CN102620465A - Pump-free jet refrigerating machine - Google Patents
Pump-free jet refrigerating machine Download PDFInfo
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- CN102620465A CN102620465A CN2012101016718A CN201210101671A CN102620465A CN 102620465 A CN102620465 A CN 102620465A CN 2012101016718 A CN2012101016718 A CN 2012101016718A CN 201210101671 A CN201210101671 A CN 201210101671A CN 102620465 A CN102620465 A CN 102620465A
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- 239000012530 fluid Substances 0.000 claims abstract description 155
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 description 28
- 239000007789 gas Substances 0.000 description 23
- 239000007921 spray Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 11
- 230000005484 gravity Effects 0.000 description 10
- 238000009835 boiling Methods 0.000 description 8
- 230000005494 condensation Effects 0.000 description 7
- 238000009833 condensation Methods 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000009102 absorption Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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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
Technical field
The invention belongs to refrigeration technology field, especially relate to a kind of no pump ejector type refrigerating machine.
Background technology
The spray type refrigerating technology is the Refrigeration Technique that a kind of heat energy drives; Freeze by vaporizing liquid; With its major advantage of compression-type refrigeration compared with techniques is only to need to consume mechanical energy seldom; Can directly utilize heat energy, have that device structure is simple, volume is little, cost is low, an advantage such as reliable, long service life as drive energy.
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 satisfy 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 the high-pressure refrigerant working steam, the low-pressure refrigerant vapor of going injection to come out from evaporimeter by main ejector; Circulating pump output high pressure refrigerant liquid; The low-pressure refrigerant vapor of coming out from main ejector through the auxiliary ejector injection is got back to the generator from the refrigerant liquid that its diffuser exit comes out, and gets into condenser from another refrigerant air-liquid mixture that exports out and condenses; The refrigerant liquid that produces divides two-way; Send into auxiliary ejector after the one route circulating pump supercharging, another road gets into evaporimeter after through the choke valve step-down, and cold-producing medium evaporates heat absorption in evaporimeter realizes 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 an inlet of low boiling working fluid gas ejector and an inlet of higher boiling Working medium gas injector respectively; The outlet of low boiling injector is connected into the rectifying component entry through first regenerator, second condenser, second regenerator and first throttle valve; A road of rectifying parts higher boiling sender property outlet is connected into the liquid ejector inlet; The liquid ejector outlet is connected into generator inlet through the working medium pump and first regenerator; Another road second choke valve is connected into another inlet of higher boiling injector, and higher boiling injector outlet branch road is connected into another inlet of liquid ejector through first condenser; The outlet of rectifying parts low boiling working fluid is connected into evaporator inlet through the 3rd choke valve, and the evaporator outlet branch road is connected into another inlet of low boiling injector through second regenerator.Said apparatus can effectively utilize low-grade low-temperature heat source, realizes small-sized air-cooledization of ejector type refrigerating machine, and is stable, good energy-conserving effect.
But need utilize pump to carry liquid to the generator of high pressure in the above-mentioned cooling cycle system from the condenser of low pressure.Pump is unique moving component in the conventional spray formula refrigeration system, needs to consume mechanical power or electric energy.Because the introducing of this unique moving component of pump causes the reliability of spray type refrigerating system to reduce greatly, retrain the scope of application of spray type refrigerating system simultaneously, increased the initial cost of equipment simultaneously.
How substituted pump in the spray type refrigerating system make it utilize heat to drive fully, receives scholars' extensive concern.People such as V.M.Nguyen propose to utilize the static pressure of working medium of difference in height generation of condenser and generator by the ejector type refrigerating machine of condenser to the generator feed flow, and there is the huge shortcoming of equipment volume in this equipment.People such as S.B.Riffat propose to utilize the heat pipe type ejector type refrigerating machine of capillarity to the generator feed flow, and this equipment exists can reach the low shortcoming of generation pressure.Jacek Kasperski proposes to utilize the refrigeration system of the centripetal force of system's rotation generation to the generator feed flow, and this equipment is because rotation itself needs a large amount of mechanical powers, and feasibility is relatively poor.
