Closed cooling tower with automatic water changing function

Abstract

The utility model relates to a closed cooling tower with an automatic water changing function, which comprises a shell and a plurality of heat exchangers arranged in the shell, an air outlet is arranged at the top of the shell, a lower water tank is arranged at the bottom of the shell, an air inlet shutter is arranged on the peripheral wall of the shell between the lower water tank and the heat exchangers, and an upper water tank is arranged in the shell on the upper sides of the heat exchangers. Spraying holes are formed in the bottom wall of the upper water tank, the lower water tank is connected with a spraying pump through a water suction pipe, a water outlet of the spraying pump is connected with a water supply pipe leading to the upper water tank, the lower water tank is further connected with a water drainage pipe and a water supplementing pipe, and a water drainage electric switch valve and a water supplementing electric switch valve are correspondingly arranged on the water drainage pipe and the water supplementing pipe. And the drainage electric switch valve and the water replenishing electric switch valve are respectively connected with the control cabinet. The cooling device has the advantages of being simple in structure, low in cost, good in cooling effect, high in automation degree and high in practicability.

Description

Technical Field

[0001] The utility model relates to a heat exchange device, in particular to a closed cooling tower with an automatic water exchange function. Background Art

[0002] In the field of air conditioning and refrigeration, closed cooling towers are commonly used as a heat exchange device, and a spray system is usually installed to improve the heat exchange efficiency. In order to avoid scaling and algae growth in the spray water, appropriate amounts of chemical agents such as corrosion inhibitors, scale inhibitors and fungicides are usually added to the spray water in this field. Among them, corrosion inhibitors can protect the metal surface and prevent corrosion, scale inhibitors can prevent mineral deposition and scale formation, and fungicides can control microbial reproduction and prevent biofilm formation. However, as the spray water circulates and absorbs heat and evaporates, the water will gradually be lost, and the concentration of minerals and impurities therein will gradually increase, thereby increasing the concentration ratio and affecting the spray effect. This requires regular or irregular discharge of part of the old spray water and replenishment of a corresponding amount of new spray water to ensure the balance and stability of the spray water quality. At present, manual drainage and water replenishment are usually carried out in this field. When personnel management is in place, the operator will first open the drain valve to discharge a part of the old spray water, and then open the water replenishment valve to replenish a part of the new spray water according to the water change time requirement. The operation depends entirely on personal experience, which affects the accuracy of water change control and is labor-intensive. When personnel management is not in place, on the one hand, the equipment operation efficiency and service life will be affected due to untimely water change, and on the other hand, frequent water changes will cause waste of water resources and chemicals. Utility Model Content

[0003] The utility model aims to provide a closed cooling tower with an automatic water changing function, which has the advantages of simple structure, low cost, good cooling effect, high degree of automation and strong practicality.

[0004] In order to solve the problems existing in the prior art, the utility model provides a closed cooling tower with an automatic water changing function, comprising a shell and a plurality of heat exchangers arranged in the shell, an air outlet is provided on the top of the shell, a lower water trough is provided at the bottom of the shell, and air inlet louvers are provided on the peripheral wall of the shell between the lower water trough and the heat exchanger, an upper water trough is provided in the shell on the upper side of the heat exchanger, and a spray hole is provided on the bottom wall of the upper water trough, the lower water trough is connected to a spray pump through a water suction pipe, the water outlet of the spray pump is connected to a water supply pipe leading to the upper water trough, the lower water trough is also connected to a drain pipe and a water supply pipe, and a drain electric switch valve and a water supply electric switch valve are provided on the drain pipe and the water supply pipe respectively, and the drain electric switch valve and the water supply electric switch valve are respectively connected to the control cabinet.

[0005] Furthermore, the utility model provides a closed cooling tower with an automatic water changing function, wherein a water quality sensor is provided in the lower water tank, the water quality sensor is used to monitor the conductivity, pH value and microbial content of the spray water, and a remote water meter is provided on the water supply pipe, the remote water meter is used to monitor the water supply amount; the water quality sensor and the remote water meter are respectively connected to the control cabinet.

[0006] Furthermore, the utility model provides a closed cooling tower with an automatic water changing function, wherein a manual drain switch valve and a manual water supply switch valve are provided on the drain pipe and the water supply pipe respectively, the manual drain switch valve is located on the side of the electric drain switch valve away from the lower water tank, and the manual water supply switch valve is located on the side of the electric water supply switch valve away from the lower water tank.

