Energy-saving exhaust system of fan

Abstract

The utility model relates to the technical field of exhaust systems, in particular to a fan energy-saving exhaust system which comprises an energy-saving fan, a control cabinet, an air inlet pipe, an exhaust pipe and a flow meter. A key signal for regulation and control comes from flow signal data of a flow meter in an air inlet pipe, when medium gas is conveyed, the flow meter installed in the air inlet pipe carries out real-time monitoring and obtains flow data of the medium gas, data signals are fed back to a control cabinet, the data are linked with a frequency converter through the control cabinet, frequency modulation control is carried out, and the medium gas is conveyed through the frequency converter. And the frequency modulation signal is fed back to the energy-saving fan, so that the rotating speed of the energy-saving fan is adjusted, the flow of the medium gas conveyed by the fan is adjusted, and the energy-saving effect of the fan is achieved. The problems that an existing fan does not have an energy-saving effect on medium gas conveying and is high in operation energy consumption are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust systems, in particular to a fan energy-saving exhaust system. Background Art

[0002] At present, in the conditions of other corrosive media gases such as biomedicine, pesticides and fine chemicals, fans made of carbon steel, stainless steel, metal-lined composite materials and other materials are not enough to meet the anti-corrosion and anti-leakage requirements of on-site gas transportation. At this time, FRP fans have been widely used in the above industries due to their excellent media corrosion resistance, low leakage rate and light weight.

[0003] However, fans controlled by fixed frequency and variable frequency through pressure sensing do not have the energy-saving effect that fans should have when conveying medium gas, and their operating energy consumption is relatively high.

[0004] The fan is controlled at a fixed frequency to operate at rated or set power, usually at full load and unadjustable, at which time the operating energy consumption is high.

[0005] As for the method of feeding back pressure signals to the fan inverter through pressure sensing, since the pressure value set on site is usually more than 1 mbar higher than the actual value, the fan may have a higher air volume or higher overall operating power during actual operation, and the fan energy consumption may be generally high. It may even cause abnormal fan flow regulation due to large fluctuations in the monitored pressure value (such as abnormal or erroneous numerical display caused by instrument damage, malfunction or other reasons), resulting in unclear equipment operation and energy consumption. Utility Model Content

[0006] The utility model aims to provide a fan energy-saving exhaust system, aiming to solve the problem that the existing fan has no energy-saving effect in conveying medium gas and has high operating energy consumption.

[0007] To achieve the above-mentioned purpose, the utility model provides a fan energy-saving exhaust system, including an energy-saving fan, a control cabinet, an air inlet duct, an exhaust duct and a flow meter, the control cabinet having a frequency converter, the frequency converter being located in the control cabinet, the exhaust duct being connected to the energy-saving fan and being located on one side of the energy-saving fan, the air inlet duct being connected to the energy-saving fan and being located on one side of the energy-saving fan, the flow meter being fixedly connected to the air inlet duct and being located in the air inlet duct, and the control cabinet being connected to the energy-saving fan.

[0008] The energy-saving fan comprises a fan housing, a variable frequency motor and a fan impeller. The variable frequency motor is fixedly connected to the fan housing and is located inside the fan housing. The fan impeller is arranged on one side of the variable frequency motor.

[0009] Among them, the fan impeller includes an impeller body, a sleeve and an anti-slip nut, the sleeve is arranged on the output end of the variable frequency motor, the impeller body is arranged on one side of the sleeve, and the anti-slip nut is threadedly connected to the output end of the variable frequency motor and is located on the side of the variable frequency motor close to the sleeve.

[0010] Wherein, the fan energy-saving exhaust system also includes a heat sink, and the heat sink is arranged on one side of the control cabinet.

[0011] Among them, the heat dissipation component includes a cooling fan, a dust cover and a dust removal brush. The cooling fan is arranged on one side of the control cabinet, the dust cover is fixedly connected to the control cabinet and is located close to the cooling fan, and the dust removal brush is slidably connected to the dust cover and is located outside the dust cover.

[0012] The utility model is a fan energy-saving exhaust system, wherein the air inlet pipe is used to introduce corrosive medium gas into the energy-saving fan, and the exhaust pipe is used to introduce the corrosive medium gas exhausted by the energy-saving fan into the exhaust gas treatment device for treatment. The key signal for its regulation and control comes from the flow signal data of the flow meter (FIQ) in the air inlet pipe. When the medium gas is transported, the flow meter installed in the air inlet pipe performs real-time monitoring and obtains the medium gas flow data, and feeds back the data signal to the control cabinet. The control cabinet then interlocks the data with the frequency converter for frequency modulation control, so that the frequency modulation signal is fed back to the energy-saving fan, and then the speed of the energy-saving fan is adjusted to achieve the regulation of the medium gas flow rate transported by the fan, thereby obtaining the energy-saving effect of the fan. The utility model solves the problem that the existing fan has no energy-saving effect in transporting medium gas and has high operating energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0014] Figure 1 It is a connection diagram of a fan energy-saving exhaust system according to the first embodiment of the utility model.

