Fan device, air conditioning system

Abstract

The present invention discloses a fan device and an air conditioning system. The fan device comprises: a closed air duct, an air inlet arranged at one end of the closed air duct, a plurality of air outlets arranged at the other end of the closed air duct, a fan and a one-way air flow valve arranged at the air outlets; when there is a fan failure, the one-way air flow valve corresponding to the fan is closed because the pressure on its air outlet side is less than the pressure on its air inlet side. The present invention can reduce the impact of a fan failure on the total air volume to a minimum.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a fan device and an air conditioning system using the fan device. Background Art

[0002] In existing air-conditioning systems, in order to reduce production costs and facilitate control, multiple fans are usually used to form a fan wall to replace a high-power fan. When multiple fans are operating normally, the pressure on the air inlet side is greater than the pressure on the air outlet side, and the wind direction in the duct is in one direction. When one of the multiple fans fails, the pressure on the air outlet side of the failed fan will be greater than the pressure on its air inlet side, causing a small backflow in the duct. Therefore, when a fan failure occurs in a fan device with multiple fans, in addition to the air supply lost by the failed fan, the backflow phenomenon will further lose air supply, which has a more serious impact.

[0003] In addition, multiple fans are installed inside the pipeline. The installation layout of multiple fans is complex, often presented in the form of a fan wall structure. Since some fans are located at a high position and are difficult to disassemble, it not only increases the difficulty of maintenance, but also increases the maintenance time. Each maintenance requires shutdown, which greatly affects actual usage needs. Summary of the invention

[0004] In order to solve the technical problem in the prior art that a fan device with multiple fans suffers from a large loss of air supply volume when a fan fails, the present invention provides a fan device and an air conditioning system.

[0005] The fan device proposed in the present invention includes: a closed air duct, an air inlet arranged at one end of the closed air duct, a plurality of air outlets arranged at the other end of the closed air duct, a fan and a one-way airflow valve arranged at the air outlets; when there is a fan failure, the one-way airflow valve corresponding to the fan is closed because the pressure on its outlet side is less than the pressure on its inlet side.

[0006] Furthermore, it also includes an inspection port arranged on the outside of the closed air duct and connected to the closed air duct, a guide rail connecting each air outlet and the inspection port for installing the fan, and a driving module that can drive any fan to move along the guide rail to the inspection port or any air outlet.

[0007] Furthermore, the closed air duct and the inspection port are connected to or blocked by a movable baffle.

[0008] Furthermore, it also includes a baffle driving module for driving the baffle to move.

[0009] Furthermore, it also includes a control module. When it is determined that a fan fails, the control module controls the speed of all fans to decrease, and at the same time controls the baffle drive module to open the inspection port, and controls the drive module to move the failed fan to the inspection port. After the failed fan reaches the inspection port, the baffle drive module is controlled to close the inspection port, and at the same time, the speed of each fan is controlled according to the preset value and the air outlet parameters of the current closed air duct.

[0010] Furthermore, the air outlet parameters of the closed air duct are detected by a detection sensor.

[0011] Furthermore, the air outlet parameter is air volume or wind speed.

[0012] Furthermore, it also includes a position sensor for detecting whether the position of the fan and the air outlet are aligned. When the fan needs to increase its speed after being moved, the control module increases the speed of the fan when it determines that the signal of the position sensor is an alignment signal.

[0013] Furthermore, the position sensor is an infrared sensor.

[0014] Furthermore, the fan is an EC fan.

[0015] The air conditioning system proposed by the present invention adopts the fan device described in the above technical solution.

[0016] Furthermore, the air-conditioning system is a combined air-conditioning system.

