Suction and discharge fat device and waste and old oil collection device

Abstract

The present application relates to a fat suction and drainage device and a waste oil collection device. The fat suction and drainage device comprises a fat suction power channel in communication with a fat suction power port to supply pressure medium to a fat suction power cavity, pressure medium acting on a piston enters the fat suction power cavity through the fat suction power branch channel; pressure medium acting on the oil drainage check valve core to exert force on the oil drainage check valve core to close the oil drainage check valve enters the check valve power cavity through the check valve action branch channel; a resistance structure is arranged in the fat suction power branch channel or the piston cavity, and the resistance structure makes the resistance of the pressure medium flowing to the fat suction power cavity greater than the resistance of the pressure medium flowing to the check valve power cavity. The resistance structure guides the pressure medium to flow to the check valve power cavity first, so that the oil drainage check valve is closed before the plunger pump suctions fat, and the technical problem of low waste oil suction efficiency caused by long delay of the oil drainage port closing and relying only on the action of the spring to close the check valve at the oil drainage port of the current fat suction and drainage device is solved.

Description

Technical Field

[0001] This invention relates to a fat suction device and a waste oil collection device. Background Technology

[0002] To ensure proper lubrication of the friction pair, new lubricating grease needs to be added to the friction pair periodically, while the old lubricating grease needs to be drained. Currently, the old lubricating grease is usually drained using a grease suction device. For example, Chinese patent CN203836552U, with authorization announcement date of September 17, 2014, discloses a dual-path control grease suction device and a waste grease recovery device. The dual-path control grease suction device includes a housing, a piston, and a plunger. The housing has a piston chamber and a plunger chamber that are connected. The diameter of the piston chamber is larger than the diameter of the plunger chamber. The piston and the plunger are connected and slide and seal with the piston chamber and the plunger chamber respectively. The piston chamber has oil ports at both ends, and the side wall of the plunger chamber has a one-way oil inlet and a one-way oil outlet. When the piston moves to the left, it can drive the plunger to open the oil inlet. When the oil ports at both ends of the piston alternately supply oil, it can move back and forth in the piston chamber and drive the plunger to move back and forth. The process of the plunger's reciprocating motion is summarized as the plunger chamber performs grease suction and drainage operations. The dual-channel control grease suction device can remove old grease from the lubrication points of the friction pair, ensuring the smooth injection of new lubricating grease and guaranteeing the lubrication effect of the friction pair lubrication points.

[0003] After the plunger of the aforementioned grease suction device moves to the right to discharge grease, the one-way valve at the discharge port closes only due to the action of the spring. However, the spring at the discharge port is affected by the resistance of the grease and its own fatigue, resulting in a long delay in closing the discharge port. When the plunger then moves to the left to draw grease from the suction port, some of the grease at the discharge port will enter the plunger cavity, causing a small pressure difference between the plunger cavity and the outside environment, resulting in low efficiency in drawing in waste grease from the lubrication point. Summary of the Invention

[0004] The purpose of this invention is to provide a fat suction device to solve the technical problem of low efficiency in removing waste oil caused by the current fat suction device relying solely on the action of a spring to close the one-way valve at the oil outlet, which results in a long delay in closing the oil outlet.

[0005] In addition, the present invention aims to provide a waste grease collection device using the above-mentioned grease suction device, in order to solve the technical problem of low waste grease collection efficiency caused by the low waste grease suction efficiency of the current waste grease collection device.

[0006] The liposuction device of the present invention adopts the following technical solution:

[0007] Liposuction device, including:

[0008] The housing has a plunger chamber and a piston chamber. The plunger chamber wall has a liposuction port and a liposuction discharge port, and the piston chamber wall has a liposuction power port and a liposuction power port.

[0009] The plunger is inserted into the plunger cavity and draws in waste grease through reciprocating motion and discharges the waste grease through the grease discharge port of the plunger cavity.

[0010] The piston is fitted with a movable seal inside the piston chamber, which includes a liposuction power chamber and a liposuction power chamber located on both sides of the piston. The liposuction power port is connected to the liposuction power chamber, and the liposuction power port is connected to the liposuction power chamber.

[0011] The fat suction device includes an oil discharge check valve, which includes a check valve power chamber, a check valve oil discharge chamber, and an oil discharge check valve core. The oil discharge check valve core separates the check valve power chamber from the check valve oil discharge chamber.

