Patent Publication Number: US-2020284246-A1

Title: Vacuum pumping device and food processor

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     The present disclosure is a national phase application of International Application No. PCT/CN2018/099075, filed on Aug. 7, 2018, which claims the priorities of Chinese Application No. 201810190565.9, 201820318955.5, 201810191228.1, 201820318371.8, 201810191056.8 and 201820318266.4, filed with the Chinese Patent Office on Mar. 7, 2018, the entireties of which are herein incorporated by reference. 
    
    
     FIELD 
     The present disclosure relates to the field of food processors, and in particular, to a vacuum pumping device and a food processor using the vacuum pumping device. 
     BACKGROUND 
     Many ingredients are susceptible to spoilage due to being oxidized or bacteria-infested after coming in contact with the air. For example, juice is easily oxidized in contact with the air, which affects the taste of the juice. Therefore, some ingredients need to be isolated from the air. 
     In the existing food processor with an evacuation function, the vacuum pumping device is generally fixed to the machine base, which makes the overall structure of the vacuum pumping device more complicated, and makes the process of assembling the vacuum pumping device more difficult. 
     SUMMARY 
     Embodiments of the present disclosure are to provide a vacuum pumping device, which aims to simplify the structure of the vacuum pumping device, improve the convenience of assembling the vacuum pumping device, and improve the structural stability. 
     Embodiments of the present disclosure provide a vacuum pumping device, including: 
     an upper cover; 
     a lower cover configured to cooperate with the upper cover to form a receiving cavity and including a connecting part at a lower portion of the lower cover, a wall of the receiving cavity defining an evacuation hole and an exhaust hole; 
     a mounting support located in the receiving cavity and connected to the upper cover and/or the lower cover; 
     a vacuum pump connected to the mounting support, and including an air inlet communicating with the evacuation hole; and an air outlet communicating with the exhaust hole; 
     a control circuit board connected to the mounting support and electrically connected to the vacuum pump; and 
     a power supply device located in the receiving cavity and electrically connected to the control circuit board. 
     In one embodiment, the mounting support is configured to divide the receiving cavity into: an upper cavity, the control circuit board and the power supply device being both located in the upper cavity; and a lower cavity, the vacuum pump being located in the lower cavity and clamped and fixed by the lower cover and the mounting support; and/or the mounting support is detachably connected to the upper cover and/or the lower cover. 
     In one embodiment, the mounting support includes: a first mounting structure on a side of the mounting support towards the upper cover; and a second mounting structure on a side of the mounting support towards the lower cover. The upper cover includes a first locking structure, the mounting support being detachably connected to the upper cover through the cooperation of the first mounting structure and the first locking structure; and the lower cover includes a second locking structure, the mounting support being detachably connected to the lower cover through the cooperation of the second mounting structure and the second locking structure. 
     In one embodiment, the mounting support includes a base plate; the first mounting structure includes first buckles protruding from a side of the base plate towards the upper cover; and the first locking structure includes first buckle slots formed at an inner wall surface of the upper cover, each of the first buckles being inserted into one corresponding first buckle slot. 
     In one embodiment, the vacuum pumping device further includes a connecting member. The first mounting structure further includes a first connecting post protruding from the side of the base plate towards the upper cover, the first connecting post including a first connecting hole formed therein; and the first locking structure further includes a first locking hole formed at the upper cover, the connecting member being configured to fit in the first connecting hole and the first locking hole. 
     In one embodiment, the second mounting structure includes second buckles protruding from a side of the base plate towards the lower cover; and the second locking structure includes second buckle slots formed at an inner wall surface of the lower cover, each of the second buckles being inserted into one corresponding second buckle slot. 
     In one embodiment, the vacuum pumping device further includes a connecting member. The second mounting structure further includes a connecting cylinder protruding from a side of the base plate towards the lower cover; the base plate includes a second locking hole communicating with the connecting cylinder; and the second locking structure further includes a second connecting post protruding from an inner wall surface of the lower cover, the second connecting post including a second connecting hole formed therein, and the connecting member being configured to fit in the second connecting hole and the second locking hole. 
     In one embodiment, the lower cover includes the evacuation hole; and the upper cover or the lower cover includes the exhaust hole. 
     In one embodiment, the vacuum pumping device further includes a pressure relief switch assembly received in the receiving cavity. The lower cover further includes a pressure relief hole; and the upper cover or the lower cover includes an inlet hole, the pressure relief switch assembly being fixedly connected to the mounting support and configured to communicate with the pressure relief hole and the inlet hole. 
     In one embodiment, the vacuum pumping device further includes a check valve between the air inlet of the vacuum pump and the evacuation hole, the check valve being configured to communicate the air inlet with the evacuation hole and guide air flow in the direction from the evacuation hole to the air inlet. 
     In one embodiment, the vacuum pumping device further includes a sealing ring. The sealing ring is configured to: cover and seal a container to be evacuated, connect to the lower cover, and surround the exhaust hole. 
