Air suction and exhaust device, compressor and refrigeration equipment

Abstract

The invention provides an air suction and exhaust device, a compressor and refrigeration equipment. The air suction and exhaust device comprises a crankcase; the valve plate is provided with a first air suction port; the first air suction valve plate is arranged on the side, facing the crankcase, of the valve plate, the first air suction valve plate comprises a first valve flap and a second air suction port, the second air suction port is formed in the first valve flap and communicates with the first air suction port, and the first valve flap can move relative to the valve plate; the second air suction valve plate is arranged on the side, facing the crankcase, of the first air suction valve plate, the second air suction valve plate comprises a second valve flap, and the second valve flap can move relative to the valve plate so as to open or close the second air suction port; the rigidity of the second valve flap is smaller than that of the first valve flap, the efficiency of the compressor during low-rotating-speed operation can be improved, the refrigerating capacity of the compressor during high-rotating-speed operation can be improved, and in other words, the performance requirements of the compressor during low rotating speed and high rotating speed are met at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor equipment, and in particular to an air intake and exhaust device, a compressor and a refrigeration device. Background Art

[0002] At present, since the variable frequency compressor requires a higher refrigeration efficiency (COP) at low speed, the bending stiffness of the suction valve plate needs to be low enough, and a larger cooling capacity is required at high speed, so the bending stiffness of the suction valve plate needs to be high enough. The suction assembly structure in the related art generally only has a valve plate and a suction valve plate, which cannot take into account the performance requirements of the variable frequency compressor at low and high speeds at the same time. Summary of the invention

[0003] The embodiments of the present invention are intended to solve at least one of the technical problems existing in the prior art.

[0004] To this end, a first aspect of an embodiment of the present invention provides an air intake and exhaust device.

[0005] A second aspect of an embodiment of the present invention provides a compressor.

[0006] A third aspect of the embodiments of the present invention provides a refrigeration device.

[0007] In view of this, according to a first aspect of an embodiment of the present invention, an intake and exhaust device is provided, which includes: a crankcase; a valve plate, the valve plate is provided with a first intake port; a first intake valve plate, arranged on a side of the valve plate facing the crankcase, the first intake valve plate includes a first valve tongue and a second intake port, the second intake port is arranged on the first valve tongue and is connected to the first intake port, and the first valve tongue can move relative to the valve plate; a second intake valve plate, arranged on a side of the first intake valve plate facing the crankcase, the second intake valve plate includes a second valve tongue, and the second valve tongue can move relative to the valve plate to open or cover the second intake port; wherein the stiffness of the second valve tongue is less than the stiffness of the first valve tongue.

[0008] The intake and exhaust device provided in an embodiment of the present invention includes a crankcase, a valve plate, a first intake valve plate and a second intake valve plate. Specifically, the first intake valve plate is arranged on the side of the valve plate facing the crankcase, and the second intake valve plate is arranged on the side of the first intake valve plate facing the crankcase, that is, the first intake valve plate is arranged between the second intake valve plate and the valve plate.

[0009] The first air inlet valve plate comprises a first valve tongue and a second air inlet, wherein the second air inlet is arranged on the first valve tongue and communicates with the first air inlet. The second air inlet valve plate comprises a second valve tongue, and the second valve tongue can open or cover the second air inlet.

[0010] Since the rigidity of the second valve tongue is less than that of the first valve tongue, when the compressor is running at a low speed, the second valve tongue with smaller rigidity moves to the side away from the valve plate to open the second air intake port. Since the second air intake port is connected to the first air intake port, the refrigerant flows to the compression chamber through the first air intake port and the second air intake port to realize the air intake process. Since the rigidity of the second valve tongue is smaller, it is ensured that the second valve tongue can move quickly to open the second air intake port when the compressor is running at a low speed, thereby improving the efficiency of the compressor at a low speed.

[0011] When the compressor runs at a high speed, the first valve tongue with a larger rigidity and the second valve tongue with a smaller rigidity are opened at the same time, and the refrigerant flows to the compression chamber through the first suction port to realize the suction process. Since the first valve tongue has a larger rigidity, when the first valve tongue and the second valve tongue are opened at the same time, the flutter of the first valve tongue and the second valve tongue can be suppressed, thereby improving the suction flow rate and increasing the cooling capacity of the compressor at a high speed.

[0012] That is to say, by setting two intake valve plates between the crankcase and the valve plate, and the valve tongues on the two intake valve plates have different stiffness, the efficiency of the compressor when running at low speed can be improved, and the cooling capacity of the compressor when running at high speed can be improved, that is, the performance requirements of the compressor at low speed and high speed can be taken into account at the same time.

[0013] In addition, the air intake and exhaust device provided according to the above technical solution of the present invention also has the following additional technical features:

[0014] In some technical solutions, optionally, based on the first valve tongue and the second valve tongue both moving toward a side away from the valve plate, at least a portion of the first valve tongue contacts the second valve tongue.

