CN108799528B

CN108799528B - Valve device

Info

Publication number: CN108799528B
Application number: CN201710292781.XA
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: 2017-04-28
Filing date: 2017-04-28
Publication date: 2020-01-03
Anticipated expiration: 2037-04-28
Also published as: CN108799528A

Abstract

The invention discloses a valve device, which comprises a driving part and a valve seat part, wherein the valve seat part is provided with an inlet, an outlet and a valve port communicated with the outlet, and the inlet is communicated with a valve cavity; the bottom surface of the sliding block is attached to the top surface of the valve seat component; the sliding block is provided with a plurality of flow passage holes, an open slot and a blocking part which are circumferentially arranged around the rotation center of the sliding block; the aperture of each flow passage hole is not completely the same and is smaller than the drift diameter of the valve port, the flow area of the open slot is not smaller than the flow area of the valve port, and each flow passage hole and the open slot are communicated with the valve cavity; the driving component can drive the slide block to rotate relative to the valve seat component so as to enable the flow passage hole or the open slot to be communicated with the outlet or enable the blocking part to close the outlet. The flow deviation of the valve device can be controlled in a small range to meet the flow precision control requirement of a refrigerator and a similar small refrigeration system, and the valve device has a valve port full-open function, can achieve the defrosting of the surface of an evaporator and increase the humidity in the refrigerator, and improves the fresh-keeping effect of the refrigerator.

Description

Valve device

Technical Field

The invention relates to the technical field of fluid control components, in particular to a valve device for flow regulation.

Background

Along with the adjustment of the energy efficiency standard test requirement of the refrigerator, the energy efficiency requirement of the refrigerator is improved, the throttling part of the existing refrigerator mostly adopts capillary throttling, and because the capillary does not have the flow regulation function, a refrigerating system cannot reach the optimal operation condition under different environmental conditions, and the influence on the energy efficiency is large.

In the prior art, an electronic expansion valve for an air conditioner is applied to a refrigerator to realize a flow regulation function, please refer to fig. 1, where fig. 1 is a schematic cross-sectional view of the electronic expansion valve for the air conditioner.

When the valve is in use, the magnetic rotor 1 'of the motor is driven to rotate through the external magnet exciting coil to drive the valve needle screw rod 2' and the fixing nut 3 'to rotate relatively, so that the valve needle 5' at the valve port 4 'is moved up and down, and the change of the flow section of the valve port 4' is realized through the change of the relative position of the conical surface end part of the valve needle 5 'and the valve port 4', so that the flow rate is adjusted.

In an air conditioning system, an electronic expansion valve adopts closed-loop control and is a linear flow characteristic, the influence of flow deviation at a specific pulse working point in the system is relatively small, and the flow deviation is allowed to reach 20%; in addition, in the air conditioning system, the compressor is not stopped, and when the control temperature is balanced, the compressor is operated at an extremely low frequency, for example, 10Hz, so that the electronic expansion valve for air conditioning does not need to have a function of closing all the valves.

However, the refrigerating capacity of the refrigerator is small, and accordingly, the adjusting range is also small, and when the electronic expansion valve shown in fig. 1 adjusts the flow rate by using the valve port 4 'and the tapered valve needle 5', the deviation of the flow rate control precision is 20%, which far exceeds the flow rate control precision required by the refrigerator.

In addition, the refrigerator is an intermittent refrigeration device, the compressor stops after temperature balance is achieved, the refrigerant of the condenser is closed to flow into the evaporator after the refrigerator stops, energy conservation is facilitated, and more accurate temperature control can be guaranteed, so that the existing electronic expansion valve cannot meet the requirement of internal leakage of the refrigerator system, and even if the valve needle 5 'can completely close the valve port 4', the valve port 4 'and the valve needle 5' are easy to wear, influence flow control accuracy and are easy to block.

It will be appreciated that similar problems exist for other small refrigeration systems other than refrigerators.

Therefore, how to design a valve device that not only can realize the flow regulation function, but also can meet the flow precision control requirement of refrigerators and similar small refrigeration systems is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a valve device, the flow deviation of the valve device can be controlled within a small range, the flow precision control requirement of a refrigerator and a similar small refrigeration system can be met, the valve device has a valve port full-open function, the defrosting of the surface of an evaporator can be realized, the humidity in the refrigerator can be increased, and the fresh-keeping effect of the refrigerator can be improved.

