CN201615548U - Water leakage-proof digital heatmeter - Google Patents
Water leakage-proof digital heatmeter Download PDFInfo
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- CN201615548U CN201615548U CN2010201276514U CN201020127651U CN201615548U CN 201615548 U CN201615548 U CN 201615548U CN 2010201276514 U CN2010201276514 U CN 2010201276514U CN 201020127651 U CN201020127651 U CN 201020127651U CN 201615548 U CN201615548 U CN 201615548U
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Abstract
The utility model relates to a heatmeter, in particular to a water leakage-proof digital heatmeter which solves the problem that the traditional heatmeter cannot fulfill the function of preventing a radiator from leaking water. The water leakage-proof digital heatmeter comprises a first flow sensor, a first temperature sensor, an A/D (Analog to Digital) converting circuit, a first electromagnetic valve, a first electromagnetic valve drive circuit, a control circuit, a flow acquisition circuit, a temperature acquisition circuit, a second flow sensor and a second temperature sensor, wherein an output terminal of the first flow sensor is connected with one input terminal of the flow acquisition circuit; a signal output terminal of the first temperature sensor is connected with one signal input terminal of the temperature acquisition circuit; the signal output terminal of the second flow sensor is connected with the other signal input terminal of the flow acquisition circuit; and the signal output terminal of the second temperature sensor is connected with the other signal input terminal of the temperature acquisition circuit. The water leakage-proof digital heatmeter can monitor the inflow rate and the outflow rate of a user family in a real-time manner, and can be used for preventing the radiator from leaking water.
Description
Technical field
The utility model is specifically related to a kind of heat meter.
Background technology
At present, along with the modern management of building heat supplying system, country puts into effect a series of relevant policies existing building is implemented the heat supply household reconstruction, and to each heating power user installation heat meter.Adopt heat meter can measure the enterprise of every family or the heating energy consumption of each household family scientifically and rationally, both can fairly and reasonably press the actual heating heat Calculation of each user heating cost, can encourage the heating power user independently energy-conservation again.
But existing heat meter only measures the flow of inlet water of hot water, and the safeguard measure of being done also just is confined to tamper, the theft-prevention structure to heat metering device, designs and ignored the preventive means of leaking at heating installation.
Summary of the invention
Do not possess this problem of function that anti-heating installation leaks in order to overcome existing heat meter, the utility model provides a kind of digital heat meter of leaking of preventing.
The utility model is achieved by following proposal: a kind of anti-digital heat meter that leaks, it comprises the first flow sensor, first temperature sensor, the A/D change-over circuit, first magnetic valve, first driving circuit for electromagnetic valve, control circuit, memory, power-supplying circuit, flow collection circuit and temperature collection circuit, the first flow sensor, first temperature sensor and first magnetic valve are separately positioned on the water inlet pipe of radiator, the voltage output end of power-supplying circuit links to each other with the voltage input end of control circuit, the data storage input/output terminal of control circuit links to each other with the data storage I/O of memory, the signal output part of first flow sensor links to each other with a signal input part of flow collection circuit, the signal output part of first temperature sensor links to each other with a signal input part of temperature collection circuit, the signal output part of flow collection circuit, the signal output part of temperature collection circuit links to each other with a signal input part of A/D change-over circuit respectively, the sampled signal output of A/D change-over circuit links to each other with the sampled signal input of control circuit, the driving signal output part of control circuit links to each other with the driving signal input of first driving circuit for electromagnetic valve, first driving circuit for electromagnetic valve drives the action of first magnetic valve by electromagnetic force, it also comprises second flow sensor and second temperature sensor, second flow sensor and second temperature sensor are separately positioned on the outlet pipe of radiator, the signal output part of second flow sensor links to each other with another signal input part of flow collection circuit, and the signal output part of second temperature sensor links to each other with another signal input part of temperature collection circuit.
The utility model can also be realized usurping hot water or because of other reasons causes the intelligent monitoring of heating equipment drainage, preventing to cause the hot water loss the user is violating the regulations on the basis of realizing the basic heat metering of heat supply network.The utility model is measured and is handled the metering of realization to the heat supply network consumption of calorie by flow, inflow temperature, the return water temperature of heating equipment; Water flow in the outlet pipe of flow of inlet water in the water inlet pipe of radiator and radiator is monitored, contrasted, if water-in and water-out flow imbalance, SCM system is closed first magnetic valve by first driving circuit for electromagnetic valve.