[0015] In this technical solution, when the compressor runs at a high speed, the first valve tongue and the second valve tongue are opened at the same time, and the refrigerant flows to the compression chamber through the first suction port to realize the suction process. At this time, at least part of the first valve tongue is in contact with the second valve tongue.

[0016] It can be understood that when the first valve tongue and the second valve tongue move toward the side away from the valve plate, the first valve tongue and the second valve tongue bend in the direction away from the valve plate. Since at least part of the first valve tongue and the second valve tongue are in contact, the bending stiffness of the two is superimposed, thereby significantly improving the overall stiffness of the two valve tongues, effectively suppressing the flutter generated when the two valve tongues are opened at the same time, improving the intake flow, and increasing the cooling capacity of the compressor at high speed, thereby meeting the performance requirements of the compressor at high speed.

[0017] In some technical solutions, optionally, the flow area of ​​the second air intake port is smaller than the flow area of ​​the first air intake port.

[0018] In this technical solution, the flow area of ​​the second air inlet is limited to be smaller than the flow area of ​​the first air inlet, that is, the opening area of ​​the second air inlet is smaller than the opening area of ​​the first air inlet, that is, the first valve tongue can partially cover the first air inlet.

[0019] When the compressor is running at high speed, since the first valve tongue partially covers the first suction port, when the refrigerant flows to the first suction port, it can push the first valve tongue to move to the side away from the valve plate so as to open simultaneously with the second valve tongue, thereby increasing the cooling capacity and meeting the performance requirements of the compressor when running at high speed.

[0020] In some technical solutions, optionally, the first air suction valve plate further includes a slit, which is provided on the first valve tongue and passes through the first valve tongue, and the slit is opposite to the second valve tongue.

[0021] In this technical solution, it is defined that the first air intake valve sheet also includes a slit, specifically, the slit is arranged on the first valve tongue, and the slit passes through the first valve tongue. Since the slit is opposite to the second valve tongue, that is, when the second valve tongue closes the second air intake port, the slit can be closed at the same time.

[0022] When the compressor is running at a low speed, due to the slit provided on the first valve tongue, the contact area between the second valve tongue and the first valve tongue can be reduced, thereby eliminating the resistance between the first valve tongue and the second valve tongue that makes it difficult to open the second valve tongue due to the viscosity of the lubricating oil. That is, when the compressor is running at a low speed, the second valve tongue can move quickly to open the second air intake port, thereby improving the efficiency of the compressor when running at a low speed and meeting the performance requirements of the compressor when running at a low speed.

[0023] In some technical solutions, optionally, the first intake valve plate also includes a valve body, and the first valve tongue includes a tongue root portion and a tongue portion, wherein the tongue root portion is connected to the valve body, the tongue portion is connected to the tongue root portion, and the slit is provided in the tongue portion.

[0024] In this technical solution, it is defined that the first valve tongue includes a tongue root portion and a tongue portion. Specifically, the tongue root portion is connected to the valve body, and the tongue portion is connected to the tongue root portion. Since the second valve tongue can move relative to the valve plate to open or cover the second air intake port, that is, the second valve tongue is opposite to the first valve tongue.

[0025] The slit is arranged on the tongue part, that is, the slit corresponds to the position of the second valve tongue part, that is, the slit corresponds to the cantilever end of the second valve tongue. When the compressor runs at a low speed, it can eliminate the resistance between the first valve tongue and the second valve tongue due to the viscosity of the lubricating oil, which makes it difficult to open the second valve tongue. At the same time, it is beneficial to further reduce the opening resistance of the second valve tongue, realize the rapid response of the second valve tongue at low speed, improve the efficiency of the compressor when running at low speed, and meet the performance requirements of the compressor when running at low speed.

[0026] Optionally, the tongue root portion and the tongue portion are an integral structure.

[0027] In some technical solutions, optionally, at least a portion of the slit is located between the outer side of the second air inlet and the outer edge of the first valve tongue.

[0028] In this technical solution, at least part of the slit is limited to be located between the outer side of the second air intake port and the outer edge of the first valve tongue, which is beneficial to further reduce the opening resistance of the second valve tongue, realize the rapid response of the second valve tongue at low speed, improve the efficiency of the compressor when running at low speed, and meet the performance requirements of the compressor when running at low speed.

[0029] In some technical solutions, optionally, the number of the slits is at least two, and the at least two slits are respectively located on both sides of the second air inlet.

[0030] In this technical solution, the number of slits is limited to at least two, specifically, at least two slits are respectively located on both sides of the second air inlet. Optionally, at least two slits are respectively located on two adjacent sides of the second air inlet, for example, slits are respectively provided on the left side and the upper side of the second air inlet. Alternatively, at least two slits are respectively located on two opposite sides of the second air inlet, for example, slits are respectively provided on the left side and the right side of the second air inlet, or slits are respectively provided on the upper side and the lower side of the second air inlet. The specific setting can be made according to actual needs.

