CN117927709B - Air pressure balance valve of refrigerator - Google Patents

Abstract

The invention belongs to the technical field of balance valves, and particularly relates to an air pressure balance valve of a refrigerator, which comprises a ventilation valve and a regulating valve, wherein a first refrigerator connector and two branch pipes are arranged on the ventilation valve; the air pressure jacking mechanism comprises an elastic diaphragm, a valve pin, a first elastic piece and a jacking block, wherein the valve pin is vertically arranged and connected with the elastic diaphragm, the jacking block is fixedly arranged at the top of the valve pin, each group of valve mechanism comprises a sealing valve plate and an elastic telescopic mechanism, the elastic telescopic mechanism comprises a second elastic piece and a telescopic pin, the telescopic pin is horizontally arranged and connected with the upper half part of the regulating valve body in a sliding manner, and the sealing valve plate is connected with the telescopic pin. The invention can automatically control the amount of air entering the refrigerator according to the difference of the air pressure inside and outside the refrigerator, and relatively reduce the load of the refrigerator.

Description

Air pressure balance valve of refrigerator

Technical Field

The invention belongs to the technical field of balance valves, and particularly relates to an air pressure balance valve of a refrigerator.

Background

The balancing valve is a valve commonly used in pneumatic control systems to balance the pressure or flow of gas to a relatively stable state, wherein the air pressure balancing valve of the refrigerator is mainly used for keeping the air pressure inside and outside the refrigerator balanced. At normal temperature, the air pressure inside and outside the refrigerator are equal. However, when the temperature changes, the volume of the air also changes, so that the difference between the internal pressure and the external pressure is generated, and if the refrigerator is not treated correspondingly, the difference between the internal pressure and the external pressure can cause deformation and faults of the refrigerator.

The traditional air pressure balance valve mostly comprises a balance valve body, a valve core and an elastic reset piece, wherein the balance valve body is provided with two air ports, one air port is connected with the refrigerator, the other air port is communicated with the outside, the valve core plugs the air port communicated with the outside on the balance valve in the initial process, when the pressure difference between the inside and the outside of the refrigerator is large, the air pressure can jack the valve core, so that the air port communicated with the outside on the balance valve is opened, the inside and the outside of the refrigerator are communicated finally, and the air pressure inside and outside the refrigerator can gradually approach to be consistent.

After the inside and outside atmospheric pressure of freezer balances, the case no longer receives the pneumatic drive, and the elasticity reset piece can drive the case and reset to initial state, wherein, at the in-process of balanced the inside and outside atmospheric pressure of freezer, because the case only receives the pneumatic drive, consequently the degree of closure of the gas port that leads to the external world on the balanced valve body can't intervene, can finally lead to the gas volume that gets into in the freezer to be unable to regulate and control, can appear two kinds of situations this moment:

Firstly, if the opening of the balance valve leading to the outside is smaller, at the moment, the amount of the outside air entering the refrigerator is less, so that the time required by the balance of the air pressure inside and outside the refrigerator is improved, and because the temperature of the outside air is far higher than that of the air inside the refrigerator, when the refrigerator is communicated with the outside for a long time, the refrigerator can continuously work, so that the load of the refrigerator is increased, and the electric energy consumption is high; secondly, if the opening of the balance valve leading to the outside is larger, the amount of outside air entering the refrigerator is larger at the moment, the time required by the balance of the air pressure inside and outside the refrigerator can be reduced, but no matter how much the air pressure inside and outside the refrigerator is different, once the air pressure difference is generated inside and outside the refrigerator, and the outside air pressure is larger than the elasticity of the elastic reset piece, the valve core can be jacked up. Therefore, when the internal and external air pressures of the refrigerator are smaller, the valve core is jacked up, a large amount of external air can enter the refrigerator, the air supply quantity can be larger than the actual required quantity, and then the load of the final refrigerator can be rapidly increased.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide the air pressure balance valve for the refrigerator, which can automatically control the amount of air entering the refrigerator according to the pressure difference between the inside and outside of the refrigerator and relatively reduce the load of the refrigerator.

In order to achieve the technical purpose, the invention adopts the following technical scheme: the air pressure balance valve of the refrigerator comprises a ventilation valve and a regulating valve, wherein a first refrigerator connector and two branch pipes are arranged on the ventilation valve, the first refrigerator connector is directly connected with the refrigerator, the refrigerator is communicated with the inside and the outside through the two branch pipes, the regulating valve is arranged on the ventilation valve and comprises a regulating valve body, an air pressure jacking mechanism and two groups of valve mechanisms, and the air pressure jacking mechanism is arranged in the lower half part of the regulating valve body;

the pneumatic jacking mechanism comprises an elastic diaphragm, a valve pin, a first elastic piece and a jacking block, wherein the valve pin is vertically arranged and connected with the elastic diaphragm, the jacking block is fixedly arranged at the top of the valve pin, each group of valve mechanisms comprises a sealing valve plate and an elastic telescopic mechanism, the elastic telescopic mechanism comprises a second elastic piece and a telescopic pin, the telescopic pin is horizontally arranged and connected with the upper half part of the regulating valve body in a sliding manner, and the sealing valve plate is connected with the telescopic pin;

