Digital brushless DC air handling unit with medium-efficiency low-resistance filtration

Abstract

The utility model discloses a digital brushless DC air handling unit with medium -efficiency low -resistance filtration, its characterized in that, including the box, the box is divided into two chambers by the partition, is first, second chamber respectively, be equipped with filter and heat exchanger in the first chamber, be equipped with fan in the second chamber, and the fan includes the DC motor, the box wall of first chamber is opened and has the air inlet, and the box wall of second chamber is opened and has the air outlet, the partition is opened and has the through -hole, the air inlet of fan is connected with the through -hole, and filter and heat exchanger are arranged between the air inlet on the box wall and the partition in proper order, and filter includes medium -efficiency filter, and the filtering accuracy of medium -efficiency filter is between 0.1 5um. The utility model has the characteristics such as high energy -conserving, high efficiency, long life, little vibration, low noise and can continuous uninterrupted work.

Description

Technical Field

[0001] This utility model relates to an air handling unit, and more particularly to a digital brushless DC air handling unit with a medium-efficiency, low-resistance filter. Background Technology

[0002] Currently, for some microelectronics factories with certain purification requirements, air conditioning units are needed to both heat and cool the air, while simultaneously ensuring a certain level of air cleanliness. For large spaces like factories, air handling units with medium-efficiency filters are typically used. However, these units only provide heating and cooling; achieving a specific level of cleanliness requires adding a separate air handling unit for purification, resulting in a complex and expensive system. This patented unit integrates a medium-efficiency filter into the air handling unit and is equipped with a centrifugal fan featuring a digital brushless DC external rotor motor. This allows for both heating and cooling of air in large spaces like factories, while maintaining air cleanliness, and is also more intelligent, energy-efficient, and highly effective. Utility Model Content

[0003] This utility model provides a digital brushless DC air handling unit with medium-efficiency low-resistance filter to solve the technical problems existing in the prior art.

[0004] The technical solution adopted by this utility model to solve the technical problems existing in the prior art is as follows:

[0005] A digital brushless DC air handling unit with medium-efficiency, low-resistance filtration includes a housing, which is divided into two chambers by a partition, namely a first chamber and a second chamber. The first chamber houses a filter and a heat exchanger; the second chamber houses a fan, which includes a DC motor. An air inlet is located on the wall of the first chamber, and an air outlet is located on the wall of the second chamber. Through holes are formed in the partition; the fan's air inlet is connected to the through holes. The filter and heat exchanger are sequentially arranged between the air inlet and the partition on the housing wall. The filter includes a medium-efficiency filter with a filtration accuracy between 0.1 and 5 μm.

[0006] Furthermore, the medium-efficiency filter includes a bag filter, and a bracket for installing the bag filter is provided in the first chamber; the frame of the bracket is sealed and fixed to the inner wall of the first chamber, and multiple ports for fixing the opening end of the bag filter are arranged in parallel on the bracket.

[0007] Furthermore, it also includes a controller, which has an operation panel with a numeric keypad. The operator sets the input current of the DC motor through the numeric keypad, and the controller outputs a signal to control the input current of the DC motor.

[0008] Furthermore, it also includes a detection device and an alarm device. The detection device includes a first temperature sensor for detecting the motor temperature, a second temperature sensor for detecting the temperature inside the second chamber, and a current sensor for detecting the motor current. The alarm device includes an alarm. The detection signal of the detection device is input to a controller, which has multiple comparators. Each comparator has two input terminals: one input terminal receives the detection signal, and the other input terminal receives the corresponding set threshold. When the detection signal is greater than or less than the corresponding set threshold, the comparator outputs a signal to the alarm, causing the alarm to issue an alarm signal.

[0009] Furthermore, the enclosure is equipped with multiple access doors, which are located on the front, rear, left, right, or top sides.

[0010] Furthermore, the heat exchanger includes a cooling coil; a heat medium, a cold medium, or a refrigerant flows through the inner cavity of the cooling coil.

