CN2457584Y

CN2457584Y - Heat meter heating safety protector

Info

Publication number: CN2457584Y
Application number: CN 00266364
Authority: CN
Inventors: 李涛; 张新华
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-22
Filing date: 2000-12-22
Publication date: 2001-10-31
Anticipated expiration: 2010-12-22

Abstract

The utility model relates to a heat meter with a safety protector, which comprises a flowmeter, a thermometer, an IC card reading and writing device, an integrator, a safety protecting module and an electromagnetic valve. The meter has IC card discriminating function, causing metering data not to be artificially rewritten, and power not to be off and disappear; exception handling function of temperature difference can prevent temperature measuring element position from being artificially moved in a water return pipe, which causes abnormal temperature difference to be reduced, to stop the occurrence of evasiveness phenomenon; exception handling function of flow quantity can prevent water pipes from being artificially crossed a meter to a bypass; under-voltage protecting function prevents batteries from being artificially removed, causing hot water to flow but charging to stop; except a battery box, the whole machine is sealed, to prevent from being disassembled artificially, and to realize the safety protecting purpose in deed.

Description

Heat meter with safety apparatus

The utility model belongs to the improvement that the heat metering utensil is a heat meter.

The heat metering of branch family is the policy that nation-building portion has just released, but country does not still have unified technical manual at present.Though some unit develops, the product that can see on the market seldom, its function of some imported product is less, costs an arm and a leg.Press for inexpensive homemade heat meter on the market.Simultaneously, how stopping the tax evasion phenomenon, also is to need the problem of solution in the lump at present.

The utility model purpose provides the heat meter that a kind of multi-functional, low-power consumption, the metering of high precision heat particularly have safety apparatus.

The utility model comprises flowmeter, thermometer, IC-card read write line, integraph and solenoid valve composition, it is characterized in that between integraph and solenoid valve, installing a safety precaution module, this safety precaution module is made up of single-chip microcomputer, storer, undervoltage detection circuit and driving circuit for electromagnetic valve, IC-card reads and writes data, temperature measuring data, flow measuring data send single-chip microcomputer through integraph, simultaneously, the under-voltage testing circuit send single-chip microcomputer with the supply voltage data, and single-chip microcomputer send driving circuit for electromagnetic valve that solenoid valve is controlled control signal.

The utility model embodiment accompanying drawings is as follows:

Fig. 1, have the heat meter general structure block diagram of safety apparatus,

The connection layout of Fig. 2, safety precaution module and mainboard, solenoid valve,

Fig. 3, safety precaution inside modules structured flowchart,

Fig. 4, safety precaution module electrical schematic diagram.

Embodiment

As Figure 1-3, this heat meter comprises flowmeter, thermometer, the IC-card read write line, integraph and solenoid valve are formed, a safety precaution module is installed between integraph and solenoid valve, this module is by single-chip microcomputer, storer, undervoltage detection circuit and driving circuit for electromagnetic valve are formed, this module single-chip microcomputer is connected according to rs-232 standard with integraph, see shown in Figure 2, IC-card reads and writes data, temperature measuring data, flow measuring data send single-chip microcomputer through integraph, simultaneously, the under-voltage testing circuit send single-chip microcomputer with the supply voltage data, and single-chip microcomputer send driving circuit for electromagnetic valve with control signal and solenoid valve is controlled.

The concrete electrical schematic diagram of safety precaution module sees that shown in Figure 4 (flowmeter, thermometer, IC-card read write line and integraph are prior art, concrete electrical schematic diagram slightly), this module is a single-chip minimum system, and it is made up of 89C51 single-chip microcomputer, EEPROM93C66, undervoltage detection circuit X25045, driving circuit for electromagnetic valve.When this module is found data exception (temperature difference is improper between as water inlet pipe, return pipe reduces, heat meter battery dismantle outage etc.), directly the control electromagnetic valve barrier gate stops heat supply.

The utility model advantage: this table has IC-card and screens function, makes metering data such as the input amount of money, payment The amount of money and remaining sum etc. are not artificially rewritten, and can power down not disappear yet; Have temperature difference abnormality processing function, prevent The people is the position of moving water inlet pipe or return pipe temperature element, causes the improper temperature difference to reduce, and stops tax evasion now Resemble generation; Have the Traffic Anomaly processing capacity, anti-antipriming pipe people is for striding the table bypass; Has the low-voltage protection merit Can, prevent the people for the battery of dismantling, cause hot water according to stream charging stop; Except battery case, the complete machine sealing, Prevent artificial dismounting, really realize the safety precaution purpose, this safety precaution functional module can be used as an independence Element is welded on the mainboard, is applicable to the repacking of various heat meters.

Claims

1, a kind of heat meter with safety apparatus, comprise flowmeter, thermometer, the IC-card read write line, integraph and solenoid valve are formed, it is characterized in that between integraph and solenoid valve, installing a safety precaution module, this safety precaution module is by single-chip microcomputer, storer, undervoltage detection circuit and driving circuit for electromagnetic valve are formed, IC-card reads and writes data, temperature measuring data, flow measuring data send single-chip microcomputer through integraph, simultaneously, the under-voltage testing circuit send single-chip microcomputer with the supply voltage data, and single-chip microcomputer send driving circuit for electromagnetic valve that solenoid valve is controlled control signal.