CN116163928A - Compression cylinder, compressor and refrigeration equipment - Google Patents

Compression cylinder, compressor and refrigeration equipment Download PDF

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Publication number
CN116163928A
CN116163928A CN202210155537.XA CN202210155537A CN116163928A CN 116163928 A CN116163928 A CN 116163928A CN 202210155537 A CN202210155537 A CN 202210155537A CN 116163928 A CN116163928 A CN 116163928A
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CN
China
Prior art keywords
suction hole
cylinder
piston
air
cylinder body
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CN202210155537.XA
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Chinese (zh)
Inventor
晏子涵
张洋洋
马涛
黄刚
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Anhui Meizhi Compressor Co Ltd
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Anhui Meizhi Compressor Co Ltd
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Priority to CN202210155537.XA priority Critical patent/CN116163928A/en
Publication of CN116163928A publication Critical patent/CN116163928A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/122—Cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/123—Fluid connections

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Abstract

The invention relates to the technical field of compressors, in particular to a compression cylinder, a compressor and refrigeration equipment. The compression cylinder includes: a cylinder and a piston assembly. A cylinder cover of the cylinder body is provided with a first air suction hole; the piston assembly comprises a piston movably arranged in the cylinder body; the side wall of the cylinder body is also provided with a second air suction hole, and the size of the second air suction hole in the axial direction of the piston is smaller than the size of the second air suction hole in the circumferential direction of the piston. The relatively small size of the second suction hole in the axial direction of the piston can reduce the time for which the second suction hole is opened, thus reducing the influence on the intake air of the first suction hole. The relatively large size of the second suction hole in the circumferential direction of the piston can increase the intake air amount of the second suction hole, so that the compression cylinder can reduce the influence on the intake air of the first suction hole while ensuring the intake air amount of the second suction hole.

