CN112460719A - A ventilation unit for hemopathy patient ward - Google Patents
A ventilation unit for hemopathy patient ward Download PDFInfo
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- CN112460719A CN112460719A CN202011574374.6A CN202011574374A CN112460719A CN 112460719 A CN112460719 A CN 112460719A CN 202011574374 A CN202011574374 A CN 202011574374A CN 112460719 A CN112460719 A CN 112460719A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- Mechanical Engineering (AREA)
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Abstract
The invention relates to a ventilation device for a sickroom of a hemopathy patient, which comprises the sickroom and a sickbed arranged in the sickroom, and comprises an air supply mechanism and an air exhaust mechanism; the air supply mechanism comprises an air supply outlet I and an air supply outlet III which are arranged at the top end of the ward, and an air supply outlet II and an air supply outlet IV which are arranged on the side wall of the ward, wherein air supply assemblies are arranged at the air supply outlet I, the air supply outlet II, the air supply outlet III and the air supply outlet IV; the air exhaust mechanism comprises an air exhaust port I and an air exhaust port II which are arranged at the bottom of the ward, and air exhaust assemblies are arranged at the air exhaust port I and the air exhaust port II; the ventilation device provided by the invention adopts the combined air supply mechanism and the air exhaust mechanism, improves indoor air flow, enables a pollution source to be positioned at a position close to the air exhaust port, forms induced air flow between the air supply port and the air exhaust port, is favorable for clearing indoor polluted air, can better protect medical personnel, and can utilize the induced air flow formed by air supply to send the polluted air to the air exhaust port to clear the polluted air.
Description
Technical Field
The invention belongs to the technical field of ward ventilation, and particularly relates to a ventilation device for a ward of a hemopathy patient.
Background
Hematological disorders refer to diseases that originate in the hematopoietic system or affect the hematopoietic system with abnormal changes in blood, characterized by anemia, bleeding, or fever. At present, the scientific technology is continuously developed, and the curative effect of bone marrow transplantation on treating malignant blood diseases, aplastic anemia, paroxysmal nocturnal hemoglobinuria and other congenital or hereditary diseases is continuously improved; the curative effects of large-dose chemotherapy for treating malignant hematological diseases and anti-thymocyte globulin/anti-lymphocyte globulin for treating severe aplastic anemia and the like are greatly improved. However, many patients with hematopathy have low immunity and neutropenia, and are often infected by the influence of the factors such as chemotherapy and radiotherapy. Infection is a common complication of diseases of the blood system, has great difficulty in clinical treatment and is one of the main causes of death. Therefore, enhancing the prevention and treatment of infectious complications is a key problem in improving the efficacy of hematological diseases.
Among the prior art, the main purpose of ventilating the ward is to get rid of the waste gas in the ward, ensure the necessary fresh air volume in ward, but there are a large amount of bacterium and dust in the air, under normal conditions, because the human body has immunity, so can not infected by the bacterium, nevertheless the patient that has the hematopathy, immunity is lower easily infected, the ward has a plurality of patients to live in under the normal condition simultaneously, still can lead to the cross infection between the patient if the ventilation effect is relatively poor, through the explanation of above-mentioned two kinds of circumstances, it is in time and effectual to the air that gets into the ward carry out disinfection and sterilization processing to guarantee that the patient is not infected.
Disclosure of Invention
The invention aims to solve the problems in the background technology, and provides a ventilation device for a sickroom of a hemopathy patient.
