CN114111130A - Automobile refrigeration thermostatic expansion valve based on sectional type heat exchange structure - Google Patents

Automobile refrigeration thermostatic expansion valve based on sectional type heat exchange structure Download PDF

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Publication number
CN114111130A
CN114111130A CN202111345967.XA CN202111345967A CN114111130A CN 114111130 A CN114111130 A CN 114111130A CN 202111345967 A CN202111345967 A CN 202111345967A CN 114111130 A CN114111130 A CN 114111130A
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module
expansion valve
data
temperature
air
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CN114111130B (en
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陈国燕
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Sanhe Tongfei Refrigeration Co ltd
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Individual
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/36Expansion valves with the valve member being actuated by bimetal elements or shape-memory elements influenced by fluids, e.g. by the refrigerant

Abstract

The invention discloses an automobile refrigeration thermal expansion valve based on a sectional type heat exchange structure, which comprises a detection device and an expansion valve post-processing system, wherein the detection device comprises a processing table, a main control box is arranged at the left side of the processing table, a positioning hole is arranged in the middle of the processing table, an expansion valve is arranged above the positioning hole, a first connector, a second connector and a third connector are respectively arranged on the surface of the expansion valve, a temperature sensing bag is connected with an upper end pipeline of the expansion valve, support plates are arranged at two sides of the expansion valve, the support plates are fixed on the upper surface of the processing table, an air rod is respectively arranged at one side of each support plate close to the expansion valve, a fixture block is fixed at the front end of each air rod, an air pump is connected with an inner pipeline of each air rod, a condenser is arranged below the processing table, and a liquid storage dryer is connected with one end pipeline of the condenser, the method has the characteristics of strong practicability and capability of changing the angle according to the detection result.

Description

Automobile refrigeration thermostatic expansion valve based on sectional type heat exchange structure
Technical Field
The invention relates to the technical field of valve production, in particular to an automobile refrigeration thermostatic expansion valve based on a sectional type heat exchange structure.
Background
The thermostatic expansion valve controls the opening degree of the expansion valve through the superheat degree of gaseous refrigerant at the outlet of the evaporator, so the thermostatic expansion valve is widely applied to a non-flooded evaporator, the thermostatic expansion valve can be divided into an internal balanced type and an external balanced type according to different balance modes, different substances and modes can be adopted in a temperature sensing system of the thermostatic expansion valve for filling, the main modes comprise a liquid filling mode, an inflatable type, a cross liquid filling mode, a mixed filling mode and an adsorption filling mode, but the superheat degree plays a role in improving the normal operation of the expansion valve, the superheat degree refers to the temperature difference between steam at a low pressure side and in a temperature sensing bag, and is higher or lower, so the refrigeration process is not favorably executed, and therefore, the superheat degree of the expansion valve is detected and the spring adjustment in the expansion valve is made. Therefore, it is necessary to design a vehicle refrigeration thermostatic expansion valve based on a sectional type heat exchange structure, which has strong practicability and can change the angle according to the detection result.
Disclosure of Invention
The invention aims to provide an automobile refrigeration thermostatic expansion valve based on a sectional type heat exchange structure, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: an automobile refrigeration thermostatic expansion valve based on a sectional type heat exchange structure comprises a detection device and an expansion valve post-processing system, wherein the detection device comprises a processing table, a main control box is arranged on the left side of the processing table, a positioning hole is formed in the middle of the processing table, an expansion valve is arranged above the positioning hole, a first interface, a second interface and a third interface are respectively arranged on the surface of the expansion valve, a temperature sensing bag is connected to an upper end pipeline of the expansion valve, support plates are arranged on two sides of the expansion valve and fixed to the upper surface of the processing table, an air rod is arranged on one side, close to the expansion valve, of each support plate, a fixture block is fixed to the front end of each air rod, an air pump is connected to an inner pipeline of each air rod, a condenser is arranged below the processing table, a liquid storage dryer is connected to a pipeline at one end of each condenser, and the inside of each liquid storage dryer is communicated with the second interface, one side of stock solution desicator is provided with the air-blower, the right side of processing platform is provided with the evaporimeter, the air-blower is located the left side of evaporimeter, the left side of expansion valve is provided with air condition compressor, air condition compressor's inside one end and an interface pipe connection, air condition compressor's the inside other end and the other end pipe connection of condenser, the one end and the three pipe connection of interface of evaporimeter, the temperature sensing package is installed in the other end department of evaporimeter, one side of temperature sensing package is close to pipeline department and is provided with the thermometer, the opposite side of temperature sensing package is provided with the temperature and pressure conversion table.
