Formaldehyde sterilizer
By combining a vacuum pump with a formaldehyde purification structure, the high cost of existing low-temperature formaldehyde sterilizers is solved, achieving efficient and low-cost sterilization and reducing gas toxicity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-03-27
AI Technical Summary
Existing low-temperature formaldehyde sterilizers require additional structures to generate water vapor and recover formaldehyde condensate, resulting in high costs and complicated handling.
By employing components such as vacuum pumps, formaldehyde purification structures, and air intake filters, the system reduces work steps, lowers costs, and improves efficiency through vacuum pump extraction, formaldehyde liquid heating and evaporation, and multiple purification processes.
It simplifies the sterilization process, reduces costs, improves work efficiency, and reduces the toxicity of exhaust gases through multiple purification processes.
Smart Images
Figure CN224039663U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of sterilization equipment, specifically is a formaldehyde sterilizer. BACKGROUND
[0002] Traditional medical instrument sterilization is mainly realized through steam sterilizer, and the steam sterilizer mainly kills bacteria and viruses on medical instruments through high-temperature and high-pressure steam, so as to guarantee the use safety of medical instruments and avoid infection of bacteria and viruses in the process of using medical instruments. However, with the continuous emergence of new medical instruments, some medical instruments are easy to affect their performance and service life when sterilized at high temperature, so low-temperature steam formaldehyde sterilization equipment has been vigorously promoted and developed.
[0003] Formaldehyde has high sterilization effect on various microorganisms, including bacterial propagules, spores, mycobacteria, fungi and viruses. Its sterilization mechanism is that formaldehyde is an alkylating agent, which can alkylate and denature the active genes of bacterial protein, enzyme and nucleic acid. It can generate methylene derivatives with amino, sulfhydryl, hydroxyl and carboxyl groups on the protein molecules, thereby destroying the protein of bacteria (especially enzyme) and leading to the death of microorganisms. However, some existing low-temperature formaldehyde sterilizers have some deficiencies, such as: when using, formaldehyde gas is usually mixed with steam for sterilization treatment, and this method needs to additionally equip corresponding structures for generating water vapor and corresponding structures for recovering formaldehyde-containing condensed liquid, which has the problems of high cost and subsequent processing trouble. UTILITARIAN CONTENT
[0004] The utility model mainly provides a formaldehyde sterilizer, solves the problem that the prior art is usually mixed with steam for sterilization treatment when using, and this method needs to additionally equip corresponding structures for generating water vapor and corresponding structures for recovering formaldehyde-containing condensed liquid, which has the problems of high cost and subsequent processing trouble.
[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme:
[0006] The formaldehyde sterilizer comprises a rack, a sterilization working chamber, a puncture structure, a vacuum pump, a formaldehyde purification structure, an air inlet filter and a closing cover for closing the sterilization working chamber; the sterilization working chamber is provided with an air outlet and an air inlet, a first liquid inlet control valve is installed on the sterilization working chamber, a first liquid evaporation box is installed on the sterilization working chamber, the first liquid inlet control valve is communicated with the first liquid evaporation box, an air outlet electromagnetic valve is installed on the air outlet, and an air inlet electromagnetic valve is installed on the air inlet; the output end of the puncture structure is communicated with the first liquid inlet control valve, and a first power pump is connected in series between the puncture structure and the first liquid inlet control valve; one end of the vacuum pump is communicated with the air outlet electromagnetic valve, and the other end is communicated with the formaldehyde purification structure; the air inlet filter is communicated with the air inlet electromagnetic valve; and a detection sensor for detecting the pressure in the chamber is installed on the sterilization working chamber.
[0007] The first liquid evaporation box has a heating evaporation function, which is realized by any existing heating component, so as to realize the evaporation of the liquid therein. The first power pump can adopt existing technologies, such as a peristaltic pump. The formaldehyde purification structure has an oxidation catalyst member capable of carrying out a purification reaction with formaldehyde, and the oxidation catalyst member is a consumable. The connection modes between the components in the application include but are not limited to pipeline connection, direct connection between the ports of the components, etc. Each component in the application can be installed on the rack or the remaining components.
