Cascade refrigerating unit for medical intermediates

Abstract

The invention discloses a cascade refrigerating unit for medical intermediates, and relates to the technical field of cascade refrigerators, the cascade refrigerating unit comprises two evaporators, a cold cylinder is arranged above the evaporators, two air pumps are arranged above the cold cylinder, and cold air pipes are fixed to the sides, away from each other, of the air pumps in a penetrating mode; the end, away from the air pump, of the cold air pipe penetrates through and is fixedly connected with the top of the outer wall of the cold cylinder, L-shaped pipes are fixed to the top of the outer wall of the air pump, the bottom ends of the L-shaped pipes penetrate through and are fixedly connected with the top of the evaporator, the U-shaped pipes are fixed to the top face of the cold cylinder, and a cold tank is fixed to the bottom ends of the U-shaped pipes. An exhaust pipe is arranged at the bottom of the left side of the cold tank, a motor is fixed to the bottom face of the cold tank, and the cold tank is located in front of the evaporator. Impurities in cold air are filtered through an activated carbon plate, so that the problem that the synthesis effect of medical intermediates is poor due to the fact that the impurities are contained in the cold air is solved.

Description

Technical Field

[0001] The invention relates to the technical field of cascade refrigerators, in particular to a cascade refrigerator unit for pharmaceutical intermediates. Background Art

[0002] Pharmaceutical intermediates are semi-finished products in the drug synthesis process, usually referring to raw materials for traditional Chinese medicine. Many of these intermediates' synthesis reactions, crystallization processes (such as low-temperature crystallization to increase purity), and solvent recovery (such as low-boiling-point solvents) need to be carried out at temperatures ranging from -40°C to -80°C or even lower. The main function of the cascade refrigeration unit for pharmaceutical intermediates is to create equipment for cold storage of pharmaceutical intermediates, achieving deep refrigeration and ensuring the quality and effectiveness of pharmaceutical intermediates.

[0003] Patent No. CN220083359U discloses a cascade refrigeration unit for pharmaceutical intermediates, including a box body, an evaporator is connected to one side wall of the box body, a delivery pipe is connected to one side wall of the evaporator, a low-temperature box assembly is installed on the other end of the delivery pipe, the low-temperature box assembly includes a low-temperature box body, a slide groove is provided at the bottom edge of the low-temperature box body, a baffle is provided in the low-temperature box body, a cavity is provided between the low-temperature box body and the baffle, several groups of storage plates are provided on the baffle, several groups of delivery ports are provided on the baffle, an air pump is provided on the bottom inner wall of the low-temperature box body, an opening and closing door structure is provided on the side wall of the low-temperature box body away from the delivery pipe, and an observation window is installed on one side wall of the opening and closing door structure, which avoids squeezing of stored items due to the small space and improves the integrity of stored items.

