CN103968620B - Electric expansion valve and there is its refrigerating plant - Google Patents
Electric expansion valve and there is its refrigerating plant Download PDFInfo
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- CN103968620B CN103968620B CN201310033140.4A CN201310033140A CN103968620B CN 103968620 B CN103968620 B CN 103968620B CN 201310033140 A CN201310033140 A CN 201310033140A CN 103968620 B CN103968620 B CN 103968620B
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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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Abstract
The invention provides a kind of electric expansion valve and there is its refrigerating plant, electric expansion valve comprises valve port and needle, electric expansion valve controls needle according to the pulse signal received and moves up and down to change electronic expansion valve opening, and needle shape and valve port diameter are configured such that flow of electronic expansion valve curve has following characteristic: flow curve comprises starting point A, the first turning point B, the second turning point D and terminal E; The corresponding electric expansion valve full-shut position of starting point A, respective pulses number is zero, corresponding flow is Q
0; First turning point B respective pulses number is P
1, corresponding flow is Q
1; Second turning point D respective pulses number is P
2, corresponding flow is Q
2; The corresponding electric expansion valve full-gear of terminal E, respective pulses number is P
3, corresponding flow is Q3; Wherein, P
1≤ 6%P
3; P
2>=80%P
3; Q
0≤ Q
1; Q
1/ Q
2≤ 0.25; 0.3≤Q
2/ Q
3≤ 0.7.Electric expansion valve of the present invention, by changing pulse value corresponding to flow curve and flow value, improving degree of regulation, increasing throttle opening and adjustable range.
Description
Technical field
The present invention relates to refrigerating plant field, in particular to a kind of electric expansion valve and the refrigerating plant with it.
Background technology
Electric expansion valve is that one of throttling arrangement commonly used by domestic variable frequency room air conditioner, and variable working condition control characteristic is good, be easy to programme-control, contributes to reducing air-conditioner operation energy consumption.The discharge characteristic of electric expansion valve generally describes with flow curve, and owing to adopting the cone-shaped valve head being easy to process, therefore the flow curve of electric expansion valve is conic section, and part is propped up on the parabolical left side namely under shed.Electric expansion valve of the prior art is mainly applicable to the air-conditioning system of conventional refrigerant as HCFC22 and HFC410A.Fig. 1 shows the flow curve figure that cold-producing medium is the electric expansion valve of the room air conditioner use of the 3.2KW to 5.0KW of HFC410A.Wherein, the valve port diameter of this electric expansion valve is 1.65mm.
Cold-producing medium HCFC22 has destruction to be eliminated to ozone layer, and the HFC410A as transition cold-producing medium has higher greenhouse effects also by the verge of being replaced.HFC32, HC290 and HFOs and composition thereof have preferably environmental-protecting performance and become industry hot-candidate substitute.Relative HCFC22 and HFC410A, unit mass refrigerating capacity and the unit mass heating capacity of HFC32 are larger, when the ability of refrigerating plant is identical, the mass circulation flow of HFC32 in refrigerating plant is relatively little, use throttling arrangement of the same race as during electric expansion valve because required circulation area is less, easily cause that electric expansion valve throttle opening is less than normal, technical problem that adjustable range and degree of regulation all reduce, thus make electric expansion valve of the prior art can not meet the actual throttling demand of HFC32 refrigerating plant.
Summary of the invention
The present invention aims to provide a kind of electric expansion valve and has its refrigerating plant, improves expansion valve degree of regulation, increase the object of throttle opening and adjustable range to reach.