Summary of the invention
The present invention proposes a kind of no pump ejector type refrigerating machine; This refrigeration machine only utilizes the switching of a triple valve just can realize carrying to the fluid of the generator of high pressure from the condenser of low pressure; Avoid the use of the transport pump; Reduce the operating cost of cold-producing medium, made this cold-producing medium have very strong practical value.
A kind of no pump ejector type refrigerating machine comprises generator, first injector, condenser, restricting element, evaporimeter, triple valve, first fluid reservoir and first check valve; Described triple valve comprises port I, port II and three ports of port III; Wherein, the height of condenser setting is higher than the height that first fluid reservoir is provided with, and the height of the first fluid reservoir setting is higher than the height that generator is provided with; The Working-fluid intaking of described first injector is communicated with the sender property outlet of generator, and the driving fluid inlet is communicated with the sender property outlet of evaporimeter, and jet exit is communicated with the working medium inlet of condenser; The working medium inlet of described restricting element is communicated with the sender property outlet of condenser, and sender property outlet is communicated with the working medium inlet of evaporimeter; The port I of said triple valve is communicated with the sender property outlet of condenser, and port II is communicated with the working medium inlet of first fluid reservoir, and port III is communicated with the sender property outlet of generator; The sender property outlet of said first fluid reservoir is communicated with the working medium inlet of first check valve, and the sender property outlet of first check valve is communicated with the working medium of generator inlet.
The workflow of the working medium in the cooling refrigeration machine of the present invention is: at first working medium is become gases at high pressure after the external heat source heating in generator; The Working medium gas of generator exports gets into first injector as working fluid, and reaching condensing pressure and get into the condenser heat release after the working medium in the evaporimeter is boosted by injection becomes liquid; The worker quality liquid of condensator outlet is divided into two strands, and wherein one obtains refrigerating capacity through getting into the evaporator evaporation heat absorption behind the restricting element, and another strand links to each other with triple valve; When the liquid level in first fluid reservoir is lower than setting value; Triple valve switches to position 1, the pipeline connection between this moment triple valve inner port I and the port II, and condenser is communicated with first fluid reservoir; The generator and first fluid reservoir are obstructed, and the liquid in the condenser is because the gravity effect gets into first fluid reservoir; When the liquid level in first fluid reservoir is higher than setting value; Triple valve switches to position 2, the pipeline connection between this moment triple valve inner port III and the port II, and generator communicates with first fluid reservoir; The condenser and first fluid reservoir are obstructed; Working medium gas in the generator gets into first fluid reservoir through triple valve, makes to reach the high pressure identical with generator in first fluid reservoir, and liquid in first fluid reservoir is because the gravity effect gets into generator through first check valve; When the liquid level in first fluid reservoir is lower than setting value once more; Triple valve is got back to position 1; Liquid in the condenser is because the gravity effect gets into first fluid reservoir, and the high temperature and high pressure gas entering condenser condenses in first fluid reservoir becomes low pressure liquid simultaneously, and then flow back in first fluid reservoir; System accomplishes the one action process, gets into next operation cycle.
In the above-mentioned refrigeration machine, it is enough thick that the pipeline between condenser and triple valve and triple valve and first fluid reservoir is wanted, thereby guarantee that choking phenomenon appears in gas that makes progress away in the pipeline and the liquid that can not of walking downwards.Utilize the switching of triple valve, realized having avoided mechanical parts such as use liquid pump by the condenser of low pressure generator transferring working medium to high pressure.
For further reducing of the influence of the first fluid reservoir mesohigh gas to condensing pressure; Reduce the fluctuation of the flow of inflow evaporator simultaneously; System can be moved more reposefully,, on the pipeline between the port I of the sender property outlet of described condenser and triple valve second fluid reservoir is set as optimized technical scheme; Wherein the working medium of second fluid reservoir inlet is communicated with the sender property outlet of condenser, and the sender property outlet of second fluid reservoir is communicated with the port I of triple valve; The height of the described second fluid reservoir setting is higher than the height of first fluid reservoir, flows under the influence of gravity in first fluid reservoir so that realize the liquid in second fluid reservoir.When triple valve during in position 1, second fluid reservoir has reduced the influence of the first fluid reservoir mesohigh gas to condensing pressure; When triple valve during in position 2, second fluid reservoir has reduced the fluctuation of the flow of inflow evaporator, and system can be moved more reposefully.
