CN110608309A - Electronic expansion valve and air conditioner refrigerating system thereof - Google Patents

Electronic expansion valve and air conditioner refrigerating system thereof Download PDF

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Publication number
CN110608309A
CN110608309A CN201810635103.3A CN201810635103A CN110608309A CN 110608309 A CN110608309 A CN 110608309A CN 201810635103 A CN201810635103 A CN 201810635103A CN 110608309 A CN110608309 A CN 110608309A
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CN
China
Prior art keywords
valve
port
electronic expansion
medium
guide sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810635103.3A
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Chinese (zh)
Inventor
陈锋
赵俊
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Zhejiang DunAn Hetian Metal Co Ltd
Original Assignee
Zhejiang DunAn Hetian Metal Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang DunAn Hetian Metal Co Ltd filed Critical Zhejiang DunAn Hetian Metal Co Ltd
Priority to CN201810635103.3A priority Critical patent/CN110608309A/en
Publication of CN110608309A publication Critical patent/CN110608309A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/124—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lift Valve (AREA)
  • Details Of Valves (AREA)

Abstract

The invention relates to the technical field of air-conditioning refrigeration, in particular to an electronic expansion valve and an air-conditioning refrigeration system thereof. An electronic expansion valve comprises a valve body, a valve core seat, a valve needle assembly and a guide sleeve, wherein a first medium port and a valve cavity are formed in the valve body; the first medium inlet is communicated with the valve cavity; the valve core seat is arranged in the valve cavity, and a valve port and a second medium port are formed in the valve core seat; the valve needle assembly is arranged in the guide sleeve and controls the opening or closing of the valve port under the guidance of the guide sleeve, so that the first medium port and the second medium port are communicated or closed; the aperture of the valve port is D, and the range of D is that D is more than or equal to 2.0mm and less than or equal to 3.2 mm; the volume flow of the refrigerant at the valve port is V, and the range of V is as follows: 9m3/h≤V≤22m3H; the diameter of the distribution hole is d, and the range of d is more than or equal to 2.7mm and less than or equal to 3.2 mm. The invention also provides an air-conditioning refrigeration system.

Description

Electronic expansion valve and air conditioner refrigerating system thereof
Technical Field
The invention relates to the technical field of air-conditioning refrigeration, in particular to an electronic expansion valve and an air-conditioning refrigeration system thereof.
Background
In an air-conditioning refrigeration system, an electronic expansion valve is mainly used for throttling and depressurizing and regulating flow. The existing electronic expansion valve comprises a valve body, a shell, a guide sleeve, a valve rod assembly, a screw rod assembly, a driving mechanism and other parts. The shell is arranged on the valve body, a medium inlet (A port), a valve port and a medium outlet (B port) are formed in the valve body, and the screw rod assembly and the guide sleeve are arranged on the valve body; the valve rod assembly is arranged in the guide sleeve and moves along the guide sleeve under the action of the driving mechanism to open or close the valve port so as to control the conduction or the closure between the medium inlet and the medium outlet, thereby achieving the purposes of throttling, reducing pressure and regulating flow.
The existing electronic expansion valve is generally used in a one-way mode; namely: the refrigerant enters from the medium inlet (A port) and flows out from the medium outlet (B port) (A port flows to B port) under the control of the valve rod assembly. With the development of the air-conditioning and refrigeration industry, it is more and more desirable that the electronic expansion valve can be used in two directions, i.e., the refrigerant can flow from the port a to the port B and also from the port B to the port a.
In the conventional electronic expansion valve, when the refrigerant flows from the port B to the port A, the refrigerant is easy to accumulate in the guide sleeve, so that a whistle is generated in the valve body, and the comfort is poor.
