TWI674380B - air conditioner - Google Patents

Abstract

Provide an air conditioner with high reliability in consideration of the durability of the fan cleaning unit. The air conditioner (100) includes: an indoor heat exchanger (15); an indoor fan (16); a fan cleaning unit (24); an up-and-down air direction plate (23); The fan cleaning section (24) includes a shaft section (24a) parallel to the axial direction of the indoor fan (16), a brush (24b) provided on the shaft section (24a), and a shaft section (24a) and a brush (24b). Rotating second drive unit. The margin of the torque of the second driving section is larger than the margin of the torque of the first driving section.

Description

air conditioner

The present invention relates to an air conditioner.

As a technique for cleaning an indoor fan of an air conditioner, for example, Patent Document 1 discloses a person provided with a “fan cleaning device for removing dust from the fan”. Prior Art Literature Patent Literature

Patent Document 1: Japanese Patent No. 4046755

[Problems to be Solved by the Invention]

In Patent Document 1, as described above, a configuration for cleaning an indoor fan is described, but a configuration for considering the durability of a motor or a gear of a fan cleaning device is not described.

An object of the present invention is to provide an air conditioner with high reliability in consideration of the durability of the fan cleaning unit. [Means to solve the problem]

In order to solve the above-mentioned problems, the air conditioner of the present invention is characterized by including: a heat exchanger; a fan; a fan cleaning unit for cleaning the fan; an up-and-down wind direction plate for up-and-down direction of air blown out by the driving of the fan; The wind direction is adjusted; and a first drive unit that rotates the up-and-down wind direction plate; the fan cleaning unit includes: a shaft portion parallel to an axial direction of the fan; a brush provided on the shaft portion; and the shaft portion and the brush The second driving portion that rotates; the margin of the torque of the second driving portion is greater than the margin of the torque of the first driving portion. [Effect of the invention]

According to the present invention, it is possible to provide an air conditioner with high reliability in consideration of the durability of the fan cleaning portion.

≪Embodiment≫ <Configuration of Air Conditioner> FIG. 1 is a configuration diagram of a refrigerant circuit Q of an air conditioner 100 according to an embodiment. In addition, the solid arrows in FIG. 1 indicate the flow of the refrigerant during heating operation. In addition, the dotted arrows in FIG. 1 indicate the flow of the refrigerant during the operation of the cold room. The air conditioner 100 is an air conditioner for heating operation or cooling room operation. As shown in FIG. 1, the air conditioner 100 includes a compressor 11, an outdoor heat exchanger 12, an outdoor fan 13, and an expansion valve 14. In addition to the above configuration, the air conditioner 100 includes an indoor heat exchanger 15 (heat exchanger); an indoor fan 16 (fan); and a square valve 17.

The compressor 11 is a machine that compresses a low-temperature and low-pressure gas refrigerant and discharges it as a high-temperature and high-pressure gas refrigerant, and has a compressor motor 11a as a driving source. (2) The outdoor heat exchanger 12 is a heat exchanger that performs heat exchange between a refrigerant flowing through a heat transfer pipe (not shown) and outside air sent from the outdoor fan 13.

The outdoor fan 13 is a fan that sends outside air into the outdoor heat exchanger 12. The outdoor fan 13 includes an outdoor fan motor 13 a as a driving source, and is disposed near the outdoor heat exchanger 12. The expansion valve 14 is a valve that decompresses the refrigerant condensed by the "condenser" (one of the outdoor heat exchanger 12 and the indoor heat exchanger 15). The refrigerant system decompressed through the expansion valve 14 is introduced into an "evaporator" (the other of the outdoor heat exchanger 12 and the indoor heat exchanger 15).

The indoor heat exchanger 15 is a heat exchanger that performs heat exchange between the refrigerant flowing through the heat transfer tube g (see FIG. 2) and the indoor air (air in the air-conditioned space) sent from the indoor fan 16. The indoor heat exchanger 15 includes a plurality of fins f (see FIG. 2) arranged at a predetermined interval from other adjacent fins f, and a plurality of heat transfer tubes g ( (See Figure 2).

The indoor fan 16 is a fan that sends indoor air into the indoor heat exchanger 15, and has an indoor fan motor 16c (see FIG. 7) as a driving source. The indoor fan 16 is, for example, a cylindrical cross-flow fan, and is arranged near the indoor heat exchanger 15.

The square valve 17 is a valve that switches the flow path of the refrigerant in accordance with the operation mode of the air conditioner 100. For example, during air-conditioning operation (refer to the dotted arrow in FIG. 1), the compressor 11, the outdoor heat exchanger 12 (condenser), the expansion valve 14, and the indoor heat exchanger 15 (evaporator) are sequentially transmitted through the square valve 17. In the connected refrigerant circuit Q, the refrigerant is circulated in a refrigeration cycle.

On the other hand, during heating operation (see the solid arrow in FIG. 1), the compressor 11, the indoor heat exchanger 15 (condenser), the expansion valve 14, and the outdoor heat exchanger 12 are sequentially transmitted through the square valve 17. In the refrigerant circuit Q (evaporator) connected, the refrigerant is circulated in a refrigeration cycle.

That is, in the refrigerant circuit Q in which the refrigerant circulates through the compressor 11, the "condenser", the expansion valve 14, and the "evaporator" in sequence, one of the "condenser" and "evaporator" is outdoor heat exchange. Device 12 and the other side is an indoor heat exchanger 15.

