WO2017042913A1

WO2017042913A1 - Indoor unit and air conditioner

Info

Publication number: WO2017042913A1
Application number: PCT/JP2015/075619
Authority: WO
Inventors: 辰夫古田; 瀧下　隆明; 尚也松永; 隆弘小松
Original assignee: 三菱電機株式会社
Priority date: 2015-09-09
Filing date: 2015-09-09
Publication date: 2017-03-16
Also published as: JPWO2017042913A1; CN206347709U; JP6641377B2

Abstract

This indoor unit is equipped with: wind-direction vanes which are driven rotatively about their respective vane shafts so as to change the direction of air blowing from blowout ports; vane driving devices which have rotary shafts and rotatively drive the wind-direction vanes; and drive range defining tools which are each disposed between the rotary shaft and the vane shaft and connected thereto, so as to define the range where the wind-direction vane can be rotatively driven. Thus, it is possible to increase the accuracy of detection of limits on the rotative drive ranges.

Description

Indoor unit and air conditioner

This invention relates to an indoor unit such as an air conditioner. In particular, it is related with the structure which concerns on the rotational drive of the wind direction vane arrange | positioned at the blower outlet.

For example, in an indoor unit such as an air conditioner, a wind direction plate that is a wind direction vane that changes the direction of the air blown from the air outlet is often installed at the air outlet. The wind direction vane has a plate portion serving as a wing for guiding the air blown out from the air outlet. Moreover, it has the axial part which is a vane axis | shaft used as a rotation center in the both ends of a board part. On the other hand, the bearing part corresponding to each axial part is attached to the main body side of the indoor unit. And the electric motor which is a vane drive device is arrange | positioned at the one side corresponding to the both ends of a wind direction vane. The vane drive device is a device that can rotationally drive the wind direction vane so that the plate portion has an arbitrary angle based on an instruction from a control device, for example (see, for example, Patent Document 1).

For example, in order to protect wind direction vanes, the range in which wind direction vanes can be rotationally driven is specified. In Patent Document 1 described above, the rotational drive range of the wind direction vane is defined by providing a projection and a projection receiving groove on the shaft portion and the bearing of the wind direction vane and restricting the movement range of the projection.

Japanese Patent Laid-Open No. 10-274432

One of the limits of the rotational drive range is a reference when the control device determines the angle of the wind direction vane, gives instructions to the vane drive device, and the like. For this reason, it is necessary to accurately detect the limit point of the rotational drive range. Here, for example, when the length (height) of the convex portion of the projection is longer, even when the rotational drive is performed at the same angle, the detection capability is improved by increasing the moving distance of the tip portion. It becomes higher and the standard can be determined more accurately.

However, in the indoor unit configured as in Patent Document 1, the convex length of the protrusion is shortened. For this reason, the precision of the control which rotationally drives a wind direction vane was low.

Also, for example, there is an indoor unit that transmits the rotation of the vane drive device to the wind direction vane via a gear between the wind direction vane and the vane drive device in order to rotationally drive the wind direction vane. Space is required to install the gear. For this reason, the convex length cannot be increased. Therefore, high dimensional accuracy is required for the manufacture of the gear, which causes an increase in cost.

The present invention has been made to solve the above-described problems. For example, an object of the present invention is to obtain an indoor unit having a structure capable of performing angle control related to rotational driving of a wind vane with high accuracy. To do.

An indoor unit according to the present invention includes a wind direction vane that rotates around a vane shaft and changes the direction of the air blown from the outlet, a vane drive device that rotates the wind direction vane, and a rotation shaft. And a drive range defining tool that is connected to the rotary shaft and the vane shaft and defines a range in which the wind direction vane can be rotationally driven.

The air conditioner according to the present invention includes the indoor unit and the outdoor unit described above and performs air conditioning.

According to the present invention, by providing the drive range defining tool having a structure in which the convex length is increased so as to be connected to the rotation shaft and the vane shaft between the rotation shaft and the vane shaft, It is possible to increase the detection accuracy of the limit of the rotational drive range, which is a reference for angle control related to rotational drive.

