CN103423877A - Pulsating pressure detection system of electric water heater inner container and low consumption detection method - Google Patents
Pulsating pressure detection system of electric water heater inner container and low consumption detection method Download PDFInfo
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Abstract
The invention discloses a pulsating pressure detection system of an electric water heater inner container and a low consumption detection method. The pulsating pressure detection system comprises a variable frequency motor water pump, an overflow valve, an overflow valve of an additional remote control port tandem connection overflow electromagnet, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, an electro-hydraulic proportional valve, a check valve, a first pressure sensing transmitter, a second pressure sensing transmitter, a pressurization energy accumulator, a pressure maintaining energy accumulator, the water storage type electric water heater inner container, a water tank, a controller and a connecting line. The pressurization energy accumulator and the pressure maintaining energy accumulator are both inflatable energy accumulators. Due to the fact that the double-energy-accumulator structure of the pressurization energy accumulator and the pressure maintaining energy accumulator is adopted in the pulsating pressure detection system, the energy consumption of the system is lowered, high-low pressure circulation pulsating pressure borne by the output end of the water pump is reduced, the damage of 'back pressure' on the water pump is also reduced, an analog quantity proportional valve PID is used for adjusting the water volume injected into the electric water heater inner container, and the damage of the 'water attack phenomenon' caused by a switching valve on the detection system is relieved.
Description
Technical field
The invention belongs to the pulse detection technique category of electric heater, relate in particular to a kind of pulse detection system and low consumption detection method of inner container of electric water heater.
Background technology
Approximately 1,300 ten thousand of year sales volumes of China's electric heater, for the orderly sound development of standard electric heater industry, protection user's personal safety, country and relevant industrial department successively introduce, formulate and promulgated a series of technical specification and standard: GB4706.1 " safety general of family expenses and similar applications electrical equipment requires ", GB4706.12 " specific (special) requirements of the safe storage-type electric water heater of family expenses and similar applications electrical equipment ", GB/T20289-2006 " storage-type electric water heater ", IEC60379 " water heater method for testing performance ", QB/T 4101-2010 " water storage type liner of water heater ".Technical specification and standard have clearly defined rated capacity, the efficiency of heating surface of storage-type electric water heater, the technical indicator of 24 hours intrinsic energy consumptions, hot water delivery rate, scale return difference, temperature return difference, security parameter and inner container of electric water heater pulses.Under the prior art condition, the checkout gear of front 7 indexs of storage-type electric water heater and detection method are quite effectively ripe; Even to this day still poor Strong people's will, urgently improvement of pulse test item only.The GB technical essential that the water storage type liner of water heater pulse detects is as follows:
Test pressure: 15%～100 ± 5% of rated pressure, adjustable extent 0～1Mpa;
Impact count range: 0～999999 time;
Operating voltage: AC220V;
Operating temperature: 0 ℃～+ 50 ℃;
Working relative humidity: 10%～90%RH;
Frequency of impact: 25～60 times/min;
Work period: stop 10min after every the impact for 10000 times, the range estimation container is without obvious distortion, the more next work period of continuation, circulation total degree >=80000.
Obviously, the technological difficulties that pulse detects are the HI high impact Frequency Index at adjustable pressure (rated pressure 15%～100 ± 5%) water source; As adopt the adjustable pressure water source that hangs down frequency of impact, detection efficiency lowly, has more departed from GB, real inadvisable.
