CN102620465B - Pump-free jet refrigerating machine - Google Patents

Pump-free jet refrigerating machine Download PDF

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Publication number
CN102620465B
CN102620465B CN201210101671.8A CN201210101671A CN102620465B CN 102620465 B CN102620465 B CN 102620465B CN 201210101671 A CN201210101671 A CN 201210101671A CN 102620465 B CN102620465 B CN 102620465B
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fluid reservoir
condenser
communicated
generator
working medium
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CN102620465A (en
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陈光明
陈少杰
戴征舒
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Zhejiang University ZJU
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Zhejiang University ZJU
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Abstract

The invention discloses a pump-free jet refrigerating machine. The pump-free jet refrigerating machine comprises a generator, a first ejector, a condenser, a throttling element, an evaporator, a three-way valve, a first liquid storage tank and a first one-way valve, wherein the first ejector is successively connected with the condenser, the throttling element and the evaporator in series so as to form a loop; the three-way valve is successively connected with the first liquid storage tank, the one-way valve and the generator in series so as to form a loop, and a communicated pipeline is arranged between the generator and the first ejector; and a communicated pipeline is arranged between the condenser and the three-way valve. According to the invention, the bondage of traditional thought is broken through, the switchover of the three-way valve is utilized to realize conveyance of a fluid from a low-pressure condenser to a high-pressure generator, and a circulating pump in traditional circulation is replaced, so as to provide the pump-free jet refrigerating machine; and in addition, the pump-free jet refrigerating machine provided by the invention is utilized to improve different existing jet refrigerating machines.

Description

Without pump ejector type refrigerating machine
Technical field
The invention belongs to refrigeration technology field, especially relate to a kind of without pump ejector type refrigerating machine.
Background technology
Spray type refrigerating technology is a kind of Refrigeration Technique of heat-driven, by vaporizing liquid, freeze, comparing its major advantage with compression-type refrigeration technology is only to need to consume mechanical energy seldom, can directly utilize heat energy as drive energy, have that device structure is simple, volume is little, cost is low, an advantage such as reliable, long service life.
As shown in Figure 6, the spray type refrigerating circulatory system generally comprises generator 13, evaporimeter 18, condenser 15, circulating pump 16, restricting element 17 and injector 14.The cryogenic temperature of conventional spray formula cooling cycle system is higher, and the coefficient of performance of the circulatory system is low, is difficult to meet the demand of high-grade refrigeration.For solving this technical problem, the patent documentation of Granted publication CN100434834C discloses a kind of steam jetting refrigerating circulation system, comprise generator, evaporimeter, condenser, circulating pump, choke valve, main ejector and auxiliary ejector, generator produces high-pressure refrigerant working steam, by main ejector, go injection from evaporimeter low-pressure refrigerant vapor out, circulating pump output high pressure refrigerant liquid, by auxiliary ejector injection from main ejector low-pressure refrigerant vapor out, from its refrigerant liquid out of a diffuser exit, get back to generator, the refrigerant air-liquid mixture that exports out from another enters condenser and condenses, the refrigerant liquid producing divides two-way, after one route circulating pump supercharging, send into auxiliary ejector, separately lead up to after choke valve step-down and enter evaporimeter, cold-producing medium evaporation endothermic in evaporimeter is realized refrigeration.Above-mentioned cooling cycle system has solved the technical problem that how to improve the coefficient of performance of the circulatory system.But said apparatus is difficult to be applied to the recovery of low-grade low-temperature heat source.For solving the problems of the technologies described above, Granted publication has been number for the patent documentation of CN101464070B also discloses a kind of injection type low-temperature refrigerator, and its generator high-pressure outlet is connected with entrance of low boiling working fluid gas ejector and an entrance of higher boiling Working medium gas injector respectively; The outlet of low boiling injector is connected into rectifying component entry through the first regenerator, the second condenser, the second regenerator and first throttle valve; Rectifying parts higher boiling sender property outlet Yi road is connected into liquid ejector entrance, liquid ejector outlet is connected into generator inlet through working medium pump and the first regenerator, another road second choke valve is connected into another entrance of higher boiling injector, and higher boiling injector outlet branch road is connected into another entrance of liquid ejector through the first condenser; The outlet of rectifying parts low boiling working fluid is connected into evaporator inlet through the 3rd choke valve, and evaporator outlet branch road is connected into another entrance of low boiling injector through the second regenerator.Said apparatus can effectively utilize low-grade low-temperature heat source, realizes the Miniature air-cooling of ejector type refrigerating machine, stable, good energy-conserving effect.