     In one embodiment, the connecting part is a connecting ring protruding from a surface of the lower cover opposite to the upper cover, the connecting ring being surrounding a periphery of the evacuation hole, and the sealing ring being sleeved outside the connecting ring; or the lower cover includes an annular clamp slot concavely formed at a surface of the lower cover opposite to the upper cover, the annular clamp slot being surrounding a periphery of the evacuation hole, and the sealing ring being embedded in the annular clamp slot. 
     In one embodiment, the lower cover includes an isolation and storage cavity formed at an outer wall of a bottom of the lower cover, and configured to communicate with the evacuation hole and a container to be evacuated. 
     In one embodiment, the vacuum pumping device further includes a cover plate detachably connected with the lower cover and including a screen hole communicating with the isolation and storage cavity. The lower cover includes a groove body formed at a surface of the lower cover opposite to the upper cover and inside the connecting part, an opening of the groove body being covered by the cover plate to form the isolation and storage cavity; and the evacuation hole is formed at a bottom wall of the groove body. 
     In one embodiment, the screen hole is in an elongated shape; and a width of the screen hole is defined as B, and B is greater than 0 and less than or equal to 0.8 mm. 
     In one embodiment, a distance between the cover plate and the bottom wall of the groove body is L, and L is greater than 1 mm and less than or equal to 10 mm. 
     The present disclosure further provides a food processor, including a stirring cup assembly, including: a cup body including an inner cavity; and a cup cover covering an upper end of the cup body, and including an opening communicating with the inner cavity of the cup body; and a vacuum pumping device detachably mounted on the cup cover and including: 
     an upper cover; 
     a lower cover configured to cooperated with the upper cover to form a receiving cavity and including a connecting part at a lower portion of the lower cover, a wall of the receiving cavity defining an evacuation hole and an exhaust hole; 
     a mounting support located in the receiving cavity and connected to the upper cover and/or the lower cover; 
     a vacuum pump connected to the mounting support, and including an air inlet communicating with the evacuation hole; and an air outlet communicating with the exhaust hole; 
     a control circuit board connected to the mounting support and electrically connected to the vacuum pump; and 
     a power supply device located in the receiving cavity and electrically connected to the control circuit board; the connecting part is configured to communicate with an inner cavity of the cup body through the opening. 
     In one embodiment, the vacuum pumping device further includes a cover plate detachably connected with the lower cover and including a screen hole communicating with an isolation and storage cavity; the lower cover includes a groove body formed at a surface of the lower cover opposite to the upper cover and inside the connecting part, an opening of the groove body being covered by the cover plate to form the isolation and storage cavity; and the evacuation hole is formed at a bottom wall of the groove body. 
     In one embodiment, the vacuum pumping device further includes a sealing ring. The sealing ring is configured to: cover and seal a container to be evacuated, connect to the connecting part, and surround the exhaust hole; and an area of the opening is defined as S1; an area surrounded by a connecting ring on the lower cover for mounting the sealing ring is defined as S2; an area surrounded by the sealing ring is defined as S3; and S1 is greater than S2 and less than S3. 
     In one embodiment, the cup cover includes a groove; the opening is formed at a bottom of the groove; and a peripheral edge of the sealing ring is abutted against a wall of the groove. 
     According to embodiments of the present disclosure, the mounting support of the vacuum pumping device is connected to the upper cover and/or the lower cover, so that the upper cover and the lower cover cooperate to form a receiving cavity, and the vacuuming pump is installed and fixed by means of the mounting support. As such, during the assembling process of the vacuum pumping device, components such as the vacuum pump, the control circuit board, the power supply device, etc., can be modularly assembled with the help of the mounting support, then the upper cover and the lower cover are assembled by means of the mounting support. In this way, the overall assembly efficiency is improved, and depending on the fixing method of the mounting support, the structural stability of the internal components of the entire vacuum pumping device, such as the vacuum pump, the control circuit board, and the power supply device, can also be guaranteed, and the structural stability is high. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to illustrate the embodiments of the present disclosure, the drawings used in the embodiments or the related art will be briefly described below. The drawings in the following description are only some embodiments of the present disclosure. 
         FIG. 1  is an exploded structural diagram of a vacuum pumping device according to an embodiment of the present disclosure; 
         FIG. 2  is a partial exploded structural diagram of the vacuum pumping device in  FIG. 1 ; 
         FIG. 3  is a schematic cross-sectional structural diagram of the vacuum pumping device in  FIG. 1 ; 
         FIG. 4  is a schematic perspective structural diagram of an upper cover of the vacuum pumping device in  FIG. 1 ; 
         FIG. 5  is a schematic perspective structural diagram of a mounting support of the vacuum pumping device in  FIG. 1 ; 
         FIG. 6  is a schematic perspective structural diagram of a lower cover of the vacuum pumping device in  FIG. 1 ; 
         FIG. 7  is a schematic structural diagram of a cover plate of the vacuum pumping device according to the present disclosure; 
         FIG. 8  is a schematic cross-sectional diagram taken along line A-A in  FIG. 7 ; and 
         FIG. 9  is a cross-sectional structural diagram of a part of a food processor according to the present disclosure. 
     
