CN110579034A - Two-stage multi-cylinder free piston compressed air refrigerating system - Google Patents
Two-stage multi-cylinder free piston compressed air refrigerating system Download PDFInfo
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- CN110579034A CN110579034A CN201910896962.2A CN201910896962A CN110579034A CN 110579034 A CN110579034 A CN 110579034A CN 201910896962 A CN201910896962 A CN 201910896962A CN 110579034 A CN110579034 A CN 110579034A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B25/00—Multi-stage pumps
- F04B25/005—Multi-stage pumps with two cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/004—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being air
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compressor (AREA)
Abstract
The invention relates to a double-stage multi-cylinder free piston compressed air refrigerating system, and belongs to the field of energy power. The free piston linear motor is a novel energy conversion device formed by coupling a free piston compressor and a linear motor, and the linear motor compresses air in a cylinder through reciprocating motion; the whole system adopts two-stage compression to provide refrigeration for users, and meanwhile, the liquid air storage tank is adopted, so that the liquid air can be stored in the low ebb of electricity utilization at night. The invention has simple structure and easy operation. Compared with a single-cylinder compressor, the double-cylinder compressor can improve the utilization rate of energy, and meanwhile, the double-cylinder compressor is compact in structure, small in occupied space and remarkable in advantages. Compared with the conventional one-stage compression, the mechanical work is saved, and the efficiency is higher. Meanwhile, the air is selected as the working medium, so that the air is stable in property, easy to obtain, low in cost, environment-friendly, pollution-free and capable of being used repeatedly.
Description
Technical Field
the invention relates to a double-stage multi-cylinder free piston compressed air refrigerating system, and belongs to the field of energy power.
background
nowadays, refrigeration technology has been widely used in daily life, and also plays an important role in advanced scientific fields such as microelectronics, optical fiber communication, energy, novel raw materials, space development, and bioengineering. At present, the conventional refrigerating equipment on the market generally adopts a single-cylinder compressor for one-stage compression, and the energy utilization efficiency is relatively low. The refrigerant generally adopts R22, R32 and novel CO2A refrigerant, and the like. R22 has large refrigerating capacity, but R22 contains fluorine and chlorine, damages the ozone layer and causes greenhouse effect; r32 is non-toxic and environment-friendly, but is high in cost and flammable; CO 22Although the refrigerating working medium is non-toxic, non-flammable and low in viscosity, the critical pressure is high and is about 7.38MPa, and the requirement on equipment is high.
disclosure of Invention
In order to solve the technical problem, the invention provides a two-stage multi-cylinder free piston compressed air refrigerating system, a free piston linear motor is a novel energy conversion device formed by coupling a free piston compressor and a linear motor, and the linear motor compresses air in a cylinder through reciprocating motion; the whole system adopts two-stage compression, and simultaneously, adopts the liquid air storage tank, can utilize the night to use the power consumption valley to store liquid air.
The specific technical scheme is as follows:
A double-stage multi-cylinder free piston compressed air refrigerating system. As shown in fig. 1, the method mainly includes: the system comprises a free piston compressed air module, a liquid air refrigeration module and a control module.