But in above-mentioned cooling cycle system, need to utilize pump to the generator of high pressure, to carry liquid from the condenser of low pressure.Pump is unique moving component in conventional spray formula refrigeration system, need to consume mechanical power or electric energy.Due to the introducing of this unique moving component of pump, cause the reliability of ejector refrigeration system to reduce simultaneously, retrained the scope of application of ejector refrigeration system, increased the initial cost of equipment simultaneously.
Pump in the ejector refrigeration system how to replace, makes it utilize heat to drive completely, is subject to scholars' extensive concern.The static pressure of working medium of difference in height generation that the people such as V.M.Nguyen proposes to utilize condenser and generator is the ejector type refrigerating machine to generator feed flow by condenser, and this equipment exists the huge shortcoming of equipment volume.The people such as S.B.Riffat propose to utilize capillarity to the heat pipe type ejector type refrigerating machine of generator feed flow, and this equipment exists to reach the low shortcoming of pressure occurs.Jacek Kasperski proposes to utilize the centripetal force of system rotation generation to the refrigeration system of generator feed flow, and this equipment is because rotation itself needs a large amount of mechanical powers, and feasibility is poor.
Summary of the invention
The present invention proposes a kind of without pump ejector type refrigerating machine, this refrigeration machine only utilizes the switching of a triple valve just can realize from the condenser of low pressure and carries to the fluid of the generator of high pressure, avoid using conveying device pump, reduce the operating cost of refrigeration machine, made this refrigeration machine there is very strong practical value.
A pump ejector type refrigerating machine, comprises generator, the first injector, condenser, restricting element, evaporimeter, triple valve, the first fluid reservoir and the first check valve; Described triple valve comprises port I, port II and tri-ports of port III; Wherein, the height that the height that condenser arranges arranges higher than the first fluid reservoir, the height that the height that the first fluid reservoir arranges arranges higher than generator; The working medium entrance of the first described injector is communicated with the sender property outlet of generator, and driving fluid entrance is communicated with the sender property outlet of evaporimeter, and jet exit is communicated with the working medium entrance of condenser; The working medium entrance of described restricting element is communicated with the sender property outlet of condenser, and sender property outlet is communicated with the working medium entrance of evaporimeter; The port I of described triple valve is communicated with the sender property outlet of condenser, and port II is communicated with the working medium entrance of the first fluid reservoir, and port III is communicated with the sender property outlet of generator; The sender property outlet of described the first fluid reservoir is communicated with the working medium entrance of the first check valve, and the sender property outlet of the first check valve is communicated with the working medium entrance of generator.
The workflow of the working medium in cooling refrigeration machine of the present invention is: first working medium becomes gases at high pressure after being heated by external heat source in generator, the Working medium gas of generator exports enters the first injector as working fluid, and the working medium in evaporimeter reaches condensing pressure after being boosted by injection and enters condenser heat release becomes liquid; The worker quality liquid of condensator outlet is divided into two strands, and wherein one enters evaporator evaporation heat absorption and obtains refrigerating capacity after restricting element, and another strand is connected with triple valve; Liquid level in the first fluid reservoir is lower than when setting value, triple valve is switched to position 1, the pipeline connection between triple valve inner port I and port II now, and condenser is communicated with the first fluid reservoir, generator and the first fluid reservoir are obstructed, and the liquid in condenser is because Action of Gravity Field enters the first fluid reservoir; Liquid level in the first fluid reservoir is higher than when setting value, triple valve is switched to position 2, the pipeline connection between triple valve inner port III and port II now, generator communicates with the first fluid reservoir, condenser and the first fluid reservoir are obstructed, Working medium gas in generator enters the first fluid reservoir by triple valve, makes to reach the high pressure identical with generator in the first fluid reservoir, and in the first fluid reservoir, liquid is because Action of Gravity Field enters generator by the first check valve; Liquid level in the first fluid reservoir is again lower than when setting value, triple valve is got back to position 1, liquid in condenser is because Action of Gravity Field enters the first fluid reservoir, high temperature and high pressure gas in while the first fluid reservoir enters condenser condenses and becomes low pressure liquid, and then flow back in the first fluid reservoir, system completes one action process, enters next operation cycle.
