JP2015224555A - Pressure control method of vortex flow fan, and vortex flow fan system and vortex flow fan unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vortex flow fan which can be pressure-controlled through measurement of value of exhaust gas temperature increase.SOLUTION: A vortex flow fan system is provided which comprises: a vortex flow fan 100 including a fan casing having an annular flow passage ranging from a suction port to a discharge port, an impeller stored in the fan casing and generating vortex flow in the annular flow passage and a motor for rotationally driving the impeller; a first thermometer for measuring a suction side temperature at the suction port; a second thermometer 401 for measuring a temperature of discharge side at the discharge port; a solenoid valve 403 arranged at a flow passage of the discharge port; and a controller 402 for controlling opening/closing of the solenoid valve 403. The first thermometer and the second thermometer 401 are connected to the controller 402, which operates to open the solenoid valve 403 when an exhaust gas temperature increasing value that is a temperature difference between the suction side temperature and the exhaust side temperature reaches the first set temperature and to close the solenoid valve 403 when the exhaust gas temperature increasing value reaches the second set temperature lower than the first set temperature.

Description

The present invention relates to pressure control of a vortex fan.

  As background art of this technical field, there is JP 2013-249812 A (Patent Document 1). In Patent Document 1, since the coil temperature and bearing temperature increase values necessary to determine the usable range of the vortex fan are linked to the exhaust temperature increase value, the coil temperature and bearing temperature increase values As an alternative, a rise value of the exhaust temperature is used, and a relief valve that opens and closes according to the exhaust temperature is provided in the flow path from the fan casing to the discharge port. When the exhaust temperature rises, the relief valve is operated to release a part of the exhaust air to the outside Therefore, the usable range of the vortex-type blower is optimized.

  Conventionally, the static pressure of the vortex fan is controlled by providing a pressure gauge on the connecting pipe of the vortex fan and managing the operating point of the vortex fan by the numerical value of the pressure gauge.

JP 2013-249812 A

  The control of the static pressure of the vortex fan is performed by directly measuring the pressure with a pressure gauge, but the pressure gauge must be provided on the connection pipe, so the measurement point will change depending on the connection pipe. There was a problem.

  The present invention provides a vortex blower that enables pressure control without a pressure gauge.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-mentioned problems. For example, a swirl type fan system having a fan casing having an annular flow path from a suction port to a discharge port, and being stored in the fan casing. An impeller that generates a vortex in the annular channel, a vortex fan provided with a motor that rotationally drives the impeller, a first thermometer that measures the intake side temperature of the suction port, and the exhaust side of the discharge port A second thermometer for measuring temperature; an electromagnetic valve provided in a flow path of the discharge port; and a controller for controlling opening and closing of the electromagnetic valve. The controller includes the first thermometer and the second thermometer. When the exhaust temperature rise value, which is the temperature difference between the intake side temperature and the exhaust side temperature, reaches the first set temperature, the electromagnetic valve is opened and the second set temperature lower than the first set temperature is reached. If you want to close the solenoid valve To work.

According to the present invention, pressure can be measured without a pressure gauge by measuring the exhaust gas temperature rise value. Therefore, it is possible to provide a vortex fan that reduces the restriction of the installation location of the measuring device and enables pressure control that is easy to reproduce.

The block diagram of the eddy current type air blower used in Example 1 of this invention. The aerodynamic characteristic and exhaust temperature characteristic figure of the vortex-type air blower used in Example 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The whole block diagram of the vortex-type air blower using the thermometer, controller, and electromagnetic valve in Example 1 of this invention. The figure which shows the installation position of the thermometer in Example 1 of this invention. The aerodynamic characteristic and temperature characteristic figure of a vortex type air blower used in Example 2 of this invention. The vortex-type fan unit in Example 3 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a structural diagram of a vortex-type blower used in the present embodiment, where (A) is a side view and (B) is a front view.