[0008] Working principle: place the medical devices to be sterilized in the sterilization working chamber, close the closing cover with the sterilization working chamber, perform air extraction in the sterilization working chamber by the vacuum pump, when the detection sensor detects that the pressure in the sterilization working chamber reaches a preset threshold, pass the formaldehyde in the puncture structure into the first liquid evaporation box through the first power pump, then heat and evaporate the formaldehyde liquid in the first liquid evaporation box to make the formaldehyde gas fill in the sterilization working chamber, extract all the gas in the sterilization working chamber to the formaldehyde purification structure through the vacuum pump, and then purify again and discharge to the air, at the same time, close the air inlet electromagnetic valve to realize the pressure reduction in the sterilization working chamber during the initial air extraction, open the air inlet electromagnetic valve and make the vacuum pump work before the final air exhaust, so that the external air can enter the sterilization working chamber after passing through the air inlet filter to ensure that the pressure in the sterilization working chamber is in a normal state. Compared with mixing formaldehyde gas with low-temperature steam, the structure of the application reduces the working steps, improves the working efficiency, and reduces the cost of generating steam and processing formaldehyde condensate, and directly heats and evaporates the formaldehyde, which is more efficient. The application can reduce the toxicity of the mixed gas to be discharged by cooperating with the formaldehyde purification structure to purify the mixed gas to be discharged multiple times. The air inlet filter can filter the air entering the sterilization working chamber.
[0009] Further, the sterilization device further comprises an internal circulation structure, which comprises a formaldehyde decomposition chamber, a heat dissipation device and an internal circulation fan; the upper end of the formaldehyde decomposition chamber is in communication with one end of the heat dissipation device, the other end of the heat dissipation device is in communication with one end of the internal circulation fan, and the other end of the internal circulation fan is in communication with the air inlet; the sterilization working chamber is provided with a circulation upper opening at the upper end, and the lower end of the formaldehyde decomposition chamber is in communication with the circulation upper opening. The formaldehyde decomposition chamber is provided with an oxidation catalyst capable of reacting with formaldehyde, and the formaldehyde decomposition chamber is provided with a heating structure. In use, after the sterilization work is completed, the internal circulation fan is started to drive the mixed gas containing formaldehyde gas in the sterilization working chamber to circulate in the internal circulation structure, so that the mixed gas containing formaldehyde gas is preliminarily purified. At the same time, the heat dissipation device can cool the heated gas in the formaldehyde decomposition chamber and return to the sterilization working chamber. By adopting the structure, the formaldehyde in the mixed gas can be preliminarily treated, so that the discharged mixed gas is safer in cooperation with the neutralizing agent and the formaldehyde purification structure.
[0010] Further, a first ball valve is connected in series between the lower end of the formaldehyde decomposition chamber and the circulation upper opening, and a second ball valve is connected in series between the other end of the internal circulation fan and the air inlet. By adopting the first ball valve and the second ball valve, the internal circulation structure can be closed when not in use, so as to avoid excessive consumption of consumables for purifying formaldehyde in the formaldehyde decomposition chamber and reduce the formaldehyde gas concentration in the sterilization chamber.
[0011] Further, the puncture structure comprises a sealed container for placing a formaldehyde tank, an electric push rod and a puncture needle; the puncture needle is installed at the output end of the electric push rod, the sealed container is provided with a sealing element matched with the puncture needle, the puncture needle moves in the sealed container under the driving of the electric push rod, and the liquid hole of the sealed container is in communication with the first liquid inlet control valve through the first power pump. In use, the formaldehyde tank containing formaldehyde is placed in the sealed container and sealed, the puncture needle is driven by the electric push rod to puncture the formaldehyde tank in the sealed container through the sealing element, the electric push rod drives the puncture needle to reset after puncturing, the formaldehyde liquid in the formaldehyde tank flows into the sealed container, and the formaldehyde liquid in the sealed container can be transported into the first liquid evaporation box through the first power pump; when the formaldehyde liquid in the sealed container is consumed, the sealed container is opened for replacement of the formaldehyde tank. The structure can replace the formaldehyde tank after the formaldehyde in the sealed container is consumed, and the formaldehyde tank is punctured to flow into the sealed container after entering the sealed container, which can reduce the safety hazard caused by adding formaldehyde to the equipment compared with opening the container containing formaldehyde and then pouring the formaldehyde into the corresponding container of the equipment.
[0012] Further, a heating plate is installed on the outer side wall of the closed container. With this structure, the closed container can be heated by the heating plate, so that the formaldehyde liquid in the closed container evaporates and enters the sterilization working chamber, and then the closed container is opened for safe replacement of the formaldehyde tank.
[0013] Further, the air inlet filter is installed on one side of the formaldehyde purification structure. In this way, the formaldehyde purification structure can be cooled by the air inlet, and the gas entering the sterilization working chamber can be preheated.
