CN113587498A - Supercooling type efficient evaporative condenser - Google Patents
Supercooling type efficient evaporative condenser Download PDFInfo
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- CN113587498A CN113587498A CN202110798220.3A CN202110798220A CN113587498A CN 113587498 A CN113587498 A CN 113587498A CN 202110798220 A CN202110798220 A CN 202110798220A CN 113587498 A CN113587498 A CN 113587498A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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Abstract
The invention belongs to the technical field of refrigeration machinery, and particularly relates to a super-cooling type efficient evaporative condenser which comprises a machine body, wherein an axial flow fan is arranged at the top of the machine body, a water spray pipe group is arranged below the axial flow fan in the machine body, a water tank is arranged at the bottom of the machine body and is communicated with the water spray pipe group through a pipeline, a circulating water pump is arranged in the pipeline to drive the circulation of cooling water, the machine body can be transversely divided into at least two areas, nozzles at the tail end of the water spray pipe group are independently arranged in each area, heat exchangers and fillers are respectively arranged in each area, the heat exchangers are connected in series and have height difference, and the projections in the vertical direction are not overlapped with each other. The invention can lead the refrigerant to exchange heat in at least two stages of heat exchangers through the heat exchangers arranged in a staggered way and spray cooling water mutually and independently, thereby condensing the refrigerant into refrigerant liquid with certain supercooling degree, avoiding the insufficient liquid supply of the expansion valve, improving the evaporation temperature, the refrigerating capacity and the refrigerating energy efficiency of the unit and ensuring the stable operation of the unit.
Description
Technical Field
The invention belongs to the technical field of refrigeration machinery, and particularly relates to a super-cooling type efficient evaporative condenser.
Background
The evaporative condensation type water chilling unit combines the advantages of water-cooling and air-cooling water chilling units, air and circulating water are used as cooling media, and the latent heat of evaporation of circulating cooling water of the evaporative condenser is used for condensing high-temperature and high-pressure gas refrigerant discharged by the compressor, so that the condensing temperature can be reduced by 4-5 ℃ compared with that of the water chilling unit, and the power consumption of a cooling water pump can be saved. Compared with a conventional water cooling system water cooling unit, a cooling water pump and a cooling tower, the evaporative condensation type water cooling unit has the advantages that the refrigeration energy efficiency of the unit can be improved by about 20%; compared with an air cooling unit, the unit refrigeration energy efficiency can be improved by about 60 percent, so that the unit is the host type with the highest energy efficiency ratio in the existing refrigeration and air-conditioning systems, can well overcome the defects of high condensation temperature and low refrigeration energy efficiency of the conventional air cooling and water cooling unit, and is widely applied to the fields of medicines, chemical industry, metallurgy and food and beverage.
The evaporative condenser is used as a core component of an evaporative condensation type water chilling unit, generally adopts a coil pipe type structure, circulating cooling water uniformly covers the outer surface of a coil pipe, a large amount of heat emitted by high-temperature and high-pressure refrigerant vapor in the coil pipe in the condensation process can be efficiently taken away through evaporation of the circulating cooling water, and the heat transfer efficiency is high.
The conventional evaporation condensation type water chilling unit in the prior art is low in condensation temperature, the heat exchange pipe diameter of the evaporation condenser is relatively thick so as to facilitate liquid drainage, and due to the influence of the special structure of the evaporation condenser, the temperature of a water film on the surface of the heat exchanger closer to the refrigerant outlet is higher, so that the supercooling degree of high-pressure liquid at the outlet of the evaporation condenser is approximately zero. And when the high-pressure saturated liquid from the liquid reservoir passes through the drying filter, the stop valve, the electromagnetic valve and the high-pressure liquid pipe, local resistance and on-way resistance are inevitably generated, so that the saturated liquid generates a flash evaporation phenomenon, and part of the saturated liquid is changed into saturated gas. Because the volume of the saturated gas is about 40 times of that of the saturated liquid, once a gas refrigerant carried in the high-pressure liquid enters the throttling device, the flow of the refrigerant is seriously influenced, so that the evaporation temperature of a unit is reduced, and the refrigerating capacity and the refrigerating energy efficiency are seriously attenuated; meanwhile, the flash evaporation gas can also cause unstable flow of the liquid refrigerant supplied to the evaporator from the throttling device, even generate the problem of intermittent liquid supply, generate greater risks for the performance of the unit and the running reliability of the compressor, and therefore the stability of the unit is poor.