It is a perspective view which shows the installation state of the indoor unit 1 which concerns on Embodiment 1 of this invention. It is a perspective view of the state which removed the decorative panel corner part 8 of the indoor unit 1 which concerns on Embodiment 1 of this invention. It is a figure which shows the internal structure of the corner part of the indoor unit 1 which concerns on Embodiment 1 of this invention. It is a figure explaining the apparatus which concerns on the drive of the wind direction vane 4 which concerns on Embodiment 1 of this invention. It is a figure explaining the connection relation of the wind direction vane 4 and the coupling 12 which concern on Embodiment 1 of this invention. It is a figure which shows the state which attached the apparatus concerning a drive to the wind direction vane 4 of the indoor unit 1 which concerns on Embodiment 1 of this invention. It is a figure explaining the rotational drive regulation of the wind direction vane 4 by the coupling 12 in the indoor unit 1 which concerns on Embodiment 1 of this invention. It is a figure showing the structural example of the air conditioner which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
Hereinafter, an indoor unit according to an embodiment of the present invention will be described with reference to the drawings. In the following drawings, the same reference numerals denote the same or corresponding parts, and are common to the whole text of the embodiments described below. And the form of the component represented to the whole text of specification is an illustration to the last, Comprising: It does not limit to the form described in the specification. In particular, the combination of the components is not limited to the combination in each embodiment, and the components described in the other embodiments can be applied to another embodiment. In addition, the upper side in the figure will be described as “upper side” and the lower side will be described as “lower side”. Furthermore, when there is no need to distinguish or identify a plurality of similar devices that are distinguished by subscripts, the subscripts may be omitted. In the drawings, the relationship between the sizes of the constituent members may be different from the actual one.

FIG. 1 is a perspective view showing an installation state of an indoor unit 1 according to Embodiment 1 of the present invention. In the present embodiment, as a typical example of an indoor unit, a four-way cassette type indoor unit 1 having a ceiling-embedded type that can be embedded in a ceiling in a room and having outlets in four directions will be described. The indoor unit 1 is connected to an outdoor unit (not shown) through a refrigerant pipe, and constitutes a refrigerant circuit that circulates the refrigerant and performs refrigeration, air conditioning, and the like.

As shown in FIG. 1, the indoor unit 1 according to the present embodiment includes a box-shaped housing 2 having a top plate and a side plate and opening toward an indoor space (a space to be air-conditioned). Hanging brackets 5 are attached to the four corners of the housing 2. On the other hand, four suspension bolts 7 are suspended from the ceiling, and the indoor unit 1 is fixed and installed on the ceiling by fastening the suspension fitting 5 at an arbitrary position of the suspension bolt 7.

The housing 2 houses an indoor fan (not shown), an indoor unit heat exchanger for exchanging heat from the room air, and the like. Below the indoor unit 1, a decorative panel 3 having a substantially rectangular shape in plan view, which is a design surface (exterior surface) of the indoor unit 1, is attached to face the indoor space. In the vicinity of the center of the decorative panel 3, a suction grill 3 a serving as an air inlet into the indoor unit 1 is provided together with a dust removal filter. In addition, air outlets 3 b are formed along each side of the decorative panel 3 on each side of the decorative panel 3. Each air outlet 3b is provided with a wind direction vane 4 that is driven to rotate (rotate and move) around a vane shaft 4a serving as a rotation shaft.

FIG. 2 is a perspective view of the indoor unit 1 according to Embodiment 1 of the present invention with the decorative panel corner portion 8 removed. In FIG. 2, the figure which has the decorative panel corner part 8 in two corners (corner) is shown. The decorative panel corner portion 8 is formed of a separate member from the decorative panel 3. When installing the decorative panel corner 8, the wind direction vane 4 is attached and then fitted into the decorative panel 3.

FIG. 3 is a diagram showing an internal configuration of a corner portion of the indoor unit 1 according to Embodiment 1 of the present invention. The vane drive motor unit 9 is a vane drive device that is driven to rotate so that the wind direction vane 4 has an angle based on the instruction in accordance with an instruction from a control device (not shown). The indoor unit 1 of the present embodiment includes four vane drive motor units 9 so that each wind direction vane 4 can be driven to rotate independently. And in the indoor unit 1 of this Embodiment, two vane drive motor parts 9 are each provided in the two decorative panel corner parts 8a which are diagonal among the four decorative panel corner parts 8 of the indoor unit 1. Deploy. For example, each vane drive motor unit 9 is electrically connected to an electrical component box (not shown) having a control device that receives instructions and a power supply device (not shown) that receives power supply. By consolidating the vane drive motor section 9 at the two decorative panel corner sections 8a, the wiring can be made short and concise.

