CN105333652A - Large-enthalpy-difference evaporative cooling water cooling device - Google Patents

Abstract

The present invention provides a large enthalpy difference evaporative cooling water cooling device, comprising: a housing, a fan, and a water eliminator, a sprinkler, a coil, a filler, a water diversion plate, and a rib plate are sequentially arranged inside the housing from top to bottom. The housing between the pipe, water tank, packing and water guide plate is provided with an air inlet with embedded louvers, the end of the coil is connected to the beginning of the finned coil, and the end of the finned coil is connected to the end of the coil through the refrigerant source. At the beginning, the sprinkler, the spray water pump and the water outlet in the water tank form a spray water circuit, and the water guide plate includes an inclined guide part, and a vertical part whose end is located under the finned coil and has a gap between the housing; The thermal fluid refrigerant of the present invention is cooled twice, the condensation temperature is lower, the energy efficiency ratio of the chiller is improved, the power consumption of the compressor is reduced, and the amount of circulating water is reduced, thereby achieving the purpose of saving water and energy; the present invention can be applied to evaporative cooling air conditioners , Fengshui air conditioner, low-pressure steam condenser, cold storage machine room, etc., have a wide range of promotion and use value.

Description

Large enthalpy difference evaporative cooling water cooling device

technical field

The invention belongs to the technical field of cooling equipment, and in particular relates to a large enthalpy difference evaporative cooling water cooling device.

Background technique

The condenser belongs to the heat exchanger and is an important heat exchange equipment in the refrigeration system. Condensers can be mainly divided into water-cooled condensers, air-cooled (also known as air-cooled) condensers, and combined water and air cooled condensers. The water-cooled heat exchanger has a large heat transfer coefficient and requires additional cooling water systems such as cooling pumps and cooling towers. Therefore, it occupies a large area, is complicated to install, and consumes a lot of water. It is difficult to promote in places where water resources are scarce.

Evaporative cooling technology uses the principle of water vapor to absorb heat, and removes the heat of the medium in the coil through the heat and moisture exchange between water and air. The heat transfer process includes sensible heat transfer and latent heat transfer. The evaporative cooling cycle water volume is smaller than that of water cooling. Unfilled evaporative coolers are bulky, heavy duty and relatively inefficient. The heat exchange between air and water in the packed evaporative condenser is the comprehensive result of sensible heat exchange and latent heat exchange. There are few domestic relevant literatures on the research on packing evaporative condensers, and the quality of domestic products is far behind that of foreign brands. Perfecting the theoretical research on packing evaporative condensers and optimizing the structure of packing evaporative condensers are of great significance to energy conservation.

In nature, due to the influence of temperature changes, the temperature distribution of water bodies in the vertical direction is uneven. This phenomenon occurs in water bodies such as lakes. At present, the principle of hydrothermal stratification is mainly used in large-scale process technology and solar water tanks. There are few other small-scale application products with limited functions and great market potential. Applying the principle of water stratification to the actual water tank, heat exchange in sections can improve the utilization rate of water energy.

Contents of the invention

In order to improve the utilization rate of water energy and solve the problems of large water consumption of the air conditioning system, the present invention proposes a large enthalpy difference evaporative cooling water cooling device.

In order to realize the foregoing invention object, the technical scheme of the present invention is as follows:

A large enthalpy difference evaporative cooling water cooling device, comprising: a shell with an upper opening and a sealed bottom, a fan located at the upper opening of the shell, and inside the shell from top to bottom are sequentially provided with traps for collecting the entrained droplets in the airflow out of the tower. Water eliminators, sprinklers for spraying spray water, coils below the sprinklers, fillers for increasing the heat exchange area between spray water and air, and for preferentially introducing spray water into finned coils The water guide plate at the bottom, the finned coil with fins outside the tube, and the water tank at the bottom of the shell, in which the coil filler forms an evaporative condenser, and the finned coil and the water tank form a water-cooled condenser. Between the filler and the water guide plate There is an air inlet with louvers embedded on the shell, the end of the coil is connected to the beginning of the fin coil, and the end of the fin coil is connected to the beginning of the coil through the refrigerant source, so that the coil, fin coil The refrigerant circuit is formed by the pipe and the refrigerant source; the sprinkler, the spray water pump and the water outlet in the water tank are connected by pipelines to form a spray water circuit, and the spray head of the sprinkler is located between the eliminator and the coil pipe. Facing the coil, the water guide plate includes an inclined guide part, a vertical part whose end is located below the finned coil and leaves a gap between it and the shell.

