JP5786086B2 - Built-in air conditioner - Google Patents

Description

  The embodiment of the present invention relates to a built-in type air conditioner that is installed on the ceiling of a building and sucks heat exchange air that has been sucked and heat-exchanged into a room through a blow-out duct.

  Built-in type air conditioners (ceiling-embedded air conditioners) installed behind the ceiling of buildings are often used. An indoor heat exchanger and a blower are accommodated in the unit main body. For example, a suction port is opened on one side of the main body, and a blowout duct is connected to the other side. The blower is driven, sucks air from the suction port, exchanges heat with the indoor heat exchanger, and blows heat exchange air into the room through the blowout duct.

  Also in this type of air conditioner, an electric expansion valve connected to the indoor heat exchanger via a refrigerant pipe, an electric control component that drives an electric component such as a blower, and an electronic circuit mounted by mounting this electric control component The control board etc. which comprise are provided. Although these electric control components and the control board are accommodated in the electric component box, it is inevitable that heat is generated due to the action.

  As it is, the temperature in the electric component box rises and adversely affects the internal components. Therefore, for example, in [Patent Document 1], an electrical box is attached to the outer surface of the unit body. The electrical box includes a protruding portion having an air inlet and an outlet, and the protruding portion protrudes from the opening provided on the outer surface of the unit body into the blowing path of the blowing fan in the unit body.

JP 2009-30829 A

  However, since the installation site of the built-in type air conditioner is behind the ceiling that is not visible from inside the room, electrical components are housed inside the unit body in order to prevent the spread of fire from the back of the ceiling when a fire breaks out from the electrical box. It is desirable to do.

  Moreover, drain water is produced | generated and dripped from an indoor heat exchanger with a refrigerating cycle operation. This drain water is received by a drain pan provided at the lower part of the indoor heat exchanger, and is usually drained through a drain pump provided in the drain pan.

  In the maintenance work for the drain pan and the drain pump, the unit main body is not provided with an inspection port, and therefore, one side surface of the unit main body is removed. Therefore, it takes a lot of labor before the maintenance process for the drain pan and the drain pump is reached.

  Under such circumstances, a built-in type air conditioner that accommodates an electrical component box in the unit main body and facilitates maintenance work on the drain pan and the drain pump has been desired.

In the built-in type air conditioner of this embodiment, the unit main body is installed behind the ceiling of the building, and the interior is partitioned by a partition plate into a blower chamber in which the blower is arranged and a heat exchange chamber in which an indoor heat exchanger is arranged.
A first inspection port was provided on the side of the unit main body facing the blower chamber, and a second inspection port was provided on the side of the unit main body facing the heat exchange chamber. Further, the built-in type air conditioner is detachably fitted into the first inspection port, is located in the blower chamber, and can freely open and close the electric component box that houses the electric control component and the control board, and the first inspection port. A first lid plate that is closed, the first lid plate has a recess, the first inspection port is formed in a recess on the opposite side of the recess of the first lid plate, and the first lid plate In the state where the first cover plate is closely attached to the peripheral edge of the first inspection port, the first cover plate is adjusted to the diameter of the power line passing through the gap. And made it slidable.

The side view of the built-in type air conditioner based on this embodiment. The side view of the built-in type air conditioner of the form different from FIG. 1 based on the embodiment. The perspective view of the built-in type air conditioner which removed the lower surface board of the unit main body based on the embodiment. The cross-sectional top view of the built-in type air conditioner based on the embodiment. The perspective view of the built-in type air conditioner which open | released the 1st cover plate based on the embodiment. The perspective view of a part of unit main body which opened the 1st inspection port and removed the 2nd cover plate based on the embodiment. The perspective view of a part of unit main body which further removed the electrical component box from the state of FIG. 6 based on the embodiment. Sectional drawing of a part of unit main body which shows an electrical component box through a partition plate from the heat exchange chamber side based on the embodiment. The perspective view of the 1st cover plate based on the embodiment. The perspective view of a part of unit main body which shows the 1st inspection port and an electrical component box by removing the 1st cover plate based on the embodiment. The perspective view which shows the mutually different engagement state of the 1st hook hole with respect to the 1st hook nail | claw based on the embodiment. The perspective view which shows the mutually different engagement state of the 1st hook hole with respect to the 1st hook nail | claw based on the embodiment. The cross-sectional top view which shows the engagement state of the 1st hooking hole with respect to the 1st hooking nail | claw based on the embodiment. The perspective view of a part of unit body which attached the 1st cover plate to the 1st inspection port based on the embodiment. The unit main body partial perspective view which shows the 1st cover plate which loosened the attachment screw based on the embodiment. The perspective view of a part of unit main body which closed the 1st cover plate after connecting the comparatively thin power wire and signal wire | line to an electrical component box based on the embodiment. The perspective view of a part of unit main body which closed the 1st cover plate after connecting the normal thick power supply line and signal line based on the embodiment to an electrical component box. The front view of the 1st cover plate which shows the modification of the embodiment. The perspective view of a part of unit main body which attached the 1st cover plate of the modification based on the embodiment to the 1st inspection port. The perspective view of a part of unit main body which shows the 1st inspection port which attached the electrical component box based on the embodiment. The perspective view of a part of unit main body which shows the 1st inspection port which removed the electrical component box based on the embodiment. The perspective view of the electric component box independent based on the embodiment. The front view of a part of unit main part which shows the electrical component box temporarily fixed based on the embodiment. The perspective view which looked up the unit main body part from the lower part which shows the electrical component box temporarily fixed based on the embodiment. The longitudinal cross-sectional view which expands and shows the principal part for temporarily fixing the electrical component box to a unit main body based on the embodiment.