[0004] However, the current cascade refrigeration units used for pharmaceutical intermediates have the following problems: during the continuous refrigeration process of the cascade refrigeration unit, impurities contained in the cold air can easily contaminate the pharmaceutical intermediates, thereby resulting in poor synthesis effect of the pharmaceutical intermediates. Therefore, we propose a cascade refrigeration unit for pharmaceutical intermediates. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a cascade refrigeration unit for pharmaceutical intermediates, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, the present invention is implemented through the following technical solutions: a cascade refrigeration unit for pharmaceutical intermediates, comprising: two groups of evaporators, a cold cylinder is arranged above the evaporator, two air pumps are arranged above the cold cylinder, cold air pipes are respectively passed through and fixed on the sides of the air pumps away from each other, one end of the cold air pipe away from the air pump is passed through and fixedly connected to the top of the outer wall of the cold cylinder, an L-shaped tube is respectively fixed on the top of the outer wall of the air pump, the bottom end of the L-shaped tube is respectively passed through and fixedly connected to the top of the evaporator, a U-shaped tube, the U-shaped tube is fixed to the top surface of the cold cylinder, a cold tank is fixed to the bottom end of the U-shaped tube, an exhaust pipe is opened at the bottom left of the cold tank, a motor is fixed on the bottom surface of the cold tank, the cold tank is located in front of the evaporator, a shaft disk, the shaft disk passes through and is rotatably installed It is installed at the bottom end of the cold tank, the bottom end of the shaft disc is fixedly connected to the top surface of the motor's rotating shaft, and several activated carbon plates are fixed on the top surface of the shaft disc, and a ring frame is fixed above the inner wall of the cold tank, and a concave ring frame is fixed on the top surface of the activated carbon plate, and the outer wall of the concave ring frame is rotatably connected to the inner wall of the ring frame. The L-shaped tube extracts cold air from the evaporator, and the L-shaped tube transports it to the air pump. The air pump inputs cold air into the cold air pipe, the cold air pipe transports cold air into the cold cylinder, the cold cylinder transports cold air into the U-shaped tube, and the U-shaped tube transports cold air into the cold tank. The rotating shaft of the motor on the cold tank drives the shaft disc to rotate forward, the shaft disc drives the activated carbon plate to rotate forward, the activated carbon plate drives the ring frame to rotate forward, and the ring frame rotates in the concave ring frame, so that the activated carbon plate contacts the cold air in the cold tank over a large area during the rotation process, and the activated carbon plate is used to filter impurities in the cold air.

[0007] According to the above technical solution, a round cover is fixedly installed on the right side of the evaporator, and two air ports are opened on the right side of the round cover. The air ports are used for heat exchange of the evaporator. A drain pipe is passed through and fixed on the bottom of the left and right sides of the cold cylinder. The drain pipe is used to discharge condensed water in the cold cylinder.

[0008] According to the above technical solution, the bottom surface of the cold tank is provided with supporting legs, the activated carbon plate includes a circular frame and a carbon plate body, the bottom surface of the circular frame of the activated carbon plate is fixed on the top surface of the shaft disk, and the carbon plate body is installed on the inner wall of the circular frame, and the circular frame is used to stably support the carbon plate body.

[0009] According to the above technical solution, the U-shaped tube is located between the two air pumps, the exhaust pipe is located in front of the evaporator, and the rack is located directly below the U-shaped tube.

[0010] According to the above technical solution, a sterilization device is provided on the top surface of the ring frame, which is used to kill bacteria in the cold air. A fan device is provided on the top of the outer wall of the sterilization device, which is used to fan the cold air accumulated above the inside of the cold tank.

[0011] According to the above technical solution, the sterilization device includes a horizontal plate, which is fixed on the top surface of the ring frame, a circular cover fixed in the middle of the bottom surface of the horizontal plate, a violet lamp, which is fixedly installed on the top of the inner part of the circular cover, and a hole cylinder, which is installed on the inner wall of the circular cover. A number of circular holes are opened on the outer wall of the hole cylinder. The horizontal plate drives the circular cover to rotate forward, the circular cover drives the violet lamp to rotate forward, and the circular cover drives the hole cylinder to rotate forward. The ultraviolet light of the violet lamp rotates through the circular hole of the hole cylinder and irradiates the cold tank. The ultraviolet light irradiated by the violet lamp is used to kill bacteria in the cold air.

[0012] According to the above technical solution, two L-shaped plates are fixed to the outer wall of the circular cover, and a thin rod is fixed to the bottom surface of each L-shaped plate. A spring is fixed to the bottom end of each thin rod. The end of the spring away from the thin rod is fixedly connected to the top surface of the shaft disk. The L-shaped plate drives the thin rod to rotate forward, and the thin rod drives the spring to rotate forward. The spring rotates with the shaft disk, and the thin rod supports the circular cover through the elastic force of the spring compression, thereby reducing the amplitude of the circular cover when it rotates.

[0013] According to the above technical solution, the circular cover is located in the middle of the ring frame, the ultraviolet lamp is suspended in the middle of the hole tube, the hole tube is suspended above the shaft disk, and the L-shaped plate is located below the horizontal plate.