Wherein, two flexible round pins distribute from top to bottom along vertical direction, and two seal valve plates cover respectively on two branch pipes, and elastic diaphragm drives the valve pin through the inside and outside atmospheric pressure difference of freezer and rises, and the kicking block cooperates with the tip slide wedge of corresponding flexible round pin to this drives the seal valve plate through the horizontal slip of flexible round pin and opens the branch pipe that corresponds, and the elastic component is used for the reset of valve pin, and the elastic component is used for the reset of flexible round pin No. two.

Further, the vent valve is rectangular, a vent cavity is arranged in the vent valve, the first refrigerator connector and the two branch pipes are respectively arranged on three side walls of the vent valve, the first refrigerator connector and the two branch pipes are communicated with the vent cavity, and the regulating valve body comprises a cylindrical valve body, a first valve seat and a second valve seat;

The first valve seat and the second valve seat are rectangular, the first valve seat is fixedly arranged at the top of the vent valve, the second valve seat is fixedly arranged at the top of the first valve seat, a first cylindrical air groove which is vertically arranged is formed in the first valve seat, the first cylindrical air groove is communicated with the top of the first valve seat, a second cylindrical air groove which is vertically arranged is formed in the second valve seat, the second cylindrical air groove is communicated with the top and the bottom of the second valve seat, and the lower end of the second cylindrical air groove is communicated with the upper end of the first cylindrical air groove;

The top of No. two disk seats is located to the vertical setting of cylindricality valve body and fixed, and the lower extreme of cylindricality valve body is with the top shutoff of No. two disk seats, and the elastic diaphragm is circular, and the elastic diaphragm is the level fixed locate No. one disk seat and No. two disk seats between, the shaping has the takeover that is linked together with No. one cylindricality air groove on the outer wall of No. one disk seat, the shaping has No. two freezer interfaces that are linked together with No. two cylindricality air grooves on the outer wall of No. two disk seats.

Further, the top of cylindricality valve body inwards has offered the cylindricality spout with elastic diaphragm coaxial, the valve pin is located No. two cylindricality air tanks, the through-hole that supplies the lower extreme coaxial of valve pin to pass is offered to elastic diaphragm's centre of a circle department, the coaxial fixed circular clamp plate that is equipped with in lower extreme of valve pin with elastic diaphragm clamp in opposite directions, the upper end of valve pin upwards passes the cylindricality valve body and stretches into in the cylindricality spout, no. one the elastic component is for locating No. two cylindricality air tanks in and the cover is located a spring on the valve pin, no. one the both ends of spring are inconsistent with the bottom of cylindricality valve body and the circular clamp plate that is located the top respectively.

Further, each elastic telescopic mechanism further comprises a strip-shaped mounting shell, two slots which are horizontally communicated with the cylindrical sliding groove are formed in the outer wall of the cylindrical valve body, the two slots are vertically distributed at intervals, the two strip-shaped mounting shells are horizontally arranged and are respectively fixedly arranged in the two slots, each telescopic pin comprises a shaft body and a rectangular end, one end, close to the cylindrical sliding groove, of each strip-shaped mounting shell is internally provided with a horizontally arranged square sliding groove, each rectangular end slides in each square sliding groove, and each rectangular end stretches into each cylindrical sliding groove;

The axis body level sets up, and the one end and the rectangle end of axis body link firmly, and the other end of axis body passes the bar installation shell and stretches out outside the bar installation shell, and No. two elastic component is for locating square spout in and the cover locate the epaxial spring No. two of axis, and the both ends of spring No. two are inconsistent with the inner wall of rectangle end and bar installation shell respectively, and every sealed valve plate all links firmly with the extension end of corresponding axis body through the connecting rod of vertical setting.

Further, the kicking block is conical, and the small-bore end of kicking block up, the heavy-calibre end of kicking block links firmly with the top is coaxial of valve pin, and the external diameter of valve pin is less than the internal diameter of cylindricality spout, and one side in every rectangle end orientation cylindricality spout all forms the ascending inclined plane of slope, and the toper face of kicking block is upwards inconsistent with the inclined plane to promote rectangle end inwards to slide.

Further, the upper end of the valve pin is coaxially provided with a narrow shaft, the ejector block is coaxially fixedly connected with the narrow shaft, the lower part of the ejector block is provided with a movable block coaxially sleeved on the narrow shaft, the movable block is consistent with the ejector block in structure and is in a symmetrical state, and an inclined downward abutting surface is formed on the rectangular end head positioned below and used for abutting against the conical surface on the movable block.