Hereinafter, the present embodiment will be described with reference to the drawings.
FIG. 1 is a side view of a built-in type air conditioner AC. FIG. 2 is a side view of a different example of the built-in type air conditioner AC.

The built-in type air conditioner AC of any example is also installed in the ceiling U of the building S having a relatively large room (air-conditioned room area) R.
Specifically, a suspension fitting 2 protrudes from the side of the unit main body 1, and a suspension bolt F suspended from the ceiling T of the building S is inserted into a hole provided in the suspension fitting 2. . Furthermore, a nut is screwed into the suspension bolt F, and the unit body 1 is suspended together with the suspension fitting 2.

  The unit main body 1 has a thin rectangular box shape whose height dimension is shorter than the width direction (front and back direction of the paper surface) dimension and the depth direction (left and right direction of the paper surface). Below the ceiling decorative plate K is a room R in which heat is exchanged by the built-in type air conditioner AC.

  In any unit main body 1 of any example, an indoor heat exchanger and a blower (not shown) are accommodated in the unit main body 1. A blowout duct 3 is connected to the front portion a of the unit body 1. The blowout duct 3 extends from the unit main body 1 between the ceiling decorative plate K, which is the ceiling back U of the building S, and the ceiling T, and is connected to a suction grill (not shown) provided at a predetermined position of the ceiling decorative plate K. The

  An air filter 4 is attached to the lower surface portion b of the unit body 1 shown in FIG. The air filter 4 removably covers a suction port provided in the unit body 1. A suction grill G is provided in a part of the ceiling decorative plate K facing the air filter 4.

The unit main body 1 shown in FIG. 2 is provided with a suction port in the back surface portion c, and a suction duct 5 is connected thereto via an air filter. The suction duct 5 extends along the ceiling back U and is connected to a blowout grill (not shown) provided at a predetermined position of the ceiling decorative plate K.
As for built-in type air conditioner AC, either unit main body 1 shown in FIG. 1 or unit main body 1 shown in FIG. 2 is selected according to the situation of the installation site.

  The built-in type air conditioner AC configured as described above circulates refrigerant from the outdoor unit to the indoor heat exchanger by driving the compressor accommodated in the outdoor unit. Evaporate or condense.

  On the other hand, the room R air is led into the inside of the unit body 1 through the suction guide grill G or the suction duct 5 from the suction port covered with the air filter 4. And it distribute | circulates an indoor heat exchanger and heat-exchanges with the refrigerant | coolant which circulates inside.

  Due to the action of the indoor heat exchanger, the air sucked into the unit main body 1 changes to cool air or warm air. The heat exchange air such as cold air or warm air is blown out to the blowout duct 3 and further led into the room R from the blowout grill. Accordingly, the room R performs a cooling action or a heating action.

Hereinafter, the structure of the built-in type air conditioner AC will be described. However, the description regarding a suction inlet, an air filter, and a suction duct is abbreviate | omitted.
FIG. 3 is a perspective view of the unit main body 1 showing the inside after removing the bottom plate. FIG. 4 is a cross-sectional plan view of the unit body 1.

  The unit main body 1 is provided across four side plates that are arranged opposite to each other and provided in a square frame shape, a top plate that is provided over the upper edge portion of each side plate, and a lower edge portion of each side plate. It consists of a bottom plate. A blow-out duct, which will not be described, is connected to a part of the side plate, a suction duct is connected to the opposite side plate, or a suction port is provided in a part of the bottom plate.

