Shared cylinder cover blank and air compressor

Abstract

The invention relates to the field of air compressors, in particular to a shared cylinder cover blank and an air compressor. The shared cylinder cover blank comprises a cover-shaped part and an isolation part; the cover-shaped part is provided with a first exhaust port, a second exhaust port, an inner cavity and a mounting surface for covering the valve plate; the inner cavity is divided into a first chamber, a second chamber, a third chamber, a fourth chamber, a fifth chamber, a sixth chamber and a seventh chamber by the isolation part; there is also a first deformation portion, and the second deformation portion and the third partial isolation portion are defined as a third deformation portion. The shared cylinder cover blank can be applied to a first-stage compressor with two cylinder cavities by configuring the second exhaust port to be communicated with the third cavity and setting the first deformation part and the third deformation part to be separated from the other isolation parts, or the shared cylinder cover blank can be applied to a second-stage compressor with two cylinder cavities by setting the second deformation part to be separated from the other isolation parts. The shared cylinder cover blank can be applied to a two-stage compressor with two cylinder cavities.

Description

Technical Field

[0001] The invention relates to the field of air compressors, in particular to a common cylinder head blank and an air compressor. Background Art

[0002] In the prior art, the structure of the cylinder head of the first-stage compressor and the structure of the cylinder head of the second-stage compressor are completely different;

[0003] If the first-stage compressor has only one compression chamber, then the cylinder head of the first-stage compressor is correspondingly provided with a set of intake passages and a set of exhaust passages, and if the second-stage compressor has two compression chambers, then the second-stage compressor is provided with two sets of intake passages and two sets of exhaust passages; the cylinder head of the first-stage compressor cannot be used on the second-stage compressor because the cylinder head of the first-stage compressor lacks a set of intake passages and a set of exhaust passages that match the second-stage compressor; the cylinder head of the second-stage compressor cannot be used on the first-stage compressor because the cylinder head of the second-stage compressor has an extra set of intake passages and a set of exhaust passages;

[0004] If the first-stage compressor has two compression chambers (respectively the first-stage compression chambers), then the cylinder head of the first-stage compressor is correspondingly provided with two groups of intake passages and two groups of exhaust passages, and if the second-stage compressor has two compression chambers (respectively the first-stage compression chamber and the second-stage compression chamber), then the cylinder of the second-stage compressor is correspondingly provided with two groups of intake passages and two groups of exhaust passages, but the cylinder head of the first-stage compressor cannot be used on the second-stage compressor, and the cylinder head of the second-stage compressor cannot be used on the first-stage compressor because the positional relationship and connection relationship (communication relationship) of the two groups of intake passages and the two groups of exhaust passages of the cylinder head of the first-stage compressor are different from the positional relationship and connection relationship (communication relationship) of the two groups of intake passages and the two groups of exhaust passages of the cylinder head of the second-stage compressor;

[0005] The essential reason for the above phenomenon is that after the cylinder head of the first-stage compressor and the cylinder head of the second-stage compressor are manufactured separately, since the number, positional relationship and connection relationship (connectivity relationship) of the intake channel and the exhaust channel of the cylinder head of the first-stage compressor have formed a fixed structure, and since the number, positional relationship and connection relationship (connectivity relationship) of the intake channel and the exhaust channel of the cylinder head of the second-stage compressor have formed a fixed structure, it is impossible to transform the cylinder head of the first-stage compressor into the cylinder head of the second-stage compressor, nor is it possible to transform the cylinder head of the second-stage compressor into the cylinder head of the first-stage compressor.

[0006] Therefore, how to provide a cylinder head blank, after the cylinder head blank is manufactured, the number, positional relationship and connection relationship of the intake channels of the cylinder head blank can be adaptively modified so that the same cylinder head blank can match the first-stage compressor and the second-stage compressor, becomes a technical problem to be solved. Summary of the invention

[0007] In order to solve the technical problem of how to provide a cylinder head blank, after the cylinder head blank is manufactured, the number, position relationship and connection relationship of the intake channels of the cylinder head blank can be adaptively modified so that the same cylinder head blank can match a first-stage compressor and a second-stage compressor, the present invention provides a common cylinder head blank and an air compressor.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] According to one aspect of the present invention, there is provided a common cylinder head blank, comprising a hood-shaped portion and an isolation portion;

[0010] The cover-like portion is provided with a first exhaust port, a second exhaust port, an inner cavity and a mounting surface for covering the valve plate, the contour of the inner cavity intersects with the mounting surface to form a cover port, and the first exhaust port and the second exhaust port are respectively used to connect the outside of the cover-like portion and the inner cavity;

[0011] The isolation part is arranged in the inner cavity, and the inner cavity is divided into a first chamber, a second chamber, a third chamber, a fourth chamber, a fifth chamber, a sixth chamber and a seventh chamber by the isolation part, wherein the first exhaust port is communicated with the first chamber, the second exhaust port is communicated with the third chamber, and along the direction of the long side of the mounting surface, the first chamber to the fifth chamber are sequentially and mutually isolated by the isolation part, and the sixth chamber and the seventh chamber are mutually isolated and together form a semi-enclosed structure for surrounding the first chamber to the fifth chamber;

[0012] An overflow channel is provided between the second chamber and the fifth chamber, the overflow channel is communicated with the second chamber and the fifth chamber respectively, and the overflow channel is isolated from the third chamber and the fourth chamber respectively;

[0013] The first part of the isolation portion located between the sixth chamber and the third chamber is defined as a first deformation portion, the second part of the isolation portion located between the sixth chamber and the fourth chamber is defined as a second deformation portion, and the third part of the isolation portion located between the fifth chamber and the fourth chamber is defined as a third deformation portion, the first deformation portion, the second deformation portion and the third deformation portion respectively have a fixed state and a separated state relative to the rest of the isolation portion, and the first deformation portion, the second deformation portion and the third deformation portion are respectively configured to be selectively transformed from the fixed state to the separated state.

[0014] According to one aspect of the present invention, there is provided an air compressor, comprising a cylinder head, a valve plate and a crankcase;

[0015] The cylinder head is made of the common cylinder head blank as mentioned above;

[0016] The valve plate is provided with a first air inlet, a first air outlet, a second air inlet, a second air outlet, a first flow guide hole, a second flow guide hole, a third flow guide hole and a fourth flow guide hole;

[0017] The crankcase is provided with a partition plate, the space in the crankcase is divided into a first space and a second space by the partition plate, the crankcase is provided with a positioning surface for being covered by the valve plate, the first space is located between the positioning surface and the partition plate, the contour of the first space intersects with the contour of the positioning surface to form an opening, and the first space is divided into a first air cavity, a second air cavity, a third air cavity, a fourth air cavity, an oil guide cavity, a first cylinder cavity and a second cylinder cavity by a plurality of partition plates;

[0018] When one side of the valve plate covers the mounting surface and the other side of the valve plate covers the positioning surface, along the direction from the cylinder head to the crankcase, the first air inlet is communicated with the first cylinder cavity and the fifth chamber respectively, the first air outlet is communicated with the first cylinder cavity and the seventh chamber respectively, the second air inlet is communicated with the second cylinder cavity and the fourth chamber respectively, the second air outlet is communicated with the second cylinder cavity and the third chamber respectively, the first guide hole is communicated with the first air cavity and the second chamber respectively, the second guide hole is communicated with the second air cavity and the seventh chamber respectively, the third guide hole is communicated with the third air cavity and the first chamber respectively, and the fourth guide hole is communicated with the fourth air cavity and the sixth chamber respectively;

[0019] The first deformable portion and the third deformable portion are respectively separated from the remaining isolation portions, and the second deformable portion is fixed to the remaining isolation portions;

[0020] Alternatively, the second shape-changing portion is in a separated state from the remaining isolation portions, and the first shape-changing portion and the third shape-changing portion are respectively in a fixed state with the remaining isolation portions.

[0021] Furthermore, it also includes a first blocking component;

[0022] The cylinder head is provided with a process hole, and the first blocking component is used to seal the process hole;

[0023] Also includes a second blocking component;

[0024] When the first shape-changing portion and the third shape-changing portion are separated from the remaining isolation portions, and the second shape-changing portion is fixed to the remaining isolation portions, the second blocking member is used to seal the second exhaust port;

[0025] Alternatively, when the second shape-changing portion is separated from the remaining isolation portions, and the first shape-changing portion and the third shape-changing portion are respectively fixed to the remaining isolation portions, the second blocking component is used to seal the first exhaust port.

[0026] Furthermore, it also includes a third blocking component;

[0027] When the second shape-changing portion and the rest of the isolation portion form a separated state, and the first shape-changing portion and the third shape-changing portion and the rest of the isolation portion respectively form a fixed state, the third blocking component is used to seal the third guide hole.

[0028] Furthermore, the crankcase is provided with two air inlets, wherein the first air cavity is located between the two air inlets, and the two air inlets are respectively communicated with the first air cavity;

[0029] A plurality of first filter components manufactured by powder metallurgy are arranged in the first air cavity, wherein a portion of the first filter components are located between one of the air inlets and the first guide hole, and another portion of the first filter components are located between another of the air inlets and the first guide hole.

