Biological experiment safety cabinet

Abstract

The utility model provides a biological experiment safety cabinet, which relates to the technical field of experiment safety cabinets and comprises a cabinet body, an experiment cavity is arranged in the cabinet body, a pipeline cavity is arranged in the cabinet body, a main filter cavity is arranged below the pipeline cavity, a standby filter cavity is arranged on one side of the main filter cavity, a main filter is arranged in the main filter cavity, and a standby filter is arranged in the standby filter cavity. A disinfection cavity is formed below the experiment cavity. According to the experimental safety cabinet, through the arrangement of the disinfection assembly, the risk that biological pollutants leak from the safety cabinet to the laboratory environment is reduced, meanwhile, the opportunity that experimenters directly make contact with disinfected objects can be reduced, the possible secondary pollution risk is reduced, through the arrangement of the switching assembly, a standby filter can be rapidly switched, and the safety of the experiment is improved. And the biological protection function of the safety cabinet on operators, samples and the environment is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental safety cabinets, in particular to a biological experimental safety cabinet. Background Art

[0002] A biological safety cabinet is an air purification device specially designed for use in biological laboratories to provide safety protection for experimenters, experimental environments and experimental samples. Its main function is to prevent the bioaerosols that may be generated during the experimental operation from contaminating the operators, the environment and samples, and also to prevent harmful biological factors in the experimental materials from leaking into the external environment. The working principle of the biological safety cabinet is based on laminar airflow technology and the use of high-efficiency filters. The air enters the working area after being filtered, forming a one-way flow to ensure that the contaminated aerosols generated during the experiment are effectively captured and filtered out.

[0003] However, the existing biological experiment safety cabinets still have certain defects when in use. For example, after the biological experiment safety cabinet is used for a long time, a large amount of dust, dirt and other impurities will accumulate on the filter, which can easily cause the filter to be blocked. If the filter suddenly fails or needs to be replaced urgently, most of the existing biological experiment safety cabinets need to be shut down to replace the filter, which will not only cause laboratory operations to be interrupted, affecting the experimental process and research efficiency, but also increase the risk of laboratory exposure to potential biological hazards. In addition, after the existing experimental equipment is disinfected in the safety cabinet, the experimenter needs to manually move it out of the safety cabinet. During this process, the experimenter will directly contact the experimental equipment, and the experimental equipment is likely to be secondary contaminated. Utility Model Content

[0004] The utility model aims to solve the shortcomings existing in the background technology and provides a biological experiment safety cabinet. In order to solve the above problems, the risk of biological contaminants leaking from the safety cabinet to the laboratory environment is reduced by setting a disinfection component, while the opportunity for laboratory personnel to directly contact disinfected items is reduced, reducing the possible risk of secondary contamination. By setting a switching component, the spare filter can be quickly switched to maintain the biological protection function of the safety cabinet for operators, samples and the environment.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a biological experiment safety cabinet, comprising: a cabinet body, an experiment cavity is provided inside the cabinet body, a pipeline cavity is provided inside the cabinet body, a main filter cavity is provided below the pipeline cavity, a spare filter cavity is provided on one side of the main filter cavity, a main filter is provided inside the main filter cavity, a spare filter is provided inside the spare filter cavity, and a disinfection cavity is provided below the experiment cavity; a switching component provided between the experiment cavity and the pipeline cavity, used for switching the spare filter; and a disinfection component provided between the experiment cavity and the disinfection cavity, used for disinfecting experiment instruments.

[0006] Furthermore, the switching component includes: a vacuum pump arranged on the top of the cabinet, an air inlet pipe is provided on one side of the vacuum pump, an air outlet pipe is provided on the bottom of the vacuum pump, one end of the air outlet pipe extends into the pipe cavity and is connected to the main air inlet pipe through a three-way pipe, one end of the main air inlet pipe extends into the main filter cavity, one end of the air outlet pipe is connected to a spare air inlet pipe through a three-way pipe, one end of the spare air inlet pipe extends into the inside of the spare filter cavity, a connecting pipe is arranged between the main filter cavity and the spare filter cavity, a ventilation net b is provided on one side of the main filter cavity, and an exhaust cavity is opened on one side of the inner wall of the experimental cavity.