The interior of the unit body 1 is partitioned by a partition plate 8 into a blower chamber 10 shown on the left side in FIG. 3 and on the lower side in FIG. 4, and a heat exchange chamber 11 shown on the right side in FIG.
A blower 12 is disposed in the blower chamber 10. The blower 12 includes a left and right biaxial fan drive motor 13, a blower fan (for example, a sirocco fan composed of approximately 50 blade rows) 14 connected in series to the respective rotation shafts of the fan drive motor 13, and Each blower fan 14 has an axial side opening and a casing 15 that covers the circumferential surface.

  The casing 15 of the blower 12 includes a blowout opening 15 a that opens to the partition plate 8. The fan drive motor 13 rotationally drives the blower fan 14 so that air is sucked in from the axial direction of the blower fan 14 and blown out from the blowout opening 15a in the circumferential direction to the heat exchange chamber 11 via the partition plate 8. It has become.

  The blower chamber 10 configured in this manner includes an electric control component that controls all the electric components housed in the unit main body 1, a control board that mounts the electric control component and constitutes an electric circuit, and the like. The provided electrical component box 17 is provided as described later.

  An indoor heat exchanger 18 is disposed in the heat exchange chamber 11. This indoor heat exchanger 18 is a fin tube type in which a large number of fins are arranged side by side with a narrow gap, and a refrigerant pipe passes through these fins. As a whole, it has a flat plate shape and is inclined obliquely.

  One end portion of the refrigerant pipe constituting the indoor heat exchanger 18 is connected to a refrigerant pipe connection port 19 a provided on one side plate of the unit body 1. The other end of the refrigerant pipe is also connected to a refrigerant pipe connection port 19b provided on the same side plate of the unit body 1. The indoor heat exchanger 18 is connected to an outdoor unit (not shown) using a refrigerant pipe (gas pipe) connected to the refrigerant pipe connection port 19a and a refrigerant pipe (liquid pipe) connected to the refrigerant pipe connection port 19b. The

  Further, a drain tray (not shown) is provided on the lower surface portion of the indoor heat exchanger 18. The drain pan receives drain water generated from the indoor heat exchanger 18 in accordance with the refrigeration cycle operation. Furthermore, the drain pump 20 is disposed in the drain tray soaking in the drain water, and the drain water accumulated in the drain tray is forcibly drained.

  The drain pump 20 is supported as described later, and is connected to a drain pipe connection port 20a provided on the same unit main body 1 side plate as the refrigerant pipe connection ports 19a and 19b. Further, a drain discharge port 20b is provided, which is used when draining from the drain tray to the outside naturally using the height difference.

  FIG. 5 is an external perspective view of the built-in type air conditioner AC showing the electrical component box 17 by opening the first cover plate 24. FIG. 6 shows a part of the unit main body 1 in which the first inspection port 21 is opened from the side of the heat exchange chamber 11 to show the electrical component box 17 and the second cover plate 25 is removed to show the internal structure. It is a perspective view.

  A first inspection port 21 and a second inspection port 22 are provided on one side plate of the unit body 1. The first inspection port 21 is closed by a first lid plate 24 so as to be opened and closed, and the second inspection port 22 is closed by a second lid plate 25 so as to be opened and closed.

  FIG. 5 shows a state in which the first inspection plate 21 is opened by rotating the first cover plate 24, and the second inspection plate 22 is closed by the second cover plate 25. The electrical component box 17 is fitted in the first inspection port 21. The front surface of the electrical component box 17 is an opening and communicates with the first inspection port 21. Therefore, the first cover plate 24 also has a function of opening and closing the opening of the electrical component box 17.

  As shown in FIG. 6, the first inspection port 21 and the second inspection port 22 are provided to face the side portions of the blower chamber 10 and the heat exchange chamber 11 that are partitioned via the partition plate 8. Here, the first cover plate 24 that opens and closes the first inspection port 21 is omitted. The drain pump 20 and a float switch (not shown) are attached to the back side of the second lid plate 25 that opens and closes the second inspection port 22.

  As the second cover plate 25 is opened from the second inspection port 22, the drain pump 20 and the float switch are integrally removed from the drain tray. Therefore, the maintenance work for the drain pump 20 and the float can be performed, and the maintenance work for each component arranged in the heat exchanger chamber 11 such as the drain pan from the opened second inspection port 22 is also possible.

The electrical component box 17 is detachably attached to the unit body 1 as will be described later.
FIG. 7 is a partial perspective view of the unit main body 1 in a state where the electric component box 17 is also removed from the unit main body 1 together with the first lid plate 24.

