Air blower and control method thereof

Abstract

The invention discloses an air blower and a control method thereof. The air blower comprises at least two fans which are arranged in parallel; the outlet of each fan is communicated with the output connector, and the output connector is used for collecting airflow of the outlets of the at least two fans and then outputting the airflow; the console is in signal connection with the fans, and the console is used for distributing the rotating speed or the pressure or the flow or the power of each fan based on user requirements and according to a preset rule; and the one-way switch piece is arranged on the communicating pipeline between the outlet of the fan and the output connector and is used for cutting off or opening the communicating pipeline. According to the air blower, the overall air volume of the air blower can be increased, the high-power and large-capacity use requirements are met, the structure is simple and easy to achieve, the use cost of a user is reduced, the failure rate is reduced, and the operation reliability of the air blower is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of blowers, and more specifically, to a blower. In addition, the present invention also relates to a control method for the above-mentioned blower. Background Art

[0002] The types of blowers include Roots blowers, multi-stage low-speed centrifugal blowers, single-stage high-speed centrifugal blowers, air suspension centrifugal blowers, and magnetic suspension centrifugal blowers. All of them are air supply equipment that use pressure differences to make gas flow.

[0003] Among them, air-suspended centrifugal blowers have the characteristics of highest efficiency, low noise, maintenance-free, and no oil leakage risk, and have been widely recognized by the market. However, it is difficult for air-suspended blowers to achieve large capacity; the magnetic bearing bearing capacity of the magnetic levitation centrifugal blower is significantly greater than that of the air suspension bearing, and a larger power can be achieved, but this form is difficult to control and has a high cost of use; although the two-stage air-suspended centrifugal blower increases the number of impellers, it is limited by the bearing capacity of the air suspension bearing, and the power of a single machine is not high; and the single-stage high-speed centrifugal blower uses a speed-increasing gearbox to increase the speed, which has the risk of oil leakage and a high failure rate.

[0004] In summary, how to provide a blower with high power, low use cost and low failure rate is a problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a blower that can increase the overall air volume of the blower, meet the use requirements of high power and large capacity, have a simple structure and are easy to implement, reduce the user's use cost, reduce the failure rate, and ensure the reliability of the blower during operation. Another purpose of the present invention is to provide a control method for the above-mentioned blower.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A blower, comprising:

[0008] A fan, at least two of which are arranged in parallel;

[0009] An output connector, the outlet of each of the fans is connected to the output connector, and the output connector is used to collect and output the airflows from the outlets of at least two fans;

[0010] A control console, connected to the fan signals, and used to allocate the speed, pressure, flow or power of each fan based on user needs and according to preset rules;

[0011] A one-way switch is provided on the connecting pipeline between the outlet of the fan and the output connector, and is used to cut off or open the connecting pipeline.

[0012] Preferably, the control console and each of the fans are connected via a frequency converter, and the frequency converter is used to change the output speed of the drive motor corresponding to the fan;

[0013] The preset rule includes that when the control console receives a user demand, it determines the output frequency of each of the frequency converters according to the output power of each of the fans and the output efficiency corresponding to the output power.

[0014] Preferably, a flow sensor is provided at the inlet of the fan, and the control console is used to analyze the output flow of the fan based on the preset rule and the value of the flow sensor to determine the operating status of the fan.

[0015] Preferably, a sensor element is provided in the fan for detecting the wind pressure of the fan, and the control console controls the opening and closing of the corresponding vent valve on the connecting pipeline according to the data of the sensor element.

[0016] Preferably, the one-way switch element is arranged in the airflow direction of the fan and close to the output connector, and at least one set of the vent valves is arranged between the fan and the one-way switch element.

[0017] Preferably, the sensor element is used to detect the operating temperature of the fan, and the control console is used to control the operation of the inverter according to data from the sensor element to adjust the operating speed and power of the fan.

[0018] Preferably, the output connector is a three-way connector, one air inlet of the three-way connector is connected to at least one of the fans on one side thereof, the other air inlet of the three-way connector is connected to at least one of the fans on the other side thereof, and the air outlet of the three-way connector is used to connect to an external gas-using device.

[0019] The present invention further provides a control method for a blower, which is applied to any of the above blowers, and the control method comprises:

[0020] The control console allocates the speed, pressure, flow or power of each fan according to user requirements and preset rules;

[0021] The control console controls the fan to start and monitors its working state, and controls the alarm module to alarm if the working state is abnormal;

[0022] When the output pressure of the fan is less than the pressure at the output joint, the one-way switch is closed.

