A centrifugal fan with heat dissipation optimization structure

Abstract

The invention discloses a centrifugal fan with a heat dissipation optimization structure, which relates to the technical field of centrifugal fans. With regard to the heat dissipation process of a fan cover in a centrifugal fan, the key is to carry out centralized heat dissipation at the air inlet position of the centrifugal fan, specifically, a self-flow heat dissipation mode is formed based on the "power" of the airflow during the operation of the centrifugal fan, and an atomized spray heat dissipation mode is utilized. Its essence is to limit the structural shape of the choke cone cap sleeve, and utilize the negative pressure formation principle, so that a "double-layer space" with a pressure difference is formed between the inside of the choke cone cap sleeve and the inside of the fan cover, and a temperature sensor is used to detect the airflow temperature inside the fan cover in real time, and the continuously formed negative pressure environment is utilized. On the basis of not interfering with the airflow direction inside the fan cover, an intermittent self-flow heat dissipation mode is formed by adding a detachable structure to the conventional centrifugal fan structure.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal fans, and in particular to a centrifugal fan with a heat dissipation optimization structure. Background Art

[0002] A centrifugal fan consists of two major parts: a motor and an impeller assembly. Its essence is that the motor provides power to drive the impeller to rotate at high speed to generate wind. It should be noted that without considering the temperature of the air entering the fan and the heat dissipation method of the motor structure, the fan may overheat because of the heat generated during the operation of the centrifugal fan itself or due to the external ambient temperature.

[0003] Common heat dissipation methods are to add a cooling structure at the air inlet position, or to spray cooling treatment on the fan casing. The latter heat dissipation method will affect the working environment of the centrifugal fan, such as increasing the humidity in the working environment, while the former heat dissipation method is essentially an external device, which requires additional electrical energy input during its operation, and in order to meet the high wind speed state of the centrifugal fan, the power consumed is higher.

[0004] This application proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide a centrifugal fan with a heat dissipation optimization structure. Regarding the heat dissipation method of a conventional centrifugal fan, the internal temperature of the fan continues to rise due to the external temperature environment and its own operating state. If the outer shell is sprayed for cooling, it will affect the external working environment. If an external cooling structure is used, the operating energy consumption will increase.

[0006] The object of the present invention can be achieved by the following technical scheme: A centrifugal fan with a heat dissipation optimization structure, comprising a motor assembly, a fan cover and a centrifugal impeller, wherein the centrifugal impeller is rotatably mounted at an inner position of the fan cover through the motor assembly, a heat dissipation assembly is arranged at an air inlet position of the fan cover, the heat dissipation assembly comprises a mounting sleeve, a flow-blocking cone cap sleeve, a circulation support pipe and a return air pipe, the center points of the mounting sleeve, the flow-blocking cone cap sleeve and the centrifugal impeller are on the same horizontal axis, and a temperature sensor is installed on the fan cover;

[0007] The return air pipe is installed at the center point of the choke cone cap sleeve, and the choke cone cap sleeve is open along the end close to the centrifugal impeller. The circulation support pipe is installed on the installation sleeve and the choke cone cap sleeve. A rubber paddle is installed at the internal position of the choke cone cap sleeve. A flaring cap is provided at the end position of the return air pipe corresponding to the center point of the centrifugal impeller, and a water injection pump corresponding to the circulation support pipe is provided outside the fan cover.

[0008] It is further configured that: the flow-reducing part and the flow-increasing part are respectively arranged at the installation position of the flow-blocking cone cap sleeve corresponding to the rubber toggle piece, the setting position of the flow-reducing part is close to the installation sleeve, and the setting position of the flow-increasing part is close to the centrifugal impeller;

[0009] The cross section of the flow reducing part corresponding to the choke cone cap sleeve is in an inverted cone shape along the direction from the centrifugal impeller to the mounting sleeve, and the cross section of the flow increasing part corresponding to the choke cone cap sleeve is in a truncated cone shape along the direction from the centrifugal impeller to the mounting sleeve.

