Compressor

Abstract

The invention provides a compressor. The compressor comprises an upper cover cap, an upper cylinder cover, an upper cylinder, a middle plate, a lower cylinder, a lower cylinder cover and a lower cover cap which are sequentially stacked; the upper cover cap and the lower cover cap respectively cover the upper cylinder cover and the lower cylinder cover so as to respectively form an upper communicating cavity and a lower communicating cavity, and the upper communicating cavity conveys exhaust gas of the upper cylinder to the back side of the upper blade through the upper tool withdrawal hole so as to provide back pressure; the lower communicating cavity conveys exhaust gas of the lower air cylinder to the back side of the lower blade through the lower tool withdrawal hole so as to provide back pressure. Exhaust gas can be guided to enter the spring hole of the air cylinder from the tool withdrawal hole and then is discharged out of the compressor body, the spring hole is reused as the exhaust hole, high pressure is provided for the back of the blade, installation is convenient, and the structure is reliable.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration equipment, in particular to a compressor. Background Art

[0002] The rolling rotor compressor is a type of positive displacement rotary compressor. The change of the cylinder working volume is achieved by the rolling of the cylindrical rotor (i.e. rolling piston) of the eccentric device installed on the crankshaft in the cylinder. The cavity defined by the cylinder body, rolling piston and cylinder head is called the working chamber, which can be divided into the suction chamber and the compression chamber according to the working state. The working medium enters the suction chamber through the suction hole and is compressed in the compression chamber.

[0003] Compared with rolling rotor compressors with high back pressure inside the shell, rolling rotor compressors with low back pressure (back pressure, i.e. suction pressure) inside the shell have the following advantages: for hydrocarbon refrigerant compressors (such as R290 compressors, where R290 is a new type of environmentally friendly refrigerant), the inside of the compressor shell is suction pressure, and the solubility of refrigerant in refrigeration oil is low, which can significantly reduce the refrigerant charge. Due to its flammable and explosive properties, reducing the refrigerant charge can improve safety and expand the application range of this type of compressor; for high-pressure refrigerant compressors (such as carbon dioxide compressors), the internal pressure of the compressor shell is suction pressure, and the pressure resistance requirement for the shell is low; the compressor motor is inside the shell, the ambient temperature of the compressor shell is low, and the high temperature resistance requirement for the motor is low.

[0004] In order to achieve low back pressure, the existing compressor structure requires the introduction of back pressure for the blades to work, which results in a complex structure and high production costs.

[0005] Therefore, the present invention provides a compressor. Summary of the invention

[0006] In response to the problems in the prior art, the purpose of the present invention is to provide a compressor that overcomes the difficulties of the prior art. It can guide the exhaust gas from the retreat hole into the spring hole of the cylinder and then discharge from the compressor body, and reuse the spring hole as an exhaust hole, thereby providing high pressure for the back of the blade. It is also easy to install and has a reliable structure.

[0007] An embodiment of the present invention provides a compressor, comprising an upper cover, an upper cylinder cover, an upper cylinder, an intermediate plate, a lower cylinder, a lower cylinder cover and a lower cover stacked in sequence;

[0008] The upper cover and the lower cover respectively cover the upper cylinder head and the lower cylinder head to form the upper connecting cavity and the lower connecting cavity respectively. The upper connecting cavity transports the exhaust gas of the upper cylinder to the back side of the upper blade through the upper retreat hole to provide back pressure; the lower connecting cavity transports the exhaust gas of the lower cylinder to the back side of the lower blade through the lower retreat hole to provide back pressure.

