CN102893096A - System and method for charging hvac system - Google Patents

System and method for charging hvac system Download PDF

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Publication number
CN102893096A
CN102893096A CN2011800137564A CN201180013756A CN102893096A CN 102893096 A CN102893096 A CN 102893096A CN 2011800137564 A CN2011800137564 A CN 2011800137564A CN 201180013756 A CN201180013756 A CN 201180013756A CN 102893096 A CN102893096 A CN 102893096A
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CN
China
Prior art keywords
hvac
liquid line
temperature
outdoor environment
test
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CN2011800137564A
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Chinese (zh)
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CN102893096B (en
Inventor
D·E·登顿
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特灵国际有限公司
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Priority to US12/723,660 priority Critical
Priority to US12/723,660 priority patent/US20110219790A1/en
Application filed by 特灵国际有限公司 filed Critical 特灵国际有限公司
Priority to PCT/US2011/028355 priority patent/WO2011115913A2/en
Publication of CN102893096A publication Critical patent/CN102893096A/en
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Publication of CN102893096B publication Critical patent/CN102893096B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B45/00Arrangements for charging or discharging refrigerant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2345/00Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/001Charging refrigerant to a cycle

Abstract

A method of charging an HVAC system by determining a relationship between a liquid line temperature of the HVAC system, a suction line pressure of the HVAC system, and an ambient outdoor temperature of the HVAC system. A method of charging an HVAC system by adjusting a mass of refrigerant in the HVAC system to approach a target minimum liquid line temperature. A method of charging an HVAC system by testing the HVAC system according to at least three sets of test parameters, two of the three sets of test parameters comprising testing the HVAC system at substantially a same outdoor ambient temperature and at least one of the remaining set of test parameters comprising testing the HVAC system at a different outdoor ambient temperature.

Description

Be used for filling HVAC system of systems and method

Background technology

Heating, ventilation and air handling system (HVAC system) are used cold-producing medium to cool off in thermodynamic process and/or are added hot fluid, are used for temperature and/or the humidity in the space of adjusting HVAC system service.Some HVAC systems comprise the in fact refrigeration system of sealing, and when comprising the cold-producing medium of specified quantitative in the refrigeration system that this seals in fact, its performance is better.The cold-producing medium of this specified quantitative that the performance of specific HVAC system is good required or " charging amount " of so-called cold-producing medium depend on capacity and/or the structure of the various assemblies of HVAC system of accepting cold-producing medium, comprise any refrigerant lines for the various assemblies that connect the HVAC system.As everyone knows, in the process of installation, maintenance and/or maintenance HVAC system, some HVAC systems need to regulate amount and/or the charging amount of the cold-producing medium retained in the HVAC system.

A lot of well-known methods to HVAC system the supply system cryogen (or method of " filling " HVAC system) are arranged, although these methods by strict implement, the method for having now still can't accurately fill the HVAC system.The method of some well-known filled HVAC systems comprise mainly based on cold-producing medium weight to the HVAC system fill, in response to the cold regulation HVAC system of the crossing charging amount of measuring, and in response to the mistake heat regulation HVAC system charging amount of measuring.Because the environment that the HVAC system moves (namely, temperature, humidity and/or other environmental factor), since the physical arrangement of HVAC system when actual installation compared to the physical arrangement of these methods supposition (, the inter-module of regulation apart from and/or the component height of regulation poor) variation and/or since in the HVAC running compared to the operation of these methods supposition (namely, the regulation of passing particular heat exchanger throughput is provided) variation, the above listed method that the HVAC system is filled possibly can't fill the HVAC system rightly.

Summary of the invention

The method that provides in certain embodiments the relation between the outdoor environment temperature of a kind of suction line pressure of liquid line temperature, the HVAC system by measuring the HVAC system and HVAC system that the HVAC system is filled.

Provide in further embodiments a kind of by regulating the method for refrigerant amount to fill near the minimum liquid line temperature of target and to the HVAC system in the HVAC system.

