CN108088104B - Self-adjusting intelligent refrigerating system - Google Patents

Self-adjusting intelligent refrigerating system Download PDF

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Publication number
CN108088104B
CN108088104B CN201711185366.0A CN201711185366A CN108088104B CN 108088104 B CN108088104 B CN 108088104B CN 201711185366 A CN201711185366 A CN 201711185366A CN 108088104 B CN108088104 B CN 108088104B
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compressor
cooling
evaporator
condenser
temperature
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CN108088104A (en
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胡效宗
曲耀辉
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Zhongke Meiling Cryogenics Co Ltd
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Zhongke Meiling Cryogenics Co Ltd
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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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/04—Compression machines, plants or systems, with several condenser circuits arranged in series
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/006—Cooling of compressor or motor
    • 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
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Compressor (AREA)

Abstract

The invention discloses a self-regulating intelligent refrigeration system, which comprises a compressor, a condenser, an evaporator and a cooling device, wherein the compressor, the condenser and the evaporator are connected through pipelines to form a closed loop filled with a refrigeration medium; the cooling device is connected with the condenser and comprises a cooling part, and the cooling part is arranged on the compressor to realize the cooling effect on the compressor; the cooling device communicated with the refrigeration cycle is arranged to realize the cooling operation of the compressor, so that the arrangement of other devices is avoided, and the energy consumption is reduced.

Description

Self-adjusting intelligent refrigerating system
Technical Field
The invention relates to the field of refrigeration, in particular to a self-adjusting intelligent refrigeration system.
Background
In the known technical field, a refrigerator is an essential household appliance in life of people, and the existing refrigerator generally performs heat exchange through a compressor to achieve a refrigeration effect; in long-time use, the temperature is easy to overheat along with the increase of the working time of the compressor of the refrigerator; the surface temperature index of the compressor of the totally enclosed refrigerator and freezer produced by manufacturers at home and abroad at present is generally 80-90 ℃, the power consumption of the refrigerator and freezer is increased due to overhigh temperature of the compressor, the refrigeration efficiency is reduced, and the insulating layer of the coil of the compressor is aged and falls off, so that the service life of the compressor is greatly shortened and even the compressor can be burnt.
Generally adopt air-cooled mode to cool down the compressor among the current refrigerating system, set up the fan near the compressor promptly, the fan accelerates the circulation of air on compressor surface, realizes the reduction of compressor temperature, nevertheless dispels the heat to the compressor through air cooling device, both increased extra power consumption, simultaneously because the use of motor can produce a large amount of heats in the air cooling device equally, cause the cooling effect not obvious.
In view of the above-mentioned drawbacks, the inventors of the present invention have finally obtained the present invention through a long period of research and practice.
Disclosure of Invention
In order to solve the technical defects, the technical scheme adopted by the invention is to provide a self-regulating intelligent refrigeration system, which comprises a compressor, a condenser, an evaporator and a cooling device, wherein the compressor, the condenser and the evaporator are connected through pipelines to form a closed loop filled with a refrigeration medium; the cooling device is connected with the condenser, the cooling device comprises a cooling portion, and the cooling portion is arranged on the compressor to achieve the cooling effect of the compressor.
Preferably, the condenser includes a first condensation portion and a second condensation portion, and the first condensation portion and the second condensation portion are communicated through the cooling device.
Preferably, the compressor is provided with a pipe inlet hole and a pipe outlet hole, the cooling device further comprises a cooling pipe, the cooling pipe extends into the interior of the compressor from the pipe inlet hole and extends out of the pipe outlet hole, the cooling portion is communicated with the first condensation portion and the second condensation portion through the cooling pipe, and the cooling portion is arranged in the compressor.
Preferably, the cooling device comprises an input pipe and a delivery pipe, a first control valve is arranged between the condenser and the evaporator, and a second control valve is arranged between the evaporator and the compressor; the cooling portion passes through the input tube with first control valve is connected, cooling portion passes through the eduction tube with the second control valve is connected.
