CN110375081B

CN110375081B - Valve device and valve block thereof

Info

Publication number: CN110375081B
Application number: CN201810332388.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2018-04-13
Filing date: 2018-04-13
Publication date: 2021-02-02
Anticipated expiration: 2038-04-13
Also published as: CN110375081A

Abstract

The invention discloses a valve device and a valve block thereof, wherein the valve block can rotate relative to a valve seat component of the valve device; the valve block comprises a plate-shaped part, an upper body part positioned on the top surface of the plate-shaped part and a lower body part positioned on the bottom surface of the plate-shaped part, and the plate-shaped part, the upper body part and the lower body part are fixedly arranged into a whole; the plate-shaped portion has a plurality of orifices that are not identical in bore diameter arranged circumferentially around a center of rotation of the valve block; the upper body part is provided with a through cavity, and each throttle hole is directly communicated with the through cavity; the lower body part is provided with a plurality of communication holes corresponding to a plurality of throttle hole positions one by one, and the size of each communication hole is larger than that of the throttle hole at the corresponding position; the upper body and the lower body are integrally formed at the plate-shaped portion by injection molding. The valve block is advantageous in terms of its construction and at the same time ensures the accuracy of the orifice.

Description

Valve device and valve block thereof

Technical Field

The invention relates to the technical field of refrigeration, in particular to a valve device and a valve block thereof.

Background

For a small refrigeration system, capillary throttling is mostly adopted, and the capillary does not have a flow regulation function, so that the refrigeration system cannot achieve the optimal operation condition under different environmental conditions, and the influence on the energy efficiency is large.

In order to meet the development requirements of small refrigeration systems, the electric switching valve is improved to adjust the flow rate within a small deviation range, and orifices for adjusting the flow rate are usually arranged on a valve block.

The valve block is usually made of engineering plastics, the orifice hole is small in diameter and is not suitable for direct injection molding, a machining mode is needed, and in actual use, the valve block can rotate relative to the valve seat, so that fillers such as glass fibers, carbon fibers and graphite need to be added into the engineering plastics for ensuring the low friction coefficient, low abrasion, self-lubricating and other performances of the valve block, if the materials contain the fillers such as the carbon fibers, filiform fiber residues can be contained in the machined orifice hole, and meanwhile burrs generated at an orifice port due to the friction of the valve block relative to the valve seat are not easy to remove, so that the precision of the orifice is influenced, and the flow regulation precision of the valve is influenced.

Therefore, how to improve the structure of the valve block to facilitate the machining of the orifice while ensuring the precision of the orifice is a technical problem that needs to be solved currently by those skilled in the art.

Disclosure of Invention

The invention aims to provide a valve device and a valve block thereof, wherein the valve block is designed to facilitate the processing of an orifice and ensure the precision of the orifice.

In order to solve the technical problem, the invention provides a valve block for a valve device, wherein the valve block can rotate relative to a valve seat component of the valve device; the valve block comprises a plate-shaped part, an upper body part and a lower body part, wherein the upper body part and the lower body part are integrally formed on the plate-shaped part in an injection molding mode;

the plate-shaped portion has a plurality of orifices that are not identical in bore diameter arranged circumferentially around a center of rotation of the valve block; the upper body part is provided with a through cavity, and each throttle hole is directly communicated with the through cavity;

the lower body portion has a plurality of communication holes corresponding one-to-one to a plurality of the orifice positions, and each of the communication holes has a size larger than the orifice at the corresponding position.

The valve block of the valve device comprises a plate-shaped part, an upper body part and a lower body part, wherein the upper body part and the lower body part are integrally formed on the plate-shaped part in an injection molding mode; the upper body part and the lower body part which are formed by injection molding of engineering plastics are arranged on the top surface and the bottom surface of the plate-shaped part and used for ensuring the wear resistance of the valve block, the through cavity of the upper body part communicated with the orifice and the communication hole of the lower body part communicated with the orifice can be arranged in a large size due to the orifice formed in the plate-shaped part, the precision of the orifice of the valve block which is influenced by residue formed in the orifice can be avoided, meanwhile, the precision of the orifice is not easily influenced by burrs generated by the friction of the valve block relative to the valve seat in the communication hole, and the precision of the orifice of the valve block can be.

