CN116045715B - Energy-saving screw air compressor - Google Patents
Energy-saving screw air compressor Download PDFInfo
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- CN116045715B CN116045715B CN202310023142.9A CN202310023142A CN116045715B CN 116045715 B CN116045715 B CN 116045715B CN 202310023142 A CN202310023142 A CN 202310023142A CN 116045715 B CN116045715 B CN 116045715B
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- cooling
- bag
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- air
- flexible bag
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
Abstract
The invention discloses an energy-saving screw air compressor, and belongs to the field of air compressors. An energy-conserving screw air compressor for retrieve the heat of the high hot gas stream of air compressor body exhaust, include: a cooling tank in which cooling water flowing in an axial direction is built; the air transmission pipeline is communicated with the air outlet of the air compressor body, and at least part of the pipe section is positioned in the cooling box; a cooling flexible bladder made of at least a material having elasticity or flexibility to have the ability to deform in a radial direction; the cooling flexible bag is fixedly arranged on a pipe section of the gas transmission pipeline to receive high-temperature gas flow and is positioned in the cooling box to release heat; the axial direction of the cooling flexible bag is the same as the axial direction of the cooling box; the thermomagnetic valve is arranged at the outlet of the cooling flexible bag and is a valve for discharging high-temperature air flow; the heat of the gas exhausted by the air compressor body can be fully recycled.
Description
Technical Field
The invention belongs to the field of air compressors, and particularly relates to an energy-saving screw air compressor.
Background
The air compressor is widely used as a power source, and consumes huge energy in operation, and statistics of the United states energy agency indicate that the electric energy consumed by the compressor in operation is really used for increasing the air potential energy by only 15% of the total electric consumption, and the rest electric energy (about 85%) is converted into heat. This heat is typically exhausted to the atmosphere by air cooling or water cooling, resulting in significant energy waste and waste heat pollution.
Generally, heat attached to compressed air is absorbed by water to collect energy, such as a heat recovery pipe device for a screw air compressor body of patent number CN201711120210.4, which comprises an exhaust pipe and a heat recovery box, wherein the exhaust pipe comprises a first circular pipe section, a flat pipe section and a second circular pipe section which are connected in sequence; the exhaust pipe passes through the heat recovery box, and the flat pipe section is arranged in the heat recovery box; an atomizing nozzle is arranged at the top of the heat recovery box, a water pump and a water tank are sequentially connected outside the atomizing nozzle, and a drainage tube and a water storage tank are arranged at the bottom of the heat recovery box; after the air flow flows into the exhaust pipe, the air flow is fully dispersed when flowing through the flat pipe section of the exhaust pipe, atomized cold water vapor and water drops are sprayed from the atomizing nozzle and fall onto the flat pipe section, clean hot water flows are formed after the heat of hot air in the flat pipe section is absorbed, and the hot water finally flows into the water storage tank through the drainage pipe for recycling, so that a large amount of heat energy waste is avoided.
Although the above-mentioned technical solution can collect the heat of the compressed gas, after the air flow passes through the exhaust pipeline, the flow velocity change is not obvious, the contact time between the high-heat air flow and the cooling water is too short, and the heat cannot be fully released in the pipeline with a limited length, so that the heat recovery efficiency is lower.
Disclosure of Invention
The invention aims to solve the technical problem of providing an energy-saving screw air compressor, which can realize that the heat of the air exhausted by the air compressor body is fully recycled.