    
    
     DESCRIPTION OF REFERENCE NUMERALS 
       
     
       
         
           
               
               
               
             
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                 Label 
                 Name 
               
               
                   
                   
               
             
            
               
                   
                 300 
                 Food processor 
               
               
                   
                 200 
                 Stirring cup assembly 
               
               
                   
                 210 
                 Stirring cup 
               
               
                   
                 220 
                 Cup cover 
               
               
                   
                 221 
                 Opening 
               
               
                   
                 100 
                 Vacuum pumping device 
               
               
                   
                 110 
                 Upper cover 
               
               
                   
                 111 
                 First buckle slot 
               
               
                   
                 112 
                 First locking hole 
               
               
                   
                 110a 
                 Receiving cavity 
               
               
                   
                 110b 
                 Lower cavity 
               
               
                   
                 110c 
                 Upper cavity 
               
               
                   
                 110d 
                 Exhaust hole 
               
               
                   
                 120 
                 Mounting support 
               
               
                   
                 121 
                 Base plate 
               
               
                   
                 122 
                 First buckle 
               
               
                   
                 123 
                 First connecting post 
               
               
                   
                 124 
                 Second buckle 
               
               
                   
                 125 
                 Connecting cylinder 
               
               
                   
                 130 
                 Lower cover 
               
               
                   
                 131 
                 Second buckle slot 
               
               
                   
                 132 
                 Second connecting post 
               
               
                   
                 130a 
                 Evacuation hole 
               
               
                   
                 130b 
                 Pressure relief hole 
               
               
                   
                 133 
                 connecting part 
               
               
                   
                 133a 
                 Isolation and storage cavity 
               
               
                   
                 140 
                 Vacuum pump 
               
               
                   
                 150 
                 Control circuit board 
               
               
                   
                 160 
                 Power supply device 
               
               
                   
                 170 
                 Pressure relief valve assembly 
               
               
                   
                 180 
                 Sealing ring 
               
               
                   
                 190 
                 Cover plate 
               
               
                   
                 191 
                 Screen hole 
               
               
                   
                   
               
            
           
         
       
