CN100443872C - Household metering system and method for central air conditioner - Google Patents
Household metering system and method for central air conditioner Download PDFInfo
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- CN100443872C CN100443872C CNB2005100059241A CN200510005924A CN100443872C CN 100443872 C CN100443872 C CN 100443872C CN B2005100059241 A CNB2005100059241 A CN B2005100059241A CN 200510005924 A CN200510005924 A CN 200510005924A CN 100443872 C CN100443872 C CN 100443872C
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Abstract
The present invention provides a household metering system of a central air conditioner and a corresponding metering method. The metering system comprises a central air conditioner, a temperature flowing sensor which is arranged on an outlet of the central air conditioner, at least one air conditioner user unit which is connected with the central air conditioner through a main supply pipe and a main backflow pipe, and at least one controller which is communicated with the system or every air conditioner user unit, wherein every air conditioner user unit is provided with at least one indoor machine which is respectively connected to a sub-supply pipe and a sub-backflow pipe of the main supply pipe and the main backflow pipe, a flow meter which is arranged on an inlet or outlet of every air conditioner user unit, a return flow temperature sensor which is arranged on the outlet of every air conditioner user unit. With the heat metering system and the method of the present invention, so long as a small amount of parameters is measured and the flow meter and the temperature sensor even do not need to be arranged, the heat can be measured. Compared with the normal heat meter, the present invention has the advantages of simplicity and low cost.
Description
Technical field
The present invention relates generally to central air conditioner, particularly relates to the household metering system and the method for central air conditioner.
Background technology
Most of family expenses and middle-size and small-size business air conditioner system all are independently.For example, in dwelling house, each room or each family are an autonomous system.Equally, each company or every office also are an autonomous system in commercial building.Want shared central air conditioner of many families family or how tame small-sized company and hot-water heating system, a very big obstacle arranged, be exactly how accurately to measure the usefulness of each family or each company cold/use heat, so that rationally remember expense.
Various multi-form calorimeters are arranged in the market, but they all are independently each user to be measured, and need to measure two temperature and flow.Specifically, wherein related basic (theory) computing formula of heat energy is:
Q=∫ m ' C
pΔ T dt=C
p∫ m ' Δ T dt (formula 1)
Wherein Q is institute's heat dissipation energy, and m ' is the flow of cold-producing medium (for example water), C
pBe specific heat at constant pressure, Δ T is the temperature difference, and t is the metering time period.Can calculate in a period of time by this formula, each isolated user with heat/use cold.From above formula as can be seen, suppose C
pDo not change in time, then need to measure following two variablees:
Refrigerant flow m '
Temperature difference T=T
2(reflux temperature)-T
1(inflow temperature) (formula 2)
Therefore, in existing central air conditioner household metering technology, need to gather three parameters, promptly each divides refrigerant flow m ', the inflow temperature T at family
1With reflux temperature T
2So just make metering process seem comparatively complicated, and need a fairly large number of pick-up unit of configuration, be unfavorable for controlling cost.
Summary of the invention
For overcoming above-mentioned defective, the objective of the invention is to, the household metering system and the corresponding metering method of a kind of simple structure, lower-cost central air conditioner is provided.
For achieving the above object, the invention provides a kind of central air conditioner household metering system, comprising: a central air conditioning; One is arranged on the outflow temperature sensor in this central air conditioning exit; Be connected at least one air conditioner user unit of central air conditioning by aggregate supply pipe and total recirculatory pipe, each air conditioner user unit all has at least one indoor set, is connected to sub-supply pipe and the flowmeter in sub-recirculatory pipe, the inflow point that is arranged on each air conditioner user unit or exit and the reflux temperature sensor that is arranged on the exit of each air conditioner user unit of aggregate supply pipe and total recirculatory pipe respectively; And be in relation to system or be in relation at least one controller of each air conditioner user unit.