[0031] By setting at least two slits, the contact area between the second valve tongue and the first valve tongue can be further reduced, and the resistance between the first valve tongue and the second valve tongue due to the viscosity of the lubricating oil that makes it difficult to open the second valve tongue can be eliminated, thereby achieving rapid response of the second valve tongue at low speed, improving the efficiency of the compressor when running at low speed, and meeting the performance requirements of the compressor when running at low speed.

[0032] In some technical solutions, optionally, at least two slits are respectively located on two opposite sides of the second air inlet.

[0033] In this technical solution, at least two slits are defined to be located on opposite sides of the second air inlet, and optionally, slits are provided on the left and right sides of the second air inlet, or slits are provided on the upper and lower sides of the second air inlet. The slits can be provided specifically according to actual needs. That is, at least two slits are symmetrically provided on both sides of the second air inlet, so that when the compressor is running at a low speed, the opening resistance of the second valve tongue can be reduced, which is conducive to ensuring that the first valve tongue and the second valve tongue are evenly stressed, thereby helping to extend the service life of the first valve tongue and the second valve tongue.

[0034] In some technical schemes, optionally, the first intake valve plate also includes a first opening, and the first valve tongue is arranged at the first opening, and the second intake valve plate also includes a second opening, and the second valve tongue is arranged at the second opening; wherein, based on the first valve tongue and the second valve tongue both moving toward the side away from the valve plate, the first intake port is connected with the second opening through the first opening; based on the second valve tongue moving toward the side away from the valve plate, the first intake port is connected with the second opening through the second intake port.

[0035] In this technical solution, it is defined that the first air intake valve plate also includes a first opening. Specifically, the first valve tongue is arranged at the first opening, and the second valve tongue is arranged at the second opening.

[0036] Specifically, since the rigidity of the second valve tongue is smaller than that of the first valve tongue, when the compressor is running at a low speed, the second valve tongue with smaller rigidity moves to the side away from the valve plate, and the second air intake port is opened. At this time, the second opening is also opened, and the refrigerant flows to the compression chamber through the first air intake port, the second air intake port and the second opening, thus realizing the air intake process. Since the rigidity of the second valve tongue is smaller, it is ensured that the second valve tongue can be opened quickly when the compressor is running at a low speed, thereby improving the efficiency of the compressor at a low speed.

[0037] When the compressor runs at a high speed, the first valve tongue with a larger rigidity and the second valve tongue with a smaller rigidity are opened at the same time, and the refrigerant flows to the compression chamber through the first suction port, the first opening and the second opening to realize the suction process. Since the first valve tongue has a larger rigidity, when the first valve tongue and the second valve tongue are opened at the same time, the flutter of the first valve tongue and the second valve tongue can be suppressed, thereby improving the suction flow rate and increasing the cooling capacity of the compressor at a high speed.

[0038] In some technical schemes, optionally, the intake and exhaust device also includes a first gasket, a cylinder head, a muffler and a second gasket, wherein the first gasket is arranged between the second intake valve plate and the crankcase, the first gasket is provided with a first through hole, the second intake port is opened based on the second valve tongue, the second intake port is connected to the first through hole, the cylinder head is located on the side of the valve plate away from the crankcase, the muffler is arranged on the cylinder head, the muffler includes a muffler outlet, the second gasket is arranged between the valve plate and the cylinder head, the second gasket is provided with a second through hole, and the muffler outlet is connected to the first intake port through the second through hole.

[0039] In this technical solution, it is defined that the intake and exhaust device also includes a first gasket, a cylinder head, a muffler and a second gasket. Specifically, the first gasket is arranged between the second intake valve plate and the crankcase, and the second gasket is arranged between the cylinder head and the valve plate, wherein the first gasket is provided with a first through hole, and the second gasket is provided with a second through hole.

[0040] Specifically, when the compressor is running at a low speed, the second valve tongue with smaller rigidity moves to the side away from the valve plate, and the second air intake port is opened. At this time, the second opening is also opened, and the refrigerant flowing out of the silencer outlet flows through the second through hole, the first air intake port, the second air intake port, the second opening and the first through hole in turn to flow to the compression chamber, thus realizing the air intake process. Since the second valve tongue has a smaller rigidity, it ensures that the second valve tongue can be opened quickly when the compressor is running at a low speed, thereby improving the efficiency of the compressor at a low speed.

[0041] When the compressor runs at a high speed, the first valve tongue with a larger rigidity and the second valve tongue with a smaller rigidity are opened at the same time, and the refrigerant flowing out of the silencer outlet flows through the second through hole, the first air intake port, the first opening, the second opening and the first through hole in turn to flow to the compression chamber to realize the air intake process. Since the first valve tongue has a larger rigidity, when the first valve tongue and the second valve tongue are opened at the same time, the vibration of the first valve tongue and the second valve tongue can be suppressed, thereby improving the air intake flow and increasing the cooling capacity of the compressor at a high speed.

[0042] According to a second aspect of the present invention, a compressor is provided, comprising an intake and exhaust device as provided by any of the above technical solutions, thereby having all the beneficial technical effects of the intake and exhaust device, which will not be repeated here.

