CN110671842B - Air conditioning system capable of enhancing evaporation heat exchange effect - Google Patents
Air conditioning system capable of enhancing evaporation heat exchange effect Download PDFInfo
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- CN110671842B CN110671842B CN201910951318.0A CN201910951318A CN110671842B CN 110671842 B CN110671842 B CN 110671842B CN 201910951318 A CN201910951318 A CN 201910951318A CN 110671842 B CN110671842 B CN 110671842B
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- Prior art keywords
- heat exchanger
- air conditioning
- conditioning system
- pulsation generator
- outdoor heat
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 46
- 230000000694 effects Effects 0.000 title claims abstract description 18
- 238000001704 evaporation Methods 0.000 title claims abstract description 16
- 230000008020 evaporation Effects 0.000 title claims abstract description 16
- 230000002708 enhancing effect Effects 0.000 title abstract description 8
- 230000010349 pulsation Effects 0.000 claims abstract description 53
- 239000003507 refrigerant Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 10
- 238000009834 vaporization Methods 0.000 claims description 8
- 230000008016 vaporization Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
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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
- F25B41/00—Fluid-circulation arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses an air conditioning system capable of enhancing evaporation heat exchange effect. The air conditioning system comprises an indoor heat exchanger and an outdoor heat exchanger, wherein a pulsation generator is arranged on a pipeline between the indoor heat exchanger and the outdoor heat exchanger, and the pulsation generator generates pulsation on a refrigerant to be flowed into the indoor heat exchanger or the outdoor heat exchanger to strengthen the evaporation heat exchange effect of the indoor heat exchanger or the outdoor heat exchanger. The invention makes the refrigerant flow in the evaporator in a pulsating way through the pulsation generator, thereby enhancing the heat exchange performance and improving the energy efficiency of the air conditioning system.
Description
Technical Field
The present invention relates to air conditioning systems, and more particularly, to an air conditioning system with enhanced evaporative heat transfer.
Background
In an air conditioning system, an evaporator is used as one of core components, the heat exchange performance of the evaporator has direct influence on the operation of the whole system, and the better heat exchange performance has important significance in reducing refrigerant filling, improving the energy efficiency of the system and developing the miniaturization and light weight of the system.
In the prior art, in order to improve the heat exchange effect of the evaporator, a mode of matching a metal round tube with fins is mostly adopted to improve the heat exchange performance of the evaporator, but the effect is limited.
Therefore, how to provide an air conditioning system with better evaporation heat exchange effect is a technical problem to be solved in the industry.
Disclosure of Invention
In order to solve the technical problem of how to further improve the evaporation heat exchange performance of the air conditioning system in the prior art, an air conditioning system capable of enhancing the evaporation heat exchange effect is provided.
The air conditioning system comprises an indoor heat exchanger and an outdoor heat exchanger, wherein a pulsation generator is arranged on a pipeline between the indoor heat exchanger and the outdoor heat exchanger, and the pulsation generator generates pulsation on a refrigerant to be flowed into the indoor heat exchanger or the outdoor heat exchanger so as to strengthen the evaporation heat exchange effect of the indoor heat exchanger or the outdoor heat exchanger.
Preferably, the air conditioning system further comprises a temperature sensor and a pressure sensor which are arranged on the upstream side of the pulsation generator according to the flow direction of the refrigerant, and the controller of the air conditioning system controls the amplitude and the vibration frequency of the pulsation generator according to the detection results of the temperature sensor and the pressure sensor on the upstream side of the pulsation generator.
Specifically, the controller receives detection results of the pressure sensor and the temperature sensor, calculates the gas-liquid state and the proportion of the refrigerant, and adjusts the vibration frequency and the vibration amplitude of the pulsation generator according to the proportion and combining the distance from the pulsation generator to the indoor heat exchanger or the outdoor heat exchanger and the length of a heat exchange tube of the indoor heat exchanger or the outdoor heat exchanger.
Specifically, the controller finds the enthalpy value h1 corresponding to the detection result in the pressure enthalpy diagram, and finds the enthalpy value h in the corresponding saturation state and the vaporization latent heat r corresponding to the evaporation temperature according to the evaporation temperature, and passes through the formulaThe proportion of the gaseous refrigerant in the unit mass of refrigerant vapor is calculated.
