A double-cylinder single exhaust device and compressor

Abstract

The application provides a double-cylinder single exhaust device and a compressor comprising the same, the double-cylinder single exhaust device comprising an upper cylinder, a lower cylinder, an intermediate plate, an exhaust port and an exhaust valve, wherein the intermediate plate is provided with a first exhaust passage and a second exhaust passage, the first exhaust passage is in communication with the upper cylinder, and the device is in a first communication state; the second exhaust passage is in communication with the lower cylinder, and the device is in a second communication state; the intermediate plate is further provided with a communication hole vertically penetrating through the intermediate plate, a communication block is slidably arranged in the communication hole, the first communication state and the second communication state are alternately generated when the communication block moves up and down, and the double cylinders are oppositely exhausted. By sharing one set of exhaust system by the double cylinders, the traditional exhaust system of a multi-cylinder compressor is simplified, the cost of the exhaust system is saved, the exhaust resistance of the lower cylinder is reduced, the indicated efficiency is improved, and the noise problem is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of compressors, in particular to an exhaust device and a compressor comprising the same. BACKGROUND

[0002] At present, the exhaust mode of the double-cylinder compressor is generally upper cylinder upper exhaust and lower cylinder lower exhaust, and the exhaust of the upper cylinder and the lower cylinder is realized through independent exhaust systems. Therefore, the traditional multi-cylinder compressor needs at least two or more complete exhaust systems, including valve seats, exhaust races, valve pieces, baffles, etc. The complete exhaust system is high in price, complex in structure, and has a higher failure rate compared with a set of exhaust system, thereby increasing unnecessary costs and risks. At the same time, the two or more exhaust systems affect the performance improvement and are prone to noise problems. SUMMARY

[0003] In view of the defects in the prior art, the purpose of the present application is to provide a double-cylinder single exhaust structure and a compressor. Its structure is simple, and one set of exhaust system cost can be saved for every two cylinders, effectively reducing the cost and failure rate. It is worth noting that the double-cylinder single exhaust structure of the present application is not only suitable for double-cylinder compressors, but also suitable for multi-cylinder compressors.

[0004] The present application provides a double-cylinder single exhaust device, characterized in that it comprises an upper cylinder, a lower cylinder, an intermediate plate, an exhaust port and an exhaust valve, wherein:

[0005] The intermediate plate is located between the upper cylinder and the lower cylinder, and the intermediate plate is provided with a first exhaust passage and a second exhaust passage. When the first exhaust passage is connected to the upper cylinder, the device is in a first connection state; when the second exhaust passage is connected to the lower cylinder, the device is in a second connection state;

[0006] The intermediate plate is also provided with a through hole vertically and throughly, and a through block is slidably arranged in the through hole. When the through block moves up and down, the first connection state and the second connection state occur alternately;

[0007] The exhaust port is arranged on the outside of the intermediate plate, and is used for the upper cylinder and the lower cylinder to exhaust alternately;

[0008] The exhaust valve covers the exhaust port, and the exhaust valve opens outward when the exhaust port exhausts.

[0009] Optionally, the inner wall of the upper cylinder is radially provided with a first exhaust notch;

[0010] The inner wall of the lower cylinder is radially provided with a second exhaust notch;

[0011] The first end of the first exhaust passage is communicated with the first exhaust cutout in the first conducting state, and the third end of the second exhaust passage is communicated with the second exhaust cutout in the second conducting state.

[0012] The exhaust port is communicated with the second end of the first exhaust passage and the fourth end of the second exhaust passage.

[0013] Optionally, the bottom surface of the upper cylinder is attached to the top surface of the intermediate plate, and the first counterbore is arranged at the position corresponding to the conducting hole on the bottom surface of the upper cylinder; correspondingly, the top surface of the lower cylinder is attached to the bottom surface of the intermediate plate, and the second counterbore is arranged at the position corresponding to the conducting hole on the top surface.

