CN204718438U - The enclosed cooling unit of the wet curtain of band and low pressure automatic water jetting heat sink - Google Patents

Abstract

A closed cooling unit with a wet curtain and a low-pressure automatic water spray cooling device, characterized in that: it includes a fan, a heat exchanger, a water spray device and a wet curtain; the fan is arranged above the heat exchanger, and Draw air upwards; the wet curtain is vertically arranged on the outside of the heat exchanger to isolate the heat exchanger from the external environment; the water spray device includes a water spray pipe, and the front end of the water spray pipe is a water spray inlet. The pipe is provided with a decompression valve and a solenoid valve in turn behind the water spray inlet, and the end of the water spray pipe is a water spray outlet, and the water spray outlet is set above the wet curtain to moisten the water. Wet curtain; the electromagnetic valve is electrically connected to a controller, and the controller is electrically connected to a temperature and humidity sensor, and the temperature and humidity sensor is arranged in the external environment. The utility model can control the amount of sprayed water in real time according to the current environment temperature and humidity, saves water resources, has low power consumption, does not need to soften the water, does not need to limit the spraying time, has small volume and low cost.

Description

Closed cooling unit with wet curtain and low-pressure automatic water spray cooling device

technical field

The utility model relates to a closed cooling unit, in particular to a closed cooling unit with a wet curtain and a low-pressure water spray cooling system.

Background technique

Usually, the closed cooling unit is composed of heat exchanger, fan and control system. The temperature of the cooling water produced by the cooling unit is usually 5 degrees Celsius higher than the ambient dry bulb temperature. With this design, in winter or when the ambient temperature is relatively low, the temperature of the water coming out of the cooler can generally meet the process requirements, but in hot summer, The outlet water temperature appears to be too high, which cannot meet the cooling requirements.

There is also a common closed cooler, which has a water spray function, and can obtain cooling water with a lower temperature in summer or when the temperature is higher. The principle of the closed cooler is to use a high-pressure water pump to pressurize, and the high-pressure water passes through the atomizing nozzle to generate water mist to reduce the temperature of the air entering the closed cooler. However, the existing technology has the following disadvantages: 1. A booster pump is required, which increases power consumption; 2. The water needs to be softened to generate water mist, otherwise the nozzle will be blocked, and scaling will be formed on the heat exchanger, reducing heat transfer. Efficiency; 3. The water spraying time must be limited. Generally, the water spraying time does not exceed 200 hours per year, otherwise the life of the heat exchanger fins will be seriously reduced.

There is another common closed cooler, which uses a wet curtain structure, but it requires a water circulation system, uses a water pump to spray water to the wet curtain, and needs to collect the water flowing from the wet curtain and store it in an open water tank , the water pump draws water from the water tank to spray water for the wet curtain. The structure of this system is complicated, and the volume of the product needs to be increased, and the cost is increased.

For this reason, how to solve the above-mentioned deficiencies in the prior art has become the subject of the utility model to be studied.

Contents of the invention

The purpose of the utility model is to provide a closed cooling unit with a wet curtain and a low-pressure automatic water spray cooling device to solve many shortcomings in the prior art.

In order to achieve the above object, the technical solution adopted by the utility model is: a closed cooling unit with a wet curtain and a low-pressure automatic water spray cooling device, including a fan, a heat exchanger, a water spray device and a wet curtain; above the heat exchanger, and draw air upwards; the wet curtain is vertically arranged on the outside of the heat exchanger to isolate the heat exchanger from the external environment; the water spray device includes a water spray pipe, The front end of the water spray pipe is a water spray inlet, and the water spray pipe is provided with a pressure reducing valve and a solenoid valve in sequence behind the water spray inlet. The end of the water spray pipe is a water spray outlet, and the water spray outlet corresponds to Set above the wet curtain to wet the wet curtain;

The electromagnetic valve is electrically connected with a controller, and the controller is electrically connected with a temperature and humidity sensor, and the temperature and humidity sensor is arranged in the external environment.

