A cage-type impeller and an impeller group

Abstract

The present invention provides a cage-type impeller and an impeller group. The cage-type impeller includes a cylindrical impeller main body, and a first impeller end portion and a second impeller end portion disposed at both ends of the impeller main body; main body fan blades are disposed at the side wall position of the impeller main body; the main body fan blades are strip-shaped, and the main body fan blades extend from the first impeller end portion to the second impeller end portion; on the impeller main body, an electric heating tube is disposed around the axis of the impeller main body; a cooling medium channel is disposed in the electric heating tube; a cooling medium channel external interface is disposed at the first impeller end portion and / or the second impeller end portion; the cooling medium channel is communicated with the cooling medium channel external interface. The present invention can be widely applied to refrigeration, heating or high-temperature environments, has a long service life and low energy consumption.

Description

Technical Field

[0001] The present invention relates to a component that generates wind power by rotation, particularly an impeller used in refrigeration, heating, or high-temperature environments. Background Art

[0002] An impeller is a rotating component provided with blades (or fan blades), which can stir the surrounding gas or liquid during rotation to make it flow, and is widely used in many production and life fields.

[0003] At normal temperature, the impeller can work properly, but in non-normal temperature situations, the working state of the impeller will face severe tests. For example, in a high-temperature environment, the high-temperature external environment causes the temperature of the impeller itself to rise. When the temperature rises to a certain level, the properties of the material of the impeller itself will change, such as a decrease in strength, etc. This change results in a low service life of the impeller and even an inability to meet the working requirements. Another example is in the field of air-conditioning refrigeration. Usually, air-conditioning equipment needs to be provided with a cold source and an air delivery device mainly composed of an impeller to achieve the established function of adjusting the temperature. However, the cold source and the air delivery device will occupy a large space, which is not conducive to the reasonable layout of the air-conditioning equipment. Especially in the field of domestic air-conditioning equipment, consumers are increasingly pursuing air-conditioning equipment with a small volume, and the existing technologies are difficult to meet this demand more. In addition, the wind generated by the air delivery device needs to pass through the heat exchange components of the cold source for heat exchange, which will generate a large wind resistance and increase energy consumption.

[0004] In an environment that requires heating, it is usually necessary for an impeller to generate wind power to transfer the heat generated by the heat source. This heating system is applied in many fields, such as the air-conditioning field or the hot processing and manufacturing field. This solution of separately arranging the heat source and the impeller also has the problems of large space occupation of the system and increased energy consumption due to the need for the wind to pass through the heat exchange components for heat exchange. Summary of the Invention

[0005] In order to solve the problems of large space occupation and high energy consumption existing in the prior art, the present invention provides a cage-type impeller and an impeller group.

[0006] The technical solution of the present invention is as follows:

[0007] A cage-type impeller, comprising a cylindrical impeller body, and a first impeller end and a second impeller end provided at both ends of the impeller body; main fan blades are provided at the side wall position of the impeller body; the main fan blades are strip-shaped, and the main fan blades extend from the first impeller end to the second impeller end; on the impeller body, an electric heating tube is arranged around the axis of the impeller body; a cooling medium channel is arranged in the electric heating tube; a cooling medium channel external interface is provided at the first impeller end and / or the second impeller end; the cooling medium channel is communicated with the cooling medium channel external interface.

[0008] Optionally, the cooling medium channel external interface includes a cooling medium inlet and a cooling medium outlet; both the cooling medium inlet and the cooling medium outlet are provided at the first impeller end or the second impeller end.

[0009] Optionally, a rotating shaft is provided at the first impeller end and / or the second impeller end; the cooling medium channel external interface is provided on the rotating shaft.

[0010] Optionally, an insulating layer is provided between the electric heating tube and the first impeller end and / or the second impeller end.

[0011] Optionally, a conductive ring is provided on the rotating shaft, and the conductive ring is connected to the electric heating tube; an insulating layer is provided between the conductive ring and the rotating shaft.

