Saline water injection machine for meat processing

Abstract

The invention relates to the technical field of saline injection machines, and provides a saline injection machine for meat processing, a machine body is provided with a transmission space and a liquid inlet space which are arranged at an interval up and down and are isolated from each other; the injection needle is rotationally installed on the machine body and provided with a transmission tooth part and an injection runner, the transmission tooth part is located in the transmission space and used for being driven by the driving device and driving the injection needle to rotate, and a liquid inlet hole is formed in the side wall of the injection runner and located in the liquid inlet space; a heat dissipation part of the injection needle is located between a transmission tooth part and a liquid inlet hole and used for dissipating heat transmitted from the transmission tooth part to the liquid inlet hole, the total outer surface area of the heat dissipation part is larger than the side area of a cylinder with the same size, and a heat dissipation plate part synchronously rotates around the axis of the injection needle. The heat dissipation plate part drives air in the area to form directional flow along the rotating track of the heat dissipation plate part, the convection heat dissipation effect is enhanced, heat transmitted downwards from the heat dissipation part to the liquid inlet hole area is reduced, and the activity and stability of functional components in the injection are guaranteed.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of brine injector technology, specifically to a brine injector for meat processing. Background Technology

[0002] In the meat processing industry, brine injection is a process that involves injecting a brine solution containing functional ingredients, such as curing agents, water-retaining agents, flavoring agents, and tenderizing enzymes, into the meat tissue under high pressure. This process can improve the tenderness, water retention, and flavor stability of the meat, while also increasing the yield of subsequent processing and meeting the market's demand for standardized meat products.

[0003] The injection solutions currently used in the industry are not simply saline solutions, but rather multifunctional liquids customized to meet specific process requirements. For example, in terms of water retention, the main components are soy protein and whey protein. These proteins are dispersed in the injection solution and, after being injected into the meat, can form a three-dimensional gel network to encapsulate the water in the meat, preventing moisture loss during cooking. In terms of tenderizing activity, components such as papain and bromelain, plant-derived enzymes, gently break down the collagen in the connective tissue of the meat, reducing the firmness of the meat fibers and making them more suitable for meats with high fascia content. The ingredients include high-quality beef and lamb. In terms of flavor and quality regulation, the components include spice extracts such as Sichuan pepper oil, allicin, phosphates, and compound seasonings. Volatile spice components are used to improve the flavor profile of meat products, while phosphates need to maintain a stable solubility to function. The injection also includes high-concentration particulate components, which are mainly used for processing meat products such as meat skewers and meatballs. 20% to 30% starch granules and 5% to 10% spice powder are often added to the injection solution to enhance the fullness and richness of the meat's flavor.

[0004] However, existing brine injectors have heat generation issues, which cause the temperature of the injected solution to rise, leading to negative changes such as protein denaturation, enzyme inactivation, loss of flavor substances, and particle aggregation, thus affecting meat quality and production efficiency. Summary of the Invention

[0005] To overcome the above-mentioned defects, the present invention provides a brine injector for meat processing, which solves the technical problem that existing brine injectors generate heat, leading to an increase in the temperature of the injected solution, which in turn causes negative changes such as protein denaturation, enzyme inactivation, loss of flavor substances, and particle agglomeration, affecting meat quality and production efficiency.

[0006] According to one aspect, at least one embodiment of the present invention provides a brine injector for meat processing, comprising: a body having a transmission space and a liquid inlet space arranged vertically at intervals, wherein a drive device is disposed within the transmission space; The injection needle is rotatably mounted on the machine body. The injection needle includes a needle base, a heat dissipation part, and a needle body connected sequentially from top to bottom. The needle base has a transmission gear that is connected to the drive device. The transmission gear is located in the transmission space. The transmission gear can drive the needle body to rotate under the action of the drive device. The needle body has an injection channel inside. The side wall of the injection channel is provided with a liquid inlet hole. The liquid inlet hole is located in the liquid inlet space and communicates with the liquid inlet space. The heat dissipation part is used to dissipate the heat transferred from the transmission gear part to the needle body part. The outer surface area of ​​the heat dissipation part is S. The area of ​​the lower end face of the needle seat part and the upper end face of the needle body part that are not in contact with the heat dissipation part is Z. The radius of the lower end face of the needle seat part and the upper end face of the needle body part is R. The height of the heat dissipation part is h, where S+Z>2πRh.

