Low-temperature tissue grinding instrument with convenient free switching of refrigerant

Abstract

This invention discloses a low-temperature tissue grinding instrument with convenient and freely switchable refrigerant, specifically comprising: a grinding disc having a disc-shaped structure and a grinding groove disposed on the top of the grinding disc; a grinding support fixedly connected to one side of the grinding disc; a drive motor fixedly connected to the top of the grinding support; the drive shaft of the drive motor passing through the grinding support and fixedly connected to a grinding device; and a protective sleeve covering the outer side of the grinding disc; the grinding disc includes: a disc body with a cooling cavity inside; and a lifting groove disposed at the bottom of the inner wall of the cooling cavity; a lifting platform fixedly connected to the inner wall of the lifting groove; and a heat dissipation slot provided at the top of the inner wall of the cooling cavity. This invention relates to the field of grinding device technology. This low-temperature tissue grinding instrument with convenient and freely switchable refrigerant allows for easy replacement of the refrigerant entering the cooling cavity, facilitating flexible refrigerant replacement to adapt to different grinding needs.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, specifically to a low-temperature tissue grinding instrument that allows for convenient and free switching of the refrigerant. Background Technology

[0002] Currently, many biological experiments require tissue processing beforehand, which involves grinding frozen tissue and adding lysis buffer to extract proteins or RNA. Grinding frozen tissue is typically done manually using a mortar and pestle. However, unlike conventional grinding, to maintain the tissue at a low temperature, a cooling medium needs to be added to the mortar. This prevents RNA degradation and keeps the tissue brittle for easier grinding. However, current grinding devices usually only support one type of cooling medium, making them unsuitable for different grinding needs. Furthermore, the grinding angle is not adjustable, resulting in poor grinding uniformity. Summary of the Invention

[0003] To achieve the above objectives, the present invention provides the following technical solution: a low-temperature tissue grinding instrument that allows for convenient and free switching of refrigerants, specifically comprising:

[0004] The grinding disc has a disc-shaped structure and a grinding groove on the top of the grinding disc. A grinding bracket is fixedly connected to one side of the grinding disc, and a drive motor is fixedly connected to the top of the grinding bracket. The drive shaft of the drive motor passes through the grinding bracket and is fixedly connected to a grinding device. A protective sleeve is fitted on the outside of the grinding disc.

[0005] The grinding disc includes:

[0006] The plate body has a cooling cavity inside and a lifting groove at the bottom of the inner wall of the cooling cavity. A lifting platform is fixedly connected to the inner wall of the lifting groove, and a heat dissipation slot is opened at the top of the inner wall of the cooling cavity.

[0007] A lifting plate, which has a disc-shaped structure, is disposed inside a cooling cavity and is slidably connected to the inner wall of the cooling cavity;

[0008] The liquid inlet is provided in two sets and is respectively connected to the top and bottom of one side of the cooling cavity;

[0009] The liquid outlet is provided in two sets and is respectively connected to the top and bottom of the side of the cooling cavity away from the liquid inlet.

[0010] Equipped with a grinding disc, when grinding is being performed inside the grinding tank, refrigerant can be discharged into the cooling cavity through the liquid inlet. The refrigerant inside the cooling cavity cools the disc, thereby cooling the grinding tank on top of the disc and the grinding material inside. Since there are two sets of liquid inlets and outlets, each connected to a different refrigerant storage tank, when the refrigerant needs to be replaced, the lifting platform moves the lifting disc from the lower liquid inlet side to the upper liquid inlet side. At this time, the upper liquid inlet is blocked by the lifting disc, and the lower liquid inlet is released, allowing the refrigerant entering the cooling cavity to be replaced. This facilitates easy and flexible refrigerant replacement to meet different grinding needs.

[0011] Preferably, one side of the disc is fixedly connected to the grinding bracket, the grinding groove is formed on the top of the disc, and the lifting disc is made of a heat-conducting material.

[0012] Preferably, the liquid inlet holes at the top and bottom of one side of the cooling cavity are connected to two different refrigerant storage tanks through connecting pipes, and the lifting plate is made of thermally conductive material.

[0013] Preferably, the lifting plate has a disc body, a heat dissipation strip is fixedly connected to the top of the disc body, and plugs adapted to the liquid inlet and liquid outlet are fixedly connected to both sides of the disc body, and heat conduction grooves are provided at the top and bottom of the disc body.