According to the technical scheme, the inside and the master control case signal connection of warm-pressing conversion table, the top of interface two is provided with adjusting screw, adjusting screw and the inside threaded connection of expansion valve, adjusting screw's external connection dwang, one side of air condition compressor is provided with the hydraulic cylinder, the hydraulic cylinder is fixed in on the processing bench, the inside sliding connection of hydraulic cylinder has the piston rod, the one end fixedly connected with cope match-plate pattern of piston rod, hinged joint has the connecting rod on the upper surface of cope match-plate pattern, the other end of connecting rod and the other end hinged joint of dwang, the below of cope match-plate pattern is fixed with the compression piece, the right side of compression piece is fixed with the transmitter on the surface, be provided with the scanner in the right side direction of transmitter, the scanner is installed on the processing bench.
According to the technical scheme, the expansion valve post-processing system comprises a detection module, a data processing module, an adjusting module and a quality evaluation module, wherein the detection module comprises a system start-stop module, a segmentation simulation module and a temperature difference acquisition module, the data processing module comprises a data entry module, a logic comparison module, a steering judgment module and a corner determining module, the adjusting module comprises a command execution module and a secondary verification module, and the quality evaluation module comprises a scanning recording module, a data calling module and a qualified calculation module;
the detection module is in signal connection with the data processing module, the data processing module is in signal connection with the adjustment module, the expansion valve post-processing system is electrically connected with the main control box, the detection module is used for detecting whether the superheat degree measured by the expansion valve during normal work meets a normal work standard, the data processing module is used for receiving data and determining a steering angle, the adjustment module is used for receiving the data obtained by the data processing module, executing instructions according to the data, detecting the second superheat degree of the improved expansion valve, and the quality evaluation module is used for comprehensively evaluating the quality of a batch of detected expansion valves.
According to the technical scheme, the operation steps of the post-treatment processing system of the expansion valve are as follows:
s1: extracting a plurality of expansion valves from a produced batch of expansion valves to detect superheat degree, installing the expansion valves between clamping blocks of an air rod, and allowing air to enter the air rod and clamping the expansion valves;
s2: the system starting and stopping module is used for starting the main control box, the segmented simulation module is used for simulating the air-conditioning refrigeration environment, a plurality of temperature external simulations are set to collect data, and the collected data are transmitted to the data processing module;
s3: the data processing module is used for carrying out data acquisition on the temperature difference, a reasonable superheat degree is recorded in the data recording module, the interval range is [5, 8], and the logic comparison module is used for comparing the acquired data with the interval range;
s4: the logic comparison module is used for comparing the detected superheat degree of the expansion valve and analyzing the comparison result, so that the steering judgment module is used for controlling the liquid inlet and outlet judgment in the hydraulic cylinder, and the corner determination module is used for calculating the liquid inlet and outlet quantity;
s5: the command execution module collects data obtained by the steering judgment module and the corner determination module, and controls the liquid inlet and outlet in the hydraulic cylinder according to the obtained data, so as to control the compression amount of a spring in the expansion valve body;
s6: after the liquid inlet and outlet instruction is finished, the secondary verification module enables the segmented simulation module to perform simulation detection of the multi-temperature refrigeration environment on the improved expansion valve again, and the working step of S is repeated;
s7: if the detected superheat degree accords with the interval range, the system stops operating, the detected and improved expansion valve is taken down, the next expansion valve to be detected is installed between the clamping blocks and is detected, S1-S6 is repeated, and if the detected superheat degree does not accord with the interval range, the steps of S5-S6 are repeated again until the secondary verification module obtains a reasonable superheat degree;
s8: and when all the selected expansion valves in the batch are detected and improved, a quality evaluation module in the system performs comprehensive quality evaluation on the expansion valves produced in the batch.
According to the technical scheme, the working steps of S2 are as follows:
s21: after the installation of the expansion valve and the installation of the related interface are finished, the system is started, the whole device carries out a refrigeration environment module, and the evaporator and the blower start to work;
s22: under the action of the expansion valve, after the expansion valve throttles and controls the amount of the high-temperature and high-pressure refrigerant, the refrigerant is changed into a low-temperature and low-pressure gaseous substance, so that the environment is refrigerated;
s23: the thermometer and the temperature-pressure converter in the refrigeration process are both electrically connected with the temperature difference acquisition module, and the temperature detected by the thermometer is marked as T1And the temperature mark T corresponding to the pressure detected by the temperature-pressure conversion table2The superheat is marked as R, i.e. R ═ T1-T2
S24: the temperature acquisition module transmits the acquired data R to a data recording module in the data processing module.