Here, the rotation directions of the two vane drive motor units 9 arranged in one decorative panel corner portion 8a are reversed. For this reason, the indoor unit 1 of the present embodiment uses two types of vane drive motor units 9. The vane shaft 4a on the side to which the vane drive motor unit 9 is attached is also different for the wind direction vane 4. For this reason, two types of wind direction vanes 4 are used.

FIG. 4 is a diagram for explaining equipment related to driving of the wind direction vane 4 according to Embodiment 1 of the present invention. As shown in FIG. 4, the vane drive motor unit 9 is held by being screwed to the motor holding metal plate 10 by screws 9b. On the other hand, the motor holding sheet metal 10 is attached to the decorative panel 3. The motor holding metal plate 10 has a closing degree stopper 10b in which a mounting hole to the decorative panel 3 is formed. The closing degree side stopper 10b regulates the limit closing degree that the wind direction vane 4 is rotationally driven in the direction of closing the outlet 3b by regulating the rotation of the coupling 12 described later. Further, as shown in FIG. 5 and the like which will be described later, an opening-side stopper 10a for regulating an angle range in which the wind direction vane 4 can be rotationally driven is provided. The opening side stopper 10a regulates the limit opening degree that the wind direction vane 4 rotationally drives in the direction of opening the outlet 3b by regulating the rotation of the coupling 12 described later. In the indoor unit 1 of the present embodiment, the position of the wind direction vane 4 when regulated by the opening-side stopper 10a serves as a reference for controlling the angle of the wind direction vane 4. In the present embodiment, the closing side stopper 10b is provided, but it may not be necessary in some cases. The bush 11 serving as a bearing has a through hole that supports the inserted vane shaft 4a. And the bush 11 is attached to the decorative panel 3, and supports the wind direction vane 4 so that rotation drive is possible.

The coupling 12 is attached, for example, as a locking member so that the vane shaft 4a does not come off the bush 11 and the wind direction vane 4 does not fall from the indoor unit 1. Therefore, the vane shaft 4 a is attached after passing through the bush 11. Moreover, in this Embodiment, it becomes a coupling member for connecting the vane shaft 4a of the wind direction vane 4 and the rotating shaft 9a of the vane drive motor unit 9 so that the rotation centers are the same. And the coupling 12 of this Embodiment becomes a drive range prescription | regulation tool which has the coupling convex part 12a, and determines the range which the wind direction vane 4 can rotationally drive by the rotation of a convex part being controlled. . The coupling 12 having the coupling convex portion 12a is not provided in the form of a bearing or a vane shaft, but is provided independently, so that the convex shape can be made longer and the detection accuracy of the opening limit is increased. can do. The coupling convex part 12a has a coupling back part 12b and a coupling tip part 12c. The coupling 12 is attached so that the coupling back portion 12b is substantially horizontal when the wind direction vane 4 closes the outlet 3b. Further, the coupling tip 12c is bent in accordance with an angle that restricts the rotational drive of the wind direction vane 4. Then, the coupling 12 is driven to rotate about the vane shaft 4 a together with the wind direction vane 4. Therefore, the wind direction vane 4 can be rotationally driven until the movement is blocked at the coupling convex portion 12 a of the coupling 12.

Here, in the present embodiment, the vane shaft 4a of the wind direction vane 4 and the coupling 12 are directly connected. Further, the rotary shaft 9a of the vane drive motor unit 9 and the coupling 12 are directly connected. Therefore, the rotary shaft 9 a of the vane drive motor unit 9 and the vane shaft 4 a on one side of the wind direction vane 4 are directly connected via the coupling 12. Since the rotary shaft 9a and the vane shaft 4a on one side are directly connected, it is not necessary to use a gear or the like. For this reason, it is not necessary to secure a place related to a rotation mechanism such as a gear. In addition, since the rotation of the rotation shaft 9a is directly transmitted to the wind direction vane 4, it is possible to increase the accuracy of rotationally driving the wind direction vane 4 without maintaining gears and the like with high accuracy.

