Injection water preparation device and pharmaceutical device

Abstract

The utility model discloses an injection water preparation device and a pharmaceutical device. The injection water preparation device comprises a hot pressing system and a water source heat pump unit, wherein the hot pressing system is configured to prepare injection water by using purified water; and the water source heat pump unit is connected with the hot-pressing system, and the water source heat pump unit is configured to heat purified water in the hot-pressing system by utilizing waste heat of waste liquid discharged by the hot-pressing system. The water source heat pump unit is connected with the hot-pressing system, and the water source heat pump unit heats purified water in the hot-pressing system through waste liquid waste heat discharged by the hot-pressing system, so that the waste liquid waste heat utilization rate is increased, and the temperature of the purified water in the hot-pressing system is increased; the consumption of industrial steam in the process of preparing the injection water by using the purified water by the hot-pressing system is reduced, so that the preparation cost of the injection water is reduced.

Description

Technical Field

[0001] The present application relates to the field of pharmaceutical preparation technology, and in particular to an injection water preparation device and a pharmaceutical preparation device. Background Art

[0002] Water for injection (WFI) is usually distilled water or deionized water obtained by distillation, so it is also called double distilled water. Water for injection is an important medium in the production of injections, which is usually prepared into liquid medicine with raw materials and excipients.

[0003] At present, the production methods of water for injection are mainly multi-effect distillation and hot pressure distillation. Hot pressure distillation is the use of hot pressure distillation machines to produce water for injection. Its principle is to use mechanical steam recompression to produce water for injection. A large amount of industrial steam is used in the production process, and the waste heat of the waste liquid generated by hot pressure distillation is not effectively utilized, resulting in high preparation costs for water for injection. Summary of the invention

[0004] Based on this, the present application provides an injection water preparation device and a pharmaceutical device, which can effectively utilize the waste heat of waste liquid, reduce industrial steam consumption, and reduce the preparation cost of injection water.

[0005] An embodiment of the first aspect of the present application provides a device for preparing water for injection, comprising a hot pressing system and a water source heat pump unit, wherein the hot pressing system is configured to prepare water for injection using purified water; the water source heat pump unit is connected to the hot pressing system, and the water source heat pump unit is configured to use the waste heat of waste liquid discharged from the hot pressing system to heat the purified water in the hot pressing system.

[0006] In one of the embodiments, the water source heat pump unit is connected to the heat pressure system through a pipeline to form a circulation loop, and the circulation loop is used to allow the purified water from the heat pressure system to flow back to the heat pressure system after heat exchange and temperature increase in the water source heat pump unit; the water source heat pump unit is connected to the first waste liquid outlet of the heat pressure system.

[0007] In one of the embodiments, a reverse osmosis system is further included; the reverse osmosis system is connected to the heat pressure system, and the reverse osmosis system is used to prepare purified water using raw water and supply it to the heat pressure system.

[0008] In one of the embodiments, the water source heat pump unit is connected to the reverse osmosis system, and the water source heat pump unit is also configured to use the waste heat of the waste liquid discharged from the reverse osmosis system to heat the purified water in the heat pressure system.

[0009] In one of the embodiments, it also includes a first water tank, which is connected to the heat pressure system and the reverse osmosis system, and is used to mix the waste liquid discharged from the heat pressure system and the reverse osmosis system; the second liquid outlet of the first water tank is connected to the water source heat pump unit.

[0010] In one of the embodiments, a water pump is further included, and the second liquid outlet of the first water tank is connected to the water source heat pump unit through the water pump.

[0011] In one embodiment, a second liquid inlet is provided on the first water tank, and the second liquid inlet is connected to the first waste liquid outlet of the hot pressing system and the second waste liquid outlet of the reverse osmosis system through a pipeline, and a control valve is provided at the second liquid inlet.

[0012] In one embodiment, the first water tank is further provided with an overflow port; a control valve is provided at the overflow port; and / or, the first water tank is further provided with a spare liquid inlet, and a control valve is provided at the spare liquid inlet.

[0013] In one of the embodiments, the water source heat pump unit includes one water source heat pump, or the water source heat pump unit includes a plurality of water source heat pumps arranged in series.

[0014] An embodiment of the second aspect of the present application provides a pharmaceutical device, comprising the device for preparing water for injection as described in any one of the first aspects.