The invention relates to an energy-saving screw air compressor, which is used for recovering heat of high-temperature airflow discharged by an air compressor body and comprises the following components:
a cooling tank in which cooling water flowing in an axial direction is built;
the air transmission pipeline is communicated with the air outlet of the air compressor body, and at least part of the pipe section is positioned in the cooling box;
a cooling flexible bladder made of at least a material having elasticity or flexibility to have the ability to deform in a radial direction; the cooling flexible bag is fixedly arranged on a pipe section of the gas transmission pipeline to receive high-temperature gas flow and is positioned in the cooling box to release heat; the axial direction of the cooling flexible bag is the same as the axial direction of the cooling box; and
the thermomagnetic valve is arranged at the outlet of the cooling flexible bag and is a valve for discharging high-temperature air flow; the thermomagnetic valve at least comprises a valve body component which is magnetically connected, wherein the valve body component directly or indirectly acquires heat released by high-temperature air flow, and the heat is inversely related to magnetic force; the opening degree of the thermomagnetic valve element is inversely related to the heat receiving quantity.
As a further improvement of the invention, the cooling flexible bag comprises a bag body and an elastic ring; the bag body is made of flexible materials and is provided with a plurality of folds; the elastic ring is made of elastic material and sleeved on the periphery of the bag body; when the cooling flexible bag is in a contracted state, adjacent folds are mutually attached, and part of the surfaces of the folds are contacted with cooling water; when the cooling flexible bag is in an expanded state, the folds stretch and deform, the surfaces of the folds are contacted with cooling water, and the elastic ring is driven by the expansion of the bag body to stretch outwards and elastically deform.
As a further improvement of the invention, the cross sections of the folds are arc-shaped when the cooling flexible bag is in an expanded state, and the adjacent folds are provided with depressions for guiding the flow of cooling water.
As a further improvement of the invention, the thermomagnetic valve element comprises a lower magnetic element and an upper magnetic element; the lower magnetic piece is fixedly arranged at the lower side in the gas transmission pipeline at the gas outlet of the cooling flexible bag; the upper magnetic part is fixedly arranged on the upper side in the gas transmission pipeline at the gas outlet of the cooling flexible bag; the upper magnetic part comprises a packaging bag and a magnetic one part; the magnetic piece is at least made of a permanent magnet and is positioned in the packaging bag; the packaging bag is fixedly arranged on the inner wall of the gas transmission pipeline, a through hole is formed in the wall of the gas transmission pipeline corresponding to the packaging bag, so that cooling water receiving excessive heat is led into the packaging bag to contact with the magnetic one piece, the packaging bag is made of flexible or elastic materials and has telescopic capability, the magnetic one piece is movable relative to the wall of the pipe, and the packaging bag isolates the magnetic one piece from high hot air flow; the lower magnetic piece comprises an isolation bag and a magnetic two piece; the isolation bag is fixedly arranged on the inner wall of the gas transmission pipeline, the magnetic two pieces are at least made of permanent magnets, the magnetism of the opposite sides of the magnetic two pieces is the same as that of the magnetic one piece, the isolation bag isolates the magnetic two pieces from high thermal current, and the magnetic two pieces are fixed relative to the pipe wall; the magnetic intensity of the magnetic piece is inversely related to the temperature of the contacted cooling water; when the temperature of the cooling water is lower than a set threshold value, the magnetic force between the first magnetic piece and the second magnetic piece is larger than the gravity born by the first magnetic piece, and a gap is kept between the first magnetic piece and the second magnetic piece; when the temperature of the cooling water reaches a set threshold value, the magnetic force between the first magnetic part and the second magnetic part is equal to or smaller than the gravity born by the first magnetic part, the first magnetic part approaches to the second magnetic part, and the gap between the first magnetic part and the second magnetic part is reduced.
As a further improvement of the invention, at least one water guide groove is arranged on the surface of the cooling flexible bag, the axial direction of the water guide groove is the same as the water flowing direction of the cooling water, and the extending direction of the water guide groove points to a through hole formed in the wall of the gas transmission pipeline corresponding to the packaging bag.
As a further improvement of the invention, the cooling flexible bladder is shaped like a shuttle.