In above-mentioned refrigeration machine, it is enough thick that the pipeline between condenser and triple valve and triple valve and the first fluid reservoir is wanted, thereby guarantee that the gas making progress away in pipeline and the liquid of walking there will not be choking phenomenon downwards.Utilize the switching of triple valve, realized the generator transferring working medium to high pressure by the condenser of low pressure, avoided the mechanical parts such as use liquid pump.
For further reducing the first impact of fluid reservoir mesohigh gas on condensing pressure, reduce the fluctuation of the flow that flows into evaporimeter simultaneously, system can be moved more reposefully, as preferred technical scheme, on pipeline between the port I of the sender property outlet of described condenser and triple valve, the second fluid reservoir is set, wherein the working medium entrance of the second fluid reservoir is communicated with the sender property outlet of condenser, and the sender property outlet of the second fluid reservoir is communicated with the port I of triple valve; The height that the second described fluid reservoir arranges is higher than the height of the first fluid reservoir, so that the liquid of realizing in the second fluid reservoir flows under the influence of gravity in the first fluid reservoir.When triple valve is during in position 1, the second fluid reservoir has reduced by the first impact of fluid reservoir mesohigh gas on condensing pressure; When triple valve is during in position 2, the second fluid reservoir has reduced the fluctuation that flows into the flow of evaporimeter, and system can be moved more reposefully.
For guaranteeing that the liquid of condensation in condenser flow in the first reservoir stably, another kind of preferred technical scheme is: the sender property outlet of described condenser is communicated with the first fluid reservoir sender property outlet by a pipeline, and described pipeline is provided with the second check valve.Now, liquid level in the first fluid reservoir is lower than when setting value, triple valve is switched to position 1, pipeline connection between triple valve inner port I and port II, condenser is communicated with the first fluid reservoir, generator and the first fluid reservoir are obstructed, high temperature and high pressure gas in the first fluid reservoir enters condenser condenses by triple valve becomes low pressure liquid, liquid in condenser can flow in the first fluid reservoir by the second check valve more swimmingly, and because the pressure in generator is larger, so avoid the liquid of condenser condenses to enter into generator by the first check valve.For further reducing the fluctuation of the flow of condensate liquid inflow evaporimeter in condenser, system can be moved more reposefully, further preferred technical scheme is: the pipeline between the sender property outlet of described condenser and the second check valve working medium entrance is provided with the 3rd fluid reservoir, the height that the height that the 3rd fluid reservoir arranges arranges higher than the first fluid reservoir.
For further improving the compression ratio in refrigerator system of the present invention, a kind of preferred scheme is: the pipeline between the jet exit of the first described injector and the working medium entrance of condenser is provided with the second injector; The working medium entrance of the second described injector is communicated with the sender property outlet of generator, and the injection entrance of the second injector is communicated with the jet exit of the first injector, and the jet exit of the second injector is communicated with the working medium entrance of condenser.Adopt two-stage ejector can make system obtain higher compression ratio, can make refrigeration machine move under lower evaporating temperature or higher condensation temperature.
Described restricting element can be selected the restricting element that refrigerating field is conventional, and conventional restricting element is choke valve or capillary.Described choke valve can be selected in manual throttle valve or automatic throttle.
For ease of refrigeration machine of the present invention, realize automatically and controlling, can be chosen in the liquid level sensor that is provided for detecting liquid level in the first fluid reservoir in the first described fluid reservoir; Described triple valve is selected Electrocontrolled tee valve, and Electrocontrolled tee valve receives the signal of telecommunication from liquid level sensor, then according to the signal of telecommunication, its internal path is transformed to control.
The driving heat source capable of choosing multiple thermal source of described generator, such as the thermals source such as waste hot gas, solar energy, geothermal energy or other factory's used heat that can adopt engine to discharge.In addition, of the present inventionly without pump ejector type refrigerating machine, also can be obtained by various existing ejector type refrigerating machine transformations, applicability is strong.
Of the present invention without only adopting the switching of a triple valve in pump ejector type refrigerating machine, realized by the condenser of low pressure and having carried to the fluid of the generator of high pressure, replaced the pump in conventional spray formula refrigeration machine, having realized complete heat drives, and cold-producing medium of the present invention is simple in structure, there is very strong practical value.
Accompanying drawing explanation
Fig. 1 is the system flow chart of a kind of embodiment without pump ejector type refrigerating machine of the present invention.
