Novel induced draft fan with defrosting structure

Abstract

The utility model relates to the field of induced draft fans, in particular to a novel induced draft fan with a defrosting structure, which comprises a circular shell, a circular support and an induced air outlet. A circular support used for containing the defrosting structure is arranged below the circular shell, and an air inducing outlet used for airflow to flow out is formed between the circular support and the circular shell. The impeller rotates to drive airflow to penetrate through the circular support and flow out of the air inducing outlet, in the process, under the action of the temperature sensor, when the environment temperature is lower than a certain threshold value, the heating coil starts to dissipate heat through driving of the heating driver, so that a frost layer is melted or prevented from being formed, and the frost layer is prevented from being formed. Therefore, the problems of pipeline frost cracking and the like caused by frost can be avoided, continuous and stable operation of equipment is guaranteed, the overall operation efficiency is improved, meanwhile, heat is introduced to prevent frosting or quickly remove a formed frost layer, and the method is of great importance to preventing equipment faults, improving the equipment efficiency and prolonging the service life in winter or a cold environment.

Description

Technical Field

[0001] The utility model relates to the field of induced draft fans, in particular to a novel induced draft fan with a defrosting structure. Background Art

[0002] An induced draft fan is a device that generates negative pressure through the rotation of an impeller and then extracts air from a system (equipment). It is generally installed at the end of a boiler to extract hot flue gas from the furnace, ensuring the smooth progress of the combustion process and the effective discharge of waste gas. Induced draft fans are widely used in fields such as factories, buildings, and mines, such as ventilation and air change, air purification, waste gas discharge, and material transportation. It can effectively improve air quality and ensure the flow of indoor and outdoor air. It is widely used in industries such as electric power, metallurgy, chemical industry, and building materials. A novel induced draft fan is an induced draft fan device with innovations in design and function.

[0003] During the use of existing induced draft fans, when the ambient temperature is lower than the dew point temperature, frost may form on the blades or the surface of the heat exchanger of the induced draft fan. The formation of the frost layer will increase the thermal resistance, resulting in a decrease in the heat transfer efficiency, thus affecting the performance and efficiency of the induced draft fan. At the same time, the accumulation of the frost layer will block the air flow channel, reducing the effective ventilation area, and further reducing the air volume and air pressure of the induced draft fan. This may lead to poor air flow in the system and affect the overall operation effect.

[0004] Therefore, in view of the above problems that when the ambient temperature is lower than the dew point temperature during the use of existing induced draft fans, frost may form on the blades or the surface of the heat exchanger of the induced draft fan. The formation of the frost layer will increase the thermal resistance, and at the same time, the accumulation of the frost layer will block the air flow channel, thus affecting the operation effect and performance of the induced draft fan, a novel induced draft fan with a defrosting structure can be designed. A heating structure is arranged inside the induced draft fan to achieve the purpose of defrosting the induced draft fan. Summary of the Utility Model

[0005] In order to overcome the problems that when the ambient temperature is lower than the dew point temperature during the use of existing induced draft fans, frost may form on the blades or the surface of the heat exchanger of the induced draft fan. The formation of the frost layer will increase the thermal resistance, and at the same time, the accumulation of the frost layer will block the air flow channel, thus affecting the operation effect and performance of the induced draft fan.

[0006] The technical solution of the utility model is: a novel induced draft fan with a defrosting structure, including a circular shell, a circular support, and an air outlet for induced draft; a circular support for placing the defrosting structure is arranged below the circular shell. An air outlet for air flow to flow out is formed between the circular support and the circular shell. An annular plate is installed inside the circular support, a heating coil is installed inside the annular plate, and a heating driver connected to the heating coil is installed on one side outside the circular support.

[0007] Preferably, the rotation of the impeller drives the air flow to pass through the circular support and flow out through the air outlet. During this process, under the action of the temperature sensor, when the ambient temperature is lower than a certain threshold, the heating coil starts to emit heat under the drive of the heating driver to melt or prevent the formation of frost layer. By this method, problems such as pipeline cracking caused by frost can be avoided, ensuring the continuous and stable operation of the equipment, improving the overall operation efficiency, and introducing heat to prevent frosting or quickly remove the formed frost layer, which is crucial for preventing equipment failures, improving equipment efficiency, and extending the service life in winter or cold environments.