In also having some embodiment, provide a kind of method that the HVAC system is filled, the method comprises according at least three group test parameters tests the HVAC system, two groups in three groups of test parameters are included in test HVAC system under the roughly the same outdoor environment temperature, and at least one groups in all the other group test parameters are included in test HVAC system under the different outdoor environment temperatures.

Description of drawings

In order more completely to understand the present invention and its advantage, existing by reference to the accompanying drawings with describe in detail with reference to following concise and to the point description, wherein identical Reference numeral represents identical parts.

Fig. 1 is the schematic diagram of HVAC system according to an embodiment of the invention;

Fig. 2 is for marking and drawing the simplified diagram that the number of test points certificate is arranged;

Fig. 3 is the figure that the filled curve of difference of tested HVAC system is shown;

Fig. 4 is for filling chart, and it illustrates according to the minimum liquid line temperature of all types of target of outdoor environment temperature and suction line pressure;

Fig. 5 is the simplified flow chart that the method that fills the HVAC system is shown; And

Fig. 6 A-6D is the filled chart for the various piece that further specifies the described method of Fig. 5.

The specific embodiment

Even the method for some filled HVAC systems also can't fill the HVAC system rightly when these methods of strict implement.In addition, some HVAC systems continue to move barely satisfactoryly, even these HVAC systems do not have rightly charging refrigerant.For example, some comprise that sour jujube fin formula heat exchanger and/or other have the HVAC system of heat exchanger of roughly traditional total refrigerant charge filling the state (being higher than best refrigerant amount) that excessively fills that causes or fill and still can continue operation under the not enough state (being lower than best refrigerant amount) according to crossing cold filled method, although not too effective.

Yet some HVAC systems that comprise micro channel heat exchanger are unlikely when appropriate filling not to be moved barely satisfactoryly, even charging amount only a little more than or a little less than suitable refrigerant amount.Therefore, need a kind of filled HVAC system of systems and method that fills the HVAC system accuracy that improve.In addition, for the HVAC system that comprises micro channel heat exchanger, same needs can be more eager.The invention provides appropriate HVAC system of systems and the method for filling, it reaches the minimum liquid line temperature of target by the charging amount of regulating the HVAC system, and determines reach which kind of target minimum liquid line temperature with suction line pressure and outdoor environment temperature as feedback by main.

Fig. 1 illustrates HVAC system 100, and it is configured to allow according to filled method disclosed here HVAC system 100 to be filled.HVAC system 100 generally includes indoor unit (or evaporator unit) 102 and outdoor unit (or condensing unit) 104.Indoor unit 102 comprises indoor heat converter (or evaporator coil) 106, blower fan 108 and cold-producing medium current limiter 110.Outdoor unit 104 comprises coolant compressor 112, outdoor heat converter (or condenser coil) 114, blower fan 116, low tension switch 118 and high-voltage switch gear 120.The most normally, the output of indoor heat converter 106 is connected to the input of compressor 112 by suction line 122.In the present embodiment, suction service valve 124 is configured to optionally allow cold-producing medium to pass through 126 inflows of suction line pressure tap and flows out suction line 122.

In addition, be configured to optionally allow for filled mouthful 128 cold-producing medium to pass through to fill mouthful 128 inflows and outflow suction line 122.Fill mouth 128 and can be equipped with check-valves, for example like Rider valve (Schrader valve), overcharge geat 128 optionally to allow flow.The cold-producing medium output of compressor 112 is connected to the input of outdoor heat converter 114 by discharge pipe 130.The output of heat exchanger 114 is connected to the input of current limiter 110 by liquid line 132.In the present embodiment, liquid line service valve 134 is configured to optionally allow cold-producing medium to pass through liquid line pressure tap 136 inflow and trickle pipelines 132.The output of current limiter 110 is connected to the input of indoor heat converter 106.