The utility model has solved the problem that existing heat meter does not design the anti-salvo of leaking of heating installation.When situations such as leaking appears in subscriber household, can accomplish real-time monitoring, avoid causing the loss of hot water and indoor property, prevent the further expansion of accident; On the other hand, can effectively stop user's the water behavior of stealing, both save the hot water in the circulation, ensure the rights and interests of other hot users and heating enterprise again to greatest extent.
The utility model simplifies the structure and cheaply on the basis taking into account, and filled up the blank that heat meter does not have the leakproof water function.For the heat metering field of therrmodynamic system provides the water saving controller that has practical value scheme, the utlity model has that circuit structure is simple, heat supply reliable, be convenient to the advantage of promotion and implementation.
Description of drawings
Fig. 1 is the structural representation of the specific embodiment one; Fig. 2 is the schematic diagram of the specific embodiment five; Fig. 3 is the structural representation of the specific embodiment six; Fig. 4 is the structural representation of the specific embodiment seven; Fig. 5 is the structural representation of the specific embodiment eight.
The specific embodiment
The specific embodiment one: specify present embodiment below in conjunction with Fig. 1.A kind of anti-digital heat meter that leaks, it comprises first flow sensor 1, first temperature sensor 2, A/D change-over circuit 3, first magnetic valve 4, first driving circuit for electromagnetic valve 5, control circuit 6, memory 7, power-supplying circuit 8, flow collection circuit 9 and temperature collection circuit 10, first flow sensor 1, first temperature sensor 2 and first magnetic valve 4 are separately positioned on the water inlet pipe 15 of radiator, the voltage output end of power-supplying circuit 8 links to each other with the voltage input end of control circuit 6, the data storage input/output terminal of control circuit 6 links to each other with the data storage I/O of memory 7, the signal output part of first flow sensor 1 links to each other with a signal input part of flow collection circuit 9, the signal output part of first temperature sensor 2 links to each other with a signal input part of temperature collection circuit 10, the signal output part of flow collection circuit 9, the signal output part of temperature collection circuit 10 links to each other with a signal input part of A/D change-over circuit 3 respectively, the sampled signal output of A/D change-over circuit 3 links to each other with the sampled signal input of control circuit 6, the driving signal output part of control circuit 6 links to each other with the driving signal input of first driving circuit for electromagnetic valve 5, first driving circuit for electromagnetic valve 5 drives 4 actions of first magnetic valve by electromagnetic force, it also comprises second flow sensor 11 and second temperature sensor 12, second flow sensor 11 and second temperature sensor 12 are separately positioned on the outlet pipe 16 of radiator, the signal output part of second flow sensor 11 links to each other with another signal input part of flow collection circuit 9, and the signal output part of second temperature sensor 12 links to each other with another signal input part of temperature collection circuit 10.
The utility model can also be realized usurping hot water or because of other reasons causes the intelligent monitoring of heating equipment drainage, preventing to cause the hot water loss the user is violating the regulations on the basis of realizing the basic heat metering of heat supply network.Present embodiment is measured and is handled the metering of realization to the heat supply network consumption of calorie by flow, inflow temperature, the return water temperature of heating equipment; Water flow in the outlet pipe of flow of inlet water in the water inlet pipe of radiator and radiator is monitored, contrasted, if water-in and water-out flow imbalance, control circuit 6 also cuts out first magnetic valve 4 by first driving circuit for electromagnetic valve 5.
The utility model has solved the problem that existing heat meter does not design the anti-salvo of leaking of heating installation.When situations such as leaking appears in subscriber household, can accomplish real-time monitoring, avoid causing the loss of hot water and indoor property, prevent the further expansion of accident; On the other hand, adopt the described a kind of digital water behavior of stealing that can effectively stop the user that can economize on water of present embodiment, both saved the hot water in the circulation, ensure the rights and interests of other hot users and heating enterprise again to greatest extent.
The specific embodiment two: the difference of the present embodiment and the specific embodiment one is: described control circuit 6 adopts chip microcontroller.
The described chip microcontroller of present embodiment is to the control of the normal operative condition of whole system, because it is less demanding to the performance indications of aspects such as its arithmetic speed, take all factors into consideration its cost and functional requirement, specifically provide a kind of model AT89S52 of suitable single-chip microcomputer.