[0007] Furthermore, a plurality of ultraviolet lamps are provided on the top of the inner wall of the experimental chamber, a bracket is provided on the top of the cabinet, two electric telescopic rods are provided on the top of the bracket, a slot is provided on the top of the cabinet, protective glass is fixedly connected to the bottom ends of the two electric telescopic rods, and the bottom end of the protective glass passes through the slot and extends into the interior of the experimental chamber, sealing strips are provided at the positions where the outer side of the protective glass contacts the experimental chamber and the inner wall of the slot, and a plurality of experimental gloves are provided on one side of the protective glass.

[0008] Furthermore, a filter is provided inside the exhaust cavity, and a ventilation net a is provided on one side of the inner wall of the exhaust cavity.

[0009] Furthermore, the main air intake pipe, the backup air intake pipe and the connecting pipe are all provided with solenoid valves, and a pressure sensor is provided on one side of the inner wall of the main filter chamber.

[0010] Furthermore, the disinfection component includes: a rectangular groove opened at the bottom of the inner wall of the experimental chamber, a top block is provided inside the rectangular groove, an electric push rod is provided on the top of the cabinet, the bottom end of the electric push rod passes through the experimental chamber and is fixedly connected to the top block, the bottom end of the top block is fixedly connected to a connecting block, the bottom of the connecting block is fixedly connected to a base, an electromagnet is provided on the top of the base, sealing rings are provided on the outside of the top block and the base, a water filter basket is provided on the top of the base, a plurality of heating rods are arranged on one side of the inside of the disinfection chamber, an exhaust pipe is provided on the top of the inner wall of the disinfection chamber, and a solenoid valve is provided on the exhaust pipe.

[0011] Furthermore, an iron sheet is provided at the bottom of the water filter basket, a drain pipe is provided on one side of the disinfection chamber, a water chamber is opened on one side of the disinfection chamber, a water inlet pipe is provided on one side of the inner wall of the water chamber, a water pump is provided inside the water chamber, a suction pipe is connected to one side of the water pump, a water outlet pipe is connected to the top of the water pump, one end of the water outlet pipe extends into the disinfection chamber and is connected to a nozzle.

[0012] The utility model provides a biological experiment safety cabinet, which has the following beneficial effects:

[0013] The utility model has the advantages that, through the provision of the disinfection component, the experimental apparatus made of glass or metal can be fully disinfected, reducing the risk of biological contaminants leaking from the safety cabinet to the laboratory environment, and through the provision of the water filter basket, the opportunity of the experimental personnel directly contacting the disinfected items can be reduced, thereby reducing the possible risk of secondary contamination and enhancing the safety of the entire experimental process;

[0014] Secondly, by setting up the switching component, when the main filter is blocked, the backup filter can be quickly switched to promptly eliminate the airflow turbulence and negative pressure instability caused by filter blockage, thereby maintaining the biological protection function of the safety cabinet for operators, samples and the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a sectional view of the overall structure of the utility model.

[0017] Figure 3 It is a front cross-sectional view of the experimental chamber structure of the utility model.

[0018] Figure 4 It is a top view of the disinfection chamber structure of the utility model.

[0019] Figure 5 It is a top view of the experimental chamber structure of the utility model.

[0020] Figure 6 It is a schematic diagram of the top block structure of the utility model.

[0021] Figure 7 This is a schematic diagram of the structure of the water filter basket of the utility model.

[0022] Figure 8 For the utility model Figure 2 Enlarged view of point A in .

[0023] Fig. 9 For the utility model Figure 2 Enlarged view of point B in .

