Energy-saving cooling tower

Abstract

The utility model relates to an energy-saving cooling tower in the technical field of cooling devices, which comprises a cooling tower body and a water tank, an air outlet is arranged at the top of the cooling tower body, an exhaust fan is arranged above the air outlet and is driven by a variable frequency motor, a water return pipe is arranged above the cooling tower body, a temperature sensor is arranged on the water return pipe, and the water tank is connected with the water tank. The temperature sensor is electrically connected with a controller of the variable frequency motor, a filler frame is arranged in the cooling tower body, the top end of the filler frame is connected with a spraying grating pipe, the spraying grating pipe is communicated with the water return pipe, and an annular stainless steel net plate is obliquely connected between the upper groove edge of the water tank and the bottom side wall of the cooling tower body; screen plate cleaning mechanisms are evenly distributed on the stainless steel screen plate in the circumferential direction, the bottom side portion of the water tank communicates with a water outlet pipe, and a circulating water pump is arranged on the water outlet pipe. The device is simple in structure and good in energy-saving effect, can effectively intercept impurities such as leaves and plastic bags, is convenient for improving the quality of circulating water, and is beneficial to reducing the drifting rate of the cooling tower.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling devices, and in particular relates to an energy-saving cooling tower. Background Art

[0002] A cooling tower is a device that uses water as a circulating coolant to absorb heat from a system and discharge it into the atmosphere to lower the water temperature. It uses the heat exchange between water and air flow to generate steam, and the steam evaporates and takes away the heat to achieve the principles of evaporative heat dissipation, convection heat transfer and radiation heat transfer to dissipate the waste heat generated in industry or refrigeration and air conditioning to lower the water temperature. The evaporative heat dissipation device uses the principles of evaporative heat dissipation, convection heat transfer and radiation heat transfer to dissipate the waste heat generated in industry or refrigeration and air conditioning to lower the water temperature to ensure the normal operation of the system. The device is generally barrel-shaped, hence the name cooling tower.

[0003] In the process of existing cooling towers, leaves, plastic bags and other debris in the external environment easily enter the bottom of the cooling tower with the air flow and settle in the water tank below the cooling tower, causing the circulating water quality to deteriorate and clogging the water outlet of the water tank. Although in the prior art, some people set a ring-shaped grille above the water tank to intercept impurities, the use effect is not good. In addition, the existing cooling tower has a high water drift rate and the energy-saving effect needs to be strengthened. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems.

[0005] The technical scheme is as follows: an energy-saving cooling tower comprises a cooling tower body and a water tank arranged at the bottom of the cooling tower body, an air outlet is arranged on the top of the cooling tower body, an exhaust fan is arranged above the air outlet, the exhaust fan is driven by a variable frequency motor, a return pipe is arranged above the cooling tower body, a temperature sensor is arranged on the return pipe, the temperature sensor is electrically connected to the controller of the variable frequency motor, a filling rack is arranged in the cooling tower body, a filling layer is arranged on the filling rack, and a spray grid pipe is connected to the top of the filling rack, the spray grid pipe is connected to the return pipe, and a plurality of nozzles facing the filling layer are evenly distributed on the spray grid pipe, an annular stainless steel mesh plate is obliquely connected between the upper groove edge of the water tank and the bottom side wall of the cooling tower body, a mesh cleaning mechanism is evenly distributed circumferentially on the upper edge of the stainless steel mesh plate, an outlet pipe is connected to the bottom side of the water tank, and a circulating water pump is arranged on the outlet pipe.

[0006] Preferably, the mesh cleaning mechanism is an electric vibrator, and the controller adopts a PLC controller. The electric vibrator and the variable frequency motor are electrically connected to the PLC controller respectively. Through this setting, when the variable frequency motor stops or maintains a low frequency operation, the electric vibrator can be automatically started by the PLC controller to ensure the vibration cleaning effect of the stainless steel mesh.

