CN105650803A - Indirect measurement type central air conditioner measurement billing and charging system - Google Patents

Abstract

Disclosed is an indirect measurement type central air conditioner measurement billing and charging system. According to the system, the water temperature of a refrigerant of a central air conditioner is collected in a centralized mode, the indoor temperature of each room and the real-time working condition of each fan coil are collected separately, the data are combined with heat exchange parameters of the fan coils, and therefore the heat exchange amounts of the fan coils are obtained through calculation and serve as the measurement billing basis. Compared with a direct refrigerant measurement system, the indirect measurement type central air conditioner measurement billing and charging system has the advantage that the investment of measuring devices can be saved. Compared with the mode of billing according to the area and the time, the mode of the indirect measurement type central air conditioner measurement billing and charging system has the advantage that a more reasonable charging rule is provided. The indirect measurement type central air conditioner measurement billing and charging system can be combined with a temperature controller to form an integrated product, and no additional investment is basically required when the system is applied to buildings. The indirect measurement type central air conditioner measurement billing and charging system can be independently applied to practical billing, and can also be combined with the modes of billing according to the time and billing according to the time and levels to be used, and therefore billing choices are various, and diversified demands of various users can be conveniently met.

Description

Indirect metering type central air-conditioning metering charging charge system

Technical field

The present invention is a kind of central air-conditioning metering charge system, is a kind of management system calculating charge amount according to heat exchange amount.

Background technology

The central air-conditioning charge method passed through now mainly contains: by the area charging of area charge, by the statistics charging of on time or refrigerant valve opening time conjoint disk pipe blower fan wind speed, by the electric energy tariff of coiler fan power consumption, directly measurement cold medium flux and metering and billing of measurement actual heat exchange amount passing in and out the coiler fan refrigerant temperature difference etc. The charging way shared by area, no matter user is with less multiplex or even all identical without the central air-conditioning expense paid needed for it, it is clear that this is irrational. The method of statistics charging is relatively fair but this kind of charging method can not embody the heat exchange amount of actual consumption of user completely; Although the method for direct measuring charging and energy meter is fair and reasonable, but construction must be installed at the turnover refrigerant pipe of each blower fan coil pipe thermometer and under meter, construction workload Iarge-scale system cost height.

Summary of the invention

It is an object of the invention to provide a kind of simplicity, the charge system of indirect metering type central air-conditioning metering charging at a low price. Go out heat exchange amount by the refrigerant temperature of system, blower fan coil pipe parameter, envrionment temperature and Time Calculation, greatly reduce construction and the maintenance cost of central air-conditioning metering charging.

The technical scheme that the present invention gets is:

A kind of charge system of metering type central air-conditioning metering charging indirectly, it is characterized in that: the water supply water temperature of system concentrated collection central air-conditioning, gather the room temperature in room and the real-time working condition of blower fan coil pipe respectively, calculate the heat exchange amount of blower fan coil pipe in conjunction with the standard condition parameter of blower fan coil pipe.

Water supply water temperature collection point is positioned at water outlet place of unit cooler.

Room temperature collection is completed by temperature controller, places temperature sensor at each blower fan coil pipe return air mouth and measures acquisition.

The blower fan shelves position of blower fan coil pipe and the opening and closing of refrigerant valve pass to management server by temperature controller.

The calculation formula of heat exchange amount:

$Q={\∫}_{t1}^{t2}q\mathrm{\Δ}Tdt$

Wherein: Q is heat exchange amount, q is blower fan coil pipe unit temperature difference hot exchange power, and t1 is the time opening, and t2 is the end time, the difference of real-time supply water temperature and inlet air temperature when �� T is the work of blower fan coil pipe.

The principle of foundation of the present invention: the actual heat exchange amount of specific blower fan coil pipe is blower fan coil pipe heat exchange amount power and the function of time.

Producing heat exchange when blower fan coil pipe water intaking valve is opened and heat exchange fan opens, but actual condition and standard condition are incomplete same, its heat exchange amount power heat exchange amount under being not equal to the standard condition that its handbook provides. According to Fourier's thermal conduction law, the hot exchange power of blower fan coil pipe is directly proportional to the temperature difference, then the heat exchange amount in certain time can be calculated by following formula:

$Q={\∫}_{t1}^{t2}q\mathrm{\Δ}Tdt$

In described formula, Q is heat exchange amount, and q is blower fan coil pipe unit temperature difference hot exchange power, and t1 is the time opening, and t2 is the end time, the difference of real-time supply water temperature and inlet air temperature when �� T is the work of blower fan coil pipe.