[0007] For example, in a brine injector for meat processing provided in at least one embodiment of the present invention, the heat dissipation part includes at least one cylindrical connecting part, the diameter of which is r, where r < R.

[0008] For example, in a brine injector for meat processing provided in at least one embodiment of the present invention, the heat dissipation part includes a cylindrical connecting part and a plurality of heat dissipation plate parts disposed on the outer periphery of the cylindrical connecting part. The heat dissipation plate parts are arranged at intervals along the circumference of the cylindrical connecting part and extend radially along the injection needle.

[0009] For example, in a brine injector for meat processing provided in at least one embodiment of the present invention, the heat dissipation part includes a plurality of parallel cylindrical connecting parts, and each cylindrical connecting part has a heat dissipation plate part on its outer wall, the heat dissipation plate part extending radially along the cylindrical connecting part.

[0010] For example, in a brine injector for meat processing provided in at least one embodiment of the present invention, the height of the cylindrical connecting part is greater than or equal to the height of the heat dissipation plate part.

[0011] For example, in a brine injector for meat processing provided in at least one embodiment of the present invention, the height of the cylindrical connecting part is equal to the height of the heat dissipation plate part, and the upper end face of the heat dissipation plate part is connected to the lower end face of the needle seat part, the lower end face of the heat dissipation plate part is connected to the upper end face of the needle body part, and the heat dissipation plate part extends radially along the injection needle.

[0012] For example, in a brine injector for meat processing provided in at least one embodiment of the present invention, the surface of the heat dissipation plate has a plurality of grooves or protrusions.

[0013] For example, in a brine injector for meat processing provided in at least one embodiment of the present invention, the machine body has a heat dissipation channel for accommodating a heat dissipation unit, and the heat dissipation channel is connected to the transmission space.

[0014] For example, in a meat processing brine injector provided in at least one embodiment of the present invention, the top of the machine body has a heat dissipation vent located above the transmission space, which is used to exhaust hot air from the transmission space.

[0015] For example, in a meat processing brine injector provided in at least one embodiment of the present invention, a plurality of injection needles are distributed in two rows, with a plurality of injection needles in each row arranged at intervals. The driving device includes a driving component and a chain, the chain being connected to a transmission tooth for driving the two rows of injection needles to rotate synchronously and in the same direction.

[0016] The beneficial effects of the embodiments of the present invention are as follows: In this invention, the outer surface area of ​​the heat dissipation part is S, and the area of ​​the lower end face of the needle seat and the upper end face of the needle body that are not in contact with the heat dissipation part is Z, where S+Z>2πRh, that is, larger than the side area of ​​a cylinder of the same size. When the heat generated by the upper transmission teeth is transferred downward to the heat dissipation part, the larger heat dissipation area can improve the heat dissipation efficiency. Furthermore, when the injection needle rotates with the chain, the heat dissipation plate in the middle rotates synchronously around the axis of the injection needle. The air in this area is driven by the heat dissipation plate to form a directional flow along the rotation trajectory of the heat dissipation plate, thereby accelerating the flow rate of the air around the heat dissipation part. This allows the heat on the surface of the heat dissipation part to be carried away by the flowing air more quickly, further enhancing the convective heat dissipation effect, thereby reducing the heat transferred downward from the heat dissipation part to the liquid inlet area, thus ensuring the activity and stability of functional components in the injection solution, such as proteins and enzymes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a brine injector for meat processing according to one embodiment of the present invention; Figure 2 for Figure 1 A partial structural diagram of the saline injection machine in the embodiment; Figure 3 for Figure 2 A magnified schematic diagram of the structure of part A in the diagram; Figure 4 for Figure 1 A top view of the saline injector in the embodiment (showing the drive device). Figure 5 for Figure 1 A top view of the saline injector in the embodiment; Figure 6 for Figure 5 A schematic diagram of a partial cross-sectional view of the CC structure; Figure 7 This is a schematic diagram of the structure of an injection needle in one embodiment of the present invention; Figure 8 for Figure 7 A magnified schematic diagram of the partial structure of B in the diagram; Figure 9 This is a schematic diagram of the heat dissipation unit in the second embodiment; Figure 10 This is a schematic diagram of the heat dissipation unit in the third embodiment; Figure 11 This is a schematic diagram of the heat dissipation unit in the fourth embodiment; Figure 12 This is a schematic diagram of the heat dissipation unit in the fifth embodiment.