[0017] The present invention provides a one-way airflow valve to minimize the air volume loss of the unit when there is a fan failure. At the same time, the present invention provides guide rails, drive modules, inspection ports, etc., which not only solves the problems of fixed layout position of large unit fans, difficult maintenance of high-position fans, long maintenance time and high cost, but also controls these components through the control module to form a good coordination relationship, so that when the fan fails, it can be maintained without stopping the machine, and maintenance personnel do not need to enter the interior of the unit, but can perform actual maintenance needs at the corresponding position outside the unit, thereby ensuring the convenience of actual use by users, saving maintenance costs and time, and reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is described in detail below with reference to the embodiments and accompanying drawings, wherein:

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0020] Figure 2 It is an operation flow chart of an embodiment of the present invention.

[0021] Explanation of the accompanying drawings: 1. Fan; 2. Inspection port; 3. Guide rail; 4. Drive module; 5. Position sensor; 6. Baffle; 7. Baffle drive module. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0024] like Figure 1 As shown, the fan device of the present invention includes a plurality of fans 1, and the fans can be EC fans or other types of fans. The plurality of fans 1 are installed in a closed air duct, one end of which is an air inlet, and the other end is provided with a plurality of air outlets, and each fan 1 is installed in each air outlet respectively, and a one-way air flow valve is also installed at the air outlet. When a certain fan fails, the pressure on the outlet side of the one-way air flow valve corresponding to the fan will be lower than the pressure on the inlet side, so that the one-way air flow valve will be automatically closed, reducing the impact of the air supply loss caused by the fan failure.

[0025] In a further embodiment, a maintenance port 2 is provided on one side of the closed air duct, and a guide rail 3 is connected between each air outlet and the maintenance port, and each fan 1 is installed on the guide rail 3. The fan can be driven to move along the guide rail through the drive module 4 to adjust the position of the fan. The present invention does not limit the specific arrangement of the guide rail, as long as the fan 1 can be moved along the guide rail to the maintenance port 2 to facilitate the maintenance of the faulty fan. In the first embodiment, each air outlet is connected to the maintenance port 2 respectively with a guide rail, so that the drive module 4 can drive the fan 1 to move to the maintenance port 2. In the second embodiment, an annular guide rail is set between each air outlet, and then the annular guide rail is connected to the maintenance port 2 through a strip guide rail, so that the fan can be moved along the guide rail to each air outlet, and the position of each fan 1 and the air outlet is not relatively fixed and can be adjusted. At the same time, during the movement, the fan closest to the maintenance port can also be moved to the maintenance port 2. In the third embodiment, a plurality of horizontal guide rails and a plurality of vertical guide rails may form a grid-like guide rail network, each intersection of which corresponds to the position of an air outlet, and then a strip guide rail is connected to the inspection port 2 through the guide rail network. This guide rail can also enable the fan to be moved to any air outlet and to the position of the inspection port. Figure 1 The setting of the guide rails shown is a specific implementation form of the third embodiment. There are two groups of mutually parallel horizontal guide rails and two groups of mutually parallel vertical guide rails in the figure. Each group of horizontal guide rails or vertical guide rails is provided with two guide rails, and the horizontal guide rails and the vertical guide rails are perpendicular to each other. The length of the horizontal guide rail located at the bottom is longer than the length of the horizontal guide rail located at the top, and extends directly to the inspection port. Each fan is driven by four drive modules 4 around it to run along the guide rails. The guide rails and the drive module 4 are spliced ​​with the fan module, so that each single fan can be adjusted in position inside the unit. The EC fan installed at a higher position can automatically run to a lower position, and then through the inspection port set outside the unit, the fan with internal fault can reach the outside of the unit through the low-position inspection port, ensuring that the maintenance personnel can take out the fan for maintenance outside the machine without stopping the machine for maintenance.

[0026] When there is no faulty fan that needs to be repaired, a movable baffle 6 is set between the closed air duct and the inspection port to block each other to prevent the internal air volume from leaking to the outside. When a faulty fan needs to be repaired, the movable baffle 6 is opened to connect the closed air duct and the inspection port.

[0027] In a further embodiment, the movement of the baffle 6 is driven by a baffle driving module 7 .