[0014] Preferably, the disc body is disposed inside the cooling cavity and slidably connected to the inner wall of the cooling cavity. Multiple sets of heat-conducting grooves are evenly distributed on the disc body. A lifting plate is provided; when the lifting plate moves upward, it drives the heat dissipation strips and the blocking block to move upward. The blocking block seals the liquid inlet at the top, while the heat dissipation strips are inserted into the heat dissipation slots. Heat from inside the grinding groove is then transferred to the heat dissipation strips through the heat dissipation slots. The heat dissipation strips transfer heat to the disc body, where heat exchange occurs between the disc body and the refrigerant below, thus achieving heat dissipation. The heat dissipation strips can be inserted into the heat dissipation slots below the grinding grooves. The cooperation between the heat dissipation slots and the heat dissipation strips improves heat dissipation efficiency and provides a better cooling effect. Furthermore, the heat-conducting grooves on the disc body increase the contact area between the disc body and the refrigerant, resulting in higher heat exchange efficiency.

[0015] Preferably, the heat dissipation strips are provided in multiple sets and are evenly distributed on the top of the disk body. The top of the heat dissipation strips extends into the interior of the heat dissipation slot and is slidably connected to the inner wall of the heat dissipation slot. The width of the heat dissipation strips is smaller than the width of the inner wall of the heat dissipation slot.

[0016] Preferably, the grinding device includes a rotating sleeve, with a telescopic push rod fixedly connected to the inner wall of the rotating sleeve. A conical cylinder is connected to the bottom of the rotating sleeve. A section of the rod is rotatably connected to the bottom of the telescopic push rod via a rotating bolt. The bottom of the section of the rod passes through the conical cylinder and extends to the outside of the conical cylinder. A second section of the rod is rotatably connected to the bottom of the section of the rod via a rotating bolt. A grinding head is connected to the bottom of the second section of the rod via a fixing device. During grinding, the telescopic push rod can extend to move the first section of the rod downward. As the first section of the rod moves downward, it squeezes the second section of the rod, causing the connection between the first and second sections of the rod to bend. At the same time, both the first and second sections of the rod tilt. The second section of the rod drives the grinding head to rotate and shift, which allows the grinding part on the grinding head to change the grinding angle and grinding position, resulting in a better grinding effect. Materials from different areas can be ground through different parts of the grinding head during the grinding process, resulting in better grinding uniformity.

[0017] Preferably, the top of the rotating sleeve is fixedly connected to the drive shaft of the drive motor, and the grinding head extends into the grinding groove.

[0018] Preferably, the fixing device includes an arc-shaped plate, a threaded rod is slidably connected through the side of the arc-shaped plate, an arc-shaped pad is fixedly connected to the center of the bottom of the arc-shaped plate, multiple sets of threaded rods are provided and evenly distributed on the arc-shaped plate, and a sealing ring is fixedly connected to the bottom edge of the arc-shaped plate.

[0019] Preferably, the top center of the arc-shaped plate is fixedly connected to the bottom of the two-section rod. The top of the grinding head has a threaded groove adapted to the threaded rod. The bottom of the threaded rod extends into the threaded groove and is threadedly connected to the inner wall of the threaded groove. A fixing device is provided. When the grinding head needs to be replaced, the threaded rod is pulled out from the threaded groove, the new grinding head is placed under the arc-shaped plate, the threaded rod is inserted into the threaded groove on the new grinding head, and the grinding head and the arc-shaped plate are tightened by rotating the threaded rod. The replacement operation is relatively convenient. In addition, as the grinding head approaches the arc-shaped plate, it continuously squeezes the arc-shaped pad and the sealing ring. The elastic thrust of the arc-shaped pad and the sealing ring can make the threaded groove on the grinding head and the threaded rod tightly connected, avoiding the grinding head from shaking and causing accelerated wear. This improves the stability of the grinding head and reduces its wear.