[0015] The above-mentioned injection water preparation device connects the water source heat pump unit with the hot pressing system. The water source heat pump unit uses the waste heat of the waste liquid discharged from the hot pressing system to heat the purified water in the hot pressing system, thereby improving the utilization rate of the waste heat of the waste liquid, increasing the temperature of the purified water in the hot pressing system, and reducing the consumption of industrial steam in the process of using purified water to prepare injection water by the hot pressing system, thereby reducing the preparation cost of injection water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic structural diagram of an injection water preparation device in one embodiment of the present application.

[0017] Description of reference numerals:

[0018] 10. Water for injection preparation device;

[0019] 110. hot pressing system; 111. first waste liquid discharge outlet;

[0020] 120, water source heat pump unit; 121, water source heat pump; 121a, first water source heat pump; 121b, second water source heat pump; 1211, evaporator; 1212, condenser; 122, first liquid inlet; 123, first liquid outlet;

[0021] 130. Circulation loop;

[0022] 140. Reverse osmosis system; 141. Second waste liquid outlet;

[0023] 150, first water tank; 151, second liquid outlet; 152, second liquid inlet; 153, overflow port; 154, spare liquid inlet;

[0024] 160. Water pump;

[0025] 170. Control valve;

[0026] 180. Drainage pipe. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be a connection between two elements or an interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0033] Water for injection (WFI) is usually distilled water or deionized water obtained by distillation, so it is also called double distilled water. Water for injection is an important medium in the production of injections, which is usually prepared into liquid medicine with raw materials and excipients.

[0034] At present, the production methods of water for injection are mainly multi-effect distillation and hot-pressing distillation. Hot-pressing distillation is to produce water for injection using a hot-pressing distilled water machine. Its principle is to produce water for injection by mechanical steam recompression. A large amount of industrial steam is used in the production process. The industrial steam is used to exchange heat with purified water to turn the organic matter and impurities in the purified water into gaseous state, realize evaporation and separation, and improve the purity of purified water. The industrial steam is cooled and condensed into water and then discharged directly. The waste heat is not effectively utilized, resulting in high preparation cost of water for injection.

[0035] Based on the above technical problems, the present application provides an injection water preparation device and a pharmaceutical device, which can effectively utilize the waste heat of waste liquid, reduce industrial steam consumption, and reduce the preparation cost of injection water.

[0036] Fig. 1 shows a schematic diagram of the structure of an injection water preparation device in an embodiment of the present application. Referring to Fig. 1, an embodiment of the first aspect of the present application provides an injection water preparation device 10, comprising a hot pressing system 110 and a water source heat pump unit 120, the hot pressing system 110 is configured to prepare injection water using purified water; the water source heat pump unit 120 is connected to the hot pressing system 110, and the water source heat pump unit 120 is configured to heat the purified water in the hot pressing system 110 using the waste heat of the waste liquid discharged from the hot pressing system 110.

[0037] It should be noted that the hot pressing system 110 includes a hot pressing water distillation machine system.

[0038] The injection water preparation device 10 provided in the embodiment of the present application connects the water source heat pump unit 120 to the hot pressing system 110. The water source heat pump unit 120 uses the waste heat of the waste liquid discharged from the hot pressing system 110 to heat the purified water in the hot pressing system 110, thereby improving the utilization rate of the waste heat of the waste liquid, increasing the temperature of the purified water in the hot pressing system 110, and reducing the consumption of industrial steam in the process of using purified water to prepare injection water by the hot pressing system 110, thereby reducing the preparation cost of injection water.

[0039] As shown in FIG1 , in one embodiment, the water source heat pump unit 120 is connected to the heat compression system 110 through a pipeline to form a circulation loop 130, and the circulation loop 130 is used to allow the purified water from the heat compression system 110 to flow back to the heat compression system 110 after heat exchange and temperature increase in the water source heat pump unit 120; the water source heat pump unit 120 is connected to the first waste liquid discharge port 111 of the heat compression system 110. In this way, the water source heat pump unit 120 can conveniently use the waste heat of the waste liquid discharged from the heat compression system 110 to heat the purified water, improve the utilization rate of the waste heat of the waste liquid, and reduce the consumption of industrial steam.

[0040] It is understandable that the water source heat pump unit 120 includes a first liquid inlet 122, and the first liquid inlet 122 of the water source heat pump unit 120 is connected to the first waste liquid outlet 111 of the heat compression system 110 through a pipeline, so that the water source heat pump unit 120 can conveniently recycle the waste heat of the waste liquid of the heat compression system 110. The first waste liquid outlet 111 of the heat compression system 110 includes a steam condensate outlet in the heat compression system 110.