In the example shown in FIG. 1, the compressor 11, the outdoor heat exchanger 12, the outdoor fan 13, the expansion valve 14, and the square valve 17 are installed in the outdoor unit Uo. On the other hand, the indoor heat exchanger 15 and the indoor fan 16 are installed in the indoor unit Ui.

FIG. 2 is a longitudinal sectional view of the indoor unit Ui. In addition, FIG. 2 shows a state where the fan cleaning unit 24 is retracted from the indoor fan 16. The indoor unit Ui includes, in addition to the indoor heat exchanger 15 or the indoor fan 16 described above, a water pan 18, a frame base 19, filters 20 a and 20 b, and a front panel 21. Furthermore, the indoor unit Ui further includes left and right airflow direction plates 22, up and down airflow direction plates 23, and a fan cleaning unit 24.

The water pan 18 is a person who receives the condensate from the indoor heat exchanger 15 and is arranged below the indoor heat exchanger 15. The indoor fan 16 includes a plurality of fan blades 16a in addition to the indoor fan motor 16c (see FIG. 7) as a driving source, and a partition plate 16b (see also FIG. 3) for providing the fan blades 16a.

The housing base 19 is a housing for installing equipment such as the indoor heat exchanger 15 or the indoor fan 16. The filters 20a and 20b catch dust from the air flowing to the indoor heat exchanger 15. One of the filters 20 a is disposed on the front side of the indoor heat exchanger 15, and the other of the filters 20 b is disposed on the upper side of the indoor heat exchanger 15.

The front panel 21 is a panel provided so as to cover the filter 20a on the front side, and the lower end is a shaft that can be rotated along the front side. In addition, the front panel 21 may not be rotated.

The left and right wind direction plates 22 are plate-like members that adjust the wind direction of the air in the left and right directions as the indoor fan 16 is driven. The left and right wind direction plates 22 are arranged in the blowout air path h3, and can be rotated in the left and right directions through the left and right wind direction plate motors 25 (see FIG. 7).

The up-and-down wind direction plate 23 is a plate-shaped member that adjusts the up-and-down air direction of the air blown out by the driving of the indoor fan 16. The up-and-down wind direction board 23 is arrange | positioned at the air blow-out port h4, and can be rotated in the up-down direction by the up-and-down wind direction board motor 26 (refer FIG. 7).

The air sucked in through the air suction ports h1 and h2 performs heat exchange with the refrigerant flowing through the heat transfer tube g of the indoor heat exchanger 15, and the heat-exchanged air is introduced into the blow-out air path h3. The air flowing through the blowing air path h3 is guided in a predetermined direction through the left and right wind direction plates 22 and the up and down wind direction plates 23, and is further blown out to the room through the air blowing outlet h4.

Most of the dust passing through the air suction ports h1 and h2 is collected by the filters 20a and 20b. However, since fine dust may be attached to the indoor fan 16 through the filters 20 a and 20 b, it is preferable to periodically clean the indoor fan 16. Therefore, in this embodiment, the indoor fan 16 is cleaned by the fan cleaning unit 24 described below.

The fan cleaning unit 24 shown in FIG. 2 is a person who cleans the indoor fan 16 and is disposed between the indoor heat exchanger 15 and the indoor fan 16.

FIG. 3 is a perspective view cut away from a part of the indoor unit Ui. The fan cleaning unit 24 includes a fan cleaning motor 24c (a second motor, see FIG. 4) in addition to the shaft portion 24a or the brush 24b shown in FIG.

The shaft portion 24 a is a rod-shaped member parallel to the axial direction of the indoor fan 16, and both ends thereof are supported by a shaft. The squeegee brush 24b is provided on the shaft portion 24a for scraping off dust adhering to the fan blade 16a. The fan cleaning motor 24c (see FIG. 4) is a driving source for rotating (moving) the shaft portion 24a and the brush 24b. As such a fan cleaning motor 24c, a stepping motor can be used, for example. Stepping motors have the feature that they can be positioned accurately with a specified rotation angle.

When the indoor fan 16 is cleaned, after the indoor fan 16 is reversely rotated, the shaft portion 24a is rotated so that the brush 24b contacts the indoor fan 16 (see FIG. 8). After the cleaning of the indoor fan 16 is completed, the shaft portion 24a is rotated again, and the brush 24b is separated from the indoor fan 16 (see FIG. 2). When cleaning the indoor fan 16, the indoor fan 16 may be rotated in the reverse direction after the shaft portion 24a is rotated.

FIG. 4 is an explanatory diagram of a fan cleaning unit 24 provided in the air conditioner. The fan cleaning unit 24 includes gears 24d, 24e, 24f (second gears), fixing portions 24g, 24h, and contact portions 24i, 24j in addition to the shaft portion 24a or brush 24b and the fan cleaning motor 24c. (2nd positioning element).

The gears 24d, 24e, and 24f transmit torque of the fan cleaning motor 24c to the shaft portion 24a at a predetermined gear ratio (reduction ratio). The gear 24d is connected to a rotor (not shown) of the fan cleaning motor 24c. The gear 24f is provided on one end side (the left side of the paper surface in FIG. 4) of the shaft portion 24a. The gear 24e meshes with the above-mentioned gears 24d and 24f.

In the example shown in FIG. 4, the “second drive portion” that rotates the shaft portion 24 a and the brush 24 b is configured to include a fan cleaning motor 24 c; and a torque of the fan cleaning motor 24 c is transmitted to the shaft cleaning portion 24 a. Gears 24d, 24e, 24f.