At present, the current technology of obtaining the adjustable pressure water source is the rotation speed change by the variable-frequency motor water pump; Motor, water pump have intrinsic rotary inertia, therefore the rate of change of variable-frequency motor pump rotary speed can't reach the desired pressure change rate in adjustable pressure water source at all, and the frequency of impact that pulse detects is limited to the achieved rate of change of variable-frequency motor pump rotary speed; At present, the solution that inspection body and manufacturing enterprise all propose " high-pressure frequency-conversion water pump+pipeline switching " (is consulted patent " container pulsating pressure service life tester for electric water heater ", patent No. ZL201120240605.X; Wang Donghao, water heater liner pressure experimental device, household electrical appliances science and technology [J], 2007.11).The basic principle of " high-pressure frequency-conversion water pump+pipeline switching " solution is: detect whole process at pulse, the variable-frequency motor of Frequency Converter Control and water pump are all the time in fast state; Release during pulse detects, the low-pressure pressure retaining process after release are by the keying of valve on respective line, i.e. the pipeline switching by the pulse detection system realizes; Pressurization during pulse detects, the high pressure pressure maintaining period after pressurization, still depend on valve and open and close the pipeline switching realized; Due to the variable-frequency motor water pump all the time in fast state, thereby eliminated add/stress-relief process corresponding, the variable-frequency motor water pump from low/high speed paramount/the required time of low speed--reached the desired rate of pressure change in pulse detection system adjustable pressure water source." high-pressure frequency-conversion water pump+pipeline switching " solution is feasible, but defect is a lot of, haves much room for improvement; " high-pressure frequency-conversion water pump+pipeline switching " defect of solution, the reason of defect and improvement behave particularize are as follows:
1, the energy consumption of pulse detection system is large.The impact major cycle flow process that pulse detects relates to: the high pressure pressure maintaining period after pressurization, pressurization, the low-pressure pressure retaining process after release, release; Need the pressure process of impacting the major cycle flow process of only having of variable-frequency motor water pump input energy, the variable-frequency motor water pump input energy that maintains high/low pressure pressure maintaining period is insignificant, only for compensating the leakage loss of container to be detected and associated pipe, stress-relief process is that the energy of container inner high voltage water to be detected discharges.The variable-frequency motor water pump of " high-pressure frequency-conversion water pump+pipeline switching " solution is all the time in fast state, and the variable-frequency motor water pump of high/low pressure pressurize and stress-relief process input energy is in wasting state, therefore cause the energy consumption of pulse detection system excessive.The standing pulse detection system of inspection body and manufacturing enterprise of take is example, the power of variable-frequency motor water pump is in the 4000W left and right, and the water storage type liner of water heater pulse detects (frequency is got 50 times/min, pulse cycle total degree=80000) and consumes electric energy: (80000 ÷ 50) ÷ 60 * 4+(80000 ÷ 10000) * 10 ÷ 60 * 4=112(degree); In view of pressure process only accounts for the sub-fraction of impacting the major cycle timeslice, the overwhelming majority of 112 degree electric energy wastes.Under the prerequisite that guarantees the reliable and stable operation of pulse detection system, if take full advantage of the variable-frequency motor water pump input energy of high/low pressure pressurize and stress-relief process, the mistake high energy consumption of pulse detection system will be reduced.
2, the negative effect in " back pressure " and " water hammer " paired pulses pressure detecting system life-span.In " high-pressure frequency-conversion water pump+pipeline switching " solution, variable-frequency motor water pump output need bear the pulse of high-low pressure circulation, and " back pressure " that output occurs will shorten the life-span of water pump (pressure detecting system).On the other hand, the release during pulse detects, the low-pressure pressure retaining process after release, the high pressure pressure maintaining period after pressurization, pressurization, all adopt the keying of switch valve and multi-pipeline switching to realize; The switching of valve and multi-pipeline forms hydraulic impact and produces water attack (water hammer), and " water hammer ", to electric heater, the device of detection system, pipeline and connecting piece all can bring damage; In addition, pipeline switches because of the pipeline Limited Number, and detection system can be for the scope detected also by limited.If it is substantially constant that the water pressure energy that variable-frequency motor water pump output bears keeps, will effectively overcome the negative factor of " back pressure "; If hydraulic damping device is set and reduces the pipeline number of handovers, will be expected to reduce the damage of " water hammer "; In addition, the water of injection water storage type liner of water heater is subject to analog quantity but not switching value is controlled, and continuation detection system greatly can be for the scope detected.
3, impact the qualitative disadvantage in time of pressurization in the major cycle cycle, high pressure pressurize, release and low-pressure pressure retaining process in the uniformity of testing result.