[0008] Preferably, a top cover is provided above the circular housing. A deflector is installed at the upper end of the top cover, and a wind baffle is installed at the lower edge of the top cover. An annular chute is provided above the circular housing. While the air intake motor is operating, since the annular slide plate can drive the top cover to rotate and connect with the circular housing along the annular chute, the deflector drives the wind baffle to rotate under the action of the external air flow, making the air outlet face the flow direction of the external air flow. Thus, when encountering a strong cold crosswind, the wind baffle can block the strong cold crosswind and prevent it from flowing back into the chimney along the air outlet, preventing reverse smoke.

[0009] Preferably, an annular slide plate is installed corresponding to the annular chute at the lower end of the top cover. A rotating shaft is installed in the middle of the top cover, and an air intake motor is installed in the middle of the rotating shaft. Three groups of impellers are installed around the lower end of the rotating shaft. Driven by the air intake motor, the rotating shaft drives the impellers to rotate to form wind power. Then the air flow passes through the circular support and flows out through the air outlet, which can enhance the suction of the air intake motor.

[0010] Preferably, multiple groups of heat dissipation holes for ventilation and heat dissipation are provided around the outside of the circular housing. Three groups of arc-shaped connecting plates are installed around the lower edge of the circular housing. A fixing bolt passes through the middle of the arc-shaped connecting plates, and nuts are sleeved on the outer ends of both ends of the fixing bolt. First, pick up the arc-shaped mounting plate and place it in contact with the arc-shaped connecting plate. Then the fixing bolt passes through the mounting hole and is fixed to the arc-shaped connecting plate, and then tightened and fixed by the nut to be used. During the operation of the air intake motor, ventilation and heat dissipation can be carried out through the heat dissipation holes to avoid heat accumulation inside the circular housing and affect the service life of the air intake motor.

[0011] Preferably, an arc-shaped mounting plate is installed corresponding to the arc-shaped connecting plate at the upper edge of the circular support. A mounting hole for the fixing bolt to pass through is provided on the arc-shaped mounting plate. The fixing bolt passes through the mounting hole and is fixed to the arc-shaped connecting plate, and then tightened and fixed by the nut to be used, improving the stability of the air intake fan.

[0012] Preferably, a temperature sensor fixedly connected to the circular support is provided on one side of the heating driver. When the ambient temperature is lower than a certain threshold, the heating coil starts to generate heat under the drive of the heating driver to melt or prevent the formation of frost layers.

[0013] Preferably, the heating driver is electrically connected to the temperature sensor. During the operation of the induced draft fan, the ambient temperature is detected through the function of the temperature sensor.

[0014] Advantages of the present utility model:

[0015] 1. Through the rotation of the impeller, the air flow is driven to pass through the circular support and flow out through the induced draft outlet. During this process, through the function of the temperature sensor, when the ambient temperature is lower than a certain threshold, the heating coil starts to generate heat under the drive of the heating driver to melt or prevent the formation of frost layers. By this method, problems such as pipeline freezing caused by frost can be avoided, thus ensuring the continuous and stable operation of the equipment, improving the overall operation efficiency, and at the same time introducing heat to prevent frosting or quickly removing the formed frost layer, which is crucial for preventing equipment failures, improving equipment efficiency, and extending the service life in winter or cold environments;

[0016] 2. While the induced draft motor is operating, since the annular slide plate can drive the top cover to rotate and be connected to the circular housing along the annular chute, the guide plate drives the wind deflector to rotate under the action of the external air flow, so that the induced draft outlet faces the direction of the external air flow. Thus, when encountering strong cold cross winds, the wind deflector can block the strong cold cross winds and prevent them from flowing back into the chimney along the induced draft outlet, preventing backdraft;

[0017] 3. During the operation of the induced draft fan, the ambient temperature is monitored through the function of the temperature sensor. When the ambient temperature is lower than a certain threshold, the heating coil starts to generate heat under the drive of the heating driver to melt or prevent the formation of frost layers. Description of the Drawings

[0018] Figure 1 Shows the overall structural schematic diagram of the induced draft fan of the present utility model;

[0019] Figure 2 Shows the structural schematic diagram of the wind deflector of the induced draft fan of the present utility model;

[0020] Figure 3 Shows the structural schematic diagram of the impeller of the induced draft fan of the present utility model;

[0021] Figure 4 Shows the structural schematic diagram of the circular support of the induced draft fan of the present utility model.