In order to solve the technical problem, the invention provides a valve device, which comprises a driving part and a valve seat part, wherein the valve seat part is provided with an inlet, an outlet and a valve port communicated with the outlet, and the inlet is communicated with a valve cavity;

the slide block is supported by the valve seat part, and the bottom surface of the slide block is attached to the top surface of the valve seat part;

the sliding block is provided with a plurality of flow passage holes, an open slot and a blocking part which are circumferentially arranged around the rotation center of the sliding block; the aperture of each flow passage hole is not completely the same and is smaller than the aperture of the valve port, the flow area of the open slot is not smaller than the flow area of the valve port, and each flow passage hole and the open slot are communicated with the valve cavity;

the driving component can drive the sliding block to rotate relative to the valve seat component, so that the flow passage hole or the open groove is communicated with the valve port, or the blocking part closes the valve port.

The valve device provided by the invention abandons a valve needle structure of a hollow-calling electronic expansion valve in the prior art, a component for regulating flow is realized by adopting a slide block structure, a plurality of flow passage holes, an open slot and a plugging part are arranged on the slide block along the circumferential direction, wherein each flow passage hole and each open slot are communicated with a valve cavity, an inlet of a valve seat component is also communicated with the valve cavity, the slide block is driven by a driving component to rotate so as to enable the flow passage holes or the open slots to be communicated with a valve port of the valve seat component, thus enabling the inlet to be communicated with an outlet, or enabling the plugging part to close the valve port, thus enabling the inlet to be blocked from the outlet, and realizing the communication or the blocking of the inlet and the outlet by the rotation of the slide block relative to the valve seat component, so that the valve device has the function of complete closing, and the.

In addition, the aperture of each flow channel hole is not completely the same and is smaller than the drift diameter of the valve port, thus, different flow channel holes on the sliding block are communicated with the valve port through the rotation of the sliding block, so that the flow regulation is realized, and because the flow channel holes are easy to process and the accuracy deviation can be controlled in a smaller range, the flow deviation can be controlled in a smaller range, such as within 5 percent, through the arrangement of the flow channel holes of the sliding block, the flow control accuracy requirement of a refrigerator and a similar small refrigeration system can be met; meanwhile, the flow area of the open slot is not smaller than that of the valve port, when the open slot is communicated with the valve port, the valve device has a full-open function, and the throttling degree is relatively small, so that the defrosting on the surface of the evaporator can be realized, the humidity in the refrigerator can be increased, and the fresh-keeping effect of the refrigerator can be improved.

The drive part includes the rotor part, the rotor part include the magnet and the cartridge in the pivot of magnet, the slider cover is located the pivot, can drive when the rotor part rotates the slider rotates.

And a clamping structure is also arranged between the magnet and the sliding block.

The lower end of the magnet is provided with a protruding key part, the sliding block is provided with a key groove matched with the key part, and the key part and the key groove form the clamping structure.

The magnetic valve further comprises a shell sleeved on the magnet, and the bottom of the shell is fixed with the valve seat component; the magnet includes section of thick bamboo portion and baffle portion, baffle portion will the inner chamber of section of thick bamboo portion is separated for epicoele and cavity of resorption, wherein, the perisporium of cavity of resorption the shell reaches the valve seat part encloses to close and forms the valve pocket.

And a pre-tightening spring is further arranged between the sliding block and the partition plate part, so that the sliding block is tightly attached to the top surface of the valve seat part.

The partition part is provided with more than one balance hole, and the balance holes are communicated with the upper cavity and the lower cavity.

The rotating shaft is further inserted in the valve seat component and is in clearance fit with the valve seat component, so that the rotating shaft can rotate relative to the valve seat component.

A stop member is included to define an initial relative position of the slider and the valve seat member.

The stop component comprises a first stop part fixedly arranged on the valve seat component and a second stop part arranged on the driving component, and the driving component can drive the second stop part to synchronously rotate along with the sliding block; and is configured to:

the second stop part is in an abutting state with one side of the first stop part, and the blocking part closes the valve port; in the process that the second stopping part rotates along with the sliding block, the plurality of flow passage holes and the open groove are sequentially communicated with the valve port, and the second stopping part is abutted against the other side of the first stopping part along the rotation direction under the condition that the open groove is communicated with the valve port.