Description

Compression cylinder, compressor and refrigeration equipment
Technical Field
The invention relates to the technical field of compressors, in particular to a compression cylinder, a compressor and refrigeration equipment.
Background
The compressor is the most core component and the energy consumption big piece of refrigeration equipment, and the higher requirements are also put on the refrigeration performance and the energy efficiency level of the compressor. When the refrigerating equipment is used for refrigerating, the refrigerant is required to be compressed by a compressor, and the refrigerant is generally input into the cylinder body through a suction hole on the cylinder body and then is compressed by a piston. The amount of air taken by the compression cylinder determines the amount of refrigerant compressed by the compressor each time, and the amount of refrigerant compressed by the compressor each time affects the refrigerating efficiency of the refrigerating apparatus to a certain extent.
In the existing refrigeration equipment such as a refrigerator, the compressor is connected in series to realize the refrigeration functions of freezing and refrigerating through one pipeline, so that the COP (energy efficiency ratio) of the refrigerator is low. Based on the traditional single-suction single-discharge compression pump body mechanism, the novel single-cylinder double-independent suction pump body structure has the capability of greatly improving the overall performance of the reciprocating compressor, and can obtain a better energy efficiency ratio. However, in the existing double suction air compression cylinder, the second suction hole has a great influence on the suction of the first suction hole.
Disclosure of Invention
The invention mainly aims to provide a compression cylinder, and aims to solve the problem that a second air suction hole of a traditional compression cylinder can have a larger influence on air suction of a main air suction hole.
In order to achieve the above object, the present invention provides a compression cylinder comprising:
a cylinder body, wherein a cylinder cover of the cylinder body is provided with a first air suction hole; the method comprises the steps of,
the piston assembly comprises a piston movably arranged in the cylinder body, and the piston is provided with a first dead center close to a cylinder cover of the cylinder body and a second dead center far away from the cylinder cover of the cylinder body in the moving stroke;
the side wall of the cylinder body is further provided with a second air suction hole, and the size of the second air suction hole in the axial direction of the piston is smaller than that of the second air suction hole in the circumferential direction of the piston.
Optionally, the second air suction hole is arranged in an elliptical shape; or alternatively, the first and second heat exchangers may be,
the second air suction holes are arranged in a long hole.
Optionally, the length of the second air suction hole in the axial direction of the piston is a, and the length of the second air suction hole in the circumferential direction of the piston is b, wherein a/b is more than or equal to 0.1 and less than or equal to 1.
Optionally, the length of the second air suction hole in the axial direction of the piston is a, and the distance between the first dead point and the second dead point is S, wherein a/S is less than 0.5.
Optionally, the distance between the second air suction hole and the first dead point is L, and the distance between the first dead point and the second dead point is S, wherein 0.5S is less than L.
Optionally, the diameter of the cylinder body is D, the cross-sectional area of the second air suction hole is s, wherein 0.001 is less than or equal to s/D 2 ≤1。
Optionally, a plurality of second air suction holes are provided, and the plurality of second air suction holes are arranged on the side wall of the cylinder body along the circumferential direction of the cylinder body.
Optionally, the cylinder body extends along the horizontal direction, and the second air suction hole is arranged on the upper half part of the side wall of the cylinder body.
The invention also proposes a compressor comprising a compression cylinder comprising:
a cylinder body, wherein a cylinder cover of the cylinder body is provided with a first air suction hole; the method comprises the steps of,
the piston assembly comprises a piston movably arranged in the cylinder body, and the piston is provided with a first dead center positioned on a cylinder cover of the cylinder body and a second dead center far away from the cylinder cover of the cylinder body in the moving stroke;
the side wall of the cylinder body is further provided with a second air suction hole, and the size of the second air suction hole in the axial direction of the piston is smaller than that of the second air suction hole in the circumferential direction of the piston.
The invention also proposes a refrigeration device comprising a compressor comprising the compression cylinder comprising:
a cylinder body, wherein a cylinder cover of the cylinder body is provided with a first air suction hole; the method comprises the steps of,
the piston assembly comprises a piston movably arranged in the cylinder body, and the piston is provided with a first dead center positioned on a cylinder cover of the cylinder body and a second dead center far away from the cylinder cover of the cylinder body in the moving stroke;
the side wall of the cylinder body is further provided with a second air suction hole, and the size of the second air suction hole in the axial direction of the piston is smaller than that of the second air suction hole in the circumferential direction of the piston.
Optionally, the refrigeration device is a refrigerator.
