JP6385068B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner including, for example, a ceiling-embedded indoor unit.

  As a conventional ceiling-embedded indoor unit, there is one provided with a temperature sensor using infrared rays, for example, in order to grasp an accurate temperature distribution in a room for air conditioning. Based on the temperature distribution data detected by the temperature sensor, the direction of the conditioned air is determined from the outlet and the distribution of the air volume is adjusted so that there is no temperature difference in the air-conditioning area, and unnecessary air conditioning is performed. Eliminating energy-saving airflow control is performed (for example, see Patent Document 1).

JP 2003-194389 (page 2-10, FIG. 2)

  Conventional ceiling-embedded indoor units often have a plurality of air outlets for one fan, and the air direction and the air volume are distributed by the air direction plates of each air outlet. However, if the rotational speed of the fan remains the same and the wind direction is adjusted with the wind direction plate, the air volume may decrease depending on the wind direction. As a result, it took a lot of time to bring the room close to the target temperature. In addition, when the airflow is reduced by adjusting the airflow direction plate, it can be solved by increasing the fan speed, but the fan's rotating sound becomes louder or more intense airflow is applied to the user, causing discomfort. There was a problem.

  The present invention has been made to solve the above-described problems, and can control the air direction and the air volume without increasing the rotational speed of the fan, thereby improving comfort and energy saving. The purpose is to obtain an air conditioner that can be used.

An air conditioner according to the present invention includes at least one suction port provided in a decorative panel exposed from a ceiling surface, and a plurality of air blowing plates provided in the decorative panel and having a wind direction plate that is vertically variable with respect to the floor surface. An outlet, a plurality of heat exchangers provided in correspondence with the plurality of outlets, and provided in correspondence with the plurality of outlets, sucking indoor air from the inlet and from the outlet through the heat exchanger An indoor unit having a plurality of blowers to be blown into the room, and the indoor unit further rotates in a direction opposite to each other from the plurality of air outlets to detect a temperature distribution. If, when the area with a temperature difference of the detected temperature distribution by the temperature sensor exists, among the plurality of fans, to control the rotational speed of the blower for blowing air to the outside et rear area, double Of the air outlet, and a control device for controlling the angle of the wind direction plate of the air outlet directed towards the area side with a temperature difference, the temperature sensor is an infrared sensor, the air blown out from the air outlet At both ends in a direction orthogonal to the direction, there are side plates whose tips are formed in a semicircular shape .

  According to the present invention, when there is an area having a temperature difference in the temperature distribution detected by the temperature sensor, the rotational speed of the blower that blows air to an area other than the area among the plurality of blowers is controlled. . For this reason, the temperature of the area with a temperature difference can be brought close to the ambient temperature in a state where the rotational noise of the blower is suppressed. Moreover, since the angle of the wind direction plate of the air outlet directed to the area side having the temperature difference among the plurality of air outlets is controlled, the time for bringing the temperature of the area having the temperature difference close to the ambient temperature is set. Faster and more comfortable and energy saving.

The perspective view which shows the external appearance of the indoor unit of the air conditioner which concerns on Embodiment 1. FIG. Sectional drawing which shows the inside of the indoor unit of FIG. 1 typically. The perspective view which expands and shows the temperature sensor of FIG. The perspective view which shows typically the inside of the indoor unit of the air conditioner which concerns on Embodiment 2. FIG.

Embodiment 1 FIG.
1 is a perspective view showing the appearance of an indoor unit of an air conditioner according to Embodiment 1, FIG. 2 is a cross-sectional view schematically showing the interior of the indoor unit of FIG. 1, and FIG. 3 is an enlarged view of the temperature sensor of FIG. It is a perspective view shown.
The air conditioner according to Embodiment 1 includes an indoor unit 1 and an outdoor unit connected to the indoor unit 1 via a refrigerant pipe. The indoor unit 1 is, for example, a ceiling-embedded indoor unit that is attached so that the rectangular decorative panel 2 is exposed from the ceiling surface.

  As shown in FIG. 1, the indoor unit 1 includes two air outlets 3 and 4 provided at both ends in the short direction of the decorative panel 2 and 3 provided between the air outlets 3 and 4 of the decorative panel 2. Two rectangular suction ports 5 a, 5 b, 5 c, and a temperature sensor 6 disposed on one side of both ends of the decorative panel 2 in the longitudinal direction between the blowout ports 3, 4 are provided.