[0022] Description of the reference numerals: 1, circular housing; 2, circular support; 3, air outlet; 101, deflector; 102, top cover; 103, windshield; 104, annular slide plate; 105, rotating shaft; 106, air induction motor; 107, impeller; 108, heat dissipation holes; 109, arc-shaped connecting plate; 110, fixing bolts; 111, nuts; 112, annular chute; 201, arc-shaped mounting plate; 202, mounting holes; 203, annular plate; 204, heating coil; 205, heating driver; 206, temperature sensor. Detailed implementation manners

[0023] The present utility model will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please refer to Figures 1 - 4 , the present utility model provides an embodiment: a new type of air induction fan with a defrosting structure, including a circular housing 1, a circular support 2 and an air outlet 3; a circular support 2 for placing the defrosting structure is provided below the circular housing 1, and an air outlet 3 for the air flow to flow out is formed between the circular support 2 and the circular housing 1. An annular plate 203 is installed inside the circular support 2, a heating coil 204 is installed inside the annular plate 203, and a heating driver 205 (the model of the heating driver 205 is AQMD6030BLS-E3) connected to the heating coil 204 is installed on one side outside the circular support 2.

[0025] Please refer to Figures 2 - 3, in this embodiment, a top cover 102 is provided above the circular housing 1. A flow guide plate 101 is installed at the upper end of the top cover 102, and a wind shield 103 is installed at the lower edge of the top cover 102. An annular chute 112 is formed above the circular housing 1. While the air induction motor 106 is operating, since the annular sliding plate 104 can drive the top cover 102 to be rotatably connected to the circular housing 1 along the annular chute 112, the flow guide plate 101 drives the wind shield 103 to rotate under the action of the external air flow, so that the air induction outlet 3 faces the direction of the external air flow. Thus, when encountering a strong cold cross wind, the wind shield 103 can block the strong cold cross wind and prevent it from flowing back into the chimney along the air induction outlet 3, preventing reverse smoke. An annular sliding plate 104 is installed corresponding to the annular chute 112 at the lower end of the top cover 102. A rotating shaft 105 is installed in the middle of the top cover 102, and an air induction motor 106 is installed in the middle of the rotating shaft 105. Three groups of impellers 107 are installed around the lower end of the rotating shaft 105. Driven by the air induction motor 106, the rotating shaft 105 drives the impellers 107 to rotate to form wind power. Then the air flow passes through the circular support 2 and flows out through the air induction outlet 3, which can enhance the suction of the air induction motor 106. Multiple groups of heat dissipation holes 108 for ventilation and heat dissipation are formed around the outside of the circular housing 1. Three groups of arc-shaped connecting plates 109 are installed around the lower edge of the circular housing 1. A fixing bolt 110 passes through the middle of the arc-shaped connecting plate 109, and nuts 111 are sleeved on the outer parts of both ends of the fixing bolt 110. First, pick up the arc-shaped mounting plate 201, place it in fit with the arc-shaped connecting plate 109, then the fixing bolt 110 passes through the mounting hole 202 and is fixedly connected to the arc-shaped connecting plate 109, and then it is tightened and fixed by the nut 111 to be used. During the operation of the air induction motor 106, ventilation and heat dissipation can be carried out through the heat dissipation holes 108 to avoid heat accumulation inside the circular housing 1 and affect the service life of the air induction motor 106.

[0026] Please refer to Figure 4 , in this embodiment, an arc-shaped mounting plate 201 is installed corresponding to the arc-shaped connecting plate 109 at the upper edge of the circular support 2. A mounting hole 202 for the fixing bolt 110 to pass through is formed on the arc-shaped mounting plate 201. The fixing bolt 110 passes through the mounting hole 202 and is fixedly connected to the arc-shaped connecting plate 109, and then it is tightened and fixed by the nut 111 to be used, which improves the stability of the air induction fan. A temperature sensor 206 (the model of the temperature sensor 206 is JASUN-M12) fixedly connected to the circular support 2 is provided on one side of the heating driver 205. When the ambient temperature is lower than a certain threshold, the heating coil 204 starts to emit heat under the drive of the heating driver 205 to melt or prevent the formation of frost. The heating driver 205 is electrically connected to the temperature sensor 206. During the operation of the air induction fan, the surrounding ambient temperature is monitored through the action of the temperature sensor 206.

