CN101813347A - Energy saving method for water system of central air conditioner and micro-energy-consumption water system - Google Patents

Energy saving method for water system of central air conditioner and micro-energy-consumption water system Download PDF

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CN101813347A
CN101813347A CN200910105531A CN200910105531A CN101813347A CN 101813347 A CN101813347 A CN 101813347A CN 200910105531 A CN200910105531 A CN 200910105531A CN 200910105531 A CN200910105531 A CN 200910105531A CN 101813347 A CN101813347 A CN 101813347A
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water
air
heat exchanger
pipe
heat
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CN200910105531A
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CN101813347B (en
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胡光南
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胡光南
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Abstract

The invention discloses an energy saving method for a water system of a central air conditioner. In the method, water absorbs or releases heat of a refrigerant in the air conditioner, indoor air serving as load and outdoor air serving as a cold source or a heat source in the phase change process of a liquid phase and a gas phase to complete heat transfer between the main machine of the air conditioner and tail equipment; and the water system of the air conditioner is made into a closed pipeline system, air in a closed loop is discharged, and gas-liquid water is filled into the loop. A micro-energy-consumption water system designed according to the energy saving method for the water system of the central air conditioner comprises an evaporation heat exchanger (20), a condensing heat exchanger (30) and a pipeline (10) serially connecting the heat exchangers into a closed loop. The closed loop can serve as a coolant (heat medium) water system, a cooling water system or a heat source water system. The coolant water is subjected to phase change of gas and liquid phases, the water amount and the water pump power required by the transfer of the same heat are less than 1/100 of the water amount and the water pump power in the prior art; the energy consumption in the water system of the whole air conditioner can be negligible; one set of central air conditioner can save about RMB 1,000 yuan of the electric charge of the water pump everyday; the size of the central air conditioner is greatly decreased; the investment of equipment at one time is also greatly decreased; and the efficiency is greatly improved. Therefore, the energy saving method of the invention can bring key reform to the technology of the central air conditioner.

Description

The power-economizing method of central air conditioning water system and little energy consumption water system
Technical field
The present invention relates to the water system of central air-conditioning, particularly utilize the phase transition process of water to transmit the air-conditioner water system that heat comprises cold.
Background technology
The water system of existing central air-conditioning comprises cold (heat) matchmaker's water system and cooling water system, its effect is to transmit heat, its operation principle is: chilled water and cooling water circulate in pipeline separately, chilled water in air-conditioner host to the evaporimeter release heat and the cooling that self is cooled (about) to 7 ℃, water at low temperature flows into the heat exchanger (surface cooler) of air-conditioning load end (air-conditioned room), carry out heat exchange with processed air, absorb the heat of air and heat up (to about 12 ℃), and then flow back in the main frame, so constantly circulation is delivered to load end to the cold that produces in the main frame; On the contrary, cooling water then is the heat that absorptive condenser discharges in air-conditioner host and self is heated up, high-temperature cooling water flows into outdoor heat exchanger (cooling tower), carry out heat exchange with outside air and lower the temperature, and then flow back in the main frame, so constantly circulate, the heat that produces in the main frame is delivered in the outdoor air goes.The transmission of above heat is that the attitude by water becomes and finishes, and promptly chilled water temperature in circulation once changes 5K approximately, and the heat of then every kg water transmission is 5kcal.How required the more water yield of the heat that transmits be just big more.In addition, chilled water need be delivered to each floor of high building, need overcome the deadweight and the resistance of ducting of water, and water also needs certain pressure.So must have water pump that the quantity of circulating water of certain pressure head is provided in the circulation line, the power of the water pump group of general central air conditioner system reaches hundreds of kilowatts, the operation electricity charge of its consumption account for a big chunk of the total electricity charge of air-conditioning, can be up to 20%.The operating cost that one cover central air conditioner system was used for water pump in one day may become a key factor of aggravation energy crisis up to more than thousand yuan.Recently, people have carried out a large amount of research and practice aspect central air-conditioning energy, water system energy-conservation is most important parts wherein, and its method nearly all is the VFC of pump motor, is used for being in the light hours at air-conditioning and reduces pump rotary speed so that reduce the water delivery flow, thereby minimizing power consumption, what have reaches good effect, can save 40% of water pump power consumption at most, even like this, the energy consumption of water system is still very considerable, and the central air-conditioning energy consumption problem does not solve yet at all.
Summary of the invention
The objective of the invention is provides a kind of new power-economizing method of central air conditioning water system for overcoming the existing high problem of air-conditioner water system energy consumption, and according to said method design a kind of new air-conditioner water system, so that further reduce the power consumption of existing air-conditioner water system significantly.
