Cascade refrigeration unit for pharmaceutical intermediates

Abstract

The application discloses a cascade refrigerating unit for medical intermediates and relates to the technical field of cascade refrigerating machines.The cascade refrigerating unit comprises two groups of evaporators, cold cylinders are arranged above the evaporators, two air pumps are arranged above the cold cylinders, cold air pipes are respectively penetrated through and fixed to the sides of the air pumps away from each other, one end of the cold air pipe away from the air pump is penetrated through and fixedly connected with the top of the outer wall of the cold cylinder, L-shaped pipes are respectively fixed to the top of the outer wall of the air pump, the bottom ends of the L-shaped pipes are respectively penetrated through and fixedly connected with the top of the evaporator, a U-shaped pipe is fixed to the top surface of the cold cylinder, a cold tank is fixed to the bottom end of the U-shaped pipe, an exhaust pipe is arranged at the bottom of the left side of the cold tank, a motor is fixed to the bottom surface of the cold tank, and the cold tank is located in front of the evaporator.The application filters impurities in the cold air through the activated carbon plate, so that the problem that the synthesis effect of the medical intermediates is poor due to the impurities contained in the cold air is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cascade refrigeration machines, in particular to a cascade refrigeration unit for pharmaceutical intermediates. BACKGROUND

[0002] Pharmaceutical intermediates are semi-finished products in the process of drug synthesis, usually referring to traditional Chinese medicine raw materials. Many synthesis reactions, crystallization processes (such as low-temperature crystallization to improve purity), and solvent recovery (such as low-boiling-point solvents) of pharmaceutical intermediates need to be carried out at temperatures of -40℃ to -80℃ or even lower. The main function of the cascade refrigeration unit for pharmaceutical intermediates is to manufacture equipment for storing pharmaceutical intermediates with cold air, achieve deep refrigeration, and ensure the quality and effectiveness of pharmaceutical intermediates.

[0003] The patent CN220083359U discloses a cascade refrigeration unit for pharmaceutical intermediates, which includes a box body, an evaporator is connected to one side wall of the box body, a conveying pipe is connected to one side wall of the evaporator, a low-temperature box assembly is installed at the other end of the conveying pipe, the low-temperature box assembly includes a low-temperature box body, a chute is formed at the bottom edge of the low-temperature box body, a baffle is arranged in the low-temperature box body, a cavity is formed between the low-temperature box body and the baffle, a plurality of groups of storage plates are arranged on the baffle, a plurality of groups of conveying openings are formed in the baffle, an air pump is arranged on the inner wall of the bottom of the low-temperature box body, an opening and closing door structure is arranged on one side wall of the low-temperature box body away from the conveying pipe, and an observation window is installed on one side wall of the opening and closing door structure. This structure avoids the squeezing of stored items due to narrow space and improves the integrity of item storage.

[0004] However, the current cascade refrigeration unit for pharmaceutical intermediates has the following problems: during the continuous refrigeration of pharmaceutical intermediates by the cascade refrigeration unit, impurities in the cold air can easily contaminate the pharmaceutical intermediates, thereby affecting the synthesis effect of the pharmaceutical intermediates. Therefore, we propose a cascade refrigeration unit for pharmaceutical intermediates. SUMMARY

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

[0006] To achieve the above object, the application is implemented by the following technical scheme: 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, a cold air pipe is respectively penetrated and fixed on the side away from each other of the air pump, one end of the cold air pipe away from the air pump is penetrated and fixedly connected with the top of the outer wall of the cold cylinder, an L-shaped pipe is fixedly arranged on the top of the outer wall of the air pump, the bottom end of the L-shaped pipe is penetrated and fixedly connected with the top of the evaporator, a U-shaped pipe is fixed on the top surface of the cold cylinder, a cold tank is fixed on the bottom end of the U-shaped pipe, an exhaust pipe is arranged on the left bottom 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 disc is penetrated and rotatably installed on the bottom end inside the cold tank, the bottom end of the shaft disc is fixedly connected with the top surface of the rotating shaft of the motor, a plurality of activated carbon plates are fixed on the top surface of the shaft disc, a ring frame is fixed on the top surface of the inner wall of the cold tank, a concave ring frame is fixed on the top surface of the activated carbon plate, the outer wall of the concave ring frame is rotatably connected with the inner wall of the ring frame, the L-shaped pipe extracts cold air in the evaporator, the L-shaped pipe is conveyed to the air pump, the air pump inputs the cold air into the cold air pipe, the cold air pipe conveys the cold air into the cold cylinder, the cold cylinder conveys the cold air into the U-shaped pipe, the U-shaped pipe conveys the 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, the ring frame rotates in the concave ring frame, so that the activated carbon plate contacts the cold air in the cold tank in a large area during rotation, and the activated carbon plate is used for filtering impurities in the cold air.

