CN201163196Y - Fixed flux temperature difference type fare register - Google Patents

Abstract

The utility model relates to a temperature difference-type fare register of the central air conditioner of a constant flow system. The constant flow temperature difference-type fare register comprises a core calculating unit, wherein the core calculating unit is connected with a water inlet/outlet temperature collecting module; the outside of the collecting module is connected with an integrated digital temperature sensor or an analog temperature sensor; the output end of the collecting module is respectively connected with two corresponding I/O interfaces of a CPU inside a core CPU module; and a constant flow switch signal adopts a default fixed value mode, or flow is judged to be a fixed value or zero according to the temperature difference between an inlet and an outlet. The temperature difference-type fare register abandons a charging mode according to which the prior fare register adopts a flowmeter to complete charging; meanwhile, the fare register carries out detection of a flow switch signal and makes use of elements such as temperature difference, constant flow parameter and time so as to obtain the consumption calculated energy of a measuring area through integral; moreover, the charging method of the fare register can obtain accurate and reliable equivalent energy and accurate collection of measuring data, thereby realizing central air conditioner charging based on requirements and quantity, and ensuring a scientific and reasonable charging mode and convenient use.

Description

The fixed flux temperature differential-type taximeter

(1) technical field:

The utility model relates to a kind of central air conditioner taximeter, particularly relates to a kind of temperature difference type taximeter of central air conditioner of constant flow water system.

(2) background technology:

Raising day by day along with people's living standard, central air conditioner is generally used, because central air conditioner tradition charging way is multifarious, though they have solved the charging problem of central air conditioner user under different behaviours in service, central air conditioner metering centralized management and continuous data hold function have been realized, but metering method also exists limitation to a certain degree, do not have abundant realization to charge as required and pass through that careful science calculates charging according to quantity, be unfavorable for that the central air conditioner user is in line with the more positive reduction energy resource consumption of economy principle, transparent consumption.Chinese invention patent application 200510034777.5 (publication number CN 1831502A, open day on September 13rd, 2006) discloses a kind of calorimeter with temp sensor, is made up of calculating instrument and temperature sensor.This calorimeter is applied to the heat metering field, measures the indoor heat consumption of user when particularly suitable adopts household metering.This calorimeter need not measured the hot water flow in the radiator fin, only needs to measure that heating radiator (pipe) group is advanced, return water temperature and environment temperature, uses thermal technology's theory, calculates the heat of using of explicit user also by built-in computing formula and operation program.The absolute value of the heating load that the just user that it is measured uses, for how to realize charge by heating load, right to make decision, power to make decision all are covert unknown numbers for the public, in other words, it does not fundamentally promptly provide a science, reasonable, fair heating charge problem from the angle of supplier and party in request.

Chinese invention patent application 03150444.2 (discloses day on February 23rd, 2005, publication number CN1584527A) a kind of central air conditioner charging automatic control system is disclosed, it comprises and is installed in the zone of will chargeing: a) working time sensor, be used to add up accumulative total service time of central air conditioner; B) be installed in water temperature sensor and flowmeter on the water-main; C) be installed in temperature sensor on the advancing of user's fan coil distributive pipe, the water return pipeline respectively, utilize the temperature difference of water inlet, backwater to come the loss of calculating energy; C) be installed in flowmeter on the inlet channel of user's fan coil distributive pipe, be used for the size of the chilled water/hot water flow of measurement flow warp; D) the pulse ammeter on each low-voltage distribution loop; The said equipment links to each other with the input-output apparatus of controller, forms Fee Schedule by central controlling computer image data.Adopt the shortcoming of a maximum of flow sensor to increase the product structure cost exactly, limited it to a certain extent and implemented to promote.

Present its rates ground of many taximeters there is much controversy, and causes that the consumer is discontented, and there is very big drawback in the problem that they fundamentally do not solve as required, charge according to quantity, is unfavorable for saving energy and reduce the cost, and is unfavorable for the long term growth of environmental protection and society.Therefore, implementing central air conditioner charges extremely urgent according to quantity, as required.

(3) utility model content:

Utility model purpose: at a kind of fixed flux temperature differential-type taximeter of the not enough proposition of prior art, the abandoning tradition taximeter adopts the charging way of flowmeter, employing detects flow switch signal, utilize the temperature difference, constant flow parameter and several key elements of time, integration obtains the consumption calculations energy of this metering region, what the utility model charging method obtained works as energy accurately and reliably, realize central air conditioner as required, charge according to quantity, the collection of continuous data is accurate, charging way is scientific and reasonable, and is easy to use.