Disclosure of Invention
In view of the above, it is desirable to provide an electronic expansion valve and an air conditioning and cooling system thereof, which can eliminate the squeal and have better comfort.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electronic expansion valve comprises a valve body, a valve core seat, a valve needle assembly and a guide sleeve, wherein a first medium port and a valve cavity are formed in the valve body; the first medium inlet is communicated with the valve cavity; the valve core seat is arranged in the valve cavity, and a valve port and a second medium port are formed in the valve core seat; the valve needle assembly is arranged in the guide sleeve and controls the opening or closing of the valve port under the guidance of the guide sleeve, so that the first medium port and the second medium port are communicated or closed; the aperture of the valve port is D, and the range of D is that D is more than or equal to 2.0mm and less than or equal to 3.2 mm; the method is characterized in that: the guide sleeve is provided with at least one distribution hole for distributing flow, and the distribution hole is communicated with the valve cavity;
in the application, when the caliber D of the valve port is between 2.0mm and 3.2mm, the diameter D matched with the distribution hole is set between 2.7mm and 3.2 mm; therefore, when the volume flow rate of the refrigerant at the valve port is 9m in the process that the refrigerant flows from the second medium port to the first medium port3/h≤V≤22m3And when the pressure is higher than the preset pressure, the refrigerant can not be accumulated in the guide sleeve, and the refrigerant can flow out of the distribution hole in time, so that the valve body and the guide sleeve are prevented from generating squealing noise, and the use comfort of a user is improved.
In one embodiment, the cross-sectional area of the dispensing orifice is at least 3 times the cross-sectional area of the valve port.
In one embodiment, the guide sleeve is provided with a guide hole, and the valve needle assembly is arranged in the guide hole; 2-6 distribution holes are formed in the hole wall of the guide hole and are communicated with the guide hole.
In one embodiment, the guide sleeve has an inner side and an outer side which are opposite to each other, and the aperture d of the dispensing hole is gradually reduced from the inner side of the guide sleeve to the outer side of the guide sleeve.
In one embodiment, each of the dispensing apertures is flared.
In one embodiment, the valve ports comprise a first valve port, a second valve port and a third valve port, the second valve port is positioned between the first valve port and the third valve port, the first valve port is close to the guide sleeve, the caliber of the second valve port is D1, and the D1 range is 2.0mm ≦ D1 ≦ 3.2 mm.
In one embodiment, the cross section of the first valve port is in an inverted trapezoid shape, the cross section of the second valve port is in a rectangular shape, and the cross section of the third valve port is in a trapezoid shape.
In one embodiment, the valve body is provided with a mounting hole, and the inner wall of the mounting hole is provided with a first step; the valve core seat is provided with a second step, the valve core seat is arranged in the mounting hole, and the second step is abutted against the first step.
In one embodiment, a first medium pipe is connected to the first medium port, and a second medium pipe is connected to the second medium port; the refrigerant enters through the first medium pipe and flows out of the second medium pipe; or the refrigerant enters from the second medium pipe and flows out from the first medium pipe.
The invention also provides the following technical scheme:
an air-conditioning refrigeration system comprises the electronic expansion valve.
Compared with the prior art, when the caliber D of the valve port is between 2.0mm and 3.2mm, the aperture D matched with the distribution hole is arranged between 2.7mm and 3.2mm in the air-conditioning refrigeration system of the electronic expansion valve machine; therefore, when the volume flow rate of the refrigerant at the valve port is 9m in the process that the refrigerant flows from the second medium port to the first medium port3/h≤V≤22m3And when the pressure is higher than the preset pressure, the refrigerant can not be accumulated in the guide sleeve and can timely flow out of the distribution hole, so that the valve body and the guide sleeve are prevented from generating squeal, and the use comfort of a user is improved.
Drawings
Fig. 1 is a sectional view of an electronic expansion valve provided in the present invention;
FIG. 2 is an enlarged view at I of FIG. 1 according to the present invention;
FIG. 3 is a cross-sectional view of a valve body provided by the present invention;
FIG. 4 is a cross-sectional view of a guide sleeve provided by the present invention;
fig. 5 is a cross-sectional view of a valve cartridge seat provided by the present invention.