[0041] As shown in FIG1 , in one embodiment, the injection water preparation device 10 further includes a reverse osmosis system 140; the reverse osmosis system 140 is connected to the hot pressing system 110, and the reverse osmosis system 140 is used to prepare purified water using raw water and supply it to the hot pressing system 110. In this way, the reverse osmosis system 140 and the hot pressing system 110 cooperate to continuously purify raw water into injection water, thereby improving the preparation efficiency of injection water.

[0042] It is understood that the reverse osmosis system 140 may be a RO reverse osmosis water treatment system.

[0043] Furthermore, the injection water preparation device 10 further includes a second water tank (not shown in the figure), which is connected to the reverse osmosis system 140 and is used to contain purified water prepared by the reverse osmosis system 140. The second water tank is also connected to the hot pressing system 110. Specifically, the second water tank can be connected to the hot pressing system 110 through a water pump and a pipeline (not shown in the figure) to facilitate the supply of purified water to the hot pressing system 110.

[0044] As shown in FIG. 1 , in one embodiment, the water source heat pump unit 120 is connected to the reverse osmosis system 140, and the water source heat pump unit 120 is also configured to utilize the waste heat of the waste liquid discharged from the reverse osmosis system 140 to heat the purified water in the hot pressing system 110. In this way, the utilization rate of the waste heat of the waste liquid can be further improved, the consumption of industrial steam can be reduced, and the preparation cost of water for injection can be reduced.

[0045] It is understandable that the reverse osmosis system 140 includes a second waste liquid outlet 141, which is also the drain outlet of the reverse osmosis system 110, and the first liquid inlet 122 of the water source heat pump unit 120 is connected to the second waste liquid outlet 141 through a pipeline. In this way, the water source heat pump unit 120 can conveniently recycle the waste heat of the waste liquid of the reverse osmosis system 140.

[0046] As shown in Figure 1, in one embodiment, the injection water preparation device 10 also includes a first water tank 150, which is connected to the hot pressing system 110 and the reverse osmosis system 140. The first water tank 150 is used to mix the waste liquid discharged from the hot pressing system 110 and the reverse osmosis system 140; the second liquid outlet 151 of the first water tank 150 is connected to the water source heat pump unit 120.

[0047] It should be noted that, in order to protect the water source heat pump unit 120 and ensure the service life of the water source heat pump unit 120, the water inlet temperature of the water source heat pump unit 120 (that is, the water temperature at the water inlet of the evaporator 1211 of the first water source heat pump 121a) is usually limited. When the water inlet temperature is too high, it is easy to cause damage to the water source heat pump unit 120 and affect the service life of the water source heat pump unit 120; when the water inlet temperature is too low, the water source heat pump unit 120 will not operate due to the self-protection mechanism.

[0048] Usually, the temperature of the waste liquid discharged from the heat pressure system 110 is relatively high, and the temperature of the waste liquid discharged from the reverse osmosis system 140 is relatively low. In this embodiment, by setting the first water tank 150, the first water tank 150 is connected to the heat pressure system 110 and the reverse osmosis system 140, and the waste liquid discharged from the heat pressure system 110 and the reverse osmosis system 140 is mixed by the first water tank 150, so that the temperature of the mixed waste liquid entering the water source heat pump unit 120 can meet the water inlet temperature of the water source heat pump unit 120 (that is, the water temperature at the water inlet of the evaporator 1211 of the first water source heat pump 121a), avoiding damage to the water source heat pump unit 120 due to excessively high temperature, and avoiding low waste heat utilization rate of the waste liquid due to excessively low temperature.

[0049] As shown in FIG1 , in one embodiment, a second liquid inlet 152 is provided on the first water tank 150, and the second liquid inlet 152 is connected to the first waste liquid outlet 111 of the hot pressing system 110 and the second waste liquid outlet 141 of the reverse osmosis system 140 through a pipeline, and a control valve 170 is provided at the second liquid inlet 152. The opening or closing of the second liquid inlet 152 can be conveniently controlled by the control valve 170, so that the connection or disconnection of the second liquid inlet 152 of the first water tank 150 with the first waste liquid outlet 111 of the hot pressing system 110 and the second waste liquid outlet 141 of the reverse osmosis system 140 can be conveniently controlled, thereby improving the safety and reliability of the injection water preparation device 10.

[0050] As shown in FIG1 , in one embodiment, an overflow port 153 is further provided on the first water tank 150; a control valve 170 is provided at the overflow port 153. By providing the overflow port 153, the water level in the first water tank 150 can be guaranteed, and the opening or closing of the overflow port 153 can be conveniently controlled by the control valve 170, so as to avoid accidental overflow of the mixed waste liquid in the first water tank 150 and reduce environmental pollution.