[0015] Figure 2 It is a schematic diagram of the side cut structure of an energy-saving fan of a fan energy-saving exhaust system in the first embodiment of the utility model.

[0016] Figure 3 It is a schematic diagram of the connection between the output end of a variable frequency motor and a shaft sleeve of a fan energy-saving exhaust system in the first embodiment of the utility model.

[0017] Figure 4 It is a cross-sectional view of a fan energy-saving exhaust system along the heat sink direction according to the second embodiment of the utility model.

[0018] In the figure: 101-control cabinet, 102-frequency converter, 103-exhaust duct, 104-air inlet duct, 105-flow meter, 106-fan casing, 107-frequency converter motor, 108-impeller body, 109-shaft sleeve, 110 anti-drop nut, 201-cooling fan, 202-dust cover, 203-dust brush. DETAILED DESCRIPTION

[0019] The first embodiment of the present application is:

[0020] See also Figure 1-Figure 3 , Figure 1 This is a connection diagram of this utility. Figure 2 This is a schematic diagram of the side cut structure of the energy-saving fan of the utility model. Figure 3 It is a schematic diagram of the connection between the output end of the variable frequency motor and the shaft sleeve of the utility model. The fan energy-saving exhaust system in this embodiment includes an energy-saving fan, a control cabinet 101, a frequency converter 102, an exhaust duct 103, an air inlet duct 104 and a flow meter 105. The control cabinet 101 has a frequency converter 102. The energy-saving fan includes a fan casing 106, a variable frequency motor 107 and a fan impeller. The fan impeller includes an impeller body 108, a shaft sleeve 109 and an anti-slip nut 110. The above-mentioned scheme solves the problem that the existing fan has no energy-saving effect in conveying medium gas and has high operating energy consumption. It can be understood that the above-mentioned scheme can be used in the scenario of energy-saving emission of corrosive exhaust gas.

[0021] According to this specific implementation, the frequency converter 102 is located in the control cabinet 101, the exhaust pipe 103 is connected to the energy-saving fan and is located on one side of the energy-saving fan, the exhaust pipe 103 is connected to the energy-saving fan and is located on one side of the energy-saving fan, the flow meter 105 is fixedly connected to the air inlet pipe 104 and is located in the exhaust pipe 103, the control cabinet 101 is connected to the energy-saving fan, the air inlet pipe 104 is used to introduce corrosive medium gas into the energy-saving fan, the exhaust pipe 103 is used to introduce the corrosive medium gas discharged by the energy-saving fan into the exhaust gas treatment device for treatment, the energy-saving fan and the control cabinet 101 The frequency converter 102 (VFD) in the air inlet pipe 104 performs frequency conversion signal interlocking and regulation control. The key signal of the regulation control comes from the flow signal data of the flow meter 105 (FIQ) in the air inlet pipe 104. When the medium gas is transported, the flow meter 105 installed in the air inlet pipe 104 performs real-time monitoring and obtains the medium gas flow data, and feeds back the data signal to the control cabinet 101. The control cabinet 101 then interlocks the data with the frequency converter 102 for frequency modulation control, so that the frequency modulation signal is fed back to the energy-saving fan, and then adjusts the speed of the energy-saving fan to achieve the regulation of the medium gas flow transported by the fan, thereby achieving the energy-saving effect of the fan. Solve the problem that the existing fan has no energy-saving effect in transporting medium gas and has high operating energy consumption.

[0022] Among them, the variable frequency motor 107 is fixedly connected to the fan casing 106 and is located in the fan casing 106. The fan impeller is arranged on one side of the variable frequency motor 107. The variable frequency motor 107 is connected to the inverter 102 (VFD) in the control cabinet 101 through a wire to perform variable frequency signal interlocking and adjustment control, thereby adjusting the fan impeller speed. The fan casing 106 provides installation and support conditions for the variable frequency motor 107 and protects the variable frequency motor 107. The fan impeller and the fan casing 106 are both made of fiberglass.

