Evaporative condenser unit

Abstract

The application provides an evaporative condensing unit, which organically combines a coil heat exchange module and a fin heat exchange module, can effectively balance the refrigeration mode of the unit under dry and wet working conditions, and makes the unit two-stage cooling under dry and wet working conditions, improves the cooling efficiency of the unit, and improves the switching temperature of the dry and wet working conditions, thereby improving the energy efficiency of the unit. The coil heat exchange module and the fin heat exchange module are communicated, and a fluid flows through the coil heat exchange module and the fin heat exchange module in sequence. Under dry working conditions, the fin heat exchange module plays a main heat exchange role, and the coil heat exchange module plays a role of supplementing cold capacity, and the cold energy of the low-temperature air of the environment is fully utilized. Under wet working conditions, the coil heat exchange module plays a main heat exchange role, and the fin heat exchange module plays a precooling role. The characteristics of the fin heat exchange module under dry conditions and the advantages of the coil heat exchange module under wet conditions are fully utilized, a balance point between dry and wet working conditions is found, and the effect of improving the switching temperature of the dry and wet working conditions is finally achieved, and the system energy efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, and in particular to an evaporative condenser unit. Background Technology

[0002] Traditional evaporative condensers offer energy savings and emission reduction, but they also have some drawbacks during use. A key issue is that while theoretically the low ambient temperature (e.g., 25°C) can cool the hot fluid, evaporative condensers are designed for spray operation. Therefore, spraying only stops when the ambient temperature is very low (e.g., 5°C), failing to fully utilize the sensible heat of the ambient air. Furthermore, the system resistance is higher under spray operation, resulting in greater system input work and water consumption.

[0003] Therefore, this also leads to the problem of low switching temperatures between dry and wet operating conditions in existing evaporative condensers. Since the coils in existing evaporative condensers mostly use bare tubes, the air-side heat exchange area is small. Only when the ambient temperature is very low can the large temperature difference compensate for the insufficient heat exchange area. Considering the system's ventilation resistance, finned heat exchangers are generally not suitable for spray conditions (i.e., wet conditions). In general, to increase the heat exchange capacity under dry conditions, fins need to be added; to reduce ventilation resistance under spray conditions, fins need to be reduced or eliminated; these two options are irreconcilable. Summary of the Invention

[0004] In view of this, this application provides an evaporative condenser unit that finds a balance between increasing and decreasing fins, ultimately achieving the effect of increasing the switching temperature between dry and wet conditions and improving system energy efficiency.

[0005] This application provides an evaporative condenser unit, comprising:

[0006] A coil heat exchange module, wherein the coil heat exchange module has an inlet end into which heating fluid flows;

[0007] A finned heat exchange module that uses external cold air for cooling, wherein the coil heat exchange module is connected to the finned heat exchange module, and the finned heat exchange module has an outlet end for the cooling fluid to flow out.

[0008] A water distributor is used to spray water to cool the coil heat exchange module.

[0009] A water storage tank is connected to the water distributor to supply water to the water distributor, and the spray water sprayed by the water distributor cools the coil heat exchange module and then flows into the water storage tank.

[0010] The hot fluid flowing in through the inlet end first undergoes a cooling process in the coil heat exchange module, then flows into the fin heat exchange module for another cooling process, becoming a cold fluid, and then flows out through the outlet end.

[0011] In one embodiment, it further includes: a housing; the water distributor, the coil heat exchange module, and the water storage tank are sequentially arranged in the housing along a first direction, and the water storage tank is arranged corresponding to the coil heat exchange module;

[0012] A water pump is provided between the water distributor and the water storage tank.

[0013] In one embodiment, the finned heat exchange module is disposed on the side wall of the housing to exchange heat with external cold air;

[0014] An isolation element is provided between the finned heat exchange module and the coil heat exchange module.

[0015] In one embodiment, multiple finned heat exchange modules are provided.