[0010] It is further configured as follows: one end of the circulation support pipe is connected to the output end of the water injection pump, and the other end of the circulation support pipe is arranged at the internal position of the flow-blocking cone cap sleeve and is installed with an atomizing nozzle, and the setting position of the atomizing nozzle corresponds to the downflow part.

[0011] It is further configured as follows: a cooperative blade group is rotatably installed at the position of the return air pipe corresponding to the flow increase portion, the outer edge position of the cooperative blade group is slidingly connected to the inner wall of the choke cone cap sleeve, and the cross-section of the rubber paddle is in an upward curved arch shape along the direction pointing to the centrifugal impeller.

[0012] It is further configured as follows: one end of the return air pipe corresponding to the expansion cap is open, and a vent is provided at a position of the return air pipe corresponding to the downflow portion, and an electromagnetic induction component is provided at a position of the return air pipe corresponding to the vent.

[0013] It is further configured as follows: a piston block is slidably mounted on the inner wall of the return air pipe corresponding to the air release port, and a connecting spring is mounted between the piston block and the bottom end of the inner wall of the return air pipe.

[0014] It is further configured as follows: an electric push rod is installed at the external position of the blocking cone cap sleeve corresponding to the mounting sleeve, an active lever is installed at the output end of the electric push rod, the active lever extends to the inside of the return air pipe and passes through the piston block, and the active lever and the piston block are slidably connected.

[0015] The present invention has the following beneficial effects:

[0016] 1. The overall structure is that a heat dissipation component is added to the air inlet position without changing the structure of the conventional centrifugal fan. The heat dissipation component is mainly based on the principle of atomized spray heat dissipation, but the key structure utilizes the structural shape of the flow-blocking cone cap sleeve. Specifically, the flow-blocking cone cap sleeve is formed into a downflow part and a flow-increasing part. The airflow direction during the operation of the centrifugal fan is utilized to form a "double-layer space" with a pressure difference between the inside of the flow-blocking cone cap sleeve and the inside of the fan cover. The structural characteristics of the return air pipe are utilized to form a counterflow of the hot air flow at a local position inside the fan cover, and combined with the heat dissipation method of atomized spray to form a concentrated-diffused heat dissipation method;

[0017] 2. In combination with the above content, it is explained that: a temperature sensor is provided in the overall structure. The temperature sensor is mainly used to detect the gas temperature of the air flow channel inside the fan cover in real time, and drives the movement of the piston block through the electric push rod, thereby forming an intermittent self-flowing heat dissipation method on the basis of the self-flowing heat dissipation method. Its purpose is to further reduce energy consumption on the basis of maintaining normal heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a centrifugal fan with a heat dissipation optimization structure proposed by the present invention;

[0020] Figure 2 This is a disassembled diagram of a corresponding heat dissipation component in a centrifugal fan with a heat dissipation optimization structure proposed by the present invention;

[0021] Figure 3 A partial cross-sectional view of a heat dissipation component corresponding to a fan cover of a centrifugal fan with a heat dissipation optimization structure proposed by the present invention;

[0022] Figure 4 A cross-sectional view of a flow-blocking cone cap sleeve in a centrifugal fan with a heat dissipation optimization structure proposed by the present invention;

[0023] Figure 5 A centrifugal fan with a heat dissipation optimization structure proposed by the present invention Figure 4 Split diagram of ;

[0024] Figure 6 A cross-sectional view of a heat dissipation component in a centrifugal fan with a heat dissipation optimization structure proposed by the present invention.

