Four-channel clean air handling unit with hot standby constant air volume

Abstract

The utility model relates to the technical field of clean air conditioning units, in particular to a hot standby constant air volume four-channel clean air handling unit which comprises a shell, a plurality of fresh air openings are formed in the side wall of the shell, and an air outlet is formed in the side, away from the fresh air openings, of the shell; the processing unit comprises a fan set arranged on the inner wall of the shell and a filter set arranged on the inner wall of the shell, the fan set is located at the position, close to the fresh air opening, of the inner wall of the shell, and the filter set is located on the side, away from the fresh air opening, of the fan set; the temperature and humidity adjusting unit is used for controlling the temperature and humidity of air flowing through the processing unit; and the control unit is used for controlling the work of the processing unit and the temperature and humidity adjusting unit. The application has the effect that the starting mode of the standby fan is changed, so that the air volume attenuation time in the process of starting the standby fan is shortened.

Description

Technical Field

[0001] This application relates to the field of cleanroom air conditioning unit technology, and in particular to a four-channel clean air handling unit with hot standby constant air volume. Background Technology

[0002] Laboratory animal facilities, medical operating rooms, and other similar settings have extremely high requirements for air cleanliness, temperature and humidity, as well as airflow stability. Cleanroom air conditioning technology plays an important role in these settings.

[0003] Existing cleanroom air conditioning units typically use multiple fans operating in parallel. These fans are divided into working fans and standby fans. When the cleanroom air conditioning unit is working, the working fans supply air to the laboratory. When the working fans malfunction or need maintenance, staff activate the standby fans by cold starting. When the standby fans are working, staff shut down the working fans and perform maintenance or replacement work.

[0004] The aforementioned backup fan needs to be started via a cold start, and the airflow decay time is relatively long during the activation of the backup fan, which is an area for improvement. Utility Model Content

[0005] In order to change the start-up method of the standby fan and thus reduce the air volume decay time during the start-up process, this application provides a four-channel clean air handling unit with hot standby constant air volume.

[0006] This application provides a hot-standby constant-airflow four-channel clean air handling unit, which adopts the following technical solution:

[0007] A four-channel clean air handling unit with hot standby and constant air volume includes: a housing, with a plurality of fresh air inlets on the side wall of the housing and an air outlet on the side of the housing away from the fresh air inlets; a processing unit, including a fan unit disposed on the inner wall of the housing and a filter group disposed on the inner wall of the housing, the fan unit being located on the inner wall of the housing near the fresh air inlets and the filter group being located on the side of the fan unit away from the fresh air inlets; a temperature and humidity control unit for controlling the temperature and humidity of the air flowing through the processing unit; and a control unit for controlling the operation of the processing unit and the temperature and humidity control unit; the processing unit comprises a plurality of units, the fresh air inlets being disposed opposite to the processing units, the plurality of processing units being disposed side by side, and all of the plurality of processing units being connected to the temperature and humidity control unit.

[0008] By adopting the above technical solution, when the clean air conditioning unit is working, outside air enters the interior of the casing through the fresh air inlet. At this time, under the blowing action of the fan unit, the air passes through the filter group and enters the temperature and humidity control unit. Under the regulation of the temperature and humidity control unit, the air meets the laboratory requirements and enters the laboratory through the air outlet. During this process, several processing units are in the start-up state. When the standby fan needs to be activated, the processing unit is in the hot standby state. In this state, the air volume decay time during the start-up process of the processing unit is shorter. This setting changes the start-up method of the standby fan, thereby reducing the air volume decay time during the activation of the standby fan.

[0009] Optionally, the fan unit includes several fans, which are arranged in parallel.

[0010] By adopting the above technical solution, the fan unit is configured so that the fan unit continues to operate when one of the fans fails, and the other fans can increase or decrease their output power under the control of the control unit, thereby maintaining a constant air volume inside the processing unit and reducing the possibility of air volume fluctuations.

[0011] Optionally, the filter assembly includes a first filter installed on the inner wall of the housing and a second filter installed on the inner wall of the housing, wherein the second filter is located on the side of the first filter away from the fan.

[0012] By adopting the above technical solution, the setting of the first filter and the second filter realizes gradient filtration of air, thereby reducing the possibility of large dust particles in the air clogging subsequent devices. Moreover, the gradient filtration design improves the cleanliness of the air, so that the filtered air meets the laboratory standards.