The present invention also provides a kind of divided gauging method of central air conditioner system, central air conditioner system comprises a central air conditioning, at least one coupled air conditioner user unit, and at least one controller, method may further comprise the steps: the refrigerant flow that A) obtains each air conditioner user unit, this step can realize by one of following dual mode: i) in the inflow point or the exit of air conditioner user unit one flowmeter is set, record the flow of the cold-producing medium of each air conditioner user unit of turnover by this flowmeter, and ii) in controller, calculate the cold-producing medium flow velocity, and then obtain refrigerant flow again according to Bernoulli equation; B) obtain the cold-producing medium inflow of each air conditioner user unit and the temperature difference that refluxes, this step can realize by one of following dual mode: a reflux temperature sensor i) is set in the exit of air conditioner user unit, record the temperature of the cold-producing medium that refluxes from each air conditioner user unit by this reflux temperature sensor, be provided with one in the exit of central air conditioning and flow out temperature sensor, record from the temperature of the cold-producing medium of central air conditioning outflow by this outflow temperature sensor, the difference of these two temperature is the temperature difference, and the rotation speed of the fan of ii) gathering the indoor set of each air conditioner user unit, and then calculate and the proportional temperature difference of rotation speed of the fan by controller by controller; And C) in controller, utilize the flow and the temperature difference data that obtain by above step, calculate the heat consumption of each air conditioner user unit, charge by accumulative total and storage again.
By heat measuring system of the present invention and method, just can carry out the heat metering as long as measure a spot of parameter (even flowmeter and temperature sensor can be set), therefore simple than general calorimeter, and with low cost.
Description of drawings
Fig. 1 is the synoptic diagram of the central air conditioner piping system of the preferred embodiment according to the present invention; And
Fig. 2 is the synoptic diagram of central air conditioner metering/control circuit system.
Embodiment
At first, the invention provides a kind of method and relevant metering system that measures by the direct measurement parameter relevant with temperature difference T with flow m '.
As shown in Figure 1, the central air conditioner household metering system according to a preferred embodiment of the present invention comprises: central air conditioning 1; Be arranged on the outflow temperature sensor 6 in this central air conditioning exit; And being connected at least one air conditioner user unit (schematically having drawn among the figure three) of central air conditioning by aggregate supply pipe 10 and total recirculatory pipe 11, each air conditioner user unit all has at least one indoor set 2 (also schematically having drawn three among the figure), is connected to sub-supply pipe 7 and the flowmeter 9 in sub-recirculatory pipe 8, the inflow point that is arranged on each air conditioner user unit or exit and the reflux temperature sensor 5 that is arranged on the exit of each air conditioner user unit of aggregate supply pipe 10 and total recirculatory pipe 11 respectively.
In the present invention, can dispose the operation that a master controller 4 is controlled whole central air conditioner system, also can dispose the operation that a sub-controller 3 is controlled each air conditioner user unit respectively for each air conditioner user unit.Preferably dispose master controller 4 and sub-controller 3 as shown in Figure 2 simultaneously.
The operational process of whole central air conditioner system is: refrigerant fluid flows out from central air conditioning 1, through flowing out temperature sensor 6 to each air conditioner user unit, passes through reflux temperature sensor 5 again, gets back to central air conditioning 1 at last.
Unlike the prior art be that the system of the present invention not inflow point in each air conditioner user unit is provided with temperature sensor respectively, but only is provided with an outflow temperature sensor 6 in the central air conditioning exit.That is to say, need not to measure the inflow temperature T of each air conditioner user unit
1, the outflow temperature that only need measure central air conditioning 1 gets final product.So just greatly reduce cost, and metering process is simplified more.
Specifically, water is at the available current existing technical measurement of flow (m ' in the formula 1 just) of specific period.And the inflow temperature T in the formula 2
1The outflow temperature that is equivalent to central air conditioning 1 can be by flowing out temperature sensor 6 disposable reading, therefore can be with T
1Be used as given data, need not repeatedly replication.So, when will to each air conditioner user unit with heat/when measuring, only need to measure the temperature T of each air conditioner user unit with cold
2With flow m ', these data are sent to controller 3 or controller 4 through power lead (power line carrier technology) or cable, calculate, add up and storage according to top formula 1 and formula 2 by controller 3 or 4, so that note is taken.
