Air conditioner ventilation system and building

Abstract

The utility model provides an air conditioner ventilation system and a building. The air conditioner ventilation system comprises an air supply pipeline, at least one air supply branch pipe, an indoor air return pipeline, at least one air return branch pipe, an exhaust pipeline and at least one first room. The purification air conditioning unit provided with the first filtering device communicates with the indoor air return pipeline and the air supply pipeline, and the purification air conditioning unit is provided with a fresh air inlet. The first room communicates with the air supply pipeline through an air supply branch pipe provided with a second filtering device, and the first room communicates with the indoor air return pipeline through an air return branch pipe provided with a third filtering device. The air exhaust pipeline is communicated with the indoor air return pipeline and the air exhaust unit, and the air exhaust unit is provided with an air exhaust outlet. The air purifier can meet the requirements of specific indoor space for air quality and air purification, cross contamination of indoor air pollutants is avoided, and meanwhile the air pollutants are prevented from being discharged to the natural environment.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning and ventilation, and in particular to an air conditioning and ventilation system and a building. Background Art

[0002] Air conditioning systems are generally divided into comfort air conditioning systems and process air conditioning systems. Comfort air conditioning systems are mainly used to regulate indoor air temperature, thereby providing a comfortable working or living environment. Process air conditioning systems are mainly used to provide an indoor environment with special requirements for research, production, medical treatment or inspection processes, such as electronics workshops, pharmaceutical workshops, hospital operating rooms and microbiology laboratories. Process air conditioning systems can meet the comfort requirements of indoor occupants while ensuring process requirements such as room cleanliness and pollution prevention. However, while traditional process air conditioning systems can meet the control requirements of temperature and humidity, they cannot meet the air quality and air purification requirements of specific indoor spaces.

[0003] In view of this, it is necessary to design an air conditioning and ventilation system and building that can meet the air quality and air purification requirements of specific indoor spaces, avoid cross-contamination of indoor air pollutants, and prevent air pollutants from being discharged into the natural environment. Utility Model Content

[0004] The purpose of the utility model is to provide an air conditioning and ventilation system and a building to solve the problems of cross contamination of indoor air pollutants and pollution of the external environment in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides an air conditioning and ventilation system, comprising an air supply duct, at least one air supply branch, an indoor return air duct, at least one return air branch, an exhaust duct, and at least one first room. A purification air conditioning unit provided with a first filter device is connected to one end of the indoor return air duct and one end of the air supply duct, respectively, and the purification air conditioning unit is provided with a fresh air inlet; the first room is connected to the other end of the air supply duct via a supply air branch provided with a second filter device, and the first room is connected to the other end of the indoor return air duct via a return air branch provided with a third filter device; and one end of the exhaust duct is connected to the indoor return air duct, and the other end of the exhaust duct is connected to the exhaust unit, the exhaust unit is provided with an exhaust outlet, and the exhaust duct is provided at one end of the indoor return air duct away from the return air branch.

[0006] The technical solution disclosed in the present invention can meet the requirements of specific indoor spaces for air quality and air purification, avoid cross-contamination of indoor air pollutants, and prevent air pollutants from being discharged into the natural environment.

[0007] The above-mentioned air conditioning and ventilation system has multiple first rooms, multiple supply air branches, and multiple return air branches; and multiple second filter devices are respectively arranged on the supply air branches, and multiple third filter devices are respectively arranged on the return air branches.

[0008] The above-mentioned air conditioning and ventilation system also includes at least one second room and at least one third room. The second room is connected to the other end of the supply air duct through an air supply branch pipe equipped with a second filter device, and the third room is connected to the other end of the indoor return air duct through a return air branch pipe equipped with a third filter device.

[0009] The above-mentioned air-conditioning and ventilation system, the purification air-conditioning unit further includes: a fresh air filtration section provided with a fourth filter device, a fresh return air mixing section, a return air section provided with a return air fan, multiple intermediate sections, a cooling section provided with a surface cooling coil, a heating section provided with a heating coil, a humidification section provided with an electric humidifier, an air supply section provided with a blower, an air outlet filtration section provided with a first filter device, and an air supply outlet section.