[0023] Preferably, the control console controls the rotation speed or pressure or flow rate or power proportional distribution of the fans according to the output power of each fan and the output efficiency corresponding to the output power, and based on the rule of maximum output efficiency of at least two fans.

[0024] The blower provided by the present invention comprises an output connector, a fan, a control console, and a one-way switch, wherein at least two fans are arranged in parallel, and the outlet of each fan is connected to the output connector, and the airflow of at least two fans is converged and sent out through the output connector, and at least two fans can be operated in parallel to increase the overall air volume of the blower, meet the use requirements of high power and large capacity, and have a simple structure and are easy to implement, thereby reducing the user's use cost; in addition, the control console is connected to the fan signal, and the speed or pressure or flow or power of each fan is allocated based on user needs and set rules, so that the performance parameters output by the blower meet the settings under user needs. value, ensuring the operational reliability of the blower; and the one-way switch is arranged on the connecting pipeline between the outlet and the output connector of the blower. When there is a fan that does not need to work or a faulty fan among at least two fans, the one-way switch will not be opened to close its corresponding connecting pipeline, avoiding mutual interference between the fans. When a faulty fan occurs, the blower can still continue to operate, ensuring the reliability of the blower during operation; the fan is turned on to open the one-way switch to open the corresponding connecting pipeline. The opening of the fan here can meet the condition for opening the one-way switch, so that the one-way switch is opened to open its corresponding connecting pipeline for air supply.

[0025] The beneficial effects of the present invention are as follows: by arranging at least two fans in parallel, the overall air volume of the blower can be increased to meet the use requirements of high power and large capacity; the speed or pressure or flow or power of each fan can be allocated based on user needs and set rules through the control console to ensure operational reliability; and the problem of mutual interference between fans can be avoided and the failure rate can be reduced by setting a one-way switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 A structural schematic diagram of the blower provided by the present invention;

[0028] Figure 2 Another structural schematic diagram of the blower provided by the present invention.

[0029] Figure 1-Figure 2 , the reference numerals include:

[0030] 1- control console; 2- frequency converter; 3- fan; 4- vent valve; 5- one-way switch; 6- output connector; 7- adapter. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The core of the present invention is to provide a blower that can increase the overall air volume of the blower, meet the use requirements of high power and large capacity, have a simple structure and be easy to implement, reduce the user's use cost, reduce the failure rate, and ensure the reliability of the blower during operation. Another core of the present invention is to provide a control method for the above-mentioned blower.

[0033] The blower provided by the present invention includes a blower 3, an output connector 6, a control console 1, and a one-way switch 5. Figure 1 .

[0034] At least two fans 3 are arranged in parallel and the outlets of the fans 3 are connected to the output connector 6. The airflows at the outlets of at least two fans 3 are collected and outputted through the output connector 6. By connecting at least two fans 3 in parallel, the overall power and air output of the blower are increased, the flow adjustment range of the blower is expanded, and the user's usage scenarios are expanded. The overall structure is relatively simple, the assembly cost is low, and the user's usage cost is reduced.

[0035] The fans 3 arranged in parallel in the above process can be divided into multiple groups, each group includes at least two fans 3, and each group is controlled by the control console 1.

[0036] Optionally, the output connector 6 may be a three-way connector, a four-way connector, etc., and may be flexibly designed according to actual needs.

[0037] The control console 1 is connected to the fan 3 by signal, and is used to control the start and stop, speed, etc. of the fan 3. Based on user needs and preset rules, the control console 1 allocates the speed, pressure, flow rate or power of each fan 3. One of the four parameters, speed, pressure, flow rate or power, can be selected. If a certain power output is required, the power of the fan 3 at different gears is used to determine the best combination that can achieve this specific power, so that the blower has the highest operating efficiency when working.

[0038] It should be noted here that the user demand may include the number of running units. For example, if the user needs to turn on three fans 3 to achieve a specific power, the output power of the three fans 3 can be allocated through the control console 1 accordingly.

[0039] The preset rule here may be a correspondence between at least two of the rotation speed, pressure, flow rate or power, and allocation is performed based on meeting the demand while ensuring the operating performance of all fans 3 .

[0040] In addition, if only one fan 3 needs to be started, the preset rules include the fan operating parameters when the fan 3 is running. In this state, no allocation operation is required, and the control console 1 can be used to control the output of a single fan 3 to correspond to the speed, flow, pressure or efficiency.

[0041] Specifically, under the premise that at least two fans 3 are arranged in parallel in the blower, if three fans 3 are started and the others are not operating, the one-way switch components 5 corresponding to the non-operating fans 3 are in a closed state, and the corresponding connecting pipelines are in a closed state, so that the airflow of the working fans 3 will only flow to the output connector 6 and will not affect the other non-operating fans 3. There is no turbulence between the fans 3, thereby ensuring the reliable stability of the blower during operation and reducing the failure rate.

