Vacuum blender

Abstract

The present invention relates to a vacuum blender and, more particularly, to a vacuum blender capable of preventing fine particles from flowing into a vacuum pump by sensing fine particles or moisture flowing backward during operation of the vacuum blender. The vacuum blender of the present invention comprises: a main body provided with a motor; a vacuum pump; a grinding container which is coupled to the main body and has formed therein a mixing space in which food is accommodated; a container cover which is coupled to the upper portion of the grinding container to cover the upper portion of the mixing space, and has a first discharge hole formed therethrough; a communication portion which places the first discharge hole of the container cover in communication with the vacuum pump; a backflow detection sensor which senses the fine particles in the grinding container flowing backward and moving to the vacuum pump through the first discharge hole of the container cover due to the suction force of the vacuum pump; and a controller which controls the vacuum blender so as to block the backflow of the fine particles to the vacuum pump according to a sensing result of the backflow detection sensor.

Description

vacuum blender

[0001] The present invention relates to a vacuum blender, and more particularly to a vacuum blender for detecting backflow of fine water or moisture during the operation of the vacuum blender and preventing the fine water, etc. from entering the vacuum pump.

[0002] A blender is one of the most widely used electrical appliances in households today. It allows food items such as fruits, vegetables, and grains to be placed inside a mixing container and finely ground using a rotating blade installed at the bottom of the grinding container, making the food ready for consumption.

[0003] Conventional blenders place food to be ground into the grinding container, close the lid, and rotate the blades using a high-speed motor; during this process, the air inside the container, the ground food, and liquids are mixed at high speed, generating a large amount of foam.

[0004] For example, when fruits such as bananas and tomatoes are put into a blender and ground, a large amount of bubbles are produced at the top of the fruit juice.

[0005] This not only degrades the taste and texture when drinking fruit juice, but also means that a significant portion of the nutrients are destroyed because the fruit fiber has already oxidized during the grinding process.

[0006] Furthermore, if food must be stored rather than consumed immediately after grinding, leaving it exposed to air accelerates the oxidation process, which in turn speeds up the destruction of fiber and nutrients, causes discoloration and a decline in freshness, and leads to separation of layers between the food and the air.

[0007] As such, there was a problem in that food ground by a blender was difficult to store for a long period if not consumed immediately.

[0008] To address these issues, vacuum blenders with various structures have recently been developed and released.

[0009] When liquid food is placed inside the grinding container of a vacuum blender and ground, fine food particles are often drawn into the vacuum pump (backflow) by vacuum suction, frequently causing the vacuum pump and pressure sensor to malfunction.

[0010] As described above, in order to prevent the backflow of food containing liquid, there was a problem with the use of the blender where the maximum amount of food that can be put in the grinding container is marked, or where the user must visually check whether backflow is occurring during operation.

[0011] The present invention aims to solve the aforementioned problems by providing a vacuum blender that can prevent performance degradation or breakdown of the vacuum pump, etc., by preventing fine food particles containing liquid from moving to the vacuum pump by vacuum suction force, and can be used as conveniently and safely as possible.

[0012] To achieve the above objective, the vacuum blender of the present invention comprises: a main body equipped with a motor; a vacuum pump; a grinding container coupled to the main body and having a mixing space formed therein for containing food; a container cover coupled to the upper part of the grinding container, covering the upper part of the mixing space, and having a first discharge hole formed through it; a connecting part that communicates the first discharge hole of the container cover with the vacuum pump; a backflow detection sensor that detects that fine water in the grinding container moves back to the vacuum pump through the first discharge hole of the container cover by the suction force of the vacuum pump; and a control part that controls the vacuum blender to block the backflow of fine water to the vacuum pump according to the detection result of the backflow detection sensor.

[0013] The control unit controls the vacuum pump according to the detection result of the backflow detection sensor, and when the vacuum pump is in operation, if the backflow detection sensor detects backflow of fine water, the control unit stops the operation of the vacuum pump.

[0014] The control unit further comprises a solenoid valve, and the control unit controls the solenoid valve according to the detection result of the backflow detection sensor. When the backflow detection sensor detects backflow of fine particles while the vacuum pump is operating, the control unit controls the solenoid valve to block the movement of air moving to the vacuum pump through the connecting part.

