Biological safety end disinfection and sterilization device and experiment space

Abstract

The utility model relates to a biological safety final disinfection and sterilization device and an experimental space, which are used for solving the problem of residual pollution after formaldehyde disinfection. The device comprises an air supply three-way valve, an air return three-way valve, a formaldehyde generator and an absorption tank, and dual-working-condition operation of disinfection and formaldehyde adsorption is realized by switching valves. Under the disinfection working condition, formaldehyde gas generated by the formaldehyde generator is circulated to the experiment space for sterilization; under the adsorption working condition, residual formaldehyde is discharged after being treated by an absorption tank (containing an adsorption liquid and a gas equalizing pipe), so that no secondary pollution is ensured. The formaldehyde generator adopts silicone oil to heat paraformaldehyde to decompose and produce gas, and the absorption tank prolongs the gas contact time through a backflow cavity, so that the adsorption efficiency is improved. A sensor and a wallboard cleaning robot are integrated in the experimental space, formaldehyde concentration is monitored in real time, and automatic cleaning is achieved. The device has the advantages of high-efficiency sterilization and environmental protection, and is suitable for scenes such as biosafety laboratories and the like.

Description

Technical Field

[0001] This utility model relates to the field of disinfection and sterilization technology, and more specifically, it relates to a biosafety terminal disinfection and sterilization device and experimental space. Background Technology

[0002] Formaldehyde, a colorless and irritating gas, also known as methanal, is colorless and irritates the eyes and nose. It is readily soluble in water and ethanol, with aqueous solutions reaching concentrations up to 55%, typically 40%, known as formaldehyde solution or formalin. It has reducing properties, especially in alkaline solutions, where its reducing power is stronger. It is flammable, and its vapor forms an explosive mixture with air, with an explosion limit of 7%-73%. Its ignition point is approximately 300°C. It can be produced by dehydrogenation or oxidation of methanol under the catalysis of metals such as silver and copper, or it can be separated from the oxidation products of hydrocarbons. It can be used as a raw material for phenolic resins, urea-formaldehyde resins, vinylon, hexamethylenetetramine, pentaerythritol, dyes, pesticides, and disinfectants.

[0003] Among numerous disinfection and sterilization methods, formaldehyde vapor is the most effective for disinfecting and sterilizing biosafety experimental spaces. However, on the other hand, the residual formaldehyde after disinfection pollutes the environment and personnel, leading to its gradual obsolescence by users. How to effectively remove and eliminate residual formaldehyde from the experimental space after disinfection with formaldehyde vapor remains a challenge in existing technologies. Utility Model Content

[0004] This invention overcomes the problem in existing technologies where residual formaldehyde in the experimental space after formaldehyde vapor disinfection and sterilization can easily have adverse effects on the environment and personnel. It provides a biosafety terminal disinfection and sterilization device that can recover excess formaldehyde using the oxidation-reduction principle after formaldehyde disinfection and sterilization of the biosafety experimental space, ensuring that all residual formaldehyde is removed, ensuring no formaldehyde residue, and preventing secondary pollution.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a biosafety terminal disinfection and sterilization device, comprising: an air supply three-way valve, a return air three-way valve, and a formaldehyde generator;

[0006] The three ports of the air supply three-way valve are connected to the fresh air duct, the air supply duct, and the outlet of the formaldehyde generator, respectively.

[0007] The three ports of the return air three-way valve are connected to the recovery pipe, the return air pipe, and the inlet of the formaldehyde generator, respectively;

[0008] The end of the air supply duct is equipped with an air outlet that connects to the experimental space, and a blower is installed on the air supply duct.

[0009] The end of the return air duct is equipped with a return air interface that connects to the experimental space, and a return air fan is installed on the return air duct.

[0010] The end of the recovery pipe away from the return air three-way valve is communicated with the air inlet of the absorption tank.

[0011] In the present application, by setting the above structure, the switching of the air supply three-way valve and the return air three-way valve can realize the switching of the disinfection condition and the formaldehyde residue adsorption condition. In the disinfection condition, the formaldehyde gas in the formaldehyde generator can enter the experimental space to disinfect the inside of the experimental space. When the disinfection is completed, the formaldehyde residue adsorption condition is entered. In this condition, the residual formaldehyde gas in the experimental space can be sucked out. After the residual formaldehyde gas passes through the absorption tank, the formaldehyde gas absorbs the absorption tank, and then is discharged into the air, realizing the rapid elimination of formaldehyde gas.