[0012] The oil discharge chamber of the one-way valve is connected to the grease discharge port of the plunger chamber. The oil discharge chamber wall of the one-way valve is provided with a grease discharge port that is connected to the grease discharge port of the plunger chamber when the oil discharge one-way valve is opened to discharge waste grease.

[0013] The liposuction device includes a liposuction power channel that communicates with the liposuction power port and supplies pressure transmission medium to the liposuction power chamber. The liposuction power channel is connected to the one-way valve power chamber and is used to inject pressure transmission medium into the one-way valve power chamber when the liposuction power channel injects pressure transmission medium into the liposuction power chamber, thereby driving the oil discharge one-way valve to close.

[0014] The liposuction power channel includes a main channel, liposuction power branch channels connected to the main channel, and one-way valve function branch channels connected to the main channel;

[0015] The pressure-transmitting medium that acts on the piston to move the plunger in the direction of liposuction enters the liposuction power chamber through the liposuction power branch channel; the pressure-transmitting medium that acts on the drain check valve core to apply force to the drain check valve core and close the drain check valve enters the check valve power chamber through the check valve action branch channel.

[0016] The liposuction power channel or piston chamber is provided with a resistance structure, which makes the resistance of the pressure transmission medium flowing to the liposuction power chamber greater than the resistance of the medium flowing to the one-way valve power chamber.

[0017] Beneficial effects: The liposuction device of the present invention sets up a liposuction power channel and sets up a liposuction power branch channel connected to the main channel and a one-way valve action branch channel connected to the main channel. A resistance structure is set in the liposuction power branch channel or the piston chamber. The pressure transmission medium is guided to flow to the one-way valve power chamber first through the resistance structure, so that the oil discharge one-way valve closes before the plunger pump sucks up the liposuction. This prevents the grease in the oil discharge chamber of the one-way valve from flowing back into the plunger chamber. This solves the technical problem of low efficiency of waste grease suction caused by the long closing delay of the oil discharge port due to the one-way valve being closed by the action of the spring at the oil discharge port of the current liposuction device.

[0018] Furthermore, the resistance structure is an elastic element disposed within the liposuction power chamber. This elastic element applies a force to the piston, causing it to compress the liposuction power chamber. The elastic element does not alter the overall structure of the liposuction device, facilitating installation and offering broad applicability.

[0019] Furthermore, the resistance structure is a friction-increasing structure disposed on the piston and / or piston cavity wall to increase the friction between the piston and the piston cavity wall. This method of increasing friction results in a simple structure with good stability.

[0020] Furthermore, the friction-enhancing structure is a friction ring fitted onto the piston. The friction ring is easy to install.

[0021] Furthermore, a portion of the liposuction power channel forms a damping hole, which in turn forms the resistance structure. The damping hole structure is simple and easy to manufacture.

[0022] Furthermore, the resistance structure includes a back pressure valve core and a back pressure spring disposed within the liposuction power support channel. The liposuction power support channel has a valve port that cooperates with the back pressure valve core. Under the action of the back pressure spring, the back pressure valve core closes the valve port. Under the pressure of the pressure-transmitting medium injected into the liposuction power chamber within the liposuction power support channel, the back pressure valve core overcomes the elastic force of the back pressure spring and opens the valve port, thus unblocking the liposuction power support channel. The back pressure valve core provides a better back pressure effect, ensuring the closure of the oil drain check valve.

[0023] Furthermore, the liposuction device includes a return medium branch for the pressure transmission medium in the liposuction power chamber to be discharged from the liposuction power chamber and bypass the resistance structure. The two ends of the return medium branch are respectively connected to the main channel and the liposuction power chamber. A one-way valve is provided on the return medium branch to allow unidirectional passage through the pressure transmission channel. This ensures that the liposuction process is not affected by the resistance structure.

[0024] Furthermore, the drain check valve core is individually controlled by the pressure-transmitting medium injected into the check valve power chamber through the grease suction power channel, and closes under its action. Controlling the drain check valve core solely through the pressure-transmitting medium ensures good stability and fast response.

[0025] Furthermore, the oil drain check valve and the grease suction power channel are both integrated into the housing. The structure is simple and highly integrated.

[0026] Technical solution of the waste oil collection device of the present invention:

[0027] Waste grease collection device, including grease pump, grease suction device and waste grease collection box;

[0028] Liposuction device, including:

[0029] The housing has a plunger chamber and a piston chamber. The plunger chamber wall has a liposuction port and a liposuction discharge port, and the piston chamber wall has a liposuction power port and a liposuction power port.