[0014] Optionally, the first counterbore is provided with a first opening, and the first opening is communicated with the first exhaust cutout; the second counterbore is provided with a second opening, and the second opening is communicated with the second exhaust cutout.

[0015] Optionally, the first opening is arranged on the top surface of the first counterbore, and the second opening is arranged on the bottom surface of the second counterbore.

[0016] Optionally, the diameter of the first opening is smaller than the diameter of the first counterbore, and the diameter of the second opening is smaller than the diameter of the second counterbore.

[0017] Optionally, the conducting block can be moved upward until the upper end of the conducting block is attached to the first counterbore to close the first exhaust cutout; the conducting block can also be moved downward until the lower end of the conducting block is attached to the second counterbore to close the second exhaust cutout.

[0018] Optionally, the side surface of the conducting hole is communicated with the first exhaust cutout and the second exhaust cutout, respectively.

[0019] Optionally, the side surface of the conducting hole is located on the side close to the inner wall of the upper cylinder and the inner wall of the lower cylinder in the radial direction.

[0020] Optionally, the shape of the upper end of the conducting block and the lower end of the conducting block is a cylinder, a cone, a circular truncated cone, a hemisphere or an ellipsoid, respectively.

[0021] Optionally, the intermediate plate is provided with a three-way air valve, and the three-way air valve has a valve piece; when the upper cylinder is exhausted, the valve piece is opened in the second direction, the first end of the first exhaust passage is connected with the first exhaust cutout, and when the lower cylinder is exhausted, the valve piece is opened in the first direction, the third end of the second exhaust passage is connected with the second exhaust cutout.

[0022] The present application also includes a multi-cylinder compressor provided with the double-cylinder single-exhaust device according to any one of the above.

[0023] The present application has the following beneficial effects compared with the prior art:

[0024] The present application simplifies the traditional complete exhaust system of multi-cylinder compressor by using double-cylinder single exhaust device, and only one set of exhaust system is used for every two cylinders to realize exhaust, thereby saving the cost of exhaust system, improving the cooling capacity and exhaust efficiency, and reducing the noise problem.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings:

[0027] Figure 1 is a top view of the intermediate plate of the present application;

[0028] Figure 2 is a schematic view of the transverse cross section of the upper cylinder of the present application;

[0029] Figure 3 is a schematic view of the longitudinal cross section of an embodiment of the present application;

[0030] Figure 4 is a schematic view of the local longitudinal cross section of the second conduction state of an embodiment of the present application;

[0031] Figure 5 is a schematic view of the local longitudinal cross section of the first conduction state of an embodiment of the present application.

[0032] REFERENCE NUMERALS

[0033] 1 upper cylinder

[0034] 11 first exhaust cutout

[0035] 111 first bevel cutout

[0036] 12 piston

[0037] 2 lower cylinder

[0038] 21 second exhaust cutout

[0039] 211 second bevel cutout

[0040] 3 intermediate plate

[0041] 31 first exhaust passage

[0042] 311 first end

[0043] 312 second end

[0044] 32 second exhaust passage

[0045] 321 third end

[0046] 322 fourth end

[0047] 33 through hole

[0048] 34 through block

[0049] 35 first counterbore

[0050] 36 second counterbore

[0051] 37 interlayer

[0052] 4 exhaust port

[0053] 5 exhaust valve DETAILED DESCRIPTION

[0054] The embodiments of the present application will be described in detail below. Although the present application will be described and explained with additional specificity and detail to enable a fair and clear understanding of the application, it should be understood that the application is not intended to be limited to the specific embodiments described. Modifications or equivalents are intended to be included within the scope of the application.

[0055] In addition, numerous specific details of the application are set forth in the following description in order to provide a thorough understanding of the application. Those skilled in the art will understand, however, that the application can be practiced without these specific details. In other instances, well-known structures and components are not described in detail in order to avoid obscuring the application.