The utility model can be set to low-power mode, and heat note scale is not when having operation, and working method that can single-chip microcomputer is set to the STOP state.
The specific embodiment three: specify present embodiment below in conjunction with Fig. 2.The difference of the present embodiment and the specific embodiment one is: that described memory 7 adopts is EEPROM.
EEPROM, promptly EEPROM is compared with other memories commonly used, and EEPROM has the outage data and does not have the advantage of losing, and the utlity model has memory function, and the information in the heat meter is remembered voluntarily, and the retention time was 10 years.
The specific embodiment four: the difference of the present embodiment and the specific embodiment one is: the type of described first magnetic valve 4 is a water liquid guide electromagnetic valve.
Described first magnetic valve 4 is applicable to that with water or liquid be working media, can control automatically or the break-make of working media pipelines such as Long-distance Control water, oil, liquid, has to open and close rapidly the reliability advantages of higher.
Described first magnetic valve 4 is a guide electromagnetic valve, and its structure mainly is made up of pilot valve and main valve, and main valve adopts rubber sealing structure.In the time of normal, movable core is sealed the pilot valve mouth, valve pocket internal pressure balance, primary valve envelope valve.When coil electricity, produce electromagnetic force movable core is sucted, the medium self-conductance valve port in the main valve chamber leaks, and so that produce pressure differential, diaphragm or valve cup are held up rapidly, and primary valve is opened, and valve just has been path.Work as coil blackout, magnetic field disappears, and movable core resets, the confined bed valve port, and after pilot valve and the main valve chamber internal pressure balance, valve is again closes normal position.
The specific embodiment five: specify present embodiment below in conjunction with Fig. 2.The difference of the present embodiment and the specific embodiment one is: described first driving circuit for electromagnetic valve 5 is made up of resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, positive-negative-positive triode Q1, No. two positive-negative-positive triode Q2, NPN type triode Q3, No. two NPN type triode Q4, No. three NPN type triode Q5, No. four NPN type triode Q6 and electrolyte capacitance C
The emitter stage of one end of resistance R 1, an end of resistance R 2, a positive-negative-positive triode Q1, the emitter stage of No. two positive-negative-positive triode Q2 are connected to DC voltage+VCC jointly,
The other end of resistance R 1 respectively with the base stage of No. two positive-negative-positive triode Q2, the colelctor electrode of a NPN type triode Q3 links to each other, the colelctor electrode of No. two positive-negative-positive triode Q2 links to each other with the colelctor electrode of No. four NPN type triode Q6, the open signal controlling output of control circuit 6 links to each other with an end of resistance R 7, the other end of resistance R 7 links to each other with the base stage of a NPN type triode Q3, the emitter stage of a NPN type triode Q3 respectively with an end of resistance R 3, the base stage of No. three NPN type triode Q5 links to each other
The other end of resistance R 2 respectively with the base stage of a positive-negative-positive triode Q1, the colelctor electrode of No. two NPN type triode Q4 links to each other, the colelctor electrode of a positive-negative-positive triode Q1 links to each other with the colelctor electrode of No. three NPN type triode Q5, the close signal controlling output of control circuit 6 links to each other with an end of resistance R 8, the other end of resistance R 8 links to each other with the base stage of No. two NPN type triode Q4, the emitter stage of No. two NPN type triode Q4 respectively with an end of resistance R 4, the base stage of No. four NPN type triode Q6 links to each other
The recheck signal controlling output of control circuit 6 is connected with the emitter stage of the emitter stage of the other end of resistance R 4, No. four NPN type triode Q6, No. three NPN type triode Q5, the other end of resistance R 3, an end of resistance R 6, an end of resistance R 5 and the end of electrolyte capacitance C respectively, the other end of resistance R 6 is connected with an end of resistance R 9, the other end of the other end of the other end of resistance R 9, resistance R 5 and electrolyte capacitance C is common to be connected and ground connection
The colelctor electrode of a positive-negative-positive triode Q1 is connected with an end of solenoid in first magnetic valve 4 with the tie point of the colelctor electrode of No. three NPN type triode Q5, and the colelctor electrode of No. two positive-negative-positive triode Q2 is connected with the other end of solenoid in first magnetic valve 4 with the tie point of the colelctor electrode of No. four NPN type triode Q6.
First driving circuit for electromagnetic valve 5 drives the opening and closing of first magnetic valve 4, and points out the open and close state of valve simultaneously.