[0030] The plunger is inserted into the plunger cavity and draws in waste grease through reciprocating motion and discharges the waste grease through the grease discharge port of the plunger cavity.

[0031] The piston is fitted with a movable seal inside the piston chamber, which includes a liposuction power chamber and a liposuction power chamber located on both sides of the piston. The liposuction power port is connected to the liposuction power chamber, and the liposuction power port is connected to the liposuction power chamber.

[0032] The fat suction device includes an oil discharge check valve, which includes a check valve power chamber, a check valve oil discharge chamber, and an oil discharge check valve core. The oil discharge check valve core separates the check valve power chamber from the check valve oil discharge chamber.

[0033] The oil discharge chamber of the one-way valve is connected to the grease discharge port of the plunger chamber. The oil discharge chamber wall of the one-way valve is provided with a grease discharge port that is connected to the grease discharge port of the plunger chamber when the oil discharge one-way valve is opened to discharge waste grease.

[0034] The liposuction device includes a liposuction power channel that communicates with the liposuction power port and supplies pressure transmission medium to the liposuction power chamber. The liposuction power channel is connected to the one-way valve power chamber and is used to inject pressure transmission medium into the one-way valve power chamber when the liposuction power channel injects pressure transmission medium into the liposuction power chamber, thereby driving the oil discharge one-way valve to close.

[0035] The liposuction power channel includes a main channel, liposuction power branch channels connected to the main channel, and one-way valve function branch channels connected to the main channel;

[0036] The pressure-transmitting medium that acts on the piston to move the plunger in the direction of liposuction enters the liposuction power chamber through the liposuction power branch channel; the pressure-transmitting medium that acts on the drain check valve core to apply force to the drain check valve core and close the drain check valve enters the check valve power chamber through the check valve action branch channel.

[0037] The liposuction power channel or piston chamber is provided with a resistance structure, which makes the resistance of the pressure transmission medium flowing to the liposuction power chamber greater than the resistance of the medium flowing to the one-way valve power chamber.

[0038] Beneficial Effects: The liposuction device of this invention, by setting up a liposuction power channel and a liposuction power branch channel connected to the main channel, and a one-way valve action branch channel connected to the main channel, incorporates a resistance structure within the liposuction power branch channel or the piston chamber. This resistance structure guides the pressure-transmitting medium to flow first to the one-way valve power chamber, causing the oil discharge one-way valve to close before the plunger pump draws in liposuction. This prevents grease in the one-way valve's oil discharge chamber from flowing back into the plunger chamber, solving the technical problem of low waste grease collection efficiency caused by the low waste grease extraction efficiency of current waste grease collection devices.

[0039] Furthermore, the resistance structure is an elastic element disposed within the liposuction power chamber. This elastic element applies a force to the piston, causing it to compress the liposuction power chamber. The elastic element does not alter the overall structure of the liposuction device, facilitating installation and offering broad applicability.

[0040] Furthermore, the resistance structure is a friction-increasing structure disposed on the piston and / or piston cavity wall to increase the friction between the piston and the piston cavity wall. This method of increasing friction results in a simple structure with good stability.

[0041] Furthermore, the friction-enhancing structure is a friction ring fitted onto the piston. The friction ring is easy to install.

[0042] Furthermore, a portion of the liposuction power channel forms a damping hole, which in turn forms the resistance structure. The damping hole structure is simple and easy to manufacture.

[0043] Furthermore, the resistance structure includes a back pressure valve core and a back pressure spring disposed within the liposuction power support channel. The liposuction power support channel has a valve port that cooperates with the back pressure valve core. Under the action of the back pressure spring, the back pressure valve core closes the valve port. Under the pressure of the pressure-transmitting medium injected into the liposuction power chamber within the liposuction power support channel, the back pressure valve core overcomes the elastic force of the back pressure spring and opens the valve port, thus unblocking the liposuction power support channel. The back pressure valve core provides a better back pressure effect, ensuring the closure of the oil drain check valve.

[0044] Furthermore, the liposuction device includes a return medium branch for the pressure transmission medium in the liposuction power chamber to be discharged from the liposuction power chamber and bypass the resistance structure. The two ends of the return medium branch are respectively connected to the main channel and the liposuction power chamber. A one-way valve is provided on the return medium branch to allow unidirectional passage through the pressure transmission channel. This ensures that the liposuction process is not affected by the resistance structure.

