CN220668392U - Electronic expansion valve and refrigeration equipment - Google Patents

Abstract

The utility model discloses an electronic expansion valve and refrigeration equipment, wherein the electronic expansion valve comprises a valve body, a pipe B, a pipe A and a rotating blade, wherein a refrigerant port, a valve port and a refrigerant cavity are arranged on the valve body, the refrigerant port and the valve port are both communicated with the refrigerant cavity, the pipe B is arranged at the refrigerant port, the pipe A is arranged on the valve body and communicated with the valve port, and the rotating blade is arranged in the pipe A and is used for enabling a refrigerant containing a gas bomb to rotate; according to the technical scheme, bubbles in the pipe A are dispersed, and noise generated by the electronic expansion valve is reduced.

Description

Electronic expansion valve and refrigeration equipment

Technical Field

The utility model relates to the technical field of refrigeration equipment, in particular to an electronic expansion valve and refrigeration equipment.

Background

The problem of electronic expansion valve noise is a concern in air conditioning systems all the time, but after the refrigerant containing bubbles in the electronic expansion valve in the prior art flows out from the valve port, unstable throttling noise is easy to generate.

Disclosure of Invention

The utility model mainly aims to provide an electronic expansion valve, which aims to break up bubbles and reduce noise of the electronic expansion valve.

In order to achieve the above object, the present utility model provides an electronic expansion valve, comprising:

the valve body is provided with a refrigerant port, a valve port and a refrigerant cavity, and the refrigerant port and the valve port are communicated with the refrigerant cavity;

the B pipe is arranged at the refrigerant port;

the pipe A is arranged on the valve body and communicated with the valve port; and

and the rotating blade is arranged in the pipe A and used for rotating the refrigerant containing the gas bomb.

Optionally, the rotating blade is helical.

Optionally, the thickness of the rotary vane increases and decreases in a direction away from the valve body.

Optionally, the upper end face of the rotary blade faces the valve body, the lower end face of the rotary blade faces away from the valve body, and the upper end face and the lower end face of the rotary blade are located on the same plane.

Optionally, the rotating vane is disposed proximate the valve body.

Optionally, the B pipe is welded and fixed at the refrigerant port.

Optionally, the B pipe includes a first media section and a second media section that are connected, the first media section is welded and fixed at the refrigerant port, and the diameter of the second media section is greater than the diameter of the first media section.

Optionally, the valve body includes:

the valve seat is provided with the valve port and the refrigerant port;

the nut is fixedly arranged on the valve seat, the refrigerant cavity is formed by enclosing the nut and the valve seat, the refrigerant cavity is communicated with the refrigerant port and the valve port, and the valve seat is provided with a threaded hole along the axial direction of the valve seat;

the valve needle assembly comprises a transmission section, a thread section and a plugging section which are sequentially arranged, and the thread section is in threaded connection with the threaded hole; and

the magnetic rotor is arranged on the valve seat and sleeved on the transmission section, and drives the valve needle to rotate so as to enable the blocking section to block or separate from the valve port.

Optionally, the plugging section is arranged in a conical shape towards one side of the refrigerant outlet.

The utility model also provides refrigeration equipment comprising the electronic expansion valve.

The electronic expansion valve comprises a valve body, a pipe B, a pipe A and a rotating blade, wherein a refrigerant port, a valve port and a refrigerant cavity are formed in the valve body, the refrigerant port and the valve port are communicated with the refrigerant cavity, the pipe B is arranged at the refrigerant port, the pipe A is arranged on the valve body and communicated with the valve port, the rotating blade is arranged in the pipe A and is used for enabling a refrigerant containing a gas bomb to rotate, so that the refrigerant containing the gas bomb is torn under the action of centrifugal force, the refrigerant in two states of gas and liquid are more uniformly mixed, bubbles of the refrigerant in the pipe A are reduced, and noise in the electronic expansion valve is further reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of one embodiment of an electronic expansion valve of the present utility model;

fig. 2 is a schematic view of the rotary blade of fig. 1.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				11	Valve seat	15	Abutting plate
111	Refrigerant port	16	Guide rail spring
				112	Valve port	17	Connecting sheet
113	Refrigerant cavity	20	B pipe
				12	Coil	30	A pipe
13	Valve needle assembly	40	Rotary blade
				14	Nut

