A storage device for crude grease from kitchen waste with impurity removal function

Abstract

This invention relates to the technical field of food waste grease storage equipment, and discloses a food waste coarse grease storage device with impurity removal function. The device includes an oil storage tank, a settling pipe at the bottom of the tank, and an air pump installed on the outer wall of the tank. An air nozzle is located inside the tank and connected to the air pump's outlet. When air is released from the nozzle, the oil inside the tank flows in a spiral motion. A filter screen is installed at the top of the settling pipe, tilted and positioned above the settling pipe opening. Impurities in the oil are thrown towards the inner edge of the tank under centrifugal force and then settle into the settling pipe. The oil can flow back into the tank through the filter screen, while impurities are intercepted by the screen and slide into the settling pipe along the tilted screen. This eliminates the need for manual cleaning inside the tank, reducing labor intensity.

Description

Technical Field

[0001] This invention relates to the technical field of food waste grease storage equipment, specifically, to a food waste crude grease storage device with impurity removal function. Background Technology

[0002] The crude oil obtained after sorting and oil extraction from kitchen waste contains solid impurities such as food residue, mud, and debris. These impurities are denser than the oil and will gradually settle to the bottom of the storage tank during static storage. Existing conventional oil storage tanks only have the function of storing oil. The impurities accumulated at the bottom of the tank need to be manually cleaned by staff periodically opening the lid and entering the tank. The working environment is poor, the labor intensity is high, and manual cleaning is prone to secondary contamination of the oil. At the same time, the accumulation of impurities at the bottom will occupy the oil storage space, accelerate the deterioration of the oil, and affect the quality of the stored crude oil.

[0003] Currently, oil storage equipment on the market lacks online impurity removal and dynamic sedimentation separation structures, making it impossible to achieve automatic collection and easy cleaning of impurities, thus limiting its use. Therefore, we propose a storage device for crude grease from kitchen waste with impurity removal function. Summary of the Invention

[0004] This invention provides a storage device for crude grease from kitchen waste with impurity removal function. This storage device can solve the problems mentioned in the background art that the oil storage equipment on the market currently lacks an online impurity removal and dynamic sedimentation separation structure, cannot achieve automatic collection and simple cleaning of impurities, and has obvious limitations in use.

[0005] To achieve the above objectives, this solution provides a storage device for coarse grease from kitchen waste with impurity removal function, including an oil storage tank. A settling pipe is provided at the bottom of the oil storage tank, and the top opening of the settling pipe is flush with the bottom of the oil storage tank. An air pump is installed on the outer wall of the oil storage tank, and a nozzle is provided inside the oil storage tank. The nozzle is connected to the air outlet of the air pump. When air is released from the nozzle, the oil inside the oil storage tank flows in a spiral motion. A filter screen is provided at the top of the settling pipe, the filter screen is inclined and located above the opening of the settling pipe.

[0006] Optionally, a guide plate is installed at the bottom of the filter screen. The guide plate is made of flexible rubber, and the bottom end of the guide plate is located inside the settling pipe.

[0007] Optionally, the settling pipe is configured as a spiral pipe, and the spiral direction of the settling pipe is the same as the rotation direction of the oil body. The settling pipe includes four stainless steel plates, and the four stainless steel plates are welded and fixed in sequence.

[0008] Optionally, the bottom end of the settling pipe is provided with a slag discharge port, and a bottom cover is detachably installed at the bottom of the slag discharge port. A rubber ring for sealing is provided between the bottom cover and the slag discharge port.

[0009] Optionally, a fixing pin is provided inside the oil storage tank, a positioning plate is installed on the fixing pin, a channel is opened inside the positioning plate, the nozzle is connected to the channel, and the channel is connected to the air outlet of the air pump. The positioning plate is set in the same direction as the diameter of the bottom surface of the oil storage tank. Multiple nozzles are provided, and the multiple nozzles are arranged at equal intervals on the positioning plate.

[0010] Optionally, the nozzle includes a fixed nozzle and a movable nozzle, with the fixed nozzle disposed around the bottom surface of the oil storage tank and the movable nozzle disposed close to the center of the oil storage tank.

