A central flue system for a building

Abstract

A central flue system of a building includes range hoods installed on different floors, the air outlet of each range hood is connected to a common flue through its own smoke pipe, an air outlet channel vertically connected to the outlet of the common flue is installed on the roof, and the characteristics are: the diameter of the air outlet channel is larger than the diameter of the common flue, at least two independently working flue fans are installed in the air outlet channel, and the flue fans are arranged near the inner wall of the air outlet channel and avoid the airflow discharged from the common flue outlet. The advantages of the present invention are: the outdoor smoke exhaust power of the central flue system of the building adopts a combination of multiple fans, the flue fans are arranged near the inner wall of the air outlet channel and avoid the airflow discharged from the common flue outlet, the arrangement of the fans is more reasonable and scientific, and can be suitable for various complex installation environments, the system has a small smoke exhaust resistance, the system has a higher smoke exhaust efficiency and energy saving, the system has a higher reliability, and the fan has a longer life.

Description

Technical Field

[0001] The invention relates to a flue system, in particular to a central flue system of a building. Background Art

[0002] At present, the floors of newly built buildings in cities are generally getting higher and higher. The outlets of high-rise public flues are generally set at the top of the floors. In order to ensure that the range hoods of users on each floor can exhaust smoke smoothly, a flue fan is generally installed at the outlet of the public flue. The flue fan is the main fan. When the flue fan is working, a negative pressure is formed at the outlet of the public flue. The range hoods on the user side are also equipped with fans, so that the oil smoke on the user side can be smoothly discharged through the public flue. The existing central flue system of the building only has one large flue fan installed at the outlet of the public flue. Even if only one or a few households in the whole building are turned on, the flue fan needs to be turned on frequently, resulting in a shortened motor life and low operating efficiency. In addition, the large flue fan is directly arranged at the flue outlet, which will cause greater exhaust resistance. In addition, in order to ensure the balance of air pressure in the kitchen, a kitchen air supply structure is also disclosed. However, the existing kitchen air supply structure generally requires power to be set at the air supply port for air supply, and the existing flue fan is mainly used for exhaust and cannot be used to supply air to the kitchen. In summary, the existing building central flue system needs to be further improved. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide a building central flue system that can eliminate the smoke exhaust resistance of the public flue and make the flue fan run more efficiently and energy-saving in response to the above-mentioned existing technical status.

[0004] The second technical problem to be solved by the present invention is to provide a building central flue system in which a flue fan can provide supplementary air power in response to the above-mentioned existing technical status.

[0005] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: the central flue system of the building includes range hoods installed on different floors, the air outlet of each range hood is connected to the public flue through its own smoke pipe, and an air outlet channel vertically connected to the outlet of the public flue is installed on the roof, characterized in that: the diameter of the air outlet channel is larger than the diameter of the public flue, at least two independently working flue fans are installed in the air outlet channel, and the flue fan is arranged near the inner wall of the air outlet channel and avoids the airflow discharged from the public flue outlet.

[0006] Preferably, the air outlet channel is a square channel, the flue fan is a vertically placed centrifugal fan, the back of the flue fan is close to the inner wall of the air outlet channel, and the air inlet of the flue fan faces the inside of the air outlet channel.

[0007] An air duct partition is installed inside the air outlet channel to isolate the air inlets of each flue fan from each other.

[0008] As a preferred solution, there are two flue fans, the air inlets of the flue fans are arranged opposite to each other, and the air duct partition is vertically arranged between the two flue fans.

[0009] As another preferred embodiment, there are three flue fans and they are arranged on the three side walls of the air outlet channel, there are two duct partitions and they are distributed in a T shape, the duct partitions divide the inside of the air outlet channel into three mutually isolated air inlet areas, and the air outlet of each flue fan corresponds one by one to the air inlet area.