[0014] According to the above technical solution, the fan device includes a circular frame, which is fixed on the top of the outer wall of the thin rod, and a slanted plate is fixed on the top surface of the circular frame, and the slanted plate is in an inverted eight shape, a long rod, and the long rod passes through and is fixed on the side where the two slanted plates are close to each other. The long rod is used to support the slanted plates, and an arc-shaped fan plate, which is fixed on one end of the two slanted plates away from the circular frame. The circular frame drives the slanted plate to rotate forward, and the slanted plate drives the long rod to rotate forward. The long rod supports the slanted plate to rotate, and the slanted plate drives the arc-shaped fan plate to rotate forward, and the arc-shaped fan plate fans the cold air above the inside of the cold tank.

[0015] According to the above technical solution, two ring blocks are fixed on the outer wall of the long rod, a wide plate is fixed on the top surface of the ring block, and a thermometer is fixed on the top surface of the wide plate. The ring blocks drive the wide plate to rotate forward, and the wide plate drives the thermometer to rotate forward. During the rotation process, the thermometer contacts the cold air in the cold tank over a large area, and the thermometer is used to monitor the coldness of the cold air in the cold tank.

[0016] The present invention provides a cascade refrigeration unit for pharmaceutical intermediates. It has the following beneficial effects: (1) The present invention uses an evaporator, a cold cylinder, a cold air pipe, an air pump, an L-shaped pipe, a U-shaped pipe, a cold tank, an exhaust pipe, a shaft disc, an activated carbon plate and a ring frame in conjunction with a concave ring frame. The L-shaped pipe extracts cold air from the evaporator, the L-shaped pipe transports it to the air pump, the air pump inputs cold air into the cold air pipe, the cold air pipe transports cold air into the cold cylinder, the cold cylinder transports cold air into the U-shaped pipe, the U-shaped pipe transports cold air into the cold tank, the rotating shaft of the motor on the cold tank drives the shaft disc to rotate forward, the shaft disc drives the activated carbon plate to rotate forward, the activated carbon plate drives the ring frame to rotate forward, and the ring frame rotates in the concave ring frame, so that the activated carbon plate contacts the cold air in the cold tank over a large area during the rotation process, and the activated carbon plate filters impurities in the cold air to prevent the cold air from containing impurities and causing poor synthesis effect of the pharmaceutical intermediate.

[0017] (2) The present invention arranges the sterilization device so that the horizontal plate, the circular cover and the ultraviolet lamp cooperate with the hole cylinder. The horizontal plate drives the circular cover to rotate forward, the circular cover drives the ultraviolet lamp to rotate forward, and the circular cover drives the hole cylinder to rotate forward. The ultraviolet light of the ultraviolet lamp rotates through the circular hole of the hole cylinder and irradiates the cold tank. The circular hole of the hole cylinder emits ultraviolet light to kill bacteria in the cold air, thereby preventing the cold air in the cold tank from containing bacteria and causing bacterial contamination of the pharmaceutical intermediates.

[0018] (3) The present invention arranges the sterilization device so that the L-shaped plate and the thin rod cooperate with the spring. The L-shaped plate drives the thin rod to rotate forward, and the thin rod drives the spring to rotate forward. The spring rotates along with the shaft disk, so that the thin rod supports the L-shaped plate through the compression force of the spring, and the L-shaped plate supports the rotating circular cover, thereby preventing the circular cover from generating strong amplitude and causing the ultraviolet light to be easily damaged by vibration.

[0019] (4) The present invention arranges the fan device so that the circular frame, the inclined plate and the long rod cooperate with the arc fan plate. The circular frame drives the inclined plate to rotate forward, the inclined plate drives the long rod to rotate forward, the long rod supports the inclined plate to rotate, and the inclined plate drives the arc fan plate to rotate forward. During the rotation process, the arc fan plate fans the cold air accumulated above the cold tank, preventing the cold air from accumulating above the cold tank and causing poor cooling effect of the cold tank.

