Centrifugal blower

Abstract

The utility model relates to air compression technical field especially, it relates to a centrifugal blower. In order to meet the use demand of user, the utility model provides a centrifugal blower, the centrifugal blower includes frequency converter and two centrifugal compression host machines that are in parallelly arranged in the installation in the machine case, the frequency converter is connected with the drive motor of centrifugal compression host machine, and the compression air outlet of centrifugal compression host machine is connected with the air outlet main pipe. The utility model centrifugal blower is provided with two centrifugal compression host machines that are in parallelly arranged, can satisfy the need of user in normal production and the reduction of production, avoids waste and the utility model centrifugal blower to appear damage or stoppage failure when operating to surge area, improves the production efficiency of user.

Description

Technical Field

[0001] This utility model relates to the field of air compression technology, and in particular to a centrifugal blower. Background Technology

[0002] Existing centrifugal blowers exhibit surge characteristics. When users reduce production, these blowers must release some compressed air into the atmosphere to meet user demands, resulting in energy waste and increased production costs. Furthermore, if users fail to perform partial venting in a timely manner, the existing centrifugal blowers may operate into the surge region, leading to damage, shutdown, and disruption to user production. Utility Model Content

[0003] To meet user needs, this utility model proposes a centrifugal blower, which includes a frequency converter installed in a casing and two centrifugal compressor units arranged in parallel. The frequency converter is connected to the drive motor of the centrifugal compressor unit, and the compressed air outlet of the centrifugal compressor unit is connected to the air outlet header. This utility model centrifugal blower features two centrifugal compressor units arranged in parallel. During normal production, both centrifugal compressor units can be operated simultaneously. When production is reduced, i.e., the load is low, only one centrifugal compressor needs to be operated to reduce the compressed air output. This avoids the waste caused by the centrifugal blower venting some compressed air into the atmosphere, and also avoids the centrifugal blower operating in the surge region due to venting operations. Therefore, it prevents damage or shutdown of the centrifugal blower caused by venting operations, thereby improving the user's production efficiency. In addition, the centrifugal blower of this utility model is equipped with two centrifugal compressors arranged in parallel, which can make the two centrifugal compressors redundant and avoid the centrifugal blower from stopping operation due to the failure of one of the centrifugal compressors, thus affecting the user's production.

[0004] Preferably, the compressed air outlet of the centrifugal compressor is connected to the main exhaust pipe via an exhaust pipe. Thus, the two centrifugal compressors in this centrifugal blower are each connected to the main exhaust pipe via exhaust pipes, allowing each compressor to deliver its produced compressed air to the main exhaust pipe, facilitating the supply of compressed air to the user via the main exhaust pipe. Furthermore, the exhaust pipe is equipped with a vent valve and a silencer. The vent valve is located inside the casing, and the silencer is located at the top of the casing and connected to the exhaust end of the vent valve. This allows the vent valve to be opened to release the compressed air inside the centrifugal blower into the atmosphere during shutdown, preventing backflow and damage. The compressed air discharged through the vent valve passes through the silencer for noise reduction, thus minimizing the operating noise of the centrifugal blower.

[0005] Preferably, the chassis includes a coolant tank and a cooling pump. The coolant tank is located at the bottom of the chassis. The inlet of the cooling pump is connected to the outlet of the coolant tank, the outlet of the cooling pump is connected to the cooling inlet of the frequency converter, the cooling outlet of the frequency converter is connected to the cooling inlet of the centrifugal compressor, and the cooling outlet of the centrifugal compressor is connected to the return port of the coolant tank. This arrangement of the coolant tank and cooling pump within the chassis allows the coolant stored in the tank to be sequentially delivered to the frequency converter and the centrifugal compressor, thereby cooling them and preventing overheating of the frequency converter or centrifugal compressor from affecting the operation of the centrifugal blower. Furthermore, the coolant tank is located to the side of the centrifugal compressor, and the cooling pump is located above the coolant tank. This design avoids interference between the coolant tank and cooling pump and the centrifugal compressor, and facilitates the pumping of coolant from the tank to the inverter and centrifugal compressor, shortening the coolant circulation path and improving the cooling performance of the centrifugal blower. Furthermore, a cooler is installed between the centrifugal compressor and the coolant tank. The cooler's cooling inlet is connected to the cooling outlet on the centrifugal compressor, and its cooling outlet is connected to the return port on the coolant tank. During operation, the cooler cools the coolant discharged from the centrifugal compressor, improving its cooling effect and thus enhancing the overall cooling performance of the centrifugal blower. More preferably, the cooler is located at the edge of the casing and below the outlet end of the main exhaust pipe. This avoids interference between the cooler and the centrifugal compressor and coolant tank, and shortens the connecting pipes between them.

