阅读说明：本技术 一种压缩机消音器进气结构及往复式压缩机 (Compressor muffler air inlet structure and reciprocating compressor ) 是由 彭家臻 张荣婷 张金圈 陈康 温振宇 杨建奎 于 2021-09-23 设计创作，主要内容包括：本发明公开了一种压缩机消音器进气结构及往复式压缩机,属于压缩机技术领域,以解决现有的压缩机消音器在吸气时存在吸气回流而影响压缩机制冷量的问题。本发明一种压缩机消音器进气结构,所述消音器内部具有消音腔,所述消音器上设有与消音腔相通的消音器进气口和与所述消音腔相通的消音器排气口,所述消音器排气口与所述压缩机的压缩机进气口相通,所述第一进气口通过进气通道与所述消音腔连通,所述进气通道设有单向进气装置。本发明本发明在第一进气口设置单向进气装置,在压缩机吸气时单向进气装置开启冷媒正常进入到消音器内,当消音器内的压力大于压缩机壳体压力,则单向进气装置关闭,防止进气回流,提高压缩机的制冷量。(The invention discloses an air inlet structure of a compressor silencer and a reciprocating compressor, belongs to the technical field of compressors, and aims to solve the problem that the refrigerating capacity of the compressor is influenced by suction reflux of the existing compressor silencer during suction. The invention relates to an air inlet structure of a compressor silencer, wherein a silencing cavity is arranged in the silencer, a silencer air inlet communicated with the silencing cavity and a silencer air outlet communicated with the silencing cavity are arranged on the silencer, the silencer air outlet is communicated with the compressor air inlet of the compressor, a first air inlet is communicated with the silencing cavity through an air inlet channel, and the air inlet channel is provided with a one-way air inlet device. The one-way air inlet device is arranged at the first air inlet, when the compressor inhales air, the one-way air inlet device opens a refrigerant and normally enters the silencer, and when the pressure in the silencer is greater than the pressure of the shell of the compressor, the one-way air inlet device is closed, so that air inlet backflow is prevented, and the refrigerating capacity of the compressor is improved.)

1. A silencer of a compressor is provided, the silencer is internally provided with a silencing cavity, the silencer is provided with a silencer air inlet communicated with the silencing cavity and a silencer exhaust outlet communicated with the silencing cavity, the silencer exhaust outlet is communicated with the compressor air inlet of the compressor, the silencer is characterized in that,

the first air inlet is communicated with the silencing cavity through an air inlet passage, the air inlet passage is provided with a one-way air inlet device, and the one-way air inlet device is used for communicating the air inlet passage when the compressor inhales air.

2. A compressor muffler inlet structure as claimed in claim 2, wherein said one-way inlet means comprises:

the sealing body is movably arranged in the air inlet channel, a first matching surface is arranged in the air inlet channel, and the sealing body is in sealing matching with the first matching surface;

an elastic member; the sealing structure is arranged in the air inlet channel, two ends of the elastic component are respectively abutted against the sealing body and the silencer, the elastic component extrudes the sealing body on the first matching surface under the action of elasticity, and the acting force direction of the elastic component on the sealing body is opposite to the direction of air entering the first air inlet when the compressor inhales air.

3. The compressor muffler inlet structure as recited in claim 2, wherein a first shoulder is formed in the inlet passage, the first shoulder being disposed adjacent to the outlet of the inlet passage with respect to the first mating surface, an end of the elastic member abutting against the first shoulder.

4. The intake structure of a compressor silencer according to claim 2, wherein the sealing body has a spherical surface, a first conical mating surface is provided in the intake passage, an axis of the first mating surface is the same as an intake direction of the intake passage inlet, a cross section of the first mating surface is gradually enlarged along the intake direction of the intake passage inlet, and the spherical surface is in sealing engagement with the first mating surface.

5. A compressor silencer air intake structure as claimed in claim 4, wherein the first mating surface generatrix is at an angle θ with respect to its axis, wherein 5 ° θ 15 ° or 75 ° θ 85 °.