[0012] Therefore, after the formaldehyde is used to disinfect and sterilize the biosafety experimental space, the present application can recycle the excess formaldehyde by using the oxidation-reduction principle, ensure that the residual formaldehyde is completely removed, ensure that there is no residual formaldehyde, and there is no secondary pollution.

[0013] As a preferred, the formaldehyde generator comprises a heat preservation shell, a heating plate is arranged in the heat preservation shell, and the heating plate divides the heat preservation shell into an upper cavity and a lower cavity;

[0014] The lower cavity is provided with silicon oil and a heater for heating the silicon oil;

[0015] The upper cavity is communicated with a polyformaldehyde storage box, and a flow control valve for controlling the flow of polyformaldehyde into the upper cavity is arranged between the polyformaldehyde storage box and the upper cavity.

[0016] The upper space is provided with an air outlet and an air inlet communicated with the outside; the air outlet is communicated with the air supply three-way valve; and the air inlet is communicated with the return air three-way valve.

[0017] As a preferred, the absorption tank comprises a tank body, an air inlet arranged at the bottom of the tank body, and a reflux cavity arranged in the tank body; and an air outlet is arranged at the top of the tank body.

[0018] As a preferred, a gas equalizing pipe is arranged at a position corresponding to the air inlet in the tank body.

[0019] The present application also provides an experimental space comprising the above-mentioned biosafety terminal disinfection and sterilization device, and further comprising an experimental space inlet and an experimental space outlet communicated with the biosafety experimental space; the experimental space inlet is connected with the air outlet interface, and the experimental space outlet is communicated with the air return interface.

[0020] The air return interface is arranged to be communicated with the experimental space inlet. The air outlet interface is arranged to be communicated with the experimental space outlet.

[0021] As a preferred, a sensor arranged in the experimental space is further included.

[0022] As a preferred option, a wall panel cleaning robot installed in the experimental space is also included.

[0023] Compared with existing technologies, the beneficial effects of this utility model are as follows: By setting the above structure and switching between the supply air three-way valve and the return air three-way valve, the disinfection mode and the formaldehyde residue adsorption mode can be switched. In the disinfection mode, the formaldehyde gas in the formaldehyde generator can enter the experimental space to disinfect the interior of the experimental space. After disinfection is completed, the formaldehyde residue adsorption mode is entered. In this mode, the residual formaldehyde gas in the experimental space can be absorbed. The residual formaldehyde gas passes through the absorption tank, is absorbed by the absorption tank, and is then discharged into the air, achieving rapid elimination of formaldehyde gas.

[0024] Therefore, this application can recover excess formaldehyde by utilizing the oxidation-reduction principle after formaldehyde disinfects and sterilizes the biosafety experimental space, ensuring that all residual formaldehyde is removed, ensuring that there is no formaldehyde residue, and preventing secondary pollution. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the absorption tank of this utility model.

[0027] Figure 3 This is a structural schematic diagram of the formaldehyde generator of this utility model.

[0028] Figure 4 This is a simplified diagram of the disinfection process of this utility model.

[0029] Figure 5 This is a simplified diagram of the formaldehyde residue adsorption process of this utility model. Detailed Implementation

[0030] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Embodiment 1: As shown in the figure Figures 1 to 5 As shown, a terminal disinfection and sterilization device includes: an air supply three-way valve 8, a return air three-way valve 11, and a formaldehyde generator 4; it also includes a control system 12 for controlling the terminal disinfection and sterilization device and a sensor 13 installed in the biosafety space 5.

[0031] The three ports of the supply air three-way valve 8 are connected to the fresh air duct 161, the supply air duct 162 and the outlet of the formaldehyde generator 4, respectively; the three ports of the return air three-way valve 3 are connected to the recovery pipe 164, the return air duct 163 and the inlet of the formaldehyde generator 4, respectively.