[0009] Preferably, the upper cylinder head is provided with an upper exhaust valve and an upper communicating hole;

[0010] The upper cylinder further comprises an upper spring and an upper spring hole, the first end of the upper spring is connected to the upper spring hole, the second end elastically supports the back side of the upper blade, the upper retreat hole is connected to the upper spring hole, and the upper communicating cavity sequentially transports the exhaust gas discharged from the upper cylinder via the upper exhaust valve to the back side of the upper blade via the upper communicating hole and the upper retreat hole;

[0011] The middle plate and the upper cylinder cover jointly clamp the upper cylinder;

[0012] The lower cylinder further comprises a lower spring and a lower spring hole, wherein a first end of the lower spring is connected to the lower spring hole, and a second end elastically supports the back side of the lower blade;

[0013] The lower cylinder head and the middle plate jointly clamp the lower cylinder, and the lower cylinder head is provided with a lower exhaust valve and a lower connecting hole, the lower knife withdrawal hole is connected to the lower spring hole, and the lower connecting cavity transports the exhaust gas discharged from the lower cylinder through the lower exhaust valve to the back side of the lower blade through the lower connecting hole and the lower knife withdrawal hole in sequence.

[0014] Preferably, the middle plate comprises a connecting through hole, and two ends of the connecting through hole are respectively connected to the upper tool withdrawal hole and the lower tool withdrawal hole.

[0015] Preferably, an annular flange protruding upward is provided on the outer periphery of the upper cylinder cover, the upper cover is a disc pressing the annular flange, and the space clamped by the upper cover and the upper cylinder cover forms the upper communicating cavity.

[0016] Preferably, the lower cover comprises a disc and an annular flange protruding upward along the axial direction of the disc edge, the annular flange supports the outer circumference of the lower cylinder head, and the space clamped by the lower cover and the lower cylinder head forms the lower communicating cavity.

[0017] Preferably, the upper relief hole and the lower relief hole at least partially overlap based on the projection of the middle plate.

[0018] Preferably, the axial direction of the upper exhaust valve and the axial direction of the upper communicating hole are parallel to each other;

[0019] The axial direction of the lower exhaust valve and the axial direction of the lower communicating hole are parallel to each other.

[0020] Preferably, the upper connecting hole, the upper tool withdrawal hole, the connecting through hole, the lower tool withdrawal hole and the lower connecting hole are coaxial and have the same diameter.

[0021] Preferably, the axial direction of the upper spring hole is perpendicular to the axial direction of the upper tool withdrawal hole, and the axial direction of the lower spring hole is perpendicular to the axial direction of the lower tool withdrawal hole.

[0022] Preferably, the upper cylinder further comprises an upper exhaust pipe, the outer wall of the upper exhaust pipe is interference fit with the upper spring hole of the upper cylinder, and the first end of the upper spring is interference fit with the outer wall of the end of the upper exhaust pipe;

[0023] The lower cylinder further comprises a lower exhaust pipe, the outer wall of which is interference fit with the lower spring hole of the lower cylinder, and the first end of the lower spring is interference fit with the outer wall of the end of the lower exhaust pipe.

[0024] The compressor of the present invention can guide the exhaust gas to enter the spring hole of the cylinder from the retreat hole and then discharge the compressor body, and reuse the spring hole as the exhaust hole, thereby providing high pressure for the back of the blade, and the installation is convenient and the structure is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0026] Figure 1 is a schematic diagram of a compressor of the present invention.

[0027] Figure 2 for Figure 1 Cross-sectional view along the AA axis.

[0028] Figure 3 It is an enlarged view of the double-cylinder part of the compressor of the present invention.

[0029] Reference numerals

[0030] 1 Housing

[0031] 2 Crankshaft

[0032] 3 Upper cylinder head

[0033] 31 Upper exhaust valve

[0034] 32 Upper connecting hole

[0035] 4 Upper Cylinder

[0036] 41 Upper blade

[0037] 42 Upper spring

[0038] 43 Upper spring hole

[0039] 44 Upper backing hole

[0040] 45 Upper exhaust pipe

[0041] 5 Middle plate

[0042] 51 Connect through hole

[0043] 6 Lower Cylinder

[0044] 61 Lower blade

[0045] 62 Lower spring

[0046] 63 Lower spring hole

[0047] 64 Lower backing hole

[0048] 65 Lower exhaust pipe

[0049] 7 Lower cylinder head

[0050] 71 Lower exhaust valve

[0051] 72 lower connecting hole

[0052] 8 Upper cover

[0053] 81 Upper connecting cavity

[0054] 9 Lower cover

[0055] 91 Lower connecting cavity DETAILED DESCRIPTION

[0056] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through other different specific implementation methods, and the details in the present application can also be modified or changed in various ways according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0057] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in a variety of different forms and is not limited to the embodiments described herein.

