CN101713677B - Method for measuring coolant flow in finished-automobile heater system - Google Patents
Method for measuring coolant flow in finished-automobile heater system Download PDFInfo
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- CN101713677B CN101713677B CN 200910195411 CN200910195411A CN101713677B CN 101713677 B CN101713677 B CN 101713677B CN 200910195411 CN200910195411 CN 200910195411 CN 200910195411 A CN200910195411 A CN 200910195411A CN 101713677 B CN101713677 B CN 101713677B
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Abstract
The invention relates to a method for measuring coolant flow in a finished-automobile heater system, which comprises the following steps: step 1: under certain conditions, determining coolant inlet temperatures T of the heater system at different automobile speeds R; step 2: installing the heater system to a performance rack of an air-conditioning system to carry out the test; step 3: allocating the coolant which is actually used in the heater system, and arranging a pressure test channel on the heater system; step 4: measuring pressure drop delta P at different flows V; step 5: determining the series of curves of the functional relationship between the flows V and the pressure drop delta P under various conditions; and step 6: measuring the pressure drop delta P of the heater system on the finished automobile under certain conditions, calling the corresponding functional relationship curve between the flow V and the pressure drop delta P, and carrying out the inverse computation to obtain the flow V. The method has the advantages of few errors of the final result and low cost, does not need to install a flowmeter, and can measure small flow values, thereby being very convenient.
Description
Technical field
The present invention relates to car load air-conditioning system field, relate in particular to the measuring method of heater system coolant rate in a kind of car load air-conditioning system.
Background technology
The car load air-conditioning system is made up of relatively independent refrigeration system and heating.Wherein heater system is mainly by well heater, and cooling air and engine coolant fluid are formed.At well heater, under the situation that cooling air quantity Q and EAT T determine, the heating capacity of heater system is feed liquor temperature t and the flow V that depends on engine coolant fluid.
Therefore heater system liquid side heating capacity need obtain determining by calculating behind the flow V in the car load air-conditioning system, though but flow V also the use traffic instrumentation get, have problems when on car load, using owing to flowmeter:
1) flowmeter is subjected to limit of range, can't accurately measure the flow under the low discharge.Especially under car load idling situation.
2) flowmeter of little range is relatively more expensive.
3) flowmeter needs polyphone to be installed in the system when the examining system flow.
4) in car load, probable discharge meter installing space is limited.
5) in the car load operational process, vibrate greatlyyer, have a strong impact on some type flow meter and accurately measure.
6) in the car load operational process, electromagnetic interference (EMI) is also bigger, also may influence flowmeter and accurately measure.
Measure in the car load operational process coolant fluid flow in the heater system so need a kind of new measuring method.
Summary of the invention
Technical matters to be solved by this invention provides a kind of measuring method of coolant flow in finished-automobile heater system, utilize the pressure of determining in the heater system to fall the funtcional relationship of Δ P and flow V, fall Δ P by the pressure of heater system in the measurement car load and come inverse flow V.
The present invention is achieved in that a kind of measuring method of coolant flow in finished-automobile heater system, may further comprise the steps:
Step 1, the cooling air quantity Q that determines certain condition and EAT T, the feed liquor temperature t of heater system when measuring the different speed of a motor vehicle R of car load is determined the relation between the speed of a motor vehicle R and feed liquor temperature t under this condition;
Step 2, heater system is pulled down from car load, independently be installed on the air-conditioning system performance stand;
The liquid coolant of step 3, the actual use of configuration heater system on air-conditioning system performance stand, and on well heater import and export pipe, arrange the pressure test passage;
Step 4, on air-conditioning system performance stand, set the experiment condition identical with car load, the HEATER FOR MEASURING system is under the condition of determining cooling air quantity Q, EAT T and feed liquor temperature t, Δ P falls in the pressure during different flow V;
Step 5, according to the data that step 4 measures, determine the flow V of this heater system under each condition and the function relation curve group that Δ P falls in pressure;
Step 6, on finished-automobile heater system the setting pressure test channel, determine the feed liquor temperature t according to current vehicle speed R, and behind definite cooling air quantity Q and the EAT T, by pressure drop Δ P, the function relation curve of Δ P falls in corresponding flow V and pressure in the invocation step five, calculates flow V.