The relevant content in the above-mentioned technical scheme is explained as follows:

1. In the above solution, the wet curtain is vertically arranged on the outside of the heat exchanger to isolate the heat exchanger from the external environment, so as to ensure that the air entering the heat exchanger must first pass through the wet curtain.

2. In the above scheme, the fan is arranged above the heat exchanger and draws air upwards to generate a negative pressure in the installation area of the heat exchanger, so that the air from the external environment enters the installation of the heat exchanger through the wet curtain. area, while cooling the heat exchanger.

3. In the above solution, the pressure reducing valve is used to reduce the pressure of the water entering the water spray inlet to not less than 50 kPa, while the general urban tap water pressure is about 300 kPa, so a booster pump is not needed.

4. In the above solution, the temperature and humidity sensor is used to detect the ambient temperature and humidity, and transmit the data to the controller in real time. The flow rate is used to calculate the water spray volume required at this time, and then control the on-off of the solenoid valve to control the water spray volume of the water spray outlet.

5. In the above solution, a filter is provided behind the water spray inlet and in front of the pressure reducing valve to filter out impurities in the water, thereby reducing the requirement for source water.

The working principle of the utility model is as follows: The utility model is a closed cooling unit with a wet curtain and a low-pressure automatic water spray cooling device, wherein the water spray device includes a water spray pipe, a pressure reducing valve, a solenoid valve, a controller and a temperature and humidity sensor. The ambient temperature and humidity are detected by the temperature and humidity sensor, the controller calculates the moisture content of the air, and calculates the required water spraying amount according to the air flow passing through the heat exchanger. The water that enters the water spray pipe first passes through the pressure reducing valve to reach a stable pressure, and then through the switching time ratio of the solenoid valve, the actual water spray volume is consistent with the theoretically required water spray volume. The controller decides whether to spray water according to the difference between the outlet water temperature of the cooling unit and the set temperature. If water spray is not required, the solenoid valve is normally closed. If water spray is required, the appropriate water spray volume is controlled according to the above parameters.

Compared with the prior art, the utility model has the following advantages:

1. The amount of sprayed water can be controlled according to actual needs, without wasting water resources;

2. The water spray method has no damage to the heat exchanger, and there is no time limit for water spray, which maximizes the cooling effect of the unit;

3. Wet with dripping water, no need for water spray softening treatment, saving initial investment and operating costs;

4. There is no need to use a booster pump, and the power consumption is low;

5. The structure is simple, the volume is small, and the cost is relatively low.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model embodiment.

In the attached drawings above: 1. Fan; 2. Heat exchanger; 3. Wet curtain; 4. Spray pipe; 5. 6. Spray water inlet; filter; 7. Pressure reducing valve; 8. Solenoid valve; 9. Water spray outlet; 10. 11. controller; 11. Temperature and humidity sensor; Water inlet; 13. Outlet.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment: referring to shown in accompanying drawing 1, a kind of closed cooling unit with wet curtain and low-pressure automatic water spray cooling device, comprises blower fan 1, heat exchanger 2, water spray device and wet curtain 3; Described blower blower 1 is set Above the heat exchanger 2, and draw air upwards; the wet curtain 3 is vertically installed on the outside of the heat exchanger 2, so as to block the heat exchanger 2 from the external environment and ensure that it enters the heat exchanger The air in 2 needs to pass through the wet curtain 3 first. Described water spray device comprises water spray pipe 4, and the front end of water spray pipe 4 is water spray inlet 5, and the rear of described water spray inlet 5 on water spray pipe 4 is provided with filter 6, decompression valve 7 and electromagnetic successively. Valve 8, the end of the water spray pipe 4 is a water spray outlet 9, and the water spray outlet 9 is arranged above the wet curtain 3 to wet the wet curtain 3;

The solenoid valve 8 is electrically connected to a controller 10, and the controller 10 is electrically connected to a temperature and humidity sensor 11, and the temperature and humidity sensor 11 is arranged in the external environment.