In certain embodiments, HVAC system 100 also comprises: suction line pressure gauge 138, and it is configured to the refrigerant pressure in definite and/or the demonstration suction line 122; Liquid manometer 140, it is configured to the refrigerant pressure in definite and/or the demonstration liquid line 132; Liquid line thermometer 142, it is configured to determine and/or show the temperature of liquid line 132; And environment temperature sensor 144, it is configured to measure and/or shows instant environment temperature around the outdoor unit 104.In certain embodiments, the position of environment temperature sensor 144 is selected in the mode that improvement is subjected to outdoor unit 104 to move the measurement of the ambient temperature that is affected.In certain embodiments, the distance of the maximum isolation between environment temperature sensor 144 and the outdoor unit 104 (that is, outdoor heat converter 114) is about 6 inches or less.HVAC system 100 also comprises indoor temperature transmitter 148, and it is configured to indoor environment temperature definite and/or that demonstration is associated with indoor unit 102.

In certain embodiments, HVAC system 100 is installed to be: the cold-producing medium of input indoor unit 102 (namely, liquid line 132 is typically connected to the part of indoor unit 102) can be positioned vertically to be offset from from the cold-producing medium (that is, liquid line 132 is typically connected to the part of outdoor unit 104) of outdoor unit 104 outputs.This vertical shift between the output of the input of this liquid line 132 and liquid line 132 is commonly referred to range of lift 146.This range of lift 146 is considered to depend on the specific installation environment of HVAC system 100 usually.For example, when outdoor unit 104 roughly was seated ground level, when indoor unit 102 also roughly was installed in ground level, this range of lift 146 can be ignored.Yet, in the installation of HVAC system 100, when outdoor unit 104 roughly was seated ground level and indoor unit 102 and just is installed in ground level top (that is, two layers of building or more high-rise and/or place the attic of building), range of lift 146 will be very large.In certain embodiments, range of lift 146 can have about 0 to about 50 feet value, also can be about 0 to about 30 feet, or other numerical value.Range of lift 146 shown in Figure 1 is illustrated as by indoor unit 102 and is positioned to vertically be higher than due to the outdoor unit 104, and in certain embodiments, range of lift 146 also can be positioned to vertically be higher than due to the indoor unit 102 by outdoor unit 104.

In addition, in certain embodiments, usually have necessary length in order to indoor unit 102 being connected in the situation of outdoor unit 104 at every suction line 122 and liquid line 132, the length of every suction line 122 and liquid line 132 is usually roughly the same.Every suction line 122 and liquid line 132 must extend to the value that realizes above-mentioned so-called overall " length of pipeline " that indoor unit 102 is connected to outdoor unit 104 for less than 10 feet to about 200 feet, also can be less than 10 feet to about 60 feet, or indoor unit 102 is connected to outdoor unit 104 necessary other suitable lengths.

In the embodiment of some HVAC systems 100, at least one in indoor heat converter 106 and the outdoor heat converter 114 is so-called " microchannel " heat exchanger.Micro channel heat exchanger can be that U.S. Patent Publication No. is disclosed type among the 2005/0269069A1, and it belongs to Shi Difen S Chinese cock (Stephen S.Hancock), be published on December 8th, 2005, and integral body is quoted as a reference.Will be appreciated that, the embodiment that does not comprise micro channel heat exchanger with HVAC system 100 compares, in indoor heat converter 106 and outdoor heat converter 114 at least one is among the embodiment of HVAC system 100 of micro channel heat exchanger, and filling suitable refrigerant amounts to HVAC system 100 is very crucial for the expected performance of realizing HVAC system 100.Compare with for example heat exchanger of other type of so-called " sour jujube fin coil pipe " heat exchanger, the operation susceptibility of the HVAC system 100 of above-mentioned increase is at least part of, and less internal capacity holds cold-producing medium because micro channel heat exchanger has significantly.As explaining in more detail that hereinafter HVAC system 100 can fill according to one or more filled methods described here.