[0030] Furthermore, the second air cavity and the third air cavity are separated by a plurality of second filter components manufactured by a powder metallurgy process, and the third air cavity and the fourth air cavity are separated by a plurality of third filter components manufactured by a powder metallurgy process;

[0031] A first flow opening is formed between the second filter component and the isolation plate, a second flow opening is formed between the third filter component and the isolation plate, the second air cavity and the third air cavity are in communication through the first flow opening, and the third air cavity and the fourth air cavity are in communication through the second flow opening.

[0032] Furthermore, the first cylinder cavity and the second cylinder cavity are surrounded by the oil guide cavity;

[0033] It also includes an oil pump, an oil outlet channel and an oil inlet channel;

[0034] The oil pump is arranged in the crankcase, and the oil outlet passage is communicated with the oil guide chamber, wherein the oil outlet passage and the isolation plate form an oil outlet;

[0035] The oil inlet channel is communicated with the second space;

[0036] The oil outlet channel and the oil inlet channel are communicated with the oil pump respectively.

[0037] Further, it also includes a crankshaft, a first connecting rod, a second connecting rod and a lubrication channel;

[0038] The first connecting rod and the second connecting rod are respectively hinged to the crankshaft, the first connecting rod extends along the direction from the crankshaft to the first cylinder chamber, and the second connecting rod extends along the direction from the crankshaft to the second cylinder chamber;

[0039] The crankshaft is provided with a crankshaft oil passage, the gap between the first connecting rod and the crankshaft is a first gap, the gap between the second connecting rod and the crankshaft, the lubrication passage is communicated with the crankshaft oil passage, wherein the lubrication passage passes through the isolation plate, and one end of the lubrication passage is communicated with the oil guide chamber.

[0040] Further, it also includes a filter for filtering lubricating oil;

[0041] A filter seat is provided on the crankcase, and the filter is detachably provided on the filter seat, wherein the filter seat is provided with a first oil guide channel and a second oil guide channel, the first oil guide channel is communicated with the oil guide cavity and the filter respectively, and the second oil guide channel is communicated with the filter and the second space respectively.

[0042] Furthermore, an oil storage tank is provided at the bottom of the second space;

[0043] The bottom of the crankcase is provided with heat dissipation ribs.

[0044] The above technical solution has the following advantages or beneficial effects:

[0045] The common cylinder head blank provided by the present invention configures the second exhaust port to be communicated with the third chamber, and sets the first shape-changing portion and the third shape-changing portion and the remaining isolation portions in a separated state, so that the common cylinder head blank can be applied to a first-stage compressor with two cylinder cavities, or sets the second shape-changing portion and the remaining isolation portions in a separated state, so that the common cylinder head blank can be applied to a second-stage compressor with two cylinder cavities, thereby solving the technical problem of how to provide a cylinder head blank, after the cylinder head blank is manufactured, the number, positional relationship and connection relationship of the intake channels of the cylinder head blank can be adaptively modified, so that the same cylinder head blank can match the first-stage compressor and the second-stage compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic structural diagram of a common cylinder head blank provided in an embodiment of the present invention;

[0047] Figure 2 A schematic structural diagram of a common cylinder head blank provided in an embodiment of the present invention;

[0048] Figure 3 A schematic structural diagram of a common cylinder head blank provided in an embodiment of the present invention;

[0049] Figure 4 A schematic structural diagram of a common cylinder head blank provided in an embodiment of the present invention;

[0050] Figure 5 A schematic structural diagram of a common cylinder head blank provided in an embodiment of the present invention;

[0051] Figure 6 A schematic diagram of the structure of an air compressor provided by an embodiment of the present invention;

[0052] Figure 7 A schematic structural diagram of a portion of an air compressor provided in an embodiment of the present invention;

[0053] Figure 8 A schematic structural diagram of a portion of an air compressor provided in an embodiment of the present invention;

[0054] Fig. 9 A schematic structural diagram of a portion of an air compressor provided in an embodiment of the present invention;

[0055] Fig.10 A schematic structural diagram of a portion of an air compressor provided in an embodiment of the present invention;

[0056] Fig.11 A schematic diagram of the structure of a valve plate provided in an embodiment of the present invention;

[0057] Fig.12 A schematic diagram of the structure of a valve plate provided in an embodiment of the present invention;

[0058] Fig.13 A schematic diagram of the structure of a crankcase provided in an embodiment of the present invention;

[0059] Fig.14 A schematic diagram of the structure of a crankcase provided in an embodiment of the present invention;

[0060] Fig.15 A schematic diagram of the structure of a crankcase provided in an embodiment of the present invention;

[0061] Fig.16 A schematic structural diagram of a portion of an air compressor provided in an embodiment of the present invention;

[0062] Fig.17 A schematic structural diagram of a portion of an air compressor provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0063] Embodiment 1:

[0064] In this embodiment, a common cylinder head blank is provided to solve the technical problem of how to provide a cylinder head blank, after which the cylinder head blank can be manufactured, and the number, positional relationship and connection relationship of the intake channels of the cylinder head blank can be adaptively modified so that the same cylinder head blank can match the first-stage compressor and the second-stage compressor.

[0065] For details, see Figures 1 to 5 The common cylinder head blank (hereinafter referred to as cylinder head blank) in this embodiment includes a cover-shaped portion 100 and an isolation portion 200;

[0066] The hood-like portion 100 is provided with a first exhaust port 300, a second exhaust port 400, an inner cavity and a mounting surface 500 for covering the valve plate. The contour of the inner cavity intersects with the mounting surface 500 to form a hood port. The first exhaust port 300 and the second exhaust port 400 are respectively used to connect the outside of the hood-like portion 100 and the inner cavity.

[0067] The isolation part 200 is disposed in the inner cavity, and the inner cavity is partitioned by the isolation part 200 into a first cavity G01, a second cavity G02, a third cavity G03, a fourth cavity G04, a fifth cavity G05, a sixth cavity G06, and a seventh cavity G07, wherein the first exhaust port 300 is communicated with the first cavity G01, and the second exhaust port 400 is communicated with the third cavity G03, and along the direction of the long side of the mounting surface 500, the first cavity G01 to the fifth cavity G05 are sequentially and mutually isolated from each other and are partitioned by the isolation part 200, and the sixth cavity G06 and the seventh cavity G07 are mutually isolated and together form a semi-enclosed structure for surrounding the first cavity G01 to the fifth cavity G05;

[0068] A flow passage G08 is provided between the second chamber G02 and the fifth chamber G05. The flow passage G08 communicates with the second chamber G02 and the fifth chamber G05 respectively. The flow passage G08 is isolated from the third chamber G03 and the fourth chamber G04 respectively.

[0069] The first partial isolation portion 200 located between the sixth chamber G06 and the third chamber G03 is defined as the first transformation portion B01, the second partial isolation portion 200 located between the sixth chamber G06 and the fourth chamber G04 is defined as the second transformation portion B02, and the third partial isolation portion 200 located between the fifth chamber G05 and the fourth chamber G04 is defined as the third transformation portion B03. The first transformation portion B01, the second transformation portion B02 and the third transformation portion B03 respectively have a fixed state and a separated state relative to the remaining isolation portions 200, and the first transformation portion B01, the second transformation portion B02 and the third transformation portion B03 are respectively configured to be selectively transitioned from a fixed state to a separated state.

[0070] It should be understood that the terms such as the first-stage compressor, the second-stage compressor, the first-stage air compressor, the second-stage air compressor, the two-stage compressor, the two-stage air compressor, etc. mentioned in this embodiment are actually air compressors.

[0071] In this embodiment, a scenario in which the cylinder head blank is applied to a first-stage compressor is defined as a first scenario, and a scenario in which the cylinder head blank is applied to a second-stage compressor is defined as a second scenario.

[0072] In the first scene, see Figure 4 or Figure 7 When the cylinder head blank of this embodiment is set on a first-stage compressor, the first transformation portion B01 and the third transformation portion B03 are respectively separated relative to the remaining isolation portion 200, so that the third chamber G03 and the sixth chamber G06 are configured to be in a communicating state, and the fourth chamber G04 and the fifth chamber G05 are configured to be in a communicating state, and the second transformation portion B02 is kept in a fixed state with the remaining isolation portion 200, so that the fourth chamber G04 and the sixth chamber G06 are kept in an isolated state.

[0073] In the first scenario, the function of the second chamber G02 is to guide the air outside the cylinder head blank to the inside of the cylinder head blank; when the cylinder head blank of this embodiment is set on a first-stage air compressor, the second chamber G02 is used to introduce the air outside the air compressor into the inside of the air compressor.

[0074] In the first scene, see Figure 3 The function of the flow channel G08 is to guide the air in the second chamber G02 to the fifth chamber G05; when the cylinder head blank of this embodiment is set on the air compressor, since the fifth chamber G05 is connected with the first cylinder chamber (the first compression chamber) in the crankcase, the second chamber G02, the flow channel G08, and the fifth chamber G05 together constitute the first intake channel for introducing air into the first cylinder chamber.