The present invention also provides a kind of method of indirect metering, and in the method, flow m ' and temperature difference T are calculated, rather than directly measures.
1) calculating of flow m '
According to Bernoulli equation:
Wherein P is a pressure, and ρ is a fluid density, and V is a flow velocity, and g is an acceleration of gravity, and h is the setting height(from bottom) of indoor set.
Give fixed system for one, therefore pressure P, all known through the pressure drop Δ p and the indoor set setting height(from bottom) h of indoor set as long as the valve of each household indoor set is all opened, just can calculate fluid velocity v according to Bernoulli equation (formula 3).Because fluid flow m ' and flow velocity v are proportional, thereby flow velocity v be multiply by proportionality constant (this proportionality constant can be demarcated by the test of carrying out) can obtain fluid flow m ' under different condition.
2) calculating of temperature difference T
In addition, the applicant recognizes that also proportional by the temperature difference Δ T and the air velocity of every indoor set 2, air velocity is then proportional with rotation speed of the fan.Therefore, as long as can calculating, the acquisition rotation speed of the fan obtains temperature difference T.Rotation speed of the fan can be at an easy rate by the controller record.The proportionality constant that multiply by demarcation again can obtain temperature difference Δ T.
Therefore, when will by this indirect method to each air conditioner user unit with heat/when measuring with cold, only need utilize the given datas such as setting height(from bottom) of pressure, fluid density, indoor set in controller 3 or controller 4, to calculate flow velocity V and then be flow m ', and go out temperature difference Δ T according to data computation such as rotation speeds of the fan according to formula 3.At last, by formula 1 can calculate each isolated user with heat/use cold.As continuing accumulative total and storage, can finish to remember the work of taking a lot of work.
Though more than provided these two kinds of methods of direct determination method and indirect determination method, those of ordinary skill in the art can consider fully these two kinds of methods are combined and measure.For example, can consider that the computing method that the indirect method indirect obtained flow m ' are used for direct method, thereby can omit flowmeter 9; The computing method that the indirect method indirect can be obtained temperature difference T are used for direct method, thereby can omit temperature sensor 5 and 6; The flow that directly records with flowmeter 9 in the direct method can be used for indirect method; Also the temperature difference that records with temperature sensor 5 and 6 in the direct method can be used for indirect method.Above-described direct determination method and the method that the indirect determination method is mixed mutually have simple structure, advantage with low cost equally.
Should be appreciated that; though more than disclosed better embodiment of the present invention; but be familiar with those of ordinary skill in the art and can on the basis of above disclosure, make various conversion that are equal to and change; therefore; protection scope of the present invention is not limited to the content of above announcement, but should be limited by appended claims.
Claims (2)
1. central air conditioner household metering system comprises:
One central air conditioning (1);
One is arranged on the outflow temperature sensor (6) in this central air conditioning exit;
Be connected at least one air conditioner user unit of central air conditioning by aggregate supply pipe (10) and total recirculatory pipe (11), each air conditioner user unit all has at least one indoor set (2), is connected to the described aggregate supply pipe and the sub-supply pipe (7) and the sub-recirculatory pipe (8) of total recirculatory pipe, the reflux temperature sensor (5) that is arranged on the inflow point of each air conditioner user unit or the flowmeter in exit (9) and is arranged on the exit of each air conditioner user unit respectively; And
Be in relation to described system or be in relation at least one controller (3,4) of described each air conditioner user unit.