As a further improvement of the invention, an air inlet flow sensor is arranged in an air conveying pipeline at the air inlet of the cooling flexible bag so as to sense the flow of high-temperature air flow entering the cooling flexible bag; an air outlet flow sensor is arranged in an air transmission pipeline at the air outlet of the cooling flexible bag so as to sense the flow of high hot air flow discharged from the cooling flexible bag; the air inlet flow sensor and the air outlet flow sensor are electrically connected with a peripheral control system to transmit flow data, and the control system calculates the amount of air in the cooling flexible bag according to the flow data to judge whether the air pressure in the cooling flexible bag reaches a maximum threshold value.
As a further improvement of the invention, the number of the cooling flexible bags is a plurality; the plurality of cooling flexible bags are connected with the exhaust port of the air compressor body in parallel; the air inlet of the cooling flexible bags is controlled by a multi-way valve arranged on the air transmission pipeline; the multi-way valve allows venting to only one cooling bladder at a time; the multi-way valve is electrically connected with the control system to control the control system to switch the ventilation direction; the timing of the switching of the ventilation direction of the multi-way valve is that the internal pressure of the ventilated cooling flexible bag reaches the maximum limit.
As a further improvement of the invention, the cooling water flows at the periphery of the plurality of cooling flexible bags are positioned in independent cavities and are not communicated with each other.
As a further improvement of the invention, the cooling flexible bag comprises a bag positioned at the upper side in the cooling box and four bags positioned at the lower side in the cooling box; when the four bags expand, the water at the lower side in the cooling box is driven to flow towards the direction of the bag; the four bags are communicated with one bag so that the hot air temporarily stored in the four bags flows to the one bag.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the cooling flexible bag and the thermomagnetic valve are arranged, so that the high-temperature air flow is inflated after being filled into the cooling flexible bag, the cooling flexible bag is expanded, the air flow with a large amount of heat energy is reserved, the contact time of the air flow and cooling water is prolonged, and the heat of the high-temperature air flow is recovered as much as possible; the opening gap size of the thermomagnetic valve can be changed according to the temperature of cooling water, at the initial stage of the high-temperature air flow entering the cooling flexible bag, the air flow contains more heat energy, the heat energy transferred to the cooling water is also more, the cooling water passing through the surface of the cooling flexible bag is heated, the heated cooling water enters the sealing bag through the through holes on the wall of the air conveying pipeline to contact with the first magnetic part, the first magnetic part is transferred with heat so that the magnetism of the first magnetic part is weakened, the gravity overcomes the magnetic repulsive force due to the gravity action of the first magnetic part, the first magnetic part moves downwards, the opening size of the thermomagnetic valve is reduced, the discharge speed and the discharge amount of the high-temperature air flow in the cooling flexible bag are reduced, and the high-temperature air flow can be recovered by the cooling water as much as possible;
according to the invention, the grooves for diversion are arranged on the outer surface of the cooling flexible bag, so that cooling water passing through the cooling flexible bag absorbs heat and is diverted to the thermomagnetic valve, and the accuracy of the heat acquired by the thermomagnetic valve is improved;
according to the invention, the plurality of cooling flexible bags are arranged, so that after the maximum limit air pressure of one bag is reached, the air compression process can be not interrupted, and the high-heat air flow is discharged to the two bags or the three bags for cooling, so that the problem that the high-heat air flow cannot be borne by the one bag due to the excessively strong power of the compressor is avoided, the contact time of the high-heat air flow with cooling water can be prolonged as much as possible, and the heat energy is fully recovered;
according to the invention, the upper and lower cooling flexible bags are respectively arranged in the cooling box and are respectively the one bag and the four bags, the four bags are positioned at the lowest layer of the cooling box and are communicated with the one bag, namely, the four bags are used for receiving the gas discharged by the air compressor body and then discharging the gas to the one bag for secondary cooling, and after the air pressure in the one bag reaches the limit, the four bags receive high hot air flow, after the four bags expand, the water with lower temperature at the lower side in the cooling box can be promoted to flow to the one bag side at the upper side, meanwhile, the flow speed of cooling water at the periphery of the one bag is improved, the temperature recovery speed of the high hot air flow in the one bag is accelerated, the air pressure in the one bag is accelerated to drop, the two cooling flexible bags are facilitated to receive the high hot air flow discharged by the air compressor body in time, and the heat recovery of the high hot air flow can be effectively ensured under the condition of maintaining the normal operation of the air compressor body.