[0024] Figure 1-9In: 1. Cabinet; 101. Experimental chamber; 102. Electric push rod; 103. Filter; 104. Ventilation net a; 105. Exhaust chamber; 106. Notch; 107. Protective glass; 108. Ultraviolet lamp; 2. Bracket; 201. Electric telescopic rod; 3. Water chamber; 301. Experimental gloves; 302. Water outlet pipe; 303. Water pump; 304. Water pump; 4. Disinfection chamber; 401. Filter basket; 402. Iron sheet; 403. Heating rod; 40 4. Nozzle; 405. Rectangular groove; 406. Exhaust pipe; 5. Top block; 501. Connecting block; 502. Base; 503. Electromagnet; 6. Vacuum pump; 601. Inlet pipe; 602. Outlet pipe; 603. Pipe cavity; 604. Main inlet pipe; 605. Spare inlet pipe; 606. Main filter cavity; 607. Spare filter cavity; 608. Ventilation net b; 7. Main filter; 701. Spare filter; 702. Connecting pipe; 8. Pressure sensor. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0026] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0027] The embodiment of the present application provides a biological experiment safety cabinet, which can reduce the risk of biological contaminants leaking from the safety cabinet to the laboratory environment through the setting of the disinfection component, and at the same time can reduce the chance of laboratory personnel directly contacting disinfected items, reduce the possible risk of secondary contamination, and through the setting of the switching component, can quickly switch the spare filter to maintain the biological protection function of the safety cabinet for operators, samples and the environment. The biological experiment safety cabinet is described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0028] The present application is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] Example 1

[0030] See also Figure 1-9 In the embodiment, a biological experiment safety cabinet is provided, including: a cabinet body 1, an experimental chamber 101 is opened inside the cabinet body 1, a pipeline chamber 603 is opened inside the cabinet body 1, a main filter chamber 606 is opened below the pipeline chamber 603, a spare filter chamber 607 is opened on one side of the main filter chamber 606, a main filter 7 is arranged inside the main filter chamber 606, a spare filter 701 is arranged inside the spare filter chamber 607, and a disinfection chamber 4 is opened below the experimental chamber 101; a switching component arranged between the experimental chamber 101 and the pipeline chamber 603, which is used for switching the spare filter 701; and a disinfection component arranged between the experimental chamber 101 and the disinfection chamber 4, which is used for disinfecting experimental instruments.

[0031] Among them, by setting up the disinfection component, the experimental equipment made of glass or metal can be fully disinfected, reducing the risk of biological contaminants leaking from the safety cabinet to the laboratory environment, and by setting up the water filter basket 401, the opportunity of the experimenter directly contacting the disinfected items can be reduced, thereby reducing the possible risk of secondary contamination and enhancing the safety of the entire experimental process;

[0032] Secondly, by setting the switching component, when the main filter 7 is blocked, the spare filter 701 can be quickly switched to promptly eliminate the airflow turbulence and negative pressure instability caused by the blockage of the main filter 7, thereby maintaining the biological protection function of the safety cabinet for operators, samples and the environment.

[0033] Example 2

[0034] On the basis of Example 1, the switching component includes: a vacuum pump 6 arranged on the top of the cabinet 1, an air inlet pipe 601 is arranged on one side of the vacuum pump 6, an air outlet pipe 602 is arranged on the bottom of the vacuum pump 6, one end of the air outlet pipe 602 extends into the pipe cavity 603, and is connected to the main air inlet pipe 604 through a three-way pipe, one end of the main air inlet pipe 604 extends into the main filter cavity 606, one end of the air outlet pipe 602 is connected to the spare air inlet pipe 605 through the three-way pipe, and one end of the spare air inlet pipe 605 extends into the spare filter cavity 607; a connecting pipe 702 is arranged between the main filter cavity 606 and the spare filter cavity 607, a ventilation net b608 is arranged on one side of the main filter cavity 606, an exhaust cavity 105 is opened on one side of the inner wall of the experimental cavity 101; a plurality of ultraviolet lamps 1 are arranged on the top of the inner wall of the experimental cavity 101 08. A bracket 2 is provided on the top of the cabinet 1, and two electric telescopic rods 201 are provided on the top of the bracket 2. A slot 106 is opened on the top of the cabinet 1. Protective glass 107 is fixedly connected to the bottom ends of the two electric telescopic rods 201, and the bottom end of the protective glass 107 passes through the slot 106 and extends into the interior of the experimental chamber 101. Sealing strips are provided at the positions where the outer side of the protective glass 107 contacts the experimental chamber 101 and the inner wall of the slot 106, and a plurality of experimental gloves 301 are provided on one side of the protective glass 107; a filter 103 is provided inside the exhaust chamber 105, and a ventilation net a104 is provided on one side of the inner wall of the exhaust chamber 105; solenoid valves are provided on the main air inlet pipe 604, the spare air inlet pipe 605 and the connecting pipe 702, and a pressure sensor 8 is provided on one side of the inner wall of the main filter chamber 606.