Specifically, the vibration frequency of the pulsation generator ranges from 0.5 to 2Hz.
In one embodiment, when the air conditioning system is a heat pump air conditioning system, a group of temperature sensors and pressure sensors are respectively arranged on the pipelines at two sides of the pulsation generator. And a throttling device is respectively arranged on the pipelines at the two sides of the pulsation generator, the throttling device opens a throttling effect when the throttling device is positioned at the upstream side of the pulsation generator according to the flow direction of the refrigerant, and each group of temperature sensors and pressure sensors are positioned between the pulsation generator and the throttling device.
Specifically, a pipeline of the indoor heat exchanger connected with an outlet of the four-way valve of the air conditioning system is provided with an electromagnetic valve, two ends of the electromagnetic valve are connected in parallel with a branch, and a liquid storage tank and an electromagnetic valve are connected in series on the branch.
Specifically, a pipeline of the outdoor heat exchanger connected with an outlet of the four-way valve of the air conditioning system is provided with an electromagnetic valve, two ends of the electromagnetic valve are connected in parallel with a branch, and a liquid storage tank and an electromagnetic valve are connected in series on the branch.
On the basis of the above, the heat exchange tube in the indoor heat exchanger and/or the outdoor heat exchanger can be a corrugated tube, and the indoor heat exchanger and/or the outdoor heat exchanger can be a fin type heat exchanger.
The invention achieves the purpose of enhancing heat exchange by changing the form of the heat pipe and the flowing form of the refrigerant on the basis of the evaporator of the prior air conditioning system. The evaporator has a simple structure, and can effectively improve the heat exchange performance of the evaporator, so that the overall energy efficiency of the system is improved; meanwhile, the whole system can be developed in the direction of miniaturization and light weight on the premise of achieving the same refrigerating/heating quantity.
Drawings
The invention is described in detail below with reference to examples and figures, wherein:
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Detailed Description
The principles and embodiments of the present invention are described in detail below with reference to the drawings.
Fig. 1 shows an embodiment of an air conditioning system according to the present invention, in which the air conditioning system is a heat pump air conditioning system, and includes a compressor 1, a four-way valve 2, an indoor heat exchanger 3, an outdoor heat exchanger 4, a throttle device, a gas-liquid separator 11, and the like. The compressor 1 is connected with the indoor heat exchanger 3 and the outdoor heat exchanger 4 through the four-way valve 2, a solenoid valve 5 is arranged on a pipeline of the indoor heat exchanger 3 connected with one outlet of the four-way valve 2, two ends of the solenoid valve are connected with a branch in parallel, and a liquid storage tank 6 and the solenoid valve 5 are connected in series on the branch. An electromagnetic valve 5 is arranged on a pipeline of the outdoor heat exchanger 4 connected with one outlet of the four-way valve 2 of the air conditioning system, two ends of the electromagnetic valve 5 are connected in parallel with a branch, and a liquid storage tank 6 and the electromagnetic valve 5 are connected in series on the branch. Two throttling devices are arranged between the indoor heat exchanger and the outdoor heat exchanger, the throttling devices can be specifically electronic expansion valves, the throttling effect is opened when the electronic expansion valve 7 is positioned on the upstream side of the pulsation generator 8 according to the flow direction of the refrigerant, and the electronic expansion valve 7 positioned on the downstream side of the pulsation generator 8 is closed, so that the throttling effect is only used as a switching valve capable of allowing the refrigerant to pass through. When the air conditioning system is used for refrigerating, the high-temperature and high-pressure refrigerant is condensed into a high-temperature and low-pressure liquid refrigerant through the condenser (the outdoor heat exchanger), and the liquid refrigerant is expanded through the electronic expansion valve 7 to form a low-temperature and low-pressure liquid refrigerant and then flows into the evaporator (the indoor heat exchanger).
A pulsation generator 8 is arranged on a pipeline between the indoor heat exchanger 3 and the outdoor heat exchanger 4, and the pulsation generator 8 generates pulsation on the refrigerant flowing into the indoor heat exchanger or the outdoor heat exchanger so as to strengthen the evaporation heat exchange effect of the indoor heat exchanger or the outdoor heat exchanger. That is, the pulsation generator 8 pulsates the refrigerant flowing into the evaporator in the air conditioning system, thereby enhancing the evaporation heat exchange effect of the evaporator of the air conditioning system. When the air conditioning system is a single cooling system, the pulsation generator 8 is installed upstream of the evaporator (outdoor heat exchanger) side.