Fig. 2 is the system flow chart of the second embodiment without pump ejector type refrigerating machine of the present invention.
Fig. 3 is the system flow chart of the third embodiment without pump ejector type refrigerating machine of the present invention.
Fig. 4 is the system flow chart of the 4th kind of embodiment without pump ejector type refrigerating machine of the present invention.
Fig. 5 is the system flow chart of the 5th kind of embodiment without pump ejector type refrigerating machine of the present invention.
Fig. 6 is the system flow chart of conventional spray formula refrigerating plant.
Wherein: 1, generator; 2, the first injector; 3, condenser; 4, restricting element; 5, evaporimeter; 6, triple valve; 7, the first fluid reservoir; 8, check valve; 9, the second fluid reservoir; 10, the second check valve; 11, the 3rd fluid reservoir; 12, the second injector.
The specific embodiment
Referring to the drawings and specific embodiments, the present invention is described in further detail.
Embodiment 1
As shown in Figure 1, a kind of without pump ejector type refrigerating machine, the first injector 2 successively with condenser 3, restricting element 4, evaporimeter 5 loop in series; Triple valve 6 successively with the first fluid reservoir 7, the first check valve 8, generator 1 loop in series; Between generator 1 and the first injector 2, be provided with the pipeline being communicated with; Between condenser 3 and triple valve 6, be provided with the pipeline being communicated with.The height that the height that condenser 3 arranges arranges higher than the first fluid reservoir 7, the height that the height that the first fluid reservoir 7 arranges arranges higher than generator 1.Triple valve 6 comprises port I, port II and tri-ports of port III.
In refrigeration machine in this embodiment, the concrete annexation of each element is:
The working medium entrance of the first injector 2 is communicated with the sender property outlet of generator 1, and the driving fluid entrance of the first injector 2 is communicated with the sender property outlet of evaporimeter 5, and the jet exit of the first injector 2 is communicated with the working medium entrance of condenser; The working medium entrance of restricting element 4 is communicated with the sender property outlet of condenser 3, and the sender property outlet of restricting element 4 is communicated with the working medium entrance of evaporimeter 5; The port I of triple valve 6 is communicated with the sender property outlet of condenser 3, and the port II of triple valve 6 is communicated with the working medium entrance of the first fluid reservoir 7, and the port III of triple valve 6 is communicated with the sender property outlet of generator 1; The sender property outlet of the first fluid reservoir 7 is communicated with the working medium entrance of the first check valve 8, and the sender property outlet of the first check valve 8 is communicated with the working medium entrance of generator 1.
In refrigeration machine in this embodiment, the course of work of cycle fluid is:
Working medium becomes gases at high pressure after being heated by external heat source in generator 1, from the sender property outlet of generator 1 Working medium gas out, as working fluid, enter the first injector 2, the working medium in evaporimeter 5 reaches condensing pressure after being boosted by injection and enters condenser 3 heat release condensations becomes liquid; From the worker quality liquid out of the sender property outlet of condenser 3, be divided into two strands, wherein one enters evaporimeter 5 evaporation endothermics and obtains refrigerating capacitys after restricting element 4, and another strand communicates with triple valve 6; Liquid level in the first fluid reservoir 7 is lower than when setting value, and triple valve 6 is switched to position 1, and condenser 3 communicates with the first fluid reservoir 7, and generator 1 and the first fluid reservoir 7 are obstructed, and the liquid in condenser 3 is because Action of Gravity Field enters the first fluid reservoir 7; Liquid level in the first fluid reservoir 7 is higher than when setting value, triple valve 6 is switched to position 2, generator 1 communicates with the first fluid reservoir 7, condenser 3 and the first fluid reservoir 7 are obstructed, Working medium gas in generator 1 enters the first fluid reservoir 7 by triple valve 6, make to reach the high pressure identical with generator 1 in the first fluid reservoir 7, in the first fluid reservoir 7, liquid is because Action of Gravity Field enters generator 1 by the first check valve 8; Liquid level in the first fluid reservoir 7 is again lower than when setting value, triple valve 6 is got back to position 1, liquid in condenser 3 is because Action of Gravity Field enters the first fluid reservoir 7, high temperature and high pressure gas in the first fluid reservoir 7 enters condenser 3 and is condensed into low pressure liquid simultaneously, it is enough thick that pipeline between condenser 3 and triple valve 6 and triple valve 6 and the first fluid reservoir 7 is wanted, thereby guarantee that the gas making progress away in pipeline and the liquid of walking there will not be choking phenomenon downwards.Utilize the switching of triple valve 6, realized generator 1 transferring working medium to high pressure by the condenser 3 of low pressure.System completes one action process.