[0015] The control unit further comprises a solenoid valve, and the control unit controls the solenoid valve according to the detection result of the backflow detection sensor. When the backflow detection sensor detects backflow of fine matter while the vacuum pump is operating, the control unit controls the solenoid valve to release the vacuum pressure of the connecting part or the crushing container.

[0016] When the backflow detection sensor detects backflow of fine particles while the vacuum pump is operating, the control unit switches the direction of air movement through the connecting part to a location other than the vacuum pump.

[0017] The above-mentioned connecting part is formed to include a hollow passage, and the above-mentioned backflow detection sensor is composed of a first sensor that detects fine particles flowing back through the hollow passage.

[0018] The apparatus further comprises a foreign matter receiving member detachably coupled to the container cover or connecting part, and having a receiving portion formed therein for receiving fine matter generated during food grinding by backflow due to the suction force from the operation of the vacuum pump; wherein the backflow detection sensor is composed of a second sensor that detects the level of fine matter received in the foreign matter receiving member, and the control unit stops the operation of the vacuum pump when the level of fine matter detected by the second sensor exceeds a preset height.

[0019] A hollow projection is formed protruding upwardly in the above foreign matter receiving member, and the second sensor detects the level of fine matter at a position lower than the top of the hollow projection.

[0020] A barrier wall is formed protruding downward from the upper side of the foreign matter receiving member, wherein the lower end of the barrier wall is lower than the uppermost end of the hollow projection, the barrier wall is positioned between the hollow projection and the second sensor, and the second sensor is positioned at a higher position than the lower end of the barrier wall.

[0021] The above connecting part is mounted on or connected to the grinding container, container cover, or handle of the grinding container.

[0022] The above-mentioned backflow detection sensor further includes a notification unit that notifies the outside when it detects fine water.

[0023] The apparatus further comprises a third sensor for measuring the liquid level of the food contained in the grinding container; wherein the control unit prevents the operation of the motor or vacuum pump when the liquid level of the grinding container measured by the third sensor exceeds a preset level.

[0024] The third sensor is mounted on the connecting part, and the connecting part is equipped with an elastic member that elastically supports the third sensor in the direction of the grinding container, wherein the third sensor measures the liquid level of the grinding container while in close contact with the outer surface of the grinding container by means of the elastic member.

[0025] The third sensor is mounted on the grinding container, a first ground is mounted on the upper part of the main body, and a second ground is mounted on the lower part of the grinding container; when the grinding container is coupled to the upper part of the main body, the first ground and the second ground are connected to supply electricity to the third sensor.

[0026] The above-mentioned connecting part is mounted on the grinding container or the handle of the grinding container, and the backflow detection sensor is composed of a first sensor that detects fine particles moving through the connecting part, wherein a first ground is mounted on the upper part of the main body and a second ground is mounted on the lower part of the grinding container, and when the grinding container is coupled to the upper part of the main body, the first ground and the second ground are connected to supply electricity to the first sensor.

[0027]

[0028] In addition, the vacuum blender of the present invention comprises: a main body equipped with a motor and a vacuum pump; a grinding container coupled to the main body and having a mixing space formed therein for containing food; a container cover coupled to the upper part of the grinding container, covering the upper part of the mixing space, and having a first discharge hole formed therethrough; a communication part that communicates the first discharge hole of the container cover with the vacuum pump; a third sensor that measures the liquid level of the food contained in the grinding container; a control part that controls the vacuum pump according to the detection result of the third sensor; and a notification part that notifies the detection result of the third sensor to the outside; wherein, before the motor and vacuum pump operate, if the liquid level of the grinding container measured by the third sensor exceeds a preset level, the control part notifies the outside through the notification part and prevents the motor or vacuum pump from operating.

[0029] According to the vacuum blender of the present invention as described above, the following effects are achieved.

[0030] The present invention can prevent the vacuum pump, etc. from malfunctioning by allowing fine water (backflow) to enter the vacuum pump and causing the vacuum pump to malfunction, by detecting the backflow detection sensor when fine water or moisture containing liquid flows back due to vacuum suction force, and then stopping the operation of the vacuum pump, blocking the movement of air, releasing the vacuum pressure, or diverting the movement of air to another location.

[0031] In particular, when vacuum depressurization is applied to dairy products, the volume expands significantly, increasing the risk of backflow. However, the present invention, through the configuration and operation described above, can prevent the vacuum pump and other components from malfunctioning or degrading in performance, and is safe and convenient as the user does not need to constantly monitor the vacuum blender due to concerns about backflow.