[0051] As shown in FIG1 , in one embodiment, a spare liquid inlet 154 is also provided on the first water tank 150, and a control valve (not shown in the figure) is provided at the spare liquid inlet 154. When the second liquid inlet 152 is blocked or other problems occur, the spare liquid inlet 154 can be connected to the first waste liquid outlet 111 of the hot pressing system 110 and the second waste liquid outlet 141 of the reverse osmosis system 140 to ensure the normal operation of the injection water preparation device 10; in addition, the spare liquid inlet 154 can also be used as a pressure relief port to ensure that the internal pressure of the first water tank 150 is within a safe range. In addition, the spare liquid inlet 154 can be conveniently controlled to be opened or closed by the control valve.

[0052] As shown in Fig. 1, in one embodiment, the injection water preparation device 10 further includes a water pump 160, and the second liquid outlet 151 of the first water tank 150 is connected to the water source heat pump unit 120 through the water pump 160. In this way, the water pump 160 can be used to transport the mixed waste liquid in the first water tank 150 to the water source heat pump unit 120, thereby improving the operating efficiency of the entire injection water preparation device 10.

[0053] Specifically, the water pump 160 may be a centrifugal water pump.

[0054] In one embodiment, the water source heat pump unit 120 includes a water source heat pump 121. The water source heat pump 121 is composed of a compressor, an evaporator 1211, a condenser 1212, an expansion valve, various refrigeration pipe accessories and an electrical control system. The connection and installation between the components of the water source heat pump 121 belong to conventional technical means in the field, and will not be described in detail here.

[0055] Furthermore, the water source heat pump unit 120 includes a water source heat pump 121, and the water inlet of the evaporator 1211 of the water source heat pump 121 serves as the first liquid inlet 122 of the water source heat pump unit 120; the water inlet and the water outlet of the condenser 1212 of the water source heat pump 121 are connected to the heat pressure system 110 through pipelines to form a circulation loop 130; the water outlet of the evaporator 1211 of the water source heat pump 121 serves as the first liquid outlet 123 of the water source heat pump unit 120.

[0056] In one embodiment, the water source heat pump unit 120 may include a plurality of water source heat pumps 121 arranged in series. The number of water source heat pumps 121 in the water source heat pump unit 120 may be set according to actual needs.

[0057] As shown in FIG1 , further, the water source heat pump unit 120 includes a first water source heat pump 121a and a second water source heat pump 121b connected in series; the water outlet of the evaporator 1211 of the first water source heat pump 121a is connected to the water inlet of the evaporator 1211 of the second water source heat pump 121b, and the water outlet of the condenser 1212 of the first water source heat pump 121a is connected to the water inlet of the condenser 1212 of the second water source heat pump 121b, so that the first water source heat pump 121a and the second water source heat pump 121b are connected in series; the water inlet of the evaporator 1211 of the first water source heat pump 121a serves as the first liquid inlet 122 of the water source heat pump unit 120; the water inlet of the condenser 1212 of the first water source heat pump 121a and the water outlet of the condenser 1212 of the second water source heat pump 121b are connected to the heat pressure system 110 through a pipeline to form a circulation loop 130; the water outlet of the evaporator 1211 of the second water source heat pump 121b serves as the first liquid outlet 123 of the water source heat pump unit 120.

[0058] As shown in FIG1 , in one embodiment, the water inlet and outlet of the evaporator 1211 of the water source heat pump unit 120 and the water inlet and outlet of the condenser 1212 are all provided with a control valve 170. Exemplarily, the water inlet and outlet of the evaporator 1211 and the condenser 1212 of the first water source heat pump 121a are all provided with a control valve 170, and the water inlet and outlet of the evaporator 1211 and the condenser 1212 of the second water source heat pump 121b are all provided with a control valve 170. In this way, the flow of the first water source heat pump 121a and the second water source heat pump 121b can be controlled by the control valve 170, so as to adjust the heat exchange temperature according to actual needs.

[0059] Further, the control valve 170 may be a butterfly valve.

[0060] As shown in FIG1 , in one embodiment, the injection water preparation device 10 further includes a drainage pipeline 180, which can be connected to the overflow port 153 of the first water tank 150, and the drainage pipeline 180 is used to discharge the water in the first water tank 150. When the amount of water stored in the first water tank 150 is excessive and overflows, it can be discharged through the drainage pipeline 180 to avoid excessive pressure in the first water tank 150 due to excessive water storage, so as to protect the first water tank 150.