In this embodiment, restricting element 4 may be selected to be choke valve or capillary; The first injector 2 is gas-gas blowout emitter; Waste hot gas, solar energy or geothermal energy that the driving heat source of generator 1 can select engine to discharge; Condenser 3 and evaporimeter 5 can be selected common double pipe heat exchanger, plate type heat exchanger, nest plate type heat exchanger or light pipe immersion heat exchanger; Triple valve 6 can be selected manually or electric T-shaped valve; Cycle fluid can be selected the fluid working substances such as water or various cold-producing mediums.
Embodiment 2
As shown in Figure 2, a kind of without pump ejector type refrigerating machine, be with the difference of refrigeration machine structure in embodiment 1, the pipeline between condenser 3 and the port I of triple valve 6 is provided with the second fluid reservoir 9.The height that the height that the second fluid reservoir 9 arranges arranges higher than the first fluid reservoir 7.Concrete annexation is: the working medium entrance of the second fluid reservoir 9 is communicated with the sender property outlet of condenser 3, and the sender property outlet of the second fluid reservoir 9 is communicated with the port I of triple valve 6.All the other connected modes are identical with embodiment 1.
In refrigeration machine in this embodiment, the course of work of cycle fluid is:
Liquid level in the first fluid reservoir 7 is lower than when setting value, triple valve 6 is switched to position 1, the second fluid reservoir 9 communicates with the first fluid reservoir 7, generator 1 and the first fluid reservoir 7 are obstructed, and the part working medium of condenser 3 outlets is because Action of Gravity Field enters the first fluid reservoir 7 through the second fluid reservoir 9, triple valve 6 successively; Liquid level in the first fluid reservoir 7 is higher than when setting value, triple valve 6 is switched to position 2, generator 1 communicates with the first fluid reservoir 7, the second fluid reservoir 9 and the first fluid reservoir 7 are obstructed, the part working medium of condenser 3 outlets stores in the second fluid reservoir 9, Working medium gas in generator 1 enters the first fluid reservoir 7 by triple valve 6, makes to reach the high pressure identical with generator 1 in the first fluid reservoir 7, and in the first fluid reservoir 7, liquid is because Action of Gravity Field enters generator 1 by the first check valve 8; Liquid level in the first fluid reservoir 7 is again lower than when setting value, and triple valve 6 is got back to the liquid that stores in 1, the second fluid reservoir 9 of position because Action of Gravity Field enters the first fluid reservoir 7.System completes one action process.When triple valve 6 is during in position 1, the second fluid reservoir 9 has reduced by the first fluid reservoir 7 impacts of mesohigh gas on condensing pressure, and when triple valve is during in position 2, the second fluid reservoir 9 has reduced the fluctuation that flows into the flow of evaporimeter 5, and system can be moved more reposefully.All the other courses of work are with embodiment 1.
Embodiment 3
As shown in Figure 3, a kind of without pump ejector type refrigerating machine, be with the difference of refrigeration machine structure in embodiment 1, between the sender property outlet of condenser 3 and the first fluid reservoir 7, be in series with the second check valve 10, concrete annexation is: the sender property outlet of condenser 3 is communicated with the working medium entrance of the second check valve 10, and the sender property outlet of the second check valve 10 is communicated with the first fluid reservoir 7 sender property outlets.
In refrigeration machine in this embodiment, the course of work of cycle fluid is:
Liquid level in the first fluid reservoir 7 is lower than when setting value, triple valve 6 is switched to position 1, condenser 3 communicates with the first fluid reservoir 7, generator 1 and the first fluid reservoir 7 are obstructed, high temperature and high pressure gas in the first fluid reservoir 7 enters condenser 3 condensations by triple valve 6 becomes low pressure liquid, thereby make the liquid in condenser 3 by the second check valve 10, to flow into the first fluid reservoir more swimmingly, because the pressure in generator 1 is greater than pressure in the first fluid reservoir 7, shown in liquid in condenser 3 can not flow in generator.All the other courses of work are with embodiment 1.