The technical solution adopted in the utility model:

A kind of fixed flux temperature differential-type taximeter, contain a core calculations unit, this core calculations unit comprises the core CPU module, storage module during prison, communication module and power module, power module provides working power for message accounting, the control interface of storage module during prison, data-interface and read-write synchronous clock interface connect the corresponding control interface or the I/O interface of core CPU module respectively, the serial communication interface of CPU connects the uplink communication module in the core CPU module, connect host computer by the uplink communication module, described core calculations unit also contains into, the leaving water temperature acquisition module, advance, outside integrated digital temperature sensor or the analog temperature sensor of connecting of leaving water temperature acquisition module, advance, the output terminal of leaving water temperature acquisition module connects two the corresponding I/O interfaces of CPU in the core CPU module respectively, collection is advanced, leaving water temperature signal, constant flow switching signal adopt the acquiescence deterministic model or by advancing, the outlet temperature difference judges that flow is definite value or zero.

Described central air conditioner message accounting, the core calculations unit contains a flow switching signal identification module, the input end connection traffic signal identification switch device of flow switch signal identification module, the corresponding corresponding I/O interface that connects CPU in the core CPU module of the output terminal of flow switch signal identification module (CHECK2) is realized the collection of flow switch signal; The flow switch signal collecting unit can be cancelled and adopt default mode.

Described central air conditioner message accounting, message accounting contains valve control/detection module, to realize arrearage forbidding and working service; Valve control/detection module adopts optocoupler 521 to realize the strong and weak electricity isolation, the input end of valve control/detection module connects the valve working power supply, and the isolation detection output terminal (CHECK1) of valve control/detection module connects the I/O interface of CPU in the core CPU module; The input control end (CONT1) of valve control/detection module connects one group of I/O interface of CPU, the control output end of valve control/detection module (OUT1) control linkage by-pass valve control work ring current.

Described central air conditioner message accounting, uplink communication module adopt RS-485 bus communication mode, perhaps adopt CAN bus or BUS bus communication mode, perhaps adopt wireless communication mode.

Described central air conditioner message accounting, the core CPU module is provided with the display module interface, and the core calculations unit is connected with on-the-spot display module by the display module interface, realizes that Information Field shows.

Positive beneficial effect of the present utility model:

1, the various flowmeter of the utility model taximeter abandoning tradition, and adopted water flow switch that flow signal is detected, accurate measurement is reliable, can satisfy the customer requirement of " using as required; charge according to quantity ", lower the influence of factors such as air-conditioning water quality is bad greatly, reduced equipment cost and maintenance cost, have fabulous application value metering outfit metering result.Promptly having reduced cost has and has improved product competitiveness, can promote user's reasonable consumption again, and energy savings reduces the air-conditioning equipment load, prolongs service life of equipment.

2, each metering units preparation one this message accounting of cover of the utility model, each metering units size can flexible configuration, message accounting comprises that basic modules such as CPU module, when prison storage module, uplink communication module and power module form, and can realize that metrical information forever preserves; Reasonable in design, use, easy to maintenance is installed simply; Be provided with the uplink communication interface and be connected with host computer, can be uploaded to the centralized automatic meter-reading management system, charging is accurate, the metering data information holding time is long.

3, the utility model taximeter passes through the porch preparation electrically operated valve at the central air conditioner of each metering units, can realize the arrearage disable function: directly assign forbidding and close this porch electrically operated valve by administrative center's computer, cut off the center air-condition circle water of this metering units, thereby realize Long-distance Control.Valve control/detection module control mode can adopt schemes such as controllable silicon, relay.

(4) description of drawings:

Fig. 1: the utility model message accounting unit module arrangement plan

Fig. 2: the utility model charging method work-based logic figure

Fig. 3: module diagram is formed in the utility model message accounting core calculations unit

Fig. 4: the utility model message accounting core CPU modular circuit schematic diagram

Fig. 5: storage module circuit theory diagrams during the utility model message accounting prison

Fig. 6: the utility model message accounting valve control/detection module circuit theory diagrams

Fig. 7: the utility model message accounting communication module circuit theory diagrams

Fig. 8: the utility model message accounting power module

Fig. 9: the utility model message accounting Inlet and outlet water temperature collect module

Figure 10: the utility model message accounting display interface module

Figure 11: the utility model message accounting flow switch signal identification module

Figure 12: two of the utility model message accounting valve control/detection module circuit theory diagrams

Figure 13: the utility model message accounting BUS bus uplink communication module

Figure 14: the utility model message accounting CAN bus uplink communication module

Figure 15: the utility model charging method and device are used synoptic diagram one

Figure 16: the utility model message accounting is used synoptic diagram two

Figure 17: the utility model charging method and device are used synoptic diagram three

(5) embodiment:

Embodiment one: referring to Fig. 1, the utility model taximeter comprises a core calculations unit, water-in and water-out temperature collecting device and flow signal acquisition device; Fig. 3 is for forming each functional module of message accounting core calculations unit, storage module, flow switch signal identification module, Inlet and outlet water temperature collect module, communication module, power module when including core CPU module, valve control/detection module, prison, display interface module.