[0011] Optionally, a hinge shaft is rotatably installed inside the positioning plate, the movable nozzle is connected to the hinge shaft, and a flexible hose is connected between the movable nozzle and the channel. When the movable nozzle emits air, it swings irregularly.

[0012] Optionally, the filter screen is hinged to the top of the settling pipe, and a crossbar is installed on the top of the settling pipe. When the filter screen rotates downward, the filter screen strikes the crossbar. The oil storage tank is equipped with an airbag mechanism. The top of the airbag mechanism is connected to the tail of the filter screen. After the airbag mechanism expands, the filter screen rotates.

[0013] Optionally, the air pump is equipped with a solenoid valve at its outlet, and the solenoid valve is configured as a two-position four-way solenoid valve. The air inlet of the solenoid valve is connected to the air outlet of the air pump. The two air outlets of the solenoid valve are respectively connected to pipe No. 1 and pipe No. 2. Pipe No. 1 is connected to the airbag mechanism, and pipe No. 2 is connected to the channel.

[0014] Optionally, the airbag mechanism includes a fixed plate and a movable plate. The fixed plate is fixed to the bottom of the oil storage tank, and the movable plate is installed at the tail of the filter screen. An airbag body is sealed between the fixed plate and the movable plate. The airbag body has a central rod inside, which is slidably inserted into the movable plate. A tension spring is sleeved on the central rod, and the other end of the tension spring is connected to the movable plate. When the pressure inside the airbag body decreases, the tension spring drives the movable plate to return to its original position.

[0015] Through the above technical solution, the kitchen waste coarse oil storage device with impurity removal function provided by this solution is used as follows: 1. Impurities in the oil are thrown towards the inner edge of the oil storage tank under the action of centrifugal force. As the oil continues to flow, the impurities gradually move to the bottom edge of the oil storage tank and then settle into the settling pipe. Through the inclined filter screen, the oil can flow back into the oil storage tank, while the impurities are intercepted by the filter screen and slide into the settling pipe along the inclined filter screen, thus completing the collection of impurities. There is no need for manual entry into the oil storage tank for cleaning, which reduces labor intensity. 2. The expansion of the airbag mechanism pushes the tail of the filter screen upward, causing the filter screen to rotate downward around the hinge point. The filter screen will hit the crossbar and generate vibration, thereby shaking off the impurities clogging the surface of the filter screen, realizing automatic cleaning of the filter screen without the need for manual cleaning, and ensuring the continuous working capability of the device.

[0016] Other features and advantages of this solution will be described in detail in the following detailed implementation section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of the oil storage tank of the present invention.

[0019] Figure 3 Appendix to this invention Figure 2 A magnified structural diagram of point A in the middle.

[0020] Figure 4 This is a schematic diagram of the installation structure of pipe No. 1 and pipe No. 2 of the present invention.

[0021] Figure 5 This is a schematic diagram of the installation structure of the filter screen and crossbar of the present invention.

[0022] Figure 6 This is a schematic diagram of the airbag mechanism of the present invention.

[0023] Figure 7 This is a schematic diagram of the slag discharge port and bottom cover of the present invention.

[0024] Figure 8 This is a cross-sectional structural diagram of the fixing plate of the present invention.

[0025] Figure 9 Appendix to this invention Figure 8 A magnified structural diagram at point B in the middle.

[0026] Explanation of reference numerals in the attached drawings: 101, oil storage tank; 102, settling pipe; 103, air pump; 104, nozzle; 1041, fixed nozzle; 1042, movable nozzle; 105, filter screen; 106, guide plate; 201, slag discharge port; 202, bottom cover; 203, fixing pin; 204, positioning plate; 205, channel; 206, hinge shaft; 207, hose; 301, crossbar; 302, airbag mechanism; 3021, fixed plate; 3022, movable plate; 3023, airbag body; 3024, center rod; 3025, tension spring; 303, solenoid valve; 304, pipe No. 1; 305, pipe No. 2. Detailed Implementation

[0027] To make the aforementioned objectives, features, and advantages of this solution more apparent and understandable, the specific embodiments of this solution are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this solution. However, this solution can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this solution. Therefore, this solution is not limited to the specific embodiments disclosed below.

[0028] In the description of this solution, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this solution. The terms "first" and "second" are used to distinguish one element from another and do not have sequential or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings indicate the same or similar elements, which will not be repeated here.