For the pulse detection system of water storage type liner of water heater and the defect of detection method existence, the present invention is improvement measures one by one: at first, the output of variable-frequency motor water pump is installed the inflatable accumulator, when release, high/low pressure pressure maintaining period, accumulator absorbs the energy of variable-frequency motor water pump output, and during pressure process, accumulator and variable-frequency motor water pump are exported energy jointly; Both reduce the energy consumption of detection system, eliminated again " back pressure " of variable-frequency motor water pump output.Secondly, adopt analog quantity proportioning valve PID to regulate the water yield that inner container of electric water heater injects; Not only alleviated the harm of " water hammer ", and continuation detection system can be for the scope detected.The 3rd, the time of pressurization in the major cycle cycle, high pressure pressurize, release and low-pressure pressure retaining process is impacted in quantification, contributes to promote the uniformity of pulse detection system testing result.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of pulse detection system and low consumption detection method of inner container of electric water heater is provided.
The pulse detection system of water storage type liner of water heater comprises the variable-frequency motor water pump, overflow valve, the first magnetic valve, the second magnetic valve, the 3rd magnetic valve, electro-hydraulic proportional valve, the check-valves of overflow valve, additional remote control mouth serial connection overflow electromagnet, the first pressure sensing transmitter, the second pressure sensing transmitter, pressurization accumulator, pressurize accumulator, water storage type liner of water heater, water tank, controller and connecting line form, and pressurization accumulator and pressurize accumulator are the inflatable accumulator;
Controller comprises that input and output module that CPU224XP DC/DC/DC module, CPU module carry, the mould that the CPU module carries enter mould and go out communication module, the touch-screen MT8070iH module that module, power supply NES-75-24 module, CPU module carry;
The water inlet of variable-frequency motor water pump is connected with water tank by water inlet pipe, the first via delivery port of variable-frequency motor water pump is connected with water tank through overflow valve, the second road delivery port of variable-frequency motor water pump is through check-valves, the overflow valve of additional remote control mouth serial connection overflow electromagnet is connected with water tank, the Third Road delivery port of variable-frequency motor water pump passes through check-valves successively, the pressurization accumulator, the first pressure sensing transmitter, the first magnetic valve, electro-hydraulic proportional valve, the second pressure sensing transmitter, water storage type liner of water heater, the 3rd magnetic valve is connected with water tank, the water inlet of the second magnetic valve is connected on the pipeline between the first magnetic valve and electro-hydraulic proportional valve, the delivery port of the second magnetic valve is connected with the pressurize accumulator,
The CPU224XP DC/DC/DC module of controller is carried out transfer of data by communication module and touch-screen MT8070iH module, civil power one tunnel access variable-frequency motor, another road access power supply of civil power NES-75-24 module, 4 way switch amount DO of input and output module output
1, DO
2, DO
3, DO
4With overflow valve, the first magnetic valve, the second magnetic valve, the 3rd magnetic valve of additional remote control mouth serial connection overflow electromagnet, be connected respectively, mould enters two mould entrances that mould goes out module and accesses respectively the AI that the first pressure sensing transmitter, the second pressure sensing transmitter are exported
1And AI
2Analog quantity, mould enters the simulation controlled quentity controlled variable AO that mould goes out the mould outlet output of module and is connected with electro-hydraulic proportional valve.