Further, the top of the cylindrical valve body is fixedly provided with a vertically arranged internal thread sleeve, an adjusting bolt is screwed in the internal thread sleeve, and the lower end of the adjusting bolt extends into the cylindrical chute downwards.

Further, a column-shaped air groove is fixedly provided with a vertically arranged support column, and when the round pressing plate positioned below is in contact with the top of the support column, the elastic diaphragm is in a horizontal state.

The beneficial effects of the invention are as follows:

Firstly, the valve pin can be lifted for the second time according to the pressure difference between the inside and outside of the refrigerator, after the valve pin is lifted for the first time, one of the branch pipes is opened to balance the air pressure inside and outside the refrigerator, and after the valve pin is lifted for the second time, the two branch pipes are opened together to automatically control the air quantity entering the refrigerator according to the pressure difference between the inside and outside of the refrigerator, so that the load of the refrigerator is relatively reduced.

Secondly, after the valve pin rises for the first time and when the valve pin does not rise for the second time, the branch pipe which is opened for the first time can be closed again, so that external gas cannot enter the refrigerator again, the refrigerator can not continuously cool in the stage, and the load of the refrigerator is further reduced. When the internal and external pressure difference of the refrigerator reaches a certain value again, the valve pin can rise for the second time, and after the valve pin rises for the second time, external air can enter the refrigerator through the two branch pipes, so that the time for balancing the internal and external air pressure of the refrigerator is shortened.

Thirdly, in the initial stage, as the elastic diaphragm can be subjected to the elastic force exerted by the first spring, the center of the elastic diaphragm can be in a falling state, and when the elastic diaphragm is used for a long time, the elastic diaphragm is weakened to finally influence the normal deformation of the elastic diaphragm.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a second embodiment of the present invention;

FIG. 3 is a top view of an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged partial schematic view at A1 in FIG. 4;

FIG. 6 is an enlarged partial schematic view at A2 in FIG. 4;

FIG. 7 is an exploded view of the three-dimensional structures of the first valve seat and the second valve seat according to the embodiment of the present invention;

FIG. 8 is an exploded view of a valve pin and resilient diaphragm in an embodiment of the present invention;

FIG. 9 is an exploded view of the three-dimensional structure of the valve pin, the top block and the movable block in an embodiment of the present invention;

FIG. 10 is a schematic perspective view of a telescopic pin according to an embodiment of the present invention;

fig. 11 is a schematic perspective view of a telescopic pin according to a second embodiment of the present invention.

In the figure: 1. a vent valve; 2. a first refrigerator interface; 3. a branch pipe; 4. an elastic diaphragm; 5. a valve pin; 6. a top block; 7. a sealing valve plate; 8. a telescopic pin; 9. a venting cavity; 10. a cylindrical valve body; 11. a valve seat I; 12. a valve seat II; 13. a first cylindrical air tank; 14. a second cylindrical air tank; 15. an outer connecting pipe; 16. a second refrigerator interface; 17. a cylindrical chute; 18. a through hole; 19. a circular pressing plate; 20. a first spring; 21. a strip-shaped mounting shell; 22. a slot; 23. a shaft body; 24. rectangular ends; 25. square chute; 26. a second spring; 27. a connecting rod; 28. an inclined plane; 29. a narrow shaft; 30. a movable block; 31. an abutting surface; 32. an internal thread sleeve; 33. an adjusting bolt; 34. and (5) supporting the column.

Detailed Description

The invention is described in further detail below with reference to the drawings and the detailed description.

As shown in fig. 1 to 11, an air pressure balance valve of a refrigerator comprises a ventilation valve 1 and a regulating valve, wherein a first refrigerator connector 2 and two branch pipes 3 are arranged on the ventilation valve 1, the first refrigerator connector 2 is directly connected with the refrigerator, the refrigerator is communicated with the inside and the outside through the two branch pipes 3, the regulating valve is arranged on the ventilation valve 1, the regulating valve comprises a regulating valve body, an air pressure jacking mechanism and two groups of valve mechanisms, and the air pressure jacking mechanism is arranged in the lower half part of the regulating valve body;

The pneumatic jacking mechanism comprises an elastic diaphragm 4, a valve pin 5, a first elastic piece and a jacking block 6, wherein the valve pin 5 is vertically arranged and connected with the elastic diaphragm 4, the jacking block 6 is fixedly arranged at the top of the valve pin 5, each group of valve mechanisms comprises a sealing valve plate 7 and an elastic telescopic mechanism, each elastic telescopic mechanism comprises a second elastic piece and a telescopic pin 8, the telescopic pin 8 is horizontally arranged and is connected with the upper half part of the regulating valve body in a sliding manner, and the sealing valve plate 7 is connected with the telescopic pin 8;

Wherein, two flexible round pins 8 distribute from top to bottom along vertical direction, and two seal valve plates 7 cover respectively on two branch pipes 3, and elastic diaphragm 4 drives valve pin 5 through the inside and outside air pressure difference of freezer and rises, and kicking block 6 cooperates with the tip slide wedge that corresponds flexible round pin 8 to this drives seal valve plate 7 through the horizontal slip of flexible round pin 8 and opens branch pipe 3 that corresponds, and the elastic component is used for the reset of valve pin 5, and the elastic component is used for the reset of flexible round pin 8.