According to the technical scheme, the working steps of S3 are as follows:
s31: according to the formula R ═ T1-T2A value of the degree of superheat R can be determined, a logical comparison module compares R to values within the interval range, and the difference in the ratio is denoted as W, where W is-Expressed as the degree of superheat found being below the minimum value of the interval, W+Expressed as the calculated degree of superheat is higher than the interval maximum;
s32: calculating a specific difference of the obtained superheat degree, wherein W-R-5 |, W+And R-8, and transmitting the ratio difference data to a steering judgment module and a steering angle determination module.
According to the technical scheme, the working steps of S4 are as follows:
s41: the turning angle judging module judges whether the liquid in and out of the hydraulic cylinder is fed according to the received positive and negative signs of the lower right corner of the ratio difference, if the liquid is displayed as a negative sign, the upper cavity in the hydraulic cylinder discharges liquid, the piston rod drives the upper template to move upwards, meanwhile, the upper template drives the connecting rod to ascend and enables the rotating rod to rotate, further, the adjusting screw rotates clockwise, the internal spring force is increased to reduce the opening degree of the expansion valve, and if the liquid is displayed as a positive sign, the working principles are opposite;
s42: when the upper template moves up and down, the compression block below the upper template stretches or compresses along with the upper template, the emitter moves up and down along with the compression block, the scanner receives signals sent by the emitter, the moving distance L of the upper template is further indirectly obtained, and the rotation angle determining module obtains the rotation angle theta of the adjusting screw by controlling the L;
s43: after the specific difference W, the sign and the theta thereof are known, the data processing module obtains the liquid inlet and outlet quantity Q and transmits the data to the adjusting module.
According to the technical scheme, the formula of the liquid inlet and outlet amount calculated by the corner determining module is as follows:
Q=Q0*L
wherein L is the moving distance of the upper template, Q0The relationship between θ and L is known as the amount of liquid entering and exiting per unit distance
Figure BDA0003354114910000051
When W is larger, the value of L is larger, meanwhile, theta is proportional to L, and a is the length of the rotating rod.
According to the technical scheme, the quality evaluation module comprises the following operation steps:
s81: after the expansion valves are detected, the scanning and recording module records the moving times of the emitter and transmits the data to the qualified computing module;
s82: the data calling module calls the relevant detection data of the expansion valve and transmits the data to the qualified calculation module;
s83: and the qualified computing module performs comprehensive computation on the quality of the batch of expansion valves.
According to the technical scheme, the quality evaluation formula in the qualified calculation module is as follows:
Figure BDA0003354114910000052
wherein n is the total number of the extracted expansion valves, and C represents the moving times of the upper template during the detection of the corresponding expansion valve.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, by arranging the expansion valve post-processing system, on one hand, superheat degree detection can be carried out on the expansion valve, and on the other hand, the angle change of the adjusting screw rod is carried out through superheat degree detection, so that the internal opening degree is improved, and a better refrigeration effect is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic left side view of the present invention;
FIG. 3 is a partially enlarged view of region A of the present invention;
FIG. 4 is a schematic view of an expansion valve interface of the present invention;
FIG. 5 is a schematic diagram of the system of the present invention;
in the figure: 1. a master control box; 2. a processing table; 3. a scanner; 4. an expansion valve; 5. a support plate; 6. a gas lever; 7. a condenser; 8. a liquid storage dryer; 9. a blower; 10. an evaporator; 11. a thermometer; 12. a temperature sensing bulb; 13. a warm-pressure conversion table; 14. mounting a template; 15. rotating the rod; 16. adjusting the screw; 17. an air conditioning compressor; 18. a hydraulic cylinder; 19. a connecting rod; 20. compressing the block; 21. a transmitter; 22. an interface I; 23. interface two; 24. and a third interface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides the following technical solutions: a car refrigeration thermal expansion valve based on a sectional type heat exchange structure comprises a detection device and an expansion valve post-processing system, wherein the detection device comprises a processing table 2, a main control box 1 is arranged on the left side of the processing table 2, a positioning hole is formed in the middle of the processing table 2, an expansion valve 4 is arranged above the positioning hole, a first connector 22, a second connector 23 and a third connector 24 are respectively arranged on the surface of the expansion valve 4, a temperature sensing bag 12 is connected to an