[0007] Furthermore, the utility model provides a closed cooling tower with an automatic water changing function, wherein a fan is provided at the air outlet, and the fan is connected to a motor.

[0008] Furthermore, the utility model provides a closed cooling tower with an automatic water changing function, wherein the multiple heat exchangers are evenly distributed along the circumference of the shell, and the liquid inlet pipe and liquid outlet pipe of the heat exchanger extend from the upper and lower sides of the shell respectively and are connected to the refrigeration terminal.

[0009] Furthermore, the utility model provides a closed cooling tower with an automatic water changing function, wherein the spray pump and the motor are respectively connected to an electric control cabinet, and the control cabinet and the electric control cabinet are respectively connected to a central control system.

[0010] Compared with the prior art, the utility model discloses a closed cooling tower with automatic water changing function, which has the following advantages: the utility model provides a shell and multiple heat exchangers in the shell, an air outlet is provided at the top of the shell, a lower water trough is provided at the bottom of the shell, air inlet louvers are provided on the shell peripheral wall between the lower water trough and the heat exchanger, an upper water trough is provided in the shell on the upper side of the heat exchanger, a spray hole is provided on the bottom wall of the upper water trough, the lower water trough is connected to the spray pump through the water suction pipe, the water outlet of the spray pump is connected to the water supply pipe leading to the upper water trough, and the lower water trough is connected to the drain pipe and the water supply pipe, wherein the drain pipe and the water supply pipe are correspondingly provided with a drain electric switch valve and a water supply electric switch valve, and the drain electric switch valve and the water supply electric switch valve are respectively connected to the control cabinet. The result is a closed cooling tower with a simple structure, low cost, good cooling effect, high degree of automation and strong practicality. In actual application, the heat exchanger is connected to the refrigeration terminal through its liquid inlet pipe and liquid outlet pipe to form a circulation loop. During operation, air will continuously enter the shell through the air inlet louver, flow through the heat exchanger and be discharged from the air outlet. The spray water will circulate in the spray system composed of the lower water tank, water suction pipe, spray pump, water supply pipe and upper water tank and spray on the heat exchanger; the cooling medium will circulate between the heat exchanger and the refrigeration terminal. During the whole process, the air continuously conducts heat transfer with the cooling medium in the heat exchanger, and uses the evaporation of spray water to absorb heat to improve the heat exchange efficiency. The saturated hot and humid air after absorbing heat is discharged into the atmosphere from the air outlet, and the cooling medium after releasing heat is transported to the refrigeration terminal by the heat exchanger. Compared with the prior art, the utility model arranges a drainage electric switching valve and a water supply electric switching valve on the drainage pipe and the water supply pipe respectively, and connects the drainage electric switching valve and the water supply electric switching valve to the control cabinet respectively. According to actual conditions such as the energy efficiency of the cooling tower and the amount of spray water, the opening cycle and opening time of the drainage electric switching valve and the water supply electric switching valve can be controlled by the control cabinet, thereby achieving the purpose of automatic water change, improving the water change control accuracy and reducing labor intensity.

[0011] The following is a further detailed description of a closed cooling tower with automatic water changing function according to the present invention in conjunction with the specific embodiments shown in the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a closed cooling tower with automatic water changing function according to the present utility model. DETAILED DESCRIPTION

[0013] First of all, it should be noted that the directional words such as up, down, left, right, front and back described in the present invention are only described according to the drawings for the convenience of understanding, and are not intended to limit the technical solution and scope of protection of the present invention.

[0014] like Figure 1The utility model is a specific embodiment of a closed cooling tower with an automatic water exchange function, comprising a housing 1 and a plurality of heat exchangers 2 disposed in the housing 1. An air outlet 11 is provided at the top of the housing 1 so that air can be discharged from the air outlet 11. A lower water trough 12 is provided at the bottom of the housing 1. Air inlet louvers 13 are provided on the peripheral wall of the housing 1 between the lower water trough 12 and the heat exchangers 2 so that air can enter the housing 1 through the air inlet louvers 13. An upper water trough 14 is provided in the housing 1 above the heat exchangers 2. Spray holes are provided on the bottom wall of the upper water trough 14. The lower water trough 12 is connected to a spray pump 16 via a water suction pipe 15, and the water outlet of the spray pump 16 is connected to a water supply pipe 17 leading to the upper water trough 14. At the same time, a drain pipe 3 and a water supply pipe 4 connected to the lower water tank 12 are set, and a drain electric switch valve 31 and a water supply electric switch valve 41 are correspondingly set on the drain pipe 3 and the water supply pipe 4, and the drain electric switch valve 31 and the water supply electric switch valve 41 are respectively connected to the control cabinet 5.