To achieve these goals, the invention provides a kind of electric expansion valve, the needle comprising valve port and coordinate with valve port, electric expansion valve controls the aperture moving up and down to change electric expansion valve of needle according to the pulse signal received, and the shape of needle and the diameter of valve port are configured such that the flow curve of electric expansion valve has following characteristic: flow curve comprises starting point A, the first turning point B, the second turning point D and terminal E; Starting point A corresponds to the full-shut position of electric expansion valve, and corresponding umber of pulse is zero, corresponding flow is Q
0; The umber of pulse that first turning point B is corresponding is P
1, corresponding flow is Q
1; The umber of pulse that second turning point D is corresponding is P
2, corresponding flow is Q
2; Terminal E corresponds to the full-gear of electric expansion valve, and corresponding umber of pulse is P
3, corresponding flow is Q
3; Wherein, P
1≤ 6%P
3; P
2>=80%P
3; Q
0≤ Q
1; Q
1/ Q
2≤ 0.25; 0.3≤Q
2/ Q
3≤ 0.7.
Further, needle comprises the control section of the aperture controlling electric expansion valve, the control section axis comprised along needle connects the first control valve section, the second control valve section and the 3rd control valve section that arrange successively, and the first control valve section, the second control valve section and the 3rd control valve section control the flow curve between starting point A and the first turning point B, between the first turning point B and the second turning point D and between the second turning point D and terminal E respectively.
Further, the first control valve section is cylindrical section; Second control valve section is the first conical section, and the first end of the first conical section connects with cylindrical section and diameter is identical, and the first conical section reduces successively along the orient diameter away from cylindrical section; 3rd control valve section is the second conical section, and the second conical section connects with the second end of the first conical section and diameter is identical, and the second conical section reduces successively along the orient diameter away from the first conical section, and the cone angle of the first conical section is less than the cone angle of the second conical section.
Further, the first conical section has the first cone angle a, wherein, and 0 ° of < a≤(12d-0.5d
2) °, the second conical section has the second cone angle b, (12d-0.5d
2) ° < b≤150 °, wherein, d is the value of diameter of the valve port (20) of described electric expansion valve, the scope of d is 0.5-10, and the unit of this diameter is mm.
Further, the flow Q that flow curve first turning point B is corresponding
1the flow Q corresponding with the second turning point D
2ratio be 0.1 to 0.2.
Further, the flow Q that flow curve second turning point D is corresponding
2the flow Q corresponding with the 3rd turning point E
3ratio be 0.35 to 0.65.
Further, the flow that terminal E is corresponding
wherein, d is the value of the diameter of the valve port of electric expansion valve, and the scope of d is 0.5-10, and the unit of this diameter is mm, ε is electric expansion valve import and the absolute pressure ratio of outlet, and T is the value of the absolute temperature of electric expansion valve import medium, the unit of this absolute temperature is K.
The invention provides a kind of refrigerating plant, comprise above-mentioned electric expansion valve.
Further, during regulation test traffic by JB/T10212-2011, the flow Q that the second turning point D of flow of electronic expansion valve curve is corresponding
2be 2.5L/minKW to 3.0L/minKW with the ratio size of the specified refrigerating capacity C of refrigerating plant.
Further, the mixture of the cold-producing medium of refrigerating plant to be HFC32 or mass ratio be HFC32 and the HFO1234yf of more than 70% or mass ratio are the mixture of HFC32 and the HFO1234ze of more than 70%, and the size of the specified refrigerating capacity C of refrigerating plant is 2.0KW to 16KW.
Further, the cold-producing medium of refrigerating plant is HFC161, and the size of the specified refrigerating capacity C of refrigerating plant is 2.0KW to 12.5KW.
Further, during the regulation test traffic of JB/T10212-2011, the flow Q that the second turning point D of flow of electronic expansion valve curve is corresponding
2be 3.5L/minKW to 4.2L/minKW with the ratio size of the specified refrigerating capacity C of refrigerating plant.
Further, the cold-producing medium of refrigerating plant is HC290, and the size of the specified refrigerating capacity C of refrigerating plant is 1.5KW to 5.0KW.
Further, the cold-producing medium of refrigerating plant is HCFC22, and the size of the specified refrigerating capacity C of refrigerating plant is 2.0KW to 16KW.
Further, during regulation test traffic by JB/T10212-2011, the flow Q that the second turning point D of flow of electronic expansion valve curve is corresponding
2be 3.0L/minKW to 3.7L/minKW with the ratio size of the specified refrigerating capacity C of refrigerating plant.