Preferably, the air conditioner further comprises a throttling device, the throttling device comprises a push rod, a braking assembly and a circulating assembly, the circulating assembly is of a hollow structure, the evaporator and the condenser are communicated with the circulating assembly through a pipeline, a circulating hole is formed in the circulating assembly, the push rod penetrates through the circulating hole and is arranged in the circulating assembly, and the braking assembly is fixedly connected with the push rod; the push rod comprises an adjusting part, and the adjusting part and the circulation hole are matched.
Preferably, the brake assembly comprises a temperature sensor, a pressure sensor, a brake and a controller, wherein the temperature sensor is arranged on the delivery pipe, the evaporator and the compressor, and the pressure sensor is arranged on the compressor, the input pipe and the throttling device; the controller is in data connection with the temperature sensor, the pressure sensor and the brake, and the brake is connected with the push rod.
Preferably, the clearance area of the adjusting part and the flow hole is adjusted by the brake assembly, and the calculation formula of the clearance area S is as follows
Figure GDA0002356955090000021
Wherein T is the evaporation temperature of the refrigeration medium; of, TΔThe superheat degree of the refrigeration medium; t is1The temperature of the refrigeration medium at the tail end of the delivery pipe; t is2The temperature of the refrigeration medium at the end of the evaporator; t is3The temperature of the refrigerant at the compressor suction; p1The pressure at the head end of the input pipe; p2The pressure at the head end of the throttling device; p3The pressure of the air suction port of the compressor; a is the initial flow area.
Preferably, the cooling portion is arranged outside the compressor, the cooling portion comprises a fixed section and a buffer section, the fixed section is communicated with the buffer end, and the fixed section is fixedly connected with the compressor.
Preferably, the fixed section is provided with a plurality of airfoil plates, the compressor is provided with a plurality of heat conduction holes, the central parts of the airfoil plates are fixedly connected with the fixed section, and two ends of the airfoil plates are inserted into the heat conduction holes and are arranged to be tightly attached to the inner wall of the compressor.
Preferably, the buffer section is a spiral structure with the diameter of the inner circle slightly larger than the diameter of the outer circle of the compressor, the buffer section is fixed on the mounting plate of the compressor, and the gap between adjacent spirals, the buffer section and the gap between the fixed sections are filled with buffer materials.
Compared with the prior art, the invention has the beneficial effects that: 1, the cooling device communicated with the refrigeration cycle is arranged to realize the cooling operation of the compressor, so that the arrangement of other devices is avoided, and the energy consumption is reduced; 2, the refrigeration medium with the heat dissipation effect of the first condensation part enters the compressor through the cooling pipe and exchanges heat with lubricant in the compressor, the heat in the compressor is absorbed to reduce the temperature of the compressor, and the liquid refrigeration medium absorbing the heat enters the second condensation part to dissipate heat again and further enters the evaporator to achieve the refrigeration effect; and 3, adjusting the flow area through setting of the calculation formula, controlling the flow rate of the refrigeration medium entering the evaporator, avoiding the accumulation of the refrigeration medium in the evaporator, and ensuring the refrigeration effect of the refrigeration system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a component connection diagram of a first embodiment of the self-regulating intelligent refrigeration system of the present invention;
FIG. 2 is a component connection diagram of a second embodiment of the self-regulating intelligent refrigeration system of the present invention;
FIG. 3 is a block diagram of the throttling device of the second embodiment of the self-regulating intelligent refrigeration system of the present invention;
fig. 4 is a block diagram of the cooling device of a third embodiment of the self-regulating intelligent refrigeration system of the present invention.