[0025] In the figure: 1. Motor assembly; 2. Fan cover; 3. Circulation support pipe; 4. Mounting sleeve; 5. Temperature sensor; 6. Centrifugal impeller; 7. Piston block; 8. Expanding cap; 9. Return air pipe; 10. Thwart cone cap sleeve; 11. Co-acting blade group; 12. Rubber toggle piece; 13. Active lever; 14. Electric push rod; 15. Connecting spring; 16. Vent; 17. Electromagnetic induction assembly. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1: For the heat dissipation method of conventional centrifugal fans, the internal temperature of the fan continues to rise due to the external temperature environment and its own operating state. If the shell spray cooling treatment is used, it will affect the external working environment. If an external cooling structure is used, it will increase the operating energy consumption. The following technical solutions are proposed:

[0028] Reference Figures 1 to 6 In this embodiment, a centrifugal fan with a heat dissipation optimization structure includes a motor assembly 1, a fan cover 2 and a centrifugal impeller 6. The centrifugal impeller 6 is rotatably installed at an inner position of the fan cover 2 through the motor assembly 1. A heat dissipation assembly is arranged at an air inlet position of the fan cover 2. The heat dissipation assembly includes a mounting sleeve 4, a flow-blocking cone cap sleeve 10, a circulation support pipe 3 and a return air pipe 9. The center points of the mounting sleeve 4, the flow-blocking cone cap sleeve 10 and the centrifugal impeller 6 are on the same horizontal axis. A temperature sensor 5 is installed on the fan cover 2;

[0029] The return air pipe 9 is installed at the center point of the choke cone cap sleeve 10, and the choke cone cap sleeve 10 is open along the end close to the centrifugal impeller 6. The circulation support pipe 3 is installed on the installation sleeve 4 and the choke cone cap sleeve 10. A rubber paddle 12 is installed at the internal position of the choke cone cap sleeve 10. A flaring cap 8 is arranged at the end position of the return air pipe 9 corresponding to the center point of the centrifugal impeller 6. A water injection pump corresponding to the circulation support pipe 3 is arranged outside the fan cover 2. One end of the circulation support pipe 3 is connected to the output end position of the water injection pump, and the other end of the circulation support pipe 3 is arranged at the internal position of the choke cone cap sleeve 10 and is installed with an atomizing nozzle. The setting position of the atomizing nozzle corresponds to the downflow part.

[0030] Basic working principle: For the conventional centrifugal fan structure, the heat dissipation method of the motor component 1 is not taken into consideration. The key is the heat dissipation method adopted for the high temperature environment caused by the external temperature environment and the working state of the centrifugal impeller 6. Specifically, it is as follows: only an independent heat dissipation component is added at the air inlet position on the fan cover 2. The heat dissipation component can be quickly installed on the fan cover 2 through the installation sleeve 4. By limiting the diameter of the installation sleeve 4, it can adapt to centrifugal fans of various specifications. It should also be noted that it is mainly to cool the gas sucked into the fan cover 2;

[0031] The heat dissipation method mainly adopts water cooling, specifically, a water injection pump is connected to the circulation support pipe 3, referring to Figure 4The circulation support tube 3 can be used as an installation structure between the flow-blocking cone cap sleeve 10 and the installation sleeve 4, and under the operation of the water injection pump, the inside of the circulation support tube 3 is filled with cold water. Then, when the external air passes through the circulation support tube 3, the cold water inside the circulation support tube 3 can "absorb" the heat in the gas, thereby forming a self-flowing heat dissipation method.

[0032] Embodiment 2: This embodiment further explains the flow-blocking cone cap sleeve structure in Embodiment 1:

[0033] The flow-reducing part and the flow-increasing part are respectively arranged at the installation position of the flow-blocking cone cap sleeve 10 corresponding to the rubber toggle piece 12. The setting position of the flow-reducing part is close to the installation sleeve 4, and the setting position of the flow-increasing part is close to the centrifugal impeller 6.

[0034] The cross section of the flow reducing part of the throttling cone cap sleeve 10 is in the shape of an inverted cone along the direction from the centrifugal impeller 6 to the mounting sleeve 4 , and the cross section of the flow increasing part of the throttling cone cap sleeve 10 is in the shape of a truncated cone along the direction from the centrifugal impeller 6 to the mounting sleeve 4 .