[0014] Further, the formaldehyde purification structure includes a first purification chamber and a second purification chamber, the first purification chamber is provided with a communication port communicated with the vacuum pump, the second purification chamber is provided with an exhaust port, and the first purification chamber is communicated with the second purification chamber. With this structure, the formaldehyde content in the mixed gas can be further reduced by two times of purification.
[0015] Further, it also includes an exhaust fan communicated with the exhaust port. With this structure, the mixed gas can be better discharged in cooperation with the formaldehyde purification structure.
[0016] Further, it also includes a housing installed on the rack. The housing can protect the components on the rack.
[0017] Further, the sterilization working chamber is provided with a heating device for heating the inside of the chamber. The heating device can be any one of the existing technologies as long as it can heat the inside of the sterilization working chamber. With this structure, the sterilization working chamber can be heated, so that the sterilization work can be better performed.
[0018] Advantages: compared with mixing formaldehyde gas with low-temperature steam, the structure of the present application reduces the working steps, improves the working efficiency, and reduces the cost of generating steam and processing formaldehyde condensate. The efficiency of directly heating and evaporating formaldehyde is higher. The present application can purify the mixed gas to be discharged multiple times by cooperating with the formaldehyde purification structure, so as to reduce the toxicity of the discharged mixed gas. The air inlet filter can filter the air entering the sterilization working chamber. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is a schematic view of the formaldehyde sterilizer from the oblique view of the present embodiment;
[0020] Figure 2 It is a schematic view of the formaldehyde sterilizer from the rear view of the present embodiment;
[0021] Figure 3 It is a schematic view of the formaldehyde sterilizer from the front view of the present embodiment;
[0022] Figure 4 It is a left view schematic view of the formaldehyde sterilizer of the embodiment;
[0023] Figure 5 It is a cross-sectional view schematic view of the puncture structure of the embodiment;
[0024] Figure 6 It is an oblique view schematic view of the puncture structure of the embodiment;
[0025] Figure 7 It is an oblique view schematic view of the formaldehyde purification structure of the embodiment;
[0026] Figure 8 It is a cross-sectional view schematic view of the formaldehyde purification structure of the embodiment;
[0027] Figure 9 It is a cross-sectional view schematic view of the formaldehyde decomposition chamber of the embodiment.
[0028] The figure mark: rack 1, sterilization workroom 2, suction port 21, air inlet 22, first liquid inlet control valve 23, first liquid evaporation box 25, suction solenoid valve 27, air inlet solenoid valve 28, puncture structure 3, sealed container 31, electric push rod 32, puncture needle 33, sealing element 34, heating plate 35, vacuum pump 5, formaldehyde purification structure 6, first purification chamber 61, second purification chamber 62, communication port 63, exhaust port 64, purification chamber heating assembly 65, purification chamber temperature sensor 66, air inlet filter 7, internal circulation structure 8, formaldehyde decomposition chamber 81, decomposition chamber shell 811, decomposition chamber heating assembly 812, decomposition chamber temperature sensor 813, heat dissipation device 82, internal circulation fan 83, first ball valve 84, second ball valve 85, exhaust gas fan 9, heating device 10, oxidation catalyst 11. DETAILED DESCRIPTION
[0029] The technical scheme of the formaldehyde sterilizer of the utility model will be further explained in detail in combination with the embodiments.
[0030] In the description of the utility model, it is necessary to explain that, unless there is explicit provision and limitation, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.
[0031] As Figures 1 to 9As shown, a formaldehyde sterilizer according to this embodiment includes a frame 1, a sterilization chamber 2, a puncture structure 3, a vacuum pump 5, a formaldehyde purification structure 6, an air inlet filter 7, and a sealing cover for sealing the sterilization chamber 2. The sterilization chamber 2 has an exhaust port 21 and an air inlet 22. A first liquid inlet control valve 23 is installed on the sterilization chamber 2, and a first liquid evaporation box 25 is installed on the sterilization chamber 2. The first liquid inlet control valve 23 is connected to the first liquid evaporation box 25. The exhaust port 21... An air extraction solenoid valve 27 is installed on the upper part of the sterilization chamber 2, and an air intake solenoid valve 28 is installed on the air inlet 22. The output end of the puncture structure 3 is connected to the first liquid inlet control valve 23, and a first power pump is connected in series between the puncture structure 3 and the first liquid inlet control valve 23. One end of the vacuum pump 5 is connected to the air extraction solenoid valve 27, and the other end is connected to the formaldehyde purification structure 6. The air intake filter 7 is connected to the air intake solenoid valve 28. A detection sensor for detecting indoor pressure is installed on the sterilization chamber 2.