Drawings

FIG. 1 is a schematic cross-sectional view of one embodiment of a valve assembly according to the present invention;

FIG. 2 is an angled schematic view of the valve block shown in FIG. 1 with the filter element attached;

FIG. 3 is a schematic view of an alternate angle of the valve block shown in FIG. 1 with the filter element attached;

FIG. 4 is a top view of the valve block shown in FIG. 1 fitted with a filter element;

FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is a schematic structural view of a plate-like portion of a valve block in an exemplary embodiment;

FIG. 7 is a schematic illustration of the construction of the valve seat member shown in FIG. 1;

FIG. 8 is a top view of the valve seat member of FIG. 7;

fig. 9 is a schematic cross-sectional view taken along the direction B-B in fig. 8.

Wherein, the one-to-one correspondence between component names and reference numbers in fig. 1 to 9 is as follows:

rotor part 10, magnet 11, shaft 12;

valve seat member 20, support seat 21, valve seat body 22, inlet 221, outlet 222, valve port 223, flow port 224, shaft hole 225;

the valve block 30, the plate-shaped portion 31, the orifice 311, the port 312, the upper body portion 32, the through cavity 321, the lower body portion 33, the communication hole 331, the sleeve portion 34, and the key groove 35;

a filter member 40;

the housing 60, the inlet tube 70, the outlet tube 80, the valve chamber R1, and the receiving chamber R2.

Detailed Description

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

For ease of understanding and brevity of description, the following description is provided in conjunction with the valve apparatus and valve block thereof, and the advantageous effects will not be repeated.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a valve device according to an embodiment of the present invention.

In this embodiment the valve arrangement comprises a drive member and a valve seat member 20, wherein the valve seat member 20 has an inlet 221 and an outlet 222, the inlet 221 of which communicates with a valve chamber R1 of the valve arrangement.

The valve assembly further includes a valve block 30 supported by the valve seat member 20, with a bottom surface of the valve block 30 abutting a top surface of the valve seat member 20.

The valve block 30 has a plurality of orifices 311 arranged circumferentially about the rotational center thereof, wherein the orifices 311 do not all have the same hole diameter in the circumferential direction, and the orifices 311 communicate with the valve chamber R1.

The driving member can drive the valve block 30 to rotate relative to the valve seat member 20 so as to make the orifice 311 communicate with the outlet 222, thereby communicating the inlet 221 with the outlet 222, or make the part of the valve block 30 where the orifice 311 is not provided close the outlet 222, thereby isolating the inlet 221 from the outlet 222; hereinafter, for convenience of description, a portion of the valve block 30 where the orifice 311 is not provided is referred to as a stopper portion.

It will be appreciated that the distance of the orifice 311 from the center of rotation of the valve block 30 should be such that the orifice 311 communicates with the outlet 222 when the valve block 30 is rotated.

The valve device realizes the adjustment of the refrigerant flow rate by utilizing the rotation of the valve block 30 with the orifice 311 relative to the valve seat member 20, wherein, the orifice 311 of the valve block 30 is communicated with the valve cavity R1, the inlet 221 of the valve seat member 20 is also communicated with the valve cavity R1, the orifice 311 is communicated with the outlet 222 of the valve seat member 20 by driving the valve block 30 to rotate through the driving part, so that the inlet 221 is communicated with the outlet 222, or the blocking part closes the outlet 222, so that the inlet 221 is blocked from the outlet 222, thus, the communication or the blocking of the inlet 221 and the outlet 222 is realized through the rotation of the valve block 30 relative to the valve seat member 20, the valve device has the function of complete closing, and the situation of clamping failure can not occur in the complete closing.

