CN213954482U

CN213954482U - Stop valve and air conditioner of low flow resistance

Info

Publication number: CN213954482U
Application number: CN202022018741.6U
Authority: CN
Inventors: 黄德宝; 盘玮; 何庆伟
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-08-13
Anticipated expiration: 2030-09-15

Abstract

The utility model relates to an air conditioner stop valve technical field, concretely relates to stop valve and air conditioner of low flow resistance, the stop valve of low flow resistance includes the main valve body, first intercommunication mouth of pipe, second intercommunication mouth of pipe, check valve core, valve rod, upper cover nut, and first connection mouth of pipe's axis is the obtuse angle with the orificial axis contained angle of second intercommunication, and the outer wall of valve rod is provided with the recess, and the valve rod is provided with interior recess towards the orificial one end of first intercommunication. The utility model changes the flow direction of the fluid by changing the included angle between the first communicating pipe orifice and the second communicating pipe orifice, effectively reduces the flow resistance, and slows down the flash condition caused by sudden pressure drop; the concave part increases the flowing space, thereby increasing the flow, reducing the flowing resistance of the air conditioner running on the stop valve and reducing the flash gas, and achieving the purpose of improving the efficiency of the air conditioner; the groove increases the air circulation space of the stop valve in a closed state, reduces the flow resistance and accelerates the efficiency of the vacuumizing process.

Description

Stop valve and air conditioner of low flow resistance

Technical Field

The utility model relates to an air conditioner stop valve technical field, concretely relates to stop valve and air conditioner of low flow resistance.

Background

Air conditioners (Air conditioners) are Air conditioners. The device is used for manually regulating and controlling parameters such as temperature, humidity, flow rate and the like of ambient air in a building or a structure. The air conditioner generally comprises a cold source or heat source device, a cold and hot medium transmission and distribution system, a tail end device and other auxiliary equipment, and the air conditioner on the market mainly comprises a refrigeration host machine, a water pump, a fan and a pipeline system. At present, the implementation of a new national standard of air conditioner energy efficiency makes the improvement of the air conditioner effect an important task in the air conditioner industry. With the gradual elimination of the R22 refrigerant and the gradual popularization of the R32 refrigerant, the R32 has the condition that the working flow is low, the refrigerant is easy to generate flash gas and vortex flow at the positions of high flow resistance, sudden pressure drop and the like, and the pipeline flow and the refrigerating capacity are influenced. The stop valve is one of the most widely used valves, has small friction force between sealing surfaces in the opening and closing process, is durable, is convenient to maintain, is suitable for medium and low pressure and high pressure, and is widely applied to pipelines of air conditioners. At present, in order to solve the problems that R32 refrigerant is easy to generate flash gas and swirl flow at the positions of large flow resistance, sudden pressure drop and the like, a mode of adding a groove body in a valve body of an air conditioner stop valve is adopted to increase the flow space in the valve body, but due to the thickness limitation of the valve body, the increased space is limited, and an inlet and an outlet of a stop valve structure for an air conditioner are crossed at a right angle, so that the flow resistance is larger.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a stop valve of low flow resistance still provides an air conditioner including the aforesaid stop valve of low flow resistance.

The utility model discloses a following scheme realizes:

a stop valve with low flow resistance comprises a main valve body, a first communicating pipe orifice arranged at one end of the main valve body, a second communicating pipe orifice arranged on the side wall of the main valve body, a check valve core arranged on the side wall of the main valve body, a valve rod arranged in the main valve body and used for sealing the first communicating pipe orifice, and an upper cover nut arranged at the other end of the main valve body opposite to the first communicating pipe orifice, wherein an included angle between the central axis of the first connecting pipe orifice and the central axis of the second communicating pipe orifice is an obtuse angle; the outer wall of the valve rod is provided with a groove; one end of the valve rod, which faces the first communicating pipe orifice, is provided with an inward concave part.

Furthermore, the outer wall of the valve rod is sleeved with an O-shaped ring, and the O-shaped ring is in interference fit with the inner wall of the main valve body.

Further, the outer wall of the valve rod is further provided with a mounting groove for mounting the O-shaped ring, and the position of the mounting groove is close to the end part, far away from the first communicating pipe orifice, of the valve rod.

Further, the inner recess is cylindrical.

Furthermore, the included angle between the central axis of the first connecting pipe orifice and the central axis of the second connecting pipe orifice is 130-140 degrees.

Further, the valve rod is connected with the inner wall of the main valve body through threads.

Furthermore, one end, far away from the first communicating pipe orifice, of the valve rod is provided with an inner hexagonal concave hole.