In order to show how the elastic diaphragm 4 is fixed and how the elastic diaphragm 4 is driven to float by the air pressure difference, the following features are specifically provided:

The vent valve 1 is rectangular, a vent cavity 9 is arranged in the vent valve 1, the first refrigerator connector 2 and the two branch pipes 3 are respectively arranged on three side walls of the vent valve 1, the first refrigerator connector 2 and the two branch pipes 3 are communicated with the vent cavity 9, and the regulating valve body comprises a cylindrical valve body 10, a first valve seat 11 and a second valve seat 12;

The valve seat 11 and the valve seat 12 are rectangular, the valve seat 11 is fixedly arranged at the top of the vent valve 1, the valve seat 12 is fixedly arranged at the top of the valve seat 11, a first cylindrical air groove 13 which is vertically arranged is formed in the valve seat 11, the top of the valve seat 11 is communicated through the first cylindrical air groove 13, a second cylindrical air groove 14 which is vertically arranged is formed in the valve seat 12, the top and the bottom of the valve seat 12 are communicated through the second cylindrical air groove 14, and the lower end of the second cylindrical air groove 14 is communicated with the upper end of the first cylindrical air groove 13;

The top of No. two disk seats 12 is located and fixed to the vertical setting of cylindricality valve body 10, and the lower extreme of cylindricality valve body 10 is with the shutoff of No. two disk seats 12 top, and elastic diaphragm 4 is circular, and elastic diaphragm 4 is the level and fixedly locates between No. one disk seat 11 and No. two disk seats 12, and the shaping has the outer connecting tube 15 that is linked together with No. one cylindricality air tank 13 on the outer wall of No. one disk seat 11, and the shaping has No. two freezer interfaces 16 that are linked together with No. two cylindricality air tank 14 on the outer wall of No. two disk seats 12.

During actual use, the second refrigerator interface 16 is connected with the refrigerator, gas in the refrigerator can enter the second cylindrical air groove 14, external air can enter the first cylindrical air groove 13 through the outer connecting pipe 15, the elastic diaphragm 4 is finally used as a boundary, the upper part of the elastic diaphragm 4 is cool air, the lower part of the elastic diaphragm 4 is external air, and because the air pressure of the cool air is lower than that of the external air, the elastic diaphragm 4 can be jacked by the air pressure, and finally the valve pin 5 is driven to rise through the elastic diaphragm 4.

In order to reveal the specific structure of the spring No. one and how the valve pin 5 is connected to the elastic membrane 4, the following features are provided:

The top of cylindricality valve body 10 inwards has offered the cylindricality spout 17 with elastic diaphragm 4 coaxial line, valve pin 5 is located No. two cylindricality air tanks 14, the centre of a circle department of elastic diaphragm 4 has offered the through-hole 18 that supplies the lower extreme coaxial of valve pin 5 to pass, the coaxial fixed circular clamp plate 19 that is equipped with of lower extreme of valve pin 5 with elastic diaphragm 4 clamp in opposite directions, the upper end of valve pin 5 upwards passes cylindricality valve body 10 and stretches into cylindricality spout 17, no. one the elastic component is for locating No. two cylindricality air tanks 14 and cover locates the spring 20 on the valve pin 5, no. one the both ends of spring 20 are inconsistent with the bottom of cylindricality valve body 10 and the circular clamp plate 19 that is located the top respectively.

When external air pressure pushes up the elastic diaphragm 4, the valve pin 5 only can axially move because the valve pin 5 vertically passes through the cylindrical valve body 10, and finally the valve pin 5 is driven to directly ascend through the elastic diaphragm 4, when the valve pin 5 ascends, one of the round pressing plates 19 arranged at the lower end of the valve pin 5 can compress the first spring 20, so that the first spring 20 generates elasticity, and when the internal air pressure and the external air pressure of the refrigerator are approximately balanced, the elastic diaphragm 4 gradually loses the extrusion of the external air pressure, and therefore the elastic diaphragm 4 can be driven to downwards reset by the elasticity of the first spring 20.