The figures in the drawings represent:
1-a compressor; 2-a condenser; 3-an evaporator; 4-a cooling device; 21-a first condensation section; 22-a second condensation section; 31-a throttling device; 41-cooling pipe; 42-a cooling part; 43-input tube; 44-a delivery pipe; 45-a first control valve; 46-a second control valve; 47-a stationary section; 48-a buffer section; 311-a push rod; 312-a brake assembly; 313-a flow-through module; 314-flow-through holes; 315-an adjustment section; .
Detailed Description
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
Example one
The self-regulation intelligent refrigeration system comprises a compressor 1, a condenser 2, an evaporator 3 and a cooling device 4, wherein the compressor 1, the condenser 2 and the evaporator 3 are connected through pipelines to form a closed loop filled with a refrigeration medium, so that the refrigeration function of the refrigeration system is realized; cooling device 4 with condenser 2 is connected, just cooling device 4 sets up in order to realize on compressor 1 right compressor 1's cooling effect.
The condenser 2 includes a first condensation portion 21 and a second condensation portion 22, and the first condensation portion 21 and the second condensation portion 22 are communicated through the cooling device 4. The cooling device 4 includes a cooling pipe 41, an inlet pipe hole and an outlet pipe hole are arranged at the bottom of the compressor 1, the cooling pipe 41 extends into the compressor 1 from the inlet pipe hole and extends out from the outlet pipe hole, so that the cooling pipe 41 is partially arranged inside the compressor 1, and the cooling pipe 41 arranged inside the compressor 1 is partially a cooling portion 42. The cooling part 42 is preferably arranged in an annular curve shape, so as to avoid interference with the internal structure of the compressor 1, and the cooling effect is improved by increasing the heat exchange contact surface; cooling portion 42 with certain distance is guaranteed to 1 inner wall of compressor, apart from the size generally 10 ~ 15mm, avoid compressor 1 causes because of mechanical shock in the course of the work 1 inner wall of compressor with cooling portion 42's collision.
The cooling pipe 41 is provided with sealing elements at the positions of the pipe inlet hole and the pipe outlet hole, and the sealing elements ensure that the contact position of the cooling pipe 41 and the shell of the compressor 1 has a good sealing effect, so that lubricating oil in the compressor 1 is prevented from leaking; the sealing element is preferably provided as an elastic material, reducing the shock effect on the cooling pipe 41 when the compressor 1 is in operation.
The cooling portion 42 is preferably arranged in the compressor lubricating oil, the lubricating oil has good heat conductivity, and the cooling of the lubricating oil can effectively cool the whole compressor 1, so that the cooling effect of the compressor 1 by the cooling device 4 is improved.
The cooling process of the self-regulating intelligent refrigeration system is specifically that the compressor 1 starts to work, the refrigeration medium in a low-pressure state and a low-temperature state is sucked, the refrigeration medium is compressed into a high-temperature high-pressure gaseous state, the gaseous refrigeration medium is transported to the condenser 2 through a pipeline, the high-temperature high-pressure gaseous refrigeration medium forms a medium-temperature high-pressure liquid state through the heat dissipation effect of the first condensation part 21, the medium-temperature high-pressure liquid refrigeration medium enters the compressor 1 through the cooling pipe 41 and exchanges heat with the lubricant in the compressor 1, the heat in the compressor 1 is absorbed to reduce the temperature of the compressor 1, the liquid refrigeration medium after absorbing the heat enters the second condensation part 22 for heat dissipation again and then enters the evaporator 3, the evaporator 3 is provided with a throttling device 31, through the throttling action of the throttling device 31, the pressure of the medium-temperature high-pressure liquid refrigeration medium in the evaporator 3 is suddenly reduced, the refrigeration medium is violently evaporated and is converted from a liquid state to a gas state, and the refrigeration medium needs to absorb a large amount of heat from the outside along with the conversion process, so that the purpose of refrigeration is achieved, and after the conversion process is completed, the refrigeration medium is sucked by the compressor 1 again, so that the next cycle process is started.