[0020] This invention provides a low-temperature tissue grinding instrument that allows for convenient and flexible switching of refrigerants. It offers the following advantages:

[0021] 1. This low-temperature tissue grinding instrument allows for convenient and flexible switching of refrigerants. It is equipped with a grinding disc. When grinding is being performed inside the grinding tank, refrigerant can be discharged into the cooling cavity through the inlet. The refrigerant inside the cooling cavity cools the disc, thereby cooling the grinding tank at the top of the disc and the grinding material inside. Since there are two sets of inlet and outlet ports, each connected to different refrigerant storage tanks, when the refrigerant needs to be replaced, the lifting platform moves the lifting disc from the lower inlet side to the upper inlet side. At this time, the upper inlet is blocked by the lifting disc, and the lower inlet is released, allowing the refrigerant entering the cooling cavity to be replaced. This facilitates convenient and flexible refrigerant replacement to adapt to different grinding needs.

[0022] 2. This low-temperature tissue grinding instrument, which allows for convenient and free switching of refrigerant, is equipped with a lifting plate. When the lifting plate moves upward, it drives the heat dissipation strip and the blocking block to move upward as well. The blocking block seals the liquid inlet at the top, while the heat dissipation strip is inserted into the heat dissipation slot. Heat from inside the grinding tank is then transferred to the heat dissipation strip through the heat dissipation slot. The heat dissipation strip then transfers the heat to the disc body, where heat exchange occurs between the disc body and the refrigerant below, thus achieving heat dissipation. The heat dissipation strip can be inserted into the heat dissipation slot below the grinding tank. The cooperation between the heat dissipation slot and the heat dissipation strip improves heat dissipation efficiency and provides a better cooling effect. In addition, the disc body has heat-conducting grooves, which increase the contact area between the disc body and the refrigerant, resulting in higher heat exchange efficiency.

[0023] 3. This low-temperature tissue grinding instrument, which allows for convenient and free switching of refrigerants, is equipped with a grinding device. During grinding, the extension of the telescopic push rod drives a first-section rod downwards. As the first-section rod moves downwards, it squeezes the second-section rod, causing bending at the connection between the first and second-section rods. Simultaneously, both the first and second-section rods tilt, and the second-section rod drives the grinding head to rotate and shift. This allows the grinding part on the grinding head to change its grinding angle and position, resulting in better grinding effect. Materials from different regions can be ground through different parts of the grinding head during the grinding process, resulting in better grinding uniformity.

[0024] 4. This low-temperature tissue grinding instrument allows for convenient and free switching of refrigerants. It is equipped with a fixing device. When the grinding head needs to be replaced, the threaded rod is pulled out of the threaded groove, the new grinding head is placed under the arc-shaped plate, and the threaded rod is inserted into the threaded groove on the new grinding head. While rotating the threaded rod, the grinding head and the arc-shaped plate are tightened together. The replacement operation is convenient. Furthermore, as the grinding head approaches the arc-shaped plate, it continuously compresses the arc-shaped pad and sealing ring. The elastic thrust of the arc-shaped pad and sealing ring ensures a tight connection between the threaded groove and the threaded rod on the grinding head, preventing the grinding head from shaking and causing accelerated wear. This improves the stability of the grinding head and reduces wear. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the grinding disc of the present invention;

[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of the grinding disc of the present invention;

[0028] Figure 4 This is a schematic diagram of the lifting plate structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the grinding device of the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of the rotating sleeve of the present invention;

[0031] Figure 7 This is a schematic diagram of the connection structure of the fixing device of the present invention;

[0032] Figure 8 This is a schematic diagram of the internal structure of the fixing device of the present invention;

[0033] Figure 9 This is a schematic diagram of the exploded structure of the fixing device of the present invention.

[0034] In the diagram: 1. Grinding disc; 11. Disc body; 12. Lifting groove; 13. Lifting platform; 14. Heat dissipation slot; 15. Lifting disc; 151. Disc body; 152. Heat dissipation strip; 153. Block; 154. Heat-conducting groove; 17. Liquid inlet; 18. Liquid outlet; 19. Cooling cavity; 2. Grinding groove; 3. Grinding bracket; 4. Drive motor; 9. Grinding device; 91. Rotating sleeve; 92. Telescopic push rod; 93. Conical cylinder; 94. First-stage rod; 95. Second-stage rod; 96. Grinding head; 97. Fixing device; 971. Arc plate; 972. Threaded rod; 973. Arc pad; 974. Threaded groove; 975. Sealing ring. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0036] Please see Figures 1-3 This invention provides a technical solution: a low-temperature tissue grinding instrument that allows for convenient and free switching of refrigerants, specifically comprising:

[0037] Grinding disc 1 has a disc-shaped structure and a grinding groove 2 set on the top of grinding disc 1. A grinding bracket 3 is fixedly connected to one side of grinding disc 1. A drive motor 4 is fixedly connected to the top of grinding bracket 3. The drive shaft of drive motor 4 passes through grinding bracket 3 and is fixedly connected to grinding device 9. A protective sleeve is fitted on the outside of grinding disc 1.