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, "and/or" throughout this document includes three schemes, taking a and/or B as an example, including a technical scheme, a technical scheme B, and a technical scheme that both a and B satisfy; in addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model proposes an electronic expansion valve comprising:

the valve body is provided with a refrigerant port 111, a valve port 112 and a refrigerant cavity 113, wherein the refrigerant port 111 and the valve port 112 are communicated with the refrigerant cavity 113;

a B pipe 20, wherein the B pipe 20 is installed at the refrigerant port 111;

an a-tube 30, the a-tube 30 being mounted to the valve body and communicating with the valve port 112; and

and a rotary blade 40, wherein the rotary blade 40 is installed in the A pipe 30, and is used for rotating the refrigerant containing the air spring.

The electronic expansion valve in the technical scheme of the utility model comprises a valve body, a pipe B20, a pipe A30 and a rotary blade 40, wherein a refrigerant port 111, a valve port 112 and a refrigerant cavity 113 are arranged on the valve body, the refrigerant port 111 and the valve port 112 are communicated with the refrigerant cavity 113, the pipe B20 is arranged at the refrigerant port 111, the pipe A30 is arranged on the valve body, the pipe A30 is communicated with the valve port 112, and the rotary blade 40 is arranged in the pipe A30 and is used for enabling a refrigerant containing a gas bomb to rotate, so that the refrigerant containing the gas bomb is torn under the action of centrifugal force, the refrigerant in two states of gas and liquid is more uniformly mixed, bubbles of the refrigerant in the pipe A30 are reduced, and noise in the electronic expansion valve is further reduced.

During refrigeration, the a pipe 30 is used as a media outlet, the valve port 112 is used as a media outlet, the B pipe 20 is used as a media inlet, and the refrigerant port 111 is used as a media inlet; in heating, the pipe A30 is used as a medium inlet, the valve port 112 is used as a medium inlet, the pipe B20 is used as a medium outlet, and the refrigerant port 111 is used as a medium outlet.

In this embodiment, the rotating blades 40 are spiral, that is, the rotating blades 40 are spiral, which is integrally provided, and compared with the mode of splicing by installing a plurality of rotating blades 40, the technical scheme of the application reduces the installation process of the rotating blades 40 and reduces the installation difficulty.

Meanwhile, the integrally arranged spiral rotary blade 40 is convenient for processing and production, and only two ends of one square blade are required to be rotated in different directions respectively, so that the processing technology is simple, and the processing cost of the rotary blade 40 is reduced.

Further, the thickness of the rotary vane 40 is increased and then reduced along the direction away from the valve body, so that the outer surface of the rotary vane 40 is arc-shaped, thereby facilitating the flow guiding effect on the refrigerant and enhancing the structural strength of the rotary vane 40.

Specifically, the upper end surface of the rotary vane 40 is disposed towards the valve body, the lower end surface of the rotary vane 40 is disposed away from the valve body, and the upper end surface and the lower end surface of the rotary vane 40 are located on the same plane. In this way, the refrigerant containing the air bomb rotates 180 degrees under the action of the rotating blade 40, so that the refrigerant containing the air bomb is more fully mixed, bubbles of the refrigerant in the pipe A30 are greatly reduced, and noise in the electronic expansion valve is further reduced.

In this embodiment, the rotary vane 40 is disposed adjacent to the valve body; as can be appreciated, the refrigerant ejected from the valve port 112 gets closer to the valve port 112, the more refrigerant containing the gas bomb gets, and the effect exerted by the rotating vane 40 is more remarkable at this time, so that the refrigerant gas and liquid can be mixed more fully and uniformly, and bubbles of the refrigerant in the a pipe 30 are reduced, and noise in the electronic expansion valve is reduced.

In this embodiment, the B pipe 20 is welded and fixed to the refrigerant port 111. It will be appreciated that refrigerant enters the refrigerant chamber 113 through the B-tube 20 and then exits through the valve port 112 and the A-tube 30.

Further, the B pipe 20 includes a first media section and a second media section connected to each other, the first media section is welded and fixed at the refrigerant port 111, and the diameter of the second media section is larger than that of the first media section. The first media segment is used for adapting the size setting of the refrigerant port 111, and further, the diameter of the second media segment is smaller than that of the first media segment, so that the pressure of the refrigerant entering the refrigerant cavity 113 is increased, and meanwhile, the generation of vortex is reduced, and further, the generation of noise is reduced.

