Purging device of medical fresh air fan unit

Abstract

The utility model relates to a blowing device of a medical fresh air fan unit, which comprises a fan unit, an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are arranged at two ends of the fan unit, a primary filter is arranged at an inlet of the air inlet pipe, and a first electric closed valve is arranged on a pipeline of the air inlet pipe. The blowing assembly comprises a blowing air pipe, a blowing fan, a second electric closed valve, a first check valve and a differential pressure gauge, the blowing air pipe is communicated with the air inlet pipe and an air outlet of the blowing fan at the same time, the second electric closed valve and the first check valve are arranged on a pipeline of the blowing air pipe, and the differential pressure gauge is arranged on the primary filter; the fresh air bypass assembly comprises a bypass air pipe, one end of the bypass air pipe communicates with the air inlet pipe, and a third electric closed valve and a second check valve are arranged on a pipeline of the bypass air pipe. The filter can be automatically cleaned, a fan unit does not need to be closed during cleaning, and the operation stability of an air conditioning system in an operating room is ensured.

Description

Technical Field

[0001] The utility model relates to a purge device, in particular to a purge device of a medical fresh air blower unit. Background Art

[0002] Currently, the air circulating within the hospital's operating room is centrally processed by a fresh air purification unit. After being processed by the fresh air unit, it provides sufficient, clean, and dry fresh air to the operating room's fresh air unit, thereby ensuring constant temperature, humidity, and humidity within the operating room. Therefore, the fresh air unit is a critical piece of equipment, but a common problem is that since the fresh air unit directly draws fresh air from outside, if it is not properly maintained, the primary filter is very likely to clog, resulting in a decrease in fresh air volume. This can then cause the fresh air unit's deep dehumidification fluorine system to freeze and issue low-pressure alarms, posing a significant risk to the normal operation of the operating room and significantly affecting the temperature and humidity within the operating room. Summary of the Invention

[0003] The purpose of the utility model is to provide a purge device for a medical fresh air fan unit that can automatically clean a filter without shutting down the purification unit during the cleaning process, thereby ensuring the operational stability of the operating room air-conditioning system.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a blowing device for a medical fresh air blower unit, comprising a blower unit, an air inlet pipe and an air outlet pipe, the fresh air inlet of the blower unit is connected to the air inlet pipe, and the air outlet is connected to the air outlet pipe, a primary filter is provided at the inlet of the air inlet pipe, and a first electric sealing valve is also provided on the air inlet pipe. The innovation lies in: it also includes a spray component and a fresh air bypass component,

[0005] The spray assembly includes a spray air duct, a purge fan, a second electric sealing valve, a first check valve and a pressure differential gauge. One end of the spray air duct is connected to the pipe body of the air inlet pipe, and the other end is connected to the air outlet of the purge fan. The second electric sealing valve and the first check valve are provided on the spray air duct. The pressure differential gauge is provided on the primary filter to detect the pressure difference before and after the primary filter enters the air filter.

[0006] The fresh air bypass assembly includes a bypass air duct, one end of which is connected to the body of the air inlet pipe, and a third electric sealing valve and a second check valve are provided on the bypass air duct.

[0007] The blowing air duct and the bypass air duct are located on both sides of the first electric sealing valve.

[0008] In the above technical solution, a first hinged air inlet component is provided at the air inlet of the purge blower.

[0009] In the above technical solution, a second hinged air outlet component is provided at the other end of the bypass air duct.

[0010] In the above technical solution, the fresh air inlet of the fan unit is softly connected to the air inlet pipe through a canvas hose, the air outlet is softly connected to the air outlet pipe through a canvas hose, and the air outlet pipe is externally connected to other circulation units.

[0011] In the above technical solution, a DDC controller is also included, and the frequency conversion mechanism, the first electric closed valve, the purge fan, the second electric closed valve, the first check valve, the third electric closed valve and the second check valve of the fan group are electrically connected to the corresponding connection ends of the DDC controller respectively.

[0012] In the above technical solution, fresh air louvers are further provided on the outer side of the primary filter.

[0013] In the above technical solution, one end of the injection air duct is sealed to the body of the air inlet pipe through a connecting flange and a seal, and one end of the bypass air duct is sealed to the body of the air inlet pipe through a connecting flange and a seal.