[0043] According to a third aspect of the present invention, a refrigeration device is provided, comprising an intake and exhaust device or a compressor as provided by any of the above technical solutions, thereby having all the beneficial technical effects of the intake and exhaust device or the compressor, which will not be repeated here.

[0044] Additional aspects and advantages according to the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0046] Figure 1 An exploded view of an air intake and exhaust device according to an embodiment of the present invention is shown;

[0047] Figure 2 A schematic structural diagram of an air intake and exhaust device according to an embodiment of the present invention is shown;

[0048] Figure 3 Shows Figure 2 An enlarged view of the intake and exhaust device at position A of the illustrated embodiment;

[0049] Figure 4 A schematic structural diagram of a first air intake valve sheet according to an embodiment of the present invention is shown;

[0050] Figure 5 A schematic structural diagram of a second air intake valve sheet according to an embodiment of the present invention is shown;

[0051] Figure 6 A schematic structural diagram of a valve plate according to an embodiment of the present invention is shown;

[0052] Figure 7 A schematic diagram of simulation of the opening states of the first valve tongue and the second valve tongue of the intake and exhaust device according to one embodiment of the present invention when the compressor is running at a low speed is shown;

[0053] Figure 8 A simulation schematic diagram of the opening state of the first valve tongue and the second valve tongue of the intake and exhaust device according to one embodiment of the present invention is shown when the compressor is running at a high speed.

[0054] in, Figures 1 to 8 The corresponding relationship between the reference numerals and the component names is as follows:

[0055] 100 intake and exhaust device, 110 crankcase, 120 valve plate, 121 first intake port, 130 first intake valve plate, 131 first valve tongue, 132 second intake port, 133 slit, 134 valve body, 135 tongue root, 136 tongue portion, 137 first opening, 140 second intake valve plate, 141 second valve tongue, 142 second opening, 150 first gasket, 151 first through hole, 160 cylinder head, 170 muffler, 171 muffler outlet, 180 second gasket, 181 second through hole, 190 exhaust valve plate, 210 lift limiter. DETAILED DESCRIPTION

[0056] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0057] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0058] Refer to the following Figures 1 to 8 The following describes the air intake and exhaust device 100, the compressor and the refrigeration equipment provided according to some embodiments of the present invention.

[0059] In one embodiment according to the present application, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5and Figure 6 As shown, an air intake and exhaust device 100 is proposed, which includes: a crankcase 110; a valve plate 120, wherein the valve plate 120 is provided with a first air intake port 121; a first air intake valve plate 130, which is arranged on the side of the valve plate 120 facing the crankcase 110, and the first air intake valve plate 130 includes a first valve tongue 131 and a second air intake port 132, wherein the second air intake port 132 is arranged on the first valve tongue 131 and is connected to the first air intake port 121, and the first valve tongue 131 can move relative to the valve plate 120; a second air intake valve plate 140, which is arranged on the side of the first air intake valve plate 130 facing the crankcase 110, and the second air intake valve plate 140 includes a second valve tongue 141, and the second valve tongue 141 can move relative to the valve plate 120 to open or cover the second air intake port 132; wherein the stiffness of the second valve tongue 141 is less than the stiffness of the first valve tongue 131.

[0060] The intake and exhaust device 100 provided in the embodiment of the present invention includes a crankcase 110, a valve plate 120, a first intake valve plate 130 and a second intake valve plate 140. Specifically, the first intake valve plate 130 is arranged on the side of the valve plate 120 facing the crankcase 110, and the second intake valve plate 140 is arranged on the side of the first intake valve plate 130 facing the crankcase 110, that is, the first intake valve plate 130 is arranged between the second intake valve plate 140 and the valve plate 120.

[0061] The first air inlet valve plate 130 includes a first valve tongue 131 and a second air inlet 132, wherein the second air inlet 132 is disposed on the first valve tongue 131 and communicates with the first air inlet 121. The second air inlet valve plate 140 includes a second valve tongue 141, which can open or cover the second air inlet 132.

[0062] Since the rigidity of the second valve tongue 141 is less than that of the first valve tongue 131, when the compressor is running at a low speed, the second valve tongue 141 with a smaller rigidity moves to the side away from the valve plate 120 to open the second air intake port 132. Since the second air intake port 132 is connected to the first air intake port 121, the refrigerant flows to the compression chamber through the first air intake port 121 and the second air intake port 132 to realize the air intake process. Since the rigidity of the second valve tongue 141 is smaller, it is ensured that the second valve tongue 141 can move quickly to open the second air intake port 132 when the compressor is running at a low speed, thereby improving the efficiency of the compressor at a low speed.

[0063] When the compressor runs at a high speed, the first valve tongue 131 with a larger rigidity and the second valve tongue 141 with a smaller rigidity are opened at the same time, and the refrigerant flows to the compression chamber through the first suction port 121 to realize the suction process. Since the first valve tongue 131 has a larger rigidity, when the first valve tongue 131 and the second valve tongue 141 are opened at the same time, the vibration of the first valve tongue 131 and the second valve tongue 141 can be suppressed, thereby improving the suction flow rate and increasing the refrigeration capacity of the compressor at a high speed.