According to the technical scheme, the first air suction hole is formed in the cylinder cover of the cylinder body, the second air suction hole is formed in the side wall of the cylinder body to suck refrigerant, and the air inflow of the compression cylinder can be improved through matching air suction of the first air suction hole and the second air suction hole. The first air suction hole and the second air suction hole may have different air inlet pressure during air suction, and this may cause mutual interference during simultaneous air suction of the first air suction hole and the second air suction hole, so that the first air suction hole and the second air suction hole need to be used alternately. In this scheme, the piston can close the second suction hole when moving to the one end of second suction hole to the second suction hole, when the piston moves to between the second suction hole and the second dead center, the second suction hole opens. The second suction hole has a relatively small size in the axial direction of the piston, so that the time for which the second suction hole is opened is reduced to some extent, thus reducing the influence of the second suction hole on the intake of the first suction hole. The size of the second air suction hole in the circumferential direction of the piston is generally larger, so that the air inflow of the second air suction hole can be increased to a certain extent, and the influence of the second air suction hole on the air inflow of the first air suction hole can be reduced under the condition that the air inflow of the second air suction hole is ensured by the compression cylinder.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a compression cylinder according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the compression cylinder of FIG. 1;
FIG. 3 is a schematic view of a portion of the structure of FIG. 1;
fig. 4 is a schematic cross-sectional view of an embodiment of a compressor provided by the present invention.
Reference numerals illustrate:
Figure BDA0003510993780000031
Figure BDA0003510993780000041
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The compressor is the most core component and the energy consumption big piece of refrigeration equipment, and the higher requirements are also put on the refrigeration performance and the energy efficiency level of the compressor. When the refrigerating equipment is used for refrigerating, the refrigerant is required to be compressed by a compressor, and the refrigerant is generally input into the cylinder body through a suction hole on the cylinder body and then is compressed by a piston. The amount of air taken by the compression cylinder determines the amount of refrigerant compressed by the compressor each time, and the amount of refrigerant compressed by the compressor each time affects the refrigerating efficiency of the refrigerating apparatus to a certain extent.
In the existing refrigeration equipment such as a refrigerator, the compressor is connected in series to realize the refrigeration functions of freezing and refrigerating through one pipeline, so that the COP (energy efficiency ratio) of the refrigerator is low. Based on the traditional single-suction single-discharge compression pump body mechanism, the novel single-cylinder double-independent suction pump body structure has the capability of greatly improving the overall performance of the reciprocating compressor, and can obtain a better energy efficiency ratio. However, in the existing double suction air compression cylinder, the second suction hole has a great influence on the suction of the first suction hole.
In view of the above, the present invention provides a compression cylinder, which aims to solve the problem that the second suction hole of the conventional compression cylinder has a larger influence on the suction of the main suction hole. Fig. 1 to 4 are views showing an embodiment of a compression cylinder according to the present invention.
Referring to fig. 1 to 3, a compression cylinder 100 according to the present invention includes: cylinder 1 and piston assembly. The cylinder body 1 comprises a cylinder body 1 arranged in the cylinder body, and a first air suction hole 13 is formed in a cylinder cover of the cylinder body 1; the piston assembly comprises a piston movably arranged in the cylinder body 1, and the piston is provided with a first dead center positioned on a cylinder cover of the cylinder body 1 and a second dead center far away from the cylinder cover of the cylinder body 1 in the moving stroke; wherein, the side wall of the cylinder body 1 is also provided with a second air suction hole 12, and the size of the second air suction hole 12 in the axial direction of the piston is smaller than the size in the circumferential direction of the piston.
In the present invention, the first air intake hole is provided in the cylinder head of the cylinder block 1 and the second air intake hole 12 is provided in the side wall of the cylinder block 1, so that the compression cylinder 100 can intake a refrigerant, and the first air intake hole and the second air intake hole 12 can increase the intake air amount of the compression cylinder 100 by the cooperative intake. The intake pressure may be different between the first and second intake holes 12 when the air is sucked, and this may cause interference between the first and second intake holes 12 when the air is sucked at the same time, so that the first and second intake holes 12 need to be used alternately. In this embodiment, a working chamber 11 is formed in the cylinder 1, and the piston 21 moves within the working chamber 11. The piston closes the second suction hole 12 when moving to one end of the second suction hole 12, and the second suction hole 12 is opened when the piston moves between the second suction hole 12 and the second dead point. The second suction hole 12 is relatively small in size in the axial direction of the piston, so that the time for which the second suction hole 12 is opened is reduced to some extent, thus reducing the influence of the second suction hole 12 on the intake air of the first suction hole. And the second suction hole 12 is generally provided with a larger size in the circumferential direction of the piston, so that the intake air amount of the second suction hole 12 can be increased to some extent, so that the compression cylinder 100 can reduce the influence of the second suction hole 12 on the intake air of the first suction hole while securing the intake air amount of the second suction hole 12.