[0007] According to the above technical scheme, one round cover is respectively fixedly installed on the right side of the evaporator, two air ports are respectively arranged on the right side of the round cover, the air ports are used for heat exchange of the evaporator, and one drain pipe is respectively penetrated and fixed on the left and right bottom of the cold cylinder, and the drain pipe is used for discharging condensed water in the cold cylinder.

[0008] According to the above technical scheme, the bottom surface of the cold tank is provided with a supporting leg, the activated carbon plate comprises a back-shaped frame and a carbon plate body, the bottom surface of the back-shaped frame of the activated carbon plate is fixed on the top surface of the shaft disc, the carbon plate body is installed on the inner wall of the back-shaped frame, and the back-shaped frame is used for stably supporting the carbon plate body.

[0009] According to the above technical scheme, the U-shaped pipe is located in the middle of the two air pumps, the exhaust pipe is located in front of the evaporator, and the ring frame is located directly below the U-shaped pipe.

[0010] According to the above technical scheme, the top surface of the ring frame is provided with a sterilization device, the sterilization device is used for killing bacteria in the cold air, the outer wall top of the sterilization device is provided with a fan device, and the fan device is used for fanning the cold air accumulated above the inside of the cold tank.

[0011] According to the technical scheme, the sterilization device comprises a horizontal plate fixed on the top surface of the ring frame, a circular cover fixed on the bottom surface of the horizontal plate, a violet light lamp fixed on the top end of the circular cover, and a hole cylinder fixed on the inner wall of the circular cover, wherein the outer wall of the hole cylinder is provided with a plurality of circular holes.

[0012] According to the technical scheme, the outer wall of the circular cover is fixed with two L-shaped plates, the bottom surface of each L-shaped plate is fixed with a thin rod, the bottom end of each thin rod is fixed with a spring, the end of each spring away from the thin rod is fixedly connected with the top surface of the shaft disc, the L-shaped plate drives the thin rod to rotate forward, the thin rod drives the spring to rotate forward, and the spring rotates with the shaft disc, and the thin rod supports the circular cover through the elastic force of the compressed spring, thereby reducing the amplitude of the rotation of the circular cover.

[0013] According to the technical scheme, the circular cover is located in the middle of the interior of the ring frame, the violet light lamp is suspended in the middle of the interior of the hole cylinder, the hole cylinder is suspended above the shaft disc, and the L-shaped plate is located below the horizontal plate.

[0014] According to the technical scheme, the fan device comprises a hairpin frame fixed on the top of the outer wall of the thin rod, an inclined plate fixed on the top surface of the hairpin frame, a long rod penetrating through and fixed on the side of the two inclined plates close to each other, and an arc-shaped fan plate fixed on the end of the two inclined plates away from the hairpin frame, wherein the long rod is used for supporting the inclined plate, the hairpin frame drives the inclined plate to rotate forward, the inclined plate drives the long rod to rotate forward, the long rod supports the rotation of the inclined plate, the inclined plate drives the arc-shaped fan plate to rotate forward, and the arc-shaped fan plate fans the cold air above the interior of the cold tank.

[0015] According to the technical scheme, the outer wall of the long rod is fixed with two ring blocks, the top surface of each ring block is fixed with a wide plate, and the top surface of each wide plate is fixed with a temperature detector, wherein the ring block drives the wide plate to rotate forward, the wide plate drives the temperature detector to rotate forward, the temperature detector contacts the cold air in the cold tank in a large area during the rotation, and the temperature detector is used for monitoring the cold degree of the cold air in the cold tank.