Drawings
FIG. 1 is a schematic diagram of a system architecture according to a first embodiment of the present invention;
FIG. 2 is a schematic view of a cooling tank according to a first embodiment of the present invention;
FIG. 3 is a schematic illustration of a thermo-magnetic valve according to a first embodiment of the present invention when the thermo-magnetic valve is closed;
FIG. 4 is a schematic illustration of a thermo-magnetic valve of a first embodiment of the present invention when open;
FIG. 5 is a schematic cross-sectional view of a cooling bladder according to a first embodiment of the present invention when contracted;
FIG. 6 is a schematic cross-sectional view of a cooling bladder according to a first embodiment of the present invention when inflated;
FIG. 7 is a schematic view of a cooling tank according to a second embodiment of the present invention;
fig. 8 is a schematic view of the cooling box according to a third embodiment of the present invention.
The reference numerals in the figures illustrate:
the air compressor comprises an air compressor body 1, a cooling box 2, an air transmission pipeline 3, a cooling flexible bag 4, a first bag 41, a second bag 42, a third bag 43, a fourth bag 44, a thermomagnetic valve element 5, a lower magnetic element 51 and an upper magnetic element 52.
Detailed Description
First embodiment: an energy-saving screw air compressor is shown in fig. 1-6, and is used for recovering heat of high-heat air flow discharged from an air compressor body 1, wherein the high-heat air flow generally refers to air with a temperature of about 130 ℃.
The system comprises a cooling box 2, a gas transmission pipeline 3, a cooling flexible bag 4 and a thermomagnetic valve element 5.
The cooling tank 2 houses cooling water flowing in the axial direction; the cooling tank 2 is provided with a water inlet and a water outlet, cooling water is continuously filled into the cooling tank 2 and discharged, the discharged cooling water absorbing heat is used for reserving heat through a heat recovery system, and the heat recovery system belongs to conventional means and is not described in detail herein.
The gas transmission pipeline 3 is communicated with the gas outlet of the air compressor body 1, and at least part of the pipeline section is positioned in the cooling box 2.
The cooling flexible bag 4 is fixedly arranged on a pipe section of the gas pipeline 3 to receive high-temperature gas flow and is positioned on the cooling box 2 to release heat; the cooling flexible bag 4 is in a shuttle shape, and the axial direction of the cooling flexible bag 4 is the same as the axial direction of the cooling box 2; the cooling flexible bag 4 comprises a bag body and an elastic ring; the bag body is made of flexible materials and has the capability of stretching and deforming along the radial direction, and is provided with a plurality of folds; the elastic ring is made of elastic material and sleeved on the periphery of the bag body; in the contracted state, the cooling flexible bags 4 are attached to each other, and part of the surfaces of the folds are contacted with cooling water; the cooling flexible bag 4 is in an expansion state, the folds stretch and deform, the surfaces of the folds are contacted with cooling water, the elastic rings are driven by the expansion of the bag body to stretch outwards and elastically deform, the cross sections of the folds are arc-shaped, the adjacent folds are provided with depressions for guiding the cooling water to flow, the depressions exist in the form of water guide grooves, and the axial direction of the water guide grooves is the same as the direction of the cooling water.
The thermomagnetic valve element 5 is arranged in the gas pipeline 3 at the outlet of the cooling flexible bag 4 and is a valve for discharging high-temperature gas flow. The thermo-magnetic valve 5 includes a lower magnetic member 51, an upper magnetic member 52.