Further, the cold-producing medium of refrigerating plant is HFC410A, and the size of the specified refrigerating capacity C of refrigerating plant is 2.0KW to 16KW.
Further, the cold-producing medium of refrigerating plant is HC1270, and the size of the specified refrigerating capacity C of refrigerating plant is 1.5KW to 5.0KW.
Apply electric expansion valve of the present invention, by reducing the flow curve slope between the first turning point B and the second turning point D, reduce the flow value that the second turning point D is corresponding, increase the pulse difference between the first turning point B and the second turning point D simultaneously, thus reach the degree of regulation improving electric expansion valve, increase the object of throttle opening and adjustable range.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow curve figure of electric expansion valve of the prior art;
Fig. 2 is the structural representation according to electric expansion valve in the embodiment of the present invention;
Fig. 3 is the upward view of Fig. 2;
Fig. 4 is the flow curve figure of middle electric expansion valve according to a first embodiment of the present invention;
Fig. 5 is the flow curve figure of middle electric expansion valve according to a second embodiment of the present invention;
Fig. 6 is the flow curve figure of middle electric expansion valve according to a third embodiment of the present invention;
Fig. 7 is the flow curve figure of middle electric expansion valve according to a fourth embodiment of the present invention;
Fig. 8 is the flow curve figure of middle electric expansion valve according to a fifth embodiment of the present invention;
Fig. 9 is the flow curve figure of middle electric expansion valve according to a sixth embodiment of the present invention;
Figure 10 is the flow curve figure of middle electric expansion valve according to a seventh embodiment of the present invention;
Figure 11 is the needle diametric representation of electric expansion valve according to a second embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The invention provides a kind of electric expansion valve, the needle comprising valve port and coordinate with valve port, valve port is the upper end open of valve core through hole.Electric expansion valve controls needle according to the pulse signal that receives and moves up and down to change the fit clearance of needle and valve port thus change the aperture of electric expansion valve.The shape of needle and the diameter of valve port are configured such that the flow curve of electric expansion valve has following feature: flow curve comprises starting point A, the first turning point B, the second turning point D and terminal E.Starting point A corresponds to the full-shut position of electric expansion valve, and the umber of pulse that above-mentioned starting point A is corresponding is zero, corresponding flow is Q
0.The umber of pulse that first turning point B is corresponding is P
1, corresponding flow is Q
1.The umber of pulse that second turning point D is corresponding is P
2, corresponding flow is Q
2.Terminal E corresponds to the full-gear of electric expansion valve.The umber of pulse that above-mentioned terminal E is corresponding is P
3, corresponding flow is Q
3.Wherein, P
1≤ 6%P
3; P
2>=80%P
3; Q
0≤ Q
1; Q
1/ Q
2≤ 0.25; 0.3≤Q
2/ Q
3≤ 0.7.
Apply electric expansion valve of the present invention, by reducing the flow curve slope between the first turning point B and the second turning point D, reduce the flow value that the second turning point D is corresponding, increase the pulse difference between the first turning point B and the second turning point D simultaneously, thus reach the degree of regulation improving electric expansion valve, increase the object of throttle opening and adjustable range.
In the present invention, needle comprises the control section of the aperture controlling electric expansion valve, the control section axis comprised along needle connects the first control valve section, the second control valve section and the 3rd control valve section that arrange successively, wherein, the first control valve section, the second control valve section and the 3rd control valve section control the flow curve between starting point A and the first turning point B, between the first turning point B and the second turning point D and between the second turning point D and terminal E respectively.
Particularly, as shown in Figures 2 and 3, in embodiments of the present invention, the first control valve section of needle 10 is cylindrical section.Second control valve section is the first conical section, and the first end of the first conical section connects with cylindrical section and diameter is identical, and the first conical section reduces successively along the orient diameter away from cylindrical section.3rd control valve section is the second conical section, and the second conical section connects with the second end of the first conical section and diameter is identical, and the second conical section reduces successively along the orient diameter away from the first conical section, and the cone angle of the first conical section is less than the cone angle of the second conical section.