[0016] In one embodiment, the system further includes a fan; the fan is located at the top of the housing and is used to provide power for airflow within the housing.

[0017] In one embodiment, it further includes: a filter screen; the filter screen is located between the fan and the water distributor, and is used to filter particulate matter in the air entering the housing.

[0018] In one embodiment, it further includes: a water collector; the water collector is located between the filter and the water distributor, and is used to collect particulate droplets in the air flowing out of the housing.

[0019] In one embodiment, the hot air after heat exchange in the finned heat exchange module flows to the coil heat exchange module to accelerate the evaporation of moisture on the surface of the coil of the coil heat exchange module.

[0020] In one embodiment, the coil of the coil heat exchange module is a bare tube or a finned tube.

[0021] In one embodiment, the finned heat exchange module is a finned tube heat exchanger, a tube-fin heat exchanger, or a plate-fin heat exchanger.

[0022] In summary, this application provides an evaporative condensing unit that organically combines a coil heat exchange module and a finned heat exchange module. This effectively balances the unit's cooling mode under both dry and wet conditions, enabling two-stage cooling in both environments and improving cooling efficiency. The coil and finned heat exchange modules are connected; the hot fluid is first cooled in the coil module and then flows into the finned module for further cooling. In dry conditions, the finned module plays the primary heat exchange role, while the coil module supplements the cooling capacity, fully utilizing the cold energy of the ambient low-temperature air. In wet conditions, the coil module plays the primary heat exchange role, while the finned module pre-cools the system. This fully leverages the dry-state characteristics of the finned module and the wet-state advantages of the coil module, finding a balance between dry and wet conditions and ultimately improving the switching temperature between dry and wet states, thus enhancing system energy efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the evaporator-condenser unit, which is an example of the structure of this application. Detailed Implementation

[0024] Before describing the embodiments in detail, it should be understood that this application is not limited to the detailed structures or element arrangements described below or in the accompanying drawings. This application can be implemented in other ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes only and should not be construed as limiting. The terms "comprising," "including," "having," and similar expressions used herein mean to include the items listed thereafter, their equivalents, and other additional items. In particular, when describing "an element," this application does not limit the number of elements to one, but may include multiple elements.

[0025] Please refer to Figure 1 As shown, this application provides an evaporative condenser unit 10 based on evaporative condensation technology. Compared with traditional evaporative condensers, the evaporative condenser unit 10 of this application can make full use of the cooling capacity of the sensible heat portion in the ambient low-temperature air, find a balance point between dry and wet conditions, and find a balance point between increasing and decreasing fins, thereby achieving the effect of improving the switching temperature between dry and wet conditions and improving system energy efficiency.

[0026] Specifically, the evaporative condenser unit 10 includes a casing 12, a fan 14, a filter screen, a water collector, a water distributor 16, a coil heat exchange module 18, a finned heat exchange module 20, and a water storage tank 22.

[0027] The coil heat exchange module 18 has an inlet end 24 (first inlet, referred to as inlet end 24) and a first outlet 26. The finned heat exchange module 20 is cooled by external cold air. The finned heat exchange module 20 also has a second inlet 28 and an outlet end 30 (second outlet, referred to as outlet end 30). The first outlet 26 and the second inlet 28 are connected by a connecting pipe 32, that is, the coil heat exchange module 18 and the finned heat exchange module 20 are connected, and the coil heat exchange module 18 and the finned heat exchange module 20 are in fluid communication. The inlet end 24 can be connected to the outside of the housing 12 to allow the hot fluid G to flow in, and the outlet end 30 can be connected to the outside of the housing 12 to allow the cold fluid L to flow out. The hot fluid G flowing in through the inlet end 24 is first cooled once in the coil heat exchange module 18, and then flows into the finned heat exchange module 20 to be cooled again, becoming cold fluid L, and then flows out through the outlet end 30. The hot fluid G is, for example, a high-temperature liquid condensate, and the cold fluid L is, for example, a low-temperature liquid condensate; the specific type is not limited. The water storage tank 22 is connected to the water distributor 16 to supply water to the water distributor 16. The water distributor 16 sprays water to cool the coil heat exchange module 18, and the sprayed water from the water distributor 16 flows into the water storage tank 22 after cooling the coil heat exchange module 18, thereby allowing the water to be recycled within the evaporative condenser unit 10.