[0011] Furthermore, the heat exchanger also includes an electrically heated coil.

[0012] Furthermore, a condensate tray is provided below the surface cooling coil to collect the condensate generated on the surface of the surface cooling coil.

[0013] Furthermore, the box body is formed by a frame and sealed box panels; the box panels are made of sandwich color steel plates, which include two layers of color steel plates, inner and outer, and an intermediate insulation filling layer; the color steel plates are galvanized plates, cold-rolled plates, stainless steel plates, or aluminum-magnesium-manganese plates; the materials of the intermediate insulation filling layer include polyurethane, rock wool, and glass wool; the bottom of the box body is provided with insertion holes or slots for fork insertion.

[0014] Furthermore, an air inlet valve for manually adjusting the air volume is provided at the air inlet on the housing wall, and an air outlet valve for manually adjusting the air volume is provided at the air outlet on the housing wall.

[0015] The advantages and positive effects of this invention are: the fan is driven by a DC motor, resulting in low vibration and low noise. Return air is filtered by a bag-type medium-efficiency filter to remove small dust particles; in summer, cold water flows through the cooling coils, and the filtered air is cooled and dehumidified before being delivered; in winter, hot water flows through the cooling coils, and the filtered air is heated before being delivered; compared to ordinary medium-efficiency filters, the bag-type medium-efficiency filter reduces the internal resistance of the unit and lowers energy consumption. This invention features high energy saving, high efficiency, long lifespan, low vibration, low noise, and continuous uninterrupted operation. Attached Figure Description

[0016] Figure 1 This is a front view of the front panel of a digital brushless DC air handling unit with medium-efficiency low-resistance filter of this utility model when it is not installed.

[0017] Figure 2 This is a top view of the upper side panel of a digital brushless DC air handling unit with medium-efficiency low-resistance filter of this utility model when it is not installed.

[0018] In the diagram: 1. Air inlet valve; 2. Medium-efficiency filter; 3. Cooling coil; 3-1. Cooling coil inlet and outlet water pipes; 4. Baffle plate; 5. Fan; 6. Housing; 7. Air supply valve; 8. Housing base; 9. Water collection tray. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] In the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; or an electrical connection or signal transmission. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0021] Please see Figures 1 to 2 A digital brushless DC air handling unit with medium-efficiency, low-resistance filtration includes a housing 6, which is divided into two chambers by a partition 4, namely a first chamber and a second chamber. The first chamber is equipped with a filter and a heat exchanger. The second chamber is equipped with a fan 5, which includes a DC motor. An air inlet is opened on the wall of the housing 6 in the first chamber, and an air outlet is opened on the wall of the housing 6 in the second chamber. A through hole is opened on the partition 4. The air inlet of the fan 5 is connected to the through hole. The filter and the heat exchanger are sequentially arranged between the air inlet on the wall of the housing 6 and the partition 4. The filter includes a medium-efficiency filter 2. The filtration accuracy of the medium-efficiency filter 2 is between 0.1-5μm.

[0022] Preferably, the medium-efficiency filter 2 may include a bag filter, and the first chamber may also be provided with a bracket for installing the bag filter; the bracket frame is sealed and fixed to the inner wall of the first chamber, and the bracket may be provided with multiple ports in parallel for fixing the opening end of the bag filter.

[0023] Preferably, the system may further include a controller, which may have an operation panel and a numeric keypad. The operator can set the input current of the DC motor via the numeric keypad, and the controller outputs signals to control the input current of the DC motor. The controller may include a DC motor controller and a text display as in the prior art; the text display includes a numeric keypad and a display screen.