[0013] Optionally, a differential pressure sensor is provided on the sidewall of both the first filter and the second filter, and the differential pressure sensor is electrically connected to the control unit.

[0014] By adopting the above technical solution, the differential pressure sensor enables staff to monitor the pressure difference between the first and second filters, thereby determining the clogging status of the first and second filters. Based on the signal fed back by the differential pressure sensor, staff can clean or replace the first and second filters in a timely manner, which improves the service life of the filter assembly.

[0015] Optionally, a number of isolation valves are installed on the outside of the housing, and the isolation valves are arranged opposite to the fresh air inlet. The isolation valves are used to prevent air crosstalk inside the processing units.

[0016] By adopting the above technical solution, the isolation valve reduces the possibility of air mixing between different processing units. When a processing unit fails, the isolation valve can reduce the possibility of the processing unit shutting down. At the same time, when staff maintain the processing unit, they can close the airflow in the processing unit through the isolation valve, thereby facilitating the maintenance work.

[0017] Optionally, a plurality of guide vanes are installed on the side wall of the housing, the guide vanes are located at the air outlet, and the angle of the guide vanes is adjustable.

[0018] By adopting the above technical solution, the design of the air guide plate makes the air at the air outlet more uniform, thereby making the air velocity at the air outlet uniform and further improving the cleanliness of the laboratory environment.

[0019] Optionally, the side wall of the housing is slidably connected with several sliding frames, and the fan unit, the filter group, the temperature and humidity control unit, and the control unit are respectively installed on the side wall of the sliding frames.

[0020] By adopting the above technical solution, the sliding frame makes the installation or maintenance of clean air conditioning units more efficient for staff. When staff need to maintain a component of the clean air conditioning unit, they control the corresponding sliding frame to slide out, and then perform maintenance operations on the component on the sliding frame. This setting simplifies the operation steps for staff and improves their work efficiency.

[0021] Optionally, a plurality of locking strips are fixed to the side wall of the housing, and a plurality of cards are rotatably connected to the side wall of the housing. The locking strips and the cards are arranged opposite to each other, and the cards are arranged opposite to the sliding frame. The side wall of the card can abut against the side wall of the locking strip, and the card is used to restrict the sliding of the sliding frame.

[0022] By adopting the above technical solution, when the staff uses the sliding frame, they can rotate the card strip to make the side wall of the card abut against the inner wall of the card. At this time, the relative position of the sliding frame is fixed. This setting reduces the possibility of the sliding frame slipping, thereby improving the stability of the clean air conditioning unit during operation.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. When the cleanroom air conditioning unit is working, outside air enters the interior of the fresh air inlet. Under the blowing action of the fan unit, the outside air enters the filter group. After being filtered by the filter group, the air enters the temperature and humidity control unit. Under the regulation of the temperature and humidity control unit, the air temperature and humidity reach the standard required for laboratory air. Subsequently, the air enters the laboratory through the air outlet. During this process, several processing units are in the start-up state. When a processing unit needs to work, the processing unit in hot standby state can start working directly. The air volume decay time during this process is short. This setting changes the start-up method of the standby fan, thereby reducing the air volume decay time during the activation of the standby fan.

[0025] 2. When staff install or repair the cleanroom air conditioning unit, they can remove the part to be repaired using the sliding bracket, and then perform repair work on the components on the sliding bracket. After the repair is completed, the staff can slide the sliding bracket into the inner wall of the casing. This design facilitates operation by staff, and the process is carried out outside the casing, reducing the impact on the operation of the cleanroom air conditioning unit inside the casing. Attached Figure Description

[0026] Figure 1 This is a system structure diagram of a four-channel clean air handling unit with hot standby constant air volume according to Embodiment 1 of this application.

[0027] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0028] Figure 3 This is a schematic diagram of the overall structure of a four-channel clean air handling unit with hot standby constant air volume according to Embodiment 2 of this application.

[0029] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0030] Reference numerals: 1. Housing; 2. Fresh air inlet; 3. Air outlet; 4. Processing unit; 41. Fan unit; 42. Filter group; 5. Temperature and humidity control unit; 6. Control unit; 411. Fan; 421. First filter; 422. Second filter; 7. Differential pressure sensor; 8. Isolation valve; 9. Guide vane; 10. Sliding frame; 11. Locking strip; 12. Card; 101. Outer shell; 102. Isolation plate. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0032] This application discloses a four-channel clean air handling unit with hot standby and constant air volume.