The purpose of the invention is realized as follows:
a ventilation device for a sickroom of a hemopathy patient comprises the sickroom and a sickbed arranged in the sickroom, and comprises an air supply mechanism arranged at the top in the sickroom and an air exhaust mechanism arranged at the bottom of the sickroom;
the air supply mechanism comprises an air supply outlet I which is arranged at the top end of the ward, is opposite to the bed tail of the sickbed, an air supply outlet III which is opposite to the bed side of the sickbed, an air supply outlet II which is arranged at the side wall of the sickroom, is opposite to the bed tail of the sickbed, and an air supply outlet IV which is opposite to the bed side of the sickbed, wherein air supply components are embedded into the air supply outlet I, the air supply outlet II, the air supply outlet III and the air supply outlet IV;
exhaust mechanism is including locating exhaust outlet one on the wall of the ward of the bottom in ward, the head of a bed department that corresponds the sick bed and the exhaust outlet two on the side wall of the ward in the bedside department that corresponds the sick bed, exhaust outlet one and exhaust outlet two department all imbeds and are equipped with the subassembly of airing exhaust.
Preferably, the air supply assembly is including locating the outer top in ward and with the kuppe of the inside intercommunication in ward, the inside of kuppe, along the outside orientation to inside in ward establish first fan, primary filter and air feed board in proper order.
Preferably, the air exhaust assembly comprises an air inlet pipe communicated with the interior of the ward and an air outlet pipe communicated with the exterior of the ward, and the air inlet pipe and the air outlet pipe are communicated through the sterilization assembly.
Preferably, the sterilization component comprises a treatment chamber with two ends respectively connected with an air inlet pipe and an air outlet pipe, and an ultraviolet lamp cavity, a medium efficiency filter, a second fan cavity, a pulse sterilization cavity, a high efficiency filter and a third fan cavity are sequentially arranged in the treatment chamber along the direction from the air inlet pipe to the air outlet pipe.
Preferably, a first valve is arranged on the air inlet pipe, a second valve is arranged on the air outlet pipe, an ozone generator is connected to the air inlet pipe between the first valve and the treatment chamber, and the ozone generator is communicated with the treatment chamber through the air inlet pipe.
Preferably, an ultraviolet germicidal lamp made of a mercury filled lamp tube is arranged inside the ultraviolet lamp cavity, and a pulse highlight germicidal lamp made of a xenon lamp tube is arranged inside the pulse germicidal cavity.
Preferably, the air guide sleeve adopts a clean airflow sleeve, and sealing rings are arranged at the joints of the air inlet pipe and the air outlet pipe with the sickroom.
Preferably, the air supply plate adopts a square air diffuser structure, the air supply volume and the air speed at the positions of the first air supply opening, the second air supply opening, the third air supply opening and the fourth air supply opening are the same, the air exhaust volume and the air speed at the positions of the first air exhaust opening and the second air exhaust opening are the same, and the air supply volume at the position of the first air supply opening is 350-370m3The air discharge quantity of the first air outlet is 350-370m3And h, the air supply speed at one position of the air supply outlet is 0.3-0.5 m/s.
Preferably, the sterilization efficiency eta of the pulse sterilization cavity to the air satisfies the following conditions:
η=1-C2/C1，C1concentration of planktonic bacteria (cfu/m) of air at input end of pulse sterilization chamber3），C2Concentration of planktonic bacteria (cfu/m) of air at output end of pulse sterilization cavity3）。
Preferably, the concentration C of planktonic bacteria in the air at the input end and the output end in the pulse sterilization cavity satisfies the following conditions:
C=N×105and the V/t, N is the total colony count (cfu) on the six-stage sampling flat plate, v is the flow rate (L/min) of sampled air, t is sampling time (min), the smaller the section of the air pipe is, the higher the pulse strong light irradiation intensity received by the air in the air pipe is, the higher the sterilization efficiency is, and the higher the sterilization efficiency is when the air flow rate flowing through the pulse sterilization chamber is 2-4m/s under the condition of the same air speed.