[0075] When the cylinder head blank in the first scenario is set on the air compressor, and the fourth chamber G04 and the fifth chamber G05 are connected, and the third chamber G03 and the sixth chamber G06 are connected (see Figure 7 ), since the fourth chamber G04 is in communication with the second cylinder chamber (the second compression chamber) in the crankcase, the second chamber G02, the flow passage G08, the fifth chamber G05 and the fourth chamber G04 together constitute a second intake passage for introducing air into the second cylinder chamber;

[0076] When the cylinder head blank in the first scenario is set on the air compressor, and the fourth chamber G04 and the fifth chamber G05 are connected, and the third chamber G03 and the sixth chamber G06 are connected (see Figure 7), since the third chamber G03 is communicated with the second cylinder chamber (the second compression chamber) in the crankcase, the sixth chamber G06 is communicated with the fourth air chamber and the third air chamber in the crankcase, the third air chamber in the crankcase is communicated with the first chamber G01, and the first chamber G01 is communicated with the first exhaust port 300, the third chamber G03, the sixth chamber G06, the first chamber G01 and the first exhaust port 300 are respectively part of the second exhaust channel.

[0077] When the cylinder head blank in the first scenario is set on the air compressor, and the fourth chamber G04 and the fifth chamber G05 are connected, and the third chamber G03 and the sixth chamber G06 are connected (see Figure 7 ), since the seventh chamber G07 is communicated with the first cylinder chamber (the first compression chamber) and the second air chamber of the crankcase respectively, and since the second air chamber of the crankcase is communicated with the third air chamber, and the third air chamber is communicated with the first chamber G01, and the first chamber G01 is communicated with the first exhaust port 300, the seventh chamber G07, the first chamber G01 and the first exhaust port 300 are respectively part of the first exhaust channel.

[0078] When the cylinder head blank in the first scenario is set on the first-stage compressor, the first-stage compressor has two cylinder chambers (see Fig.14 The two cylinder chambers are respectively the first cylinder chamber and the second cylinder chamber; the two cylinder chambers are respectively the first-stage compression chamber; correspondingly, the aforementioned first air inlet passage and the first exhaust passage are respectively communicated with the first cylinder chamber, so that when a negative pressure lower than the atmospheric pressure is generated in the cavity of the first cylinder chamber, the air outside the first-stage compressor is sucked into the first cylinder chamber through the first air inlet passage, and when a positive pressure higher than the atmospheric pressure is generated in the first cylinder chamber, the air in the first cylinder chamber is compressed, and the compressed air is discharged to the outside of the first-stage compressor through the first exhaust passage; similarly, the aforementioned second air inlet passage and the second exhaust passage are respectively communicated with the second cylinder chamber, so that when a negative pressure lower than the atmospheric pressure is generated in the cavity of the second cylinder chamber, the air outside the first-stage compressor is sucked into the second cylinder chamber through the second air inlet passage, and when a positive pressure higher than the atmospheric pressure is generated in the second cylinder chamber, the air in the second cylinder chamber is compressed, and the compressed air is discharged to the outside of the first-stage compressor through the second exhaust passage.

[0079] It should be understood that in the first scenario, see Figure 3 The primary exhaust channel and the secondary exhaust channel respectively have a first chamber G01 and a first exhaust port 300. In other words, the compressed air discharged from the first cylinder chamber and the compressed air discharged from the second cylinder chamber respectively reach the first chamber G01, and the compressed air of the two cylinder chambers is respectively discharged from the first exhaust port 300.

[0080] It should be understood that in the first scenario, when the cylinder head blank is set in the first-stage compressor, the second exhaust port 400 is blocked (see Figure 1 or Figure 5 ) is used to prevent the compressed air from being discharged to the outside of the first-stage compressor through the third chamber G03 and the second exhaust port 400.

[0081] See also Figure 4 or Figure 8 In the second scenario, the second transformation portion B02 is separated from the remaining isolation portion 200, so that the fourth chamber G04 and the sixth chamber G06 are configured to be in a communicating state, and the first transformation portion B01 and the third transformation portion B03 are respectively kept in a fixed state relative to the remaining isolation portion 200, so that the third chamber G03 and the sixth chamber G06 are kept in an isolated state, and the fourth chamber G04 and the fifth chamber G05 are kept in an isolated state.

[0082] In the second scenario, the function of the second chamber G02 is to guide the air outside the cylinder head blank to the inside of the cylinder head blank; when the cylinder head blank of this embodiment is set on a two-stage air compressor, the second chamber G02 is used to introduce the air outside the air compressor into the inside of the air compressor.

[0083] In the second scenario, see Figure 3 The function of the flow channel G08 is to guide the air in the second chamber G02 to the fifth chamber G05; when the cylinder head blank of this embodiment is set on the air compressor, since the fifth chamber G05 is connected with the first cylinder chamber (the first-stage compression chamber) in the crankcase, the second chamber G02, the flow channel G08, and the fifth chamber G05 together constitute the third intake channel for introducing air into the first cylinder chamber.

[0084] When the cylinder head blank in the second scenario is set on the air compressor, and the fourth chamber G04 and the sixth chamber G06 are connected (see Figure 8 ), since the fourth chamber G04 is communicated with the second cylinder chamber (secondary compression chamber) in the crankcase, the sixth chamber G06 is communicated with the fourth air chamber of the crankcase, the fourth air chamber is communicated with the third air chamber and the second air chamber in sequence, and the second air chamber is communicated with the seventh chamber G07, thus, relative to the second cylinder chamber (secondary compression chamber), the seventh chamber G07, the sixth chamber G06 and the fourth chamber G04 are respectively part of the fourth intake passage, and relative to the first cylinder chamber (primary compression chamber), the seventh chamber G07, the sixth chamber G06 and the fourth chamber G04 are respectively part of the third exhaust passage;

[0085] It should be understood that, in the two-stage compressor, the third exhaust passage and the fourth exhaust passage mentioned above are the same passage, which is essentially an interstage passage for connecting the first cylinder chamber and the second cylinder chamber.

[0086] When the cylinder head blank of this embodiment is set on the air compressor, and the fourth chamber G04 and the sixth chamber G06 are connected (see Figure 8 ), since the third chamber G03 is communicated with the second exhaust port 400 and the second cylinder chamber of the crankcase respectively, the third chamber G03 and the second exhaust port 400 constitute a fourth exhaust channel.

[0087] When the cylinder head blank in the second scenario is set on the two-stage compressor, the two-stage compressor has two cylinder chambers (see Fig.14 The two cylinder chambers are respectively the first cylinder chamber and the second cylinder chamber, the first cylinder chamber is the primary compression chamber, and the second cylinder chamber is the secondary compression chamber; correspondingly, the aforementioned third intake channel and the third exhaust channel (i.e., the fourth intake channel) are respectively communicated with the first cylinder chamber, and the aforementioned fourth intake channel (i.e., the third exhaust channel) and the fourth exhaust channel are respectively communicated with the second cylinder chamber, so that when a negative pressure lower than the atmospheric pressure is generated in the first cylinder chamber, the air outside the secondary compressor is sucked into the first cylinder chamber through the third intake channel, when a positive pressure higher than the atmospheric pressure is generated in the first cylinder chamber, and a negative pressure lower than the atmospheric pressure is generated in the second cylinder chamber, the air in the first cylinder chamber is compressed to form primary compressed air, and the compressed air is sucked into the second cylinder chamber through the third exhaust channel (i.e., the fourth intake channel), when a positive pressure higher than the atmospheric pressure and higher than the pressure of the primary compressed air is generated in the second cylinder chamber, the air in the second cylinder chamber forms secondary compressed air, and the secondary compressed air is discharged to the outside of the secondary compressor through the fourth exhaust channel.

[0088] It should be understood that in the second scenario, when the cylinder head blank is arranged in the secondary compressor, the first exhaust port 300 is blocked (see Figure 8 ) is used to prevent the compressed air from being discharged to the outside of the secondary compressor through the first chamber G01 and the first exhaust port 300.

[0089] The common cylinder head blank in this embodiment divides the inner cavity of the hood-shaped portion 100 into the first chamber G01 to the seventh chamber G07 through the isolation portion 200, configures the first exhaust port 300 to communicate with the first chamber G01, and configures the second exhaust port 400 to communicate with the third chamber G03, and by setting the first transformation portion B01 and the third transformation portion B03 and the remaining isolation portion 200 to a separated state, the common cylinder head blank can be used on a first-stage compressor with two cylinder cavities, or, by setting the second transformation portion B02 and the remaining isolation portion 200 to a separated state, the common cylinder head blank can be used on a second-stage compressor with two cylinder cavities, thereby solving the technical problem of how to provide a cylinder head blank, after the cylinder head blank is manufactured, the number, positional relationship and connection relationship of the intake channels of the cylinder head blank can be adaptively modified, so that the same cylinder head blank can match the first-stage compressor and the second-stage compressor.