Preferably, the first conical section has the first cone angle a, wherein, and 0 ° of < a≤(12d-0.5d
2) °.Second conical section has the second cone angle b, wherein, and (12d-0.5d
2) ° < b≤150 °, d is the value of the diameter of the valve port 20 of electric expansion valve, scope is 0.5-10, and the unit of this diameter is mm.
Further, on the cross section at needle 10 axis place, cylindrical section is provided with primary importance A1 and second place B1.Wherein, second place B1 is the tie point of cylindrical section and the first conical section, the line of primary importance A1 and second place B1 and the axis being parallel of needle 10.
On the aforementioned cross section at needle 10 axis place, the tie point of the first conical section and the second conical section is the 3rd position D1, and wherein, the 3rd position D1 and second place B1 is all in the same side of needle 10 axis.
On the aforementioned cross section at needle 10 axis place, the end of the second conical section is provided with the 4th position E1, and wherein, the 4th position E1 and the 3rd position D1 is all in the same side of needle 10 axis.
It should be noted that, above embodiment does not enough become restriction to the present invention, and such as, in a kind of not shown embodiment, the cross section molded line of the second control valve section is the first curve, and the cross section molded line of the 3rd control valve section is the second curve.This curve can be such as parabola.And the first curve and the second curve make electric expansion valve have following effect: P
1≤ 6%P
3; P
2>=80%P
3; Q
0≤ Q
1; Q
1/ Q
2≤ 0.25; 0.3≤Q
2/ Q
3≤ 0.7, in the present embodiment except above feature, other are all identical with the feature in above-described embodiment.
The flow Q that in above embodiment, flow curve first turning point B is corresponding
1the flow Q corresponding with the second turning point D
2ratio be 0.1 to 0.2.Further, the flow Q that flow curve second turning point D is corresponding
2the flow Q corresponding with the 3rd turning point E
3ratio be 0.35 to 0.65.
The flow that terminal E is corresponding
wherein, d is the value of the diameter of the valve port 20 of electric expansion valve, and scope is 0.5-10, and the unit of this diameter is mm.ε is electric expansion valve import and the absolute pressure ratio of outlet.T is the value of the absolute temperature of electric expansion valve import medium, and the unit of this absolute temperature is K.
It is the electric expansion valve of 1.0mm that first embodiment of the invention provides a kind of valve port 20 diameter, and the flow curve of this electric expansion valve as shown in Figure 4.Particularly, the umber of pulse that starting point A, the first turning point B of flow of electronic expansion valve curve in the present embodiment, the second turning point D and terminal E are corresponding and flow value are as shown in Table 1.
It is the electric expansion valve of 1.3mm that second embodiment of the invention provides a kind of valve port 20 diameter, and the flow curve of this electric expansion valve as shown in Figure 5.Particularly, the umber of pulse that starting point A, the first turning point B of flow of electronic expansion valve curve in the present embodiment, the second turning point D and terminal E are corresponding and flow value are as shown in Table 1.
It is the electric expansion valve of 1.4mm that third embodiment of the invention provides a kind of valve port 20 diameter, and the flow curve of this electric expansion valve as shown in Figure 6.Particularly, the umber of pulse that starting point A, the first turning point B of flow of electronic expansion valve curve in the present embodiment, the second turning point D and terminal E are corresponding and flow value are as shown in Table 1.
It is the electric expansion valve of 1.65mm that fourth embodiment of the invention provides a kind of valve port 20 diameter, and the flow curve of this electric expansion valve as shown in Figure 7.Particularly, the umber of pulse that starting point A, the first turning point B of flow of electronic expansion valve curve in the present embodiment, the second turning point D and terminal E are corresponding and flow value are as shown in Table 1.
It is the electric expansion valve of 1.8mm that fifth embodiment of the invention provides a kind of valve port 20 diameter, and the flow curve of this electric expansion valve as shown in Figure 8.Particularly, the umber of pulse that starting point A, the first turning point B of flow of electronic expansion valve curve in the present embodiment, the second turning point D and terminal E are corresponding and flow value are as shown in Table 1.