[0038] Grinding disc 1 includes:

[0039] The plate body 11 has a cooling cavity 19 inside and a lifting groove 12 located at the bottom of the inner wall of the cooling cavity 19. A lifting platform 13 is fixedly connected to the inner wall of the lifting groove 12, and a heat dissipation slot 14 is opened at the top of the inner wall of the cooling cavity 19.

[0040] The lifting plate 15 has a disc-shaped structure and is disposed inside the cooling cavity 19 and slidably connected to the inner wall of the cooling cavity 19.

[0041] Liquid inlet 17, which is provided in two sets and is respectively connected to the top and bottom of one side of the cooling cavity 19;

[0042] The liquid outlet 18 is provided in two sets and is respectively connected to the top and bottom of the side of the cooling cavity 19 away from the liquid inlet 17.

[0043] One side of the disc body 11 is fixedly connected to the grinding bracket 3, and the grinding groove 2 is opened on the top of the disc body 11.

[0044] The liquid inlet holes 17 on the top and bottom of one side of the cooling cavity 19 are connected to two different refrigerant storage tanks through connecting pipes, and the lifting plate 15 is made of heat-conducting material.

[0045] A grinding disc 1 is provided. When grinding is being performed inside the grinding tank 2, refrigerant can be discharged into the cooling cavity 19 through the liquid inlet 17. The refrigerant inside the cooling cavity 19 cools the disc body 11, thereby cooling the grinding tank 2 on top of the disc body 11 and the grinding material inside. Since there are two sets of liquid inlet 17 and liquid outlet 18, which are connected to different refrigerant storage tanks respectively, when the refrigerant needs to be replaced, the lifting platform 13 drives the lifting disc 15 to move, so that the lifting disc 15 moves from the side of the lower liquid inlet 17 to the side of the upper liquid inlet 17. At this time, the upper liquid inlet 17 is blocked by the lifting disc 15, and the lower liquid inlet 17 is released, so that the refrigerant entering the cooling cavity 19 can be replaced. This allows for convenient and free replacement of the refrigerant to meet different grinding needs. Example

[0046] Please see Figures 1-4Based on Embodiment 1, the present invention provides a technical solution: the lifting plate 15 has a disc body 151, a heat dissipation strip 152 fixedly connected to the top of the disc body 151, and plugs 153 adapted to the liquid inlet hole 17 and liquid outlet hole 18 respectively fixedly connected to both sides of the disc body 151. Heat-conducting grooves 154 are provided at the top and bottom of the disc body 151. The disc body 151 is disposed inside the cooling cavity 19 and slidably connected to the inner wall of the cooling cavity 19. Multiple sets of heat-conducting grooves 154 are provided and evenly distributed on the disc body 151. Multiple sets of heat dissipation strips 152 are provided and evenly distributed on the top of the disc body 151. The top of the heat dissipation strips 152 extends into the heat dissipation slot 14 and slidably connects to the inner wall of the heat dissipation slot 14. The width of the heat dissipation strips 152 is smaller than the width of the inner wall of the heat dissipation slot 14. When the lifting plate 15 moves upward, it drives the heat dissipation strip 152 and the blocking block 153 to move upward. The blocking block 153 blocks the liquid inlet hole 17 above. At the same time, the heat dissipation strip 152 is inserted into the heat dissipation slot 14. The heat inside the grinding tank 2 can be transferred to the heat dissipation strip 152 through the heat dissipation slot 14. The heat dissipation strip 152 transfers the heat to the disc body 151. The disc body 151 exchanges heat with the refrigerant below it, thereby achieving heat dissipation. The heat dissipation strip 152 can be inserted into the heat dissipation slot 14 below the grinding tank 2. The cooperation between the heat dissipation slot 14 and the heat dissipation strip 152 can improve the heat dissipation efficiency and the cooling effect is better. At the same time, the disc body 151 is provided with a heat-conducting groove 154, which can increase the contact area between the disc body 151 and the refrigerant, resulting in higher heat exchange efficiency. Example