The free piston compressed air module mainly comprises: the dehumidifier is characterized by comprising a dehumidifier (1), a linear motor a (2), a cylinder a (3), a cylinder b (4), a piston a (5), a piston b (6), a connecting rod a (7), a connecting rod b (8), a cooler a (9), a cooler b (10), a linear motor b (11), a cylinder c (12), a cylinder d (13), a piston c (14), a piston d (15), a connecting rod c (16), a connecting rod d (17), a pipeline a (46), a pipeline b (47), a pipeline c (48), a pipeline d (49), a pipeline e (50), a pipeline f (51), a pipeline g (52) and a pipeline h (53); the linear motor a (2) is fixedly connected with the piston a (5) through a connecting rod a (7); the linear motor a (2) is fixedly connected with the piston b (6) through a connecting rod b (8); the piston a (5) is arranged in the cylinder a (3), and the piston b (6) is arranged in the cylinder b (4); the linear motor b (11) is fixedly connected with the piston c (14) through a connecting rod c (16); the linear motor b (11) is fixedly connected with the piston d (15) through a connecting rod d (17); the piston c (14) is in the cylinder c (12), and the piston d (15) is in the cylinder d (13); the dehumidifier (1) is connected with the cylinder a (3) through a pipeline a (46), and the dehumidifier (1) is connected with the cylinder b (4) through a pipeline b (47); the cylinder a (3) is connected with a cooler a (9) through a pipeline c (48), and the cooler a (9) is connected with the cylinder c (12) through a pipeline e (50); the cylinder b (4) is connected with a cooler b (10) through a pipeline d (49), and the cooler b (10) is connected with a cylinder d (13) through a pipeline f (51); the cylinder c (12) is connected to the liquid air tank (19) via a pipe g (52), and the cylinder d (13) is connected to the liquid air tank (19) via a pipe h (53).
The liquid air refrigeration module mainly comprises: a liquid air tank (19), a user (20), a conduit i (54); wherein the liquid air tank (19) is connected to the user (20) via a line i (54).
the control module mainly comprises: a controller (18), a temperature sensor a (21), a temperature sensor b (22), a temperature sensor c (25), a temperature sensor d (26), a temperature sensor e (30), a pressure sensor a (23), a pressure sensor b (24), a pressure sensor c (27), a pressure sensor d (28), a pressure sensor e (29), a valve a (31), a valve b (32), a valve c (33), a valve d (34), a valve e (35), a valve f (36), a valve g (37), a valve h (38), a valve i (39), a valve j (40), a valve k (41), a valve l (42), a valve m (43), a valve n (44) and a valve o (45); wherein the temperature sensor a (21) is fixed on the cylinder a (3) and is connected with the controller (18) through a control line; the temperature sensor b (22) is fixed on the cylinder b (4) and is connected with the controller (18) through a control line; the temperature sensor c (25) is fixed on the cylinder c (12) and is connected with the controller (18) through a control line; the temperature sensor d (26) is fixed on the cylinder d (13) and is connected with the controller (18) through a control line; the temperature sensor e (30) is fixed on a user (20) and is connected with the controller (18) through a control line; the pressure sensor a (23) is fixed on the cylinder a (3) and is connected with the controller (18) through a control line; the pressure sensor b (24) is fixed on the cylinder b (4) and is connected with the controller (18) through a control line; the pressure sensor c (27) is fixed on the cylinder c (12) and is connected with the controller (18) through a control line; the pressure sensor d (28) is fixed on the cylinder d (13) and is connected with the controller (18) through a control line; the pressure sensor e (29) is fixed on the liquid air tank (29) and is connected with the controller (18) through a control line.
The valve a (31) is fixed on the pipeline a (46) and is connected with the controller (18) through a control line; the valve b (32) is fixed on the pipeline b (47) and is connected with the controller (18) through a control line; the valve c (33) is fixed on one side of the pipeline c (48) close to the cylinder a (3) and is connected with the controller (18) through a control line; the valve d (34) is fixed on one side of the pipeline d (49) close to the cylinder b (4) and is connected with the controller (18) through a control line; the valve e (35) is fixed on the pipeline c (48) close to one side of the cooler a (9) and is connected with the controller (18) through a control line, and the valve f (36) is fixed on the pipeline d (49) close to one side of the cooler b (10) and is connected with the controller (18) through a control line; the valve g (37) is fixed on the pipeline e (50) close to one side of the cooler a (9) and is connected with the controller (18) through a control line; the valve h (38) is fixed on one side of the pipeline f (51) close to the cooler b (10) and is connected with the controller (18) through a control line; the valve i (39) is fixed on one side of the pipeline e (50) close to the cylinder c (12) and is connected with the controller (18) through a control line; the valve j (40) is fixed on one side of the pipeline f (51) close to the cylinder d (13) and is connected with the controller (18) through a control line; the valve k (41) is fixed on one side of the pipeline g (52) close to the cylinder c (12) and is connected with the controller (18) through a control line; the valve l (42) is fixed on one side of the pipeline h (53) close to the cylinder d (13) and is connected with the controller (18) through a control line; the valve m (43) is fixed on the pipeline g (52) close to one side of the liquid air tank (19) and is connected with the controller (18) through a control line; the valve n (44) is fixed on one side of the pipeline h (53) close to the liquid air tank (19) and is connected with the controller (18) through a control line; the valve o (45) is fixed on the pipeline i (54) and is connected with the controller (18) through a control line.