[0035] Solution description: Combined with the first embodiment, the following is described with reference to Figure 5 , the external air enters the fan cover 2 through the air inlet, but the external airflow first passes through the flow blocking cone cap sleeve 10, which is explained as follows:

[0036] S1: When the external air passes through the downflow portion on the blocking cone cap sleeve 10, the flow direction of the external air is mainly changed partially, and then the airflow passes through the flow increasing portion on the blocking cone cap sleeve 10 again. In this process, the external air passes through the blocking cone cap sleeve 10 quickly. According to aerodynamics, when the external air passes through the flow increasing portion on the blocking cone cap sleeve 10, a pressure difference is formed on the inside and outside of the blocking cone cap sleeve 10, which is specifically manifested as the gas inside the blocking cone cap sleeve 10 is sucked out, so that a negative pressure environment is formed inside the blocking cone cap sleeve 10;

[0037] S2: In combination with S1, when a negative pressure environment is formed inside the flow-blocking cone cap sleeve 10, the rubber paddle 12 therein deforms in a direction close to the centrifugal impeller 6 under the negative pressure environment, referring to Figure 6 For example, the rubber paddle 12 is continuously deformed in a direction close to the centrifugal impeller 6, so that the opening of the rubber paddle 12 relative to the return air pipe 9 is larger;

[0038] S3: In conjunction with Example 1, the water injection pump continuously outputs a medium such as cold water, and continuously sprays it out through the atomizing nozzle on the circulation support pipe 3. The sprayed cold water mist will also be continuously sucked into the interior of the fan cover 2 along with the negative pressure environment, and mixed with the hot air flow inside the fan cover 2, thereby performing a concentrated-diffused heat dissipation method for the hot air flow inside the fan cover 2.

[0039] Embodiment 3: This embodiment is to explain the return air pipe in Embodiment 1:

[0040] A cooperative blade group 11 is rotatably installed at the position of the return air pipe 9 corresponding to the flow increase part, and the outer edge position of the cooperative blade group 11 is slidably connected to the inner wall of the choke cone cap sleeve 10. The cross section of the rubber paddle 12 is in an upward curved arch shape along the direction pointing to the centrifugal impeller 6. One end of the flared cap 8 corresponding to the return air pipe 9 is open, and a vent 16 is provided at the position of the return air pipe 9 corresponding to the downflow part. A piston block 7 is slidably installed on the inner wall position of the return air pipe 9 corresponding to the vent 16. An electromagnetic induction component 17 is provided at the position of the return air pipe 9 corresponding to the vent 16. A connecting spring 15 is installed between the piston block 7 and the bottom end of the inner wall of the return air pipe 9. An electric push rod 14 is installed at the external position of the mounting sleeve 4 corresponding to the choke cone cap sleeve 10. An active push rod 13 is installed at the output end of the electric push rod 14. The active push rod 13 extends to the inside of the return air pipe 9 and passes through the piston block 7, and the active push rod 13 and the piston block 7 are slidably connected.

[0041] Solution description: In conjunction with the second embodiment, when the water injection pump injects cold water mist into the flow-blocking cone cap sleeve 10, it can be understood as "destroying" the negative pressure environment inside the flow-blocking cone cap sleeve 10. The following supplementary description is made for this:

[0042] S4: Referring to S2, when the cold water mist enters the flow-blocking cone cap sleeve 10, the negative pressure environment is "destroyed", so that the rubber paddle 12 slowly returns to its original position under its own elasticity and deforms again in the direction close to the mounting sleeve 4. In this state, the opening area between the rubber paddle 12 and the return air pipe 12 is reduced, mainly to "extend" the retention time of the cold water mist in the flow-blocking cone cap sleeve 10;