[0056] The "vertical" direction herein refers to the axial direction of the compressor, the "horizontal" plane refers to a plane parallel to the cross section of the cylinder, and the "outward" direction refers to the radial outward direction of the cylinder.

[0057] To solve the above technical problems, the present application provides a double-cylinder single-exhaust device, characterized in that it comprises an upper cylinder 1, a lower cylinder 2, an intermediate plate 3, an exhaust port 4, and an exhaust valve 5, wherein:

[0058] The inner wall of the upper cylinder 1 is provided with a first exhaust cutout 11 in the radial direction;

[0059] The inner wall of the lower cylinder 2 is provided with a second exhaust cutout 21 in the radial direction;

[0060] The intermediate plate 3 is located between the upper cylinder 1 and the lower cylinder 2, and is provided with a first exhaust passage 31 and a second exhaust passage 32. The first end 311 of the first exhaust passage 31 is connected to the first exhaust cutout 11, and the third end 321 of the second exhaust passage 32 is connected to the second exhaust cutout 21.

[0061] The exhaust port 4 is arranged on the outer side of the intermediate plate 3 and communicates with the second end 312 of the first exhaust passage 31 and the fourth end 322 of the second exhaust passage 32 simultaneously;

[0062] The exhaust valve 5 is arranged on the exhaust port 4, and the exhaust valve 5 is opened outward when the exhaust port 4 exhausts.

[0063] As shown in Figure 1 and Figure 2 , the exhaust valve 5 is arranged on the outer periphery of the intermediate plate 3, and the first exhaust passage 31 and the second exhaust passage 32 are arranged in the intermediate plate 3. The first exhaust passage 31 communicates with the inner wall of the upper cylinder 1, and the second exhaust passage 32 communicates with the inner wall of the lower cylinder 2. The crankshaft in the cylinder drives the piston 12 to move counterclockwise, and the space of the exhaust cavity is compressed, and the gas pressure increases. The high-pressure gas fills the first exhaust cutout 11 of the inner wall of the upper cylinder 1 or the second exhaust cutout 21 of the inner wall of the lower cylinder 2. When the piston 12 rotates to the position near the exhaust port 4, the gas pressure in the exhaust cavity reaches the exhaust pressure, the gas in the first exhaust cutout 11 passes through the first exhaust passage 31, and the gas in the second exhaust cutout 21 passes through the second exhaust passage 32, respectively. Push the exhaust valve 5 outward, and alternately exhaust through the exhaust port 4.

[0064] In a further embodiment, as shown in Figures 3 to 5 , the first exhaust passage 31 has a first end 311 and a second end 312, and the second exhaust passage 32 has a third end 321 and a fourth end 322. The first end 311 of the first exhaust passage 31 is connected with the first exhaust cutout 11, and the third end 321 of the second exhaust passage 32 is connected with the second exhaust cutout 21; the exhaust port 4 is arranged on the outer side of the intermediate plate 3 and communicates with the second end 312 of the first exhaust passage 31 and the fourth end 322 of the second exhaust passage 32 simultaneously. When the first end 311 and the second end 312 of the first exhaust passage 31 communicate, the device is in a first conduction state, and the upper cylinder 1 can exhaust outward; as shown in Figure 4 , when the third end 321 and the fourth end 322 of the second exhaust passage 32 communicate, the device is in a second conduction state, and the lower cylinder 2 can exhaust outward. The first conduction state and the second conduction state are alternately realized. This alternating mode is realized by the sliding of a conduction hole 33 and a conduction block 34 located in the conduction hole 33.