[0032] FIG. 1 is a structural diagram of a vacuum blender according to a first embodiment of the present invention,

[0033] FIG. 2 is a structural diagram of a vacuum blender according to a second embodiment of the present invention,

[0034] FIG. 3 is a structural diagram of a vacuum blender according to a third embodiment of the present invention.

[0035] FIG. 4 is a structural diagram of a vacuum blender according to the fourth embodiment of the present invention.

[0036] [Explanation of Drawing Symbols]

[0037] 10: Main body, 11: Motor, 12: Vacuum pump,

[0038] 20: Grinding container, 30: Container cover, 31: First discharge port, 32: Check valve,

[0039] 40: Connecting part, 41: Hollow passage, 45: Elastic member,

[0040] 50: Foreign matter receiving member, 51: Receiving part, 52: Hollow projection, 53: Second discharge hole, 54: Barrier wall,

[0041] 61: 1st sensor, 62: 2nd sensor, 63: 3rd sensor,

[0042] 66: 1st ground, 67: 2nd ground

[0043] First embodiment

[0044] As shown in FIG. 1, the vacuum blender of the present invention comprises a main body (10), a vacuum pump (12), a crushing container (20), a container cover (30), a connecting part (40), a backflow detection sensor, a control part, a notification part, etc.

[0045] The above main body (10) is equipped with a motor (11), etc.

[0046] The above vacuum pump (12) is configured to perform vacuum work as previously known.

[0047] The grinding container (20) is detachably coupled to the upper part of the main body (10), and a mixing space is formed inside for accommodating food.

[0048] The container cover (30) is attached to the upper part of the grinding container (20) and covers the upper part of the mixing space.

[0049] A first discharge hole (31) is formed through the container cover (30) to communicate the mixing space to the outside.

[0050] The first discharge port (31) is equipped with a check valve (32), etc.

[0051]

[0052] The above communication part (40) connects the first discharge hole (31) of the container cover (30) and the vacuum pump (12) for vacuum operation.

[0053] These connecting parts (40) can be formed in various shapes and structures at various locations.

[0054] For example, the above-mentioned connecting part (40) may be mounted or connected to the grinding container (20), the container cover (30), or the handle of the grinding container (20).

[0055] As in Registered Patent No. 10-2371439, the above connecting part (40) may have one end connected to the main body (10) and the other end positioned on the upper part of the crushing container (20).

[0056] The above connecting part (40) may be formed on the handle of the crushing container (20) as in registered patent No. 10-2488655.

[0057] Alternatively, the above-mentioned communication part may be connected through a chamber-shaped structure as in Registered Patent No. 10-2507566.

[0058] As described above, the above-mentioned connecting part (40) is formed with various conventional known structures, and it is sufficient to connect the first discharge hole (31) of the container cover (30) and the vacuum pump (12) to each other.

[0059] And a hollow passage (41) is formed inside the above-mentioned connecting part (40) to allow air to move.

[0060] The above hollow passage (41) may be made of a hose or may be formed of an empty space of an injection molded product.

[0061] The above backflow detection sensor detects that fine particles generated during the grinding of food are moving back to the vacuum pump (12) through the first discharge hole (31) of the container cover (30) by the suction force of the vacuum pump (12).

[0062] In this embodiment, the backflow detection sensor is composed of a first sensor (61).

[0063] The first sensor (61) detects fine particles flowing back through the hollow passage (41) formed in the connecting part (40).

[0064] That is, the first sensor (61) detects moving liquid (water, etc.).

[0065]

[0066] It is sufficient for the above-mentioned first sensor (61) to be able to detect the movement of the liquid, so a detailed description thereof is omitted.

[0067] It is preferable that the first sensor (61) be a capacitive non-contact sensor capable of detecting liquid.

[0068] The first sensor (61) can be mounted at various locations in the connecting part (40) as needed, but it is preferable that the first sensor (61) be installed close to the check valve (32) in order to prevent backflow from entering the hollow passage (41) as much as possible.

[0069] When the above motor (11) and vacuum pump (12) are operated, if the fine material in the crushing container (20) moves to the vacuum pump (12) through the connecting part (40) by the vacuum suction force of the vacuum pump (12), the first sensor (61) detects the fine material moving through the hollow passage (41) of the connecting part (40).