In the figure, the electronic expansion valve 100, the valve body 10, the first medium port 11, the first medium pipe 11a, the valve chamber 12, the guide sleeve 121, the guide hole 121a, the distribution hole 121b, the inner side 121c of the guide sleeve, the outer side 121d of the guide sleeve, the connecting piece 122, the mounting hole 13, the first step 131, the valve core seat 20, the first end 20a of the valve core seat, the second end 20b of the valve core seat, the valve port 21, the first valve port 211, the second valve port 212, the third valve port 213, the second medium port 22, the second medium pipe 22a, the second step 23, the valve needle assembly 30, the valve needle sleeve 31, the valve needle 32, the first spring seat 33, the second spring seat 34, the elastic member 35, the guide seat 36, the ball 37, the screw assembly 40, the screw 41, the nut sleeve 42, the positioning step 421, the housing 50, the rotor assembly 60, the rotor 61, the adapter plate 62, the mounting piece 64, and.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, the present invention provides an air conditioning and refrigeration system including an electronic expansion device 100 and other components. The electronic expansion valve 100 is used for regulating the flow rate of the air-conditioning refrigeration system and throttling and reducing pressure.
Referring to fig. 2, the electronic expansion valve 100 includes a valve body 10, a valve core seat 20, a valve needle assembly 30, a screw assembly 40, a housing 50, a rotor assembly 60, and a stator assembly (not shown). The needle assembly 30, the screw assembly 40 and the housing 50 are mounted on the valve body 10. The screw assembly 40 has one end connected to the needle assembly 30 and the other end connected to the rotor assembly 60. The rotor assembly 60 is disposed within the housing 50, and the stator assembly (not shown) is disposed on the housing 50. The stator assembly (not shown) is powered on to generate a magnetic field, and the rotor assembly 60 is rotated under the action of the magnetic field, and the rotor assembly 60 drives the screw assembly 40 to move, so that the valve needle assembly 30 moves to open or close the electronic expansion valve 100, and the purposes of adjusting the flow rate and throttling and reducing the pressure are achieved.
Referring to fig. 3, the valve body 10 has an axis X, and the valve body 10 is substantially cylindrical, but in other embodiments, the valve body 10 may have other shapes, such as: rectangular, etc.
The valve body 10 is provided with a first medium port 11 for allowing a refrigerant to flow in or out, a valve cavity 12 and a mounting hole 13. The first medium port 11 is communicated with the valve chamber 12. In this embodiment, the first medium port 11 can also be referred to as a port a, and the valve needle assembly 30 is disposed in the valve chamber 12. The mounting hole 13 is used for mounting the valve core seat 20.
Preferably, the first medium port 11 is opened on a side wall of the valve body 10, and the mounting hole 13 is opened at one end of the valve body 10 along the axis X direction of the valve body 10.
Further, a first medium pipe 11a is connected to the first medium port 11, the first medium pipe 11a may also be referred to as an a pipe, and the first medium pipe 11a is used for conveying a refrigerant.
Referring to fig. 1 and 4, a guide sleeve 121 is disposed in the valve chamber 12. The guide sleeve 121 is mounted on the valve core seat 20. The guide sleeve 121 is substantially cylindrical. The guide sleeve 121 has an axis Y, and the axis Y of the guide sleeve 121 is arranged to coincide with the axis X of the valve body 10. The guide sleeve 121 is provided with a guide hole 121a penetrating through the guide sleeve 121 along the axis Y direction. The valve needle assembly 30 is installed in the guide sleeve 121 and moves by the guide hole 121. Furthermore, at least one distribution hole 121b for uniformly distributing the refrigerant is formed in the side wall of the guide sleeve 121. The dispensing hole 121b communicates with the guide hole 121 a.
Further, the number of the dispensing holes 121b is 2 to 6, and 2 to 6 of the dispensing holes 121b are uniformly arranged along the circumferential direction of the guide sleeve 121. The diameter of each distribution hole 121b is d, and d is within the range of 2.7mm to 3.2 mm.