As a preferred mode, the inclined guide part of the water diversion plate forms a bulge protruding toward the bottom of the filler with a height in the middle and a low end at both ends. The gap between the body forms the spray water channel.

As a preferred manner, the inclined guide part includes four inclined surfaces, and the protrusion formed by them is a quadrangular pyramid.

As a preferred manner, the inclined guide part includes two inclined surfaces, and the junction of the two inclined surfaces is an intersection line parallel to the bottom of the housing.

As a preferred manner, the inclined guide part of the water guide plate is inclined from one side of the housing to the other side, the vertical part is received at the end of the guide part, and the gap between the vertical part and the housing forms a spray water channel.

As a preferred manner, the packing is plastic oblique wave interlaced packing.

As a preferred manner, the water suction port is a floating water suction port, which floats on the liquid surface of the water tank.

As a preferred manner, a water distributor is provided under the fin coil. The function of the water distributor is to make the spray water evenly flow to the bottom of the finned coil.

The present invention involves three circuits in total, namely refrigerant circuit, spray water circuit and air circuit, and its working principle is as follows:

In the refrigerant circuit, since the coil in the evaporative condenser is connected in series with the finned coil, the refrigerant is cooled twice. Refrigerant steam flows in from the top of the coil, passes through the evaporative condenser, and is cooled by spray water and air outside the tube; the heat absorbed by the air and spray water is equal to the heat discharged from the superheated part of the refrigerant vapor. The cooled refrigerant flows into the upper part of the lower finned coil, and the refrigerant is further cooled in the finned coil. The heat in the refrigerant is transferred to the water body in the water tank, and the outlet condition of the finned coil is similar to that of the refrigerant entering the expansion valve, and the heat released is approximately equal to the indoor load.

In the spray water circuit, the spray water cools down after passing through the evaporative condenser, and then heats up in the water-cooled condenser to form a stable thermal stratification in the water tank. The spray water is sprayed out by the sprinkler, and after being heated by the coil above the evaporative condenser, the spray water flows through the packing part of the evaporative condenser and directly contacts with the air for heat exchange. After the spray water passes through the filler, the temperature drops to the lowest in the whole system. The low-temperature cooling water has a high density. Under the action of the water diversion plate, the high-density low-temperature cooling water first absorbs the heat of the refrigerant fluid in the fin coil. The temperature of the low-temperature cooling water rises, the density decreases, and the water body floats to the upper part of the water tank. , a stable thermal stratification is formed in the tank. The low-temperature spray water heated in the upper part is lifted to the top sprinkler through the spray water pump through the floating suction port, and sprayed out by the sprinkler to complete a cycle. Due to the different temperature of the water body in the tank, thermal stratification is naturally formed, which saves the initial investment and operating costs and energy consumption of the water pump. The evaporative condenser reduces the amount of spraying water, saving the initial investment and operating costs of the spraying water pump; at the same time, it saves the cooling tower, reduces the head of the water pump, reduces the energy consumption of the spraying water pump, and makes the structure more compact.

In the air circuit, the air is close to saturation after heat exchange between the filler and the spray water. After being heated again, it can absorb more heat, its enthalpy value increases, and the enthalpy difference increases. The air is driven by the fan on the top of the shell, enters the shell through the air inlet with louvers embedded in the lower part of the shell, passes through the filler part, and exchanges heat with the spray water, the air temperature rises, and the enthalpy value rises. After passing through the rain zone between the filler and the coil, the air that is close to saturation enters the coil area. Due to the high temperature of the thermal fluid in the coil, the nearly saturated air is heated again, and the ability of the air to carry heat increases, taking away the heat of the refrigerant in the coil, and the enthalpy continues to rise. Due to the action of the fan, the air in the casing is finally discharged outside the casing, and the enthalpy difference between the air entering and leaving the casing is large.