Described flow V and pressure fall the function relation curve of Δ P and select function relation curve for use 2 times
ΔP＝aV
2+bV+c。
Measuring method of the present invention is by determining cooling air quantity Q, EAT T and the feed liquor temperature t under the certain condition, test the funtcional relationship that Δ P and flow V fall in the pressure that draws under this condition, then by measuring car load upper heater system pressure drop Δ P, according to current cooling air quantity Q, EAT T and feed liquor temperature t condition are called corresponding function and are come inverse flow V; The flow error that measuring method of the present invention obtains at last is little, need not to install flowmeter, and cost is low, can also measure low discharge numerical value, and is very convenient.
Description of drawings
The function relation figure of Δ P and flow V falls in the pressure that Fig. 1 determines for the measuring method of this coolant flow in finished-automobile heater system.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's statement, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
A kind of measuring method of coolant flow in finished-automobile heater system may further comprise the steps:
Step 1, the cooling air quantity Q that determines certain condition and EAT T, the feed liquor temperature t of heater system when measuring the different speed of a motor vehicle R of car load is determined the relation between the speed of a motor vehicle R and feed liquor temperature t under this condition; As shown in Table 1:
Table one
Cooling air quantity Q is relevant with voltage in the table one, and voltage available numerical value replaces, and the 13V equivalence is 500m
3/ h.
Step 2, heater system is pulled down from car load, independently be installed on the air-conditioning system performance stand;
The liquid coolant of step 3, the actual use of configuration heater system on air-conditioning system performance stand, and on well heater import and export pipe, arrange the pressure test passage;
Step 4, on air-conditioning system performance stand cooling air quantity Q, EAT T and the feed liquor temperature t of the certain condition of debugging, Δ P falls in the pressure when testing different flow V under this condition with the flowmeter on the performance stand;
Step 5, according to the data that step 4 measures, determine the flow V of this heater system under each condition and the function relation curve group that Δ P falls in pressure, as shown in Figure 1, select function relation curve usually for use 2 times, Δ P=aV
2+ bV+c;
The numerical value of a, b, c is definite by the function relation curve match of V and Δ P,
In the present embodiment
EAT T=20 degree, feed liquor temperature t=85 degree, air quantity Q=400m
3During/h:
a＝16.329；b＝42.106；c＝900.09
EAT T=20 degree, feed liquor temperature t=85 degree, air quantity Q=500m
3During/h:
a＝15.705；b＝51.815；c＝937.35
EAT T=20 degree, feed liquor temperature t=75 degree, air quantity Q=500m
3During/h:
a＝15.773；b＝59.817；c＝959.05
Step 6, on finished-automobile heater system the setting pressure test channel, determine the feed liquor temperature t according to current vehicle speed R, and behind definite cooling air quantity Q and the EAT T, by pressure drop Δ P, corresponding function relation curve in the invocation step five obtains flow V.
The current pressure that measures in the present embodiment as shown in Table 2 falls
Table two
When EAT T=20 spends, according to the pressure of heater system curve inverse flow falls
1. according to the feed liquor temperature t, cooling air quantity Q selects suitable pressure to fall curve
2. according to pressure curve falls, inverse flow V.
When 50km/h, curve falls in selection pressure
ΔP＝15.705V
2+51.815V+937.35
Δ P=2486.5Pa falls according to measuring pressure
Inverse outflow V=8.41l/m then
During with the flowmeter actual detected, during 50Km/h, actual flow is that the numerical error that goes out of 8.5l/m and inverse is very little.