[0032] The end of the air supply pipe 162 is provided with an air outlet interface 141 in communication with the experimental space 5, and an air supply fan 2 is arranged on the air supply pipe 162; the end of the air return pipe 163 is provided with an air return interface 142 in communication with the experimental space 5, and an air return fan 3 is arranged on the air return pipe 163; the end of the recovery pipe 164 away from the air return tee valve 11 is in communication with the gas inlet 75 of the absorption tank 7.

[0033] As shown in Figure 3 The formaldehyde generator 4 comprises a heat preservation shell 47, and a heating plate 43 is arranged in the heat preservation shell 47, and the heat preservation shell 47 is divided into an upper cavity and a lower cavity by the heating plate 43;

[0034] The lower cavity is provided with silicon oil 42 and a heater 41 for heating the silicon oil 42;

[0035] The upper cavity is in communication with a polyformaldehyde storage box 48, and a flow control valve 49 for controlling the flow of polyformaldehyde into the upper cavity is arranged between the upper cavity and the polyformaldehyde storage box 48;

[0036] The upper space is provided with an air outlet 44 and an air inlet 46 in communication with the outside; the air outlet 44 is in communication with the air supply tee valve 8; the air inlet 46 is in communication with the air return tee valve 11. The upper space is provided with a polyformaldehyde outlet 40, and the polyformaldehyde in the polyformaldehyde storage box 48 enters the upper cavity from the polyformaldehyde outlet 40.

[0037] As shown in Figure 2 The absorption tank 7 comprises a tank body 74, a gas inlet 75 arranged at the bottom of the tank body, and a reflux cavity 72 arranged in the tank body 74; an air outlet 76 is arranged at the top of the tank body 74. The tank body 74 is made of stainless steel material. The gas is discharged from the air outlet 76 after passing through the reflux cavity 75, and a uniform gas pipe 71 is arranged at a position corresponding to the gas inlet 75 in the tank body 74.

[0038] The working principle of the absorption tank 7 is as follows: the exhaust gas enters the gas inlet 75, first passes through the uniform gas pipe 71 to form uniform bubbles, the bubbles pass through the adsorption liquid 73 and reciprocate in the reflux cavity 72, the maximum flow path interacts with the adsorption liquid 73, so that the formaldehyde content in the exhaust gas of the air outlet 76 is reduced to the allowable value, and is discharged through the air outlet 76.

[0039] A fresh air filter 9 is arranged on the fresh air pipe 161.

[0040] The working principle of the present application is as follows: before using the terminal disinfection and sterilization device, first, the air outlet interface 141 is in communication with the experimental space 5, then the air return interface 142 is in communication with the experimental space 5, and then the sensor 13 is arranged in the experimental space 5. The present application includes two working conditions, which are disinfection working condition and formaldehyde residual adsorption working condition; specifically:

[0041] Disinfection mode (as shown in Figure 4 According to the volume of the experimental space 5, the flow control valve 49 controls the flow rate, and the amount of paraformaldehyde in the paraformaldehyde storage box 48 is automatically put into the paraformaldehyde. The paraformaldehyde drops onto the heating plate 43. The heater 41 heats the silicone oil, which causes the heating plate 43 to heat up, and controls the silicone oil to heat to a set temperature. The paraformaldehyde dropped on the heating plate 43 smokes, and the control of the return fan 3 and the supply fan 2 starts to run. Control the supply three-way valve 8, so that the air outlet 44 of the formaldehyde generator is connected with the supply pipe 162. Control the return three-way valve 11, so that the air inlet 46 of the generator 4 is connected with the return pipe 163. Therefore, at this time, the formaldehyde gas flow direction is: formaldehyde generator 4-supply three-way valve 8-supply pipe 162-supply fan 2-gas outlet 141-experimental space 5-gas return port 142-return fan 3-return pipe 163-return three-way valve 11, and finally back to the formaldehyde generator 4 through the air inlet 46. The control system 12 controls the time of the cycle, and the sensor 13 detects the formaldehyde gas concentration in the experimental space 5 to reach the set value, and starts timing. When the timing time is up, the disinfection mode ends.

[0042] In this process, the sensor 13 detects the air pressure in the disinfection space 5, and controls the frequency of the supply fan 2 and the exhaust fan 3, so that the air pressure in the experimental space 5 is always controlled to be negative pressure.