[0090] Furthermore, in the above solution, the following two methods can be used to realize that the first deformed portion B01, the second deformed portion B02 and the third deformed portion B03 are respectively in a fixed state and a separated state with the remaining isolation portion 200;

[0091] Method 1: the cover-shaped portion 100 and the isolation portion 200 of the cylinder head blank are made in one piece, for example, by using a mold; the first deformed portion B01, the second deformed portion B02 and the third deformed portion B03 are respectively part of the structure of the cylinder head blank; when the cylinder head blank is used for a first-stage compressor, the staff can remove the first deformed portion B01 and the third deformed portion B03 by mechanical processing, such as cutting;

[0092] Method 2: The cover-shaped portion 100 and the isolating portion 200 of the cylinder head blank are made integrally, for example, by using a mold; positioning openings are processed or reserved on the cylinder head blank at the position of the first deformation portion B01, the position of the second deformation portion B02 and the position of the third deformation portion B03, and according to the purpose of the cylinder head blank, the staff can set sealing components and isolating components in the positioning openings; the sealing components include but are not limited to: graphite sealing components or hard rubber sealing components, the isolating components are made of metal or alloy materials, and the sealing components are used to seal the gap between the isolating components and the isolating portion 200 located at the positioning opening; when the cylinder head blank is used for a first-stage compressor, the staff can set the positioning opening of the second deformation portion B02 with the above-mentioned sealing components and isolating components; when the cylinder head blank is used for a second-stage compressor, the staff can set the positioning openings of the first deformation portion B01 and the third deformation portion B03 with the above-mentioned sealing components and isolating components respectively.

[0093] Furthermore, if the cylinder head blank is made by a mold, a process hole 600 must be formed on the isolation portion 200 at the intersection of the first cavity G01 and the second cavity G02 (see Figure 2 or Figure 3 ), the process hole 600 is preferably coaxially arranged with the first exhaust port 300 and the flow passage G08; regardless of whether the cylinder head blank is used in a primary compressor or a secondary compressor, the process hole 600 needs to be blocked (see Figure 7 or Figure 8 ) to prevent air or compressed air from flowing between the first chamber G01 and the second chamber G02 through the process hole 600, thereby avoiding disrupting the flow direction of air or compressed air in the cylinder head blank.

[0094] For further information, see Figure 1 or Figure 2 The cylinder head blank of this embodiment is provided with a first exhaust port 300 and a second exhaust port 400 . The opening direction of the first exhaust port 300 is parallel to the mounting surface 500 , while the opening direction of the second exhaust port 400 is perpendicular to the second mounting surface 500 .

[0095] Embodiment 2:

[0096] See also Figures 1 to 17 In this embodiment, an air compressor is provided, including a cylinder head 1, a valve plate 2 and a crankcase 3;

[0097] The cylinder head 1 is made of the common cylinder head blank as in Embodiment 1;

[0098] The valve plate 2 is provided with a first air inlet F201, a first air outlet F202, a second air inlet F203, a second air outlet F204, a first flow guide hole F205, a second flow guide hole F206, a third flow guide hole F207 and a fourth flow guide hole F208;

[0099] An isolation plate Q31 is provided in the crankcase 3, and the space in the crankcase 3 is divided into a first space and a second space by the isolation plate Q31. The crankcase 3 is provided with a positioning surface Q32 for being covered by the valve plate 2. The first space is located between the positioning surface Q32 and the isolation plate Q31. The contour of the first space intersects with the contour of the positioning surface Q32 to form an opening. The first space is divided into a first air cavity Q311, a second air cavity Q312, a third air cavity Q313, a fourth air cavity Q314, an oil guide cavity Q315, a first cylinder cavity Q316, and a second cylinder cavity Q317 by a plurality of partitions.

[0100] When one side of the valve plate 2 covers the mounting surface 500 and the other side of the valve plate 2 covers the positioning surface Q32, along the direction from the cylinder head 1 to the crankcase 3, the first air inlet hole F201 is communicated with the first cylinder cavity Q316 and the fifth cavity G05 respectively, the first air outlet hole F202 is communicated with the first cylinder cavity Q316 and the seventh cavity G07 respectively, the second air inlet hole F203 is communicated with the second cylinder cavity Q317 and the fourth cavity G04 respectively, and the second air outlet hole F204 is communicated with the second cylinder cavity Q318 and the fourth cavity G05 respectively. The hole F204 is communicated with the second cylinder chamber Q317 and the third chamber G03 respectively, the first guide hole F205 is communicated with the first air chamber Q311 and the second chamber G02 respectively, the second guide hole F206 is communicated with the second air chamber Q312 and the seventh chamber G07 respectively, the third guide hole F207 is communicated with the third air chamber Q313 and the first chamber G01 respectively, and the fourth guide hole F208 is communicated with the fourth air chamber Q314 and the sixth chamber G06 respectively;

[0101] The first deformed portion B01 and the third deformed portion B03 are respectively separated from the remaining isolation portions 200, and the second deformed portion B02 is fixed to the remaining isolation portions 200;

[0102] Alternatively, the second deformed portion B02 is in a separated state from the remaining isolation portions 200 , and the first deformed portion B01 and the third deformed portion B03 are in a fixed state with the remaining isolation portions 200 .

[0103] It should be understood that the terms such as the first-stage compressor, the second-stage compressor, the first-stage air compressor, the second-stage air compressor, the two-stage compressor, the two-stage air compressor, etc. mentioned in this embodiment are actually air compressors.

[0104] It should be understood that when the air compressor is set on the ground, the cylinder head 1 is located on the upper part of the valve plate 2, the crankcase 3 is located on the lower part of the valve plate 2, and the first space is located on the upper part of the isolation plate, and the second space is located on the lower part of the isolation plate; from another perspective, the first space includes the first air cavity Q311, the second air cavity Q312, the third air cavity Q313, the fourth air cavity Q314, the oil guide cavity Q315, the first cylinder cavity Q316 and the second cylinder cavity Q317.

[0105] The cylinder head 1 in this embodiment is made of the cylinder head blank in the aforementioned embodiment 1. For the specific structure, function and technical problems solved by the cylinder head blank, please refer to the aforementioned embodiment 1 and will not be described again here.

[0106] In this embodiment, the cylinder head 1 is configured into two structures, namely, a first cylinder head 1 matched with a first-stage compressor having two cylinder chambers (see Figure 7 ), and a second cylinder head 1 (see Figure 8 ).

[0107] See also Figure 4 or Figure 7 In the first-stage compressor, the first deformation portion B01 and the third deformation portion B03 of the first cylinder head 1 are separated from the remaining isolation portion 200 , and the second deformation portion B02 remains fixed to the remaining isolation portion 200 .

[0108] See also Figure 4 or Figure 8 In the two-stage compressor, the second deformation portion B02 of the second cylinder head 1 is separated from the remaining isolation portion 200, and the first deformation portion B01 and the third deformation portion B03 are respectively kept fixed relative to the remaining isolation portion 200.

[0109] See also Fig.14 , in the first stage compressor, the first cylinder chamber Q316 and the second cylinder chamber Q317 are first stage compression chambers respectively;

[0110] See also Figure 7 , Fig.11 , Fig.14 and Fig.15 , at least the first air guide hole F205, the second chamber G02, the flow passage G08, the fifth chamber G05 and the first air inlet hole F201 form a first air inlet channel, wherein the first air inlet hole F201 is used to connect the fifth chamber G05 and the first cylinder chamber Q316; when a negative pressure lower than the atmospheric pressure is generated in the first cylinder chamber Q316, air is sucked into the first cylinder chamber Q316 from the outside of the first-stage compressor through the first air inlet channel;

[0111] It should be understood that a first valve plate assembly (not shown in the figure) is provided in the first cylinder chamber Q316, and the first valve plate assembly covers the first air inlet hole F201. Therefore, when a negative pressure lower than the atmospheric pressure is generated in the first cylinder chamber Q316, one side of the first valve plate assembly is subjected to the atmospheric pressure, and the other side of the second valve plate assembly is subjected to the negative pressure, so that the second valve plate assembly is deformed to connect the fifth chamber G05 and the first cylinder chamber Q316; conversely, in the process of the negative pressure in the first cylinder chamber Q316 transforming to a positive pressure higher than the atmospheric pressure, the stress of the second valve plate assembly itself causes the second valve plate assembly to restore its initial state, and the second valve plate assembly in the initial state isolates the fifth chamber G05 and the first cylinder chamber Q316.

[0112] See also Figure 7 , Fig.11 , Fig.14 and Fig.15In the first stage compressor, the seventh chamber G07 is communicated with the first cylinder chamber Q316 through the first air outlet hole F202 of the valve plate 2, the seventh chamber G07 is communicated with the second air chamber Q312 of the crankcase 3 through the first guide hole F205 of the valve plate 2, the second air chamber Q312, the third air chamber Q313 and the fourth air chamber Q314 are communicated with each other, the third air chamber Q313 is communicated with the first chamber G01 of the cylinder head 1 through the third guide hole F207 of the valve plate 2, and the first chamber G0 1 is connected to the first exhaust port 300, so that the first air outlet F202, the seventh chamber G07, the first guide hole F205, the second air cavity Q312, the third air cavity Q313, the third guide hole F207, the first chamber G01 and the first exhaust port 300 together constitute the first exhaust channel; when a positive pressure higher than the atmospheric pressure is generated in the first cylinder cavity Q316, the compressed air in the first cylinder cavity Q316 is discharged to the outside of the first-stage compressor through the first exhaust channel;

[0113] It should be understood that a second valve plate assembly (not shown in the figure) is provided in the seventh chamber G07, and the second valve plate assembly covers the first air outlet F202. When a positive pressure higher than the atmospheric pressure is generated in the first cylinder chamber Q316, one side of the second valve plate assembly is subjected to the atmospheric pressure, and the other side of the second valve plate assembly is subjected to the positive pressure, so that the second valve plate assembly is deformed to connect the seventh chamber G07 and the first cylinder chamber Q316; conversely, when the positive pressure in the first cylinder chamber Q316 changes to the atmospheric pressure or to the negative pressure lower than the atmospheric pressure, the stress of the second valve plate assembly itself causes the second valve plate assembly to return to its initial state, and the second valve plate assembly in the initial state is used to isolate the seventh chamber G07 and the first cylinder chamber Q316.