Further, the diameters of the orifices 311 are not completely uniform in the circumferential direction, and thus the refrigerant flow rate can be adjusted by rotating the valve block 30 to communicate different orifices 311 with the outlet 222.

The structural design of the valve device can make the aperture of the throttling hole 311 smaller so as to meet the requirement of flow control precision of a small refrigeration system such as a refrigerator, and therefore, the processing precision of the throttling hole 311 of the valve block 30 is a key factor influencing the flow regulation precision of the valve device.

The specific structure of the valve block 30 of the present invention will be described in detail.

Referring to fig. 2 to 5 together, fig. 2 is an angular structure view of the valve block with the filter assembly shown in fig. 1; FIG. 3 is a schematic view of an alternate angle of the valve block shown in FIG. 1 with the filter element attached; FIG. 4 is a top view of the valve block shown in FIG. 1 fitted with a filter element; fig. 5 is a schematic sectional view taken along the line a-a in fig. 4.

In this embodiment, the valve block 30 includes a plate 31, an upper body 32 on the top of the plate 31, and a lower body 33 on the bottom of the plate 31, which are integrally fixed.

It should be noted that the terms of orientation, upper, lower, top, bottom, etc. used herein are defined by the components shown in fig. 1 and the positional relationship between the components, and are only used for the sake of clarity and convenience of the technical solution, and it should be understood that the terms of orientation used herein should not limit the scope of protection of this patent.

Wherein the plate-like portion 31 has a plurality of orifices 311 which are not identical in bore diameter and are circumferentially arranged around the rotational center of the valve block 30; the upper body 32 has a through cavity 321 in the middle thereof, and each orifice 311 is directly communicated with the through cavity 321; the lower body 33 has a plurality of communication holes 331 corresponding to the positions of the plurality of orifices 311 one by one, and the size of each communication hole 331 is larger than the corresponding position of the orifice 311.

Thus, the plate 31, the upper body 32 and the lower body 33 can be made of different materials according to the structural requirements, for example, the plate 31 is made of a cutting material for easy processing, and the upper body 32 and the lower body 33 are both made of plastic by injection molding.

As designed above, the flat surface of the valve block 30 that abuts the top surface of the valve seat member 20 is the bottom surface of the lower body portion 33, and the through cavity 321 of the upper body portion 32 directly communicates with the valve cavity R1; it is understood that in this embodiment, the orifice 311 provided in the plate-like portion 31 communicates with the valve chamber R1 through the through-chamber 321, and can communicate with the outlet 222 through the communication hole 331 at the corresponding position.

The valve block 30 provided in this embodiment is made of two materials, wherein the orifice 311 is opened in the plate-shaped portion 31, the plate-shaped portion 31 is made of a cutting material which is easy to machine, so that machining of the orifice 311 having a very small hole diameter (typically less than 0.5mm) is facilitated compared to engineering plastics, the upper body portion 32 and the lower body portion 33 are integrally formed in the plate-shaped portion 31 by injection molding to ensure wear resistance of the valve block 30, and the orifice 311 is formed in the plate-shaped portion 31, so that the size of the through cavity 321 of the upper body portion 32 communicating with the orifice 311 and the size of the communication hole 331 of the lower body portion 33 communicating with the orifice 311 can be set large, and residue in the orifice 311 or in a port can be avoided, thereby ensuring machining accuracy of the orifice 311 of the valve block 30 and improving flow rate adjustment accuracy of the valve device.

In this embodiment, the valve device is further provided with a filtering component 40 for filtering the refrigerant flowing through the orifice 311 of the valve block 30, so as to prevent the orifice 311 from being blocked by foreign matters, which affects the usability of the product.

The filtering capacity of the filtering member 40 can be determined by the aperture of the orifice 311 in combination with other requirements, and the aperture of each orifice 311 is in the range of 0.1mm to 0.3mm, as is known from the specific aperture value of each orifice 311, so that the filtering member 40 can filter at least impurities and foreign substances larger than 0.1mm when applied. In a specific arrangement, the mesh number of the filter element 40 is greater than 100 meshes to meet basic use requirements.