In the present invention, the upper evaporative condenser and the lower water-cooled condenser are connected in series, and the refrigerant passes through the coil and the finned coil in turn, and is cooled twice; the air passes through the filler and the coil in turn, and takes away the spray water and the cooling in the coil respectively. The heat of the agent is heated twice, and the enthalpy difference increases; after the spray water is cooled down, due to the action of the water diversion plate, the thermal fluid in the fin coil is first cooled; the water body in the tank uses the principle of different water temperature and different density to form Stable thermal stratification; the shower draws hot water from the upper part of the sink through the floating water outlet.

The beneficial effects of the invention are: the thermal fluid refrigerant is cooled twice, the condensing temperature is lower, the energy efficiency ratio of the water chiller is improved, the power consumption of the compressor is reduced, and the amount of circulating water is reduced, thereby achieving the purpose of saving water and energy. The invention can be applied to evaporative cooling air conditioners, Fengshui air conditioners, low-pressure steam condensers, cold storage machine rooms, etc., and has wide popularization and use value.

Description of drawings

Fig. 1 is a schematic diagram of a large enthalpy difference evaporative cooling water cooling device of the present invention;

Fig. 2 is the schematic diagram of the front view of the water diversion plate structure in Embodiment 1 of the present invention;

Fig. 3 is a top view schematic diagram of the water diversion plate structure in Embodiment 1 of the present invention;

4 is a schematic side view of the water diversion plate structure in Embodiment 1 of the present invention;

Fig. 5 is a schematic front view of the water diversion plate structure in Embodiment 2 of the present invention;

Figure 6 is a schematic top view of the water diversion plate structure in Embodiment 2 of the present invention;

Fig. 7 is a schematic side view of the water diversion plate structure in Embodiment 2 of the present invention;

Fig. 8 is a schematic front view of the water diversion plate structure in Embodiment 3 of the present invention;

Fig. 9 is a schematic top view of the water diversion plate structure in Embodiment 3 of the present invention;

Fig. 10 is a schematic side view of the water diversion plate structure in Embodiment 3 of the present invention;

1 is the fan, 2 is the shell, 3 is the water eliminator, 4 is the sprinkler, 5 is the coil, 6 is the packing, 7 is the louver, 8 is the water diversion plate, 9 is the floating water outlet, 10 is the spray Water pump, 11 is a water tank, 12 is a fin coil, 13 is an air inlet, 14 is a gap, 15 is an inclined guide part, 16 is a vertical part, and 17 is a water distributor.

detailed description

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

Example 1

A large enthalpy difference evaporative cooling water cooling device, comprising: a housing 2 with an upper opening and a sealed bottom, a fan 1 located at the upper opening of the housing, and inside the housing sequentially from top to bottom are installed Drip eliminator 3, sprinkler 4 for spraying spray water, coil 5 under the sprayer, filler 6 for increasing spray water and air heat exchange area, and spray water The water diversion plate 8 at the bottom of the finned coil 12, the finned coil with fins outside the tube, and the water tank 11 at the bottom of the shell are preferentially introduced, in which the coil 5 filler 6 forms an evaporative condenser, and the finned coil 12 and The water tank 11 forms a water-cooled condenser. The shell between the filler and the water guide plate is provided with an air inlet 13 embedded with a louver 7. The end of the coil is connected to the beginning of the finned coil, and the end of the finned coil passes through the refrigerant. The source is connected to the beginning of the coil, so that the coil, the finned coil and the refrigerant source form a refrigerant circuit; the sprinkler, the spray water pump 10 and the floating water outlet 9 in the tank are connected by pipelines to form a spray The water circuit, the nozzle of the sprinkler is located between the water eliminator and the coil and faces the coil, the water guide plate includes an inclined guide part, the end is located under the finned coil 12 and there is a gap 14 between the shell and the vertical Straight department.