Further, compared with the way of right-angle transition between the first media segment and the second media segment, the inclined plane transition between the first media segment and the second media segment reduces the flow resistance of the refrigerant flowing into the first media segment from the second media segment; of course, in other embodiments, the first media segment and the second media segment may transition through an arc.

In this embodiment, the valve body comprises a valve seat 11, a nut 14, a valve needle assembly 13 and a magnetic rotor; the valve seat 11 is provided with the valve port 112 and the refrigerant port 111; the nut 14 is fixedly mounted on the valve seat 11, the nut 14 and the valve seat 11 are enclosed to form the refrigerant cavity 113, the refrigerant cavity 113 is communicated with the refrigerant port 111 and the valve port 112, and the valve seat 11 is provided with a threaded hole along the axial direction of the valve seat 11; the valve needle assembly 13 comprises a transmission section, a thread section and a plugging section which are sequentially arranged, and the thread section is in threaded connection with the threaded hole; the magnetic rotor is mounted on the valve seat 11 and sleeved on the transmission section, and drives the valve needle to rotate so as to enable the blocking section to block or separate from the valve port 112.

In one embodiment, the valve seat 11 may be used to mount and carry the nut 14, the valve needle assembly 13, and the magnetic rotor components so that the electronic expansion valve components may be assembled to form a single unit. The valve seat 11 may have a cylindrical structure having openings at both ends, one of which may be formed as the valve port 112, and the other of which is covered by the nut 14. The valve seat 11 may have a circular shape, so that the valve seat is regular in shape and easy to manufacture. Of course, the present application is not limited thereto, and in other embodiments, the valve seat 11 may have a square structure or other shape structure. The nut 14 may be used to form a refrigerant cavity 113 around the valve seat 11, and at the same time, the threaded hole on the nut 14 may be coaxial with the valve port 112 on the valve seat 11, so that the valve needle assembly 13 can be accurately inserted into the valve port 112. The nut 14 may be disposed entirely outside the valve seat 11, or may be partially inserted into an opening formed in the valve seat 11 at an end thereof remote from the valve port 112. This increases the contact area between the nut 14 and the valve seat 11, which is advantageous in improving the stability of the connection between the two and the seal.

Further, the nut 14 may be further sleeved with a connecting piece 17, and the connecting piece 17 may cover a connection portion between the nut 14 and the valve seat 11, so as to further improve tightness of connection between the nut 14 and the valve seat 11. The connecting piece 17 and the nut 14 can be embedded into the outer peripheral surface of the nut 14 to realize the clamping and fixing of the two, and can be fixed with the nut 14 by welding to ensure better connection stability of the two. In addition, the shape of the nut 14 may be a circular structure, so that the shape is regular and is convenient for processing and forming, and meanwhile, the volume of the nut is relatively small, which is beneficial to reducing the occupation of space. The threaded hole in the nut 14 may be partially a threaded hole section, in which case the threaded hole may be formed at the upper, middle or lower end of the threaded hole. Of course, the upper, middle or lower ends of the threaded holes may be formed as threaded hole segments. One end of the needle assembly 13 may be threaded into and in threaded engagement with a threaded bore. The valve needle assembly 13 extending into the refrigerant cavity 113 from the threaded hole can be inserted into the valve port 112 to completely or partially close the valve port 112, when the valve port 112 is completely closed, the valve needle assembly 13 is closely attached to the valve port 112 so that the refrigerant cannot pass through, and when the valve port 112 is partially closed, a gap is formed between the valve needle assembly 13 and the valve port 112 so that the refrigerant can pass through in a small amount; and may also be disengaged from within the valve port 112 to fully open the valve port 112. The magnetic rotor may be used to provide power so that the needle assembly 13 may rotate relative to the nut 14.

Further, the plugging section is tapered toward the side of the valve port 112. It can be appreciated that the opening of the valve port 112 is smaller, and the plugging section is arranged in a tapered shape, so that the opening and closing of the valve port 112 can be conveniently adjusted, and the tapered plugging section can gradually extend into the valve port 112, so that the effect of adjusting the valve port 112 is achieved.