A double-stage multi-cylinder free piston compressed air refrigerating system has the following requirements on all parts of the equipment: the dehumidifier (1) is used for removing moisture in the air; the cylinder c (12), the cylinder d (13), the piston c (14) and the piston d (15) are made of low-temperature resistant materials; the pipeline c (48) and the pipeline d (49) adopt high-pressure-resistant pipelines; the pipeline e (50) and the pipeline f (51) adopt high-pressure resistant pipelines; the pipeline g (52) and the pipeline h (53) adopt low-temperature and low-pressure resistant pipelines; the valve c (33), the valve d (34), the valve e (35) and the valve f (36) adopt high-pressure-resistant valves; the valve g (37), the valve h (38), the valve i (39), the valve j (40), the valve k (41), the valve l (42), the valve m (43), the valve n (44) and the valve o (45) adopt low-temperature and high-pressure resistant valves.
the working principle of the double-stage multi-cylinder free piston compressed air refrigerating system is as follows: when a linear motor a (2) drives a connecting rod a (7) and a connecting rod b (8) to move rightwards, a valve a (31) is opened, air enters an air cylinder a (3) through the valve a (31), a valve b (32), a valve c (33) and a valve d (34) are closed, when a pressure sensor b (24) displays that the pressure reaches 1.88MPa, the valve d (34) and a valve f (36) are opened, the temperature of the compressed air in the air cylinder b (4) is reduced to normal temperature through a cooler b (10), a valve h (38) and a valve j (40) are opened, the high-pressure air at the normal temperature enters an air cylinder d (13) through a pipeline f (51), when all the compressed air enters the air cylinder d (13), the linear motor b (11) drives the connecting rod c (16) and the connecting rod d (17) to move rightwards, the valve j (40) and the valve l (42) are closed, and when a pressure gauge d (28) displays that the pressure reaches 3.5MPa, the valve l (42) and the valve n (44) are opened, and the liquid air flows into the liquid air tank (19) through the pipeline h (53); at the moment, the linear motor a (2) drives the connecting rod a (7) and the connecting rod b (8) to move leftwards, the valve b (32) is opened, the valve a (31), the valve c (33) and the valve d (34) are closed, when the pressure sensor a (23) displays that the pressure reaches 1.88MPa, the valve c (33) and the valve e (35) are opened, the compressed air in the cylinder a (3) is cooled to the normal temperature through the cooler a (9), the valve g (37) and the valve i (39) are opened, when all the compressed air enters the cylinder c (12), the linear motor b (11) drives the connecting rod c (16) and the connecting rod d (17) to move leftwards, the valve i (39) and the valve k (41) are closed, when the pressure gauge c (27) displays that the pressure reaches 3.5MPa, the valve k (41), the valve m (43) is opened, the valve l (42) and the valve n (44) are closed, liquid air flows into the liquid air tank (19) through a pipe g (52); so as to reciprocate and store liquid air, when the resident needs refrigeration, the temperature sensor e (30) transmits a signal to the controller, the controller opens the valve o (45), and the liquid air provides refrigeration for the user through the pipeline i (54).