The pair of fixing portions 24g and 24h are those for fixing the gears 24d, 24e, and 24f, or fixing the fan cleaning motor 24c or the contact portion 24i. The contact portion 24i is an element for positioning the fan cleaning motor 24c, and is fixed to a predetermined portion of the fixing portion 24g. The other contact portion 24j is also a component for positioning the fan cleaning motor 24c, and is provided on one end side of the shaft portion 24a (the left side of the paper surface in FIG. 4).

For example, at the start of the air-conditioning operation, the fan cleaning motor 24c is driven, the contact portion 24j rotates integrally with the shaft portion 24a, and contacts the other contact portion 24i.

In addition, since the fan cleaning motor 24c (for example, a stepping motor) is driven according to the open-loop control, the rotation angle cannot be grasped by the control unit 30 (see FIG. 7). Therefore, for example, when the air-conditioning operation is started, in order to touch the contact portions 24i and 24j, the control unit 30 outputs a sufficient driving pulse to the fan cleaning motor 24c. After the touch is performed, the control unit 30 outputs a predetermined driving pulse to the fan cleaning motor 24c so that the brush 24b is positioned at a predetermined rotation angle. Further, the brush 24b is also maintained at a predetermined rotation angle by a coercive force due to the energization of the fan cleaning motor 24c.

The timing of contacting the contact portions 24i and 24j is not limited to the start of the air-conditioning operation. For example, the touch may be performed at the beginning or end of the cleaning of the indoor fan 16.

FIG. 5 is an explanatory diagram including the up-and-down wind direction board 23, the up-and-down wind direction board motor 26, and gears 28a and 28b included in the air conditioner.上下 The motor 26 (first motor) for the up-and-down wind direction plate shown in FIG. 5 is a motor that rotates the up-and-down wind direction plate 23. As such an up-and-down wind direction board motor 26, a stepping motor can be used, for example.

The gears 28 a and 28 b (first gears) transmit torque of the motor 26 for the up-and-down wind direction plate to the rotating shaft 23 a of the up-and-down wind direction plate 23 at a predetermined gear ratio (reduction ratio). One gear 28a is connected to a rotor (not shown) of the motor 26 for the up-and-down wind direction board. The other gear 28b is provided on one end side of the rotation shaft 23a (the left side of the paper surface in FIG. 5). The gears 28a and 28b are meshed with each other.

In the example shown in FIG. 5, the “first drive unit” that rotates the up-and-down wind direction plate 23 is configured to include: a up-and-down wind direction plate motor 26; and transmits the torque of the up-and-down wind direction plate motor 26 to the up-and-down wind direction plate. 23 gears 28a, 28b.一 对 The pair of fixing portions 29a and 29b shown in FIG. 5 are those in which the gears 28a and 28b are pivotally supported or the up-and-down wind board motor 26 is fixed.

FIG. 6 is an explanatory diagram near the air blowing outlet h4 of the indoor unit Ui. In addition, the illustration is simplified in FIG. 6. Among the front and rear upper and lower wind direction boards 23 and 23 (see FIG. 2), only the front upper and lower wind direction boards 23 are shown. In addition, in FIG. 6, the rotating shaft 23a or the contact parts 51a and 51b (1st positioning element) which are not shown in FIG. 2 are also shown.

The indoor unit Ui includes, in addition to the above-mentioned configurations, touch portions 51 a and 51 b shown in FIG. 6. The contact portion 51a is an element used for positioning the motor 26 (see FIG. 5) for the up-and-down wind direction board, and is fixed to a predetermined position of the indoor unit Ui. The other contact portion 51b is used for the positioning of the up-and-down wind direction board motor 26 (refer to FIG. 5). In the example shown in FIG. 6, the end portion of the up-and-down wind direction plate 23 (the side that touches the contact portion 51a) Ends). In addition, the contact portion 51b may be provided as a different element from the upper and lower wind directing plates 23.

For example, at the start of the air-conditioning operation, the up-and-down wind direction board motor 26 (see FIG. 5) is driven, and the contact portion 51b located at the end of the up-and-down wind direction plate 23 is rotated around the rotation shaft 23a. The other contact portion 51a is touched. Accordingly, the up-and-down wind direction plate 23 is appropriately and accurately rotated by the up-and-down wind direction plate motor 26 (for example, a stepping motor).

FIG. 7 is a functional block diagram of the air conditioner 100.室内 The indoor unit Ui shown in FIG. 7 includes a remote control transmitting / receiving unit 27 and an indoor control circuit 31 in addition to the above-mentioned configuration. The remote control transmitting / receiving unit 27 processes predetermined information with the remote control 40.

Although not shown, the indoor control circuit 31 is configured as an electronic circuit including a CPU (Central Processing Unit), a ROM (Read OnLy Memory), a RAM (Random Access Memory), and various interfaces. The stored program is read from the ROM and expanded in the RAM, and the CPU executes various processes.

As shown in FIG. 7, the indoor control circuit 31 includes a memory section 31 a and an indoor control section 31 b. In the memory section 31a, in addition to the prescribed program, it also stores data received through the remote transmission / reception section 27, or detection values of various sensors (not shown).

The indoor control unit 31b controls the indoor fan motor 16c, the fan cleaning motor 24c, the left and right wind direction board motor 25, and the up and down wind direction board motor 26 based on the data stored in the memory unit 31a.

The outdoor unit Uo includes an outdoor control circuit 32 in addition to the above-mentioned configuration. Although not shown, the outdoor control circuit 32 is configured as an electronic circuit including a CPU, ROM, RAM, and various interfaces, and is connected to the indoor control circuit 31 through a communication line. As shown in FIG. 7, the outdoor control circuit 32 includes a memory section 32 a and an outdoor control section 32 b.