[0035] When in use, the experimenter can control the two electric telescopic rods 201 to retract, so that the protective glass 107 rises, and place the experimental equipment and samples in the experimental chamber 101, and then control the two electric telescopic rods 201 to lower the protective glass 107, thereby closing the experimental chamber 101, and at the same time open the vacuum pump 6 and the solenoid valve in the main air inlet pipe 604 to draw air from the outside, so that the air passes through the air inlet pipe 601, the air outlet pipe 602 and the main air inlet pipe 604, enters the main filter chamber 606, and then enters the experimental chamber 101 through the ventilation net b608 after being filtered by the main filter 7, and then enters the exhaust chamber 105. The air inside the experimental chamber 101 is filtered and discharged with the help of the filter 103 in the exhaust chamber 105. At this time, the user can put his hand into the experimental glove 301 on one side of the protective glass 107 to perform experimental operations.

[0036] When the main filter 7 inside the main filter chamber 606 is clogged, resulting in air flow turbulence and unstable negative pressure, the air pressure in the main filter chamber 606 will gradually increase and trigger the pressure sensor 8, causing the pressure sensor 8 to send an electrical signal to the control terminal, thereby opening the solenoid valve in the connecting pipe 702 and the spare air intake pipe 605, and closing the solenoid valve in the main air intake pipe 604, and then introducing the air into the spare filter chamber 607 through the spare air intake pipe 605, thereby completing the rapid switching of the main filter 7 and the spare filter 701 to avoid affecting the experimental efficiency.

[0037] Among them, the pressure sensor 8 can be a gas pressure sensor of model WPAH01. This type of pressure sensor 8 is a device specially designed to measure the absolute pressure or relative pressure in the gas medium and convert it into an electrical signal that can be read or further processed. This type of sensor usually includes one or more sensitive elements. These elements will produce corresponding physical changes when they come into contact with changes in gas pressure, such as changes in resistance value, capacitance value or frequency. When the gas pressure acts on the sensor, the sensing element will convert this pressure signal into an electrical signal. After amplification, linearization, temperature compensation and other steps by the signal processing circuit, it will finally output an analog signal or a digital signal. These signals can be directly read by instruments, control systems or other data acquisition systems for monitoring, alarm, control and data analysis.

[0038] In addition, a sealing plate is connected to one side of the spare filter chamber 607 and the main filter chamber 606 by bolts, and a sealing ring is arranged between the sealing plate and the cabinet 1. When the main filter 7 or the spare filter 701 needs to be replaced, the user removes the sealing plate for replacement or maintenance.

