CN211084308U - Precooling type evaporative condensation air-conditioning system - Google Patents

Precooling type evaporative condensation air-conditioning system Download PDF

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Publication number
CN211084308U
CN211084308U CN201921531806.8U CN201921531806U CN211084308U CN 211084308 U CN211084308 U CN 211084308U CN 201921531806 U CN201921531806 U CN 201921531806U CN 211084308 U CN211084308 U CN 211084308U
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Prior art keywords
precooler
water
communicated
pipeline
evaporative condenser
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Withdrawn - After Issue
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CN201921531806.8U
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Inventor
于海峰
杨瑞琦
郭忠玉
卢耀汕
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The utility model discloses a precooling type evaporation formula condensation air conditioning system, including precooler and evaporation condenser, the precooler with evaporation condenser passes through the pipeline intercommunication, the precooler with still be provided with the temperature sensing treater on evaporation condenser's the pipeline intercommunication, the precooler with there is circulating water pump through the pipeline intercommunication between the evaporation condenser, the precooler with pass through between the evaporation condenser circulating water pump forms this precooling type evaporation formula condensation air conditioning system of circulation circuit, not only reduces evaporation condenser liquid film temperature, improves heat transfer capacity, can also pass through water circulation simultaneously, improves the utilization ratio of water, and is energy-concerving and environment-protective.

Description

Precooling type evaporative condensation air-conditioning system
Technical Field
The utility model relates to an air conditioner technical field especially relates to a precooling type evaporation formula condensation air conditioning system.
Background
In a refrigeration system, a condenser is used for converting high-temperature and high-pressure gaseous refrigerant in the system into normal-temperature and high-pressure liquid refrigerant, at present, the common condenser mainly comprises an air-cooled condenser, a water-cooled condenser and an evaporative condenser, wherein the evaporative condenser utilizes the latent heat of vaporization of water and takes away the heat of the gaseous refrigerant under the action of a fan (the latent heat of vaporization of 50 ℃ water at normal pressure is about 2382.5 kJ/kg), and the air-cooled and water-cooled modes are heat dissipation by utilizing sensible heat, so that the heat exchange efficiency of the evaporative condenser is higher than that of the air-cooled and water-cooled modes. However, the spray water contains calcium, magnesium ions and bicarbonate, the spray water is easy to scale when being sprayed to the surfaces of the heat exchange coil and the fins, the exhaust temperature of the compressor is usually 45-90 ℃, when the temperature of the condensation exhaust pipe is above 60 ℃, the scaling speed of the heat exchange surface is high, the duration time is more than two hours, the impurities such as calcium carbonate and the like in the water begin to combine and precipitate from a free state to a crystalline state, namely scale is formed, and the heat exchange effect of the condenser is reduced.
Patent No. CN201964816U discloses a dysmorphism mouth of pipe microchannel heat transfer flat tube and heat exchanger, propose between evaporative condenser and air-cooler, set up the precooler, carry out the precooling to the overheated refrigerant gas that gets into evaporative condenser, improve heat exchange efficiency, reduce the scale deposit volume, patent No. CN204923933U has proposed an evaporative condenser, the refrigerant passes through the precooling of finless heat exchange tube earlier before getting into the finned tube, the refrigerant that gets into in the finned tube avoids easy scale deposit point, but these two schemes can't accurate control and gets into the evaporation condenser coil pipe temperature below 60 ℃, and the shower water from the top down rises gradually, the vaporization latent heat of water reduces gradually along with the temperature rise, therefore evaporative condensation heat exchanger bottom heat transfer ability is relatively lower, need design scheme control bottom heat exchanger surface liquid film temperature, improve heat transfer ability.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to avoid the weak point among the prior art and provide a precooling type evaporation formula condensation air conditioning system, this precooling type evaporation formula condensation air conditioning system not only reduces evaporation formula condenser liquid film temperature, improves heat transfer capacity, can also pass through the hydrologic cycle simultaneously, improves the utilization ratio of water, and is energy-concerving and environment-protective.