Example two
The second embodiment is further improved on the basis of the first embodiment, and is improved in that the cooling device 4 further comprises an input pipe 43 and an output pipe 44, a first control valve 45 is arranged between the condenser 2 and the evaporator 3, and a second control valve 46 is arranged between the evaporator 3 and the compressor 1; one end of the input pipe 43 is connected with the first control valve 45, and the other end is connected with the cooling part 42; one end of the delivery pipe 44 is connected with the second control valve 46, and the other end is connected with the cooling part 42; the compressor 1, the condenser 2, and the cooling device 4 constitute a cooling cycle.
The first control valve 45 controls the communication state of the condenser 2 with the evaporator 3 and the inlet pipe 43, and the second control valve 46 controls the communication state of the compressor 1 with the evaporator 3 and the outlet pipe 44. The first control valve 45 and the second control valve 46 are controlled to ensure the circulation of the cooling circulation so as to realize the cooling of the compressor 1, and the inner diameter of the pipe of the input pipe 43 is smaller than that of the pipe of the condenser 2; when the self-regulating intelligent refrigeration system is opened, the cooling cycle enters a self-cooling mode, the first control valve 45 controls the condenser 2 to be communicated with the input pipe 43, the second control valve 46 controls the compressor 1 to be communicated with the guide pipe 44, the cooling cycle is communicated, the medium-temperature high-pressure cooling medium cooled by the condenser 2 is throttled in the process of passing through the input pipe 43, so that the medium-temperature high-pressure cooling medium enters the cooling part 42, evaporates and absorbs heat due to the reduction of the pressure, the compressor 1 is cooled, and the cooling medium converted into a gaseous state in the cooling part 42 enters the compressor 1 through the guide pipe 44.
It is worth pointing out that when the refrigerant medium enters the suction pipe arranged at the suction port of the compressor 1 after evaporation and heat absorption, the refrigerant medium in the suction pipe is heated to superheated steam by heat transfer with the outside due to the influence of the length and the heat insulation degree of the suction pipe, and suction superheat is formed. The suction superheat can increase the suction temperature of the compressor 1, the specific volume of the sucked steam is increased, the unit volume refrigerating capacity is reduced, the refrigerating capacity of the compressor 1 is reduced, and the refrigerating effect of the refrigerating cycle is affected.
However, after the vapor of the refrigeration medium is overheated, the liquid impact phenomenon generated by the compressor 1 sucking the liquid refrigeration medium can be avoided, and meanwhile, the phenomenon that the actual suction amount of the compressor 1 is reduced due to the fact that the liquid refrigeration medium is heated and gasified to cause reduction of the refrigeration amount of the compressor 1 because the liquid refrigeration medium enters the compressor 1 to carry out strong heat exchange is avoided.
Therefore, the superheat degree is set in the refrigerating system to reduce the influence of the superheat of the refrigerating medium, and the superheat degree is the difference between the evaporation temperature of the refrigerating medium and the suction temperature of the compressor 1, so as to avoid the occurrence of the liquid slugging phenomenon while ensuring the maximum refrigerating capacity. The superheat degree is a set fixed value and is generally 5-10 ℃.
The self-cooling mode of the self-regulating intelligent refrigeration system is performed in the refrigeration process, the self-cooling mode is generally opened for a certain number of times within a fixed time and lasts for a certain time to ensure the cooling effect on the compressor 1, the opening and closing of the refrigeration cycle and the cooling cycle are alternately realized by controlling the opening and closing of the first control valve 45 and the second control valve 46 with set time, the detected real-time refrigeration medium temperature and the set overheating temperature are calculated by the throttling device 31 through the evaporator 3 and the mixing of the two different temperature refrigeration media through the delivery pipe 44, and the opening degree of the throttling device 31 is adjusted to control the suction state of the compressor 1 so as to ensure the temperature of the refrigeration medium sucked by the compressor 1.
