Low-temperature countercurrent air-cooled condensing unit

Abstract

An air inlet is formed in the inner side wall of a condensing unit body, an air humidification module is arranged close to the air inlet, a water storage tank is correspondingly arranged below the air humidification module, and a circulating pump and a pipeline are arranged in cooperation with the water storage tank. The pipeline extends to the upper part or the inner part of the air humidifying module to humidify the air humidifying module; the fin curtain tube condensation heat exchanger is arranged above the air humidification module, and a gaseous working medium inlet and a liquid working medium outlet are formed in the fin curtain tube condensation heat exchanger; a fan system is arranged in the air outlet bin, and the periphery or the top of the air outlet bin is open or semi-open.

Description

Technical Field

[0001] The invention belongs to the technical field of air-cooled condensing units, and in particular relates to an anti-dirt and anti-scaling, low-temperature countercurrent air-cooled condensing unit. Background Art

[0002] At present, there are generally two types of air-cooled condensing units. One is a conventional air-cooled condensing unit. The condensing temperature of this type of working fluid is more than 10°C higher than the ambient dry-bulb temperature. The condensing temperature is relatively high. Under the same working conditions, the compressor pressure ratio is large, and the system energy consumption is high. The other type of air-cooled condensing unit is to install a water atomization device at the air inlet of the unit. The condensing temperature of this type of unit is generally more than 10°C higher than the ambient wet-bulb temperature. A lower condensing temperature can be obtained. Under the same working conditions, the compressor pressure ratio is small and the system energy consumption is low. However, when the atomized water droplets evaporate on the fin curtain tube condensing heat exchanger, the minerals in the water remain on the fin curtain, causing the fin curtain to scale, the heat transfer coefficient to decrease, and the unit performance to decay quickly. The fin curtain tube condensing heat exchangers of the above two units are directly exposed to the atmosphere. When the unit is running, dust and debris can easily adhere to the heat exchanger with the airflow, causing the heat exchanger to be dirty and blocked, affecting the condensation effect.

[0003] In summary, the current use of air-cooled condensing units has problems such as high energy consumption, low system efficiency, high condensing temperature, easy dirt and clogging, easy scaling, and rapid performance degradation. Technical personnel in this field urgently need to improve this type of equipment. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a low-temperature countercurrent air-cooled condensing unit, the purpose of which is to solve the problems pointed out in the background technology.

[0005] The technical solution adopted by this technical solution to solve its technical problems is: A low-temperature countercurrent air-cooled condensing unit, comprising a condensing unit body, a fan system, an air outlet bin, an air humidification module, an air inlet, and a finned curtain tube condensing heat exchanger; The air inlet is arranged on the inner side wall of the condensing unit body, and an air humidification module is arranged near the air inlet. A water storage tank is arranged correspondingly below the air humidification module, and a circulation pump and a pipeline are arranged in conjunction with the water storage tank. The pipeline extends to the top or inside of the air humidification module to humidify it. The finned curtain tube condensation heat exchanger is arranged above the air humidification module, and a gaseous working medium inlet and a liquid working medium outlet are arranged on the finned curtain tube condensation heat exchanger; A fan system is arranged inside the air outlet bin, and the four sides or the top of the air outlet bin are open or semi-open.

[0006] The air humidification modules are at least two groups and are arranged vertically symmetrically.

[0007] A spray head is arranged at the end of the pipeline, and the spray head is arranged toward the air humidification module; the air humidification module is an evaporative heat dissipation filler or a wet curtain humidifier.

[0008] The fin curtain tube condensing heat exchanger is placed horizontally.

[0009] High-pressure chambers are provided at both ends of the air humidification module, a high-pressure fan is provided inside the high-pressure chamber, the high-pressure fan is arranged toward the fin curtain gap inside the air humidification module, a vertical baffle is provided in the middle of the air humidification module, impurity removal gaps are respectively provided on the left and right sides of the vertical baffle, and an external discharge port is provided at the bottom of the impurity removal gap.

[0010] The air outlet bin includes a frame, the periphery of the frame is an open design, a ventilation valve is arranged on the top of the frame, the ventilation valve includes a fixing part and a driving part, a vent is arranged on the fixing part, a driven part is arranged on the driving part to cooperate with the vent, and the driving part is connected to the driving device to prompt the driving part to move and realize whether the vent is blocked or not.