For the liquid that guarantees condensation in the condenser flow in first reservoir stably, another kind of optimized technical scheme is: the sender property outlet of described condenser is communicated with the first fluid reservoir sender property outlet through a pipeline, and said pipeline is provided with second check valve.At this moment; When the liquid level in first fluid reservoir was lower than setting value, triple valve switched to position 1, the pipeline connection between triple valve inner port I and the port II; Condenser is communicated with first fluid reservoir; The generator and first fluid reservoir are obstructed, and the high temperature and high pressure gas in first fluid reservoir gets into condenser condenses through triple valve becomes low pressure liquid, and the liquid in the condenser can flow in first fluid reservoir through second check valve more swimmingly; And because the pressure in the generator is bigger, so avoid the liquid of condenser condenses to enter into generator through first check valve.For further reducing the fluctuation of the flow of condensate liquid inflow evaporimeter in the condenser; System can be moved more reposefully; Further optimized technical scheme is: the pipeline between the sender property outlet of described condenser and the second check valve working medium inlet is provided with the 3rd fluid reservoir, and the height of the 3rd fluid reservoir setting is higher than the height that first fluid reservoir is provided with.
For further improving the compression ratio in the refrigerator system of the present invention, a kind of preferred scheme is: the pipeline between the jet exit of described first injector and the working medium of the condenser inlet is provided with second injector; The Working-fluid intaking of described second injector is communicated with the sender property outlet of generator, and the injection inlet of second injector is communicated with the jet exit of first injector, and the jet exit of second injector is communicated with the working medium of condenser inlet.Adopt two-stage ejector can make system obtain higher compression ratio, refrigeration machine is moved under lower evaporating temperature or higher condensation temperature.
Described restricting element can be selected refrigerating field restricting element commonly used for use, and restricting element commonly used is choke valve or capillary.Described choke valve can be selected in manual throttle valve or automatic throttle.
Realize control automatically for ease of refrigeration machine of the present invention, can be chosen in the liquid level sensor that is provided for detecting liquid level in first fluid reservoir in described first fluid reservoir; Described triple valve is selected automatically controlled triple valve, and automatically controlled triple valve receives the signal of telecommunication from liquid level sensor, according to the signal of telecommunication its internal path is transformed control then.
The optional majority kind of the driving heat source of described generator thermal source, the thermals source such as waste hot gas, solar energy, geothermal energy or other factory's used heat that for example can adopt engine to discharge.In addition, no pump ejector type refrigerating machine of the present invention also can be obtained by various existing ejector type refrigerating machine transformations, and applicability is strong.
Only adopt the switching of a triple valve in the no pump ejector type refrigerating machine of the present invention; Realized carrying to the fluid of the generator of high pressure by the condenser of low pressure; Replaced the pump in the conventional spray formula refrigeration machine; Realized that complete heat drives, and cold-producing medium of the present invention is simple in structure, has very strong practical value.
Description of drawings
Fig. 1 is the system flow chart of a kind of embodiment of no pump ejector type refrigerating machine of the present invention.
Fig. 2 is the system flow chart of second kind of embodiment of no pump ejector type refrigerating machine of the present invention.
Fig. 3 is the system flow chart of the third embodiment of no pump ejector type refrigerating machine of the present invention.
Fig. 4 is the system flow chart of the 4th kind of embodiment of no pump ejector type refrigerating machine of the present invention.
Fig. 5 is the system flow chart of the 5th kind of embodiment of no 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, first injector; 3, condenser; 4, restricting element; 5, evaporimeter; 6, triple valve; 7, first fluid reservoir; 8, check valve; 9, second fluid reservoir; 10, second check valve; 11, the 3rd fluid reservoir; 12, second injector.