[0028] In this embodiment, the coil heat exchange module 18 and the finned heat exchange module 20 are organically combined, which can effectively balance the cooling mode of the unit under dry and wet conditions, and enable the unit to perform two-stage cooling in both dry and wet conditions, thereby improving the unit's cooling efficiency. In dry conditions, the finned heat exchange module 20 plays the main role in heat exchange, while the coil heat exchange module 18 plays a supplementary cooling role. In wet conditions, the coil heat exchange module 18 plays the main role in heat dissipation, while the finned heat exchange module 20 plays a pre-cooling role. The coil heat exchange module 18 and the finned heat exchange module 20 each perform their respective functions under their respective conditions, making full use of the cold energy in the sprayed water and the external cold air, leveraging their respective characteristics to ultimately achieve the effect of increasing the temperature switching between dry and wet conditions, thereby improving system energy efficiency.

[0029] It should be noted that the dry and wet operating conditions mentioned in this article refer to the dry and wet operating conditions of the evaporative condensing unit 10. The evaporative condensing unit 10 has a switching temperature for dry and wet operating conditions. Specifically: when the ambient temperature is lower than the switching temperature, the evaporative condensing unit 10 enters the dry operating condition. At this time, the external cold air contains a lot of cooling capacity, and the evaporative condensing unit 10 can make full use of the cooling capacity of the external cold air for cooling. After entering the dry operating mode, the water distributor 16 stops working and cuts off the water supply. The finned heat exchange module 18 is mainly used to exchange heat with the external cold air for cooling. The coil heat exchange module 18 uses the external cold air to supplement the cooling capacity. When the ambient temperature is higher than the switching temperature, the evaporative condenser unit 10 enters the wet state. At this time, the cold air outside contains limited cold energy. The evaporative condenser unit 10 makes full use of the cold energy of the spray water for cooling. After entering the wet working mode, the water distributor 16 works to spray water onto the coil heat exchange module 18. The coil heat exchange module 18 plays the main role in heat dissipation, and the fin heat exchange module 20 uses the outside cold air to play a pre-cooling role.

[0030] In this embodiment, the switching temperature can be increased to, for example, 10°C. Compared to traditional evaporative condensers that stop spraying only when the ambient temperature reaches 5°C, the evaporative condenser unit 10 of this application combines the coil heat exchange module 18 and the fin heat exchange module 20, finding a balance between dry and wet operating conditions, increasing the switching temperature between dry and wet conditions, and thus improving system energy efficiency. In addition, both dry and wet conditions involve two-stage cooling, improving the unit's cooling efficiency.

[0031] Since this application organically combines the coil heat exchange module 18 and the finned heat exchange module 20, it can effectively balance the cooling mode of the unit under dry and wet conditions. Therefore, there are no major restrictions on the types of the coil heat exchange module 18 and the finned heat exchange module 20. For example, the coil of the coil heat exchange module 18 can be a bare tube, a finned tube, etc., and the finned heat exchange module 20 can be a finned tube heat exchanger, a tube-fin heat exchanger, or a plate-fin heat exchanger, etc. All of these can achieve the balance of the unit's cooling mode under dry and wet conditions and improve the switching temperature between dry and wet conditions to varying degrees.

[0032] The fan 14, filter screen, water collector, water distributor 16, coil heat exchange module 18, and water storage tank 22 are arranged sequentially in the casing 12 along the first direction, and the water storage tank 22 is arranged corresponding to the coil heat exchange module 18; wherein, the first direction refers to the direction of gravity, that is, vertically downward.