  As described above, the electrical component box 17 is a box that has a front surface that has a side surface facing the opening and side plates on the upper, lower, left, and right peripheral surfaces. Further, as the blower 12 is driven, an opening is appropriately provided so that cooling air flows through the blower 12. A control board is attached to the side surface. The control board is mounted with the blower 12 accommodated in the unit main body, and electrical control components and connectors for controlling all other electrical components.

  In a state where the electrical component box 17 is fitted in the first inspection port 21, the side plate 17a on one side of the electrical component box 17 contacts the partition plate 8, but only this side plate 17a constitutes the other peripheral surface. It is formed in a shorter dimension than.

  On the other hand, in the vicinity of the end portion on the first inspection port 21 side of the partition plate 8, wiring holes 27a and 27b, which are a pair of long holes spaced apart in the vertical direction, are opened. These wiring holes 27 a and 27 b are provided in a portion facing the side plate 17 a of the electrical component box 17 in a state where the electrical component box 17 is fitted in the first inspection port 21.

FIG. 8 is a partial cross-sectional view of the unit body 1 showing the electrical component box 17 fitted into the first inspection port 21 via the partition plate 8 from the heat exchange chamber 11 side.
Here, the relationship between the length of the long holes of the plurality of wiring holes 27 a and 27 b provided in the partition plate 8 and the length of the side plate 17 a in contact with the partition plate 8 of the electrical component box 17 is shown.

  Although the length of the pair of upper and lower wiring holes 27a and 27b is the same as each other, their positions are shifted. That is, the upper wiring hole 27a is provided to be shifted to the first and second inspection ports 22 and 22 side to some extent from the lower wiring hole 27b.

When the electrical component box 17 is removed from the first inspection port 21, the wiring holes 27a and 27b are opened as they are. However, in a state where the electrical component box 17 is fitted in the first inspection port 21, the wiring holes 27a and 27b are almost blocked by the side plates 17a of the electrical component box 17, and the first and second portions are slightly closed. Only the inspection port 22 and 22 side edge part open.
Since the positions of the wiring holes 27a and 27b are shifted, the remaining opening area of the upper wiring hole 27a is larger than the opening area of the lower wiring hole 27b.

  The heat exchange chamber 11 is provided with electrical components such as a drain pump 20, a float switch, a motor for an electric expansion valve (PMV), a heat exchanger temperature sensor, and the like, and electric wiring is connected to each. The electrical wiring connected to each electrical component is inserted through the upper and lower wiring holes 27 a and 27 b provided in the partition plate 8 and electrically connected to the electrical component box 17.

  In a state where the electrical component box 17 is not fitted in the first inspection port 21, electrical wiring connected to each heat exchange chamber side electrical component is inserted into the upper and lower wiring holes 27a and 27b. Since each of the wiring holes 27a and 27b has an opening area that is larger than the electrical wiring, the insertion work is easy and workability is good.

After the insertion, the electrical component box 17 is fitted into the first inspection port 21 and fixed as described later, and then the electrical wiring inserted through the wiring holes 27a and 27b is connected to the connectors in the electrical component box 17. . At this time, as shown in FIG. 8, each of the wiring holes 27 a and 27 b is closed by the side plate 17 a of the electrical component box 17, leaving a necessary minimum opening area through which the electrical wiring is inserted.
Therefore, in the actual refrigeration cycle operation, the inflow of air from the heat exchange chamber 11 into the electric component box 17 can be minimized. It is possible to suppress the leakage of heat exchange air after heat exchange with the indoor heat exchanger 18 and to improve the heat exchange efficiency.

  The electric wiring includes a power supply line that requires power for driving the motor such as the drain pump 20 and a signal line that requires weak power such as a heat exchanger temperature sensor. Therefore, the electric wiring is classified into a power supply line and a signal line, and each is inserted into another wiring hole 27a or 27b. As a result, the electrical control component is hardly affected by noise, and the quality can be improved.

Since the wiring holes 27a and 27b are provided with their positions shifted, the opening area of the remaining upper wiring hole 27a in the state in which the electrical component box 17 is fitted into the first inspection port 21 is lower wiring. It is larger than the use hole 27b. On the other hand, since the power supply line has a large diameter and the signal line has a small diameter, the power line is inserted through the upper wiring hole 27a, and the signal line is inserted through the lower wiring hole 27b.
Moreover, since the electrical component box 17 can be removed from the 1st inspection port 21, it cannot be overemphasized that the insertion check of the electrical wiring connected to heat exchanger room side components, such as the drain pump 20, and maintenance work can be performed easily. .