[0007] Preferably, the inclination angle of the stainless steel mesh plate is ≥45°, and the stainless steel mesh plate is evenly distributed with mesh holes with an aperture of ≤15 mm. By controlling the inclination angle of the stainless steel mesh plate, it is beneficial to achieve the shedding of attachments on the stainless steel mesh plate when starting the electric vibrator. By controlling the aperture of the mesh holes, it is beneficial to effectively filter light and large debris in the air.

[0008] Preferably, a demister is further provided in the cooling tower body, and the demister is arranged between the spray grid pipe and the air outlet. The demister can be a baffle demister to reduce the water drift rate of the cooling tower.

[0009] Preferably, the bottom of the water tank is evenly distributed with supporting legs along the circumferential direction, and a sewage pipe is provided at the bottom of the water tank. The sewage pipe is provided with an electric sewage valve to facilitate regular sewage discharge from the water tank to improve the quality of circulating water.

[0010] The utility model also includes other components that enable an energy-saving cooling tower to be used normally, all of which are conventional means in the field. For example, a water supply pipeline is also provided on the cooling tower body. In addition, devices or components not limited in the utility model, such as the cooling tower body, filler layer, spray grid pipe, nozzle, circulating water pump, water tank, etc., all adopt the existing technology in the field.

[0011] The working principle of the utility model is that the temperature sensor on the return pipe is connected to the controller of the variable frequency motor, and the exhaust fan can be frequency-controlled according to the return water temperature, thereby improving the energy-saving effect. The application sets an inclined stainless steel mesh plate, which, on the one hand, is conducive to improving the stability of the stainless steel mesh plate connection and saving equipment manufacturing costs. On the other hand, it can effectively filter light but large debris such as leaves and plastic bags in the outside air to ensure the quality of circulating water. By setting a mesh plate cleaning mechanism, impurities adsorbed on the stainless steel mesh plate can be cleaned regularly to ensure the flow effect of the cooling tower. At the same time, the setting of the stainless steel mesh plate is also conducive to reducing the splashing of water to the outside when it falls from the cooling tower into the water tank, thereby reducing the drift rate of the cooling tower.

[0012] Compared with the prior art, the beneficial effects of the utility model are: the device has a simple structure, good energy-saving effect, can effectively intercept leaves, plastic bags and other debris entrained in the air flow entering the cooling tower, is convenient for improving the water quality of circulating water, and is beneficial to reducing the water drift rate of the cooling tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model in the embodiment. DETAILED DESCRIPTION

[0014] The technology of the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Example

[0016] like Figure 1 As shown, an energy-saving cooling tower proposed in this embodiment includes a cooling tower body 1 and a water tank 2 arranged at the bottom of the cooling tower body, an air outlet 3 is arranged on the top of the cooling tower body, an exhaust fan 4 is arranged above the air outlet, and the exhaust fan is driven by a variable frequency motor 5, a return pipe 6 is arranged above the cooling tower body, a temperature sensor 7 is arranged on the return pipe, and the temperature sensor is electrically connected to a controller of the variable frequency motor (not shown in the figure), a filling rack 8 is arranged in the cooling tower body, a filling layer 9 is arranged on the filling rack, and a spray grid pipe 10 is connected to the top of the filling rack, the spray grid pipe is connected to the return pipe, and a plurality of nozzles 11 are evenly distributed on the spray grid pipe, with nozzles facing the filling layer, an annular stainless steel mesh plate 12 is obliquely connected between the upper groove edge of the water tank and the bottom side wall of the cooling tower body, and a mesh cleaning mechanism is evenly distributed on the upper edge of the stainless steel mesh plate in the circumferential direction, and a water outlet pipe 13 is connected to the bottom side of the water tank, and a circulating water pump 14 is arranged on the water outlet pipe.

[0017] Specifically, the mesh cleaning mechanism adopts an electric vibrator 15, and the controller adopts a PLC controller. The electric vibrator and the variable frequency motor are electrically connected to the PLC controller respectively. Through this setting, when the variable frequency motor stops or maintains a low frequency operation, the electric vibrator can be automatically started by the PLC controller to ensure the vibration cleaning effect of the stainless steel mesh.

