Double-inlet constant-outlet rectifying valve

Abstract

The invention relates to a double-inlet constant-outlet rectifying valve applied to the technical field of refrigeration, and provides a valve device which does not need to be controlled by electric power and can be automatically switched for loop switching of refrigerants in a refrigeration and heating circulation system, and the refrigerants can finally flow out through a constant-outlet pipe no matter the refrigerants flow out of a condenser or an evaporator and enter a valve shell. After passing through the throttling of the one-way expansion valve and the power device in sequence, the refrigerant enters the valve shell through the constant inlet pipe, the double-inlet constant-outlet effect of the rectifying valve is achieved, the rectifying valve is applied to a refrigerating and heating circulating system, multiple valves can be replaced for use, electric control is not needed, switching of refrigerant flowing loops is automatically achieved, and the working efficiency is improved. Therefore, the material cost and the electric power cost of the valve in a refrigerating and heating circulating system are greatly reduced.

Description

Technical Field

[0001] The present invention relates to a rectifying valve, and particularly to a double-inlet constant-outlet rectifying valve applied to the refrigeration technology field. Background Art

[0002] A valve is a pipeline accessory used to open and close pipelines, control the flow direction, and adjust and control parameters of the transported medium (temperature, pressure, and flow rate). According to its functions, it can be divided into shut-off valves, check valves, regulating valves, etc. Of course, valves are also indispensable in a circulating refrigeration (heating) system.

[0003] The specification of Chinese Patent CN103423482B discloses a four-way valve for R32 refrigerant and an air conditioner, including: a main valve body, in which a valve chamber is provided, a valve core is provided in the valve chamber, the valve core divides both ends of the valve chamber into independent first and second valve chambers, the valve core includes a valve seat and a slider, the slider is slidably arranged on the valve seat, and the valve seat is fixed on the main valve body; a plurality of connecting pipes, all communicating with the valve chamber of the main valve body, the connecting pipes include: an E connecting pipe, an S connecting pipe, a C connecting pipe, and a D connecting pipe, and the inner diameters of the E connecting pipe, the S connecting pipe, and the C connecting pipe are all between 5.0 and 7.0 millimeters; the inner diameter of the D connecting pipe is between 3.2 and 5.5 millimeters. The present invention can effectively reduce the problem of internal leakage of the four-way valve in the prior art.

[0004] The specification of Chinese Patent CN103423482B discloses a multi-way valve for controlling a refrigerant circuit, having a housing; having a first inlet opening connected to an adjustment chamber located in the housing through a first fluid passage; having a second connection opening connected to the adjustment chamber through a second fluid passage; having at least one additional connection opening connected to the adjustment chamber through at least one additional fluid passage; having an actuator for actuating a transmission element by a drive motor, the actuator extending in the housing between the drive motor and the adjustment chamber; having a rotary valve assembly arranged in the adjustment chamber, the rotary valve assembly being coupled to the transmission element and being drivable to a plurality of successive and different switching or control positions between the inlet opening and the connection opening by the rotational movement of the transmission element about its longitudinal axis.

[0005] When the existing air-conditioning system switches between refrigeration and heating, most of them need to use multiple valves to achieve the switching of the refrigerant circuit. There are also cases where a single valve is used to switch the refrigerant flow direction, but they are all complex in structure and need to be used in conjunction with the power system, resulting in a high cost. Summary of the Invention

[0006] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is that when the existing refrigeration (heating) cycle system switches the refrigerant circuit, it requires the cooperation of multiple valves or is controlled by electricity, with a complex switching procedure and a high cost.

[0007] To solve the above problems, the present invention provides a double-inlet and constant-outlet rectifying valve, which includes a valve housing. A first double-flow pipe and a second double-flow pipe are respectively fixedly connected to the left and right ends of the valve housing. A constant-outlet pipe and a constant-inlet pipe are respectively fixedly connected to the upper and lower ends of the valve housing. A return-shaped cavity is formed at the central position inside the valve housing. The first double-flow pipe, the second double-flow pipe, the constant-outlet pipe, and the constant-inlet pipe all extend into the valve housing and communicate with the return-shaped cavity. Multiple installation holes communicating with the return-shaped cavity are also formed inside the valve housing, and flow control components are connected inside the installation holes.