For achieving the above object, the present invention proposes a kind of new power-economizing method of central air conditioning water system: the phase transition process of water between liquid and gas finished the transmission of heat between air-conditioner host and end-equipment to extraneous medium draw heat and release heat; Concrete technical scheme is: air-conditioner water system is made the closing pipe line system, comprise evaporating heat exchanger, condensing heat exchanger in the described closing pipe line system and they are concatenated into the pipeline of loop, air in the loop is discharged, charge into solution-air two-phase water: in two heat exchangers, be the coexistence of solution-air two-phase water, connect in the pipeline of their lower port and be full of liquid phase water, this segment pipe is a water pipe, connects in the pipeline of two heat exchanger upper port to be full of saturated vapor, and this segment pipe is a steam pipe.
When system moves, two-phase water circulates the phase co-conversion of concurrent anger-liquid two-phase in loop: in evaporating heat exchanger, the heat that liquid phase water is drawn extraneous medium is vaporizated into gas phase, gas phase water flows in the condensing heat exchanger from steam pipe, discharge heat of vaporization and be condensed into liquid phase to extraneous medium therein, liquid phase water enters evaporating heat exchanger from water pipe and vaporizes once more, and so constantly circulation constantly is delivered to condensing heat exchanger to heat from evaporating heat exchanger by phase transition process; In the dynamic process of system's operation, be liquid-gas two-phase water coexisting state in two heat exchangers.
Described central air conditioning water system is chilled-water system or the cooling water system in the kind of refrigeration cycle, when air-conditioning then is heat medium water system or heat source water system when heating periodic duty; Described extraneous medium be in the central air-conditioning cold-producing medium, as the indoor pending air of load with as the outdoor air of low-temperature receiver or thermal source.
The little energy consumption water system of a kind of central air-conditioning according to the design of the power-economizing method of above central air conditioning water system, it is a closing pipe line system, comprise evaporating heat exchanger 20, condensing heat exchanger 30 and they are concatenated into the pipeline 10 of loop, pipeline 10 comprises water pipe 11 and steam pipe 12, water pipe 11 comprises water-main 111 and branching pipe 112, the lower port 21 of their port and evaporating heat exchanger 20, the lower port 31 of condensing heat exchanger 30 connects, steam pipe 12 comprises total steam pipe 121 and branch trachea 122, the upper port 22 of their port and evaporating heat exchanger 20, the upper port 32 of condensing heat exchanger 30 connects; Air in the loop is discharged, charge into solution-air two-phase water therein: in two heat exchangers,, be full of liquid phase water in the water pipe 11, be full of saturated vapor in the steam pipe 12 for the coexistence of solution-air two-phase water; When system moved, two-phase water circulated the mutual conversion of concurrent anger-liquid two-phase in loop.
In the air-conditioning of pressing the cooling condition operation, described water system is a chilled-water system, its evaporating heat exchanger 20 is surface cooler 20a of air-conditioning load end, surface cooler is the boiling type heat exchanger, comprise finned vertical tube 21a, hermetically connect the liquid phase communicating pipe 22a of vertical tube lower port, connect the gas phase communicating pipe 23a of riser upper end mouth and hermetically to the blower fan 24a of fin air-supply, pass to chilled water in the pipe; Surface cooler 20a also can be fan coil or finned tube exchanger; The extraneous medium that makes it to evaporate with chilled water heat exchange in the evaporating heat exchanger is at the outer mobile indoor air to be freezed as load of pipe; The condensing heat exchanger 30 of chilled-water system is again the evaporimeter 30a of air-conditioner host simultaneously, structural shape is a shell-tube type, comprise that inside is full of the closure casing 33a of gas phase refrigerant water and by the coil pipe 34a that has heat exchange fin in the housing, coil pipe inside passes to the cold-producing medium to be evaporated of air-conditioner host, and the extraneous medium that makes it condensation in condensing heat exchanger 30 with the heat exchange of gas phase refrigerant water is the cold-producing medium in the air-conditioner host.
For obtaining high as far as possible heat exchange efficiency, described evaporating heat exchanger 20 middle water levels should be set in the gas phase communicating pipe 23a at top or top, and the above space that only need leave necessity of the water surface is used to converge the water vapour that is evaporated and gets final product.This setting height that be to keep water level needs an altitude valve 50 is installed, and is in same floor, the shared altitude valve of a plurality of evaporating heat exchangers that setting height(from bottom) is identical.Altitude valve 50 comprises expenditure and pressure valve 51 and is installed on the level sensor 52 at water surface place, the aperture of the water level signal control expenditure and pressure valve 51 that level sensor 52 sends, thus control discharge keeps water level certain.