[0065] Specifically, the intermediate plate 3 is vertically provided with a conduction hole 33, and the conduction block 34 is arranged in the conduction hole 33 and slides up and down; as shown in Figure 3As shown, the inner diameter of the conducting block 34 is equivalent to the outer diameter of the conducting hole 33, and the conducting block 34 can be gap-contained in the conducting hole 33. Since the conducting hole 33 is in communication with the cylinder, the inner wall of the conducting hole 33 is provided with lubricating oil or other lubricating substances discharged together with the gas in the cylinder, which helps the smooth sliding of the conducting block 34. When the conducting block 34 is located at the lower part of the conducting hole 33, the device is in the first conducting state, and only the first end 311 of the first exhaust passage 31 is in communication with the first exhaust cutout 11. When the conducting block 34 is located at the upper part of the conducting hole 33, the device is in the second conducting state, and only the third end 321 of the second exhaust passage 32 is in communication with the second exhaust cutout 21. When the conducting block 34 moves up and down, the first conducting state and the second conducting state occur alternately. Figure 4 and Figure 5 As shown, the second end 312 of the first exhaust passage 31 and the fourth end 322 of the second exhaust passage 32 are in communication, and both are in communication with the exhaust port 4. The height of the partition layer 37 is less than the height of the conducting block 34, and there is always a gap at the top end and the low end. When the conducting block 34 reciprocates between the first counterbore 35 and the second counterbore 36, the first exhaust passage 31 and the second exhaust passage 32 can be opened by less displacement of the conducting block 34, which is more efficient than the embodiment of Figure 3 .

[0066] Further, the first exhaust cutout 11 is provided with a first inclined cutout 111, and the second exhaust cutout 21 is provided with a second inclined cutout 211, which are used to guide the gas flow of the upper cylinder 1 and the lower cylinder 2 and apply corresponding forces to the conducting block 34. When the upper cylinder 1 is in the exhaust state, the gas in the upper cylinder 1 applies a downward force to the conducting block 34 through the first inclined cutout 111, so that the conducting block 34 moves downward. When the lower cylinder 2 is in the exhaust state, the gas in the lower cylinder 2 applies an upward force to the conducting block 34 through the second inclined cutout 211, so that the conducting block 34 moves upward. The exhaust phases of the upper cylinder 1 and the lower cylinder 2 are opposite, which means that when the upper cylinder 1 is in the exhaust state, the lower cylinder 2 is in the intake cycle, and when the lower cylinder 2 is in the exhaust state, the upper cylinder 1 is in the intake cycle, so as to ensure that the conducting block 34 will only be subjected to at most one dominant force at the same time.

[0067] In other embodiments, the bottom surface of the upper cylinder 1 is attached to the top surface of the intermediate plate 3, and the bottom surface of the upper cylinder 1 is provided with a first counterbore 35 at a position corresponding to the conducting hole 33. Correspondingly, the top surface of the lower cylinder 2 is attached to the bottom surface of the intermediate plate 3, and the top surface is provided with a second counterbore 36 at a position corresponding to the conducting hole 33. Optionally, the first counterbore 35 is in communication with the first exhaust cutout 11, and the first exhaust cutout 11 has a first inclined cutout 111. The second counterbore 36 is in communication with the second exhaust cutout 21, and the second exhaust cutout 21 has a second inclined cutout 211. As shown, Figure 3As shown, when the conducting block 34 is located at the top of the conducting hole 33, the first counterbore 35 is used to accommodate the top of the conducting block 34, and the gas pressure from the first bevel cut 111 exerts a downward force on the side of the top of the conducting block 34; similarly, the second counterbore 36 communicates with the second bevel cut 211, and when the conducting block 34 is located at the bottom of the conducting hole 33, the second counterbore 36 is used to accommodate the bottom of the conducting block 34, and the gas pressure from the second bevel cut 211 exerts an upward force on the side of the bottom of the conducting block 34.

[0068] Optionally, the upper end of the conducting block 34 and the lower end of the conducting block 34 are respectively in the shape of a cylinder, a cone, a circular truncated cone, a hemisphere, or an ellipsoid, but are not limited thereto. Other force-facilitating structures of the conducting block 34 also fall within the protection scope of the present application. In summary, the function of the conducting block 34 is best exerted when it smoothly slides up and down. The sliding power source comes from the combined force of the exhaust gas pressure and gravity.

