CN1959305A - Method for controlling electric expansion valve of air condition - Google Patents
Method for controlling electric expansion valve of air condition Download PDFInfo
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- CN1959305A CN1959305A CNA2005101175042A CN200510117504A CN1959305A CN 1959305 A CN1959305 A CN 1959305A CN A2005101175042 A CNA2005101175042 A CN A2005101175042A CN 200510117504 A CN200510117504 A CN 200510117504A CN 1959305 A CN1959305 A CN 1959305A
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- expansion valve
- superheat
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- electronic expansion
- temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
A method for controlling electronic expansion valve of air conditioner includes separately measuring temperature of freezing mixture at outlet of compressor and temperature of freezing mixture at inlet and outlet of evaporator, calculating out temperature difference between inlet and outlet of evaporator, setting object overheat degree based on calculated overheat degree and using overheat degree to decide opening angle of electronic expansion valve.
Description
Technical field
The present invention relates to a kind of electronic expansion valve control method of air-conditioning, particularly relate to a kind of temperature of the condensing agent that spues in the compressor and air conditioner electronic expansion valve door control method of degree of superheat control electronic expansion valve of utilizing.
Background technology
General air-conditioning comprises compressor, freezing machine, electronic expansion valve and evaporimeter.Wherein, above-mentioned compressor compression condensation agent; The effect of above-mentioned freezing machine is, the condensation of gas agent of the HTHP that liquefaction is fed to from compressor; The effect of above-mentioned electronic expansion valve is that the fluid pressure that condensing agent is fed to high pressure expands; The effect of above-mentioned evaporimeter is, the condensing agent that gasification is fed to from the electronic expansion valve, thereby cooling surrounding air.
In addition, the flow of control condensing agent when the electronic expansion valve is carried out expansion condensing agent function, thereby finish optimum cooling-heating room circulation, in order to control the flow of condensing agent, poor (promptly with the inlet temperature of evaporimeter, the degree of superheat) and the temperature that spues of the condensing agent that spues from compressor be benchmark, regulate its opening angle.
That is, the direction and the opening angle of electronic expansion valve running, the value of the temperature that spues of the condensing agent that spues with the value of the worthwhile degree of superheat with from compressor decides, and by its worthwhile value.Is the degree of superheat and the compressor temperature maintenance that spues certain value.
But in air-conditioning initial stage running step, because of the transformed value of spue the temperature inversion value and the degree of superheat of compressor is opposite, if directly use the worthwhile value of above-mentioned two values, the stable used time of circulation can postpone and reduction air conditioner cold-warm room ability comprehensively.
This shows that the electronic expansion valve control method of above-mentioned existing air-conditioning obviously still has inconvenience and defective, and demands urgently further being improved in method and use.The problem that exists for the electronic expansion valve control method that solves air-conditioning, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and conventional method does not have appropriate method to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that the electronic expansion valve control method of above-mentioned existing air-conditioning exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of electronic expansion valve control method of new air-conditioning, can improve the electronic expansion valve control method of general existing air-conditioning, make it have more practicality.Through constantly research, design, and after studying repeatedly and improving, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective of the electronic expansion valve control method existence of existing air-conditioning, and provide a kind of electronic expansion valve control method of new air-conditioning, technical problem to be solved is when making the degree of superheat of the spue temperature and the evaporimeter of its compressor be maintained certain value, can stablize the cooling-heating room circulation rapidly, thereby be suitable for practicality more.
The electronic expansion valve control method of the air-conditioning that proposes according to the present invention, it may further comprise the steps: temperature and the outlet side condensing agent temperature of measuring the spue temperature and the evaporator inlet side condensing agent of the condensing agent that spues respectively from compressor; Calculate that evaporimeter is gone into, the temperature difference of outlet side condensing agent (that is the degree of superheat); The target degree of superheat of the degree of superheat that relatively calculates and setting, only utilize the opening angle of degree of superheat decision electronic expansion valve or take all factors into consideration the degree of superheat and the temperature that spues of compressor after decision again.
The object of the invention to solve the technical problems also can adopt following technical measures further to realize.
Aforesaid air conditioner electronic expansion valve door control method, the degree of superheat that calculates be during less than the target degree of superheat, the opening angle of electronic expansion valve is opened into transformed value according to the degree of superheat till.
Aforesaid air conditioner electronic expansion valve door control method, when the degree of superheat that calculates has surpassed the target degree of superheat, the target temperature of the compressor of the spue temperature and the setting of comparison compressor, thereby the opening angle of setting electronic expansion valve.
When aforesaid air conditioner electronic expansion valve door control method, the target temperature of the compressor that the temperature that spues of compressor surpass to be set, will be open into the electronic expansion valve on the position of the temperature inversion value that spues that degree of superheat transformed value adds compressor.
Aforesaid air conditioner electronic expansion valve door control method, the temperature that spues of compressor be during less than the target temperature of the compressor of setting, and will deduct the transformed value that the electronic expansion valve is opened into the degree of superheat on the position of the temperature inversion value that spues of compressor.