Further, the second suction hole 12 needs to be reduced in length in the axial direction of the piston in order to reduce the influence on the intake air of the first suction hole, and the length of the second suction hole 12 in the circumferential direction of the piston should be appropriately lengthened in order to increase the suction amount of the second suction hole 12 itself. In one embodiment of the invention, therefore, the second suction holes 12 are provided in an oval shape.
The cross section of the second air suction hole 12 is elliptical, and the short axis of the cross section of the second air suction hole 12 is arranged along the axial direction of the piston in an extending way, so that the influence of the second air suction hole 12 on the air intake of the first air suction hole can be reduced to a great extent, and the air suction amount of the second air suction hole 12 can be ensured.
The second air suction hole 12 may be a long hole, and the long hole and the oval hole are long and narrow, so that the second air suction hole 12 can be similar to the oval hole when being arranged, and the air intake influence of the second air suction hole 12 on the first air suction hole is reduced to a great extent. The second suction hole 12 is provided as an elongated hole, which has the advantage of being relatively mature in manufacturing process.
When the length of the second suction hole 12 in the axial direction of the piston is too small, the length of the second suction hole 12 in the circumferential direction of the piston needs to be set large in order to secure the intake air amount of the second suction hole 12. However, when the length of the second suction hole 12 in the circumferential direction of the piston is excessively large, the elongated shape of the second suction hole 12 may affect the strength of the cylinder 1. Thus, in any of the above embodiments, the second suction hole 12 has a length a in the axial direction of the piston and a length b in the circumferential direction of the piston, wherein 0.1.ltoreq.a/b.ltoreq.1.
When the ratio of the length of the second suction hole 12 in the axial direction of the piston to the length of the second suction hole in the circumferential direction of the piston is less than 0.1, the second suction hole 12 is too narrow at this time, which may affect the strength of the cylinder 1, and the actual intake air amount may also be affected.
When the ratio of the length of the second suction hole 12 in the axial direction of the piston to the length of the second suction hole in the circumferential direction of the piston is greater than 1, the length of the second suction hole 12 in the axial direction of the piston is longer at this time, and the influence on the intake air of the first suction hole is excessive.
Further, the length of the second air suction hole 12 in the axial direction of the piston is a, and the distance between the first dead point and the second dead point is S, wherein a/S is less than 0.5.
In this embodiment, the piston closes the second suction hole 12 when moving to one end of the second suction hole 12, and the second suction hole 12 is opened when the piston moves between the second suction hole 12 and the second dead point. Therefore, the intake air amount of the first intake hole is affected when the length of the second intake hole 12 in the piston axial direction is excessively long, and therefore the length of the second intake hole 12 in the piston axial direction should be set relatively small.
By taking the distance between the first dead point and the second dead point as a reference for setting the second suction hole 12, when the length of the second suction hole 12 in the axial direction of the piston is greater than half the distance between the first dead point and the second dead point, the length of the second suction hole 12 in the axial direction of the piston is already too large, and at this time, closing and opening the second suction hole 12 takes a lot of time in the moving stroke of the piston, which may affect the intake of the first suction hole for a long time. The length of the second suction hole 12 in the axial direction of the piston is generally smaller than half the distance between the first dead point and the second dead point, thereby reducing the influence on the intake air of the first suction hole.
The present invention also provides a compressor 200, and fig. 4 is a schematic diagram of an embodiment of the compressor 200 according to the present invention. Taking the refrigerating system of the refrigerator as an example, the compressor 200 is used for the refrigerator to illustrate, because the high-temperature and high-pressure refrigerant gas is conveyed from the compressor 200 to the corresponding evaporators of the freezing chamber and the refrigerating chamber to evaporate and absorb heat in the refrigerating process of the refrigerator, the refrigerating chamber and the refrigerating chamber are cooled, but the temperatures of the freezing chamber and the refrigerating chamber are inconsistent, the evaporating temperatures of the freezing chamber and the refrigerating chamber are different, the temperature and the pressure of the refrigerant after the heat exchange of the freezing chamber and the refrigerating chamber are different, and in the prior art, the compressor 200 realizes the refrigerating function of freezing and refrigerating through one flow path, so that the whole heat exchange system needs to participate in the working process no matter whether the freezing chamber or the refrigerating chamber needs to be refrigerated, so that the energy consumption is larger, and the energy efficiency is lower.