It is the electric expansion valve of 2.4mm that sixth embodiment of the invention provides a kind of valve port 20 diameter, and the flow curve of this electric expansion valve as shown in Figure 9.Particularly, the umber of pulse that starting point A, the first turning point B of flow of electronic expansion valve curve in the present embodiment, the second turning point D and terminal E are corresponding and flow value are as shown in Table 1.
It is the electric expansion valve of 2.5mm that seventh embodiment of the invention provides a kind of valve port 20 diameter, and the flow curve of this electric expansion valve as shown in Figure 10.Particularly, the umber of pulse that starting point A, the first turning point B of flow of electronic expansion valve curve in the present embodiment, the second turning point D and terminal E are corresponding and flow value are as shown in Table 1.
Table one electric expansion valve each embodiment characteristic pulse number and the feature air mass flow table of comparisons
The concrete methods of realizing of the flow curve in the embodiment of the present invention is explained further by the detailed description of the second embodiment.The flow curve figure of second embodiment of the invention is shown in Fig. 5, and in figure, starting point A, the first turning point B of curve, the second turning point D and terminal E are corresponding with primary importance A1, the second place B1 of needle in Fig. 2 10, the 3rd position D1 and the 4th position E1 respectively.When valve port 20 is between primary importance A1 and second place B1, needle 10 is in cylindrical section and the diameter of cylindrical section is less than valve port 20 diameter, the circumferential weld gap that needle 10 and valve port 20 are formed moving up and down and change not with needle 10, thus AB section flow in corresponding diagram 5 is constant.When valve port 20 is between second place B1 and the 3rd position D1, needle 10 be in the first conical section and the cone angle of the first conical section between 0 ° ~ 12d-0.5d
2, the circumferential weld gap that needle 10 and valve port 20 are formed moves up with needle 10 and slowly increases, thus the BD section flow in corresponding diagram 5 slowly increases with umber of pulse increase.When valve port 20 is between the 3rd position D1 and the 4th position E1, needle 10 be in the second conical section and the cone angle of the second conical section between 12d-0.5d
2~ 150 °, the circumferential weld gap that needle 10 and valve port 20 are formed moves up with needle 10 and increases rapidly, thus the DE section flow in corresponding diagram 5 increases sharply with umber of pulse increase.By design needle 10 diameter and with valve port 20 diametric fit after can obtain required flow curve.
It should be noted that, the needle 10 diameter figure coordinated with valve port 20 in the second embodiment is shown in Figure 11, and wherein A2, B2, D2, E2 of curve are corresponding with primary importance A1, the second place B1 of the needle 10 in Fig. 2, the 3rd position D1 and the 4th position E1 respectively.From in figure, the diameter of needle increases with umber of pulse and reduces, and namely when curve is in A2B2 section, cylindrical section and the valve port 20 of needle 10 are equipped with.When curve is in B2D2 section, the first conical section and the valve port 20 of needle 10 are equipped with.When curve is in D2E2 section, the second conical section and the valve port 20 of needle 10 are equipped with.
Present invention also offers a kind of refrigerating plant, comprise above electric expansion valve.
Wherein, during the regulation test traffic of this refrigerating plant by JB/T10212-2011, the flow Q that the second turning point D of flow of electronic expansion valve curve is corresponding
2can be 2.5L/(minKW with the ratio k size of the specified refrigerating capacity C of refrigerating plant) to 3.0L/(minKW).
Ratio k size is 2.5L/(minKW) to 3.0L/(minKW) when, when the mixture of the cold-producing medium of refrigerating plant to be HFC-32 or mass ratio be HFC32 and the HFO1234yf of more than 70% or mass ratio are the mixture of HFC-32 and the HFO1234ze of more than 70%, the size of the specified refrigerating capacity C of refrigerating plant is 2.0KW to 16KW.
Particularly, eighth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HFC32.The specified refrigerating capacity C of this refrigerating plant is 2.0KW to 2.6KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the first embodiment to be the electric expansion valve of 1.0mm.