Compared with the prior art, the invention has the following advantages:
1. The free piston linear motor is a novel energy conversion device formed by coupling a free piston compressor and the linear motor, the linear motor compresses air in a cylinder through reciprocating motion, and the free piston linear motor is simple in structure and easy to operate. Compared with a single-cylinder compressor, the double-cylinder compressor can improve the utilization rate of energy, and meanwhile, the double-cylinder compressor is compact in structure, small in occupied space and remarkable in advantages.
2. The whole system adopts two-stage compression, saves mechanical work compared with the conventional one-stage compression and has higher efficiency. Meanwhile, the liquid air storage tank is adopted, so that the liquid air can be stored in the night power utilization valley, the phenomenon of uneven power utilization day and night is relieved, and electric energy is fully utilized.
3. The invention adopts air as refrigerating working medium, the air is compressed to 3.5MPa at normal temperature to obtain liquid air, and the liquid air is obtained according to the formula P ═ P (P ═ P)1P2)0.5The intermediate pressure is 1.88MPa, so that the air is compressed in two stages by the free piston compressor, and the air is cooled to normal temperature by the cooler after being compressed in one stage and then compressed in a second stage, so that the consumed work of the air compressor is less, and meanwhile, the compressed air can be used for preparing liquid air in the valley of power consumption at night, and the utilization rate of electric energy is improved. Therefore, the air is selected as the working medium, has stable property, is easy to obtain, has low cost, is environment-friendly and pollution-free, and can be repeatedly used.
Drawings
FIG. 1 is a cross-sectional view of a dual stage multi-cylinder free piston compressed air refrigeration system;
Wherein, 1-dehumidifier, 2-linear motor a, 3-cylinder a, 4-cylinder b, 5-piston a, 6-piston b, 7-connecting rod a, 8-connecting rod b, 9-cooler a, 10-cooler b, 11-linear motor b, 12-cylinder c, 13-cylinder d, 14-piston c, 15-piston d, 16-connecting rod c, 17-connecting rod d, 18-controller, 19-liquid air tank, 20-user, 21-temperature sensor a, 22-temperature sensor b, 23-pressure sensor a, 24-pressure sensor b, 25-temperature sensor c, 26-temperature sensor d, 27-pressure sensor c, 28-pressure sensor d, 29-pressure sensor e, 30-temperature sensor e, 31-valve a, 32-valve b, 33-valve c, 34-valve d, 35-valve e, 36-valve f, 37-valve g, 38-valve h, 39-valve i, 40-valve j, 41-valve k, 42-valve l, 43-valve m, 44-valve n, 45-valve o, 46-pipeline a, 47-pipeline b, 48-pipeline c, 49-pipeline d, 50-pipeline e, 51-pipeline f, 52-pipeline g, 53-pipeline h, 54-pipeline i
detailed description of the preferred embodiments
The present application is further described with reference to the accompanying drawings.
A double-stage multi-cylinder free piston compressed air refrigerating system. As shown in fig. 1, the method mainly includes: the system comprises a free piston compressed air module, a liquid air refrigeration module and a control module.