[0070] The above control unit controls the vacuum pump (12) according to the detection result of the first sensor (61).

[0071] When the first sensor (61) detects backflowing fine particles, the control unit stops the operation of the vacuum pump (12) so that the fine particles move to the vacuum pump (12) and prevent the vacuum pump (12) from being damaged or its performance degraded.

[0072] Alternatively, if the first sensor (61) detects backflowing fine particles, the control unit may use a solenoid valve (not shown) to block the movement of air moving to the vacuum pump (12) through the connecting part (40), or use a solenoid valve to release the vacuum pressure of the connecting part (40) or the crushing container (20), or divert the direction of air movement through the connecting part (40) to another place other than the vacuum pump (12), for example, to the outside.

[0073] This prevents fine water from moving to the vacuum pump (12) by the vacuum suction force of the vacuum pump (12).

[0074] The above notification unit is configured to notify the outside through a lamp, sound, etc., when the first sensor (61) detects fine particles.

[0075] That is, when the first sensor (61) detects backflowing fine water, the control unit stops the operation of the vacuum pump (12) and simultaneously activates the notification unit so that the user can quickly recognize that the fine water is backflowing into the vacuum pump (12).

[0076] In this way, the present invention can prevent the fine liquid (reverse liquid) from flowing into the vacuum pump (12) and causing the vacuum pump (12) to malfunction, degrade in performance, or become contaminated by stopping the operation of the vacuum pump (12) after the reverse liquid is detected by the vacuum suction force of the vacuum pump (12) when the fine liquid is reversed.

[0077] The failure of the above vacuum pump (12) includes damage to the check valve, etc., mounted on the vacuum pump (12), and this meaning applies equally to all of the present invention.

[0078]

[0079] Second embodiment

[0080] The second embodiment differs from the first embodiment in that it further includes a foreign matter receiving member (50) as shown in FIG. 2 and the backflow detection sensor includes a second sensor (62), and will be explained with this in mind.

[0081] The above foreign matter receiving member (50) is attached to the container cover (30) or the connecting part (40) in a way that allows it to be attached and detached, and is fixedly attached using a known locking structure, etc.

[0082] Since the specific structure in which the above foreign matter receiving member (50) is mounted is sufficient by using a conventional known structure, a description thereof is omitted.

[0083] In the parts where air moves, such as the foreign matter receiving member (50) and the hollow passage (41), the inflow and outflow of internal and external air is blocked using materials such as elastic gasket rubber.

[0084] A receiving portion (51) is formed inside the above foreign matter receiving member (50), and fine matter generated during the grinding of food flows back into the receiving portion (51) by the vacuum suction force generated when the vacuum pump (12) operates.

[0085] The above-mentioned foreign matter receiving member (50) can be mounted at various locations and is formed with various conventional known structures and shapes, and any location where a structure capable of accommodating backflow and a sensor can detect it is possible.

[0086] For example, the foreign matter receiving member (50) can be mounted at various locations, such as the handle portion of the crushing container (20), the lower portion of the container cover (30), the upper portion of the container cover (30), or the upper or middle portion of the connecting portion (40).

[0087] The above backflow detection sensor comprises a second sensor (62) that detects the water level of fine matter contained in the foreign matter receiving member (50).

[0088] The above backflow detection sensor may consist of only one of the first sensor (62) and the second sensor (62), or it may include both the first sensor (61) and the second sensor (62) as shown in FIG. 2.

[0089] The second sensor (62) is positioned adjacent to the foreign object receiving member (50).

[0090] The second sensor (62) may be directly mounted on the foreign matter receiving member (50), or may be mounted in the mounting groove into which the foreign matter receiving member (50) is inserted.

[0091] The above-mentioned second sensor (62) is composed of a capacitive non-contact sensor and detects the amount of liquid contained in the foreign matter receiving member (50).

[0092] The second sensor (62) may be a contact sensor, but it is preferable that it be a non-contact sensor for hygiene purposes regarding food.

[0093] The control unit stops the operation of the vacuum pump (12) when the level of fine matter detected by the second sensor (62), that is, the level of fine matter contained in the foreign matter receiving member (50), exceeds a preset height.