[0024] Preferably, it may further include a detection device and an alarm device. The detection device may include a first temperature sensor for detecting the motor temperature, a second temperature sensor for detecting the temperature inside the second chamber, and a current sensor for detecting the motor current. The alarm device includes an alarm. The detection signal of the detection device is input to a controller, which may have multiple comparators. Each comparator includes two input terminals: one input terminal receives the detection signal, and the other input terminal receives a corresponding set threshold. When the detection signal is greater than or less than the corresponding set threshold, the comparator outputs a signal to the alarm, causing the alarm to issue an alarm signal.

[0025] Preferably, the housing 6 may be provided with multiple inspection doors, which may be located on the front side, rear side, left side, right side or top side.

[0026] Preferably, the heat exchanger may include a cooling coil 3; a heat medium, a cold medium, or a refrigerant flows through the inner cavity of the cooling coil 3.

[0027] Preferably, the heat exchanger may also include an electrically heated coil.

[0028] Preferably, a water collection tray 9 for collecting condensate generated on the surface of the cooling coil 3 may be provided below the cooling coil 3.

[0029] Preferably, the box body 6 can be formed by a frame and a sealed box panel; the box panel can be made of sandwich color steel plate, which can include two layers of color steel plate and an inner and outer layer of insulation filling layer; the color steel plate can be galvanized plate, cold-rolled plate, stainless steel plate or aluminum-magnesium-manganese plate; the material of the middle insulation filling layer can include polyurethane, rock wool or glass wool; the bottom of the box body 6 can be provided with holes or slots for fork insertion.

[0030] Preferably, an air inlet valve 1 for manually adjusting the air volume can be provided at the air inlet on the wall of the housing 6, and an air outlet valve for manually adjusting the air volume can be provided at the air outlet on the wall of the housing 6.

[0031] The structure and working principle of this utility model are further illustrated below with a preferred embodiment:

[0032] A digital brushless DC air handling unit with medium-efficiency, low-resistance filtration includes a housing 6, a controller, a detection device, and an alarm device. The housing 6 is divided into two chambers by a partition 4, namely the first chamber and the second chamber. The first chamber contains a filter and a heat exchanger. The second chamber contains a fan 5, which includes a DC motor. An air inlet is opened on the wall of the housing 6 in the first chamber, and an air outlet is opened on the wall of the housing 6 in the second chamber. A through hole is opened on the partition 4. The air inlet of the fan 5 is connected to the through hole. The filter and the heat exchanger are sequentially arranged between the air inlet on the wall of the housing 6 and the partition 4. The filter includes a low-resistance medium-efficiency filter 2 and a high-efficiency single-piece filter. The filtration accuracy of the medium-efficiency filter 2 is between 1-10μm. The initial resistance of the medium-efficiency filter 2 is about 30-60Pa, and the final resistance is about 70-120Pa. The high-efficiency single-piece filter has a filtration accuracy between 0.1-1μm; the initial resistance of the high-efficiency single-piece filter is about 50-90Pa, and the final resistance is about 100-180Pa. Fan 5 is a digital brushless DC external rotor centrifugal fan. This centrifugal fan with a digital brushless DC external rotor motor uses a maintenance-free brushless DC motor with a built-in intelligent control module, and comes with an RS485 output interface, a 0-10V sensor output interface, a 4-20mA speed control switch output interface, an alarm device output interface, and a master-slave signal output interface.

[0033] The medium-efficiency filter 2 includes a bag filter, and a bracket for mounting the bag filter is also provided in the first chamber. The frame of the bracket is sealed and fixed to the inner wall of the first chamber, and multiple ports for fixing the opening end of the bag filter are arranged side by side on the bracket. The bracket is constructed of a galvanized mounting frame and a galvanized support plate. The support plate is provided with ports for mounting the filter bag, such as bayonets, flanges, etc., to engage the opening end of the bag filter with the bayonet or to the flange threaded connection.

[0034] The single-piece filter is made of PP material with a galvanized frame.

[0035] The controller is equipped with an operation panel with a numeric keypad. The operator sets the input current of the DC motor through the numeric keypad, and the controller outputs a signal to control the input current of the DC motor.