The low consumption detection method of pulse detection system comprises 10 minutes pressurize flow processs that detect after preparing flow process, impact the major cycle flow process and impacting major cycle for ten thousand times;
Detect and prepare flow process: input test pressure P on the touch-screen human-computer interaction interface
0, the impact major cycle total degree N that detects of pulse, impact the major cycle frequency f
0Impact the major cycle cycle T
0, work period T, the interval time of work period, impact the pressurization t in the major cycle cycle
1/ high pressure pressurize t
2/ release t
3/ low-pressure pressure retaining t
4Process time,
Determine the operating pressure threshold values P of overflow valve
1, the operating pressure threshold values P of input overflow valve on the touch-screen human-computer interaction interface
2, P
1P
2P
0,
Close the 3rd magnetic valve, open the first magnetic valve, the second magnetic valve, electro-hydraulic proportional valve, water storage type liner of water heater is filled with water, is closed electro-hydraulic proportional valve, starts the variable-frequency motor water pump, as pressure simulation amount AI
1P
2The switching value DO of Time Controller
1Open overflow valve, when the outlet of variable-frequency motor water pump, press and be greater than P
1The time overflow valve overflow, pressurization accumulator and pressurize accumulator complete accumulation of energy, enter the condition of impacting major cycle flow process pressure process ready;
Impacting the major cycle flow process is comprised of pressurization, high pressure pressurize, release and low-pressure pressure retaining process:
Pressure process--variable-frequency motor water pump operation, close the 3rd magnetic valve, open the first magnetic valve and the second magnetic valve, according to deviation P
0-AI
2, PID control electro-hydraulic proportional valve aperture, make AI
2=P
0If, t
1<0.15T
0Or t
10.2T
0, impact and turn down or heighten the frequency of variable-frequency motor water pump when the major cycle flow process finishes otherwise the frequency of variable-frequency motor water pump is constant,
High pressure pressure maintaining period--variable-frequency motor water pump operation, close the first magnetic valve, according to deviation P
0-AI
2, PID controls aperture, the pressurize accumulator of electro-hydraulic proportional valve and exports energy to water storage type liner of water heater, and the variable-frequency motor water pump is to pressurization accumulator output energy, until t
1+ t
2=0.5T
0,
Stress-relief process--variable-frequency motor water pump operation, close the second magnetic valve and electro-hydraulic proportional valve, unlatching the 3rd magnetic valve, works as AI
2=0.15P
0The time close the 3rd magnetic valve, variable-frequency motor water pump to pressurization accumulator output energy,
Low-pressure pressure retaining process--variable-frequency motor water pump operation, open the second magnetic valve and electro-hydraulic proportional valve, according to deviation 0.15P
0-AI
2, PID controls aperture, the pressurize accumulator of electro-hydraulic proportional valve and exports energy to water storage type liner of water heater, and the variable-frequency motor water pump is to pressurization accumulator output energy, until t
3+ t
4=0.5T
0
AI
2<P
0And the connecting line no problem, water storage type liner of water heater is defective and end to detect,
The range estimation water storage type liner of water heater obviously is out of shape, defective and termination detection,
Estimate water storage type liner of water heater without obviously distortion, impact major cycle number<impact total N to carry out the new work period,
The range estimation water storage type liner of water heater without obviously distortion, to impact the total N of major cycle number=impact qualified and end to detect.
The present invention compares with background technology, and the beneficial effect had is:
By the two accumulators of add/pressurize, take full advantage of the variable-frequency motor water pump input energy of high/low pressure pressurize and stress-relief process, reduced the mistake high energy consumption of pulse detection system;
By the two accumulators of add/pressurize, reduced the high-low pressure cycle pulse pressure that variable-frequency motor water pump output bears, reduced the infringement of water pump output " back pressure " to water pump;
Adopt analog quantity proportioning valve PID to regulate the water yield that inner container of electric water heater injects, alleviated " water hammer " that cause because of switch valve harm to detection system, and continuation detection system can be for the scope detected.
The accompanying drawing explanation
Fig. 1 is the pulse detection system structure chart of water storage type liner of water heater;
Fig. 2 (a) is the low consumption detection method flow chart of pulse detection system;
Fig. 2 (b) is that the detection system of pulse detection system is prepared flow process;
Fig. 2 (c) is the impact major cycle flow process of pulse detection system;
Fig. 2 (d) is 10 minutes pressurize flow processs of pulse detection system.