As shown in fig. 3 or 4, the upper magnetic member 52 is fixedly arranged on the upper side in the air delivery pipeline 3 at the air outlet of the cooling flexible bag 4; the lower magnetic piece 51 is fixedly arranged at the lower side in the air conveying pipeline 3 at the air outlet of the cooling flexible bag 4.
The upper magnetic piece 52 comprises a packaging bag and a magnetic one piece; the magnetic piece is a permanent magnet and is positioned in the packaging bag and at the lower end in the packaging bag, and the space in the packaging bag is larger than the volume of the magnetic piece so as to contain the heated cooling water; the packaging bag is fixedly arranged on the inner wall of the gas transmission pipeline 3, a through hole is formed in the wall of the gas transmission pipeline 3 corresponding to the packaging bag, so that cooling water receiving excessive heat is led into the packaging bag to contact with the magnetic piece, and the extending direction of the water guide groove of the cooling flexible bag 4 points to the through hole formed in the wall of the gas transmission pipeline 3 corresponding to the packaging bag; the packaging bag is made of flexible or elastic materials to have the telescopic capability, the magnetic piece is movable relative to the pipe wall, and the packaging bag is a sealed and heat-resistant bag body for isolating the magnetic piece from high-temperature air flow.
The lower magnetic member 51 includes an isolation pocket and two magnetic members; the isolation bag is fixedly arranged on the inner wall of the gas transmission pipeline 3, the two magnetic pieces are permanent magnets, and the space in the isolation bag is equal to the volume of the two magnetic pieces, so that the two magnetic pieces are fixed relative to the pipe wall; the magnetism of the opposite side of the magnetic second piece and the magnetic first piece is the same, and the isolation bag is a sealed and heat-resistant bag body so as to isolate the magnetic second piece from high thermal air current; the magnetic intensity of the magnetic piece is inversely related to the temperature of the contacted cooling water; when the temperature of the cooling water is lower than a set threshold value, the magnetic force between the first magnetic piece and the second magnetic piece is larger than the gravity born by the first magnetic piece, and a gap is kept between the first magnetic piece and the second magnetic piece; when the temperature of the cooling water reaches a set threshold value, the magnetic force between the first magnetic part and the second magnetic part is equal to or smaller than the gravity born by the first magnetic part, the first magnetic part approaches to the second magnetic part, and the gap between the first magnetic part and the second magnetic part is reduced.
An air inlet flow sensor is arranged in the air transmission pipeline 3 at the air inlet of the cooling flexible bag 4 so as to sense the flow of high hot air flow entering the cooling flexible bag 4; an air outlet flow sensor is arranged in the air transmission pipeline 3 at the air outlet of the cooling flexible bag 4 so as to sense the flow of high hot air flow discharged from the cooling flexible bag 4; the air inlet flow sensor and the air outlet flow sensor are electrically connected with a peripheral control system to transmit flow data, and the control system calculates the amount of air in the cooling flexible bag 4 according to the flow data to judge whether the air pressure in the cooling flexible bag 4 reaches a maximum threshold value.
Working principle: the air compressor body 1 discharges high-temperature air flow to enter a cooling flexible bag 4 positioned in the cooling box 2 through the air transmission pipeline 3, and an air inlet flow sensor senses the air quantity entering the cooling flexible bag 4; because the temperature of the air flow entering the cooling flexible bag 4 is higher, the cooling flexible bag 4 has certain stretching capacity, the cooling water outside the cooling flexible bag 4 obtains the heat of the high-temperature air flow in the bag and flows into the packaging bag, one magnetic part is heated and the magnetism is reduced, and moves downwards under the influence of gravity, so that the caliber of the air outlet of the cooling flexible bag 4 is reduced, the cooling flexible bag 4 can prolong the time of the high-temperature air flow in the cooling box 2, and the heat energy of the air is effectively recovered; in addition, according to the gas quantity data of the gas outlet flow sensor, the gas quantity in the cooling flexible bag 4 can be judged, the gas pressure in the cooling flexible bag 4 can be indirectly judged, and if the maximum gas pressure limit is reached, the gas quantity of the gas exhausted by the air compressor body can be weakened, and the damage of the cooling flexible bag 4 is avoided.