[0064] That is to say, by setting two intake valve plates between the crankcase 110 and the valve plate 120, and the valve tongues on the two intake valve plates have different stiffness, the efficiency of the compressor when running at low speed can be improved, and the cooling capacity of the compressor when running at high speed can be improved, that is, the performance requirements of the compressor at low speed and high speed can be taken into account at the same time.

[0065] In some embodiments, optionally, based on the first valve tongue 131 and the second valve tongue 141 both moving toward a side away from the valve plate 120 , at least a portion of the first valve tongue 131 contacts the second valve tongue 141 .

[0066] In this embodiment, when the compressor is running at a high speed, the first valve tongue 131 and the second valve tongue 141 are opened at the same time, and the refrigerant flows to the compression chamber through the first suction port 121 to realize the suction process. At this time, at least part of the first valve tongue 131 is in contact with the second valve tongue 141.

[0067] It can be understood that when the first valve tongue 131 and the second valve tongue 141 move toward the side away from the valve plate 120, the first valve tongue 131 and the second valve tongue 141 bend in the direction away from the valve plate 120. Since at least part of the first valve tongue 131 and the second valve tongue 141 are in contact with each other, the bending stiffness of the two is superimposed, thereby significantly improving the overall stiffness of the two valve tongues, effectively suppressing the flutter generated when the two valve tongues are opened at the same time, improving the intake flow, and increasing the cooling capacity of the compressor at high speed, thereby meeting the performance requirements of the compressor at high speed.

[0068] Figure 7 Schematic diagram of the opening state of the first valve tongue 131 and the second valve tongue 141 of the air intake and exhaust device 100 when the compressor is running at a low speed. Figure 8 FIG. 1 is a schematic diagram of the first valve tongue 131 and the second valve tongue 141 of the air intake and exhaust device 100 when the compressor is running at a high speed. Figure 8 As shown, when the compressor runs at a high speed, the first valve tongue 131 and the second valve tongue 141 are opened at the same time, and the tongue root 135 of the first valve tongue 131 contacts the second valve tongue 141, so that the bending stiffness of the two is superimposed, achieving the effect of suppressing flutter.

[0069] In some embodiments, optionally, the flow area of ​​the second air inlet 132 is smaller than the flow area of ​​the first air inlet 121 .

[0070] In this embodiment, the flow area of ​​the second air inlet 132 is defined to be smaller than the flow area of ​​the first air inlet 121 , that is, the opening area of ​​the second air inlet 132 is smaller than the opening area of ​​the first air inlet 121 , that is, the first valve tongue 131 can partially cover the first air inlet 121 .

[0071] When the compressor is running at high speed, since the first valve tongue 131 partially covers the first air intake port 121, when the refrigerant flows to the first air intake port 121, it can push the first valve tongue 131 to move to the side away from the valve plate 120, so as to open at the same time as the second valve tongue 141, thereby increasing the cooling capacity and meeting the performance requirements of the compressor when running at high speed.

[0072] like Figure 4 As shown, in some embodiments, optionally, the first air suction valve plate 130 further includes a slit 133 , which is disposed on the first valve tongue 131 and passes through the first valve tongue 131 , and the slit 133 is opposite to the second valve tongue 141 .

[0073] In this embodiment, it is defined that the first air suction valve plate 130 further includes a slit 133. Specifically, the slit 133 is provided on the first valve tongue 131, and the slit 133 passes through the first valve tongue 131. Since the slit 133 is opposite to the second valve tongue 141, that is, when the second valve tongue 141 closes the second air suction port 132, the slit 133 can be closed at the same time.

[0074] When the compressor is running at a low speed, due to the arrangement of the slit 133 on the first valve tongue 131, the contact area between the second valve tongue 141 and the first valve tongue 131 can be reduced, thereby eliminating the resistance between the first valve tongue 131 and the second valve tongue 141 that makes it difficult to open the second valve tongue 141 due to the viscosity of the lubricating oil. That is, when the compressor is running at a low speed, the second valve tongue 141 can move quickly to open the second air intake port 132, thereby improving the efficiency of the compressor when running at a low speed and meeting the performance requirements of the compressor when running at a low speed.

[0075] like Figure 4 As shown, in some embodiments, optionally, the first intake valve plate 130 also includes a valve body 134, and the first valve tongue 131 includes a tongue root portion 135 and a tongue portion 136, wherein the tongue root portion 135 is connected to the valve body 134, the tongue portion 136 is connected to the tongue root portion 135, and the slit 133 is provided in the tongue portion 136.

[0076] In this embodiment, the first valve tongue 131 is defined to include a tongue root portion 135 and a tongue portion 136. Specifically, the tongue root portion 135 is connected to the valve body 134, and the tongue portion 136 is connected to the tongue root portion 135. Since the second valve tongue 141 can move relative to the valve plate 120 to open or cover the second air intake port 132, that is, the second valve tongue 141 is opposite to the first valve tongue 131.