[0012] Optionally, a first end medium flow channel is provided inside the first impeller end, and / or a second end medium flow channel is provided inside the second impeller end; the cooling medium channel external interface is communicated with the first end medium flow channel and / or the second end medium flow channel.

[0013] Optionally, the second impeller end includes a tapered section; the radial dimension of the tapered section gradually decreases from adjacent to the impeller body to away from the impeller body; the second end medium flow channel provided in the tapered section extends along the direction from adjacent to the impeller body to away from the impeller body.

[0014] Optionally, a medium outlet communicated with the second end medium flow channel is provided at the second impeller end;

[0015] Optionally, an insulating layer is provided between the electric heating tube and the impeller body.

[0016] Optionally, a groove is provided around the axis of the impeller body on the outer side of the impeller body, and the electric heating tube is embedded in the groove.

[0017] The impeller group includes several cage impellers as described above, and the cage impellers are arranged in series.

[0018] The technical effects of the present invention are as follows:

[0019] In the field of heating, for the cage impeller and impeller group of the present invention, an electric heating tube is wound around the impeller body. By connecting to a power supply, the combination of resistance heating and inductive heating can be achieved, serving as a heat source. Therefore, the technical solution of the present invention integrates the heat source with the impeller, saving space and avoiding the additional energy consumption caused by the existence of heat exchange components.

[0020] In the field of refrigeration, for the cage impeller and impeller group of the present invention, a flowing cooling medium can be introduced into the electric heating tube, enabling the impeller to cool the air while transporting it. This can avoid the additional setting of a cold source, that is, integrating the cage impeller with the cold source, enabling the impeller to undertake the functions of both the cold source and air transportation, effectively reducing the volume of air conditioning equipment and also avoiding the additional energy consumption caused by the existence of heat exchange components.

[0021] In a high-temperature environment, a flowing cooling medium can be introduced into the electric heating tube to appropriately cool the electric heating tube and the entire cage impeller and impeller group, avoiding adverse changes such as reduced strength after overheating in a high-temperature environment, thereby stabilizing the properties of the impeller material, increasing the service life of the impeller, and meeting the usage requirements.

[0022] In summary, the technical solution of the present invention achieves the purpose of the present invention.

[0023] The further effects of the above optional methods will be described below in conjunction with specific embodiments. Description of the Drawings

[0024] Figure 1 It is a cross-sectional view of the first embodiment of the cage impeller of the present invention.

[0025] Figure 2 It is Figure 1 a perspective view of the shown embodiment.

[0026] Figure 3 It is a cross-sectional view of the second embodiment of the cage impeller of the present invention.

[0027] Figure 4 It is a partial cross-sectional view of the third embodiment of the cage impeller of the present invention.

[0028] Figure 5 It is Figure 4 a perspective view of the shown embodiment.

[0029] Figure 6 It is a partial cross-sectional view of the fourth embodiment of the cage impeller of the present invention.

[0030] Figure 7 This is a partial cross-sectional view of the fifth embodiment of the cage impeller of the present invention.

[0031] Figure 8 is Figure 7 a perspective view of the illustrated embodiment.

[0032] Figure 9 This is an enlarged partial cross-sectional view of the cage impeller of the present invention.

[0033] The reference numerals in the figures are explained as follows:

[0034] 101, medium outlet; 102, rotating shaft; 103, second-end medium flow channel; 104, tapered section; 105, main body fan blade; 106, electric heating tube; 107, first-end medium flow channel; 108, first-end fan blade; 109, first-end medium flow channel; 110, rotating shaft; 111, medium inlet.

[0035] 301, medium outlet; 302, medium inlet; 303, second-end medium outflow channel; 304, second-end medium inflow channel; 305, tapered section; 306, electric heating tube; 307, electric heating tube; 308, main body fan blade; 309, first-end medium flow channel.

[0036] 401, medium outlet; 402, second-end medium flow channel; 403, electric heating tube; 404, main body fan blade; 405, medium inlet.

