Air suspension fluorine pump heat pipe air conditioning system with auxiliary evaporator
By adding a straight-tube microchannel auxiliary evaporator and flow control to the air-suspension compressor air conditioning system, the problem of insufficient heat exchange capacity of refrigerant pump air conditioners in low-temperature seasons has been solved, achieving a high energy efficiency ratio cooling effect throughout the year, reducing air conditioning power consumption and adapting to different temperature environments.
Patent Information
- Application Number
- CN202422961045.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing refrigerant pump air conditioners have insufficient heat exchange capacity in low-temperature seasons, resulting in low energy efficiency. They also have significant limitations in low-temperature environments. The refrigerant pump and compressor share the evaporator, leading to high flow resistance and uneven heat exchange. Furthermore, the compressor's refrigerant oil coating affects heat exchange efficiency.
An auxiliary evaporator with a straight-tube microchannel structure is added to the existing air-suspension compressor air conditioning system. The refrigerant flow is precisely controlled by a flow control valve. The refrigerant pump is connected in series with the auxiliary evaporator, and the compressor is connected in parallel with the auxiliary evaporator. Combined with the parallel setting of solenoid valves, automatic adjustment of multiple cooling modes can be achieved.
It achieves high energy efficiency cooling performance throughout the year, avoids the impact of refrigeration oil, improves heat exchange efficiency, reduces air conditioning power consumption, adapts to different temperature environments, and reduces equipment costs.
Smart Images
Figure CN223639550U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a machine room air conditioning technical field, especially a gas suspension fluorine pump heat pipe air conditioning system with auxiliary evaporator. BACKGROUND
[0002] With the development of global information, the number of data centers and information communication machine rooms is rapidly increasing, and the machine room air conditioners used for maintaining temperature control of the machine rooms are applied more and more, and consume more and more electric energy, which becomes the focus of the whole society. The machine room air conditioner is composed of indoor evaporator, outdoor condenser, and electric power components such as internal fan, external fan, and compressor. The power consumption of the compressor accounts for more than 70% of the whole machine. Reducing the working and power consumption of the compressor is the key factor of air conditioning energy saving.
[0003] In order to reduce the power consumption of the compressor of the machine room air conditioner, there are double-loop heat pipe air conditioning technology and fluorine pump integrated air conditioning technology on the market at present. The double-loop heat pipe air conditioner increases a completely independent heat pipe heat exchange loop on the basis of the existing compressor refrigeration loop. When the outdoor temperature is low, the heat pipe heat exchange loop will start to take away the indoor heat of the machine room, automatically reduce the start of the compressor, and thus reduce the power consumption of the compressor. The advantage of this scheme is that it can make full use of the indoor and outdoor temperature difference for heat exchange, and the energy saving efficiency is high. The disadvantage is that the indoor evaporator, outdoor condenser, and connecting pipeline are all double of the traditional machine room air conditioner, the product cost is high, the occupied space is large, and the use has certain limitations.
[0004] The fluorine pump air conditioner is a liquid pump (referred to as fluorine pump) connected in series on the return liquid pipe of the existing air conditioner. When the outdoor temperature is low, the compressor can be closed and bypassed by the electromagnetic valve to drive the fluorine pump to run. The fluorine pump drives the liquid refrigerant into the evaporator, absorbs heat and vaporizes in the evaporator, and then enters the outdoor condenser to condense into a liquid state due to low temperature, and then returns to the fluorine pump to be driven into the evaporator, so as to circulate and take away the indoor heat. The fluorine pump air conditioner has the advantages of simple structure, low cost, and can reduce the use of the compressor in the low temperature season to reduce power consumption and has a certain energy saving effect. The obvious disadvantage is that the energy saving efficiency is not high. Since the fluorine pump is connected in series in the compression refrigeration circuit, the fluorine pump works with the compressor refrigeration using the same evaporator, and the evaporator adopts a coil type structure which is convenient for the flow of gaseous refrigerant. However, when the fluorine pump works, the liquid refrigerant is driven into the evaporator to form a gas-liquid mixed state in the evaporator, which has large flow resistance and causes uneven heat exchange and a large decrease in heat exchange capacity, far from reaching the rated heat exchange capacity of the air conditioner. Secondly, when the fluorine pump works and the compressor stops in the low temperature season, the surface of the outdoor condenser is covered with a film of compressor refrigeration oil, which reduces the heat exchange efficiency of the heat exchanger and causes the heat exchange capacity to decrease. Therefore, the fluorine pump operation mode cannot produce enough refrigerating capacity to meet the requirements of the machine room, and can only intervene at very low temperatures (generally below 0℃) to achieve good refrigeration effect. Compared with the double-circuit heat pipe air conditioner, the fluorine pump intervention working environment temperature needs to be low enough, so the proportion of time that can be operated throughout the year is small, and the energy saving efficiency throughout the year is not high, especially in the central and southern regions where the low temperature climate is not long, and there is almost no energy saving effect, which also leads to the use limitation. Practical new type content
[0005] The utility model discloses a kind of air suspension fluorine pump heat pipe air conditioning systems with auxiliary evaporator, with the effect of automatically adjusting refrigeration mode, with higher annual energy efficiency ratio, without higher equipment cost.