[0047] Please see Figures 1-6Based on Embodiments 1 and 2, the present invention provides a technical solution: the grinding device 9 includes a rotating sleeve 91, a telescopic push rod 92 fixedly connected to the inner wall of the rotating sleeve 91, a conical cylinder 93 connected to the bottom of the rotating sleeve 91, a section rod 94 rotatably connected to the bottom of the telescopic push rod 92 via a rotating bolt, the bottom of the section rod 94 penetrating through the conical cylinder 93 and extending to the outside of the conical cylinder 93, a second section rod 95 rotatably connected to the bottom of the section rod 94 via a rotating bolt, a grinding head 96 connected to the bottom of the second section rod 95 via a fixing device 97, the top of the rotating sleeve 91 fixedly connected to the drive shaft of the drive motor 4, and the grinding head 96... Extending into the grinding tank 2, a grinding device 9 is installed. During grinding, the telescopic push rod 92 extends and drives the first section rod 94 to move downward. As the first section rod 94 moves downward, it squeezes the second section rod 95, causing the connection between the first section rod 94 and the second section rod 95 to bend. At the same time, both the first section rod 94 and the second section rod 95 tilt. The second section rod 95 drives the grinding head 96 to rotate and shift, which makes it easier to change the grinding angle and grinding position of the grinding part on the grinding head 96, resulting in a better grinding effect. Materials from different areas can be ground through different parts of the grinding head 96 during the grinding process, resulting in better grinding uniformity. Example

[0048] Please see Figures 1-9 Based on Embodiments 1, 2, and 3, the present invention provides a technical solution: The fixing device 97 includes an arc-shaped plate 971, with a threaded rod 972 slidably connected through and to the side of the arc-shaped plate 971. An arc-shaped pad 973 is fixedly connected to the center of the bottom of the arc-shaped plate 971. Multiple sets of threaded rods 972 are evenly distributed on the arc-shaped plate 971. A sealing ring 975 is fixedly connected to the bottom edge of the arc-shaped plate 971. The center of the top of the arc-shaped plate 971 is fixedly connected to the bottom of the two-section rod 95. The grinding head 96 has a threaded groove 974 at its top that matches the threaded rod 972. The bottom of the threaded rod 972 extends into the threaded groove 974 and is threadedly connected to the inner wall of the threaded groove 974. The fixing device 97 is provided so that when the grinding head needs to be replaced... At time 96, the threaded rod 972 is pulled out from the threaded groove 974, and the new grinding head 96 is placed under the arc plate 971. The threaded rod 972 is inserted into the threaded groove 974 on the new grinding head 96. While rotating the threaded rod 972, the grinding head 96 and the arc plate 971 are tightened through the threaded rod 972. The replacement operation is relatively convenient. In addition, as the grinding head 96 moves towards the arc plate 971, it continuously squeezes the arc pad 973 and the sealing ring 975. Through the elastic thrust of the arc pad 973 and the sealing ring 975, the threaded groove 974 on the grinding head 96 and the threaded rod 972 are tightly connected, which prevents the grinding head 96 from shaking and causing accelerated wear. This improves the stability of the grinding head 96 and reduces the wear of the grinding head.

[0049] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A low-temperature tissue homogenizer with convenient and flexible refrigerant switching, specifically comprising: Grinding disc (1), which has a disc-shaped structure and a grinding groove (2) set on the top of the grinding disc (1), a grinding bracket (3) is fixedly connected to one side of the grinding disc (1), a drive motor (4) is fixedly connected to the top of the grinding bracket (3), the drive shaft of the drive motor (4) passes through the grinding bracket (3) and is fixedly connected to the grinding device (9), and a protective sleeve is fitted on the outside of the grinding disc (1); The low-temperature tissue homogenizer that allows for convenient and free switching of refrigerant is characterized in that: the homogenizing disc (1) comprises: The plate (11) has a cooling cavity (19) inside and a lifting groove (12) at the bottom of the inner wall of the cooling cavity (19). A lifting platform (13) is fixedly connected to the inner wall of the lifting groove (12). A heat dissipation slot (14) is opened at the top of the inner wall of the cooling cavity (19). The lifting plate (15) has a disc-shaped structure and is disposed inside the cooling cavity (19) and slidably connected to the inner wall of the cooling cavity (19). Liquid inlet (17) is provided in two sets and is respectively connected to the top and bottom of one side of the cooling cavity (19); Liquid outlet (18), which is provided in two sets and is respectively connected to the top and bottom of the side of the cooling cavity (19) away from the liquid inlet (17); The lifting plate (15) has a disc body (151), a heat dissipation strip (152) is fixedly connected to the top of the disc body (151), and a plug (153) that is adapted to the liquid inlet hole (17) and the liquid outlet hole (18) are fixedly connected to both sides of the disc body (151).

