Liquid seasoning feeding system and automatic cooking machine

Abstract

The present invention is applicable to the field of automatic cooking, and provides a liquid seasoning feeding system and an automatic cooking machine, the liquid seasoning feeding system comprising: a base; a measuring cylinder mounted on the base, one end of the measuring cylinder is provided with a discharge port, and the other end is provided with a first feed port; a first one-way valve provided at the first feed port; a piston provided in the measuring cylinder, and a second feed port is provided on the piston; a second one-way valve provided at the second feed port; and a linear motion mechanism for driving the piston to perform linear reciprocating motion. The embodiment of the present invention is provided with a measuring cylinder, and the volume of the measuring cylinder is used for measurement, which will not be affected by the viscosity of the liquid seasoning, thereby realizing the accurate measurement of the liquid seasoning, and then the liquid seasoning in the measuring cylinder is squeezed out by the piston and the linear motion mechanism, thereby realizing the addition of the liquid seasoning, thereby realizing the accurate addition of the liquid seasoning.

Description

Technical Field

[0001] The invention belongs to the field of automatic cooking, and in particular relates to a liquid seasoning feeding system and an automatic cooking machine. Background Art

[0002] The automatic cooking machine is a microcomputer-controlled intelligent cooking device with multiple functions such as automatic frying, sautéing, and stewing. It is convenient and simple to operate, allowing users to stay away from the hazards of kitchen fumes and easily enjoy delicious food, thus making the cooking process automated and interesting.

[0003] In the process of automatic cooking machine, various seasonings need to be added to make the food delicious. When adding seasonings, the amount of addition needs to be accurately controlled. Seasonings are divided into powdered seasonings and liquid seasonings, and the methods of achieving accurate control when adding various seasonings are different.

[0004] In order to achieve accurate addition of liquid seasoning, the prior art uses a metering pump, and controls the amount of liquid seasoning added by controlling the working time of the metering pump, thereby achieving accurate addition of liquid seasoning. However, there are many kinds of liquid seasonings, and the viscosity is inconsistent. When liquid seasonings of different viscosities pass through the metering pump, the flow rate is different, resulting in different total amounts of liquid seasonings of different viscosities passing through the metering pump in the same time. Therefore, controlling the amount of liquid seasoning added by controlling the working time of the metering pump still cannot achieve accurate addition of liquid seasoning. Summary of the invention

[0005] The embodiment of the present invention provides a liquid seasoning feeding system, which can realize the precise addition of liquid seasoning.

[0006] The embodiment of the present invention is implemented as follows: a liquid seasoning feeding system, comprising:

[0007] Pedestal;

[0008] A measuring cylinder mounted on the base, wherein one end of the measuring cylinder is provided with a discharge port and the other end is provided with a first feed port;

[0009] A first one-way valve disposed at the first feed port;

[0010] A piston disposed in the measuring cylinder, wherein the piston is provided with a second feed port;

[0011] A second one-way valve disposed at the second feed port;

[0012] A linear motion mechanism drives the piston to perform linear reciprocating motion.

[0013] Furthermore, the first feed port is arranged on the end wall of the measuring cylinder, the end wall is also provided with a first through hole, and the first one-way valve comprises:

[0014] a first connecting rod passing through the first through hole;

[0015] A first anti-slip body provided at one end of the first connecting rod, the first anti-slip body being located outside the end wall;

[0016] A first valve is arranged at the other end of the first connecting rod, wherein the first valve is located on the inner side of the end wall and can cover the first feed inlet.

[0017] Furthermore, a feed pipe connected to both the first feed port and the first through hole is also provided on the outer side of the end wall, and the first anti-slip body is located in the feed pipe.

[0018] Furthermore, the piston is further provided with a second through hole, and the second one-way valve comprises:

[0019] a second connecting rod passing through the second through hole;

[0020] A second anti-slip body provided at one end of the second connecting rod;

[0021] A second valve is arranged at the other end of the second connecting rod, wherein the second valve is located on a side of the piston close to the discharge port and can cover the second feed port.

[0022] Furthermore, a first sealing ring is provided on the peripheral side of the piston.