[0008] The flow control components include spheres, compression springs, and end heads linearly distributed inside the installation holes. The spheres are located on the side close to the return-shaped cavity, the end heads are fixedly connected to the inner wall of the installation holes, the compression springs are arranged between the spheres and the end heads and abut against both of them. Under the elastic force of the compression springs, multiple spheres are respectively in close contact with the inner walls at multiple corners of the return-shaped cavity, realizing the blocking of the corner positions of the return-shaped cavity.

[0009] As a further supplement to this application, a pair of flow control components located on the upper side of the return-shaped cavity are vertically distributed, and a pair of flow control components located on the lower side of the return-shaped cavity are horizontally distributed.

[0010] As another improvement to this application, an inner cavity located inside the return-shaped cavity is also formed at the central position inside the valve housing. Multiple branch cavities communicating with the return-shaped cavity are formed on the inner wall of the inner cavity, and the multiple branch cavities are respectively oriented towards multiple corner positions of the return-shaped cavity.

[0011] As a supplementary improvement to this application, a piston and a pair of positioning rings are arranged inside the branch cavity. The positioning rings are fixedly connected to the inner wall of the branch cavity. The piston is located between the pair of positioning rings and is slidably connected inside the branch cavity.

[0012] As a supplementary improvement to this application, a branch pipe is fixedly connected to the back of the valve housing. The branch pipe fixedly penetrates the valve housing and communicates with the inner cavity. A single-port cylinder is connected to the end of the branch pipe away from the valve housing. An annular groove is formed at the cylindrical outer end of the single-port cylinder. An elastic sleeve is arranged inside the annular groove, and the edge end of the elastic sleeve is fixedly connected to the inner wall of the annular groove. Multiple air holes communicating with the inside of the single-port cylinder are formed on the inner wall of the annular groove, and the elastic sleeve covers the outside of the orifices of the air holes.

[0013] As a supplementary improvement to this application, a sealing ring is slidably sleeved outside the single-port cylinder. A pair of electric telescopic rods are fixedly connected between one end of the sealing ring and the outer end of the single-port cylinder. The width of the sealing ring is greater than the width of the notch of the annular groove.

[0014] As a supplementary improvement to this application, an air pump is also fixedly connected to the back of the valve housing. The inlet end of the air pump communicates with the outside. The outlet end of the air pump is fixedly connected to the single-port cylinder through an air pipe. An electric control three-way valve is fixedly installed on the air pipe. A pressure sensor is fixedly connected inside the single-port cylinder.

[0015] As another supplementary improvement of the present application, the air pump and the air pipe, as well as the branch pipe and the single-port cylinder, are all connected by flanges.

[0016] In summary, the present application provides a valve device for switching the refrigerant circuit in a refrigeration (heating) cycle system, which can automatically switch without relying on electric control. Whether the refrigerant flows out from the condenser or from the evaporator and enters the valve housing, it can finally flow out through the constant outlet pipe. After passing through the throttling of the one-way expansion valve and the power device in sequence, it then enters the valve housing through the constant inlet pipe, achieving the double-in and constant-out effect of this rectifying valve. When applied in a refrigeration (heating) cycle system, it can replace the use of multiple valves, automatically switch the refrigerant flow circuit without relying on electric control, thereby greatly reducing the material cost and electric cost of valves in the refrigeration (heating) cycle system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the first embodiment of the present application;

[0018] Figure 2 is a perspective sectional view of the first embodiment of the present application;

[0019] Figure 3 is a front structural schematic diagram of the first embodiment of the present application Figure 1 ;

[0020] Figure 4 is a structural schematic diagram of controlling the refrigerant flow in the refrigeration (heating) cycle system according to the first embodiment of the present application Figure 1 ;

[0021] Figure 5 is a structural schematic diagram of controlling the refrigerant flow in the refrigeration (heating) cycle system according to the first embodiment of the present application Figure 2 ;

[0022] Figure 6 is a structural schematic diagram of controlling the refrigerant flow in the heating cycle system according to the first embodiment of the present application Figure 1 ;