Ninth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HFC32.The specified refrigerating capacity C of this refrigerating plant is 2.6KW to 3.6KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the second embodiment to be the electric expansion valve of 1.3mm.
Tenth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HFC32.The specified refrigerating capacity C of this refrigerating plant is 5.0KW to 7.2KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the 4th embodiment to be the electric expansion valve of 1.65mm.
Eleventh embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HFC32.The specified refrigerating capacity C of this refrigerating plant is 10KW to 15KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the 6th embodiment to be the electric expansion valve of 2.4mm.
Ratio k size is 2.5L/(minKW) to 3.0L/(minKW) when, when the cold-producing medium of refrigerating plant is HFC161, the size of the specified refrigerating capacity C of refrigerating plant is 2.0KW to 12.5KW.
Particularly, twelveth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HFC161.The specified refrigerating capacity C of this refrigerating plant is 2.0KW to 2.6KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the first embodiment to be the electric expansion valve of 1.0mm.
Thriteenth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HFC161.The specified refrigerating capacity C of this refrigerating plant is 2.6KW to 3.6KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the second embodiment to be the electric expansion valve of 1.3mm.
Fourteenth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HFC161.The specified refrigerating capacity C of this refrigerating plant is 5.0KW to 7.2KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the 4th embodiment to be the electric expansion valve of 1.65mm.
Further, during the regulation test traffic of refrigerating plant by JB/T10212-2011, the flow Q that the second turning point D of flow of electronic expansion valve curve is corresponding
2can also be 3.5L/(minKW with the ratio k size of the specified refrigerating capacity C of refrigerating plant) to 4.2L/(minKW).
Ratio k size is 3.5L/(minKW) to 4.2L/(minKW) when, when the cold-producing medium of refrigerating plant is HC290, the size of the specified refrigerating capacity C of refrigerating plant is 1.5KW to 5.0KW.
Particularly, fifteenth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HC290.The specified refrigerating capacity C of this refrigerating plant is 2.6KW to 3.6KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the 3rd embodiment to be the electric expansion valve of 1.4mm.
Ratio k size is 3.5L/(minKW) to 4.2L/(minKW) when, when the cold-producing medium of refrigerating plant is HCFC22, the size of the specified refrigerating capacity C of refrigerating plant is 2.0KW to 16KW.
Sixteenth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HCFC22.The specified refrigerating capacity C of this refrigerating plant is 2.6KW to 3.6KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the 3rd embodiment to be the electric expansion valve of 1.4mm.
Seventeenth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HCFC22.The specified refrigerating capacity C of this refrigerating plant is 5.0KW to 7.2KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the 5th embodiment to be the electric expansion valve of 1.8mm.
Eighteenth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HCFC22.The specified refrigerating capacity C of this refrigerating plant is 10KW to 15KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the 7th embodiment to be the electric expansion valve of 2.5mm.
During regulation test traffic by JB/T10212-2011, the ratio k size of the specified refrigerating capacity C of the flow Q2 that the second turning point D of flow of electronic expansion valve curve is corresponding and refrigerating plant can also be 3.0L/(minKW) to 3.7L/(minKW).
Ratio k size is 3.0L/(minKW) to 3.7L/(minKW) when, when the cold-producing medium of refrigerating plant is HFC410A, the size of the specified refrigerating capacity C of refrigerating plant is 2.0KW to 16KW.
Nineteenth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HFC410A.The specified refrigerating capacity C of this refrigerating plant is 2.6KW to 3.6KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the 3rd embodiment to be the electric expansion valve of 1.4mm.
Twentieth embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HFC410A.The specified refrigerating capacity C of this refrigerating plant is 5.0KW to 7.2KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the 5th embodiment to be the electric expansion valve of 1.8mm.
21st embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HFC410A.The specified refrigerating capacity C of this refrigerating plant is 10KW to 15KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the 7th embodiment to be the electric expansion valve of 2.5mm.