[0037] 601, medium outlet; 602, electric heating tube; 603, groove; 604, medium inlet.

[0038] 701, second-end medium outflow channel; 702, medium outlet; 703, medium inlet; 704, second-end medium inflow channel; 705, electric heating tube; 706, electric heating tube.

[0039] 901, rotating shaft; 902, insulating layer; 903, conductive ring; 904, welding layer; 905, insulating layer; 906, electric heating tube. Detailed implementation manners

[0040] The technical solutions of the present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings.

[0041] Figure 1 and Figure 2Shows the specific structure of the first embodiment of the present invention. The cage impeller includes an impeller body formed into a cylindrical shape by enclosing a plurality of strip-shaped main fan blades 105. The main fan blades 105 are arranged at the side wall position of the cylindrical impeller body. At both ends of the impeller body (the two bottom positions of the cylinder), a first impeller end ( Figure 1 the right end in Figure 1 and a second impeller end (

[0042] the left end in

[0043] are provided. The main fan blades 105 extend from the first impeller end to the second impeller end. An electric heating tube 106 is arranged on the outer side of the side wall of the impeller body. The electric heating tube 106 is spirally wound around the side wall of the impeller body. In other embodiments, the electric heating tube can also be arranged on the inner side of the side wall of the impeller body. The electric heating tube 106 is made of a material that can be energized for heating, such as copper alloy. The electric heating tube 106 is a hollow pipe, and this hollow pipe serves as a cooling medium channel for the cooling medium to flow. Figure 1 The first impeller end includes an annular body and a first end fan blade 108 in the middle of the annular body. Wherein a first end medium flow channel 107 is arranged in the annular body, and a first end medium flow channel 109 is arranged in the first end fan blade 108. The first end medium flow channel 107 is communicated with the first end medium flow channel 109. An outer interface of a cooling medium channel of the electric heating tube 106 is communicated with the first end medium flow channel 107, and another outer interface of the cooling medium channel of the electric heating tube 106 is communicated with the second end medium flow channel 103. A rotating shaft 110 with a hollow inner cavity is also arranged at the first impeller end. A medium inlet 111 is arranged on the rotating shaft 110. The medium inlet 111 is communicated with the inner cavity of the rotating shaft 110, and the inner cavity of the rotating shaft 110 is communicated with the first end medium flow channel 109.

[0044] The second impeller end includes a tapered section 104. The radial dimension of the tapered section 104 gradually decreases from Figure 1 the right side to the left side in Figure 2 . A second end medium flow channel 103 is arranged in the tapered section 104. A rotating shaft 102 with a hollow inner cavity is also arranged at the second impeller end. A medium outlet 101 is arranged on the rotating shaft 102. The medium outlet 101 is communicated with the inner cavity of the rotating shaft 102.

[0045] When the cage impeller is used in a heating environment, by energizing the electric heating tube 106, the electric heating tube 106 generates heat under the action of resistance heating and inductive heating, serving as a heat source. As the cage impeller rotates, the electric heating tube 106 continuously exchanges heat with the rapidly flowing air around it, with high heat exchange efficiency. Additionally, since there is no need to increase the wind force to overcome the wind resistance generated by the heat exchange components of the heat source in the prior art, the cage impeller of the present invention can operate at a lower power, saving energy.

[0046] When the cage impeller is used in a cooling environment, a cooling medium is injected from the medium inlet 111. The cooling medium passes through the rotating shaft 110, the first end medium flow channel 109, the first end medium flow channel 107, the electric heating tube 106, the second end medium flow channel 103, the rotating shaft 102, and then is discharged from the medium outlet 101. During the above flow process, the cooling medium exchanges heat with the surrounding environment of the cage impeller, producing a cooling effect on the surrounding environment. Since it is possible to avoid additionally setting a cold source, that is, integrating the cage impeller with the cold source, the impeller can simultaneously undertake the functions of the cold source and air transportation, effectively reducing the volume of the air conditioning equipment, and also having a high heat exchange efficiency. At the same time, due to avoiding the wind resistance generated by the existence of the heat exchange components, the operation of the cage impeller also avoids additional energy consumption.

