JP2008202808A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To determine a plugging degree from a drive position of a suction panel, to change the rotating speed of a fan to ensure air blowing performance and further to maintain amenity. <P>SOLUTION: The plugged state of a filter (the accumulated state of dust or the like by sucking air) is determined from the temperature difference of a temperature sensor in the opening position of the suction panel, and when a fall of air capacity is determined, a great change in the rotating speed of the fan is made to recover air capacity. The air blowing performance of an indoor unit can thereby be maintained and improved. Since the rotating speed of the fan is increased when the filter is plugged (when air capacity decreases), the air capacity can be recovered. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  According to the present invention, in an indoor unit provided with a drive-type suction panel, the clogged state of the filter is judged based on the temperature difference of the temperature sensor that changes depending on the opening position of the suction panel, and the fan speed is greatly changed. The present invention relates to an air conditioner that prevents a decrease in the air volume due to clogging of the filter and thereby improves comfort.

  Usually, the air conditioner has a configuration in which a suction panel and a filter are provided in the upper part of the indoor unit, a blow-out grill is provided in the lower part, and a fan and a fan motor are provided in the vicinity of the blow-out opening.

  FIG. 1 is a view showing the appearance of a separate type air conditioner composed of an indoor unit 1 and an outdoor unit 2. FIG. 2 shows a drive-type suction panel 3, a fan 7, and a fan motor 9 in the indoor unit 1. It is a side view of the indoor unit which shows the temperature sensor 8 etc. which detect the temperature attached to the filter 4, the heat exchanger 5, and the heat exchanger 5.

  Hereinafter, the operation | movement and effect | action inside this indoor unit 1 are demonstrated. The drive-type suction panel 3 opens in the C direction, the air is sucked in from the A direction, passes through the filter 4, exchanges heat between the air sucked by the heat exchanger 5 and the fluid in the heat exchanger 5, and heat exchange The blown air is discharged from the blower outlet 6 in the B direction by the fan 7 driven by the fan motor 9.

  However, in the indoor unit configured as described above, a filter that removes dust or the like may be clogged with a lot of dust. As a result, the amount of air blown from the indoor unit is reduced, and the original air blowing performance cannot be ensured. Furthermore, the reach of cold air during cooling and warm air during heating is reduced, and the comfort of the room deteriorates.

In order to solve this problem, the number of rotations of the fan motor is switched according to the cumulative value of the operating time (see, for example, Patent Document 1), or clogging is estimated by the number of rotations of the fan motor and the number of rotations is controlled. (For example, refer to Patent Document 2).
JP 2002-61995 A Japanese Patent Laid-Open No. 3-67947

  The present invention relates to a technique for solving the above-described problem. Even when a filter is clogged in an indoor unit by judging a clogged state based on a temperature difference of a temperature sensor due to a change in the opening position of the suction panel, the air blower The purpose is to ensure performance.

  In order to solve the above-mentioned problem, the indoor unit of the present invention determines the clogged state of the filter (the state where dust is collected by sucking air) based on the temperature difference of the temperature sensor depending on the opening position of the suction panel. When the air volume is reduced, control is performed so that the air volume is recovered by greatly changing the rotational speed of the fan.

As a result, the suction air is reduced due to clogging of the filter of the indoor unit, and the air volume of the blown air is also greatly reduced. However, the fan is judged by the temperature difference of the temperature sensor depending on the suction panel position. The air volume can be recovered and increased to the original air volume by greatly changing the number of rotations.

  Further, the indoor unit of the present invention controls so as to determine whether the filter is clogged after a predetermined time from the start of the fan motor operation. Thereby, in the air conditioner composed of the indoor unit and the outdoor unit, in the cooling or heating operation, the operation is stable from the start of the fan motor operation, that is, by determining the clogged state of the filter after a certain time, The temperature difference can be detected in a stable state, and the clogged state can be accurately determined.

  Further, the indoor unit of the present invention controls to determine whether the filter is clogged after a certain cumulative time of the fan motor. As a result, the clogging increases with the fan motor operating time, so that the clogging state can be optimally determined by determining the clogging state of the filter of the indoor unit after the cumulative time of operation of the fan motor. is there.

  Moreover, the indoor unit of the present invention controls the opening degree of the suction panel so as to change greatly when it is determined that the filter is clogged. Thereby, the clogged state of the filter of the indoor unit can be eliminated, and the air volume can be recovered and increased.

  According to the indoor unit of the present invention, the control for judging the clogging due to the temperature difference of the temperature sensor at the opening position of the suction panel and greatly changing the fan rotation speed restores the air volume when the filter is clogged. In addition, the air blowing performance of the indoor unit can be maintained and improved. Further, when the filter is clogged (when the air volume is decreased), the fan speed is increased, so that the air volume can be recovered.