upper end pipeline of the expansion valve 4, support plates 5 are arranged on two sides of the expansion valve 4, the support plates 5 are fixed on the upper surface of the processing table 2, an air rod 6 is respectively arranged on one sides, close to the expansion valve 4, of the support plates 5, a fixture block is fixed at the front end of the air rod 6, an air pump is connected to an internal pipeline of the air rod 6, a condenser 7 is arranged below the processing table 2, a liquid storage dryer 8 is connected to one end pipeline of the condenser 7, and the interior of the liquid storage dryer 8 is communicated with the second connector 23, an air blower 9 is arranged on one side of a liquid storage dryer 8, an evaporator 10 is arranged on the right side of a processing table 2, the air blower 9 is positioned on the left side of the evaporator 10, an air-conditioning compressor 17 is arranged on the left side of an expansion valve 4, one end of the interior of the air-conditioning compressor 17 is connected with a first interface 22 through a pipeline, the other end of the interior of the air-conditioning compressor 17 is connected with the other end of a condenser 7 through a pipeline, one end of the evaporator 10 is connected with a third interface 24 through a pipeline, a temperature sensing bulb 12 is installed at the other end of the evaporator 10, a thermometer 11 is arranged on one side of the temperature sensing bulb 12 close to the pipeline, a temperature and pressure conversion table 13 is arranged on the other side of the temperature sensing bulb 12, the expansion valve 4 is positioned on a positioning hole, the expansion valve is clamped by a clamping block, the superheat degree detection of the expansion valve 4 is carried out, the air-conditioning compressor 17 and the air blower 9 are started by a main control box 1, high-temperature and high-pressure liquid in the pipeline passes through the interior of the condenser 7 and the liquid storage dryer 8 under the influence of the external environment, the refrigerant becomes liquid refrigerant, then enters the evaporator 10 through the inside of the expansion valve 4 and the interface III 24, under the action of the expansion valve 4, the liquid refrigerant becomes low-temperature low-pressure fog-like hydraulic refrigerant after passing through the throttling action of the expansion valve 4, a condition is created for the evaporation of the refrigerant, the liquid refrigerant entering the evaporator 10 is evaporated from liquid state to gas state, heat absorption is carried out, a refrigeration environment is formed, low-temperature low-pressure gas passing through the evaporator 10 passes through the inside of the air-conditioning compressor 17 to become high-temperature high-pressure gas, then becomes high-temperature high-pressure liquid, the processes are repeated, an environmental refrigeration system is formed, the temperature sensing bulb 12 is directly positioned in the refrigerant gas flow at the outlet of the evaporator 10, the refrigeration temperature at the evaporator 10 is detected by the temperature sensing bulb 11, the temperature and pressure conversion table 13 detects the evaporation pressure at the position close to the temperature sensing bulb 12 and converts the degree into temperature, the degree of superheat is then calculated.
The interior of the temperature and pressure conversion table 13 is in signal connection with the main control box 1, an adjusting screw 16 is arranged above the second interface 23, the adjusting screw 16 is in threaded connection with the interior of the expansion valve 4, the exterior of the adjusting screw 16 is connected with a rotating rod 15, one side of an air-conditioning compressor 17 is provided with a hydraulic cylinder 18, the hydraulic cylinder 18 is fixed on the processing table 2, the interior of the hydraulic cylinder 18 is in sliding connection with a piston rod, one end of the piston rod is fixedly connected with an upper template 14, the upper surface of the upper template 14 is hinged with a connecting rod 19, the other end of the connecting rod 19 is hinged with the other end of the rotating rod 15, a compression block 20 is fixed below the upper template 14, the right side surface of the compression block 20 is fixed with an emitter 21, a scanner 3 is arranged on the right side direction of the emitter 21, the scanner 3 is arranged on the processing table 2, and the compression degree of a spring in the expansion valve 4 is adjusted according to the detected superheat degree, if the expansion valve 4 for the automobile adopts a pressure bar type expansion valve, the compression amount of an internal spring can be changed only by adjusting an external adjusting screw, when liquid enters a hydraulic cylinder 18 on a processing table 2, a piston rod drives an upper template 14 to move downwards, a connecting rod 19 moves downwards along with the upper template 14 and drives a rotating rod 15 to rotate, under the action of the rotating rod 15, an adjusting screw 16 rotates reversely, the internal spring force is reduced, the opening degree of the expansion valve 4 is increased, if liquid is discharged from the interior of the hydraulic cylinder 18, the above procedures are opposite, the opening degree of the expansion valve 4 is reduced, and thus the expansion valve 4 with the superheat degree not meeting the standard can be effectively adjusted in the opening degree.