The purpose of the utility model is realized through the following technical scheme:
the precooling type evaporative condensation air-conditioning system comprises a precooler and an evaporative condenser, wherein the precooler is communicated with the evaporative condenser through a pipeline, a temperature sensing processor is also arranged on the pipeline communication between the precooler and the evaporative condenser, a circulating water pump is communicated between the precooler and the evaporative condenser through a pipeline, and a circulating loop is formed between the precooler and the evaporative condenser through the circulating water pump.
Furthermore, the evaporative condenser comprises a heat exchanger, a water spraying component and a water storage tank, wherein the heat exchanger is positioned at the lower end of the water spraying component, and the water storage tank is positioned at the lower end of the heat exchanger.
Furthermore, the heat exchangers and the water spray assemblies are arranged in a plurality of modes, the heat exchangers are arranged in a sectional mode, the heat exchangers are communicated with the precooler through pipelines, two adjacent heat exchangers are communicated with each other through pipelines, and the water spray assemblies are communicated with the precooler through pipelines.
Furthermore, a water receiving tray is arranged between the two adjacent heat exchangers and the water spraying assembly.
Furthermore, the water inlet end of the circulating water pump is communicated with the water storage tank, the water outlet end of the circulating water pump is communicated with the precooler and the water spraying assembly through pipelines respectively, a first valve is fixed on a communication pipeline between the circulating water pump and the precooler, a second valve is fixed on a communication pipeline between the circulating water pump and the water spraying assembly, and the first valve and the second valve are electrically connected with the temperature sensing processor respectively.
Furthermore, the water inlet end of the circulating water pump is communicated with the water storage tank, the water outlet end of the circulating water pump is communicated with the precooler through a pipeline, and the water pump is electrically connected with the temperature sensing processor.
Further, a phase change material fixedly connected with the precooler is arranged in the precooler.
Furthermore, an overflow port communicated with the water storage tank is arranged on one side of the water storage tank.
The evaporator is communicated with the evaporative condenser, and the evaporator is communicated with the evaporative condenser through a pipeline.
Furthermore, a throttle valve used for controlling the flow of fluid flowing through the evaporator is arranged between the evaporator and the evaporative condenser.
Has the advantages that: due to the arrangement of the precooler, the evaporative condenser, the temperature sensing processor and the circulating water pump, the precooling evaporative condensation air-conditioning system can effectively improve the use performance of the precooler by matching the temperature sensing processor with the precooler in the use process, greatly reduce the liquid film temperature of the evaporative condenser, improve the heat exchange capacity, improve the water utilization rate by water circulation, save energy and protect environment.
Drawings
The invention is further described with the aid of the accompanying drawings, in which, however, the embodiments do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived from the following drawings without inventive effort.
Fig. 1 is a schematic view of an overall structure of a first embodiment of the present invention.
Fig. 2 is a schematic view of the overall structure of the second embodiment of the present invention.
The figure includes: the system comprises a compressor 1, an evaporator 2, a precooler 3, an evaporative condenser 4, a heat exchanger 41, a first heat exchanger 411, a second heat exchanger 412, a third heat exchanger 413, a water spraying assembly 42, a first water spraying assembly 421, a second water spraying assembly 422, a third water spraying assembly 423, a water storage tank 43, a circulating water pump 5, a temperature sensing processor 6, a first valve 7, a second valve 8, a phase change material 9, an overflow port 10, a throttle valve 11 and a water replenishing port 12.
Detailed Description
The invention will be further described with reference to the following examples.