In the memory unit 32a, in addition to a predetermined program, data and the like received from the indoor control circuit 31 are stored. The outdoor control unit 32b controls the compressor motor 11a, the outdoor fan motor 13a, the expansion valve 14, and the like based on the data stored in the storage unit 32a. The indoor control circuit 31 and the outdoor control circuit 32 are collectively referred to as a "control unit 30".

FIG. 8 is an explanatory diagram of a state during cleaning of the indoor fan 16. In addition, the illustration of the contact portions 24i, 24j and the like (see FIG. 4) is omitted in FIG. 8.时 When cleaning the indoor fan 16, the control unit 30 (refer to FIG. 7) rotates the indoor fan 16 in a direction opposite to that during normal air-conditioning operation. In addition, the control unit 30 rotates the brush 24b about the shaft portion 24a, and causes the brush 24b to contact the indoor fan 16.

When the indoor fan 16 is reversely rotated in this way, the brush 24b is bent in accordance with the movement of the fan blade 16a, and the brush 24b is pressed so as to gently brush the back surface of the fan blade 16a. The dust j adhering to the fan blade 16a is scraped off by the brush 24b.

As shown in FIG. 8, the dust j scraped off from the indoor fan 16 is introduced into the water pan 18 through a gap between the indoor heat exchanger 15 and the indoor fan 16. Accordingly, the indoor fan 16 can be kept in a clean state. In addition, dust j can be prevented from being blown into the room during the next air-conditioning operation.

When the cleaning of the indoor fan 16 is completed, the control unit 30 (see FIG. 7) outputs a predetermined driving pulse to the fan cleaning motor 24 c (see FIG. 4), and accordingly, the fan cleaning unit 24 retracts from the indoor fan 16. In the retracted state of the fan cleaning unit 24, for example, the front end of the brush 24b is in a state facing the indoor heat exchanger 15 (see FIG. 2). Accordingly, even if the indoor fan 16 rotates at a high speed during the subsequent air-conditioning operation, since the brush 24b does not contact the fan blade 16a, noise can be suppressed, and damage to the fan blade 16a can be prevented. Hereinafter, the relationship between the up-and-down wind direction plate 23 and the fan cleaning unit 24 will be described (refer to FIGS. 4 and 5 as appropriate).

The up-and-down wind direction board 23 is a thin plate-like resin member with a smooth surface, and hardly attaches water droplets or dust on the surface. Therefore, in most cases, the torque required for the rotation of the up-and-down wind direction plate 23 is almost the same as that when the air conditioner 100 (see FIG. 1) is installed.

On the other hand, as shown in FIG. 4, the fan cleaning unit 24 includes a shaft portion 24 a or a brush 24 b. Therefore, based on the temperature and humidity inside the indoor unit Ui (see FIG. 2), there is a possibility that water or dust may be trapped between the hairs of the brush 24 b, or moisture may adhere to the shaft portion 24 a due to condensation. In addition, since the shaft portion 24a is made of metal, thermal expansion or thermal contraction causes a change in the length in the axial direction due to a temperature change inside the indoor unit Ui. For example, the shaft portion 24a thermally expands at a high temperature, and its length becomes slightly longer. Along with this, the gear 24f is pressed in the axial direction, so the resistance when the gear 24f is rotated is greater than when the gear 24f is rotated at a low temperature.

The up-and-down wind direction board 23 and the fan cleaning part 24 have the same thing in the point which extends in parallel with the axial direction of the indoor fan 16 (refer FIG. 2), or the point where air circulates in the vicinity. However, due to differences in the structure or constituent materials of the up-and-down wind direction plate 23 and the fan cleaning unit 24, the required torque for rotation causes the fan-cleaning unit 24 to change more easily than the up-and-down wind direction plate 23.

Here, in this embodiment, the torque margin of the "second drive unit" (fan cleaning motor 24c and gears 24d, 24e, 24f: see FIG. 4) is set to be larger than the "first drive unit" ( Torque allowance for the motor 26 and the gears 28a, 28b for the up-and-down wind direction board (refer to FIG. 5).

In addition, the margin of the torque of the "first drive unit" that rotates the up-and-down wind direction plate 23 indicates that the maximum torque with respect to the "first drive unit" is actually generated in the initial state where the air conditioner 100 is installed. The degree of torque margin. The specific explanation is as follows. The torque margin of the "first drive unit" refers to the maximum torque that can be output by the "first drive unit" divided by the "first drive unit" in the initial state where the air conditioner 100 is installed. ”To the actual torque.

Similarly, the margin of the torque of the "second drive unit" that rotates the shaft portion 24a and the brush 24b refers to the maximum output of the "second drive unit" in the initial state where the air conditioner 100 is installed. The value obtained by dividing the torque by the actual torque of the “second drive unit” in the initial state where the air conditioner 100 is installed.

In the present embodiment, as described above, the torque margin of the "second driving portion" is greater than the torque margin of the "first driving portion". Therefore, even if moisture or dust adheres to the brush 24b, thermal expansion of the shaft portion 24a is caused by a temperature change, or deformation of the brush 24b causes a large change in torque required for the rotation of the shaft portion 24a or the brush 24b, the "2nd The "driving unit" may appropriately rotate the shaft portion 24a and the brush 24b. Accordingly, the indoor fan 16 can be appropriately cleaned by the fan cleaning unit 24 without being affected by the adhesion of dust and the like.