[0114] See also Figure 7 , Fig.11 , Fig.14 and Fig.15 In the first-stage compressor, at least the second chamber G02, the flow passage G08, the fifth chamber G05, the fourth chamber G04 and the second air inlet hole F203 of the valve plate 2 form a second air inlet channel, and the second air inlet hole F203 is used to connect the fourth chamber G04 and the second cylinder chamber Q317; when a negative pressure lower than the atmospheric pressure is generated in the second cylinder chamber Q317, air is sucked into the second cylinder chamber Q317 from the outside of the first-stage compressor through the second air inlet channel;

[0115] It should be understood that a third valve plate assembly (not shown in the figure) is provided in the second cylinder chamber Q317, and the third valve plate assembly covers the second air inlet hole F203. Therefore, when a negative pressure lower than the atmospheric pressure is generated in the second cylinder chamber Q317, one side of the third valve plate assembly receives the atmospheric pressure, and the other side of the third valve plate assembly receives the negative pressure, so that the third valve plate assembly is deformed and connects the fourth chamber G04 and the second cylinder chamber Q317; conversely, in the process of the negative pressure in the second cylinder chamber Q317 transforming to a positive pressure higher than the atmospheric pressure, the stress of the third valve plate assembly itself causes the third valve plate assembly to restore its initial state, and the third valve plate assembly in the initial state isolates the fourth chamber G04 and the second cylinder chamber Q317.

[0116] See also Figure 7 , Fig.11 , Fig.14 and Fig.15 In the first-stage compressor, the third chamber G03 is connected to the second cylinder chamber Q317 through the second air outlet hole F204 of the valve plate 2, the third chamber G03 is connected to the sixth chamber G06, the sixth chamber G06 is connected to the fourth air chamber Q314 of the crankcase 3 through the fourth guide hole F208 of the valve plate 2, the fourth air chamber Q314, the third air chamber Q313 and the second air chamber Q312 are connected in sequence, the third air chamber Q313 is connected to the first chamber G01 through the third guide hole F207 of the valve plate 2, and the first chamber The chamber G01 is connected to the first exhaust port 300, so that the second air outlet F204, the third chamber G03, the sixth chamber G06, the fourth guide hole F208, the fourth air cavity Q314, the third air cavity Q313, the third guide hole F207, the first chamber G01 and the first exhaust port 300 together constitute a second exhaust channel; when a positive pressure higher than the atmospheric pressure is generated in the second cylinder cavity Q317, the compressed air in the second cylinder cavity Q317 is discharged to the outside of the first-stage compressor through the second exhaust channel;

[0117] It should be understood that a fourth valve plate assembly (not shown in the figure) is provided in the third chamber G03, and the fourth valve plate assembly covers the second air outlet F204. When a positive pressure higher than the atmospheric pressure is generated in the second cylinder chamber Q317, one side of the fourth valve plate assembly is subjected to the atmospheric pressure, and the other side of the fourth valve plate assembly is subjected to the positive pressure, so that the fourth valve plate assembly is deformed to connect the third chamber G03 and the second cylinder chamber Q317; conversely, when the positive pressure in the second cylinder chamber Q317 changes to the atmospheric pressure or to the negative pressure lower than the atmospheric pressure, the stress of the fourth valve plate assembly itself causes the fourth valve plate assembly to return to its initial state. The fourth valve plate assembly in the initial state is used to isolate the third chamber G03 and the second cylinder chamber Q317.

[0118] See also Figure 8 , Fig.11 , Fig.14 and Fig.15 , in the two-stage compressor, the first cylinder chamber Q316 is the first-stage compression chamber, and the second cylinder chamber Q317 is the second-stage compression chamber;

[0119] See also Figure 8 , Fig.11 , Fig.14 and Fig.15 , at least the first guide hole F205, the second chamber G02, the flow passage G08, the fifth chamber G05 and the first air inlet hole F201 form a third air inlet channel, wherein the first air inlet hole F201 is used to connect the fifth chamber G05 and the first cylinder chamber Q316; when a negative pressure lower than the atmospheric pressure is generated in the first cylinder chamber Q316, air is sucked into the first cylinder chamber Q316 from the outside of the first-stage compressor through the third air inlet channel;

[0120] It should be understood that a first valve plate assembly (not shown in the figure) is provided in the first cylinder chamber Q316, and the first valve plate assembly covers the first air inlet hole F201. The structure, position, connection relationship and principle of the first valve plate assembly in the two-stage compressor are respectively the same as the structure, position, connection relationship and principle of the first valve plate assembly in the aforementioned one-stage compressor, and will not be repeated here.

[0121] See also Figure 8 , Fig.11 , Fig.14 and Fig.15 In the two-stage compressor, the seventh chamber G07 is communicated with the first cylinder chamber Q316 through the first air outlet hole F202 of the valve plate 2, the seventh chamber G07 is communicated with the second air chamber Q312 of the crankcase 3 through the first guide hole F205 of the valve plate 2, the second air chamber Q312, the third air chamber Q313 and the fourth air chamber Q314 are communicated with each other, the fourth air chamber Q314 is communicated with the sixth chamber G06 through the fourth guide hole F208 of the valve plate 2, the sixth chamber G06 is communicated with the fourth chamber G04, and the fourth chamber G04 is communicated with the second cylinder chamber Q317 through the second air inlet hole F203 of the valve plate 2, so that the first air outlet hole F202, the seventh chamber G07, the first guide hole F205, the second air chamber Q312, the third air chamber Q313 and the fourth air chamber Q314 are communicated with each other, and the fourth air chamber Q314 is communicated with the sixth chamber G06 through the fourth guide hole F208 of the valve plate 2. The cavity Q312, the third air cavity Q313, the fourth air cavity Q314, the fourth guide hole F208, the sixth cavity G06, and the second air inlet hole F203 of the fourth cavity G04 together form an interstage channel; for the first cylinder cavity Q316, the interstage channel is actually the third exhaust channel of the first cylinder cavity Q316, and for the second cylinder cavity Q317, the interstage channel is actually the fourth air inlet channel of the second cylinder cavity Q317; when a positive pressure higher than the atmospheric pressure is generated in the first cylinder cavity Q316 and a negative pressure lower than the atmospheric pressure is generated in the second cylinder cavity Q317, the air in the first cylinder cavity Q316 forms a first-stage compressed air, and the first-stage compressed air is sucked into the second cylinder cavity Q317 through the interstage channel;

[0122] It should be understood that a second valve plate assembly (not shown in the figure) is arranged in the seventh chamber G07, and a third valve plate assembly is arranged in the fourth chamber G04; the structure, position, connection relationship and principle of the second valve plate assembly in the secondary compressor are respectively the same as the structure, position, connection relationship and principle of the second valve plate assembly in the aforementioned primary compressor, and will not be repeated here; similarly, the structure, position, connection relationship and principle of the third valve plate assembly in the secondary compressor are respectively the same as the structure, position, connection relationship and principle of the third valve plate assembly in the aforementioned primary compressor, and will not be repeated here.

[0123] See also Figure 8 , Fig.11 , Fig.14 and Fig.15 In the two-stage compressor, the third chamber G03 is communicated with the second cylinder chamber Q317 through the second air outlet F204 of the valve plate 2, and the third chamber G03 is communicated with the second exhaust port 400, so that the second air outlet F204, the third chamber G03 and the second exhaust port 400 together constitute a fourth exhaust channel; when a positive pressure higher than the atmospheric pressure is generated in the second cylinder chamber Q317, the air in the second cylinder chamber Q317 forms secondary compressed air, and the secondary compressed air is discharged to the outside of the two-stage compressor through the fourth exhaust channel.

[0124] It should be understood that a fourth valve plate assembly (not shown in the figure) is provided in the third chamber G03. The structure, position, connection relationship and principle of the fourth valve plate assembly of the second-stage compressor are respectively the same as the structure, position, connection relationship and principle of the fourth valve plate assembly of the aforementioned first-stage compressor, and will not be repeated here.

[0125] Furthermore, in the aforementioned technical solution, since the cylinder head 1 is made of the cylinder head blank of the aforementioned embodiment 1, and the isolation portion 200 between the first chamber G01 and the second chamber G02 of the cylinder head blank is provided with a process hole 600, in order to prevent air or compressed air from flowing between the first chamber G01 and the second chamber G02 through the process hole 600, it is preferred to adopt the following technical solution to solve this problem.

[0126] See also Figure 2 , Figure 3 , Figure 7 or Figure 8 The air compressor of this embodiment further includes a first blocking component 4;

[0127] A process hole 600 is provided on the cylinder head 1 , and the first blocking component 4 is used for sealing the process hole 600 .

[0128] By sealing the process hole 600 with the first blocking member 4 , it is possible to prevent the air in the second chamber G02 from flowing into the first chamber G01 , and it is also possible to prevent the compressed air in the first chamber G01 from flowing into the second chamber G02 .