[0058] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics represented may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they are contradictory.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0060] In order to clearly describe the present application, components irrelevant to the description are omitted, and the same reference symbols are given to the same or similar components throughout the specification.

[0061] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0062] When a device is said to be "on" another device, it may be directly on the other device, but there may also be other devices between it. In contrast, when a device is said to be "directly" on another device, there are no other devices between it.

[0063] Although the terms first, second, etc. are used to represent various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate the existence of features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0064] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present application. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0065] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with the relevant technical literature and the contents of the current disclosure, and unless defined, shall not be overly interpreted as ideal or very formal meanings.

[0066] Figure 1 2 is a schematic diagram of a compressor according to an embodiment of the present invention. Figure 1 Cross-sectional view along the AA axis. Figure 3 FIG. 1 is an enlarged view of the double-cylinder part of the compressor of the embodiment of the present invention. Figures 1 to 3 As shown, the compressor of the embodiment of the present invention is a twin-cylinder compressor, in which two cylinders driven by a crankshaft 2 are arranged in the housing 1 of the compressor, and the twin-cylinder structure of the compressor mainly comprises: an upper cover 8, an upper cylinder cover 3, an upper cylinder 4, an intermediate plate 5, a lower cylinder 6, a lower cylinder cover 7 and a lower cover 9 stacked in sequence. The upper cover 8 and the lower cover 9 respectively cover the upper cylinder cover 3 and the lower cylinder cover 7 to form an upper connecting cavity 81 and a lower connecting cavity 91, respectively. The upper connecting cavity 81 delivers the exhaust gas of the upper cylinder 4 to the back side of the upper blade 41 through the upper backing hole 44 to provide back pressure. The lower connecting cavity 91 delivers the exhaust gas of the lower cylinder 6 to the back side of the lower blade 61 through the lower backing hole 64 to provide back pressure.

[0067] In a preferred embodiment, the upper cylinder cover 3 is provided with an upper exhaust valve 31 and an upper connecting hole 32. The upper cylinder 4 also includes an upper spring 42 and an upper spring hole 43 for accommodating the upper spring 42. The first end of the upper spring 42 is connected to the upper spring hole 43, and the second end elastically supports the back side of the upper blade 41. The upper backing hole 44 is connected to the upper spring hole 43. The upper connecting cavity 81 transports the exhaust gas discharged from the upper cylinder 4 through the upper exhaust valve 31 to the back side of the upper blade 41 through the upper connecting hole 32 and the upper backing hole 44 in sequence, and uses the upper spring hole 43 as an exhaust hole. The middle plate 5 and the upper cylinder cover 3 jointly clamp the upper cylinder 4. The lower cylinder 6 also includes a lower spring 62 and a lower spring hole 63 for accommodating the lower spring 62. The first end of the lower spring 62 is connected to the lower spring hole 63, and the second end elastically supports the back side of the lower blade 61. The lower cylinder head 7 and the middle plate 5 jointly clamp the lower cylinder 6. The lower cylinder head 7 is provided with a lower exhaust valve 71 and a lower connecting hole 72. The lower knife withdrawal hole 64 is connected to the lower spring hole 63. The lower connecting cavity 91 transports the exhaust gas discharged from the lower cylinder 7 through the lower exhaust valve 71 to the back side of the lower blade 61 through the lower connecting hole 72 and the lower knife withdrawal hole 64 in sequence, and uses the lower spring hole 63 as an exhaust hole, but is not limited to this.

[0068] In a preferred embodiment, the middle plate includes a connecting through hole 51, and both ends of the connecting through hole 51 are connected to the upper retreat hole 44 and the lower retreat hole 64 respectively, but the present invention is not limited thereto.