Example one
As shown in fig. 1, the embodiment provides a precooling type evaporative condensation air-conditioning system, which includes a compressor 1, an evaporator 2, a precooler 3 and an evaporative condenser 4, wherein one end of the compressor 1 is communicated with the precooler 3 through a pipeline, the other end is communicated with the evaporator 2 through a pipeline, the evaporator 2 is communicated with the evaporative condenser 4 through a pipeline, the precooler 3 is communicated with the evaporative condenser 4 through a pipeline, a temperature sensing processor 6 for monitoring the refrigerant inlet temperature of the evaporative condenser 4 is further arranged on the pipeline communication between the precooler 3 and the evaporative condenser 4, a circulating water pump 5 is communicated between the precooler 3 and the evaporative condenser 4 through a pipeline, a circulating loop is formed between the precooler 3 and the evaporative condenser 4 through the circulating water pump 5, the evaporative condenser 4 includes a heat exchanger 41, a water spray assembly 42 and a water storage tank 43, the heat exchanger 41 is located at the lower end of, the water storage tank 43 is positioned at the lower end of the heat exchanger 41, so that the liquid film temperature of the evaporative condenser 4 is reduced, the heat exchange capacity is improved, meanwhile, the water utilization rate is improved through water circulation, and the water storage tank is energy-saving and environment-friendly.
As shown in fig. 1, in the preferred embodiment, three heat exchangers 41 are provided, including a first heat exchanger 411, a second heat exchanger 412 and a third heat exchanger 413, and the three heat exchangers 41 are arranged in the evaporative condenser 4 in a sectional manner; the number of the water spraying assemblies 42 is three, and the three water spraying assemblies comprise a first water spraying assembly 421, a second water spraying assembly 422 and a third water spraying assembly 423; the three water spray assemblies 42 are correspondingly arranged at the upper ends of the three heat exchangers 41, and two adjacent heat exchangers 41 are mutually communicated through a pipeline; the first heat exchanger 411 is communicated with the precooler 3 through a pipeline, the first heat exchanger 411 is communicated with the second heat exchanger 412 through a pipeline, the second heat exchanger 412 is communicated with the third heat exchanger 413 through a pipeline, the first water spraying component 421 is communicated with the precooler 3 through a pipeline, the second water spraying component 422 is communicated with the water outlet end of the circulating water pump 5 through a pipeline, and the third water spraying component 423 is communicated with the water replenishing port 12 through a pipeline, because the heat exchanger 41 in the evaporative condenser 4 adopts a sectional type, circulating water with different water temperatures is utilized in a step mode, and the spraying water of each water spraying component 42 is not influenced mutually, all the spraying water is finally collected in the water storage tank 43 and circulates and reciprocates, meanwhile, the first heat exchanger 411 mainly cools the refrigerant gas entering the evaporative condenser 4, after cooling, the refrigerant gas enters the second heat exchanger 412 to mainly condense and then enters the third heat exchanger 413 to be supercooled, the water inlet temperature of the water replenishing port 12 is generally lower than the ambient temperature, so that the third spraying assembly 423 is beneficial to the generation of the supercooling degree of the refrigerant at the outlet of the evaporative condenser 4 on the third heat exchanger 413, the liquid film temperature of the evaporative condenser 4 is effectively reduced, and the heat exchange capacity is improved.
The water inlet end of the circulating water pump 5 is communicated with the water storage tank 43, the water outlet end of the circulating water pump 5 is respectively communicated with the precooler 3 and the water spraying component 42 through pipelines and is used for transferring water in the water storage tank 43 into the precooler 3 and the water spraying component 42 through the circulating water pump 5 to carry out water circulation, a first valve 7 is fixed on a communication pipeline between the circulating water pump 5 and the precooler 3, and further, the first valve 7 is fixed on a communication pipeline between the second water spraying component 422 and the circulating water pump 5 and is used for controlling water flow in the second water spraying component 422; a second valve 8 is fixed on a communication pipeline between the circulating water pump 5 and the water spray assembly 42, further, the second valve 8 is fixed on the communication pipeline between the precooler 3 and the circulating water pump 5 and is used for controlling the water flow in the precooler 3, the first valve 7 and the second valve 8 are respectively electrically connected with the temperature sensing processor 6, and the opening and closing sizes of the first valve 7 and the second valve 8 can be controlled through the temperature sensing processor 6; because the circulating water of the evaporative condenser 4 is divided into two paths after flowing through the circulating water pump 5, one path of the circulating water exchanges heat with the precooler 3, the inlet temperature of the evaporative condenser 4 is reduced to below 60 ℃ of a scaling point, the surface scaling of the heat exchanger 41 is prevented, and the other path of the circulating water directly sprays the heat exchanger 41.