Described expenditure and pressure valve 51 comprises the electromagnetic regulator 512 of spool 511 and regulating spool aperture, level sensor 52 comprises the float 521 of carry magnet and near switch 522, send the action of regulating command control electromagnetic regulator near switch according to the height of float, thus the aperture of regulating spool 511.
Altitude valve 50 also can be with the float-ball type structure of pure machinery.
Be installed in the lower floor of high building in the said system as if air-conditioner host, then described evaporating heat exchanger 20 installation sites are higher than condensing heat exchanger 30, in described water pipe 11, also should be connected in series a water pump 40 that is used for water is delivered to from condensing heat exchanger evaporating heat exchanger, water pump 40 is a plunger displacement pump, also can be vane pump or centrifugal pump.If air-conditioner host is installed in roof, described evaporating heat exchanger 20 installation sites are lower than condensing heat exchanger 30, and the weight difference that described two-phase water circulates in loop by two-phase water drives.
Still during off-duty, the temperature in the described closing pipe line equals room temperature to air-conditioning system, and then the absolute pressure of the water vapour in it is equivalent to the saturated vapor pressure under this temperature.After air-conditioner host brought into operation, the temperature of the interior two-phase water of described condensing heat exchanger 30 (also being the evaporimeter of main frame) began to reduce, and water vapour begins to be condensed into water.If setting the nominal operation temperature of chilled water is 10 ℃ (the visual concrete condition of this design temperature is chosen in 7-12 ℃ of scope in the real system), then 10 ℃ is the matching point of condensing heat exchanger, and this moment, the corresponding interior absolute pressure of closing pipe line was 0.0125ata (standard atmospheric pressure).10 ℃ chilled water enters the evaporating heat exchanger in the air-conditioned room, absorbs the heat of extraneous hot-air to be cooled therein and is evaporated to water vapour, enters condensing heat exchanger along steam pipe again, realizes the working cycles of chilled water.If the closed conduct insulation is good, two-phase water is near the isothermal phase change process in the whole circulation, and variations in temperature is very little.
Above-mentioned air-conditioning is if heat-pump-type, then press the heating condition operation in the winter time, described water system then is the heat medium water system, the radiator 30b of air-conditioning load end has also just become condensing heat exchanger 30, but it is constant with said system that its structure can keep fully, comprise finned vertical tube 31b, the liquid phase communicating pipe 32b that connects the vertical tube lower port hermetically, the gas phase communicating pipe 33b that connects the riser upper end mouth hermetically, blower fan 34b to the fin air-supply, pass to the gas phase heat medium water in the pipe, it flows into liquid phase communicating pipe 32b at in-tube condensation Cheng Shuihou by deadweight, and then in the branching pipe 112 that is connected with condensing heat exchanger of inflow, need this moment in branching pipe 112 one of polyphone to be used to the check valve 35b that prevents that liquid phase water from blowing back into; Radiator also can be the steam heating type radiator.The extraneous medium that makes it condensation with gas phase heat medium water heat exchange in the condensing heat exchanger is at the outer mobile indoor air to be heated as load of pipe; The evaporating heat exchanger 20 of heat medium water system also is the condenser 20b of air-conditioner host simultaneously, structural shape also can be identical with the evaporimeter 30a of the above-mentioned air-conditioner host of pressing cooling condition when operation, be shell-tube type, comprise that inside is full of the closure casing 21b of heat medium water and by the coil pipe 22b in the housing, coil pipe inside passes to the condensed refrigerant for the treatment of of air-conditioner host, the extraneous medium that makes it to evaporate with the water heat exchange in evaporating heat exchanger is the cold-producing medium in the air-conditioner host, also altitude valve need be set, the level sensor of altitude valve is arranged on the top of evaporimeter.
When heating condition, be set at 40 ℃ if set the operating temperature of heat medium water, the operating pressure of the water vapour in the then described closing pipe line is about 0.075ata.
Described water system also can be used for cooling water system, when cooling condition, its condensing heat exchanger 30 is cooling tower 30c of outer end, water-cooled air conditioning chamber, comprise finned vertical tube, hermetically connect the liquid phase communicating pipe of vertical tube lower port, connect gas phase communicating pipe of riser upper end mouth and hermetically to the blower fan of fin air-supply, pass to the gas phase cooling water in the pipe; Radiator also can be the steam heating type radiator, the extraneous medium that makes it condensation with gas phase cooling water heat exchange in the condensing heat exchanger be pipe outer mobile as low-temperature receiver outdoor air; The evaporating heat exchanger 20 of cooling water system is again the condenser 20c of air-conditioner host simultaneously, structural shape is a shell-tube type, comprise that inside is full of the closure casing 21c of cooling water and by the coil pipe 22c in the housing, coil pipe inside passes to treats condensed refrigerant, with water heat exchange in the evaporating heat exchanger and the extraneous medium that makes it to evaporate is the cold-producing medium in the air-conditioner host.