[0011] Through the above structural arrangement, compared with the prior art, the beneficial effects of the low-temperature countercurrent air-cooled condensing unit are as follows: the air inlet is arranged on the inner side wall of the condensing unit body, an air humidification module is arranged near the air inlet, a water storage tank is arranged correspondingly below the air humidification module, a circulating pump and a pipeline are arranged in conjunction with the water storage tank, and the pipeline extends to the top or inside of the air humidification module to humidify it; a fin curtain tube condensation heat exchanger is arranged above the air humidification module, and a gaseous working fluid inlet and a liquid working fluid outlet are arranged on the fin curtain tube condensation heat exchanger; a fan system is arranged inside the air outlet bin, and the four sides or the top of the air outlet bin are open or semi-open. After the above structural settings, 1. After the air entering the unit is humidified by the air humidification module, the air temperature is reduced to close to the ambient wet-bulb temperature, which can effectively reduce the condensation temperature of the working medium flowing through the fin curtain tube heat exchanger tube, and improve the system efficiency; 2. The condensation temperature of the unit is reduced, the compression ratio of the compressor is reduced under the same working conditions, and the power consumption of the compressor is reduced; 3. The unit is equipped with an air humidification module to purify the air, prevent dust and debris from adhering to the fin curtain tube condensation heat exchanger with the air flow, avoid the heat exchanger from being dirty and blocked, and can also achieve high-pressure cleaning of the air humidification module; 4. The air humidification module also has the functions of diversion and water blocking, and no small water droplets enter the unit, which can avoid scaling of the fin curtain tube condensation heat exchanger and effectively alleviate the performance degradation of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main internal structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention from a side view; Figure 3 This is a schematic diagram of the top surface structure of the air outlet bin; Figure 4 This is a schematic diagram of the structure of the air outlet bin drive unit; In the accompanying drawings, 1. condensing unit body, 11. fin curtain tube condensing heat exchanger, 12. liquid working medium outlet, 13. gaseous working medium inlet, 2. fan system, 21. fan blades, 3. air outlet bin, 31. frame, 32. fixed part, 33. closed area, 34. vent, 35. driving part, 36. frame, 37. driven part, 38. driven gear, 4. sprinkler head, 5. air humidification module, 51. fin curtain, 52. baffle, 53. debris removal gap, 54. external outlet, 6. air inlet, 7. water storage tank, 8. circulating pump, 81. pipeline, 9. driving motor, 91. driving gear, 92. motor fixing bracket. DETAILED DESCRIPTION

[0013] The present invention is described in detail below through specific embodiments. People who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification; however, it should be pointed out that the following specific implementation methods do not technically limit the present technical solution. Under the guidance of the following technical solution, those skilled in the art can also make further technical extensions. The scope of protection of this patent application shall be subject to the claims.

[0014] Embodiment 1: A low temperature countercurrent air-cooled condensing unit, such as Figure 1 As shown, it includes a condensing unit body 1, a fan system 2, an air outlet bin 3, an air humidification module 5, an air inlet 6, and a fin curtain tube condensing heat exchanger 11.

[0015] The air inlet 6 is arranged on the inner side wall of the condensing unit body 1, and an air humidification module 5 is arranged near the air inlet 6. In this embodiment, the air humidification modules 5 are at least two groups and are arranged vertically symmetrically. A water storage tank 7 is correspondingly arranged below the air humidification module 5, and a circulation pump 8 and a pipeline 81 are arranged in conjunction with the water storage tank 7. The pipeline 81 extends from the left and right sides to the top of the air humidification module 5. A plurality of spray heads 4 are arranged at the end of the pipeline 81, and the spray heads 4 are arranged toward the air humidification module 5; the air humidification module 5 is an evaporative heat dissipation filler or a wet curtain humidifier. This embodiment adopts a spiral wet curtain humidifier, which is arranged at intervals by a plurality of fin curtains 51. After the airflow enters the equipment through the air inlet 6, it is humidified isotropically by the air humidification module 5; the fin curtain tube condensation heat exchanger 11 is arranged above the air humidification module 5, such as Figure 2As shown, there are multiple finned tube condensing heat exchangers 11 arranged horizontally, and each finned tube condensing heat exchanger 11 is provided with a gaseous working medium inlet 13 and a liquid working medium outlet 12. The gaseous medium enters the finned tube condensing heat exchanger 11 and is condensed, and the obtained condensed water is discharged through the liquid working medium outlet 12.

[0016] After the above structure is set, the airflow enters the air humidification module 5 through the air inlet 6 and after isenthalpic humidification, the air temperature is reduced to close to the ambient wet-bulb temperature. This cooling can effectively reduce the condensation temperature of the working medium flowing through the fin curtain tube heat exchanger 11 tube, thereby improving the system efficiency; when the condensation temperature of the unit is reduced, the compression ratio of the compressor is reduced under the same working conditions, and the power consumption of the compressor is reduced; furthermore, the installation of the air humidification module 5 can purify the air entering the interior of the equipment, prevent dust and debris from adhering to the fin curtain tube condensation heat exchanger with the airflow, avoid dirt and blockage of the heat exchanger, and realize high-pressure cleaning of the air humidification module; the air humidification module 5 also has the functions of diversion and water blocking, and no fine water droplets enter the interior of the unit, which can avoid scaling of the fin curtain tube condensation heat exchanger and effectively alleviate the performance degradation of the heat exchanger.