[0027] When working, first pick up the arc-shaped mounting plate 201 and place it in contact with the arc-shaped connecting plate 109. Then, the fixing bolt 110 passes through the mounting hole 202 and is fixedly connected to the arc-shaped connecting plate 109, and then tightened and fixed by the nut 111, and it can be used. First, driven by the air induction motor 106, the rotating shaft 105 drives the impeller 107 to rotate to form wind power. Then, the air flow passes through the circular support 2 and flows out through the air induction outlet 3. During the operation of the air induction motor 106, ventilation and heat dissipation can be carried out through the heat dissipation holes 108 to avoid heat accumulation inside the circular housing 1;

[0028] While the air induction motor 106 is operating, since the annular slide plate 104 can drive the top cover 102 to be rotatably connected to the circular housing 1 along the annular chute 112, the deflector 101 drives the wind shield 103 to rotate under the action of the external air flow, so that the air induction outlet 3 faces the flow direction of the external air flow. Thus, when encountering a strong cold crosswind, the wind shield 103 can block the strong cold crosswind and prevent it from flowing back into the chimney along the air induction outlet 3, preventing backdraft;

[0029] During the operation of the air induction fan, the surrounding environment temperature is detected through the action of the temperature sensor 206. When the environment temperature is lower than a certain threshold value, the heating coil 204 starts to emit heat under the drive of the heating driver 205 to melt or prevent the formation of frost layer.

[0030] Through the above steps, the rotation of the impeller 107 drives the air flow to pass through the circular support 2 and flow out through the air induction outlet 3. During this process, through the action of the temperature sensor 206, when the environment temperature is lower than a certain threshold value, the heating coil 204 starts to emit heat under the drive of the heating driver 205 to melt or prevent the formation of frost layer. By this method, problems such as pipeline freezing caused by frost can be avoided, thereby ensuring the continuous and stable operation of the equipment, improving the overall operation efficiency, and at the same time introducing heat to prevent frosting or quickly removing the formed frost layer, which is crucial for preventing equipment failures, improving equipment efficiency and extending service life in winter or cold environments, so as to solve the problem that when the environment temperature is lower than the dew point temperature during the use of the existing air induction fan, frost may form on the blades or the surface of the heat exchanger of the air induction fan, the formation of the frost layer will increase the thermal resistance, and at the same time the accumulation of the frost layer will block the air flow channel, thus affecting the operation effect and performance of the air induction fan.

Claims

1. A new type of induced draft fan with a defrosting structure, including a circular housing (1); characterized in that: It also includes a circular support (2) and an air outlet (3); a circular support (2) for placing the defrosting structure is provided below the circular housing (1), and an air outlet (3) for air flow to flow out is formed between the circular support (2) and the circular housing (1). An annular plate (203) is installed inside the circular support (2), a heating coil (204) is installed inside the annular plate (203), and a heating driver (205) connected to the heating coil (204) is installed on one side of the outside of the circular support (2).

2. The novel induced draft fan with a defrosting structure according to claim 1, characterized in that: A top cover (102) is provided above the circular housing (1), a deflector (101) is installed at the upper end of the top cover (102), a wind baffle (103) is installed at the lower edge of the top cover (102), and an annular chute (112) is opened above the circular housing (1).

3. The novel induced draft fan with a defrosting structure according to claim 2, characterized in that: An annular sliding plate (104) is installed at the lower end of the top cover (102) corresponding to the annular chute (112), a rotating shaft (105) is installed in the middle of the top cover (102), an air guiding motor (106) is installed in the middle of the rotating shaft (105), and three groups of impellers (107) are installed around the lower end of the rotating shaft (105).

4. A novel induced draft fan with a defrosting structure according to claim 1, characterized in that: A plurality of groups of heat dissipation holes (108) for ventilation and heat dissipation are opened around the outside of the circular housing (1), three groups of arc-shaped connecting plates (109) are installed around the lower edge of the circular housing (1), a fixing bolt (110) passes through the middle of the arc-shaped connecting plate (109), and nuts (111) are sleeved on the outer parts of both ends of the fixing bolt (110).

5. The novel induced draft fan with a defrosting structure according to claim 4, characterized in that: Arc-shaped mounting plates (201) corresponding to the arc-shaped connecting plates (109) are installed at the upper edge of the circular support (2), and mounting holes (202) for the fixing bolts (110) to pass through are opened on the arc-shaped mounting plates (201).

6. The novel induced draft fan with a defrosting structure according to claim 1, characterized in that: A temperature sensor (206) fixedly connected to the circular support (2) is provided on one side of the heating driver (205).

7. A novel induced draft fan with a defrosting structure according to claim 1, characterized in that: The heating driver (205) is electrically connected to the temperature sensor (206).

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