Referring to fig. 4, the compressor 200 includes a cylinder 1 and a piston assembly. A first air suction hole is formed in the bottom of the working cavity 11 and is used for communicating with a first condensation flow path; and the side wall is also provided with a second air suction hole 12, the second air suction hole 12 is communicated with a second condensation flow path, the piston assembly comprises a piston movably arranged in the cylinder body 1, a working cavity 11 is formed between the piston and the bottom of the cylinder body 1, and the piston is provided with a first dead point close to the bottom of the working cavity 11 and a second dead point far away from the bottom of the working cavity 11 in a movable stroke.
In the technical scheme provided by the invention, by arranging two parallel flow paths, namely a freezing condensation flow path and a refrigerating condensation flow path, namely the compressor 200 can reasonably distribute high-temperature and high-pressure refrigerant formed by compression to the freezing flow path and the refrigerating flow path, the high-temperature and high-pressure refrigerant formed by compression of the compressor 200 returns to the compressor 200 at a lower temperature and a lower pressure after passing through the corresponding evaporator of the freezing chamber, and the high-temperature and high-pressure refrigerant formed by compression of the compressor 200 returns to the compressor 200 at a higher temperature and a higher pressure after passing through the corresponding evaporator of the refrigerating chamber. The working chamber 11 of the cylinder 1 is simultaneously communicated with the first air suction hole and the second air suction hole 12, so that the air suction amount of the working chamber 11 of the cylinder 1 can be increased by the first air suction flow passage corresponding to the first air suction hole, the compression energy efficiency of the compressor 200 is improved by conveying the refrigerant with relatively low temperature and relatively low pressure flowing back from the freezing chamber into the cylinder 1 of the compressor 200 through the first air suction hole, and the refrigerant with relatively high temperature and relatively high pressure flowing back from the refrigerating chamber is conveyed into the compressor 200 through the second air suction hole 12, so that when the cylinder 1 compresses the refrigerant gas conveyed by the first air suction hole, the second air suction hole 12 can supplement air into the working chamber 11, thereby improving the air suction amount of the working chamber 11 of the cylinder 1, further improving the compression energy efficiency of the compressor 200, realizing respective working condition by two parallel flow passages and reducing power consumption. Since the second suction hole 12 is used in the compressor 200 of the present invention, embodiments of the refrigeration apparatus of the present invention include all technical solutions of all embodiments of the second suction hole 12, and the achieved technical effects are identical, and are not described herein again.
Since it is often necessary to control the opening and closing of each suction hole by a control valve group in the conventional compressor 200, when the compressor 200 has only one suction hole, one control valve group is provided; when the compressor 200 has a plurality of suction holes, a plurality of control valve sets are generally correspondingly arranged, so that the control is complicated. Thus, in an embodiment of the present invention, the distance between the second suction hole 12 and the first dead point is L, and the distance between the first dead point and the second dead point is S, where 0.5S < L. During the movement of the piston, the opening and closing states of the first air suction hole and the second air suction hole 12 are as follows:
an intake stroke of a cylinder, comprising:
first pass: the piston moves from the first dead point to the second dead point, and the distance from the first dead point is smaller than 0.5S. In the first stroke, the control valve group is opened, so that the first air suction hole is conducted, and the second air suction hole 12 is shielded by the piston. At this time, the working chamber 11 of the cylinder 1 is sucked only through the first suction hole. At this time, the total amount of the refrigerant in the working chamber 11 is from the first suction hole, i.e., the refrigerant in the first condensation circuit. It will be appreciated that, as the piston moves toward the position close to the second dead center, the compression space of the working chamber 11 of the cylinder 1 increases, and the piston is in a negative pressure state, so that the external air flow is facilitated to enter the working chamber 11 of the cylinder 1 from the first suction hole. And since the pressure of the air flow through the first suction hole is smaller than the pressure of the air flow through the second suction hole 12. Therefore, in this moving stroke, the second suction hole 12 is blocked by the piston, so as to avoid that the air flow of the second suction hole 12 obstructs the air flow of the first suction hole to enter the working chamber 11 of the cylinder 1.