[0039] Example 3

[0040] On the basis of Example 1, the disinfection component includes: a rectangular groove 405 opened at the bottom of the inner wall of the experimental chamber 101, a top block 5 is arranged inside the rectangular groove 405, an electric push rod 102 is arranged on the top of the cabinet 1, the bottom end of the electric push rod 102 passes through the experimental chamber 101 and is fixedly connected to the top block 5, a connecting block 501 is fixedly connected to the bottom of the top block 5, a base 502 is fixedly connected to the bottom of the connecting block 501, an electromagnet 503 is arranged on the top of the base 502, sealing rings are arranged on the outside of the top block 5 and the base 502, and a water filter basket 401 is arranged on the top of the base 502 ; A plurality of heating rods 403 are arranged on one side of the interior of the disinfection chamber 4, an exhaust pipe 406 is arranged on the top of the inner wall of the disinfection chamber 4, and a solenoid valve is arranged on the exhaust pipe 406; an iron sheet 402 is arranged at the bottom of the water filter basket 401, a drain pipe is arranged on one side of the interior of the disinfection chamber 4, a water chamber 3 is opened on one side of the disinfection chamber 4, a water inlet pipe is arranged on one side of the inner wall of the water chamber 3, a water pump 304 is arranged inside the water chamber 3, a water pump 303 is connected to one side of the water pump 304, a water outlet pipe 302 is connected to the top of the water pump 304, one end of the water outlet pipe 302 extends into the disinfection chamber 4 and is connected to a nozzle 404.

[0041] After the experiment, the experimenter can control the electric push rod 102 to retract, drive the top block 5, the electromagnet 503 and the water filter basket 401 to rise, until the water filter basket 401 leaves the disinfection chamber 4, and move the electromagnet 503 into the rectangular groove 405. At this time, the experimenter puts the experimental equipment into the water filter basket 401 through the experimental gloves 301 on the side of the protective glass 107, and controls the electric push rod 102 to extend, and moves the experimental equipment in the water filter basket 401 into the disinfection chamber 4 until the top block 5 is reset, and then turns on the water pump 304 in the water chamber 3, and pumps the water in the water chamber 3 through the water pump 304, so that the water passes through the pumping pipe 303 and the outlet pipe 304. 02, sprayed from the nozzle 404 into the disinfection chamber 4 until the water in the disinfection chamber 4 enters the filter basket 401 through the hole on the outside of the filter basket 401, and the water level line does not filter the water basket 401, then open the multiple heating rods 403 and the electromagnetic valves on the exhaust pipe 406, and heat the water in the disinfection chamber 4 through the heating rods 403 to disinfect the experimental equipment, and when steam is generated in the disinfection chamber 4, the steam can be discharged from the disinfection chamber 4 through the exhaust pipe 406, and the water used for disinfection can be discharged into a specific treatment box through the drain pipe on one side of the disinfection chamber 4, and the water in the water chamber 3 can be replenished through the water inlet pipe on one side of the water chamber 3.

[0042] Furthermore, when the disinfection is completed, the experimenter can control the electric push rod 102 to retract, move the water filter basket 401 into the disinfection chamber 4, and turn off the electromagnet 503 to release the limit of the water filter basket 401. Then, the handle on the water filter basket 401 can be lifted to move the experimental equipment out of the experimental chamber 101, so as to avoid direct contact between the experimenter and the experimental equipment, which may cause secondary contamination of the experimental equipment.

[0043] In addition, a control panel is provided on one side of the cabinet 1, and the control panel can control the closing and starting of the vacuum pump 6, the electric push rod 102, the electric telescopic rod 201, the electromagnet 503, and the exhaust pipe 406, the main air intake pipe 604, the spare air intake pipe 605, and the solenoid valve in the connecting pipe 702, and the power of the device is provided by an external power supply.

[0044] The control program involved in the present utility model can be implemented by those skilled in the art according to the same or similar principles in the prior art, and this part is not the innovation of the present utility model.

[0045] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0046] The above is a detailed introduction to a biological experiment safety cabinet provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A biological experiment safety cabinet, characterized in that: include: A cabinet (1), wherein an experimental chamber (101) is provided inside the cabinet (1), a pipeline chamber (603) is provided inside the cabinet (1), a main filter chamber (606) is provided below the pipeline chamber (603), a spare filter chamber (607) is provided on one side of the main filter chamber (606), a main filter (7) is provided inside the main filter chamber (606), a spare filter (701) is provided inside the spare filter chamber (607), and a disinfection chamber (4) is provided below the experimental chamber (101); a switching component provided between the experimental chamber (101) and the pipeline chamber (603), used for switching the standby filter (701); and The disinfection component provided between the experimental chamber (101) and the disinfection chamber (4) is used for disinfecting experimental instruments.