The most general, the filled method of HVAC system provided by the invention allows the HVAC system, include but not limited to the HVAC system such as HVAC system 100, to reach the minimum liquid line temperature of target as purpose, mainly by the refrigerant charge that changes the HVAC system HVAC system is filled, wherein the minimum liquid line temperature of target is determined according to outdoor environment temperature and suction line pressure.The most general, the various patterns of indoor unit 102 and outdoor unit 104 and/or variation be combined in the minimum liquid line temperature of target that the minimum liquid line temperature of target of a HVAC system that difference on operational and/or the equipment can cause having the first combination of indoor unit 102 and outdoor unit 104 is different from the different HVAC system of the second combination with indoor unit 102 and outdoor unit 104.Therefore, should be appreciated that the method that the HVAC system is filled more disclosed herein at first needs to determine the minimum liquid line temperature of one group of target of recommending for specific HVAC system 100.In other words, although should be appreciated that different HVAC systems 100 can fill according to said method, different HVAC system 100 can fill according to the minimum liquid line temperature value of different targets, even at service condition, outdoor environment temperature and/or the suction line pressure of different HVAC systems all in the roughly the same situation.Thereby the method for some filled HVAC systems 100 can comprise according to the outdoor environment temperature of HVAC system 100 and suction line pressure determines the minimum liquid line temperature values of a plurality of targets.

The most general, for any specific HVAC system, the minimum liquid line temperature values of a plurality of targets can be determined according to outdoor environment temperature and the suction line pressure of specific HVAC system.Such relation can be by successfully and can utilize with predicting, this is because suction line pressure and outdoor environment temperature (that is, suction line pressure gauge 138 and environment temperature sensor 144 are measured respectively) are found to be with the operation of HVAC system and/or affect in fact independently function of environmental factor that the HVAC system moves.In other words, suction line pressure and outdoor environment temperature, although be not to be function fully independently in certain embodiments, any interdependency between suction line pressure and outdoor environment temperature all is inappreciable actually and/or statistically.In particular, have been found that not foresight and/or the statistical marked change of inevitable corresponding outdoor environment temperature of change of suction line pressure, similarly, the also not foreseeable and/or statistical marked change of inevitable corresponding suction line pressure of the change of outdoor environment temperature.Above-mentioned discovery is in conjunction with further finding, be the liquid line temperature (namely, measured by liquid line thermometer 142) be roughly foreseeable based on suction line pressure and outdoor environment temperature, the generation and the useful enforcement that allow for the minimum liquid line temperature values of a plurality of target above-mentioned provide condition.

In one embodiment, the minimum liquid line temperature value of target can be determined by test HVAC system under at least three set conditions.Should be appreciated that HVAC system testing described here can be to utilize to test, implement simultaneously to finish by simulation and/or both.The most general, the first test of HVAC system can be implemented according to first group of operational factor, is included under the first selected outdoor environment temperature and implements the first test.As the result according to first group of operational factor test HVAC system, the first test is intended to the functional relation between definite outdoor environment temperature, suction line pressure and the liquid line temperature.Then, according to second group of same HVAC system of operational factor test, be included under the first selected outdoor environment temperature and implement the second test, wherein second group of operational factor is chosen is used for bringing different consequent suction line force value, although used identical outdoor environment temperature in the first test and second is tested.Should be appreciated that, between the first test and the second test, can change any too much service condition and produce above-mentioned different suction line pressure result, include but not limited to, change the air-flow by indoor heat converter 106, change the air-flow by outdoor heat converter 114, change the refrigerant flow rate by compressor 112, change the environmental condition relevant with indoor unit 102 indoor environment temperature of indoor temperature transmitter 148 measurements (for example by), change range of lift 146, change the length of suction line 122, change the length of liquid line 132 and/or many other variablees that any known suction line pressure to the HVAC system is exerted one's influence.No matter change in many variablees which between the first test and the second test, the first and second tests are shared and are made the first test and second test the operation variable that moves under the first identical outdoor environment temperature.At last, the 3rd test is according to the 3rd group of operational factor operation, and wherein the outdoor environment temperature of the 3rd test is not equal to the outdoor environment temperature value of using in the first test and the second test.