As shown in Figures 2, 3, and 4, the inclined guide portion 15 of the water diversion plate includes two inclined surfaces, the junction of the two inclined surfaces is an intersection line parallel to the bottom of the shell, and the two inclined surfaces form the middle and high ends The low protrusion protrudes toward the bottom of the filler, the vertical part 16 is received at the end of the guide part and located on both sides inside the casing, and the gap 14 between the vertical part and the casing forms a spray water channel. Under the guidance of the water guide plate 8 , the low-temperature spray water first flows to the bottom of the fin coil 12 .

The packing is plastic oblique wave interlaced packing.

The water suction port is a floating water suction port, which floats on the liquid surface of the water tank.

This embodiment involves three circuits in total, which are refrigerant circuit, spray water circuit and air circuit respectively, and its working principle is as follows:

In the refrigerant circuit, since the coil 5 in the evaporative condenser is connected in series with the finned coil 12, the refrigerant is cooled twice. Refrigerant steam flows in from the top of the coil 5, passes through the evaporative condenser, and is cooled by spray water and air outside the tube; the heat absorbed by the air and spray water is equal to the heat discharged from the superheated part of the refrigerant vapor. The cooled refrigerant flows into the upper part of the lower finned coil 12 , and the refrigerant is further cooled in the finned coil 12 . The heat in the refrigerant is transferred to the water body in the water tank, and the working condition of the outlet of the finned coil 12 is similar to that of the refrigerant entering the expansion valve, and the released heat is approximately equal to the indoor load.

In the spray water circuit, the spray water cools down after passing through the evaporative condenser, then heats up in the water-cooled condenser, forming stable thermal stratification in the water tank 11. The spray water is sprayed out by the sprayer 4, and after being heated by the coil 5 above the evaporative condenser, the spray water flows through the packing part of the evaporative condenser, and directly contacts with the air for heat exchange. After the spray water passes through the filler, the temperature drops to the lowest in the whole system. The low-temperature cooling water has a high density. Under the action of the water diversion plate 8, the high-density low-temperature cooling water first absorbs the heat of the refrigerant fluid in the finned coil 12, the temperature of the low-temperature cooling water rises, the density decreases, and the water body floats up to On the upper part of the water tank 11, a stable thermal stratification is formed in the water tank 11. The heated low-temperature spray water at the upper part is lifted to the top shower 4 through the floating water pump 10 through the floating suction port 9, and sprayed out by the shower 4 to complete a cycle. Due to the different temperature of the water body in the water tank 11, thermal stratification is naturally formed, which saves the initial investment, operating cost and energy consumption of the water pump. The evaporative condenser reduces the amount of spraying water, saving the initial investment and operating costs of the spraying water pump 10; at the same time, it saves the cooling tower, reduces the head of the water pump, reduces the energy consumption of the spraying water pump 10, and makes the structure more compact .

In the air circuit, the air is close to the saturated state after the filler 6 exchanges heat with the spray water, and after being reheated, it can absorb more heat, its enthalpy value increases, and the enthalpy difference increases. The air is driven by the fan 1 at the top of the housing 2, enters the housing 5 through the air inlet 13 embedded with the louvers 7 in the lower part of the housing 2, passes through the filler 6, and exchanges heat with the spray water, the air temperature rises, and the enthalpy value raised. After passing through the rain zone between the filler 6 and the coil 5, the air that is close to saturation enters into the coil 5. Due to the high temperature of the hot fluid in the coil 5, the nearly saturated air is heated again, and the ability of the air to carry heat increases, taking away the heat of the refrigerant in the coil 5, and the enthalpy continues to rise. Due to the action of the fan 1, the air in the casing 2 is finally discharged outside the casing 2, and the enthalpy difference between the air entering and leaving the casing is large.

In the present invention, the upper evaporative condenser and the lower water-cooled condenser are connected in series, and the refrigerant passes through the coil and the finned coil in turn, and is cooled twice; the air passes through the filler and the coil in turn, and takes away the spray water and the cooling in the coil respectively. The heat of the agent is heated twice, and the enthalpy difference increases; after the spray water is cooled down, due to the action of the water diversion plate, the thermal fluid in the fin coil is first cooled; the water body in the tank uses the principle of different water temperature and different density to form Stable thermal stratification; the shower draws hot water from the upper part of the sink through the floating water outlet.