As shown in fig. 1, in the preferred embodiment, a water receiving tray 44 is disposed between two adjacent heat exchangers 41 and the water spray assembly 42, and further, the water receiving tray 44 is disposed in an inclined manner, so that the spray water in each section between the three heat exchangers 4 is not affected, and finally, all the spray water is collected in the water storage tank 43 and circulates back and forth.
As shown in fig. 1, in a preferred embodiment, a phase-change material 9 fixedly connected to the precooler 3 is disposed inside the precooler 3, and further, the phase-change material 9 is paraffin, which can effectively improve the precooling effect.
As shown in fig. 1, in the preferred embodiment, an overflow opening 10 communicated with the water storage tank 43 is provided at one side of the water storage tank 43, so as to prevent the water in the water storage tank 43 from being stored too much and affecting the normal use of the evaporative condenser 4.
As shown in fig. 1, in the preferred embodiment, a throttle valve 11 for controlling the flow rate of the fluid flowing through the evaporator 2 is further disposed between the evaporator 2 and the evaporative condenser 4, so as to effectively control the flow rate between the evaporator 2 and the evaporative condenser 4, and the practicability is high.
The use steps of the precooling type evaporative condensation air-conditioning system in the embodiment are as follows:
(1) opening the precooling type evaporative condensation air-conditioning system, and keeping the opening degree of the first valve 7 and the opening degree of the second valve 8 consistent;
(2) the temperature sensing processor 6 is used for measuring that the temperature of the inlet of the evaporative condenser 4 is T1, the opening degree of the valve 1 is consistent with that of the valve 2, when the temperature T1-60 ℃ is more than or equal to T, the first valve 7 is opened greatly, the second valve 8 is reduced, the water flow on the branch of the first valve 7 is increased, heat is taken away from the precooler 3, and the temperature of the air inlet pipe of the evaporative condenser 4 is reduced; when the temperature T1-60 ℃ is less than T, the opening degree of the first valve 7 and the second valve 8 is kept unchanged; the temperature sensing processor 6 measures the inlet temperature t of the evaporative condenser 4 in the following range: t is more than or equal to minus 5 ℃ and less than or equal to minus 2 ℃, wherein t is less than minus 5 ℃, the required water amount is large, t is more than minus 2 ℃, and the existence of thermal inertia easily causes the inlet temperature of the evaporative condenser 4 to be higher than the scaling point by 60 ℃;
(3) and (3) closing the precooling type evaporative condensation air-conditioning system, and resetting the first valve 7 and the second valve 8 to keep the opening degrees consistent.
Example two
As shown in fig. 2, the embodiment provides a precooling type evaporative condensation air-conditioning system, which includes a compressor 1, an evaporator 2, a precooler 3 and an evaporative condenser 4, wherein one end of the compressor 1 is communicated with the precooler 3 through a pipeline, the other end is communicated with the evaporator 2 through a pipeline, the evaporator 2 is communicated with the evaporative condenser 4 through a pipeline, the precooler 3 is communicated with the evaporative condenser 4 through a pipeline, a temperature sensing processor 6 for monitoring the refrigerant inlet temperature of the evaporative condenser 4 is further disposed on the pipeline communication between the precooler 3 and the evaporative condenser 4, a circulating water pump 5 is communicated between the precooler 3 and the evaporative condenser 4 through a pipeline, a circulating loop is formed between the precooler 3 and the evaporative condenser 4 through the circulating water pump 5, the evaporative condenser 4 includes a heat exchanger 41, a water spray assembly 42 and a water storage tank 43, the heat exchanger 41 is located at the lower end of, the water storage tank 43 is positioned at the lower end of the heat exchanger 41, so that the liquid film temperature of the evaporative condenser 4 is reduced, the heat exchange capacity is improved, meanwhile, the water utilization rate is improved through water circulation, and the water storage tank is energy-saving and environment-friendly.