As shown in fig. 1, the free piston compressed air module mainly includes: the dehumidifier comprises a dehumidifier 1, a linear motor a2, a cylinder a3, a cylinder b4, a piston a5, a piston b6, a connecting rod a7, a connecting rod b8, a cooler a9, a cooler b10, a linear motor b11, a cylinder c12, a cylinder d13, a piston c14, a piston d15, a connecting rod c16, a connecting rod d17, a pipeline a46, a pipeline b47, a pipeline c48, a pipeline d49, a pipeline e50, a pipeline f51, a pipeline g52 and a pipeline h 53; the linear motor a2 is fixedly connected with the piston a5 through a connecting rod a 7; the linear motor a2 is fixedly connected with the piston b6 through a connecting rod b 8; piston a5 is in cylinder a3, piston b6 is in cylinder b 4; the linear motor b11 is fixedly connected with the piston c14 through a connecting rod c 16; the linear motor b11 is fixedly connected with the piston d15 through a connecting rod d 17; piston c14 is in cylinder c12, piston d15 is in cylinder d 13; the dehumidifier 1 is connected with the cylinder a3 through a pipeline a46, and the dehumidifier 1 is connected with the cylinder b4 through a pipeline b 47; cylinder a3 is connected to cooler a9 via conduit c48, and cooler a9 is connected to cylinder c12 via conduit e 50; cylinder b4 is connected to cooler b10 via conduit d49, and cooler b10 is connected to cylinder d13 via conduit f 51; cylinder c12 is connected to liquid air tank 19 via conduit g52, and cylinder d13 is connected to liquid air tank 19 via conduit h 53;
the liquid air refrigeration module mainly comprises: liquid air tank 19, user 20, conduit i 54; wherein the liquid air tank 19 is connected to the user 20 through a pipe i 54;
The control module mainly comprises: controller 18, temperature sensor a21, temperature sensor b22, temperature sensor c25, temperature sensor d26, temperature sensor e30, pressure sensor a23, pressure sensor b24, pressure sensor c27, pressure sensor d28, pressure sensor e29, valve a31, valve b32, valve c33, valve d34, valve e35, valve f36, valve g37, valve h38, valve i39, valve j40, valve k41, valve l42, valve m43, valve n44, and valve o 45; wherein the temperature sensor a21 is fixed on the cylinder a3 and is connected with the controller 18 through a control line; the temperature sensor b22 is fixed on the cylinder b4 and is connected with the controller 18 through a control line; the temperature sensor c25 is fixed on the cylinder c12 and is connected with the controller 18 through a control line; the temperature sensor d26 is fixed on the cylinder d13 and is connected with the controller 18 through a control line; temperature sensor e30 is fixed to user 20 and connected to controller 18 by a control line; the pressure sensor a23 is fixed on the cylinder a3 and is connected with the controller 18 through a control line; the pressure sensor b24 is fixed on the cylinder b4 and is connected with the controller 18 through a control line; the pressure sensor c27 is fixed on the cylinder c12 and is connected with the controller 18 through a control line; the pressure sensor d28 is fixed on the cylinder d13 and is connected with the controller 18 through a control line; the pressure sensor e29 is fixed on the liquid air tank 29 and is connected with the controller 18 through a control line;
The valve a31 is fixed on the pipeline a46 and is connected with the controller 18 through a control line; the valve b32 is fixed on the pipeline b47 and is connected with the controller 18 through a control line; the valve c33 is fixed on the pipeline c48 near the side of the cylinder a3 and is connected with the controller 18 through a control line; the valve d34 is fixed on the side of the pipeline d49 close to the cylinder b4 and is connected with the controller 18 through a control line; valve e35 is fixed on the side of pipe c48 close to cooler a9 and connected with controller 18 through a control line, and valve f36 is fixed on the side of pipe d49 close to cooler b10 and connected with controller 18 through a control line; the valve g37 is fixed on the side of the pipeline e50 close to the cooler a9 and is connected with the controller 18 through a control line; the valve h38 is fixed on the side of the pipeline f51 close to the cooler b10 and is connected with the controller 18 through a control line; the valve i39 is fixed on the pipeline e50 at one side close to the cylinder c12 and is connected with the controller 18 through a control line; the valve j40 is fixed on the side, close to the cylinder d13, of the pipeline f51 and is connected with the controller 18 through a control line; the valve k41 is fixed on the pipeline g52 near the side of the cylinder c12 and is connected with the controller 18 through a control line; the valve l42 is fixed on the pipeline h53 near one side of the cylinder d13 and is connected with the controller 18 through a control line; the valve m43 is fixed on the pipe g52 near one side of the liquid air tank 19 and is connected with the controller 18 through a control line; the valve n44 is fixed on the pipeline h53 near one side of the liquid air tank 19 and is connected with the controller 18 through a control line; the valve o45 is fixed to the pipe i54 and is connected to the controller 18 through a control line.