Above-mentioned air-conditioning is if heat-pump-type, then when heating condition, described water system is the heat source water system, its evaporating heat exchanger 20 is heat exchanger 20d of outer end, air conditioning chamber, can be identical with the condensing heat exchanger 30 of above cooling condition, comprise finned vertical tube, hermetically connect the liquid phase communicating pipe of vertical tube lower port, connect gas phase communicating pipe of riser upper end mouth and hermetically to the blower fan of fin air-supply, pass to heat source water in the pipe; Evaporating heat exchanger also can be fan coil or finned tube exchanger; The extraneous medium that makes it to evaporate with heat source water heat exchange in the evaporating heat exchanger is at the outer mobile outdoor air as thermal source of pipe; The condensing heat exchanger 30 of heat source water system is again the evaporimeter 30d of air-conditioner host simultaneously, structural shape is also identical with the evaporating heat exchanger of above-mentioned cooling condition operation, be shell-tube type, comprise that inside is full of the closure casing of gas phase heat source water and by the coil pipe that has heat exchange fin in the housing, coil pipe inside passes to the cold-producing medium to be evaporated of air-conditioner host, with gas phase heat source water heat exchange in the condensing heat exchanger and the extraneous medium that makes it condensation is the cold-producing medium in the air-conditioner host.
Beneficial effect of the present invention:
Chilled water of the present invention 10 ℃ is in once circulating, one not good liquor-gas phase takes place to be become, transmit same heat institute water requirement and have only 1/118 of traditional air-conditioning, carrying capacity and pump power relation in direct ratio in theory with pressure, so the power that this patent water system consumes is less than 1/100 of prior art, the energy consumption of whole air-conditioning system grey water system almost can be omitted and be disregarded, one cover central air-conditioning can be saved water pump electricity charge nearly 1,000 yuan average every day, and size reduces greatly, and the disposable apparatus investment also significantly reduces.In addition, because the operating temperature in the A/C evaporator is brought up to 10 ℃ by 7 ℃, its efficient can significantly improve.So the present invention can be the central air-conditioning technology and brings major transformation.
Description of drawings
Fig. 1 is the systematic schematic diagram of the embodiment of the invention 1 at cooling condition.
Fig. 2 is the schematic diagram of the evaporating heat exchanger of the embodiment of the invention 1.
Fig. 3 is the condensing heat exchanger schematic diagram of the embodiment of the invention 1.
Fig. 4 is the schematic diagram of the altitude valve of the embodiment of the invention 1.
Fig. 5 is the systematic schematic diagram of the embodiment of the invention 1 at heating condition.
Fig. 6 is the systematic schematic diagram of the embodiment of the invention 2 at cooling condition.
Fig. 7 is the systematic schematic diagram of the embodiment of the invention 2 at heating condition.
The specific embodiment
Embodiment 1
The little energy consumption of a kind of central air-conditioning cold (heat) matchmaker water system is shown in Fig. 1,2,3,4,5.It is a closing pipe line system, comprise evaporating heat exchanger 20, condensing heat exchanger 30 and they are concatenated into the pipeline 10 of loop, pipeline 10 comprises water pipe 11 and steam pipe 12, water pipe 11 comprises water-main 111 and branching pipe 112, their port is connected with the lower port 21 of evaporating heat exchanger 20, the lower port 31 of condensing heat exchanger 30, steam pipe 12 comprises total steam pipe 121 and branch trachea 122, and their port is connected with the upper port 22 of evaporating heat exchanger 20, the upper port 32 of condensing heat exchanger 30; Air in the loop is all discharged, and is full of solution-air two-phase water therein, is full of liquid phase water in evaporating heat exchanger and water pipe, and being full of gas phase water in condensing heat exchanger and steam pipe is saturated vapor; When system moved, two-phase water circulated the mutual conversion of concurrent anger-liquid two-phase in loop.