     
     DETAILED DESCRIPTION OF THE DISCLOSURE 
     Embodiments of the present disclosure will be described in the following with reference to the accompanying drawings. 
     It is to be understood that, all of the directional instructions in the embodiments of the present disclosure (such as up, down, left, right, front, rear . . . ) can only be used for explaining relative position relations, moving condition of the elements under a form as described in the figures, and so on, if the form changes, the directional instructions changes accordingly. 
     In the present disclosure, unless specified or limited otherwise, the terms “connected”, “fixed” and the like are used broadly. In one embodiment, “fixed” can be fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections; may also be direct connections or indirect connections via intervening structures, may also be inner connecting of two elements, or interaction relationship between two elements. 
     In addition, the descriptions, such as the “first”, the “second” in the embodiment of present disclosure, can only be used for describing the aim of description, and may not be understood as indicating or suggesting relative importance or impliedly indicating the number of the indicated feature. Therefore, the feature indicated by the “first”, the “second” can express or impliedly include at least one feature. 
     The present disclosure provides a vacuum pumping device  100 . 
     Referring to  FIG. 1  to  FIG. 6 , the vacuum pumping device  100  of the present disclosure is detachably connected to a container to be evacuated, and can perform evacuating treatment on the inside of the container. The vacuum pumping device  100  includes an upper cover  110 , a mounting support  120 , a lower cover  130 , a vacuum pump  140 , a control circuit board  150 , and a power supply device  160 . One side of the mounting support  120  is detachably connected to the upper cover  110 , and the lower cover  130  is detachably connected to the other side of the mounting support  120 . The lower cover  130  is configured to cooperate with the upper cover  110  to form a receiving cavity  110   a . A wall of the receiving cavity  110   a  defines an evacuation hole  130   a  and an exhaust hole  110   d . The vacuum pump  140  is fixed and connected to the mounting support  120 , an air inlet of the vacuum pump  140  is configured to communicate with the evacuation hole  130   a , and an air outlet of the vacuum pump  140  is configured to communicate with the exhaust hole  110   d . The control circuit board  150  is fixed and connected to the mounting support  120  and electrically connected to the vacuum pump  140 . The power supply device  160  is located in the receiving cavity  110   a  and electrically connected to the control circuit board  150 . It should be noted that the mounting support  120  may only be detachably connected to the upper cover  110  or may be detachably connected only to the lower cover  130 . 
     It should be noted that the lower cover  130  includes a connecting part  133  at a lower portion of the lower cover  130 . The connecting part  133  is configured to connect with other containers that need to be evacuated, so that the evacuating process is simpler, and the connecting process is more convenient and reliable. 
     The mounting support  120  is detachably connected to the upper cover  110  and/or the lower cover  130 . It can be understood that the upper cover  110  may be detachably connected or fixedly connected to the lower cover  130  and the mounting support  120 , such as integrally connected. The present embodiment may adopt a detachable connection manner. 
     The upper cover  110 , the lower cover  130 , and the mounting support  120  of the present disclosure may be made of a plastic material, or a metal material such as an aluminum alloy. The entire vacuum pumping device  100  is in a substantially cylindrical shape, that is, the upper cover  110  and the lower cover  130  are both cylindrical with a cover plate at one end, and the cross-sectional shape of the vacuum pumping device  100  may be circular, square, or polygonal. In one embodiment, the shape of the vacuum pumping device  100  may also be other structures, such as a spherical shape, that is, the upper cover  110  and the lower cover  130  are both hemispherical. The lower cover  130  includes an evacuation hole  130   a . During the assembling process of the vacuum pumping device  100 , the upper cover  110  and the lower cover  130  are fixedly connected together through the mounting support  120 . In addition, the control circuit board  150  and the vacuum pump  140  (including the pump body and the driving motor) are both installed by means of the mounting support  120 . The power supply device  160  may be a device to store electrical energy, such as a power supply lithium battery, a dry battery, etc., provided in the receiving cavity  110   a , and it may also be a power supply interface, such as a USB interface, a power interface with a pin, provided in the receiving cavity  110   a  and the upper cover  110  or the lower cover  130  includes a corresponding opening  221 . When the power supply device  160  is a device to store electrical energy, the vacuum pumping device  100  does not need an external power source. When the power supply device  160  is a power interface, the power