Further, the plugging section is made of flexible materials, so that the plugging section can be sealed and plugged at the valve port 112 when the plugging section is completely abutted against the valve port 112, and further the effect of stopping liquid is achieved; of course, in other embodiments, a layer of flexible material may be disposed on the outer wall of the plugging section, or a layer of flexible material may be disposed on the hole wall of the valve port 112 to seal the plugging section and the valve port 112, where the flexible material may be silica gel, rubber, etc., and the silica gel rubber, etc. has good wear resistance and low cost, so as to reduce the manufacturing cost of the electronic expansion valve.

Specifically, the outer side of the magnetic rotor may be provided with a coil 12 member, and the magnetic rotor may sense the electromagnetic force rotation motion of the coil 12 member. The valve needle assembly 13 and the magnetic rotor have a connection relationship to synchronously rotate, and the lifting movement along the direction approaching or separating from the valve port 112 is realized under the action of the threaded cooperation of the nut 14 section on the valve needle assembly 13 and the mounting hole on the nut 14, so that the insertion and separation of the valve port 112 are realized. The magnetic rotor can be of a cylindrical structure with one end open, so that the shape of the magnetic rotor is matched with the rotating track, and the possibility of interference in the moving process can be reduced.

When the electronic expansion valve of the technical scheme of the utility model is used, the magnetic rotor can sense the electromagnetic force rotation motion of the coil 12 part and drive the valve needle assembly 13 to rotate relative to the nut 14. Because the valve needle assembly 13 is in threaded engagement with the nut 14, the valve needle assembly 13 is more axially slidable during rotation, i.e., is lifted and lowered within the mounting bore along the valve port 112 near or away from the valve seat 11. Such that the valve needle assembly 13 may be inserted into the valve port 112 or removed from the valve port 112 to provide control of the closing and opening of the electronic expansion valve.

In an embodiment, the valve needle assembly 13 comprises a valve needle integrally arranged, and the transmission section, the thread section and the blocking section are all arranged on the valve needle, so that the valve needle assembly 13 is simple in structure, the number of parts is reduced, and the manufacturing cost of the electronic expansion valve is reduced.

It can be appreciated that if the valve needle structure of the valve needle assembly 13 is integrally provided, the diameters of the transmission section, the thread section and the blocking section are respectively R1, R2 and R3, and R1 > R2 > R3, so that the blocking section of the valve needle can be directly inserted downwards and sequentially pass through the threaded hole and the refrigerant cavity 113 when the valve needle is installed, and the electronic expansion valve is conveniently installed and disassembled.

In another embodiment, the valve needle assembly 13 comprises a valve needle and a screw rod, the valve needle is fixed on the screw rod, the magnetic rotor drives the screw rod to rotate, the screw rod drives the valve needle to rotate, the transmission section and the thread section are arranged on the screw rod, the plugging section is arranged on the valve needle, and the valve needle and the screw rod are arranged, so that the installation and the subsequent maintenance of the valve needle assembly 13 are facilitated, and if the valve needle assembly 13 needs to be replaced, only corresponding parts need to be replaced, and the subsequent maintenance cost is further reduced.

The operation principle of the electronic expansion valve is as follows: the electronic expansion valve generates a magnetic field by the coil 12 through current and acts on the valve needle assembly 13 to drive the valve needle assembly 13 to rotate, and when the positive and negative power supply voltages and signals of the coil 12 are changed, the electronic expansion valve is opened and closed or the opening and closing gap is changed, so that the flow of the refrigerant, the refrigerating capacity and the heat in the system are controlled. The smaller the valve core is opened, the smaller the refrigerant flow.

The electronic expansion valve has the function of throttling in the refrigerant system, namely, adjusting the flow rate of the high-pressure liquid refrigerant entering the evaporator through the liquid pipeline, and maintaining the pressure difference between the high-pressure side and the low-pressure side of the system so as to ensure that the refrigerant can evaporate at a desired low pressure in the evaporator and can be condensed in the condenser under a high-pressure condition.

The electronic expansion valve only needs a few seconds from a fully closed state to a fully opened state, has high reaction and action speed, does not have static superheat degree phenomenon, can be manually set in opening and closing characteristics and speed, and is particularly suitable for heat pump units with severe fluctuation of working conditions. Thereby be convenient for to refrigerant flow's fast switch over, improved refrigeration plant's work efficiency, and its stable performance, and then improved refrigeration plant's life.