Each test in the first test, the second test and the 3rd test all is configured to gather at least the data with suction line pressure, outdoor environment temperature and liquid line temperature correlation, and wherein the suction line pressure-responsive changes in the variation of one or more operational factors.Equally, the each test in the first test, the second test and the 3rd test can be summarised as the data point of using in the cartesian coordinate chart 200 is provided at least, and as shown in Figure 2, suction line pressure is on X-axis, and the liquid line temperature is on Y-axis.Chart 200 is selected and be applied to the first test point 202 from the test data of the first test.Chart 200 is selected and be applied to the second test point 204 from the test data of the second test.Because each personal identical outdoor environment temperature of the first test and the second test is finished, the linear relation between the first outdoor environment temperature and liquid line temperature and the suction line pressure is rendered as the first outdoor environment temperature line 206 that roughly passes each test point in the first test point 202 and the second test point 204 at chart 200.Have to the first test point 202 roughly similar suction line pressure the 3rd test point 208 from the 3rd the test test data select and be applied to chart 200.Because the 3rd test uses the outdoor environment temperature different with the second test from the first test to implement, and because the intrinsic relation between suction line pressure, liquid line temperature and the outdoor environment temperature is consistent substantially function, the second outdoor environment temperature line 210 is rendered as the straight line that not only passes the 3rd test point 208 but also be roughly parallel to the first outdoor environment temperature line 206 at chart 200.

Above-mentioned discussion relates to determines that specific function and/or equation express at large the liquid line temperature and change with outdoor environment temperature and suction line pressure, and the estimation that is provided as result's liquid line temperature fills the HVAC system guidance is provided to be well-suited for.Should be appreciated that, from the data of collecting according to the first test, the second test and the 3rd test, can determine other equation, function and/or relation.In other embodiments, may be higher or lower than the estimation that provides by said method to the accuracy of the estimation of liquid line temperature, the simultaneously estimation in response to the liquid line temperature still can fill the HVAC system effectively.Determine these relations although more than described with three tests, will be appreciated that, also can use more than three tests and determine relation.

In certain embodiments, above-mentioned the first test, the second test and the 3rd test can be basically implemented respectively according to so-called " B ", " C " and " A " test in the standardized test method roughly, the test of putting down in writing in the test of putting down in writing among the 10CFR430 appendix M that describes in the federal law draft such as but not limited to USDOE (DOE) and/or U.S. air-conditioning heating and refrigerating association (AHRI) standard 210/240.Therefore, determine above-mentionedly can obtain by test with the necessary information of relation and/or data that outdoor environment temperature and suction line pressure change for estimation liquid line temperature, also need on the other hand to carry out these and test to obtain satisfied class of trade authentication.The B of at least one defined in the test of putting down in writing among the 10CFR430 appendix M that in the federal law draft, describes according to USDOE and/or the U.S.'s air-conditioning heating and refrigerating association criterion 210/240 in the test of record, C and A test, the outdoor environment temperature that B test (or first test) is implemented is 82 ℉, the Indoor Dry bulb temperature is 80 ℉, indoor wet-bulb temperature is 67 ℉, the outdoor environment temperature that C test (or second test) is implemented is 82 ℉, the Indoor Dry bulb temperature is 80 ℉, indoor wet-bulb temperature is 57 ℉ or lower (for example indoor wet-bulb temperature of about 47 ℉), and the outdoor environment temperature that A test (or the 3rd test) is implemented is 95 ℉, the Indoor Dry bulb temperature is 80 ℉, indoor wet-bulb temperature is 67 ℉.

According to the relation of setting up between above-mentioned data and liquid line temperature, suction line pressure and the outdoor environment temperature, can derive in the multiple equation any one to express the liquid line temperature according to outdoor environment temperature and suction line pressure.In one embodiment, derive according to the equation of outdoor environment temperature and suction line temperature estimation liquid line temperature as follows:

Liquid line temperature=(a* outdoor environment temperature)+(b* suction pressure)+c, herein,

And constant c determines from the test result of the first test, the second test and the 3rd test.

Should be appreciated that, no matter from carry out above-mentioned three tests, finally obtain which type of function and/or equation, consequent function and/or equation can be used for generating chart and/or the numerical matrix of the minimum liquid line temperature of target, and the minimum liquid line temperature of target is calculated according to may making up of outdoor environment temperature and suction pressure here.Equally, above-mentioned discovery can be refined in certain embodiments to be reduced to and be used figure and/or chart, this figure and/or chart can instruct HVAC system setter and/or technical staff suitably to fill the HVAC system.