[0029] In this solution, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this solution based on the specific circumstances.

[0030] According to some embodiments of this solution, a storage device for crude grease from kitchen waste with a purification function is provided, see reference. Figures 1 to 9 As shown, the food waste crude oil storage device with impurity removal function includes an oil storage tank 101, a settling pipe 102 at the bottom of the oil storage tank 101, the top opening of the settling pipe 102 being flush with the bottom of the oil storage tank 101, an air pump 103 installed on the outer wall of the oil storage tank 101, a nozzle 104 inside the oil storage tank 101, and the nozzle 104 being connected to the air outlet of the air pump 103. When the nozzle 104 releases air, the oil inside the oil storage tank 101 flows in a spiral. A filter screen 105 is installed at the top of the settling pipe 102, the filter screen 105 being inclined and located above the opening of the settling pipe 102.

[0031] Thus, when it is necessary to remove impurities from the crude grease in the oil storage tank 101, the air pump 103 is started. The air pump 103 sprays gas into the oil in the oil storage tank 101 through the nozzle 104. The thrust of the gas when it is sprayed out drives the oil to flow in a spiral. During the spiral flow, the impurities in the oil are thrown towards the inner edge of the oil storage tank 101 under the action of centrifugal force. As the oil continues to flow, the impurities gradually move to the bottom edge of the oil storage tank 101 and then settle into the settling pipe 102. Through the inclined filter screen 105, the oil can flow back into the oil storage tank 101, while the impurities are intercepted by the filter screen 105 and slide into the settling pipe 102 along the inclined filter screen 105, thus completing the collection of impurities. There is no need for manual entry into the oil storage tank 101 for cleaning, which reduces labor intensity.

[0032] For details, please refer to Figure 5 A guide plate 106 is installed at the bottom of the filter screen 105. The guide plate 106 is made of flexible rubber (food-grade nitrile rubber), and the bottom end of the guide plate 106 is located inside the settling tube 102. Through the flexible guide plate 106, impurities sliding down the filter screen 105 can be smoothly guided into the settling tube 102. At the same time, the flexible rubber can prevent impurities from getting stuck in the gap between the filter screen 105 and the settling tube 102, ensuring that impurities can smoothly enter the settling tube 102.

[0033] Furthermore, the settling tube 102 is configured as a spiral tube, and the spiral direction of the settling tube 102 is the same as the rotation direction of the oil. The settling tube 102 includes four stainless steel plates, which are welded and fixed in sequence. The spiral settling tube 102 can extend the falling path of impurities in the settling tube 102, allowing the impurities sufficient time to settle. At the same time, the spiral structure can buffer the oil, preventing the flow of the oil from re-rolling up the impurities in the settling tube 102, thus ensuring the settling effect. The structure made of welded stainless steel plates is easy to process and has good corrosion resistance, making it suitable for the storage environment of crude oil.

[0034] Please refer to Figure 7 The bottom end of the settling pipe 102 is provided with a slag discharge port 201. A bottom cover 202 is detachably installed at the bottom of the slag discharge port 201. A rubber ring for sealing is provided between the bottom cover 202 and the slag discharge port 201. When the impurities in the settling pipe 102 accumulate to a certain amount, the operator can directly remove the bottom cover 202 and open the slag discharge port 201 to discharge the impurities in the settling pipe 102 without opening the oil storage tank 101. The operation is very convenient. The rubber ring can ensure the sealing performance of the slag discharge port 201 and prevent oil leakage.

[0035] Please refer to Figure 2 and Figure 3 The oil storage tank 101 is equipped with a fixing pin 203, and a positioning plate 204 is installed on the fixing pin 203. The positioning plate 204 has a channel 205 inside, and the nozzle 104 is connected to the channel 205. The channel 205 is also connected to the air outlet of the air pump 103. The positioning plate 204 is set in the same direction as the bottom diameter of the oil storage tank 101. Multiple nozzles 104 are provided and are equidistantly arranged on the positioning plate 204. The gas output by the air pump 103 first enters the channel 205 and then is ejected through each nozzle 104. The multiple equidistant nozzles 104 can ensure the uniformity of gas ejection, thereby driving the oil to form a stable spiral flow and ensuring the effect of centrifugal impurity removal.