A double-stage multi-cylinder free piston compressed air refrigerating system has the following requirements on all parts of the equipment: the dehumidifier 1 is used for removing moisture in the air; the cylinder c12, the cylinder d13, the piston c14 and the piston d15 are made of low-temperature resistant materials; the pipeline c48 and the pipeline d49 adopt high-pressure resistant pipelines; the pipeline e50 and the pipeline f51 adopt high-pressure resistant pipelines; the pipeline g52 and the pipeline h53 adopt low-temperature and low-pressure resistant pipelines; the valve c33, the valve d34, the valve e35 and the valve f36 adopt high pressure resistant valves; the valve g37, the valve h38, the valve i39, the valve j40, the valve k41, the valve l42, the valve m43, the valve n44 and the valve o45 are low-temperature-resistant and high-pressure-resistant valves;
A double-stage multi-cylinder free piston compressed air refrigerating system has the working principle that: when the linear motor a2 drives the connecting rod a7 and the connecting rod b8 to move rightwards, the valve a31 is opened, air enters the cylinder a3 through the valve a31, the valve b32, the valve c33 and the valve d34 are closed, when the pressure sensor b24 displays that the pressure reaches 1.88MPa, the valve d34 and the valve f36 are opened, the compressed air in the cylinder b4 reduces the temperature of the compressed air to normal temperature through the cooler b10, the valve h38 and the valve j40 are opened, the normal-temperature high-pressure air enters the cylinder d 40 through the pipeline f 40, when all the compressed air enters the cylinder d 40, the linear motor b 40 drives the connecting rod c 40 and the connecting rod d 40 to move rightwards, the valve j40 and the valve l 40 are closed, and when the pressure displayed by the pressure gauge d 40 reaches 3.5MPa, the valve l 40 and the valve n 40 are opened, and the liquid air flows into the liquid air tank 19 through the pipeline h 36; at the moment, the linear motor a2 drives the connecting rod a7 and the connecting rod b8 to move leftwards, the valve b32 is opened, the valve a31, the valve c33 and the valve d34 are closed, when the pressure sensor a23 shows that the pressure reaches 1.88MPa, the valve c33 and the valve e35 are opened, the compressed air in the cylinder a3 reduces the temperature of the compressed air to normal temperature through the cooler a9, the valve g37 and the valve i39 are opened, when the compressed air completely enters the cylinder c12, the linear motor b11 drives the connecting rod c16 and the connecting rod d17 to move leftwards, the valve i39 and the valve k41 are closed, when the pressure gauge c27 shows that the pressure reaches 3.5MPa, the valve k41 and the valve m 41 are opened, the valve l 41 and the valve n 41 are closed, and liquid air flows into the liquid air tank 19 through the pipeline g 41; so as to reciprocate and store liquid air, when the resident needs to refrigerate, the temperature sensor e30 transmits a signal to the controller, the controller opens the valve o45, and the liquid air provides refrigeration for the user through the pipeline i 54.