  In the first aspect of the invention, since the amount of suction air changes depending on the control of changing the rotation speed of the fan according to the temperature difference of the temperature sensor depending on the suction panel position, that is, the position of the suction panel, the temperature sensor value for each suction panel position is generated. Compare the temperature difference of the temperature sensor value by each suction panel position. Considering the temperature difference of the temperature sensor, if the filter is not clogged, the intake air volume changes and the temperature difference increases. If the filter is clogged (dust is attached to the filter), the change in the intake air volume will be small and the temperature difference will be small. From this, the clogged state is determined from the temperature difference in the temperature sensor at the suction panel opening position.

  If it is determined that the air is clogged, the fan speed is increased and the air intake air volume increases, so that the blown air volume also increases and compensates for the decrease in the air volume due to the clogged filter or the air volume. Can be increased. Further, when the air volume is returned to the conventional level, the noise can also be made equal.

  The second invention is a control for judging clogging after a certain time from the start of the fan motor operation, that is, judging by measuring the temperature difference of the temperature sensor after a lapse of time in which the cooling operation or the heating operation is stable. Thus, the clogging state can be accurately determined.

  According to a third aspect of the present invention, control for determining clogging after a certain cumulative operation time from the start of fan motor operation, that is, by determining the temperature difference of the temperature sensor after the cumulative operation time of the fan motor during cooling operation or heating operation. It can be judged in an optimally clogged state.

  In the fourth aspect of the invention, after the clogging is determined based on the temperature difference of the temperature sensor, the air volume is changed depending on the driving position of the suction panel, that is, the suction panel is opened to recover or increase the air volume in order to secure the air volume when clogged. Let From this, it is possible to increase the amount of air sucked in by the opening position of the suction panel, to increase the amount of blown air, and to compensate for the decrease in the amount of air by the clogged filter, thereby securing the conventional air volume.

(Embodiment)
FIG. 2 is a side sectional view of the indoor unit in the embodiment of the present invention. When the indoor unit 1 is operated, the suction panel 3 to be driven is opened in the C direction, the fan 7 is operated, and air is sucked from the A direction and the like, passes through the filter 4 and passes through the heat exchanger 5 and is blown. The air is blown out from the outlet 6 by the fan 7 in the B direction.

  FIG. 3 shows measurement positions D and E where temperature measurement is performed by the temperature sensor 8. When the suction panel 3 is driven and moved to the measurement positions D and E, temperature measurement is performed by the temperature sensor 8 at each position.

  When the temperature is measured by the temperature sensor 8 at the measurement position D and the measurement position E, a temperature difference occurs in the temperature of the temperature sensor 8 detected at each suction panel opening. At this time, as shown in FIG. 4, if the temperature difference due to the opening position is small, it is judged as clogged, and if the temperature difference is large, it is judged as not clogged. In this clogged state, the rotational speed is increased to control the air volume to be recovered or increased.

  FIG. 5 shows a change in sensor temperature from the start of operation. As shown in FIG. 5, in order to judge clogging, a temperature difference is measured after a certain time from the start of operation, and clogging is judged based on the temperature difference shown in FIG. Good.

  FIG. 6 shows the relationship between the operation time and the degree of clogging. As shown in FIG. 6, in order to determine clogging, a temperature difference may be measured after a certain cumulative time from the start of operation, and clogging may be determined from the temperature difference in FIG.

  Further, in the case of clogging, the air volume can be recovered or increased by changing the opening degree of the suction panel 3 from the opening degree D to the opening degree E as shown in FIG.

  As described above, the control of the fan motor according to the present invention makes it possible to determine the filter clogging state and recover the air volume based on the temperature difference of the temperature sensor that changes due to the change in the opening position of the suction panel. It can be applied to uses other than the harmony device.

Configuration diagram of an air conditioner having an outdoor unit and an indoor unit Side surface sectional drawing of the indoor unit in the air conditioning apparatus of this invention The figure which shows the measurement positions D and E in which the temperature measurement by the temperature sensor 8 is performed The figure which shows the relationship between the suction panel opening degree and temperature difference for clogging state judgment Diagram showing changes in sensor temperature from the start of operation Diagram showing the relationship between operating time and degree of clogging

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Outdoor unit 3 Suction panel 4 Filter 5 Heat exchanger 6 Air outlet 7 Fan 8 Temperature sensor 9 Fan motor A Air direction B Outlet direction C Drive direction D Drive position E Drive position

Claims (4)

Air having an indoor unit having a drive-type suction panel that opens back and forth, a filter, a heat exchanger, a temperature sensor that detects the temperature of the heat exchanger, a fan, and a fan motor that drives the fan 2. An air conditioner according to claim 1, further comprising: determining a clogged state of the filter based on a temperature difference measured by the temperature sensor at different suction panel positions, and changing the rotational speed of the fan. The air conditioner according to claim 1, wherein a state of clogging of the filter is determined after a predetermined time from the start of the fan motor operation. The air conditioner according to claim 1, wherein a state of clogging of the filter is determined after a certain cumulative operation time of the fan motor. The air conditioner according to any one of claims 1 to 3, wherein the opening degree of the suction panel is largely changed in accordance with a clogged state of the filter.

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