In addition, as the brush 24b and the up-and-down wind direction plate 23 are closer to the horizontal direction, the more they are affected by gravity, the larger the torque required for rotation becomes. Therefore, it is preferable to set the margin of the torque of the "second drive part" when the brush 24b is turned upward from the angle closest to the horizontal direction among the rotation range of the brush 24b in the horizontal direction or greater than the horizontal direction or Of the angles closest to the horizontal direction among the rotation range of the up-and-down wind direction plate 23, the margin of the torque of the "first drive part" when the up-and-down wind direction plate 23 is turned upward. According to this, it is possible to sufficiently secure the margin of the torque even in a situation where the load for the fan cleaning motor 24c is easily applied.

In addition, even in a state where the brush 24b contacts the indoor heat exchanger 15 (a state where the hair of the brush 24b enters the gap between the fins f), the torque required for the rotation of the shaft portion 24a or the brush 24b becomes large. Therefore, it is preferable to set the margin of the torque of the "second drive part" when the brush 24b is rotated while the brush 24b is in contact with the indoor heat exchanger 15, and set to be larger than the rotation range of the horizontal or vertical wind direction plate 23 Of the angles closest to the horizontal direction, the margin of the torque of the "first drive unit" when the up-and-down wind direction plate 23 is turned upward. According to this, it is possible to sufficiently secure the margin of the torque even in a situation where the load for the fan cleaning motor 24c is easily applied.

In addition, the margin of the torque of the "second drive portion" when the contact portions 24i and 24j of the fan cleaning portion 24 are in contact with each other may be set to be larger than the contact portions 51a and 51b of the up-and-down wind direction plate 23 in contact with each other. Torque margin of the "1st drive unit" at that time. According to this, it is possible to sufficiently secure the margin of the torque even in a situation where the load for the fan cleaning motor 24c is easily applied.

Furthermore, in a configuration in which a plurality of "first drive units" are provided corresponding to a plurality of upper and lower wind direction plates 23, it is preferable to set a margin of torque of the "second drive unit" to a plurality of "first drive units" The “torque part” has the largest torque margin. For example, among the six “first drive units” (upper and lower wind direction plate motors 26 and the like) corresponding to the six upper and lower wind direction plates 23 one by one, the torque margin of a predetermined one is the largest. The margin of the torque of the "second drive part" (fan cleaning motor 24c, etc.) is made larger than one of the regulations.

This makes it possible to sufficiently secure the torque margin of the "second drive unit". That is, when the torque required for the rotation of the shaft portion 24a and the brush 24b changes with the thermal expansion of moisture or dust attached to the brush 24b or the shaft portion 24a, the margin of torque is relatively large. The "driving unit" can also smoothly respond to the above changes. Therefore, the shaft portion 24a and the brush 24b can be appropriately rotated without being affected by a temperature change or adhesion of dust.

It is preferable that the motor 26 for the up-and-down wind direction board and the motor 24c for fan cleaning are the same type of motor. According to this, for example, it is possible to use the relatively low-priced up-and-down wind board motor 26 as a stepping motor of the same type and use it as the fan cleaning motor 24c. Therefore, the manufacturing cost of the air conditioner 100 can be reduced.

The second speed transmission ratio α2 related to the gears 24d, 24e, and 24f of the fan cleaning unit 24 is preferably passed through the first speed transmission ratio α1 (α2> α1) related to the gears 28a and 28b of the up-and-down wind direction plate 23. ). The “first speed transmission ratio α1” refers to the number of teeth of the gear 28 b connected to the rotating shaft 23 a of the up-and-down wind direction plate 23 (see FIG. 5), divided by the rotor (not shown) connected to the up-and-down wind direction plate motor 26 ) Is the value obtained by the number of teeth of the other gear 28a connected.

The "second speed transmission ratio α2" refers to the number of teeth of the gear 24f connected to the shaft portion 24a of the fan cleaning unit 24 (see Fig. 4) divided by the rotor (not shown) connected to the fan cleaning motor 24c. ) The value obtained by the number of teeth of the other gear 24d connected. For example, when the motor 26 for up and down wind direction and the motor 24c for fan cleaning are the same type of stepping motor, based on the magnitude relationship of each speed transmission ratio (α2> α1), it can be larger than that of the up and down wind direction 23 The torque causes the fan cleaning unit 24 to rotate. Therefore, even when moisture or dust adheres to the brush 24b, or when the shaft portion 24a is thermally expanded in accordance with a temperature change, the fan cleaning portion 24 can be appropriately rotated.

Moreover, it is preferable that the motor 26 for the up-and-down wind direction board and the motor 24c for fan cleaning are the same type of motor, and the second speed transmission ratio of the "second drive unit" is different from the first speed of the "first drive unit" Transmission ratio. According to this, the same type of motor can be used for the up-and-down wind board motor 26 and the fan cleaning motor 24c, and the torque margin of the "second drive part" can be appropriately adjusted at the design stage.

The number of gears 24d, 24e, and 24f of the fan cleaning unit 24 (three in this embodiment) is preferably more than the number of gears 28a and 28b of each upper and lower wind direction plate 23 (in this embodiment: 2). Accordingly, in the configuration in which the magnitude relationship (α2> α1) of each of the speed transmission ratios described above is established, the gear ratio (ratio of the number of teeth) of the gears of each pair of teeth that mesh with each other can be made small. In addition, the magnitude of the torque of the "first driving section" or the "second driving section" can be appropriately adjusted according to the number of each gear and the number of teeth.