[0129] Furthermore, it has been proposed in the aforementioned technical solution that in the primary compressor, the first exhaust channel and the second exhaust channel discharge the compressed air to the outside of the primary compressor through the first exhaust port 300 respectively, and in the secondary compressor, the fourth exhaust channel distributes the secondary compressed air to the outside of the secondary compressor through the second exhaust port 400;

[0130] Since the second exhaust port 400 is in communication with the third chamber G03, and the third chamber G03 is a part of the second exhaust passage of the first-stage compressor, it is necessary to block the second exhaust port 400 on the cylinder head 1 of the first-stage compressor to prevent the compressed air discharged from the second cylinder chamber Q317 from being discharged to the outside of the first-stage compressor through the second exhaust port 400;

[0131] Since the first exhaust port 300 is connected to the first chamber G01, and the first chamber G01 is a part of the interstage channel of the secondary compressor, it is necessary to block the first exhaust port 300 on the cylinder head 1 of the secondary compressor to prevent the first-stage compressed air discharged from the first cylinder chamber Q316 from leaking to the outside of the secondary compressor through the first exhaust port 300.

[0132] See also Figure 1 , Figure 5 or Figure 8 , the air compressor in this embodiment further includes a second blocking component 5;

[0133] When the first deformed portion B01 and the third deformed portion B03 are separated from the remaining isolation portion 200, and the second deformed portion B02 is fixed to the remaining isolation portion 200, the second blocking member 5 is used to seal the second exhaust port 400.

[0134] Alternatively, when the second deformed portion B02 is separated from the remaining isolation portion 200 and the first deformed portion B01 and the third deformed portion B03 are respectively fixed to the remaining isolation portion 200 , the second blocking component 5 is used to seal the first exhaust port 300 .

[0135] By using the second sealing component 5 to seal the first exhaust port 300, it is possible to prevent the compressed air discharged from the first cylinder chamber Q316 of the first compressor and the compressed air discharged from the second cylinder chamber Q317 from leaking to the outside of the compressor through the second exhaust port 400, or it is possible to prevent the first compressed air discharged from the first cylinder chamber Q316 of the second compressor from leaking to the outside of the second compressor through the first exhaust port 300.

[0136] Furthermore, it has been proposed in the aforementioned technical solution that, in the first-stage compressor, the first exhaust channel and the second exhaust channel discharge the compressed air to the outside of the first-stage compressor through the third air cavity Q313, the third guide hole F207, the first chamber G01 and the first exhaust port 300 respectively, while in the second-stage compressor, the third exhaust channel (fourth air intake channel) guides the first-stage compressed air to the second cylinder cavity Q317 through the second guide hole F206, the second air cavity Q312, the third air cavity Q313, the fourth air cavity Q314, the fourth guide hole F208, the sixth chamber G06 and the fourth chamber G04;

[0137] Since the third guide hole F207 is connected to the third air cavity Q313 and the first chamber G01 respectively, and the third air cavity Q313 is a part of the third exhaust passage (fourth intake passage), it is necessary to block the third guide hole F207 on the cylinder head 1 of the secondary compressor to prevent the first-stage compressed air discharged from the first cylinder cavity Q316 from leaking into the first chamber G01 through the third guide hole F207.

[0138] See also Fig.11 or Fig.12 The air compressor of this embodiment further includes a third blocking component 6;

[0139] When the second deformed portion B02 is separated from the remaining isolation portion 200 and the first deformed portion B01 and the third deformed portion B03 are fixed to the remaining isolation portion 200 , the third blocking component 6 is used to seal the third guide hole F207 .

[0140] Using the third blocking component 6 to seal the third guide hole F207 can prevent the first-stage compressed air discharged from the first cylinder chamber Q316 of the secondary compressor from leaking to the first chamber G01 through the third guide hole F207, thereby better preventing the first-stage compressed air from leaking to the outside of the secondary compressor through the first exhaust port 300.

[0141] It should be understood that in other embodiments, the third blocking component 6 can be omitted;

[0142] In this embodiment, the third guide hole F207 is sealed by the third blocking component 6, and the first exhaust port 300 is sealed by the second blocking component 5, so that the first-stage compressed air discharged from the first cylinder chamber Q316 of the second-stage compressor is blocked by the second blocking component 5 and the third blocking component 6, and thus the reliability of the second-stage compressor in preventing the first-stage compressed air from leaking to the outside from the first exhaust port 300 is higher;

[0143] In other embodiments where the third sealing component 6 is omitted, only the second sealing component 5 is required to seal the first exhaust port 300. Although the first-stage compressed air can flow into the first chamber G01 through the third guide hole F207, the first exhaust port 300 blocks the first-stage compressed air from leaking to the outside of the second-stage compressor.

[0144] For further information, see Figure 6 , Fig. 9 , Fig.14 In the air compressor of this embodiment, two air inlets Q33 are provided on the crankcase 3, wherein the first air cavity Q311 is located between the two air inlets Q33, and the two air inlets Q33 are respectively communicated with the first air cavity Q311;

[0145] The first air cavity Q311 is provided with a plurality of first filter components Q34 manufactured by powder metallurgy process (see Fig. 9 ), wherein a portion of the first filter component Q34 is located between one of the air inlets Q33 and the first guide hole F205, and wherein another portion of the first filter component Q34 is located between another of the air inlets Q33 and the first guide hole F205.

[0146] Among them, the two air inlets Q33 are arranged face to face and maintain a certain distance between them. Any air inlet Q33 connects the first air cavity Q311 with the atmosphere. When a negative pressure lower than the atmospheric pressure is generated in the first cylinder cavity Q316 or the second cylinder cavity Q317 of the first-stage compressor or the second-stage compressor, the air located outside the first-stage compressor or the second-stage compressor is sucked into the first air cavity Q311 through the two air inlets Q33, respectively. Then, the air located in the first air cavity Q311 is sucked into the first cylinder cavity Q316 through the aforementioned first air inlet channel or the third air inlet channel, or the air located in the first air cavity Q311 is sucked into the second cylinder cavity Q317 through the aforementioned second air inlet channel. In other words, the two air inlets Q33 are respectively part of the aforementioned first air inlet channel, the second air inlet channel or the third air inlet channel.

[0147] A plurality of first filter components Q34 are arranged in the first air cavity Q311; in a first-stage compressor or a second-stage compressor, it is usually necessary to arrange an external filter component located outside the first-stage compressor or outside the second-stage compressor. If the external filter component fails, for example, the external filter component is a paper filter, the paper filter is soaked in water or is damaged, causing the external filter component to fail, then the plurality of first filter components Q34 located inside the first-stage compressor or the second-stage compressor can replace the external filter component to achieve the effect of air filtration.

[0148] The arrangement of the plurality of first filter components Q34 is preferably as follows:

[0149] See also Fig. 9 , along the direction from the crankcase 3 to the cylinder head 1, multiple first filter components Q34 are vertically arranged in the first air cavity Q311 of the crankcase 3, the bottom and side of any first filter component Q34 are respectively connected to or in close contact with the inner surface of the crankcase 3, and the top of any first filter component Q34 forms a gap with the inner surface of the crankcase 3; any two adjacent first filter components Q34 are configured to be parallel to each other and have a spacing; among the multiple first filter components Q34, at least two of them are close to one of the air inlets Q33, and at least two of them are close to another one of the air inlets Q33.

[0150] The multiple first components adopt the above-mentioned setting method. On the one hand, most of the air sucked into the first air cavity Q311 is filtered by the multiple first filter components Q34. On the other hand, if the multiple first filter components Q34 adsorb more impurities and cause the pores of the multiple first filter components Q34 to be blocked, then the air can continue to circulate through the gaps between the multiple first filter components Q34 and the crankcase 3 to ensure the overall air intake function of the first-stage compressor or the second-stage compressor; in addition, the multiple first filter components Q34 arranged in the first air cavity Q311 also serve as noise reduction components in the first air cavity Q311. The pulse frequency of the air along the direction from the air inlet Q33 to the second chamber G02 is changed by the air flowing through the filter components or the air being blocked by the filter components, thereby reducing the intake noise.

[0151] Since a part of the first filter component Q34 is close to one of the air inlets Q33 and another part of the first filter component Q34 is close to the other air inlet Q33, it is convenient for maintenance personnel to use a pressure cleaning device (such as a spray gun that sprays compressed air) to clean the first filter component Q34 through one of the air inlets Q33, and the air pressure of the compressed air is used to separate impurities from the multiple first filter components Q34. As the compressed air flows, the impurities separated from the multiple first filter components Q34 are discharged from the other air inlet Q33 along with the compressed air.

[0152] The air outside the first-stage compressor or the second-stage compressor is sucked into the first air cavity Q311 through two air inlets Q33, and most of the air in the first air cavity Q311 flows through multiple first filter components Q34, and a small amount of air flows through the gap between the multiple first filter components Q34 and the inner wall of the crankcase 3. Then, the air in the first air cavity Q311 flows into the second chamber G02 of the cylinder head 1 through the first guide hole F205 of the valve plate 2, and continues to flow along the first intake channel, the second intake channel, or the third intake channel.