[0033] In the illustrated embodiment, the fan 14 is disposed on the top of the housing 12 to provide power for the airflow inside the housing 12. This allows the air inside the housing 12 to circulate, meaning the fan 14 provides power to drive the airflow within the housing 12. By drawing air upwards with the fan 14, the air inside the housing 12 is forced to flow rapidly, promoting the evaporation of moisture on the surface of the heat exchange module and absorbing heat, thereby accelerating heat exchange and achieving a certain cooling effect. For example, two fans 14 are provided, spaced apart on the top of the housing 12, to further accelerate the airflow within the housing 12.

[0034] The water distributor 16 and the coil heat exchange module 18 are sequentially arranged inside the casing 12 along the first direction, that is, the water distributor 16 is located above the coil heat exchange module 18. Please refer to [link / reference]. Figure 1 As shown, the water storage tank 22 is located at the bottom of the casing 12 and corresponds to the coil heat exchange module 18. The spray water from the water distributor 16 cools the coil heat exchange module 18 and then falls into the water storage tank 22 under its own gravity. A water pump 34 is provided between the water distributor 16 and the water storage tank 22. Specifically, the water storage tank 22 and the water distributor 16 are connected by a water guide pipe 36. The water pump 34 is installed on the water guide pipe 36 to guide the water in the water storage tank 22 to the water distributor 16 through the water guide pipe 36, thus realizing the recycling of water within the unit.

[0035] In some embodiments, the evaporative condenser unit 10 further includes a water replenishment pump, which is activated to add water to the water storage tank 22 when the water in the water storage tank 22 is less than a preset standard amount.

[0036] The finned heat exchange module 20 is disposed on the side wall of the housing 12 for heat exchange with external cold air. For example, an installation port is provided on the side wall of the housing 12, and the finned heat exchange module 20 is installed in the installation port. The coil heat exchange module 18 is located in the middle position inside the housing 12 and corresponds to the upper area of ​​the finned heat exchange module 20. Preferably, an isolation member 38 is also provided between the finned heat exchange module 20 and the coil heat exchange module 18. The isolation member 38 can act as a shield to prevent spray water from spraying onto the finned heat exchange module 20 and affecting heat exchange. At the same time, the isolation member 38 also plays a certain role in water collection. Some of the spray water sprayed onto the isolation member 38 falls into the water storage tank 22 due to its own gravity.

[0037] In the illustrated embodiment, the isolator 38 extends from the upper edge of the mounting port into the housing 12 for a distance and then downwards. The bottom end of the isolator 38 is located in the middle of the finned heat exchange module 20 and at the bottom of the coil heat exchange module 18. Please refer to... Figure 1As shown by the dashed line, with this configuration, when the unit is in a humid operating condition, the external air is heated by the finned heat exchange module 20, and the relative humidity is reduced. The heated air after heat exchange flows from the bottom of the coil heat exchange module 18 through the coil heat exchange module 18 to accelerate the evaporation of moisture on the surface of the coil of the coil heat exchange module 18 and improve the utilization efficiency of air enthalpy and humid energy.

[0038] Multiple finned heat exchange modules 20 can be set according to actual design requirements. In this embodiment, two finned heat exchange modules 20 are set. The two finned heat exchange modules 20 are respectively set on opposite side walls of the housing 12. Correspondingly, the first outlet 26 of the coil heat exchange module 18 is connected to the second inlet 28 of the two finned heat exchange modules 20. The outlet ends 30 of the two finned heat exchange modules 20 are merged and connected to the outside of the housing 12 through pipelines.

[0039] In the illustrated embodiment, a filter screen can be disposed between the fan 14 and the water distributor 16 to filter particulate matter in the air entering the housing, preventing large debris from falling into the housing 12 and causing contamination. A water collector can be disposed between the filter screen and the water distributor 16 to collect particulate droplets in the air flowing out of the housing 12, preventing water loss from the unit.