When open signal controlling output that generates when control circuit 6 and close signal controlling output were low level, first magnetic valve 4 cut out, and at this moment, recheck signal controlling output is a low level;
The open signal controlling output that generates when control circuit 6 is high level, when close signal controlling output is low level, the power supply of first magnetic valve, 4 forwards, first magnetic valve 4 is opened, at this moment, if recheck signal controlling output is a high level, represent that first magnetic valve 4 is in the normal opening procedure,, represent that first magnetic valve 4 opened if recheck signal controlling output is a low level;
The close signal controlling output that generates when control circuit 6 is high level, when open signal controlling output is low level, first magnetic valve 4 is oppositely powered, first magnetic valve 4 cuts out; At this moment,, represent that first magnetic valve 4 is in the closed procedure of normal pass,, represent that first magnetic valve 4 cut out if recheck signal controlling output is a low level if recheck signal controlling output is a high level.
The specific embodiment six: specify present embodiment below in conjunction with Fig. 3.The difference of the present embodiment and the specific embodiment one is: it also comprises second magnetic valve 17 and second driving circuit for electromagnetic valve 18, second magnetic valve 17 is separately positioned on the outlet pipe 16 of radiator, the driving signal output part of control circuit 6 links to each other with the driving signal input of second driving circuit for electromagnetic valve 18, and second driving circuit for electromagnetic valve 18 drives 17 actions of second magnetic valve by electromagnetic force.
Present embodiment has increased by second magnetic valve 17 and second driving circuit for electromagnetic valve 18 on the basis of the specific embodiment one, adopt the described device of present embodiment, by the flow of contrast water inlet pipe 15 with outlet pipe 16, can occur under the situation of explosion at heating equipment, automatically close outlet pipe 16, hydraulic pressure former thereby cause the problem that hot water refluxes and overflows in the outlet pipe pipe prevent owing to can effectively prevent the drainage that heating installation occurs because of explosion.
The specific embodiment seven: specify present embodiment below in conjunction with Fig. 4.The difference of the present embodiment and the specific embodiment one or the specific embodiment six is: it also comprises LCD display 13, and the demonstration signal output part of control circuit 6 links to each other with the demonstration signal input part of LCD display 13.
Present embodiment is replenishing the specific embodiment one or the specific embodiment six, adopt the described a kind of digital heat meter that can economize on water of present embodiment, have Presentation Function, LCD display 13 can show successively totally with a series of other indicative symbols such as hot metering, temperature measurement, calendar informations.
The specific embodiment eight: specify present embodiment below in conjunction with Fig. 5.The difference of the present embodiment and the specific embodiment seven is: it also comprises warning circuit 14, and the alarm signal output ends of control circuit 6 links to each other with the alarm signal input of warning circuit 14.
Present embodiment is to the replenishing of the specific embodiment seven, and adopts the described a kind of digital heat meter that can water saving of present embodiment, has prompt functions, and when power voltage insufficient or maloperation, described warning circuit 10 can send alarm.Water flow in the outlet pipe of flow of inlet water in the water inlet pipe of radiator and radiator compares, and when uneven as if the water-in and water-out flow, SCM system sends alarm signal.
The described a kind of digital heat meter that can water saving of present embodiment has self-checking function, no matter whether uses, and heat meter can regularly carry out oneself detection, in case first magnetic valve 4 gets rusty, if any failure alarm circuit 10 prompting that gives the alarm.
Claims (8)
1. anti-digital heat meter that leaks, it comprises first flow sensor (1), first temperature sensor (2), A/D change-over circuit (3), first magnetic valve (4), first driving circuit for electromagnetic valve (5), control circuit (6), memory (7), power-supplying circuit (8), flow collection circuit (9) and temperature collection circuit (10), first flow sensor (1), first temperature sensor (2) and first magnetic valve (4) are separately positioned on the water inlet pipe (15) of radiator, the voltage output end of power-supplying circuit (8) links to each other with the voltage input end of control circuit (6), the data storage input/output terminal of control circuit (6) links to each other with the data storage I/O of memory (7), the signal output part of first flow sensor (1) links to each other with a signal input part of flow collection circuit (9), the signal output part of first temperature sensor (2) links to each other with a signal input part of temperature collection circuit (10), the signal output part of flow collection circuit (9), the signal output part of temperature collection circuit (10) links to each other with a signal input part of A/D change-over circuit (3) respectively, the sampled signal output of A/D change-over circuit (3) links to each other with the sampled signal input of control circuit (6), the driving signal output part of control circuit (6) links to each other with the driving signal input of first driving circuit for electromagnetic valve (5), first driving circuit for electromagnetic valve (5) drives first magnetic valve (4) action by electromagnetic force, it is characterized in that: further comprising second flow sensor (11) and second temperature sensor (12), second flow sensor (11) is separately positioned on the outlet pipe (16) of radiator with second temperature sensor (12), the signal output part of second flow sensor (11) links to each other with another signal input part of flow collection circuit (9), and the signal output part of second temperature sensor (12) links to each other with another signal input part of temperature collection circuit (10).
