baffle plate can abut between the first flow channel and the second flow channel, and the second flow channel forms a closed structure, and the first flow channel is conductively connected with the second air outlet.

5. A centrifugal fan, comprising a front cover, a rear cover and a volute air path switching structure according to any one of claims 1 to 4, characterized in that: The front cover and the rear cover are respectively fixedly connected to the front end face and the rear end face of the volute body, and the front cover is provided with an air inlet at the position of the impeller. An impeller motor is arranged inside the volute body, and the impeller is rotatably arranged inside the volute body through the impeller motor.

6. The centrifugal fan according to claim 5, characterized in that: A confluence base is provided at the bottom of the volute body, the confluence base is conductively connected with the first air outlet, and a confluence air outlet is provided on one side of the confluence base close to the rear cover.

7. The centrifugal fan according to claim 6, characterized in that: A heating plate is provided inside the confluence base, and the heating plate is arranged between the first air outlet and the confluence air outlet.

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