[0040] In summary, this application provides an evaporative condensing unit that organically combines a coil heat exchange module and a finned heat exchange module, which can effectively balance the cooling mode of the unit under dry and wet conditions, and enable the unit to perform two-stage cooling under both dry and wet conditions, thereby improving the unit's cooling efficiency. The coil heat exchange module is connected to the finned heat exchange module. The fluid flows sequentially through the coil heat exchange module and the finned heat exchange module. That is, the hot fluid flowing into the evaporator-condenser unit is first cooled down in the coil heat exchange module and then cooled down again in the finned heat exchange module. Under dry conditions, the finned heat exchange module plays the main heat exchange role, while the coil heat exchange module plays a supplementary role in cooling, making full use of the cold energy of the ambient low-temperature air. Under wet conditions, the coil heat exchange module plays the main heat exchange role, while the finned heat exchange module plays a pre-cooling role. By fully utilizing the characteristics of the finned heat exchange module in dry conditions and the advantages of the coil heat exchange module in wet conditions, a balance point is found between dry and wet conditions, ultimately achieving the effect of improving the switching temperature between dry and wet conditions and improving system energy efficiency.

[0041] The concepts described herein may be implemented in other forms without departing from their spirit and characteristics. The specific embodiments disclosed should be considered illustrative rather than restrictive. Therefore, the scope of this application is determined by the appended claims, and not by the preceding description. Any changes within the literal meaning and equivalent scope of the claims should fall within the scope of those claims.

Claims

1. An evaporative condenser unit, characterized in that, include: A coil heat exchange module, wherein the coil heat exchange module has an inlet end into which heating fluid flows; A finned heat exchange module that uses external cold air for cooling, wherein the coil heat exchange module is connected to the finned heat exchange module, and the finned heat exchange module has an outlet end for the cooling fluid to flow out. A water distributor is used to spray water to cool the coil heat exchange module. A water storage tank is connected to the water distributor to supply water to the water distributor, and the spray water sprayed by the water distributor cools the coil heat exchange module and then flows into the water storage tank. The housing, the water distributor, the coil heat exchange module, and the water storage tank are sequentially arranged in the housing along the first direction, and the water storage tank is arranged corresponding to the coil heat exchange module. The fin heat exchange module is arranged on the side wall of the housing to exchange heat with the external cold air. A fan, located at the top of the housing, is used to provide power for the airflow inside the housing; The hot fluid flowing in through the inlet end first undergoes cooling in the coil heat exchange module, then flows into the fin heat exchange module for another cooling, becoming a cold fluid, and then flows out through the outlet end; the hot air after heat exchange in the fin heat exchange module flows to the coil heat exchange module to accelerate the evaporation of moisture on the coil surface of the coil heat exchange module.

2. The evaporative condenser unit of claim 1, wherein, A water pump is provided between the water distributor and the water storage tank.

3. The evaporator-condenser unit as described in claim 2, characterized in that, An isolation element is provided between the finned heat exchange module and the coil heat exchange module.

4. The evaporator-condenser unit as described in claim 3, characterized in that, Multiple finned heat exchange modules are provided.

5. The evaporator-condenser unit as described in claim 1, characterized in that, Also includes: Filter screen; The filter screen is located between the fan and the water distributor, and is used to filter particulate matter in the air entering the housing.

6. The evaporator-condenser unit as described in claim 5, characterized in that, Also includes: Water collector; The water collector is located between the filter and the water distributor, and is used to collect particulate droplets in the air flowing out of the housing.

7. The evaporative condensing unit as described in any one of claims 1-6, characterized in that, The coil of the coil heat exchange module is a bare tube or a finned tube.

8. The evaporative condensing unit as described in any one of claims 1-6, characterized in that, The finned heat exchange module is a finned tube heat exchanger, a tube-fin heat exchanger, or a plate-fin heat exchanger.

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