[0023] Furthermore, the linear motion mechanism comprises:

[0024] An internal gear fixedly mounted on the base;

[0025] an external gear meshing with the internal gear, wherein the external gear is provided with an axial hole and a first shaft, and the axial hole is located at the center of the external gear;

[0026] A rotating motor mounted on the base, wherein the output shaft of the rotating motor is located at the center of the internal gear and is symmetrically arranged with the first shaft with the shaft hole as the center;

[0027] A transmission rod having one end fixedly connected to the output shaft of the rotating motor, and a second shaft rotatably connected to the shaft hole is provided at the other end of the transmission rod;

[0028] A piston rod having one end fixedly connected to the piston and the other end rotatably connected to the first shaft.

[0029] Furthermore, the measuring cylinder is provided with a third through hole for the piston rod to pass through, and a second sealing ring is provided at the third through hole.

[0030] Furthermore, the linear motion mechanism includes: a linear motor installed on the base and driving the piston to perform linear reciprocating motion.

[0031] Furthermore, the discharge port is arranged at the top of the measuring cylinder, or a switch is arranged at the discharge port.

[0032] An embodiment of the present invention further provides an automatic cooking machine, comprising a frame, a discharge pipe, a pot arranged on the frame and the above-mentioned liquid seasoning feeding system, wherein one end of the discharge pipe is connected to the discharge port, and the other end is arranged above the pot.

[0033] The embodiment of the present invention is provided with a measuring cylinder, and measurement is performed through the volume of the measuring cylinder, which will not be affected by the viscosity of the liquid seasoning, thereby achieving accurate measurement of the liquid seasoning. The liquid seasoning in the measuring cylinder is then squeezed out through the piston and the linear motion mechanism, thereby achieving the addition of the liquid seasoning, thereby achieving accurate addition of the liquid seasoning. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a three-dimensional structural diagram provided by an embodiment of the present invention;

[0035] Figure 2 is an exploded structural diagram provided by an embodiment of the present invention;

[0036] Figure 3 is a cross-sectional structural diagram provided by an embodiment of the present invention;

[0037] Figure 4 yes Figure 3 The middle A part is placed in the schematic diagram;

[0038] Figure 5 yes Figure 3 The middle B part is placed in the schematic diagram;

[0039] Figure 6 is a three-dimensional structural diagram of a linear motion mechanism provided by an embodiment of the present invention;

[0040] Figure 7 It is a schematic diagram of a linear motion mechanism provided in an embodiment of the present invention driving a piston to move.

[0041] In the figure, 1. base; 11. accommodating chamber; 2. measuring cylinder; 21. discharge port; 22. first feed port; 23. first through hole; 24. third through hole; 25. feed pipe; 3. first one-way valve; 31. first connecting rod; 32. first anti-slip body; 33. first valve; 4. piston; 41. second feed port; 42. second through hole; 5. second one-way valve; 51. second connecting rod; 52. second anti-slip body; 53. second valve; 6. linear motion mechanism; 61. internal gear; 62. external gear; 621. shaft hole; 622. first shaft; 63. rotating motor; 631. output shaft; 64. transmission rod; 641. second shaft; 65. piston rod; 7. cavity cover; 71. linear groove. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] The embodiment of the present invention is provided with a measuring cylinder, a piston and a linear motion mechanism. The measurement is performed by the volume of the measuring cylinder, which will not be affected by the viscosity of the liquid seasoning, thereby realizing the accurate measurement of the liquid seasoning. Then, the liquid seasoning in the measuring cylinder is squeezed out by the piston and the linear motion mechanism, thereby realizing the addition of the liquid seasoning, thereby realizing the accurate addition of the liquid seasoning.

[0044] Embodiment 1

[0045] like Figure 1-Figure 5 As shown, an embodiment of the present invention provides a liquid seasoning feeding system, comprising:

[0046] Base 1;

[0047] A measuring cylinder 2 mounted on the base 1, wherein one end of the measuring cylinder 2 is provided with a discharge port 21, and the other end of the measuring cylinder 2 is provided with a first feed port 22;

[0048] A first one-way valve 3 provided at the first feed port 22;

[0049] A piston 4 is disposed in the measuring cylinder 2, and a second feed port 41 is disposed on the piston 4;

[0050] A second one-way valve 5 provided at the second feed port 41;

[0051] A linear motion mechanism 6 drives the piston 4 to perform linear reciprocating motion.