Preferably, under stable conditions, the ventilation efficiency W in the patient room satisfies:
W=Ce/Ci，Ceis the concentration (mol/m) of pollutants at the air outlet3），CiIs the concentration of pollutants in the ward room (mol/m)3）。
Preferably, the pollutant flow E (mol/s) at the air outlet satisfies the following conditions:
E=v·Cea, b and v are the average wind speed (m/s) at the air outlet, and a and b are the length (m) and height (m) of the air outlet button respectively.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a ventilation device for a sickroom of a hemopathy patient, which adopts a combined air supply mechanism and an air exhaust mechanism to improve indoor air flow, so that a pollution source is positioned at a position close to an air exhaust outlet, and simultaneously, induced air flow is formed between the air supply outlet and the air exhaust outlet, thus being beneficial to clearing indoor polluted air, not only providing better protection for medical personnel, but also utilizing the induced air flow formed by air supply to send the polluted air to the air exhaust outlet to clear the polluted air.
2. When the strong pulse light shines the treated object, the visible light, the infrared ray and the ultraviolet spectrum act on the microorganism in a synergic manner, the nucleic acid structure of the microorganism is damaged, and simultaneously, the protein, the cell membrane and other intracellular structures in the cells of the microorganism are damaged to a certain degree, so that the microorganism is killed.
3. The invention provides a ventilation device for a sickroom of a hemopathy patient, which utilizes a primary filter, a middle filter and a high-efficiency filter to carry out innocent filtration on exhaust air, thereby enabling the exhaust air to be discharged into the surrounding atmospheric environment harmlessly, simultaneously, the mode of using an ultraviolet lamp and a pulse sterilizing lamp to combine with an ozone generator to carry out disinfection and sterilization on the middle filter and the high-efficiency filter in an exhaust mechanism can also achieve the corresponding effect, and the ventilation device plays the roles of effectively protecting system operation managers and preventing viruses from diffusing to the surrounding in the system maintenance process.
4. When clean air sent by an air supply outlet passes through a working area and then reaches an air outlet, W is larger than 1, the low ventilation efficiency cannot indicate that the pollution concentration in the working area in the ward is low, the pollutant concentrations in the working area are compared in addition to the comparison of the ventilation efficiency, when different schemes are compared, the average concentration of pollutants in the working area is low, the ventilation effect is good, the highest concentration of pollutants in the working area is low, the risk of infection of medical personnel is low, and the pollutant flow quantity of the air outlet is high, the pollutant removal capacity is strong, so the highest concentration and the average concentration of the polluted air in the working area, the pollutant flow quantity of the air outlet and the ventilation efficiency are compared respectively, and the advantages and disadvantages of each combination mode are evaluated really and comprehensively.
Drawings
Fig. 1 is a schematic view of a ventilation device for a patient room of a hemopathy patient according to the present invention.
Fig. 2 is a schematic view of an air supply assembly of a ventilation unit for a patient's room of a hemotopathy patient according to the present invention.
Fig. 3 is a schematic view of a venting assembly of a ventilation device for a patient room of a hemotopathy patient according to the present invention.
In the figure: 1. a ward; 2. a hospital bed; 3. a first air supply outlet; 4. a third air supply outlet; 5. a second air supply outlet; 6. a fourth air supply outlet; 7. an air outlet I; 8. a second air outlet; 9. a pod; 10. a first fan; 11. a primary filter; 12. a blast plate; 13. an air inlet pipe; 14. a first valve; 15. an ozone generator; 16. a processing chamber; 161. an ultraviolet lamp chamber; 162. a medium-efficiency filter; 163. a second fan cavity; 164. a pulse sterilization cavity; 165. a high efficiency filter; 166. a third fan cavity; 17. an air outlet pipe; 18. and a second valve.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
Referring to fig. 1, a ventilation device for a sickroom of a hemopathy patient comprises a sickroom 1 and a sickbed 2 arranged in the sickroom 1, and comprises an air supply mechanism arranged at the top of the sickroom 1 and an air exhaust mechanism arranged at the bottom of the sickroom 1.
The air supply mechanism comprises an air supply outlet I3 which is arranged at the top end of the ward 1 and is opposite to the tail of the sickbed 2, an air supply outlet III 4 which is opposite to the side of the sickbed 2, an air supply outlet II 5 which is arranged at the side wall of the ward 1 and is opposite to the tail of the sickbed 2, and an air supply outlet IV 6 which is opposite to the side of the sickbed 2, wherein air supply assemblies are arranged at the air supply outlet I3, the air supply outlet II 5, the air supply outlet III 4 and the air supply outlet IV 6.