Referring now to Fig. 3, it illustrates the filled Figure 30 0 according to the filled curve of said process structure.Especially, Figure 30 0 is by selecting specific HVAC system to test to generate, in the test of putting down in writing among the 10CFR430 appendix M that describes in the federal law draft according to USDOE and/or the U.S.'s air-conditioning heating and refrigerating association criterion 210/240 in the test of record at least one tested the HVAC system, satisfies simultaneously that to carry out be the needs of determining necessary the first test of functional relation, the second test and the 3rd test between liquid line temperature, suction line pressure and the outdoor environment temperature.After collecting test data and using above-mentioned equation, can construct at an easy rate and fill Figure 30 0, so that many filled curves 302 are applied in the cartesian coordinate system, wherein X-axis represents suction line pressure, and Y-axis represents the liquid line temperature.These filled curves 302 have the increment of 5 ℉.

Referring now to Fig. 4, can construct and fill chart 400, as filling Figure 30 0 and/or using at least one result in the above-mentioned equation, be used for determining the liquid line temperature according to suction line pressure and outdoor environment temperature.Filling chart 400 comprises by the numerical matrix that is distributed in a plurality of row and columns.Fill chart 400 by reference, the minimum liquid line temperature of target can be determined according to outdoor environment temperature (being expressed as row) and according to suction line pressure (being expressed as row).Fill chart 400 and also comprise the maximum hydraulic pressure row that is associated from different outdoor environment temperatures row, and the maximum hydraulic pressure that should not be filled when providing the HVAC system on this pressure.Should be appreciated that, although filling chart 400 is depicted as and comprises the row that are associated with outdoor environment temperature and illustrate with the form of the row of suction line pressure correlation connection, in alternate embodiment, these row also can join with suction line pressure correlation, and these row also can be associated with outdoor environment temperature simultaneously.

Referring now to Fig. 5 and Fig. 6 A-6D, it illustrates the method for simplifying that fills the HVAC system, should be appreciated that Fig. 5 has described a kind of filled method, and Fig. 5 and relevant discussion be with further reference to Fig. 6 A-6D, as the further elaboration method of execution graph 5 how.

The method 500 of shown in Figure 5 filled HVAC system 100 starts from piece 502, the most common, by measuring outdoor environment temperature, suction line pressure, liquid line temperature and liquid line pressure, method 500 allows HVAC systems 100 suitably to be filled, even also can be like this when other filled method (for example excessively cold) may be failed.The maximum liquid line pressure of method 500 by being filled to the minimum liquid line temperature of target that fills chart or filled chart (get its reach first) will guide setter and/or technical staff to fill HVAC system 100.

Method 500 starts from piece 502, and proceeds to piece 504.In piece 504, indoor environment temperature and outdoor environment temperature are examined to verify that these temperature are allowing suitably to fill in the prescribed limit of HVAC system 100 according to method 500.In certain embodiments, outdoor environment temperature need to about 60 ℉ or more than, and indoor environment temperature need to be between about 70 ℉ and 100 ℉.If indoor environment temperature is not in prescribed limit, it is consistent with prescribed limit that indoor environment temperature is changed to.If outdoor environment temperature is lower than 60 ℉, HVAC system 100 can use the suction line pressure of 60 ℉ and 115 pounds/square inchs (PSIG) to fill according to filled chart.

In piece 506, HVAC system 100 should make it stable in minimum about 10 minutes by operation under refrigeration mode.

In piece 508, should measure each in outdoor environment temperature, suction line pressure, liquid line pressure and the liquid line temperature.

In piece 510, should select to be suitable for the filled chart (see Fig. 6 A, wherein the example digital of outdoor unit 104 is illustrated, and it is circled at the top that fills chart) of HVAC system 100.

In piece 512, the outdoor environment temperature that records should be along the location, top (see Fig. 6 A, the outdoor environment temperature supposition that wherein records is 97 ℉) of selected filled chart.