FIG. 9 is an explanatory view showing a state where the contact portions 24i and 24j of the fan cleaning portion 24 are in contact with each other. In addition, the dotted line in FIG. 9B shows a state where the brush 24b is in contact with the fan blade 16a. Preferably, the contact portion 24i on the fixed side of the positioning of the fan cleaning motor 24c is more stable than the contact portion 51a (see FIG. 6) on the fixed side of the positioning of the up and down wind motor 26 (see FIG. 6). The thickness of the contact direction (see the white arrow M in FIG. 6 and the white arrow N in FIG. 9) is relatively thick.

Similarly, it is preferable that the moving-side contact portion 24j of the positioning of the fan cleaning motor 24c is positioned better than the moving-side contact portion 51b (see FIG. 6) of the positioning of the up-and-down windboard motor 26. The thickness of the contact direction (see white arrow M in FIG. 6 and white arrow N in FIG. 9) is thicker.

As described above, the fan cleaning unit 24 is configured to be able to rotate with a larger torque than the up-and-down wind direction plate 23. Therefore, for example, in many cases, the force acting from one direction of the contact portions 24i and 24j of the fan cleaning portion 24 becomes larger than the force acting from the direction of the contact portions 51a and 51b when the up-and-down wind direction plate 23 rotates. force.

For example, the thickness of the contact portions 24i and 24j may be set to 3 mm, and the thickness of the contact portions 51a and 51b may be set to 2 mm. Accordingly, the strength of the contact portions 24i and 24j is higher than the strength of the contact portions 51a and 51b. Therefore, the damage of the contact portions 24i and 24j can be suppressed. The thicknesses of the contact portions 24i, 24j, 51a, and 51b are not limited to the above-mentioned values.

In addition, the contact portions 24i and 24j for positioning the fan cleaning motor 24c are made of a high-strength material rather than the contact portions 51a and 51b (see FIG. 6) for positioning the motor 26 for the up-and-down wind direction plate. it is good. For example, the material constituting the contact portions 24i and 24j may be an ABS resin (copolymerized resin of acrylonitrile, butadiene, and styrene). On the other hand, the material constituting the contact portions 51a and 51b may be PS resin (polystyrene). According to this, the strength of the contact portions 24i and 24j is higher than the strength of the high contact portions 51a and 51b, and therefore, it is not easily broken. The above-mentioned ABS resin or PS resin is only an example, and is not intended to be limiting.

<Effects> According to the present embodiment, the torque margin of the "second drive unit" including the fan cleaning motor 24c is larger than the torque margin of the "first drive unit" including the vertical wind board motor 26. Accordingly, even when the torque required for the rotation of the shaft portion 24a and the brush 24b is large, they can be appropriately rotated. Therefore, it is possible to provide a highly reliable air conditioner 100 in consideration of the durability of the fan cleaning unit 24.

In addition, the second speed transmission ratio α2 of the gears 24d, 24e, and 24f (see FIG. 4) used for the rotation of the shaft portion 24a and the brush 24b is larger than that of the gears 28a, 28b (see FIG. 5) used for the rotation of the upper and lower wind direction plates 23. First speed transmission ratio α1. According to this, for example, when the same type of motor is used for the fan cleaning motor 24c and the up-and-down wind direction board motor 26, the fan cleaning part 24 can be rotated with a large torque.

≪Modifications Above, the air conditioner 100 of the present invention is described based on the embodiments, but the present invention is not limited to those described, and various changes can be made. For example, as described in the embodiment, the thickness of the contact portions 24i and 24j (refer to FIG. 9) of the fan cleaning portion 24 is thicker than the thickness of the contact portions 51a and 51b (refer to FIG. 6) for turning the upper and lower wind direction plates 23. A thicker structure is not limited to this. An example will be described below using FIG. 10.

FIG. 10 is an explanatory diagram showing a state where the contact portions 24Ai and 24j of the fan cleaning portion 24A are in contact with each other in the air conditioner of the modification. In the example shown in FIG. 10, the contact portion 24Ai on the fixed side of the fan cleaning portion 24A includes a reinforcing rib portion A1. In such a configuration, it is preferable that the contact portion 51a (refer to FIG. 6) used for positioning of the up-and-down wind direction board motor 26 does not have a rib on the opposite side of the contact surface itself during positioning. On the other hand, the fan The contact portion 24Ai used for the positioning of the cleaning motor 24c has a rib A1 on the side opposite to the contact surface itself during positioning. According to this, even when the fan cleaning portion 24A rotates with a larger torque than the up-and-down wind direction plate 23, the contact portion 24Ai of the fan cleaning portion 24A is not easily broken, and thus the life can be extended.

In the embodiment, the operation (such as cleaning of the indoor fan 16) performed after the installation of the air conditioner 100 is described, but it is not limited to this. For example, the fan cleaning motor 24c may have a "test mode" in which it is driven at a higher rotation speed than in the normal cleaning of the indoor fan 16. According to this, the torque for rotating the shaft portion 24a and the brush 24b in the "test mode" is smaller than that during normal cleaning. Therefore, it is easy to find that the shaft portion 24a and the brush 24b have failed during the inspection stage before the air conditioner 100 leaves the factory. Defective goods that rotate properly. In addition, by setting the "test mode" described above, when testing whether the fan cleaning unit 24 is operating normally, the time required for the rotation of the shaft portion 24a and the brush 24b can be shortened. Therefore, the time required for the inspection of the air conditioner 100 before shipment can be shortened, and the production efficiency of the air conditioner 100 can be improved.