[0061] As shown in FIG. 1 , in one embodiment, the first liquid outlet 123 of the water source heat pump unit 120 is connected to the drainage pipe 180 , so that water can be discharged from the water source heat pump unit 120 to facilitate subsequent cleaning of the water source heat pump unit 120 .

[0062] An embodiment of the second aspect of the present application provides a pharmaceutical device, comprising the device for preparing water for injection 10 as described in any one of the first aspects.

[0063] The pharmaceutical device provided in the embodiment of the present application includes an injection water preparation device 10. By connecting a water source heat pump unit 120 to a hot pressing system 110, the water source heat pump unit 120 uses the waste heat of the waste liquid discharged from the hot pressing system 110 to heat the purified water in the hot pressing system 110, thereby improving the utilization rate of the waste heat of the waste liquid, increasing the temperature of the purified water in the hot pressing system 110, reducing the consumption of industrial steam in the process of preparing injection water by the hot pressing system 110 using purified water, reducing the preparation cost of injection water, and thereby reducing the pharmaceutical cost of the pharmaceutical device.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A device for preparing water for injection, characterized in that: include: a thermocompression system configured to prepare water for injection using purified water; A water source heat pump unit, the water source heat pump unit is connected to the heat pressure system, and the water source heat pump unit is configured to heat the purified water in the heat pressure system using the waste heat of the waste liquid discharged from the heat pressure system; The water source heat pump unit is connected to the heat pressure system through a pipeline to form a circulation loop, and the circulation loop is used to allow the purified water from the heat pressure system to flow back to the heat pressure system after heat exchange and temperature increase in the water source heat pump unit; the water source heat pump unit includes a first liquid inlet, and the first liquid inlet is connected to a first waste liquid outlet of the heat pressure system; The water source heat pump unit comprises a water source heat pump; the water inlet of the evaporator of the water source heat pump serves as the first liquid inlet of the water source heat pump unit, and the water inlet and the water outlet of the condenser of the water source heat pump are connected with the heat pressure system through pipelines to form a circulation loop; Alternatively, the water source heat pump unit includes a first water source heat pump and a second water source heat pump which are connected in series; the water outlet of the evaporator of the first water source heat pump is connected to the water inlet of the evaporator of the second water source heat pump, and the water outlet of the condenser of the first water source heat pump is connected to the water inlet of the condenser of the second water source heat pump, so that the first water source heat pump and the second water source heat pump are connected in series; the water inlet of the evaporator of the first water source heat pump serves as the first liquid inlet of the water source heat pump unit; the water inlet of the condenser of the first water source heat pump and the water outlet of the condenser of the second water source heat pump are connected to the heat pressure system through a pipeline to form a circulation loop.

2. The device for preparing water for injection according to claim 1, characterized in that: It also includes a reverse osmosis system; the reverse osmosis system is connected to the heat pressure system, and the reverse osmosis system is used to prepare purified water using raw water and supply it to the heat pressure system.

3. The device for preparing water for injection according to claim 2, characterized in that: The water source heat pump unit is connected to the reverse osmosis system, and the water source heat pump unit is also configured to use the waste heat of the waste liquid discharged from the reverse osmosis system to heat the purified water in the heat pressure system.

4. The device for preparing water for injection according to claim 3, characterized in that: It also includes a first water tank, which is connected to the heat pressure system and the reverse osmosis system. The first water tank is used to mix the waste liquid discharged from the heat pressure system and the reverse osmosis system; the second liquid outlet of the first water tank is connected to the water source heat pump unit.

5. The device for preparing water for injection according to claim 4, characterized in that: It also includes a water pump, and the second liquid outlet of the first water tank is connected to the water source heat pump unit through the water pump.

6. The device for preparing water for injection according to claim 4, characterized in that: The first water tank is provided with a second liquid inlet, which is connected to the first waste liquid outlet of the hot pressing system and the second waste liquid outlet of the reverse osmosis system through a pipeline, and a control valve is provided at the second liquid inlet.

7. The device for preparing water for injection according to claim 4, characterized in that: The first water tank is also provided with an overflow port; a control valve is provided at the overflow port; and / or, the first water tank is also provided with a spare liquid inlet, and a control valve is provided at the spare liquid inlet.

8. A pharmaceutical device, characterized in that: A device for preparing water for injection comprising any one of claims 1 to 7.

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