The throttling device 31 is preferably set as an expansion valve, the expansion valve comprises a push rod 311, a braking component 312 and a circulating component 313, the circulating component 313 is a hollow structure, the evaporator 3 and the condenser 2 are communicated with the circulating component 313 through pipelines, a circulating hole 314 is arranged in the circulating component 313, the push rod 311 passes through the circulating hole 314 and is arranged in the circulating component 313, and the braking component 312 is fixedly connected with the push rod 311; the push rod 311 includes an adjusting portion 315, the adjusting portion 315 is disposed to be engaged with the flow hole 314, and the braking member 312 adjusts a gap between the adjusting portion 311 and the flow hole 314 by moving the push rod 311, through which the refrigerant flows in the flow member 313.
Brake subassembly 312 includes temperature-sensing ware, pressure sensors, stopper, controller, temperature-sensing ware sets up the delivery tube is terminal the evaporimeter is terminal the compressor induction port with the compressor outer wall, pressure sensors sets up the compressor induction port the input tube head end with throttling arrangement head end, the delivery tube is terminal with the evaporimeter end does respectively delivery tube 44 the evaporimeter 2 with the hookup location department of second control valve 46, the input tube head end does input tube 43 with the hookup location department of first control valve 45, throttling arrangement head end does throttling arrangement 31 with the hookup location department of first control valve 45. The controller receives real-time temperature data and real-time pressure data detected by the temperature sensor and the pressure sensor, and controls the brake to move the push rod 311, so as to ensure that a better gap is formed between the adjusting part 315 and the flow hole 314, that is, the opening degree of the expansion valve, so as to meet the flow rate of the refrigerant in the expansion valve. The cross-sectional area of the gap between the regulating portion 315 and the flow hole 314 is a flow area.
Because the actually set lengths of the evaporator pipelines and the heat preservation conditions of the pipelines are different, the flow areas of the expansion valves in the initial state have certain differences, and therefore the expansion valves need to be calibrated before the self-regulating intelligent refrigeration system is used. The specific calibration process comprises the steps of opening the self-regulating intelligent refrigeration system, and realizing the connection of the refrigeration system and the isolation of the cooling system by controlling the first control valve and the second control valve; and adjusting the expansion valve according to the detection value of the temperature of the refrigerating medium at the air suction port of the compressor, so that the temperature of the refrigerating medium at the air suction port of the compressor is higher than the evaporation temperature of the refrigerating medium by about 5 ℃, wherein the expansion valve is in an initial state, and the flow area of the expansion valve in the initial state is the initial flow area.
The flow area S adjusted by the brake assembly is calculated as,
Figure GDA0002356955090000081
wherein T is the evaporation temperature of the refrigeration medium; of, TΔThe superheat degree of the refrigeration medium; t is1The temperature of the refrigeration medium at the tail end of the delivery pipe; t is2The temperature of the refrigeration medium at the end of the evaporator; t is3The temperature of the refrigerant at the compressor suction; p1The pressure at the head end of the input pipe; p2The pressure at the head end of the throttling device; p3The pressure of the air suction port of the compressor; a is the initial flow area.
Adjusting the flow area by setting the calculation formula, wherein when the self-regulating intelligent refrigeration system enters a self-cooling mode, the pressure at the head end of the throttling device is reduced, the pressure at the head end of the input pipe is increased, and the flow area needs to be reduced to reduce the flow rate of the refrigeration medium entering the evaporator, so that the accumulation of a large amount of the refrigeration medium in the evaporator is avoided; when the self-adjusting intelligent refrigerating system enters a refrigerating mode, the pressure at the head end of the throttling device is increased, the pressure at the head end of the input pipe is reduced, and the flow area needs to be increased to ensure the refrigerating effect of the refrigerating system; when the temperature of the refrigeration medium at the tail end of the delivery pipe and the temperature of the refrigeration medium at the tail end of the evaporator are increased, the flow area is increased to supplement enough refrigeration medium so as to ensure that the temperature of the superheated steam sucked by the compressor is reduced.