[0077] The slit 133 is arranged on the tongue portion 136, that is, the slit 133 corresponds to the position of the head 136 of the second valve tongue 141, that is, the slit 133 corresponds to the cantilever end of the second valve tongue 141. When the compressor runs at a low speed, it can eliminate the resistance between the first valve tongue 131 and the second valve tongue 141 due to the viscosity of the lubricating oil, which makes it difficult to open the second valve tongue 141. At the same time, it is beneficial to further reduce the opening resistance of the second valve tongue 141, thereby achieving a rapid response of the second valve tongue 141 at a low speed, improving the efficiency of the compressor when running at a low speed, and meeting the performance requirements of the compressor when running at a low speed.

[0078] Optionally, the tongue root portion 135 and the tongue portion 136 are an integral structure.

[0079] like Figure 4 As shown, in some embodiments, optionally, at least a portion of the slit 133 is located between the outer side of the second air inlet 132 and the outer edge of the first valve tongue 131 .

[0080] In this embodiment, at least a portion of the slit 133 is defined to be located between the outer side of the second air intake port 132 and the outer edge of the first valve tongue 131, which is beneficial to further reduce the opening resistance of the second valve tongue 141, achieve rapid response of the second valve tongue 141 at low speed, improve the efficiency of the compressor when running at low speed, and meet the performance requirements of the compressor when running at low speed.

[0081] like Figure 4 As shown, in some embodiments, optionally, the number of the slits 133 is at least two, and the at least two slits 133 are respectively located on both sides of the second air inlet 132 .

[0082] In this embodiment, the number of the slits 133 is defined as at least two, specifically, at least two slits 133 are respectively located on both sides of the second air inlet 132. Optionally, at least two slits 133 are respectively located on two adjacent sides of the second air inlet 132, for example, the slits 133 are respectively provided on the left side and the upper side of the second air inlet 132. Alternatively, at least two slits 133 are respectively located on two opposite sides of the second air inlet 132, for example, the slits 133 are respectively provided on the left side and the right side of the second air inlet 132, or the slits 133 are respectively provided on the upper side and the lower side of the second air inlet 132. The specific setting can be made according to actual needs.

[0083] By providing at least two slits 133, it is helpful to further reduce the contact area between the second valve tongue 141 and the first valve tongue 131, eliminate the resistance between the first valve tongue 131 and the second valve tongue 141 that makes it difficult to open the second valve tongue 141 due to the viscosity of the lubricating oil, and achieve a rapid response of the second valve tongue 141 at low speed, thereby improving the efficiency of the compressor when running at low speed and meeting the performance requirements of the compressor when running at low speed.

[0084] like Figure 4 As shown, in some embodiments, optionally, at least two slits 133 are respectively located on two opposite sides of the second air inlet 132 .

[0085] In this embodiment, at least two slits 133 are defined to be located on opposite sides of the second air inlet 132. Optionally, slits 133 are provided on the left and right sides of the second air inlet 132, or slits 133 are provided on the upper and lower sides of the second air inlet 132. The slits 133 can be provided according to actual needs. That is, at least two slits 133 are symmetrically provided on both sides of the second air inlet 132, so that when the compressor is running at a low speed, the opening resistance of the second valve tongue 141 can be reduced, which is conducive to ensuring that the first valve tongue 131 and the second valve tongue 141 are evenly stressed, thereby helping to extend the service life of the first valve tongue 131 and the second valve tongue 141.

[0086] like Figure 4 and Figure 5 As shown, in some embodiments, optionally, the first air intake valve plate 130 also includes a first opening 137, and the first valve tongue 131 is arranged at the first opening 137, and the second air intake valve plate 140 also includes a second opening 142, and the second valve tongue 141 is arranged at the second opening 142; wherein, based on the first valve tongue 131 and the second valve tongue 141 both moving toward the side away from the valve plate 120, the first air intake port 121 is connected with the second opening 142 through the first opening 137; based on the second valve tongue 141 moving toward the side away from the valve plate 120, the first air intake port 121 is connected with the second opening 142 through the second air intake port 132.

[0087] In this embodiment, it is defined that the first air suction valve plate 130 further includes a first opening 137 . Specifically, the first valve tongue 131 is disposed at the first opening 137 , and the second valve tongue 141 is disposed at the second opening 142 .

[0088] Specifically, since the rigidity of the second valve tongue 141 is smaller than that of the first valve tongue 131, when the compressor is running at a low speed, the second valve tongue 141 with smaller rigidity moves to the side away from the valve plate 120, and the second air intake port 132 is opened. At this time, the second opening 142 is also opened, and the refrigerant flows to the compression chamber through the first air intake port 121, the second air intake port 132 and the second opening 142, thus realizing the air intake process. Since the rigidity of the second valve tongue 141 is smaller, it is ensured that the second valve tongue 141 can be opened quickly when the compressor is running at a low speed, thereby improving the efficiency of the compressor at a low speed.