Prior art ZL201711443621.7, name: the evaporative condenser comprises a water circulation component, wherein the tail end of a water pipeline is provided with a main water pipe and an auxiliary water pipe, and when a coil is cooled, a plurality of auxiliary water pipes effectively cool each part of the coil through a plurality of auxiliary spray headers. Although the problem that the temperature of spray cooling water is higher and higher from top to bottom is solved, when the refrigerant flows out from the bottom of the heat exchanger, the temperature of a water film close to the surface of the heat exchanger at the refrigerant outlet is high, and the supercooling degree of the refrigerant at the outlet of the evaporative condenser is still low.
Disclosure of Invention
The invention aims to provide an efficient evaporative condenser with supercooling, which solves the technical problem that the high-pressure liquid refrigerant at a refrigerant outlet has too low supercooling degree and is easy to cause flash evaporation of saturated liquid refrigerant. The evaporative condenser of the invention fully utilizes the two heat exchangers which are independently and distributed in a staggered way to exchange heat and condense, thereby condensing the refrigerant into refrigerant liquid with certain supercooling degree, avoiding the insufficient liquid supply of the expansion valve, improving the evaporation temperature, the refrigerating capacity and the refrigerating energy efficiency of the unit and further ensuring the stable operation of the unit.
In order to achieve the above objects, in a first aspect of the present invention, there is provided a super-cooling type high efficiency evaporative condenser for exchanging heat by using a certain amount of cooling water and a refrigerant, the condenser comprising a body, an axial flow fan disposed at the top of the body and communicating with the inside of the body, a water spray pipe set disposed below the axial flow fan in the body, a nozzle disposed at the end of the water spray pipe set, a water tank disposed at the bottom of the body and communicating with the water spray pipe set through a pipe, a circulating water pump disposed in the pipe to drive the circulation of the cooling water, the body cavity being divided laterally into a left and a right regions, the nozzle disposed at the end of the water spray pipe set being disposed independently in each region, a heat exchanger and a filler disposed vertically in each region, the heat exchanger and the filler being interchangeable in order according to the requirements, the heat exchangers being connected in series, one end of the series heat exchanger being communicated with a refrigerant inlet disposed on the side wall of the fan, the other end of the series heat exchanger is communicated with a refrigerant outlet arranged on the side wall of the fan, the heat exchangers have height difference and are not overlapped in projection in the vertical direction, the machine body is provided with a plurality of air inlets, and air flows sequentially pass through the air inlets and the interior of the machine body and finally flow to the axial flow fan to form an air flow direction.
In addition, according to the above embodiment of the present invention, the following additional technical features may be provided:
in some embodiments of the present invention, specifically, a plurality of water eliminators are disposed in the body.
Specifically, the machine body is transversely divided into a left area and a right area, wherein a first heat exchanger and a filler II are sequentially arranged in one area from top to bottom, a filler I and a second heat exchanger are sequentially arranged in the other area from top to bottom, the two heat exchangers are connected in series, the other end of the first heat exchanger is communicated with a refrigerant inlet arranged on the side wall of the fan, and the other end of the second heat exchanger is communicated with a refrigerant outlet arranged on the side wall of the fan.
Specifically, the first heat exchanger and the second heat exchanger are preferably arranged on different sides of a vertical axis of the fan.
Specifically, the dehydrator is arranged below the axial flow fan and between two areas.
Specifically, a plurality of air inlets are formed around the axial flow fan at the top of the machine body, and a plurality of air inlets are formed in the side wall of the machine body
Specifically, the machine body above the first heat exchanger is provided with an air inlet, the machine body on the side surfaces of the second heat exchanger, the filler I and the filler II is also provided with an air inlet, and airflow enters the machine body from the air inlets through the operation of the axial flow fan, passes through the first heat exchanger, the second heat exchanger, the filler I and the filler II and finally flows to the axial flow fan, so that airflow direction is formed.
Specifically, the heat exchanger may be a coil type, a plate sheet type structure, or a combination thereof.
Specifically, the heat exchanger can be made of stainless steel, carbon steel, copper, aluminum and various alloy materials mainly made of the above materials.
Specifically, the water spray pipe groups in the regions can share a circulating water pump, can also be independently provided with the circulating water pump, can share a water tank, and can also adopt independent water tanks.