Exhaust mechanism is including locating exhaust outlet 7 on the wall of the ward 1 of the bottom in ward 1, the head of a bed department that corresponds sick bed 2 and exhaust outlet two 8 on the side wall of the ward 1 of the bedside department that corresponds sick bed 2, exhaust outlet 7 and exhaust outlet two 8 departments all are equipped with the subassembly of airing exhaust.
Adopt combination formula air supply mechanism and exhaust mechanism, improve indoor air current, make the pollution source be in the position near the air exit, form induced air current between air supply opening and air exit simultaneously, be favorable to cleaing away indoor contaminated air, can give medical personnel's better protection, can utilize the induced air current that the air supply formed again to send contaminated air to the air exit, clear away contaminated air.
When air supply airflow is arranged right at the bed tail and right at the bed side, an air supply outlet is respectively arranged right at the bed side and right at the bed tail, so that medical personnel can be protected better, polluted air can be supplied to an air outlet by utilizing induced airflow formed by air supply, polluted air is removed, air supply outlets I and III are used for curtain type air supply, the air supply outlets I and III are started, the polluted air is pushed to the air outlet by the airflow from the air supply outlets, the air flow is prevented from being broken, the air flow for exhausting is strengthened at the same time, the efficiency of removing the polluted air is ensured, the side air supply outlets are not used at the same time on two side walls at the bottom of a ward, namely the air supply outlets II and the air supply outlets IV are not selected at the same time.
Example 2
On the basis of example 1, the ventilation efficiency W in the ward under stable conditions satisfies: w = Ce/Ci，CeIs the concentration (mol/m) of pollutants at the air outlet3），CiIs the concentration of pollutants in the ward room (mol/m)3）。
The pollutant flow E (mol/s) at the air outlet satisfies the following conditions: e = v · CeA, b and v are the average wind speed (m/s) at the air outlet, and a and b are the length (m) and height (m) of the air outlet button respectively.
Because the pollutant concentration gradient exists, the pollutant concentration of the area close to the patient is higher, and the medical staff should keep a proper distance with the patient when nursing the patient, so when the air supply opening two and the air supply opening three-fan air outlet two are simultaneously started, the medical staff worksCO in crop area2The concentration is 0.029mol/m3-0.039mol/m3Meanwhile, the ventilation efficiency in the ward is the best.
Example 3
Combine fig. 2 and fig. 3, the air supply subassembly is including locating the outer top in ward 1 and with the kuppe 9 of the inside intercommunication in ward 1, the inside of kuppe 9, along the outside direction to inside in ward 1 establish first fan 10, primary filter 11 and air supply board 12 in proper order.
The air exhaust assembly comprises an air inlet pipe 13 communicated with the indoor space of the ward 1 and an air outlet pipe 17 communicated with the outdoor space of the ward 1, the air inlet pipe 13 and the air outlet pipe 17 are communicated through a sterilization component, the sterilization component comprises a processing chamber 16, two ends of the processing chamber are respectively connected with the air inlet pipe 13 and the air outlet pipe 17, an ultraviolet lamp cavity 161, a medium-efficiency filter 162, a second fan cavity 163, a pulse sterilization cavity 164, a high-efficiency filter 165 and a third fan cavity 166 are sequentially arranged in the processing chamber 16 along the direction from the air inlet pipe 13 to the air outlet pipe 17, an ultraviolet germicidal lamp made of a mercury filled lamp tube is arranged inside the ultraviolet lamp cavity 161, a pulse highlight germicidal lamp made of a xenon lamp tube is arranged inside the pulse germicidal cavity 164, the junction of air inlet pipe 13 and air outlet pipe 17 and ward 1 all is equipped with the sealing washer, all is equipped with brushless fan in second fan chamber 163 and the third fan chamber 166.