In piece 514, the suction line pressure that records should be along the left positioner (see Fig. 6 B, the suction line pressure that wherein records is assumed to 130PSIG) that fills chart.

In piece 516, the minimum liquid line temperature of target should be confirmed as being positioned at and fill the outdoor environment temperature that records on the chart and be positioned at the place, crosspoint (seeing Fig. 6 C) that fills the suction line pressure that records on the chart.

In piece 518, if the minimum liquid line temperature of target drops on and fills on the chart two and list between the temperature, should estimate the minimum liquid line temperature of target (see Fig. 6 C, the minimum liquid line temperature of the target of estimation is assumed to 107 ℉).

In piece 520, maximum liquid line pressure should be positioned at and fill on the chart (seeing Fig. 6 D).

In piece 522, if the minimum liquid line temperature of target estimate, also should estimate similarly maximum liquid line pressure (see Fig. 6 D, the maximum liquid line pressure of wherein estimating is assumed to 414PSIG).

In piece 524, should determine and provide any needed charging amount adjustment.Being undertaken this by the liquid line temperature that relatively records and the minimum liquid line temperature of target determines.If the liquid line temperature that records on the minimum liquid line temperature of target, and does not exceed the maximum liquid line pressure that allows, should add cold-producing mediums to HVAC system 100.If the liquid line pressure that records is higher than the maximum liquid line pressure that allows, should from HVAC system 100, remove cold-producing medium.In addition, if the liquid line temperature that records is lower than the minimum liquid line temperature of target, should from HVAC system 100, remove cold-producing medium.

In order to add cold-producing medium to HVAC system 100, liquid refrigerant should be added in the HVAC system by filling mouth 128, until the minimum liquid line temperature of the liquid line temperature distance objective that records is in 1 to 2 ℉.In the alternate embodiments that does not comprise the HVAC system 100 that fills mouth 128, can add cold-producing mediums by suction line pressure tap 126.

In piece 526, HVAC system 100 should be again by moving HVAC system 100 at least 10 minutes so that it is stable under refrigeration mode.

After HVAC system 100 stablized, method 500 stopped at piece 528.

Should be appreciated that method 500 should repeat at piece 524 places, until do not need to do the charging amount adjustment.

Should be appreciated that further the method for any filled HVAC disclosed herein system may be used to fill so-called heat pump HVAC system, and without heat pump and/or other conventional HVAC system.

Disclose at least one embodiment, the in the art variation done for the feature of embodiment and/or embodiment of technical staff, combination and/or revise all falls within the scope of the invention.The alternate embodiments that draws by combination, some feature integrated and/or omission embodiment also all falls within the scope of the invention.In the situation of expressing statement digital scope or restriction, the scope of so expressing or limit and should be understood to: comprise fall into expressed statement scope or limit in the repeatedly scope of similar value or restriction (for example, from about 1 to about 10 just comprises 2,3,4 etc.; Just comprise 0.11,0.12,0.13 etc. greater than 0.10).For example, as long as disclose lower limit R1 and the upper limit Ru of digital scope, any numeral that falls into so in this scope is just disclosed particularly.Especially, following numeral in this scope is disclosed especially: R=R1+k * (Ru-R1), wherein, k is from 1% to 100% take 1% variable that changes as increment, that is, k is 1%, 2%, 3%, 4%, 5% ... 50%, 51%, 52% ... 95%, 96%, 97%, 98%, 99% or 100%.In addition, also just disclosed particularly by the digital any digital scope that defines of two R of above-mentioned definition.Key element for any claim is used term " alternatively ", need to refer to this key element or does not alternatively need this key element, and two kinds of substitute modes are all within the scope of claim.The term of the broad sense of use such as comprising, comprise and having should be understood to be providing support than the narrow sense term such as being comprised of what, mainly being comprised of what and roughly being comprised of what.Therefore, protection domain is not limited by the place of matchmakers of above elaboration, but is defined by attached claims, and this scope comprises all equivalents of claim theme.Each and each claim are brought in this specification as further disclosing, and claims are embodiments of the invention.