Embodiment 4
As shown in Figure 4, a kind of without pump ejector type refrigerating machine, be with the difference of refrigeration machine structure in embodiment 3, pipeline between the working medium entrance of the sender property outlet of condenser 3 and the second check valve 10 is provided with the 3rd fluid reservoir 11, and condenser 3 is communicated with logical again with the second check valve 10 after connecting with the 3rd fluid reservoir 11.The height that the height that the 3rd fluid reservoir 11 arranges arranges higher than the first fluid reservoir 7.Concrete annexation is: the working medium entrance of the 3rd fluid reservoir 11 is communicated with the sender property outlet of condenser 3, and the sender property outlet of the 3rd fluid reservoir 11 is communicated with the working medium entrance of the second check valve 10.
In refrigeration machine in this embodiment, the course of work of cycle fluid is:
Liquid level in the first fluid reservoir 7 is higher than when setting value, and triple valve 6 is switched to position 2, and generator 1 communicates with the first fluid reservoir 7, and condenser 3 and the first fluid reservoir 7 are obstructed, and the part working medium that condenser 3 exports stores in the 3rd fluid reservoir 11.The 3rd fluid reservoir 11 has reduced the fluctuation that flows into the flow of evaporimeter 5, and system can be moved more reposefully.All the other courses of work are with embodiment 3.
Embodiment 5
As shown in Figure 5, a kind of without pump ejector type refrigerating machine, be with the difference of refrigeration machine structure in embodiment 1, after first injector 2 series connection the second injectors 12, be connected with condenser 3 again; Between generator 1 and the second injector 12, be provided with pipeline.Concrete annexation is: the working medium entrance of the second injector 12 is communicated with the sender property outlet of generator 1, and the injection entrance of the second injector 12 is communicated with the jet exit of the first injector 2, and the jet exit of the second injector 12 is communicated with the working medium entrance of condenser 3.
In refrigeration machine in this embodiment, the course of work of cycle fluid is:
The Working medium gas of generator 1 outlet enters respectively the first injector 2 and the second injector 12 as working fluid, working medium in evaporimeter 5 reaches intermediate pressure after being boosted by injection in the first injector 2, and the middle pressure working medium of the jet exit of the first injector 2 reaches condensing pressure and enters condenser 3 after being boosted by the second injector 12 injections.Adopt two-stage ejector can make system obtain higher compression ratio, can make refrigeration machine move under lower evaporating temperature or higher condensation temperature.All the other courses of work are with embodiment 1.
Embodiment 6
On the basis of the arbitrary embodiment of embodiment 1-5, in the first fluid reservoir 7, be provided for detecting the liquid level sensor of the first fluid reservoir 7 interior liquid levels, triple valve 6 is Electrocontrolled tee valve in addition, and the signal of telecommunication receiving from liquid level sensor transforms control to its internal path.When the interior liquid level of the first fluid reservoir 7 is lower than setting value, triple valve 6 is switched to position 1, and condenser 3 communicates with the first fluid reservoir 7, and generator 1 and the first fluid reservoir 7 are obstructed; When the interior liquid level of the first fluid reservoir 7 is higher than setting value, triple valve 6 is switched to position 2, and generator 1 communicates with the first fluid reservoir 7, and the second fluid reservoir 9 and the first fluid reservoir 7 are obstructed.Concrete working medium course of work reference example 1-5.
Application examples
Using water as working medium, Fig. 1 shown device of the present invention and conventional spray formula refrigerating plant (as shown in Figure 6) have been carried out respectively to analog computation, the assumed condition of calculating is as follows: (1) system is in steady-working state; (2) ignore the pressure drop of pipeline and heat exchanger and leak heat; (3) total amount of heat of these two strands of thermals source of tail gas and cooling water equates; (4) in evaporimeter, the evaporating temperature of working medium is 5 ℃, and generator occurrence temperature is 200 ℃, and the refrigerating capacity of evaporimeter is 1kW.
Table 1 the present invention and the performance of conventional spray formula refrigeration system under different condensation temperatures
t c/℃ Q 1/kW Q 2/kW W 2/W η
25 1.26 1.251 0.7236 0.8%
26 1.37 1.359 0.7876 0.8%
27 1.487 1.475 0.8563 0.8%
28 1.612 1.599 0.9302 0.8%
29 1.747 1.733 1.01 0.8%
30 1.891 1.877 1.095 0.8%
31 2.047 2.031 1.187 0.8%
32 2.214 2.197 1.286 0.8%
33 2.395 2.376 1.394 0.8%
34 2.589 2.569 1.509 0.8%
35 2.799 2.777 1.635 0.8%
In table 1, tc refers to the condensation temperature of working medium in condenser, and Q1 refers to the needed heat that adds of generator in Fig. 1 shown device; Q 2refer to the needed heat that adds of generator in conventional spray formula refrigeration system; W 2the mechanical power that refers to the required consumption of circulating pump in conventional spray formula refrigeration system, and Fig. 1 shown device does not need to consume mechanical power; η refers to the percentage that adds heat of the extra needs of the relative conventional spray refrigeration system of Fig. 1 shown device.
