CN2286866Y - Mircro-power-consumption anti-blocked thermal (cold) flow meter - Google Patents

Abstract

The utility model discloses a micro-power consumption and blockage prevention thermal (cold) flow meter which has the advantages of blockage prevention, micro power consumption, no external power supplies, small size, low cost and electromechanical integration. An impeller shaft is arranged on a shaft frame in a primary instrument in a direction which is vertical to the flow direction of fluid, an impeller is arranged on the impeller shaft through a ruby bearing, and an inlet temperature sensor is also arranged on the shaft frame. A screw cap is arranged at the top of the primary instrument and is connected with a secondary instrument through a connecting pipe, and a fastening screw rod is arranged between the secondary instrument and the primary instrument. An instrument cover is attached on the secondary instrument, and a micro-power consumption singlechip, a liquid crystal display and a high energy battery are arranged in the secondary instrument.

Description

Little power consumption anti-blocking heat (cold) amount meter

The utility model belongs to a kind of heat (cold) amount meter, particularly a kind of little power consumption anti-blocking heat (cold) amount meter.

The medium that heat (cold) amount meter is mainly used in heat supply (cooling) system carries out temperature, flow, the metering of heat (cold) amount parameter, and the foundation as metering and charge is similar to the effect of water meter, ammeter, gas meter.

At present, the usable floor area charge by the user is all adopted in the metering of domestic heating (cooling) charge, and the actual consumption heat what can not embody, and this charging method is not meet reality and inaccurate.In developed country, generally be to adopt heat (cold) amount meter as metering and charge foundation.It reaches the intelligent secondary instrument that links to each other with primary instrument by lead by flow primary instrument, temperature-sensing element and forms, its volume is big, cost is high, particularly impeller in primary instrument and direction of flow are perpendicular, easily make the impurity in the fluid bottle up primary instrument; In addition, the single-chip microcomputer power consumption that it adopts in secondary instrument is big, needs external power supply, like this, just is difficult for being accepted by Chinese average family.

The purpose of this utility model is to overcome the deficiencies in the prior art part, a kind of anti-blocking is provided thereby is applicable to impurity containing fluid and little power consumption, dispense with outer connecting power and volume are little, cost is low, little power consumption anti-blocking heat (cold) of electromechanical integration amount meter.

The utility model is achieved in that it is by the flow primary instrument, temperature-sensing element and intelligent secondary instrument are formed, said primary instrument comprises the table body, be contained in the flow sensor of showing the pedestal in the body and being fixed on the pedestal upper end, its special character is, with the direction of flow vertical direction impeller shaft is housed on the pedestal in primary instrument table body, direction of flow is equipped with impeller by the ruby bearing in the impeller shaft upper edge, inlet temperature sensor also is installed on the groove at pedestal top, at the primary instrument top blind nut is installed, be placed with sealing gasket therebetween, said blind nut is connected with secondary instrument by connecting leg, on the secondary instrument inwall and between the primary instrument table body fastening screw is being installed also, on the boss of the madial wall of secondary instrument, be bonded with secondary instrument table lid, constitute anti-dismounting structure, in secondary instrument, be placed with and be used for calculating the temperature difference, instantaneous delivery, instantaneous heat, the ultra low-power microcontroller of heat accumulative and be used for displays temperature, instantaneous heat, the LCD of heat accumulative and be used to provide the high-energy battery of power supply, the input end of said ultra low-power microcontroller respectively with advance, outlet temperature sensor, flow sensor links to each other with the parameter setting switch, is used for importing the resistance value of out temperature correspondence respectively, the pulse value of the umber of pulse of flow correspondence and setting unit volume correspondence.

According to above-mentioned little power consumption anti-blocking heat (cold) amount meter, said impeller, blade are made by the reinforced plastic material, and at the top of blade a gap is arranged, be fitted with little magnet steel in this gap, said little magnet steel and flow sensor constitute two passive pulse signal sources of magnetic pole induction type.

When fluid is flowed through pipeline when the instrument, the kinetic energy of fluid impacts impeller, impeller is produced driving moment, make impeller overcome friction square and fluid resistance square produce rotation, in certain flow range, to certain fluid media (medium) viscosity, the angular velocity of impeller rotation is directly proportional with rate of flow of fluid (flow), by calculating the volumetric flow rate that flows through instrument, the rotating speed of impeller detects by sensor, when each blade forwards sensing station to, make the inductive coil in the flow sensor produce induction current, promptly produce a pulse signal, amplify shaping by the circuit pulse signals, give single-chip microcomputer and carry out the flow value that computing obtains fluid, single-chip microcomputer detects two-way (import by the program support performance, outlet) resistance value that changes by temperature variation, calculate temperature, the temperature difference, detect the pulsed quantity in the unit interval again, calculate instantaneous delivery, calculate instantaneous heat, go out said temperature by liquid crystal display displays again by temperature approach, instantaneous heat, heat accumulative.

The utility model has the advantages that volume is little, cost is low, electromechanical integration and little power consumption, dispense with outer connecting power, and can prevent that the user tears table privately open; Because tangential impeller becomes with direction of flow tangentially, can prevent the impurity obstruction, and impeller, blade employing reinforced plastic, again can corrosion-resistant, non-scaling, thereby, reliable operation, long service life.