[0023] Figure 7 is a structural schematic diagram of controlling the refrigerant flow in the heating cycle system according to the first embodiment of the present application Figure 2 ;

[0024] Figure 8 is a front structural schematic diagram of the first embodiment of the present application Figure 2 ;

[0025] Figure 9 is a perspective sectional view of the second embodiment of the present application;

[0026] Figure 10Rear perspective view of the second embodiment of the present application;

[0027] Figure 11 Top view structure diagram of the second embodiment of the present application;

[0028] Figure 12 Front view structure diagram of the second embodiment of the present application when in use;

[0029] Figure 13 For Figure 12 Structure diagram of the location A in

[0030] Figure 14 Top view structure diagram of the second embodiment of the present application when in use Figure 1 ;

[0031] Figure 15 Top view structure diagram of the second embodiment of the present application when in use Figure 2 .

[0032] Explanation of the reference numerals in the figure:

[0033] 1 valve housing, 101 first double-flow pipe, 102 second double-flow pipe, 103 constant-outlet pipe, 104 constant-inlet pipe, 105 return-shaped cavity, 106 inner cavity, 107 branch cavity, 2 flow control member, 21 sphere, 22 compression spring, 23 end head, 3 piston, 4 positioning ring, 5 branch pipe, 6 single-port cylinder, 601 annular groove, 602 air hole, 7 sealing ring, 8 electric telescopic rod, 9 elastic sleeve, 10 air pump, 11 air pipe, 12 air pressure sensor. Specific embodiments

[0034] The following will describe the two embodiments of the present application in detail with reference to the accompanying drawings.

[0035] The first embodiment:

[0036] The present invention provides a double-inlet constant-outlet rectifying valve. Please refer to Figure 1 and Figure 2 , which includes a valve housing 1. The left and right ends of the valve housing 1 are respectively fixedly connected with a first double-flow pipe 101 and a second double-flow pipe 102. The upper and lower ends of the valve housing 1 are respectively fixedly connected with a constant-outlet pipe 103 and a constant-inlet pipe 104. An inner center position of the valve housing 1 is provided with a return-shaped cavity 105. The first double-flow pipe 101, the second double-flow pipe 102, the constant-outlet pipe 103, and the constant-inlet pipe 104 all extend into the valve housing 1 and are communicated with the return-shaped cavity 105. The middle main part of the return-shaped cavity 105 is in a "return" - shaped structure, and its four sides are also communicated with vertical extension channels. The first double-flow pipe 101, the second double-flow pipe 102, the constant-outlet pipe 103, and the constant-inlet pipe 104 are respectively communicated through a plurality of extension channels. A plurality of mounting holes communicated with the return-shaped cavity 105 are also provided inside the valve housing 1, and a flow control member 2 is connected inside the mounting holes.

[0037] Please refer to Figure 2 and Figure 3 The flow control member 2 includes a sphere 21, a compression spring 22, and an end 23 that are linearly distributed inside the mounting hole. The sphere 21 is located on the side close to the return cavity 105. The end 23 is fixedly connected to the inner wall of the mounting hole. The compression spring 22 is disposed between the sphere 21 and the end 23 and abuts against both of them. A pair of flow control members 2 located above the return cavity 105 are vertically distributed, and a pair of flow control members 2 located below the return cavity 105 are horizontally distributed. Under the elastic force of the compression spring 22, the plurality of spheres 21 are respectively in close contact with the inner walls at multiple corners of the return cavity 105, realizing the sealing of the corner positions of the return cavity 105.

[0038] The installation position of this rectifying valve is as Figure 4 shown. The double-flow pipe one 101 is connected to the condenser through a pipeline, the double-flow pipe two 102 is connected to the evaporator through a pipeline, the constant-out pipe 103 is connected to one end of the one-way expansion valve through a pipeline, and the other end of the one-way expansion valve is connected to the constant-in pipe 104 through a pipeline. Through the installation of this rectifying valve, whether the refrigerant enters from the double-flow pipe one 101 or from the double-flow pipe two 102 into the valve housing 1, it can finally flow through the constant-out pipe 103 to the one-way expansion valve, and then successively pass through the throttling of the one-way expansion valve and the power device, and then enter the valve housing 1 from the constant-in pipe 104, thus realizing the double-in and constant-out effect of this rectifying valve. The specific principle is as follows:

[0039] Case 1: Combining Figure 4 and Figure 5 shown, when the refrigerant enters the double-flow pipe one 101 from the condenser, the refrigerant enters the return cavity 105 through the double-flow pipe one 101. At this time, the refrigerant will flow dispersedly up and down. Among them, the refrigerant flowing downward will contact the horizontally distributed flow control member 2 on the lower side. The refrigerant directly enters the mounting hole, generating pressure on the sphere 21, so that the sphere 21 maintains a state of being in close contact with the inner wall of the corner of the return cavity 105. The refrigerant flowing here is difficult to flow further. The refrigerant flowing upward will directly generate an extrusion force on the sphere 21 on the vertically distributed flow control member 2, so that the sphere 21 compresses the compression spring 22, and the sphere 21 gradually moves away from the corner position of the return cavity 105, enabling the corner position to resume its flow function. Subsequently, the refrigerant flowing upward flows along the return cavity 105 to near the constant-out pipe 103. At this time, although part of the refrigerant flows along the return cavity 105 to another vertically distributed flow control member 2, the refrigerant will also enter the mounting hole, squeezing the sphere 21 to keep it in close contact with the inner wall of the corner of the return cavity 105, and the refrigerant is difficult to flow further. Therefore, the refrigerant entering through the double-flow pipe one 101 will finally flow into the constant-out pipe 103 through the upper left half part of the channel of the return cavity 105 and be discharged from this rectifying valve through the constant-out pipe 103;

[0040] Subsequently, the refrigerant flowing out of the constant-out pipe 103 passes through the one-way expansion valve and the power device, and then enters the return cavity 105 again through the constant-in pipe 104. At this time, the refrigerant will directly squeeze the sphere 21 on another flow control member 2 distributed horizontally, opening the channel at its corner position. Therefore, the refrigerant will flow into the double-flow pipe two 102 along the channel in the lower right half of the return cavity 105, and then enter the evaporator, and return to the condenser through the compressor, thus realizing the circulating flow of the refrigerant.

[0041] Case 2, in combination with Figure 6 and Figure 7 As shown, when the refrigerant enters the double-flow pipe two 102 from the evaporator, it will flow out of the constant-out pipe 103 along the channel in the upper right half of the return cavity 105, pass through the one-way expansion valve and the power device, and then enter the return cavity 105 again through the constant-in pipe 104. Subsequently, it flows through the double-flow pipe one 101 along the channel in the lower left half of the return cavity 105 to the condenser. The specific principle is similar to that of Case 1 and will not be repeated here. The refrigerant flow state can be referred to Figure 6 and Figure 7 .

[0042] Therefore, when this application is used in a refrigeration (heating) cycle system, it can replace the use of multiple valves to achieve the control effect of double-in and constant-out of the refrigerant. When switching between the refrigeration cycle and the heating cycle, there is no need to rely on electric control, and the switching of the refrigerant flow circuit is automatically realized, thus greatly reducing the material cost and electric cost of the valves in the refrigeration (heating) cycle system.

[0043] Supplementary note: In the initial state, the specific positions of the multiple spheres 21 in the return cavity 105 are as follows. Please refer to Figure 8 , First, the center d of the sphere 21 located on the lower left side of the return cavity 105 needs to be on the right side of the right inner wall N of the left channel of the return cavity 105, so that the pressure direction of the refrigerant flowing out of the double-flow pipe one 101 on the sphere 21 is not easily opposite to the elastic force direction of the compression spring 22. Second, the center b of the sphere 21 located on the upper right side of the return cavity 105 needs to be below the lower inner wall M of the upper channel of the return cavity 105, and its purpose is similar to the above. Third, the center c of the sphere 21 located on the lower right side of the return cavity 105 needs to be on the left side of the left inner wall E of the right channel of the return cavity 105, so that the pressure direction of the refrigerant flowing out of the double-flow pipe two 102 on the sphere 21 is not easily opposite to the elastic force direction of the compression spring 22. Fourth, the center a of the sphere 21 located on the upper left side of the return cavity 105 needs to be below the lower inner wall M of the upper channel of the return cavity 105, and its purpose is similar to the above.