[0010] In the above-mentioned air conditioning and ventilation system, the fresh air inlet is arranged on one side of the fresh air filtering section, one end of the indoor return air duct is connected to the return air inlet of the fresh return air mixing section, and one end of the supply air duct is connected to the supply air outlet of the supply air outlet section.

[0011] The above-mentioned air conditioning and ventilation system further includes at least one air supply regulating valve and at least one air supply sealing valve. The air supply regulating valve, the air supply sealing valve and the second filter device are arranged in sequence on the air supply branch pipe along the air flow direction; wherein, the second filter device is arranged on the air supply outlet connecting the air supply branch pipe and the first room, and a sensor is also provided in the first room, and the sensor is electrically connected to the air supply regulating valve.

[0012] The above-mentioned air conditioning and ventilation system further includes at least one return air regulating valve and at least one return air sealing valve. The third filter device, the return air sealing valve and the return air regulating valve are arranged in sequence on the return air branch pipe along the air flow direction, wherein the third filter device is arranged on the return air outlet connecting the return air branch pipe and the first room.

[0013] The above-mentioned air conditioning and ventilation system, the exhaust unit further includes: a first exhaust filter section provided with a fifth filter device, multiple intermediate sections, an exhaust section provided with an exhaust fan, a second exhaust filter section provided with a sixth filter device and an exhaust outlet section.

[0014] In the above-mentioned air conditioning and ventilation system, the other end of the exhaust duct is connected to the exhaust inlet of the first exhaust filter section, and the exhaust outlet is arranged on one side of the exhaust outlet section.

[0015] In the above-mentioned air-conditioning and ventilation system, a first regulating valve is respectively provided at one end of the indoor return air duct connected to the purification air-conditioning unit, one end of the supply air duct connected to the purification air-conditioning unit, the fresh air inlet, and one end of the exhaust duct connected to the exhaust unit; a second regulating valve, a sealed valve and a second filter device are sequentially provided along the direction of air flow at one end of the supply air branch pipe connected to the second room; a third filter device, a sealed valve and a second regulating valve are sequentially provided along the direction of air flow at one end of the return air branch pipe connected to the third room; and an exhaust check valve and a wind hood are also provided at the exhaust outlet.

[0016] In order to better achieve the purpose of the present invention, the present invention also provides a building equipped with the air conditioning and ventilation system as described above.

[0017] Of course, the building provided by the present invention corresponds to the above-mentioned air conditioning and ventilation system, and the beneficial technical effects are the same as above.

[0018] In order to better understand the above and other aspects of the present invention, embodiments are given below and described in detail with reference to the accompanying drawings, but they are not intended to limit the scope of patent protection of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of an air conditioning and ventilation system according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the functional sections of a purification air conditioning unit according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the functional sections of an exhaust fan unit according to an embodiment of the present invention.

[0022] Figure 4 This is a structural diagram of an air conditioning and ventilation system according to another embodiment of the present invention.

[0023] Wherein, the reference numerals:

[0024] 1000, 2000-air conditioning and ventilation systems

[0025] 1-Purification air conditioning unit

[0026] 10-Fresh air filtration section

[0027] 101-Fresh air inlet

[0028] 102-Fourth Filter Device

[0029] 11-New return air mixing section

[0030] 111-Return air inlet

[0031] 12-Return air section

[0032] 121-Return fan

[0033] 13-Middle section

[0034] 14-Cooling section

[0035] 141-Surface cooling coil

[0036] 15-Heating section

[0037] 151-Heating coil

[0038] 16-Humidification section

[0039] 161-Electric Humidifier

[0040] 17-Air supply section

[0041] 171-Blower

[0042] 18-Air outlet filter section

[0043] 181-First Filter Device

[0044] 19- Air supply and outlet section

[0045] 191-Air supply outlet

[0046] 2-Exhaust fan unit

[0047] 20-First exhaust filter section

[0048] 201-Exhaust inlet

[0049] 202-Fifth Filter Device

[0050] 21-Middle section

[0051] 22-Exhaust section

[0052] 221-Exhaust fan

[0053] 23-Filter section

[0054] 231-Sixth Filter Device

[0055] 24-Exhaust air outlet section

[0056] 241-Exhaust outlet

[0057] 3-Air supply duct

[0058] 4-Air supply branch pipe

[0059] 41-Second Filter Device

[0060] 42-Air supply sealing valve

[0061] 43-Air supply regulating valve

[0062] 44-Sensor

[0063] 5-Return air branch pipe

[0064] 51-Third Filter Device

[0065] 52-Return air sealing valve

[0066] 53-Return air regulating valve

[0067] 6-Indoor return air duct

[0068] 7-Exhaust duct

[0069] 8A-Room 1

[0070] 81A-Air outlet

[0071] 82A-Return air vent

[0072] 8B-Room 2

[0073] 81B-air outlet

[0074] 8C-Room 3

[0075] 81C-Return air vent

[0076] 90-First regulating valve

[0077] 91-Second regulating valve

[0078] 92-Sealed Valve

[0079] 93-Exhaust check valve

[0080] 94-Hood

[0081] D-air flow direction DETAILED DESCRIPTION

[0082] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and beneficial technical effects of the present invention, but it is not intended to limit the scope of protection of the claims attached to the present invention.

[0083] It should be noted that, in this specification, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0084] Certain terms are used in this specification and the appended claims to refer to specific components or parts. Those skilled in the art will understand that technology users or manufacturers may refer to the same component or part by different nouns or terms. This specification and the appended claims do not distinguish components or parts based on differences in name, but rather on differences in their function. Furthermore, the term "connected" as used herein encompasses both direct and indirect means of connection. Indirect means of connection include connection through other means.

[0085] In addition, in the description of the present invention, the terms "transverse", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and "approximately", or "approximately", "substantially", "left and right" and the like to indicate directions or positional relationships or parameters are all based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description content, and do not indicate or imply that the device or element referred to must have a specific direction, specific size or be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0086] The core of the present invention is to provide an air conditioning and ventilation system and a building that can meet the requirements of a specific indoor space for air quality and air purification, avoid cross-contamination of indoor air pollutants, and prevent air pollutants from being discharged into the natural environment.

[0087] See also Figure 1 , Figure 1 This is a structural diagram of an air conditioning and ventilation system according to an embodiment of the present invention.

[0088] The present invention provides an air conditioning and ventilation system 1000, comprising an air supply duct 3, at least one air supply branch duct 4, an indoor return air duct 6, at least one return air branch duct 5, an exhaust duct 7, and at least one first room 8A. A purification air conditioning unit 1, equipped with a first filter device, is connected to one end of the indoor return air duct 6 and one end of the air supply duct 3, respectively. The purification air conditioning unit 1 is provided with a fresh air inlet 101. The first room 8A is connected to the other end of the air supply duct 3 via the air supply branch duct 4 equipped with a second filter device 41. The first room 8A is connected to the other end of the indoor return air duct 6 via the return air branch duct 5 equipped with a third filter device 51. Furthermore, one end of the exhaust duct 7 is connected to the indoor return air duct 6, and the other end of the exhaust duct 7 is connected to the exhaust unit 2. The exhaust unit 2 is provided with an exhaust outlet 241. The exhaust duct 7 is located at the end of the indoor return air duct 6 away from the return air branch duct 5.

[0089] In one specific embodiment, in the air conditioning and ventilation system 1000, the number of the supply air branch 4, the return air branch 5, and the first room 8A are each one. The purification air conditioning unit 1 equipped with a first filter device is connected to the first room 8A via the supply air duct 3 and the supply air branch 4. The purification air conditioning unit 1 is also connected to the first room 8A via the indoor return air duct 6 and the return air branch 5, wherein the supply air branch 4 is provided with a second filter device 41, and the return air branch 5 is provided with a third filter device 51. The exhaust unit 2 is connected to the indoor return air duct 6 via the exhaust duct 7, and the exhaust duct 7 is provided at the end of the indoor return air duct 6 away from the return air branch 5. The purification air conditioning unit 1 is provided with a fresh air inlet 101, and the exhaust unit 2 is provided with an exhaust outlet 241.