[0010] As another preferred embodiment, there are four flue fans which are correspondingly arranged on the four side walls of the air outlet channel, there are two duct partitions which cross in an X shape, and the duct partitions divide the interior of the air outlet channel into four mutually isolated air inlet areas, and the air outlet of each flue fan corresponds one-to-one to the air inlet area.

[0011] As another preferred embodiment, there are four flue fans which are correspondingly arranged on the four side walls of the air outlet channel, there are three duct partitions which are distributed in an H shape, and the duct partitions divide the interior of the air outlet channel into four mutually isolated air inlet areas, and the air outlet of each flue fan corresponds one-to-one to the air inlet area.

[0012] The air outlet of the flue fan may have various orientations, and a preferred solution is that the air outlet of the flue fan faces upward.

[0013] Another preferred solution for the air outlet is that the air outlet direction of the air outlet of the flue fan is horizontal, and air outlet holes corresponding to the air outlet are opened on the side walls of the air outlet channel.

[0014] Further preferably, a check valve is installed at the air outlet of the flue fan.

[0015] In order to reduce the noise of the flue fan during operation, a noise reduction and silencer is installed between the back of the flue fan and the inner wall of the air outlet channel.

[0016] Further preferably, a top cover plate is installed at the top center of the air outlet channel.

[0017] In order to purify the oil fume exhausted from the air outlet channel, an oil fume filtering device is installed in the air outlet channel, and the oil fume filtering device is located at the front end of the air inlet of the flue fan.

[0018] The technical solution adopted by the present invention to solve the second technical problem is as follows: the range hood of the central flue system of the building is a non-powered range hood, and an air supply port connected to the outside air is opened on the kitchen wall, and the air supply port is connected to the public flue through the internal space of the kitchen, the internal air duct of the range hood and the smoke pipe in sequence. In this way, the flue fan can provide air supply power, and after air is supplied through the air supply port, the air pressure balance in the kitchen can be ensured, reducing the interference of the external flow field on the smoke extraction.

[0019] It is further preferred that an electric air volume distribution valve is installed on the smoke pipe of each range hood, and a host electronic control device that can receive the signal sent by the electric air volume distribution valve and then control the flue fan is installed on the roof. In this way, through the real-time communication between the indoor electric valve and the rooftop control center, it is convenient to monitor and manage the system, and the rooftop control center communicates with the cloud platform in real time, and can feed back the operating status to the cloud platform in real time, so as to realize the monitoring of the host, data collection, pre-maintenance, etc.

[0020] It is further preferred that an air quality sensor is installed on the range hood, and the air quality sensor can transmit the output signal to the electric air volume distribution valve. When the air quality exceeds the standard, the host electronic control device can receive the corresponding signal sent by the electric air volume distribution valve and start the flue fan. In this way, the air quality sensor can detect the indoor air quality in real time. During the non-cooking peak period, when the air quality exceeds the standard, the air volume electric distribution valve is started, and a signal is sent to the host electronic control device to start the flue fan for ventilation. The outdoor fresh air enters the room from the air supply port until the air quality reaches the standard.

[0021] In order to detect the flow rate of each range hood, an air volume sensor or a pressure sensor is installed on the smoke pipe of each range hood.

[0022] In order to prevent rainwater and external airflow from entering the common flue, a top hood is installed above the top of the air outlet channel.

[0023] Compared with the prior art, the advantages of the present invention are: the outdoor smoke exhaust power of the central flue system of the building adopts a combination of multiple fans, the flue fan is arranged near the inner wall of the air outlet channel and avoids the airflow discharged from the public flue outlet, the fan arrangement is more reasonable and scientific, and can be suitable for various complex installation environments, the system has a small smoke exhaust resistance, the system has a higher smoke exhaust efficiency, is more energy-saving, the system is more reliable, and the fan life is longer. In addition, by setting an air supply port in the kitchen, the kitchen can always maintain air pressure balance, and even if the doors and windows are not opened, the fresh air required for the stove combustion can be effectively supplemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0025] Figure 2 It is a schematic diagram of a partial structure of the first embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the installation structure of the flue fan and the flue baffle according to the first embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the installation structure of the flue fan and the flue baffle according to the second embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the installation structure of the flue fan and the flue baffle according to the third embodiment of the present invention;