Wherein, the fan 1 draws air upwards to generate a negative pressure in the setting area of the heat exchanger 2, so that the air from the external environment enters the setting area of the heat exchanger 2 through the wet curtain 3, and cools down the heat exchanger 2 .

Wherein, the filter 6 is used to filter out impurities in the water, thereby reducing the requirement on the source water. The decompression valve 7 is used to decompress the water coming in from the water spray inlet 5 to not less than 50 kPa, while the general city tap water pressure is about 300 kPa, so a booster pump is not needed.

Wherein, the temperature and humidity sensor 11 is used to detect the ambient temperature and humidity, and transmit the data to the controller 10 in real time, calculate the moisture content of the current air through the controller 10, and pass through the heat exchanger 2 The air flow rate at this time calculates the required water spray volume at this time, and then controls the on-off of the solenoid valve 8 to control the water spray volume of the water spray outlet 9 .

During work, as shown in Figure 1, the high-temperature cooling water in industrial production enters from the water inlet 12 of the heat exchanger, produces lower temperature water after being cooled by the heat exchanger, and flows out from the water outlet 13 of the heat exchanger; During operation, air is drawn from the inside of the heat exchanger 2 of the cooling unit, and negative pressure is generated inside the unit. The outside air outside the unit first passes through the wet curtain 3 under the push of the pressure difference, and the air temperature is reduced to close to the wet bulb temperature, and then passes through the heat exchanger. 2, so as to reduce the water temperature in the heat exchanger 2 (the direction of air flow is indicated by the arrow in the figure); the controller 10 judges the amount of sprayed water according to the outlet water temperature of the cooling unit, the set temperature and the temperature and humidity of the ambient air, and then puts the appropriate amount of water Spray to the top of the wet curtain 3 and flow down from above. When the air passes through the wet curtain 3, the water on the wet curtain 3 will vaporize and absorb heat, thereby reducing the temperature of the air passing through the wet curtain 3.

The utility model relates to a closed cooling unit with a wet curtain and a low-pressure automatic water spray cooling device, wherein the water spray device includes a water spray pipe, a pressure reducing valve, a solenoid valve, a controller and a temperature and humidity sensor. The ambient temperature and humidity are detected by the temperature and humidity sensor, the controller calculates the moisture content of the air, and calculates the required water spraying amount according to the air flow passing through the heat exchanger. The water that enters the water spray pipe first passes through the pressure reducing valve to reach a stable pressure, and then through the switching time ratio of the solenoid valve, the actual water spray volume is consistent with the theoretically required water spray volume. The controller decides whether to spray water according to the difference between the outlet water temperature of the cooling unit and the set temperature. If water spray is not required, the solenoid valve is always closed.

Compared with the prior art, the utility model has the following advantages:

1. The amount of sprayed water can be controlled according to actual needs, without wasting water resources;

2. The water spray method has no damage to the heat exchanger, and there is no time limit for water spray, which maximizes the cooling effect of the unit;

3. Wet with dripping water, no need for water spray softening treatment, saving initial investment and operating costs;

4. There is no need to use a booster pump, and the power consumption is low;

5. The structure is simple, the volume is small, and the cost is relatively low.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (2)

1. A closed cooling unit with a wet curtain and a low-pressure automatic water spray cooling device, characterized in that: it comprises a blower fan, a heat exchanger, a water spray device and a wet curtain; the blower fan is located above the heat exchanger , and draw air upwards; the wet curtain is vertically arranged on the outside of the heat exchanger to isolate the heat exchanger from the external environment; the water spray device includes a water spray pipe, and the front end of the water spray pipe is a water spray Inlet, the water spray pipe is provided with a pressure reducing valve and a solenoid valve in sequence behind the water spray inlet, the end of the water spray pipe is a water spray outlet, and the water spray outlet is set above the wet curtain, to wet the wet curtain; The electromagnetic valve is electrically connected with a controller, and the controller is electrically connected with a temperature and humidity sensor, and the temperature and humidity sensor is arranged in the external environment. 2 . The closed cooling unit according to claim 1 , wherein a filter is provided behind the water spray inlet and in front of the pressure reducing valve. 3 .