The expansion valve post-processing system comprises a detection module, a data processing module, an adjusting module and a quality evaluation module, wherein the detection module comprises a system start-stop module, a segmentation simulation module and a temperature difference acquisition module, the data processing module comprises a data entry module, a logic comparison module, a steering judgment module and a corner determination module, the adjusting module comprises a command execution module and a secondary verification module, and the quality evaluation module comprises a scanning recording module, a data calling module and a qualified calculation module;
the detection module is in signal connection with the data processing module, the data processing module is in signal connection with the adjustment module, the expansion valve post-processing system is electrically connected with the main control box 1, the detection module is used for detecting whether the superheat degree measured by the expansion valve 4 in normal work meets the normal work standard or not, the data processing module is used for receiving data and determining a steering angle, the adjustment module is used for receiving the data obtained by the data processing module and executing instructions according to the data, secondary superheat degree detection is carried out on the improved expansion valve 4, and the quality evaluation module is used for carrying out comprehensive quality evaluation on a batch of detected expansion valves 4.
The operation steps of the post-processing system of the expansion valve are as follows:
s1: extracting a plurality of expansion valves 4 from a produced batch of expansion valves 4 to detect superheat degree, installing the expansion valves 4 between fixture blocks of an air rod 6, and allowing air to enter the air rod 6 and clamping the expansion valves 4;
s2: the system starting and stopping module is used for starting the main control box 1, the segmented simulation module is used for simulating the air-conditioning refrigeration environment, data acquisition is carried out by setting a plurality of temperature external simulations, and the acquired data are transmitted to the data processing module;
s3: the data processing module is used for carrying out data acquisition on the temperature difference, a reasonable superheat degree is recorded in the data recording module, the interval range is [5, 8], and the logic comparison module is used for comparing the acquired data with the interval range;
s4: the logic comparison module compares the detected superheat degree of the expansion valve 4 and analyzes the comparison result, so that the steering judgment module controls the liquid inlet and outlet judgment in the hydraulic cylinder 18 and the corner determination module calculates the liquid inlet and outlet quantity;
s5: the command execution module collects data obtained by the steering judgment module and the corner determination module, and controls the liquid inlet and outlet in the liquid cylinder 18 according to the obtained data, so as to control the compression amount of a spring in the valve body of the expansion valve 4;
s6: after the liquid inlet and outlet instruction is finished, the secondary verification module enables the segmented simulation module to perform simulation detection of the multi-temperature refrigeration environment on the improved expansion valve 4 again, and the working step of S3 is repeated;
s7: if the detected superheat degree accords with the interval range, stopping the system, taking down the detected and improved expansion valve 4, installing the next expansion valve 4 to be detected between the clamping blocks, detecting, repeating S1-S6, and if the detected superheat degree does not accord with the interval range, repeating the steps of S5-S6 again until the secondary verification module obtains a reasonable superheat degree;
s8: when all the selected expansion valves 4 in the batch are detected and improved, a quality evaluation module in the system performs comprehensive quality evaluation on the expansion valves 4 produced in the batch.
The working steps of S2 are as follows:
s21: after the expansion valve 4 and the related interfaces are installed, the system is started, the whole device carries out a refrigeration environment module, and the evaporator 10 and the blower 9 start to work;
s22: under the action of the expansion valve 4, after the expansion valve 4 throttles and controls the amount of the high-temperature and high-pressure refrigerant, the refrigerant is changed into a low-temperature and low-pressure gaseous substance, so that the environment is refrigerated;
s23: the thermometer 11 and the temperature-pressure converter 13 in the refrigeration process are both electrically connected with the temperature difference acquisition module, and the temperature detected by the thermometer 11 is marked as T1The pressure-corresponding temperature detected by the temperature-pressure conversion table 13 is marked as T2The degree of superheat is denoted as R, i.e. R ═ T1-T2
S24: the temperature acquisition module transmits the acquired data R to a data recording module in the data processing module.
The working steps of S3 are as follows:
s31: according to the formula R ═ T1-T2A value of the degree of superheat R can be determined, a logical comparison module compares R to values within the interval range, and the difference in the ratio is denoted as W, where W is-Expressed as the calculated degree of superheat being below the interval minimum value of 5, W+Expressed as the calculated degree of superheat is higher than the interval maximum value 8;
s32: calculating the obtained superheat degree by a ratio difference, wherein W-=|R-5|,W+And R-8, and transmitting the ratio difference data to a steering judgment module and a steering angle determination module.