Claims (3)
1. The utility model provides a doublestage multi-cylinder free piston compressed air refrigerating system which characterized in that mainly includes: the system comprises a free piston compressed air module, a liquid air refrigeration module and a control module;
The free piston compressed air module mainly comprises: the dehumidifier is characterized by comprising a dehumidifier (1), a linear motor a (2), a cylinder a (3), a cylinder b (4), a piston a (5), a piston b (6), a connecting rod a (7), a connecting rod b (8), a cooler a (9), a cooler b (10), a linear motor b (11), a cylinder c (12), a cylinder d (13), a piston c (14), a piston d (15), a connecting rod c (16), a connecting rod d (17), a pipeline a (46), a pipeline b (47), a pipeline c (48), a pipeline d (49), a pipeline e (50), a pipeline f (51), a pipeline g (52) and a pipeline h (53); the linear motor a (2) is fixedly connected with the piston a (5) through a connecting rod a (7); the linear motor a (2) is fixedly connected with the piston b (6) through a connecting rod b (8); the piston a (5) is arranged in the cylinder a (3), and the piston b (6) is arranged in the cylinder b (4); the linear motor b (11) is fixedly connected with the piston c (14) through a connecting rod c (16); the linear motor b (11) is fixedly connected with the piston d (15) through a connecting rod d (17); the piston c (14) is in the cylinder c (12), and the piston d (15) is in the cylinder d (13); the dehumidifier (1) is connected with the cylinder a (3) through a pipeline a (46), and the dehumidifier (1) is connected with the cylinder b (4) through a pipeline b (47); the cylinder a (3) is connected with a cooler a (9) through a pipeline c (48), and the cooler a (9) is connected with the cylinder c (12) through a pipeline e (50); the cylinder b (4) is connected with a cooler b (10) through a pipeline d (49), and the cooler b (10) is connected with a cylinder d (13) through a pipeline f (51); the cylinder c (12) is connected with the liquid air tank (19) through a pipeline g (52), and the cylinder d (13) is connected with the liquid air tank (19) through a pipeline h (53);
the liquid air refrigeration module mainly comprises: a liquid air tank (19), a user (20), a conduit i (54); wherein the liquid air tank (19) is connected with a user (20) through a pipeline i (54);
the control module mainly comprises: a controller (18), a temperature sensor a (21), a temperature sensor b (22), a temperature sensor c (25), a temperature sensor d (26), a temperature sensor e (30), a pressure sensor a (23), a pressure sensor b (24), a pressure sensor c (27), a pressure sensor d (28), a pressure sensor e (29), a valve a (31), a valve b (32), a valve c (33), a valve d (34), a valve e (35), a valve f (36), a valve g (37), a valve h (38), a valve i (39), a valve j (40), a valve k (41), a valve l (42), a valve m (43), a valve n (44) and a valve o (45); wherein the temperature sensor a (21) is fixed on the cylinder a (3) and is connected with the controller (18) through a control line; the temperature sensor b (22) is fixed on the cylinder b (4) and is connected with the controller (18) through a control line; the temperature sensor c (25) is fixed on the cylinder c (12) and is connected with the controller (18) through a control line; the temperature sensor d (26) is fixed on the cylinder d (13) and is connected with the controller (18) through a control line; the temperature sensor e (30) is fixed on a user (20) and is connected with the controller (18) through a control line; the pressure sensor a (23) is fixed on the cylinder a (3) and is connected with the controller (18) through a control line; the pressure sensor b (24) is fixed on the cylinder b (4) and is connected with the controller (18) through a control line; the pressure sensor c (27) is fixed on the cylinder c (12) and is connected with the controller (18) through a control line; the pressure sensor d (28) is fixed on the cylinder d (13) and is connected with the controller (18) through a control line; the pressure sensor e (29) is fixed on the liquid air tank (29) and is connected with the controller (18) through a control line;
The valve a (31) is fixed on the pipeline a (46) and is connected with the controller (18) through a control line; the valve b (32) is fixed on the pipeline b (47) and is connected with the controller (18) through a control line; the valve c (33) is fixed on one side of the pipeline c (48) close to the cylinder a (3) and is connected with the controller (18) through a control line; the valve d (34) is fixed on one side of the pipeline d (49) close to the cylinder b (4) and is connected with the controller (18) through a control line; the valve e (35) is fixed on the pipeline c (48) close to one side of the cooler a (9) and is connected with the controller (18) through a control line, and the valve f (36) is fixed on the pipeline d (49) close to one side of the cooler b (10) and is connected with the controller (18) through a control line; the valve g (37) is fixed on the pipeline e (50) close to one side of the cooler a (9) and is connected with the controller (18) through a control line; the valve h (38) is fixed on one side of the pipeline f (51) close to the cooler b (10) and is connected with the controller (18) through a control line; the valve i (39) is fixed on one side of the pipeline e (50) close to the cylinder c (12) and is connected with the controller (18) through a control line; the valve j (40) is fixed on one side of the pipeline f (51) close to the cylinder d (13) and is connected with the controller (18) through a control line; the valve k (41) is fixed on one side of the pipeline j (52) close to the cylinder c (12) and is connected with the controller (18) through a control line; the valve l (42) is fixed on one side of the pipeline h (53) close to the cylinder d (13) and is connected with the controller (18) through a control line; the valve m (43) is fixed on the pipeline g (52) close to one side of the liquid air tank (19) and is connected with the controller (18) through a control line; the valve n (44) is fixed on one side of the pipeline h (53) close to the liquid air tank (19) and is connected with the controller (18) through a control line; the valve o (45) is fixed on the pipeline i (54) and is connected with the controller (18) through a control line.