[0069] In another embodiment, a first opening is provided on the top surface of the first counterbore 35, and a second opening is provided on the bottom surface of the second counterbore 36. A channel is provided between the first exhaust cut 11 and the first opening, and a channel is provided between the second exhaust cut 21 and the second opening. In this way, the necessity of the bevel cut is eliminated, and the gas pressure of the upper cylinder 1 is directed vertically downward, and the gas pressure of the lower cylinder 2 is directed vertically upward, along the first opening and the second opening, respectively, to the upper end and the lower end of the conducting hole 33. The advantage of this is that the bevel cut does not need to be opened at the position where the inner wall of the cylinder adjoins the intermediate plate 3, which does not affect the stability of the cylinder structure, and also avoids the influence of the bevel cut structure on the rotating piston 12 inside the cylinder. Furthermore, the provision of the first opening and the second opening makes the force of the gas on the conducting block 34 vertically downward or upward, rather than the component force of the oblique downward or oblique upward force, which can most quickly open the corresponding exhaust channel. In one of the embodiments, the diameter of the first opening is smaller than the diameter of the first counterbore 35, and the diameter of the second opening is smaller than the diameter of the second counterbore 36. The conducting block 34 can be moved upward until the upper end of the conducting block 34 is in contact with the first counterbore 35, so as to close the first exhaust cut 11; the conducting block 34 can also be moved downward until the lower end of the conducting block 34 is in contact with the second counterbore 36, so as to close the second exhaust cut 21.

[0070] Optionally, the side of the through hole 33 is communicated with the first exhaust cutout 11 and the second exhaust cutout 21 respectively. The side of the through hole 33 is located at the side close to the inner wall of the upper cylinder 1 and the inner wall of the lower cylinder 2 in the radial direction. In other words, the communication between the first exhaust cutout 11 and the through hole 33 is not through the bevel cutout, nor through the first opening located at the top of the first counterbore 35, but the first opening is arranged at the side of the through hole 33; similarly, the communication between the second exhaust cutout 21 and the through hole 33 is not through the bevel cutout, nor through the second opening located at the bottom of the second counterbore 36, but the second opening is arranged at the side of the through hole 33. The advantage of such arrangement is that the travel of the gas flow is shortened, compared with the case that the gas flow is first guided to the upper side or the lower side of the through block 34 and then guided in the vertical direction, the arrangement of the first opening and the second opening at the side of the through hole 33 can effectively shorten the travel of the gas flow, accelerate the opening and closing speed of the exhaust port 4 and the exhaust valve 5, and increase the exhaust volume and the cold power.

[0071] In a further embodiment, the intermediate plate 3 is provided with a three-way valve having a valve plate; when the upper cylinder 1 is exhausted, the valve plate is opened in the second direction, and the first end 311 of the first exhaust passage 31 is connected with the first exhaust cutout 11; when the lower cylinder 2 is exhausted, the valve plate is opened in the first direction, and the third end 321 of the second exhaust passage 32 is connected with the second exhaust cutout 21.

[0072] The embodiments of the present application also provide a multi-cylinder compressor provided with the double-cylinder single-exhaust device of any one of the above.

[0073] In summary, the double-cylinder single-exhaust device of the present application and the compressor comprising the same have the following advantages compared with the prior art:

[0074] I. The traditional complete exhaust system of a double-cylinder or multi-cylinder compressor is simplified, and only one set of exhaust system is used for each two cylinders to realize exhaust, thereby saving the cost of the exhaust system;

[0075] II. The exhaust resistance of the lower cylinder is reduced, the indicated efficiency is improved, and the noise problem is also improved.

[0076] The above is a further detailed description of the present application in combination with specific optional embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be regarded as falling within the protection scope of the present application.