The working steps of S4 are as follows:
s41: the turning angle judging module judges whether the liquid in and out of the liquid cylinder 18 is fed according to the received plus or minus sign of the lower right corner of the ratio difference, if the sign is negative, the upper cavity in the liquid cylinder 18 discharges liquid, the piston rod drives the upper template 14 to move upwards, meanwhile, the upper template 14 drives the connecting rod 19 to ascend and the rotating rod 15 to rotate, so that the adjusting screw 16 rotates clockwise, the internal spring force is increased to reduce the opening degree of the expansion valve 4, and if the sign is positive, the working principles are opposite;
s42: when the upper template 14 moves up and down, the compression block 20 below the upper template is stretched or compressed along with the upper template 14, the emitter 21 moves up and down along with the compression block 20, the scanner 3 receives signals sent by the emitter 21, the moving distance L of the upper template 14 is indirectly obtained, and the rotation angle determining module obtains the rotation angle theta of the adjusting screw 16 by controlling the L;
s43: after the specific difference W, the sign and the theta thereof are known, the data processing module obtains the liquid inlet and outlet quantity Q and transmits the data to the adjusting module.
The formula of the liquid inlet and outlet amount calculated by the corner determining module is as follows:
Q=Q0*L
wherein L is the moving distance of the upper die plate 14, Q0The relationship between θ and L is known as the amount of liquid entering and exiting per unit distance
Figure BDA0003354114910000101
The larger W, the larger L, and θ is proportional to L, where a is the length of the rotating lever 15.
The operation steps of the quality evaluation module are as follows:
s81: after the expansion valves 4 are detected, the scanning and recording module records the moving times of the emitter 21 and transmits the data to the qualified computing module;
s82: the data calling module calls the relevant detection data of the expansion valve 4 and transmits the data to the qualified calculation module;
s83: and the qualified computing module performs comprehensive computation on the quality of the batch of expansion valves 4.
The quality evaluation formula in the qualified calculation module is as follows:
Figure BDA0003354114910000111
where n is the total number of the extracted expansion valves 4, and C represents the number of times the upper die plate 14 moves when the corresponding expansion valve 4 is detected.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an automobile refrigeration thermal expansion valve based on sectional type heat transfer structure, includes detection device and expansion valve aftertreatment system of processing which characterized in that: the detection device comprises a processing table (2), a main control box (1) is arranged on the left side of the processing table (2), a positioning hole is formed in the middle of the processing table (2), an expansion valve (4) is installed above the positioning hole, a first connector (22), a second connector (23) and a third connector (24) are respectively formed in the surface of the expansion valve (4), a temperature sensing bag (12) is connected to an upper end pipeline of the expansion valve (4), support plates (5) are arranged on two sides of the expansion valve (4), the support plates (5) are fixed on the upper surface of the processing table (2), an air rod (6) is installed on one side, close to the expansion valve (4), of each support plate (5), clamping blocks are fixed at the front end of each air rod (6), an air pump is connected to an inner pipeline of each air rod (6), a condenser (7) is arranged below the processing table (2), the one end pipe connection of condenser (7) has receiver drier (8), the inside and the interface two (23) of receiver drier (8) communicate with each other, one side of receiver drier (8) is provided with air-blower (9), the right side of processing platform (2) is provided with evaporimeter (10), air-blower (9) are located the left side of evaporimeter (10), the left side of expansion valve (4) is provided with air condition compressor (17), the inside one end and the interface one (22) pipe connection of air condition compressor (17), the inside other end and the other end pipe connection of condenser (7) of air condition compressor (17), the one end and the interface three (24) pipe connection of evaporimeter (10), temperature sensing package (12) are installed in the other end department of evaporimeter (10), one side of temperature sensing package (12) is close to pipeline department and is provided with thermometer (11), and a temperature-pressure conversion table (13) is arranged on the other side of the thermal bulb (12).
