Air guiding device for heating, ventilation and air conditioning

Abstract

This utility model proposes an air diversion device for HVAC systems, relating to the field of HVAC technology. It includes a diversion hood, mounting plate, filter screen, air collection hood, guide pipe, partition, diversion mechanism, circulation assembly, motor, gears, and closing plate. It also includes a rectangular hole, air inlet channel, air inlet pipe, electric valve, common pipeline, and air diversion pipe. This application allows air conditioning air to be introduced sequentially through multiple sub-areas of the filter screen (while one area is being introduced, the remaining areas are closed). When a sub-area becomes blocked, the device can automatically detect the pressure difference and switch to another adjacent sub-area for air diversion. This significantly improves the overall utilization rate of the filter screen and reduces the frequency of subsequent cleaning and maintenance, thereby improving the air diversion effect of the HVAC system.

Description

Technical Field

[0001] This utility model relates to the field of heating, ventilation and air conditioning technology, and more specifically, to an air diversion device for heating, ventilation and air conditioning. Background Technology

[0002] Heating, ventilation and air conditioning (HVAC) is an air conditioner with heating, ventilation and air conditioning functions. After the air enters the outdoor unit of the air conditioner, in addition to introducing fresh air, the air can be cooled and then filtered before being introduced into the room. However, in the existing technology, the air in HVAC is introduced into the room through the air intake device but cannot be exhausted from the room, which is not conducive to the circulation of indoor air.

[0003] Announcement No. CN221483822U proposes an air diversion device for HVAC, which can effectively circulate indoor air conditioning. However, when filtering the blown air conditioning air, the local load on the filter screen is relatively large, while most other areas do not achieve the filtering effect. Therefore, the effective utilization rate of the filter screen is low, and the air diversion effect of HVAC needs to be improved. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to propose an air diversion device for HVAC systems.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An air diversion device for heating, ventilation, and air conditioning systems includes a diversion hood, a mounting plate, a filter screen, an air collecting hood, a guide pipe, a partition, a diversion mechanism, a circulation assembly, a motor, gears, and a closing plate. It also includes a rectangular opening, an air inlet channel, an air inlet pipe, an electric valve, a common piping, and an exhaust pipe.

[0007] Several rectangular holes are equidistantly arranged on the mounting plate and are connected to the filter screen;

[0008] The air inlet channel, which is narrower at the top and wider at the bottom, corresponds one-to-one with the rectangular holes, and the bottom end of the air inlet channel is consistent with the shape and size of the rectangular holes and is welded and fixed.

[0009] The top of the air inlet pipe and the air inlet channel are integrally formed, and each air inlet pipe is equipped with an independently operating electric valve.

[0010] The common pipeline is connected to several air inlet ducts;

[0011] The exhaust duct is connected to the public pipeline.

[0012] Furthermore, it also includes differential pressure sensors that correspond one-to-one with the air inlet channels and are installed on the air inlet channels. The high-pressure end of the differential pressure sensor is connected to the air inlet pipe, and the low-pressure end of the differential pressure sensor is connected to the measuring point of the air collector hood.

[0013] Furthermore, a reference pressure sensor is installed on the air collection shroud as a low-pressure reference for all air intake channels.

[0014] Furthermore, the electric valve is an electric butterfly valve.

[0015] Furthermore, it also includes relays, timers, and a PLC control panel. The differential pressure sensor, timer, relay, and electric valve are all electrically connected to the PLC control panel.