Claims

1. A twin-cylinder single exhaust device characterized by comprising: The device comprises an upper cylinder, a lower cylinder, an intermediate plate, an exhaust port and an exhaust valve, wherein: The intermediate plate is located between the upper cylinder and the lower cylinder, and is provided with a first exhaust passage and a second exhaust passage; when the first exhaust passage is open, the device is in a first open state; when the second exhaust passage is open, the device is in a second open state; The intermediate plate is also vertically provided with a through hole, the inner wall of the through hole is provided with a lubricating substance, and the through hole is slidably provided with a through block; when the through block is driven to move up and down by the combined force of the exhaust gas pressure of the upper cylinder or the lower cylinder and gravity, the first open state and the second open state occur alternately; The exhaust port is arranged on the outer side of the intermediate plate and is in communication with the second end of the first exhaust passage and the fourth end of the second exhaust passage, and is used for the upper cylinder and the lower cylinder to alternately exhaust; The exhaust valve covers the exhaust port, and the exhaust valve opens outward when the exhaust port exhausts.

2. The double-cylinder single-exhaust device according to claim 1, wherein: The inner wall of the upper cylinder is radially provided with a first exhaust notch; The inner wall of the lower cylinder is radially provided with a second exhaust notch; In the first open state, only the first end of the first exhaust passage is in communication with the first exhaust notch, and in the second open state, only the third end of the second exhaust passage is in communication with the second exhaust notch; The exhaust port is in communication with the second end of the first exhaust passage and the fourth end of the second exhaust passage at the same time.

3. The dual cylinder single exhaust apparatus according to claim 2, characterized by The bottom surface of the upper cylinder is attached to the top surface of the intermediate plate, and the bottom surface of the upper cylinder is provided with a first counterbore corresponding to the position of the through hole; correspondingly, the top surface of the lower cylinder is attached to the bottom surface of the intermediate plate, and the top surface is provided with a second counterbore corresponding to the position of the through hole.

4. The dual cylinder single exhaust apparatus according to claim 3, characterized by The first counterbore is provided with a first opening, and the first opening is in communication with the first exhaust notch; the second counterbore is provided with a second opening, and the second opening is in communication with the second exhaust notch.

5. The dual cylinder single exhaust arrangement of claim 4, wherein, The first opening is arranged on the top surface of the first counterbore, and the second opening is arranged on the bottom surface of the second counterbore.

6. The dual cylinder single exhaust arrangement of claim 5, wherein, The diameter of the first opening is smaller than the diameter of the first counterbore, and the diameter of the second opening is smaller than the diameter of the second counterbore.

7. The dual cylinder single exhaust arrangement of claim 3, wherein, The through block can move upwards until the upper end of the through block is attached to the first counterbore to close the first exhaust notch; the through block can also move downwards until the lower end of the through block is attached to the second counterbore to close the second exhaust notch.

8. The dual cylinder single exhaust arrangement of claim 2, wherein, The side surface of the through hole is in communication with the first exhaust notch and the second exhaust notch, respectively.

9. The twin cylinder single exhaust arrangement of claim 8, wherein, The side surface of the through hole is located on the side close to the inner wall of the upper cylinder and the inner wall of the lower cylinder in the radial direction.

10. The dual cylinder single exhaust arrangement of claim 2, wherein, The shape of the upper end of the through block and the lower end of the through block is a cylinder, a cone, a circular truncated cone, a hemisphere or an ellipsoid, respectively.

11. The dual cylinder single exhaust arrangement of claim 2, wherein, The intermediate plate is provided with a three-way air valve having a valve flap; when the upper cylinder is exhausting, the valve flap opens to a second direction, the first end of the first exhaust passage is connected with the first exhaust notch; when the lower cylinder is exhausting, the valve flap opens to a first direction, the third end of the second exhaust passage is connected with the second exhaust notch.

12. A twin cylinder compressor characterized by, The double-cylinder compressor adopts the double-cylinder single-exhaust device according to any one of claims 1 to 11.

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