[0020] (5) The present invention arranges the fan device so that the ring block and the wide plate cooperate with the temperature detector. The ring block drives the wide plate to rotate forward, and the wide plate drives the temperature detector to rotate forward. During the rotation process, the temperature detector contacts the cold air in the cold tank over a large area, thereby preventing the cold air discharged from the cold tank from being discharged at an inaccurate level, which may cause poor synthesis quality of the pharmaceutical intermediate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the present invention as a whole; Figure 2 is a schematic diagram of the internal components of the present invention; Figure 3 It is a cross-sectional schematic diagram of the cold tank of the present invention; Figure 4 is a schematic diagram of the sterilization device of the present invention; Figure 5For the present invention Figure 4 A partial enlarged schematic diagram of point A in the middle; Figure 6 is a schematic diagram of a fan device of the present invention; Figure 7 For the present invention Figure 6 A partial enlarged schematic diagram of point B in the middle.

[0022] In the figure: 1. evaporator; 101. round cover; 102. air port; 2. cold cylinder; 201. drain pipe; 3. cold air pipe; 4. air pump; 5. L-shaped pipe; 6. U-shaped pipe; 7. cold tank; 8. exhaust pipe; 9. shaft disc; 10. activated carbon plate; 11. ring frame; 12. concave ring frame; 13. sterilizing device; 131. horizontal plate; 132. round cover; 133. purple light lamp; 134. hole cylinder; 135. L-shaped plate; 136. thin rod; 137. spring; 14. fan device; 141. circular frame; 142. inclined plate; 143. long rod; 144. curved fan plate; 145. ring block; 146. wide plate; 147. thermometer. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] See also Figure 1-Figure 7 One embodiment of the present invention is a cascade refrigeration unit for pharmaceutical intermediates, comprising: two sets of evaporators 1, each having a round cover 101 fixedly mounted on the right side of each evaporator 1, each having two air ports 102 on the right side of each round cover 101, the air ports 102 being used for heat exchange with the evaporators 1, a cooling cylinder 2 being disposed above the evaporators 1, a drain pipe 201 being passed through and fixed to the bottom of each of the left and right sides of the cooling cylinder 2, the drain pipe 201 being used to discharge condensed water in the cooling cylinder 2; Two air pumps 4 are provided above the cold cylinder 2, and a cold air pipe 3 is respectively passed through and fixed on the side of the air pumps 4 away from each other. One end of the cold air pipe 3 away from the air pump 4 passes through and is fixedly connected to the top of the outer wall of the cold cylinder 2. An L-shaped tube 5 is fixed to the top of the outer wall of the air pump 4. The bottom ends of the L-shaped tubes 5 are respectively passed through and fixedly connected to the top of the evaporator 1, and a U-shaped tube 6 is fixed to the top surface of the cold cylinder 2. The U-shaped tube 6 is located in the middle of the two air pumps 4. A cold tank 7 is fixed to the bottom end of the U-shaped tube 6. A supporting leg is provided on the bottom surface of the cold tank 7. An exhaust pipe 8 is provided on the bottom left side of the cold tank 7. The exhaust pipe 8 is located in front of the evaporator 1. A motor is fixed on the bottom surface of the cold tank 7. The cold tank 7 is located at the evaporator In front of the device 1, the shaft disc 9 is passed through and rotatably installed at the bottom end of the inner part of the cold tank 7. The bottom end of the shaft disc 9 is fixedly connected to the top surface of the rotating shaft of the motor. Several activated carbon plates 10 are fixed on the top surface of the shaft disc 9. The activated carbon plate 10 includes a circular frame and a carbon plate body. The bottom surface of the circular frame of the activated carbon plate 10 is fixed to the top surface of the shaft disc 9. The carbon plate body is installed on the inner wall of the circular frame. The circular frame is used to stably support the carbon plate body. A ring frame 11 is fixed above the inner wall of the cold tank 7. The ring frame 11 is located directly below the U-shaped tube 6. A concave ring frame 12 is fixed to the top surface of the activated carbon plate 10. The outer wall of the concave ring frame 12 is rotatably connected to the inner wall of the ring frame 11. The activated carbon plate 10 is used to filter impurities in the cold air. When using this equipment, the operator starts the evaporator 1 and the air pump 4, and the round cover 101 is covered on the evaporator 1. The evaporator 1 exchanges heat through the air port 102 to produce cold air. The L-shaped tube 5 extracts the cold air in the evaporator 1, and the L-shaped tube 5 transports it to the air pump 4. The air pump 4 inputs the cold air into the cold air pipe 3, and the cold air pipe 3 transports the cold air into the cold cylinder 2. The drain pipe 201 on the cold cylinder 2 discharges condensed water. The cold cylinder 2 transports the cold air into the U-shaped tube 6, and the U-shaped tube 6 transports the cold air into the cold tank 7. The operator starts the motor on the cold tank 7, and the motor shaft starts to rotate forward, and the motor shaft drives the shaft The disk 9 rotates forward, the shaft disk 9 rotates forward in the cold tank 7, the shaft disk 9 drives the activated carbon plate 10 to rotate forward, the activated carbon plate 10 drives the ring frame 11 to rotate forward, and the ring frame 11 rotates in the concave ring frame 12, so that the activated carbon plate 10 contacts the cold air in the cold tank 7 over a large area during the rotation process, the activated carbon plate 10 filters impurities in the cold air, and the exhaust pipe 8 discharges the cold air into the refrigerator, so that the pharmaceutical intermediates can be continuously refrigerated in the impurity-free cold air, thereby avoiding the problem of poor synthesis effect of the pharmaceutical intermediates caused by impurities in the cold air when the cascade refrigeration unit continuously refrigerates the pharmaceutical intermediates; The top surface of the ring frame 11 is provided with a sterilizing device 13 for killing bacteria in the cold air. The top of the outer wall of the sterilizing device 13 is provided with a fan device 14 for fanning the cold air accumulated above the inside of the cold tank 7.