[0006] Preferably, the frequency converter is a silicon carbide frequency converter. In this way, using a silicon carbide frequency converter to control the drive motor of the centrifugal compressor can not only meet the frequency conversion requirements of the centrifugal compressor with a speed of up to 100,000 r / min, but also ensure stable operation of the centrifugal compressor, thereby improving the operational stability of the centrifugal blower of this invention.

[0007] Preferably, the centrifugal compressor is equipped with an air intake filter. This air intake filter removes dust, moisture, and other impurities from the air, improving the purity of the compressed air produced by the centrifugal blower of this invention. Attached Figure Description

[0008] Figure 1 This is a first-view structural schematic diagram of the centrifugal blower of this utility model; Figure 2 This is a second-view structural schematic diagram of the centrifugal blower of this utility model; Figure 3 This is a third-view structural schematic diagram of the centrifugal blower of this utility model. Detailed Implementation

[0009] Below, in conjunction with Figures 1 to 3 This article provides a detailed description of the centrifugal blower of this utility model.

[0010] like Figures 1 to 3As shown, the centrifugal blower of this invention includes a frequency converter 2 installed in a casing 1 and two centrifugal compressor units 3 arranged in parallel. The frequency converter 2 is connected to the drive motor (not shown in the figure) of the centrifugal compressor unit 3, and the compressed air outlet of the centrifugal compressor unit 3 is connected to the air outlet header 4. Tests have shown that the frequency conversion range of this centrifugal blower is 30%-100% higher than that of existing centrifugal blowers. Therefore, by incorporating two centrifugal compressor units 3 arranged in parallel, both units can be operated simultaneously during normal production. When production is reduced (i.e., the load is low), only one centrifugal compressor unit 3 needs to be operated to reduce compressed air production. This avoids the waste caused by the centrifugal blower releasing some compressed air into the atmosphere and also prevents the centrifugal blower from operating in the surge region due to venting operations. This prevents damage or shutdown of the centrifugal blower due to venting operations, thereby improving the user's production efficiency. Furthermore, the centrifugal blower of this invention features two centrifugal compressor units 3 arranged in parallel, providing redundancy between them and preventing the centrifugal blower from stopping operation due to a malfunction of one of the compressor units 3, thus avoiding disruption to the user's production. Preferably, the centrifugal compressor unit 3 is mounted on an air inlet box (not shown in the figure) located at the bottom of the casing 1 and connected to the air inlet box via an air inlet pipe (not shown in the figure). Preferably, the compressed air outlet of the centrifugal compressor unit 3 is connected to the air outlet header 4 via an air outlet pipe 31. In this way, the two centrifugal compressor units 3 in this invention are each connected to the air outlet header 4 via air outlet pipes 31, allowing the two centrifugal compressor units 3 to respectively deliver the produced compressed air to the air outlet header 4 through the air outlet pipes 31, thereby facilitating the supply of the produced compressed air to the user through the air outlet header. Preferably, the outlet pipe 31 is equipped with a vent valve 32 and a silencer 33. The vent valve 32 is located inside the casing 1, and the silencer 33 is located at the top of the casing 1 and connected to the outlet end of the vent valve 32. This allows the vent valve 32 to be opened to release the compressed air inside the centrifugal blower into the atmosphere when the machine is stopped, preventing backflow and damage to the centrifugal blower. The compressed air discharged through the vent valve 32 must pass through the silencer 33 for noise reduction, thus reducing the operating noise of the centrifugal blower. Preferably, the frequency converter 2 is a silicon carbide frequency converter. Using a silicon carbide frequency converter to control the drive motor of the centrifugal compressor 3 can meet the frequency conversion requirements of the centrifugal compressor 3, which has a speed of up to 100,000 r / min, while also ensuring stable operation of the centrifugal compressor 3, thereby improving the operational stability of the centrifugal blower. Preferably, the centrifugal compressor host 3 is provided with an air intake filter element 34 at the air intake end.Thus, by setting an air intake filter element 34 at the air intake end of the centrifugal compressor host 3, the air intake filter element 34 can filter out impurities such as dust and moisture in the air, thereby improving the purity of the compressed air produced by the centrifugal blower of this utility model.