In the process of entering the self-cooling mode or the refrigeration mode, due to the sealing effect of the second control valve, part of the refrigeration medium in the evaporation part or the guide-out pipe cannot pass through the second control valve within a certain time, so that a strong overheating effect is generated.
EXAMPLE III
The third embodiment is further improved on the basis of the first embodiment, and is improved in that the cooling device 4 is arranged outside the compressor 1, and the cooling pipe 4 comprises a fixed section 47 and a buffer section 48; the lower part of the compressor 1 is generally configured as a cylinder, so the fixed section 47 is preferably configured as a ring, and the inner circle diameter size is equal to the outer circle diameter size of the compressor 1, and the length size is preferably configured as 3/4 the length of the outer circumference of the compressor 1; the fixed section 47 is arranged at the upper part of the buffer section 48, the fixed section 47 is provided with a plurality of airfoil plates, the compressor 1 is provided with a plurality of heat conduction holes, the airfoil plates and the heat conduction holes are correspondingly arranged, the central parts of the airfoil plates are fixedly connected with the fixed section, two ends of the airfoil plates are inserted into the heat conduction holes and are arranged in a manner of being tightly attached to the inner wall of the compressor 1, and sealing materials are adopted between the airfoil plates and the heat conduction holes for sealing to ensure the sealing performance of the compressor 1; the wing-shaped plate is preferably made of materials with good heat conduction, such as aluminum, copper and the like, so that the cooling effect of the fixed section on the interior of the compressor through the wing-shaped plate is ensured; the fixing section 47 is fixed on the outer wall of the compressor 1 through the arrangement of the wing-shaped plates, so that the stable connection state of the cooling pipe 41 and the compressor 1 is ensured.
The buffer section 48 is set to be a spiral structure with the inner circle diameter slightly larger than the outer circle diameter of the compressor 1, so that the buffer section 48 is prevented from colliding with the outer wall of the compressor 1; the bottom of the buffer section 48 is fixed on the mounting plate of the compressor 1, and the gaps between adjacent spirals, the buffer section 48 and the fixed section 47 are filled with buffer materials.
The cooling process of the self-regulating intelligent refrigeration system is specifically that the compressor 1 starts to work, the refrigeration medium in a low-pressure state and a normal-temperature state is sucked, the refrigeration medium is compressed into a high-temperature high-pressure gaseous state, the gaseous refrigeration medium is transported to the condenser 2 through a pipeline, the high-temperature high-pressure gaseous refrigeration medium forms a medium-temperature high-pressure liquid state through the heat dissipation effect of the first condensation part 21, the medium-temperature high-pressure liquid refrigeration medium exchanges heat with the outer wall of the compressor 1 through the fixed section 47 to reduce the temperature of the outer wall of the compressor 1, enters the buffer section 48 and then exchanges heat with air in the lower space of the compressor 1 to ensure that the lower temperature of the compressor 1 is in a lower-temperature state, so that the compressor 1 is cooled, the liquid refrigeration medium absorbing heat enters the second condensation part 22 to dissipate heat again and further enters the evaporator 3, through the throttling action of the throttling device 31, the pressure of the medium-temperature high-pressure liquid refrigeration medium in the evaporator 3 is suddenly reduced, the refrigeration medium is violently evaporated and is converted from a liquid state to a gas state, and the refrigeration medium needs to absorb a large amount of heat from the outside along with the conversion process, so that the purpose of refrigeration is achieved, and after the conversion process is completed, the refrigeration medium is sucked by the compressor 1 again, so that the next cycle process is started.