Preferably, the guide sleeve 121 has an inner side 121c and an outer side 121d which are oppositely arranged, and the bore diameter d of each dispensing hole 121b decreases from the inner side 121c of the guide sleeve to the outer side 121d of the guide sleeve in turn to form a trumpet-shaped dispensing hole 121 b. The minimum aperture of the trumpet-shaped distribution hole 121b is d1, and the range of d1 is 2.7mm-3.2 mm-1.
In this embodiment, the number of the distribution holes 121b is 4, and 4 distribution holes 121b are uniformly formed along the circumferential direction of the guide sleeve 121, so that the refrigerant flowing from the first medium port 11 can uniformly flow into the guide sleeve 121.
Further, a connecting piece 122 is arranged in the valve cavity 12. The connecting piece 122 is welded to the valve body 10 by welding or the like. The screw assembly 40 is mounted on the connecting piece 122.
The inner wall of the mounting hole 13 has a first step 131, and the first step 131 is used to cooperate with the valve core seat 20 to mount the valve core seat 20.
Referring to fig. 5, the valve core seat 20 has a first end 20a and a second end 20b opposite to each other. The valve cartridge seat 20 is partially mounted in the mounting bore 13 with the first end 20a of the valve cartridge seat located in the valve chamber 12 and the second end 20b of the valve cartridge seat extending from the mounting bore 13 and located outside the valve body 10.
The valve core seat 20 has an axis Z, and the axis Z of the valve core seat 20 is overlapped with the axis X of the valve body 10. The valve core seat 20 is provided with a valve port 21 and a second medium port 22 for flowing out or in of a refrigerant along an axis Z of the valve core seat 20. The valve needle assembly 30 cooperates with the valve port 21 to achieve communication or closure between the first media port 11 and the second media port 22.
In this embodiment, the refrigerant enters the valve chamber 12 from the first medium port 11 (port a), and flows out from the second medium port 22 (port B) through the distribution hole 121B and the control of the valve needle assembly 30, which is referred to as a forward operation of the electronic expansion valve 100. The refrigerant enters from the second medium port 22 (port B), and flows out from the first medium port 11 (port a) through the distribution hole 121B and the valve chamber 12 under the control of the valve needle assembly 30, which is called reverse operation of the electronic expansion valve 100.
The caliber of the valve port 21 is D, and the range of D is that D is more than or equal to 2.0mm and less than or equal to 3.2 mm; the cross-sectional area of the valve port 21 is greater than 3 times the cross-section of the dispensing orifice 121 b. Therefore, when the electronic expansion valve 100 is used in the forward direction, the distribution hole 121b performs primary throttling and pressure reduction on the refrigerant flow and simultaneously uniformly distributes the refrigerant, so that the refrigerant can uniformly enter the valve port 21. Further, the valve port 21 performs secondary throttling and pressure reduction on the refrigerant.
When the electronic expansion valve 100 is used in the reverse direction, the valve port 21 throttles and depressurizes the refrigerant for the first time and then enters the guide sleeve 121, and the distribution holes 121b discharge the refrigerant in the guide sleeve in time, so that the refrigerant is prevented from being accumulated in the guide sleeve 121 and generating a turbulent flow phenomenon.
In the present embodiment, the distribution hole 121b has 4, and the sum of the cross-sectional areas of the 4 distribution holes 121b is greater than 3 times the cross-sectional area of the valve port 21.
Further, the valve port 21 includes a first valve port 211, a second valve port 212, and a third valve port 213, and the second valve port 212 is located between the first valve port 211 and the third valve port 213. The first valve port 211 is disposed close to the guide sleeve; i.e. at the first end 20a of the valve cartridge seat. The caliber of the second valve port 212 is D1, and the D1 range is that D1 is not less than 2.0mm and not more than 3.2 mm. The third port 213 is located at the second end 20b of the valve cartridge seat.