In described calculation formula, the unit temperature difference hot exchange power q of blower fan coil pipe standard condition can find from product manual. Change if product manual does not provide, draw by following formulae discovery:

$q=\frac{q_b}{{\mathrm{\ΔT}}_b}$

Wherein, q_b: blower fan coil pipe standard condition hot exchange power, �� T_b: the blower fan coil pipe standard condition temperature difference (difference of water temperature and air themperature, get dry-bulb temperature), such as the heat exchange parameter of certain model blower fan coil pipe is as follows:

The test condition of this coiler fan is

Cooling condition: inlet air 27 DEG C of inflow temperatures 7 DEG C, if all calculated according to air intake inflow temperature, then the temperature difference is 20K.

For thermal condition: inlet air dry-bulb temperature 21 DEG C, inflow temperature 60 DEG C, then the temperature difference is 39K.

Then the unit temperature difference heat exchange capacity q calculation result of this blower fan coil pipe is such as following table:

In described calculation formula, �� T=T3-T4, wherein T3 is supply water temperature, and the water-supply pipe in circulating water system is placed a water temperature sensor assembly and measured acquisition, T4 is coiler fan inlet air temperature, places temperature sensor at each blower fan coil pipe return air mouth or obtains by temperature controller.

When the standard condition of the factors such as the layout of air-conditioning system, the installation position of blower fan coil pipe, the real work condition of unit cooler and pressure of supply water and blower fan coil pipe has difference, introduce pressure compensation coefficient k to compensate, for compensating the deviation of water inlet pressure of return water difference with standard condition. Introducing compensates then that heat exchange amount calculation formula is as follows:

$Q={\∫}_{t1}^{t2}kq\mathrm{\Δ}Tdt$

K can manually add, it is also possible to the key position in system installs respective sensor, and system generates according to formula automatically according to sensing data. Wherein affecting bigger is that pressure of supply water and pressure of return water are poor, can install hydraulic pressure sensor in system core position for this problem, such as, measure pressure of supply water P3 in unit cooler exit, measure pressure of return water P4 at the backwater place of same level height.

Can calculate by following formula according to the k that hydromeehanics pressure divergence compensates:

$k=\frac{\sqrt{P3-P4}}{\sqrt{\mathrm{\Δ}P1}}$

In described formula, �� P1 is that standard condition coil pipe enters pressure of return water difference (i.e. water resistance, unit K Pa), and �� P1 obtains in blower fan coil pipe product manual, i.e. the water resistance parameter value of blower fan coil pipe.

In described formula, P3 places the first hydraulic pressure sensor module in the outlet of circulating water system water supply pipe to measure force value, P4 be circulating water system return water pipe entrance place the 2nd hydraulic pressure sensor module measure force value, first and second hydraulic pressure sensor modules install level height identical.

More than calculating is all carry out when blower fan coil pipe water intaking valve is opened, and the switch state of usual water intaking valve all can have temperature controller to provide, or gathers separately. Owing to not producing heat exchange when water intaking valve is closed, now do not carry out calculating statistics. The different wind speed of corresponding blower fan coil pipe should calculate statistics respectively, then the heat exchange of different wind speed is carried out the cumulative heat exchange amount becoming this period.

Implementation of the present invention: central air-conditioning billing management server (), temperature controller (one, each room), water temperature sensing module (one), hydraulic pressure sensor module (two), temperature sensor assembly (one, each room).

Described water temperature sensor assembly is changed circuit by temperature inductor and A/D and is formed, and converts temperature simulation amount to numerary signal, receives central air-conditioning billing management server by network, and T3 value is passed to charging charge system.

Described hydraulic pressure sensor module is changed circuit by pressure sensitive device and A/D and is formed, and converts pressure simulation amount to numerary signal, receives central air-conditioning billing management server by network, and P3, P4 value is passed to charging charge system.

Described temperature sensor assembly is changed circuit by temperature inductor and A/D and is formed, convert temperature simulation amount to numerary signal, it is connected to temperature controller by asynchronous communication, the built-in WIFI radio communication module of temperature controller, communicated to connect by WIFI router and central air-conditioning billing management server, T4 value is passed to charging charge system.

The blower fan work shelves position of described temperature controller output signal control blower fan coil pipe, and by gear value, communicated to connect by WIFI router and central air-conditioning billing management server, gear value is passed to charging charge system, and charging charge system searches standard condition hot exchange power q corresponding to this blower fan coil pipe according to gear value_bValue.

Namely charge system acquisition calculation formula calculates heat exchange amount Q value by integration after obtaining required data.

If need time-shared charge can, namely according to central air-conditioning different time sections operating load, it is possible to arrange different rate f.

Charge total value $F=f_1{Q}_1+f_2{Q}_2...={\mathrm{\Σ}}_{i=1}^n{f}_i{Q}_{i}dt.$

Compared with system of charging with present normally used charging, it is an advantage of the invention that: only increase computer (), WIFI router (one) water temperature sensor assembly (one), the equipment of hydraulic pressure sensor module (two), metering can be introduced in the central air conditioner system not having metering and make charge more rationally (temperature controller used in the present invention and temperature sensor assembly, for controlling the work of blower fan coil pipe, regulate room temperature, originally just it is equipped with), investment is few, substantially without the need to safeguarding. The present invention can be used alone in actual charging is applied, it is also possible to combinationally uses with charging on time, the on time charging of shift-up position, the selection of charging is had multiple, facilitates the multiple demand of various user.