The first stopping part is an elastic piece.

The bottom surface of the sliding block is provided with a plurality of inner grooves which correspond to the positions of the plurality of flow passage holes respectively, and the size of each inner groove is larger than that of the corresponding flow passage hole.

The drift diameter of the valve port is larger than 1.6mm, and the aperture of each flow passage hole is selected from 0.1 mm-0.3 mm.

Drawings

Fig. 1 is a schematic cross-sectional view of an electronic expansion valve for a conventional air conditioner;

FIG. 2 is a schematic cross-sectional view of one embodiment of a valve assembly according to the present invention;

FIG. 3 is an angular schematic view of the slider shown in FIG. 2;

FIG. 4 is a schematic view of an alternate angle configuration of the slider shown in FIG. 2;

FIG. 5 is a top view of the slider shown in FIG. 2;

FIG. 6 is a cross-sectional schematic view of the slider shown in FIG. 2;

FIG. 7 is a top view of a slider with a filter element assembled in an exemplary embodiment;

FIG. 8 is a schematic cross-sectional view of the slide of FIG. 7 with the filter element attached;

FIG. 9 is a schematic illustration of the construction of the valve seat member shown in FIG. 2;

FIG. 10 is a top view of the valve seat member of FIG. 9;

FIG. 11 is a schematic cross-sectional view taken along line C-C of FIG. 10;

figure 12 is a schematic diagram of the rotor components shown in figure 2;

figure 13 is a schematic cross-sectional view of the rotor component shown in figure 2.

In fig. 1:

the magnetic rotor 1 ', the valve needle screw 2 ', the fixing nut 3 ', the valve port 4 ' and the valve needle 5 ';

in FIGS. 2-13:

the rotor part 10, the magnet 11, the cylinder part 111, the partition part 112, the balance hole 1121, the key part 113, the second stopper part 114, the rotating shaft 12, and the shaft sleeve 121;

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 slide block 30, the runner holes 31(31a, 31b, 31c, 31d), the cavity 32, the support platform 33, the key groove 34, the inner groove 35, the pre-tightening spring 36 and the open groove 37;

a filter member 40;

a first stopper 50, a stopper pin 51;

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

Detailed Description

The core of the invention is to provide a valve device, the flow deviation of the valve device can be controlled within a smaller range, the flow precision control requirement of a refrigerator and a similar small-sized refrigeration system can be met, the valve device has the function of fully opening a valve port, the defrosting of the surface of an evaporator can be realized, the humidity in the refrigerator can be increased, and the fresh-keeping effect of the refrigerator can be improved.

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.

Referring to fig. 2, fig. 2 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, an outlet 222 and a valve port 223 communicating with the outlet 222, the inlet 221 communicating with a valve chamber R1 of the valve arrangement.

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

The slider 30 has a plurality of flow passage holes 31 circumferentially arranged around its rotation center, an open groove 37 and a blocking portion; wherein, the aperture of each flow passage hole 31 is not completely the same and is smaller than the drift diameter of the valve port 223, and the flow area of the open slot 37 is not smaller than the flow area of the valve port 223; each of the flow passage hole 31 and the open groove 37 communicates with the valve chamber R1.

The driving means can drive the slider 30 to rotate relative to the valve seat member 20 to connect the runner hole 31 or the open groove 37 with the valve port 223, thereby connecting the inlet 221 and the outlet 222, or to close the valve port 223 by the blocking portion, thereby blocking the inlet 221 and the outlet 222.

It will be appreciated that the distance from the flow passage hole 31 to the rotational center of the slider 30 should be such that the flow passage hole 31 can communicate with the valve port 223 when the slider 30 rotates.

As above, the valve device abandons the valve needle structure of the hollow-calling electronic expansion valve in the prior art, and realizes the component for adjusting the flow rate by adopting a slide block structure, a plurality of flow passage holes 31, an open groove 37 and a blocking portion are provided in the slider 30 in the circumferential direction, wherein each of the flow passage holes 31 and the open grooves 37 communicates with the valve chamber R1, the inlet 221 of the valve seat member 20 also communicates with the valve chamber R1, the slider 30 is rotated by the driving means to communicate the runner hole 31 or the open groove 37 with the valve port 223 of the valve seat member 20, thereby communicating the inlet 221 with the outlet 222, or the blocking portion closes the valve port 223 so that the inlet 221 and the outlet 222 are blocked, and thus, the inlet 221 and the outlet 222 are communicated or separated by the rotation of the slide block 30 relative to the valve seat part 20, so that the valve device has a full closing function, and the situation of clamping failure cannot occur in the full closing process.