Fig. 1 is a chilled-water system, its evaporating heat exchanger 20 is surface cooler 20a of air-conditioning load end, surface cooler is the boiling type heat exchanger, as shown in Figure 2, comprise finned vertical tube 21a, hermetically connect the liquid phase communicating pipe 22a of vertical tube lower port, connect the gas phase communicating pipe 23a of riser upper end mouth and hermetically to the blower fan 24a of fin air-supply, pass to chilled water in the pipe; Surface cooler 20a also can be fan coil or finned tube exchanger; The extraneous medium that makes it to evaporate with chilled water heat exchange in the evaporating heat exchanger is at the outer mobile indoor air to be freezed as load of pipe;
The condensing heat exchanger 30 of chilled-water system is again the evaporimeter 30a of air-conditioner host 60 simultaneously, structural shape is a shell-tube type, as shown in Figure 3, comprise that inside is full of the closure casing 33a of gas phase refrigerant water and by the coil pipe 34a that has heat exchange fin in the housing, coil pipe inside passes to the cold-producing medium to be evaporated of air-conditioner host, and the extraneous medium that makes it condensation in condensing heat exchanger 30 with the heat exchange of gas phase refrigerant water is the cold-producing medium in the air-conditioner host.
For obtaining high as far as possible heat exchange efficiency, described evaporating heat exchanger 20 middle water levels should be set in the gas phase communicating pipe 23a at top, and the above space that only need leave necessity of the water surface is used to converge the water vapour that is evaporated and gets final product.For keeping this setting height of water level, need to install an altitude valve 50, as shown in Figure 4.Be in same floor, the shared altitude valve of a plurality of evaporating heat exchangers that setting height(from bottom) is identical.Altitude valve 50 comprises expenditure and pressure valve 51 and level sensor 52, the aperture of the water level signal control expenditure and pressure valve 51 that level sensor 52 sends, thus control discharge keeps water level certain; Altitude valve 50 also can be with the float-ball type structure of pure machinery.
Described expenditure and pressure valve 51 comprises the electromagnetic regulator 512 of spool 511 and regulating spool aperture, level sensor 52 comprises the float 521 of carry magnet and near switch 522, send the action of regulating command control electromagnetic regulator near switch according to the height of float, thus the aperture of regulating spool 511.
Be installed in the lower floor of high building in the said system as if air-conditioner host, then described evaporating heat exchanger 20 installation sites are higher than condensing heat exchanger 30, as shown in Figure 1, in described water pipe 11, also should be connected in series one and be used for water is delivered to the water pump 40 of evaporating heat exchanger from condensing heat exchanger, be used for the evaporating heat exchanger that liquid phase chilled water with lower rises to eminence and go.Chilled water nominal operation temperature is if be set at 10 ℃, its latent heat of phase change is 591.8kcal/kg, and existing air conditioner coolant water temperature in once circulating changes about 5K approximately, the heat of every kg water transmission is about 5kcal, so, chilled water of the present invention is in once circulating, one not good liquor-gas phase takes place to be become, the heat that every kg transmits be about traditional air-conditioning 118 times, promptly transmit same heat institute water requirement and have only 1/118, almost can omit and disregard, only need a micro pump, available plunger displacement pump also can be with vane pump or centrifugal pump.
If air-conditioner host is installed in roof, described evaporating heat exchanger 20 installation sites are lower than condensing heat exchanger 30, and the weight difference that described two-phase water circulates in loop by two-phase water drives, and do not need water pump in the system this moment.
This example can be used for heat pump air conditioner, and Fig. 5 is the schematic diagram of system shown in Figure 1 at heating condition.Shown water system is the heat medium water system, and the flow direction of its heat medium water and steam is opposite with Fig. 1.The radiator 30b of air-conditioning load end is condensing heat exchanger 30 at this moment, but it is constant with said system that its structure can keep fully, comprise finned vertical tube 31b, the liquid phase communicating pipe 32b that connects the vertical tube lower port hermetically, the gas phase communicating pipe 33b that connects the riser upper end mouth hermetically, blower fan to the fin air-supply, pass to the gas phase heat medium water in the pipe, it flows into liquid phase communicating pipe 32b at in-tube condensation Cheng Shuihou by deadweight, and then in the branching pipe 112 that is connected with condensing heat exchanger of inflow, flow into condenser 20b by water pipe 11 at last, need this moment in branching pipe 112 one of polyphone to be used to the check valve 35b that prevents that liquid phase water from blowing back into; Radiator also can be the steam heating type radiator.The extraneous medium that makes it condensation with gas phase heat medium water heat exchange in the condensing heat exchanger is at the outer mobile indoor air to be heated as load of pipe; The evaporating heat exchanger 20 of heat medium water system also is the condenser 20b of air-conditioner host simultaneously, structural shape also can be identical with the evaporimeter 30a of the above-mentioned air-conditioner host of pressing cooling condition when operation, be shell-tube type, comprise that inside is full of the closure casing of heat medium water and by the coil pipe in the housing, coil pipe inside passes to the condensed refrigerant for the treatment of of air-conditioner host, the extraneous medium that makes it to evaporate with the water heat exchange in evaporating heat exchanger is the cold-producing medium in the air-conditioner host, the level sensor 52 of water level under this operating mode in the evaporimeter and corresponding altitude valve 50 should be arranged on the top, guarantees that water and coil pipe have bigger contact heat-exchanging area.Operating temperatures under this operating mode in the evaporating heat exchanger 20 should be arranged on more than 40 ℃, the actual conditions of viewing system and deciding.