[0042] On the basis of setting up at least two fans 3, the blower can also have a redundant design. When a faulty fan occurs, the one-way switch 5 corresponding to the faulty fan is in a closed state. The control console 1 can promptly detect the fault based on the signal connection with the fan 3 and promptly shut down the faulty fan 3. Due to the existence of the one-way switch 5, the airflow will not flow in the opposite direction, and the entire blower continues to operate. Setting up multiple fans 3 to achieve a redundant design can also reduce the failure rate of the entire blower system and minimize the impact of fault shutdown on users.

[0043] In this embodiment, the models of at least two fans 3 may be consistent or inconsistent, without too much restriction, and can be flexibly designed according to actual application conditions.

[0044] In this embodiment, the blower should also include a cabinet, and at least two fans 3 are arranged in the cabinet.

[0045] The above-mentioned blower includes an output connector 6, a fan 3, a control console 1, and a one-way switch 5, wherein at least two fans 3 are arranged in parallel, and the outlet of each fan 3 is connected to the output connector 6, and the airflows of at least two fans 3 are sent out after being merged through the output connector 6. At least two fans 3 can be operated in parallel to increase the overall air volume of the blower, meet the use requirements of high power and large capacity, and have a simple structure and are easy to implement, thereby reducing the user's use cost;

[0046] The control console 1 is connected to the blower 3 by signals, and the speed, pressure, flow rate or power of each blower 3 is allocated based on user requirements and setting rules, so that the performance parameters output by the blower reach the set values ​​under user requirements, thereby ensuring the operating reliability of the blower;

[0047] The one-way switch 5 is arranged on the connecting pipeline between the outlet of the fan 3 and the output connector 6, and is used to cut off or open the connecting pipeline. When there is a fan 3 that does not need to work or a faulty fan 3 among at least two fans 3, the one-way switch 5 will not be opened to cut off and close the corresponding connecting pipeline, so as to avoid mutual interference between the fans 3, and if there is a faulty fan, the blower can still continue to operate, so as to ensure the reliability of the blower during operation; when the fan 3 is turned on and the outlet pressure of the fan is greater than the pressure of the output connector 6, the one-way switch 5 is opened, so that the corresponding connecting pipeline is opened to supply air.

[0048] On the basis of the above embodiment, the control console 1 and each fan 3 are connected via a frequency converter 2, and the frequency converter 2 is used to change the output speed of the drive motor corresponding to the fan 3;

[0049] The preset rule includes that when the control console 1 receives a user demand, the control console 1 determines the output frequency of each inverter 2 according to the output power of each fan 3 and the output efficiency corresponding to the output power.

[0050] Please refer to Figure 1 The control console 1 and the fans 3 are connected via a frequency converter 2. Each frequency converter 2 corresponds to a driving motor of each fan 3, that is, each fan 3 is powered separately. The output speed of the fan 3 is changed by the frequency converter 2 to achieve the adjustment of the overall power, flow, speed or pressure of the blower.

[0051] The frequency converter 2 is connected to the control console 1 via a signal line, and the signals between the two can be transmitted bidirectionally. The frequency converter 2 can receive a request from the control console 1 to start at a certain frequency to control the output speed of the drive motor corresponding to the fan 3, and the frequency converter 2 can transmit its working data to the control console 1, such as transmitting the working frequency at different times.

[0052] Based on the fact that the blower can achieve a high output efficiency under any working requirement, the above preset rules are set. The user inputs the required pressure or flow or speed or power to the control console 1 according to his own needs. The control console 1 performs comparative analysis based on the calibrated preset rules to determine the corresponding load of each fan 3 to achieve the highest operating efficiency.

[0053] Specifically, the preset rules include that when the control console 1 receives user demand, it determines the output frequency of each inverter 2 based on the output power of each fan 3 and the output efficiency corresponding to the output power. The output power of each fan 3 and the output efficiency corresponding to the output power are recorded in the control console 1. Each target output efficiency of the blower corresponds to a set of optimal combinations, and this optimal combination can be the corresponding number of fans 3, the corresponding output power and other performance parameters; when multiple fans 3 need to be operated, the control console 1 can quickly decompose the user demand upon receiving it, and allocate the output power target to the specific performance parameters of multiple fans 3, thereby improving the high-efficiency range of the blower and ensuring the efficient output of the blower.