[0006] The above technical purpose of the utility model is realized by the following technical scheme: an air suspension fluorine pump heat pipe air conditioning system with auxiliary evaporator, comprising flow control valve, air conditioner evaporator, auxiliary evaporator, fluorine pump, compressor, electromagnetic valve two, the flow control valve is used to control the refrigerant flow to the air conditioner evaporator and / or is used to control the refrigerant flow to the auxiliary evaporator, the auxiliary evaporator is microchannel evaporator, the fluorine pump is connected in series with the auxiliary evaporator, the fluorine pump, the auxiliary evaporator and the air conditioner evaporator are connected in parallel, the compressor is air suspension compressor or magnetic suspension compressor, the electromagnetic valve two is connected in parallel with the compressor.
[0007] By adopting the above technical scheme, in order to further improve the energy efficiency level of the machine room air conditioning equipment, the compressor is preferably an air suspension centrifugal compressor, and the rotor of the air suspension centrifugal compressor is in a suspended state during work and has no friction, so that the traditional compressor refrigeration oil is not needed, the entire refrigeration system is in an oil-free state, the heat exchange efficiency of the evaporator and the condenser is not affected by the refrigeration oil, and thus the overall heat exchange efficiency is higher, which creates better conditions for the fluorine pump to work under low outdoor temperature conditions and solves the problem that the compressor refrigeration oil of the fluorine pump integrated air conditioner reduces the heat exchange rate. However, the structure of the coil type air conditioner evaporator is still not conducive to the evaporation and flow of the gas-liquid mixed refrigerant, and the air suspension centrifugal compressor is more sensitive to the liquid refrigerant entering the compressor, so that if the refrigerant is not completely evaporated in the evaporator and enters the air suspension compressor in a liquid state, cavitation will occur on the rotor surface and the air suspension spring sheet in the compressor, greatly reducing the service life of the compressor. Therefore, it is a difficult technical problem to arrange the air suspension compressor machine room air conditioner to work with the fluorine pump.
[0008] Under this background, the inventors put forward an air suspension fluorine pump heat pipe air conditioner structure with an auxiliary evaporator through theoretical analysis and repeated actual tests. The structure increases an auxiliary evaporator outside the air conditioner evaporator of the existing air suspension compressor air conditioner, and the auxiliary evaporator does not adopt a coil type fin structure but adopts a straight pipe type microchannel structure. The evaporator of this structure is composed of a large number of micro-pipes, the micro-pipes have a capillary effect, and the liquid refrigerant entering the micro-pipes can be quickly evaporated by absorbing heat, and the heat exchange efficiency is high and there is no resistance problem of the coil type evaporator.
[0009] In order to more reasonably distribute the refrigerant amount entering the air conditioner evaporator and the heat pipe evaporator, a flow control valve is arranged on the connecting pipeline of the air conditioner evaporator and the auxiliary evaporator, the flow control valve accurately controls the refrigerant flow entering the expansion valve according to the opening degree of the expansion valve, the refrigerant amount entering the air conditioner evaporator is kept appropriate and accurate, and the remaining refrigerant flow automatically enters the auxiliary evaporator and enters the compressor after being vaporized in the auxiliary evaporator.