[0090] When the air conditioning and ventilation system 1000 is running, the outdoor fresh air enters the purification air conditioning unit 1 through the fresh air inlet 101, and is mixed with the indoor return air that enters the purification air conditioning unit 1 through the indoor return air duct 6 in the purification air conditioning unit 1 and is filtered by the first filter device. The treated air is sent to the first room 8A through the supply air duct 3 and the supply air branch pipe 4, wherein the air is filtered again by the second filter device 41 in the supply air branch pipe 4. In addition, the return air in the first room 8A is filtered by the third filter device 51 on the return air branch pipe 5 and then enters the indoor return air duct 6, and then enters the purification air conditioning unit 1 again to mix with the outdoor fresh air. Part of the return air needs to be discharged to the outside, so part of the return air enters the exhaust unit 2 through the exhaust duct 7 and is then discharged through the exhaust outlet 241.

[0091] In the embodiment of the present utility model, by setting a first filter device, a second filter device 41 and a third filter device 51, the outdoor fresh air and the indoor return air are filtered and processed respectively in the mixing stage, the supply stage and the return stage, thereby avoiding cross-contamination of indoor air pollutants and avoiding the discharge of air pollutants into the natural environment.

[0092] As a preferred embodiment, the air conditioning and ventilation system 1000 further includes at least one air supply regulating valve 43 and at least one air supply sealing valve 42. The air supply regulating valve 43, the air supply sealing valve 42, and the second filter device 41 are sequentially arranged on the air supply branch pipe 4 along the airflow direction D. The second filter device 41 is arranged at the air supply port 81A connecting the air supply branch pipe 4 to the first room 8A. A sensor 44 is also arranged in the first room 8A and is electrically connected to the air supply regulating valve 43.

[0093] As a preferred embodiment, the air conditioning and ventilation system 1000 further includes at least one return air regulating valve 53 and at least one return air sealing valve 52. The third filter device 51, the return air sealing valve 52, and the return air regulating valve 53 are sequentially arranged on the return air branch pipe 5 along the airflow direction D. The third filter device 51 is arranged on the return air port 82A connecting the return air branch pipe 5 to the first room 8A.

[0094] In a specific embodiment, in the air conditioning and ventilation system 1000, the number of supply air regulating valves 43, supply air sealing valves 42, return air regulating valves 53, and return air sealing valves 52 corresponds to the number of supply air branch pipes 4, return air branch pipes 5, and first room 8A, and is one each. After entering the supply air branch pipe 4, air passes through the supply air regulating valve 43, supply air sealing valve 42, and second filter device 41 in sequence, and then enters the first room 8A through the supply air port 81A. In addition, the return air in the first room 8A enters the third filter device 51 of the return air branch pipe 5 through the return air port 82A, and then passes through the return air sealing valve 52 and return air regulating valve 53 in sequence before entering the indoor return air duct 6. The sensor 44 is a pressure sensor, but the present invention is not limited to this.

[0095] In the embodiment of the present invention, by setting the supply air regulating valve 43, the supply airtight valve 42, the return air regulating valve 53 and the return airtight valve 52, and by performing pressure monitoring through the sensor 44 set in the first room 8A, the air volume can be adjusted in real time to ensure the ventilation frequency and pressure requirements of the first room 8A, while preventing the leakage of pollutants in the air to cause air pollution.

[0096] As a preferred embodiment, the purification air conditioning unit 1 further includes: a fresh air filtration section 10 provided with a fourth filter device 102, a fresh return air mixing section 11, a return air section 12 provided with a return air fan 121, multiple intermediate sections 13, a cooling section 14 provided with a surface cooling coil 141, a heating section 15 provided with a heating coil 151, a humidification section 16 provided with an electric humidifier 161, an air supply section 17 provided with a blower 171, an air outlet filtration section 18 provided with a first filter device 181, and an air supply outlet section 19. Among them, the fresh air inlet 101 is provided on one side of the fresh air filtration section 10, one end of the indoor return air duct 6 is connected to the return air inlet 111 of the fresh return air mixing section 11, and one end of the air supply duct 4 is connected to the air supply outlet 191 of the air supply outlet section 19.