  In FIG. 1 (A), the vortex-type blower 100 is composed of a motor 101, a fan casing 102, an impeller 103, and a sound absorber 104, and air that flows in from the sound absorber suction port 201 shown in FIG. 1 (B). Is a machine that passes through the fan casing flow path 105 and is discharged from the sound absorber discharge port 202 while being compressed by the rotation of the impeller 103. In other words, a fan casing having an annular flow path from the suction port to the discharge opening, an impeller that generates a vortex in the annular flow path stored in the fan casing, and a vortex type that includes a motor that rotationally drives the impeller It is a blower.

  The pressure of the vortex fan increases due to the load of the object. Along with this, the coil temperature, bearing temperature and exhaust temperature of the motor also rise. At this time, the exhaust gas temperature rise value is a difference between the temperature of the air sucked from the inlet of the vortex fan and the temperature of the air discharged from the outlet of the vortex fan.

  FIG. 2 is a characteristic diagram of the air volume-pressure characteristic 301 and the exhaust gas temperature rise value 302 of the vortex-type fan. The temperature rise of the vortex fan is linked to the pressure rise, and the exhaust temperature rise is also linked. That is, the pressure and the exhaust gas temperature increase value both monotonously decrease as the air volume increases (horizontal axis in FIG. 2). Therefore, if the air volume-pressure characteristics and the exhaust gas temperature rise value are measured in advance, the pressure can be calculated from the actually measured exhaust gas temperature rise value. Therefore, monitoring of the exhaust gas temperature increase value can be substituted for monitoring the pressure increase value of the vortex flow fan.

  FIG. 3 is an overall configuration diagram of a vortex fan system in which a thermometer 401, an electromagnetic valve 403, and a controller 402 are installed in the vortex fan. Exhaust air is discharged along the flow of wind indicated by 404, and the pressure of the vortex fan is adjusted by opening and closing an electromagnetic valve 403 provided in the flow path of the sound absorber discharge port 202.

  4 is a diagram for explaining the installation position of the thermometer 401 in FIG. 3, and is a front view of FIG. 3 as viewed from the left side of the drawing. As shown in FIG. 4, a thermometer 401 is installed in each of the ventilation paths on the intake side of the sound absorber suction port 201 and the exhaust side of the sound absorber discharge port 202 of the vortex-type blower. A controller 402 is connected to the thermometer to calculate the pressure based on the temperature difference between the intake side and the exhaust side.

  The controller 402 calculates a pressure value from the exhaust temperature rise value, which is a temperature difference between the intake side and the exhaust side, based on the characteristics of the vortex-type blower shown in FIG. 2, and sends a signal to the electromagnetic valve 403 based on the set pressure value. The controller 402 sends a signal for opening the valve to the electromagnetic valve when the predetermined first set temperature is reached, and sends a signal for closing the valve to the electromagnetic valve when the predetermined second set temperature is reached. Further, the upper limit value of the pressure to be managed is set as the first set temperature, and the lower limit value of the pressure to be managed is set as the second set temperature. That is, the second set temperature is lower than the first set temperature.

  The electromagnetic valve 403 includes a sensor that opens and closes the valve by a signal sent from the controller 402, and opens and closes the valve by a signal sent from the controller 402. Further, the electromagnetic valve can be used at any position as long as it is on the flow path piping of the vortex-type blower.

  As described above, the pressure management of the vortex fan can be performed without providing a pressure gauge by using the thermometer, controller and electromagnetic valve of the vortex fan. Therefore, it is possible to provide a vortex fan that reduces the restriction of the installation location of the measuring device and enables pressure control that is easy to reproduce.

In this embodiment, the case where the coil temperature rise value of the motor or the bearing temperature rise value is used instead of the exhaust temperature rise value used in the first embodiment will be described.

  FIG. 5 shows a characteristic diagram of the coil temperature rise value 303 and the bearing temperature rise value 304 in addition to the air volume-pressure characteristic 301 and the exhaust temperature rise value 302 of the vortex-type blower. Here, the coil temperature rise value and the bearing temperature rise value are temperature differences from the ambient temperature. As can be seen from this characteristic diagram, the coil temperature rise value and the bearing temperature rise value of the vortex-type blower are linked to the pressure rise, similarly to the exhaust temperature rise value. In other words, the pressure, the coil temperature rise value, and the bearing temperature rise value both monotonously decrease as the air volume increases (horizontal axis in FIG. 5). Therefore, if the air volume-pressure characteristics and the coil temperature rise value or the bearing temperature rise value are measured in advance, the pressure can be calculated from the actually measured coil temperature rise value or the bearing temperature rise value. Therefore, monitoring of the coil temperature rise value or the bearing temperature rise value can be substituted for monitoring the pressure rise value of the vortex fan.