2. The automobile refrigeration thermal expansion valve based on the sectional type heat exchange structure as claimed in claim 1, wherein: the inside and the master control case (1) signal connection of warm-pressure conversion table (13), the top of interface two (23) is provided with adjusting screw (16), adjusting screw (16) and the inside threaded connection of expansion valve (4), the external connection dwang (15) of adjusting screw (16), one side of air condition compressor (17) is provided with hydraulic cylinder (18), hydraulic cylinder (18) are fixed in on processing platform (2), the inside sliding connection of hydraulic cylinder (18) has the piston rod, the one end fixedly connected with cope match-plate pattern (14) of piston rod, hinged joint has connecting rod (19) on the upper surface of cope match-plate pattern (14), the other end of connecting rod (19) and the other end hinged joint of dwang (15), the below of cope match-plate pattern (14) is fixed with compression piece (20), be fixed with emitter (21) on the right side surface of compression piece (20), the device is characterized in that a scanner (3) is arranged on the right side direction of the emitter (21), and the scanner (3) is installed on the processing table (2).
3. The automobile refrigeration thermal expansion valve based on the sectional type heat exchange structure as claimed in claim 2, wherein: the expansion valve post-processing system comprises a detection module, a data processing module, an adjusting module and a quality evaluation module, wherein the detection module comprises a system start-stop module, a segmentation simulation module and a temperature difference acquisition module, the data processing module comprises a data entry module, a logic comparison module, a steering judgment module and a corner determining module, the adjusting module comprises a command execution module and a secondary verification module, and the quality evaluation module comprises a scanning recording module, a data calling module and a qualified calculation module;
the detection module is in signal connection with the data processing module, the data processing module is in signal connection with the adjustment module, the expansion valve post-processing system is electrically connected with the main control box (1), the detection module is used for detecting whether the superheat degree measured by the expansion valve (4) meets the normal working standard when the expansion valve works normally, the data processing module is used for receiving data and determining a steering angle, the adjustment module is used for receiving the data obtained by the data processing module and executing instructions according to the data, secondary superheat degree detection is carried out on the improved expansion valve (4), and the quality evaluation module is used for carrying out comprehensive quality evaluation on a batch of detected expansion valves (4).
4. The automobile refrigeration thermal expansion valve based on the sectional type heat exchange structure as claimed in claim 3, wherein: the operation steps of the post-treatment processing system of the expansion valve are as follows:
s1: extracting a plurality of expansion valves (4) from a produced batch of expansion valves (4) to detect superheat degree, installing the expansion valves (4) between fixture blocks of an air rod (6), and allowing air to enter the air rod (6) and clamping the expansion valves (4);
s2: the system starting and stopping module is used for starting the main control box (1), the segmented simulation module is used for simulating the air-conditioning refrigeration environment, data acquisition is carried out by setting a plurality of temperature external simulations, and the acquired data are transmitted to the data processing module;
s3: the data processing module is used for carrying out data acquisition on the temperature difference, a reasonable superheat degree is recorded in the data recording module, the interval range is [5, 8], and the logic comparison module is used for comparing the acquired data with the interval range;
s4: the logic comparison module compares the detected superheat degree of the expansion valve (4) and analyzes the comparison result, so that the steering judgment module controls the liquid inlet and outlet judgment in the hydraulic cylinder (18), and the corner determination module calculates the liquid inlet and outlet quantity;
s5: the command execution module collects data obtained by the steering judgment module and the corner determination module, and controls the liquid inlet and outlet in the hydraulic cylinder (18) according to the obtained data, so as to control the compression amount of a spring in the valve body of the expansion valve (4);
s6: after the liquid inlet and outlet instruction is finished, the secondary verification module enables the segmented simulation module to perform simulation detection of the multi-temperature refrigeration environment on the improved expansion valve (4) again, and the working step of S3 is repeated;
s7: if the detected superheat degree accords with the interval range, stopping the system, taking down the detected and improved expansion valve (4), installing the next expansion valve (4) to be detected between the clamping blocks, detecting, repeating S1-S6, and if the detected superheat degree does not accord with the interval range, repeating the steps of S5-S6 again until the secondary verification module obtains a reasonable superheat degree;
s8: and when the selected expansion valves (4) in the batch are detected and improved, a quality evaluation module in the system performs comprehensive quality evaluation on the expansion valves (4) produced in the batch.
5. The automobile refrigeration thermal expansion valve based on the sectional type heat exchange structure as claimed in claim 4, wherein: the working steps of the S2 are as follows:
s21: after the installation of the expansion valve (4) and the installation of the related interface are finished, the system is started, the whole device carries out a refrigeration environment module, and the evaporator (10) and the air blower (9) start to work;
s22: under the action of the expansion valve (4), after the expansion valve (4) throttles and controls the amount of the high-temperature and high-pressure refrigerant, the refrigerant is changed into a low-temperature and low-pressure gaseous substance, so that the environment is refrigerated;
s23: the thermometer (11) and the temperature-pressure converter (13) in the refrigeration process are both electrically connected with the temperature difference acquisition module, and the temperature detected by the thermometer (11) is marked as T1The temperature mark T corresponding to the pressure detected by the temperature-pressure conversion table (13)2The superheat is marked as R, i.e. R ═ T1-T2
S24: the temperature acquisition module transmits the acquired data R to a data recording module in the data processing module.