[0014] In the above technical solution, the primary filter is provided with a cleaning port for cleaning and blowing off particulate matter.

[0015] The positive effects of the present invention are: after adopting the purge device of the medical fresh air blower unit of the present invention, since the present invention also includes a spray component and a fresh air bypass component,

[0016] The spray assembly includes a spray air duct, a purge fan, a second electric sealing valve, a first check valve and a pressure differential gauge. One end of the spray air duct is connected to the pipe body of the air inlet pipe, and the other end is connected to the air outlet of the purge fan. The second electric sealing valve and the first check valve are provided on the spray air duct. The pressure differential gauge is provided on the primary filter to detect the pressure difference before and after the primary filter enters the air filter.

[0017] The fresh air bypass assembly includes a bypass air duct, one end of which is connected to the body of the air inlet pipe, and a third electric sealing valve and a second check valve are provided on the bypass air duct.

[0018] The blowing air duct and the bypass air duct are located on both sides of the first electric sealing valve.

[0019] When the fan unit is operating normally, the first electric sealing valve is in an open state, the spray component and the fresh air bypass component are both in a closed state, and fresh air is drawn from the outside, and is initially filtered by the primary filter and enters the fan unit through the air inlet pipe.

[0020] When the fan unit is running, the pressure differential gauge detects the pressure difference between the primary filter before and after the air enters. If the pressure difference is too large, an alarm command will be issued, and the purge working mode will be turned on, the first electric sealing valve will be closed, and the spray component and the fresh air bypass component will be turned on. Specifically,

[0021] Open the second electric sealing valve, the first check valve, the third electric sealing valve and the second check valve, and the fan unit temporarily draws fresh air from the bypass duct. At this time, turn on the purge fan, and the air blown by the purge fan will purge the primary filter through the spray duct. During the purge, there is no need to shut down the fan unit, so the normal operation of the indoor operating room is not affected.

[0022] Since the utility model adds a spray component and a fresh air bypass component, and switches the working mode of each component to realize automatic cleaning of the filter, it replaces the purely manual working mode of cleaning the primary filter in the existing technology. In addition, during the cleaning process, there is no need to shut down the fan unit, ensuring the stability of the operation of the operating room air-conditioning system. At the same time, it also greatly reduces the workload of maintenance personnel, who only need to clean up the large particles of dust and debris blown down regularly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of a specific embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the work flow of the present utility model. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and given embodiments, but the present invention is not limited thereto.

[0026] like Figure 1 As shown, a purge device for a medical fresh air blower unit includes a blower unit 1, an air inlet pipe 2 and an air outlet pipe 3. The fresh air inlet of the blower unit 1 is connected to the air inlet pipe 2, and the air outlet is connected to the air outlet pipe 3. A primary filter 5 is provided at the inlet of the air inlet pipe 2. At the same time, a first electric sealing valve 6 is also provided on the air inlet pipe 2. The device also includes a spray component 7 and a fresh air bypass component 8.

[0027] The spray assembly 7 includes a spray air duct 71, a purge fan 72, a second electric sealed valve 73, a first check valve 74 and a pressure differential gauge 75. One end of the spray air duct 71 is connected to the pipe body of the air inlet pipe 2, and the other end is connected to the air outlet of the purge fan 72. The second electric sealed valve 73 and the first check valve 74 are provided on the spray air duct 71. The pressure differential gauge 75 is provided on the primary filter 5 to detect the pressure difference before and after the primary filter 5 enters the air.

[0028] The fresh air bypass assembly 8 includes a bypass air duct 81, one end of which is connected to the body of the air inlet pipe 2, and a third electric sealing valve 82 and a second check valve 83 are provided on the bypass air duct 81.

[0029] The blowing air duct 71 and the bypass air duct 81 are located on both sides of the first electric sealing valve 6 .

[0030] like Figure 1 As shown, in order to prevent debris from entering the purge fan and bypass duct and affecting the reliability of use under working conditions, a first hinged tuyere member 76 is provided at the air inlet of the purge fan 72. A second hinged tuyere member 84 is provided at the other end of the bypass duct 81.