supply device  160  can also be connected to the transformed mains power. A sealing structure may be provided between the container and the vacuum pumping device  100 . The sealing structure may be provided on the container or on the vacuum pumping device  100 , and the sealing structure may be a sealing ring  180  provided on the container or on the vacuum pumping device  100 . In one embodiment, the connecting part  133  of the present disclosure is a connecting ring  133  protruding from a surface of the lower cover  130  opposite to the upper cover  110 . The connecting ring  133  is surrounding a periphery of the evacuation hole  130   a . The sealing ring  180  is sleeved outside the connecting ring  133 ; or an annular clamp slot (not shown) is recessed on a surface of the lower cover  130  opposite to the upper cover  110 . The annular clamp slot is surrounding a periphery of the evacuation hole  130   a , and the sealing ring  180  is embedded in the annular clamp slot. During the use of the vacuum pumping device  100 , the vacuum pumping device  100  is directly placed at the opening  221  of the container, and the lower cover  130  overlaps the edge of the opening  221  of the container. When the vacuum pumping device  100  is started, the air in the container driven by the vacuum pump  140  enters through the evacuation hole  130   a  and is exhausted through the exhaust hole  110   d . When the evacuation is finished, the vacuum pumping device  100  and the container can be directly separated and placed separately. 
     In the present disclosure, the mounting support  120  of the vacuum pumping device  100  is connected to the upper cover  110  and/or the lower cover  130 , so that the upper cover  110  and the lower cover  130  cooperate to form the receiving cavity  110   a , and the vacuuming pump  140  is installed and fixed by means of the mounting support  120 . As such, during the assembling process of the vacuum pumping device  100 , components such as the vacuum pump  140 , the control circuit board  150 , the power supply device  160 , etc. can be modularly assembled with the help of the mounting support  120 , and then the upper cover  110  and the lower cover  130  are assembled by means of the mounting support  120 . In this way, the overall assembly efficiency is improved, and depending on the fixing method of the mounting support  120 , the structural stability of the internal components of the entire vacuum pumping device  100 , such as the vacuum pump  140 , the control circuit board  150 , and the power supply device  160 , can also be guaranteed, and the structural stability is high. 
     Further, the mounting support  120  of the present disclosure is configured to divide the receiving cavity  110   a  into an upper cavity  110   c  and a lower cavity  110   b . The vacuum pump  140  is located in the lower cavity  110   b  and is clamped and fixed by the lower cover  130  and the mounting support  120 . The control circuit board  150  and the power supply device  160  are both located in the upper cavity  110   c.    
     The evacuation hole  130   a  of the vacuum pumping device  100  is provided on the upper cover  130 . The vacuum pumping device  100  of the present disclosure includes a mounting support  120  to divide the receiving cavity  110   a  into two parts, an upper cavity  110   c  and a lower cavity  110   b . The vacuum pump  140 , the control circuit board  150 , and the power supply device  160  are reasonably arranged. Since the vacuum pump  140  is exposed to water vapor during the pumping process, the vacuum pump  140  is provided in the lower cavity  110   b , and the control circuit board  150  and the power supply device  160  are provided in the upper cavity  110   c . This arrangement can minimize the influence of water vapor and other factors on the control circuit board  150  and the power supply device  160  during the use of the vacuum pumping device  100 . The vacuum pump  140  is relatively heavy, and the vacuum pump  140  is provided in the lower cavity  110   b , which can also move the center of gravity of the vacuum pumping device  100  downward, and the entire structure can be more stable when the vacuum pumping device  100  is placed in a container. 
     In one embodiment, in order to improve the convenience of assembling the entire vacuum pumping device  100 , a first mounting structure is provided on a side of the mounting support  120  towards the upper cover  110 . The upper cover  110  is provided with a first locking structure. The mounting support  120  is detachably connected to the upper cover  110  through the cooperation of the first mounting structure and the first locking structure. A second mounting structure is provided on a side of the mounting support  120  towards the lower cover  130 . The lower cover  130  includes a second locking structure. The mounting support  120  is detachably connected to the lower cover  130  through the cooperation of the second mounting structure and the second locking structure. 
     The mounting support  120  of the present disclosure includes a base plate  121 . The first mounting structure includes first buckles  122  protruding from a side of the base plate  121  towards the upper cover  110 . The first locking structure includes first buckle slots  111  provided on an inner wall surface of the upper cover  110 . Each of the first buckles  122  is inserted into one corresponding first buckle slot  111 . 