[0036] Furthermore, the nozzle 104 includes a fixed nozzle 1041 and a movable nozzle 1042. The fixed nozzle 1041 is located on the outer periphery of the bottom surface of the oil storage tank 101, and the movable nozzle 1042 is located near the center of the oil storage tank 101. The fixed nozzle 1041 on the periphery can drive the oil body on the periphery to rotate stably, while the movable nozzle 1042 near the center can disturb the oil body in the central area, so as to prevent the oil body in the central area from flowing too slowly, which would prevent impurities from being effectively thrown out, thus improving the uniformity of impurity removal.

[0037] Please refer to Figure 5 A hinge shaft 206 is rotatably installed inside the positioning plate 204. The movable nozzle 1042 is connected to the hinge shaft 206, and a hose 207 is connected between the movable nozzle 1042 and the channel 205. When the movable nozzle 1042 emits air, it swings irregularly. When the gas is ejected from the movable nozzle 1042, the reaction force of the gas will drive the movable nozzle 1042 to swing irregularly around the hinge shaft 206. This allows the gas ejected from the movable nozzle 1042 to disturb the oil in the central area in all directions, avoiding dead flow corners in the central area and ensuring that all impurities can be thrown to the edge by centrifugal force, thus improving the thoroughness of impurity removal.

[0038] In some implementations of this solution, reference is made to Figure 2 , Figure 3As shown, the filter screen 105 is hinged to the top of the settling pipe 102. A crossbar 301 is installed on the top of the settling pipe 102. After the filter screen 105 rotates downward, it strikes the crossbar 301. An airbag mechanism 302 is provided inside the oil storage tank 101. The top of the airbag mechanism 302 is connected to the tail of the filter screen 105. After the airbag mechanism 302 expands, the filter screen 105 rotates.

[0039] Please refer to Figure 6 The airbag mechanism 302 includes a fixed plate 3021 and a movable plate 3022. The fixed plate 3021 is fixed to the bottom of the oil storage tank 101, and the movable plate 3022 is installed at the tail of the filter screen 105. An airbag body 3023 is sealed between the fixed plate 3021 and the movable plate 3022. A central rod 3024 is provided inside the airbag body 3023. The central rod 3024 is slidably inserted into the movable plate 3022. A tension spring 3025 is sleeved on the central rod 3024. The other end of the tension spring 3025 is connected to the movable plate 3022. After the pressure inside the airbag body 3023 decreases, the tension spring 3025 drives the movable plate 3022 to reset.

[0040] Specifically, when gas enters the airbag body 3023, the airbag body 3023 expands, pushing the movable plate 3022 to move away from the fixed plate 3021, thereby causing the filter screen 105 to rotate. When the gas in the airbag body 3023 is discharged, the internal pressure decreases, and the tension spring 3025 pulls the movable plate 3022 to reset, thereby causing the filter screen 105 to quickly reset. The center rod 3024 can ensure the stability of the movement of the movable plate 3022 and prevent deviation.

[0041] Thus, after the filter screen 105 has been used for a period of time, its surface is easily clogged by impurities. At this time, the expansion of the air bladder mechanism 302 can push the tail of the filter screen 105 upward, thereby causing the filter screen 105 to rotate downward around the hinge point. The filter screen 105 will hit the crossbar 301 and generate vibration, thereby shaking off the impurities clogging the surface of the filter screen 105, realizing automatic unclogging of the filter screen 105 without the need for manual cleaning of the filter screen, ensuring the continuous working capability of the device. When the air bladder mechanism 302 vents, the tension spring 3025 will drive the movable plate 3022 to reset, thereby driving the filter screen 105 to quickly reset.

[0042] Please refer to Figure 1 The air pump 103 is equipped with a solenoid valve 303 at its outlet. The solenoid valve 303 is a two-position four-way solenoid valve. The air inlet of the solenoid valve 303 is connected to the air outlet of the air pump 103. The two outlets of the solenoid valve 303 are respectively connected to pipe 1 304 and pipe 2 305. Pipe 1 304 is connected to the airbag mechanism 302, and pipe 2 305 is connected to the channel 205.