As shown in fig. 2, in the preferred embodiment, two heat exchangers 41 are provided, including a first heat exchanger 411 and a second heat exchanger 412, and the two heat exchangers 41 are provided in two stages in the evaporative condenser 4; two water spray assemblies 42 are provided, including a first water spray assembly 42 and a second water spray assembly 422; the two water spray assemblies 42 are correspondingly arranged at the upper ends of the two heat exchangers 41, and the two adjacent heat exchangers 41 are communicated with each other through a pipeline; the first heat exchanger 411 is communicated with the precooler 3 through a pipeline, the first heat exchanger 411 is communicated with the second heat exchanger 412 through a pipeline, the first water spraying assembly 421 is communicated with the precooler 3 through a pipeline, and the second water spraying assembly 423 is communicated with the water replenishing port 12 through a pipeline.
The water inlet end of the circulating water pump 5 is communicated with the water storage tank 43, the water outlet end of the circulating water pump 5 is communicated with the precooler 3 through a pipeline and used for transferring water in the water storage tank 43 into the precooler 3 through the circulating water pump 5, the circulating water pump 5 is electrically connected with the temperature sensing processor 6, the temperature sensing processor 6 can control the rotating speed of the circulating water pump 5, the water inlet amount of the precooler 3 is controlled, the liquid film temperature of the evaporative condenser 4 is effectively reduced, the heat exchange capacity is improved, meanwhile, the temperature of the refrigerant at the inlet of the evaporative condenser 4 can be accurately controlled to be below 60 ℃ of a scaling point through the temperature sensing processor 6, and scaling on the.
As shown in fig. 2, in the preferred embodiment, a water receiving tray 44 is disposed between two adjacent heat exchangers 41 and the water spray assembly 42, and further, the water receiving tray 44 is disposed in an inclined manner, so that the spray water in each section between the three heat exchangers 4 is not affected, and finally, all the spray water is collected in the water storage tank 43 and circulates back and forth.
As shown in fig. 2, in a preferred embodiment, a phase-change material 9 fixedly connected to the precooler 3 is disposed inside the precooler 3, and further, the phase-change material 9 is paraffin, which can effectively improve the precooling effect.
As shown in fig. 2, in the preferred embodiment, an overflow opening 10 communicated with the water storage tank 43 is provided at one side of the water storage tank 43, so as to prevent the water in the water storage tank 43 from being stored too much and affecting the normal use of the evaporative condenser 4.
As shown in fig. 2, in the preferred embodiment, a throttle valve 11 for controlling the flow rate of the fluid flowing through the evaporator 2 is further disposed between the evaporator 2 and the evaporative condenser 4, so as to effectively control the flow rate between the evaporator 2 and the evaporative condenser 4, and the practicability is high.