Core CPU modular circuit principle schematic is seen Fig. 4, storage module circuit theory synoptic diagram when Fig. 5 is prison, and Fig. 7 is a kind of embodiment of communication module, wherein U1 is CPU, memory when U2 is prison, U3 is a uplink communication RS485 bus communication chip.Central processing unit in the core CPU module (CPU) can adopt 89S52, AT89C52, P89C54BP, P89C58A,, MC68HC11A8, MC68HC11E9, MC68HC16, PIC16C877A, EM78P447, MSP430F147, MSP430F435, E78C52D, E78E58B and follow-up release thereof compatible chip in any one, four I/O port WDOG of CPU, W_SO, W_CLK, W_DATA respectively with when prison storage module corresponding interface WDOG, W_SO, W_CLK, W_DATA be connected, these interfaces can be defined arbitrarily by software; The reset terminal of CPU (RST) is connected with the reset terminal (RST) of monitor; The RXD of CPU, TXD are connected with corresponding interface RXD, the TXD of uplink communication module respectively, and message accounting connects host computer by the uplink communication module, and " the half duplex communication receiving/transmission control method and the device " of our company's patent applied for adopted in the control of communication.Fig. 8 is for being present embodiment message accounting power module circuitry principle schematic, and wherein U9 is a three terminal regulator, and power module provides working power for whole message accounting.

The present embodiment scene is provided with central air conditioner Inlet and outlet water temperature collect module, and Inlet and outlet water temperature collect module circuit theory synoptic diagram is seen Fig. 9, and the DQ1 of CPU, DQ2 are connected with corresponding interface DQ1, the DQ2 of Inlet and outlet water temperature collect module.Figure 10 is a display interface module circuit theory synoptic diagram, comprises work indication and display panel interface, and Figure 11 is the circuit theory synoptic diagram of flow switch signal identification module.

Present embodiment can be controlled by by-pass valve control/detection module realization arrearage forbidding and working service.By-pass valve control control/detection module circuit theory diagrams are seen Fig. 6.Valve control/detection module adopts optocoupler 521 to realize the strong and weak electricity isolation, the input end of valve control/detection module connects the valve working power supply, and the isolation detection output terminal (CHECK1) of valve control/detection module connects the I/O interface of core CPU module CPU; Valve control/detection module control section core is controllable silicon Q1, the input control end (CONT1) of module connects the I/O interface of CPU, control linkage by-pass valve control working power loop, the control output end of valve control/detection module (OUT1) is to realize the arrearage forbidding.

Figure 15 is for a kind of user mode reference diagram of the utility model message accounting in specifically practicing, and after message accounting work, the CPU module, is incorporated into the leaving water temperature situation again and measures to correct whether water supply signal by the flow switch signal identification module.Message accounting carries out temperature acquisition in real time, thereby obtains current real-time equipment correlation behavior information.Message accounting transmits field data by the uplink communication module, by display interface module with the current state of current metering units, Inlet and outlet water temperature, last month information such as expense show, check for the user.Storage module regularly carries out data backup memory during prison, effectively guarantees safety of data.Charge according to charging logic shown in Figure 2 simultaneously, when the user was disabled, valve Be Controlled was always closed, and cut off user's center air-condition circle water, forbade that the user uses, and removed the forbidding of this equipment until host computer.

Embodiment four: referring to Fig. 4～Figure 10, and Figure 16.The difference of present embodiment and embodiment three is: do not connect the flow switch signal identification sensor, only detect state and the Inlet and outlet water temperature difference and the charging of valve, be adapted to often carry out the application model of switch control.

Embodiment five: referring to Fig. 4, and Fig. 5, Fig. 7～Figure 11, Figure 17.Be with the difference of embodiment three: the user does not install the valve of registering one's residence, and valve control/detection module does not provide control.

Embodiment six: physical circuit and annexation be referring to Fig. 4～Fig. 6, Fig. 8～Figure 11, Figure 13, Figure 15.Device has on-the-spot display module.The difference of itself and embodiment three is to adopt BUS bus (the circuit theory synoptic diagram is referring to Figure 13) respectively, the corresponding connection of uplink communication module with other module port, among Fig. 4 the RXD of CPU, TXD respectively with Figure 13 in corresponding connection of RXD_Y, TXD_Y.