Specifically, the filter member 40 may be formed by sintering tin bronze balls or stainless steel balls, or may be made of a multi-layer stainless steel mesh.

It is understood that the filter unit 40 should be disposed at an upstream position of the orifice 311 of the valve block 30 in terms of the flow direction of the refrigerant; in a specific embodiment, the filter member 40 is inserted into the through cavity 321 of the upper body 32 of the valve block 30, and the filter member 40 is spaced from the top surface of the plate 31 by a predetermined distance, so that the filter member 40, the plate 31 and the upper body 32 surround to form a receiving cavity R2, and the refrigerant flowing into the valve cavity R1 is filtered by the filter member 40, flows into the receiving cavity R2, and then flows out through the orifice 311 and the corresponding communication hole 331.

In practice, the predetermined distance between the filter member 40 and the top surface of the plate-shaped portion 31 may be set as desired.

In a specific embodiment, the plate 31 has a central through hole communicating with the through cavity 321, and the valve block 30 further includes a sleeve portion 34 fixedly inserted into the central through hole of the plate 31, wherein the sleeve portion 34 protrudes from a top surface of the plate 31 to support the filter element 40, and also facilitates fixing a relative position between the filter element 40 and the valve block 30. It is apparent that the height at which the sleeve portion 34 projects from the top surface of the plate-like portion 31 is the distance between the filter member 40 and the top surface of the plate-like portion 31, i.e., the aforementioned predetermined distance.

In a specific embodiment, the upper body portion 32, the lower body portion 33 and the sleeve portion 34 are integrally formed on the plate portion 31 by injection molding, which may be understood as integrally injection molding the upper body portion 32, the lower body portion 33 and the sleeve portion 34 on the basis of the plate portion 31.

Referring also to fig. 6, fig. 6 is a schematic view showing the structure of the plate-like portion of the valve block in the embodiment, in which the orifice is not machined.

Specifically, the plurality of through holes 312 are formed in the outer periphery of the plate-shaped portion 31, and the upper body portion 32 and the lower body portion 33 are integrally formed at the transition portion of the through holes 312 by injection molding, so that the fixing reliability of the upper body portion 32, the lower body portion 33, and the plate-shaped portion 31 can be improved.

More specifically, the plurality of through openings 312 are each arranged along the outer periphery of the plate-like portion 31.

In actual installation, the through hole 312 may be opened at another position, for example, the inner periphery, of the plate-like portion 31 as long as it does not interfere with the orifice 311.

In a specific scheme, the plate-shaped portion 31 may be made of other metal materials such as brass or aluminum, and both are cutting materials convenient for machining, which is beneficial to improving the machining manufacturability of the plate-shaped portion 31. Of course, in practice, the plate-shaped portion 31 may be made of other cutting materials for easy machining, and it is understood that a free-cutting material is preferable to improve the machining manufacturability.

The upper body 32 and the lower body 33 may be PPS engineering plastic or PEEK engineering plastic, which can ensure a low coefficient of friction and low wear of the valve block 30.

The valve block 30 in this embodiment may be made by: the body of the plate-shaped part 31 is manufactured by machining, and in order to avoid the influence on the throttling hole 311 during subsequent injection molding, the body of the plate-shaped part 31 is of a structure without the throttling hole 311; the plate-shaped portion 31 is integrally formed with the upper body portion 32, the lower body portion 33 and the sleeve portion 34 by injection molding, and it is obvious that the through cavity 321 and the communication hole 331 are formed during injection molding; finally, the orifice 311 is formed in the body of the plate-like portion 31.

In a specific embodiment, the orifices 311 of the valve block 30 are arranged in an arc shape around the rotation center thereof, so that the portion between the two orifices 311 located at the outer end forms the blocking portion of the valve block 30.

Specifically, the aperture of each throttle hole 311 may be sequentially increased or decreased in the circumferential direction, and the angles between two adjacent throttle holes 311 are equal, that is, the plurality of throttle holes 311 are arranged uniformly over the arc section in which the throttle holes 311 are arranged. By such a design, the valve block 30 can adjust the flow rate once when rotating the same angle, thereby facilitating the operation of the valve device.