[0043] The solenoid valve 303 can switch the flow direction of the gas output from the air pump 103. When impurity removal is required, the solenoid valve 303 guides the gas from the air pump 103 to the second pipe 305 and into the channel 205. The gas is then sprayed out through the nozzle 104, causing the oil to flow. When the filter screen 105 needs to be cleaned, the solenoid valve 303 switches the flow direction, guiding the gas from the air pump 103 to the first pipe 304 and into the airbag mechanism 302, causing the airbag mechanism 302 to expand, thereby clearing the filter screen.

[0044] In practice, a one-way valve is installed on pipe 305 to prevent oil backflow. After the airbag mechanism 302 is restored, the gas inside the airbag mechanism 302 flows out through pipe 304 and the exhaust port of solenoid valve 303.

[0045] Through the above technical solution, the kitchen waste crude oil storage device with impurity removal function provided by this solution, when in use, the air pump 103 sprays gas into the oil body in the oil storage tank 101 through the nozzle 104. The thrust of the gas when it is sprayed out drives the oil body to spiral flow. During the spiral flow, the impurities in the oil body are thrown to the inner edge of the oil storage tank 101 under the action of centrifugal force. As the oil body continues to flow, the impurities gradually move to the bottom edge of the oil storage tank 101 and then settle into the settling pipe 102. Through the inclined filter screen 105, the oil body can flow back into the oil storage tank 101 through the filter screen 105, while the impurities are intercepted by the filter screen 105 and slide into the settling pipe 102 along the inclined filter screen 105, thus completing the collection of impurities. There is no need for manual entry into the oil storage tank 101 for cleaning, which reduces labor intensity and solves the problem mentioned in the background technology: the current oil storage equipment on the market lacks the structure of online impurity removal and dynamic settling separation, and cannot realize automatic collection and simple cleaning of impurities, which has obvious limitations in use.

[0046] Furthermore, when impurities clog the surface of the filter screen 105, the output path of the air pump 103 is switched by the two-position four-way solenoid valve 303. High-pressure gas enters the airbag mechanism 302, causing the airbag body to expand. This pushes the movable plate 3022 upward, causing the filter screen 105 to rotate downward around the hinge point and strike the crossbar 301, generating vibration. This shakes the clogged impurities attached to the surface of the filter screen 105 into the settling pipe 102. After the blockage is cleared, the solenoid valve 303 switches to exhaust, and the tension spring 3025 pulls the movable plate 3022 to reset, causing the filter screen 105 to return to its initial working position. This achieves automatic blockage clearing of the filter screen 105 without manual intervention, ensuring the long-term stable operation of the device.

[0047] In addition, the spiral direction of the spiral settling pipe 102 is consistent with the rotation direction of the oil body, which extends the settling path of impurities and buffers the impact force of oil flow, preventing the settling impurities from being rolled up again and carried into the oil storage tank 101, thus improving the impurity removal efficiency. The bottom of the settling pipe 102 is equipped with a detachable sealing bottom cover 202. Only the bottom cover 202 needs to be removed to quickly discharge the settling impurities. The operation is simple and does not require opening the top cover of the oil storage tank 101.

[0048] The preferred embodiments of this solution have been described in detail above with reference to the accompanying drawings. However, this solution is not limited to the specific details in the above embodiments. Within the scope of the technical concept of this solution, various simple modifications can be made to the technical solution, and these simple modifications all fall within the protection scope of this solution.

[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this solution will not describe the various possible combinations separately.

[0050] Furthermore, various implementations of this solution can be combined in any way, as long as they do not violate the spirit of this solution, they should also be regarded as the content disclosed in this solution.

Claims

1. A storage device for crude grease from kitchen waste with impurity removal function, comprising an oil storage tank (101), characterized in that: The bottom of the oil storage tank (101) is provided with a settling pipe (102), the top opening of the settling pipe (102) is flush with the bottom of the oil storage tank (101), an air pump (103) is installed on the outer wall of the oil storage tank (101), and a nozzle (104) is provided inside the oil storage tank (101), and the nozzle (104) is connected to the air outlet of the air pump (103). When the nozzle (104) releases air, the oil inside the oil storage tank (101) flows in a spiral. A filter screen (105) is provided at the top of the settling pipe (102). The filter screen (105) is inclined and located above the opening of the settling pipe (102).