Furthermore, the first communicating pipe orifice and the second communicating pipe orifice are both provided with connecting pipes.

An air conditioner comprises the stop valve with low flow resistance.

Contrast prior art, the utility model discloses following beneficial effect has:

the utility model discloses a change the orificial contained angle of first intercommunication mouth of pipe and second intercommunication, changed fluidic flow direction, reduced vortex district area effectively and slowed down the binary stream to reduce the flow resistance, slow down because the pressure suddenly falls and leads to the refrigerant flash condition. The flow space is increased by the concave part at the bottom of the valve rod, and the flow of the valve body is increased, so that the flow resistance of the stop valve is reduced when the air conditioner operates, flash gas is reduced, and the aim of improving the efficiency of the air conditioner is fulfilled. The lateral wall of valve rod has set up the recess, and the circulation of air space when can increase the stop valve and be in the closed condition reduces the flow resistance for the efficiency of after sales installation evacuation, guarantees safe, reliable of air conditioner operation process. The arrangement of the inner concave part and the groove can also reduce production materials and production cost, the arrangement of the groove shortens the thread length of the valve rod, and the processing difficulty is reduced.

Drawings

Fig. 1 is the utility model provides a pair of stop valve of low flow resistance's structural schematic diagram, be the stop valve for the open mode under this state.

Fig. 2 is a schematic structural diagram of the valve rod of the present invention.

Fig. 3 is a schematic view of the closed state of the present invention.

The figure includes:

the main valve body 1, the first communicating pipe orifice 2, the second communicating pipe orifice 3, the check valve core 4, the valve rod 5, the groove 51, the inner concave part 52, the mounting groove 53, the inner hexagonal concave hole 54, the upper cover nut 6, the O-shaped ring 7 and the connecting pipe 8.

Detailed Description

To facilitate understanding of the present invention for those skilled in the art, the present invention will be described in further detail with reference to the following detailed description and accompanying drawings.

Referring to fig. 1 to 3, the utility model provides a pair of stop valve of low flow resistance, including the main valve body 1, set up in the first intercommunication mouth of pipe 2 of the main valve body 1 one end, set up in the second intercommunication mouth of pipe 3 of the main valve body 1 lateral wall sets up the non return valve core 4 of the main valve body 1 lateral wall, set up in being used for in the main valve body 1 seals the valve rod 5 of first intercommunication mouth of pipe 2 sets up the main valve body 1 is for the upper cover nut 6 of the other end of first intercommunication mouth of pipe 2, the axis of 8 mouths of first connecting pipe with the axis contained angle of second intercommunication mouth of pipe 3 is the obtuse angle. The outer wall of valve rod 5 is provided with recess 51, and recess 51 can increase the circulation of air space when the stop valve is in the closed condition, reduces the flow resistance for after sales installation evacuation process efficiency guarantees safe, reliable among the air conditioner operation process. During the concrete implementation, after the connection of the internal unit and the external unit of the air conditioner is completed, a large amount of air exists in the internal unit and the connecting pipe 8, and the internal unit and the connecting pipe can be operated and used only after the stop valve is closed and vacuumized through the check valve core 4.

The end of the valve rod 5 facing the first communication pipe orifice 2 is provided with an internal recess 52, and in this embodiment, the internal recess 52 is cylindrical, and may have other shapes in specific implementation. The concave portion 52 increases the flowing space in the stop valve cavity during the operation of the air conditioner, thereby reducing the flowing resistance and pressure drop of the stop valve during the operation of the air conditioner, reducing flash gas and achieving the purpose of improving the efficiency of the air conditioner. The way of reducing the fluid resistance is to reduce the local resistance coefficient and reduce the on-way resistance coefficient, the concave part 52 increases the flowing space mainly to reduce the on-way resistance coefficient, the flowing space becomes larger, which is equivalent to the increase of the equivalent diameter of the stop valve, the on-way resistance coefficient is inversely proportional to the equivalent diameter, namely the larger the equivalent diameter is, the smaller the on-way resistance coefficient of the fluid is, thereby achieving the purpose of reducing the resistance.

The outer wall of the valve rod 5 is sleeved with an O-shaped ring 7, and the O-shaped ring 7 is in interference fit with the inner wall of the main valve body 1. The outer wall of the valve rod 5 is further provided with a mounting groove 53 for mounting the O-shaped ring 7, and the mounting groove 53 is close to the end part, far away from the first communication pipe orifice 2, of the valve rod 5. The O-shaped ring 7 is sleeved in the mounting groove 53, and the O-shaped ring 7 is in interference fit with the inner wall of the main valve body 1, so that good sealing can be formed between the main valve bodies 1 of the O-shaped ring 7.