6. The compressor muffler inlet structure as recited in claim 5, wherein the taper θ of the first mating surface satisfies:wherein D is₂Is the diameter of the end part of the larger end of the first matching surface, L is the distance between the two ends of the first matching surface, and rad is the radian of an angle unit.

7. A compressor silencer air intake structure as claimed in any one of claims 2 to 6, wherein the elastic member is a compression spring having a stiffness of 50N/m to 500N/m.

8. The compressor muffler inlet structure of claim 2, wherein the sealing body has a second mating surface provided with a protrusion extending along the inlet passage, the first mating surface forming a second shoulder in the inlet passage, the second mating surface being in sealing engagement with the second shoulder under the force of the elastic member, the protrusion being disposed in a clearance with a side wall of the inlet passage.

9. A reciprocating compressor comprising a muffler inlet structure according to any one of claims 1 to 8.

10. The reciprocating compressor of claim 9, further comprising a valve plate, said valve plate having said compressor inlet port thereon, said compressor inlet port communicating with said muffler inlet port.

Technical Field

The invention relates to the technical field of compressors, in particular to a compressor silencer air inlet structure and a reciprocating compressor.

Background

Patent No. 202110456182.3 discloses a suction muffler with a cyclone member, which aims to separate an oil-gas mixture by the cyclone member, thereby reducing the oil discharge rate of the compressor without considering the suction backflow problem of the muffler.

Patent No. 201811501278.1 discloses a piston compressor which omits a gasket, and seals between a suction muffler and a valve plate with a sealing strip; the patent also does not consider the problem of suction backflow of the muffler.

Suction reflux problem of muffler: piston compressor receives the influence of valve block switching and the interior gas compression of cylinder at the course of the work, and the muffler internal pressure of breathing in is unstable, when muffler internal pressure was greater than external casing pressure, will take place to breathe in the backward flow, reduces the inspiratory capacity of compressor, finally reduces compressor refrigerating output.

Disclosure of Invention

In view of the above, the invention discloses an air inlet structure of a compressor silencer and a reciprocating compressor, which are used for solving the problem that the refrigerating capacity of the compressor is influenced by the suction reflux of the existing compressor silencer during suction.

In order to achieve the above object, the invention adopts the following technical scheme:

the invention discloses a compressor silencer air inlet structure, wherein a silencing cavity is arranged in a silencer, a silencer air inlet communicated with the silencing cavity and a silencer air outlet communicated with the silencing cavity are arranged on the silencer, the silencer air outlet is communicated with a compressor air inlet of a compressor, a first air inlet is communicated with the silencing cavity through an air inlet channel, the air inlet channel is provided with a one-way air inlet device, the one-way air inlet device is used for communicating the air inlet channel when the compressor inhales air, and the air inlet channel is blocked when the compressor exhausts air.

Further, the unidirectional air intake device includes: the sealing body is movably arranged in the air inlet channel, a first matching surface is arranged in the air inlet channel, and the sealing body is in sealing matching with the first matching surface; an elastic member; the elastic component extrudes the sealing body on the first matching surface under the action of elasticity, and the acting force direction of the elastic component on the sealing body is opposite to the direction of air entering the first air inlet when the compressor inhales air.

Further, a first shoulder is formed in the air inlet channel, the first shoulder is arranged close to the outlet of the air inlet channel relative to the first matching surface, and the end of the elastic component abuts against the first shoulder.

Further, the sealing body is provided with a spherical surface, a first conical matching surface is arranged in the air inlet channel, the axis of the first matching surface is the same as the air inlet direction of the inlet of the air inlet channel, the cross section of the first matching surface is gradually enlarged along the air inlet direction of the inlet of the air inlet channel, and the spherical surface is in sealing fit with the first matching surface.

Furthermore, the included angle between the generatrix of the first matching surface and the axis of the first matching surface is theta, wherein the theta is more than or equal to 5 degrees and less than or equal to 15 degrees or more than or equal to 75 degrees and less than or equal to 85 degrees.

Further, the taper θ of the first mating face satisfies:wherein D is₂Is the diameter of the end part of the larger end of the first matching surface, L is the distance between the two ends of the first matching surface, and rad is the radian of an angle unit.