Optionally, a temperature sensor electrically connected with the control system is arranged in the cooling flexible bag 4 or the air delivery pipeline 3 to obtain the real-time temperature of the air flow in the cooling flexible bag 4, and the air pressure in the cooling flexible bag 4 is accurately judged by combining the air quantity data of the air inlet flow sensor and the air outlet flow sensor.
Specific embodiment II: referring to fig. 7, the number of cooling flexible bags 4 is plural according to the first embodiment; in the present embodiment, three cooling flexible bags 4 are taken as an example, and a first bag 41, a second bag 42 and a third bag 43 are respectively used. The plurality of cooling flexible bags 4 are connected with the exhaust port of the air compressor body 1 in parallel; the air inlet of the cooling flexible bags 4 is controlled by a multi-way valve arranged on the air transmission pipeline 3; the multiport valve allows ventilation to only one cooling bladder 4 at a time; the multi-way valve is electrically connected with the control system to control the control system to switch the ventilation direction; the timing of switching the ventilation direction of the multiway valve is such that the internal pressure of the ventilated cooling flexible bag 4 reaches the maximum limit.
The purpose that sets up like this guarantees effectively that cooling flexible bag 4 can not damage because of the tolerance is too big under the unchangeable prerequisite of power of air compressor machine body, and after one flexible bag bears atmospheric pressure to the limit, switch the ventilation circuit immediately for other flexible bags bear the high hot air current.
It should be noted that, the priorities of the three flexible bags for receiving the hot air flow are a first bag 41, a second bag 42 and a third bag 43 in sequence; when the air pressure in one of the bags 41 is less than the limit air pressure, the air is preferably ventilated into one of the bags 41.
Optionally, the cooling water flows at the periphery of the plurality of cooling flexible bags 4 are positioned in independent cavities and are not communicated with each other, so that the cooling efficiency of the three flexible bags is ensured to be independent and identical.
Third embodiment: in contrast to the first embodiment, referring to fig. 8, the cooling flexible bag 4 includes a bag 41 located at the upper side inside the cooling tank 2 and four bags 44 located at the lower side inside the cooling tank 2; when the four bags 44 are expanded, the water at the lower side in the cooling box 2 is driven to flow towards the direction of the bag 41; the four pockets 44 communicate with one pocket 41 so that the hot air temporarily stored in the four pockets 44 flows to the one pocket 41.
The purpose of this arrangement is that the four-bag 44 is communicated with the one bag 41, namely, after the four-bag 44 receives the gas discharged by the air compressor body 1, the gas is cooled for the first time and then discharged to the one bag 41 for secondary cooling, as the four-bag 44 receives high hot air flow after the air pressure in the one bag 1 reaches the limit, the four-bag 44 can promote the water with lower temperature in the lower side of the cooling box 2 to flow to the side of the one bag 41 positioned on the upper side after being expanded, meanwhile, the flow speed of the cooling water at the periphery of the one bag 1 is improved, the temperature recovery speed of the high hot air flow in the one bag 41 is accelerated, the air pressure in the one bag 41 is accelerated to be reduced, the pressure in the two cooling flexible bags 4 is reduced conveniently, the high hot air flow discharged by the air compressor body 1 is received in time, and the heat recovery of the high hot air flow can be effectively ensured under the condition that the normal operation of the air compressor body 1 is maintained.