The primary, intermediate and high-efficiency filters are used for harmlessly filtering exhaust air, so that the exhaust air can be harmlessly exhausted into the surrounding atmospheric environment, meanwhile, the ultraviolet lamp and the pulse sterilizing lamp can achieve the corresponding effect in a mode of sterilizing the intermediate and high-efficiency filters in the exhaust mechanism, and the effects of effectively protecting system operation managers and preventing viruses from diffusing to the periphery in the system maintenance process are achieved.
When the object to be treated is flash-lighted by the strong pulse light, the visible light, the infrared ray and the ultraviolet spectrum act on the microorganism in a synergistic manner, the nucleic acid structure of the microorganism is damaged, and simultaneously, the protein, the cell membrane and other intracellular structures in the cells of the microorganism are damaged to a certain degree, so that the microorganism is killed.
Example 4
On the basis of example 3, theThe sterilization efficiency eta of the pulse sterilization cavity to the air meets the following requirements: eta =1-C2/C1，C1Concentration of planktonic bacteria (cfu/m) of air at input end of pulse sterilization chamber3），C2Concentration of planktonic bacteria (cfu/m) of air at output end of pulse sterilization cavity3）。
The concentration C of planktonic bacteria in the air of the input end and the output end in the pulse sterilization cavity meets the following requirements: c = N × 105And/vt, N is the total colony count (cfu) on the six-stage sampling plate, v is the flow rate of the sampled air (L/min), and t is the sampling time (min).
Under the condition of the same wind speed, the smaller the section of the air pipe is, the higher the pulse strong light irradiation intensity received by the air in the air pipe is, and the higher the sterilization efficiency is, and when the flow velocity of the air flowing through the pulse sterilization chamber is 2-4m/s, the sterilization efficiency is high.
Example 5
On the basis of embodiment 3, with reference to fig. 3, a first valve 14 is disposed on the air inlet pipe 13, a second valve 18 is disposed on the air outlet pipe 17, an ozone generator 15 is connected to the air inlet pipe 13 between the first valve 14 and the treatment chamber 16, and the ozone generator 15 is communicated with the treatment chamber 16 through the air inlet pipe 13.
When the ozone generator is used for disinfection, the first valve and the first valve are correspondingly closed, so that the whole disinfected clean air forms internal circulation through the second fan cavity of the treatment chamber and the air duct of the second fan cavity, the generated ozone is continuously brought out through the second fan cavity through circulating air, and the dead angle which cannot be irradiated by the ultraviolet lamp is thoroughly disinfected.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents and substitutions made within the scope of the present invention should be included.
Claims (7)
1. The utility model provides a ventilation unit for hemopathy patient ward, includes ward (1) and locates sick bed (2) in ward (1), its characterized in that: comprises an air supply mechanism arranged at the top in the ward (1) and an air exhaust mechanism arranged at the bottom of the ward (1);
the air supply mechanism comprises an air supply outlet I (3) which is arranged at the top end of the ward (1) and is opposite to the tail of the sickbed (2), an air supply outlet III (4) which is opposite to the side of the sickbed (2), an air supply outlet II (5) which is arranged on the side wall of the sickroom (1) and is opposite to the tail of the sickbed (2), and an air supply outlet IV (6) which is opposite to the side of the sickbed (2), wherein air supply assemblies are arranged at the air supply outlet I (3), the air supply outlet II (5), the air supply outlet III (4) and the air supply outlet IV (6);
exhaust mechanism is including locating exhaust outlet (7) on the bottom of ward (1), the wall of ward (1) of the head of a bed department that corresponds sick bed (2) and exhaust outlet two (8) on the side wall of ward (1) of the bedside department that corresponds sick bed (2), exhaust outlet (7) and exhaust outlet two (8) department all are equipped with the subassembly of airing exhaust.
2. A ventilation device for a patient's room for haemophilus patients according to claim 1, characterised in that: air supply assembly is including locating the outer top in ward (1) and with kuppe (9) of the inside intercommunication in ward (1), the inside of kuppe (9), along ward (1) outside to the inside direction establish first fan (10), primary filter (11) and air supply board (12) in proper order.