[0017] The air outlet bin 3 is arranged on the top of the condensing unit body 1, and a fan system 2 is arranged inside the air outlet bin 3. The four sides of the air outlet bin 3 are in an open state, and the top of the air outlet bin 3 is in a semi-open state. The top of the air outlet bin 3 is designed to be in a semi-open state in order to use the top surface of the air outlet bin 3 as an exhaust port when necessary. When it is rainy or snowy outside, in order to ensure the cleanliness of the air outlet bin 3 and the inside of the condensing unit body 1, the present invention can realize the closure of the top surface of the air outlet bin 3. The specific driving structure is as follows: Figure 3 , 4 As shown, the air outlet bin 3 includes a frame 31, the periphery of the frame 31 is an open design, and a ventilation valve is arranged on the top of the frame 31. The ventilation valve includes a circular fixing portion 31 and a driving portion 35. The fixing portion 31 is evenly provided with a plurality of closed areas 33 and vents 34, and the closed areas 33 and vents 34 are arranged at intervals; a driven component 37 is arranged on the driving portion 35 to cooperate with the vents 34, and the driven component 37 rotates on the fixing portion 31 to realize the relative rotation of the two, and a frame 36 is arranged on the periphery of the driven component 37, and a driven tooth 38 is arranged on the frame 36. A motor fixing frame 92 is also arranged on the frame 31, and a driving motor 9 is fixed on the motor fixing frame 92. A driving gear 91 is arranged on the top of the driving motor, and the driving motor 9 drives the driving gear 91 to rotate, and at the same time drives the driven component 37 and the vent 34 to be blocked or not, thereby realizing axial ventilation.

[0018] When necessary, the above structure can be used to increase the ventilation volume and improve the cooling efficiency.

[0019] Embodiment 2: Based on Embodiment 1, the present invention realizes humidification of the air flow inside the condensing unit body 1 and the blocking of impurities by setting an air humidification module 5. However, this operation mode will block all external impurities on the air humidification module 5. After long-term use, the ventilation rate of the air humidification module 5 will be reduced. In order to avoid the above problems, Figure 2 As shown, the technical solution is provided with a high-pressure chamber 10 at both ends of the air humidification module, and a plurality of high-pressure fans 101 are arranged inside the high-pressure chamber 10. The high-pressure fans 101 are arranged toward the gap of the fin curtain 51 inside the air humidification module 5, and a vertical baffle 52 is arranged in the middle of the air humidification module 5. The left and right sides of the vertical baffle 52 are respectively provided with impurity removal gaps 53, and the bottom of the impurity removal gap 53 is provided with an external discharge port 54. Through the above structural arrangement, the external discharge port 54 can be connected to an external collecting device or a negative pressure collecting device. When the low-temperature countercurrent air-cooled condensing unit is in a non-working state, the plurality of high-pressure fans 101 arranged inside the high-pressure chamber 10 are started in a pulse state, and the impurities in the gap of the fin curtain 51 are blown out by the high-pressure fans 101 and diverted downward at the impurity removal gap 53 and discharged.

[0020] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A low-temperature countercurrent air-cooled condensing unit, characterized in that: It includes a condensing unit body, a fan system, an air outlet bin, an air humidification module, an air inlet, and a finned curtain tube condensing heat exchanger; The air inlet is arranged on the inner side wall of the condensing unit body, and an air humidification module is arranged near the air inlet. A water storage tank is arranged correspondingly below the air humidification module, and a circulation pump and a pipeline are arranged in conjunction with the water storage tank. The pipeline extends to the top of or inside the air humidification module to humidify it; high-pressure chambers are arranged at both ends of the air humidification module, a high-pressure fan is arranged inside the high-pressure chamber, and the high-pressure fan is arranged toward the fin curtain gap inside the air humidification module. A vertical baffle is arranged in the middle of the air humidification module, and impurity removal gaps are arranged on the left and right sides of the vertical baffle, respectively, and an external discharge port is arranged at the bottom of the impurity removal gap; The finned curtain tube condensation heat exchanger is arranged above the air humidification module, and a gaseous working medium inlet and a liquid working medium outlet are arranged on the finned curtain tube condensation heat exchanger; A fan system is arranged inside the air outlet bin, and the four sides or the top of the air outlet bin are open or semi-open.

2. The low-temperature countercurrent air-cooling condensing unit according to claim 1, characterized in that: The air humidification modules are at least two groups and are arranged vertically symmetrically.

3. The low-temperature countercurrent air-cooling condensing unit according to claim 1, characterized in that: A spray head is arranged at the end of the pipeline, and the spray head is arranged toward the air humidification module; the air humidification module is an evaporative heat dissipation filler or a wet curtain humidifier.

4. The low-temperature countercurrent air-cooling condensing unit according to claim 1, characterized in that: The fin curtain tube condensing heat exchanger is placed horizontally.

5. The low-temperature countercurrent air-cooling condensing unit according to claim 1, characterized in that: The air outlet bin includes a frame, the periphery of the frame is an open design, a ventilation valve is arranged on the top of the frame, the ventilation valve includes a fixing part and a driving part, a vent is arranged on the fixing part, a driven part is arranged on the driving part to cooperate with the vent, and the driving part is connected to the driving device to prompt the driving part to move and realize whether the vent is blocked or not.

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