Preferably, the cross section of the first valve port 211 is in an inverted trapezoid shape. The cross section of the second valve port 212 is rectangular, and the second valve port 212 is used for being matched with the valve needle assembly 30. The third valve port 213 has a trapezoidal cross-section. The aperture of the second port 212 is smaller than or equal to the apertures of the first port 211 and the third port 213.
Here, the cross section of the first valve port 211 is formed in an inverted trapezoid shape, so that the first valve port 211 has a certain guiding effect on the refrigerant, and is beneficial to the loss of the refrigerant pressure before the high-pressure refrigerant enters the second valve port 212, thereby improving the accuracy of the electronic expansion valve 100 in adjusting the refrigerant pressure.
The second medium port 22 is connected to a second medium pipe 22a, the second medium pipe 22a may also be referred to as a pipe B, and the second medium pipe 22a is used for conveying a refrigerant.
A second step 23 is arranged on the valve core seat 20. When the valve core seat 20 is installed in the installation hole 13, the second step 23 abuts against the first step 131, so that the valve core seat 20 is installed in the installation hole 13. Further, the valve core seat 20 is hermetically connected with the inner wall of the mounting hole 13 to prevent the refrigerant from leaking from the mounting hole 13.
The needle assembly 30 includes a needle sleeve 31 mounted in the guide sleeve 121, and a needle 32 mounted on the needle sleeve 31. The valve needle 32 has an axis, and the axis of the valve needle 32 is arranged coincident with the axis X of the valve body 10. One end of the valve needle 32 is connected to the screw assembly 40, and the other end is engaged with the valve port 11. The screw assembly 40 drives the valve needle 32 to move to control the opening or closing of the valve port 11, so as to realize the opening/closing of the electronic expansion valve 100.
The needle assembly 30 further includes a first spring seat 33, a second spring seat 34, a resilient member 35, and a guide seat 36. The guide seat 36 is mounted on the valve needle sleeve 31 and cooperates with the screw assembly 40. The elastic element 35 is disposed between the first spring seat 33 and the second spring seat 34, so as to make the contact between the valve needle 32 and the valve port 21 flexible. The second spring seat 34 abuts the valve needle 32. Preferably, a ball 37 is disposed between the second spring seat 34 and the valve needle 32. The ball 37 and the valve needle 32 are welded by spot welding. The balls 37 make point contact with the second spring seat 34 to reduce friction between the second spring seat 34 and the valve needle 32.
Further, an end of the valve needle 32 away from the second spring seat 34 is provided with a conical surface, and the conical surface is used for cooperating with an inner wall of the second valve port 212 to close the second valve port 212.
The screw assembly 40 includes a screw 41 and a nut bushing 42 coupled to the screw 41. The screw rod 41 has a first end and a second end which are oppositely arranged, the first end of the screw rod 41 is connected with the rotor assembly 60, and the second end of the screw rod 41 is inserted into the nut sleeve 42 and connected with the second spring seat 34. One end of the nut sleeve 42 is mounted on the connecting piece 122, and the other end is located in the housing 50.
Further, a positioning step 421 is arranged in the nut sleeve 42, and one end of the guide sleeve 121 is mounted on the valve core seat 20; the other end of the guide sleeve 121 is located in the nut sleeve 42 and abuts against the positioning step 421, so that the guide sleeve 121 is positioned, and the guide sleeve 121 is prevented from moving axially and generating noise.
The rotor assembly 60 includes a rotor 61 located in the housing 50, an adapter plate 62 for mounting the screw 41, a limiting spring 63 for limiting a rotation angle of the rotor, and a mounting plate 64 for mounting the limiting spring 63. The rotor 61 is mounted on the adapter plate 62, and the adapter plate 62 is in threaded connection with the screw 41. The limiting spring 63 is sleeved on the nut sleeve 42, one end of the limiting spring 63 is connected with the mounting piece 64, and the other end of the limiting spring 63 is fixed with the connecting piece 122. When the electronic expansion valve 100 is powered on, the rotor 61 is rotated, so that the screw rod 41 is rotated, and the valve needle 32 is driven to move to control the opening or closing of the valve port 11, thereby controlling the flow rate of the electronic expansion valve 100.