Ratio k size is 3.0L/(minKW) to 3.7L/(minKW) when, when the cold-producing medium of refrigerating plant is HC1270, the size of the specified refrigerating capacity C of refrigerating plant is 1.5KW to 5.0KW.
22nd embodiment of the invention provides the refrigerating plant that a kind of cold-producing medium is HC1270.The specified refrigerating capacity C of this refrigerating plant is 2.6KW to 3.6KW.Above-mentioned refrigerating plant adopts valve port 20 diameter d in the 3rd embodiment to be the electric expansion valve of 1.4mm.
Flow in above embodiment, all according to the specifying measurement of JB/T10212-2011, is namely measure under the condition of the dry air of 0.1MPa gauge pressure or the humid air of low water capacity at entrance.
Further, above-mentioned refrigerating plant comprises frequency-conversion air-conditioning system.
From above description, can find out, the above embodiments of the present invention achieve following technique effect: apply electric expansion valve of the present invention, by changing pulse value corresponding to the starting point of flow of electronic expansion valve curve, the first turning point, the second turning point and terminal and flow value, to reach the degree of regulation improving electric expansion valve, increase the object of throttle opening and adjustable range.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. an electric expansion valve, the needle (10) comprising valve port (20) and coordinate with described valve port (20), described electric expansion valve controls the aperture moving up and down to change described electric expansion valve of described needle (10) according to the pulse signal received, it is characterized in that, the shape of described needle (10) and the diameter of described valve port (20) are configured such that the flow curve of described electric expansion valve has following characteristic:
Described flow curve comprises starting point (A), the first turning point (B), the second turning point (D) and terminal (E);
Described starting point (A) is corresponding to the full-shut position of described electric expansion valve, and corresponding umber of pulse is zero, corresponding flow is Q
0;
The umber of pulse of described first turning point (B) correspondence is P
1, corresponding flow is Q
1;
The umber of pulse of described second turning point (D) correspondence is P
2, corresponding flow is Q
2;
Described terminal (E) is corresponding to the full-gear of described electric expansion valve, and corresponding umber of pulse is P
3, corresponding flow is Q
3;
Wherein,
P
1≤6%P
3；
P
2≥80%P
3；
Q
0≤Q
1；
Q
1/Q
2≤0.25；
0.3≤Q
2/Q
3≤0.7。
2. electric expansion valve according to claim 1, it is characterized in that, described needle (10) comprises the control section of the aperture controlling described electric expansion valve, the described control section axis comprised along described needle (10) connects the first control valve section arranged successively, second control valve section and the 3rd control valve section, described first control valve section, second control valve section and the 3rd control valve section control between described starting point (A) and described first turning point (B) respectively, between described first turning point (B) and described second turning point (D), and the flow curve between described second turning point (D) and described terminal (E).
3. electric expansion valve according to claim 2, is characterized in that,
Described first control valve section is cylindrical section;
Described second control valve section is the first conical section, and the first end of described first conical section connects with described cylindrical section and diameter is identical, and described first conical section reduces successively along the orient diameter away from described cylindrical section;
Described 3rd control valve section is the second conical section, described second conical section connects with the second end of described first conical section and diameter is identical, described second conical section reduces successively along the orient diameter away from described first conical section, and the cone angle of described first conical section is less than the cone angle of described second conical section.
4. electric expansion valve according to claim 3, is characterized in that,
Described first conical section has the first cone angle a, wherein, and 0 ° of < a≤(12d-0.5d
2) °, described second conical section has the second cone angle b, (12d-0.5d
2) ° < b≤150 °, wherein, d is the value of the diameter of the valve port (20) of described electric expansion valve, and the scope of d is 0.5-10, and the unit of this diameter is mm.
5. electric expansion valve according to claim 1, is characterized in that, the flow Q that described flow curve first turning point (B) is corresponding
1the flow Q corresponding with described second turning point (D)
2ratio be 0.1 to 0.2.
6. electric expansion valve according to any one of claim 1 to 5, is characterized in that, the flow Q that described flow curve second turning point (D) is corresponding
2the flow Q corresponding with described 3rd turning point (E)
3ratio be 0.35 to 0.65.