[0094] Specifically, when fine matter in the crushing container (20) moves to and is received by the foreign matter receiving member (50) by the vacuum suction force generated when the vacuum pump (12) is operated, if the second sensor (62) detects that the level of the fine matter received by the foreign matter receiving member (50) has exceeded a preset height, the control unit stops the operation of the vacuum pump (12) to prevent the fine matter from moving to the vacuum pump (12) and causing damage, performance degradation, or contamination of the vacuum pump (12).

[0095] Alternatively, as described above, when the second sensor (62) detects fine particles, the control unit may use a solenoid valve (not shown) to block the movement of air moving to the vacuum pump (12) through the connecting part (40), use a solenoid valve to release the vacuum pressure of the connecting part (40) or the crushing container (20), or use a solenoid valve to divert the direction of air movement through the connecting part (40) to another place other than the vacuum pump (12), for example, to the outside.

[0096] The above notification unit is configured to notify the outside through a lamp, sound, etc., when the second sensor (62) detects fine particles.

[0097] In this way, when the fine water in the foreign matter receiving member (50) exceeds a preset appropriate level, the notification unit notifies the outside, and the user can separate the foreign matter receiving member (50), discard the fine water contained in the foreign matter receiving member (50), and wash it.

[0098] In addition, a hollow projection (52) may be formed protruding upwardly in the above foreign matter receiving member (50).

[0099] Of course, the above foreign matter receiving member (50) may not have the above hollow projection (52).

[0100] Fine matter received in the foreign matter receiving member (50) by the above hollow protrusion (52) is accumulated at a height lower than the height of the above hollow protrusion (52).

[0101] Fine particles may be introduced into the interior of the foreign matter receiving member (50) through the hollow protrusion (52) or through another path, and the fine particles introduced into the interior of the foreign matter receiving member (50) are accumulated inside the foreign matter receiving member (50) by the hollow protrusion (52).

[0102] When the above hollow protrusion (52) is formed, the second sensor (62) detects the water level of fine matter at a position lower than the top of the above hollow protrusion (52).

[0103] At this time, the foreign matter receiving member (50) has a second discharge hole (53) formed therein that communicates with the hollow passage (41) of the communication part (40), and the second sensor (62) is positioned lower than the second discharge hole (53).

[0104] And, a barrier wall (54) is formed protruding downward from the top on the inner side of the foreign matter receiving member (50).

[0105] The bottom of the above barrier wall (54) is lower than the top of the above hollow protrusion (52), and the above barrier wall (54) is positioned between the above hollow protrusion (52) and the second sensor (62).

[0106] The above barrier wall (54) may be formed in a plate shape, or may be formed in a ring shape that surrounds the hollow protrusion (52).

[0107] The second sensor (62) is positioned higher than the bottom of the barrier wall (54).

[0108] Due to the above-mentioned barrier wall (54), when fine water (backflow) flowing into the interior of the foreign water receiving member (50) rapidly swells or is strongly ejected into the interior of the foreign water receiving member (50), the second sensor (62) is positioned opposite to the hollow protrusion (52) relative to the barrier wall (54), so the barrier wall (54) blocks and prevents this, thereby preventing the second sensor (62) from detecting an incorrect water level when the fine water rapidly swells or is strongly ejected.

[0109] That is, by blocking fine water from sloshing around the barrier wall (54), it is possible to prevent the second sensor (62) from incorrectly measuring the water level inside the foreign matter receiving member (50).

[0110] Meanwhile, the present invention may further include a third sensor (63) for measuring the liquid level of the food contained in the grinding container (20).

[0111] The third sensor (63) may be mounted on the crushing container (20), or may be mounted on the main body (10) or the connecting part (40) at the rear of the crushing container (20).

[0112] The control unit prevents the operation of the motor (11) and / or vacuum pump (12) when the liquid level of the crushing container (20) measured by the third sensor (63) exceeds a preset level. At this time,

[0113] The above control unit notifies the outside through the above notification unit, thereby enabling the user to easily recognize it.

[0114] At this time, the preset water level refers to a height at which the liquid does not flow back through the first discharge hole (31) when food inside the grinding container (20) is ground.

[0115] That is, before operating the vacuum blender, consumers mix solids such as vegetables, fruits, and vegetables with liquids such as water and milk in the grinding container (20) and then operate it.

[0116] Since solids such as vegetables and fruits vary in volume and size, detecting the liquid level of water or milk is more effective for preventing backflow and ensuring accurate sensor measurements when mixed together.