The specific embodiment
Followingly the present invention is described in further detail with reference to accompanying drawing and specific embodiment.
Embodiment 1
As shown in Figure 1, a kind of no pump ejector type refrigerating machine, first injector 2 are connected with condenser 3, restricting element 4, evaporimeter 5 successively and are constituted the loop; Triple valve 6 is connected and is constituted the loop with first fluid reservoir 7, first check valve 8, generator 1 successively; Be provided with the pipeline that is communicated with between generator 1 and first injector 2; Be provided with the pipeline that is communicated with between condenser 3 and the triple valve 6.The height that condenser 3 is provided with is higher than the height that first fluid reservoir 7 is provided with, and the height that first fluid reservoir 7 is provided with is higher than the height that generator 1 is provided with.Triple valve 6 comprises port I, port II and three ports of port III.
The concrete annexation of each element is in the refrigeration machine among this embodiment:
The Working-fluid intaking of first injector 2 is communicated with the sender property outlet of generator 1, and the driving fluid inlet of first injector 2 is communicated with the sender property outlet of evaporimeter 5, and the jet exit of first injector 2 is communicated with the working medium of condenser inlet; The working medium inlet 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 inlet 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 inlet of 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 first fluid reservoir 7 is communicated with the working medium inlet of first check valve 8, and the sender property outlet of first check valve 8 is communicated with the working medium inlet of generator 1.
The course of work of cycle fluid is in the refrigeration machine among this embodiment:
Working medium is become gases at high pressure after the external heat source heating in generator 1; The Working medium gas that comes out from the sender property outlet of generator 1 gets into first injector 2 as working fluid, and reaching condensing pressure after the working medium in the evaporimeter 5 is boosted by injection and getting into condenser 3 heat release condensations becomes liquid; Be divided into two strands from the worker quality liquid that comes out of the sender property outlet of condenser 3, wherein one gets into evaporimeters 5 evaporation heat absorptions through restricting element 4 backs and obtains refrigerating capacitys, and another strand communicates with triple valve 6; When the liquid level in first fluid reservoir 7 was lower than setting value, triple valve 6 switched to position 1, and condenser 3 communicates with first fluid reservoir 7, and the generator 1 and first fluid reservoir 7 are obstructed, and the liquid in the condenser 3 is because the gravity effect gets into first fluid reservoir 7; When the liquid level in first fluid reservoir 7 is higher than setting value; Triple valve 6 switches to position 2; Generator 1 communicates with first fluid reservoir 7, and the condenser 3 and first fluid reservoir 7 are obstructed, and the Working medium gas in the generator 1 gets into first fluid reservoir 7 through triple valve 6; Make the high pressure that reaches identical with generator 1 in first fluid reservoir 7, liquid in first fluid reservoir 7 is because the gravity effect gets into generators 1 through first check valve 8; When the liquid level in first fluid reservoir 7 is lower than setting value once more; Triple valve 6 is got back to position 1; Liquid in the condenser 3 is because the gravity effect gets into first fluid reservoir 7; High temperature and high pressure gas in first fluid reservoir 7 gets into condenser 3 and is condensed into low pressure liquid simultaneously, and it is enough thick that the pipeline between condenser 3 and triple valve 6 and triple valve 6 and first fluid reservoir 7 is wanted, thereby guarantees that choking phenomenon appears in gas that makes progress away in the pipeline and the liquid that can not of walking downwards.Utilize the switching of triple valve 6, realized by the condenser 3 of low pressure generator 1 transferring working medium to high pressure.System accomplishes the one action process.
In this embodiment, restricting element 4 may be selected to be choke valve or capillary; First injector 2 is gas-gas blowout love dart; Waste hot gas, solar energy or geothermal energy that the driving heat source of generator 1 can select engine to discharge; Condenser 3 can be selected common double pipe heat exchanger, plate type heat exchanger, nest plate type heat exchanger or light pipe immersion heat exchanger with evaporimeter 5; Triple valve 6 can be selected manually or electric T-shaped valve; Cycle fluid can be selected fluid working substances such as water or various cold-producing mediums.