[0016] The present application provides a cascade refrigeration unit for pharmaceutical intermediates. It has the following advantages:

[0017] (1) The present application is through the evaporator, cold cylinder, cold gas pipe, air pump, L-shaped pipe, U-shaped pipe, cold tank, exhaust pipe, shaft disc, activated carbon plate and ring frame cooperate concave ring frame, L-shaped pipe extraction evaporator cold gas, L-shaped pipe is transported to the air pump, air pump input cold gas into the cold gas pipe, cold gas pipe delivery cold gas into the cold cylinder, cold cylinder delivery cold gas into the U-shaped pipe, U-shaped pipe delivery cold gas into the cold tank, the motor on the cold tank drives the shaft disc forward rotation, the shaft disc drives the activated carbon plate forward rotation, the activated carbon plate drives the ring frame forward rotation, the ring frame rotates in the concave ring frame, so that the activated carbon plate in the process of rotation large area contact cold gas in the cold tank, activated carbon plate filter impurities in the cold gas, prevent the cold gas containing impurities cause the synthesis effect of pharmaceutical intermediates is poor.

[0018] (2) The present application is through the setting of sterilization device, so that the horizontal plate, round cover and purple light cooperate with hole cylinder, the horizontal plate drives the round cover forward rotation, the round cover drives the purple light forward rotation, the round cover drives the hole cylinder forward rotation, the ultraviolet of the purple light is rotated and irradiated in the cold tank through the round hole of the hole cylinder, the round hole of the hole cylinder emits ultraviolet to kill bacteria in the cold gas, prevent the cold gas in the cold tank containing bacteria cause the pharmaceutical intermediates are contaminated by bacteria.

[0019] (3) The present application is through the setting of sterilization device, so that the L-shaped plate and the thin rod cooperate with the spring, the L-shaped plate drives the thin rod forward rotation, the thin rod drives the spring forward rotation, the spring rotates with the shaft disc, so that the thin rod supports the L-shaped plate through the compression elastic force of the spring, the L-shaped plate supports the rotating round cover, prevent the round cover produces strong amplitude and causes the purple light to be easy to vibrate and damage.

[0020] (4) The present application is through the setting of fan device, so that the back-shaped frame, inclined plate and long rod cooperate with arc-shaped fan plate, the back-shaped frame drives the inclined plate forward rotation, the inclined plate drives the long rod forward rotation, the long rod supports the inclined plate rotation, the inclined plate drives the arc-shaped fan plate forward rotation, the arc-shaped fan plate fans the cold gas accumulated above the cold tank in the process of rotation, prevent the cold gas accumulated above the cold tank cause the cold tank to discharge cold effect is poor.

[0021] (5) The present application is through the setting of fan device, so that the ring block and the wide plate cooperate with the temperature detector, the ring block drives the wide plate forward rotation, the wide plate drives the temperature detector forward rotation, the temperature detector large area contact cold gas in the cold tank in the process of rotation, prevent the cold tank discharges cold gas cold degree is not accurate cause the synthesis quality of pharmaceutical intermediates is poor. DRAWINGS

[0022] Figure 1 It is the schematic diagram of the whole application;

[0023] Figure 2 It is the schematic diagram of the internal component of the application;

[0024] Figure 3 It is the sectional view schematic diagram of the cold tank of the application;

[0025] Figure 4A schematic view of the sterilization device of the present application;

[0026] Figure 5 A schematic view of the fan air device of the present application Figure 4 A partial enlarged view of A in the present application;

[0027] Figure 6 A schematic view of the fan air device of the present application

[0028] Figure 7 A partial enlarged view of B in the present application Figure 6

[0029] 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, sterilization device; 131, horizontal plate; 132, round cover; 133, purple light; 134, hole cylinder; 135, L-shaped plate; 136, thin rod; 137, spring; 14, fan air device; 141, back-shaped frame; 142, inclined plate; 143, long rod; 144, arc-shaped fan plate; 145, ring block; 146, wide plate; 147, temperature measurer. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0031] Please refer to Figures 1-7 An embodiment of the present application is: a cascade refrigeration unit for pharmaceutical intermediates, comprising: two groups of evaporators 1, the right side of each evaporator 1 is fixedly installed with a round cover 101, the right side of each round cover 101 is provided with two air ports 102, the air ports 102 are used for heat exchange of the evaporators 1, an upper portion of each evaporator 1 is provided with a cold cylinder 2, the left and right sides of the bottom of each cold cylinder 2 are penetrated and fixedly provided with a drain pipe 201, the drain pipe 201 is used for discharging condensed water in the cold cylinder 2;