[0010] It should be noted that in the utility model, the fluorine pump and the auxiliary evaporator are arranged in series, and the fluorine pump, the auxiliary evaporator and the air conditioner evaporator are arranged in parallel, that is, the combination formed after the fluorine pump and the auxiliary evaporator are arranged in series is arranged in parallel with the air conditioner evaporator. The microchannel evaporator refers to an evaporator adopting a microchannel structure, also known as a microchannel heat exchanger.
[0011] The utility model further provides that: it further includes a solenoid valve one, and the solenoid valve one is arranged in parallel with the fluorine pump.
[0012] The further setting of the utility model discloses: the auxiliary evaporator is straight -tubed microchannel evaporator.
[0013] Through adopting above-mentioned technical scheme, the microtube in microchannel evaporator is straight pipe.
[0014] The further setting of the utility model discloses: including refrigerant pipeline, first bypass pipeline, the air conditioner condenser, the flow control valve are installed in the refrigerant pipeline, one end of the first bypass pipeline is connected in the flow control valve, and the other end is linked with the refrigerant pipeline, the fluorine pump, the auxiliary evaporator are installed on the first bypass pipeline.
[0015] Through adopting above-mentioned technical scheme, the flow control valve can accurately control the refrigerant flow to air conditioner evaporator, and the refrigerant amount entering air conditioner evaporator is kept appropriate.
[0016] The further setting of the utility model discloses: along the refrigerant flow direction, the fluorine pump is located the upstream of the auxiliary evaporator.
[0017] The further setting of the utility model discloses: still include second bypass pipeline, the second bypass pipeline two ends are connected on the refrigerant pipeline respectively, solenoid valve two are installed on the second bypass pipeline.
[0018] Through adopting above-mentioned technical scheme, realize the parallel connection of solenoid valve two and compressor.
[0019] The further setting of the utility model discloses: still include third bypass pipeline, the third bypass pipeline two ends are connected on the first bypass pipeline respectively, solenoid valve one is installed on the third bypass pipeline.
[0020] Through adopting above-mentioned technical scheme, realize the parallel connection of solenoid valve one and fluorine pump.
[0021] The further setting of the utility model discloses: still include condenser, storage liquid ware, expansion valve, the storage liquid ware, the expansion valve are installed on the refrigerant pipeline, along the refrigerant flow direction, the storage liquid ware is located the upstream of the flow control valve, and the flow control valve is located the upstream of the expansion valve.
[0022] The further setting of the utility model discloses: the flow control valve is electronic flow control valve.
[0023] The further setting of the utility model discloses: the air conditioner evaporator is disc pipe type evaporator.
[0024] Through adopting above-mentioned technical scheme, air conditioner evaporator adopts conventional disc pipe fin structure.
[0025] The utility model discloses beneficial effect is: the utility model has compressor forced refrigeration mode, compressor and fluorine pump simultaneous operation's mixed refrigeration mode, compressor stops working and fluorine pump refrigeration mode of working, compressor and fluorine pump stop working's gravity heat pipe refrigeration mode four kinds of working mode, along with the change of outdoor temperature, the mode and the speed of change of refrigerant condensation in the outdoor, and the air conditioning system is adjusted automatically according to outdoor temperature and refrigerant condensation speed mode, and preferentially with the mode of higher energy efficiency operation, thereby reach the target of reducing air conditioning power consumption greatly. The scheme has higher annual energy efficiency ratio, does not increase higher equipment cost, and can intelligent stable operation, is a very worth popularization and application's solution. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 It is structural schematic diagram of example 1.