[0029] Figure 6 Schematic diagram of the installation structure of the flue fan and the flue baffle according to the fourth embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of Embodiment 5 of the present invention;

[0031] Figure 8 It is a partial structural diagram of the fifth embodiment of the present invention;

[0032] Fig. 9 This is a schematic diagram of the installation structure of the flue fan and the flue baffle of Example 5 of the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings.

[0034] Embodiment 1:

[0035] like Figures 1 to 3 As shown, the building central flue system of this embodiment includes range hoods 1 installed on different floors, the air outlet of each range hood 1 is connected to the public flue 3 through its own smoke pipe 2, and an air outlet channel 4 vertically connected to the outlet of the public flue 3 is installed on the roof. The diameter of the air outlet channel 4 is larger than the diameter of the public flue 3, and the flue fan 5 is arranged at a position close to the inner wall of the air outlet channel and avoids the airflow discharged from the outlet of the public flue 3, thereby reducing the smoke exhaust resistance of the system.

[0036] In this embodiment, the air outlet channel 4 is a square channel, the flue fan 5 is a vertically placed centrifugal fan, and the back of the flue fan 5 is close to the inner wall of the air outlet channel 4. In order to reduce the working noise of the flue fan 5, a noise reduction and silencer 8 is installed between the back of the flue fan 5 and the inner wall of the air outlet channel 4. In order to consider the problem of high noise on the roof caused by multiple fans, a shock absorbing device 16 can be installed at the bottom of the air outlet channel 4. In order to purify the oil smoke, the central flue system is equipped with an oil smoke filter 10 in the air outlet channel 4, and the oil smoke filter 10 is located at the front end of the air inlet of the flue fan 5.

[0037] In this embodiment, the air inlet 51 of the flue fan 5 faces the inside of the air outlet 4, and the air outlet direction of the air outlet of the flue fan 5 faces upward. There are four flue fans 5 and they are correspondingly arranged on the four side walls of the air outlet 4, and the four flue fans 5 work independently. An air duct partition 6 is installed inside the air outlet 4. In this embodiment, there are two air duct partitions 6 and they cross in an X shape. The air duct partition 6 divides the inside of the air outlet 4 into four mutually isolated air inlet areas 7, and the air outlet of each flue fan 5 corresponds to the air inlet area 7 one by one. In addition, a top cover plate 9 is installed at the top center of the air outlet 4. On the one hand, the top cover plate 9 can prevent the airflows of the air outlets 52 of each flue fan 5 from interfering with each other, and on the other hand, it can also prevent the external airflow from flowing back into the common flue 3. In order to further prevent rainwater and external airflow from entering the common flue 3, a top wind cap 20 is installed above the top of the air outlet 4.

[0038] In the case where the range hood 1 of this embodiment adopts a fan without power or with low counterweight performance parameters, the flue fan 5 forms the main power source for smoke exhaust. An air supply port 12 connected to the outside air is opened on the kitchen wall 11. The air supply port 12 is connected to the public flue 3 through the internal space of the kitchen, the internal air duct of the range hood 1 and the smoke pipe 2 in turn, so that air can be supplied to the kitchen through the air supply port 12. After the air is supplied through the air supply port 12, the air pressure balance in the kitchen can be ensured, and the interference of the external flow field on the oil smoke can be reduced. In addition, a filter 17 can be set at the air supply port 12 to purify the air supplied to the kitchen.