Embodiment 2
As shown in Figure 2, a kind of no pump ejector type refrigerating machine is that with the difference of refrigeration machine structure among the embodiment 1 pipeline between the port I of condenser 3 and triple valve 6 is provided with second fluid reservoir 9.The height that second fluid reservoir 9 is provided with is higher than the height that first fluid reservoir 7 is provided with.Concrete annexation is: the working medium inlet of second fluid reservoir 9 is communicated with the sender property outlet of condenser 3, and the sender property outlet of second fluid reservoir 9 is communicated with the port I of triple valve 6.All the other connected modes are identical with embodiment 1.
The course of work of cycle fluid is in the refrigeration machine among this embodiment:
When the liquid level in first fluid reservoir 7 is lower than setting value; Triple valve 6 switches to position 1; Second fluid reservoir 9 communicates with first fluid reservoir 7; The generator 1 and first fluid reservoir 7 are obstructed, and the part working medium of condenser 3 outlet is because the gravity effect gets into first fluid reservoir 7 through second fluid reservoir 9, triple valve 6 successively; When the liquid level in first fluid reservoir 7 is higher than setting value; Triple valve 6 switches to position 2, and generator 1 communicates with first fluid reservoir 7, and second fluid reservoir 9 and first fluid reservoir 7 are obstructed; The part working medium of condenser 3 outlets stores in second fluid reservoir 9; Working medium gas in the generator 1 gets into first fluid reservoir 7 through triple valve 6, makes the high pressure that reaches identical with generator 1 in first fluid reservoir 7, and liquid in first fluid reservoir 7 is because the gravity effect gets into generators 1 through first check valve 8; When the liquid level in first fluid reservoir 7 was lower than setting value once more, the liquid that stores in 1, the second fluid reservoir 9 of position got back to by triple valve 6 because the gravity effect gets into first fluid reservoir 7.System accomplishes the one action process.When triple valve 6 during in position 1, second fluid reservoir 9 has reduced the influence of first fluid reservoir, 7 mesohigh gases to condensing pressure, and when triple valve during in position 2, second fluid reservoir 9 has reduced the fluctuation of the flow of inflow evaporator 5, and system can be moved more reposefully.All the other courses of work are with embodiment 1.
As shown in Figure 3; A kind of no pump ejector type refrigerating machine; Be with the difference of refrigeration machine structure among the embodiment 1; Be in series with second check valve 10 between the sender property outlet of condenser 3 and first fluid reservoir 7, concrete annexation is: the sender property outlet of condenser 3 is communicated with the working medium inlet of second check valve 10, and the sender property outlet of second check valve 10 is communicated with first fluid reservoir, 7 sender property outlets.
The course of work of cycle fluid is in the refrigeration machine among this embodiment:
When the liquid level in first fluid reservoir 7 is lower than setting value; Triple valve 6 switches to position 1; Condenser 3 communicates with first fluid reservoir 7; The generator 1 and first fluid reservoir 7 are obstructed, and the high temperature and high pressure gas in first fluid reservoir 7 gets into condenser 3 condensations through triple valve 6 becomes low pressure liquid, thereby make the liquid in the condenser 3 to flow into first fluid reservoir through second check valve 10 more swimmingly; Because the pressure in the generator 1 is greater than pressure in first fluid reservoir 7, shown in liquid that can not in the condenser 3 flow in the generator.All the other courses of work are with embodiment 1.
Embodiment 4
As shown in Figure 4; A kind of no pump ejector type refrigerating machine; Be with the difference of refrigeration machine structure among the embodiment 3; Pipeline between the working medium of the sender property outlet of condenser 3 and second check valve 10 inlet is provided with the 3rd fluid reservoir 11, and condenser 3 leads to being communicated with second check valve 10 after the 3rd fluid reservoir 11 is connected again.The height that the 3rd fluid reservoir 11 is provided with is higher than the height that first fluid reservoir 7 is provided with.Concrete annexation is: the working medium inlet 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 inlet of second check valve 10.