2. The biological experiment safety cabinet according to claim 1, characterized in that: The switching component comprises: A vacuum pump (6) is arranged on the top of the cabinet (1), an air inlet pipe (601) is arranged on one side of the vacuum pump (6), an air outlet pipe (602) is arranged on the bottom of the vacuum pump (6), one end of the air outlet pipe (602) extends into the pipeline cavity (603) and is connected to a main air inlet pipe (604) via a three-way pipe, one end of the main air inlet pipe (604) extends into the main filter cavity (606), one end of the air outlet pipe (602) is connected to a spare air inlet pipe (605) via a three-way pipe, and one end of the spare air inlet pipe (605) extends into the interior of the spare filter cavity (607); A connecting pipe (702) is provided between the main filter chamber (606) and the backup filter chamber (607); a ventilation net b (608) is provided on one side of the main filter chamber (606); and an exhaust chamber (105) is provided on one side of the inner wall of the experimental chamber (101).

3. The biological experiment safety cabinet according to claim 1, characterized in that: A plurality of ultraviolet lamps (108) are arranged on the top of the inner wall of the experimental chamber (101); a bracket (2) is arranged on the top of the cabinet (1); two electric telescopic rods (201) are arranged on the top of the bracket (2); a notch (106) is opened on the top of the cabinet (1); protective glass (107) is fixedly connected to the bottom ends of the two electric telescopic rods (201); the bottom ends of the protective glass (107) pass through the notch (106) and extend into the interior of the experimental chamber (101); sealing strips are arranged on the outer side of the protective glass (107) at positions where the outer side of the protective glass (107) contacts the experimental chamber (101) and the inner wall of the notch (106); and a plurality of experimental gloves (301) are arranged on one side of the protective glass (107).

4. The biological experiment safety cabinet according to claim 2, characterized in that: A filter (103) is provided inside the exhaust cavity (105), and a ventilation net a (104) is provided on one side of the inner wall of the exhaust cavity (105).

5. The biological experiment safety cabinet according to claim 4, characterized in that: The main air intake pipe (604), the backup air intake pipe (605) and the connecting pipe (702) are all provided with solenoid valves, and a pressure sensor (8) is provided on one side of the inner wall of the main filter chamber (606).

6. The biological experiment safety cabinet according to claim 1, characterized in that: The disinfection component comprises: A rectangular groove (405) is provided at the bottom of the inner wall of the experimental chamber (101), a top block (5) is provided inside the rectangular groove (405), an electric push rod (102) is provided at the top of the cabinet (1), the bottom end of the electric push rod (102) passes through the experimental chamber (101) and is fixedly connected to the top block (5), a connecting block (501) is fixedly connected to the bottom end of the top block (5), a base (502) is fixedly connected to the bottom of the connecting block (501), an electromagnet (503) is provided at the top of the base (502), sealing rings are provided on the outside of the top block (5) and the base (502), and a water filter basket (401) is provided at the top of the base (502); A plurality of heating rods (403) are arranged on one side of the interior of the disinfection chamber (4); an exhaust pipe (406) is provided on the top of the inner wall of the disinfection chamber (4); and a solenoid valve is provided on the exhaust pipe (406).

7. The biological experiment safety cabinet according to claim 6, characterized in that: An iron sheet (402) is provided at the bottom of the water filter basket (401); a drainage pipe is provided on one side of the interior of the disinfection chamber (4); a water chamber (3) is provided on one side of the disinfection chamber (4); a water inlet pipe is provided on one side of the inner wall of the water chamber (3); a water pump (304) is provided inside the water chamber (3); a water pump (303) is connected to one side of the water pump (304); a water outlet pipe (302) is connected to the top of the water pump (304); one end of the water outlet pipe (302) extends into the disinfection chamber (4) and is connected to a nozzle (404).

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