2. the divided gauging method of a central air conditioner system, described central air conditioner system comprise a central air conditioning (1), coupled at least one air conditioner user unit and at least one controller (3,4), said method comprising the steps of:
A) obtain the refrigerant flow (m ') of described each air conditioner user unit, this step can realize by one of following dual mode: i) in the inflow point or the exit of described air conditioner user unit one flowmeter (9) is set, record the flow (m ') of the cold-producing medium of each air conditioner user unit of turnover by this flowmeter, and ii) in described controller, calculate the cold-producing medium flow velocity, and then obtain refrigerant flow (m ') again according to Bernoulli equation;
B) obtain the cold-producing medium inflow of described each air conditioner user unit and the temperature difference (Δ T) that refluxes, this step can realize by one of following dual mode: a reflux temperature sensor (5) i) is set in the exit of described air conditioner user unit, records the temperature (T of the cold-producing medium that refluxes from each air conditioner user unit by this reflux temperature sensor
2), be provided with one in the exit of described central air conditioning and flow out temperature sensor (6), record from the temperature (T of the cold-producing medium of central air conditioning outflow by this outflow temperature sensor
1), the difference of these two temperature is the described temperature difference (Δ T), and ii) pass through the rotation speed of the fan that described controller is gathered the indoor set (2) of described each air conditioner user unit, and then calculate and the proportional described temperature difference of described rotation speed of the fan (Δ T) by described controller; And
C) in described controller (3,4), utilize the described flow (m ') and the described temperature difference (Δ T) data that obtain by above step, calculate the heat consumption of each air conditioner user unit, charge by accumulative total and storage again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100059241A CN100443872C (en) | 2005-01-19 | 2005-01-19 | Household metering system and method for central air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100059241A CN100443872C (en) | 2005-01-19 | 2005-01-19 | Household metering system and method for central air conditioner |
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|---|---|
| CN1808083A CN1808083A (en) | 2006-07-26 |
| CN100443872C true CN100443872C (en) | 2008-12-17 |
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|---|---|---|---|
| CNB2005100059241A Expired - Fee Related CN100443872C (en) | 2005-01-19 | 2005-01-19 | Household metering system and method for central air conditioner |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101051413B (en) * | 2007-03-30 | 2011-12-21 | 王学 | Monitoring and metering system and its method for central air conditioner cool and heat volume and electricity |
| CN102037287A (en) * | 2008-05-06 | 2011-04-27 | 陈志承 | Method for calculating a central air-conditioning use proportion of each user |
| CN101476764B (en) * | 2009-01-20 | 2010-06-02 | 广州大学 | Household metering system for cooling capacity of central air conditioner |
| CN101937011B (en) * | 2009-07-01 | 2012-07-25 | 约克广州空调冷冻设备有限公司 | Individual household measuring system and individual household measuring method of central air conditioner |
| CN106091297A (en) * | 2016-08-06 | 2016-11-09 | 湖南东尤水汽能节能有限公司 | A kind of wind energy household metering system |
| CN106287992A (en) * | 2016-10-18 | 2017-01-04 | 深圳沃海森科技有限公司 | Can detect that the intelligent building air conditioning system of tolerance |
| CN112413830B (en) * | 2020-11-02 | 2022-06-14 | 青岛海尔空调器有限总公司 | Information processing method and information processing equipment for shared air conditioning system |
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|---|---|---|---|---|
| CN1344921A (en) * | 2001-10-20 | 2002-04-17 | 卢忠 | Separated metering method and system for central air conditioner |
| JP2002357485A (en) * | 2001-05-31 | 2002-12-13 | Sanki Eng Co Ltd | Thermal energy measurement device and air conditioning equipment using it |
| CN1487030A (en) * | 2002-09-30 | 2004-04-07 | 江门市江磁电工企业有限公司 | Transparent aqueous conduction paint for electroluminescent wire and its production process |
| CN2620832Y (en) * | 2003-04-01 | 2004-06-16 | 郑州春泉暖通节能设备有限公司 | Charge meter for central air conditioner |
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2005
- 2005-01-19 CN CNB2005100059241A patent/CN100443872C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002357485A (en) * | 2001-05-31 | 2002-12-13 | Sanki Eng Co Ltd | Thermal energy measurement device and air conditioning equipment using it |
| CN1344921A (en) * | 2001-10-20 | 2002-04-17 | 卢忠 | Separated metering method and system for central air conditioner |
| CN1487030A (en) * | 2002-09-30 | 2004-04-07 | 江门市江磁电工企业有限公司 | Transparent aqueous conduction paint for electroluminescent wire and its production process |
| CN2620832Y (en) * | 2003-04-01 | 2004-06-16 | 郑州春泉暖通节能设备有限公司 | Charge meter for central air conditioner |
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