Example 2

This embodiment is basically the same as Embodiment 1, the difference is that the inclined guide portion 15 includes four inclined surfaces, which form a quadrangular pyramid, the middle of which is high and the two ends are low, and the middle protrudes toward the bottom of the filler. The straight part 16 is connected to the end of the guide part and is located on both sides of the shell. The gap 14 between the vertical part and the shell forms a spray water channel. The water distributor 17 at the bottom of the coil pipe 12 is shown in Figures 5, 6 and 7. Under the guiding effect of the water diversion plate 8, the low-temperature spray water evenly flows to the bottom of the fin coil 12 firstly through the orifice water distributor.

Example 3

This embodiment is basically the same as Embodiment 1, the difference is that the inclined guide part 15 of the water guide plate is inclined from one side of the housing to the other side, the vertical part 16 is connected to the end of the guide part, and the vertical part 16 The gap 14 between the housing and the housing forms a spray water channel. As shown in Figures 8, 9, and 10. Under the guidance of the water guide plate 8 , the low-temperature spray water first flows to the bottom of the fin coil 12 .

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims (8)

1. A large enthalpy difference evaporative cooling water cooling device, characterized in that it comprises: a casing with an upper opening and a sealed bottom, a fan positioned at the upper opening of the casing, and inside the casing from top to bottom are sequentially provided with towers for collecting The water eliminator for entraining droplets in the air flow, the sprinkler for spraying spray water, the coil pipe under the sprayer, the filler for increasing the heat exchange area between spray water and air, and the spray water for spraying The water guide plate at the bottom of the finned coil, the finned coil with fins outside the tube, and the water tank at the bottom of the shell are given priority. The coil packing forms an evaporative condenser, and the finned coil and the water tank form a water-cooled condenser. The shell between the filler and the water guide plate is provided with an air inlet with embedded louvers, the end of the coil is connected to the beginning of the finned coil, and the end of the finned coil is connected to the beginning of the coil through the refrigerant source, so that The coil, the finned coil and the refrigerant source form a refrigerant circuit; the sprinkler, the spray pump and the water outlet in the sink are connected by pipelines to form a spray water circuit, and the nozzle of the sprinkler is located in the water eliminator Between the coil and towards the coil, the water guide plate includes an inclined guide part and a vertical part whose end is located below the finned coil and leaves a gap with the shell. 2. The large enthalpy difference evaporative cooling water cooling device according to claim 1, characterized in that: the inclined guide part of the water guide plate forms a protrusion that is high in the middle and low in both ends and protrudes toward the bottom of the packing, and the vertical part Accepted at the end of the guide part and located on both sides inside the housing, the gap between the vertical part and the housing forms a spray water channel. 3 . The large enthalpy difference evaporative cooling water cooling device according to claim 2 , wherein the inclined guide portion includes four inclined surfaces, and the protrusion formed by them is a quadrangular pyramid. 4 . 4. The large enthalpy difference evaporative cooling water cooling device according to claim 2, characterized in that: the inclined guide part includes two inclined surfaces, and the junction of the two inclined surfaces is an intersection line parallel to the bottom of the housing. 5. The large enthalpy difference evaporative cooling water cooling device according to claim 1, characterized in that: the inclined guide part of the water guide plate is inclined from one side of the housing to the other side, and the vertical part is connected to the guide part The end, the gap between the vertical part and the housing forms a spray water channel. 6. The large enthalpy difference evaporative cooling water cooling device according to claim 1, characterized in that: the filler is plastic oblique wave interlaced filler. 7. The large enthalpy difference evaporative cooling water cooling device according to claim 1, characterized in that: the water pump is a floating water port, which floats on the liquid surface of the water tank. 8. The large enthalpy difference evaporative cooling water cooling device according to claim 1, characterized in that: a water distributor is provided under the fin coil.