In addition, the aperture of each flow passage hole 31 is not completely the same and is smaller than the drift diameter of the valve port 223, thus, the slider 30 rotates to communicate different flow passage holes 31 on the slider 30 with the valve port 223, thereby realizing the adjustment of flow, because the flow passage holes 31 are easy to process and the accuracy deviation can be controlled in a smaller range, and can be set smaller according to the system requirements, the flow deviation can be easily controlled in a smaller range, such as within 5%, by setting the flow passage holes 31 on the slider 30, and the flow control accuracy requirements of refrigerators and similar small refrigeration systems can be met; meanwhile, the flow area of the open slot 37 is not smaller than that of the valve port 223, when the open slot 37 is communicated with the valve port 223, the valve device has a full-open function, the throttling degree is relatively small, accordingly, defrosting on the surface of the evaporator can be achieved, humidity in the refrigerator can be increased, and the fresh-keeping effect of the refrigerator can be improved.

Referring to fig. 3-6, fig. 3 is a schematic view of an angle structure of the slider shown in fig. 2; FIG. 4 is a schematic view of an alternate angle configuration of the slider shown in FIG. 2; FIG. 5 is a top view of the slider shown in FIG. 2; FIG. 6 is a cross-sectional schematic view of the slider shown in FIG. 2.

In a specific embodiment, the plurality of flow passage holes 31 are circumferentially arranged in an arc shape around the rotation center of the slider 30, and the open groove 37 is disposed near the outer end of one flow passage hole 31, so that the portion between the open groove 37 and the other outer end of the flow passage hole 31 forms a blocking portion of the slider 30.

In the solutions shown in fig. 4 and 5, the slider 30 is specifically provided with four flow passage holes 31, and the four flow passage holes 31 are 31a, 31b, 31c and 31d in sequence in a clockwise direction from the perspective shown in fig. 5, the open groove 37 is disposed near the flow passage hole 31d, and a circumferential portion between the open groove 37 and the flow passage hole 31a on the slider 30 is a blocking portion.

In the illustrated embodiment, the aperture of each of the four

flow channel holes

31a, 31b, 31c, and 31d increases gradually, and the angles between two adjacent flow channel holes 31 are equal, that is, the flow channel holes 31 are uniformly arranged on the arc segment where the flow channel holes 31 are arranged; specifically, the angle between the center of the open groove 37 and the flow passage hole 31d is also equal to the angle between two adjacent flow passage holes 31; by such a design, the slider 30 can adjust the flow rate once when rotating the same angle, thereby facilitating the operation of the valve device.

As described above, the structural design of the plurality of flow passage holes 31 facilitates control of the number of flow passage holes 31 and the diameter of each flow passage hole 31, thereby facilitating control of the flow rate to meet the control requirements of refrigerators and similar small refrigeration systems. In one embodiment, the diameters of the

flow path holes

31a, 31b, 31c, and 31d are set to 0.15mm, 0.18mm, 0.21mm, and 0.24mm in this order.

It can be understood that the open slot 37 is disposed on the bottom surface of the slider 30, when the slider 30 is attached to the valve seat member 20, a gap exists between the slider 30 and the valve seat member 20 at the position of the open slot 37, the size of the gap is the depth of the open slot 37, when the slider 30 rotates to the position where the open slot 37 corresponds to the valve port 223, the refrigerant in the valve cavity R1 can enter the open slot 37 through the gap, and then flow into the outlet 222 through the valve port 223. In the specific setting, in order to meet the defrosting requirement of the refrigerator, the through diameter of the valve port 223 is set to be larger, so that the throttling effect is reduced as much as possible, the through diameter is usually not smaller than 1.6mm, and the through area of the open groove 37 is correspondingly set.

It is understood that, in practice, the aperture of each flow passage hole 31 may be irregular when arranged, and in addition, the plurality of flow passage holes 31 may be unevenly arranged on the circular arc segment where the flow passage holes 31 are arranged. But relatively, the regular and even arrangement as shown in the figure is more convenient for controlling the product.