     The first mounting structure further includes a first connecting post  123  protruding from a side of the base plate  121  towards the upper cover  110 . A first connecting hole is formed at the first connecting post  123 . The first locking structure further includes a first locking hole  112  formed at the upper cover  110 . The first connecting hole is cooperatively communicating with the first locking hole  112  through a connecting member. 
     The second mounting structure includes second buckles  124  protruding from a side of the base plate  121  towards the lower cover  130 . The second locking structure includes second buckle slots  131  provided on an inner wall surface of the lower cover  130 . Each of the second buckles  124  is inserted into one corresponding second buckle slot  131 . 
     The second mounting structure further includes a connecting cylinder  125  protruding from a side of the base plate  121  towards the lower cover  130 . The base plate  121  is provided with a second locking hole communicating with the connecting cylinder  125 . The second locking structure further includes a second connecting post  132  protruding from an inner wall surface of the lower cover  130 . A second connecting hole is formed at the second connecting post  132 . The second connecting hole is cooperatively communicating with the second locking hole through a connecting member. 
     The upper cover  110  of the present disclosure is detachably connected to the mounting support  120  through the cooperation of the first mounting structure and the first locking structure. During the process of assembling the upper cover  110  and the mounting support  120 , the cooperation of the first buckle  122  and the first buckle slot  111  can provide a preliminary fixed positioning for the assembly of the upper cover  110  and the mounting support  120 . First buckles  122  and the first buckle slots  111  may be provided spaced. The power supply device  160  and the control circuit board  150  are first fixed on the mounting support  120 . The mounting support  120  is provided with limiting ribs. The plurality of limiting ribs can clamp and fix the power supply device  160  and the control circuit board  150 , and can be further fixed by screws. Next, align the first buckle  122  and the first buckle slot  111  to realize the preliminary fixing of the upper cover  110  and the mounting support  120 . Then, through the cooperation of the connecting member (screw), the first connecting hole and the first locking hole  112 , the upper cover  110  and the mounting support  120  can be fixed and assembled. 
     The lower cover  130  is detachably connected to the mounting support  120  through the cooperation of the second mounting structure and the second locking structure. The cooperation of the second buckle  124  and the second buckle slot  131  provides a preliminary fixed positioning for the process of assembling the lower cover  130  and the mounting support  120 . Second buckles  124  and the second buckle slots  131  may be provided spaced. The vacuum pump  140  is clamped and fixed. The mounting support  120  or the lower cover  130  may be provided with a mounting groove, and the vacuum pump  140  is embedded in the mounting groove. Then, through the cooperation of the connecting member (screw), the second connecting hole and the second locking hole, the lower cover  130  and the mounting support  120  can be fixed and assembled. 
     As can be seen, in the present disclosure, the connecting structures cooperating with the upper cover  110  and the lower cover  130  are respectively provided on both sides of the mounting support  120 , and the process of assembling the vacuum pumping device  100  is simplified, and the structural stability of the entire vacuum pumping device  100  is also improved. 
     The inside of the vacuum pumping device  100  of the present disclosure is sequentially communicated with an evacuation hole  130   a , a vacuum pump  140 , a receiving cavity  110   a , and an exhaust hole  110   d  provided on the lower cover  130  to form an evacuation gas path. The exhaust hole  110   d  may be provided in the upper cover  110  or the lower cover  130 . A gap may be provided between the mounting support  120  and the inner wall of the upper cover  110  or the lower cover  130 , and the gap forms the exhaust hole  110   d . The exhaust hole  110   d  may also be separately disposed in the lower cover  130  so that the exhaust hole  110   d  communicating with the receiving cavity  110   a  is configured to communicate with the exhaust port of the vacuum pump  140 . In one embodiment, the mounting support  120  includes a hollow hole so that the exhaust port of the vacuum pump  140  located at the lower part communicates with the exhaust hole  110   d . Such a structural setting makes the air circuit design of the vacuum pumping device  100  relatively simple. At the same time, during the exhaust process, the heat of electronic components such as the vacuum pump  140  and the control circuit board  150  can be taken away by the air flow. It should be noted that since the gap or the hollow hole is located on the edge of the mounting support  120 , it is not easy to stay on the control circuit board  150  and the power supply device  140  