The high-efficiency evaporative condenser with supercooling fully utilizes the two heat exchangers which are independently and distributed in a staggered mode to exchange heat and condense, so that a refrigerant is condensed into refrigerant liquid with a certain supercooling degree, the insufficient liquid supply of an expansion valve is avoided, the evaporation temperature, the refrigerating capacity and the refrigerating energy efficiency of a unit are improved, and the stable operation of the unit is further ensured.
Drawings
Fig. 1 is a three-dimensional schematic diagram of a supercooling-type efficient evaporative condenser of the present invention.
Fig. 2 is a schematic structural diagram of a supercooling-type efficient evaporative condenser of the present invention.
Wherein, 1-axial flow fan; 2-body; 3-a water spraying pipe group; 4-a heat exchanger; 41-a first heat exchanger; 42-a second heat exchanger; 5-a filler; 51-filler I; 52-Filler II; 6-a nozzle; 7-air inlet; 8-a refrigerant inlet; 9-a refrigerant outlet; 10-a water tank; 11-a dehydrator; 12-circulating water pump.
Detailed Description
In the following detailed description of the embodiments of the present invention, it is to be understood that the terms "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and are therefore not to be considered limiting.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "connected," "communicating," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanical connection and electrical connection; may be directly connected, or indirectly connected through an intermediate; there may be communication within two elements or an interaction of two elements unless otherwise expressly limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, a first feature "above", "below" or "on" a second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," or "above" a second feature may be directly on or obliquely above the second feature, or simply indicate that the first feature is at a higher level than the second feature. A first feature may be "under," "beneath," or "beneath" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "under," "beneath," or "beneath" a second feature may be directly under or obliquely below the second feature, or simply mean that the first feature is at a lesser level than the second feature.
In the description herein, it is understood that the description of the terms "one embodiment" or "a particular embodiment," etc., is intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1, in one aspect of the present invention, the present invention provides a supercooling-type high-efficiency evaporative condenser that changes a temperature in a certain space by exchanging heat using a certain amount of cooling water and a refrigerant.
The supercooling type efficient evaporative condenser comprises a body 2, wherein an axial flow fan 1 is arranged at the top of the body 2, and the axial flow fan 1 is communicated with the inside of the body 2. A water spraying pipe group 3 is arranged below an axial flow fan 1 in a machine body 2, a nozzle 6 is arranged at the tail end of the water spraying pipe group 3, a water tank 10 is arranged at the bottom of the machine body 2, the water tank 10 at the bottom is communicated with the water spraying pipe group 3 at the top through a pipeline, and a circulating water pump 12 is arranged in the pipeline, so that cooling water can be pumped at a certain flow rate to circularly flow.
As shown in fig. 2, the internal space of the machine body 2 can be divided into at least a left region and a right region, the nozzles at the ends of the water spraying pipe groups 3 are independently arranged in each region, the spraying cooling water can be independently controlled according to specific requirements, and the water circulating pump 12 can be shared, the water circulating pump can be independently arranged, the water tank 10 can be shared, and the independent water tank can be adopted. The heat exchanger 4 and the filler 5 are respectively arranged in each area, the heat exchanger 4 and the filler 5 are arranged up and down, and the arrangement sequence can be adjusted according to requirements.
The heat exchanger 4 may be a coil type, a plate sheet type structure, or a combination of the above structures. The heat exchanger 4 can be made of stainless steel, carbon steel, copper, aluminum and various alloy materials mainly made of the above materials.
According to a specific embodiment of the invention, a first heat exchanger 41 and a packing II52 can be sequentially arranged in one region from top to bottom, a packing I51 and a second heat exchanger 42 are sequentially arranged in the other region from top to bottom, the first heat exchanger 41 and the second heat exchanger 42 are connected in series, and the first heat exchanger 41 and the second heat exchanger 42 have a height difference and have no overlapping in vertical projection. One end of the first heat exchanger 41 is communicated with a refrigerant inlet 8 arranged on the side wall of the fan 1, and one end of the second heat exchanger 42 is communicated with a refrigerant outlet 9 arranged on the side wall of the fan 1. A certain space is formed between the two areas below the axial flow fan 1, and a plurality of water removers 11 can be arranged. The periphery of the axial flow fan 1 on the top of the machine body 2 can be provided with a plurality of air inlets 13, and the side wall of the machine body 2 can also be provided with a plurality of air inlets 13. Through the operation of the axial flow fan 1 on the top of the machine body 2, the airflow sequentially flows through the air inlet 13 and the interior of the machine body 2 and finally flows to the axial flow fan 1, so that an airflow direction is formed.