The specific embodiment
As shown in Figure 1, the pulse detection system of water storage type liner of water heater comprises variable-frequency motor water pump 10, overflow valve 21, the first magnetic valve 22, the second magnetic valve 23, the 3rd magnetic valve 24, electro-hydraulic proportional valve 25, the check-valves 26 of overflow valve 20, additional remote control mouth serial connection overflow electromagnet, the first pressure sensing transmitter 31, the second pressure sensing transmitter 32, pressurization accumulator 41, pressurize accumulator 42, water storage type liner of water heater 50, water tank 60, controller 70 and connecting line form, and pressurization accumulator and pressurize accumulator are the inflatable accumulator;
The water inlet of variable-frequency motor water pump 10 is connected with water tank 60 by water inlet pipe, the first via delivery port of variable-frequency motor water pump 10 is connected with water tank 60 through overflow valve 20, the second road delivery port of variable-frequency motor water pump 10 is through check-valves 26, the overflow valve 21 of additional remote control mouth serial connection overflow electromagnet is connected with water tank 60, the Third Road delivery port of variable-frequency motor water pump 10 is successively by check-valves 26, pressurization accumulator 41, the first pressure sensing transmitter 31, the first magnetic valve 22, electro-hydraulic proportional valve 25, the second pressure sensing transmitter 32, water storage type liner of water heater 50, the 3rd magnetic valve 24 is connected with water tank 60, the water inlet of the second magnetic valve 23 is connected on the pipeline between the first magnetic valve 22 and electro-hydraulic proportional valve 25, the delivery port of the second magnetic valve 23 is connected with pressurize accumulator 42,
The CPU224XP DC/DC/DC module 71 of controller 70 is carried out transfer of data by communication module 75 and touch-screen MT8070iH module 76, civil power one tunnel access variable-frequency motor, another road access power supply of civil power NES-75-24 module 74,4 way switch amount DO of input and output module 72 outputs
1, DO
2, DO
3, DO
4With overflow valve 21, the first magnetic valve 22, the second magnetic valve 23, the 3rd magnetic valve 24 of additional remote control mouth serial connection overflow electromagnet, be connected respectively, mould enters two mould entrances that mould goes out module 73 and accesses respectively the AI that the first pressure sensing transmitter 31, the second pressure sensing transmitter 32 are exported
1And AI
2Analog quantity, mould enters the simulation controlled quentity controlled variable AO that mould goes out the mould outlet output of module 73 and is connected with electro-hydraulic proportional valve 25.
As shown in Figure 2, the low consumption detection method of pulse detection system comprises 10 minutes pressurize flow processs that detect after preparing flow process, impact the major cycle flow process and impacting major cycle for ten thousand times;
Detect and prepare flow process: input test pressure P on the touch-screen human-computer interaction interface
0The impact major cycle total degree N(default value that (default value 1MPa), pulse detect 80000 times), impact the major cycle frequency f
0(60 times/min of default value) impacts the major cycle cycle T
010000 impact major cycle time=10000S of (default value 1S), work period T(default value), the interval time (default value 10min) of work period, the pressurization t in the impact major cycle cycle
1/ high pressure pressurize t
2/ release t
3/ low-pressure pressure retaining t
4Process time (default value 0.15T
0≤ t
1≤ 0.2T
0, t
1+ t
2=0.5T
0, t
3≤ 0.2T
0, t
3+ t
4=0.5T
0),
Determine the operating pressure threshold values P of overflow valve 20
1, and manual settings, input the operating pressure threshold values P of overflow valve 21 on the touch-screen human-computer interaction interface
2, P
1P
2P
0,
Close the 3rd magnetic valve 24, open the first magnetic valve 22, the second magnetic valve 23, electro-hydraulic proportional valve 25, water storage type liner of water heater 50 is filled with water, is closed electro-hydraulic proportional valve 25, starts variable-frequency motor water pump 10, as pressure simulation amount AI
1P
2The switching value DO of Time Controller 70
1Open overflow valve 21, when the outlet of variable-frequency motor water pump 10, press and be greater than P
1The time overflow valve 20 overflows, pressurization accumulator 41 and pressurize accumulator 42 complete accumulation of energy, enter the condition of impacting major cycle flow process pressure process ready;
Impacting the major cycle flow process is comprised of pressurization, high pressure pressurize, release and low-pressure pressure retaining process:
10 operations of pressure process--variable-frequency motor water pump, close the 3rd magnetic valve 24, open the first magnetic valve 22 and the second magnetic valve 23, according to deviation P
0-AI
2, PID control electro-hydraulic proportional valve 25 aperture, make AI
2=P
0If, t
1<0.15T
0Or t
10.2T