[0032] ​The upper portion of the cold cylinder 2 is provided with two air pumps 4, the sides of the air pumps 4 away from each other are respectively penetrated and fixed with cold air pipes 3, the ends of the cold air pipes 3 away from the air pumps 4 are penetrated and fixedly connected with the top outer wall of the cold cylinder 2, the top outer walls of the air pumps 4 are respectively fixed with L-shaped pipes 5, the bottom ends of the L-shaped pipes 5 are respectively penetrated and fixedly connected with the top of the evaporator 1, a U-shaped pipe 6 is fixed on the top surface of the cold cylinder 2, the U-shaped pipe 6 is located in the middle of the two air pumps 4, the bottom end of the U-shaped pipe 6 is fixed with a cold tank 7, the bottom surface of the cold tank 7 is provided with supporting legs, the left bottom of the cold tank 7 is provided with an exhaust pipe 8, the exhaust pipe 8 is located in front of the evaporator 1, the bottom surface of the cold tank 7 is fixed with a motor, the cold tank 7 is located in front of the evaporator 1, a shaft disc 9 is penetrated and rotatably installed at the bottom end inside the cold tank 7, the bottom end of the shaft disc 9 is fixedly connected with the top surface of the rotating shaft of the motor, a plurality of activated carbon plates 10 are fixed on the top surface of the shaft disc 9, the activated carbon plate 10 comprises a back-shaped frame and a carbon plate body, the bottom surface of the back-shaped frame of the activated carbon plate 10 is fixed on the top surface of the shaft disc 9, the carbon plate body is installed on the inner wall of the back-shaped frame, the back-shaped frame is used for stably supporting the carbon plate body, a ring frame 11 is fixed on the inner wall of the cold tank 7, the ring frame 11 is located directly below the U-shaped pipe 6, a concave ring frame 12 is fixed on the top surface of the activated carbon plate 10, the outer wall of the concave ring frame 12 is rotatably connected with the inner wall of the ring frame 11, and the activated carbon plate 10 is used for filtering impurities in the cold air.

[0033] When the device is used, the operator starts the evaporator 1 and the air pump 4, the circular cover 101 covers the evaporator 1, the evaporator 1 exchanges heat through the air port 102 to produce cold air, the L-shaped pipe 5 extracts the cold air in the evaporator 1, the L-shaped pipe 5 is transported to the air pump 4, the air pump 4 inputs the cold air into the cold air pipe 3, 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 pipe 6, the U-shaped pipe 6 transports the cold air into the cold tank 7, the operator starts the motor on the cold tank 7, the rotating shaft of the motor starts to rotate, the rotating shaft of the motor drives the shaft disc 9 to rotate, the shaft disc 9 rotates in the cold tank 7, the shaft disc 9 drives the activated carbon plate 10 to rotate, the activated carbon plate 10 drives the ring frame 11 to rotate, 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 in a large area in the process of rotation, the activated carbon plate 10 filters impurities in the cold air, the exhaust pipe 8 discharges the cold air into the refrigerator, so that the medical intermediates can be continuously refrigerated in the cold air without impurities, thereby avoiding the problem that when the cascade refrigeration unit continuously refrigerates the medical intermediates, the cold air contains impurities, which causes the synthesis effect of the medical intermediates to be poor.

[0034] The top surface of the ring frame 11 is provided with a sterilization device 13, the sterilization device 13 is used for killing bacteria in the cold air, the outer wall top of the sterilization device 13 is provided with a fan device 14, and the fan device 14 is used for fanning the cold air accumulated inside the cold tank 7.

[0035] Working principle: L-shaped pipe 5 extracts cold air in the evaporator 1, L-shaped pipe 5 is transported 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 pipe 6, the U-shaped pipe 6 transports cold air into the cold tank 7, the rotating shaft of the motor drives the shaft disc 9 to rotate, the shaft disc 9 rotates in the cold tank 7, the shaft disc 9 drives the active carbon plate 10 to rotate, the active carbon plate 10 drives the ring frame 11 to rotate in the concave ring frame 12.