[0025] Working principle: The L-shaped tube 5 extracts cold air from the evaporator 1, and the L-shaped tube 5 transports it to the air pump 4. The air pump 4 inputs cold air into the cold air pipe 3. The cold air pipe 3 transports cold air into the cold cylinder 2. The drain pipe 201 on the cold cylinder 2 discharges condensed water. The cold cylinder 2 transports cold air into the U-shaped tube 6. The U-shaped tube 6 transports cold air into the cold tank 7. The motor shaft drives the shaft disc 9 to rotate forward, and the shaft disc 9 rotates forward in the cold tank 7. The shaft disc 9 drives the activated carbon plate 10 to rotate forward, and the activated carbon plate 10 drives the ring frame 11 to rotate forward, and the ring frame 11 rotates in the concave ring frame 12.

[0026] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, the sterilization device 13 includes a horizontal plate 131, which is fixed to the top surface of the ring frame 11, a circular cover 132 is fixed in the middle of the bottom surface of the horizontal plate 131, a purple light lamp 133, which is fixedly mounted on the top of the inner side of the circular cover 132, a hole cylinder 134, which is mounted on the inner wall of the circular cover 132, and a plurality of circular holes are opened on the outer wall of the hole cylinder 134. The circular cover 132 is located in the middle of the inner side of the ring frame 11, the purple light lamp 133 is suspended in the middle of the inner side of the hole cylinder 134, and the hole cylinder 134 is suspended above the shaft disc 9. The ultraviolet light irradiated by the purple light lamp 133 is used to kill bacteria in the cold air. While the activated carbon plate 10 drives the ring frame 11 to rotate forward, the ring frame 11 drives the cross plate 131 to rotate forward, the cross plate 131 drives the round cover 132 to rotate forward, the round cover 132 drives the ultraviolet lamp 133 to rotate forward, and the round cover 132 drives the hole cylinder 134 to rotate forward. The operator starts the ultraviolet lamp 133, and the ultraviolet lamp 133 emits ultraviolet light. The ultraviolet light of the ultraviolet lamp 133 rotates through the circular hole of the hole cylinder 134 and irradiates the cold tank 7, so that the circular hole of the hole cylinder 134 emits ultraviolet light to kill bacteria in the cold air, thereby avoiding the problem of bacterial contamination of the pharmaceutical intermediates due to bacteria in the cold air in the cold tank 7 when the cascade refrigeration unit continues to refrigerate the pharmaceutical intermediates.