Further, referring to fig. 4, a plurality of inner grooves 35 are formed in the bottom surface of the slider 30, and correspond to the positions of the plurality of flow passage holes 31, respectively, and the size of each inner groove 35 is larger than the corresponding flow passage hole 31.

With the above arrangement, when the slider 30 is rotated relative to the valve seat member 20, direct friction between the end of the flow path hole 31 and the valve seat member 20 is avoided, and the flow path hole 31 can be prevented from being clogged by rotational wear between the bottom surface of the slider 30 and the top surface of the valve seat member 20, thereby ensuring reliability of flow rate control of the product.

Specifically, for the convenience of processing, the sizes of the inner grooves 35 may be uniform, and in the scheme shown in fig. 4, each inner groove 35 is a counter bore structure with a uniform aperture. It should be understood that the shape of the inner groove 35 is not limited as long as direct friction of the end of the flow passage hole 31 with the valve seat member 20 can be avoided.

Referring also to fig. 7-8, fig. 7 is a top view of a slider with a filter assembly mounted therein according to an embodiment; fig. 8 is a schematic cross-sectional view of the slider of fig. 7 with the filter element attached.

The valve device is further provided with a filtering component 40 for filtering the refrigerant flowing through the flow passage hole 31 of the sliding block 30 so as to prevent the flow passage hole 31 from being blocked by foreign matters to influence the use performance of the product.

The filtering capacity of the filter member 40 can be determined by combining the aperture of the flow channel hole 31 with other requirements, and taking the specific aperture value of each flow channel hole 31 as an example, the aperture range of each flow channel hole 31 is 0.1mm to 0.3mm, so that the filter member 40 can filter out at least impurities and foreign matters larger than 0.1mm when in application. 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.

Obviously, the filter member 40 should be disposed at an upstream position of the flow passage hole 31 of the slider 30 in terms of the flow direction of the refrigerant.

In a specific embodiment, the top of the slider 30 is provided with a cavity 32, the filter element 40 is embedded in the cavity 32, and the filter element 40 is spaced from the bottom wall of the cavity 32 by a predetermined distance, so that a receiving cavity R2 is formed between the filter element 40 and the cavity 32, and the filtered refrigerant flows into the flow passage holes 31 through the receiving cavity R2, and obviously, each flow passage hole 31 should be communicated with the receiving cavity R2.

The predetermined distance between the filter member 40 and the bottom wall of the cavity 32 may be set as desired.

More specifically, a support table 33 is provided at a central position of the bottom of the cavity 32 to support the filter member 40, as can be appreciated with reference to fig. 3 and 6, so as to facilitate positioning of the filter member 40 within the cavity 32.

When so arranged, as shown in fig. 8, the aforesaid receiving chamber R2 is embodied as an annular chamber defined by the bottom wall of the filter element 40, the side and bottom walls of the cavity 32, and the peripheral wall of the support 33.

It should be noted that in this embodiment, the filter element 40 is embedded in the slider 30, but when the slider 30 rotates relative to the valve seat member 20, the filter element 40 may or may not rotate together with the slider, which does not affect the filtering function of the filter element 40.

The valve seat member provided herein in cooperation with a slider may be understood with reference collectively to fig. 9-11, wherein fig. 9 is a schematic illustration of the construction of the valve seat member shown in fig. 2; FIG. 10 is a top view of the valve seat member of FIG. 9; fig. 11 is a schematic cross-sectional view taken along line C-C in fig. 10.

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.

The valve port 223 is opened in the top of the valve seat member 20 and communicates with the outlet 222, a flow port 224 communicating with the inlet 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 directly communicate with the flow passage hole 31 or the open groove 37 of the slider 30.

It will be appreciated that with the valve seat member 20 arranged as described above, the position of the flow passage aperture 31 of the slider 30 should correspond to the position of the valve port 223, so that during rotation of the slider 30, the flow passage aperture 31 can communicate with the valve port 223 and thus with the outlet 222.

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 flow passage hole 31 or the open groove 37 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 slider 30 directly contacts the valve seat body 22 and rotates with respect 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.

Referring also to fig. 12-13, fig. 12 is a schematic diagram of the rotor components shown in fig. 2; figure 13 is a schematic cross-sectional view of the rotor component shown in figure 2.

In this embodiment, the driving unit for driving the slider 30 to rotate is a motor, and specifically includes a rotor unit 10 and a coil unit.