Provide embodiment of the present utility model below in conjunction with accompanying drawing:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A cut-open view of Fig. 1;

Fig. 3 is that the B of Fig. 1 is to view;

Fig. 4 is circuit theory diagrams of the present utility model;

Fig. 5 is a program flow diagram of the present utility model.

As shown in drawings, the utility model has a primary instrument table body 1, in the 1A suitable for reading of table body 1, be placed with pedestal 2, on the sidewall of pedestal 2, have through hole 2A, in through hole 2A, be fitted with impeller shaft 16, impeller shaft 16 is vertical with direction of flow, on impeller shaft 16, pass through ruby bearing 18,19 are equipped with tangential impeller 14, blade 15 on the impeller 14 is along impeller 14 outer rim tangential distribution, said impeller 14, blade 15 adopts polycarbonate to make (also can adopt polypropylene to make), and be processed with rectangle gap 15A at the top of blade 15, in gap 15A, be fitted with little magnet steel 17, at pedestal 2 crown centers a circular groove 2B is arranged, in groove 2B, be placed with by iron core 12, inductive coil 11, the flow sensor 10 that magnet steel 10 constitutes, the side lower part of said flow sensor 10 is bonded on the groove 2B, and little magnet steel 17 and the two passive pulse signal sources of magnetic pole induction type of flow sensor 10 formations.In another groove 2C at pedestal 2 tops, be fastened with inlet temperature sensor 3, on primary instrument table body 1, blind nut 5 is installed also, be placed with sealing gasket 4 between blind nut 5 and the primary instrument upper surface, in the screw socket at blind nut 5 middle parts by the connecting leg 13 that has been threaded, the other end of connecting leg 13 is by the secondary instrument watchcase 7 that has been threaded, between said primary instrument table body 1 two ends and secondary instrument watchcase 7 basal surfaces fastening screw 6 is installed, on the step 7A of the madial wall of secondary instrument watchcase 7, also be bonded with table and cover 8, constitute anti-dismounting structure, in case the user tears table privately open, showing to cover to have display window 20 on 8, in the said secondary instrument 9 ultra low-power microcontroller 23 is installed, LCD 22 and provide the high-energy battery 24 of power supply for it, the respective input of ultra low-power microcontroller 23 respectively with advance, outlet temperature sensor 3 and 21, flow sensor 10 links to each other with parameter setting switch 25, import respectively into, the resistance value of outlet temperature correspondence, the pulsed quantity of flow sensor 10 detected corresponding flows and set the pulse number value of every cubic metre of correspondence, said ultra low-power microcontroller 23 can adopt SM6200, its principle of work is seen Fig. 5, at first initialization, the touring then out temperature that shows, instantaneous heat and heat accumulative; Judge whether operation again,, then read switch, deposit parameter if do not have operation, be pulse number/rice 3, judge whether operation again,, repeat above-mentioned steps if do not have operation, if operation, then the enabling counting device is got umber of pulse in 1 second, the calculated flow rate value, every 10 seconds start-up temperature passages (, so at set intervals, starting once) because of the temperature channel power consumption is big, time-delay 100mS (to reduce power consumption) calculates heat, heat accumulative, send the display buffer, touring again the demonstration repeats above-mentioned whole process, gets final product.

Claims (2)

1, a kind of little power consumption anti-blocking heat (cold) amount meter, by the flow primary instrument, temperature-sensing element and intelligent secondary instrument are formed, said primary instrument comprises the table body, be contained in the flow sensor of showing the pedestal in the body and being fixed on the pedestal upper end, it is characterized in that, pedestal (2) in primary instrument table body (1) is gone up and the direction of flow vertical direction is equipped with impeller shaft (16), pass through ruby bearing (18 at impeller shaft (16) upper edge direction of flow, 19) impeller (14) is housed, on the groove (2C) at pedestal (2) top, inlet temperature sensor (3) is installed also, at primary instrument table body (1) top blind nut (5) is installed, be placed with sealing gasket (4) therebetween, said blind nut (5) is connected with secondary instrument watchcase (7) by connecting leg (13), on secondary instrument watchcase (7) inwall and between the primary instrument table body (1) fastening screw (6) is being installed also, on the boss (7A) of the madial wall of secondary instrument watchcase (7), be bonded with secondary instrument table lid (8), constitute anti-dismounting structure, in secondary instrument (9), be placed with and be used for calculating the temperature difference, instantaneous delivery, instantaneous heat, the ultra low-power microcontroller of heat accumulative (23) and be used for displays temperature, instantaneous heat, the LCD of heat accumulative (22) and be used to provide the high-energy battery (24) of power supply, the input end of said ultra low-power microcontroller (23) respectively with advance, outlet temperature sensor (3,21), flow sensor (10) links to each other with parameter setting switch (25), is used for respectively importing, the resistance value of outlet temperature correspondence, the umber of pulse corresponding and every cubic metre of corresponding umber of pulse of setting with flow.

2, little power consumption anti-blocking heat according to claim 1 (cold) amount meter, it is characterized in that, said impeller (14), blade (15) are made by the reinforced plastic material, and a gap (15A) is arranged at the top of blade (15), be fitted with little magnet steel (17) in this gap (15A), said little magnet steel (17) constitutes two passive pulse signal sources of magnetic pole induction type with flow sensor (10).

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