This application claims foreign priority benefits under 35 U.S.C. ยง 119 to Chinese Patent Application No. 201921758623.X filed on Oct. 18, 2019, the content of which is hereby incorporated by reference in its entirety.
The present invention relates to a flow regulating valve and a compressor with the flow regulating valve.
Under extreme operating conditions, fluid entering a compressor sometimes contains refrigerant liquid. The liquid is incompressible and may cause mechanical damage inside the compressor. In order to solve this problem, in the prior art, generally a larger suction chamber is used or a labyrinth section is disposed in a suction path to reduce the flow rate of liquid entering the compressor. However, with these technical solutions, the compressor is usually complicated in structure, large in size and high in cost.
Therefore, it is desirable to obtain a device that effectively adjusts the flow rate of the incoming fluid with a simple structure and low cost.
The present invention has been made in order to solve the above technical problems and other potential technical problems.
In accordance with an aspect of the present invention, there is provided a flow regulating valve, characterized in that the flow regulating valve is able to form fluid inlets of different widths according to different forces exerted on the flow regulating valve by an incoming fluid.
In particular, the flow regulating valve includes a valve seat, a guide member, a piston, and a pipe. The valve seat, the piston, and the pipe form a fluid regulating passage, and the piston is movable away from or towards the valve seat along the guide member such that a narrowest section of the fluid regulating passage is changed in width and/or in position.
In particular, the flow regulating valve further includes a biasing member. Both a biasing force generated by the biasing member and the force generated by the incoming fluid act on the piston such that the piston is moved along the guide member and finally reaches an equilibrium state.
In particular, the width of the narrowest section of the fluid regulating passage is determined by the piston and the valve seat or by the piston and the pipe.
In particular, the guide member is independent of the piston and the valve seat, or the guide member and the piston are an integral member formed by an integrally molding process, or the guide member and the valve seat are an integral member formed by an integrally molding process.
In particular, the biasing member is abutted against the piston such that the biasing force acts directly on the piston.
Alternatively, the flow regulating valve further includes a linkage member, the linkage member is disposed between the biasing member and the piston and is able to be linked with the piston. The biasing member is abutted against the linkage member such that the biasing force acts on the linkage member.
In particular, the biasing member includes a spring. The smaller the force exerted by the incoming fluid on the piston is, the greater the width of the fluid inlet formed by the piston and the valve seat is.
In accordance with another aspect of the present invention, there is provided a flow regulating valve, characterized in that the flow regulating valve includes:
In particular, the piston is movable between an upper limit position farthest from the valve seat and a lower limit position closest to the valve seat; and
In particular, the incoming fluid includes a gas or a liquid, or a mixture of gas and liquid.
In particular, the incoming fluid is a refrigerant.
The flow regulating valve further includes a stop member, which is disposed at a distal end of the guide member to prevent the piston from falling off from the guide member.
In particular, the stop member includes a clamping band.
In particular, the biasing member includes a helical spring, which is wound around a periphery of the guide member and which has one end abutted against the valve seat and the other end abutted against the piston.
In particular, between the upper limit position and the lower limit position, the smaller the impact force exerted by the incoming fluid on the piston is, the greater a length of the helical spring is, and thus the greater the width of the fluid inlet formed by the piston and the valve seat.
In accordance with another aspect of the present invention, there is provided a compressor. The compressor includes the abovementioned flow regulating valve, and the flow regulating valve is mounted in a suction duct of the compressor or on a suction side of the compressor.
In particular, the flow regulating valve is combined directly with a suction port of the compressor, or, the flow regulating valve is disposed between the suction port of the compressor and an external pipe, or, the external pipe is combined with the suction port of the compressor and the flow regulating valve is disposed in any appropriate position in the external pipe.
With the above technical solutions of the present invention, the flow rate of the fluid entering the compressor can be effectively adjusted with a simple structure and low cost.
In particular, by providing the compressor with the flow regulating valve according to the present invention, in the case where the incoming fluid contains liquid, the flow regulating valve can automatically reduce the width of the fluid inlet of the flow regulating valve, thereby preventing the fluid from quickly flowing into the compressor at an excessively high mass flow rate.
In order to facilitate understanding of the present invention, the present invention will be described in more detail based on exemplary embodiments in conjunction with the drawings. The same or similar reference numerals are used in the drawings to indicate the same or similar components. It should be understood that the drawings are only schematic, and the dimensions and proportions of components in the drawings are not necessarily accurate.
Main structure, working principle, and industrial applicability of the flow regulating valve and the compressor according to the present invention will be described below with reference to
Main Structure
It is worth mentioning that
As shown in
The guide member 2 is fixed to the valve seat 1, and is protruded towards the outside of the valve seat 1. The guide member 2 has a cylindrical shape. The guide member 2 is independent of the piston 4 and the valve seat 1, or the guide member 2 and the piston 4 are an integral member formed by an integrally molding process, or the guide member 2 and the valve seat 1 are an integral member formed by an integrally molding process.
The piston 4 is disposed generally on the outside of the valve seat 1, forms a fluid inlet with the valve seat 1, and is capable of being reciprocated along the guide member 2. The biasing member 3 biases the piston 4 in a direction away from the valve seat 1 (upwards as shown in
The incoming fluid may be a gas, as the fluid GS shown in
An impact force exerted by the incoming fluid on the piston 4 varies depending on a state and/or a mass flow rate of the incoming fluid. The piston 4 is able to be moved to different positions along the guide member 2 under the action of different impact forces to form fluid inlets of different widths with the valve seat 1. The piston 4 is movable between an upper limit position farthest from the valve seat 1 and a lower limit position closest to the valve seat 1.
Specifically,
It should be appreciated that the mass flow rate of the fluid is limited by the width of the narrowest section of the fluid inlet, rather than a wider section of the fluid inlet. Therefore, the width (such as W1 and W2) of the fluid inlet mentioned herein generally refers to the width of the narrowest section of the fluid inlet.
In addition, although
For example, in the state shown in
However, in the state shown in
It should be noted that the reduction of the width of the fluid inlet as described above does not significantly affect the flow rate of the incoming gas, but slows only the flow rate of the incoming liquid. Such an effect had been experimentally confirmed, and is also exactly a desired effect.
In addition, although the cases where the piston 4 is in the upper limit position and the lower limit position is emphatically described with reference to
It can be appreciated that in the above technical solution, while the width of the narrowest section of the fluid inlet is adjusted, the position of the narrowest section of the fluid inlet is also actually adjusted. Based on the above technical solution disclosed in the present invention, those skilled in the art could conceive a technical solution in which only the width of the narrowest section of the fluid inlet is adjusted, but the position of the narrowest section of the fluid inlet is not adjusted, and a technical solution in which only the position of the narrowest section of the fluid inlet is adjusted, but the width of the narrowest section of the fluid inlet is not adjusted.
The flow regulating valve according to the present invention can be widely used in various machines including a compressor.
Although the technical objects, technical solutions, and technical effects of the present invention have been described in detail above with reference to the specific embodiments, it should be understood that the above embodiments are only exemplary, but are not restrictive. All of the modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the principles and spirit of the present invention should fall within the protection scope of the present invention.
Number | Date | Country | Kind |
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201921758623.X | Oct 2019 | CN | national |