[0047] When the cage impeller is used in a high-temperature environment, a flowing cooling medium can also be introduced into the cage impeller in the aforementioned manner to appropriately cool the cage impeller, so as to avoid adverse changes such as a decrease in strength after the cage impeller overheats in the high-temperature environment, thereby stabilizing the properties of the impeller material, increasing the service life of the impeller, and meeting the usage requirements.

[0048] When the cage impeller rotates, at the second impeller end, the cooling medium flows from the impeller body through the second end medium flow channel 103 towards the medium outlet 101. Due to the existence of centrifugal force, the above flow will be blocked by the centrifugal force. In order to reduce the resistance of the above flow, a conical cone section 104 is adopted, which can better reduce the blocking effect of the centrifugal force compared to the disc shape at the first impeller end.

[0049] Figure 3 Shows the specific structure of the second embodiment of the cage impeller of the present invention. The same as the Figure 1 embodiment shown, the cage impeller includes an impeller body formed by enclosing a cylindrical shape with a plurality of long strip-shaped main fan blades 308. The main fan blades 308 are arranged at the side wall position of the cylindrical impeller body. At both ends of the impeller body, there are a first impeller end ( Figure 3 the right end in Figure 3On the left side of the first impeller end. The main impeller blades 308 extend from the first impeller end to the second impeller end. Electric heating tubes 306 and 307 are arranged on the outer side of the side wall of the impeller body. The electric heating tubes 306 and 307 are spirally wound around the side wall of the impeller body. The electric heating tubes 306 and 307 are made of a material that can be electrically heated, such as copper alloy. The electric heating tubes 306 and 307 are hollow pipes, and the hollow pipes serve as cooling medium channels for the cooling medium to flow through.

[0050] The first impeller end includes an annular body, and a first end medium flow channel 309 is arranged inside the annular body. The second impeller end includes a tapered section 305. The radial dimension of the tapered section 305 gradually decreases from Figure 3 the right side to the left side in the figure. A non-communicating second end medium inflow channel 304 and a second end medium outflow channel 303 are arranged inside the tapered section 305. A rotating shaft with a double-layer hollow inner cavity is also arranged at the second impeller end. A medium inlet 302 and a medium outlet 301 are arranged on the rotating shaft, and the medium inlet 302 and the medium outlet 301 are respectively communicated with two inner cavities in the rotating shaft. The two inner cavities in the rotating shaft are also respectively communicated with the second end medium inflow channel 304 and the second end medium outflow channel 303. The outer interface (cooling medium inlet) of the cooling medium channel of the electric heating tube 307 is communicated with the second end medium inflow channel 304; the outer interface (cooling medium outlet) of the cooling medium channel of the electric heating tube 306 is communicated with the second end medium outflow channel 303. The electric heating tubes 307 and 306 are the same electric heating tube, and different identifiers are given only to distinguish the flow direction of the cooling medium therein.

[0051] Figure 3 The working process of the illustrated embodiment is basically the same as that of Figure 1 the illustrated embodiment, except for the flow direction of the cooling medium, which is described herein. When the cooling medium needs to be enabled, the cooling medium is introduced from the medium inlet 302, passes through the second end medium inflow channel 304, the electric heating tube 307, the first end medium flow channel 309, the electric heating tube 306, and the second end medium outflow channel 303, and finally is discharged from the medium outlet 301.

[0052] Figure 4 and Figure 5 shows the specific structure of the third embodiment of the cage impeller of the present invention. The cage impeller includes an impeller body formed by enclosing a cylindrical shape with a plurality of long strip-shaped main impeller blades 404. The main impeller blades 404 are arranged at the side wall position of the cylindrical impeller body. At both ends of the impeller body, there are a first impeller end ( Figure 4 the right side end in the figure) and a second impeller end ( Figure 4On the left side of the end part). The main impeller blades 404 extend from the first impeller end to the second impeller end. An electric heating tube 403 is arranged on the outer side of the side wall of the impeller body. The electric heating tube 403 is wound around the side wall of the impeller body. The electric heating tube 403 is made of a material that can be electrified and heated, such as copper alloy. The electric heating tube 403 is a hollow pipe, and this hollow pipe serves as a cooling medium channel for the cooling medium to flow through.