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

In order to make the slide block 30 rotate together when the rotor component 10 rotates, the slide block 30 may be fixed relative to the rotating shaft 12, for example, the fit between the slide block 30 and the rotating shaft 12 is an interference fit.

Of course, the slider 30 and the magnet 11 may be fixed relatively, and in this embodiment, a fastening structure is provided between the magnet 11 and the slider 30, so that the slider 30 can rotate together with the magnet 11.

Specifically, the lower end of the magnet 11 has a protruding key portion 113, the slider 30 is provided with a key groove 34 that fits the key portion 113, and the slider 30 and the magnet 11 are fixed relative to each other by the engagement and fixation of the key portion 113 and the key groove 34. The key portion 113 of the magnet 11 is fitted into the key groove 34, and functions to press the slider 30 against the valve seat body 22 to some extent, so that the slider 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.

Specifically, the top of the support base 21 has an upward stepped surface to facilitate positioning with the housing 60.

In a specific embodiment, the magnet 11 includes a cylinder portion 111 and a partition portion 112, wherein the partition portion 112 divides an inner cavity of the cylinder portion 111 into an upper cavity and a lower cavity, so that the rotor 12 is inserted and fixed in the partition portion 112, a shaft sleeve 121 can be connected to a top of the rotor 12, and the shaft sleeve 121 is engaged with an inner top wall of the housing 60.

The valve chamber R1 is formed by the surrounding wall of the lower cavity of the magnet 11, the housing 60 and the supporting seat 21, that is, in this embodiment, the lower cavity of the magnet 11 is a part of the valve chamber R1, which can shorten the axial dimension of the valve device and is beneficial to miniaturization.

In a specific embodiment, a biasing spring 36 is disposed between the partition portion 112 and the slider 30 to keep the slider 30 in close contact with the top surface of the valve seat body 22.

In the embodiment shown in fig. 1, in the case where the filter member 40 is fitted to the slider 30, the biasing spring 36 actually abuts against the filter member 40.

In a specific embodiment, more than one balance hole 1121 is further disposed on the partition portion 112 of the magnet 11, and the balance holes 1121 communicate the upper chamber and the lower chamber to maintain the pressure balance between the upper chamber and the lower chamber of the magnet 11, thereby preventing the magnet 11 from moving up and down.

In a specific embodiment, in order to ensure that the rotation center of the slider 30 relative to the valve seat member 20 does not change, and to ensure that each of the flow passage holes 31 can communicate with the outlet 222 during the rotation of the slider 30, the lower end of the rotating shaft 12 is further inserted into the valve seat member 20, so as to ensure the coaxiality of the rotor member 10, the slider 30, and the valve seat member 20.

Specifically, the valve seat body 22 is provided with a shaft hole 225 which is engaged with the rotary shaft 12, and it is apparent that the rotary shaft 12 is clearance-fitted with the shaft hole 225 so that the rotary shaft 12 can rotate relative to the valve seat member 20.

The valve device further comprises stop means to define the initial relative position of the slider 30 and the valve seat means 20, facilitating the commissioning of the product and the determination of the time reference.

In a specific scheme, the stopping component includes a first stopping portion 50 fixedly arranged on the valve seat component 20 and a second stopping portion 114 arranged on the driving component, and the driving component can drive the second stopping portion 114 to synchronously rotate along with the slider 30; and is configured to:

the second stopper 114 is in contact with one side of the first stopper 50, and the closing member closes the valve port 223; when the second stopper 114 rotates with the slider 30, the flow passage holes 31 and the open grooves 37 are sequentially communicated with the valve port 223, and the second stopper 114 abuts against the other side of the first stopper 50 in a state where the open grooves 37 are communicated with the valve port 223 in the rotational direction.

In a specific embodiment, the first stopping portion 50 is an elastic member, so that the second stopping portion 114 has an elastic buffer when abutting against the elastic member, thereby avoiding position configuration inaccuracy caused by abrasion after long-term operation.

Specifically, the first stopper 50 may be made of rubber and fixed to the support base 21 by a stopper pin 51, wherein a drop-proof boss is provided on a top of the stopper pin 51 to prevent the first stopper 50 from dropping out.