  The temperature sensor 6 is installed by adjusting the temperature of the conditioned air blown from the air outlets 3 and 4 (temperature lower than room temperature during cooling and temperature higher than room temperature during heating), the temperature of the indoor unit 1 itself, and the inlets 5a and 5b. This is a position where the temperature of the indoor air sucked into 5c is not detected. That is, the temperature sensor 6 is installed at a position where only the indoor temperature during air conditioning can be detected.

  The air outlets 3 and 4 are respectively provided with wind direction plates 3a and 4a that change the air direction in the vertical direction with respect to the floor surface. As shown in FIG. 2, the wind direction plates 3a and 4a are attached to shafts 7 and 8 extending in the longitudinal direction of the air outlets 3 and 4, respectively. Although not shown, the shafts 7 and 8 are configured to be interlocked with a mechanism having a motor so that the rotation direction can be switched.

  In the interior of the indoor unit 1, as shown in FIG. 2, two sets of heat exchangers 9 and 10, two cross-flow fans 11 and 12 (blowers), a cross-flow fan 11 and a blow-out port 3, and An air passage 13 formed between the cross-flow fan 12 and the outlet 4 and a control device 20 are provided. The heat exchanger 9 includes a first heat exchanger 9a whose upper part is inclined toward the suction port 5a and a second heat exchanger 9b whose upper part is inclined toward the suction port 5b. Another set of heat exchangers 10 includes a first heat exchanger 10a whose upper part is inclined toward the inlet 5a and a second heat exchanger 10b whose upper part is inclined toward the inlet 5c. .

  The cross-flow fans 11 and 12 are cylindrical fans that are long in the longitudinal direction of the indoor unit 1. The cross-flow fan 11 is disposed between the first heat exchanger 9 a and the second heat exchanger 9 b of the heat exchanger 9, and the cross-flow fan 12 is the first heat exchanger 10 a and the second heat exchanger 10 of the heat exchanger 10. It arrange | positions between the exchangers 10b. By operating the cross-flow fans 11 and 12, indoor air is sucked from the suction ports 5 a, 5 b and 5 c and blown out from the blowout ports 3 and 4 through the heat exchangers 9 and 10. The heat exchangers 9 and 10 function as an evaporator during the cooling operation, and function as a condenser during the heating operation.

  The temperature sensor-6 is composed of an infrared sensor, and as shown in FIG. 2, makeup is performed so as to rotate in the blowing directions A and B of air (conditioned air) blown in the opposite directions from the blowout ports 3 and 4. It is attached to the panel 2 so as to be rotatable (G direction). As shown in FIG. 3, the temperature sensor 6 protrudes from a quadrangular hole 14 provided in the decorative panel 2, and is a direction orthogonal to the direction of air blown from the blowout ports 3, 4, that is, Side plates 6a having tips formed in a semicircular shape are provided at both ends in the direction perpendicular to the G direction. This semicircular side plate 6a is provided so as not to impair the design of the decorative panel 2, and is provided to accurately detect the temperature distribution in the room while the temperature sensor 6 is rotating. . The temperature sensor 6 is rotated in the above-described G direction by a mechanism having a motor, and detects an indoor space as a temperature detection range H.

  When there is an area with a temperature difference in the temperature distribution of the temperature detection range H detected by the temperature sensor 6, the control device 20 blows air to an area other than the area among the plurality of cross-flow fans 11 and 12. While controlling the operation of the once-through fan 11 or 12 or reducing the rotational speed, the airflow direction plate 3a or the air outlet of the air outlet 3 that is directed to the area side having a temperature difference among the air outlets 3 and 4 The angle of the four wind direction plates 4a or both of the wind direction plates 3a and 4a is controlled. The control of the rotational speed of the cross-flow fans 11 and 12 and the control of the angle of the wind direction plates 3a and 4a of the outlets 3 and 4 by the control device 20 will be described in detail when the operation is described.

The operation of the indoor unit 1 configured as described above will be described.
When performing the cooling operation or the heating operation, the control device 20 controls the mechanism of the temperature sensor 6 so that the temperature sensor 6 is rotated in the blowing directions A and B at regular intervals, for example. At this time, the temperature sensor 6 detects the temperature distribution in the temperature detection range H of the indoor space and inputs it to the control device 20.