In an embodiment of the present invention, a supercooling-type high-efficiency evaporative condenser includes a body 2, an axial flow fan 1 is disposed at the top of the body 2, and the axial flow fan 1 is communicated with the interior of the body 2. A water spraying pipe group 3 is arranged below an axial flow fan 1 in a machine body 2, a nozzle 6 is arranged at the tail end of the water spraying pipe group 3, a water tank 10 is arranged at the bottom of the machine body, the water tank 10 at the bottom is communicated with the water spraying pipe group 3 at the top through a pipeline, and a circulating water pump 12 is arranged in the pipeline, so that cooling water can be pumped at a certain flow rate to circularly flow. The machine body 2 is divided into a left area and a right area by taking the axial flow fan 1 as a center, and the nozzles 6 at the tail ends of the water spraying pipe groups 3 are independently arranged in the two areas and can independently control spraying of cooling water. The first heat exchanger 41 and the packing II52 are arranged in one region from top to bottom in sequence, the packing I51 and the second heat exchanger 42 are arranged in the other region from top to bottom in sequence, the first heat exchanger 41 is connected with the second heat exchanger 42 in series, and the first heat exchanger 41 is higher than the second heat exchanger 42 in the horizontal direction. One end of the first heat exchanger 41 is communicated with a refrigerant inlet 8 arranged on the side wall of the fan 1, and one end of the second heat exchanger 42 is communicated with a refrigerant outlet 9 arranged on the side wall of the fan 1. A certain space is formed between the two areas below the axial flow fan 1, and 2 water removers 11 are arranged. An air inlet is formed in the machine body 2 above the first heat exchanger 41, air inlets are also formed in the machine body 2 on the side faces of the second heat exchanger 42, the filler I51 and the filler II52, air flows enter the machine body 2 from the air inlets 13 through the operation of the axial flow fan 1 on the top of the machine body 2, pass through the first heat exchanger 41, the second heat exchanger 42, the filler I51 and the filler II52, pass through the dehydrator 11 and finally flow to the axial flow fan 1, and therefore an air flow direction is formed.
The specific operating conditions of the invention are described below: the circulating cooling water in the water tank 10 is uniformly sprayed on the top of the first heat exchanger 41 and the filler I51 through the nozzles 6 at the tail ends of the water spraying pipe groups 3 under the driving of the circulating water pump 12. High-temperature and high-pressure refrigerant discharged by the compressor enters the first heat exchanger 41 from the refrigerant inlet 8 to exchange heat with spray cooling water on the outer side of the heat exchanger and air driven by the axial flow fan 1, the refrigerant becomes a liquid state or a gas-liquid two-phase mixed state under saturated pressure after releasing heat and enters the second heat exchanger 42, part of water on the outer side of the first heat exchanger 41 is evaporated to take away heat, and part of circulating water which is not evaporated falls into the filler II52 to exchange heat with air entering the air inlet 13 and then falls into the water tank 10 after cooling. Circulating water entering the filler I51 exchanges heat with low-temperature air entering the air inlet 13, the water drops to the outer surface of the second heat exchanger 42 after the water temperature is reduced, in the second heat exchanger 42, internal refrigerant exchanges heat with external low-temperature circulating water and air entering the air inlet 13, the internal refrigerant is condensed into liquid with a certain supercooling degree, and circulating water which cannot be evaporated outside the second heat exchanger 42 falls into the water tank 10 and continues to circulate through the driving of the water pump 12. The high-efficiency evaporative condenser with supercooling fully utilizes the two heat exchangers which are independently and distributed in a staggered mode to exchange heat and condense, so that a refrigerant is condensed into refrigerant liquid with a certain supercooling degree, the insufficient liquid supply of an expansion valve can be avoided, the evaporation temperature, the refrigerating capacity and the refrigerating energy efficiency of a unit are improved, and the stable operation of the unit is further ensured.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be taken as limiting the invention. Various changes and modifications may be made to the invention without departing from the spirit and scope of the invention, and such changes and modifications are intended to be within the scope of the invention as claimed.