[0036] The detection device includes a first temperature sensor for detecting the motor temperature, a second temperature sensor for detecting the temperature inside the second chamber, and a current sensor for detecting the motor current; the alarm device includes an alarm; the detection signal input controller of the detection device is equipped with multiple comparators, each comparator having two input terminals, one for inputting the detection signal and the other for inputting the corresponding set threshold; when the detection signal is greater than or less than the corresponding set threshold, the comparator outputs a signal to the alarm, causing the alarm to issue an alarm signal.

[0037] The housing 6 has multiple access doors located on the front and rear sides. Each access door has double-sided handles and is seamlessly integrated with the housing 6 using single-sided screws. Removing the access doors allows for easy access to the fan 5 and filter.

[0038] The heat exchanger includes a cooling coil 3; a heat transfer medium, refrigerant, or cooling medium flows through the inner cavity of the cooling coil 3. A water collection tray 9 is located below the cooling coil 3 to collect condensate generated on its surface. The cooling coil 3 is a copper tube with aluminum foil; different circuit structures and the number of fins are selected according to the required cooling and heating capacity. The inlet and outlet water pipes 3-1 of the cooling coil can be installed on the rear panel. When cold or hot water is supplied, the cooling coil 3 can cool and dehumidify or heat the air. In summer, the condensate from cooling and dehumidification falls directly into the galvanized water collection tray 9 and flows out of the unit through the drain outlet on the side of the tray 9.

[0039] The enclosure 6 is composed of a frame and sealed panels. The panels are made of sandwich color steel sheets, consisting of inner and outer layers of color steel sheets and an intermediate insulation layer. The panels are made of galvanized steel sheets and white color steel sheets as the outer surface, and are integrally foamed with polyurethane filling material, which has the advantages of high strength, no deformation, good anti-cold bridging effect, and low air leakage rate. The bottom of the enclosure 6 is provided with insertion holes or slots for forklifts. A enclosure base 8 can be installed, and the enclosure can be mounted on the enclosure base 8. The enclosure base 8 is made of galvanized material and is fixed to the bottom of the enclosure with bolts. It has forklift slots cut out on the top for easy forklift handling.

[0040] An air inlet valve 1 for manually adjusting the air volume is provided at the air inlet on the wall of the enclosure, and an air outlet valve 7 for manually adjusting the air volume is provided at the air outlet on the wall of the enclosure.

[0041] When the unit is operating, the digital brushless DC external rotor centrifugal fan is started. In summer, the coil water valve is activated to introduce chilled water. The return air passes through the inlet valve 1, then through the medium-efficiency filter 2 to remove smaller dust particles. After being cooled and dehumidified by the coil, the air reaches the required room temperature, humidity, and cleanliness. Finally, the air is delivered by the centrifugal fan. In winter, the coil serves to raise the temperature and lower the relative humidity. The digital brushless DC external rotor centrifugal fan adjusts the airflow through the controller to meet the required room air exchange rate. The treated air passes through the bag filter 2 and the coil, and is then delivered by the fan to the air supply valve 7. The casing provides sealing and insulation for the unit.

[0042] The medium-efficiency filter 2 uses a bag filter, which has high filtration efficiency and low resistance, meeting the air cleanliness and energy-saving requirements of factories with certain purification needs. It is also equipped with a digital brushless DC external rotor centrifugal fan to meet the air supply needs of large spaces. This unit is widely used in factories with purification requirements, greatly helping to save on initial investment and reduce subsequent maintenance costs and energy consumption.

[0043] The aforementioned controller, DC motor controller, text display, comparator, detection device, first temperature sensor, second temperature sensor, current sensor, alarm, digital brushless DC external rotor centrifugal fan, bag filter, bracket for installing bag filter, single-piece filter, housing, heat exchanger, surface cooling coil and other components, structures and devices can all use applicable components, structures and devices in the existing technology, and be connected and installed using conventional technical means.