[0032] Furthermore, such as Figure 2 As shown, it also includes an internal circulation structure 8, which includes a formaldehyde decomposition chamber 81, a heat dissipation device 82, and an internal circulation fan 83; the upper end of the formaldehyde decomposition chamber 81 is connected to one end of the heat dissipation device 82, the other end of the heat dissipation device 82 is connected to one end of the internal circulation fan 83, and the other end of the internal circulation fan 83 is connected to the air inlet 22; the sterilization chamber 2 has a circulation inlet, and the lower end of the formaldehyde decomposition chamber 81 is connected to the circulation inlet. Figure 9 As shown, the formaldehyde decomposition chamber 81 includes a decomposition chamber housing 811, and an oxidation catalyst 11, a decomposition chamber heating assembly 812, and a decomposition chamber temperature sensor 813 installed within the decomposition chamber housing 811. The decomposition chamber heating assembly 812 is a heating tube. Figure 9 The arrows in the diagram indicate the direction of the airflow.
[0033] Furthermore, such as Figure 4 As shown, a first ball valve 84 is connected in series between the lower end of the formaldehyde decomposition chamber 81 and the upper circulation port, and a second ball valve 85 is connected in series between the other end of the internal circulation fan 83 and the air inlet 22.
[0034] Furthermore, such as Figure 5 , Figure 6As shown, the puncture structure includes a sealed container 31 for placing a formaldehyde tank, an electric push rod 32 and a puncture needle 33; the puncture needle 33 is installed at the output end of the electric push rod 32, a seal 34 cooperating with the puncture needle 33 is installed on the sealed container 31, the puncture needle 33 is moved in the sealed container 31 by driving of the electric push rod 32, and the output end of the sealed container 31 is communicated with the first liquid inlet control valve 23 through the first power pump. The sealed container 31 and the electric push rod 32 of the puncture structure 3 are both installed on a puncture frame, and the puncture frame is installed on the rack 1. The bottom of the sealed container 31 is provided with a liquid cavity, the output end of the sealed container 31 is opened on the liquid cavity, and one end of the first power pump is connected with the output end of the liquid cavity. In use, the formaldehyde tank containing formaldehyde is placed in the sealed container and sealed, the puncture needle 33 is driven by the electric push rod 32 to puncture the formaldehyde tank in the sealed container 31 through the seal 34, the puncture needle 33 is reset by the electric push rod 32 after puncturing, the formaldehyde liquid in the formaldehyde tank flows into the sealed container, and at the same time, the formaldehyde liquid in the sealed container 31 can be transported into the first liquid evaporation box 25 through the first power pump; when the formaldehyde liquid in the sealed container 31 is consumed, the sealed container 31 is opened for replacement of the formaldehyde tank. By this way, compared with opening the container containing formaldehyde and then pouring the formaldehyde into the corresponding container of the equipment, the safety hidden danger caused by adding formaldehyde to the equipment can be reduced.
[0035] Further, as shown in Figure 5 , a heating plate 35 is installed on the outer side wall of the sealed container 31.
[0036] Further, as shown in Figure 1 , the air inlet filter 7 is installed on one side of the formaldehyde purification structure 6.
[0037] Further, as shown in Figure 7 , the formaldehyde purification structure 6 includes a first purification chamber 61 and a second purification chamber 62, the first purification chamber 61 is provided with a communication port 63 communicated with the vacuum pump 5, the second purification chamber 62 is provided with an exhaust port 64, and the first purification chamber 61 is communicated with the second purification chamber 62. The first purification chamber 61 and the second purification chamber 62 are both installed with an oxidation catalyst 11, a purification chamber heating assembly 65 and a purification chamber temperature sensor 66. Figure 7 The arrows are the directions of air flow.
[0038] Further, as shown in Figure 2 , Figure 3 , it further includes an exhaust air fan 9 communicated with the exhaust port 64.
[0039] Further, it further includes a shell installed on the rack 1.
[0040] Further, as shown inFigure 4 As shown, the sterilization working chamber 2 is provided with a heating device 10 for heating the chamber.