Further, the elastic component is a compression spring, and the rigidity of the compression spring is 50N/m-500N/m.

Furthermore, the sealing body is provided with a second matching surface, the second matching surface is provided with a bulge extending along the air inlet channel, the first matching surface forms a second shoulder in the air inlet channel, the second matching surface is in sealing fit with the second shoulder under the action force of the elastic component, and the bulge and the side wall of the air inlet channel are arranged in a clearance mode.

In a second aspect of the present invention, there is disclosed a reciprocating compressor comprising the muffler intake structure of the first aspect.

Further, reciprocating compressor still includes the valve plate, be equipped with on the valve plate the second air inlet, the second air inlet with first air inlet communicates with each other.

Has the advantages that: the one-way air inlet device is arranged at the first air inlet, and in the air suction process of the compressor, the one-way air inlet device is opened, the refrigerant normally enters the silencer, the pressure in the silencer is higher than the pressure of the shell of the compressor, and the one-way air inlet device is closed to separate an air inlet channel.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely exemplary embodiments of the present disclosure, and other drawings may be derived by those skilled in the art without inventive effort.

FIG. 1 shows an exploded view of a silencer in embodiment 1 of the present invention;

FIG. 2 is a sectional view showing a muffler in embodiment 1 of the present invention;

fig. 3 is a dimensional view showing that the first mating face is a conical face in embodiment 1 of the present invention;

FIG. 4 is a force analysis diagram showing a spherical surface on the sealing body when the first mating surface is a conical surface in embodiment 1 of the present invention;

fig. 5 is a diagram showing a matching relationship between the sealing body and the air inlet duct when the sealing body is T-shaped in embodiment 1 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms "a", "an", and "the" as used in the embodiments of the present invention and the appended claims are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in a commodity or system that includes the element.

To further illustrate the technical solution of the present invention, the following specific examples are provided in conjunction with fig. 1 to 5.

Example 1

In this embodiment, an air inlet structure of a silencer of a compressor is provided, as shown in fig. 1 and fig. 2, the silencer is provided with 10 a first air inlet 11, a silencing cavity 13 communicated with the first air inlet 11, and an air outlet communicated with the silencing cavity 13, the air outlet is communicated with a second air inlet of the compressor, the first air inlet 11 is communicated with the silencing cavity through an air inlet channel 13, the air inlet channel 13 is provided with a one-way air inlet device 20, and the one-way air inlet device 20 is used for communicating the air inlet channel when the compressor inhales air.

Optionally, the muffler 10 includes an upper casing 101 and a lower casing 102, the upper casing 101 and the lower casing 102 are sealed and fastened together to form the sound-deadening chamber, and the first air inlet and the air inlet passage 13 are formed on the lower casing 102.

Further, as shown in fig. 2 and 5 (the elastic member is not shown in fig. 5), the one-way air intake device 20 includes: the sealing body 21 is movably arranged in the air inlet channel 13, a first matching surface a is arranged in the air inlet channel 13, and the sealing body 21 is matched with the first matching surface a in a sealing manner; an elastic member 22; the elastic component 22 is arranged in the air inlet channel 13, two ends of the elastic component 22 abut against the sealing body 21 and the silencer 10, the sealing body 21 is pressed on the first matching surface a by the elastic component 22 under the action of elastic force, and the acting force direction of the elastic component 22 on the sealing body 21 is opposite to the air inlet direction of the first air inlet 11 when the compressor sucks air.

As a first preferred embodiment of this embodiment, as shown in fig. 2, the sealing body 21 has a spherical surface b, a first conical mating surface a is provided in the intake passage 13, an axis of the first mating surface a is the same as an intake direction of an inlet of the intake passage 13, a cross section of the first mating surface a gradually increases along the intake direction of the inlet of the intake passage 13, and the spherical surface b is in sealing engagement with the first mating surface a.