[0052] Furthermore, the discharge port 21 is arranged at the top of the measuring cylinder 2, or a switch is arranged at the discharge port 21. The discharge port 21 is arranged at the top of the measuring cylinder 2, that is, the measuring cylinder 2 is placed upright. Through the above arrangement, it is possible to prevent the liquid seasoning from flowing out of the discharge port 21 when the measuring cylinder 2 is not filled, resulting in failure to achieve accurate measurement.

[0053] Furthermore, a first sealing ring (not shown) is provided on the peripheral side of the piston 4. A first ring groove (not shown) can be provided on the peripheral side of the piston 4, and the first sealing ring is installed in the first ring groove. By providing the first sealing ring, a seal is achieved between the piston 4 and the inner wall of the measuring cylinder 2. Of course, the seal can also be achieved by the precise size matching between the piston 4 and the inner wall of the measuring cylinder 2.

[0054] Specifically, the first feed port 22 is arranged on the end wall of the measuring cylinder 2, and the end wall is also provided with a first through hole 23, and the first one-way valve 3 includes:

[0055] A first connecting rod 31 passing through the first through hole 23;

[0056] A first anti-slip body 32 provided at one end of the first connecting rod 31, wherein the first anti-slip body 32 is located outside the end wall;

[0057] A first valve 33 is disposed at the other end of the first connecting rod 31 . The first valve 33 is located inside the end wall and can cover the first feed port 22 .

[0058] The end wall of the measuring cylinder 2 is detachable from the measuring cylinder 2 body. For example, one end of the measuring cylinder 2 body is open, and an end cover is provided at the opening, and the end cover constitutes the end wall of the measuring cylinder 2. The end wall of the measuring cylinder 2 is detachable from the measuring cylinder 2 body, which is convenient for installing the piston 4 in the measuring cylinder 2 body, and is also convenient for removing the piston 4 for cleaning, maintenance, replacement of the first sealing ring, etc.

[0059] The first connecting rod 31 can move in the first through hole 23. When the first valve 33 is in close contact with the inner side of the end wall, the first feed inlet 22 can be sealed and closed. When the first valve 33 is away from the inner side of the end wall, the first feed inlet 22 can be opened.

[0060] Furthermore, a feed pipe 25 connected to both the first feed port 22 and the first through hole 23 is further provided on the outer side of the end wall, and the first anti-slip body 32 is located in the feed pipe 25. Both the first feed port 22 and the first through hole 23 are connected to the feed pipe 25, which can prevent the liquid seasoning from flowing out of the first through hole 23 to the outside of the measuring cylinder 2. Of course, a sealing structure can also be provided at the first through hole 23 to prevent the liquid seasoning from flowing out of the measuring cylinder 2.

[0061] The piston 4 is also provided with a second through hole 42, and the second one-way valve 5 includes:

[0062] A second connecting rod 51 passing through the second through hole 42;

[0063] A second anti-fall-off body 52 disposed at one end of the second connecting rod 51;

[0064] A second valve 53 is provided at the other end of the second connecting rod 51 . The second valve 53 is located on a side of the piston 4 close to the discharge port 21 and can cover the second feed port 41 .

[0065] The second connecting rod 51 can move in the second through hole 42. When the second valve 53 is in close contact with the side wall of the piston 4, the second feed port 41 can be sealed and closed. When the second valve 53 is away from the side wall of the piston 4, the second feed port 41 can be opened.

[0066] The first one-way valve 3 and the second one-way valve 5 can be made of soft rubber materials such as silicone rubber and are circular or spherical in shape.

[0067] Of course, the first one-way valve 3 and the second one-way valve 5 may also be electric one-way valves.

[0068] The measuring cylinder 2 can be made of a transparent material (such as quartz glass, PC, etc.) or an opaque material (such as SUS304, SUS316 stainless steel, etc.).