[0039] The central flue system is equipped with an electric air volume distribution valve 13 on the smoke pipe 2 of each range hood 1. The electric air volume distribution valve 13 has a wireless transmission module. A host electronic control device 14 is installed on the roof. The electric air volume distribution valve 13 communicates with the host electronic control device 14 in real time. The host electronic control device 14 has a wireless receiving module. The wireless receiving module receives the signal sent by the wireless transmission module. The host electronic control device 14 communicates with the cloud platform 18 in real time. According to the received signal, the electric air volume distribution valve 13 and the flue fan 5 are controlled to monitor and manage the system, realize air volume distribution and pre-maintenance, big data collection, etc. In order to detect the flow of each range hood, an air volume sensor 15 or a pressure sensor is installed on the smoke pipe 2 of each range hood 1. In addition, the same as the existing structure, a fire damper 19 is installed at the outlet end of the smoke pipe 2 of each range hood 1.

[0040] In addition, the central flue system can also replenish the kitchen air as needed. Specifically, an air quality sensor (not shown) is installed on the range hood 1, and the air quality sensor can transmit the output signal to the electric air volume distribution valve 13. When the air quality exceeds the standard, the electric air volume distribution valve 13 starts and sends a corresponding signal to the host electronic control device 14, and the host electronic control device 14 then starts the flue fan 5 for ventilation, and the outdoor fresh air enters the kitchen from the air supply port 12 until the kitchen air quality meets the standard.

[0041] Embodiment 2:

[0042] like Figure 4 As shown, in this embodiment, there are also four flue fans 5 of the central flue system and they are correspondingly arranged on the four side walls of the air outlet channel 4. The difference from the first embodiment is that the distribution of the air duct baffles 6 is different. In this embodiment, there are three air duct baffles 6 and they are distributed in an H shape. The air duct baffles 6 divide the inside of the air outlet channel 4 into four mutually isolated air inlet areas 7. The air outlet of each flue fan 5 corresponds to the air inlet area 7 one by one. The rest of the structure of this embodiment is the same as that of the first embodiment and will not be described in detail here.

[0043] Embodiment three:

[0044] like Figure 5 As shown, in this embodiment, there are three flue fans 5 of the central flue system and they are arranged on the three side walls of the air outlet channel 4, there are two air duct partitions 6 and they are distributed in a T shape, the air duct partitions 6 divide the inside of the air outlet channel 4 into three mutually isolated air inlet areas 7, and the air outlet of each flue fan 5 corresponds to the air inlet area 7 one by one. The rest of the structure of this embodiment is the same as that of the first embodiment, and will not be described in detail here.

[0045] Embodiment 4:

[0046] like Figure 6As shown, in this embodiment, the central flue system has two flue fans 5, the air inlets of the flue fans 5 are arranged opposite to each other, and the air duct partition 6 is vertically arranged between the two flue fans 5. The rest of the structure of this embodiment is the same as that of the first embodiment, and will not be described in detail here.

[0047] Embodiment five:

[0048] like Figures 7 to 9 As shown, in this embodiment, there are also four flue fans 5 of the central flue system and they are correspondingly arranged on the four side walls of the air outlet channel 4. The difference from the first embodiment is that the direction of the air outlet 52 of the flue fan 5 is different. In this embodiment, the air outlet direction of the air outlet 52 of the flue fan 5 is horizontal, and a check valve plate 53 is installed at the air outlet 52 of the flue fan 5, and air outlet holes 41 corresponding to the air outlet 52 are opened on the side wall of the air outlet channel 4, so that the smoke discharged from the air outlet of the flue fan 5 can be smoothly discharged to the outside through the air outlet holes 41.