Embodiment 2
The little energy consumption cooling water system of a kind of central air-conditioning shown in Fig. 6,7, comprises evaporating heat exchanger 20, condensing heat exchanger 30 and they is concatenated into the pipeline 10 of loop that pipeline 10 comprises water pipe 11 and steam pipe 12.Figure 6 shows that the systematic schematic diagram of this example when cooling condition, its condensing heat exchanger 30 is equivalent to outdoor heat exchanger of air conditioner 30c, and its structural principle is identical with structure shown in Figure 2, also can adopt the outdoor heat spreader structures of existing air-cooled air-conditioning system.The extraneous medium that makes it condensation with cooling water steam heat-exchanging in the condensing heat exchanger be pipe outer mobile as low-temperature receiver outdoor air.
The evaporating heat exchanger 20 of cooling water system is again the condenser 20c of air-conditioner host 60 simultaneously, structural shape is a shell-tube type, comprise that inside is full of the closure casing 21c of cooling water and by the coil pipe 22c in the housing, coil pipe inside passes to treats condensed refrigerant, with water heat exchange in the evaporating heat exchanger and the extraneous medium that makes it to evaporate is the cold-producing medium in the air-conditioner host, the heat gasification of liquid cooled water absorption refrigeration agent in closure casing 21c is water vapour, enter condensing heat exchanger through steam pipe 12 then and be cooled to liquid state, get back to evaporating heat exchanger 20c through water pipe 11 again by outdoor air.
Native system also can be used for heat pump air conditioner, Figure 7 shows that the systematic schematic diagram of this example when heating condition, when heating condition, described water system is the heat source water system, its evaporating heat exchanger 20 is heat exchanger 20d of air-conditioning 60 outdoor ends, can be identical with the condensing heat exchanger 30 of above cooling condition; The extraneous medium that makes it to evaporate with heat source water heat exchange in the evaporating heat exchanger is at the outer mobile outdoor air as thermal source of pipe; The condensing heat exchanger 30 of heat source water system is again the evaporimeter 30d of air-conditioner host simultaneously, structural shape is also identical with the evaporating heat exchanger of above-mentioned cooling condition operation, be shell-tube type, but, the coil pipe outer wall should have fin 221c, with the contact area of increase with steam, coil pipe inside passes to the cold-producing medium to be evaporated of air-conditioner host, with gas phase heat source water heat exchange in the condensing heat exchanger and the extraneous medium that makes it condensation is the cold-producing medium in the air-conditioner host, cold-producing medium goes in the main frame for getting back to behind the steam in the heat gasification of evaporimeter 30d absorption gas phase heat medium water, gas phase heat medium water heat release is condensed into liquid phase and enters evaporating heat exchanger through water pipe simultaneously, and the heat gasification that absorbs outside air is got back to evaporimeter 30d through steam pipe again for water vapour.

Claims (10)

1. the power-economizing method of a central air conditioning water system, it is characterized in that: the phase transition process of water between liquid and gas finished the transmission of heat between air-conditioner host and end-equipment to extraneous medium draw heat and release heat; Concrete technical scheme is: air-conditioner water system is made the closing pipe line system, comprise evaporating heat exchanger, condensing heat exchanger in the described closing pipe line system and they are concatenated into the pipeline of loop, air in the loop is discharged, charge into solution-air two-phase water: in two heat exchangers, be the coexistence of solution-air two-phase water, connect in the pipeline of their lower port and be full of liquid phase water, this segment pipe is a water pipe, connects in the pipeline of two heat exchanger upper port to be full of saturated vapor, and this segment pipe is a steam pipe;
When system moves, two-phase water circulates the mutual conversion of concurrent anger-liquid two-phase in loop: in evaporating heat exchanger, the heat that liquid phase water is drawn extraneous medium is vaporizated into gas phase, gas phase water flows in the condensing heat exchanger from steam pipe, discharge heat of vaporization and be condensed into liquid phase to extraneous medium therein, liquid phase water enters evaporating heat exchanger from water pipe and vaporizes once more, and so constantly circulation is delivered to condensing heat exchanger to heat from evaporating heat exchanger; In the dynamic process of system's operation, be solution-air two-phase water coexisting state in two heat exchangers.