0, impact and turn down or heighten the frequency of variable-frequency motor water pump 10 when the major cycle flow process finishes otherwise the frequency of variable-frequency motor water pump 10 is constant,
High pressure pressure maintaining period--variable-frequency motor water pump 10 operation, close the first magnetic valve 22, according to deviation P
0-AI
2, PID controls aperture, the pressurize accumulator 42 of electro-hydraulic proportional valve 25 and exports energy to water storage type liner of water heater 50, and variable-frequency motor water pump 10 is to pressurization accumulator 41 output energy, until t
1+ t
2=0.5T
0,
10 operations of stress-relief process--variable-frequency motor water pump, close the second magnetic valve 23 and electro-hydraulic proportional valve 25, open the 3rd magnetic valve 24, works as AI
2=0.15P
0The time close the 3rd magnetic valve 24, variable-frequency motor water pump 10 to pressurization accumulator 41 output energy,
Low-pressure pressure retaining process--variable-frequency motor water pump 10 operation, open the second magnetic valve 23 and electro-hydraulic proportional valve 25, according to deviation 0.15P
0-AI
2, PID controls aperture, the pressurize accumulator 42 of electro-hydraulic proportional valve 25 and exports energy to water storage type liner of water heater 50, and variable-frequency motor water pump 10 is to pressurization accumulator 41 output energy, until t
3+ t
4=0.5T
0
AI
2<P
0And the connecting line no problem, water storage type liner of water heater is defective and end to detect,
The range estimation water storage type liner of water heater obviously is out of shape, defective and termination detection,
Estimate water storage type liner of water heater without obviously distortion, impact major cycle number<impact total N to carry out the new work period,
The range estimation water storage type liner of water heater without obviously distortion, to impact the total N of major cycle number=impact qualified and end to detect.
Claims (2)
1. the pulse detection system of a water storage type liner of water heater, it is characterized in that system comprises variable-frequency motor water pump (10), overflow valve (20), the overflow valve (21) of additional remote control mouth serial connection overflow electromagnet, the first magnetic valve (22), the second magnetic valve (23), the 3rd magnetic valve (24), electro-hydraulic proportional valve (25), check-valves (26), the first pressure sensing transmitter (31), the second pressure sensing transmitter (32), pressurization accumulator (41), pressurize accumulator (42), water storage type liner of water heater (50), water tank (60), controller (70) and connecting line form, pressurization accumulator and pressurize accumulator are the inflatable accumulator,
Controller (70) comprises that input and output module (72) that CPU224XP DC/DC/DC module (71), CPU module carry, the mould that the CPU module carries enter mould and go out communication module (75), the touch-screen MT8070iH module (76) that module (73), power supply NES-75-24 module (74), CPU module carry;
The water inlet of variable-frequency motor water pump (10) is connected with water tank (60) by water inlet pipe, the first via delivery port of variable-frequency motor water pump (10) is connected with water tank (60) through overflow valve (20), the second road delivery port of variable-frequency motor water pump (10) is through check-valves (26), the overflow valve (21) of additional remote control mouth serial connection overflow electromagnet is connected with water tank (60), the Third Road delivery port of variable-frequency motor water pump (10) is successively by check-valves (26), pressurization accumulator (41), the first pressure sensing transmitter (31), the first magnetic valve (22), electro-hydraulic proportional valve (25), the second pressure sensing transmitter (32), water storage type liner of water heater (50), the 3rd magnetic valve (24) is connected with water tank (60), the water inlet of the second magnetic valve (23) is connected on the pipeline between the first magnetic valve (22) and electro-hydraulic proportional valve (25), the delivery port of the second magnetic valve (23) is connected with pressurize accumulator (42),
The CPU224XP DC/DC/DC module (71) of controller (70) is carried out transfer of data by communication module (75) and touch-screen MT8070iH module (76), civil power one tunnel access variable-frequency motor, another road access power supply NES-75-24 module (74) of civil power, 4 way switch amount DO of input and output module (72) output
1, DO
2, DO
3, DO
4With overflow valve (21), the first magnetic valve (22), the second magnetic valve (23), the 3rd magnetic valve (24) of additional remote control mouth serial connection overflow electromagnet, be connected respectively, mould enters two mould entrances that mould goes out module (73) and accesses respectively the AI that the first pressure sensing transmitter (31), the second pressure sensing transmitter (32) are exported
1And AI
2Analog quantity, mould enters the simulation controlled quentity controlled variable AO that mould goes out the mould outlet output of module (73) and is connected with electro-hydraulic proportional valve (25).