[0054] Based on any of the above embodiments, a flow sensor is provided at the inlet of the fan 3, and the control console 1 is used to analyze the output flow of the fan 3 based on preset rules and the value of the flow sensor to determine the operating status of the fan 3.

[0055] A flow sensor is provided at the inlet of the fan 3. The flow rate at the inlet end and the flow rate at the outlet end of the fan 3 are substantially the same. The flow sensor for detecting the flow rate is provided at the inlet of the fan 3 to provide feedback on the output flow rate of each fan 3. In addition, by providing the flow sensor at the inlet of the fan 3, the detection is relatively simple and more accurate than providing it at the outlet.

[0056] The control console 1 analyzes the preset output flow of the fan 3 based on the preset rules and the value of the flow sensor at the inlet of the fan 3 to determine whether the fan 3 is started normally.

[0057] In addition, if a certain fan 3 fails, the control console 1 can control other normally operating fans 3 to start up as a replacement, which will not affect the overall operation of the blower, and the failure can be repaired later.

[0058] Based on any of the above embodiments, a set of one-way switch components 5 is provided at the outlet of each fan 3. Figure 1 and Figure 2 A set of one-way switch elements 5 is arranged at the outlet of each fan 3. The open state of the one-way switch element 5 corresponds to the connection between the connecting passage between the fan 3 and the output connector 6, and the closed state of the one-way switch element 5 corresponds to the disconnection of the connecting passage between the fan 3 and the output connector 6.

[0059] The opening and closing of the one-way switch 5 is determined in combination with the operating status of the fan 3. If the fan 3 is normally opened and the output pressure reaches the opening pressure of the one-way switch 5 (the output pressure of the fan 3 is greater than the pressure at the output connector 6), the one-way switch 5 is opened; if the output pressure of the fan 3 is less than the pressure at the output connector 6, the one-way switch 5 is closed.

[0060] On the basis of any of the above embodiments, a sensor element is provided in the fan 3 for detecting the wind pressure of the fan, and the control console 1 is used to control the opening and closing of the vent valve 4 on the corresponding connecting pipeline according to the data of the sensor element.

[0061] Please refer to Figure 1 and Figure 2 A vent valve 4 is provided on the communication passage between the fan 3 and the one-way switch member 5, which is used to vent the fan 3, specifically to discharge the output pressure of the fan 3 under an unstable state or an emergency state, so as to ensure the safe and stable operation of the fan 3.

[0062] Based on any of the above embodiments, the one-way switch 5 is arranged in the air flow direction of the fan 3 and close to the output connector 6, and at least one set of vent valves 4 is arranged between the air outlet of the fan 3 and the one-way switch 5.

[0063] Please refer to Figure 1-2 The one-way switch 5 is arranged in the airflow direction of the fan 3 and close to the output connector 6, so as to prevent the airflow of the operating fan 3 from flowing back into the non-operating fan 3 through the output connector 6, and also to avoid turbulence between the non-operating fan 3 and the operating fan 3.

[0064] At least one set of vent valves 4 is arranged between the air outlet of the fan 3 and the one-way switch 5. When the fan 3 is started and the one-way switch 5 is in the open state, the vent valve 4 can discharge part of the gas when the output pressure of the fan 3 is in an unstable state or in an emergency state, thereby ensuring the safe and reliable operation of the fan 3.

[0065] by Figure 1 For example, when corresponding to one fan 3, two vent valves 4 can also be set, and the actual design can be based on the specific situation.

[0066] On the basis of any of the above embodiments, the sensor element is used to detect the operating temperature of the fan 3 , and the control console 1 is used to control the operation of the inverter 2 to adjust the operating speed and power of the fan 3 according to the data of the sensor element.

[0067] The sensor element detects the operating temperature of the fan 3. The control console 1 is used to control the operation of the inverter 2 according to the data of the sensor element to adjust the operating speed and power of the fan 3. When the operating temperature of the fan 3 is too high, the power is reduced in time through frequency conversion to ensure the service life of the fan 3.

[0068] By setting the sensor element, the operating temperature and wind pressure of the fan 3 can be effectively detected, the working state of the fan 3 can be effectively monitored, the safe operation of the fan 3 can be ensured, and the failure rate can be reduced.

[0069] Based on any of the above embodiments, the output connector 6 is specifically a three-way connector, one air inlet of the three-way connector is connected to at least one fan 3 on one side of it, the other air inlet of the three-way connector is connected to at least one fan 3 on the other side of it, and the air outlet of the three-way connector is used to connect to an external gas-using device.