7. electric expansion valve according to claim 1, is characterized in that, the flow that described terminal (E) is corresponding
wherein, d is the value of the diameter of the valve port (20) of described electric expansion valve, the scope of d is 0.5-10, the unit of this diameter is mm, ε is described electric expansion valve import and the absolute pressure ratio of outlet, and T is the value of absolute temperature of described electric expansion valve import medium, the unit of this absolute temperature is K.
8. a refrigerating plant, comprises electric expansion valve, it is characterized in that, described electric expansion valve is electric expansion valve according to any one of claim 1 to 7.
9. refrigerating plant according to claim 8, is characterized in that, during regulation test traffic by JB/T10212-2011, and the flow Q that second turning point (D) of described flow of electronic expansion valve curve is corresponding
2be 2.5L/(minKW with the ratio size of the specified refrigerating capacity C of described refrigerating plant) to 3.0L/(minKW).
10. refrigerating plant according to claim 9, it is characterized in that, the mixture of the cold-producing medium of described refrigerating plant to be HFC32 or mass ratio be HFC32 and the HFO1234yf of more than 70% or mass ratio are the mixture of HFC32 and the HFO1234ze of more than 70%, and the size of the specified refrigerating capacity C of described refrigerating plant is 2.0KW to 16KW.
11. refrigerating plants according to claim 9, is characterized in that, the cold-producing medium of described refrigerating plant is HFC161, and the size of the specified refrigerating capacity C of described refrigerating plant is 2.0KW to 12.5KW.
12. refrigerating plants according to claim 8, is characterized in that, during regulation test traffic by JB/T10212-2011, and the flow Q that second turning point (D) of described flow of electronic expansion valve curve is corresponding
2be 3.5L/(minKW with the ratio size of the specified refrigerating capacity C of described refrigerating plant) to 4.2L/(minKW).
13. refrigerating plants according to claim 12, is characterized in that, the cold-producing medium of described refrigerating plant is HC290, and the size of the specified refrigerating capacity C of described refrigerating plant is 1.5KW to 5.0KW.
14. refrigerating plants according to claim 12, is characterized in that, the cold-producing medium of described refrigerating plant is HCFC22, and the size of the specified refrigerating capacity C of described refrigerating plant is 2.0KW to 16KW.
15. refrigerating plants according to claim 8, is characterized in that, during regulation test traffic by JB/T10212-2011, and the flow Q that second turning point (D) of described flow of electronic expansion valve curve is corresponding
2be 3.0L/(minKW with the ratio size of the specified refrigerating capacity C of described refrigerating plant) to 3.7L/(minKW).
16. refrigerating plants according to claim 15, is characterized in that, the cold-producing medium of described refrigerating plant is HFC410A, and the size of the specified refrigerating capacity C of described refrigerating plant is 2.0KW to 16KW.
17. refrigerating plants according to claim 15, is characterized in that, the cold-producing medium of described refrigerating plant is HC1270, and the size of the specified refrigerating capacity C of described refrigerating plant is 1.5KW to 5.0KW.
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| CN103968620B true CN103968620B (en) | 2016-03-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6676432B2 (en) * | 2016-03-28 | 2020-04-08 | 株式会社不二工機 | Electric valve and method of assembling the same |
| JP6359593B2 (en) * | 2016-06-14 | 2018-07-18 | 株式会社鷺宮製作所 | Motorized valve |
| DE102017214941A1 (en) | 2017-08-25 | 2019-02-28 | Dometic Sweden Ab | Recreational vehicle, cooling device, control system and method of controlling the cooling device |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| CN109458464B (en) * | 2018-11-20 | 2024-03-22 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| CN113483453A (en) * | 2021-07-13 | 2021-10-08 | 珠海格力电器股份有限公司 | Control method and device for air conditioning equipment, electronic equipment and storage medium |
| CN216158328U (en) * | 2021-09-02 | 2022-04-01 | 苏州华越金属有限公司 | Valve needle and electronic expansion valve with same |
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