[0027] Two L-shaped plates 135 are fixed to the outer wall of the circular cover 132. The L-shaped plates 135 are located below the horizontal plate 131. A thin rod 136 is fixed to the bottom surface of each L-shaped plate 135. A spring 137 is fixed to the bottom end of each thin rod 136. The end of the spring 137 away from the thin rod 136 is fixedly connected to the top surface of the shaft disc 9. The thin rod 136 supports the circular cover 132 through the elastic force of the spring 137, thereby reducing the amplitude of the circular cover 132 when it rotates. While the circular cover 132 drives the ultraviolet lamp 133 to rotate forward, the circular cover 132 drives the L-shaped plate 135 to rotate forward, the L-shaped plate 135 drives the thin rod 136 to rotate forward, and the thin rod 136 drives the spring 137 to rotate forward. The spring 137 rotates along with the shaft disk 9, so that the thin rod 136 supports the L-shaped plate 135 through the compression force of the spring 137, and the L-shaped plate 135 supports the rotating circular cover 132, so that the circular cover 132 will not generate strong amplitude during the rotation process, thereby avoiding the problem that when the cascade refrigeration unit continuously refrigerates pharmaceutical intermediates, the circular cover 132 generates strong amplitude, which causes the ultraviolet lamp 133 to be easily damaged by vibration.

[0028] The fan device 14 includes a circular frame 141, which is respectively fixed to the top of the outer wall of the thin rod 136. A slanted plate 142 is fixed to the top surface of the circular frame 141. The slanted plate 142 is in an inverted eight-shaped shape, a long rod 143, and the long rod 143 passes through and is fixed on the side where the two slanted plates 142 are close to each other. The long rod 143 is used to support the slanted plates 142, and an arc-shaped fan plate 144. The arc-shaped fan plate 144 is respectively fixed to one end of the two slanted plates 142 away from the circular frame 141. The arc-shaped fan plate 144 fans the cold air above the inside of the cold tank 7; While the L-shaped plate 135 drives the thin rod 136 to rotate forward, the thin rod 136 drives the circular frame 141 to rotate forward, the circular frame 141 drives the inclined plate 142 to rotate forward, the inclined plate 142 drives the long rod 143 to rotate forward, and the long rod 143 supports the rotation of the inclined plate 142. At the same time, the inclined plate 142 drives the arc-shaped fan plate 144 to rotate forward. The arc-shaped fan plate 144 fans the cold air accumulated above the cold tank 7 during the rotation process, thereby avoiding the problem of cold air accumulating above the cold tank 7 and causing poor cooling effect of the cold tank 7 when the cascade refrigeration unit continues to refrigerate pharmaceutical intermediates.

[0029] Two ring blocks 145 are fixed to the outer wall of the long rod 143. A wide plate 146 is fixed to the top surface of the ring block 145. A temperature detector 147 is fixed to the top surface of the wide plate 146. The temperature detector 147 is used to monitor the cold air in the cold tank 7. While the inclined plate 142 drives the long rod 143 to rotate forward, the long rod 143 drives the ring block 145 to rotate forward, the ring block 145 drives the wide plate 146 to rotate forward, and the wide plate 146 drives the thermometer 147 to rotate forward. During the rotation process, the thermometer 147 contacts the cold air in the cold tank 7 over a large area, allowing the thermometer 147 to monitor the coldness of the cold air in the cold tank 7 in real time, thereby avoiding the problem of poor synthesis quality of pharmaceutical intermediates caused by inaccurate cold air discharged from the cold tank 7 when the cascade refrigeration unit continuously refrigerates pharmaceutical intermediates.