[0043] Formaldehyde residue adsorption mode (as shown in Figure 5 The heater 41 of the formaldehyde generator 4 is controlled to be closed. Control the supply three-way valve 8, so that the fresh air pipe 161 is connected with the supply pipe 162. Control the return three-way valve 11, so that the return pipe 163 is connected with the recovery pipe 164. At this time, the air flow direction is: the outside air enters from the fresh air inlet 10-new air filter 9-new air pipe 161-supply three-way valve 8-supply pipe 162-supply fan 2-gas outlet 141-experimental space 5-gas return port 142-return fan 3-return pipe 163-return three-way valve 11-recovery pipe 164-absorption tank 7. The exhaust gas flows into the tank body 74 through the gas inlet 75 of the absorption tank 7, is adsorbed in the backflow cavity 72, and is discharged from the gas outlet 76 of the tank body 74, and finally is discharged from the exhaust gas port 143. The sensor 13 detects the concentration of formaldehyde gas, and when it reaches the lower limit value, the formaldehyde residue adsorption mode ends. The wall cleaning robot 6 starts to run and starts to wipe the wall to clean up the residual formaldehyde gas. At this time, the disinfection work of the disinfection space is completed.

[0044] Example 2: Referring to Figures 1 to 5 The experimental space includes the experimental space inlet 151 and the experimental space outlet 152 connected with the experimental space 5; the experimental space inlet 151 is connected with the gas outlet 141, and the experimental space outlet 152 is connected with the gas return port 142.

[0045] The gas return interface 142 is arranged to communicate with the experiment space inlet 151.

[0046] A wall cleaning robot 6 for the experiment space. The wall cleaning robot 6 is capable of automatically cleaning the inner wall of the experiment space.

[0047] The above-described embodiments are only the preferred schemes of the present application, and do not limit the present application in any form, and other variations and modifications are possible without departing from the technical schemes recited in the claims.

Claims

1. A biosafety terminal disinfection and sterilization device, characterized in that, include: Supply air three-way valve, return air three-way valve and formaldehyde generator; The three ports of the air supply three-way valve are connected to the fresh air duct, the air supply duct, and the outlet of the formaldehyde generator, respectively. The three ports of the return air three-way valve are connected to the recovery pipe, the return air pipe, and the inlet of the formaldehyde generator, respectively; The end of the air supply duct is equipped with an air outlet that connects to the experimental space, and a blower is installed on the air supply duct. The end of the return air duct is equipped with a return air interface that connects to the experimental space, and a return air fan is installed on the return air duct. The end of the recovery pipe furthest from the return air three-way valve is connected to the air inlet of the absorption tank.

2. The biosafety terminal disinfection and sterilization device according to claim 1, characterized in that, The formaldehyde generator includes an insulated shell, inside which a heating plate is installed, dividing the interior of the insulated shell into an upper cavity and a lower cavity. The lower cavity contains silicone oil and a heater for heating the silicone oil; The upper cavity is connected to the paraformaldehyde storage box, and a flow control valve is installed between the paraformaldehyde storage box and the upper cavity to control the flow of paraformaldehyde into the upper cavity. The upper space is equipped with an air outlet and an air inlet that connect to the outside; the air outlet is connected to a supply air three-way valve; and the air inlet is connected to a return air three-way valve.

3. The biosafety terminal disinfection and sterilization device according to claim 1, characterized in that, The absorption tank includes: a tank body, an air inlet located at the bottom of the shell, and a reflux chamber located inside the tank body; an air outlet is located at the top of the tank body.

4. The biosafety terminal disinfection and sterilization device according to claim 3, characterized in that, An air distribution pipe is installed inside the tank at the position corresponding to the air inlet.

5. The biosafety terminal disinfection and sterilization device according to any one of claims 1 to 4, characterized in that, A fresh air filter is installed on the fresh air duct.

6. An experimental space, characterized in that, The device includes the biosafety terminal disinfection and sterilization device as described in any one of claims 1 to 5, and further includes an experimental space inlet and an experimental space outlet connected to the biosafety experimental space; the experimental space inlet is connected to an exhaust port, and the experimental space outlet is connected to a return port.

7. The experimental space according to claim 6, characterized in that, It also includes sensors installed within the experimental space.

8. The experimental space according to claim 6, characterized in that, It also includes a wall panel cleaning robot installed in the experimental space.

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