[0097] See also Figure 2 , Figure 2 This is a schematic diagram of the functional sections of a purification air conditioning unit according to an embodiment of the present invention.

[0098] In one specific embodiment, the purification air conditioning unit 1 is provided with, from left to right, a fresh air filtration section 10, a fresh return air mixing section 11, a return air section 12, an intermediate section 13, a cooling section 14, a heating section 15, a humidification section 16, an intermediate section 13, an air supply section 17, an intermediate section 13, an outlet air filtration section 18, and an air supply and outlet section 19. Furthermore, the fourth filter device 102 provided in the fresh air filtration section 10 is a G4-grade primary filter, the first filter device 181 provided in the outlet air filtration section 18 is an F7-grade medium-efficiency filter, and the number of return air fans 121 and supply air fans 171 is two, respectively, but the present invention is not limited to this.

[0099] When the air conditioning and ventilation system 1000 is in operation, outdoor fresh air enters the fresh air filtration section 10 of the purification air conditioning unit 1 through the fresh air inlet 101, where it is filtered. It is then mixed with the indoor return air entering the purification air conditioning unit 1 through the return air inlet 111 in the fresh return air mixing section 11. The air then undergoes temperature and humidity control in the return air section 12, the intermediate section 13, the cooling section 14, the heating section 15, the humidification section 16, the intermediate section 13, and the air supply section 17. Finally, the air enters the outlet filtration section 18 for filtration before being delivered to the air supply duct 4 through the air supply outlet 191.

[0100] In this embodiment of the utility model, the outdoor fresh air is filtered by the fourth filter device 102, and the mixed air of the outdoor fresh air and indoor return air is further filtered by the first filter device 181. This prevents cross-contamination of outdoor air pollutants with the indoor return air and prevents pollutants in the indoor return air from being recirculated into the first room 8A and causing secondary contamination. Furthermore, the cooling section 14, heating section 15, and humidification section 16 further regulate the air temperature and humidity, ensuring that the indoor cooling, heating, humidity, and fresh air loads meet the specified indoor air quality and environmental requirements.

[0101] As a preferred embodiment, the exhaust unit 2 further includes: a first exhaust filter section 20 equipped with a fifth filter device 202, multiple intermediate sections 21, an exhaust section 22 equipped with an exhaust fan 221, a second exhaust filter section 23 equipped with a sixth filter device 231, and an exhaust outlet section 24. The other end of the exhaust duct 7 is connected to the exhaust inlet 201 of the first exhaust filter section 20, and the exhaust outlet 241 is provided on one side of the exhaust outlet section 24.

[0102] In one specific embodiment, the exhaust unit 2 is provided with, from left to right, a first exhaust filter section 20, a middle section 21, an exhaust section 22, a middle section 21, a second exhaust filter section 23, and an exhaust outlet section 24. Specifically, the fifth filter device 202 disposed within the first exhaust filter section 20 is an H11-class sub-high efficiency filter, the sixth filter device 231 disposed within the second exhaust filter section 23 is an F5-class medium efficiency filter, and the number of exhaust fans 221 is two, but the present invention is not limited to this.

[0103] When the air conditioning and ventilation system 1000 is running, part of the indoor return air enters the first exhaust filter section 20 through the exhaust duct 7 and the exhaust inlet 201 for filtration, and then passes through the second exhaust filter section 23 for secondary filtration before being discharged to the outside through the exhaust outlet 241.

[0104] In the embodiment of the present utility model, the exhaust unit 2 performs secondary filtration on the indoor return air that needs to be discharged, which can prevent pollutants in the indoor return air from being discharged to pollute the natural environment.

[0105] As a preferred embodiment, there are multiple first rooms 8A, multiple supply air branch pipes 4, and multiple return air branch pipes 5; and, there are multiple second filter devices 41 and they are respectively arranged on the supply air branch pipes 4, and there are multiple third filter devices 51 and they are respectively arranged on the return air branch pipes 5.

[0106] Furthermore, it also includes at least one second room 8B and at least one third room 8C. The second room 8B is connected to the other end of the supply air duct 3 through the supply air branch 4 provided with a second filter device 41, and the third room 8C is connected to the other end of the indoor return air duct 6 through the return air branch 5 provided with a third filter device 51.