  When the temperature distribution of the temperature detection range H is input, the control device 20 determines whether there is a temperature difference between the temperature distribution on the blowing direction A side and the temperature distribution on the blowing direction B side. When there is an area having a temperature difference equal to or higher than the first set temperature (for example, 10 deg) in the temperature distribution, the control device 20 sets the air to the area side of the cross-flow fans 11 and 12 that has a temperature distribution close to the target temperature, for example. The operation of the cross-flow fan 11 that blows air is stopped.

  At this time, the control device 20 keeps the wind direction plate 3a of the outlet 3 on the side of the cross-flow fan 11 as it was before the cross-flow fan 11 was stopped. That is, the air outlet 3 is not closed by the wind direction plate 3a. When the air outlet 3 is closed with the wind direction plate 3a, the user who sees the state may misunderstand that the indoor unit 1 has been stopped without permission, so do not close the air outlet 3 (or the air outlet 4). I have to. When the cross-flow fan 11 on the outlet 3 side is stopped, the control device 20, for example, out of the outlets 3 and 4, the outlet 4 directed to the area side having a temperature difference equal to or higher than the first set temperature in the temperature distribution. Then, the angle of the wind direction plate 4a of the outlet 4 is controlled so that the air is directed to the area.

  The control device 20 has a temperature difference between the temperature distribution on the blowing direction A side and the temperature distribution on the blowing direction B side that is lower than the first set temperature (10 deg) and lower than the first set temperature (for example, 5 deg). When there is a certain area, for example, the rotational speed of the cross-flow fan 11 that blows air to the area side having a temperature distribution close to the target temperature among the cross-flow fans 11 and 12 is made lower than the previous rotational speed. For example, when the two cross-flow fans 11 and 12 are operated at a rotational speed of 1000 rpm, the rotational speed of the cross-flow fan 11 is reduced to 500 rpm.

  When the control device 20 reduces the rotation speed of the cross-flow fan 11 on the outlet 3 side, for example, the temperature distribution of the outlets 3 and 4 is less than the first set temperature (10 deg) and the first set temperature. The angle of the airflow direction plate 4a of the blower outlet 4 is controlled so that the air is directed to the area from the blower outlet 4 directed to the area side having a temperature difference equal to or higher than the low second set temperature (5 deg).

  As described above, in the first embodiment, the temperature sensor 6 is provided with the semicircular side plates 6a at both ends, and the temperature sensor-6 is rotated in the blowing directions A and B. The temperature distribution in the room during the rotation of the temperature sensor 6 can be accurately detected without impairing the design.

  Furthermore, when there is an area where the temperature distribution on the blowing direction A side and the temperature distribution on the blowing direction B side have a temperature difference equal to or greater than the first set temperature (10 deg), air is present on the area side having a temperature distribution close to the target temperature. The operation of the once-through fan 11 or 12 that blows air is stopped, and the temperature difference is less than the first set temperature (10 deg) and lower than the first set temperature (for example, 5 deg) in the above temperature distribution. When there is a certain area, the rotational speed of the once-through fan 11 or 12 that blows air to the area side having a temperature distribution close to the target temperature is set lower than the previous rotational speed. Thereby, the room temperature can be brought close to the target temperature in a state where the rotational noise of the cross-flow fans 11 and 12 is suppressed.

  When the operation of the cross-flow fan 11 or 12 is stopped, the air direction of the air outlet 3 or 4 is such that the air blown out from the air outlets 3 and 4 directed toward the area having the temperature difference is directed to the area having the temperature difference. When the angle of the plates 3a and 4a is controlled and the rotational speed of the cross-flow fan 11 or 12 is reduced, the air blown out from the outlet 3 or 4 directed to the area side where the temperature difference is The angle of the wind direction plates 3a and 4a of the air outlet 3 or 4 is controlled so as to go to a certain area. For this reason, the time taken to bring the temperature of an area with a temperature difference close to the target temperature is increased, and comfort and energy saving can be achieved.

Embodiment 2. FIG.
FIG. 4 is a perspective view schematically showing the inside of the indoor unit of the air conditioner according to the second embodiment. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals.
In FIG. 4, the decorative panel 2 of the indoor unit 1 is formed in a square shape, and four air outlets 31, 32, 33, and 34 are provided on each side. Although not shown, each air outlet 31 to 34 is provided with a wind direction plate that varies the wind direction in the vertical direction with respect to the floor surface. A suction port 35 is provided at the center of the decorative panel 2.