A second stroke: the piston moves from the first dead point to the second dead point, and the distance from the first dead point is larger than 0.5S. In the second stroke, the piston does not block the second air suction hole 12, so that the second air suction hole 12 is communicated with the working cavity 11 of the cylinder body 1. At this time, the control valve group is switched between an open state and a closed state according to actual requirements. When the control valve group is in an open state, the first air suction hole and the second air suction hole 12 simultaneously input air flow into the working cavity 11 of the cylinder body 1. Since a certain amount of air flow is sucked into the space of the working chamber 11 of the cylinder 1 through the first suction hole in the first stroke, a certain air flow pressure is provided in the compression space. Therefore, when the air flow is inputted into the working chamber 11 of the cylinder 1 through the second suction hole 12, the air flow of the first suction hole is less affected. And because the distance from the second air suction hole 12 to the first dead point is greater than 0.5S, namely the distance from the second air suction hole to the first air suction hole is greater than 0.5S, a proper buffer distance exists between the second air suction hole and the first air suction hole, the influence of the air flow of the second air suction hole 12 on the air flow of the first air suction hole is reduced, and the compression energy efficiency is improved. When the control valve group is in a closed state, the second air suction hole 12 inputs air flow to the working chamber 11 of the cylinder body 1. At this time, the refrigerant supplied into the working chamber 11 comes from the second suction hole 12, i.e., the refrigerant of the second condensation circuit flows back into the working chamber 11 of the cylinder 1. It can be understood that the closer the second suction hole 12 is to the midpoint between the first dead point and the second dead point, the earlier the second suction hole 12 is opened and the later the second suction hole is closed, the longer the high-pressure refrigerant is provided by the second condensation circuit, and the larger the air supplement amount is; when the second suction hole 12 is closer to the second dead point, the second suction hole 12 is opened later and closed earlier, and the high-pressure refrigerant provided by the second condensation loop is short in time and short in air supplementing time, so that the air supplementing amount is also smaller. In reality, the position of the second suction hole 12 may be set according to the requirement of the air supply amount.
A compression stroke of a cylinder, comprising:
third stroke: the piston moves from the second dead point to a direction close to the first dead point, and is more than 0.5S away from the first dead point. In the third stroke, the control valve group is closed, and the piston moves rapidly towards the direction close to the first dead point. At this time, the second suction hole 12 still inputs an air flow into the working chamber 11 of the cylinder 1. At this time, the refrigerant supplied into the working chamber 11 comes from the second suction hole 12. Therefore, in the third stroke, when the air flow in the working chamber 11 of the cylinder 1 is compressed, the air flow inputted into the working chamber 11 of the cylinder 1 via the second suction hole 12 is not excessively blocked yet, so that the cylinder 1 can still suck the air flow in the compression stroke. Further, the working chamber 11 of the cylinder 1 is mixed with the air flow from the first air suction hole and the second air suction hole 12, so that the air flow pressure in the working chamber 11 of the cylinder 1 is smaller than the air flow pressure in the second air suction hole 12.
Fourth stroke: the piston moves from the second dead point to a direction close to the first dead point, and the distance from the second dead point is smaller than 0.5S. In the fourth stroke, the control valve group is still closed and the piston blocks the second suction hole 12. In the process, the piston compresses the air flow in the working chamber 11 of the cylinder 1 into a high pressure air flow. And when the piston moves to the second dead point, the pressure of the air flow in the working chamber 11 of the cylinder 1 is compressed in place. At this time, the control valve group of the output pipe communicating with the working chamber 11 of the cylinder 1 is switched from the closed state to the open state to output the compressed high-pressure air flow.
The working lines corresponding to the two condensation flow paths are as follows:
the flow path of the air flow in the first air suction flow path is as follows: the first condensation flow path→the first suction hole→the working chamber 11 of the cylinder 1.
The airflow flow path in the second air suction flow passage is as follows: the second condensation flow path→the second suction hole 12→the working chamber 11 of the cylinder 1.
And the compressor 200 further comprises an inner discharge pipe communicated with the working chamber 11 of the cylinder 1, and the inner discharge pipe is used for communicating with an exhaust outer pipe so as to discharge the compressed high-pressure air flow in the working chamber 11 of the cylinder 1 from the inner discharge pipe to the exhaust outer pipe.
In a specific implementation, the first condensation flow path corresponds to a freezing chamber of a refrigerator, because the refrigerating capacity required by the freezing chamber is larger, the required refrigerant capacity is more, in the working engineering, the pressure of the consumed refrigerant is also more, the second condensation flow path corresponds to a refrigerating chamber of the refrigerator, because the refrigerating capacity required by the refrigerating chamber is smaller, the pressure of the consumed refrigerant is also less, thus the pressure in the first suction hole is far smaller than the pressure of the second suction hole 12, but the refrigerant capacity of the first condensation flow path is larger, in the working process of the compressor 200, the first suction hole is mainly opened for main suction in the suction stroke of the first half section of suction, the larger refrigerant capacity in the condensation flow path corresponding to the freezing chamber can be sucked, in the suction stroke of the second half section of suction, the second suction hole 12 is communicated with the working cavity 