[0028] In a further embodiment, the coordination between all components can be controlled by a control module. The control module can determine whether the fan is faulty. When the fan is an EC fan, the control module can determine whether the EC fan is faulty by monitoring its speed signal. When the speed does not match the target speed of the fan, it can be determined that the EC fan is faulty. Another way to detect a fault is that the control module can monitor the switch state of the one-way airflow valve. If the one-way airflow valve is suddenly closed, it can be determined that the fan corresponding to the one-way airflow valve is faulty. Another way to detect a fault is that when it is detected that the air outlet speed of the closed air duct is attenuated, the control module can also determine that a fan has failed, and then determine which fan is faulty based on various operating data of the fan. When the control module determines that a fan fails, the speed of all fans is controlled to decrease, and the baffle drive module is controlled to move the baffle to open the inspection port, and the drive module is controlled to drive the failed fan to move to the inspection port. After the failed fan reaches the inspection port, the baffle drive module is controlled to move the baffle to close the inspection port, and the speed of each fan is controlled according to the preset value and the current air outlet parameters of the closed air duct. For example, since one fan has been reduced, the total air volume is insufficient at this time, and the speed of the remaining fans can be increased to keep the total air volume unchanged. Specifically, the air outlet parameters of the closed air duct can be detected by a detection sensor. The air outlet parameters can be air volume or wind speed. The corresponding detection sensor can be a wind speed sensor, or an air volume sensor, etc.

[0029] In a preferred embodiment, the fan device further includes a position sensor 5, which is used to detect whether the position of the fan and the air outlet is aligned. The position sensor can be specifically an infrared sensor, etc. In a specific embodiment, the infrared sensor is preset at the top of the one-way airflow valve to ensure that the EC fan can be accurately positioned when it is running inside, and to prevent the loss of air volume caused by positioning deviation. The one-way airflow valve is preset at the operating position of the EC fan module, and the EC fan module and the drive module are combined into a movable component to ensure that the EC fan can move inside the unit. For example, the transmitting end of the infrared sensor is installed at the air outlet. If the air outlet is called the front side of the fan, the receiving end of the infrared sensor is set at the rear side (i.e., the air inlet end) of the fan. When the signals of the transmitting end and the receiving end are interrupted, it is judged that the position of the fan and the air outlet are aligned. For another example, the transmitting end of the infrared sensor can be installed at the air outlet, and the receiving end of the infrared sensor can be installed on the fan. When the fan moves to the correct position, the receiving end of the infrared sensor receives the signal of the transmitting end, and it is judged that the position of the fan and the air outlet is aligned. When the fan needs to increase its speed after being moved, the control module increases the fan speed when it determines that the signal from the position sensor is an alignment signal, thereby avoiding loss of air supply volume.

[0030] like Figure 2As shown, the detailed process of the present invention when in use is described below.

[0031] When the air volume sensor detects that the wind speed is attenuated, the control module receives information about the faulty fan, such as the rotation speed in the operating data. The control module controls the baffle drive module to drive the baffle to open the inspection port, and at the same time controls the rotation speed of all EC fans to decrease. The control module controls the drive module to adjust the position of the EC fan until the faulty fan runs to the inspection port, and then the infrared sensor detects whether the other fans are aligned with the position of the air outlet again after moving. If the fan is aligned with the position of the air outlet again after moving, the control module adjusts the rotation speed of the remaining fans according to the preset value, and increases the rotation speed of the remaining fans until the air outlet parameters of the closed air duct reach the preset value.

[0032] When the EC fan is overhauled, the control module receives a signal and controls all fans to reduce their speed, opens the inspection port, and moves the overhauled fan to the corresponding position. The control module determines again whether the position of the moved fan is aligned with the position of the air outlet. If aligned, the speed of all fans is increased so that the air outlet parameters of the closed air duct can match the preset value. The control module uses the frequency conversion function of the EC fan itself to automatically increase the speed of other normal EC fans during the maintenance of the faulty fan to make up for the air volume loss caused by the shutdown of the faulty EC fan, so that the refrigeration and other functions of the unit during the maintenance period are not affected by attenuation.