[0045] Furthermore, the drain check valve core is individually controlled by the pressure-transmitting medium injected into the check valve power chamber through the grease suction power channel, and closes under its action. Controlling the drain check valve core solely through the pressure-transmitting medium ensures good stability and fast response.

[0046] Furthermore, the oil drain check valve and the grease suction power channel are both integrated into the housing. The structure is simple and highly integrated. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of a specific embodiment 1 of the fat suction device of the present invention;

[0048] Figure 2 This is a schematic diagram of the structure of a specific embodiment 1 of the fat suction device of the present invention;

[0049] Figure 3 This is a schematic diagram of a specific embodiment 2 of the fat suction device of the present invention;

[0050] Figure 4 This is a schematic diagram of the structure of a specific embodiment 2 of the fat suction device of the present invention;

[0051] Figure 5 This is a schematic diagram of a specific embodiment 3 of the fat suction device of the present invention;

[0052] Figure 6 This is a schematic diagram of the structure of a specific embodiment 3 of the fat suction device of the present invention;

[0053] Figure 7 This is a schematic diagram of a specific embodiment 4 of the fat suction device of the present invention;

[0054] Figure 8 This is a schematic diagram of the structure of a specific embodiment 4 of the fat suction device of the present invention;

[0055] In the diagram: 1-Shell; 11-Piston chamber; 111-Liposuction power port; 112-Liposuction power port; 113-Liposuction power chamber; 114-Liposuction power chamber; 12-Plunger chamber; 121-Liposuction port; 122-Plunger chamber liposuction port; 13-Liposuction power channel; 131-Main channel; 132-Liposuction power branch channel; 133-One-way valve function branch channel; 14-Liposuction power channel; 15- 151-Check valve chamber; 152-Check valve drain chamber; 16-Drain check valve port; 17-Drain hole; 18-Check valve drain port; 19-Valve port; 20-Return medium branch; 2-Piston; 3-Plunger; 4-Drain check valve core; 5-Back pressure valve core; 6-Back pressure spring; 7-Circuit check valve core; 8-Circuit check valve spring; 9-Damping hole; 10-Piston action spring. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0057] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0058] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0059] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0060] Specific embodiment 1 of the fat suction device of the present invention:

[0061] like Figure 1 and Figure 2 As shown, the liposuction device includes a housing 1, which has a piston chamber 11, a plunger chamber 12, a liposuction power channel 13, and a liposuction power channel 14. The piston chamber 11 has a liposuction power port 111 and a liposuction power port 112 on its wall, and the plunger chamber 12 has a liposuction port 121 and a plunger chamber liposuction port 122 on its wall.

[0062] The piston 2 is slidably sealed in the piston chamber 11, and the plunger 3 is inserted in the plunger chamber 12. The plunger 3 is slidably sealed in the plunger chamber 12. The piston 2 is connected to the plunger 3 to drive the plunger 3 to move back and forth. Through the reciprocating motion of the plunger 3, waste grease is sucked into the plunger chamber 12 and discharged through the grease discharge port 122 of the plunger chamber.

[0063] In this embodiment, the fat suction device is powered by a grease pump, and the pressure transmission medium driving the fat suction device is grease. In other embodiments, the fat suction device can also be driven by a hydraulic pump, in which case hydraulic oil is used as the pressure transmission medium. Of course, other media such as emulsions can also be used as the pressure transmission medium.

[0064] The piston chamber 11 includes a liposuction power chamber 113 and a liposuction power chamber 114 located on both sides of the piston 2. The liposuction power port 111 communicates with the liposuction power chamber 113, and the liposuction power port 112 communicates with the liposuction power chamber 114. The liposuction power channel 13 communicates with the liposuction power port 111 to supply pressure transmission medium to the liposuction power chamber 113. The liposuction power channel 14 communicates with the liposuction power port 112 to supply pressure transmission medium to the liposuction power chamber 114. In other embodiments, hydraulic oil or emulsion may also be injected into the liposuction power chamber as needed.