  A heat exchanger 36 a and a cross-flow fan 38 a are arranged between the air outlet 31 and the suction port 35 from the upstream side in the air flow direction C, and the air flow between the air outlet 32 and the suction port 35. A heat exchanger 36b and a cross-flow fan 38b are arranged from the upstream side in the direction E. A heat exchanger 37a and a cross-flow fan 39a are arranged between the air outlet 33 and the suction port 35 from the upstream side in the air flow direction D. A heat exchanger 37b and a cross-flow fan 39b are arranged from the upstream side in the flow direction F of the air.

  Temperature sensors 61 a and 61 b made of infrared sensors are installed at corners of the surface of the decorative panel 2 facing the floor surface. The temperature sensor 61a is attached to the decorative panel 2 so as to be rotatable (G direction) so as to be rotated in the blowing directions C and E of air (conditioned air) blown in opposite directions from the outlets 31 and 32. ing. Moreover, the temperature sensor 61b is rotatably attached to the decorative panel 2 so as to rotate in the blowing directions D and F of the air blown in the opposite directions from the outlets 33 and 34.

  As shown in FIG. 3, the temperature sensors 61 a and 61 b protrude from a quadrangular hole 14 provided in the decorative panel 2, and the tip is formed in a semicircular shape at both ends in a direction orthogonal to the rotation direction. The side plate 6a is provided. The temperature sensors 61a and 61b are rotated in the above-described direction by a mechanism having a motor, and the indoor space is detected as a temperature detection range H.

  The control of the rotational speed of the once-through fans 38a and 38b based on the temperature distribution of the temperature detection range H detected by the temperature sensor 61a and the angle control of each wind direction plate of the outlets 31 and 32 are the same as in the first embodiment. It is the same. Further, the control of the rotational speeds of the once-through fans 39a and 39b based on the temperature distribution of the temperature detection range H detected by the temperature sensor 61b and the angle control of the wind direction plates of the outlets 33 and 34 are also the same as those in the first embodiment. It is the same. These controls are performed by the control device 40.

  In the second embodiment, semicircular side plates 6a are provided at both ends of the temperature sensors 61a and 61b, the temperature sensor 61a is rotated in the blowing directions C and E, and the temperature sensor 61b is blown out. Since it rotates in the directions D and F, the design characteristics of the decorative panel 2 are not impaired, and the temperature distribution in the room during the rotation of the temperature sensors 61a and 61b can be accurately detected. .

Further, when there is an area where the temperature distribution on the blowing direction C side and the blowing direction E side has a temperature difference equal to or higher than the first set temperature (10 deg), the once-through air that blows air to the area side having the temperature distribution close to the target temperature When the operation of the fan 38a or 38b is stopped and there is an area where the temperature distribution on the blowing direction D side and the blowing direction F side has a temperature difference equal to or more than the first set temperature (10 deg), the temperature distribution close to the target temperature The operation of the cross-flow fan 39a or 39b for blowing air to the area side having
When there is an area having a temperature difference of less than the first set temperature (10 deg) and lower than the first set temperature (5 deg) or more in the temperature distribution on the blowing direction C side and the blowing direction E side, the target temperature is reached. The rotational speed of the once-through fan 38a or 38b that blows air to the area side having a close temperature distribution is made lower than the previous rotational speed, and the first set temperature is set in the temperature distribution on the blowing direction D side and the blowing direction F side. When there is an area with a temperature difference of less than (10 deg) and lower than the first set temperature and higher than the second set temperature (5 deg), cross-flow fans 39a and 39b that blow air to the area side having a temperature distribution close to the target temperature Is set to be lower than the previous rotation speed.
With the above control, the room temperature can be brought close to the target temperature while the rotational noise of the cross-flow fans 38a, 38b, 39a, 39b is suppressed.

When the operation of the once-through fan 38a or 38b is stopped or when the rotational speed of the once-through fan 38a or 38b is reduced, the air blown out from the outlet 31 or 32 directed to the area side having a temperature difference Control the angle of the airflow direction plate of the outlet 31 or 32 so that it goes to an area with a temperature difference, and when the operation of the cross-flow fan 39a or 39b is stopped, the rotation speed of the cross-flow fan 39a or 39b is also set. When lowered, the angle of the wind direction plate of the outlet 33 or 34 is controlled so that the air blown out from the outlet 33 or 34 directed to the area having the temperature difference is directed to the area having the temperature difference. doing.
With the above control, the time required to bring the temperature of an area with a temperature difference closer to the target temperature is increased, and comfort and energy saving can be achieved.