2. a low consumption detection method of using pulse detection system as claimed in claim 1, is characterized in that comprising 10 minutes pressurize flow processs that detect after preparing flow process, impact the major cycle flow process and impacting major cycle for ten thousand times;
Detect and prepare flow process: input test pressure P on the touch-screen human-computer interaction interface
0, the impact major cycle total degree N that detects of pulse, impact the major cycle frequency f
0Impact the major cycle cycle T
0, work period T, the interval time of work period, impact the pressurization t in the major cycle cycle
1/ high pressure pressurize t
2/ release t
3/ low-pressure pressure retaining t
4Process time,
Determine the operating pressure threshold values P of overflow valve (20)
1, input the operating pressure threshold values P of overflow valve (21) on the touch-screen human-computer interaction interface
2, P
1P
2P
0,
Close the 3rd magnetic valve (24), open the first magnetic valve (22), the second magnetic valve (23), electro-hydraulic proportional valve (25), water storage type liner of water heater (50) is filled with water, is closed electro-hydraulic proportional valve (25), starts variable-frequency motor water pump (10), as pressure simulation amount AI
1P
2The switching value DO of Time Controller (70)
1Open overflow valve (21), when the outlet of variable-frequency motor water pump (10), press and be greater than P
1The time overflow valve (20) overflow, pressurization accumulator (41) and pressurize accumulator (42) complete accumulation of energy, the condition that enters impact major cycle flow process pressure process is ready;
Impacting the major cycle flow process is comprised of pressurization, high pressure pressurize, release and low-pressure pressure retaining process:
Pressure process--variable-frequency motor water pump (10) operation, close the 3rd magnetic valve (24), open the first magnetic valve (22) and the second magnetic valve (23), according to deviation P
0-AI
2, PID control electro-hydraulic proportional valve (25) aperture, make AI
2=P
0If, t
1<0.15T
0Or t
10.2T
0, impact and turn down or heighten the frequency of variable-frequency motor water pump (10) when the major cycle flow process finishes otherwise the frequency of variable-frequency motor water pump (10) is constant,
High pressure pressure maintaining period--variable-frequency motor water pump (10) operation, close the first magnetic valve (22), according to deviation P
0-AI
2, PID controls aperture, the pressurize accumulator (42) of electro-hydraulic proportional valve (25) and exports energy to water storage type liner of water heater (50), and variable-frequency motor water pump (10) is to pressurization accumulator (41) output energy, until t
1+ t
2=0.5T
0,
Stress-relief process--variable-frequency motor water pump (10) operation, close the second magnetic valve (23) and electro-hydraulic proportional valve (25), open the 3rd magnetic valve (24), works as AI
2=0.15P
0The time close the 3rd magnetic valve (24), variable-frequency motor water pump (10) to pressurization accumulator (41) output energy,
Low-pressure pressure retaining process--variable-frequency motor water pump (10) operation, open the second magnetic valve (23) and electro-hydraulic proportional valve (25), according to deviation 0.15P
0-AI
2, PID controls aperture, the pressurize accumulator (42) of electro-hydraulic proportional valve (25) and exports energy to water storage type liner of water heater (50), and variable-frequency motor water pump (10) is to pressurization accumulator (41) output energy, until t
3+ t
4=0.5T
0
Impact 10 minutes pressurize flow processs after major cycle for ten thousand times: at first complete the pressure process of impacting the major cycle flow process, close the 3rd magnetic valve (24), reduce variable-frequency motor water pump (10) frequency, open the first magnetic valve (22) second magnetic valves (23) and electro-hydraulic proportional valve (25), according to deviation P
0-AI
2, aperture, pressurization accumulator (41) and pressurize accumulator (42) that PID controls electro-hydraulic proportional valve (25) make AI to water storage type liner of water heater (50) output energy