6. The automobile refrigeration thermostatic expansion valve based on the sectional type heat exchange structure according to claim 5, wherein: the working steps of the S3 are as follows:
s31: according to the formula R ═ T1-T2A value of the degree of superheat R can be determined, a logical comparison module compares R to values within the interval range, and the difference in the ratio is denoted as W, where W is-Expressed as the calculated degree of superheat being below the interval minimum value of 5, W+Expressed as the calculated degree of superheat is higher than the interval maximum value 8;
s32: calculating the obtained superheat degree by a ratio difference, wherein W-=|R-5|,W+And R-8, and transmitting the ratio difference data to a steering judgment module and a steering angle determination module.
7. The automobile refrigeration thermal expansion valve based on the sectional type heat exchange structure as claimed in claim 6, wherein: the working steps of the S4 are as follows:
s41: the turning angle judging module judges whether liquid enters or exits the hydraulic cylinder (18) according to the received positive and negative signs of the lower right corner of the ratio difference, if the liquid is displayed as a negative sign, the upper cavity in the hydraulic cylinder (18) discharges liquid, the piston rod drives the upper template (14) to move upwards, meanwhile, the upper template (14) drives the connecting rod (19) to ascend and the rotating rod (15) to rotate, further, the adjusting screw (16) rotates clockwise, the internal spring force is increased to reduce the opening degree of the expansion valve (4), and if the liquid is displayed as a positive sign, the working principles are opposite;
s42: when the upper template (14) moves up and down, a compression block (20) below the upper template stretches or compresses along with the upper template (14), the emitter (21) moves up and down along with the compression block (20), the scanner (3) receives signals sent by the emitter (21), the moving distance L of the upper template (14) is obtained indirectly, and the rotation angle determining module obtains the rotation angle theta of the adjusting screw (16) by controlling the L;
s43: after the specific difference W, the sign and the theta thereof are known, the data processing module obtains the liquid inlet and outlet quantity Q and transmits the data to the adjusting module.
8. The automobile refrigeration thermostatic expansion valve based on the sectional type heat exchange structure according to claim 7, wherein: the formula of the liquid inlet and outlet amount calculated by the corner determining module is as follows:
Q=Q0*L
wherein L is the moving distance of the upper template (14), Q0The relationship between θ and L is known as the amount of liquid entering and exiting per unit distance
Figure FDA0003354114900000051
The larger W is, the larger L is, and theta is proportional to L, and a is the length of the rotating lever (15).
9. The automobile refrigeration thermal expansion valve based on the sectional type heat exchange structure as claimed in claim 8, wherein: the quality evaluation module comprises the following operation steps:
s81: after the expansion valves (4) are detected, the scanning and recording module records the moving times of the emitter (21) and transmits the data to the qualified computing module;
s82: the data calling module calls the relevant detection data of the expansion valve (4) and transmits the data to the qualified calculation module;
s83: and the qualified computing module carries out comprehensive computation on the quality of the batch of expansion valves (4).
10. The automotive refrigeration thermostatic expansion valve based on the sectional type heat exchange structure according to claim 9, characterized in that: the quality evaluation formula in the qualified calculation module is as follows:
Figure FDA0003354114900000052
wherein n is the total number of the extracted expansion valves (4), and C represents the number of times the upper die plate (14) moves when the corresponding expansion valve (4) is detected.
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Publication number Priority date Publication date Assignee Title
US20030192677A1 (en) * 2002-04-10 2003-10-16 Xiaoyang Rong Heat exchanger inlet tube with flow distributing turbulizer
CN103673416A (en) * 2012-08-31 2014-03-26 杭州三花研究院有限公司 Control method for refrigerant flow quantity in automobile air conditioning system and automobile air conditioning system
CN105181313A (en) * 2015-08-25 2015-12-23 天津商业大学 Performance contrast experiment table of thermal expansion valves
CN207352871U (en) * 2017-07-27 2018-05-11 天津商业大学 A kind of breakdown of refrigeration system analysis and performance test experiment porch
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