[0107] See also Figure 4 , Figure 4 This is a structural diagram of an air conditioning and ventilation system according to another embodiment of the present invention.

[0108] In a specific embodiment, Figure 4 As shown, the air conditioning and ventilation system 2000 provided by the present invention includes five first rooms 8A, seven supply air branches 4, and six return air branches 5. Seven second filter devices 41 are respectively arranged on the seven supply air branches 4, and six third filter devices 51 are respectively arranged on the six return air branches 5. In addition, the air conditioning and ventilation system 2000 also includes two second rooms 8B and one third room 8C. The third room 8C is arranged between the first room 8A and the second room 8B. The first room 8A is arranged on the right side of the third room 8C, and the second room 8B is arranged on the left side of the third room 8C, but the present invention is not limited to this. The two second rooms 8B are connected to the end of the supply air duct 3 away from the purification air conditioning unit 1 through two supply air branches 4 equipped with second filter devices 41, and the third room 8C is connected to the end of the indoor return air duct 6 away from the purification air conditioning unit 1 through the return air branch 5 equipped with third filter devices 51. Specifically, five second filter devices 41 are respectively installed at the air supply outlet 81A connecting the air supply branch 4 to the first room 8A; two second filter devices 41 are respectively installed at the air supply outlet 81B connecting the air supply branch 4 to the second room 8B; five third filter devices 51 are respectively installed at the return air outlet 82A connecting the return air branch 5 to the first room 8A; and one third filter device 51 is installed at the return air outlet 81C connecting the return air branch 5 to the third room 8C. It should be noted that the number of first room 8A, air supply branch 4, return air branch 5, second filter devices 41, third filter devices 51, second room 8B, and third room 8C can also be other numbers, and the present invention is not limited to this.

[0109] Air conditioning and ventilation system 2000 further includes five supply air regulating valves 43 and five supply air sealing valves 42. The supply air regulating valves 43 and the supply air sealing valves 42 are respectively disposed on the five supply air branch pipes 4 connected to the first room 8A. The supply air regulating valves 43, the supply air sealing valves 42, and the second filter device 41 are sequentially disposed on the supply air branch pipes 4 along the airflow direction D. A sensor 44 is also disposed in each first room 8A, and the sensor 44 is electrically connected to the supply air regulating valve 43. Furthermore, air conditioning and ventilation system 2000 further includes five return air regulating valves 53 and five return air sealing valves 52. The return air regulating valves 53 and the return air sealing valves 52 are respectively disposed on the five return air branch pipes 5 connected to the first room 8A. Furthermore, the third filter device 51, the return air sealing valve 52, and the return air regulating valve 53 are sequentially disposed on the return air branch pipes 5 along the airflow direction D.

[0110] The difference between the air conditioning and ventilation system 2000 and the air conditioning and ventilation system 1000 is that the air conditioning and ventilation system 2000 includes multiple rooms, and is respectively provided with a supply air branch pipe 4, a return air branch pipe 5, a second filter device 41, and a third filter device 51 in each room, making the air conditioning and ventilation system 2000 more suitable for specific indoor spaces with special requirements for air quality and air purification. Figure 4 Specifically, when air conditioning and ventilation system 2000 is used in a plant P3-level laboratory isolation greenhouse, second room 8B serves as the first locker room and shower room, third room 8C serves as the second locker room, and first room 8A serves as the clean corridor, first buffer room, first isolation greenhouse, second buffer room, and second isolation greenhouse, from left to right. The supply air control valve 43 is a variable air volume valve, the supply air sealing valve 42 is a biosafety sealing valve, the second filter device 41 is an H13-level high-efficiency filter and a barrier-type air filter with disinfection and leak detection functions. The return air control valve 53 is a constant air volume valve, the return air sealing valve 52 is a biosafety sealing valve, and the third filter device 51 is an H13-level high-efficiency filter and a barrier-type air filter with disinfection and leak detection functions. The air conditioning and ventilation system 2000 provided by the present invention can achieve an indoor environmental index of the first room 8A of 18-35°C ± 2°C and a relative humidity of 50-80% ± 5%, and a temperature of 18-30°C ± 2°C and a relative humidity of 50-70% ± 5%. The outdoor fresh air volume accounts for 20% of the total air supply volume. It should be noted that the air conditioning and ventilation systems 1000 and 2000 can also be used in electronics workshops, pharmaceutical workshops, hospital operating rooms, microbiology laboratories, and other scenarios with special requirements for the indoor environment, and the present invention is not limited to these.