[0016] Furthermore, an audible and visual alarm is fixedly mounted on the mounting plate and electrically connected to the PLC control panel.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] Compared to existing technologies, this application can sequentially introduce air conditioning air through multiple sub-areas of the filter (while one area is being introduced, the remaining areas are closed). When a sub-area becomes blocked, the pressure difference can be automatically detected and another adjacent sub-area can be switched to draw air. As a result, the overall utilization rate of the filter is significantly improved and the frequency of subsequent cleaning and maintenance is reduced, thereby improving the airflow effect of the HVAC system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of a rectangular hole;

[0021] Figure label:

[0022] 1. Mounting plate; 2. Filter screen 1; 3. Rectangular hole; 4. Air inlet channel; 5. Air inlet pipe; 6. Electric valve; 7. Common pipeline; 8. Exhaust pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0024] like Figure 1 and Figure 2As shown, an air diversion device for HVAC includes a diversion hood, a mounting plate 1, a filter screen 2, an air collecting hood, a guide pipe, a partition, a diversion mechanism, a circulation assembly, a motor, gears, and a closing plate (all of the above structures are fully disclosed in the publication number CN221483822U, which discloses an air diversion device for HVAC, and will not be described in this application). It also includes a rectangular hole 3, an air inlet channel 4, an air inlet pipe 5, an electric valve 6, a common pipeline 7, and an air diversion pipe 8.

[0025] Several rectangular holes 3 are equidistantly opened on the mounting plate 1 and are connected to the filter screen 2;

[0026] The air inlet channel 4, which is narrow at the top and wide at the bottom, corresponds one-to-one with the rectangular hole 3, and the bottom end of the air inlet channel 4 has the same shape and size as the rectangular hole 3 and is welded and fixed.

[0027] The top of the air inlet pipe 5 and the air inlet channel 4 are integrally formed, and each air inlet pipe 5 is equipped with an independently operating electric valve 6 (specifically an electric butterfly valve).

[0028] The common duct 7 is connected to several air inlet ducts 5;

[0029] The exhaust duct 8 connects to the public pipeline 7.

[0030] In order to automatically detect whether a certain local area of ​​the filter is blocked, the above embodiment further optimizes the solution by including a differential pressure sensor that corresponds one-to-one with the air inlet channel 4 and is installed on the air inlet channel 4. The high pressure end of the differential pressure sensor is connected to the air inlet pipe 5, and the low pressure end of the differential pressure sensor is connected to the measuring point of the air collector hood.

[0031] In order to eliminate the problem of multi-sensor reference drift, a reference pressure sensor is installed on the air shroud to provide a unified low-pressure reference for all channels. This design makes the differential pressure data of each channel comparable and reduces errors.

[0032] To automatically replace the induced draft filter area and avoid localized clogging and overload of the filter screen, which would prevent stable subsequent induced draft, the above-described embodiment is further optimized by including relays, timers, and a PLC control panel. The differential pressure sensor, timer, relay, and electric valve 6 are all electrically connected to the PLC control panel.

[0033] To automatically prompt relevant personnel to maintain, clean, or replace the filter screen after all filtration areas are completely clogged, the above embodiment is further optimized by installing an audible and visual alarm on the mounting plate 1, which is electrically connected to the PLC control panel. The differential pressure sensor, reference pressure sensor, relay, timer, PLC control panel, and audible and visual alarm are not shown in the figure.

[0034] The working process of this utility model is as follows:

[0035] First, the air conditioning air is blown into the common duct 7 from the air intake duct 8. Initially, the electric valve 6 on the far left is opened by the PLC control panel, while the other electric valves 6 are closed. Then the air conditioning air can flow through the local area of ​​the filter screen (that is, the filter screen area corresponding to the first rectangular hole 3 on the far left), and then blow into the air collection hood. Then the guide pipe guides the air into the air diversion mechanism, which facilitates the direction and diversion control of the air.