FIG. 5 is a view for explaining the connection relationship between the wind direction vane 4 and the coupling 12 according to the first embodiment of the present invention. In FIG. 5, the bush 11 is omitted. The coupling 12 of the present embodiment has an insertion shaft 12d that is inserted into the vane shaft 4a. Further, the insertion shaft 12d has a coupling claw portion 12e having a claw that has an elastic force and becomes a projection slightly protruding from the insertion shaft 12d. Here, the nail is a protrusion, but it is not necessary to limit the nail as long as it is an elastic protrusion. On the other hand, the vane shaft 4a of the wind direction vane 4 has a bearing hole 4b into which the insertion shaft 12d of the coupling 12 is inserted. Moreover, it has the fitting hole 4c which fits the nail | claw of the coupling nail | claw part 12e. In the present embodiment, for example, when installing the indoor unit 1, the bush 11 is inserted into the vane shaft 4a, and the coupling 12 is attached.

At this time, the insertion shaft 12d of the coupling 12 is inserted up to the abutment of the wind direction vane 4. If it inserts to abut, the nail | claw of the coupling nail | claw part 12e which has elasticity will fit in the fitting hole part 4c because an elastic force works and a shape returns. By fitting the coupling claw portion 12e into the fitting hole 4c, the abutment state can be easily confirmed visually. Moreover, it can prevent that the coupling 12 comes off from the wind direction vane 4 (vane shaft 4a) because a nail | claw fits into the fitting hole part 4c.

FIG. 6 is a diagram showing a state in which a device related to driving is attached to the wind direction vane 4 of the indoor unit 1 according to Embodiment 1 of the present invention. In FIG. 6, for the sake of explanation, the normal mounting state is upside down. A vane drive motor unit 9 and the like are attached to the wind direction vane 4. Further, as shown in FIG. 6, the bush 11 is also attached to the vane shaft 4 a that is not connected to the rotary shaft 9 a of the vane drive motor unit 9. The wind direction vane 4 can be supported by receiving both shafts with the two bushes 11. The parts assembled as described above are attached to the decorative panel 3 to complete the attachment of the wind direction vanes 4.

FIG. 7 is a diagram for explaining the rotational drive restriction of the wind direction vane 4 by the coupling 12 in the indoor unit 1 according to Embodiment 1 of the present invention. In a state where the indoor unit 1 is stopped and the wind direction vane 4 closes the outlet 3b, the coupling back portion 12b is substantially horizontal. For example, even if the control of the motor or the like is not effective and the wind direction vane 4 tries to rotate in the counterclockwise direction from the state of FIG. 7, the closing degree stopper 10b of the motor holding metal plate 10 obstructs the rotation drive of the coupling 12. However, the wind direction vanes 4 are protected.

When the device having the refrigerant circuit starts operation and the indoor unit 1 operates, the control device sends a signal for rotating the wind direction vane 4 to the vane drive motor unit 9. Receiving the signal, the vane drive motor unit 9 rotates the rotary shaft 9a to drive the wind direction vane 4 to rotate. The coupling 12 is also rotationally driven with the rotation of the rotating shaft 9a and the rotational driving of the wind direction vane 4. The angle at the position where the coupling 12 is rotationally driven and the coupling tip 12c hits the opening side stopper 10a is a reference for the control for rotationally driving the wind direction vane 4. The control device gives an instruction to the vane drive motor unit 9 based on the reference, and performs control to rotate the wind direction vane 4 to a predetermined angle.

As described above, according to the indoor unit 1 of the present embodiment, the rotary shaft 9a and the vane shaft 4a are connected between the rotary shaft 9a of the vane drive motor unit 9 and the vane shaft 4a of the wind direction vane 4. In this way, by providing the coupling 12 having the coupling convex portion 12a having a structure in which the convex portion is elongated, independently on the bearing or the vane shaft, the angle related to the rotational driving of the wind direction vane 4 is achieved. It is possible to increase the detection accuracy of the opening limit, which is a reference for control. At this time, the rotation of the coupling 12 can be restricted by obstructing the movement of the coupling convex portion 12a by the opening side stopper 10a or the closing degree side stopper 10b of the motor holding metal plate 10. The vane drive motor unit 9 can be directly connected to the wind direction vane 4 without using a gear or the like to drive the wind direction vane 4 to rotate, thereby reducing the cost.