In order to show how the elastic telescopic mechanism is installed and the specific structure of the second elastic piece is provided with the following characteristics:

Each elastic telescopic mechanism further comprises a strip-shaped mounting shell 21, two slots 22 which are horizontally communicated with the cylindrical sliding groove 17 are formed in the outer wall of the cylindrical valve body 10, the two slots 22 are vertically distributed at intervals along the vertical direction, the two strip-shaped mounting shells 21 are horizontally arranged and fixedly arranged in the two slots 22 respectively, each telescopic pin 8 comprises a shaft body 23 and a rectangular end 24, a square sliding groove 25 which is horizontally arranged is formed in one end, close to the cylindrical sliding groove 17, of the strip-shaped mounting shell 21, the rectangular end 24 slides in the square sliding groove 25, and the rectangular end 24 extends into the cylindrical sliding groove 17;

The axis body 23 is horizontally arranged, one end of the axis body 23 is fixedly connected with the rectangular end head 24, the other end of the axis body 23 penetrates through the strip-shaped mounting shell 21 and extends out of the strip-shaped mounting shell 21, the second elastic piece is a second spring 26 which is arranged in the square sliding groove 25 and sleeved on the axis body 23, two ends of the second spring 26 are respectively abutted against the rectangular end head 24 and the inner end wall of the strip-shaped mounting shell 21, and each sealing valve plate 7 is fixedly connected with the extending end of the corresponding axis body 23 through a vertically arranged connecting rod 27.

Because rectangular end 24 slides in square spout 25, then axis body 23 only can slide along the horizontal direction, and can not rotate, finally ensure that the sealed apron can accurately cover on corresponding branch pipe 3, when telescopic pin 8 is contradicted by kicking block 6 and slides, rectangular end 24 can retract in square spout 25, and the one end that axis body 23 connected seal valve plate 7 can outwards extend to bar mounting shell 21, axis body 23 can drive seal valve plate 7 through connecting rod 27 and open corresponding branch pipe 3, and at the in-process that whole telescopic pin 8 slided, rectangular end 24 can also compress No. spring 26, thereby make No. two spring 26 produce elasticity, when telescopic pin 8 no longer is contradicted by kicking block 6, drive telescopic pin 8 through No. two spring 26's elasticity and reset, finally make seal valve plate 7 seal corresponding branch pipe 3 again.

In order to reveal how the top block 6 cooperates with the telescopic pin 8 with a wedge, the following features are provided:

The ejector block 6 is conical, the small caliber end of the ejector block 6 faces upwards, the large caliber end of the ejector block 6 is fixedly connected with the top of the valve pin 5 in a coaxial way, the outer diameter of the valve pin 5 is smaller than the inner diameter of the cylindrical chute 17, an inclined surface 28 which faces upwards is formed on one side of each rectangular end 24 in the cylindrical chute 17, and the conical surface of the ejector block 6 faces upwards and is in contact with the inclined surface 28, so that the rectangular ends 24 are pushed to slide inwards.

Referring to fig. 4 and 5, after the valve pin 5 rises, the valve pin 5 drives the top block 6 to collide with the rectangular end head 24 located below, in this process, the inclined surface 28 on the rectangular end head 24 is attached to the conical surface on the top block 6, then after the rectangular end head 24 rises gradually, the rectangular end head 24 is pushed by the top block 6 to slide inwards, meanwhile, the shaft body 23 drives the sealing valve plate 7 to open the corresponding branch pipe 3, and thereafter the refrigerator is communicated with the outside, the internal and external air pressures of the refrigerator are balanced gradually, if the internal and external air pressures of the refrigerator are balanced at a relatively high speed, the air pressure applied to the valve pin 5 by the external air pressure is gradually reduced, the valve pin 5 is not raised any more, and when the internal and external air pressures of the refrigerator are balanced, the valve pin 5 is reset through the first spring 20.

If the speed of the balance of the air pressure inside and outside the refrigerator is slower, the valve pin 5 can be driven by the external air pressure to continuously rise, the top block 6 can finally cross the rectangular end head 24, the rectangular end head 24 is not impacted by the top block 6, the rectangular end head 24 can be reset through the second spring 26, at the moment, the rectangular end head 24 can stretch into the cylindrical chute 17 again, the top block 6 can be erected on the top of the rectangular end head 24, at the moment, the displacement of the top block 6 is limited through the rectangular end head 24, and the top block 6 cannot descend due to the elastic force of the first spring 20. After that, when the air pressure difference between the inside and the outside of the refrigerator is increased again, the external air pressure can be secondarily pressed to the elastic diaphragm 4, the valve pin 5 can drive the top block 6 to secondarily rise, and then the top block 6 can abut against the rectangular end 24 positioned above, so that the other branch pipe 3 with larger caliber is finally opened.

In order to reveal how the top block 6 is reset, the following features are provided:

The upper end of valve pin 5 is coaxial to be equipped with narrow axle 29, and kicking block 6 links firmly with the coaxial axle 29, and the below of kicking block 6 is equipped with a coaxial cover and locates the movable block 30 on the narrow axle 29, and movable block 30 is unanimous and be the symmetry state with kicking block 6 structure, is located the shaping of rectangular end 24 of below and has a downward conflict face 31 of slope, and conflict face 31 is used for contradicting with the conical surface on the movable block 30.