[0011] like Figures 1 to 3 As shown, the centrifugal blower of this invention is equipped with a cooling system, which includes a coolant tank 51 and a cooling pump 52 disposed in the casing 1. The coolant tank 51 is located at the bottom of the casing 1. The inlet of the cooling pump 52 is connected to the outlet of the coolant tank 51, the outlet of the cooling pump 52 is connected to the cooling inlet of the frequency converter 2, the cooling outlet of the frequency converter 2 is connected to the cooling inlet of the centrifugal compressor 3, and the cooling outlet of the centrifugal compressor 3 is connected to the return port of the coolant tank 51. Thus, by setting up the coolant tank 51 and the cooling pump 52 in the casing 1, the coolant stored in the coolant tank 51 is sequentially transported to the frequency converter 2 and the centrifugal compressor 3 by the cooling pump 52, thereby dissipating heat and cooling the frequency converter 2 and the centrifugal compressor 3 sequentially, preventing the operation of the centrifugal blower of this invention from being affected by excessively high temperatures in the frequency converter 2 or the centrifugal compressor 3. Preferably, the coolant tank 51 is located to the side of the centrifugal compressor 3, and the cooling pump 52 is located above the coolant tank 51. This avoids interference between the coolant tank 51 and the cooling pump 52 and the centrifugal compressor 3, and facilitates the cooling pump 52 in drawing coolant from the coolant tank 51 and sequentially delivering it to the frequency converter 2 and the centrifugal compressor 3, shortening the coolant circulation path and improving the cooling and heat dissipation effect of the centrifugal blower. Preferably, the cooling system also includes a cooler 53, which is positioned between the centrifugal compressor 3 and the coolant tank 51. The cooling inlet of the cooler 53 is connected to the cooling outlet on the centrifugal compressor 3, and the cooling outlet of the cooler 53 is connected to the return port on the coolant tank 51. Thus, during the operation of the centrifugal blower, the cooler 53 can be used to cool the coolant discharged from the centrifugal compressor 3, improving the cooling effect of the coolant and thus enhancing the cooling and heat dissipation effect of the centrifugal blower. Preferably, the cooler 53 is located at the edge of the casing 1 and below the outlet end of the exhaust header 4. This avoids interference between the cooler 53 and the centrifugal compressor 3 and the coolant tank 51, and also shortens the connecting pipeline between the cooler 53 and the centrifugal compressor 3 and the coolant tank 51.

Claims

1. A centrifugal blower, characterized in that, The centrifugal blower includes a frequency converter installed in a chassis and two centrifugal compressors arranged in parallel. The frequency converter is connected to the drive motor of the centrifugal compressor, and the compressed air outlet of the centrifugal compressor is connected to the air outlet header.

2. The centrifugal blower according to claim 1, characterized in that, The compressed air outlet of the centrifugal compressor is connected to the main air outlet pipe via an air outlet pipe.

3. The centrifugal blower according to claim 2, characterized in that, The vent pipe is equipped with a vent valve and a silencer. The vent valve is located inside the chassis, and the silencer is located on the top of the chassis and connected to the vent valve's vent end.

4. The centrifugal blower according to any one of claims 1-3, characterized in that, The chassis is equipped with a coolant tank and a coolant pump. The coolant tank is located at the bottom of the chassis. The inlet of the coolant pump is connected to the outlet of the coolant tank. The outlet of the coolant pump is connected to the coolant inlet of the frequency converter. The coolant outlet of the frequency converter is connected to the coolant inlet of the centrifugal compressor. The coolant outlet of the centrifugal compressor is connected to the return port of the coolant tank.

5. The centrifugal blower according to claim 4, characterized in that, The coolant tank is located to the side of the centrifugal compressor, and the cooling pump is located above the coolant tank.

6. The centrifugal blower according to claim 4, characterized in that, A cooler is installed between the centrifugal compressor and the coolant tank. The cooling inlet of the cooler is connected to the cooling outlet on the centrifugal compressor, and the cooling outlet of the cooler is connected to the return port on the coolant tank.

7. The centrifugal blower according to claim 6, characterized in that, The cooler is located at the edge of the chassis and below the outlet end of the exhaust header.

8. The centrifugal blower according to any one of claims 1-3, characterized in that, The frequency converter is a silicon carbide frequency converter.

9. The centrifugal blower according to any one of claims 1-3, characterized in that, The centrifugal compressor is equipped with an air intake filter.

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