The stator assembly (not shown) includes a coil and other components, and is configured to generate a magnetic field after being energized, and drive the rotor 61 to rotate under the action of the magnetic field, so as to rotate the screw rod 41.
Further, in this embodiment, the sound frequency of the refrigerant entering from the second medium port 22 (port B) and flowing out from the first medium port 11 (port a) through the distribution hole 121B and the valve chamber 12 under the control of the valve needle assembly 30 is greater than or equal to 50 db, which is called a "whistle sound"; when the refrigerant enters from the second medium port 22 (port B), and flows out from the first medium port 11 (port a) through the distribution hole 121B and the valve chamber 12 under the control of the valve needle assembly 30, the emitted sound frequency is less than 50 db, which is called fluid sound.
The following data table is obtained by the test experiments.
Example 1: the aperture D of the valve port is 2.0mm, and the flow volume V of the valve port is 9.0m3H, respectively taking the pore diameters d of the distribution holes as follows: 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, the tests wait to the following data table.
From the above table, when the flow volume V at the valve port is 9.0m3H, the caliber D of the valve port is 2.0 mm; when the aperture d of the distribution hole is within the range of 2.7mm-3.2mm, the refrigerant flowing to the port B from the port A is uniformly distributed, and the purposes of throttling and pressure reduction can be achieved; the refrigerant flows from port B to port a, both being fluid sound.
Example 2: the aperture D of the valve port is 2.2mm, and the flow volume V of the valve port is 11.0m3And h, respectively taking the distribution holes: 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, the tests wait to the following data table.
From the above table, when the flow volume V at the valve port is 11.0m3H, the caliber D of the valve port is 2.2 mm; when the aperture d of the distribution hole is within the range of 2.7mm-3.2mm, the refrigerant flowing to the port B from the port A is uniformly distributed, and the purposes of throttling and pressure reduction can be achieved; the refrigerant flows from port B to port a, both being fluid sound.
Example 3: the aperture D of the valve port is 2.4mm, and the flow volume V of the valve port is 13.0m3And h, respectively taking the distribution holes: 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, the tests wait to the following data table.
From the above table, when the flow volume V at the valve port is 13.0m3H, the caliber D of the valve port is 2.4 mm; when the aperture d of the distribution hole is within the range of 2.7mm-3.2mm, the refrigerant flowing to the port B from the port A is uniformly distributed, and the purposes of throttling and pressure reduction can be achieved; the refrigerant flows from port B to port a, both being fluid sound.
Example 4: the aperture D of the valve port is 2.6mm, and the flow volume V of the valve port is 14.0m3And h, respectively taking the distribution holes: 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, the following data table was obtained by testing.
From the above table, when the flow volume V at the valve port is 14.0m3H, the caliber D of the valve port is 2.6 mm; when the aperture d of the distribution hole is within the range of 2.7mm-3.2mm, the refrigerant flowing to the port B from the port A is uniformly distributed, and the purposes of throttling and pressure reduction can be achieved; the refrigerant flows from port B to port a, both being fluid sound.
Example 5: the aperture D of the valve port is 2.8mm, and the flow volume V of the valve port is 16.0m3And h, respectively taking the distribution holes: 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, the following data table was obtained by testing.
From the above table, when the flow volume V at the valve port is 16.0m3H, the caliber D of the valve port is 2.8 mm; when the aperture d of the distribution hole is within the range of 2.7mm-3.2mm, the refrigerant flowing to the port B from the port A is uniformly distributed, and the purposes of throttling and pressure reduction can be achieved; the refrigerant flows from port B to port a, both being fluid sound.
Example 6: the aperture D of the valve port is 3.0mm, and the flow volume V of the valve port is 18.0m3And h, respectively taking the distribution holes: 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, the following data table was obtained by testing.