even if part of the airflow flows. In the present disclosure, a waterproof partition may be protruded on the side of the base plate  121  towards the upper cover  110  and near the edge of the mounting support  120  to prevent the air current with water vapor from rushing directly to the power supply device  140  and the control circuit board  150 . In order to ensure the stability of the vacuum pumping device  100  of the present disclosure during the operation, the evacuation hole  130   a  may be covered with a layer of air-permeable and waterproof material, so that during the evacuation process, the ingredients are not easily brought into the evacuation hole  130   a  and cause the blockage of the vacuum air path. Further, a check valve between the air inlet of the vacuum pump  140  and the evacuation hole  130   a  is configured to communicate the air inlet with the evacuation hole and guide air flow in a direction from the evacuation hole  130   a  to the air inlet. 
     In other evacuation gas paths, a ventilation pipe structure may also be formed inside the mounting support  120 , and the ventilation pipe extends all the way and penetrates through the edge of the mounting support  120 . In addition, the opening  221  of the ventilation pipe at the edge of the mounting support  120  communicates with the exhaust hole  110   d  at the upper cover  110  or the lower cover  130 . The exhaust port of the vacuum pump  140  directly communicates with the other end opening  221  of the ventilation pipe structure on the mounting support  120 . This can make the air circuit structure of the entire vacuum pumping device  100  simpler. 
     Further, the lower cover  130  further includes a pressure relief hole  130   b . A pressure relief switch assembly is also received in the receiving cavity  110   a . The upper cover  110  or the lower cover  130  includes an inlet hole. The pressure relief switch assembly is fixedly connected to the mounting support  120  and is configured to communicate with the pressure relief hole  130   b  and the inlet hole. 
     In the present disclosure, the pressure relief air path includes the pressure relief hole  130   b , an air inlet hole, and a pressure relief valve assembly  170 . The pressure relief valve assembly  170  may include a pressure relief valve and some pipelines. The pressure relief hole  130   b  and the evacuation hole  130   a  are spaced apart, and the air inlet hole may be separated from the exhaust hole  110   d  or may be shared. Besides, in the present disclosure, the upper cover  110  is also provided with a start button corresponding to the vacuum pump  140  and the pressure relief valve. By forming a pressure relief gas path, when the vacuum pumping device  100  realizes the vacuuming operation on the container and further processes the ingredients, the pressure relief valve can be activated by pressing the start button of the pressure relief valve on the upper cover  110 . As such, the entry of external air and the internal and external balance of the pressure in the container are achieved, so that the pressure relief valve is easily removed. 
     In one embodiment, in order to block some large-volume ingredients outside the vacuum pumping device  100 , please refer to  FIG. 3 ,  FIG. 7 , and  FIG. 8 , a groove body (not shown) is formed on a surface of the lower cover  130  opposite to the upper cover  110  through a connecting ring  133 . The evacuation hole  130   a  is defined on a bottom wall of the groove body. The lower cover  130  is also detachably connected with a cover plate  190 . The cover plate  190  includes a screen hole  191  communicating with the isolation and storage cavity  133   a.    
     In the present disclosure, the groove body is formed on a surface of the lower cover  130  opposite to the upper cover  110 , the evacuation hole  130   a  is defined on a bottom wall of the groove body, the lower cover  130  may also be detachably connected with a cover plate  190  covering the opening of the groove body, the cover plate  190  includes a screen hole  191  communicating with the isolation and storage cavity  133   a , and the cover plate  190  can not only block large-volume ingredients outside the vacuum pumping device  100 , but also ensure that the container can communicate with the evacuation hole  130   a  through the screen hole  191  on the cover plate  190 . Therefore, it is ensured that the air in the container can still pass through the evacuation hole  130   a , and then be exhausted to the outside of the container by the action of the vacuum pump  140 . Besides, the cover plate  190  can be detachably connected to the lower cover  130 , and by removing the cover plate  190 , the user can achieve the effect of conveniently cleaning the inner wall of the isolation and storage cavity  133   a.    
     It should be appreciated that the screen hole  191  may be a circular hole, a square hole or a linear hole. The cover plate  190  can be screw-connected, snap-connected or magnetically connected to the groove body. When the cover plate  190  is buckled with the groove body, the cover plate  190  may be made of a flexible material, such as silicone. 
     Further, in order to better achieve the effect of blocking the ingredients, please specifically combine  FIG. 7  and  FIG. 8 , the screen hole  191  is in an elongated shape, a width of the screen hole  191  is defined as B, and B is greater than 0 and less than or equal to 0.8 mm. 