The valve device provided by the present invention is 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. Valve arrangement comprising a drive member and a valve seat member (20), characterized in that the valve seat member (20) has an inlet (221), an outlet (222) and a valve port (223) communicating with the outlet (222), the inlet (221) communicating with a valve chamber (R1);

the valve further comprises a sliding block (30) supported by the valve seat part (20), wherein the bottom surface of the sliding block (30) is attached to the top surface of the valve seat part (20);

the sliding block (30) is provided with a plurality of flow passage holes (31) which are circumferentially arranged around the rotation center of the sliding block, an open groove (37) and a blocking part; the aperture of each flow passage hole (31) is not completely the same and is smaller than the aperture of the valve port (223), the flow area of the open slot (37) is not smaller than the flow area of the valve port (223), and each flow passage hole (31) and the open slot (37) are communicated with the valve cavity (R1);

the main body of the sliding block (30) is of a cylindrical structure, a cavity (32) is formed in the top of the sliding block (30), the flow passage hole (31) is communicated with the valve cavity (R1) through the cavity (32), and a filtering component (40) used for filtering a refrigerant flowing through the flow passage hole (31) is further arranged in the cavity (32);

the drive means can drive the slider (30) to rotate relative to the valve seat means (20) so as to cause the flow passage hole (31) or the open groove (37) to communicate with the valve port (223), or cause the closing portion to close the valve port (223).

2. The valve device according to claim 1, wherein the driving member comprises a rotor member (10), the rotor member (10) comprises a magnet (11) and a rotating shaft (12) inserted into the magnet (11), the rotating shaft (12) is sleeved with the slider (30), and the slider (30) can be driven to rotate when the rotor member (10) rotates.

3. A valve device according to claim 2, characterized in that a snap-in structure is also provided between the magnet (11) and the slider (30).

4. A valve device according to claim 3, wherein the lower end of the magnet (11) has a projecting key portion (113), the slider (30) has a key groove (34) which cooperates with the key portion (113), and the key portion (113) and the key groove (34) form the catching structure.

5. A valve arrangement according to claim 2, further comprising a housing (60) surrounding the magnet (11), the housing (60) being fixed at its bottom to the valve seat member (20); magnet (11) include section of thick bamboo portion (111) and baffle portion (112), baffle portion (112) will the inner chamber of section of thick bamboo portion (111) is separated for epicoele and cavity of resorption, wherein, the perisporium of cavity of resorption shell (60) reaches valve seat part (20) encloses to close and forms valve chamber (R1).

6. A valve arrangement according to claim 5, characterized in that a pretension spring (36) is arranged between the slide (30) and the partition (112) in order to bring the slide (30) into abutment with the top surface of the valve seat part (20).

7. The valve apparatus as claimed in claim 5, wherein the partition portion (112) has one or more balancing holes (1121), the balancing holes (1121) communicating the upper chamber and the lower chamber.

8. A valve arrangement according to claim 2, characterised in that the shaft (12) is also inserted in the valve seat part (20) with a clearance fit so that the shaft (12) can rotate relative to the valve seat part (20).

9. Valve arrangement according to any of claims 1-8, further comprising stop means to define an initial relative position of the slider (30) and the valve seat means (20).

10. A valve device according to claim 9, characterized in that said stop means comprise a first stop portion (50) fixed to said valve seat means (20) and a second stop portion (114) provided to said drive means, said drive means being able to bring said second stop portion (114) into synchronous rotation with said slider (30); and is configured to:

the second stopper (114) is in an abutting state with one side of the first stopper (50), and the blocking part closes the valve port (223); when the second stopper (114) rotates with the slider (30), the plurality of flow passage holes (31) and the open groove (37) are sequentially communicated with the valve port (223), and the second stopper (114) abuts against the other side of the first stopper (50) in a state where the open groove (37) is communicated with the valve port (223) along the rotation direction.

11. A valve device according to claim 10, wherein the first stop (50) is an elastic member.

12. The valve apparatus according to any one of claims 1 to 8, wherein the bottom surface of the slider (30) has a plurality of inner grooves (35) corresponding to the positions of the plurality of flow passage holes (31), respectively, and each of the inner grooves (35) has a size larger than the corresponding flow passage hole (31).

13. A valve device according to any one of claims 1 to 8, characterized in that the diameter of the valve port (223) is larger than 1.6mm, and the diameter of each flow passage hole (31) is selected between 0.1mm and 0.3 mm.