[0041] Working principle: the medical instrument to be sterilized is placed in the sterilization working chamber 2, the closure cover is closed with the sterilization working chamber 2, the sterilization working chamber 2 is pumped by the vacuum pump 5, when the detection sensor detects that the pressure in the sterilization working chamber 2 reaches the preset threshold, the formaldehyde in the puncture structure 3 is introduced into the first liquid evaporation box 25 by the first power pump, then the formaldehyde liquid in the first liquid evaporation box 25 is heated and evaporated, so that the formaldehyde gas fills in the sterilization working chamber 2; all the gas in the sterilization working chamber 2 is pumped out to the formaldehyde purification structure 6 by the vacuum pump 5, and then purified again by the formaldehyde purification structure 6 and discharged to the air; at the same time, when the pressure is reduced by the initial pumping, the inlet electromagnetic valve 28 is closed to realize the pressure reduction in the sterilization working chamber 2; before the final exhaust, the inlet electromagnetic valve 28 is opened and the vacuum pump 5 works, so that the external air can enter the sterilization working chamber 2 after passing through the inlet filter 7 to ensure that the pressure in the sterilization working chamber 2 is in a normal state. By using the structure of the application, compared with mixing formaldehyde gas with low-temperature steam, the working steps are reduced, the working efficiency is improved, the response structure for generating steam and processing formaldehyde condensate is reduced, the cost is reduced, and the formaldehyde is directly heated and evaporated, which is more efficient; the formaldehyde purification structure 6 is used to purify the mixed gas to be discharged multiple times, so as to reduce the toxicity of the mixed gas to be discharged; the inlet filter 7 is arranged to filter the air entering the sterilization working chamber 2.
[0042] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A formaldehyde sterilizer characterized by: The sterilization device comprises a rack, a sterilization chamber, a puncture structure, a vacuum pump, a formaldehyde purification structure, an air inlet filter, and a sealing cover for sealing the sterilization chamber; the sterilization chamber is provided with an air outlet and an air inlet, and is provided with a first liquid inlet control valve and a first liquid evaporation box, the first liquid inlet control valve is communicated with the first liquid evaporation box, the air outlet is provided with an air outlet electromagnetic valve, and the air inlet is provided with an air inlet electromagnetic valve; the output end of the puncture structure is communicated with the first liquid inlet control valve, and a first power pump is connected in series between the puncture structure and the first liquid inlet control valve; one end of the vacuum pump is communicated with the air outlet electromagnetic valve, and the other end is communicated with the formaldehyde purification structure; the air inlet filter is communicated with the air inlet electromagnetic valve; and the sterilization chamber is provided with a detection sensor for detecting the pressure in the chamber.
2. A formaldehyde sterilizer according to claim 1, characterized in that: The sterilization device further comprises an internal circulation structure comprising a formaldehyde decomposition chamber, a heat dissipation device, and an internal circulation fan; the upper end of the formaldehyde decomposition chamber is communicated with one end of the heat dissipation device, the other end of the heat dissipation device is communicated with one end of the internal circulation fan, and the other end of the internal circulation fan is communicated with the air inlet; the sterilization chamber is provided with a circulation upper opening, and the lower end of the formaldehyde decomposition chamber is communicated with the circulation upper opening.
3. A formaldehyde sterilizer according to claim 2, characterized in that: A first ball valve is connected in series between the lower end of the formaldehyde decomposition chamber and the circulation upper opening, and a second ball valve is connected in series between the other end of the internal circulation fan and the air inlet.
4. A formaldehyde sterilizer according to claim 1, characterized in that: The puncture structure comprises a sealed container for placing a formaldehyde tank, an electric push rod, and a puncture needle; the puncture needle is installed at the output end of the electric push rod, the sealed container is provided with a sealing element matched with the puncture needle, the puncture needle moves in the sealed container under the driving of the electric push rod, and the liquid hole of the sealed container is communicated with the first liquid inlet control valve through the first power pump.
5. A formaldehyde sterilizer according to claim 4, characterized in that: A heating plate is installed on the outer side wall of the sealed container.
6. A formaldehyde sterilizer according to claim 1, characterized in that: The air inlet filter is installed on one side of the formaldehyde purification structure.
7. A formaldehyde sterilizer according to claim 1, characterized in that: The formaldehyde purification structure comprises a first purification chamber and a second purification chamber, the first purification chamber is provided with a communication opening communicated with the vacuum pump, the second purification chamber is provided with an exhaust opening, and the first purification chamber is communicated with the second purification chamber.
8. A formaldehyde sterilizer according to claim 7, characterized in that: A waste gas exhaust fan is further provided, which is communicated with the exhaust opening.
9. A formaldehyde sterilizer according to claim 1, characterized in that: A housing is further installed on the rack.
10. A formaldehyde sterilizer according to claim 1, characterized in that: A heating device is installed on the sterilization chamber for heating the chamber. A heating device is installed on the sterilization chamber for heating the chamber.