[0069] For the convenience of explanation, in all embodiments of the present invention, the end of the measuring cylinder 2 provided with the first feed port 22 is defined as the bottom end, and the end of the measuring cylinder 2 provided with the discharge port 21 is defined as the top end.

[0070] In the embodiment of the present invention, the feeding process is as follows:

[0071] In the first step, the measuring cylinder 2 is filled. Under the drive of the linear motion mechanism 6, the piston 4 moves from the bottom end to the top end in the measuring cylinder 2, and a negative pressure chamber is formed between the piston 4 and the bottom end of the measuring cylinder 2. Under the action of the negative pressure, the second valve 53 is in close contact with the side wall of the piston 4, closing the second feed port 41, and the first valve 33 moves away from the inner side of the end wall into the negative pressure chamber, opening the first feed port 22, and the liquid seasoning enters the negative pressure chamber. When the piston 4 moves to the top end of the measuring cylinder 2, the liquid seasoning fills the measuring cylinder 2, and the filling of the measuring cylinder 2 is completed;

[0072] In the second step, the piston 4 returns to its original position. Driven by the linear motion mechanism 6, the piston 4 moves from the top to the bottom in the measuring cylinder 2. The water pressure between the piston 4 and the bottom of the measuring cylinder 2 increases. Under the action of the water pressure, the first valve 33 is tightly attached to the inner side of the end wall, closing the first feed port 22. The second valve 53 is separated from the side wall of the piston 4, opening the second feed port 41. The liquid seasoning enters the side near the top of the measuring cylinder 2 from the side near the bottom of the measuring cylinder 2 of the piston 4. At the same time, the piston 4 gradually moves to the bottom of the measuring cylinder 2, completing the return of the piston 4.

[0073] The third step is feeding. Driven by the linear motion mechanism 6, the piston 4 moves from the bottom to the top in the measuring cylinder 2, and a negative pressure chamber is formed between the piston 4 and the bottom of the measuring cylinder 2. Under the action of negative pressure, the second valve 53 is in close contact with the side wall of the piston 4, closing the second feed port 41. The liquid seasoning located on the side of the piston 4 close to the top of the measuring cylinder 2 flows out from the discharge port 21 under the push of the piston 4 and enters the pot of the automatic cooking machine. When the piston 4 moves to the top of the measuring cylinder 2, one feeding is completed. At the same time, under the action of negative pressure, the first valve 33 moves away from the inner side of the end wall into the negative pressure chamber, opens the first feed port 22, and the liquid seasoning enters the negative pressure chamber. When the piston 4 moves to the top of the measuring cylinder 2, the liquid seasoning fills the measuring cylinder 2, completing the filling of the measuring cylinder 2.

[0074] Therefore, the feeding process is also the filling process of the measuring cylinder 2, and the feeding and the filling of the measuring cylinder 2 are completed simultaneously. The piston 4 moves from the bottom end to the top end and then returns to the bottom end in the measuring cylinder 2 as a full stroke.

[0075] The metering of the present invention is achieved through the volume of the measuring cylinder 2, and the metering control can be performed according to N times of the full stroke of the piston 4 in the measuring cylinder 2. For example, a full stroke is 1 ml, and when 5 ml of liquid seasoning needs to be added, the piston 4 moves 5 full strokes. Of course, the addition of a smaller amount can also be achieved by using the piston 4 in a partial stroke of the measuring cylinder 2.

[0076] The total amount of a full stroke is determined by the diameter of the measuring cylinder 2, and measuring cylinders 2 of different diameters can be selected according to different adding requirements. For example, if the amount of oil and water is large, a measuring cylinder 2 with a larger diameter can be used, and if vinegar, sesame oil, chili oil, etc., a measuring cylinder 2 with a smaller diameter can be used.

[0077] Of course, metering control can also be performed according to the specific stroke of the piston 4 in the measuring cylinder 2.

[0078] In the present invention, the total amount of liquid seasoning added is controlled by the volume of the measuring cylinder 2 and the moving distance of the piston 4, and has nothing to do with the viscosity of the liquid seasoning or the type of the liquid seasoning.