[0044] The above embodiments are only used to illustrate the technical ideas and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The patent scope of this utility model cannot be limited by these embodiments alone. That is, any equivalent changes or modifications made to the spirit disclosed in this utility model still fall within the patent scope of this utility model.

Claims

1. A digital brushless DC air handling unit with medium-efficiency, low-resistance filter, characterized in that, The device includes a housing, which is divided into two chambers by a partition, namely the first chamber and the second chamber. The first chamber contains a filter and a heat exchanger. The second chamber contains a fan, which includes a DC motor. The first chamber has an air inlet on its housing wall, and the second chamber has an air outlet on its housing wall. The partition has through holes. The air inlet of the fan is connected to the through holes. The filter and the heat exchanger are arranged sequentially between the air inlet on the housing wall and the partition. The filter includes a medium-efficiency filter with a filtration accuracy between 0.1 and 5 μm.

2. The digital brushless DC air handling unit with medium-efficiency low-resistance filter according to claim 1, characterized in that, The medium-efficiency filter includes a bag filter, and a bracket for installing the bag filter is provided in the first chamber; the frame of the bracket is sealed and fixed to the inner wall of the first chamber, and multiple ports for fixing the opening end of the bag filter are arranged in parallel on the bracket.

3. The digital brushless DC air handling unit with medium-efficiency low-resistance filter according to claim 1, characterized in that, It also includes a controller, which has an operation panel with a numeric keypad. The operator sets the input current of the DC motor through the numeric keypad, and the controller outputs a signal to control the input current of the DC motor.

4. The digital brushless DC air handling unit with medium-efficiency low-resistance filter according to claim 3, characterized in that, It also includes a detection device and an alarm device. The detection device includes a first temperature sensor for detecting the motor temperature, a second temperature sensor for detecting the temperature inside the second chamber, and a current sensor for detecting the motor current. The alarm device includes an alarm. The detection signal of the detection device is input to a controller, which has multiple comparators. Each comparator has two input terminals: one input terminal receives the detection signal, and the other input terminal receives the corresponding set threshold. When the detection signal is greater than or less than the corresponding set threshold, the comparator outputs a signal to the alarm, causing the alarm to issue an alarm signal.

5. The digital brushless DC air handling unit with medium-efficiency low-resistance filter according to claim 1, characterized in that, The enclosure is equipped with multiple access doors, which are located on the front, rear, left, right, or top sides.

6. The digital brushless DC air handling unit with medium-efficiency low-resistance filter according to claim 1, characterized in that, The heat exchanger includes a cooling coil; a heat transfer medium, refrigerant, or cooling medium flows through the inner cavity of the cooling coil.

7. The digital brushless DC air handling unit with medium-efficiency low-resistance filter according to claim 6, characterized in that, The heat exchanger also includes an electrically heated coil.

8. The digital brushless DC air handling unit with medium-efficiency low-resistance filter according to claim 6, characterized in that, A condensate tray is installed below the surface cooling coil to collect the condensate generated on its surface.

9. The digital brushless DC air handling unit with medium-efficiency low-resistance filter according to claim 1, characterized in that, The box body is formed by a frame and sealed panels; the panels are made of sandwich color steel plates, which include two layers of color steel plates, inner and outer, and an intermediate insulation filling layer; the color steel plates are galvanized plates, cold-rolled plates, stainless steel plates, or aluminum-magnesium-manganese plates; the materials of the intermediate insulation filling layer include polyurethane, rock wool, and glass wool; the bottom of the box body is provided with holes or slots for fork insertion.

10. The digital brushless DC air handling unit with medium-efficiency low-resistance filter according to claim 1, characterized in that, The air inlet on the wall of the enclosure is equipped with an air inlet valve for manually adjusting the air volume, and the air outlet on the wall of the enclosure is equipped with an air outlet valve for manually adjusting the air volume.

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