[0153] For further information, see Fig.10In the air compressor of this embodiment, the second air cavity Q312 and the third air cavity Q313 are separated by a second filter component 7 manufactured by a powder metallurgy process, and the third air cavity Q313 and the fourth air cavity Q314 are separated by a third filter component 8 manufactured by a powder metallurgy process;

[0154] A first flow port Q21 is formed between the second filter component 7 and the isolation plate Q31, a second flow port Q22 is formed between the third filter component 8 and the isolation plate Q31, the second air cavity Q312 and the third air cavity Q313 are in communication through the first flow port Q21, and the third air cavity Q313 and the fourth air cavity Q314 are in communication through the second flow port Q22.

[0155] In terms of the overall structure of the crankcase 3, the second filter component 7 and the third filter component 8 serve as isolation components for separating the second air cavity Q312, the third air cavity Q313 and the fourth air cavity Q314;

[0156] From the perspective of compressed air flow, in the first-stage compressor, the connection between the first exhaust channel and the second exhaust channel is located in the second air cavity Q312 of the crankcase 3, so the second filter component 7 is actually used to filter the compressed air flowing through the first exhaust channel, and the second filter component 7 is actually used to filter the compressed air flowing through the second exhaust channel;

[0157] From the perspective of compressed air flow, in the two-stage compressor, the second air cavity Q312, the third air cavity Q313, and the fourth air cavity Q314 are respectively part of the interstage channel, and the second filter component 7 and the third filter component 8 are actually used to filter the compressed air flowing through the interstage channel;

[0158] From the perspective of noise reduction, the second filter component 7 and the third filter component 8 have the same noise reduction effect as the aforementioned first filter component Q34. Specifically, in the first-stage compressor, the second filter component 7 and the third filter component 8 are used to reduce the noise of the compressed air discharged from the first-stage compressor. In the second-stage compressor, the second filter component 7 and the third filter component 8 are used to reduce the noise of the compressed air flowing from the first cylinder chamber Q316 to the second cylinder chamber Q317.

[0159] For further information, see Figures 14 to 17 , in the air compressor of this embodiment, the first cylinder chamber Q316 and the second cylinder chamber Q317 are surrounded by the oil guide chamber Q315;

[0160] It also includes an oil pump 9, an oil outlet channel 10 and an oil inlet channel 11;

[0161] The oil pump 9 is arranged in the crankcase 3, and the oil outlet passage 10 is communicated with the oil guide chamber Q315, wherein the oil outlet passage 10 and the isolation plate Q31 form an oil outlet;

[0162] The oil inlet channel 11 is communicated with the second space;

[0163] The oil outlet passage 10 and the oil inlet passage 11 are communicated with the oil pump 9 respectively.

[0164] In this embodiment, since the first cylinder chamber Q316 and the second cylinder chamber Q317 are respectively arranged in the crankcase 3, when compressed air is generated in the first cylinder chamber Q316 and the second cylinder chamber Q317, it is necessary to consider cooling the first cylinder chamber Q316 and the second cylinder chamber Q317 to reduce the temperature of the compressed air.

[0165] In the present embodiment, oil cooling is adopted to cool the first cylinder cavity Q316 and the second cylinder cavity Q317. Specifically, lubricating oil is injected into the oil guide cavity Q315 surrounding the first cylinder cavity Q316 and the second cylinder cavity Q317 through the oil pump 9. The lubricating oil contacts the outer wall of the first cylinder cavity Q316 and the outer wall of the second cylinder cavity Q317 to form heat exchange. The heat of the first cylinder cavity Q316 and the heat of the second cylinder cavity Q317 are absorbed by the lubricating oil in the oil guide cavity Q315. As the oil pump 9 continuously injects lubricating oil into the oil guide cavity Q315, and the lubricating oil in the oil guide cavity Q315 is continuously discharged from the oil guide cavity Q315, the lubricating oil absorbs the heat of the two cylinder cavities and flows to the outside of the oil guide cavity Q315. The lubricating oil flowing to the outside of the oil guide cavity Q315 can be naturally cooled.

[0166] In this embodiment, the oil pump 9 adopts a bidirectional oil pump 9 with an eccentric gear, and the bidirectional oil pump 9 can rotate clockwise or counterclockwise, but the bidirectional oil pump 9 can only draw and discharge the lubricating oil along the direction from the channel to the oil outlet channel 10; the specific structure of the bidirectional oil pump 9 is common knowledge known to those skilled in the art. For example, the oil pump 9 in the patent document named "An all-aluminum energy-saving air compressor" with application number 202411246242.9 can be used as the oil pump 9 in this embodiment, and the rest will not be repeated here.

[0167] For further information, see Fig.16 The air compressor of this embodiment further includes a crankshaft 12, a first connecting rod 13, a second connecting rod 14 and a lubrication passage 15;

[0168] The first connecting rod 13 and the second connecting rod 14 are respectively hinged to the crankshaft 12, the first connecting rod 13 extends along the direction of the crankshaft 12 to the first cylinder chamber Q316, and the second connecting rod 14 extends along the direction of the crankshaft 12 to the second cylinder chamber Q317;

[0169] The crankshaft 12 is provided with a crankshaft oil passage 16, the gap between the first connecting rod 13 and the crankshaft 12 is the first gap, the gap between the second connecting rod 14 and the crankshaft 12, and the lubrication passage 15 are communicated with the crankshaft oil passage 16, wherein the lubrication passage 15 passes through the isolation plate Q31, and one end of the lubrication passage 15 is communicated with the oil guide chamber Q315.

[0170] In this embodiment, the crankshaft 12 is provided with a crankshaft oil passage 16, the purpose of which is to introduce external lubricating oil into the crankshaft oil passage 16 for lubricating the hinge formed by the crankshaft 12 and the first connecting rod 13, and for lubricating the hinge formed by the crankshaft 12 and the second connecting rod 14; in addition, through the centrifugal force of the rotation of the crankshaft 12, the lubricating oil in the crankshaft oil passage 16 can form a splash phenomenon from the gap between the crankshaft 12 and the first connecting rod 13, and from the gap between the crankshaft 12 and the second connecting rod 14 through centrifugal force, and the splash phenomenon causes the lubricating oil to be splashed to the inner wall of the first cylinder cavity Q316 and the inner wall of the second cylinder cavity Q317, thereby lubricating the gap between the first piston connected to the first connecting rod 13 and the first cylinder cavity Q316, and lubricating the gap between the second piston connected to the second connecting rod 14 and the second cylinder cavity Q317.

[0171] The lubrication channel 15 is communicated with the aforementioned oil guide chamber Q315, wherein the lubrication channel 15 and the crankcase 3 form two upper and lower openings, the upper opening being exposed in the oil guide chamber Q315, and the lower opening being connected to the oil guide chamber Q315 and communicated with the crankshaft oil passage 16. A portion of the lubrication oil in the oil guide chamber Q315 flows through the lubrication channel 15 to the crankshaft oil passage 16 on the crankshaft 12.

[0172] For further information, see Figure 6 or Fig.17 , the air compressor of this embodiment further includes a filter 17 for filtering lubricating oil;

[0173] A filter seat is provided on the crankcase 3, and the filter 17 is detachably provided on the filter seat, wherein the filter seat is provided with a first oil guide channel 18 and a second oil guide channel 19, the first oil guide channel 18 is communicated with the oil guide chamber Q315 and the filter 17 respectively, and the second oil guide channel 19 is communicated with the filter 17 and the second space respectively.

[0174] The filter 17 can adopt various filters 17 in the prior art, which will not be described here. The lubricating oil in the oil guide cavity Q315 flows into the filter 17 through the first oil guide channel 18, and the lubricating oil is filtered by the filter 17 and flows out of the filter 17 through the second oil guide channel 19; the impurities contained in the lubricating oil are filtered by the filter 17 and retained in the filter 17, and the filter 17 can be cleaned regularly by maintenance personnel.

[0175] For further information, see Fig.16 , the air compressor of this embodiment, an oil storage tank 20 is provided at the bottom of the second space;

[0176] The bottom of the crankcase 3 is provided with heat dissipation ribs 21 .

[0177] The oil storage tank 20 is located at the bottom of the second space of the crankcase 3, and lubricating oil is stored in the oil storage tank 20;

[0178] In the aforementioned solution, the lubricating oil discharged from the filter 17 through the second oil guide channel 19 flows into the oil storage tank 20, and, in the aforementioned solution, the lubricating oil discharged from the gap between the first connecting rod 13 and the crankshaft 12 by the rotational kinetic energy of the crankshaft 12, and the lubricating oil discharged from the gap between the second connecting rod 14 and the crankshaft 12, respectively fall into the oil storage tank 20 under the action of gravity; and, in the aforementioned solution, the lubricating oil in the oil storage tank 20 is drawn by the oil pump 9 and the oil inlet channel 11; the above method makes, The oil storage tank 20, the oil inlet channel 11, the oil pump 9, the oil outlet channel 10, the oil guide chamber Q315, the first oil guide channel 18, the filter 17 and the second oil guide channel 19 together constitute a first lubricating oil circulation path, and the oil storage tank 20, the oil inlet channel 11, the oil pump 9, the oil outlet channel 10, the oil guide chamber Q315, the lubricating channel 15, the crankshaft oil channel 16, the gap between the crankshaft 12 and the first connecting rod 13, and the gap between the crankshaft 12 and the second connecting rod 14 together constitute a second lubricating oil circulation path.