[0079] The embodiment of the present invention is provided with a measuring cylinder 2, and the volume of the measuring cylinder 2 is used for measurement, which will not be affected by the viscosity of the liquid seasoning, thereby realizing accurate measurement of the liquid seasoning. Then, the liquid seasoning in the measuring cylinder 2 is squeezed out through the piston 4 and the linear motion mechanism 6, thereby realizing the addition of the liquid seasoning, thereby realizing accurate addition of the liquid seasoning.

[0080] Embodiment 2

[0081] like Figure 6 , Figure 7 As shown, in an optional embodiment of the present invention, the linear motion mechanism 6 includes:

[0082] An internal gear 61 fixedly mounted on the base 1;

[0083] an outer gear 62 meshing with the inner gear 61, wherein the outer gear 62 is provided with an axial hole 621 and a first shaft 622, and the axial hole 621 is located at the center of the outer gear 62;

[0084] A rotating motor 63 mounted on the base 1, wherein an output shaft 631 of the rotating motor 63 is located at the center of the internal gear 61 and is symmetrically arranged with the first shaft 622 with the shaft hole 621 as the center;

[0085] One end of the transmission rod 64 is fixedly connected to the output shaft 631 of the rotating motor 63, and the other end of the transmission rod 64 is provided with a second shaft 641 rotatably connected to the shaft hole 621;

[0086] A piston rod 65 has one end fixedly connected to the piston 4 and the other end rotatably connected to the first shaft 622 .

[0087] The inner gear 61 is annular, the outer gear 62 is circular, and the inner gear 61 meshes with the outer gear 62. Assuming that the base circle radius of the inner gear 61 is R, the base circle radius of the outer gear 62 is r, and the distance between the shaft hole 621 and the first shaft 622 is a, when R=r+a, the first shaft 622 can move linearly along the axis direction of the piston rod 65, and when R and r remain unchanged, the closer a is to r, the greater the distance the first shaft 622 moves, that is, the closer the position of the first shaft 622 is to the edge of the outer gear 62, the greater the distance the first shaft 622 moves, and the greater the distance the piston rod 65 moves from the piston 4.

[0088] The present invention fixes the shaft hole 621 and the first shaft 622 on the external gear 62. Of course, the first shaft 622 can also be fixedly connected to the piston rod 65, and then the first shaft 622 is rotatably connected to the external gear 62. The second shaft 641 is fixed at the center of the external gear 62 and is rotatably connected to the transmission rod 64, which has the same effect as the present invention.

[0089] Furthermore, the base 1 is provided with an accommodating chamber 11 with an open end, the inner gear 61, the outer gear 62, the shaft hole 621 and the transmission rod 64 are all arranged in the accommodating chamber 11, and the output shaft 631 of the rotary motor 63 extends into the accommodating chamber 11. The opening of the accommodating chamber 11 is covered with a chamber cover 7, and a linear groove 71 is provided on the chamber cover 7. The first shaft 622 passes through the linear groove 71 and is connected to the piston rod 65, and the first shaft 622 can move in the linear groove 71.

[0090] Furthermore, the measuring cylinder 2 is provided with a third through hole 24 for the piston rod 65 to pass through, and a second sealing ring (not shown in the figure) is provided at the third through hole 24. The second sealing ring is provided to prevent the liquid seasoning from flowing out of the third through hole 24 along the piston rod 65.

[0091] In the embodiment of the present invention, the inner gear 61 is equivalent to the track. Under the drive of the rotary motor 63, the outer gear 62 rotates and moves one circle along the track of the inner gear 61. The first shaft 622 moves from the farthest position from the measuring cylinder 2 to the farthest position from the measuring cylinder 2, and then returns to the farthest position from the measuring cylinder 2. The piston 4 completes a reciprocating motion. The rotary motor 63 always rotates in one direction, and the reciprocating motion of the piston 4 can be realized without changing the direction. Compared with the linear motor, the rotary motor 63 in the embodiment of the present invention does not need to rotate forward or reverse, does not need a position sensor for endpoint positioning, and will not overshoot.