Further, a guide rail is arranged on the outer side wall of the nut 14, the guide rail is spirally extended in the direction that the valve needle is close to the valve port 112, the electronic expansion valve further comprises a sliding piece, and part of the sliding piece is embedded in the guide rail and can slide along the extending direction of the guide rail; the magnetic rotor further comprises an abutting plate 15, the abutting plate 15 is connected to the limiting plate, and when the magnetic rotor drives the valve needle to rotate relative to the nut 14, the abutting plate 15 abuts against the driving sliding piece.

It will be appreciated that the slider may be driven by abutment of the abutment plate 15 during rotation of the magnetic rotor, and that the slider may have an upper limit and a lower limit in the lifting process along the set rail due to the upper limit and the lower limit of the travel of the rail. At this time, the control of the lifting stroke of the valve needle driven by the magnetic rotor is correspondingly realized.

In one embodiment, the electronic expansion valve further comprises a guide rail spring 16, wherein the guide rail spring 16 is sleeved on the nut 14 and forms a guide rail with the nut 14; the sliding part comprises a ring body and an extension rod, wherein the ring body is spirally arranged and positioned in the guide rail, and the extension rod is connected to the ring body and can be driven by the abutting plate 15.

It can be understood that the guide rail spring 16 and the nut 14 are matched to form a guide rail, so that the guide rail does not need to be directly formed on the outer peripheral surface of the nut 14, and only the guide rail spring 16 is sleeved on the outer peripheral wall of the nut 14, or the guide rail spring 16 is fixed on the outer peripheral wall of the nut 14, thereby greatly simplifying the processing technology of the guide rail. The rail spring 16 and the nut 14 may be fastened and fixed, that is, a fastening slot for inserting one end of the rail spring 16 may be provided on the nut 14, and the rail spring 16 may be directly welded and fixed with the nut 14. In other embodiments, the guide rail may be formed by directly forming a spiral groove in the nut 14.

The utility model also provides a refrigeration device, which comprises an electronic expansion valve, and the specific structure of the electronic expansion valve refers to the embodiment, and because the refrigeration device adopts all the technical schemes of all the embodiments, the refrigeration device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. An electronic expansion valve, comprising:

the valve body is provided with a refrigerant port, a valve port and a refrigerant cavity, and the refrigerant port and the valve port are communicated with the refrigerant cavity;

the B pipe is arranged at the refrigerant port;

the pipe A is arranged on the valve body and communicated with the valve port; and

and the rotating blade is arranged in the pipe A and used for rotating the refrigerant containing the gas bomb.

2. The electronic expansion valve of claim 1, wherein the rotating vane is helical.

3. The electronic expansion valve of claim 1, wherein the thickness of the rotary vane increases and decreases in a direction away from the valve body.

4. The electronic expansion valve of claim 1, wherein an upper end surface of the rotary vane is disposed toward the valve body, a lower end surface of the rotary vane is disposed away from the valve body, and the upper end surface and the lower end surface of the rotary vane are in the same plane.

5. The electronic expansion valve of claim 1, wherein the rotating vane is disposed proximate the valve body.

6. The electronic expansion valve of claim 1, wherein said B-tube is welded to said refrigerant port.

7. The electronic expansion valve of claim 6, wherein said B-tube comprises a first media segment and a second media segment connected, said first media segment being welded to said refrigerant port, said second media segment having a diameter greater than a diameter of said first media segment.

8. The electronic expansion valve of claim 1, wherein the valve body comprises:

the valve seat is provided with the valve port and the refrigerant port;

the nut is fixedly arranged on the valve seat, the refrigerant cavity is formed by surrounding the nut and the valve seat, the refrigerant cavity is communicated with the refrigerant port and the valve port, and the valve seat (11) is provided with a threaded hole along the axial direction of the valve seat;

the valve needle assembly comprises a transmission section, a thread section and a plugging section which are sequentially arranged, and the thread section is in threaded connection with the threaded hole; and

the magnetic rotor is arranged on the valve seat and sleeved on the transmission section, and drives the valve needle to rotate so as to enable the blocking section to block or separate from the valve port.

9. The electronic expansion valve according to claim 8, wherein the plugging section is tapered toward the refrigerant outlet side.

10. A refrigeration device comprising an electronic expansion valve according to any one of claims 1 to 9.