[0065] The housing 1 is also equipped with a drain check valve, which includes a check valve chamber 15 and a drain check valve core 4 disposed within the check valve chamber 15. In this embodiment, the check valve chamber 15 is divided into a check valve power chamber 151 and a check valve drain chamber 152 by the drain check valve core 4. The drain check valve core 4 is slidably and sealingly assembled within the check valve chamber 15. A drain check valve port 16 is provided on the wall of the check valve power chamber 151. The check valve power chamber 151 communicates with the plunger chamber grease discharge port 122 through the drain check valve port 16. After the pressure in the plunger chamber 12 increases, the drain check valve core 4 opens the drain check valve port 16 under the action of the grease pressure in the plunger chamber 12. The grease in the plunger chamber 12 can enter the check valve drain chamber 152 through the plunger chamber grease discharge port 122 and the drain check valve port 16. A grease discharge hole 17 is provided on the cavity wall of the one-way valve power chamber 151, through which waste grease entering the one-way valve power chamber 151 is discharged. The grease discharge hole 17 is set in the orifice on the cavity wall of the one-way valve power chamber 151 to form a one-way valve grease discharge port 18.

[0066] The one-way valve power chamber 151 is connected to the liposuction power channel 13. The one-way valve oil discharge chamber 152 is used to communicate with the plunger chamber oil discharge port 122 and the one-way valve oil discharge port 18. The oil discharge one-way valve port 16 is set on the cavity wall of the one-way valve oil discharge chamber 152, so that the oil discharge one-way valve core 4 separates the liposuction power channel 13 from the one-way valve oil discharge port 18, and separates the liposuction power channel 14 from the plunger chamber oil discharge port 122.

[0067] When the drain check valve is open, the grease discharge port 122 of the plunger chamber is connected to the grease discharge port 18 of the check valve. When the drain check valve is closed, the passage between the grease discharge port 122 of the plunger chamber and the grease discharge port 18 of the check valve is blocked.

[0068] To enable the oil discharge check valve to respond quickly, in this embodiment, the liposuction power channel 13 includes a main channel 131, a liposuction power branch channel 132 connected to the main channel 131, and a check valve action branch channel 133 connected to the main channel 131. The pressure transmission medium acting on the piston 2 to move the plunger 3 in the liposuction direction enters the liposuction power chamber 113 through the liposuction power branch channel 132. The pressure transmission medium acting on the oil discharge check valve core 4 to apply force to the oil discharge check valve core 4 and close the oil discharge check valve enters the check valve power chamber 151 through the check valve action branch channel 133.

[0069] The liposuction power channel 132 is equipped with a back pressure valve core 5, a back pressure spring 6, and a valve port 19 that cooperates with the back pressure valve core 5. Under the action of the back pressure spring 6, the back pressure valve core 5 closes the valve port 19. Under the pressure of the pressure-transmitting medium injected into the liposuction power chamber in the liposuction power channel 132, the back pressure valve core 5 overcomes the elastic force of the back pressure spring 6 and opens the valve port 19, thus opening the liposuction power channel 132. Under the action of the back pressure spring 6 and the back pressure valve core 5, the resistance of the pressure-transmitting medium flowing from the liposuction power channel 13 to the liposuction power chamber 113 is greater than the resistance flowing to the one-way valve power chamber 151. The pressure-transmitting medium first enters the one-way valve power chamber 151, causing the oil discharge one-way valve core 4 to close. Then, the pressure-transmitting medium enters the liposuction power chamber 113, causing the piston 2 to drive the plunger 3 to move. The pressure difference between the plunger chamber 12 and the outside increases, and the grease at the lubrication point enters the plunger chamber 12 through the liposuction port 121. The back pressure valve core 5, the back pressure spring 6, and the valve port 19 that cooperates with the back pressure valve core 5 form a back pressure valve. The back pressure valve is a resistance structure that makes the resistance of the pressure transmission medium flowing to the liposuction power chamber 113 greater than the resistance of the medium flowing to the one-way valve power chamber 151.

[0070] Because a resistance structure is provided in the liposuction power channel 132, in order to quickly discharge the pressure medium in the liposuction power chamber 113 when the plunger chamber 12 discharges grease, a return medium branch 20 is provided on the housing 1 in this embodiment. The two ends of the return medium branch 20 are connected to the main channel 131 and the liposuction power chamber 113 respectively. The return medium branch 20 allows the pressure medium in the liposuction power chamber 113 to be discharged from the liposuction power chamber 113, bypassing the back pressure valve core 5 and the back pressure spring 6. In order to restrict the pressure medium from directly entering the liposuction power chamber 113 through the return medium branch 20 when the plunger chamber 12 is liposuctioning, a one-way valve is provided on the return medium branch 20 to allow the pressure medium to pass through in one direction. The one-way valve includes a one-way valve core 7 and a one-way valve spring 8. The one-way valve spring 8 is used to keep the one-way valve core 7 in the closed position of the return medium branch 20.