[0019] In the diagram: 100, body; 110, transmission space; 120, liquid inlet space; 130, heat dissipation channel; 140, heat dissipation port; 200, injection needle; 210, needle seat; 211, transmission gear; 220, heat dissipation part; 221, cylindrical connecting part; 222, heat dissipation plate part; 223, groove; 230, needle body; 231, injection channel; 232, liquid inlet hole; 300, drive device; 310, drive component; 320, chain. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0021] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] like Figures 1-6 As shown, it illustrates a brine injector for meat processing according to an embodiment of the present invention. The machine body 100 is the main frame of the brine injector, as shown... Figure 6 As shown, the interior of the body 100 is vertically divided into an upper transmission space 110 and a lower liquid inlet space 120. The upper transmission space 110 is used to accommodate the drive device 300. In this embodiment, as shown... Figure 3 and Figure 4 As shown, the drive device 300 includes a drive component 310 and a chain 320. The chain 320 is connected to the transmission gear 211 to drive several injection needles 200 to rotate synchronously. The liquid inlet space 120 is used to store a compound injection solution containing components such as proteins, enzymes, and particles. The transmission space 110 and the liquid inlet space 120 are separated by a horizontal partition plate. The horizontal partition plate has a through hole at the position where the injection needles 200 pass through. A sealing kit is provided between the injection needles 200 and the horizontal partition plate to prevent liquid in the liquid inlet space 120 from entering the transmission space 110 and to prevent heat in the transmission space 110 from being directly conducted to the liquid inlet space 120.

[0027] like Figure 3 and Figure 4As shown, several injection needles 200 are divided into two parallel rows along the length of the body 100. The two rows of injection needles 200 are distributed in a parallel state. The adjacent injection needles 200 in each row are evenly spaced, and the axes of the two rows of injection needles 200 are staggered. That is, the axis of one row of injection needles 200 is located on one side of the axis of two adjacent injection needles 200 in the other row, so as to avoid injection blind spots and improve the injection coverage.