According to experimental data, when the vibration frequency range of the pulsation generator 8 is 0.5-2Hz, the evaporation heat exchange effect of the evaporator can be effectively enhanced. In a preferred embodiment, a temperature sensor 9 and a pressure sensor 10 provided on the upstream side of the pulsation generator 8 in the flow direction of the refrigerant may be provided between the evaporator and the electronic expansion valve 7, and then the controller of the air conditioning system controls the amplitude and the vibration frequency of the pulsation generator 8 according to the detection results of the temperature sensor 9 and the pressure sensor 10. In the heat pump air conditioning system of the present embodiment, a set of temperature sensors and pressure sensors are respectively disposed on the pipelines on both sides of the pulsation generator 8, and specifically, two sets of temperature sensors 9 and pressure sensors 10 of the present embodiment are respectively disposed between the pulsation generator 8 and one electronic expansion valve 7. According to the flow direction of the refrigerant, the controller controls only one set of temperature sensor and pressure sensor on the upstream side of the pulsation generator 8 to detect, and controls the amplitude and vibration frequency of the pulsation generator 8 according to the detection results thereof.
The controller receives the detection results of the pressure sensor 10 and the temperature sensor 9 at the upstream side of the pulsation generator 8, calculates the gas-liquid state and the proportion of the refrigerant, and adjusts the vibration frequency and the amplitude of the pulsation generator 8 according to the proportion and the distance from the pulsation generator 8 to the indoor heat exchanger or the outdoor heat exchanger and the length of the heat exchange tube of the indoor heat exchanger or the outdoor heat exchanger. In this embodiment, the controller is adjusted according to the ratio in combination with the length of the heat exchange tube of the indoor heat exchanger or the outdoor heat exchanger currently functioning as an evaporator, and the distance from the pulsation generator 8 to the indoor heat exchanger or the outdoor heat exchanger functioning as an evaporator. The controller of the air conditioning system finds the enthalpy value h1 corresponding to the detection result corresponding to the pressure sensor and the temperature sensor in the pressure enthalpy diagram, and searches the enthalpy value h corresponding to the saturated state and the vaporization latent heat r corresponding to the vaporization temperature according to the vaporization temperature, and the enthalpy value h and the vaporization latent heat r are calculated according to the formulaThe proportion of the gaseous refrigerant in the unit mass of refrigerant vapor is calculated. The different proportions, the distances between the corresponding pulsation generators 8 and the evaporators and the lengths of the heat exchange tubes of the evaporators are verified and calculated through experiments in advance, the optimal vibration amplitude and vibration frequency of the pulsation generators 8 are obtained, the optimal vibration amplitude and vibration frequency are stored in a corresponding database or a memory, and when the proportions are calculated by the controller, the existing result data can be searched by combining the distances and the lengths to quickly obtain the vibration amplitude and the vibration frequency which should be adjusted.
In this embodiment, the heat exchange tube in the indoor heat exchanger and/or the outdoor heat exchanger is a bellows, and the indoor heat exchanger and/or the outdoor heat exchanger is a fin type heat exchanger. When the heat exchanger with the evaporator effect adopts the corrugated pipe as the heat exchange pipe, the low-temperature low-pressure liquid refrigerant with the pulsation flow form exchanges heat through the corrugated pipe evaporator, and at the moment, the evaporation process can be rapidly completed due to the pulsation flow heat exchange enhancing effect and the increased heat exchange area of the corrugated pipe, and the evaporated refrigerant returns to the compressor after being changed into low-temperature low-pressure gas, so that one cycle is completed. Of course, if no corrugated pipe is adopted, the evaporation performance can be greatly improved compared with the prior art by only adopting the pulsation generator.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. An air conditioning system comprises an indoor heat exchanger and an outdoor heat exchanger, and is characterized in that a pulsation generator is arranged on a pipeline between the indoor heat exchanger and the outdoor heat exchanger, and the pulsation generator generates pulsation on a refrigerant to be flowed into the indoor heat exchanger or the outdoor heat exchanger to strengthen the evaporation heat exchange effect of the indoor heat exchanger or the outdoor heat exchanger;
The air conditioning system further comprises a temperature sensor and a pressure sensor which are arranged on the upstream side of the pulsation generator according to the flow direction of the refrigerant, and the controller of the air conditioning system controls the amplitude and the vibration frequency of the pulsation generator according to the detection results of the temperature sensor and the pressure sensor on the upstream side of the pulsation generator.