[0015] The above arrangement forms a closed cooling tower with a simple structure, low cost, good cooling effect, high degree of automation, and strong practicality. In actual application, the heat exchanger 2 is connected to the cooling terminal through its liquid inlet pipe 21 and liquid outlet pipe 22 to form a circulation loop, and the water supply pipe 4 is connected to the water supply source. During operation, air continuously enters the housing 1 through the air inlet louvers 13, flows through the heat exchanger 2, and is discharged from the air outlet 11. The spray water circulates in the spray system composed of the lower water tank 12, the water suction pipe 15, the spray pump 16, the water supply pipe 17, and the upper water tank 14 and is sprayed on the heat exchanger 2. The cooling medium circulates between the heat exchanger 2 and the cooling terminal. During the entire process, the air continuously conducts heat with the cooling medium in the heat exchanger 2, and the evaporation of the spray water absorbs heat to improve the heat exchange efficiency. The saturated hot and humid air after absorbing heat is discharged into the atmosphere through the air outlet 11, and the cooling medium after releasing heat is transported to the cooling terminal by the heat exchanger 2. Compared with the prior art, the present invention provides a drain electric switch valve 31 and a water supply electric switch valve 41 on the drain pipe 3 and the water supply pipe 4, and connects the drain electric switch valve 31 and the water supply electric switch valve 41 to the control cabinet 5 respectively. The drain electric switch valve 31 and the water supply electric switch valve 41 can be controlled by the control cabinet 5 according to the actual conditions such as the energy efficiency of the cooling tower and the amount of spray water, thereby achieving the purpose of automatic water change, improving the water change control accuracy, and reducing labor intensity. It should be noted that in order to improve structural stability and cooling efficiency, the present invention usually evenly distributes multiple heat exchangers 2 along the circumference of the shell 1, and makes the liquid inlet pipe 21 and the liquid outlet pipe 22 of the heat exchanger 2 extend from the upper and lower sides of the shell 1 respectively, so as to facilitate connection to the refrigeration terminal through the pipeline. The water in the above-mentioned water supply source refers to water to which a certain amount of corrosion inhibitor, scale inhibitor and bactericide is added in proportion according to actual needs.

[0016] As an optimization solution, this specific embodiment installs a water quality sensor 6 in the lower water tank 12 for monitoring the conductivity, pH value, and microbial content of the spray water. A remote water meter 42 is installed on the water supply pipe 4 to monitor the replenishment water volume. Both the water quality sensor 6 and the remote water meter 42 are connected to the control cabinet 5. This structure improves the functionality and practicality of the cooling tower by installing the water quality sensor 6 and the remote water meter 42. The water quality sensor 6 monitors the conductivity, pH value, and microbial content of the spray water and transmits the monitoring data to the control cabinet 5. When a particular monitoring value reaches a set value, the drain electric on-off valve 31 is opened for a certain period of time, and then the water supply electric on-off valve 41 is opened for a certain period of time. This achieves the purpose of automatically changing the water according to the monitoring data, improves the timeliness and effectiveness of water changes, and ensures the spraying effect and the safety and reliability of the equipment. This embodiment also includes a manual drain valve 32 and a manual water supply valve 43 on the drain pipe 3 and the water supply pipe 4, respectively. The manual drain valve 32 is located on the side of the electric drain valve 31 away from the lower trough 12, while the manual water supply valve 43 is located on the side of the electric water supply valve 41 away from the lower trough 12. The provision of the manual drain valve 32 and the manual water supply valve 43 improves the safety and reliability of the cooling tower. When the electric drain valve 31 and the electric water supply valve 41 experience an abnormality and require repair or replacement, the corresponding pipelines can be disconnected via the manual drain valve 32 and the manual water supply valve 43 to facilitate maintenance. It should be noted that under normal operating conditions, the manual drain valve 32 and the manual water supply valve 43 should be open to avoid affecting the normal water exchange of the cooling tower. The water quality sensor 6 is not limited to monitoring the conductivity, pH value, and microbial content of the spray water; sensors for other water quality parameters can also be deployed as needed.