2. a kind of anti-digital heat meter that leaks according to claim 1, it is characterized in that: described control circuit (6) adopts chip microcontroller.
3. a kind of anti-digital heat meter that leaks according to claim 1, it is characterized in that: that described memory (7) adopts is EEPROM.
4. a kind of anti-digital heat meter that leaks according to claim 1, it is characterized in that: the type of described first magnetic valve (4) is a water liquid guide electromagnetic valve.
5. a kind of anti-digital heat meter that leaks according to claim 1, it is characterized in that: described first driving circuit for electromagnetic valve (5) is by resistance (R1), resistance (R2), resistance (R3), resistance (R4), resistance (R5), resistance (R6), resistance (R7), resistance (R8), resistance (R9), a positive-negative-positive triode (Q1), No. two positive-negative-positive triodes (Q2), a NPN type triode (Q3), No. two NPN type triodes (Q4), No. three NPN type triodes (Q5), No. four NPN type triodes (Q6) and electrolyte capacitance (C) are formed
The emitter stage of the emitter stage of one end of one end of resistance (R1), resistance (R2), a positive-negative-positive triode (Q1), No. two positive-negative-positive triodes (Q2) be connected to jointly DC voltage (+VCC),
The other end of resistance (R1) respectively with the base stage of No. two positive-negative-positive triodes (Q2), the colelctor electrode of a NPN type triode (Q3) links to each other, the colelctor electrode of No. two positive-negative-positive triodes (Q2) links to each other with the colelctor electrode of No. four NPN type triodes (Q6), the open signal controlling output of control circuit (6) links to each other with an end of resistance (R7), the other end of resistance (R7) links to each other with the base stage of a NPN type triode (Q3), the emitter stage of a NPN type triode (Q3) respectively with an end of resistance (R3), the base stage of No. three NPN type triodes (Q5) links to each other
The other end of resistance (R2) respectively with the base stage of a positive-negative-positive triode (Q1), the colelctor electrode of No. two NPN type triodes (Q4) links to each other, the colelctor electrode of a positive-negative-positive triode (Q1) links to each other with the colelctor electrode of No. three NPN type triodes (Q5), the close signal controlling output of control circuit (6) links to each other with an end of resistance (R8), the other end of resistance (R8) links to each other with the base stage of No. two NPN type triodes (Q4), the emitter stage of No. two NPN type triodes (Q4) respectively with an end of resistance (R4), the base stage of No. four NPN type triodes (Q6) links to each other
The recheck signal controlling output of control circuit (6) respectively with the other end of resistance (R4), the emitter stage of No. four NPN type triodes (Q6), the emitter stage of No. three NPN type triodes (Q5), the other end of resistance (R3), one end of resistance (R6), one end of resistance (R5) is connected with an end of electrolyte capacitance (C), the other end of resistance (R6) is connected with an end of resistance (R9), the other end of resistance (R9), the other end of the other end of resistance (R5) and electrolyte capacitance (C) is common to be connected and ground connection
The colelctor electrode of a positive-negative-positive triode (Q1) is connected with an end of solenoid in first magnetic valve (4) with the tie point of the colelctor electrode of No. three NPN type triodes (Q5), and the colelctor electrode of No. two positive-negative-positive triodes (Q2) is connected with the other end of solenoid in first magnetic valve (4) with the tie point of the colelctor electrode of No. four NPN type triodes (Q6).