[0028] like Figure 6 and Figure 7 As shown, the injection needle 200 includes a needle seat portion 210, a heat dissipation portion 220, and a needle body portion 230 connected sequentially from top to bottom. The needle seat portion 210 has a transmission tooth portion 211, which is located in the transmission space 110 and is connected to the chain 320 for transmission. The tooth shape matches the pitch of the chain 320 to ensure stable meshing transmission. The needle body portion 230 is provided with an injection channel 231. The side wall of the injection channel 231 is provided with a liquid inlet hole 232, which is located in and communicates with the liquid inlet space 120. The liquid in the liquid inlet space 120 enters the injection channel 231 through the liquid inlet hole 232. As a possible embodiment, there are multiple liquid inlet holes 232, and the multiple liquid inlet holes 232 are arranged circumferentially along the side wall of the needle body portion 230. exist Figure 3 and Figure 8In the illustrated embodiment, the heat dissipation unit 220 includes four cylindrical connecting parts 221. The number of cylindrical connecting parts 221 can be three, five, or other, and is not limited here. The diameter of each cylindrical connecting part 221 is smaller than the diameter of the needle seat part 210 and the needle body part 230. Each cylindrical connecting part 221 is provided with a heat dissipation plate part 222, which extends radially along the cylindrical connecting part 221. It should be noted that, regardless of whether the multi-needle injection machine uses gear set drive or the chain 320 transmission method mentioned in this embodiment, some heat will inevitably be generated at the transmission tooth part 211. Taking the chain 320 transmission in this embodiment as an example, when the chain 320 drives the transmission tooth part 211, the chain 320 and the transmission tooth part 211 mesh and generate friction. In addition, when the chain 320 is tensioned, the two are in contact and squeezed. Coupled with the relative friction between metals during movement, heat will inevitably be generated. For example, in gear-driven systems, the different transmission paths of the two rows of injection needles 200 can lead to speed deviations. Some of the transmission teeth 211 of the injection needles 200 experience meshing friction, generating additional localized heat. In both of the aforementioned drive examples, this heat is transferred downwards to the needle body 230, further affecting the temperature of the liquid entering the injection channel 231 from the inlet hole 232, potentially causing protein denaturation, enzyme inactivation, and other problems. In this embodiment, the total outer surface area of ​​the heat dissipation unit 220 is larger than the side area of ​​a cylinder of the same size. When the heat generated by the upper transmission teeth 211 is transferred downwards to the heat dissipation unit 220, the larger heat dissipation area improves heat dissipation efficiency. When the injection needle 200 rotates with the chain 320, the heat dissipation plate 222 in the middle rotates synchronously around the axis of the injection needle 200. The air in this area is driven by the heat dissipation plate 222 to form a directional flow along the rotation trajectory of the heat dissipation plate 222, thereby accelerating the flow rate of the air around the heat dissipation plate 220. This allows the heat on the surface of the heat dissipation plate 220 to be carried away by the flowing air more quickly, further enhancing the convective heat dissipation effect. This reduces the heat transferred from the heat dissipation plate 220 downward to the liquid inlet 232 area, thereby ensuring the activity and stability of functional components in the injection solution, such as proteins and enzymes.

[0029] In this embodiment, as Figure 3 and Figure 8 As shown, the height of the cylindrical connecting part 221 is equal to the height of the heat sink part 222, that is, the upper end face of the heat sink part 222 is in contact with the lower end face of the needle seat part 210, and the lower end face of the heat sink part 222 is in contact with the upper end face of the needle body part 230. The heat from the transmission gear part 211 is first transferred to the lower end face of the needle seat part 210, and then to the heat sink part 222. The heat sink part 222 effectively dissipates heat, reducing the heat entering the needle body part 230.

[0030] like Figure 9As shown, a second embodiment of the heat dissipation unit 220 is illustrated. The heat dissipation unit 220 includes a cylindrical connecting part 221. The side wall of the cylindrical connecting part 221 is provided with a plurality of heat dissipation plates 222. The plurality of heat dissipation plates 222 are arranged circumferentially at intervals along the cylindrical connecting part 221 and extend radially outward from the injection needle 200. The plate plane is perpendicular to the axis of the injection needle 200, so that it can contact the surrounding air to the maximum extent when rotated. The height of the heat dissipation plates 222 is less than the height of the cylindrical connecting part 221. That is, the upper end face of the heat dissipation plates 222 is spaced from the lower end face of the needle seat part 210, and the lower end face of the heat dissipation plates 222 is spaced from the upper end face of the needle body part 230, so that the upper and lower end faces of the heat dissipation plates 222 can dissipate heat. This is suitable for scenarios with high heat dissipation requirements.

[0031] like Figure 10 As shown, a third embodiment of the heat dissipation unit 220 is illustrated, which is similar to... Figure 8 The embodiments shown are similar, except that the height of the heat sink 222 is less than the height of the cylindrical connecting part 221. That is, the upper end face of the heat sink 222 is spaced from the lower end face of the needle seat 210, and the lower end face of the heat sink 222 is spaced from the upper end face of the needle body 230. The main function is to increase the heat dissipation area of ​​the heat sink 222.