[0031] like Figure 1 As shown, in order to avoid the rigid connection between the air inlet and outlet ducts and the fan unit, and to prevent the fresh air from impacting the air duct and causing damage to the connection between the air duct and the fan unit, the fresh air inlet of the fan unit 1 is softly connected to the air inlet duct 2 through a canvas hose, and the air outlet is softly connected to the air outlet duct 3 through a canvas hose, and the air outlet duct 3 is externally connected to other circulation units.

[0032] like Figure 1 As shown, to facilitate overall automated control, the present invention further includes a DDC controller 9. The frequency conversion mechanism of the fan unit 1, the first electric sealing valve 6, the purge fan 72, the second electric sealing valve 73, the first check valve 74, the third electric sealing valve 82, and the second check valve 83 are electrically connected to corresponding connection terminals of the DDC controller 9. The DDC controller 9 primarily utilizes a PLC as its control core.

[0033] Furthermore, the main structure of the PLC controller includes a power supply, a central processing unit (CPU), a memory, an input / output (I / O) interface circuit, an expansion interface, a communication interface and a programmer.

[0034] Among them, the power supply is responsible for providing a stable power supply for the entire system. It uses a 220V AC power supply or a 24V DC power supply and provides the required DC power to each part through the internal switching power supply module.

[0035] The central processing unit (CPU) is the core part of the PLC, responsible for executing user programs, processing data, controlling I / O interface circuits, etc. It is connected to the memory, I / O interface circuits, etc. through the address bus, data bus, and control bus.

[0036] There are two types of memory: system memory and user memory. System memory is used to store the PLC system program, and user memory is used to store the control program and data written by the user.

[0037] The input / output (I / O) interface circuit receives signals from external sensors, buttons, and other devices and converts them into digital signals that the CPU can recognize. The output interface circuit converts the digital signals processed by the CPU into signals that can drive external actuators.

[0038] Expansion interfaces and communication interfaces allow the PLC to connect and communicate with other devices or systems to achieve a wider range of control and monitoring functions.

[0039] A programmer is a tool for programming and configuring programmable controllers, including handheld programmers and computers, which are used to input and modify control programs.

[0040] like Figure 1 As shown, in order to prevent debris from directly entering the filter during the process of drawing outdoor air, fresh air louvers 4 are further provided on the outer side of the primary filter 5.

[0041] like Figure 1 As shown, in order to achieve a quick sealed connection, one end of the blowing air duct 71 is sealed connected to the pipe body of the air inlet pipe 2 through a connecting flange and a seal, and one end of the bypass air duct 81 is sealed connected to the pipe body of the air inlet pipe 2 through a connecting flange and a seal.

[0042] Furthermore, in order to facilitate the timely cleaning of the blown-off particles, the primary filter 5 is provided with a cleaning port for cleaning the blown-off particles.

[0043] The utility model adds two air duct components on both sides of the air inlet pipe 2, namely the spray component 7 and the fresh air bypass component 8. The DDC controller 9 monitors the operation of the fan unit to determine whether it is time to clean or replace the filter, and performs different command actions according to the monitoring situation.

[0044] like Figure 2 As shown, the specific working process of the present invention is as follows: the DDC controller 9 sets two sets of thresholds, namely the maximum pressure difference setting value V that the filter needs to clean and the purge interval setting value T.

[0045] When the fan unit 1 is running, the pressure difference before and after the primary filter enters is detected by the pressure differential meter 75 and sent to the DDC controller 9. If the pressure difference is ≥ V, it means that the primary filter is seriously clogged and an alarm instruction is directly issued to remind the maintenance personnel to replace or clean the filter in time.

[0046] If the pressure difference is less than V, it means that the primary filter is blocked to varying degrees. Combined with the running time of the fan unit (each time the purge is completed, the running time will be cleared and reset), if the running time is less than T, it means that the time since the last purge is short and no purge is required. The fan unit continues to operate normally. Otherwise, the filter needs to be purged.

[0047] When the fan unit 1 is operating normally: the first electric sealing valve 6 is open, the spray assembly 7 and the fresh air bypass assembly 8 are both closed, fresh air is drawn from the outside, and is initially filtered by the primary filter 5 and enters the fan unit through the air inlet pipe.