Claims (10)
1. An energy-saving screw air compressor for recovering heat of high-temperature air flow discharged from an air compressor body (1), characterized by comprising:
a cooling tank (2) in which cooling water flowing in the axial direction is contained;
the gas transmission pipeline (3) is communicated with the gas outlet of the air compressor body (1), and at least part of the pipeline section is positioned in the cooling box (2);
a cooling flexible bladder (4) made of at least a material having elasticity or flexibility so as to have the ability to deform in a radial direction; the cooling flexible bag (4) is fixedly arranged on a pipe section of the gas transmission pipeline (3) to receive high-temperature gas flow and is positioned in the cooling box (2) to release heat; the axial direction of the cooling flexible bag (4) is the same as the axial direction of the cooling box (2); and
the thermomagnetic valve (5) is arranged at the outlet of the cooling flexible bag (4) and is a valve for discharging high hot air flow; the thermomagnetic valve (5) at least comprises a valve body component which is magnetically connected, wherein the valve body component directly or indirectly acquires heat released by high-temperature airflow, and the heat is inversely related to magnetic force; the opening degree of the thermomagnetic valve (5) is inversely related to the heat receiving quantity.
2. An energy-saving screw air compressor according to claim 1, wherein: the cooling flexible bag (4) comprises a bag body and an elastic ring; the bag body is made of flexible materials and is provided with a plurality of folds; the elastic ring is made of elastic material and sleeved on the periphery of the bag body; the cooling flexible bag (4) is in a contracted state, adjacent folds are mutually attached, and part of the surfaces of the folds are in contact with cooling water; the cooling flexible bag (4) is in an expanded state, the folds stretch and deform, the surfaces of the folds are contacted with cooling water, and the elastic ring is driven by the expansion of the bag body to stretch outwards and elastically deform.
3. An energy-saving screw air compressor according to claim 2, wherein: the cooling flexible bag (4) is in an expanded state, the sections of the folds are arc-shaped, and the adjacent folds are provided with depressions for guiding cooling water to flow.
4. An energy-saving screw air compressor according to claim 1, wherein: the thermomagnetic valve (5) comprises a lower magnetic element (51) and an upper magnetic element (52); the lower magnetic piece (51) is fixedly arranged at the lower side in the gas transmission pipeline (3) at the gas outlet of the cooling flexible bag (4); the upper magnetic part (52) is fixedly arranged on the upper side in the gas transmission pipeline (3) at the gas outlet of the cooling flexible bag (4); the upper magnetic piece (52) comprises a packaging bag and a magnetic piece; the magnetic piece is at least made of a permanent magnet and is positioned in the packaging bag; the packaging bag is fixedly arranged on the inner wall of the gas transmission pipeline (3), a through hole is formed in the wall of the gas transmission pipeline (3) corresponding to the packaging bag, so that cooling water receiving excessive heat is led into the packaging bag to contact with the magnetic one piece, the packaging bag is made of flexible or elastic materials and has telescopic capability, the magnetic one piece is movable relative to the wall of the pipe, and the packaging bag isolates the magnetic one piece from high hot air flow; the lower magnetic piece (51) comprises an isolation bag and two magnetic pieces; the isolation bag is fixedly arranged on the inner wall of the gas transmission pipeline (3), the magnetic two pieces are at least made of permanent magnets, the magnetism of the opposite sides of the magnetic two pieces is the same as that of the magnetic one piece, the isolation bag isolates the magnetic two pieces from high-temperature gas flow, and the magnetic two pieces are fixed relative to the pipe wall; the magnetic intensity of the magnetic piece is inversely related to the temperature of the contacted cooling water; when the temperature of the cooling water is lower than a set threshold value, the magnetic force between the first magnetic piece and the second magnetic piece is larger than the gravity born by the first magnetic piece, and a gap is kept between the first magnetic piece and the second magnetic piece; when the temperature of the cooling water reaches a set threshold value, the magnetic force between the first magnetic part and the second magnetic part is equal to or smaller than the gravity born by the first magnetic part, the first magnetic part approaches to the second magnetic part, and the gap between the first magnetic part and the second magnetic part is reduced.