From the above table, when the flow volume V at the valve port is 18.0m3H, the caliber D of the valve port is 3.0 mm; when the aperture d of the distribution hole is within the range of 2.7mm-3.2mm, the refrigerant flowing to the port B from the port A is uniformly distributed, and the purposes of throttling and pressure reduction can be achieved; the refrigerant flows from port B to port a, both being fluid sound.
Example 7: the aperture D of the valve port is 3.0mm, and the flow volume V of the valve port is 20m3And h, respectively taking the distribution holes: 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, the following data table was obtained by testing.
From the above table, when the flow volume V at the valve port is 20.0m3H, the caliber D of the valve port is 3.2 mm; when the aperture d of the distribution hole is within the range of 2.7mm-3.2mm, the refrigerant flowing to the port B from the port A is uniformly distributed, and the purposes of throttling and pressure reduction can be achieved; the refrigerant flows from port B to port a, both being fluid sound.
Example 8: the aperture D of the valve port is 3.2mm, and the flow volume V of the valve port is 22.0m3And h, respectively taking the distribution holes: 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, the following data table was obtained by testing.
From the above table, when the flow volume V at the valve port is 22.0m3H, the caliber D of the valve port is 3.2 mm; when the aperture d of the distribution hole is within the range of 2.7mm-3.2mm, the refrigerant flowing to the port B from the port A is uniformly distributed, and the purposes of throttling and pressure reduction can be achieved; the refrigerant flows from port B to port a, both being fluid sound.
Comparative example 1:
the difference from example 1 is that: the aperture of the distribution hole is 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm and 2.6mm respectively. The following data table was obtained by testing.
From the above table, when the flow volume V at the valve port is 9.0m3H, the caliber D of the valve port is 2.0 mm; when the aperture d of the distribution hole is 1.9mm-2.6mm or smaller, the refrigerant flowing to the port B from the port A is uniformly distributed, and the purposes of throttling and pressure reduction can be achieved; however, the refrigerant flows from port B to port a with a squeal sound.
It should be understood that in the above table, the flow volume V at the valve port is set to 11.0m3/h、V＝13.0m3/h、V＝14.0m3/h、V＝16.0m3/h、V＝18.0m3/h、V＝20.0m3H or V22.0 m3And when the pressure is in the range of the pressure, the flow volume at the valve port is increased under the condition that other numerical values are not changed, namely more refrigerants pass through the valve port in unit time. That is, the refrigerant flows from the port B to the port a with a whistle sound.
Comparative example 2:
the difference from example 8 is that: the aperture of the distribution hole is respectively 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm and 4.0 mm. The following data table was obtained by testing.
From the above table, when the flow volume V at the valve port is 22.0m3/h、The caliber D of the valve port is 3.2 mm; when the aperture d of the distribution hole is between 3.3mm and 4.0mm or a larger value is obtained, the refrigerant flowing to the port B from the port A is distributed unevenly, and the purposes of throttling and pressure reduction cannot be achieved; however, the flow of the refrigerant from port B to port a is fluid sound.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An electronic expansion valve comprises a valve body, a valve core seat, a valve needle assembly and a guide sleeve, wherein a first medium port and a valve cavity are formed in the valve body; the first medium inlet is communicated with the valve cavity; the valve core seat is arranged in the valve cavity, and a valve port and a second medium port are formed in the valve core seat; the valve needle assembly is arranged in the guide sleeve and controls the opening or closing of the valve port under the guidance of the guide sleeve, so that the first medium port and the second medium port are communicated or closed; the aperture of the valve port is D, and the range of D is that D is more than or equal to 2.0mm and less than or equal to 3.2 mm; the method is characterized in that: the guide sleeve is provided with at least one distribution hole for distributing flow, and the distribution hole is communicated with the valve cavity; the diameter of the distribution hole is d, and the range of d is more than or equal to 2.7mm and less than or equal to 3.2 mm.