[0027] In the drawing, 1, air conditioning evaporator;2, compressor;3, condenser;4, storage liquid ware;5, flow control valve;6, expansion valve;7, fluorine pump;8, auxiliary evaporator;9, electromagnetic valve one;10, electromagnetic valve two;11, first bypass pipeline;12, second bypass pipeline;13, third bypass pipeline;14, refrigerant pipeline. DETAILED DESCRIPTION
[0028] Example 1: a kind of auxiliary evaporator's air suspension fluorine pump heat pipe air conditioning system, as shown in Figure 1 Including air conditioning evaporator 1, compressor 2, condenser 3, storage liquid ware 4, expansion valve 6, these components are connected by refrigerant pipeline 14. Air conditioning evaporator 1 adopts disc tube fin structure, and compressor 2 is air suspension compressor 2. The refrigerant pipeline 14 between storage liquid ware 4 and expansion valve 6 is installed with flow control valve 5, and flow control valve 5 is electronic flow control valve 5. Along the refrigerant flow direction, storage liquid ware 4 is located in the upstream of flow control valve 5, and flow control valve 5 is located in the upstream of expansion valve 6
[0029] Flow control valve 5 is connected with first bypass pipeline 11, and the end of first bypass pipeline 11 away from flow control valve 5 is communicated with refrigerant pipeline 14. First bypass pipeline 11 is installed with fluorine pump 7 and auxiliary evaporator 8, fluorine pump 7 and auxiliary evaporator 8 are arranged in series, and the combination formed after fluorine pump 7 and auxiliary evaporator 8 are connected in series is arranged in parallel with air conditioning evaporator 1. Along the refrigerant flow direction, fluorine pump 7 is located in the upstream of auxiliary evaporator 8. Auxiliary evaporator 8 is straight tube type microchannel heat exchanger, which includes a plurality of thin straight tubes.
[0030] The first bypass pipeline 11 is connected with the third bypass pipeline 13, the two ends of the third bypass pipeline 13 are connected on the first bypass pipeline 11 respectively, the third bypass pipeline 13 is installed with the electromagnetic valve one 9, the electromagnetic valve one 9 is arranged in parallel with the fluorine pump 7. The air suspension fluorine pump heat pipe air conditioning system with auxiliary evaporator further comprises a second bypass pipeline 12, the two ends of the second bypass pipeline 12 are connected on the refrigerant pipeline 14 upstream of the compressor 2 and the refrigerant pipeline 14 downstream respectively, the second bypass pipeline 12 is installed with the electromagnetic valve two 10, the electromagnetic valve two 10 is arranged in parallel with the compressor 2.
[0031] Working principle: the air suspension fluorine pump heat pipe air conditioning system with auxiliary evaporator has four refrigeration working modes:
[0032] Mode 1: the compressor 2 forces refrigeration, at this time, the electromagnetic valve two 10 is closed, the electromagnetic valve one 9 is closed, and the fluorine pump 7 does not work. The refrigerant absorbs heat and evaporates in the air conditioner evaporator 1, the gaseous refrigerant is compressed into the outdoor condenser 3 by the air suspension compressor 2, and then returns to the indoor, completes the refrigeration cycle, and is called the compressor 2 refrigeration mode.
[0033] Mode 2: mixed refrigeration mode, at this time, the compressor 2 and the fluorine pump 7 work simultaneously, the electromagnetic valve two 10 is closed, and the electromagnetic valve one 9 is closed. The refrigerant is divided into two parts by the flow control valve 5, one part enters the air conditioner evaporator 1 to absorb heat and evaporate, and the other part enters the auxiliary evaporator 8 to evaporate driven by the fluorine pump 7, the gaseous refrigerant enters the air suspension compressor 2, is compressed into the outdoor condenser 3, and then returns to the indoor, completes the refrigeration cycle. At this time, the compressor 2 and the fluorine pump 7 work simultaneously, the compressor 2 can work at a lower load, and the energy efficiency ratio is higher than that of mode 1, which is called the mixed mode.
[0034] Mode 3: the fluorine pump 7 works, the compressor 2 stops working, at this time, the electromagnetic valve two 10 is opened, the electromagnetic valve one 9 is closed, and the expansion valve 6 is closed. The refrigerant enters the fluorine pump 7 from the flow control valve 5, is driven into the heat pipe evaporator by the fluorine pump 7, evaporates, the gaseous refrigerant enters the outdoor condenser 3, condenses, and then returns to the indoor, completes the refrigeration cycle. At this time, the fluorine pump 7 works, the compressor 2 stops, and the energy efficiency ratio is higher than that of mode 2, which is called the fluorine pump 7 mode.