By technique scheme, make the electronic expansion valve control method of air-conditioning of the present invention have tangible technological progress, the present invention has following advantage at least:
1, according to the present invention, when the air-conditioning primary starting, only utilize the degree of superheat control electronic expansion valve of evaporimeter, later on when the degree of superheat reaches certain level, utilize the degree of superheat and the compressor temperature that spues to control the electronic expansion valve simultaneously.
2, the present invention reduces conflicting interval by the spue appropriate combination of transformed value and degree of superheat transformed value of temperature of compressor.So, shortened the stable initial point of air-conditioning circulation, thereby improved the cooling-heating room ability of air-conditioning comprehensively.
In sum, the electronic expansion valve control method of the air-conditioning that the present invention is special can improve the cooling-heating room ability of air-conditioning.It has above-mentioned many advantages and practical value, and in class methods, do not see have similar design to publish or use and really genus innovation, no matter it is all having bigger improvement on method or on the function, have large improvement technically, and produced handy and practical effect, and the electronic expansion valve control method of more existing air-conditioning has the multinomial effect of enhancement, thereby is suitable for practicality more, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the circulation pie graph according to air-conditioning of the present invention.
Fig. 2 is the movable block figure according to air-conditioning of the present invention.
Fig. 3 is for air conditioner electronic expansion valve door control method flow chart according to the present invention.
10: compressor 11: the compressor exit temperature sensor
20: freezing machine 30: the electronic expansion valve
40: evaporimeter 41: the evaporator inlet temperature sensor
42: evaporator outlet temperature sensor 50: control part
The specific embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, its specific embodiment of electronic expansion valve control method, method, step, feature and the effect thereof of the air-conditioning that foundation the present invention is proposed, describe in detail as after.
Below, see also illustrated in figures 1 and 2ly, Fig. 1 is the circulation pie graph according to air-conditioning of the present invention; Fig. 2 is the movable block figure according to air-conditioning of the present invention.
Air-conditioning according to the present invention comprises compressor, freezing machine, electronic expansion valve, evaporimeter.Wherein, above-mentioned compressor is used for the compression condensation agent; The effect of above-mentioned freezing machine is, the condensation of gas agent of the HTHP that liquefaction is fed to from compressor; The effect of above-mentioned electronic expansion valve is that the fluid pressure that condensing agent is become high pressure expands; The effect of above-mentioned evaporimeter is, the condensing agent that gasification is fed to from the electronic expansion valve, thereby cooling surrounding air.
In addition, electronic expansion valve 30 is regulated the flow of condensing agent, thereby transfer to optimum cooling-heating room circulation, the passage that spues of compressor 10 is provided with compressor exit temperature sensor 11 for this reason, and the entrance and exit of evaporimeter 40 is respectively arranged with evaporator inlet temperature sensor 41 and evaporator outlet temperature sensor 42.
Then, will be input to control part 50 to the condensing agent that spues on the compressor 10 the going into of temperature and the evaporimeter 40/outlet temperature poor (that is, the degree of superheat) that spues, thereby regulate electronic expansion valve 30.
See also shown in Figure 3, for for air conditioner electronic expansion valve door control method flow chart according to the present invention.
As shown in Figure 3, at first, the temperature that spues of the condensing agent that compressor exit temperature sensor 11 mensuration compressors 10 spue is input to control part 50 then; And evaporator inlet temperature sensor 41 and evaporator outlet temperature sensor 42 are input to control part 50 respectively after measuring the entrance side condensing agent temperature of evaporimeter 40 and outlet side condensing agent temperature respectively.
In addition, it is poor (promptly that control part 50 calculates the inlet temperature and the outlet temperature of evaporimeter 40 of input, the degree of superheat) afterwards (S12), the degree of superheat of having calculated more and the predefined target degree of superheat (± α '), thereby the opening angle (S13) of decision electronic expansion valve 30.
Here, when the degree of superheat does not reach the target degree of superheat (± α '), degree of superheat transformed value λ and spuing in the temperature inversion value β input process, (β-α) is input as 0 (S15) the temperature inversion value that spues.
After, the final LEV change value of the addition degree of superheat transformed value λ and the temperature inversion value β decision electronic expansion valve 30 that spues (λ+β) (S16), and according to the final LEV change value of electronic expansion valve 30 (the unlocking electronic expansion valve 30 (S17) of λ+β).
In addition, in the step (S13) of the degree of superheat that relatively calculates and the predefined target degree of superheat (± α '), when the degree of superheat that calculates surpasses the target degree of superheat (± α '), the target temperature that compares the spue temperature and the predefined compressor 10 of compressor 10, thereby the opening angle (S14) of decision electronic expansion valve 30.
Here, when the temperature that spues of compressor 10 surpasses the target temperature of the compressor of setting 10, behind the input degree of superheat transformed value λ and the temperature inversion value β that spues (S15), the degree of superheat transformed value λ and the temperature inversion value β that spues decide final LEV change value (λ+β) (S16), and along with the final LEV change value of electronic expansion valve 30 (the unlocking electronic expansion valve 30 (S17) of λ+β) of electronic expansion valve 30.