[0030] Working principle: The ring frame 11 drives the horizontal plate 131 to rotate forward, the horizontal plate 131 drives the circular cover 132 to rotate forward, the circular cover 132 drives the ultraviolet lamp 133 to rotate forward, the circular cover 132 drives the hole cylinder 134 to rotate forward, and the ultraviolet light of the ultraviolet lamp 133 rotates through the circular hole of the hole cylinder 134 and irradiates the cold tank 7; The circular cover 132 drives the L-shaped plate 135 to rotate forward, the L-shaped plate 135 drives the thin rod 136 to rotate forward, the thin rod 136 drives the spring 137 to rotate forward, and the spring 137 rotates along with the shaft disc 9, so that the thin rod 136 supports the L-shaped plate 135 through the compression force of the spring 137, and the L-shaped plate 135 supports the rotating circular cover 132; The thin rod 136 drives the circular frame 141 to rotate forward, the circular frame 141 drives the inclined plate 142 to rotate forward, the inclined plate 142 drives the long rod 143 to rotate forward, the long rod 143 supports the inclined plate 142 to rotate, and at the same time, the inclined plate 142 drives the arc-shaped fan plate 144 to rotate forward. The arc-shaped fan plate 144 fans the cold air accumulated above the cold tank 7 during the rotation process; The long rod 143 drives the ring block 145 to rotate forward, the ring block 145 drives the wide plate 146 to rotate forward, and the wide plate 146 drives the thermometer 147 to rotate forward. During the rotation process, the thermometer 147 contacts the cold air in the cold tank 7 over a large area, and the thermometer 147 monitors the coldness of the cold air in the cold tank 7 in real time.

[0031] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A cascade refrigeration unit for pharmaceutical intermediates, comprising: Two groups of evaporators (1), a cold cylinder (2) is provided above the evaporator (1), two air pumps (4) are provided above the cold cylinder (2), cold air pipes (3) are respectively passed through and fixed on the sides of the air pumps (4) away from each other, one end of the cold air pipe (3) away from the air pump (4) is passed through and fixedly connected to the top of the outer wall of the cold cylinder (2), an L-shaped tube (5) is respectively fixed to the top of the outer wall of the air pump (4), and the bottom end of the L-shaped tube (5) is respectively passed through and fixedly connected to the top of the evaporator (1); A U-shaped tube (6), wherein the U-shaped tube (6) is fixed to the top surface of the cold cylinder (2), a cold tank (7) is fixed to the bottom end of the U-shaped tube (6), an exhaust pipe (8) is opened at the bottom left of the cold tank (7), a motor is fixed to the bottom surface of the cold tank (7), and the cold tank (7) is located in front of the evaporator (1); A shaft disc (9) is provided, wherein the shaft disc (9) passes through and is rotatably mounted on the bottom end of the interior of the cold tank (7), the bottom end of the shaft disc (9) is fixedly connected to the top surface of the rotating shaft of the motor, a plurality of activated carbon plates (10) are fixed to the top surface of the shaft disc (9), a ring frame (11) is fixed above the inner wall of the cold tank (7), a concave ring frame (12) is fixed to the top surface of the activated carbon plate (10), the outer wall of the concave ring frame (12) is rotatably connected to the inner wall of the ring frame (11), and the activated carbon plate (10) is used to filter impurities in the cold air.

2. The cascade refrigeration unit for pharmaceutical intermediates according to claim 1, characterized in that: A round cover (101) is fixedly installed on the right side of the evaporator (1), and two air ports (102) are respectively opened on the right side of the round cover (101). The air ports (102) are used for heat exchange of the evaporator (1). A drain pipe (201) is passed through and fixed on the bottom of the left and right sides of the cooling cylinder (2). The drain pipe (201) is used to discharge condensed water in the cooling cylinder (2).