[0089] When the compressor is running at a high speed, the first valve tongue 131 with a larger rigidity and the second valve tongue 141 with a smaller rigidity are opened at the same time, and the refrigerant flows to the compression chamber through the first suction port 121, the first opening 137 and the second opening 142 to realize the suction process. Since the first valve tongue 131 has a larger rigidity, when the first valve tongue 131 and the second valve tongue 141 are opened at the same time, the vibration of the first valve tongue 131 and the second valve tongue 141 can be suppressed, thereby improving the suction flow rate and increasing the cooling capacity of the compressor at a high speed.

[0090] like Figure 1 and Figure 2 As shown, in some embodiments, optionally, the intake and exhaust device 100 also includes a first gasket 150, a cylinder head 160, a muffler 170 and a second gasket 180, wherein the first gasket 150 is arranged between the second intake valve plate 140 and the crankcase 110, the first gasket 150 is provided with a first through hole 151, the second intake port 132 is opened based on the second valve tongue 141, and the second intake port 132 is communicated with the first through hole 151, the cylinder head 160 is located on the side of the valve plate 120 away from the crankcase 110, the muffler 170 is arranged on the cylinder head 160, the muffler 170 includes a muffler outlet 171, the second gasket 180 is arranged between the valve plate 120 and the cylinder head 160, the second gasket 180 is provided with a second through hole 181, and the muffler outlet 171 is communicated with the first intake port 121 through the second through hole 181.

[0091] In this embodiment, it is defined that the intake and exhaust device 100 also includes a first gasket 150, a cylinder head 160, a muffler 170 and a second gasket 180. Specifically, the first gasket 150 is arranged between the second intake valve plate 140 and the crankcase 110, and the second gasket 180 is arranged between the cylinder head 160 and the valve plate 120, wherein the first gasket 150 is provided with a first through hole 151, and the second gasket 180 is provided with a second through hole 181.

[0092] Specifically, when the compressor is running at a low speed, the second valve tongue 141 with a smaller rigidity moves to the side away from the valve plate 120, and the second air intake port 132 is opened. At this time, the second opening 142 is also opened, and the refrigerant flowing out of the silencer outlet 171 flows through the second through hole 181, the first air intake port 121, the second air intake port 132, the second opening 142 and the first through hole 151 in sequence to flow to the compression chamber, thereby realizing the air intake process. Since the second valve tongue 141 has a smaller rigidity, it is ensured that the second valve tongue 141 can be opened quickly when the compressor is running at a low speed, thereby improving the efficiency of the compressor at a low speed.

[0093] When the compressor runs at a high speed, the first valve tongue 131 with a larger rigidity and the second valve tongue 141 with a smaller rigidity are opened at the same time, and the refrigerant flowing out of the silencer outlet 171 flows through the second through hole 181, the first air intake port 121, the first opening 137, the second opening 142 and the first through hole 151 in sequence to flow to the compression chamber to realize the air intake process. Since the first valve tongue 131 has a larger rigidity, when the first valve tongue 131 and the second valve tongue 141 are opened at the same time, the vibration of the first valve tongue 131 and the second valve tongue 141 can be suppressed, thereby improving the air intake flow and increasing the cooling capacity of the compressor at a high speed.

[0094] Optionally, the exhaust device 100 also includes an exhaust valve plate 190 and a lift limiter 210. Specifically, an exhaust port is also provided on the valve plate 120. The exhaust valve plate 190 is used to open or close the exhaust port. The lift limiter 210 is provided on the side of the exhaust valve plate 190 away from the valve plate 120, and is used to limit the bending degree of the exhaust valve plate 190 and extend the service life of the exhaust valve plate 190.

[0095] Optionally, the valve plate 120 is further provided with an exhaust groove, an exhaust flow hole, a screw hole and a limiting hole, and the limiting hole is used for cooperating with the muffler 170 for limiting.

[0096] According to a second aspect of the present invention, a compressor is provided, comprising an intake and exhaust device 100 as provided in any of the above embodiments, thereby having all the beneficial technical effects of the intake and exhaust device 100, which will not be described in detail herein.

[0097] Specifically, the intake and exhaust device 100 includes a crankcase 110, a valve plate 120, a first intake valve plate 130 and a second intake valve plate 140. Specifically, the first intake valve plate 130 is arranged on the side of the valve plate 120 facing the crankcase 110, and the second intake valve plate 140 is arranged on the side of the first intake valve plate 130 facing the crankcase 110, that is, the first intake valve plate 130 is arranged between the second intake valve plate 140 and the valve plate 120.

[0098] The first air inlet valve plate 130 includes a first valve tongue 131 and a second air inlet 132, wherein the second air inlet 132 is disposed on the first valve tongue 131 and communicates with the first air inlet 121. The second air inlet valve plate 140 includes a second valve tongue 141, which can open or cover the second air inlet 132.