The use steps of the precooling type evaporative condensation air-conditioning system in the embodiment are as follows:
(1) starting the precooling type evaporative condensation air-conditioning system, and keeping the rotating speed of the circulating water pump 5 stable;
(2) the temperature sensing processor 6 is used for measuring the temperature T1 of the inlet of the evaporative condenser 4, when the temperature T1-60 ℃ is more than or equal to T, the rotating speed of the circulating water pump 4 is increased, the water flow is increased, the heat in the precooler 3 is taken away, and the temperature of the air inlet pipeline of the evaporative condenser 4 is reduced; when the temperature T1-60 ℃ is less than T, the rotating speed of the circulating water pump 4 is unchanged, and the water flow in the precooler 3 is unchanged; the temperature sensing processor 6 measures the inlet temperature t of the evaporative condenser 4 in the following range: t is more than or equal to minus 5 ℃ and less than or equal to minus 2 ℃, wherein t is less than minus 5 ℃, the required water amount is large, t is more than minus 2 ℃, and the existence of thermal inertia easily causes the inlet temperature of the evaporative condenser 4 to be higher than the scaling point by 60 ℃;
(3) and (4) turning off the precooling type evaporative condensation air-conditioning system, and stopping the circulating water pump 4.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A precooling type evaporative condensation air-conditioning system is characterized in that: the temperature sensing device comprises a precooler and an evaporative condenser, wherein the precooler is communicated with the evaporative condenser through a pipeline, a temperature sensing processor is further arranged on the pipeline communication between the precooler and the evaporative condenser, a circulating water pump is communicated between the precooler and the evaporative condenser through a pipeline, and a circulating loop is formed between the precooler and the evaporative condenser through the circulating water pump.
2. The system of claim 1, wherein: the evaporative condenser comprises a heat exchanger, a water spraying assembly and a water storage tank, wherein the heat exchanger is positioned at the lower end of the water spraying assembly, and the water storage tank is positioned at the lower end of the heat exchanger.
3. The system of claim 2, wherein: the heat exchanger and the water spray assembly are arranged, the heat exchanger is arranged in a sectional mode, the heat exchanger is communicated with the precooler through a pipeline, two adjacent heat exchangers are communicated with each other through a pipeline, and the water spray assembly is communicated with the precooler through a pipeline.
4. The system of claim 3, wherein: and a water receiving tray is arranged between the two adjacent heat exchangers and the water spraying assembly.
5. The system of claim 2, wherein: the water inlet end of the circulating water pump is communicated with the water storage tank, the water outlet end of the circulating water pump is communicated with the precooler and the water spraying assembly through pipelines respectively, a first valve is fixed on a communication pipeline between the circulating water pump and the precooler, a second valve is fixed on a communication pipeline between the circulating water pump and the water spraying assembly, and the first valve and the second valve are electrically connected with the temperature sensing processor respectively.
6. The system of claim 2, wherein: the water inlet end of the circulating water pump is communicated with the water storage tank, the water outlet end of the circulating water pump is communicated with the precooler through a pipeline, and the circulating water pump is electrically connected with the temperature sensing processor.
7. The system of claim 1, wherein: and the phase-change material fixedly connected with the precooler is arranged in the precooler.
8. The system of claim 2, wherein: and an overflow port communicated with the water storage tank is arranged on one side of the water storage tank.
9. The system of claim 1, wherein: the evaporator is characterized by also comprising a compressor and an evaporator, wherein one end of the compressor is communicated with the precooler through a pipeline, the other end of the compressor is communicated with the evaporator through a pipeline, and the evaporator is communicated with the evaporative condenser through a pipeline.
10. The system of claim 9, wherein: and a throttle valve used for controlling the flow of fluid flowing through the evaporator is also arranged between the evaporator and the evaporative condenser.
CN201921531806.8U 2019-09-16 2019-09-16 Precooling type evaporative condensation air-conditioning system Withdrawn - After Issue CN211084308U (en)

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Application Number Priority Date Filing Date Title
CN201921531806.8U CN211084308U (en) 2019-09-16 2019-09-16 Precooling type evaporative condensation air-conditioning system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110608492A (en) * 2019-09-16 2019-12-24 珠海格力电器股份有限公司 Precooling type evaporative condensation air-conditioning system and control method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110608492A (en) * 2019-09-16 2019-12-24 珠海格力电器股份有限公司 Precooling type evaporative condensation air-conditioning system and control method thereof
CN110608492B (en) * 2019-09-16 2023-12-15 珠海格力电器股份有限公司 Precooling evaporative condensing air conditioning system and control method thereof

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