[0036] Please refer to Figures 1-7 On the basis of the above embodiment, in another embodiment of the application, the sterilization device 13 includes a horizontal plate 131 fixed on the top surface of the ring frame 11, a circular cover 132 fixed on the bottom surface of the horizontal plate 131, a purple light lamp 133 fixedly installed at the top end inside the circular cover 132, a hole cylinder 134 installed on the inner wall of the circular cover 132, a plurality of circular holes are formed on the outer wall of the hole cylinder 134, the circular cover 132 is located in the middle of the inside of the ring frame 11, the purple light lamp 133 is suspended in the middle of the inside of the hole cylinder 134, the hole cylinder 134 is suspended above the shaft disc 9, and the ultraviolet rays emitted by the purple light lamp 133 are used for killing bacteria in the cold air;

[0037] While the active carbon plate 10 drives the ring frame 11 to rotate, the ring frame 11 drives the horizontal plate 131 to rotate, the horizontal plate 131 drives the circular cover 132 to rotate, the circular cover 132 drives the purple light lamp 133 to rotate, the circular cover 132 drives the hole cylinder 134 to rotate, the operator starts the purple light lamp 133, the purple light lamp 133 emits ultraviolet rays, the ultraviolet rays of the purple light lamp 133 rotate and irradiate in the cold tank 7 through the circular holes of the hole cylinder 134, so that the circular holes of the hole cylinder 134 emit ultraviolet rays to kill bacteria in the cold air, thereby avoiding the problem that the cold air in the cold tank 7 contains bacteria when the cascade refrigeration unit continuously refrigerates the pharmaceutical intermediates, causing the pharmaceutical intermediates to be contaminated by bacteria.

[0038] The outer wall of the circular cover 132 is fixed with two L-shaped plates 135, the L-shaped plates 135 are located below the horizontal plate 131, the bottom surface of each L-shaped plate 135 is fixed with a thin rod 136, the bottom end of each thin rod 136 is fixed with a spring 137, the end of the spring 137 away from the thin rod 136 is fixedly connected with the top surface of the shaft disc 9, and the thin rod 136 supports the circular cover 132 through the elastic force of the compressed spring 137, so as to reduce the amplitude of the rotation of the circular cover 132;

[0039] When the circular cover 132 drives the purple light 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, the thin rod 136 drives the spring 137 to rotate forward, the spring 137 rotates with the shaft disc 9, so that the thin rod 136 supports the L-shaped plate 135 through the compression elastic force of the spring 137, and the L-shaped plate 135 supports the rotating circular cover 132, so that the circular cover 132 does not generate strong amplitude in the rotating process, thereby avoiding the problem that the circular cover 132 generates strong amplitude to cause the purple light 133 to be easily vibrated and damaged when the multi-stage freezing unit continuously refrigerates the pharmaceutical intermediates.

[0040] The fan device 14 comprises a U-shaped frame 141 fixed on the outer wall top of the thin rod 136, an inclined plate 142 fixed on the top surface of the U-shaped frame 141, a long rod 143 penetrating through and fixed on one side of the two inclined plates 142 close to each other, the long rod 143 being used for supporting the inclined plate 142, and an arc-shaped fan plate 144 fixed on the end of the two inclined plates 142 away from the U-shaped frame 141, the arc-shaped fan plate 144 fanning the cold air above the inside of the cold tank 7.

[0041] When the L-shaped plate 135 drives the thin rod 136 to rotate forward, the thin rod 136 drives the U-shaped frame 141 to rotate forward, the U-shaped 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 fanning the cold air accumulated above the cold tank 7 in the rotating process, thereby avoiding the problem that the cold air is accumulated above the cold tank 7 to cause the cold tank 7 to have poor cold air discharging effect when the multi-stage freezing unit continuously refrigerates the pharmaceutical intermediates.

[0042] The outer wall of the long rod 143 is fixed with two ring blocks 145, the top surface of the ring block 145 is fixed with a wide plate 146, and the top surface of the wide plate 146 is fixed with a temperature detector 147, the temperature detector 147 being used for monitoring the cold degree of the cold air in the cold tank 7.

[0043] When 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, the wide plate 146 drives the temperature detector 147 to rotate forward, and the temperature detector 147 contacts the cold air in the cold tank 7 in a large area in the rotating process, so that the temperature detector 147 monitors the cold degree of the cold air in the cold tank 7 in real time, thereby avoiding the problem that the cold tank 7 discharges the cold air with inaccurate cold degree to cause the synthesis quality of the pharmaceutical intermediates to be poor when the multi-stage freezing unit continuously refrigerates the pharmaceutical intermediates.