[0048] Purge mode: close the first electric sealing valve 6, open the spray assembly 7 and the fresh air bypass assembly 8, specifically,

[0049] Open the second electric sealing valve 73, the first check valve 74, the third electric sealing valve 82 and the second check valve 83, and the fan unit 1 temporarily draws fresh air from the bypass air duct 81. At this time, turn on the purge fan 72, and the air blown out by the purge fan 72 will purge the primary filter 5 through the spray air duct 71 to restore its filtering function. During the purge, there is no need to shut down the fan unit, which will not affect the normal operation of the indoor operating room. After the purge work is completed, the fan unit returns to normal operation.

[0050] Since the utility model adds a spray component and a fresh air bypass component, and switches the working mode of each component to realize automatic cleaning of the filter, it replaces the purely manual working mode of cleaning the primary filter in the existing technology. In addition, during the cleaning process, there is no need to shut down the fan unit, ensuring the stability of the operation of the operating room air-conditioning system. At the same time, it also greatly reduces the workload of maintenance personnel, who only need to clean up the large particles of dust and debris blown down regularly.

[0051] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A purge device for a medical fresh air blower unit, comprising a blower unit (1), an air inlet pipe (2) and an air outlet pipe (3), wherein the fresh air inlet of the blower unit (1) is connected to the air inlet pipe (2), and the air outlet is connected to the air outlet pipe (3), a primary filter (5) is provided at the inlet of the air inlet pipe (2), and a first electric sealing valve (6) is also provided on the air inlet pipe (2), characterized in that: It also includes a spray assembly (7) and a fresh air bypass assembly (8), The spray assembly (7) comprises a spray air duct (71), a purge fan (72), a second electric sealing valve (73), a first check valve (74) and a pressure differential gauge (75). One end of the spray air duct (71) is connected to the pipe body of the air inlet pipe (2), and the other end is connected to the air outlet of the purge fan (72). The second electric sealing valve (73) and the first check valve (74) are provided on the pipe of the spray air duct (71). The pressure differential gauge (75) is provided on the primary filter (5) and is used to detect the pressure difference before and after the primary filter (5) enters the air. The fresh air bypass assembly (8) comprises a bypass air duct (81), one end of which is connected to the pipe body of the air inlet pipe (2), and a third electric sealing valve (82) and a second check valve (83) are provided on the bypass air duct (81). The blowing air duct (71) and the bypass air duct (81) are located on both sides of the first electric sealing valve (6).

2. The purge device of the medical fresh air blower unit according to claim 1 is characterized in that: A first hinged air inlet component (76) is provided at the air inlet of the purge fan (72).

3. The purge device of the medical fresh air blower unit according to claim 1 is characterized in that: A second hinged air outlet component (84) is provided at the other end of the bypass air duct (81).

4. The purge device of the medical fresh air blower unit according to claim 1, characterized in that: The fresh air inlet of the fan unit (1) is softly connected to the air inlet pipe (2) through a canvas hose, and the air outlet is softly connected to the air outlet pipe (3) through a canvas hose, and the air outlet pipe (3) is externally connected to other circulation units.

5. The purge device of the medical fresh air blower unit according to claim 1, characterized in that: The invention also includes a DDC controller (9), wherein the frequency conversion mechanism of the fan unit (1), the first electric sealing valve (6), the purge fan (72), the second electric sealing valve (73), the first check valve (74), the third electric sealing valve (82) and the second check valve (83) are respectively electrically connected to corresponding connection terminals of the DDC controller (9).

6. The purge device of the medical fresh air blower unit according to claim 1, characterized in that: Fresh air louvers (4) are also provided on the outer side of the primary filter (5).

7. The purge device of the medical fresh air blower unit according to claim 1, characterized in that: One end of the blowing air duct (71) is sealedly connected to the pipe body of the air inlet pipe (2) through a connecting flange and a sealing member, and one end of the bypass air duct (81) is sealedly connected to the pipe body of the air inlet pipe (2) through a connecting flange and a sealing member.

8. The purge device of the medical fresh air blower unit according to claim 1, characterized in that: The primary filter (5) is provided with a cleaning port for cleaning and blowing off particulate matter.

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