11, the first suction hole is closed, the second suction hole 12 starts to enter high-pressure refrigerant gas, in the last half section of compression stage is far smaller than the pressure of the second suction hole 12, the second suction hole 12 is opened, and the second suction hole 12 is opened and closed, in the second suction hole 12 is opened, and the second suction hole is opened and the second suction hole is closed, and the second suction hole is opened. And the second air suction hole 12 is arranged on the side wall of the cylinder body 1 and is close to the second dead point, so that the compressor 200 does not need to specially arrange a control valve group to control the opening and closing of the second air suction hole 12, but can realize the automatic opening and closing of the second air suction hole 12 in the movable stroke of the piston, and the structure design is ingenious and the cost is saved.
The distance between the first dead point and the second dead point is S. That is, the first dead point is a position where the end face of the piston near the end of the bottom of the working chamber 11 is located when the end face is moved to the nearest distance near the bottom wall of the cylinder 1. The second dead center is a position where the end face of the piston near the bottom wall of the cylinder 1 is located when the end face of the end of the piston near the bottom wall of the cylinder 1 moves to the farthest distance away from the bottom of the working chamber 11. I.e. the distance S is the distance between the two extreme conditions of the end face of the piston close to the end of the bottom wall of the cylinder 1. The distance between the second air suction hole 12 and the first dead point is L, that is, the distance between the center line of the second air suction hole 12 and the first dead point is L.
Further, the diameter of the cylinder 1 is D, and the cross-sectional area of the second suction hole 12 is s, wherein 0.001.ltoreq.s/D 2 And is less than or equal to 1. In this embodiment, the piston receives the air pressure in the second air suction hole 12 when passing through the second air suction hole 12, and the magnitude of the pressure received by the piston is the product of the air pressure difference between the cylinder 1 and the second air suction hole 12 and the cross-sectional area of the second air suction hole 12. Therefore, when the suction amount of the second suction hole 12 is sufficient, the second suction hole 12 should be as small as possible, thereby reducing damage to the piston.
When s/D 2 When the cross section area of the second air suction hole 12 is bigger than that of the piston and the cylinder body 1, the impact time to the piston is too long, the impact strength is too big, and the damage to the piston is serious. When s/D 2 When < 0.001, the second suction hole 12 is too small, and the intake air amount of the second suction hole 12 at this time hardly satisfies the volume of the cylinder 1. Thus when 0.001.ltoreq.s/D 2 When the air pressure is less than or equal to 1, the cross section area of the second air suction hole 12 is proper, so that the air suction requirement can be met, and the loss of the piston is less.
Further, referring to fig. 2, in any of the above embodiments, a plurality of the second air intake holes 12 may be provided, and a plurality of the second air intake holes 12 may be provided on the side wall of the cylinder 1 along the circumferential direction of the cylinder 1.
The compression cylinder 100 may be provided with a plurality of the second suction holes 12 separately so as to increase the intake air amount of the second suction holes 12, and this also enables the size of each of the second suction holes 12 to be appropriately reduced, thus reducing the influence on the intake air of the first suction holes. When the plurality of second air suction holes 12 are arranged along the circumferential direction of the cylinder body 1, the plurality of second air suction holes 12 are sucked simultaneously and closed simultaneously, so that the influence on the first air suction holes is further reduced.
Further, the compression cylinder 100 may be coated with oil on the piston and on the side wall of the working chamber 11 in use, which may be deposited in the lower half of the working chamber 11. The second air intake hole 12 may be penetrated by engine oil when being disposed at the lower half of the sidewall of the cylinder 1, which affects the normal use of the second air intake hole 12. In one embodiment, the cylinder 1 is disposed to extend in a horizontal direction, and the second suction hole 12 is provided at an upper half portion of a sidewall of the cylinder 1, thereby ensuring normal use of the second suction hole 12.
Referring to fig. 4, the present invention also provides a compressor 200 including the compression cylinder 100 according to any of the above embodiments. The compressor 200 achieves double suction through the first suction hole and the second suction hole 12, and reduces an influence on the first suction hole by limiting a size of the second suction hole 12 in the axial direction of the piston. Of course, the compression cylinder 100 may also be used on an engine to increase the intake air amount of the engine and increase the output power of the engine.
The present invention also proposes a refrigeration appliance comprising a compressor 200 as described above. The refrigeration device performs refrigeration by the refrigerant compressed by the compressor 200, so that the refrigeration efficiency is high.
Further, the refrigeration device is a refrigerator. The refrigerator itself has two different air sources of the refrigerating evaporator and the freezing evaporator, and can fully play the double air suction function of the compressor 200. The refrigeration appliance may of course also be an air conditioner, not necessarily a refrigerator.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims (11)