In the first and second embodiments, the indoor space is detected by the temperature sensors 6, 61a, 61b, but the floor may be used as the temperature detection range instead of the indoor space, or the detection range. You may make it detect the temperature of the inside human body.
In the first and second embodiments, the first set temperature is 5 deg and the second set temperature is 10 deg. However, each set temperature is not limited and may be any number of times.

  1 indoor unit, 2 decorative panel, 3, 4 air outlet, 3a, 4b wind direction plate, 5a, 5b, 5c suction port, 6 temperature sensor, 6a side plate, 7, 8 shaft of wind direction plate, 9, 10 heat exchanger, 9a, 10a 1st heat exchanger, 9b, 10b 1st heat exchanger, 11, 12 Cross-flow fan, 13 Air passage, 14 holes, 20 Control device, 31, 32, 33, 34 Air outlet, 35 Suction port, 36a 36b 37a, 37b Heat exchanger, 38a, 38b, 39a, 39b Cross-flow fan, 40 Control device, 61a, 61b Temperature sensor, A, B, C, D, E, F Blowing direction, G movable direction, H Temperature detection range.

Claims (6)

A plurality of air outlets provided in the decorative panel exposed from the ceiling surface, a plurality of air outlets provided in the decorative panel and having a wind direction plate that is vertically variable with respect to the floor surface; and the air outlets A plurality of heat exchangers provided corresponding to the plurality of air outlets and the plurality of air outlets, sucking indoor air from the suction ports and blowing out the air from the air outlets through the heat exchanger. An indoor unit having a plurality of blowers,
The indoor unit further rotates at least one temperature sensor that detects the temperature distribution by rotating in the direction of air blown in opposite directions from the plurality of outlets, and the temperature distribution detected by the temperature sensor. When there is an area with a temperature difference, the rotation speed of the blower that blows air to an area other than the area among the plurality of blowers is controlled, and the area side with a temperature difference among the plurality of outlets A control device for controlling the angle of the wind direction plate of the air outlet directed to
The temperature sensor is an infrared sensor, and has an air plate characterized by having side plates whose ends are formed in a semicircular shape at both ends in a direction orthogonal to the direction of the air blown out from the air outlet. Harmony machine. A plurality of air outlets provided in the decorative panel exposed from the ceiling surface, a plurality of air outlets provided in the decorative panel and having a wind direction plate that is vertically variable with respect to the floor surface; and the air outlets A plurality of heat exchangers provided corresponding to the plurality of air outlets and the plurality of air outlets, sucking indoor air from the suction ports and blowing out the air from the air outlets through the heat exchanger. An indoor unit having a plurality of blowers,
The indoor unit is further detected by at least one temperature sensor that rotates in the direction of air blown in opposite directions from the plurality of outlets and detects temperature distribution in a plurality of areas, and the temperature sensor. When there is a temperature difference equal to or greater than the first set temperature between the temperature distributions for each area, the operation of the blower for blowing air to the area side having a temperature distribution relatively close to the target temperature is stopped, and the plurality of blowers are Control that controls the angle of the wind direction plate of the outlet so that air blown out from the outlet directed to the area side having a temperature distribution relatively away from the target temperature is directed to the area. And an air conditioner. When there is a temperature difference between the temperature distributions for each area detected by the temperature sensor and not less than the first set temperature but not less than the second set temperature, the control device sets the target temperature. The air conditioner according to claim 2, wherein the rotational speed of a blower that blows air to an area side having a relatively close temperature distribution is lower than the rotational speed before that. When the control device has a temperature difference between the temperature distributions for each area detected by the temperature sensor and the temperature distribution is not less than the first set temperature and lower than the first set temperature, the temperature distribution is not less than the second set temperature. The angle of the wind direction plate of the air outlet is controlled so that the air blown out from the air outlet directed to the area side having a temperature distribution relatively far from the target temperature is directed to the area. The air conditioner according to claim 2 or 3 . The temperature sensor is an infrared sensor, and has side plates whose ends are formed in a semicircular shape at both ends in a direction perpendicular to the direction of air blown from the blower outlet. Item 5. The air conditioner according to any one of Items 2 to 4 . The air conditioner according to any one of claims 1 to 5 , wherein a cross-flow fan is used for the blower.

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