The course of work of cycle fluid is in the refrigeration machine among this embodiment:
When the liquid level in first fluid reservoir 7 was higher than setting value, triple valve 6 switched to position 2, and generator 1 communicates with first fluid reservoir 7, and the condenser 3 and first fluid reservoir 7 are obstructed, and the part working medium of condenser 3 outlets stores in the 3rd fluid reservoir 11.The 3rd fluid reservoir 11 has reduced the fluctuation of the flow of inflow evaporator 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 no pump ejector type refrigerating machine is with the difference of refrigeration machine structure among the embodiment 1, is connected with condenser 3 behind first injector, 2 series connection, second injector 12 again; Be provided with pipeline between the generator 1 and second injector 12.Concrete annexation is: the Working-fluid intaking of second injector 12 is communicated with the sender property outlet of generator 1; The injection inlet of second injector 12 is communicated with the jet exit of first injector 2, and the jet exit of second injector 12 is communicated with the working medium inlet of condenser 3.
The course of work of cycle fluid is in the refrigeration machine among this embodiment:
The Working medium gas of generator 1 outlet gets into first injector 2 and second injector 12 respectively as working fluid; Working medium in the evaporimeter 5 reaches intermediate pressure after in first injector 2, being boosted by injection, and the middle pressure working medium of the jet exit of first injector 2 reaches condensing pressure and gets into condenser 3 after being boosted by second injector, 12 injections.Adopt two-stage ejector can make system obtain higher compression ratio, refrigeration machine is moved under lower evaporating temperature or higher condensation temperature.All the other courses of work are with embodiment 1.
On the basis of the arbitrary embodiment of embodiment 1-5; In first fluid reservoir 7, be provided for detecting the liquid level sensor of liquid level in first fluid reservoir 7; Triple valve 6 is automatically controlled triple valve in addition, and the signal of telecommunication that receives from liquid level sensor transforms control to its internal path.Liquid level is lower than setting value in first fluid reservoir 7, and triple valve 6 switches to position 1, and condenser 3 communicates with first fluid reservoir 7, and the generator 1 and first fluid reservoir 7 are obstructed; Liquid level is higher than setting value in first fluid reservoir 7, and triple valve 6 switches to position 2, and generator 1 communicates with first fluid reservoir 7, and second fluid reservoir 9 and first fluid reservoir 7 are obstructed.Concrete working medium course of work reference implementation example 1-5.
Application examples
As working medium, the present invention's device shown in Figure 1 and conventional spray formula refrigerating plant (as shown in Figure 6) have been carried out analog computation respectively with water, the assumed condition of calculating is following: (1) system is in steady-working state; (2) pressure drop of ignoring pipeline and heat exchanger with leak heat; (3) total amount of heat of these two strands of thermals source of tail gas and cooling water equates; (4) evaporating temperature of working medium is 5 ℃ in the evaporimeter, and the 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％ |
Tc refers to the condensation temperature of working medium in the condenser in the table 1, and Q1 refers to the needed heat that adds of generator in the device shown in Figure 1; Q
2Refer to the needed heat that adds of generator in the conventional spray formula refrigeration system; W
2The mechanical power that refers to the required consumption of circulating pump in the conventional spray formula refrigeration system, and device shown in Figure 1 need not consume mechanical power; η refers to the percentage that adds heat of the extra needs of the relative conventional spray refrigeration system of device shown in Figure 1.
Can find out from table 1, the effect that the present invention is switched through triple valve, only needing increase a spot of heat input to generator, just can realize from the condenser of the low pressure generator transferring working medium to high pressure, thereby replace the circulating pump of conventional spray formula in circulating.Though circulating pump only needs a spot of mechanical power input, because the introducing of this unique moving component of pump causes the reliability of spray type refrigerating system to reduce greatly, has retrained the scope of application of spray type refrigerating system, has increased the initial cost of equipment simultaneously.