2. the power-economizing method of central air conditioning water system according to claim 1, it is characterized in that: described central air conditioning water system is chilled-water system or the cooling water system in the kind of refrigeration cycle, when air-conditioning then is heat medium water system or heat source water system when heating periodic duty; Described extraneous medium be in the central air-conditioning cold-producing medium, as the indoor pending air of load with as the outdoor air of low-temperature receiver or thermal source.
3. according to the little energy consumption water system of a kind of central air-conditioning of the power-economizing method of above central air conditioning water system design, it is characterized in that: it is a closing pipe line system, comprise evaporating heat exchanger (20), condensing heat exchanger (30) and they are concatenated into the pipeline (10) of loop, pipeline (10) comprises water pipe (11) and steam pipe (12), water pipe (11) comprises water-main (111) and branching pipe (112), the lower port (21) of their port and evaporating heat exchanger (20), the lower port (31) of condensing heat exchanger (30) connects, steam pipe (12) comprises total steam pipe (121) and branch trachea (122), the upper port (22) of their port and evaporating heat exchanger (20), the upper port (32) of condensing heat exchanger (30) connects; Air in the loop is discharged, charge into solution-air two-phase water therein: in two heat exchangers,, be full of liquid phase water in the water pipe (11), be full of saturated vapor in the steam pipe (12) for the coexistence of solution-air two-phase water; When system moved, two-phase water circulated the mutual conversion of concurrent anger-liquid two-phase in loop.
4. the little energy consumption water system of central air-conditioning according to claim 3, it is characterized in that: described water system is a chilled-water system, its evaporating heat exchanger (20) is the surface cooler (20a) of air-conditioning load end, surface cooler is the boiling type heat exchanger, comprise finned vertical tube (21a), hermetically connect the liquid phase communicating pipe (22a) of vertical tube lower port, connect gas phase communicating pipe (23a) of riser upper end mouth and hermetically to the blower fan (24a) of fin air-supply; The extraneous medium that makes it to evaporate with chilled water heat exchange in the evaporating heat exchanger is at the outer mobile indoor air to be freezed as load of pipe; Surface cooler (20a) also can be fan coil or finned tube exchanger;
The condensing heat exchanger of chilled-water system (30) is again the evaporimeter (30a) of air-conditioner host simultaneously, structural shape is a shell-tube type, comprise that inside is full of the closure casing of gas phase refrigerant water (31a) and by the coil pipe that has heat exchange fin (32a) in the housing, coil pipe inside passes to the cold-producing medium to be evaporated of air-conditioner host, and the extraneous medium that makes it condensation in condensing heat exchanger (30) with the heat exchange of gas phase refrigerant water is the cold-producing medium in the air-conditioner host.
5. the little energy consumption water system of central air-conditioning according to claim 3, it is characterized in that: described water system is the heat medium water system, its condensing heat exchanger (30) is the cooling tower (30b) of air-conditioning load end, comprise finned vertical tube (31b), hermetically connect the liquid phase communicating pipe (32b) of vertical tube lower port, hermetically connect the gas phase communicating pipe (33b) of riser upper end mouth, to the blower fan (34b) of fin air-supply be connected in and be used to the check valve (35b) that prevents that liquid phase water from blowing back in the branching pipe (112); The extraneous medium that makes it condensation with gas phase heat medium water heat exchange in the condensing heat exchanger is at the outer mobile indoor air to be heated as load of pipe; Cooling tower also can be the steam heating type radiator;
The evaporating heat exchanger of heat medium water system (20) also is the condenser (20b) of air-conditioner host simultaneously, structural shape is a shell-tube type, comprise that inside is full of the closure casing of heat medium water (21b) and by the coil pipe (22b) in the housing, coil pipe inside passes to the condensed refrigerant for the treatment of of air-conditioner host, and the extraneous medium that makes it to evaporate with the water heat exchange in evaporating heat exchanger is the cold-producing medium in the air-conditioner host.
6. the little energy consumption water system of central air-conditioning according to claim 3, it is characterized in that: described water system is a cooling water system, its condensing heat exchanger (30) is the outdoor heat exchanger (30c) of outer end, air conditioning chamber, comprise finned vertical tube, hermetically connect the liquid phase communicating pipe of vertical tube lower port, connect gas phase communicating pipe of riser upper end mouth and hermetically to the blower fan of fin air-supply; The extraneous medium that makes it condensation with cooling water steam heat-exchanging in the condensing heat exchanger is at the outer mobile outdoor air as low-temperature receiver of pipe;
The evaporating heat exchanger of cooling water system (20) is again the condenser (20c) of air-conditioner host simultaneously, structural shape is a shell-tube type, comprise that inside is full of the closure casing of cooling water (21c) and by the coil pipe (22c) in the housing, coil pipe inside passes to treats condensed refrigerant, with water heat exchange in the evaporating heat exchanger and the extraneous medium that makes it to evaporate is the cold-producing medium in the air-conditioner host.