[0111] In this embodiment of the utility model, by providing multiple regulating valves and sealing valves, different pressure gradients can be set for different rooms, achieving step-by-step negative pressure control. While ensuring airflow from outside to inside, the pressure in the first room 8A, which serves as the core room, is adjusted to the lowest point in the entire building pressure, and the first room 8A is set as a negative pressure purification area for the primary return air. In addition, the provision of the purification air conditioning unit 1, the second filter device 4, and the third filter device 51 further ensures that contaminants in each room will not cross-contaminate.

[0112] Please refer to Figure 1 and Figure 4 . As a preferred embodiment, one end of the indoor return air duct 6 connected to the purification air conditioning unit 1, one end of the supply air duct 3 connected to the purification air conditioning unit 1, the fresh air inlet 101, and one end of the exhaust duct 7 connected to the exhaust unit 2 are respectively provided with a first regulating valve 90. One end of the supply air branch pipe 4 connected to the second room 8B is provided with a second regulating valve 91, a sealed valve 92 and a second filter device 41 in sequence along the air flow direction D. One end of the return air branch pipe 5 connected to the third room 8C is provided with a third filter device 51, a sealed valve 92 and a second regulating valve 91 in sequence along the air flow direction D. In addition, the exhaust outlet 241 is also provided with an exhaust check valve 93 and a wind hood 94.

[0113] In a specific embodiment, the first regulating valve 90 is an electric air valve, the second regulating valve 91 is a constant air volume valve, and the sealing valve 92 is a biosafety sealing valve, but the present invention is not limited thereto.

[0114] In the embodiment of the present invention, the ventilation frequency and pressure requirements of the room can be further guaranteed by setting the first regulating valve 90, the second regulating valve 91 and the sealing valve 92. When the air conditioning and ventilation system 2000 includes multiple rooms, the pressure gradient between adjacent rooms can be adjusted.

[0115] The air conditioning and ventilation systems 1000 and 2000 provided by the present invention achieve multi-stage purification of outdoor fresh air and indoor return air by installing filtering devices in the air conditioning purification unit 1, the air supply branch 4, the return air branch 5, and the exhaust unit 2. In contrast, air conditioning and ventilation systems in the prior art cannot meet the air quality and air purification requirements of specific indoor spaces, causing cross-contamination of indoor air pollutants and pollution of the external environment. Therefore, the air conditioning and ventilation systems 1000 and 2000 provided by the present invention can meet the air quality and air purification requirements of specific indoor spaces, avoid cross-contamination of indoor air pollutants, and prevent air pollutants from being discharged into the natural environment.

[0116] In order to better achieve the purpose of the present invention, the present invention also provides a building, which is equipped with the air conditioning and ventilation systems 1000 and 2000 as described above.

[0117] In one specific embodiment, when the air conditioning and ventilation system 2000 is used in a P3-level laboratory isolation greenhouse for plants, the air supply duct 3, air supply branch pipe 4, and air supply vent 81A are positioned above the first room 8A to avoid affecting the plants' sunlight. The return air vent 82A is positioned below one side of the first room 8A to minimize short circuits, avoid dead zones, and ensure uniform airflow distribution and flow rate within the space. Furthermore, the exhaust unit 2 is located on the roof of the building, and the exhaust outlet 241 is at least 3 meters above the roof.