2=P
0, time delay 10min;
AI
2<P
0And the connecting line no problem, water storage type liner of water heater is defective and end to detect,
The range estimation water storage type liner of water heater obviously is out of shape, defective and termination detection,
Estimate water storage type liner of water heater without obviously distortion, impact major cycle number<impact total N to carry out the new work period,
The range estimation water storage type liner of water heater without obviously distortion, to impact the total N of major cycle number=impact qualified and end to detect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310340464.2A CN103423877B (en) | 2013-08-06 | 2013-08-06 | The pulse detection system of inner container of electric water heater and low consumption detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310340464.2A CN103423877B (en) | 2013-08-06 | 2013-08-06 | The pulse detection system of inner container of electric water heater and low consumption detection method |
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| Publication Number | Publication Date |
|---|---|
| CN103423877A true CN103423877A (en) | 2013-12-04 |
| CN103423877B CN103423877B (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310340464.2A Expired - Fee Related CN103423877B (en) | 2013-08-06 | 2013-08-06 | The pulse detection system of inner container of electric water heater and low consumption detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612668A (en) * | 2017-09-30 | 2019-04-12 | 宁波方太厨具有限公司 | A kind of water hammer test macro and test method |
| CN110940602A (en) * | 2019-12-13 | 2020-03-31 | 四川大学 | Synchronous measurement device and method for pulse electromagnetic force and discharge inductance of RLC (radio Link control) discharge circuit |
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| DE4034500C1 (en) * | 1990-10-30 | 1992-03-12 | Schmidt, Kranz & Co Gmbh Zweigniederlassung Zorge, 3421 Zorge, De | Pulse testing arrangement for component subjected to hydraulic fluid - has connection blocks in closed test liquid circuit and having heating elements controlled by pressure resistant temp. sensors |
| JPH08122235A (en) * | 1994-10-19 | 1996-05-17 | Meiko Sangyo Kk | Water level difference measuring device in automatic withstanding pressure measuring device for cylinder |
| CN1657893A (en) * | 2004-02-19 | 2005-08-24 | 通用电气公司 | Apparatus and methods for dynamically pressure testing an article |
| CN201221474Y (en) * | 2007-12-18 | 2009-04-15 | 台州市耀达工贸有限公司 | Water pump electronic pressure controller |
| CN102445391A (en) * | 2011-10-09 | 2012-05-09 | 东南大学 | Pressure pulse fatigue testing device for directly generating pulses with plunger pump |
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- 2013-08-06 CN CN201310340464.2A patent/CN103423877B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4034500C1 (en) * | 1990-10-30 | 1992-03-12 | Schmidt, Kranz & Co Gmbh Zweigniederlassung Zorge, 3421 Zorge, De | Pulse testing arrangement for component subjected to hydraulic fluid - has connection blocks in closed test liquid circuit and having heating elements controlled by pressure resistant temp. sensors |
| JPH08122235A (en) * | 1994-10-19 | 1996-05-17 | Meiko Sangyo Kk | Water level difference measuring device in automatic withstanding pressure measuring device for cylinder |
| CN1657893A (en) * | 2004-02-19 | 2005-08-24 | 通用电气公司 | Apparatus and methods for dynamically pressure testing an article |
| CN201221474Y (en) * | 2007-12-18 | 2009-04-15 | 台州市耀达工贸有限公司 | Water pump electronic pressure controller |
| CN102445391A (en) * | 2011-10-09 | 2012-05-09 | 东南大学 | Pressure pulse fatigue testing device for directly generating pulses with plunger pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612668A (en) * | 2017-09-30 | 2019-04-12 | 宁波方太厨具有限公司 | A kind of water hammer test macro and test method |
| CN110940602A (en) * | 2019-12-13 | 2020-03-31 | 四川大学 | Synchronous measurement device and method for pulse electromagnetic force and discharge inductance of RLC (radio Link control) discharge circuit |
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| CN103423877B (en) | 2015-08-26 |
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