[0099] Since the rigidity of the second valve tongue 141 is less than that of the first valve tongue 131, when the compressor is running at a low speed, the second valve tongue 141 with a smaller rigidity moves to the side away from the valve plate 120 to open the second air intake port 132. Since the second air intake port 132 is connected to the first air intake port 121, the refrigerant flows to the compression chamber through the first air intake port 121 and the second air intake port 132 to realize the air intake process. Since the rigidity of the second valve tongue 141 is smaller, it is ensured that the second valve tongue 141 can move quickly to open the second air intake port 132 when the compressor is running at a low speed, thereby improving the efficiency of the compressor at a low speed.

[0100] When the compressor runs at a high speed, the first valve tongue 131 with a larger rigidity and the second valve tongue 141 with a smaller rigidity are opened at the same time, and the refrigerant flows to the compression chamber through the first suction port 121 to realize the suction process. Since the first valve tongue 131 has a larger rigidity, when the first valve tongue 131 and the second valve tongue 141 are opened at the same time, the vibration of the first valve tongue 131 and the second valve tongue 141 can be suppressed, thereby improving the suction flow rate and increasing the refrigeration capacity of the compressor at a high speed.

[0101] That is to say, by setting two intake valve plates between the crankcase 110 and the valve plate 120, and the valve tongues on the two intake valve plates have different stiffness, the efficiency of the compressor when running at low speed can be improved, and the cooling capacity of the compressor when running at high speed can be improved, that is, the performance requirements of the compressor at low speed and high speed can be taken into account at the same time.

[0102] According to a third aspect of the present invention, a refrigeration device is provided, comprising an air intake and exhaust device 100 or a compressor as provided in any of the above embodiments, thereby having all the beneficial technical effects of the air intake and exhaust device 100 or the compressor, which will not be repeated here.

[0103] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0104] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0105] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air intake and exhaust device, characterized in that: include: Crankcase; A valve plate, wherein the valve plate is provided with a first air intake port; a first intake valve plate, arranged on a side of the valve plate facing the crankcase, the first intake valve plate comprising a first valve tongue and a second intake port, the second intake port being arranged on the first valve tongue and communicating with the first intake port, the first valve tongue being able to move relative to the valve plate; a second intake valve plate, disposed on a side of the first intake valve plate facing the crankcase, the second intake valve plate comprising a second valve tongue, the second valve tongue being movable relative to the valve plate to open or cover the second intake port; Wherein, the rigidity of the second valve tongue is smaller than the rigidity of the first valve tongue.

2. The air intake and exhaust device according to claim 1, characterized in that: Based on the first valve tongue and the second valve tongue both moving toward the side away from the valve plate, at least a portion of the first valve tongue contacts the second valve tongue.

3. The air intake and exhaust device according to claim 1 or 2, characterized in that: A flow area of ​​the second air intake port is smaller than a flow area of ​​the first air intake port.

4. The air intake and exhaust device according to claim 1 or 2, characterized in that: The first air intake valve sheet further comprises: A slit is provided on the first valve tongue and passes through the first valve tongue, and the slit is opposite to the second valve tongue.

5. The air intake and exhaust device according to claim 4, characterized in that: The first air intake valve plate further comprises a valve body, and the first valve tongue comprises: A tongue root portion connected to the valve body; The tongue portion is connected to the tongue root portion, and the slit is arranged in the tongue portion.

6. The air intake and exhaust device according to claim 4, characterized in that: At least a portion of the slit is located between an outer side of the second air inlet and an outer edge of the first valve tongue.

7. The air intake and exhaust device according to claim 4, characterized in that: The number of the slits is at least two, and at least two of the slits are respectively located on both sides of the second air inlet.

8. The air intake and exhaust device according to claim 7, characterized in that: At least two of the slits are respectively located on two opposite sides of the second air inlet.

9. The air intake and exhaust device according to claim 1 or 2, characterized in that: The first air suction valve plate further comprises a first opening, and the first valve tongue is arranged at the first opening; the second air suction valve plate further comprises a second opening, and the second valve tongue is arranged at the second opening; Wherein, based on the first valve tongue and the second valve tongue both moving toward the side away from the valve plate, the first air intake port is connected with the second opening through the first opening; based on the second valve tongue moving toward the side away from the valve plate, the first air intake port is connected with the second opening through the second air intake port.

10. The air intake and exhaust device according to claim 1 or 2, characterized in that: Also includes: a first gasket, disposed between the second intake valve plate and the crankcase, the first gasket being provided with a first through hole, the second intake port being opened based on the second valve tongue, the second intake port being communicated with the first through hole; a cylinder head, located on a side of the valve plate facing away from the crankcase; A muffler, disposed on the cylinder head, the muffler comprising a muffler outlet; The second gasket is arranged between the valve plate and the cylinder head. The second gasket is provided with a second through hole. The muffler outlet is communicated with the first air intake port through the second through hole.

11. A compressor, characterized in that: The invention comprises the air intake and exhaust device as claimed in any one of claims 1 to 10.

12. A refrigeration device, characterized in that: include: The air intake and exhaust device according to any one of claims 1 to 10; or The compressor of claim 11.

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