The present invention can save the investment of measuring apparatus compared with direct refrigerant metering system, with by area and charged according to time compared with then there is rule of more reasonably charging. The present invention can with temperature controller being combined into one product, building apply in substantially do not need extra investment.

Accompanying drawing explanation

Fig. 1 is that the present invention applies installation and connection diagram.

Fig. 2 is that management server data of the present invention gathers metering and billing work block diagram.

Number in the figure illustrate: 1, unit cooler 2, transmission network 3, water-supply pipe 4, water temperature sensor assembly 5, first hydraulic pressure sensor module 6, blower fan coil pipe 7, electronic valve 8, temperature controller 9, air temperature sensor module 10, expansion tank 11, WIFI router 12, management server 13, the 2nd hydraulic pressure sensor module 14, return water pipe 15, water circulating pump.

Embodiment

Embodiment

As shown in Figure 1, this figure is with the formula piping arrangement mode two quantitative water system of control for closed cycle. The present invention is made up of transfer network 2, water temperature sensor assembly 4, first hydraulic pressure sensor module 5, temperature controller 8, temperature sensor assembly 9, WIFI router 11, management server 12, the 2nd hydraulic pressure sensor module 13 etc.

Described water temperature sensor assembly 4 is connected to management server 12 by transfer network 2.

Described first hydraulic pressure sensor module 5 is connected to management server 12 by transfer network 2.

Described 2nd hydraulic pressure sensor module 13 is connected to management server 12 by transfer network 2.

Described temperature controller 8 is communicated with management server 12 by WIFI router 11.

Described temperature controller 8 is electrically connected with electronic valve 7, controls the switch of electronic valve 7, switch signal is sent to management server 12.

Described temperature controller 8 is connected with temperature sensor assembly 9 asynchronous communication, and the temperature signal of reception is sent to management server 12.

Described temperature controller 8 is electrically connected with blower fan coil pipe 6, and control fan operation is in high, medium and low position and closedown, and the gear signal value of fan operation or closedown signal value are sent to management server 12.

Described WIFI router 11 is connected by five class twisted-pair communications with management server 12.

Described water temperature sensor assembly 4 is arranged on the outlet position of circulating water system water supply pipe 3.

Described first hydraulic pressure sensor module 5 is arranged on the outlet position of circulating water system water supply pipe 3.

Described 2nd hydraulic pressure sensor module 13 is arranged on the entry position of circulating water system return water pipe 14.

Described temperature sensor assembly 9 is arranged on time tuyere position of blower fan coil pipe 6.

Described unit cooler 1 is usually arranged on circulating water system and returns between water-supply pipe 3 and return water pipe 14.

Described expansion tank 10 is arranged on circulating water system return water pipe highest point position usually.

Fig. 2 is that management server data of the present invention gathers metering and billing work block diagram. Server can use win7 operating system, SQL2005 database.

Central air-conditioning metering charging of the present invention charge system concentrated collection supply water temperature and pressure of supply water are poor, gather real-time operational data and the room real time temperature of each room blower fan coil pipe respectively, calculate the heat exchange amount that each room uses, as the foundation of charging, system cost is low, and charging is reasonable.

Claims (5)

1. an indirect metering type central air-conditioning metering charging charge system, it is characterized in that: the water supply water temperature of system concentrated collection central air-conditioning, gather the room temperature in room and the real-time working condition of blower fan coil pipe respectively, calculate the heat exchange amount of blower fan coil pipe in conjunction with the standard condition parameter of blower fan coil pipe.

2. indirect metering type central air-conditioning metering charging according to claim 1 charge system, is characterized in that: water supply water temperature collection point is positioned at water outlet place of unit cooler.

3. indirect metering type central air-conditioning metering charging according to claim 1 charge system, is characterized in that: room temperature collection is completed by temperature controller, places temperature sensor at each blower fan coil pipe return air mouth and measures acquisition.

4. indirect metering type central air-conditioning metering charging according to claim 1 charge system, is characterized in that: the blower fan shelves position of blower fan coil pipe and the opening and closing of refrigerant valve pass to management server by temperature controller.

5. indirect metering type central air-conditioning metering charging according to claim 1 charge system, is characterized in that the calculation formula of heat exchange amount:

Dt,

Q is heat exchange amount, and q is blower fan coil pipe unit temperature difference hot exchange power, and t1 is the time opening, and t2 is the end time, the difference of real-time supply water temperature and inlet air temperature when �� T is the work of blower fan coil pipe.