In the embodiment, the configuration in which the brush 24b is rotated around the shaft portion 24a as the center of the fan cleaning portion 24 is described, but the configuration is not limited to this. For example, a configuration in which the fan cleaning unit 24 is moved in parallel may be used. In addition, although the structure in which the fan cleaning part 24 was provided with the brush 24b was demonstrated in embodiment, it is not limited to this. That is, as long as it is a member which can clean the indoor fan 16, a sponge etc. can be used instead of the brush 24b.

In the embodiment, an example is described in which the fan cleaning unit 24 is arranged on the upstream side of the indoor fan 16 in the air flow direction, but it is not limited to this. For example, the fan cleaning unit 24 may be disposed on the downstream side of the indoor fan 16. In the embodiment, the case where the same type of motor is used for the up-and-down wind board motor 26 and the fan cleaning motor 24c will be described, but they may be different types of motors.

In the embodiment, a configuration in which a motor 26 for an up-and-down wind direction plate is provided near one end of the rotation shaft 23a (see FIG. 5) of the up-and-down wind direction plate 23 is described, but the invention is not limited thereto. For example, motors for the up-and-down wind direction board 26 may be provided in the vicinity of both ends of the rotating shaft 23a of the up-and-down wind direction board 23, respectively. The same applies to the fan cleaning unit 24. In such a configuration, the margin of the torque of the "second drive portion" is calculated based on the sum of the torques provided near both ends of the shaft portion 24a. In addition, it is preferable to drive a single up-and-down wind direction plate 23 through a plurality of "first drive portions", and a torque margin of the "second drive portion" is larger than a plurality of "first drives" that drive one up-and-down wind direction plate 23 The total allowances for each torque of the engine. This makes it possible to sufficiently secure the torque margin of the "second drive portion", and to appropriately rotate the shaft portion 24a or the brush 24b.

In the embodiment, it is explained that two gears 28a and 28b are provided for the rotation of the up-and-down wind direction plate 23 (refer to FIG. 5). On the other hand, three gears 24d and 24e are provided for the rotation of the shaft portion 24a and the brush 24b. And 24f (see FIG. 4), but are not limited thereto. That is, the number of gears can be changed as appropriate. For example, the number of gears for rotating the up-and-down wind direction plate 23 may be more than the number of gears for rotating the shaft portion 24a and the brush 24b.

In the embodiment, an example in which the indoor fan 16 is rotated in the reverse direction during cleaning of the indoor fan 16 is described, but the invention is not limited to this. That is, the indoor fan 16 may be rotated forward during cleaning of the indoor fan 16. In addition, in the embodiment, a case where the second speed transmission ratio α2 of the “second driving section” is larger than the first speed transmission ratio α1 of the “first driving section” (α2> α1) is not limited thereto. For example, the second speed transmission ratio α2 may be equal to or smaller than the first speed transmission ratio α1 (α2 ≦ α1).

In the embodiment, a configuration is described in which one indoor unit Ui (see FIG. 1) and one outdoor unit Uo (see the same figure) are provided, but it is not limited to this. That is, a plurality of indoor units connected in parallel may be provided, and a plurality of outdoor units connected in parallel may be provided. In addition, the structure of the embodiment can be applied to various types of air conditioners in addition to room air conditioning.

It should be noted that the description of the embodiments has been described in detail for easy understanding of the present invention, and is not necessarily limited to those having all the descriptions. In addition, for a part of the configuration of the embodiment, it is possible to add and delete other configurations. In addition, the above-mentioned mechanism or structure is shown as necessary in the description, and the product is not necessarily limited to the entire mechanism or structure.

100‧‧‧ Air Conditioner

11‧‧‧compressor

12‧‧‧ outdoor heat exchanger

13‧‧‧outdoor fan

14‧‧‧Expansion valve

15‧‧‧ indoor heat exchanger (heat exchanger)

16‧‧‧ indoor fan (fan)

17‧‧‧square valve

22‧‧‧left and right wind board

23‧‧‧Up and down wind direction board

23a‧‧‧Rotating shaft

24, 24A‧‧‧Fan cleaning department

24a‧‧‧Shaft

24b‧‧‧brush

24c‧‧‧fan cleaning motor (second drive unit, second motor)

24d, 24e, 24f ‧‧‧ gear (2nd drive unit, 2nd gear)

24g, 24h‧‧‧Fixed part

24i, 24Ai, 24j‧‧‧touching part (2nd positioning element)

25‧‧‧ Left and right wind direction board motor

26‧‧‧Motor for up and down wind direction board (1st drive unit, 1st motor)

28a, 28b‧‧‧ gear (1st drive unit, 1st gear)

30‧‧‧Control Department

51a, 51b‧‧‧touching part (1st positioning element)

A1‧‧‧ tendon

Q‧‧‧Refrigerant circuit

[FIG. 1] A configuration diagram of a refrigerant circuit of an air conditioner according to an embodiment of the present invention. [FIG. 2] A longitudinal sectional view of an indoor unit provided in the air conditioner according to the embodiment of the present invention. [FIG. 3] A perspective view in which a part of an indoor unit provided in the air conditioner according to the embodiment of the present invention is cut away. [FIG. 4] An explanatory diagram of a fan cleaning unit provided in the air conditioner according to the embodiment of the present invention. [FIG. 5] An explanatory diagram of an air conditioner according to an embodiment of the present invention, including a vertical wind direction plate, a motor for a vertical wind direction plate, and a gear. [FIG. 6] An explanatory view near the air outlet of the indoor unit provided in the air conditioner according to the embodiment of the present invention. [FIG. 7] A functional block diagram of the air conditioner according to the embodiment of the present invention. [FIG. 8] An explanatory diagram showing a state during cleaning of an indoor fan of the air conditioner according to the embodiment of the present invention. [FIG. 9] An explanatory diagram showing a state where the contact portions of the fan cleaning portion are in contact with each other in the air conditioner according to the embodiment of the present invention. [FIG. 10] An explanatory view showing a state where the contact portions of the fan cleaning portion are in contact with each other in the air conditioner according to the modification of the present invention.