When the top block 6 rises for the second time, the movable block 30 located below the top block 6 gradually approaches the rectangular end 24 located below, in this process, the large-caliber end of the movable block 30 abuts against the inclined surface 28 of the rectangular end 24, so that the rectangular end 24 slides inwards again, when the large-caliber end of the movable block 30 passes over the inclined surface 28, the abutting surface 31 on the rectangular end 24 abuts against the conical surface on the movable block 30, and at this time, the rectangular end 24 compresses the movable block 30 through the elastic force of the second spring 26.

Meanwhile, the top block 6 will rise to collide with the rectangular end 24 located above, and finally, the two telescopic pins 8 are in the outward sliding state, the two sealing valve plates 7 open the two branch pipes 3 respectively, so that the external air enters the refrigerator, after the internal air pressure and the external air pressure of the refrigerator are balanced, the air pressure acting on the elastic diaphragm 4 weakens, the elastic diaphragm 4 is reset downwards through the first spring 20, the valve pin 5 can drive the top block 6 to descend, and in the process that the valve pin 5 drives the top block 6 to descend, the movable block 30 is clamped by the rectangular end 24 located below, so that after the bottom surface of the top block 6 descends to be attached to the top surface of the movable block 30, the movable block 30 is driven by the top block 6 to descend. In this process, the rectangular end 24 located below is retracted by the collision of the tapered wall of the movable block 30, and when the top block 6 descends to the rectangular end 24 located below, the rectangular end 24 slides from the tapered wall of the movable block 30 to the tapered wall of the top block 6, so that the top block 6 can slide down over the rectangular end 24 to be reset.

In order to limit the ascending travel of the top block 6, the following features are provided:

The top of the cylindrical valve body 10 is fixedly provided with a vertically arranged internal thread sleeve 32, an adjusting bolt 33 is screwed in the internal thread sleeve 32, and the lower end of the adjusting bolt 33 extends downwards into the cylindrical chute 17.

In order to prevent the top block 6 from crossing the rectangular end 24 located above in the ascending process, finally, the situation that the top block 6 cannot descend is caused, an adjusting bolt 33 for limiting the ascending travel of the top block 6 is arranged at the top of the cylindrical valve body 10, the lower end of the adjusting bolt 33 is lifted by rotating the adjusting bolt 33, when the top block 6 ascends to be in contact with the adjusting bolt 33, the top block 6 cannot ascend again, at this time, the top block 6 is in contact with the rectangular end 24 located above, the movable block 30 is in contact with the rectangular end 24 located below, and finally, the two sealing valve plates 7 can respectively open the two branch pipes 3, so that the amount of external air entering the refrigerator is enlarged.

When the valve pin 5 can not rise, the external air pressure only extrudes the elastic diaphragm 4 to deform the elastic diaphragm, and the air pressure acted on the elastic diaphragm 4 by the external air pressure gradually becomes smaller along with the approach of the internal air pressure and the external air pressure of the refrigerator, and the elastic diaphragm 4 can not be extruded by the air pressure all the time, so that the situation that the elastic diaphragm 4 is crushed by the air pressure can not occur.

In order to ensure that the elastic membrane 4 is initially in a horizontal state, the following features are provided:

the first column-shaped air groove 13 is internally and fixedly provided with a vertically arranged supporting column 34, and when the round pressing plate 19 positioned below is in contact with the top of the supporting column 34, the elastic diaphragm 4 is in a horizontal state.

Initially, since the elastic membrane 4 is subjected to the elastic force exerted by the first spring 20, the center of the elastic membrane 4 is in a falling state, and after a long time, the elasticity of the elastic membrane 4 is weakened, and the normal deformation of the elastic membrane 4 is finally affected, a supporting column 34 is installed in the first cylindrical air groove 13, and the elastic membrane 4 is supported upwards by the supporting column, so that the elastic membrane 4 is ensured to be horizontal in the initial state, the elastic membrane 4 is further prevented from being in the falling state all the time, and the service life of the elastic membrane 4 is prolonged.

Working principle:

When the device is used, the first refrigerator connector 2 on the vent valve 1 is connected with a refrigerator, and in an initial state, two sealing valve plates 7 in the valve mechanism respectively plug the two branch pipes 3, so that the refrigerator is not communicated with the outside. When the temperature in the refrigerator continuously drops, the pressure difference between the inside and the outside of the refrigerator is gradually increased, when the external air pressure is larger than the elastic force of the first elastic piece, the external air pressure can push the elastic diaphragm 4 upwards, the elastic diaphragm 4 can overcome the elastic force of the first elastic piece to drive the valve pin 5 to rise, and the valve pin 5 can drive the jacking block 6 to be close to the telescopic pin 8 positioned below after rising.