As can be seen from Table 1, the effect that the present invention is switched by triple valve, only needing increases the input of a small amount of heat to generator, just can realize the generator transferring working medium from the condenser of low pressure to high pressure, thereby replaces the circulating pump of conventional spray formula in circulating.Although circulating pump only needs a small amount of mechanical power input, due to the introducing of this unique moving component of pump, cause the reliability of ejector refrigeration system to reduce, retrained the scope of application of ejector refrigeration system, increased the initial cost of equipment simultaneously.

Claims (7)

1. one kind without pump ejector type refrigerating machine, comprise generator (1), the first injector (2), condenser (3), restricting element (4) and evaporimeter (5), it is characterized in that, also comprise triple valve (6), the first fluid reservoir (7) and the first check valve (8); Described triple valve (6) comprises port I, port II and tri-ports of port III; The height that the height that described condenser (3) arranges arranges higher than the first fluid reservoir (7); The height that the height that described the first fluid reservoir (7) arranges arranges higher than generator (1);
The working medium entrance of described the first injector (2) is communicated with the sender property outlet of generator (1), and driving fluid entrance is communicated with the sender property outlet of evaporimeter (5), and jet exit is communicated with the working medium entrance of condenser (3);
The working medium entrance of described restricting element (4) is communicated with the sender property outlet of condenser (3), and sender property outlet is communicated with the working medium entrance of evaporimeter (5);
The port I of described triple valve (6) is communicated with the sender property outlet of condenser (3), and port II is communicated with the working medium entrance of the first fluid reservoir (7), and port III is communicated with the sender property outlet of generator (1);
The sender property outlet of described the first fluid reservoir (7) is communicated with the working medium entrance of the first check valve (8), and the sender property outlet of the first check valve (8) is communicated with the working medium entrance of generator (1);
In described the first fluid reservoir (7), be provided with the liquid level sensor for detection of the interior liquid level of the first fluid reservoir (7); Described triple valve (6) is Electrocontrolled tee valve, receives from the signal of telecommunication of liquid level sensor and its internal path is transformed to control.
2. according to claim 1ly without pump ejector type refrigerating machine, it is characterized in that, the pipeline between the sender property outlet of described condenser (3) and the port I of triple valve (6) is provided with the second fluid reservoir (9); The height that described the second fluid reservoir (9) arranges is higher than the height of the first fluid reservoir (7).
3. according to claim 1ly without pump ejector type refrigerating machine, it is characterized in that, the sender property outlet of described condenser (3) is communicated with the first fluid reservoir (7) sender property outlet by a pipeline, and described pipeline is provided with the second check valve (10).
4. according to claim 3 without pump ejector type refrigerating machine, it is characterized in that, pipeline between the working medium entrance of the sender property outlet of described condenser (3) and the second check valve (10) is provided with the 3rd fluid reservoir (11), the height that the height that the 3rd fluid reservoir (11) arranges arranges higher than the first fluid reservoir (7).
5. according to claim 1ly without pump ejector type refrigerating machine, it is characterized in that, the pipeline between the jet exit of described the first injector (2) and the working medium entrance of condenser (3) is provided with the second injector (12); The working medium entrance of described the second injector (12) is communicated with the sender property outlet of generator (1), and injection entrance is communicated with the jet exit of the first injector (2), and jet exit is communicated with the working medium entrance of condenser (3).
6. according to claim 1ly without pump ejector type refrigerating machine, it is characterized in that, described restricting element is choke valve or capillary.
According to described in the arbitrary claim of claim 1-6 without pump ejector type refrigerating machine, it is characterized in that, the driving heat source of described generator (1) comprises waste hot gas, solar energy or the geothermal energy that engine is discharged.
CN201210101671.8A 2012-04-09 2012-04-09 Pump-free jet refrigerating machine Active CN102620465B (en)

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