[0071] The working process of the fat suction device of the present invention is as follows:

[0072] When the plunger chamber 12 is suctioning grease, the pressure-transmitting medium, i.e., grease, is injected into the suction power channel 13 by the grease pump. The pressure-transmitting medium first enters the one-way valve power chamber 151 through the one-way valve action branch channel 133, causing the oil discharge one-way valve core 4 to close the oil discharge one-way valve port 16. Then, under the pressure of the pressure-transmitting medium in the suction power channel 13, the back pressure spring 6 is compressed, the back pressure valve core 5 opens the valve port 19, and the pressure-transmitting medium enters the suction power chamber 113 through the suction power branch channel 132. The pressure in the suction power chamber 113 increases, the piston 2 pulls the plunger 3 to move, and the pressure difference between the plunger chamber 12 and the outside increases, and the grease at the lubrication point is sucked into the plunger chamber 12.

[0073] After the grease is suctioned from the plunger chamber 12, the grease pump injects a pressure-transmitting medium, i.e., grease, into the grease discharge power chamber 114. This increases the pressure within the grease discharge power chamber 114, causing the piston 2 to push the plunger 3 to move. This allows the grease in the plunger chamber 12 to be discharged through the plunger chamber discharge port 122. The oil discharge check valve core 4 is then opened, and the waste grease enters the check valve discharge chamber 152, and is then discharged through the discharge hole 17, which is connected to the check valve discharge chamber 152, into the waste oil collection container. This completes one cycle of grease suction and discharge.

[0074] Specific embodiment 2 of the liposuction device of the present invention differs from the liposuction device in specific embodiment 1 above only in that: Figure 3 and Figure 4 As shown, a portion of the liposuction power channel 132 forms a damping hole 9, which forms the resistance structure.

[0075] Specific embodiment 3 of the liposuction device of the present invention differs from the liposuction device in specific embodiment 2 above only in that: Figure 5 and Figure 6 As shown, in this embodiment, no return medium branch is provided. When the plunger cavity 12 is draining oil, the pressure transmission medium in the grease suction power cavity 113 flows back through the damping hole 9.

[0076] Specific embodiment 4 of the liposuction device of the present invention differs from the liposuction device in specific embodiment 1 above only in that: Figure 7 and Figure 8 As shown, in this embodiment, the resistance structure is a piston-acting spring 10 disposed within the liposuction power chamber 114. The piston-acting spring 10 applies a force to the piston 2, causing the piston 2 to squeeze the liposuction power chamber 113. In this embodiment, there is no need to set up a return medium branch, simplifying the structure of the liposuction device.

[0077] In a specific embodiment 5 of the liposuction device of the present invention, the liposuction device differs from that in specific embodiment 1 only in that the resistance structure is a friction-enhancing structure provided on the piston to increase the friction between the piston and the piston cavity wall. In this embodiment, the friction-enhancing structure is a rubber friction ring fitted on the piston, and the friction ring is a rubber sealing ring. In other embodiments, the friction ring can also be a guide ring that serves a guiding function, and the guide ring is made of plastic. In other embodiments, the friction-enhancing structure can also be a coating provided on the piston cavity wall. Of course, friction-enhancing structures can also be provided on both the piston and the piston cavity wall.

[0078] The 6th embodiment of the fat suction device of the present invention differs from the 1st embodiment of the fat suction device in this embodiment only in that: in this embodiment, a one-way valve power chamber spring is also provided in the one-way valve power chamber. The oil discharge one-way valve core is controlled by the oil injected into the one-way valve power chamber in the fat suction power channel and the one-way valve power chamber spring, and is closed under the combined action of the two.

[0079] The specific embodiment 7 of the fat suction device of the present invention differs from the specific embodiment 1 of the fat suction device described above only in that the oil draining one-way valve and the housing are set separately.

[0080] The 8th embodiment of the liposuction device of the present invention differs from the 1st embodiment of the liposuction device described above only in that: the shell is connected to a liposuction power tube, and the channel inside the liposuction power tube forms a liposuction power channel.

[0081] The specific embodiment 9 of the fat suction device of the present invention differs from the specific embodiment 1 of the fat suction device in this embodiment only in that: in this embodiment, the piston and plunger are detachably connected separately, and the housing includes two parts, one part forming a piston cylinder and the other part forming a plunger cylinder.