2. The equipment requirement for applying the double-stage multi-cylinder free piston compressed air refrigerating system as claimed in claim 1 is as follows: the dehumidifier (1) is used for removing moisture in the air; the cylinder c (12), the cylinder d (13), the piston c (14) and the piston d (15) are made of low-temperature resistant materials; the pipeline c (48) and the pipeline d (49) adopt high-pressure-resistant pipelines; the pipeline e (50) and the pipeline f (51) adopt high-pressure resistant pipelines; the pipeline g (52) and the pipeline h (53) adopt low-temperature and low-pressure resistant pipelines; the valve c (33), the valve d (34), the valve e (35) and the valve f (36) adopt high-pressure-resistant valves; the valve g (37), the valve h (38), the valve i (39), the valve j (40), the valve k (41), the valve l (42), the valve m (43), the valve n (44) and the valve o (45) adopt low-temperature and high-pressure resistant valves.
3. The working state of the double-stage multi-cylinder free piston compressed air refrigerating system applying the method as claimed in claims 1-2 is as follows: when a linear motor a (2) drives a connecting rod a (7) and a connecting rod b (8) to move rightwards, a valve a (31) is opened, air enters an air cylinder a (3) through the valve a (31), a valve b (32), a valve c (33) and a valve d (34) are closed, when a pressure sensor b (24) displays that the pressure reaches 1.88MPa, the valve d (34) and a valve f (36) are opened, the temperature of the compressed air in the air cylinder b (4) is reduced to normal temperature through a cooler b (10), a valve h (38) and a valve j (40) are opened, the high-pressure air at the normal temperature enters an air cylinder d (13) through a pipeline f (51), when all the compressed air enters the air cylinder d (13), the linear motor b (11) drives the connecting rod c (16) and the connecting rod d (17) to move rightwards, the valve j (40) and the valve l (42) are closed, and when a pressure gauge d (28) displays that the pressure reaches 3.5MPa, the valve l (42) and the valve n (44) are opened, and the liquid air flows into the liquid air tank (19) through the pipeline h (53); at the moment, the linear motor a (2) drives the connecting rod a (7) and the connecting rod b (8) to move leftwards, the valve b (32) is opened, the valve a (31), the valve c (33) and the valve d (34) are closed, when the pressure sensor a (23) displays that the pressure reaches 1.88MPa, the valve c (33) and the valve e (35) are opened, the compressed air in the cylinder a (3) is cooled to the normal temperature through the cooler a (9), the valve g (37) and the valve i (39) are opened, when all the compressed air enters the cylinder c (12), the linear motor b (11) drives the connecting rod c (16) and the connecting rod d (17) to move leftwards, the valve i (39) and the valve k (41) are closed, when the pressure gauge c (27) displays that the pressure reaches 3.5MPa, the valve k (41), the valve m (43) is opened, the valve l (42) and the valve n (44) are closed, liquid air flows into the liquid air tank (19) through a pipe g (52); so as to reciprocate and store liquid air, when the resident needs refrigeration, the temperature sensor e (30) transmits a signal to the controller, the controller opens the valve o (45), and the liquid air provides refrigeration for the user through the pipeline i (54).
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