Claims (20)

1. the method for a filled HVAC system comprises:
Determine the relation between the outdoor environment temperature of the suction line pressure of liquid line temperature, this HVAC system of this HVAC system and this HVAC system.
2. method according to claim 1 is characterized in that, generates the equation that is used for estimation liquid line temperature, and wherein this equation is based on determined relation.
3. method according to claim 1 is characterized in that, also comprises:
Generate a plurality of filled curves based on determined relation;
Wherein every filled curve is associated with independent outdoor environment temperature.
4. method according to claim 1 is characterized in that, also comprises:
Generation is based on the filled chart of determined relation, and this chart comprises the numerical matrix of the liquid line temperature of determining according to each outdoor environment temperature of each suction line pressure of this HVAC system and this HVAC system.
5. method according to claim 4 is characterized in that, at least one in the described liquid line temperature value is positioned at the crosspoint of suction line force value row and outdoor environment temperature row.
6. method according to claim 4 is characterized in that, at least one in the described liquid line temperature value is positioned at suction line force value row and the capable crosspoint of outdoor environment temperature.
7. method according to claim 4 is characterized in that, filled curve comprises the maximum liquid line force value that at least one is associated with outdoor environment temperature.
8. the method for a filled HVAC system comprises:
Regulate the amount of cold-producing medium in this HVAC system, with near the minimum liquid line temperature of target.
9. method according to claim 8 is characterized in that, the minimum liquid line temperature of described target is determined according to the suction line pressure of this HVAC system and the outdoor environment temperature of this HVAC system.
10. method according to claim 8 is characterized in that, when the liquid line temperature that records is on the minimum liquid line temperature of target, cold-producing medium is added this HVAC system.
11. method according to claim 8 is characterized in that, when the liquid line pressure that records is higher than maximum permission liquid line pressure, removes cold-producing medium from this HVAC system.
12. method according to claim 8 is characterized in that, when the liquid line temperature that records is lower than the minimum liquid line temperature of target, removes cold-producing medium from this HVAC system.
13. the method for a filled HVAC system comprises:
Test this HVAC system according at least three group test parameters, two groups in three groups of test parameters are included in this HVAC system of test under the roughly the same outdoor environment temperature, and at least one groups in all the other group test parameters are included in this HVAC system of test under the different outdoor environment temperatures.
14. method according to claim 13 is characterized in that, also comprises:
Determine the relation between the outdoor environment temperature of the suction line pressure of liquid line temperature, this HVAC system of this HVAC system and this HVAC system, the test data that wherein said relation obtains based on this HVAC system of test.
15. method according to claim 14 is characterized in that, also comprises:
Generation comprises the filled chart of the numerical matrix of the minimum liquid line temperature of target.
16. method according to claim 14 is characterized in that, also comprises:
Generate the equation that is used for estimation liquid line temperature, wherein this equation is based on determined relation.
17. method according to claim 14 is characterized in that, also comprises:
Measure suction line pressure;
Measure outdoor environment temperature;
Measure the liquid line temperature; And
Charging amount in response to this HVAC system of liquid line adjustment that records of this HVAC system.
18. method according to claim 17 is characterized in that, relatively carries out adjusting to charging amount in response to the minimum liquid line temperature of the liquid line temperature that records and target.
19. method according to claim 15 is characterized in that, based on the suction line pressure of this HVAC system that records and the outdoor environment temperature of this HVAC system that records, determines the minimum liquid line temperature of target from this matrix.
20. method according to claim 16 is characterized in that, based on the suction line pressure of this HVAC system that records and the outdoor environment temperature of this HVAC system that records, uses this equation to calculate the minimum liquid line temperature of target.
CN201180013756.4A 2010-03-14 2011-03-14 For the system and method for filled HVAC system CN102893096B (en)

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CN102893096B (en) 2016-01-06
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US20110219790A1 (en) 2011-09-15
WO2011115913A3 (en) 2012-01-12
WO2011115913A2 (en) 2011-09-22

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