Claims (11)

An air conditioner includes: a heat exchanger; a fan; a fan cleaning section to clean the fan; an up-and-down wind direction plate to adjust a wind direction of the air blowing up and down along with the driving of the fan; and a first driving section To rotate the up-and-down wind direction plate; the fan cleaning unit includes: an axis portion parallel to the axial direction of the fan; a brush provided on the axis portion; and a second driving portion which rotates the axis portion and the brush; the first 2 The torque margin of the driving unit is larger than the torque margin of the first driving unit. For example, in the air conditioner of the scope of application for the patent, the margin of the torque of the second driving part when the brush is turned upward in the horizontal direction or the angle closest to the horizontal direction in the rotation range of the brush, It is greater than the margin of the torque of the first driving portion when the up-and-down wind direction plate is turned upward in the horizontal direction or the angle closest to the horizontal direction among the rotation range of the up-and-down wind direction plate. For example, in the air conditioner applying for the first item of the patent scope, the torque margin of the second driving part when the brush is rotated while the brush is in contact with the heat exchanger is greater than that in the horizontal direction or the up-and-down wind direction plate Of the angles closest to the horizontal direction among the rotation ranges, the margin of the torque of the first driving section when the up-and-down wind direction plate is turned upward. For example, the air conditioner of the first scope of the patent application, in which a plurality of the first driving sections are provided corresponding to a plurality of the up-and-down wind direction plates, and the margin of the torque of the second driving section is larger than the plurality of the first driving sections. The largest torque margin in the part is greater. For example, the air conditioner of the first scope of the patent application, wherein one of the above-mentioned up-and-down wind direction boards are driven by a plurality of the above-mentioned first driving parts, and the margin of the torque of the above-mentioned second driving part is greater than that for one of the above-mentioned up-down wind directions The total of the margins of the respective torques of the plurality of first drive units that are driven by the plate. For example, the air conditioner of the first scope of the patent application, wherein the first drive unit has: a first motor; and a plurality of first gears, which transmits the torque of the first motor to the up-and-down wind direction plate; The second drive unit has : The second motor; and a plurality of second gears that transmit the torque of the second motor to the shaft portion; regarding the speed transmission ratio, the second speed transmission ratio of the second driving portion is larger than that of the first driving portion; The first speed transmission ratio, The first speed transmission ratio is the number of teeth of the first gear connected to the rotating shaft of the up-and-down wind direction plate, divided by the other first gear connected to the rotor of the first motor. The value obtained by the number of teeth, The second speed transmission ratio is the number of teeth of the second gear connected to the shaft portion of the fan cleaning portion, divided by another of the second gear connected to the rotor of the second motor. The value is obtained by the number of teeth of 2 gears. For example, the air conditioner for item 6 of the scope of patent application, wherein the number of the above-mentioned second gears is more than the number of the above-mentioned first gears of each of the above-mentioned up-and-down wind direction plates. For example, the air conditioner of the first scope of the patent application, wherein the first drive unit has: a first motor; and a plurality of first gears, which transmits the torque of the first motor to the up-and-down wind direction plate; The second drive unit has : The second motor; and a plurality of second gears that transmit the torque of the second motor to the shaft portion; the first motor and the second motor are stepping motors respectively, and is provided with: 的 the positioning of the first motor The first positioning element; and the second positioning element for the positioning of the second motor; 上述 Compared to the first positioning element, the second positioning element is thicker in the contact direction when positioning, or The second positioning element is made of a material having a higher strength than the first positioning element. For example, the air conditioner of the first scope of the patent application, wherein the first drive unit has: a first motor; and a plurality of first gears, which transmits the torque of the first motor to the up-and-down wind direction plate; The second drive unit has : The second motor; and a plurality of second gears that transmit the torque of the second motor to the shaft portion; the first motor and the second motor are stepping motors respectively; is equipped with: 的 the positioning of the first motor The first positioning element; and the second positioning element for the positioning of the second motor; The first positioning element does not have a rib on the opposite side of the contact surface during positioning; The second positioning element is in progress. When positioning, there is a rib on the opposite side of the contact surface. For example, the air conditioner of the first scope of the patent application, wherein the first drive unit has: a first motor; and a plurality of first gears, which transmits the torque of the first motor to the up-and-down wind direction plate; The second drive unit has : The second motor; and a plurality of second gears that transmit the torque of the second motor to the shaft portion; the first motor and the second motor are the same type of motor, and the second of the second driving portion The speed ratio is different from the first speed ratio of the first drive unit. The first speed ratio is the number of teeth of the first gear that is connected to the rotating shaft of the up-and-down wind direction plate, divided by the first motor. The value obtained by the number of teeth of the other first gear connected to the rotor, The second speed transmission ratio is the number of teeth of the second gear connected to the shaft portion of the fan cleaning unit, divided by the number of teeth The value obtained by the number of teeth of the second gear connected to the rotor of the two motors. For example, the air conditioner according to any one of claims 6 to 10, in which the above-mentioned second motor has a test mode in which it is driven at a higher rotation speed than in the normal cleaning of the fan.