Further, according to the indoor unit 1 of the present embodiment, the vane shaft 4a of the wind direction vane 4 has the fitting hole portion 4c, and when the coupling 12 is attached to the wind direction vane 4 in the assembly of the indoor unit 1, An operator who performs assembly or the like confirms that the insertion shaft 12d of the coupling 12 has been inserted up to the butting of the bearing hole 4b by fitting the claw of the coupling claw portion 12e of the ring 12 into the fitting hole portion 4c. , At least visually (confirmed visually).

Embodiment 2. FIG.
Although not particularly shown in the above-described embodiment, for example, by forming the wind direction vane 4 and the coupling 12 in different colors, at least the claw of the coupling claw portion 12e is connected to the fitting hole portion 4c of the wind direction vane 4. By making the coloring different from the periphery, it is possible to easily recognize that the claws are fitted in the fitting holes 4c and the wind direction vanes 4 and the couplings 12 are securely inserted. .

Embodiment 3 FIG.
FIG. 8 is a diagram illustrating a configuration example of an air conditioner according to Embodiment 3 of the present invention. Here, FIG. 8 shows an air conditioner as an example of a refrigeration cycle apparatus. In FIG. 8, the same operations as those described in FIG. 1 and the like are performed. The air conditioner of FIG. 8 includes an outdoor unit (outdoor unit) 200 and the indoor unit (indoor unit) 1 described in the first embodiment or the second embodiment described above by a gas refrigerant pipe 300 and a liquid refrigerant pipe 400. Connect the piping. The outdoor unit 200 includes a compressor 210, a four-way valve 220, an outdoor heat exchanger 230, and an expansion valve 240.

Compressor 210 compresses and discharges the sucked refrigerant. Here, although not particularly limited, the compressor 210 can change the capacity of the compressor 210 (the amount of refrigerant sent out per unit time) by arbitrarily changing the operation frequency by using, for example, an inverter circuit. You may be able to. The four-way valve 220 is a valve that switches the flow of the refrigerant between, for example, a cooling operation and a heating operation.

The outdoor heat exchanger 230 in the present embodiment performs heat exchange between the refrigerant and air (outdoor air). For example, it functions as an evaporator during heating operation, evaporating and evaporating the refrigerant. Moreover, it functions as a condenser during the cooling operation, and condenses and liquefies the refrigerant.

An expansion valve 240 such as a throttle device (flow rate control means) decompresses the refrigerant to expand it. For example, when an electronic expansion valve is used, the opening degree is adjusted based on an instruction from a control device (not shown). The indoor heat exchanger 110 performs heat exchange between air to be air-conditioned and a refrigerant, for example. During heating operation, it functions as a condenser and condenses and liquefies the refrigerant. Moreover, it functions as an evaporator during cooling operation, evaporating and evaporating the refrigerant.

First, the cooling operation in the refrigeration cycle apparatus will be described based on the refrigerant flow. In the cooling operation, the four-way valve 220 is switched so as to have a connection relationship indicated by a solid line. The high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 210 passes through the four-way valve 220 and flows into the outdoor heat exchanger 230. The refrigerant (liquid refrigerant) condensed and liquefied by passing through the outdoor heat exchanger 230 and exchanging heat with outdoor air flows into the expansion valve 240. The refrigerant that has been decompressed by the expansion valve 240 and is in a gas-liquid two-phase state flows out of the outdoor unit 200.

The gas-liquid two-phase refrigerant that has flowed out of the outdoor unit 200 passes through the liquid refrigerant pipe 400 and flows into the indoor unit 1. Then, it is distributed by a distributor and a flow rate adjusting capillary (not shown) and flows into the indoor heat exchanger 110. As described above, the refrigerant (gas refrigerant) evaporated and gasified by passing through the indoor heat exchanger 110 and exchanging heat with air to be air-conditioned, for example, flows out of the indoor unit 1.

The gas refrigerant that has flowed out of the indoor unit 1 passes through the gas refrigerant pipe 300 and flows into the outdoor unit 200. Then, it passes through the four-way valve 220 and is sucked into the compressor 210 again. As described above, the refrigerant of the air conditioner circulates and performs air conditioning (cooling).