[0033] The present invention also protects a corresponding air conditioning system, which uses the fan device in the above technical solution of the present invention. The air conditioning system of the present invention includes but is not limited to a combined air conditioning system.

[0034] Take the combined air conditioning system with multiple EC fans installed inside as an example. When there is an EC fan failure inside the unit, the air volume sensor detects a decrease in wind speed. Since the EC fan failure will cause the fan to stop, the air volume will flow back from the air outlet side of the faulty EC fan to the original air inlet side, causing the positive and negative air pressure directions of the faulty EC fan at this point to be opposite to those of the normal EC fan. At this time, the one-way air flow valve automatically closes to prevent air volume leakage. At the same time, the fault information of the EC fan will be uploaded to the control module. After receiving the fault information, the control module automatically controls other normal fans to reduce the frequency. The control drive module quickly adjusts the structural layout with the EC fan module, and automatically moves counterclockwise or clockwise until the faulty fan is operated to a position close to the inspection port. At this time, the baffle drive module synchronously raises the baffle, allowing the faulty EC fan to run directly to the external inspection port, and then drives the baffle to close the inspection port. The other normal EC fans will automatically increase the fan speed and run as usual after running to other fixed positions and being positioned by infrared sensors. At this time, the air volume sensor will automatically detect the air output parameters until the fan speed is increased to compensate for the air volume loss caused by the shutdown of the faulty EC fan. When the maintenance personnel take out the faulty fan from the external inspection port and complete the maintenance, they will put the maintained fan back into the inspection port and confirm the import to the control module. The baffle will rise again and close after the fan enters. The maintained fan will be automatically positioned by the infrared sensor, and the one-way airflow valve will be automatically opened at the same time. The air volume will be detected by the air volume sensor, and the speed of the remaining EC fans will be reduced. When the speeds of all fans are consistent and the air volume reaches the preset value, the adjustment will stop.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan device, characterized in that: include: A closed air duct, a plurality of fans installed in the closed air duct, an air inlet arranged at one end of the closed air duct, a plurality of air outlets arranged at the other end of the closed air duct, fans and one-way air flow valves arranged at the air outlets; when a fan fails, the one-way air flow valve corresponding to the fan is closed because the pressure on its air outlet side is less than the pressure on its air inlet side; It also includes an inspection port disposed on the outside of the closed air duct and connected to the closed air duct, a guide rail connecting each air outlet and the inspection port for installing the fan, and a driving module capable of driving any fan to move along the guide rail to the inspection port or any air outlet; The closed air duct and the inspection port are connected or blocked with each other by a movable baffle; Also included is a baffle driving module for driving the baffle to move; The control module further comprises a control module, which controls the rotation speed of all fans to decrease when it is determined that a fan fails, controls the baffle drive module to open the inspection port, controls the drive module to move the failed fan to the inspection port, controls the baffle drive module to close the inspection port after the failed fan reaches the inspection port, and controls the rotation speed of each fan according to a preset value and the current air outlet parameter of the closed air duct; It also includes a position sensor for detecting whether the position of the fan is aligned with the air outlet. When the fan needs to increase its speed after being moved, the control module increases the speed of the fan when it determines that the signal of the position sensor is an alignment signal.

2. The fan device according to claim 1, characterized in that: The air outlet parameters of the closed air duct are detected by a detection sensor.

3. The fan device according to claim 2, characterized in that: The air outlet parameter is air volume or wind speed.

4. The fan device according to claim 1, characterized in that: The position sensor is an infrared sensor.

5. The fan device according to claim 1, characterized in that: The fan is an EC fan.

6. An air conditioning system, characterized in that: A fan device as described in any one of claims 1 to 5 is used.

7. The air conditioning system according to claim 6, characterized in that: The air conditioning system is a combined air conditioning system.

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