But, compressor 10 spue temperature when setting the target temperature of compressor 10, (S15 "); will deduct the temperature inversion value β that spues to degree of superheat transformed value λ and become the transformed value of electronic expansion valve 30 (S16 "), and behind the input degree of superheat transformed value λ and the temperature inversion value β that spues along with the final LEV change value of electronic expansion valve 30 (the unlocking electronic expansion valve 30 (S17) of λ-β).
As mentioned above, control method according to electronic expansion valve 30 of the present invention, when the air-conditioning initial stage drives, because of the temperature action that spues of the degree of superheat and compressor 10 opposite, step is only utilized the degree of superheat control electronic expansion valve 30 of evaporimeter 40 in the early stage, later on when the degree of superheat reaches certain level, be suitable for compressor 10 control of temperature sensor that spues simultaneously, thereby the timeliness that the initial stage that minimizes takes place is lost.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (5)
1, a kind of air conditioner electronic expansion valve door control method is characterized in that it may further comprise the steps:
Measure the temperature and the outlet side condensing agent temperature of the spue temperature and the evaporator inlet side condensing agent of the condensing agent that from compressor, spues respectively;
Calculate that evaporimeter is gone into, the temperature difference of outlet side condensing agent, that is, and the degree of superheat;
The target degree of superheat of the degree of superheat that relatively calculates and setting, only utilize the opening angle of degree of superheat decision electronic expansion valve or take all factors into consideration the degree of superheat and the temperature that spues of compressor after decision again.
2, air conditioner electronic expansion valve door control method according to claim 1, when it is characterized in that the degree of superheat that calculates is less than the target degree of superheat, the opening angle of electronic expansion valve is opened into transformed value according to the degree of superheat till.
3, air conditioner electronic expansion valve door control method according to claim 1, when it is characterized in that the degree of superheat that calculates has surpassed the target degree of superheat, the target temperature of the compressor of the spue temperature and the setting of comparison compressor, thereby the opening angle of setting electronic expansion valve.
4, air conditioner electronic expansion valve door control method according to claim 3, when it is characterized in that the target temperature of the compressor that the temperature that spues of compressor surpass to be set, will be open into the electronic expansion valve on the position of the temperature inversion value that spues that degree of superheat transformed value adds compressor.
5, air conditioner electronic expansion valve door control method according to claim 3, the temperature that spues that it is characterized in that compressor is during less than the target temperature of the compressor of setting, and will deduct the transformed value that the electronic expansion valve is opened into the degree of superheat on the position of the temperature inversion value that spues of compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101175042A CN1959305A (en) | 2005-11-02 | 2005-11-02 | Method for controlling electric expansion valve of air condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101175042A CN1959305A (en) | 2005-11-02 | 2005-11-02 | Method for controlling electric expansion valve of air condition |
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| Publication Number | Publication Date |
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| CN1959305A true CN1959305A (en) | 2007-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2005101175042A Pending CN1959305A (en) | 2005-11-02 | 2005-11-02 | Method for controlling electric expansion valve of air condition |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836860A (en) * | 2012-11-21 | 2014-06-04 | 力博特公司 | Expansion valve setpoint control systems and methods |
| CN104634033A (en) * | 2015-01-28 | 2015-05-20 | 中国科学院青岛生物能源与过程研究所 | Electronic expansion valve control system and method |
| CN102165194B (en) * | 2008-09-26 | 2015-11-25 | 开利公司 | Compressor discharge on transport refrigeration system controls |
| CN103868299B (en) * | 2012-12-13 | 2016-06-15 | 美的集团股份有限公司 | The fine adjustment control method of electric expansion valve and system |
| US10174977B2 (en) | 2012-11-21 | 2019-01-08 | Vertiv Corporation | Apparatus and method for subcooling control based on superheat setpoint control |
-
2005
- 2005-11-02 CN CNA2005101175042A patent/CN1959305A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102165194B (en) * | 2008-09-26 | 2015-11-25 | 开利公司 | Compressor discharge on transport refrigeration system controls |
| US9599384B2 (en) | 2008-09-26 | 2017-03-21 | Carrier Corporation | Compressor discharge control on a transport refrigeration system |
| CN103836860A (en) * | 2012-11-21 | 2014-06-04 | 力博特公司 | Expansion valve setpoint control systems and methods |
| US9746224B2 (en) | 2012-11-21 | 2017-08-29 | Liebert Corporation | Expansion valve setpoint control systems and methods |
| CN103836860B (en) * | 2012-11-21 | 2018-04-10 | 力博特公司 | Expansion valve setpoint control system and method |
| US10174977B2 (en) | 2012-11-21 | 2019-01-08 | Vertiv Corporation | Apparatus and method for subcooling control based on superheat setpoint control |
| CN103868299B (en) * | 2012-12-13 | 2016-06-15 | 美的集团股份有限公司 | The fine adjustment control method of electric expansion valve and system |
| CN104634033A (en) * | 2015-01-28 | 2015-05-20 | 中国科学院青岛生物能源与过程研究所 | Electronic expansion valve control system and method |
| CN104634033B (en) * | 2015-01-28 | 2018-03-20 | 中国科学院青岛生物能源与过程研究所 | A kind of electronic expansion valve controls system and method |
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Open date: 20070509 |