  In addition, when the thermometer is installed in the air blower to check the abnormal heating of the motor, the pressure can be calculated by using the thermometer.

In the present embodiment, a vortex flow transmitter unit in which the vortex flow fan 100, a thermometer 401, an electromagnetic valve 403, and a controller 402 are unitized will be described.
6A and 6B are structural views of the sending machine unit of the present embodiment, where FIG. 6A is a side view and FIG. 6B is a front view. As shown in FIG. 6, the vortex fan 100, the thermometer 401, the electromagnetic valve 403, and the controller 402 are arranged on one base and handled as one sending machine unit.

  According to this embodiment, since a thermometer or the like has been installed in advance, if the air volume-pressure characteristics and the exhaust gas temperature rise value are measured under this arrangement condition, the pressure is calculated from the actually measured exhaust gas temperature rise value. In addition, there is an effect that the pressure can be calculated more accurately without causing an error due to different arrangement conditions.

  The present invention is not limited to the above-described embodiments, and includes various modifications. The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is also possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

100: Eddy current blower, 101: Motor, 102: Fan casing,
103: Impeller, 104: Sound absorber, 105: Flow path in fan casing,
201: Sound absorber suction port, 202: Sound absorber discharge port, 301: Air flow-pressure characteristics,
302: Exhaust temperature rise value, 303: Coil temperature rise value, 304: Bearing temperature rise value,
401: Thermometer, 402: Controller, 403: Electromagnetic valve,
404: Flow of wind in the flow path

Claims (3)

A fan casing having an annular flow path extending from the suction port to the discharge port, an impeller for generating a vortex in the annular flow passage stored in the fan casing, and a vortex blower provided with a motor for rotationally driving the impeller When,
A first thermometer for measuring an intake side temperature of the suction port;
A second thermometer for measuring the exhaust side temperature of the discharge port;
An electromagnetic valve provided in the flow path of the discharge port;
Having a controller for controlling the opening and closing of the electromagnetic valve;
The controller is connected to the first thermometer and the second thermometer, and when the exhaust temperature rise value, which is a temperature difference between the intake side temperature and the exhaust side temperature, reaches a first set temperature, the electromagnetic An eddy current blower system that opens a valve and closes the electromagnetic valve when a second set temperature lower than the first set temperature is reached. A fan casing having an annular flow path extending from the suction port to the discharge port, an impeller for generating a vortex in the annular flow passage stored in the fan casing, and a vortex blower provided with a motor for rotationally driving the impeller When,
A first thermometer for measuring an intake side temperature of the suction port;
A second thermometer for measuring the exhaust side temperature of the discharge port;
An electromagnetic valve provided in the flow path of the discharge port;
The first thermometer and the second thermometer are connected, and when the exhaust temperature rise value, which is the temperature difference between the intake side temperature and the exhaust side temperature, reaches the first set temperature, the electromagnetic valve is opened; A controller that closes the solenoid valve when a second set temperature lower than the first set temperature is reached;
An eddy current fan unit, wherein the vortex air fan, the first thermometer, the second thermometer, the electromagnetic valve, and the controller are arranged on one base. A fan casing having an annular flow path extending from the suction port to the discharge port, an impeller for generating a vortex in the annular flow passage stored in the fan casing, and a vortex blower provided with a motor for rotationally driving the impeller The pressure control method of
When an exhaust temperature rise value, which is a temperature difference between the intake side temperature of the suction port and the exhaust side temperature of the discharge port, reaches a first set temperature, an electromagnetic valve provided in the flow path of the discharge port is opened, A pressure control method for a vortex-type fan, wherein the electromagnetic valve is closed when a second set temperature lower than the first set temperature is reached.

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