CN2354123Y - Cold, heat quantity measuring meter - Google Patents

Abstract

The utility model relates to a cold and heat quantity measuring meter, comprising a water meter 7 arranged on a water inlet pipe or a water returning pipe, and platinum thin-film resistor temperature sensors 5 and 9 which are respectively arranged on the water inlet pipe and the water returning pipe, and the inner part of the functional module 4 provided together with the water meter 7 is provided with an absolute value amplifying circuit. The utility model can be used as a heating meter used for users in the central heating residential construction and can be used in the central cooling or cold-heating system. Because of the simplification of the arrangement requirement, forced specification does not exist on the water inlet, water returning, high-temperature and low-temperature position, and the utility model is convenient for the reforming construction of the original old building central heating system without the meter.

Description

Hot-cold measurer

The utility model belongs to instrument, particularly the instrument of covil construction central heating and cooling meterage.

In public heating system, for to each resident family meterage respectively, states such as Europe, Japan already general implementation used various thermal metering instrument.The combined integral heat energy table of the Exemper Heat distribution meter of the last word of the nineties such as Germany, Sensonic heat integrator instrument and heat energy table, Sonogyr ultrasonic heat energy meter, Zenner company, and the B-W50 type calorimeter heat energy table of Korea S's generation and Precision Co., Ltd or the like.The metering of heat rejection energy when above-mentioned heat energy table all only is used to heat.And they are installed in the piping system or water inlet or backwater have all been stipulated the position, measure the survey sensor of water inlet (high temperature) and backwater (low temperature) and indicate with different colours respectively, and are not replaceable, thereby the installation requirement of strictness is arranged.Above-mentioned hotlist all can not use when central cooling.

The purpose of this utility model provides a kind of overlapping in the metering system one can be used for central heating system, can be used for central cooling system again.

Principal feature of the present utility model is mounted in the water meter 7 on water inlet pipe or the return pipe, is contained in the platinum film resistor temperature probe 5 and 9 on water inlet pipe and the return pipe respectively, in the functional module 4 that is installed together with water meter 7 an absolute value amplifying circuit is arranged.

The utility model both can use with heating meter as the family in the residential housing of only central heating, also can central cooling or changes in temperature two for system in use.Because the simplification of installation requirement is not to having compulsory regulation on water inlet, backwater, high temperature, the low temperature position.Greatly facilitate the construction in the old building central heating system that gauging table was not installed is originally transformed.

Description of drawings

Fig. 1 is the structural representation of hot-cold measurer

1---loam cake 2---watchcase 3---LCD 4---circuit function module 5---temperature probe 6---pipe adapter 7---magnetic biography dry cold hot water gauge 8---ball valve 9---temperature probe 10---power supply 11---power lead 12---dry-reed tube switch 13---magnet among the figure

Below in conjunction with accompanying drawing in detail principle of work of the present utility model is described in detail.

Comprise magnetic pass dry type flowmeter 7, temperature probe 5 and 9 and the system of cold and hot amount integral operation display in, the platinum film resistor temperature sensor 5 and 9 of two pairings records temperature poor of into water and backwater respectively, though this difference be on the occasion of or negative value, do not need the peripheral hardware switch, all passing through absolute value amplifying circuits in the module 4 cold and hot temperature signal that automaticallyes switch is the absolute value of the temperature difference.Traffic pulse together with exporting as the dry-reed tube switch of flow sensor enters the double integrator computing circuit and carries out computing.Demonstrate heat supply or cooling value then in the each household practicality.Become the foundation of meterage.

Magnetic passes dry-type meter 7 and is installed on the pipeline, and when hot water or cold water (water inlet or backwater) during by it, water makes the turbine rotation.The rotation of turbine by a magnet steel connector make with water in turbine rotate synchronously with the register gear that copper lid separates, through speed change, a little magnet 13 is installed on the pointer in every one week of premium on currency.Dry reed switch 12 open in usual is installed on the watermeter shell.Each up-flow amount, the dry reed switch adhesive is connected once, obtains traffic pulse, and meanwhile, two platinum film resistor temperature probes 5 and 9 that are installed in respectively in the into water and water return pipeline record the into temperature signal of water and backwater.These three electric signal carry out computing, processing in circuit function module 4, kilowatt hour of every meter provides a count pulse to LCD 3, and LCD 3 shows accumulated result.The output data of circuit function module 4 can teletransmission.LCD 3 has the failure data protection function.No matter be that cold or heat all are the unit metering with the megawatt hour.Circuit function module 4 comprises rectification and mu balanced circuit, can directly go work to civil power by transformer 10 and power lead 11, also powered battery can be installed in watchcase.Watchcase 2 is assembled into an integral body securely to compactnesses such as water meter 7, functional module 4, LCD 3, transformers 10.Table cover 1 and watchcase 2 are tight clampings, and can use lead sealing.The table tops has window with cover one by one, opens window lid, the metering numerical value that just can the direct-reading hot-cold measurer records.

It should be noted that the particular circuit configurations of circuit module 4 especially.Two thermometric platinum film resistor device output signals are proportional to current offset, and reference voltage and current offset voltage are designed to the geometric ratio variation.Reduced because of the unstable drift that causes of supply voltage.The difference of two temperature measurement signals adopts the absolute value amplifying circuit hot and cold metering signal that automaticallyes switch.No matter be on the occasion of or negative value, amplify output and be absolute value, removed the peripheral hardware switch from.Obtaining the circuit of calorie value from flow signal and temperature difference integral operation, adopting the double integrator compute mode of degree of precision.Circuit design has the automatic zero set (AZS) circuit, has reduced the temperature drift of circuit semiconductor device.In addition, designed rectification and mu balanced circuit in module, the power supply of functional module both can be that battery also can be the civil power of coming from the power transformer conversion.

Claims (2)

1, hot-cold measurer comprises the water meter 7 that is installed on water inlet pipe or the return pipe, is contained in the platinum film resistor temperature probe 5 and 9 on water inlet pipe and the return pipe respectively, and an absolute value amplifying circuit is arranged in the functional module 4 that it is characterized in that being installed together with water meter 7.

2, by the described hot-cold measurer of claim 1.It is characterized in that said temperature probe 5 and 9, one are installed on the pipe adapter 6 that connects together with water meter, another is installed on the ball valve 8.

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