[0043] S5: In combination with the second embodiment, when the gas inside the blocking cone cap sleeve 10 is sucked out, the airflow direction inside the blocking cone cap sleeve 10 can drive the cooperative blade group 11 to rotate in a directional manner. When the gas inside the blocking cone cap sleeve 10 has been "completely sucked out", the cooperative blade group 11 loses the rotational power, so that the inside of the blocking cone cap sleeve 10 forms a relatively "closed" state, so as shown in S4, the main purpose is to "extend" the retention time of the cold water mist in the blocking cone cap sleeve 10;

[0044] S6: Further combined with S1, when a negative pressure environment is formed inside the choke cone cap sleeve 10, the gas on the lower side of the corresponding piston block 7 inside the return air pipe 9 will also be sucked out, so that a pressure difference will be formed between the upper and lower sides of the corresponding piston block 7 in the return air pipe 9, which will cause the piston block 7 to move downward until it moves to the position corresponding to the air vent 16, thereby sucking the hot air flow in the corresponding center point area of ​​the centrifugal impeller 6 into the choke cone cap sleeve 10 through the air vent 16-return air pipe 9. On the basis of not interfering with the centrifugal fan, the circulation process of the hot air flow inside the fan cover 2 is realized, and the hot air flow is mixed with the cold water mist to achieve a cooling effect.

[0045] Embodiment 4: In combination with Embodiments 1 to 3, the circulation support pipe is described again. The water injection pump in the present invention is not in a continuous operation state, but is pneumatically operated in association with the movement of the piston block 7, and the piston block 7 has two operating states: active and passive:

[0046] Passive type: First of all, it should be explained that: when the piston block 7 moves to the position corresponding to the air vent 16, the water injection pump starts to start, thereby spraying cold water mist through the circulation support pipe 3. The purpose of this is to complete the local heat dissipation of the hot air flow with the lowest cold water consumption. On the contrary, when the pressure difference formed on the upper and lower sides of the piston block 7 is not enough to compress the connecting spring 15, the piston block 7 is reset to re-close the return air pipe 9;

[0047] Active: In this state, the displayed value on the temperature sensor 5 is used as the basis, and the temperature upper limit on the fan cover 2 is set according to the operating location of the centrifugal fan. When the displayed value on the temperature sensor 5 is higher than the temperature upper limit, there is no need to directly consider the moving position of the piston block 7, but directly send a start command to the electric push rod 14. Specifically, the active lever 13 is used to drive the piston block 7 to move in the direction close to the vent 16, so as to directly circulate the hot air flow.

[0048] In combination with the above content, it needs to be explained again that the function of the electromagnetic induction component 17 is to sense the moving position of the piston block 7. Its essence can be referred to the electromagnetic sensor on the current automatic conveyor belt. Then, the local position on the piston block 7 needs to be provided with a receiving component corresponding to the electromagnetic sensor. Therefore, the electromagnetic induction component in the present invention can be understood as: a transmitter and a receiver. The transmitter is installed at the corresponding position on the return air pipe 9, and the receiver is installed at a local position on the piston block 7.

[0049] To sum up: for the heat dissipation process of the fan cover in the centrifugal fan, the key is to carry out centralized heat dissipation at the air inlet position of the centrifugal fan. Specifically, a gravity heat dissipation method is formed based on the "power" of the airflow during the operation of the centrifugal fan, and an atomized spray heat dissipation method is used. Its essence is to limit the structural shape of the choke cone cap sleeve and utilize the principle of negative pressure formation to form a "double-layer space" with a pressure difference between the inside of the choke cone cap sleeve and the inside of the fan cover. The temperature sensor is used to detect the airflow temperature inside the fan cover in real time, and the continuously formed negative pressure environment is used. On the basis of not interfering with the airflow direction inside the fan cover, an intermittent gravity heat dissipation method is formed by adding a detachable structure to the conventional centrifugal fan structure.