[0017] In actual application, in order to improve the air flow rate and heat exchange efficiency, the utility model sets a fan 7 at the air outlet 11, and connects the fan 7 to the motor 71; in order to improve the convenience of control, the utility model connects the spray pump 16 and the motor 71 to the electric control cabinet 8 respectively, so that the operation of the spray pump 16 and the motor 71 can be controlled by the electric control cabinet 8, and the control cabinet 5 and the electric control cabinet 8 are respectively connected to the central control system 9.

[0018] Practical application has shown that the closed cooling tower provided by the utility model can produce the following beneficial effects: 1. Problems can be discovered in time: Through monitoring, changes in the water quality of the spray water can be discovered in time. By keeping the spray system clean, the deterioration of water quality can be avoided, which affects the operating efficiency of the cooling tower; 2. Preventive maintenance can be achieved: through regular inspection and maintenance, the upper and lower water tanks are kept clean, and through regular water changes or numerical water changes, the dissolved solid content in the spray water is controlled, which can prevent scaling and corrosion problems inside the cooling tower caused by excessive concentration of water quality; 3. The service life of the cooling tower is extended: high-quality spray water reduces wear and corrosion on the internal equipment of the cooling tower, and extends the service life of the cooling tower; 4. The cooling efficiency of the cooling tower is improved: clean spray water ensures stable and efficient heat exchange efficiency, and avoids the decline in heat exchange performance caused by scaling and dirt.

[0019] The above embodiments are merely descriptions of preferred implementations of the present invention and do not limit the scope of protection requested for the present invention. Without departing from the design concept of the present invention, various modifications made by those skilled in the art based on the technical solution of the present invention should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A closed cooling tower with automatic water changing function, characterized in that: The invention comprises a shell (1) and a plurality of heat exchangers (2) arranged in the shell (1), wherein an air outlet (11) is provided at the top of the shell (1), a lower water tank (12) is provided at the bottom of the shell (1), an air inlet louver (13) is provided on the peripheral wall of the shell (1) between the lower water tank (12) and the heat exchanger (2), an upper water tank (14) is provided in the shell (1) on the upper side of the heat exchanger (2), a spray hole is provided on the bottom wall of the upper water tank (14), and the lower water tank (12) is provided with a spray hole. A spray pump (16) is connected via a water suction pipe (15), and a water outlet of the spray pump (16) is connected to a water supply pipe (17) leading to an upper water tank (14). The lower water tank (12) is also connected to a drain pipe (3) and a water supply pipe (4). A drain electric switch valve (31) and a water supply electric switch valve (41) are provided on the drain pipe (3) and the water supply pipe (4) respectively. The drain electric switch valve (31) and the water supply electric switch valve (41) are respectively connected to a control cabinet (5).

2. A closed cooling tower with automatic water changing function according to claim 1, characterized in that: A water quality sensor (6) is provided in the lower water tank (12), and the water quality sensor (6) is used to monitor the conductivity, pH value and microbial content of the spray water. A remote water meter (42) is provided on the water supply pipe (4), and the remote water meter (42) is used to monitor the water supply amount. The water quality sensor (6) and the remote water meter (42) are respectively connected to the control cabinet (5).

3. A closed cooling tower with automatic water changing function according to claim 2, characterized in that: The drain pipe (3) and the water supply pipe (4) are provided with a drain manual switch valve (32) and a water supply manual switch valve (43) respectively. The drain manual switch valve (32) is located on a side of the drain electric switch valve (31) away from the lower water tank (12), and the water supply manual switch valve (43) is located on a side of the water supply electric switch valve (41) away from the lower water tank (12).

4. A closed cooling tower with automatic water changing function according to claim 3, characterized in that: A fan (7) is provided at the air outlet (11), and the fan (7) is connected to a motor (71).

5. A closed cooling tower with automatic water changing function according to claim 4, characterized in that: The plurality of heat exchangers (2) are evenly distributed along the circumference of the shell (1), and the liquid inlet pipe (21) and the liquid outlet pipe (22) of the heat exchanger (2) extend from the upper side and the lower side of the shell (1) respectively and are connected to the refrigeration terminal.

6. A closed cooling tower with automatic water changing function according to claim 5, characterized in that: The spray pump (16) and the motor (71) are respectively connected to the electric control cabinet (8), and the control cabinet (5) and the electric control cabinet (8) are respectively connected to the central control system (9).

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