Claims (8)
1. a no pump ejector type refrigerating machine comprises generator (1), first injector (2), condenser (3), restricting element (4) and evaporimeter (5), it is characterized in that, also comprises triple valve (6), first fluid reservoir (7) and first check valve (8); Described triple valve (6) comprises port I, port II and three ports of port III; The height that described condenser (3) is provided with is higher than the height that first fluid reservoir (7) is provided with; The height that described first fluid reservoir (7) is provided with is higher than the height that generator (1) is provided with;
The Working-fluid intaking of described first injector (2) is communicated with the sender property outlet of generator (1), and the driving fluid inlet is communicated with the sender property outlet of evaporimeter (5), and jet exit is communicated with the working medium inlet of condenser (3);
The working medium inlet 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 inlet of evaporimeter (5);
The port I of said triple valve (6) is communicated with the sender property outlet of condenser (3), and port II is communicated with the working medium inlet of first fluid reservoir (7), and port III is communicated with the sender property outlet of generator (1);
The sender property outlet of said first fluid reservoir (7) is communicated with the working medium inlet of first check valve (8), and the sender property outlet of first check valve (8) is communicated with the working medium inlet of generator (1).
2. no pump ejector type refrigerating machine according to claim 1 is characterized in that, the pipeline between the port I of the sender property outlet of described condenser (3) and triple valve (6) is provided with second fluid reservoir (9); The height that described second fluid reservoir (9) is provided with is higher than the height of first fluid reservoir (7).
3. no pump ejector type refrigerating machine according to claim 1 is characterized in that, the sender property outlet of described condenser (3) is communicated with first fluid reservoir (7) sender property outlet through a pipeline, and said pipeline is provided with second check valve (10).
4. no pump ejector type refrigerating machine according to claim 3; It is characterized in that; Pipeline between the working medium inlet of the sender property outlet of described condenser (3) and second check valve (10) is provided with the 3rd fluid reservoir (11), and the height that the 3rd fluid reservoir (11) is provided with is higher than the height that first fluid reservoir (7) is provided with.
5. no pump ejector type refrigerating machine according to claim 1 is characterized in that, the pipeline between the working medium inlet of the jet exit of described first injector (2) and condenser (3) is provided with second injector (12); The Working-fluid intaking of described second injector (12) is communicated with the sender property outlet of generator (1), and the injection inlet is communicated with the jet exit of first injector (2), and jet exit is communicated with the working medium inlet of condenser (3).
6. no pump ejector type refrigerating machine according to claim 1 is characterized in that described restricting element is choke valve or capillary.
7. according to the described no pump ejector type refrigerating machine of the arbitrary claim of claim 1-6, it is characterized in that, be provided with the liquid level sensor that is used to detect the interior liquid level of first fluid reservoir (7) in described first fluid reservoir (7); Described triple valve (6) is automatically controlled triple valve, receives and transforms control from the signal of telecommunication of liquid level sensor and to its internal path.
8. according to the described no pump ejector type refrigerating machine of the arbitrary claim of claim 1-6, 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.
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| CN104132486A (en) * | 2014-07-11 | 2014-11-05 | 浙江大学 | Pump-free type thermal spray refrigerating cycle method and device |
| CN104654687A (en) * | 2015-01-04 | 2015-05-27 | 浙江大学 | Control method of circulating pump-free type steam pressurized ejector refrigeration system |
| CN104654687B (en) * | 2015-01-04 | 2017-01-11 | 浙江大学 | Control method of circulating pump-free type steam pressurized ejector refrigeration system |
| CN105491856A (en) * | 2015-12-31 | 2016-04-13 | 中国电子科技集团公司第三十八研究所 | Combined cooling and power supply device and combined cooling and power supply method for electronic device |
| CN107062684A (en) * | 2017-05-27 | 2017-08-18 | 山东大学 | One kind is without pump ejector refrigeration system and refrigerating method |
| CN107062684B (en) * | 2017-05-27 | 2019-10-29 | 山东大学 | It is a kind of without pump ejector refrigeration system and refrigerating method |
| CN107726045A (en) * | 2017-09-29 | 2018-02-23 | 深圳市燃气集团股份有限公司 | A kind of BOG liquefaction recycling systems of liquefied natural gas |
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| CN107906750B (en) * | 2017-11-10 | 2019-08-27 | 大连海事大学 | A kind of energy-efficient cold, hot and warm drinking-water machine |
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