[0117] Since the third sensor (63) measures the liquid level excluding solids among the food contained inside the grinding container (20), it is possible to prevent the liquid from flowing back when grinding food by adding too much liquid inside the grinding container (20).

[0118] This prevents the user from putting too much liquid into the crushing container (20), and thus prevents the liquid that is excessively filled in the crushing container (20) from flowing back to the vacuum pump (12).

[0119] The third sensor (63) is mounted on the connecting part (40), and the connecting part (40) may be equipped with an elastic member (45) that elastically supports the third sensor (63) in the direction of the crushing container (20).

[0120] By means of the elastic member (45), the third sensor (63) moves toward the outer surface of the crushing container (20) and is always in close contact with the outer surface of the crushing container (20), thereby enabling more accurate measurement of the liquid level of the crushing container (20).

[0121] That is, when food is ground in the grinding container (20), the grinding container (20) shakes. In this invention, since the third sensor (63) is always in close contact with the outer surface of the grinding container (20) by the elastic member (45), the third sensor (63) can accurately measure the liquid level inside the grinding container (20) regardless of the shaking of the grinding container (20).

[0122] Since other details are identical or similar to the first embodiment, a detailed explanation thereof is omitted.

[0123]

[0124] Third embodiment

[0125] The third embodiment is a case where the third sensor (63) is mounted on the crushing container (20), as shown in FIG. 3.

[0126] At this time, a first ground (66) is installed on the upper part of the main body (10), and a second ground (67) is installed on the lower part of the crushing container (20).

[0127] When the above-mentioned grinding container (20) is attached to the upper part of the main body (10), the first ground (66) and the second ground (67) are connected to supply electricity to the third sensor (63) mounted on the grinding container (20).

[0128] Since the above-mentioned grinding container (20) must be cleaned after use, the above-mentioned third sensor (63) is sealed to prevent water from entering.

[0129] The chimney part (40) can be made on the handle.

[0130] Other details are identical or similar to the first or second embodiment, so a detailed explanation thereof is omitted.

[0131]

[0132] Fourth embodiment

[0133] The fourth embodiment is a case where the connecting part (40) is mounted on the handle of the crushing container (20), as shown in FIG. 4.

[0134] At this time, the above backflow detection sensor consists of a first sensor (61) that detects fine particles moving through the above communication part (40).

[0135] And, a first ground (66) is mounted on the upper part of the main body (10), and a second ground (67) is mounted on the lower part of the crushing container (20).

[0136] When the above-mentioned crushing container (20) is attached to the upper part of the main body (10), the first ground (66) and the second ground (67) are connected to supply electricity to the first sensor (61).

[0137] Other details are identical or similar to the first or second embodiment, so a detailed explanation thereof is omitted.

[0138]

[0139] The vacuum blender of the present invention is not limited to the aforementioned embodiments and can be implemented with various modifications within the scope permitted by the technical concept of the present invention.

[0140] Since the present invention can be applied to a vacuum blender, it has industrial applicability.

Claims

1. Regarding vacuum blenders, A main body equipped with a motor; vacuum pump and; A grinding container coupled to the above-mentioned main body and having a mixing space formed therein for accommodating food; A container cover coupled to the upper part of the grinding container, covering the upper part of the mixing space, and having a first discharge hole formed through it; A connecting part that mutually connects the first discharge hole of the container cover and the vacuum pump; A backflow detection sensor that detects that fine material in the grinding container moves back to the vacuum pump through the first discharge hole of the container cover by the suction force of the vacuum pump; A vacuum blender characterized by comprising: a control unit that controls the vacuum blender to block fine water from flowing back into the vacuum pump according to the detection result of the backflow detection sensor.

2. In Claim 1, The above control unit controls the vacuum pump according to the detection result of the above backflow detection sensor, A vacuum blender characterized in that, while the vacuum pump is in operation, if the backflow detection sensor detects backflow of fine matter, the control unit stops the operation of the vacuum pump.

3. In Claim 1, It is made by further including a solenoid valve, and The above control unit controls the solenoid valve according to the detection result of the backflow detection sensor, A vacuum blender characterized in that, when the backflow detection sensor detects backflow of fine matter while the vacuum pump is operating, the control unit controls the solenoid valve to block the movement of air moving to the vacuum pump through the connecting part.