[0069] In a preferred embodiment, the outer periphery of the upper cylinder head 3 is provided with an upwardly protruding annular flange, the upper cover 8 is a disc pressed on the annular flange, and the space clamped by the upper cover 8 and the upper cylinder head 3 forms an upper connecting cavity 81, but this is not limited to this.

[0070] In a preferred embodiment, the lower cover 9 includes a disc and an annular flange protruding upward along the axial direction of the disc edge, the annular flange supports the outer periphery of the lower cylinder head 7, and the space clamped by the lower cover 9 and the lower cylinder head 7 forms a lower connecting cavity 91, but it is not limited to this.

[0071] In a preferred embodiment, the upper relief hole 44 and the lower relief hole 64 at least partially overlap based on the projection of the middle plate 5 , but the present invention is not limited thereto.

[0072] In a preferred embodiment, the axial direction of the upper exhaust valve 31 and the axial direction of the upper communication hole 32 are parallel to each other. The axial direction of the lower exhaust valve 71 and the axial direction of the lower communication hole 72 are parallel to each other, but not limited thereto.

[0073] In a preferred embodiment, the upper connecting hole 32, the upper tool-retracting hole 44, the connecting through hole 51, the lower tool-retracting hole 64 and the lower connecting hole 72 are coaxial and have the same diameter, but the present invention is not limited thereto.

[0074] In a preferred embodiment, the axial direction of the upper spring hole 43 is perpendicular to the axial direction of the upper tool withdrawal hole 44 , and the axial direction of the lower spring hole 63 is perpendicular to the axial direction of the lower tool withdrawal hole 64 , but this is not limited thereto.

[0075] In a preferred embodiment, the upper cylinder 4 further includes an upper exhaust pipe 45, the outer wall of which is interference fit with the upper spring hole 43 of the upper cylinder 4, and the first end of the upper spring 42 is interference fit with the outer wall of the end of the upper exhaust pipe 45. The lower cylinder 6 further includes a lower exhaust pipe 65, the outer wall of which is interference fit with the lower spring hole 63 of the lower cylinder 6, and the first end of the lower spring 62 is interference fit with the outer wall of the end of the lower exhaust pipe 65, but the present invention is not limited thereto.

[0076] In this embodiment, the upper connecting cavity 81 formed by the upper cover 8 is used to transport the exhaust gas of the upper cylinder 4 to the back side of the upper blade 41 through the upper connecting hole 32 and the upper retreat hole 44 in sequence, providing back pressure for the back side of the upper blade 41. Similarly, the lower connecting cavity 91 formed by the lower cover 9 is used to transport the exhaust gas of the lower cylinder 6 to the back side of the lower blade 61 through the lower connecting hole 72 and the lower retreat hole 64 in sequence, providing back pressure for the back side of the lower blade 61. Subsequently, the high-pressure gas is discharged from the compressor casing 1 by the upper exhaust pipe 45 and the lower exhaust pipe 65 respectively, thereby realizing the back pressure of the blade with a simple structure, reusing the spring hole as the exhaust hole, and being easy to install and having a reliable structure, but not limited to this.

[0077] In summary, the purpose of the present invention is to provide a compressor that can guide the exhaust gas from the retreat hole into the spring hole of the cylinder and then discharge from the compressor body, reuse the spring hole as an exhaust hole, thereby providing high pressure for the back of the blade, and is easy to install and has a reliable structure.

[0078] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A compressor, characterized in that: It comprises an upper cover (8), an upper cylinder cover (3), an upper cylinder (4), an intermediate plate (5), a lower cylinder (6), a lower cylinder cover (7) and a lower cover (9) which are stacked in sequence; An upper cover (8) and a lower cover (9) respectively cover the upper cylinder head (3) and the lower cylinder head (7) to respectively form the upper communicating cavity (81) and the lower communicating cavity (91); the upper communicating cavity (81) transports the exhaust gas of the upper cylinder (4) to the back side of the upper blade (41) through the upper retreat hole (44) to provide back pressure; and the lower communicating cavity (91) transports the exhaust gas of the lower cylinder (6) to the back side of the lower blade (61) through the lower retreat hole (64) to provide back pressure.