Of course, the hole diameter of each throttle hole 311 may be irregular when actually arranged.

The communication hole 331 of the lower body 33 corresponding to the orifice 311 is designed to communicate the orifice 311 with the outlet 222, and is larger than the orifice 311, thereby improving the injection workability, and preventing the orifice 311 from being clogged by abrasion due to friction with the valve seat member 20 during rotation of the valve block 30, and ensuring the reliability of the flow rate control of the product.

The communication holes 331 of the lower body 33 may be uniformly sized for easy processing.

Referring also to fig. 7 to 9, fig. 7 is a schematic view of the valve seat member shown in fig. 1; FIG. 8 is a top view of the valve seat member of FIG. 7; fig. 9 is a schematic cross-sectional view taken along the direction B-B in fig. 8.

In this embodiment, an inlet 221 and an outlet 222 are formed in the bottom of the valve seat member 20 and are connected to the inlet pipe 70 and the outlet pipe 80, respectively.

A valve port 223 communicating with the outlet port 222 is opened in the top of the valve seat member 20, a flow port 224 communicating with the inlet port 221 is opened in the side of the valve seat member 20, and the flow port 224 communicates with the valve chamber R1.

It will be appreciated that the inlet 221 does not communicate directly with the orifice 311 of the valve block 30.

It should be understood that, when the valve seat member 20 is arranged as described above, the position of the orifice 311 of the valve block 30 should correspond to the position of the valve port 223, so that the orifice 311 can communicate with the valve port 223 and then with the outlet 222 during the rotation of the valve block 30.

Thus, the refrigerant flows in from the inlet pipe 70, flows into the valve chamber R1 through the inlet 221 and the flow opening 224 of the valve seat member 20, flows into the orifice 311 through the filter member 40, and flows out from the outlet pipe 80 through the valve opening 223 and the outlet 222.

In a specific scheme, the valve seat component 20 comprises a supporting seat 21 and a valve seat body 22 fixedly arranged on the supporting seat, and the supporting seat 21 and the valve seat body 22 are arranged separately and can be fixed in a welding mode, so that the valve seat component is simple and reliable.

The valve port 223 and the communication port 224 are both opened in the valve seat body 22, that is, the valve block 30 is directly attached to the valve seat body 22 and rotates relative to the valve seat body 22.

Specifically, the inlet 221 and the outlet 222 may be both provided in the valve seat body 22, and the support base 21 may be provided with a through hole adapted to the valve seat body 22, so that the valve seat body 22 is fixedly inserted into the through hole of the support base 21.

Of course, the inlet 221 and the outlet 222 may be both provided on the support base 21, and the valve seat body 22 may be fixed on the top surface of the support base 21 so that the valve port 223 and the flow port 224 correspond to the positions of the outlet 222 and the inlet 221, respectively.

Of course, the inlet 221 and the outlet 222 may be partially provided on the valve seat body 22 and partially provided on the support seat 21.

Further, the valve seat member 20 may be formed as an integral structure, and a separate structure is relatively easy to manufacture and low in cost.

As shown in fig. 1, the valve block 30 is driven to rotate by a motor in this embodiment. The motor comprises in particular a rotor part 10 and a coil part.

The rotor component 10 includes a magnet 11 and a rotating shaft 12 inserted into the magnet 11, the lower end of the rotating shaft 12 is inserted into the filtering component 40 and the valve block 30 in sequence, and during operation, the rotor component 10 is driven to rotate by the external coil component, so as to drive the valve block 30 to rotate relative to the valve seat body 22.

In order to make the rotor component 10 rotate together with the valve block 30, the valve block 30 may be fixed relative to the rotating shaft 12, for example, the valve block 30 may be in interference fit with the rotating shaft 12.