[0044] Working principle: the horizontal plate 131 is driven by the ring frame 11 to rotate forward, the horizontal plate 131 drives the round cover 132 to rotate forward, the round cover 132 drives the purple light lamp 133 to rotate forward, the round cover 132 drives the hole cylinder 134 to rotate forward, and the ultraviolet rays of the purple light lamp 133 rotate and irradiate in the cold tank 7 through the round hole of the hole cylinder 134;

[0045] The L-shaped plate 135 is driven by the round cover 132 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, the spring 137 rotates with the shaft disc 9, the thin rod 136 supports the L-shaped plate 135 through the compression elastic force of the spring 137, and the L-shaped plate 135 supports the rotating round cover 132.

[0046] The thin rod 136 drives the back-shaped frame 141 to rotate forward, the back-shaped 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 rotation of the inclined plate 142, simultaneously, the inclined plate 142 drives the arc-shaped fan plate 144 to rotate forward, and the arc-shaped fan plate 144 fans the cold air accumulated above the cold tank 7 in the rotating process.

[0047] The long rod 143 drives the ring block 145 to rotate forward, the ring block 145 drives the wide plate 146 to rotate forward, the wide plate 146 drives the temperature measurer 147 to rotate forward, the temperature measurer 147 contacts the cold air in the cold tank 7 in a large area in the rotating process, and the temperature measurer 147 monitors the cold degree of the cold air in the cold tank 7 in real time.

[0048] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A cascade refrigeration unit for pharmaceutical intermediates, comprising: Two sets of evaporators (1) are provided. 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 side of the air pumps (4) that are far away from each other. The end of the cold air pipe (3) that is far away from the air pump (4) is connected to the top of the outer wall of the cold cylinder (2) and fixed. L-shaped pipes (5) are respectively fixed on the top of the outer wall of the air pumps (4). The bottom end of the L-shaped pipes (5) is respectively connected to the top of the evaporator (1) and fixed. U-shaped tube (6), the U-shaped tube (6) is fixed on the top surface of the cold cylinder (2), the bottom end of the U-shaped tube (6) is fixed with a cold tank (7), the bottom left side of the cold tank (7) is provided with an exhaust pipe (8), the bottom surface of the cold tank (7) is fixed with a motor, and the cold tank (7) is located in front of the evaporator (1). A shaft disc (9) is installed through and rotatably inside the bottom of the cold tank (7). The bottom of the shaft disc (9) is fixedly connected to the top surface of the motor shaft. Several activated carbon plates (10) are fixed on 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 on 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.

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). Two air ports (102) are opened on the right side of the round cover (101). The air ports (102) are used for heat exchange in the evaporator (1). A drain pipe (201) is fixed through the bottom of both the left and right sides of the cold cylinder (2). The drain pipe (201) is used to drain the condensate in the cold cylinder (2).

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

4. A 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 ring frame (11) is located directly below the U-shaped tube (6).

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

6. A cascade refrigeration unit for pharmaceutical intermediates according to claim 5, characterized in that: The sterilization device (13) includes a horizontal plate (131), which is fixed on the top surface of the frame (11), and a round cover (132) is fixed in the middle of the bottom surface of the horizontal plate (131). Ultraviolet lamp (133), the ultraviolet lamp (133) is fixedly installed at the top inside the dome (132); The perforated tube (134) is installed on the inner wall of the circular cover (132). The outer wall of the perforated tube (134) has several circular holes. The ultraviolet light irradiated by the ultraviolet lamp (133) is used to kill bacteria in the cold air.

7. A 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). 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 disk (9). The thin rod (136) supports the circular cover (132) through the elastic force of the spring (137) compression, thereby reducing the amplitude of the circular cover (132) when it rotates.

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

9. A cascade refrigeration unit for pharmaceutical intermediates according to claim 8, characterized in that: The fan device (14) includes a spiral frame (141), which is fixed to the top of the outer wall of the thin rod (136). A sloping plate (142) is fixed to the top surface of the spiral frame (141), and the sloping plate (142) is in the shape of an inverted V. A long rod (143) passes through and is fixed to one side of two inclined plates (142) that are close to each other, and the long rod (143) is used to support the inclined plates (142). Arc-shaped fan plate (144) is fixed to one end of two inclined plates (142) away from the spiral frame (141), and the arc-shaped fan plate (144) fans the cold air inside the cold tank (7).

10. A 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). A thermometer (147) is fixed to the top surface of the wide plate (146). The thermometer (147) is used to monitor the coldness of the cold air in the cold tank (7).

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