[0082] A specific embodiment of the waste grease collection device of the present invention includes a grease pump, a grease suction device, and a waste grease collection box. The grease suction device has the same structure as described in any specific embodiment of the grease suction device described above, and will not be repeated here.

[0083] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. An oil suction and discharge device, comprising: a housing having a plunger cavity and a piston cavity, the plunger cavity having an oil suction port and an oil discharge port on the cavity wall, the piston cavity having an oil suction power port and an oil discharge power port on the cavity wall, a plunger movably installed in the plunger cavity, sucking waste oil into the plunger cavity through reciprocating movement and discharging the sucked waste oil through the oil discharge port of the plunger cavity, a piston movably and sealingly installed in the piston cavity, the piston cavity including an oil suction power cavity and an oil discharge power cavity on both sides of the piston, the oil suction power port being communicated with the oil suction power cavity, and the oil discharge power port being communicated with the oil discharge power cavity, characterized in that the oil suction and discharge device comprises an oil discharge check valve, the oil discharge check valve including a check valve power cavity, a check valve oil discharge cavity and a check valve core, the check valve core separating the check valve power cavity from the check valve oil discharge cavity, the check valve oil discharge cavity being communicated with the oil discharge port of the plunger cavity, and the check valve oil discharge cavity wall being provided with a check valve oil discharge port for discharging waste oil from the oil discharge port of the plunger cavity when the oil discharge check valve is opened, the oil suction and discharge device comprising an oil suction power channel communicated with the oil suction power port for supplying pressure medium to the oil suction power cavity, the oil suction power channel being communicated with the check valve power cavity for injecting pressure medium into the check valve power cavity when the oil suction power channel injects pressure medium into the oil suction power cavity, thereby driving the oil discharge check valve to close, the oil suction power channel including a main channel, an oil suction power branch channel communicated with the main channel, and a check valve action branch channel communicated with the main channel, pressure medium acting on the piston to move the plunger in the oil suction direction entering the oil suction power cavity through the oil suction power branch channel, and pressure medium acting on the check valve core to exert a force on the check valve core to close the oil discharge check valve entering the check valve power cavity through the check valve action branch channel, the oil suction power branch channel or the piston cavity being provided with a resistance structure, the resistance structure making the resistance of pressure medium flowing to the oil suction power cavity greater than the resistance of pressure medium flowing to the check valve power cavity, the resistance structure including a friction increasing structure provided on the piston and / or the piston cavity wall for increasing the friction between the piston and the piston cavity wall, and a back pressure valve core and a back pressure spring provided in the oil suction power branch channel, the oil suction power branch channel being provided with a valve port matched with the back pressure valve core, the back pressure valve core closing the valve port under the action of the back pressure spring, and the back pressure valve core opening the valve port against the elastic force of the back pressure spring under the pressure of pressure medium injected into the oil suction power cavity in the oil suction power branch channel, thereby making the oil suction power branch channel through.

2. The liposuction device of claim 1, wherein, the resistance structure being an elastic member provided in the oil discharge power cavity, the elastic member being used to exert a force on the piston to make the piston press the oil suction power cavity.

3. The liposuction device of claim 1, wherein, the friction increasing structure being a friction ring sleeved on the piston.

4. The liposuction device of claim 1, wherein, part of the oil suction power branch channel forms a damping hole, and the damping hole forms the resistance structure.

5. The liposuction device of claim 4, wherein, the oil suction and discharge device comprising a medium return branch for pressure medium in the oil suction power cavity to bypass the resistance structure when the pressure medium is discharged from the oil suction power cavity, the two ends of the medium return branch being communicated with the main channel and the oil suction power cavity respectively, and the medium return branch being provided with a return loop check valve for allowing pressure medium to pass through in one direction.

6. The liposuction device according to any one of claims 1-4, wherein, the check valve core being controlled by pressure medium injected into the check valve power cavity from the oil suction power channel, and being closed under the action of the pressure medium.

7. The liposuction device according to any one of claims 1-4, wherein, The oil discharging one-way valve and the fat suction power channel are integrated on the shell.

8. A waste oil collecting apparatus comprising a suction oil drain and a waste oil collecting tank, characterized by comprising: The fat suction and discharge device is the fat suction and discharge device according to any one of claims 1-7.

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