2. The air conditioning system according to claim 1, wherein the controller receives the detection results of the pressure sensor and the temperature sensor, calculates a gas-liquid state and a ratio of the refrigerant, and adjusts a vibration frequency and an amplitude of the pulsation generator according to the ratio in combination with a distance from the pulsation generator to the indoor heat exchanger or the outdoor heat exchanger and a length of a heat exchange tube of the indoor heat exchanger or the outdoor heat exchanger.
3. The air conditioning system as set forth in claim 2, wherein said controller finds an enthalpy value h1 corresponding to said detection result in a pressure-enthalpy diagram, and finds an enthalpy value h corresponding to a saturation state and a vaporization latent heat r corresponding to said vaporization temperature according to a vaporization temperature, and passes through a formulaThe proportion of the gaseous refrigerant in the unit mass of refrigerant vapor is calculated.
4. The air conditioning system of claim 1, wherein the pulsation generator has a vibration frequency in the range of 0.5-2Hz.
5. The air conditioning system according to claim 1, wherein when the air conditioning system is a heat pump air conditioning system, a set of temperature sensors and pressure sensors are respectively arranged on the pipelines at both sides of the pulsation generator.
6. The air conditioning system according to claim 5, wherein a throttle device is provided on each of the pipelines on both sides of the pulsation generator, and the throttle device opens a throttle effect when it is located on an upstream side of the pulsation generator in accordance with a refrigerant flow direction, and each of the temperature sensor and the pressure sensor is located between the pulsation generator and the throttle device.
7. The air conditioning system according to claim 5, wherein a solenoid valve is provided on a pipeline of the indoor heat exchanger connected to an outlet of the four-way valve of the air conditioning system, two ends of the solenoid valve are connected in parallel with a branch, and a liquid storage tank and a solenoid valve are connected in series on the branch.
8. The air conditioning system according to claim 5, wherein a solenoid valve is provided on a pipe line of the outdoor heat exchanger connected to an outlet of the four-way valve of the air conditioning system, two ends of the solenoid valve are connected in parallel with a branch line, and a liquid storage tank and a solenoid valve are connected in series with the branch line.
9. An air conditioning system according to claim 1, characterized in that the heat exchange tubes in the indoor heat exchanger and/or the outdoor heat exchanger are corrugated.
10. An air conditioning system as set forth in claim 1 wherein said indoor heat exchanger and/or said outdoor heat exchanger employs a fin heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910951318.0A CN110671842B (en) | 2019-10-08 | 2019-10-08 | Air conditioning system capable of enhancing evaporation heat exchange effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910951318.0A CN110671842B (en) | 2019-10-08 | 2019-10-08 | Air conditioning system capable of enhancing evaporation heat exchange effect |
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| Publication Number | Publication Date |
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| CN110671842A CN110671842A (en) | 2020-01-10 |
| CN110671842B true CN110671842B (en) | 2024-08-06 |
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| CN201910951318.0A Active CN110671842B (en) | 2019-10-08 | 2019-10-08 | Air conditioning system capable of enhancing evaporation heat exchange effect |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210625025U (en) * | 2019-10-08 | 2020-05-26 | 珠海格力电器股份有限公司 | Air conditioning system capable of enhancing evaporation heat exchange effect |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100541057C (en) * | 2006-11-09 | 2009-09-16 | 浙江三花制冷集团有限公司 | Parallel flow heat exchanger |
| CN104121720A (en) * | 2013-04-26 | 2014-10-29 | 中国科学院理化技术研究所 | Electric automobile air conditioning system adopting air source heat pump |
| CN107763774A (en) * | 2017-11-09 | 2018-03-06 | 青岛海尔空调器有限总公司 | Air conditioner cooling cycle system and air conditioner |
| CN108954505B (en) * | 2018-05-24 | 2020-09-29 | 广东美的制冷设备有限公司 | Air conditioner |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN210625025U (en) * | 2019-10-08 | 2020-05-26 | 珠海格力电器股份有限公司 | Air conditioning system capable of enhancing evaporation heat exchange effect |
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