4. In Claim 1, It is made by further including a solenoid valve, and The above control unit controls the solenoid valve according to the detection result of the backflow detection sensor, A vacuum blender characterized in that, when the above vacuum pump is in operation and the above backflow detection sensor detects backflow of fine matter, the control unit controls the solenoid valve to release the vacuum pressure of the above connecting part or grinding container.

5. In Claim 1, A vacuum blender characterized in that when the backflow detection sensor detects backflow of fine matter while the vacuum pump is operating, the control unit switches the direction of air movement through the connecting part to a place other than the vacuum pump.

6. In Claim 1, The above-mentioned connecting part is formed to include a hollow passage, A vacuum blender characterized in that the above-mentioned backflow detection sensor is composed of a first sensor that detects fine particles flowing back through the above-mentioned hollow passage.

7. In Claim 2, The invention further comprises a foreign matter receiving member that is detachably coupled to the above-mentioned container cover or connecting part, and has a receiving portion formed therein that receives fine particles generated during the grinding of food by flowing back due to the suction force resulting from the operation of the vacuum pump; The above backflow detection sensor is composed of a second sensor that detects the water level of fine matter contained in the above foreign matter receiving member, and A vacuum blender characterized by the above-described control unit stopping the operation of the vacuum pump when the water level of fine particles detected by the second sensor exceeds a preset height.

8. In Claim 7, A hollow projection is formed protruding upwardly in the above foreign matter receiving member, and A vacuum blender characterized in that the second sensor detects the level of fine matter at a position lower than the top of the hollow protrusion.

9. In claim 8, A barrier wall is formed protruding downward from the top on the inner side of the above foreign matter receiving member, The bottom of the above barrier wall is lower than the top of the above hollow protrusion, and The above barrier wall is positioned between the above hollow protrusion and the second sensor, and A vacuum blender characterized in that the second sensor is positioned higher than the bottom of the barrier wall.

10. In Claim 1, A vacuum blender characterized in that the above-mentioned connecting part is mounted on or connected to the grinding container, container cover, or handle of the grinding container.

11. In Claim 1, A vacuum blender characterized by further including a notification unit that notifies the outside when fine particles are detected by the above-mentioned backflow detection sensor.

12. In Claim 2, It further comprises a third sensor for measuring the liquid level of the food contained in the grinding container; A vacuum blender characterized by the above-described control unit preventing the operation of the vacuum pump when the liquid level of the grinding container measured by the third sensor exceeds a preset level.

13. In Claim 12, The above third sensor is mounted on the above communication part, and An elastic member is mounted on the above-mentioned connecting part to elastically support the third sensor in the direction of the grinding container, A vacuum blender characterized by the third sensor measuring the liquid level of the grinding container while in close contact with the outer surface of the grinding container by means of the elastic member.

14. In Claim 12, The above third sensor is mounted on the grinding container, and A first ground is installed on the upper part of the main body, and a second ground is installed on the lower part of the grinding container. A vacuum blender characterized by the fact that when the grinding container is coupled to the upper part of the main body, the first ground and the second ground are connected to supply electricity to the third sensor.

15. In Claim 1, The above connecting part is mounted on the grinding container or the handle of the grinding container, and The above backflow detection sensor is composed of a first sensor that detects fine particles moving through the above-mentioned connecting part, A first ground is installed on the upper part of the main body, and a second ground is installed on the lower part of the grinding container. A vacuum blender characterized by the fact that when the grinding container is coupled to the upper part of the main body, the first ground and the second ground are connected to supply electricity to the first sensor.

16. A main body equipped with a motor and a vacuum pump; A grinding container coupled to the above-mentioned main body and having a mixing space formed therein for accommodating food; A container cover coupled to the upper part of the grinding container, covering the upper part of the mixing space, and having a first discharge hole formed through it; A connecting part that mutually connects the first discharge hole of the container cover and the vacuum pump; A third sensor for measuring the liquid level of the food contained in the above-mentioned grinding container; A control unit that controls the vacuum pump according to the detection result of the third sensor; It comprises a notification unit that notifies the detection result of the third sensor to the outside; A vacuum blender characterized by the fact that, before the motor and vacuum pump operate, if the liquid level of the grinding container measured by the third sensor exceeds a preset level, the control unit notifies the outside through the notification unit and prevents the operation of the vacuum pump.

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