[0033] Example 1

[0034] Reference Figure 1 A four-channel clean air handling unit with hot standby and constant air volume includes a housing 1, several processing units 4, a temperature and humidity control unit 5, and a control unit 6. The housing 1 includes an outer shell 101 and four isolation plates 102. Several fresh air inlets 2 are opened on one side of the outer shell 101, and air outlets 3 are opened on the other side. The four isolation plates 102 are fixed to the inner wall of the outer shell 101 at intervals by welding. The processing units 4 are disposed on the inner wall of the outer shell 101. In this embodiment, four fresh air inlets 2 are preferably provided, and four processing units 4 are also preferred. Port 2 is positioned opposite to processing unit 4. Four processing units 4 are arranged adjacent to each other. Three isolation plates 102 are fixed between adjacent processing units 4. The three isolation plates 102 are arranged in a cross shape. An isolation plate 102 is fixed at the end of processing unit 4. One isolation plate 102 separates processing unit 4 from temperature and humidity control unit 5. Temperature and humidity control unit 5 is used to regulate the temperature and humidity of the air. Control unit 6 is used to control processing unit 4 and temperature and humidity control unit 5 respectively. Control unit 6 preferably uses a main control chip to collect 16 analog signals and output 12 PWM speed control signals.

[0035] Reference Figure 1 and Figure 2 The processing unit 4 includes a fan group 41 and a filter group 42. The fan group 41 includes several fans 411 fixed to the side wall of the isolation plate 102 by bolts. The filter group 42 includes a first filter 421 and a second filter 422 fixed to the side wall of the isolation plate 102 by bolts. In this embodiment, the fans 411 are preferably three EC external rotor fans 411. The three fans 411 are arranged in parallel and in an equilateral triangle. The first filter 421 preferably adopts a G4-level bag structure, and the second filter 422 preferably adopts an F7-level plate structure. The side walls of the first filter 421 and the second filter 422 are both provided with differential pressure sensors 7, and the differential pressure sensors 7 are electrically connected to the control unit 6.

[0036] Reference Figure 1 The temperature and humidity control unit 5 includes a surface cooler fixed to the inner wall of the outer casing 101 by bolts, an electric heater fixed to the inner wall of the outer casing 101 by bolts, and a humidifier fixed to the inner wall of the outer casing 101 by bolts. The surface cooler, electric heater, and humidifier are arranged sequentially from the fresh air inlet 2 to the air outlet 3. In this embodiment, the surface cooler preferably adopts a copper tube aluminum fin structure with a heat exchange area of ​​8㎡, the electric heater preferably has a power of 9kW and is controlled in three groups, and the humidifier preferably has a maximum humidification capacity of 6kg / h as an electrode humidifier.

[0037] Reference Figure 1 and Figure 2The side wall of the outer casing 101 is fixed with several isolation valves 8 by bolts, and a guide plate 9 is fixed on the side of the outer casing 101 away from the isolation valves 8. In this embodiment, four isolation valves 8 are preferred. The four isolation valves 8 are respectively set at the positions of four fresh air inlets 2. The isolation valves 8 are arranged opposite to the fresh air inlets 2. The guide plate 9 is located on the side wall of the outer casing 101 near the air outlet 3. The guide plate 9 is electrically connected to the control unit 6. The control unit 6 can control the angle of the guide plate 9.

[0038] According to Embodiment 1 of this application, the implementation principle of a four-channel clean air handling unit with hot standby constant air volume is as follows: When the clean air handling unit is working, the fan 411 draws air from the fresh air inlet 2. After the air is filtered by the first filter 421 and the second filter 422, the particulate content is reduced. Then, the control unit 6 controls the temperature and humidity adjustment unit 5 to adjust the temperature and humidity of the air. After the temperature and humidity of the air are adjusted, the air flows into the interior of the laboratory through the guide vane 9. During the operation of the clean air handling unit, the fans 411 in the four processing units 4 are all kept running. When the staff disassembles or maintains one of the processing units 4, the other three processing units 4 in hot standby state start working and adjust their power under the control of the control unit 6 to meet the air volume requirements. This setting changes the starting method of the standby fan 411, thereby reducing the air volume attenuation time during the activation of the standby fan 411.