[0053] At the first impeller end, a rotating shaft with a hollow inner cavity is also provided. A medium inlet 405 is arranged on the rotating shaft. The medium inlet 405 communicates with the inner cavity of the rotating shaft, and the inner cavity also communicates with the external interface (cooling medium inlet) of the cooling medium channel of the electric heating tube 403.

[0054] At the second impeller end, a rotating shaft with a hollow inner cavity (the second end medium flow channel 402) is also provided. A medium outlet 401 is arranged on the rotating shaft. The medium outlet 401 communicates with the second end medium flow channel 402, and the second end medium flow channel 402 also communicates with the external interface (cooling medium outlet) of the cooling medium channel of the electric heating tube 403.

[0055] Figure 4 The working process of the shown embodiment is the same as that of the previous two embodiments, except for the flow process of the cooling medium, which is described herein. When it is necessary to enable the cooling medium, the cooling medium is introduced from the medium inlet 405, passes through the electric heating tube 403 and the second end medium flow channel 402, and finally is discharged from the medium outlet 401.

[0056] Figure 6 Shows the specific structure of the fourth embodiment of the cage impeller of the present invention. Identical to Figure 4 the structure of the third embodiment shown. For the parts with the same name but different identifiers (medium inlet, electric heating tube, medium outlet) in the two embodiments, their structural functions are the same and will not be elaborated here. Different from Figure 4 the shown embodiment, at the position where the electric heating tube 602 is located on the impeller body, a groove 603 is correspondingly provided, and the electric heating tube 602 is embedded in the groove 603. This setting scheme can save space and facilitate installation when the assembly gap between the impeller body and other adjacent components is narrow.

[0057] Figure 7 and Figure 8 Shows the specific structure of the fifth embodiment of the cage impeller of the present invention. The cage impeller includes an impeller body formed by enclosing a cylindrical shape with a plurality of long strip-shaped main impeller blades. The main impeller blades are arranged at the side wall position of the cylindrical impeller body. At both ends of the impeller body, there are a first impeller end ( Figure 7 the right side end in Figure 7The left end of the middle part). The main fan blade extends from the first impeller end to the second impeller end. Outside the side wall of the impeller main body, electric heating tubes 705 and 706 are arranged. The electric heating tubes 705 and 706 are wound around the side wall of the impeller main body. The electric heating tubes 705 and 706 are made of a material that can be energized for heating, such as copper alloy. The electric heating tubes 705 and 706 are hollow pipes, and the hollow pipes serve as cooling medium channels for the cooling medium to flow through.

[0058] At the second impeller end, a rotating shaft with a double-layer hollow inner cavity (the second end medium inflow channel 704 and the second end medium outflow channel 701) is also provided. A medium inlet 703 and a medium outlet 702 are arranged on the rotating shaft. The medium inlet 703 and the medium outlet 702 are respectively communicated with the second end medium inflow channel 704 and the second end medium outflow channel 701. The outer interface (cooling medium inlet) of the cooling medium channel of the electric heating tube 706 is communicated with the second end medium inflow channel 704; the outer interface (cooling medium outlet) of the cooling medium channel of the electric heating tube 705 is communicated with the second end medium outflow channel 701. The electric heating tubes 705 and 706 are the same electric heating tube, and different identifiers are given only to distinguish the flow direction of the cooling medium therein.

[0059] When it is necessary to enable the cooling medium, the cooling medium is introduced from the medium inlet 703, passes through the second end medium inflow channel 704, the electric heating tubes 705, 706, the second end medium outflow channel 701, and finally is discharged from the medium outlet 702.