Embodiment seven: physical circuit and annexation be referring to Fig. 4～Fig. 6, Fig. 8～Figure 11, Figure 14, Figure 15.Device has on-the-spot display module.The difference of present embodiment and embodiment three is adopted the CAN bus with upper machine communication.Referring to Figure 14, the corresponding connection of uplink communication module with other module port.RST among Figure 14, ALE, CS2, RD, WR, INT_CAN, AD0-AD7 respectively with Fig. 4 in RST, the 30th pin ALE, the 12nd pin INTO (definition cancellation originally), the 17th pin/RD, the 16th pin/WR, the 13rd pin INT1 (definition cancellation originally), the corresponding connection of 39-32 pin P00-P07 of CPU.CAN controller among Figure 14 is connected with transceiver is corresponding.

Embodiment eight: physical circuit and annexation be referring to Fig. 4, Fig. 5, Fig. 7～Figure 12, Figure 15.Device has on-the-spot display module.The difference of present embodiment and embodiment three, control device adopts relay.Referring to Figure 12, gate control/detection module control section core is a relay, the input control end (CONT1) of module connects the I/O interface of CPU, the control output end one (OUT1) of valve control/detection module connects by-pass valve control working power loop, and control output end two (OUT2) connects by-pass valve control powered-down loop.

The utility model fixed flux temperature differential-type taximeter, each metering units for same central air conditioner, at Charging Detail Record unit user's air-conditioning import and export place difference mounting temperature sensor, the flow of the cold/heat transferred medium by central air conditioner is set is a certain value, and judge that by flow switch or the import and export temperature difference flow is definite value or zero, at flow is under the situation of definite value, whether the temperature difference of judging the air-conditioning import and export reaches a predefined initial value, reach in the temperature difference under the situation of initial value, utilize the heat Calculation formula under the constant flow constant state

$Q={\∫}_{\mathrm{\τ}0}^{\mathrm{\τ}1}\mathrm{k\Δhd\τ}$

Calculate the calculating energy that this central air conditioner metering units consumes, and always calculate the expense that proportion is shared central air conditioner in the energy in central air conditioner system with this calculating energy, the equivalent energy of pressing of realizing central air conditioner charges Q in the formula: the equivalent heat that discharges or absorb, J of unit or Wh; Δ h: poor at the enthalpy that advances water under the return water temperature, the J/kg of unit; τ: time, the h of unit; K: be the constant value of an appointment under constant flow water system, value is by the field measurement flow of metering object, or the nominal flow rate of metering object is determined.The span of the charging initial value that the temperature difference of user's air-conditioning import and export is predetermined does not reach in the temperature difference of user's air-conditioning import and export under the situation of predetermined initial value between 0.1 degree centigrade to 2.0 degrees centigrade, does not produce the charging value; Judging that flow is not produce the charging value under zero the situation.

Claims (5)

1, a kind of fixed flux temperature differential-type taximeter, contain a core calculations unit, this core calculations unit comprises the core CPU module, storage module during prison, communication module and power module, power module provides working power for message accounting, the control interface of storage module during prison, data-interface and read-write synchronous clock interface connect the corresponding control interface or the I/O interface of core CPU module respectively, the serial communication interface of CPU connects the uplink communication module in the core CPU module, connect host computer by the uplink communication module, it is characterized in that: described core calculations unit also contains into, the leaving water temperature acquisition module, advance, outside integrated digital temperature sensor or the analog temperature sensor of connecting of leaving water temperature acquisition module, advance, the output terminal of leaving water temperature acquisition module connects two the corresponding I/O interfaces of CPU in the core CPU module respectively, collection is advanced, leaving water temperature signal, constant flow switching signal adopt the acquiescence deterministic model or by advancing, the outlet temperature difference judges that flow is definite value or zero.

2, central air conditioner message accounting according to claim 1, it is characterized in that: the core calculations unit contains a flow switching signal identification module, the input end connection traffic signal identification switch device of flow switch signal identification module, the corresponding corresponding I/O interface that connects CPU in the core CPU module of the output terminal of flow switch signal identification module is realized the collection of flow switch signal.

3, central air conditioner message accounting according to claim 1 and 2, it is characterized in that: message accounting contains valve control/detection module, to realize arrearage forbidding and working service; Valve control/detection module adopts optocoupler 521 to realize the strong and weak electricity isolation, the input end of valve control/detection module connects the valve working power supply, and the isolation detection output terminal (CHECK1) of valve control/detection module connects the I/O interface of CPU in the core CPU module; The input control end (CONT1) of valve control/detection module connects one group of I/O interface of CPU, the control output end of valve control/detection module (OUT1) control linkage by-pass valve control work ring current.

4, central air conditioner message accounting according to claim 3 is characterized in that: the uplink communication module adopts RS-485 bus communication mode, perhaps adopts CAN bus or BUS bus communication mode, perhaps adopts wireless communication mode.

5, central air conditioner message accounting according to claim 4, it is characterized in that: the core CPU module is provided with the display module interface, and the core calculations unit is connected with on-the-spot display module by the display module interface, realizes that Information Field shows.

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