6. a kind of anti-digital heat meter that leaks according to claim 1, it is characterized in that: further comprising second magnetic valve (17) and second driving circuit for electromagnetic valve (18), second magnetic valve (17) is separately positioned on the outlet pipe (16) of radiator, the driving signal output part of control circuit (6) links to each other with the driving signal input of second driving circuit for electromagnetic valve (18), and second driving circuit for electromagnetic valve (18) drives second magnetic valve (17) action by electromagnetic force.
7. according to claim 1 or 6 described a kind of anti-digital heat meters that leak, it is characterized in that: further comprising LCD display (13), the demonstration signal output part of control circuit (6) links to each other with the demonstration signal input part of LCD display (13).
8. a kind of anti-digital heat meter that leaks according to claim 7 it is characterized in that: further comprising warning circuit (14), and the alarm signal output ends of control circuit (6) links to each other with the alarm signal input of warning circuit (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201276514U CN201615548U (en) | 2010-03-11 | 2010-03-11 | Water leakage-proof digital heatmeter |
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| CN2010201276514U CN201615548U (en) | 2010-03-11 | 2010-03-11 | Water leakage-proof digital heatmeter |
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| CN201615548U true CN201615548U (en) | 2010-10-27 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734864A (en) * | 2012-07-16 | 2012-10-17 | 威海震宇智能科技有限公司 | Remote automatic water stealing and leakage prevention control system |
| CN103363582A (en) * | 2012-03-28 | 2013-10-23 | 王志强 | Integral waterproof type building heat supply computerized control unit |
| CN104697040A (en) * | 2013-12-08 | 2015-06-10 | 王玉森 | Automatic flow control device for water heating system and making method thereof. |
| CN104807074A (en) * | 2015-05-15 | 2015-07-29 | 唐山现代工控技术有限公司 | Water loss preventing method and device for heat supply pipe network |
| CN105605668A (en) * | 2016-03-08 | 2016-05-25 | 成都众山科技有限公司 | Water-saving heat meter with convenience in remote monitoring |
| CN105757781A (en) * | 2016-03-08 | 2016-07-13 | 成都众山科技有限公司 | Water-saving type metering device |
| CN105864873A (en) * | 2016-04-19 | 2016-08-17 | 上海浪超电子电器有限公司太仓分公司 | Precise controllable heat supply radiator |
| CN105938026A (en) * | 2016-06-02 | 2016-09-14 | 大连环岛仪表有限公司 | Ultrasonic calorimeter with water leakage alarm function |
| CN110793731A (en) * | 2019-10-08 | 2020-02-14 | 承德龙志达智能仪器仪表科技有限公司 | Wireless remote transmission heat meter system with leakage detection function |
-
2010
- 2010-03-11 CN CN2010201276514U patent/CN201615548U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363582A (en) * | 2012-03-28 | 2013-10-23 | 王志强 | Integral waterproof type building heat supply computerized control unit |
| CN103363582B (en) * | 2012-03-28 | 2016-04-06 | 王志强 | Heat supply meter control unit before integral waterproofing type building |
| CN102734864A (en) * | 2012-07-16 | 2012-10-17 | 威海震宇智能科技有限公司 | Remote automatic water stealing and leakage prevention control system |
| CN104697040A (en) * | 2013-12-08 | 2015-06-10 | 王玉森 | Automatic flow control device for water heating system and making method thereof. |
| CN104807074A (en) * | 2015-05-15 | 2015-07-29 | 唐山现代工控技术有限公司 | Water loss preventing method and device for heat supply pipe network |
| CN105605668A (en) * | 2016-03-08 | 2016-05-25 | 成都众山科技有限公司 | Water-saving heat meter with convenience in remote monitoring |
| CN105757781A (en) * | 2016-03-08 | 2016-07-13 | 成都众山科技有限公司 | Water-saving type metering device |
| CN105864873A (en) * | 2016-04-19 | 2016-08-17 | 上海浪超电子电器有限公司太仓分公司 | Precise controllable heat supply radiator |
| CN105864873B (en) * | 2016-04-19 | 2018-10-23 | 太仓市微贯机电有限公司 | A kind of controllable precise formula heating radiator |
| CN105938026A (en) * | 2016-06-02 | 2016-09-14 | 大连环岛仪表有限公司 | Ultrasonic calorimeter with water leakage alarm function |
| CN110793731A (en) * | 2019-10-08 | 2020-02-14 | 承德龙志达智能仪器仪表科技有限公司 | Wireless remote transmission heat meter system with leakage detection function |
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