[0023] Secondly, the shaft sleeve 109 is sleeved on the output end of the variable frequency motor 107, the impeller body 108 is arranged on one side of the shaft sleeve 109, the anti-slip nut 110 is threadedly connected to the output end of the variable frequency motor 107, and is located on the side of the variable frequency motor 107 close to the shaft sleeve 109. The shaft sleeve 109 and the anti-slip nut 110 are used together to fix the impeller body 108 on the output end of the variable frequency motor 107.

[0024] When the medium gas is being transported, the flow meter 105 installed in the air inlet pipe 104 performs real-time monitoring and obtains medium gas flow data, and feeds back the data signal to the control cabinet 101. The control cabinet 101 then links the data with the frequency converter 102 for frequency modulation control, so that the frequency modulation signal is fed back to the frequency conversion motor 107, thereby adjusting the speed of the fan impeller to achieve the adjustment of the medium gas flow transported by the fan. Finally, the exhaust pipe 103 is used to introduce the corrosive medium gas discharged from the fan impeller into the exhaust gas treatment device for treatment.

[0025] The second embodiment of the present application is:

[0026] Based on the first embodiment, please refer to Figure 4 , Figure 4 The fan energy-saving exhaust system of this embodiment further comprises a heat dissipation element, and the heat dissipation element comprises a heat dissipation fan 201 , a dust cover 202 and a dust removal brush 203 .

[0027] According to this specific embodiment, the heat sink is arranged on one side of the control cabinet 101, and the heat sink is arranged to perform air cooling on the control cabinet 101 body to prevent the control cabinet 101 from operating for a long time and causing the internal temperature to rise, thereby accelerating the aging of components.

[0028] Among them, the cooling fan 201 is arranged on one side of the control cabinet 101, the dust cover 202 is fixedly connected to the control cabinet 101 and is located close to the cooling fan 201, the dust removal brush 203 is slidably connected to the dust cover 202 and is located on the outside of the dust cover 202, and a temperature sensor is preset inside the control cabinet 101. When the temperature sensor detects that the temperature inside the control cabinet 101 reaches a preset value, the controller controls the cooling fan 201 to operate and blow air to perform air cooling on the components in the control cabinet 101. The dust cover 202 is set to prevent the cooling fan 201 from sucking in dust when blowing air, and the dust removal brush 203 is used to clean the dust on the dust cover 202 to prevent dust clogging from affecting the heat dissipation effect of the control cabinet 101.

[0029] When the heat sink is in use, the cooling fan 201 blows air to cool the components in the control cabinet 101. The dust cover 202 prevents the cooling fan 201 from sucking in dust when blowing air. The dust removal brush 203 is used to clean the dust on the dust cover 202 to prevent dust clogging from affecting the heat dissipation effect of the control cabinet 101.

[0030] The above disclosure is only a preferred embodiment of a fan energy-saving exhaust system of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A fan energy-saving exhaust system, characterized in that: It includes an energy-saving fan, a control cabinet, an air inlet duct, an exhaust duct and a flow meter. The control cabinet has a frequency converter, and the frequency converter is located in the control cabinet. The exhaust duct is connected to the energy-saving fan and is located on one side of the energy-saving fan. The air inlet duct is connected to the energy-saving fan and is located on one side of the energy-saving fan. The flow meter is fixedly connected to the air inlet duct and is located in the air inlet duct. The control cabinet is connected to the energy-saving fan.

2. A fan energy-saving exhaust system according to claim 1, characterized in that: The energy-saving fan comprises a fan housing, a variable frequency motor and a fan impeller. The variable frequency motor is fixedly connected to the fan housing and is located inside the fan housing. The fan impeller is arranged on one side of the variable frequency motor.

3. A fan energy-saving exhaust system as claimed in claim 2, characterized in that: The fan impeller includes an impeller body, a shaft sleeve and an anti-slip nut. The shaft sleeve is sleeved on the output end of the variable frequency motor, the impeller body is arranged on one side of the shaft sleeve, and the anti-slip nut is threadedly connected to the output end of the variable frequency motor and is located on the side of the variable frequency motor close to the shaft sleeve.

4. A fan energy-saving exhaust system as claimed in claim 3, characterized in that: The fan energy-saving exhaust system also includes a heat sink, which is arranged on one side of the control cabinet.

5. A fan energy-saving exhaust system as claimed in claim 4, characterized in that: The heat dissipation component includes a cooling fan, a dust cover and a dust removal brush. The cooling fan is arranged on one side of the control cabinet. The dust cover is fixedly connected to the control cabinet and is located close to the cooling fan. The dust removal brush is slidably connected to the dust cover and is located outside the dust cover.

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