3. A ventilation device for a patient's room for haemophilus patients according to claim 1, characterised in that: the air exhaust assembly comprises an air inlet pipe (13) communicated with the indoor of the ward (1) and an air outlet pipe (17) communicated with the outdoor of the ward (1), and the air inlet pipe (13) and the air outlet pipe (17) are communicated through a sterilization assembly.
4. A ventilation device for a patient's room for haemophilus patients according to claim 3, characterised in that: the sterilizing component comprises a processing chamber (16) with two ends respectively connected with an air inlet pipe (13) and an air outlet pipe (17), and an ultraviolet lamp cavity (161), a medium-efficiency filter (162), a second fan cavity (163), a pulse sterilizing cavity (164), a high-efficiency filter (165) and a third fan cavity (166) are sequentially arranged inside the processing chamber (16) along the direction from the air inlet pipe (13) to the air outlet pipe (17).
5. A ventilation device for a patient's room for haemophilus patients according to claim 3, characterised in that: be equipped with valve one (14) on air-supply line (13), be equipped with valve two (18) on air-out pipe (17), be connected with ozone generator (15) on air-supply line (13) between valve one (14) and treatment chamber (16), ozone generator (15) pass through air-supply line (13) and treatment chamber (16) intercommunication setting.
6. A ventilation device for a patient's room for haemophilus patients according to claim 4, characterized in that: an ultraviolet germicidal lamp made of a water-filled silver lamp tube is arranged inside the ultraviolet lamp cavity (161), and a pulse highlight germicidal lamp made of a xenon lamp tube is arranged inside the pulse germicidal cavity (164).
7. A ventilation device for a patient's room for haemophilus patients according to claim 3, characterised in that: and sealing rings are arranged at the joints of the air inlet pipe (13) and the air outlet pipe (17) and the sickroom (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011574374.6A CN112460719A (en) | 2020-12-28 | 2020-12-28 | A ventilation unit for hemopathy patient ward |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011574374.6A CN112460719A (en) | 2020-12-28 | 2020-12-28 | A ventilation unit for hemopathy patient ward |
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| CN112460719A true CN112460719A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011574374.6A Pending CN112460719A (en) | 2020-12-28 | 2020-12-28 | A ventilation unit for hemopathy patient ward |
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| CN111486529A (en) * | 2020-03-25 | 2020-08-04 | 西安建筑科技大学 | Pathogenic microorganism prevention and control ward air directional transmission device and air sterilization and killing system |
| CN212204866U (en) * | 2020-04-30 | 2020-12-22 | 福州鹏飞制冷设备有限公司 | Hospital air conditioning system |
| CN212227271U (en) * | 2020-04-23 | 2020-12-25 | 蒋守森 | Ventilation unit is used with prevention branch of academic or vocational study to public health |
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2020
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004016649A (en) * | 2002-06-19 | 2004-01-22 | Sharp Corp | Method and unit for sterilization, and equipment, building, and movable body using the same |
| CN2712354Y (en) * | 2004-05-25 | 2005-07-27 | 曹国俊 | Negative pressure ventilating and disinfecting ward |
| CN1704691A (en) * | 2004-05-25 | 2005-12-07 | 曹国俊 | Sickroom with negative pressure ventilating and disinfecting system |
| JP2011004832A (en) * | 2009-06-24 | 2011-01-13 | Akitaka Furuya | Filter sterilizer |
| CN103234245A (en) * | 2013-05-13 | 2013-08-07 | 张传楣 | Air purifying device for lazaretto ward |
| CN208652798U (en) * | 2018-08-20 | 2019-03-26 | 陈志鑫 | A kind of weaving power houses cooling device |
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| CN212227271U (en) * | 2020-04-23 | 2020-12-25 | 蒋守森 | Ventilation unit is used with prevention branch of academic or vocational study to public health |
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