[0118] The above describes the air conditioning and ventilation system and building provided by the present invention in detail. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0119] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An air conditioning and ventilation system, comprising an air supply duct, at least one air supply branch, an indoor return air duct, at least one return air branch, an exhaust duct and at least one first room, characterized in that: A purification air conditioning unit provided with a first filtering device is respectively connected to one end of the indoor return air duct and one end of the supply air duct, and the purification air conditioning unit is provided with a fresh air inlet; The first room is connected to the other end of the air supply duct through the air supply branch provided with the second filter device, and the first room is connected to the other end of the indoor return air duct through the return air branch provided with the third filter device; and One end of the exhaust duct is connected to the indoor return air duct, and the other end of the exhaust duct is connected to the exhaust fan unit. The exhaust fan unit is provided with an exhaust outlet. The exhaust duct is arranged at one end of the indoor return air duct away from the return air branch pipe.

2. The air conditioning and ventilation system according to claim 1, characterized in that: There are multiple first rooms, multiple air supply branch pipes, and multiple return air branch pipes; and There are multiple second filter devices, which are respectively arranged on the air supply branch pipe, and there are multiple third filter devices, which are respectively arranged on the air return branch pipe.

3. The air conditioning and ventilation system according to claim 2, characterized in that: It also includes at least one second room and at least one third room, the second room is connected to the other end of the air supply duct through the air supply branch pipe provided with the second filter device, and the third room is connected to the other end of the indoor return air duct through the return air branch pipe provided with the third filter device.

4. The air conditioning and ventilation system according to claim 1, 2 or 3, characterized in that: The purification air conditioning unit further comprises: A fresh air filtering section with a fourth filtering device, a fresh return air mixing section, a return air section with a return air fan, multiple intermediate sections, a cooling section with a surface cooling coil, a heating section with a heating coil, a humidifying section with an electric humidifier, an air supply section with a blower, an air outlet filtering section with the first filtering device, and an air supply outlet section.

5. The air conditioning and ventilation system according to claim 4, characterized in that: The fresh air inlet is arranged on one side of the fresh air filtering section, one end of the indoor return air duct is connected to the return air inlet of the fresh return air mixing section, and one end of the supply air duct is connected to the supply air outlet of the supply air outlet section.

6. The air conditioning and ventilation system according to claim 1, 2 or 3, characterized in that: It further comprises at least one air supply regulating valve and at least one air supply sealing valve, wherein the air supply regulating valve, the air supply sealing valve and the second filter device are sequentially arranged on the air supply branch pipe along the air flow direction, wherein: The second filtering device is arranged on the air supply outlet of the air supply branch pipe communicating with the first room. A sensor is also arranged in the first room, and the sensor is electrically connected to the air supply regulating valve.

7. The air conditioning and ventilation system according to claim 1, 2 or 3, characterized in that: It further includes at least one return air regulating valve and at least one return air sealing valve, and the third filter device, the return air sealing valve and the return air regulating valve are arranged on the return air branch pipe in sequence along the air flow direction, wherein the third filter device is arranged on the return air outlet connecting the return air branch pipe and the first room.

8. The air conditioning and ventilation system according to claim 1, 2 or 3, characterized in that: The exhaust fan unit further comprises: A first exhaust filter section provided with a fifth filter device, a plurality of middle sections, an exhaust section provided with an exhaust fan, a second exhaust filter section provided with a sixth filter device, and an exhaust outlet section are provided.

9. The air conditioning and ventilation system according to claim 8, characterized in that: The other end of the exhaust duct is communicated with the exhaust inlet of the first exhaust filter section, and the exhaust outlet is arranged on one side of the exhaust outlet section.

10. The air conditioning and ventilation system according to claim 3, characterized in that: The end of the indoor return air duct connected to the purification air conditioning unit, the end of the air supply duct connected to the purification air conditioning unit, the fresh air inlet and the end of the exhaust duct connected to the exhaust unit are respectively provided with a first regulating valve; The end of the air supply branch pipe connected to the second room is provided with a second regulating valve, a sealing valve and the second filtering device in sequence along the air flow direction; The end of the return air branch pipe connected to the third room is provided with the third filter device, the sealing valve and the second regulating valve in sequence along the air flow direction; and the exhaust outlet is also provided with an exhaust check valve and a wind cap.

11. A building, characterized in that: An air conditioning and ventilation system according to any one of claims 1 to 10 is installed.

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