2. The storage device for crude grease from kitchen waste with impurity removal function according to claim 1, characterized in that: A guide plate (106) is installed at the bottom of the filter screen (105). The guide plate (106) is made of flexible rubber skin, and the bottom end of the guide plate (106) is located inside the settling pipe (102).

3. The storage device for crude grease from kitchen waste with impurity removal function according to claim 1, characterized in that: The settling pipe (102) is configured as a spiral pipe, and the spiral direction of the settling pipe (102) is the same as the rotation direction of the oil body. The settling pipe (102) includes four stainless steel plates, and the four stainless steel plates are welded and fixed in sequence.

4. A storage device for crude grease from kitchen waste with impurity removal function according to claim 1, characterized in that: The settling pipe (102) has a slag discharge port (201) at the bottom end. A bottom cover (202) is detachably installed at the bottom of the slag discharge port (201). A rubber ring for sealing is provided between the bottom cover (202) and the slag discharge port (201).

5. A storage device for crude grease from kitchen waste with impurity removal function according to claim 1, characterized in that: The oil storage tank (101) is provided with a fixing pin (203) inside, and a positioning plate (204) is installed on the fixing pin (203). The positioning plate (204) has a channel (205) inside, the nozzle (104) is connected to the channel (205), and the channel (205) is connected to the air outlet of the air pump (103). The positioning plate (204) is set in the same direction as the bottom diameter of the oil storage tank (101). Multiple nozzles (104) are provided, and the multiple nozzles (104) are arranged at equal intervals on the positioning plate (204).

6. A storage device for crude grease from kitchen waste with impurity removal function according to claim 5, characterized in that: The nozzle (104) includes a fixed nozzle (1041) and a movable nozzle (1042). The fixed nozzle (1041) is located on the outer periphery of the bottom surface of the oil storage tank (101), and the movable nozzle (1042) is located near the center of the oil storage tank (101).

7. A storage device for crude grease from kitchen waste with impurity removal function according to claim 6, characterized in that: A hinge shaft (206) is rotatably installed inside the positioning plate (204). The movable nozzle (1042) is connected to the hinge shaft (206), and a hose (207) is connected between the movable nozzle (1042) and the channel (205). When the movable nozzle (1042) releases air, it swings irregularly.

8. A storage device for crude grease from kitchen waste with impurity removal function according to claim 7, characterized in that: The filter screen (105) is hinged to the top of the settling pipe (102), and a crossbar (301) is installed on the top of the settling pipe (102). After the filter screen (105) rotates downward, the filter screen (105) strikes the crossbar (301). The oil storage tank (101) is equipped with an airbag mechanism (302). The top of the airbag mechanism (302) is connected to the tail of the filter screen (105). After the airbag mechanism (302) expands, the filter screen (105) rotates.

9. A storage device for crude grease from kitchen waste with impurity removal function according to claim 8, characterized in that: The air pump (103) is equipped with a solenoid valve (303) at its outlet end, and the solenoid valve (303) is configured as a two-position four-way solenoid valve. The air inlet of the solenoid valve (303) is connected to the air outlet of the air pump (103). The two air outlets of the solenoid valve (303) are respectively connected to pipe No. 1 (304) and pipe No. 2 (305). Pipe No. 1 (304) is connected to the airbag mechanism (302), and pipe No. 2 (305) is connected to the channel (205).

10. A storage device for crude grease from kitchen waste with impurity removal function according to claim 9, characterized in that: The airbag mechanism (302) includes a fixed plate (3021) and a movable plate (3022). The fixed plate (3021) is fixed to the bottom of the oil storage tank (101), and the movable plate (3022) is installed at the tail of the filter screen (105). An airbag body (3023) is sealed between the fixed plate (3021) and the movable plate (3022). The airbag body (3023) is provided with a central rod (3024) inside. The central rod (3024) is slidably inserted into the movable plate (3022). A tension spring (3025) is sleeved on the central rod (3024). The other end of the tension spring (3025) is connected to the movable plate (3022). After the pressure inside the airbag body (3023) decreases, the tension spring (3025) drives the movable plate (3022) to reset.

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