[0039] Example 2

[0040] Example 2 differs from Example 1 in that: (Refer to...) Figure 3 and Figure 4 The outer side of the outer shell 101 is slidably connected with several sliding frames 10. The outer side of the sliding frame 10 can be smoothly connected to the outer shell 101. In this embodiment, there are preferably nine sliding frames 10. The nine sliding frames 10 correspond to four fan groups 41, four filter groups 42, and temperature and humidity control unit 5, respectively. When the staff disassembles or repairs the above components, the staff can slide out the above components through the sliding frame 10 and perform the corresponding work. Several clips 11 are fixed on the outer side of the outer shell 101. Cards 12 are rotatably connected to the side wall of the sliding frame 10. In this embodiment, there are preferably nine clips 11. The clips 11 and the cards 12 are arranged opposite to each other. The side wall of the card 12 can abut against the inner wall of the clip 11. When the side wall of the card 12 abuts against the inner wall of the clip 11, the sliding tendency of the sliding frame 10 stops.

[0041] According to Embodiment 2 of this application, the implementation principle of a four-channel clean air handling unit with hot standby constant air volume is as follows: When the staff disassembles or repairs the components of the clean air handling unit, the staff rotates the card 12 to move the card 12 away from the card strip 11, and then slides out of the sliding frame 10. At this time, the components of the clean air handling unit are easy for the staff to work on. After the disassembly or maintenance is completed, the staff slides into the sliding frame 10 and rotates the card 12 so that the side wall of the card 12 abuts against the inner wall of the card strip 11. This setting simplifies the disassembly and maintenance work of the clean air handling unit and improves the work efficiency of the staff.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A four-channel clean air handling unit with hot standby and constant air volume, characterized in that, include: The housing (1) has several fresh air inlets (2) on its side wall, and an air outlet (3) is provided on the side of the housing (1) away from the fresh air inlets (2); The processing unit (4) includes a fan unit (41) disposed on the inner wall of the housing (1) and a filter unit (42) disposed on the inner wall of the housing (1). The fan unit (41) is located on the inner wall of the housing (1) near the fresh air inlet (2), and the filter unit (42) is located on the side of the fan unit (41) away from the fresh air inlet (2). Temperature and humidity control unit (5), the temperature and humidity control unit (5) is used to control the temperature and humidity of the air flowing through the processing unit (4); Control unit (6), the control unit (6) is used to control the operation of the processing unit (4) and the temperature and humidity regulating unit (5); The processing unit (4) is provided in several ways. The fresh air inlet (2) is arranged opposite to the processing unit (4). The processing units (4) are arranged side by side, and all of the processing units (4) are connected to the temperature and humidity control unit (5).

2. The four-channel clean air handling unit with hot standby constant air volume according to claim 1, characterized in that: The fan unit (41) includes several fans (411), which are arranged in parallel.

3. A four-channel clean air handling unit with hot standby constant air volume according to claim 2, characterized in that: The filter assembly (42) includes a first filter (421) installed on the inner wall of the housing (1) and a second filter (422) installed on the inner wall of the housing (1), wherein the second filter (422) is located on the side of the first filter (421) away from the fan (411).

4. A four-channel clean air handling unit with hot standby constant air volume according to claim 3, characterized in that: Differential pressure sensors (7) are provided on the sidewalls of both the first filter (421) and the second filter (422), and the differential pressure sensors (7) are electrically connected to the control unit (6).

5. A four-channel clean air handling unit with hot standby constant air volume according to claim 4, characterized in that: A number of isolation valves (8) are installed on the outside of the housing (1). The isolation valves (8) are arranged opposite to the fresh air inlet (2). The isolation valves (8) are used to prevent air crosstalk inside the processing units (4).

6. A four-channel clean air handling unit with hot standby constant air volume according to claim 5, characterized in that: The side wall of the housing (1) is equipped with several guide vanes (9), which are located at the air outlet (3) and the angle of the guide vanes (9) is adjustable.

7. A four-channel clean air handling unit with hot standby constant air volume according to claim 1, characterized in that: The side wall of the housing (1) is slidably connected to several sliding frames (10), and the fan unit (41), the filter group (42), the temperature and humidity regulating unit (5), and the control unit (6) are respectively installed on the side wall of the sliding frame (10).

8. A four-channel clean air handling unit with hot standby constant air volume according to claim 7, characterized in that: The side wall of the housing (1) is fixed with several clips (11), and the side wall of the housing (1) is rotatably connected with several cards (12). The clips (11) and the cards (12) are arranged opposite to each other, and the cards (12) are arranged opposite to the sliding frame (10). The side wall of the card (12) can abut against the side wall of the clips (11). The card (12) is used to restrict the sliding of the sliding frame (10).

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