Claims (10)
1. The utility model provides a high-efficient evaporative condenser of supercooling type carries out the heat transfer through using a quantitative cooling water and refrigerant, the condenser includes the organism, and axial fan is established at the organism top, and axial fan and the inside intercommunication of organism lie in the organism axial fan below and be equipped with the water spray nest of tubes, and the nozzle is established to the water spray nest of tubes end, and the organism bottom is equipped with the water tank, through the pipeline with water tank and water spray nest of tubes intercommunication, establish circulating water pump in the pipeline in order to drive the circulation of cooling water, its characterized in that: the machine body inner cavity is transversely divided into a left area and a right area, nozzles at the tail ends of the water spraying pipe groups are independently arranged in the areas, heat exchangers and fillers are respectively arranged in the areas, the heat exchangers and the fillers are arranged up and down, the heat exchangers and the fillers can be interchanged in sequence according to requirements, the heat exchangers are connected in series, one end of each series heat exchanger is communicated with a refrigerant inlet arranged on the side wall of the fan, the other end of each series heat exchanger is communicated with a refrigerant outlet arranged on the side wall of the fan, the heat exchangers have height difference and are not overlapped in projection in the vertical direction, the machine body is provided with a plurality of air inlets, and air flows to the axial flow fan finally through the air inlets and the interior of the machine body in sequence to form an air flow direction.
2. A subcooling-type high-efficiency evaporative condenser, as recited in claim 1, wherein: a plurality of water removers are arranged in the machine body.
3. A subcooling-type high-efficiency evaporative condenser, as recited in claim 1, wherein: the machine body is transversely divided into a left area and a right area, wherein a first heat exchanger and a filler II are sequentially arranged in one area from top to bottom, a filler I and a second heat exchanger are sequentially arranged in the other area from top to bottom, the two heat exchangers are connected in series, the other end of the first heat exchanger is communicated with a refrigerant inlet arranged on the side wall of the fan, and the other end of the second heat exchanger is communicated with a refrigerant outlet arranged on the side wall of the fan.
4. A subcooling-type high-efficiency evaporative condenser, as recited in claim 3, wherein: the first heat exchanger and the second heat exchanger are preferably arranged on different sides with the fan as a vertical axis.
5. A subcooling-type high-efficiency evaporative condenser, as recited in claim 3, wherein: the dehydrator is arranged below the axial flow fan and between the two areas.
6. A subcooling-type high-efficiency evaporative condenser, as recited in claim 3, wherein: the axial flow fan at the top of the machine body is provided with a plurality of air inlets at the periphery, and the side wall of the machine body is provided with a plurality of air inlets.
7. A subcooling-type high-efficiency evaporative condenser, as recited in claim 6, wherein: the machine body above the first heat exchanger is provided with an air inlet, the machine body on the side surfaces of the second heat exchanger, the filler I and the filler II is also provided with an air inlet, and airflow enters the machine body from the air inlets through the operation of the axial flow fan, passes through the first heat exchanger, the second heat exchanger, the filler I and the filler II and finally flows to the axial flow fan, so that airflow direction is formed.
8. A subcooling-type high-efficiency evaporative condenser, as recited in claim 1, wherein: the heat exchanger can be in a coil pipe type, a plate pipe type or a plate sheet type structure, and can also be in a combination of the structures.
9. A subcooling-type evaporative condenser, as described in claim 1, wherein the heat exchanger is made of stainless steel, carbon steel, copper, aluminum or other alloys.
10. A subcooling-type high-efficiency evaporative condenser, as described in claim 1, wherein the water spray tube groups in each zone can share the circulating water pump, or can be independently installed, or can share the water tank, or can use independent water tanks.
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| CN202110798220.3A CN113587498B (en) | 2021-07-15 | 2021-07-15 | Supercooling type efficient evaporative condenser |
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| CN202110798220.3A CN113587498B (en) | 2021-07-15 | 2021-07-15 | Supercooling type efficient evaporative condenser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113812838A (en) * | 2021-11-05 | 2021-12-21 | 广东美芝制冷设备有限公司 | Cooking utensil |
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| US20130276476A1 (en) * | 2012-04-21 | 2013-10-24 | Lee Wa Wong | Air conditioning system with multiple-effect evaporative condenser |
| US20140338391A1 (en) * | 2013-03-15 | 2014-11-20 | Inertech Ip Llc | Multi-stage evaporative heat rejection process cycle that facilitates process cooling efficiency, water production, and/or water reclamation for fluid coolers and cooling towers |
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| CN113587498B (en) | 2023-04-18 |
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