1. A compression cylinder, comprising:
a cylinder body, wherein a cylinder cover of the cylinder body is provided with a first air suction hole; the method comprises the steps of,
the piston assembly comprises a piston movably arranged in the cylinder body, and the piston is provided with a first dead center close to a cylinder cover of the cylinder body and a second dead center far away from the cylinder cover of the cylinder body in the moving stroke;
the side wall of the cylinder body is further provided with a second air suction hole, and the size of the second air suction hole in the axial direction of the piston is smaller than that of the second air suction hole in the circumferential direction of the piston.
2. The compression cylinder of claim 1, wherein the second suction hole is elliptically-shaped; or alternatively, the first and second heat exchangers may be,
the second air suction holes are arranged in a long hole.
3. A compression cylinder according to claim 1 or 2, wherein the second suction hole has a length a in the axial direction of the piston and a length b in the circumferential direction of the piston, wherein 0.1. Ltoreq.a/b.ltoreq.1.
4. The compression cylinder of claim 1, wherein the second suction hole has a length a in the axial direction of the piston, and the distance between the first dead point and the second dead point is S, wherein a/S < 0.5.
5. The compression cylinder of claim 1, wherein the second suction port is spaced from the first dead point by a distance L, and the first dead point is spaced from the second dead point by a distance S, wherein 0.5S < L.
6. The compression cylinder of claim 1, wherein the diameter of the cylinder body is D and the cross-sectional area of the second suction hole is s, wherein 0.001 +.s/D 2 ≤1。
7. A compression cylinder according to any one of claims 1 to 6, wherein a plurality of the second suction holes are provided, and a plurality of the second suction holes are provided on a side wall of the cylinder body in a circumferential direction of the cylinder body.
8. The compression cylinder of claim 1, wherein the cylinder body is extended in a horizontal direction, and the second suction hole is provided at an upper half portion of a sidewall of the cylinder body.
9. A compressor comprising a compression cylinder as claimed in any one of claims 1 to 8.
10. A refrigeration apparatus comprising the compressor of claim 9.
11. The refrigeration appliance of claim 10 wherein the refrigeration appliance is a refrigerator.
CN202210155537.XA 2022-02-18 2022-02-18 Compression cylinder, compressor and refrigeration equipment Pending CN116163928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210155537.XA CN116163928A (en) 2022-02-18 2022-02-18 Compression cylinder, compressor and refrigeration equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210155537.XA CN116163928A (en) 2022-02-18 2022-02-18 Compression cylinder, compressor and refrigeration equipment

Publications (1)

Publication Number Publication Date
CN116163928A true CN116163928A (en) 2023-05-26

Family

ID=86420648

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210155537.XA Pending CN116163928A (en) 2022-02-18 2022-02-18 Compression cylinder, compressor and refrigeration equipment

Country Status (1)

Country Link
CN (1) CN116163928A (en)

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