[0092] The embodiment of the present invention converts the rotational motion of the output shaft 631 of the rotary motor 63 into the linear motion of the piston rod 65 by setting the internal gear 61 and the external gear 62, thereby driving the piston 4 to move back and forth, thereby realizing the metering and feeding of materials. The structure is simple, and there is no need to change the rotation direction of the rotary motor 63, so the control is convenient.

[0093] In another equivalent optional embodiment of the present invention, the linear motion mechanism 6 comprises:

[0094] An internal gear 61 mounted on the base 1;

[0095] an outer gear 62 meshing with the inner gear 61, wherein a first shaft 622 is disposed on the outer gear 62;

[0096] A rotating motor 63 mounted on the base 1, the rotating motor 63 drives the internal gear 61 to rotate, and the first shaft 622 and the rotation center of the internal gear 61 are symmetrically arranged with the center of the circle of the external gear 62 as the center;

[0097] A piston rod 65 having one end fixedly connected to the piston 4 and the other end rotatably connected to the first shaft 622;

[0098] A cavity cover 7 is disposed on the accommodating cavity 11 of the base 1 , and a linear groove 71 is disposed on the cavity cover 7 for the first shaft 622 to slide.

[0099] The inner gear 61 rotates under the drive of the rotary motor 63, driving the meshing outer gear 62 to rotate and move along the track of the inner gear 61. The first shaft 622 moves from the position farthest from the measuring cylinder 2 along the linear groove 71 to the position farthest from the measuring cylinder 2, and then returns to the position farthest from the measuring cylinder 2 along the linear groove 71. The piston 4 completes a reciprocating motion, thereby completing a filling metering and feeding. The structure is simple, and there is no need to change the rotation direction of the rotary motor 63, and the control is convenient.

[0100] Embodiment 3

[0101] In another optional embodiment of the present invention, the linear motion mechanism 6 includes a linear motor installed on the base 1 to drive the piston 4 to perform linear reciprocating motion. In the embodiment of the present invention, the output shaft 631 of the linear motor is fixedly connected to the piston 4 or the piston rod 65. When the output shaft 631 of the linear motor performs linear reciprocating motion, it drives the piston 4 to perform linear reciprocating motion, thereby achieving material metering and feeding. The structure has low cost.

[0102] Embodiment 4

[0103] An embodiment of the present invention further provides an automatic cooking machine, comprising a frame, a discharge pipe, a pot arranged on the frame and the above-mentioned liquid seasoning feeding system, wherein one end of the discharge pipe is connected to the discharge port 21, and the other end is arranged above the pot.

[0104] The first axis 622 moves from the position farthest from the measuring cylinder 2 to the position farthest from the measuring cylinder 2, and the piston 4 moves from the end of the measuring cylinder 2 close to the first feed port 22 to the end of the measuring cylinder 2 close to the discharge port 21, squeezing out the material in the measuring cylinder 2 and dropping it into the pot through the discharge pipe, thus completing the addition of liquid seasoning. The piston 4 of the liquid seasoning feeding system moves back and forth as many times as the liquid seasoning in the measuring cylinder 2 needs to be added.