Preferably, the sealing body is a 21-bit sphere. When the sealing body 21 is a spherical surface (non-spherical surface), the non-spherical surface part of the sealing body 21 is fixedly connected with the elastic component 22, so that the sealing body 21 is prevented from rotating to cause the non-spherical surface part to be matched with the first matching surface a to cause poor sealing. When the sealing body 21 is a sphere, the sealing body 21 may be fixedly connected to the elastic member 22, or may be in contact with the elastic member.

Preferably, as shown in FIG. 3, the included angle between the generatrix of the first fitting surface a and the axis thereof is theta, wherein theta is more than or equal to 5 degrees and less than or equal to 15 degrees or more than or equal to 75 degrees and less than or equal to 85 degrees. As shown in fig. 4, when θ is small, the axial component of the first mating face a to the spherical contact force decreases (drawing summary F)_NSin theta is reduced), which is not beneficial to sealing the first air inlet by the spherical surface, when theta is too small, the first matching surface a can not clamp the spherical surface, the sealing body is pressed out of the inlet of the air inlet channel, and the problem of air suction backflow exists; when theta is too large, the suction resistance of the compressor is large, the air inflow of the compressor is reduced, and the refrigerating performance is affected.

Preferably, the taper θ of the first mating face a satisfies:wherein D is₂The diameter of the end part of the larger end of the first matching surface a, L is the distance between the two ends of the first matching surface, and rad is the radian of an angle unit. The silencer can normally absorb air and form sealing fit on the spherical surface.

Preferably, the elastic member 22 is preferably a compression spring.

Preferably, the stiffness of the compressed spring is between 50N/m and 500N/m. The spring stiffness can ensure the spherical support of the ball sealing body 21, the larger spring stiffness is beneficial to sealing the spherical surface and the first matching surface a, but the larger spring stiffness can put forward higher requirements on the pressure difference of two sides of the sealing body 21, so that the exhaust resistance of the compressor is increased, the exhaust capacity of the compressor is reduced, and the refrigeration of the compressor is not facilitated.

As a second implementation manner of this embodiment, as shown in fig. 5, the sealing body 21 has a second mating surface c, the second mating surface c is provided with a protrusion extending along the air inlet channel 13, the first mating surface a forms a second shoulder in the air inlet channel 13, the second mating surface is in sealing fit with the second shoulder under the action of the elastic component 22, the protrusion is arranged with a gap from the side wall of the air inlet channel, so that the sealing body 21 is opened when the compressor sucks air, and the second mating surface c is arranged with the first mating surface a with a gap, so that the refrigerant enters the compressor cylinder through the sound deadening cavity. The sealing body 21 is convex toward the inlet end of the air intake passage 13 and is inserted into the narrow passage at the first shoulder of the air intake passage 13 by the elastic force of the elastic member 22. Because the two sides of the protruding part of the T-shaped sealing body 21 are not restricted, the problem that shaking and sealing are not tight easily occurs due to uneven stress exists, and gas backflow can be prevented to a certain extent.

As a third embodiment of this embodiment, a wedge-shaped surface is formed on the sealing body 21, the first engagement surface a is matched with the wedge-shaped surface, and the sealing body 21 pushes the sealing body 21 into the first engagement surface under the elastic force of the elastic member 22 to form a sealing engagement. The wedge surface can be a quadrangular frustum pyramid (the top of the quadrangular frustum pyramid is removed to form the wedge surface), the first matching surface a is a quadrangular pyramid surface, and the refrigerant backflow is prevented through the sealing matching of the four surfaces. The quadrangular pyramid surface and the quadrangular frustum are complicated to manufacture and have a high manufacturing cost, compared with the first embodiment.

In order to enable the acting force of the compression spring to act on the sealing body 21 to realize sealing, a first shoulder d is further formed in the air inlet channel 13, the first shoulder d is arranged close to the outlet of the air inlet channel 13 relative to the first matching surface a, and the end part of the compression spring abuts against the first shoulder d.

Example 2

This embodiment provides a reciprocating compressor including the muffler intake structure described in embodiment 1.

The reciprocating compressor further comprises a valve plate, wherein the valve plate is provided with a second air inlet, and the second air inlet is communicated with the first air inlet.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.