7. the little energy consumption water system of central air-conditioning according to claim 3, it is characterized in that: described water system is the heat source water system, its evaporating heat exchanger (20) is the heat exchanger (20d) of outer end, air conditioning chamber, comprise finned vertical tube, hermetically connect the liquid phase communicating pipe of vertical tube lower port, connect gas phase communicating pipe of riser upper end mouth and hermetically to the blower fan of fin air-supply, pass to heat source water in the pipe; The extraneous medium that makes it to evaporate with heat source water heat exchange in the evaporating heat exchanger is at the outer mobile outdoor air as thermal source of pipe;
The condensing heat exchanger of heat source water system (30) is again the evaporimeter (30d) of air-conditioner host simultaneously, structural shape is a shell-tube type, comprise that inside is full of the closure casing of gas phase heat source water and by the coil pipe that has heat exchange fin in the housing, coil pipe inside passes to the cold-producing medium to be evaporated of air-conditioner host, with gas phase heat source water heat exchange in the condensing heat exchanger and the extraneous medium that makes it condensation is the cold-producing medium in the air-conditioner host.
8. according to the little energy consumption water system of any described central air-conditioning in the claim 3 to 7, it is characterized in that: described evaporating heat exchanger (20) installation site is higher than in the system of condensing heat exchanger (30), in described water pipe (11), also be connected in series a water pump (40) that is used for water is delivered to from condensing heat exchanger evaporating heat exchanger, water pump (40) is a plunger displacement pump, also can be vane pump or centrifugal pump; Described evaporating heat exchanger (20) installation site is lower than in the system of condensing heat exchanger (30), and the weight difference that described two-phase water circulates in loop by two-phase water drives.
9. according to the little energy consumption water system of any described central air-conditioning in the claim 3 to 7, it is characterized in that: also comprise altitude valve (50), it is used for described evaporating heat exchanger (20) middle water level being kept being located at the setting height on top, the shared altitude valve of a plurality of evaporating heat exchangers that setting height(from bottom) is identical;
10. the little energy consumption water system of central air-conditioning according to claim 9, it is characterized in that: described altitude valve (50) comprises expenditure and pressure valve (51) and level sensor (52), the aperture of the water level signal control expenditure and pressure valve (51) that level sensor (52) sends, thereby control discharge keeps water level certain; Altitude valve (50) also can be with the float-ball type structure of pure machinery.
CN 200910105531 2009-02-24 2009-02-24 Energy saving method for water system of central air conditioner and micro-energy-consumption water system CN101813347B (en)

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CN103822328A (en) * 2012-11-02 2014-05-28 弗莱克斯电子有限责任公司 Energy saving-exhaust control and auto shut off system
CN105299463A (en) * 2015-12-01 2016-02-03 刘印同 Pressurization method and device for cryogenic container

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WO2002048618A1 (en) * 2000-12-16 2002-06-20 Sung-Su Lee Cooling and heating system using jointly the radient with convection
CN1493826A (en) * 2002-11-01 2004-05-05 严振华 Air cooled type air conditioner
CN1554904A (en) * 2003-12-22 2004-12-15 P甲海 Multiple circulation high efficiency full automatic water cooling central air conditioner system

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Publication number Priority date Publication date Assignee Title
CN1138680A (en) * 1995-02-03 1996-12-25 株式会社日立制作所 Heat pump air conditioner for use in cold districts
WO2002048618A1 (en) * 2000-12-16 2002-06-20 Sung-Su Lee Cooling and heating system using jointly the radient with convection
CN2472105Y (en) * 2001-02-28 2002-01-16 曾金石 Apparatus for combined air conditioner with refrigerator
CN1493826A (en) * 2002-11-01 2004-05-05 严振华 Air cooled type air conditioner
CN1554904A (en) * 2003-12-22 2004-12-15 P甲海 Multiple circulation high efficiency full automatic water cooling central air conditioner system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103822328A (en) * 2012-11-02 2014-05-28 弗莱克斯电子有限责任公司 Energy saving-exhaust control and auto shut off system
CN103822328B (en) * 2012-11-02 2018-08-24 弗莱克斯电子有限责任公司 Energy saving gas exhaust inspecting and automatically cut off system
CN105299463A (en) * 2015-12-01 2016-02-03 刘印同 Pressurization method and device for cryogenic container

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