Claims

1. A central flue system of a building, comprising range hoods (1) installed on different floors, the air outlet of each range hood (1) being connected to a common flue (3) through a respective flue pipe (2), and an air outlet channel (4) being installed on the roof of the building and being vertically connected to the outlet of the common flue (3), characterized in that: The diameter of the air outlet channel (4) is larger than the diameter of the common flue (3). At least two independently working flue fans (5) are installed in the air outlet channel (4). The flue fans (5) are arranged near the inner wall of the air outlet channel (4) and avoid the airflow discharged from the common flue (3). The air outlet channel (4) is a square channel. The flue fan (5) is a vertically placed centrifugal fan. The back of the flue fan (5) is near the inner wall of the air outlet channel (4). The air inlet (51) of the flue fan (5) faces the inside of the air outlet channel. A duct partition (6) is installed inside the air outlet channel (4) to isolate the air inlets (51) of each flue fan (5) from each other. The range hood (1) is a non-powered range hood. A An air supply port (12) is connected to the outside air, the air supply port (12) is connected to the common flue (3) through the internal space of the kitchen, the internal air duct of the range hood (1) and the flue pipe (2) in sequence, an electric air volume distribution valve (13) is installed on the flue pipe (2) of each range hood (1), a host electronic control device (14) is installed on the roof, and the host electronic control device (14) is capable of receiving a signal from the electric air volume distribution valve (13) and thus controlling the flue fan (5), an air quality sensor is installed on the range hood (1), and the air quality sensor is capable of transmitting an output signal to the electric air volume distribution valve (13), and when the air quality exceeds the standard, the host electronic control device (14) is capable of receiving a corresponding signal from the electric air volume distribution valve (13) and starting the flue fan (5).

2. The building central flue system according to claim 1, characterized in that: There are two flue fans (5), the air inlets (51) of the flue fans (5) are arranged opposite to each other, and the air duct partition plate (6) is vertically arranged between the two flue fans (5).

3. The building central flue system according to claim 1, characterized in that: There are three flue fans (5) arranged on three side walls of the air outlet channel (4), there are two air duct partitions (6) arranged in a T-shape, the air duct partitions (6) divide the interior of the air outlet channel (4) into three mutually isolated air inlet areas (7), and the air outlet of each flue fan (5) corresponds one-to-one to the air inlet area (7).

4. The building central flue system according to claim 1, characterized in that: There are four flue fans (5) which are correspondingly arranged on the four side walls of the air outlet channel (4); there are two air duct partitions (6) which cross each other in an X shape; the air duct partitions (6) divide the interior of the air outlet channel (4) into four mutually isolated air inlet areas (7); and the air outlet of each flue fan (5) corresponds one-to-one to the air inlet area (7).

5. The building central flue system according to claim 1, characterized in that: There are four flue fans (5) which are correspondingly arranged on the four side walls of the air outlet channel (4); there are three air duct partitions (6) which are distributed in an H shape; the air duct partitions (6) divide the interior of the air outlet channel (4) into four mutually isolated air inlet areas (7); and the air outlet of each flue fan (5) corresponds one-to-one to the air inlet area (7).

6. The building central flue system according to claim 1, characterized in that: The air outlet (52) of the flue fan (5) faces upward.

7. The building central flue system according to claim 1, characterized in that: The air outlet (52) of the flue fan (5) has an air outlet direction that is horizontal, and air outlet holes (41) corresponding one-to-one to the air outlet (52) are provided on the side wall of the air outlet channel (4).

8. The building central flue system according to claim 7, characterized in that: A check valve plate (53) is installed at the air outlet (52) of the flue fan (5).

9. The building central flue system according to claim 1, characterized in that: A noise reduction and silencer device (8) is installed between the back of the flue fan (5) and the inner wall of the air outlet channel (4).

10. The building central flue system according to claim 1, characterized in that: A top cover plate (9) is installed at the top center of the air outlet channel (4).

11. The building central flue system according to claim 1, characterized in that: An oil fume filter device (10) is installed in the air outlet channel (4), and the oil fume filter device (10) is located at the front end of the air inlet of the flue fan (5).

12. The building central flue system according to claim 1, characterized in that: An air volume sensor (15) or a pressure sensor is installed on the smoke pipe (2) of each range hood (1).

13. The building central flue system according to claim 1, characterized in that: A top hood (20) is installed above the top of the air outlet channel (4).

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