After the kicking block 6 contacts with the telescopic pin 8 that is located the below, the two passes through the slide wedge cooperation, and telescopic pin 8 can be promoted outwards to slide, finally drives sealed valve plate 7 and opens the valve that corresponds, and the freezer is inside and outside to be linked together this moment, and external gas can continuously get into in the freezer, and the atmospheric pressure in the freezer can approach unanimously gradually, at the in-process that valve pin 5 risees, if the internal and external atmospheric pressure of freezer balances the speed is faster, external atmospheric pressure is exerted in the atmospheric pressure of valve pin 5 and can be reduced gradually, and valve pin 5 no longer rises, and when the internal and external atmospheric pressure of freezer balances, valve pin 5 can reset through an elastic component.

If the speed of the balance of the air pressure inside and outside the refrigerator is slower, the valve pin 5 can be driven by the external air pressure to continuously rise, in the process, once the ejector block 6 passes through the corresponding telescopic pin 8, the telescopic pin 8 is not interfered by the ejector block 6, the telescopic pin 8 can be reset through the second elastic piece, the branch pipe 3 which is in the opening state at present can be plugged by the corresponding sealing valve plate 7 again, the refrigerator is not communicated with the outside again, the ejector block 6 is supported by the telescopic pin 8 which is positioned below at the moment, the elastic diaphragm 4 is in the jacking state, after the air pressure difference is generated inside and outside the refrigerator again, the external air pressure can act on the elastic diaphragm 4 again, and because the elastic diaphragm 4 is in the jacking state at the moment, the external air pressure can drive the elastic diaphragm 4 to rise again only when the air pressure difference inside and outside the refrigerator is larger.

When valve pin 5 secondary rises, valve pin 5 can contact with the telescopic pin 8 that is located the top, telescopic pin 8 that is located the top can be contradicted by valve pin 5 and slide to finally drive sealed valve plate 7 and open branch pipe 3 that will correspond, then external atmospheric pressure can get into the freezer again in, during the actual processing, the bore of branch pipe 3 that the secondary was opened is greater than the bore of branch pipe 3 that the first opened, consequently a large amount of atmospheric pressure can get into the freezer in, finally compensate the inside and outside great atmospheric pressure difference of freezer, in sum up, when the freezer carries out the atmospheric pressure balance, can be according to the size of the inside and outside atmospheric pressure difference automatic control entering freezer through this device gas volume, reduce the load of freezer relatively.

Claims (6)

1. An air pressure balance valve of a refrigerator, which is characterized in that: the refrigerator comprises a ventilation valve (1) and a regulating valve, wherein a first refrigerator connector (2) and two branch pipes (3) are arranged on the ventilation valve (1), the first refrigerator connector (2) is directly connected with a refrigerator, the refrigerator is communicated with the inside and the outside through the two branch pipes (3), the regulating valve is arranged on the ventilation valve (1), the regulating valve comprises a regulating valve body, an air pressure jacking mechanism and two groups of valve mechanisms, and the air pressure jacking mechanism is arranged in the lower half part of the regulating valve body;

The pneumatic jacking mechanism comprises an elastic diaphragm (4), a valve pin (5), a first elastic piece and a jacking block (6), wherein the valve pin (5) is vertically arranged and connected with the elastic diaphragm (4), the jacking block (6) is fixedly arranged at the top of the valve pin (5), each group of valve mechanisms comprises a sealing valve plate (7) and an elastic telescopic mechanism, the elastic telescopic mechanism comprises a second elastic piece and a telescopic pin (8), the telescopic pin (8) is horizontally arranged and connected with the upper half part of the regulating valve body in a sliding manner, and the sealing valve plate (7) is connected with the telescopic pin (8);

The two telescopic pins (8) are vertically distributed, the two sealing valve plates (7) are respectively covered on the two branch pipes (3), the elastic diaphragm (4) drives the valve pins (5) to ascend through the air pressure difference inside and outside the refrigerator, the jacking blocks (6) are matched with the inclined wedges at the ends of the corresponding telescopic pins (8), the corresponding branch pipes (3) are opened by driving the sealing valve plates (7) through the horizontal sliding of the telescopic pins (8), the first elastic piece is used for resetting the valve pins (5), and the second elastic piece is used for resetting the telescopic pins (8);

The top block (6) is conical, the small caliber end of the top block (6) faces upwards, the large caliber end of the top block (6) is coaxially and fixedly connected with the top of the valve pin (5), the outer diameter of the valve pin (5) is smaller than the inner diameter of the cylindrical chute (17), an inclined surface (28) which inclines upwards is formed on one side, facing the cylindrical chute (17), of each rectangular end (24), and the conical surface of the top block (6) faces upwards and is in contact with the inclined surface (28), so that the rectangular end (24) is pushed to slide inwards;

The upper end of valve pin (5) is coaxial to be equipped with narrow axle (29), and kicking block (6) link firmly with narrow axle (29) is coaxial, and the below of kicking block (6) is equipped with a coaxial cover and locates movable block (30) on narrow axle (29), and movable block (30) are unanimous and be the symmetry state with kicking block (6) structure, and the shaping has a decurrent conflict face (31) of slope on rectangular end (24) that are located the below, and conflict face (31) are used for contradicting with the conical surface on movable block (30).