2. The compressor according to claim 1, characterized in that: The upper cylinder cover (3) is provided with an upper exhaust valve (31) and an upper communicating hole (32); The upper cylinder (4) further comprises an upper spring (42) and an upper spring hole (43); a first end of the upper spring (42) is connected to the upper spring hole (43), and a second end elastically supports the back side of the upper blade (41); the upper knife-retracting hole (44) is connected to the upper spring hole (43); and the upper communicating cavity (81) transports the exhaust gas discharged from the upper cylinder (4) via the upper exhaust valve (31) to the back side of the upper blade (41) via the upper communicating hole (32) and the upper knife-retracting hole (44) in sequence; The intermediate plate (5) and the upper cylinder cover (3) jointly clamp the upper cylinder (4); The lower cylinder (6) further comprises a lower spring (62) and a lower spring hole (63), wherein a first end of the lower spring (62) is connected to the lower spring hole (63), and a second end elastically supports the back side of the lower blade (61); The lower cylinder cover (7) and the intermediate plate (5) jointly clamp the lower cylinder (6); the lower cylinder cover (7) is provided with a lower exhaust valve (71) and a lower connecting hole (72); the lower knife-retracting hole (64) is connected to the lower spring hole (63); and the lower connecting cavity (91) transports the exhaust gas discharged from the lower cylinder (6) via the lower exhaust valve (71) to the back side of the lower blade (61) via the lower connecting hole (72) and the lower knife-retracting hole (64) in sequence.

3. The compressor according to claim 1, characterized in that: The middle plate comprises a connecting through hole (51), and two ends of the connecting through hole (51) are respectively connected to the upper tool withdrawal hole (44) and the lower tool withdrawal hole (64).

4. The compressor according to claim 1, characterized in that: The outer periphery of the upper cylinder cover (3) is provided with an upwardly protruding annular flange, the upper cover (8) is a disc pressing the annular flange, and the space clamped by the upper cover (8) and the upper cylinder cover (3) forms the upper connecting cavity (81).

5. The compressor according to claim 1, characterized in that: The lower cover (9) comprises a disc and an annular flange protruding upward along the axial direction of the disc edge, the annular flange supports the outer periphery of the lower cylinder cover (7), and the space jointly clamped by the lower cover (9) and the lower cylinder cover (7) forms the lower connecting cavity (91).

6. The compressor according to claim 2, characterized in that: The upper relief hole (44) and the lower relief hole (64) at least partially overlap based on the projection of the middle plate (5).

7. The compressor according to claim 2, characterized in that: The axial direction of the upper exhaust valve (31) and the axial direction of the upper communicating hole (32) are parallel to each other; The axial direction of the lower exhaust valve (71) and the axial direction of the lower communicating hole (72) are parallel to each other.

8. The compressor according to claim 2, characterized in that: The upper connecting hole (32), the upper knife retreat hole (44), the connecting through hole (51), the lower knife retreat hole (64) and the lower connecting hole (72) are coaxial and have the same diameter.

9. The compressor according to claim 2, characterized in that: The axial direction of the upper spring hole (43) is perpendicular to the axial direction of the upper tool withdrawal hole (44), and the axial direction of the lower spring hole (63) is perpendicular to the axial direction of the lower tool withdrawal hole (64).

10. The compressor according to claim 2, characterized in that: The upper cylinder (4) further comprises an upper exhaust pipe (45), the outer wall of the upper exhaust pipe (45) is interference-fitted with the upper spring hole (43) of the upper cylinder (4), and the first end of the upper spring (42) is interference-fitted with the outer wall of the end of the upper exhaust pipe (45); The lower cylinder (6) further comprises a lower exhaust pipe (65), the outer wall of the lower exhaust pipe (65) being interference fit with the lower spring hole (63) of the lower cylinder (6), and the first end of the lower spring (62) being interference fit with the outer wall of the end of the lower exhaust pipe (65).

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