[0035] Mode 4: When the condensing speed of refrigerant in outdoor condenser 3 exceeds the evaporating speed of refrigerant in indoor evaporator, and the condition of gravity natural reflux is met, compressor 2 and fluorine pump 7 stop working, at this time electromagnetic valve two 10 opens, electromagnetic valve one 9 opens, refrigerant from flow control valve 5 all directly passes through electromagnetic valve one 9 into auxiliary evaporator 8 to evaporate, because the temperature of refrigerant in auxiliary evaporator 8 is higher than that in outdoor condenser 3 due to the gasification of refrigerant absorbing heat in auxiliary evaporator 8, therefore the pressure in auxiliary evaporator 8 is higher than that in condenser 3, gaseous refrigerant enters outdoor condenser 3 from auxiliary evaporator 8 under the push of pressure difference, releases heat to condense into liquid state and then returns to indoor relying on gravity, to complete the refrigeration cycle. At this time, fluorine pump 7 and compressor 2 are both stopped, the energy efficiency ratio is higher than that of mode 3, which is called gravity heat pipe mode.
[0036] Embodiment 2: A gas suspension fluorine pump heat pipe air conditioning system with auxiliary evaporator, which is different from embodiment 1 in that compressor 2 is a magnetic suspension compressor 2.
Claims
1. An air-suspended fluorine heat pipe air conditioning system with auxiliary evaporator, characterized in that: The application relates to a refrigerant circuit comprising a flow control valve (5) for controlling the refrigerant flow to an air conditioner evaporator (1) and / or for controlling the refrigerant flow to an auxiliary evaporator (8), the auxiliary evaporator (8) being a microchannel evaporator, a fluorine pump (7) connected in series with the auxiliary evaporator (8), the fluorine pump (7) and the auxiliary evaporator (8) being connected in parallel with the air conditioner evaporator (1), a compressor (2) being a gas-suspended compressor (2) or a magnetic-suspended compressor (2), and a solenoid valve II (10) connected in parallel with the compressor (2).
2. The gas suspension fluorinum heat-pipe air-conditioning system with auxiliary evaporator according to claim 1, characterized in that: The application further comprises a solenoid valve I (9) connected in parallel with the fluorine pump (7).
3. The air-suspended fluorin-pumped heat-pipe air-conditioning system with an auxiliary evaporator according to claim 1 or 2, characterized in that: The auxiliary evaporator (8) is a straight-tube microchannel evaporator.
4. The gas suspension fluorinum heat-pipe air-conditioning system with auxiliary evaporator according to claim 2, characterized in that: The application further comprises a refrigerant pipeline (14), the air conditioner evaporator (1) and the flow control valve (5) being installed on the refrigerant pipeline (14), a first bypass pipeline (11) having one end connected to the flow control valve (5) and the other end connected to the refrigerant pipeline (14), the fluorine pump (7) and the auxiliary evaporator (8) being installed on the first bypass pipeline (11).
5. A gas suspension fluorinum heat pipe air conditioning system with auxiliary evaporator according to claim 4, characterized in that: The fluorine pump (7) is located upstream of the auxiliary evaporator (8) in the refrigerant flow direction.
6. A gas suspension fluorinum heat pipe air conditioning system with auxiliary evaporator according to claim 4, characterized in that: The application further comprises a second bypass pipeline (12) having two ends connected to the refrigerant pipeline (14), the solenoid valve II (10) being installed on the second bypass pipeline (12).
7. The gas suspension fluorinum heat-pipe air-conditioning system with auxiliary evaporator according to claim 4, characterized in that: The application further comprises a third bypass pipeline (13) having two ends connected to the first bypass pipeline (11), the solenoid valve I (9) being installed on the third bypass pipeline (13).
8. A gas suspension fluorinum heat pipe air conditioning system with auxiliary evaporator according to claim 4, characterized in that: The application further comprises a condenser (3), a storage liquid container (4) and an expansion valve (6), the storage liquid container (4) and the expansion valve (6) being installed on the refrigerant pipeline (14), the storage liquid container (4) being located upstream of the flow control valve (5) and the flow control valve (5) being located upstream of the expansion valve (6) in the refrigerant flow direction.
9. The air-suspended fluorin-pumped heat-pipe air-conditioning system with auxiliary evaporator according to claim 1 or 2, characterized in that: The flow control valve (5) is an electronic flow control valve (5).
10. The air-suspended fluorinum heat-pipe heat exchanger air conditioning system with auxiliary evaporator according to claim 1 or 2, characterized in that: The air conditioner evaporator (1) is a coil-type evaporator.