[0032] like Figure 11 As shown, a fourth embodiment of the heat dissipation unit 220 is illustrated. In this embodiment, the heat dissipation plate 222 consists of multiple cylindrical connecting parts 221. Its main purpose is to increase the heat dissipation area through the cylindrical connecting parts 221. In this embodiment, the heat dissipation area is calculated as follows: the radius of the cylindrical connecting part 221 is r, the axial length is h, and the number is n. The radius of the lower end face of the needle seat part 210 and the upper end face of the needle body part 230 are both R. At this time, the outer surface area of ​​the heat dissipation unit 220 is the sum of the lateral areas of the n cylindrical connecting parts 221. The lateral area of ​​a single cylindrical connecting part 221 is 2πrh, so the outer surface area S of the heat dissipation unit 220 is S = 2πrhn. The area of ​​the lower end face of the needle seat part 210 and the upper end face of the needle body part 230 that is not in contact with the heat dissipation unit 220 is Z, Z = 2π(R 2 -r 2 ), S+Z>2πRh, that is, 2πrhn+2π(R 2 -r 2 If n is 1, the formula is simplified to: π(Rr)(R+r)>πh(Rr), and further, R+r>h. That is, when the number of cylindrical connecting parts 221 is n=1, this relationship must be satisfied so that S+Z>2πRh.

[0033] like Figure 12As shown, a fifth embodiment of the heat dissipation unit 220 is illustrated. In this embodiment, the side of the heat dissipation plate 222 has several grooves 223 or protrusions. The figure mainly shows the heat dissipation plate 222 with several arc-shaped protrusions on the side, and the grooves 223 are similarly provided. The heat dissipation plate 222 is mainly used to dissipate heat through contact with air on its surface. Adding grooves 223 or protrusions to the side can expand the effective heat dissipation area without increasing the overall radial dimension of the heat dissipation plate 222. Furthermore, when the heat dissipation plate 222 rotates with the injection needle 200, it drives the air in the transmission space 110 to form a radial airflow. Traditionally, airflow along a smooth side tends to flow smoothly along the wall, resulting in short contact time between the airflow and the heat sink 222 and insufficient heat exchange. Some heat may diffuse rapidly with the airflow but not be effectively carried away. However, the grooves 223 or protrusions on the side can change the airflow pattern. Specifically, taking a protrusion as an example, when the airflow encounters a protrusion, it will be blocked and diverted, forming a bypass airflow that needs to bypass the surface of the protrusion, thus prolonging the contact time with the heat sink 222. Taking a groove 223 as an example, when the airflow enters the groove 223, it will form a vortex inside the groove 223. The vortex will stay briefly inside the groove 223, repeatedly contacting the inner side of the groove 223, fully absorbing the heat from the surface of the groove 223 before flowing out, thus preventing heat from accumulating in the groove 223 area.

[0034] like Figures 2-5 As shown, the body 100 has a heat dissipation channel 130, which is located on the horizontal side of the heat dissipation part 220. The opening direction is consistent with the airflow diffusion direction when the heat dissipation plate part 222 rotates. The hot air generated by the rotation of the heat dissipation plate part 222 can flow into the transmission space 110 area through the heat dissipation channel 130 to avoid accumulation around the heat dissipation part 220. If the hot air stays in the transmission space 110 for a long time, it will cause the overall temperature of the transmission space 110 to rise. Therefore, a heat dissipation vent 140 is opened at the top of the body 100, that is, the upper side wall of the transmission space 110. The hot air gathered at the top of the transmission space 110 can be discharged to the outside of the body 100 through the heat dissipation vent 140, so that the hot air in the transmission space 110 can be continuously dissipated to the outside, avoiding the overall temperature rise.

[0035] In some possible examples, injection molding machines use plunger pumps instead of centrifugal pumps in traditional solutions as the power source for liquid supply. When injection molding machines use plunger pumps to supply liquid, the liquid is delivered by the reciprocating pushing of the plunger. The movement is smooth and the liquid disturbance is small. Unlike centrifugal pumps, which rely on the high-speed rotation of the impeller to agitate the liquid, this significantly reduces frictional heat generation and eddy current heat generation, resulting in a lower liquid temperature rise. Injection solutions often contain heat-sensitive components such as proteins and enzymes. Low-temperature environments can prevent their denaturation and inactivation, reducing the damage to the solution's functionality. At the same time, stable delivery conditions can also reduce damage to the physical form of the solution, making it suitable for high-quality injection requirements.