[0070] Please refer to Figure 1 If two fans 3 are arranged in parallel, the output connector 6 is specifically a three-way connector, the two air inlets of the three-way connector are correspondingly connected to the two fans 3, and the air outlet of the three-way connector is connected to an external gas-using device for use.

[0071] Please refer to Figure 2 If N fans 3 are arranged in parallel, multiple groups of fans 3 and output connectors 6 can be connected via adapters 7 .

[0072] The present invention also provides a control method for a blower, which is applied to any of the above blowers, and the control method comprises:

[0073] The control console 1 allocates the speed or pressure or flow rate or power of each fan 3 according to user requirements and preset rules to select the optimal combination performance parameters that can achieve maximum output efficiency and ensure the output efficiency of the blower;

[0074] The control console 1 controls the fan 3 to start and monitor its working state. If the working state is abnormal, the control alarm module will alarm to remind the operator to shut down the fan 3;

[0075] When the output pressure of the fan 3 is lower than the pressure at the output connector 6, the one-way switch 5 is closed, and the one-way switches 5 at the non-operating fans 3 and the faulty fans 3 are both in the closed state, avoiding interference with the normally operating fans 3 and ensuring the reliability of the operation of the entire blower.

[0076] After the blower completes the air supply operation, the control console 1 controls the working fan 3 to stop.

[0077] Based on the above embodiment, the control console 1 controls the rotation speed or pressure or flow rate or power proportional distribution of the fans 3 according to the output power of each fan 3 and the output efficiency corresponding to the output power, and based on the rule that at least two fans 3 output the maximum output efficiency.

[0078] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0079] The above is a detailed introduction to a blower and a control method thereof provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A blower, It is characterized in that include: A fan (3), at least two of the fans (3) are arranged in parallel; An output connector (6), the outlet of each of the fans (3) being connected to the output connector (6), the output connector (6) being used to collect and output the airflows from the outlets of at least two of the fans (3); A control console (1) connected to the fans (3) by signals, the control console (1) being used to allocate the speed, pressure, flow rate or power of each fan (3) based on user needs and in accordance with preset rules; A one-way switch (5) is provided on the connecting pipeline between the outlet of the fan (3) and the output connector (6), and is used to cut off or open the connecting pipeline.

2. The blower according to claim 1, It is characterized in that The control console (1) and each of the fans (3) are connected via a frequency converter (2), and the frequency converter (2) is used to change the output speed of the drive motor corresponding to the fan (3); The preset rule includes determining the output frequency of each of the frequency converters (2) based on the output power of each of the fans (3) and the output efficiency corresponding to the output power when the control console (1) receives a user demand.

3. The blower according to claim 2, It is characterized in that A flow sensor is provided at the inlet of the fan (3), and the control console (1) is used to analyze the output flow of the fan (3) based on the preset rule and the value of the flow sensor to determine the operating state of the fan (3).

4. The blower according to claim 2 or 3, It is characterized in that The fan (3) is provided with a sensor element for detecting the wind pressure of the fan (3), and the control console (1) controls the opening and closing of the corresponding vent valve (4) on the connecting pipeline according to data from the sensor element.

5. The blower according to claim 4, It is characterized in that The one-way switch component (5) is arranged in the airflow direction of the fan (3) and close to the output connector (6), and at least one set of the vent valves (4) is arranged between the fan (3) and the one-way switch component (5).

6. The blower according to claim 5, It is characterized in that The sensor element is used to detect the operating temperature of the fan (3), and the control console (1) is used to control the operation of the frequency converter (2) based on data from the sensor element to adjust the operating speed and power of the fan (3).

7. The blower according to claim 6, It is characterized in that The output connector (6) is specifically a three-way connector, one air inlet of the three-way connector is connected to at least one of the fans (3) on one side thereof, the other air inlet of the three-way connector is connected to at least one of the fans (3) on the other side thereof, and the air outlet of the three-way connector is used to connect to an external gas-using device.

8. A method for controlling a blower, It is characterized in that Applied to the blower according to any one of claims 1 to 7, the control method comprises: The control console (1) allocates the rotation speed, pressure, flow rate or power of each of the fans (3) according to user requirements and preset rules; The control console (1) controls the fan (3) to start and monitor its working state, and controls the alarm module to sound an alarm if the working state is abnormal; When the output pressure of the fan (3) is lower than the pressure at the output connector (6), the one-way switch (5) is closed.

9. The control method according to claim 8, It is characterized in that The control console (1) controls the rotation speed, pressure, flow rate or power distribution ratio of the fans (3) according to the output power of each fan (3) and the output efficiency corresponding to the output power, and based on the rule that at least two fans (3) output the maximum output efficiency.

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