When the compressor 1 is in an operating state, the compressor 1 as a whole may vibrate due to the influence of the internal structure of the compressor 1. The temperature of the compressor 1 is reduced by the structural arrangement of the cooling device in the self-regulating intelligent refrigeration system, by the direct cooling manner that the refrigeration medium is directly heat exchanged with the outer wall of the compressor 1 at the fixed section 47, and by the indirect cooling manner that the low-temperature environment formed by the low part of the compressor 1 in the buffer section 48 is acted on and heat exchanged with the compressor 1; the overall spiral structure of the buffer section 48 is arranged to reduce the vibration amplitude of the compressor 1 during working, the buffer material arranged in the gap ensures that the overall structure of the buffer section 48 is stable and simultaneously absorbs the vibration stress of the compressor 1 and the cooling pipe 42, and the adverse effect of the vibration on the overall stability of the self-adjusting intelligent refrigeration system is reduced.
The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (3)

1. The self-regulating intelligent refrigerating system is characterized by comprising a compressor, a condenser, an evaporator and a cooling device, wherein the compressor, the condenser and the evaporator are connected through pipelines to form a closed loop filled with a refrigerating medium; the cooling device is connected with the condenser and comprises a cooling part, and the cooling part is arranged on the compressor to realize the cooling effect on the compressor; the cooling device comprises an input pipe and an outlet pipe, the cooling part is connected between the condenser and the evaporator through the input pipe, and the cooling part is connected between the evaporator and the compressor through the outlet pipe;
the evaporator and the condenser are communicated with the circulation assembly through a pipeline, a circulation hole is formed in the circulation assembly, the push rod penetrates through the circulation hole and is arranged in the circulation assembly, and the brake assembly is fixedly connected with the push rod; the push rod comprises an adjusting part, and the adjusting part is matched with the flow hole;
the clearance area of the adjusting part and the flow hole is adjusted through the brake assembly, and the calculation formula of the clearance area S is as follows:
Figure FDA0002445539080000011
wherein T is the evaporation temperature of the refrigeration medium; t isΔThe superheat degree of the refrigeration medium; t is1The temperature of the refrigeration medium at the tail end of the delivery pipe; t is2The temperature of the refrigeration medium at the end of the evaporator; t is3The temperature of the refrigerant at the compressor suction; p1The pressure at the head end of the input pipe; p2The pressure at the head end of the throttling device; p3The pressure of the air suction port of the compressor; a is the initial flow area.
2. A self-regulating intelligent refrigeration system as recited in claim 1 wherein a first control valve is disposed between said condenser and said evaporator and a second control valve is disposed between said evaporator and said compressor; the cooling portion passes through the input tube with first control valve is connected, cooling portion passes through the eduction tube with the second control valve is connected.
3. The self-regulating intelligent refrigeration system of claim 1 wherein said brake assembly comprises a temperature sensor, a pressure sensor, a brake, a controller, said temperature sensor disposed on said delivery line, said evaporator and said compressor, said pressure sensor disposed on said compressor, said inlet line and said throttling device; the controller is in data connection with the temperature sensor, the pressure sensor and the brake, and the brake is connected with the push rod.
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Publication number Priority date Publication date Assignee Title
JPH04287876A (en) * 1991-03-15 1992-10-13 Hitachi Ltd Closed type compressor
CN2314309Y (en) * 1997-12-24 1999-04-14 泰州市电器厂 Electronic expansion valve for household air conditioner
CN101285615A (en) * 2008-05-05 2008-10-15 苏权兴 Compressor
BRPI1100416A2 (en) * 2011-02-22 2013-12-03 Whilrpool S A COMPRESSOR COOLING SYSTEM USING PRE-CONDENSER, AND COMPRESSOR PROVIDED OF COOLING SYSTEM
US10047987B2 (en) * 2013-02-05 2018-08-14 Emerson Climate Technologies, Inc. Compressor cooling system
CN105683685B (en) * 2013-10-31 2019-01-01 艾默生环境优化技术有限公司 heat pump system
CN204923543U (en) * 2015-08-03 2015-12-30 Tcl空调器(中山)有限公司 Air conditioner
CN205561324U (en) * 2016-01-28 2016-09-07 苏州必信空调有限公司 Refrigerating system

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