2. The electronic expansion valve of claim 2, wherein: the cross-sectional area of the dispensing orifice is at least 3 times the cross-sectional area of the valve port.
3. The electronic expansion valve of claim 1, wherein: the guide sleeve is provided with an inner side and an outer side which are oppositely arranged, and the aperture d of the distribution hole is gradually reduced from the inner side of the guide sleeve to the outer side of the guide sleeve.
4. The electronic expansion valve of claim 3, wherein: each distribution hole is trumpet-shaped.
5. The electronic expansion valve of claim 1, wherein: the guide sleeve is provided with a guide hole, and the valve needle assembly is arranged in the guide hole; 2-6 distribution holes are formed in the hole wall of the guide hole and are communicated with the guide hole.
6. The electronic expansion valve of claim 1, wherein: the valve ports comprise a first valve port, a second valve port and a third valve port, the second valve port is located between the first valve port and the third valve port, the first valve port is close to the guide sleeve, the caliber of the second valve port is D1, and the D1 range is that D1 is larger than or equal to 2.0mm and smaller than or equal to 3.2 mm.
7. The electronic expansion valve of claim 5, wherein: the cross section of the first valve port is in an inverted trapezoid shape, the cross section of the second valve port is in a rectangular shape, and the cross section of the third valve port is in a trapezoid shape.
8. The electronic expansion valve of claim 1, wherein: the valve body is provided with a mounting hole, and the inner wall of the mounting hole is provided with a first step; the valve core seat is provided with a second step, the valve core seat is arranged in the mounting hole, and the second step is abutted against the first step.
9. The electronic expansion valve of claim 1, wherein: the first medium port is connected with a first medium pipe, and the second medium port is connected with a second medium pipe; the refrigerant enters through the first medium pipe and flows out of the second medium pipe; or the refrigerant enters from the second medium pipe and flows out from the first medium pipe.
10. An air conditioning refrigeration system characterized by: the air conditioning refrigeration system comprises an electronic expansion valve, wherein the electronic expansion valve is the electronic expansion valve according to any one of claims 1 to 9.
CN201810635103.3A 2018-06-15 2018-06-15 Electronic expansion valve and air conditioner refrigerating system thereof Pending CN110608309A (en)

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CN201810635103.3A CN110608309A (en) 2018-06-15 2018-06-15 Electronic expansion valve and air conditioner refrigerating system thereof

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CN110608309A true CN110608309A (en) 2019-12-24

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005155691A (en) * 2003-11-21 2005-06-16 Daikin Ind Ltd Electric control valve
CN104180567A (en) * 2013-05-22 2014-12-03 浙江三花股份有限公司 Electronic expansion valve
CN105241131A (en) * 2014-06-17 2016-01-13 浙江盾安人工环境股份有限公司 Electronic expansion valve
CN105587906A (en) * 2014-10-21 2016-05-18 浙江三花股份有限公司 Electronic expansion valve
CN106481822A (en) * 2016-11-02 2017-03-08 珠海格力电器股份有限公司 Flow regulating valve, heat pump system and control method thereof
CN106705510A (en) * 2015-07-17 2017-05-24 浙江三花智能控制股份有限公司 Electronic expansion valve and valve seat component thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005155691A (en) * 2003-11-21 2005-06-16 Daikin Ind Ltd Electric control valve
CN104180567A (en) * 2013-05-22 2014-12-03 浙江三花股份有限公司 Electronic expansion valve
CN105241131A (en) * 2014-06-17 2016-01-13 浙江盾安人工环境股份有限公司 Electronic expansion valve
CN105587906A (en) * 2014-10-21 2016-05-18 浙江三花股份有限公司 Electronic expansion valve
CN106705510A (en) * 2015-07-17 2017-05-24 浙江三花智能控制股份有限公司 Electronic expansion valve and valve seat component thereof
CN106481822A (en) * 2016-11-02 2017-03-08 珠海格力电器股份有限公司 Flow regulating valve, heat pump system and control method thereof

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