[0105] The embodiment of the present invention is provided with a measuring cylinder, and the volume of the measuring cylinder is used for measurement, which will not be affected by the viscosity of the liquid seasoning, and the liquid seasoning is accurately measured. Then, the liquid seasoning in the measuring cylinder is squeezed out through the piston and the linear motion mechanism, and the liquid seasoning is added, thereby achieving accurate addition of the liquid seasoning. The embodiment of the present invention converts the rotational motion of the output shaft of the rotary motor into the linear motion of the piston rod by providing an internal gear and an external gear, and drives the piston to move back and forth, so as to achieve charging measurement and feeding. The structure is simple, and there is no need to change the rotation direction of the rotary motor, and the control is convenient.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid seasoning feeding system, It is characterized in that include: Pedestal; A measuring cylinder mounted on the base, wherein one end of the measuring cylinder is provided with a discharge port and the other end is provided with a first feed port; A first one-way valve disposed at the first feed port; A piston disposed in the measuring cylinder, wherein the piston is provided with a second feed port; A second one-way valve disposed at the second feed port; A linear motion mechanism driving the piston to perform linear reciprocating motion; When the liquid seasoning feeding system is feeding: Filling the measuring cylinder: the linear motion mechanism drives the piston to move from the bottom to the top in the measuring cylinder, the second one-way valve closes the second feed port, the first one-way valve opens the first feed port, and the liquid seasoning enters the measuring cylinder. When the piston moves to the top of the measuring cylinder, the liquid seasoning fills the measuring cylinder and the filling is completed; The piston returns: the linear motion mechanism drives the piston to move from the top to the bottom in the measuring cylinder, the first one-way valve closes the first feed port, the second one-way valve opens the second feed port, and the liquid seasoning enters the side close to the top of the measuring cylinder from the side of the piston close to the bottom of the measuring cylinder, and the piston gradually moves to the bottom of the measuring cylinder to complete the return; Feeding: the linear motion mechanism drives the piston to move from the bottom to the top in the measuring cylinder, the second one-way valve closes the second feed port, and the liquid seasoning located on the side of the piston close to the top of the measuring cylinder flows out from the discharge port under the push of the piston. When the piston moves to the top of the measuring cylinder, one feeding is completed; at the same time, the first one-way valve opens the first feed port, and the liquid seasoning enters the measuring cylinder. When the piston moves to the top of the measuring cylinder, the liquid seasoning fills the measuring cylinder to complete the filling.

2. The liquid seasoning feeding system according to claim 1, It is characterized in that The first feed port is arranged on the end wall of the measuring cylinder, and the end wall is also provided with a first through hole, and the first one-way valve comprises: a first connecting rod passing through the first through hole; A first anti-slip body provided at one end of the first connecting rod, the first anti-slip body being located outside the end wall; A first valve is arranged at the other end of the first connecting rod, wherein the first valve is located on the inner side of the end wall and can cover the first feed inlet.

3. The liquid seasoning feeding system according to claim 2, It is characterized in that A feed pipe connected to both the first feed port and the first through hole is also disposed on the outer side of the end wall, and the first anti-slip body is located inside the feed pipe.

4. The liquid seasoning feeding system according to claim 1, It is characterized in that The piston is also provided with a second through hole, and the second one-way valve comprises: a second connecting rod passing through the second through hole; A second anti-slip body provided at one end of the second connecting rod; A second valve is arranged at the other end of the second connecting rod, wherein the second valve is located on a side of the piston close to the discharge port and can cover the second feed port.

5. The liquid seasoning feeding system according to claim 1, It is characterized in that A first sealing ring is arranged on the peripheral side of the piston.

6. The liquid seasoning feeding system according to any one of claims 1 to 5, It is characterized in that The linear motion mechanism comprises: An internal gear fixedly mounted on the base; an external gear meshing with the internal gear, wherein the external gear is provided with an axial hole and a first shaft, and the axial hole is located at the center of the external gear; A rotating motor mounted on the base, wherein the output shaft of the rotating motor is located at the center of the internal gear and is symmetrically arranged with the first shaft with the shaft hole as the center; A transmission rod having one end fixedly connected to the output shaft of the rotating motor, and a second shaft rotatably connected to the shaft hole is provided at the other end of the transmission rod; A piston rod having one end fixedly connected to the piston and the other end rotatably connected to the first shaft.

7. The liquid seasoning feeding system according to claim 6, It is characterized in that The measuring cylinder is provided with a third through hole for the piston rod to pass through, and a second sealing ring is provided at the third through hole.

8. The liquid seasoning feeding system according to any one of claims 1 to 5, It is characterized in that The linear motion mechanism comprises a linear motor installed on the base and driving the piston to perform linear reciprocating motion.

9. The liquid seasoning feeding system according to claim 1, It is characterized in that The discharge port is arranged at the top of the measuring cylinder, or a switch is arranged at the discharge port.

10. An automatic cooking machine, It is characterized in that It comprises a frame, a discharge pipe, a cookware arranged on the frame and a liquid seasoning feeding system as described in any one of claims 1 to 9, wherein one end of the discharge pipe is connected to the discharge port, and the other end is arranged above the cookware.

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