The included angle between the central axis of the first connecting pipe 8 and the central axis of the second connecting pipe 3 is 130-140 degrees. According to the related content of hydrodynamics, compared with the fact that the intersection of the inlet and outlet axes of the existing structure is a right angle, the effect of reducing the resistance coefficient of the bend angle can be achieved at the included angle of 91-180 degrees, but the effect of reducing the treatment coefficient is relatively small at the included angle of 91-120 degrees, and if the included angle is larger than 140 degrees, the problem is large for the production side and is difficult to achieve. Therefore, the included angle of 130-140 degrees is a relatively reasonable range. In this embodiment, an included angle between a central axis of the first connecting pipe 8 and a central axis of the second connecting pipe 3 is set to be 135 °. The smaller the ratio of the radius of curvature (R) to the tube diameter (d), the smaller the fluid flow resistance. The curvature radius refers to the radius of a circle tangent to the inlet pipe and the outlet pipe of the valve body (i.e. the radius of a circle tangent to the first communicating pipe orifice and the second communicating pipe orifice in the embodiment); the reason for this concept is indicated here as follows: the local fluid resistance coefficient is not only influenced by the included angle of the inlet pipe and the outlet pipe of the valve body, but also influenced by the R/d. And the R/d is taken as a constant, so that the influence degree of the included angle between the inlet pipe and the outlet pipe of the valve body on the actual fluid resistance is reflected. Taking R/d =1 as an example, the flow resistance coefficient can be reduced from 0.246 to 0.1 after improvement, and the fluid resistance is reduced by about 59.3%.

The valve rod 5 is connected with the inner wall of the main valve body 1 through threads. The valve rod 5 is far away from one end of the first communicating pipe orifice 2 is provided with an inner hexagonal concave hole 54, the inner hexagonal concave hole 54 can be inserted by a rotary tool, and the rotary valve rod 5 is opened and closed. In this embodiment, the end of the valve stem 5 has a chamfered surface, and when in the closed state, the chamfered surface contacts with the convex part of the inner wall of the valve body, and a torque is applied by rotating the valve stem 5 with a rotating tool (the specific torque value is set according to the actual use requirement), so that the valve stem 5 and the inner wall of the main valve body 1 are slightly deformed by compression, and a good hard seal is formed.

The first communicating pipe port 2 and the second communicating pipe port 3 are both provided with connecting pipes 8 for connecting other pipelines of the air conditioning system.

The utility model also provides an air conditioner, including aforementioned stop valve of low flow resistance.

In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the included claims.

Claims

1. A stop valve with low flow resistance comprises a main valve body, a first communicating pipe orifice arranged at one end of the main valve body, a second communicating pipe orifice arranged on the side wall of the main valve body, a check valve core arranged on the side wall of the main valve body, a valve rod arranged in the main valve body and used for sealing the first communicating pipe orifice, and an upper cover nut arranged at the other end of the main valve body opposite to the first communicating pipe orifice, wherein an included angle between the central axis of the first connecting pipe orifice and the central axis of the second communicating pipe orifice is an obtuse angle; the outer wall of the valve rod is provided with a groove; one end of the valve rod, which faces the first communicating pipe orifice, is provided with an inward concave part.

2. The low flow resistance stop valve of claim 1, wherein an O-ring is sleeved on the outer wall of the valve stem, and the O-ring is in interference fit with the inner wall of the main valve body.

3. The low flow resistance shut-off valve of claim 2, wherein the outer wall of said valve stem is further provided with a mounting groove for mounting said O-ring, said mounting groove being located near the end of said valve stem remote from said first communication port.

4. The low flow resistance shut-off valve of claim 1, wherein the internal recess is cylindrical.

5. The low flow resistance shut-off valve of claim 1, wherein the angle between the central axis of the first connecting nozzle and the central axis of the second connecting nozzle is 130 ° to 140 °.

6. The low flow resistance shut-off valve of claim 1, wherein the stem is threadably engaged with the inner wall of the main valve body.

7. The low flow resistance stop valve of claim 1, wherein the end of the valve stem remote from the first communicating nozzle is provided with a hexagonal socket.

8. The low flow resistance shut-off valve according to claim 1, wherein the first and second communication nozzles are each provided with a connection pipe.

9. An air conditioner characterized by comprising the low flow resistance shut-off valve according to any one of claims 1 to 8.