     In the present disclosure, the screen hole  191  is in an elongated shape, a width B of the screen hole  191  is greater than 0 and less than or equal to 0.8 mm, and the screen hole  191  can block most of the ingredients. If B is greater than 0.8 mm, the width of the screen hole  191  is too wide, so that many ingredients can pass through the screen hole  191 , and more ingredients are adhered to the inner wall of the isolation and storage cavity  133   a , and then the evacuation hole  130   a  will be blocked after a period of time, which affects the normal use of the vacuum pumping device  100 . 
     Referring to  FIG. 8  again, a thickness of the area of the cover plate  190  provided with the screen hole  191  is defined as D, D is greater than 0.2 mm and less than or equal to 1.2 mm. 
     In the present disclosure, the thickness D of the area of the cover plate  190  provided with the screen hole  191  is greater than 0.2 mm and less than or equal to 1.2 mm, and the cover plate  190  can not only withstand an impact strength, but also ensure a better ventilation effect. If the thickness D of the area of the cover plate  190  provided with the screen hole  191  is less than or equal to 0.2 mm, the thickness of the cover plate  190  is small and it is difficult to ensure the strength of the cover plate  190  after the screen hole  191  is provided. If D is greater than 1.2 mm, the thickness of the cover plate  190  is thicker and affects the effect of sucking air in the container. 
     Further, a distance between the cover plate  190  and the bottom wall of the groove body is defined as L, L is greater than 1 mm and less than or equal to 10 mm. 
     In the present disclosure, the distance L between the cover plate  190  and the bottom wall of the groove body is greater than 1 mm and less than or equal to 10 mm, and the isolation and storage cavity  133   a  has a more suitable space to accommodate the adsorbed food materials, which can ensure that the food materials do not easily block the evacuation hole, and also ensure better air intake efficiency. If the distance L between the cover plate  190  and the bottom wall of the groove body is less than or equal to 1 mm, the depth of the cavity of the isolation and storage cavity  133   a  is relatively shallow, so that the food material quickly fills the cavity, requiring the user to frequently clean the inner wall of the isolation and storage cavity  133   a . If the distance L between the cover plate  190  and the bottom wall of the groove body is greater than 10 mm, the depth of the cavity of the isolation and storage cavity  133   a  is relatively deep, so that after an amount of food is accumulated in the cavity, the efficiency of air extraction is affected. 
     Referring to  FIG. 9 , the present disclosure further provides a food processor  300 , including a stirring cup assembly  200 . The stirring cup assembly  200  includes a cup body and a cup cover  220  covering an upper end of the cup body. The cup cover  220  includes an opening  221  communicating with an inner cavity of the cup body. The food processor  300  further includes a vacuum pumping device  100  detachably mounted on the cup cover  220 . The specific structure of the vacuum pumping device refers to the above embodiments. The vacuum pumping device  100  is configured to communicate with the inner cavity of the cup body through the opening  221 . 
     In the present disclosure, the food processor  300  includes the vacuum pumping device  100 . The vacuum pumping device  100  can be directly placed on the cup cover  220  during use, and the entire assembly process is convenient. In order to further improve the convenience of the assembly process, in the present disclosure, a first magnetic piece (either a magnet or a magnetic metal) may be further fixed on the lower cover  130  and a second magnetic piece (either a magnet or a magnetic metal) may be fixed on the cup cover  220 . The first magnetic piece and the second magnetic piece may be in a ring shape or provided in a plurality and arranged in a ring shape spaced. As such, when the vacuum pumping device  100  is placed, rapid positioning can be achieved through the magnetic adsorption of the first magnetic piece and the second magnetic piece, which is more convenient. 
     Further, an area of the opening  221  is defined as S1, an area surrounded by a connecting ring  133  on the lower cover  130  for mounting the sealing ring  180  is defined as S2, and an area surrounded by the sealing ring  180  is defined as S3, and S1 is greater than S2 and less than S3. 
     The opening  221  of the present disclosure may be circular or square. The projections of the opening  221 , the connecting ring  133 , and the sealing ring  180  are arranged on the same horizontal plane, so that it can ensure tight sealing and easier assembly when vacuuming. 
     Further, the cup cover  220  is provided with a groove. The opening  221  is defined at a bottom of the groove. A peripheral edge of the sealing ring  180  is abutted against a wall of the groove. The setting of the groove makes it easier to align and place the vacuum pumping device  100  during use. In addition, during the evacuation process, the sealing ring  180  is attracted to be closer to the opening periphery of the cup cover  220 .