[0018] More specifically, the inclination angle α of the stainless steel mesh is 47°, and the stainless steel mesh is evenly distributed with mesh holes with a pore size of 15 mm. By controlling the inclination angle of the stainless steel mesh, it is beneficial to achieve the shedding of attachments on the stainless steel mesh when the electric vibrator is started. By controlling the pore size of the mesh, it is beneficial to effectively filter light and large debris in the air.

[0019] In addition, a demister 16 is also provided in the cooling tower body, and the demister is arranged between the spray grid pipe and the air outlet. The demister adopts a baffle demister to reduce the drift rate of the cooling tower. The bottom of the water tank is evenly distributed with support legs 17 along the circumference, and a sewage pipe 18 is provided at the bottom of the water tank. The sewage pipe is provided with an electric sewage valve to facilitate regular sewage discharge of the water tank to improve the quality of circulating water.

[0020] In this embodiment, the variable frequency motor is connected above the air outlet of the cooling tower body through a motor bracket 19, and a protective cover 20 is provided on the outside of the variable frequency motor to extend the service life of the variable frequency motor.

[0021] The working principle of the utility model is that the temperature sensor on the return pipe is connected to the controller of the variable frequency motor, and the exhaust fan can be frequency-controlled according to the return water temperature, thereby improving the energy-saving effect. The application sets an inclined stainless steel mesh plate, which, on the one hand, is conducive to improving the stability of the stainless steel mesh plate connection and saving equipment manufacturing costs. On the other hand, it can effectively filter light but large debris such as leaves and plastic bags in the outside air to ensure the quality of circulating water. By setting a mesh plate cleaning mechanism, impurities adsorbed on the stainless steel mesh plate can be cleaned regularly to ensure the flow effect of the cooling tower. At the same time, the setting of the stainless steel mesh plate is also conducive to reducing the splashing of water to the outside when it falls from the cooling tower into the water tank, thereby reducing the drift rate of the cooling tower.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy-saving cooling tower, comprising a cooling tower body and a water tank arranged at the bottom of the cooling tower body, wherein an air outlet is arranged at the top of the cooling tower body, and an exhaust fan is arranged above the air outlet, characterized in that: The exhaust fan is driven by a variable frequency motor, a return pipe is provided above the cooling tower body, a temperature sensor is provided on the return pipe, and the temperature sensor is electrically connected to the controller of the variable frequency motor, a packing rack is provided in the cooling tower body, a packing layer is provided on the packing rack, and a spray grid pipe is connected to the top of the packing rack, the spray grid pipe is connected to the return pipe, and a plurality of nozzles facing the packing layer are evenly distributed on the spray grid pipe, an annular stainless steel mesh plate is obliquely connected between the upper groove edge of the water trough and the bottom side wall of the cooling tower body, mesh cleaning mechanisms are evenly distributed on the upper edge of the stainless steel mesh plate in the circumferential direction, an outlet pipe is connected to the bottom side of the water trough, and a circulating water pump is provided on the outlet pipe.

2. The energy-saving cooling tower according to claim 1, characterized in that: The screen cleaning mechanism is an electric vibrator, the controller adopts a PLC controller, and the electric vibrator and the variable frequency motor are electrically connected to the PLC controller respectively.

3. The energy-saving cooling tower according to claim 2 is characterized in that: The inclination angle of the stainless steel mesh plate is ≥45°, and mesh holes with an aperture of ≤15 mm are evenly distributed on the stainless steel mesh plate.

4. The energy-saving cooling tower according to claim 1 is characterized in that: A demister is also provided in the cooling tower body, and the demister is arranged between the spray grid pipe and the air outlet.

5. The energy-saving cooling tower according to any one of claims 1 to 4, characterized in that: The bottom of the water tank is evenly distributed with supporting legs along the circumferential direction, and the bottom of the water tank is provided with a sewage pipe, and the sewage pipe is provided with an electric sewage valve.

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