[0050] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A centrifugal fan with a heat dissipation optimization structure, comprising a motor assembly (1), a fan cover (2) and a centrifugal impeller (6), characterized in that: The centrifugal impeller (6) is rotatably mounted at an inner position of the fan cover (2) via a motor assembly (1); a heat dissipation assembly is provided at an air inlet of the fan cover (2); the heat dissipation assembly comprises a mounting sleeve (4), a flow-blocking cone cap sleeve (10), a circulation support pipe (3) and a return air pipe (9); the center points of the mounting sleeve (4), the flow-blocking cone cap sleeve (10) and the centrifugal impeller (6) are located on the same horizontal axis; and a temperature sensor (5) is installed on the fan cover (2); The return air pipe (9) is mounted at the center point of the flow-blocking cone cap sleeve (10); the flow-blocking cone cap sleeve (10) is open along one end close to the centrifugal impeller (6); the circulation support pipe (3) is mounted on the mounting sleeve (4) and the flow-blocking cone cap sleeve (10); a rubber paddle (12) is mounted at an inner position of the flow-blocking cone cap sleeve (10); a flaring cap (8) is arranged at an end position of the return air pipe (9) corresponding to the center point of the centrifugal impeller (6); and a water injection pump corresponding to the circulation support pipe (3) is arranged outside the fan cover (2).

2. A centrifugal fan with a heat dissipation optimization structure according to claim 1, characterized in that: The flow-blocking cone cap sleeve (10) is provided with a flow-reducing portion and a flow-increasing portion at the installation position corresponding to the rubber paddle (12), the flow-reducing portion being provided at a position close to the installation sleeve (4), and the flow-increasing portion being provided at a position close to the centrifugal impeller (6); The cross section of the flow-reducing portion of the flow-blocking cone cap sleeve (10) is in the shape of an inverted cone along the direction from the centrifugal impeller (6) to the mounting sleeve (4), and the cross section of the flow-increasing portion of the flow-blocking cone cap sleeve (10) is in the shape of a truncated cone along the direction from the centrifugal impeller (6) to the mounting sleeve (4).

3. The centrifugal fan with a heat dissipation optimization structure according to claim 1, characterized in that: One end of the circulation support pipe (3) is connected to the output end of the water injection pump, and the other end of the circulation support pipe (3) is arranged at an internal position of the flow-blocking cone cap sleeve (10) and is equipped with an atomizing nozzle, wherein the arrangement position of the atomizing nozzle corresponds to the downflow portion.

4. The centrifugal fan with a heat dissipation optimization structure according to claim 1, characterized in that: A cooperative blade group (11) is rotatably mounted on the return air pipe (9) at a position corresponding to the flow increase portion, the outer edge of the cooperative blade group (11) is slidably connected to the inner wall of the flow blocking cone cap sleeve (10), and the cross section of the rubber paddle (12) is in the shape of an upwardly curved arch in a direction pointing toward the centrifugal impeller (6).

5. The centrifugal fan with a heat dissipation optimization structure according to claim 1, characterized in that: One end of the return air pipe (9) corresponding to the expansion cap (8) is in an open shape, and a venting port (16) is provided at a position of the return air pipe (9) corresponding to the downflow portion, and an electromagnetic induction component (17) is provided at a position of the return air pipe (9) corresponding to the venting port (16).

6. The centrifugal fan with a heat dissipation optimization structure according to claim 5, characterized in that: A piston block (7) is slidably mounted on the inner wall of the return air pipe (9) corresponding to the air release port (16), and a connecting spring (15) is mounted between the piston block (7) and the bottom end of the inner wall of the return air pipe (9).

7. The centrifugal fan with a heat dissipation optimization structure according to claim 6, characterized in that: An electric push rod (14) is installed at an external position of the blocking cone cap sleeve (10) corresponding to the mounting sleeve (4), and an active lever (13) is installed at the output end of the electric push rod (14). The active lever (13) extends into the interior of the return air pipe (9) and penetrates the piston block (7), and the active lever (13) and the piston block (7) are slidably connected.

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