2. The refrigerator air pressure balance valve of claim 1, wherein: the air vent valve (1) is rectangular, an air vent cavity (9) is arranged in the air vent valve (1), the first refrigerator interface (2) and the two branch pipes (3) are respectively arranged on three side walls of the air vent valve (1), the first refrigerator interface (2) and the two branch pipes (3) are communicated with the air vent cavity (9), and the regulating valve body comprises a cylindrical valve body (10), a first valve seat (11) and a second valve seat (12);

The valve seat I (11) and the valve seat II (12) are rectangular, the valve seat I (11) is fixedly arranged at the top of the ventilation valve (1), the valve seat II (12) is fixedly arranged at the top of the valve seat I (11), a vertical cylindrical air groove I (13) is formed in the valve seat I (11), the valve seat I (13) is communicated with the top of the valve seat I (11), a vertical cylindrical air groove II (14) is formed in the valve seat II (12), the cylindrical air groove II (14) is communicated with the top and the bottom of the valve seat II (12), and the lower end of the cylindrical air groove II (14) is communicated with the upper end of the cylindrical air groove I (13);

The top of No. two disk seats (12) is located and fixed to the vertical setting of cylindricality valve body (10), the top shutoff of No. two disk seats (12) is located to the lower extreme of cylindricality valve body (10), elastic diaphragm (4) are circular, and elastic diaphragm (4) are the level and fixedly locate between disk seat (11) and No. two disk seats (12), the shaping has outer connecting pipe (15) that are linked together with No. one cylindricality air groove (13) on the outer wall of No. one disk seat (11), the shaping has No. two freezer interfaces (16) that are linked together with No. two cylindricality air groove (14) on the outer wall of No. two disk seats (12).

3. The refrigerator air pressure balance valve of claim 2, wherein: the top of cylindricality valve body (10) inwards has offered cylindricality spout (17) with elastic diaphragm (4) coaxial, valve pin (5) are located No. two cylindricality air tanks (14), through-hole (18) that supply the lower extreme coaxial of valve pin (5) passed are offered to the centre of a circle department of elastic diaphragm (4), the coaxial fixed circular clamp plate (19) that are equipped with two with elastic diaphragm (4) clamp in opposite directions of lower extreme of valve pin (5), the upper end of valve pin (5) upwards passes cylindricality valve body (10) and stretches into in cylindricality spout (17), no. one elastic component is for locating No. two cylindricality air tanks (14) and cover locates No. one spring (20) on valve pin (5), the both ends of No. one spring (20) are inconsistent with the bottom of cylindricality valve body (10) and the circular clamp plate (19) that are located the top respectively.

4. A refrigerator air pressure balance valve according to claim 3, wherein: each elastic telescopic mechanism further comprises a strip-shaped mounting shell (21), two slots (22) which are horizontally communicated with the cylindrical sliding groove (17) are formed in the outer wall of the cylindrical valve body (10), the two slots (22) are vertically distributed at intervals, the two strip-shaped mounting shells (21) are horizontally arranged and respectively and fixedly arranged in the two slots (22), each telescopic pin (8) comprises a shaft body (23) and a rectangular end (24), a square sliding groove (25) which is horizontally arranged is formed in one end, close to the cylindrical sliding groove (17), of each strip-shaped mounting shell (21), the rectangular end (24) slides in the square sliding groove (25), and the rectangular end (24) extends into the cylindrical sliding groove (17);

The axle body (23) level sets up, the one end and the rectangle end (24) of axle body (23) link firmly, the other end of axle body (23) passes bar installation shell (21) and stretches out outside bar installation shell (21), no. two spring (26) for locating square spout (25) and cover are located on axle body (23), the both ends of No. two spring (26) are inconsistent with the inner wall of rectangle end (24) and bar installation shell (21) respectively, every sealed valve plate (7) all link firmly with the end that stretches out of corresponding axle body (23) through connecting rod (27) of vertical setting.

5. A refrigerator air pressure balance valve according to claim 3, wherein: the top of the cylindrical valve body (10) is fixedly provided with a vertically arranged internal thread sleeve (32), an adjusting bolt (33) is screwed in the internal thread sleeve (32), and the lower end of the adjusting bolt (33) downwards extends into the cylindrical chute (17).

6. A refrigerator air pressure balance valve according to claim 3, wherein: a column-shaped air groove (13) is internally and fixedly provided with a vertically arranged support column (34), and when a round pressing plate (19) positioned below is in contact with the top of the support column (34), the elastic diaphragm (4) is in a horizontal state.