[0179] When the lubricating oil flows through the oil guide chamber Q315, the lubricating oil absorbs the heat of the first cylinder chamber Q316 and the second cylinder chamber Q317, thereby increasing the temperature of the lubricating oil. After the lubricating oil flows from the oil guide chamber Q315 to the oil storage tank 20, the lubricating oil in the oil storage tank 20 forms a heat exchange with the atmosphere through the crankcase 3, thereby reducing the temperature of the lubricating oil in the oil storage tank 20.

[0180] By providing the heat dissipation ribs 21 at the bottom of the crankcase 3 , the contact area between the crankcase 3 and the atmosphere is increased, which is beneficial to improving the heat dissipation efficiency of the lubricating oil in the oil storage tank 20 .

[0181] In addition to the foregoing, the air compressor in this embodiment, the crankcase 3 is also provided with a breathing hole; the breathing hole is arranged on the isolation plate Q31 of the crankcase 3, and the first air cavity Q311 located in the first space is connected to the second space through the breathing hole; when the lubricating oil absorbs the heat of the first cylinder cavity Q316 and the second cylinder cavity Q317 and flows into the oil storage tank 20, the temperature of the lubricating oil in the oil storage tank 20 increases the air pressure of the air in the second space, and the air in the second space is introduced into the first air cavity Q311 through the breathing hole to keep the air pressure of the air in the second space in a balanced state; conversely, when the lubricating oil in the oil storage tank 20 is cooled, the temperature of the air in the second space is reduced, and the air outside the air compressor is introduced into the second space through the air inlet Q33, the first air cavity Q311 and the breathing hole to keep the air pressure of the air in the second space in a balanced state.

[0182] In addition, as mentioned in the foregoing content, a plurality of first filter components Q34 are provided in the first air cavity Q311, and the air outside the air compressor contains water vapor, which can be filtered by the first filter component Q34, wherein when the air flows through the first filter component Q34, the water vapor adheres to the first filter component Q34 to form condensed water; the condensed water flows under the action of gravity and accumulates in the first air cavity Q311, in order to avoid excessive accumulation of condensed water in the first air cavity Q311, the condensed water in the first air cavity Q311 is guided to the second space through the breathing hole, so that the condensed water falls into the oil storage tank 20 under the action of gravity.

[0183] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Common cylinder head blank, characterized in that: comprising a hood-shaped portion and an isolation portion; The cover-like portion is provided with a first exhaust port, a second exhaust port, an inner cavity and a mounting surface for covering the valve plate, the contour of the inner cavity intersects with the mounting surface to form a cover port, and the first exhaust port and the second exhaust port are respectively used to connect the outside of the cover-like portion and the inner cavity; The isolation part is arranged in the inner cavity, and the inner cavity is divided into a first chamber, a second chamber, a third chamber, a fourth chamber, a fifth chamber, a sixth chamber and a seventh chamber by the isolation part, wherein the first exhaust port is communicated with the first chamber, the second exhaust port is communicated with the third chamber, and along the direction of the long side of the mounting surface, the first chamber to the fifth chamber are sequentially and mutually isolated by the isolation part, and the sixth chamber and the seventh chamber are mutually isolated and together form a semi-enclosed structure for surrounding the first chamber to the fifth chamber; An overflow channel is provided between the second chamber and the fifth chamber, the overflow channel is communicated with the second chamber and the fifth chamber respectively, and the overflow channel is isolated from the third chamber and the fourth chamber respectively; The first part of the isolation portion located between the sixth chamber and the third chamber is defined as a first deformation portion, the second part of the isolation portion located between the sixth chamber and the fourth chamber is defined as a second deformation portion, and the third part of the isolation portion located between the fifth chamber and the fourth chamber is defined as a third deformation portion, the first deformation portion, the second deformation portion and the third deformation portion respectively have a fixed state and a separated state relative to the rest of the isolation portion, and the first deformation portion, the second deformation portion and the third deformation portion are respectively configured to be selectively transformed from the fixed state to the separated state.

2. An air compressor, characterized in that: Includes cylinder head, valve plate and crankcase; The cylinder head is made of the common cylinder head blank as claimed in claim 1; The valve plate is provided with a first air inlet, a first air outlet, a second air inlet, a second air outlet, a first flow guide hole, a second flow guide hole, a third flow guide hole and a fourth flow guide hole; The crankcase is provided with a partition plate, the space in the crankcase is divided into a first space and a second space by the partition plate, the crankcase is provided with a positioning surface for being covered by the valve plate, the first space is located between the positioning surface and the partition plate, the contour of the first space intersects with the contour of the positioning surface to form an opening, and the first space is divided into a first air cavity, a second air cavity, a third air cavity, a fourth air cavity, an oil guide cavity, a first cylinder cavity and a second cylinder cavity by a plurality of partition plates; When one side of the valve plate covers the mounting surface and the other side of the valve plate covers the positioning surface, along the direction from the cylinder head to the crankcase, the first air inlet is communicated with the first cylinder cavity and the fifth chamber respectively, the first air outlet is communicated with the first cylinder cavity and the seventh chamber respectively, the second air inlet is communicated with the second cylinder cavity and the fourth chamber respectively, the second air outlet is communicated with the second cylinder cavity and the third chamber respectively, the first guide hole is communicated with the first air cavity and the second chamber respectively, the second guide hole is communicated with the second air cavity and the seventh chamber respectively, the third guide hole is communicated with the third air cavity and the first chamber respectively, and the fourth guide hole is communicated with the fourth air cavity and the sixth chamber respectively; The first deformable portion and the third deformable portion are respectively separated from the remaining isolation portions, and the second deformable portion is fixed to the remaining isolation portions; Alternatively, the second shape-changing portion is in a separated state from the remaining isolation portions, and the first shape-changing portion and the third shape-changing portion are respectively in a fixed state with the remaining isolation portions.

3. The air compressor according to claim 2, characterized in that: Also includes a first blocking component; The cylinder head is provided with a process hole, and the first blocking component is used to seal the process hole; Also includes a second blocking component; When the first shape-changing portion and the third shape-changing portion are separated from the remaining isolation portions, and the second shape-changing portion is fixed to the remaining isolation portions, the second blocking member is used to seal the second exhaust port; Alternatively, when the second shape-changing portion is separated from the remaining isolation portions, and the first shape-changing portion and the third shape-changing portion are respectively fixed to the remaining isolation portions, the second blocking component is used to seal the first exhaust port.

4. The air compressor according to claim 3, characterized in that: Also includes a third blocking component; When the second shape-changing portion and the rest of the isolation portion form a separated state, and the first shape-changing portion and the third shape-changing portion and the rest of the isolation portion respectively form a fixed state, the third blocking component is used to seal the third guide hole.

5. The air compressor according to claim 2, characterized in that: The crankcase is provided with two air inlets, wherein the first air cavity is located between the two air inlets, and the two air inlets are respectively communicated with the first air cavity; A plurality of first filter components manufactured by powder metallurgy are arranged in the first air cavity, wherein a portion of the first filter components are located between one of the air inlets and the first guide hole, and another portion of the first filter components are located between another of the air inlets and the first guide hole.

6. The air compressor according to claim 2, characterized in that: The second air cavity and the third air cavity are separated by a plurality of second filter components manufactured by a powder metallurgy process, and the third air cavity and the fourth air cavity are separated by a plurality of third filter components manufactured by a powder metallurgy process; A first flow opening is formed between the second filter component and the isolation plate, a second flow opening is formed between the third filter component and the isolation plate, the second air cavity and the third air cavity are in communication through the first flow opening, and the third air cavity and the fourth air cavity are in communication through the second flow opening.

7. The air compressor according to claim 2, characterized in that: The first cylinder cavity and the second cylinder cavity are surrounded by the oil guide cavity; It also includes an oil pump, an oil outlet channel and an oil inlet channel; The oil pump is arranged in the crankcase, and the oil outlet passage is communicated with the oil guide chamber, wherein the oil outlet passage and the isolation plate form an oil outlet; The oil inlet channel is communicated with the second space; The oil outlet channel and the oil inlet channel are communicated with the oil pump respectively.

8. The air compressor according to claim 7, characterized in that: Also includes a crankshaft, a first connecting rod, a second connecting rod and a lubrication passage; The first connecting rod and the second connecting rod are respectively hinged to the crankshaft, the first connecting rod extends along the direction from the crankshaft to the first cylinder chamber, and the second connecting rod extends along the direction from the crankshaft to the second cylinder chamber; The crankshaft is provided with a crankshaft oil passage, the gap between the first connecting rod and the crankshaft is a first gap, the gap between the second connecting rod and the crankshaft, the lubrication passage is communicated with the crankshaft oil passage, wherein the lubrication passage passes through the isolation plate, and one end of the lubrication passage is communicated with the oil guide chamber.

9. The air compressor according to claim 7, characterized in that: Also included is a filter for filtering lubricating oil; A filter seat is provided on the crankcase, and the filter is detachably provided on the filter seat, wherein the filter seat is provided with a first oil guide channel and a second oil guide channel, the first oil guide channel is communicated with the oil guide cavity and the filter respectively, and the second oil guide channel is communicated with the filter and the second space respectively.

10. The air compressor according to claim 7, characterized in that: An oil storage tank is provided at the bottom of the second space; The bottom of the crankcase is provided with heat dissipation ribs.

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