[0060] The electric heating tubes provided on the cage-type impeller of the present invention need to be provided with an insulating layer to insulate the electric heating tubes from other components because they will be energized for heating. The specific setting method is as Figure 9 shown. An insulating layer is provided between the electric heating tube 906 and the impeller main body it winds around. At the same time, insulating layers 905 are also provided between the first impeller end and the electric heating tube 906 and between the second impeller end and the electric heating tube 906. In order to be electrically connected to an external power source, a conductive ring 903 that can conduct electricity is arranged around the rotating shaft 901. The conductive ring 903 is connected to the electric heating tube 906 by welding, and a conductive welding layer 904 is arranged between the two. An insulating layer 902 is arranged between the conductive ring 903 and the rotating shaft. If necessary, an insulating layer is also arranged between the conductive ring 903 and the first impeller end or the second impeller end. An insulating layer is also arranged between the electric heating tube 906 and the rotating shaft 901.

[0061] The technical solution of the impeller group of the present invention can be described by describing an embodiment. In this embodiment, several such as Figure 4The shown cage impellers are connected in series to form an impeller group. The impeller group can increase the air-blowing capacity compared to a single cage impeller in the working state. The series connection mentioned here refers to the combined connection of multiple cage impellers formed by connecting the first impeller end of one cage impeller to the second impeller end of an adjacent cage impeller. The cooling medium passes through the cage impellers sequentially in one direction. The flow process of the cooling medium can be referred to the description of the working process of Figure 4 the embodiment.

[0062] It should be noted that the above is only a preferred embodiment of the present invention, and thus does not limit the patent protection scope of the present invention. The present invention can also improve the materials and structures of the above various component parts, or use technical equivalents for replacement. Therefore, any equivalent structural changes made by using the description and illustrations of the present invention, or directly or indirectly applied to other related technical fields, are similarly included in the scope covered by the present invention.

Claims

1. A cage impeller, characterized in that: It includes an impeller body in a cylindrical shape, a first impeller end and a second impeller end provided at both ends of the impeller body; main fan blades are provided at the side wall position of the impeller body; the main fan blades are in a strip shape and extend from the first impeller end to the second impeller end; on the impeller body, an electric heating tube is arranged around the axis of the impeller body; a cooling medium channel is arranged in the electric heating tube; a cooling medium channel external interface is provided at the first impeller end and / or the second impeller end; the cooling medium channel is communicated with the cooling medium channel external interface; The cooling medium channel external interface includes a cooling medium inlet and a cooling medium outlet; A first end medium flow channel is arranged in the first impeller end and / or a second end medium flow channel is arranged in the second impeller end; the cooling medium channel external interface is communicated with the first end medium flow channel and / or the second end medium flow channel; The second impeller end includes a conical section; the radial dimension of the conical section gradually decreases from adjacent to the impeller body to away from the impeller body; the second end medium flow channel arranged in the conical section extends from adjacent to the impeller body to away from the impeller body; The cooling medium outlet communicated with the second end medium flow channel is provided at the second impeller end; A rotating shaft is provided at the first impeller end and / or the second impeller end; the cooling medium channel external interface is arranged on the rotating shaft; A conductive ring is arranged on the rotating shaft, and the conductive ring is connected to the electric heating tube; an insulating layer is arranged between the conductive ring and the rotating shaft.

2. The cage impeller according to claim 1, characterized in that: Both the cooling medium inlet and the cooling medium outlet are provided at the second impeller end.

3. The cage impeller according to claim 1, characterized in that: An insulating layer is arranged between the electric heating tube and the first impeller end and / or the second impeller end.

4. The cage impeller according to claim 1, wherein: An insulating layer is arranged between the electric heating tube and the impeller body.

5. The cage impeller according to claim 1, characterized in that: A groove is arranged outside the impeller body around the axis of the impeller body, and the electric heating tube is embedded in the groove.

6. Impeller group, characterized in that: It includes a number of cage impellers as described in claim 1, and the cage impellers are arranged in series.

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