Of course, the valve block 30 and the magnet 11 may be fixed to each other, for example, a protruding key portion (not shown) may be provided at the lower end of the magnet 11, a key groove 35 that fits the key portion may be provided on the valve block 30, and the magnet 11 and the valve block 30 may be fixed to each other by engaging and fixing the key portion of the magnet 11 with the key groove 35.

The key portion of the magnet 11 is fitted into the key groove 35, and functions to press the valve block 30 against the valve seat body 22 to some extent, so that the valve block 30 and the valve seat body 22 can be securely bonded to each other, and the refrigerant can be prevented from flowing into the bonded portion between the two.

The valve device further comprises a housing 60 which is sleeved over the magnet 11, the bottom of the housing 60 being fixed to the valve seat member 20, in particular in this embodiment the bottom of the housing 60 is fixed to the abutment 21 of the valve seat member 20.

The valve device and the valve block thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A valve block for a valve device, the valve block (30) being rotatable relative to a valve seat part (20) of the valve device; characterized in that the valve block (30) comprises a plate-shaped portion (31), an upper body portion (32) and a lower body portion (33), the upper body portion (32) and the lower body portion (33) being integrally formed on the plate-shaped portion (31) by injection molding; the plate-shaped portion (31) is made of a different material from the upper body portion (32) and the lower body portion (33), the plate-shaped portion (31) is made of a metal material, and the upper body portion (32) and the lower body portion (33) are made of an engineering plastic;

the plate-shaped portion (31) has a plurality of orifices (311) of not identical hole diameter circumferentially arranged around the rotation center of the valve block (30), the orifices (311) being formed by cutting; the upper body (32) has a through cavity (321), and each orifice (311) directly communicates with the through cavity (321);

the lower body (33) has a plurality of communication holes (331) corresponding to the positions of the plurality of orifices (311) one by one, and the size of each communication hole (331) is larger than that of the corresponding orifice (311).

2. The valve block according to claim 1, wherein the plate-shaped portion (31) has a central through hole communicating with the through cavity (321), the valve block (30) further comprising a sleeve portion (34) fixedly fitted in the central through hole, the sleeve portion (34) protruding from a top surface of the plate-shaped portion (31); the sleeve portion (34) is integrally formed with the upper body portion (32) and the lower body portion (33), and is formed on the plate-shaped portion (31) by injection molding.

3. Valve block according to claim 1, characterized in that the plate-shaped portion (31) has a plurality of through openings (312), the upper body (32) and the lower body (33) being formed in one piece by injection moulding at the transition of the through openings (312).

4. Valve block according to claim 3, characterized in that a plurality of said through openings (312) are provided at the periphery of said plate-shaped portion (31) and are uniformly arranged along the periphery of said plate-shaped portion (31).

5. Valve block according to any one of claims 1 to 4, characterized in that the plate-shaped portion (31) is in particular made of a brass material or an aluminum material.

6. Valve block according to any one of claims 1 to 4, characterized in that the upper body (32) and the lower body (33) are in particular made of PPS engineering plastic or PEEK engineering plastic.

7. A valve arrangement comprising a valve seat member (20), the valve seat member (20) having an inlet (221) and an outlet (222), the inlet (221) communicating with a valve cavity (R1); -a valve block (30) according to any of claims 1 to 6, wherein the bottom surface of the lower body portion (33) of the valve block (30) abuts the top surface of the valve seat member (20); the valve block (30) is rotatable relative to the valve seat member (20) to communicate the orifice (311) with the outlet (222) or to close the outlet (222).

8. The valve device according to claim 7, further comprising a filter element (40), said filter element (40) being embedded in said through cavity (321) of said upper body (32) and having a predetermined distance from the top surface of said plate-shaped portion (31), said orifice (311) communicating with a housing cavity (R2) defined by said filter element (40) and said plate-shaped portion (31) and said upper body (32).

9. The valve device according to claim 8, wherein the filter member (40) is formed by sintering tin bronze balls or stainless steel balls; alternatively, the filter element (40) is made of a multi-layer stainless steel mesh.