[0036] As the airflow continues, the first localized area of ​​the filter screen gradually becomes clogged. During this process, the differential pressure sensor installed on the corresponding air inlet duct 4, in conjunction with the reference pressure sensor installed on the air collector hood, automatically detects the air pressure on the front and back sides of the filter screen. If the difference between the two exceeds a pre-set threshold in the controller (specifically, greater than 150 Pa), a timer starts counting. When the timer exceeds the pre-set time period (greater than 10 seconds), the timer sends a feedback signal to the PLC control panel. The PLC control panel then controls a relay to open the adjacent electric valve 6. At this time, the electric valve 6 corresponding to the clogged area closes, and a new filter area can then be replaced. The air intake process begins; and the second air intake area (i.e., the filter area corresponding to the second rectangular hole 3) begins automatic differential pressure detection. When the second area is also blocked, the next adjacent area can be replaced. The above process is repeated. When all the filters in the sub-areas are blocked (i.e., after the electric valve 6 corresponding to the last set of backup channels has completed the switching, the differential pressure is still detected), the PLC control panel controls the sound and light alarm to operate, thereby prompting relevant personnel to remove the filter 2 for cleaning or replacement. After the filter is cleaned and reinstalled, the air intake and circulation can be restarted (the circulation is fully disclosed in the announcement number CN221483822U, which proposes an air intake device for HVAC, and will not be described here).

[0037] The hardware connectivity architecture in this application is as follows:

[0038] 1. Differential pressure sensor wiring

[0039] Three-wire connection is used: power positive (24VDC), signal output (4-20mA), and power negative (common ground).

[0040] The high-pressure end is connected to the pressure tapping point of the air duct at the front end of the filter screen, and the low-pressure end is connected to the reference pressure measuring point of the air collector hood.

[0041] 2. Electric valve control circuit

[0042] The electric valve 6 drive module is controlled by a relay, and the relay coil is driven by the digital output terminal of the PLC control panel;

[0043] The valve position feedback signal is connected to the PLC analog input channel.

[0044] 3. Timer integration method

[0045] The PLC control panel has a built-in timer module for accumulating overpressure time.

[0046] 4. Alarm signal generation

[0047] Trigger the on-site audible and visual alarm (buzzer + red warning light).

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An air diversion device for heating, ventilation, and air conditioning, comprising a diversion hood, a mounting plate (1), a filter screen (2), an air collecting hood, a guide pipe, a partition, a diversion mechanism, a circulation assembly, a motor, gears, and a closing plate, characterized in that, It also includes a rectangular hole (3), an air inlet channel (4), an air inlet pipe (5), an electric valve (6), a common pipeline (7), and an exhaust pipe (8). Several rectangular holes (3) are equidistantly opened on the mounting plate (1) and connected to the filter screen (2); The air inlet channel (4), which is narrow at the top and wide at the bottom, corresponds one-to-one with the rectangular hole (3), and the bottom end of the air inlet channel (4) is consistent with the shape and size of the rectangular hole (3) and is welded and fixed. The top of the air inlet pipe (5) and the air inlet channel (4) are integrally formed, and each air inlet pipe (5) is equipped with an independently operating electric valve (6). The common pipeline (7) is connected to several air inlet pipes (5); The exhaust pipe (8) is connected to the public pipeline (7).

2. The air diversion device for HVAC according to claim 1, characterized in that, It also includes differential pressure sensors that correspond one-to-one with the air inlet channel (4) and are installed on the air inlet channel (4). The high-pressure end of the differential pressure sensor is connected to the air inlet pipe (5), and the low-pressure end of the differential pressure sensor is connected to the measuring point of the air collector hood.

3. The air diversion device for HVAC according to claim 2, characterized in that, The air collection hood is equipped with a reference pressure sensor as the low-pressure reference for all air inlet channels (4).

4. The air diversion device for HVAC according to claim 1, characterized in that, The electric valve (6) is an electric butterfly valve.

5. An air diversion device for HVAC according to claim 2, characterized in that, It also includes relays, timers and PLC control panel. The differential pressure sensor, timer, relay and electric valve (6) are all electrically connected to the PLC control panel.

6. An air diversion device for HVAC according to claim 5, characterized in that, An audible and visual alarm that is electrically connected to the PLC control panel is fixed on the mounting plate (1).

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