[0036] The brine injector mentioned in this embodiment can be configured with a large number of injection needles 200, specifically models such as YS147 (147 needles), YS258 (258 needles), YS369 (369 needles), YS370 (370 needles), etc., to adapt to different batches of meat processing needs.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A brine injector for meat processing, characterized in that, include: The body (100) has a transmission space (110) and a liquid inlet space (120) arranged at intervals between the upper and lower parts, and a drive device (300) is provided in the transmission space (110); An injection needle (200) is rotatably mounted on the body (100). The injection needle (200) includes a needle seat (210), a heat dissipation part (220), and a needle body (230) connected sequentially from top to bottom. The needle seat (210) has a transmission gear (211) that is connected to the drive device (300). The transmission gear (211) is located in the transmission space (110). The transmission gear (211) can drive the needle body (230) to rotate under the action of the drive device (300). The needle body (230) has an injection channel (231) inside. The side wall of the injection channel (231) is provided with a liquid inlet hole (232). The liquid inlet hole (232) is located in the liquid inlet space (120) and communicates with the liquid inlet space (120). The heat dissipation part (220) is used to dissipate the heat transferred from the transmission gear part (211) to the needle body part (230). The outer surface area of ​​the heat dissipation part (220) is S. The area of ​​the lower end face of the needle seat part (210) and the upper end face of the needle body part (230) that are not in contact with the heat dissipation part (220) is Z. The radius of the lower end face of the needle seat part (210) and the upper end face of the needle body part (230) is R. The height of the heat dissipation part (220) is h, where S+Z>2πRh.

2. The brine injector for meat processing according to claim 1, characterized in that, The heat dissipation part (220) includes at least one cylindrical connecting part (221), the diameter of which is r, where r < R.

3. A brine injector for meat processing according to claim 2, characterized in that, The heat dissipation part (220) includes a cylindrical connecting part (221) and a plurality of heat dissipation plate parts (222) disposed on the outer periphery of the cylindrical connecting part (221). The heat dissipation plate parts (222) are arranged circumferentially around the cylindrical connecting part (221) and extend radially along the injection needle (200).

4. A brine injector for meat processing according to claim 2, characterized in that, The heat dissipation part (220) includes a plurality of parallel cylindrical connecting parts (221), and each cylindrical connecting part (221) has a heat dissipation plate part (222) on its outer wall, and the heat dissipation plate part (222) extends radially along the cylindrical connecting part (221).

5. A brine injector for meat processing according to claim 3 or 4, characterized in that, The height of the cylindrical connecting part (221) is greater than or equal to the height of the heat sink part (222).

6. A brine injector for meat processing according to claim 5, characterized in that, The height of the cylindrical connecting part (221) is equal to the height of the heat sink part (222), and the upper end face of the heat sink part (222) is connected to the lower end face of the needle seat part (210), the lower end face of the heat sink part (222) is connected to the upper end face of the needle body part (230), and the heat sink part (222) extends radially along the injection needle (200).

7. A brine injector for meat processing according to claim 6, characterized in that, The heat sink (222) has several grooves (223) or protrusions on its surface.

8. A brine injector for meat processing according to claim 6 or 7, characterized in that, The body (100) has a heat dissipation channel (130) for accommodating the heat dissipation part, and the heat dissipation channel (130) is connected to the transmission space (110).

9. A brine injector for meat processing according to claim 8, characterized in that, The top of the body (100) has a heat dissipation vent (140), which is located above the transmission space (110) and is used to exhaust hot air from the transmission space (110).

10. A brine injector for meat processing according to claim 9, characterized in that, Several injection needles (200) are distributed in two columns, with the injection needles (200) in each column arranged at intervals. The driving device (300) includes a driving member (310) and a chain (320). The chain (320) is connected to the transmission teeth (211) for driving the two columns of injection needles (200) to rotate synchronously and in the same direction.

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