Claims (2)
1. the measuring method of a coolant flow in finished-automobile heater system is characterized in that, may further comprise the steps:
Step 1, the cooling air quantity Q that determines certain condition and EAT T, the feed liquor temperature t of heater system when measuring the different speed of a motor vehicle R of car load is determined the relation between the speed of a motor vehicle R and feed liquor temperature t under this condition;
Step 2, heater system is pulled down from car load, independently be installed on the air-conditioning system performance stand;
The liquid coolant of step 3, the actual use of configuration heater system on air-conditioning system performance stand, and on well heater import and export pipe, arrange the pressure test passage;
Step 4, on air-conditioning system performance stand, set the experiment condition identical with car load, the HEATER FOR MEASURING system under the condition of determining cooling air quantity Q, EAT T and feed liquor temperature t, the Ya Li Jiang ⊿ P during different flow V;
Step 5, according to the data that step 4 measures, determine the function relation curve group of the flow V and the Ya Li Jiang ⊿ P of this heater system under each condition;
Step 6, on finished-automobile heater system the setting pressure test channel, determine the feed liquor temperature t according to current vehicle speed R, and behind definite cooling air quantity Q and the EAT T, by gaging pressure Jiang ⊿ P, the function relation curve of corresponding flow V and Ya Li Jiang ⊿ P calculates flow V in the invocation step five.
2. the measuring method of coolant flow in finished-automobile heater system as claimed in claim 1, it is characterized in that: the function relation curve of described flow V and Ya Li Jiang ⊿ P is selected function relation curve for use 2 times
⊿P＝aV
2+bV+c。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910195411 CN101713677B (en) | 2009-09-09 | 2009-09-09 | Method for measuring coolant flow in finished-automobile heater system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910195411 CN101713677B (en) | 2009-09-09 | 2009-09-09 | Method for measuring coolant flow in finished-automobile heater system |
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| CN101713677A CN101713677A (en) | 2010-05-26 |
| CN101713677B true CN101713677B (en) | 2011-11-16 |
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| CN 200910195411 Active CN101713677B (en) | 2009-09-09 | 2009-09-09 | Method for measuring coolant flow in finished-automobile heater system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123270A (en) * | 2012-12-21 | 2013-05-29 | 中国飞行试验研究院 | Measuring method of onboard liquid flow |
Citations (3)
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|---|---|---|---|---|
| CN1520502A (en) * | 2001-05-03 | 2004-08-11 | ����˹���ֵ¸��� | Method and arrangement for cntrolling temp of outstream flow from heat exchanger and measuring produced heat |
| CN1869602A (en) * | 2005-05-27 | 2006-11-29 | Avl里斯脱有限公司 | Method and device for continuous measurement of dynamic fluid consumption of energy consumption device |
| CN101368833A (en) * | 2008-09-25 | 2009-02-18 | 武汉理工大学 | Testing bench used for detecting air leakage of automobile air conditioner ventiduct |
-
2009
- 2009-09-09 CN CN 200910195411 patent/CN101713677B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1520502A (en) * | 2001-05-03 | 2004-08-11 | ����˹���ֵ¸��� | Method and arrangement for cntrolling temp of outstream flow from heat exchanger and measuring produced heat |
| CN1869602A (en) * | 2005-05-27 | 2006-11-29 | Avl里斯脱有限公司 | Method and device for continuous measurement of dynamic fluid consumption of energy consumption device |
| CN101368833A (en) * | 2008-09-25 | 2009-02-18 | 武汉理工大学 | Testing bench used for detecting air leakage of automobile air conditioner ventiduct |
Non-Patent Citations (1)
| Title |
|---|
| 张彦丽等.汽车空调"制冷速度不够快"原因分析.《制冷技术》.2009,(第1期),40-43. |
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Address after: 201204 Pudong New Area South Road, Shanghai, No. 1768 Patentee after: Shanghai Aisidake Automotive Air Conditioning Systems Co. Address before: 201204 Pudong South Road, Shanghai, No. 1768 Patentee before: Shanghai Delphi Auto A/C Systems Co., Ltd. |
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