5. The energy-saving screw air compressor of claim 4, wherein: at least one water guide groove is arranged on the surface of the cooling flexible bag (4), the axial direction of the water guide groove is the same as the water flowing direction of the cooling water, and the extending direction of the water guide groove points to a through hole formed in the pipe wall of the gas transmission pipeline (3) corresponding to the packaging bag.
6. An energy-saving screw air compressor according to claim 1, wherein: the cooling flexible bag (4) is in a fusiform shape.
7. An energy-saving screw air compressor according to claim 1, wherein: an air inlet flow sensor is arranged in an air transmission pipeline (3) at the air inlet of the cooling flexible bag (4) so as to sense the flow of high-temperature air flow entering the cooling flexible bag (4); an air outlet flow sensor is arranged in an air transmission pipeline (3) at the air outlet of the cooling flexible bag (4) so as to sense the flow of high hot air flow discharged from the cooling flexible bag (4); the air inlet flow sensor and the air outlet flow sensor are electrically connected with a peripheral control system to transmit flow data, and the control system calculates the amount of air in the cooling flexible bag (4) according to the flow data to judge whether the air pressure in the cooling flexible bag (4) reaches a maximum threshold value.
8. The energy-saving screw air compressor of claim 7, wherein: the number of the cooling flexible bags (4) is a plurality; the cooling flexible bags (4) are connected with the exhaust port of the air compressor body (1) in parallel; the air inlet of the cooling flexible bags (4) is controlled by a multi-way valve arranged on the air transmission pipeline (3); the multi-way valve allows ventilation to only one cooling bladder (4) at a time; the multi-way valve is electrically connected with the control system to control the control system to switch the ventilation direction; the switching time of the ventilation direction of the multi-way valve is that the internal pressure of the ventilated cooling flexible bag (4) reaches the maximum limit.
9. The energy-saving screw air compressor of claim 8, wherein: the cooling water flows at the periphery of the cooling flexible bags (4) are positioned in independent cavities and are not communicated with each other.
10. The energy-saving screw air compressor of claim 8, wherein: the cooling flexible bag (4) comprises a bag (41) positioned at the upper side in the cooling box (2) and four bags (44) positioned at the lower side in the cooling box (2); when the four bags (44) are expanded, water at the lower side in the cooling box (2) is driven to flow towards the direction of the bag (41); the four pockets (44) are communicated with one pocket (41) so that the hot air temporarily stored in the four pockets (44) flows to the one pocket (41).
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| CN202310023142.9A CN116045715B (en) | 2023-01-09 | 2023-01-09 | Energy-saving screw air compressor |
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| CN202310023142.9A CN116045715B (en) | 2023-01-09 | 2023-01-09 | Energy-saving screw air compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1025639C (en) * | 1989-11-28 | 1994-08-10 | 株式会社特尔弗 | Reduced pressure steam heat treating device |
| JP4020725B2 (en) * | 2002-07-29 | 2007-12-12 | 富士通株式会社 | Electronic equipment with energy-saving cooling system |
| JP2006284144A (en) * | 2005-04-04 | 2006-10-19 | Denso Corp | Exhaust heat recovery device |
| JP2008180120A (en) * | 2007-01-24 | 2008-08-07 | Matsushita Electric Ind Co Ltd | Motor driven compressor |
| GB201118339D0 (en) * | 2011-10-24 | 2011-12-07 | Cambridge Reactor Design Ltd | Heating and cooling apparatus |
| BE1020311A3 (en) * | 2012-02-28 | 2013-07-02 | Atlas Copco Airpower Nv | SCREW COMPRESSOR. |
| JP6384256B2 (en) * | 2014-10-10 | 2018-09-05 | 株式会社デンソー | Magneto-caloric element and thermomagnetism cycle device |
| EP3246647B1 (en) * | 2016-05-19 | 2019-10-30 | Borgwarner Emissions Systems Spain, S.L.U. | Heat exchange device |
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