[0044] The second implementation mode:

[0045] On the basis of the first embodiment, the following contents can be selectively added according to actual needs and cost considerations: Please refer to Figure 9 , an inner cavity 106 located inside the return cavity 105 is further provided at the inner center position of the valve housing 1. A plurality of branch cavities 107 communicating with the return cavity 105 are provided on the inner wall of the inner cavity 106, and the plurality of branch cavities 107 are respectively oriented towards the plurality of corner positions of the return cavity 105. A piston 3 and a pair of positioning rings 4 are provided inside the branch cavity 107. The positioning rings 4 are fixedly connected to the inner wall of the branch cavity 107. The piston 3 is located between the pair of positioning rings 4 and is slidably connected to the inside of the branch cavity 107. In the initial state, the piston 3 is close to the positioning ring 4 farther away from the inner cavity 106. When the sphere 21 fits against the inner wall of the return cavity 105, it will block the outlet of the branch cavity 107.

[0046] Please refer to Figure 10 and Figure 11 , a branch pipe 5 is fixedly connected to the back of the valve housing 1, and the branch pipe 5 fixedly penetrates the valve housing 1 and communicates with the inner cavity 106. One end of the branch pipe 5 away from the valve housing 1 is connected to a single-port cylinder 6. An annular groove 601 is provided at the cylindrical outer end of the single-port cylinder 6. An airtight elastic sleeve 9 is provided inside the annular groove 601, and the edge end of the elastic sleeve 9 is fixedly connected to the inner wall of the annular groove 601. A plurality of air holes 602 communicating with the inside of the single-port cylinder 6 are provided on the inner wall of the annular groove 601. The elastic sleeve 9 covers the outside of the orifice of the air hole 602. A sealing ring 7 is slidably sleeved outside the single-port cylinder 6. A pair of electric telescopic rods 8 are fixedly connected between one end of the sealing ring 7 and the outer end of the single-port cylinder 6. The width of the sealing ring 7 is greater than the width of the notch of the annular groove 601, so that after the sealing ring 7 is moved, the sealing ring 7 can fully cover the notch of the annular groove 601 as shown in Figure 13 . A gas pump 10 is further fixedly connected to the back of the valve housing 1. The inlet end of the gas pump 10 communicates with the outside. The outlet end of the gas pump 10 is fixedly communicated with the single-port cylinder 6 through a trachea 11, and an electric control three-way valve is fixedly installed on the trachea 11. The first interface of the electric control three-way valve faces the single-port cylinder 6, the second interface faces the gas pump 10, and both interfaces are connected to the trachea 11. The third interface communicates with the outside. In the initial state, the first and second interfaces are connected, so that the single-port cylinder 6, the trachea 11 and the gas pump 10 are connected. A pressure sensor 12 is fixedly connected inside the single-port cylinder 6.

[0047] During the use of this rectifying valve, due to the problem that the compression spring 22 is prone to a decrease in elasticity after long-term use, it is difficult for the sphere 21 to closely fit the inner wall of the corner of the return cavity 105 in the initial state, making it difficult to block the corner position. When the refrigerant enters the return cavity 105 through the first double-flow pipe 101 or the second double-flow pipe 102, part of the refrigerant is likely to form multi-directional flow in the return cavity 105, that is: the refrigerant entering the return cavity 105 not only flows to the vicinity of the constant outlet pipe 103, but also easily seeps to the vicinity of the constant inlet pipe 104, and mixes with the refrigerant flowing into the return cavity 105 from the constant inlet pipe 104 later, resulting in disordered refrigerant flow and easily affecting the normal use of the entire refrigeration (heating) cycle system. Therefore, based on this problem, in this embodiment, through the addition of the above structure, a detection means is provided for the fitting state between the sphere 21 and the return cavity 105, specifically as follows:

[0048] Combined Figure 12 with Figure 13 As shown, taking the refrigerant entering from the first double-flow pipe 101 as an example, under normal circumstances: the refrigerant will flow along the upper left half channel of the return cavity 105 to the vicinity of the constant outlet pipe 103 and be discharged. After passing through the one-way expansion valve and the power device, it then enters the return cavity 105 through the constant inlet pipe 104, and then flows along the lower right half channel of the return cavity 105 to the second double-flow pipe 102 and is discharged. Since the spheres 21 on the upper left side and the lower right side are separated from the corners of the return cavity 105, part of the refrigerant will enter the corresponding branch cavity 107, exert pressure on the piston 3 until the piston 3 is stuck into the positioning ring 4 close to the inner cavity 106, while the spheres 21 on the lower left side and the upper right side still maintain a state of closely fitting with the return cavity 105, making it difficult for the refrigerant to seep into the corresponding branch cavity 107, and the piston 3 in this branch cavity 107 can remain in place. Record the air pressure data monitored by the air pressure sensor 12 under normal circumstances; when the sphere 21 on the lower left side or the upper right side does not fit closely with the inner wall of the return cavity 105 and there is a gap between them, to a certain extent, this also indicates a problem with the elastic performance of the compression spring 22 that provides pressure for the sphere 21. At this time, the refrigerant will enter the branch cavity 107 through the gap, push the piston 3 towards the inner cavity 106 direction, and the movement of the piston 3 will push the gas, increasing the air pressure in the inner cavity 106. Subsequently, too much gas enters the single-port cylinder 6 through the branch pipe 5 (combined Figure 14 As shown), prompting the elastic sleeve 9 to expand outwards, and the air pressure data monitored by the air pressure sensor 12 increases significantly. Therefore, the change in the data of the air pressure sensor 12 can effectively reflect the position state of the sphere 21 and the performance of the compression spring 22.

[0049] The ways to restore the piston 3 to its original position are as follows: Step 1, turn off the operation of the air-conditioning cooling and heating, and then start the electronically controlled three-way valve on the air pipe 11 to connect the first interface and the third interface, so that the excessive gas inside the single-port cylinder 6 is released to the outside, the elastic sleeve 9 loses air and shrinks, and gradually approaches the inner wall of the annular groove 601, changing from the state shown by Figure 14 to the state shown by Figure 11 . Step 2, start the electric telescopic rod 8 to push the sealing ring 7 to the outside of the annular groove 601 to block the notch of the annular groove 601. Step 3, start the electronically controlled three-way valve again to connect the first and second interfaces, that is, connect the air pump 10, the air pipe 11 and the single-port cylinder 6. Step 4, please refer to Figure 15 . Start the air pump 10 to slowly input air into the single-port cylinder 6. The gradually increasing air pressure will enter the inner cavity 106 and the branch cavity 107, prompting the piston 3 to move towards the return cavity 105 until it reaches the positioning ring 4 (Supplementary note: In Step 4, the elastic sleeve 9 will also expand to a certain extent. However, due to the presence of the sealing ring 7, the expansion of the elastic sleeve 9 is restricted. Therefore, the expansion degree of the elastic sleeve 9 is very small and does not affect its subsequent continued expansion during the detection process; when the piston 3 returns to its original position, it will push the refrigerant in the branch cavity 107 into the return cavity 105, opening a gap between the sphere 21 and the return cavity 105, and most of the refrigerant will return to the return cavity 105).

[0050] The inner diameter of the branch cavity 107 is small, and the content of the refrigerant and gas entering and leaving it is small, which neither easily affects the normal use of the refrigerant nor easily causes the elastic sleeve 9 to expand and rupture excessively.

[0051] In addition, both between the air pump 10 and the air pipe 11 and between the branch pipe 5 and the single-port cylinder 6 are connected by flanges, that is, the single-port cylinder 6 can be detached from the branch pipe 5, and the air pipe 11 can be detached from the air pump 10, so that the single-port cylinder 6 and the air pipe 11 can be removed for maintenance or replacement. Moreover, when the detection function in this embodiment does not need to be realized, the single-port cylinder 6 and the air pipe 11 can be chosen not to be installed, and an additional sealing plug can be used to seal the pipe orifice of the branch pipe 5. This rectifying valve can be used normally as in the first embodiment.