Next, the heating operation will be described based on the refrigerant flow. In the heating operation, the four-way valve 220 is switched so as to have a connection relationship indicated by a dotted line. The high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 210 passes through the four-way valve 220 and flows out of the outdoor unit 200. The gas refrigerant that has flowed out of the outdoor unit 200 passes through the gas refrigerant pipe 300 and flows into the indoor unit 1.

The refrigerant condensed and liquefied by passing through the indoor heat exchanger 110 and exchanging heat with air to be air-conditioned, for example, passes through the distributor and a flow rate adjusting capillary (not shown) and flows out of the indoor unit 1. .

The refrigerant flowing out of the indoor unit 1 passes through the liquid refrigerant pipe 400 and flows into the outdoor unit 200. Then, the refrigerant that has been decompressed by the expansion valve 240 and is in a gas-liquid two-phase state flows into the outdoor heat exchanger 230. Then, the refrigerant (liquid refrigerant) evaporated and gasified by passing through the outdoor heat exchanger 230 and exchanging heat with outdoor air passes through the four-way valve 220 and is sucked into the compressor 210 again. As described above, the refrigerant of the air conditioner circulates and performs air conditioning (heating).

In the above-described embodiment, the indoor unit 1 has been described as a four-way cassette type indoor unit that has the wind direction vanes 4 at the four outlets 3b and blows out air in four directions, but the present invention is limited to this. is not. For example, the present invention can also be applied to other ceiling-embedded indoor units corresponding to two-way and three-way air flows. Further, the present invention can be applied not only to the ceiling-embedded indoor unit but also to other types of indoor units. Further, the number of the air outlets 3b and the wind direction vanes 4 is not limited.

In the above-described embodiment, the air conditioner has been described as an example of the refrigeration cycle apparatus. However, the present invention is not limited to this. For example, the present invention can be applied to other refrigeration cycle apparatuses such as a refrigeration apparatus and a refrigeration apparatus. Moreover, it can be applied not only to the refrigeration cycle apparatus but also to a blower, a ventilator, or the like.

1 indoor unit, 2 housing, 3 decorative panel, 3a suction grille, 3b outlet, 4 wind direction vane, 4a vane shaft, 4b bearing hole, 4c fitting hole, 5 hanging bracket, 7 hanging bolt, 8, 8a makeup Panel corner part, 9 vane drive motor part, 9a rotating shaft, 9b screw, 10 motor holding sheet metal, 10a opening side stopper, 10b closing degree stopper, 11 bush, 12 coupling, 12a coupling convex part, 12b coupling Back, 12c coupling tip, 12d insertion shaft, 12e coupling claw, 110 indoor heat exchanger, 200 outdoor unit, 210 compressor, 220 four-way valve, 230 outdoor heat exchanger, 240 expansion valve, 300 gas refrigerant piping 400 liquid refrigerant piping.

Claims

A wind vane that rotates around the vane axis and changes the direction of the air blown from the outlet;
A vane driving device having a rotation shaft and rotating the wind direction vane;
An indoor unit comprising a drive range defining tool that is connected to the rotary shaft and the vane shaft between the rotary shaft and the vane shaft and defines a range in which the wind direction vane can be rotationally driven.
A drive device holder between the rotary shaft of the vane drive device and the vane shaft of the wind direction vane to which the vane drive device is attached;
The drive device holder has a stopper,
2. The indoor unit according to claim 1, wherein the drive range defining tool has a convex portion whose rotation drive with the wind direction vane is restricted by a stopper of the drive device holder.
The driving range defining tool includes a limit closing degree that is a maximum value that the wind direction vane is rotationally driven in a direction to close the outlet, and a limit opening that is a maximum value that the wind direction vane is rotationally driven in a direction to open the outlet. The indoor unit according to claim 2, wherein at least one of the two is restricted.
The vane shaft of the wind direction vane has a bearing hole and a fitting hole that penetrates a side surface of the vane shaft,
The drive range defining tool includes an insertion shaft inserted into the bearing hole, and a protrusion provided on the insertion shaft and capable of being fitted into the fitting hole. The indoor unit according to one item.
An air conditioner comprising the indoor unit according to any one of claims 1 to 4 and an outdoor unit to perform air conditioning.