2. The low-temperature tissue homogenizer with convenient and freely switchable refrigerant as described in claim 1, characterized in that: The disc body (11) is fixedly connected to the grinding bracket (3) on one side, the grinding groove (2) is opened on the top of the disc body (11), and the lifting disc (15) is made of heat-conducting material.

3. The low-temperature tissue homogenizer with convenient and freely switchable refrigerant as described in claim 1, characterized in that: The liquid inlet holes (17) at the top and bottom of one side of the cooling cavity (19) are connected to two different refrigerant storage tanks through connecting pipes, and the lifting plate (15) is made of heat-conducting material.

4. A low-temperature tissue homogenizer with convenient and freely switchable refrigerant as described in claim 1, characterized in that: The disk body (151) has heat-conducting grooves (154) at both the top and bottom.

5. A low-temperature tissue homogenizer with convenient and freely switchable refrigerant according to claim 4, characterized in that: The disk body (151) is disposed inside the cooling cavity (19) and is slidably connected to the inner wall of the cooling cavity (19). The heat-conducting grooves (154) are provided in multiple sets and are evenly distributed on the disk body (151).

6. A low-temperature tissue homogenizer with convenient and freely switchable refrigerant according to claim 4, characterized in that: The heat dissipation strips (152) are provided in multiple sets and are evenly distributed on the top of the disk body (151). The top of the heat dissipation strips (152) extends into the heat dissipation slot (14) and slides in connection with the inner wall of the heat dissipation slot (14). The width of the heat dissipation strips (152) is smaller than the width of the inner wall of the heat dissipation slot (14).

7. A low-temperature tissue homogenizer with convenient and freely switchable refrigerant according to claim 1, characterized in that: The grinding device (9) includes a rotating sleeve (91), a telescopic push rod (92) is fixedly connected to the inner wall of the rotating sleeve (91), a conical cylinder (93) is connected to the bottom of the rotating sleeve (91), a section rod (94) is rotatably connected to the bottom of the telescopic push rod (92) through a rotating bolt, the bottom of the section rod (94) passes through the conical cylinder (93) and extends to the outside of the conical cylinder (93), a second section rod (95) is rotatably connected to the bottom of the section rod (94) through a rotating bolt, and a grinding head (96) is connected to the bottom of the second section rod (95) through a fixing device (97).

8. A low-temperature tissue homogenizer with convenient and freely switchable refrigerant according to claim 7, characterized in that: The top of the rotating sleeve (91) is fixedly connected to the drive shaft of the drive motor (4), and the grinding head (96) extends into the grinding groove (2).

9. A low-temperature tissue homogenizer with convenient and freely switchable refrigerant according to claim 7, characterized in that: The fixing device (97) includes an arc-shaped plate (971), a threaded rod (972) is slidably connected through the side of the arc-shaped plate (971), an arc-shaped pad (973) is fixedly connected at the center of the bottom of the arc-shaped plate (971), multiple sets of threaded rods (972) are provided and evenly distributed on the arc-shaped plate (971), and a sealing ring (975) is fixedly connected to the bottom edge of the arc-shaped plate (971).

10. A low-temperature tissue homogenizer with convenient and freely switchable refrigerant according to claim 9, characterized in that: The top center of the arc plate (971) is fixedly connected to the bottom of the two-section rod (95). The top of the grinding head (96) is provided with a threaded groove (974) that is compatible with the threaded rod (972). The bottom of the threaded rod (972) extends into the threaded groove (974) and is threadedly connected to the inner wall of the threaded groove (974).

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