3. The cascade refrigeration unit for pharmaceutical intermediates according to claim 2, characterized in that: The bottom surface of the cold tank (7) is provided with supporting legs, and the activated carbon plate (10) comprises a circular frame and a carbon plate body, the bottom surface of the circular frame of the activated carbon plate (10) is fixed to the top surface of the shaft disc (9), and the carbon plate body is installed on the inner wall of the circular frame, and the circular frame is used to stably support the carbon plate body.

4. The cascade refrigeration unit for pharmaceutical intermediates according to claim 3, characterized in that: The U-shaped tube (6) is located between the two air pumps (4), the exhaust pipe (8) is located in front of the evaporator (1), and the coil frame (11) is located directly below the U-shaped tube (6).

5. The cascade refrigeration unit for pharmaceutical intermediates according to claim 4, characterized in that: The top surface of the ring frame (11) is provided with a sterilizing device (13), and the sterilizing device (13) is used to kill bacteria in the cold air; An air fan device (14) is provided on the top of the outer wall of the sterilizing device (13), and the air fan device (14) is used to fan the cold air accumulated above the interior of the cold tank (7).

6. The cascade refrigeration unit for pharmaceutical intermediates according to claim 5, characterized in that: The sterilizing device (13) includes a transverse plate (131), the transverse plate (131) is fixed on the top surface of the ring frame (11), and a circular cover (132) is fixed in the middle of the bottom surface of the transverse plate (131); A purple light lamp (133), wherein the purple light lamp (133) is fixedly mounted on the top inner portion of the circular cover (132); The hole cylinder (134) is installed on the inner wall of the circular cover (132), and the outer wall of the hole cylinder (134) is provided with a plurality of circular holes. The ultraviolet rays irradiated by the purple light lamp (133) are used to kill bacteria in the cold air.

7. The cascade refrigeration unit for pharmaceutical intermediates according to claim 6, characterized in that: Two L-shaped plates (135) are fixed to the outer wall of the circular cover (132), and a thin rod (136) is fixed to the bottom surface of each of the L-shaped plates (135). A spring (137) is fixed to the bottom end of each of the thin rods (136). One end of the spring (137) away from the thin rod (136) is fixedly connected to the top surface of the shaft disc (9). The thin rod (136) supports the circular cover (132) through the elastic force compressed by the spring (137), thereby reducing the amplitude of the circular cover (132) when it rotates.

8. The cascade refrigeration unit for pharmaceutical intermediates according to claim 7, characterized in that: The circular cover (132) is located in the middle of the ring frame (11), the purple light lamp (133) is suspended in the middle of the hole cylinder (134), the hole cylinder (134) is suspended above the shaft disc (9), and the L-shaped plate (135) is located below the horizontal plate (131).

9. The cascade refrigeration unit for pharmaceutical intermediates according to claim 8, characterized in that: The fan device (14) includes a circular frame (141), the circular frame (141) is fixed to the top of the outer wall of the thin rod (136), and a slanted plate (142) is fixed to the top surface of the circular frame (141), and the slanted plate (142) is in an inverted eight-shaped shape; A long rod (143), the long rod (143) passing through and fixed on a side of the two inclined plates (142) close to each other, the long rod (143) being used to support the inclined plates (142); The arc-shaped fan plates (144) are respectively fixed to one end of the two inclined plates (142) away from the circular frame (141), and the arc-shaped fan plates (144) fan the cold air above the interior of the cold tank (7).

10. The cascade refrigeration unit for pharmaceutical intermediates according to claim 9, characterized in that: Two ring blocks (145) are fixed to the outer wall of the long rod (143), a wide plate (146) is fixed to the top surface of the ring block (145), and a temperature detector (147) is fixed to the top surface of the wide plate (146). The temperature detector (147) is used to monitor the coldness of the cold air in the cold tank (7).

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