[0052] Combined with the current actual needs, the above embodiments adopted in this application, the protection scope is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. Double-inlet constant-outlet rectifier valve, characterized by: The valve housing (1) comprises a valve casing (1), wherein the left and right ends of the valve casing (1) are respectively fixedly connected with a double flow tube 1 (101) and a double flow tube 2 (102), and the upper and lower ends of the valve casing (1) are respectively fixedly connected with a constant outlet tube (103) and a constant inlet tube (104), and a return cavity (105) is provided at the center position of the interior of the valve casing (1), and the double flow tube 1 (101), the double flow tube 2 (102), the constant outlet tube (103) and the constant inlet tube (104) all extend into the interior of the valve casing (1) and communicate with the return cavity (105), and a plurality of mounting holes communicating with the return cavity (105) are also provided inside the valve casing (1), and a flow control member (2) is connected inside the mounting holes; The flow control component (2) comprises a sphere (21), a compression spring (22) and an end head (23) which are linearly distributed inside the mounting hole, and the sphere (21) is located on a side close to the round-shaped cavity (105), and the end head (23) is fixedly connected to the inner wall of the mounting hole. The compression spring (22) is arranged between the sphere (21) and the end head (23) and abuts against the two. Under the elastic force of the compression spring (22), the plurality of spheres (21) are respectively tightly fitted with the inner walls of the plurality of corners of the round-shaped cavity (105), thereby achieving the blocking of the corners of the round-shaped cavity (105).

2. The double-inlet constant-outlet rectifier valve according to claim 1 is characterized in that: The pair of flow control members (2) located on the upper side of the circular cavity (105) are in a vertical distribution state, and the pair of flow control members (2) located on the lower side of the circular cavity (105) are in a horizontal distribution state.

3. The double-inlet constant-outlet rectifier valve according to claim 1 is characterized in that: An inner cavity (106) located inside the round-shaped cavity (105) is also provided at the inner center of the valve housing (1), and a plurality of branch cavities (107) communicating with the round-shaped cavity (105) are provided on the inner wall of the inner cavity (106), and the plurality of branch cavities (107) are respectively oriented toward a plurality of corner positions of the round-shaped cavity (105).

4. The double-inlet constant-outlet rectifier valve according to claim 3 is characterized in that: A piston (3) and a pair of positioning rings (4) are provided inside the branch chamber (107). The positioning rings (4) are fixedly connected to the inner wall of the branch chamber (107). The piston (3) is located between the pair of positioning rings (4) and is slidably connected to the inside of the branch chamber (107).

5. The double-inlet constant-outlet rectifier valve according to claim 3 is characterized in that: The back of the valve housing (1) is fixedly connected to a branch pipe (5), and the branch pipe (5) is fixedly passed through the valve housing (1) and communicated with the inner cavity (106); the end of the branch pipe (5) away from the valve housing (1) is connected to a single-end tube (6); an annular groove (601) is provided at the cylindrical outer end of the single-end tube (6); an elastic sleeve (9) is provided on the inner side of the annular groove (601), and the edge end of the elastic sleeve (9) is fixedly connected to the inner wall of the annular groove (601); a plurality of air holes (602) communicating with the inside of the single-end tube (6) are provided on the inner wall of the annular groove (601); and the elastic sleeve (9) covers the outer side of the orifice of the air hole (602).

6. The double-inlet constant-outlet rectifier valve according to claim 5, characterized in that: A sealing ring (7) is slidably sleeved on the outer side of the single-end barrel (6); a pair of electric telescopic rods (8) are fixedly connected between one end of the sealing ring (7) and the outer end of the single-end barrel (6); and the width of the sealing ring (7) is greater than the slot width of the annular groove (601).

7. The double-inlet constant-outlet rectifier valve according to claim 5, characterized in that: The back of the valve housing (1) is also fixedly connected to an air pump (10), the inlet end of the air pump (10) is communicated with the outside, the outlet end of the air pump (10) is fixedly communicated with the single-mouth cylinder (6) through an air pipe (11), and an electrically controlled three-way valve is fixedly installed on the air pipe (11), and the interior of the single-mouth cylinder (6) is fixedly connected to an air pressure sensor (12).

8. The double-inlet constant-outlet rectifier valve according to claim 7, characterized in that: The air pump (10) and the air pipe (11) as well as the branch pipe (5) and the single-end cylinder (6) are connected via flanges.

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