Next, the first cover plate 24 that opens and closes the first inspection port 21 will be described in detail.
FIG. 9 is a perspective view of the first lid plate 24. FIG. 10 is a partial perspective view of the unit main body 1 showing the first inspection port 21 and the electrical component box 17 with the first cover plate 24 removed.

  As shown in FIG. 9, the first lid plate 24 has a folded portion 24b along the peripheral edge of the main plate 24a with respect to the flat main plate 24a. The side edge portion and the upper edge portion constituting the peripheral edge portion are formed in a straight shape, but the other side edge portion opposite to the side edge portion is narrow in accordance with the other side edge portion of the first inspection port 21, Widely stepped across the bottom.

  A first recess 24 c and a second recess 24 d smaller than the first recess 24 c are provided at the lower edge of the first lid plate 24. On the other hand, a third recess is formed in the lower edge portion of the first inspection port 21 at a position facing the first recess 24c provided in the first cover plate 24 and on the opposite side. 21a is provided.

  A long and narrow slit-like first hook hole 28a and second hook hole 28b are provided on one side edge of the folded portion 24b of the first lid plate 24 so as to be spaced apart from each other in the vertical direction. On the side of the main plate 24a opposite to the one side edge where the first and second hooking holes 28a, 28b are provided, there are a first screw fixing hole 29a consisting of a vertically long slot, and a second The screw fixing holes 29b are spaced apart from each other in the vertical direction.

  Since the first and second hooking holes 28a and 28b are provided at the edge portion on the side of the folded portion 24b formed in a straight shape, the second hooking hole 28b is formed immediately below the first hooking hole 28a. To position. On the other hand, since the side portion of the main plate 24a is formed in a step shape, the second screw fixing hole 29b is not located immediately below the first fixing hole 29a but is provided in a shifted position.

On the other hand, as shown in FIG. 10, the first hooking claw 30a and the second hooking claw 30b formed by cutting up are separated from each other at one side edge of the first inspection port 21 in the unit main body 1. It is projected.
Further, a pair of screw holes are provided on the side surface of the unit main body 1 that is in the vicinity of the other side edge of the first inspection port 21, and mounting screws (lower mounting screws are not shown) 31. Is screwed.

The first lid plate 24 and the first inspection port 21 configured as described above are attached to the first inspection port 21 as described below.
11A and 11B are perspective views showing different states in which the first hooking claw 30a is engaged with the first hooking claw 30a and the first hooking hole 28a provided in the first lid plate 24 is engaged. FIG. 12 is a cross-sectional plan view showing a state in which the first hooking hole 28a is engaged with the first hooking claw 30a.

  Here, the relationship between the second hooking claw 30b and the second hooking hole 28b is not shown, but the relationship between the first hooking claw 30a and the first hooking hole 28a is exactly the same. Therefore, explanation is omitted.

  A first hooking hole 28 a provided in the first cover plate 24 is engaged with a first hooking claw 30 a provided in the unit main body 1. Since the vertical dimension of the first hooking hole 28a is formed to be extremely long with respect to the vertical dimension of the first hooking claw 30a, the first lid plate 24 is formed as shown in FIGS. 11A and 11B. Within the range of one hooking hole 28a, it is movable in the vertical direction.

  In addition, as shown in FIG. 12, the first hooking claw 30a is bent in two steps from the unit body 1, while the width dimension of the first hooking hole 28a is the first hooking claw. There is a margin wider than the plate thickness of 30a. Therefore, the first cover plate 24 having the first hooking hole 28a is rotatable with respect to the unit main body 1.

  FIG. 13 is a partial perspective view of the unit body 1 showing a state where the first lid plate 24 is actually attached to the first inspection port 21 and rotated. FIG. 14 is a partial perspective view of the unit main body 1 showing a state in which the first inspection plate 21 is closed by the first lid plate 24, but the mounting screw 31 is loosened to be movable.

  When the first cover plate 24 is attached to the first inspection port 21, the first and second hooking holes 28 a and 28 b provided in the first cover plate 24 are connected to one side edge of the first inspection port 21. Are inserted into the first and second hooking claws 30a and 30b. As shown in FIG. 13, the first cover plate 24 is rotatable.

  Further, the first cover plate 24 is rotated so as to be in close contact with the peripheral portion of the first inspection port 21. Next, the mounting screw 31 is loosely screwed into the screw hole of the unit main body 1 through the first screw fixing hole 29a and the second screw fixing hole 29b provided in the lid plate 24. As shown in FIG. 14, the first lid plate 24 is loosely closed except for a part of the first inspection port 21 (third recess 21 a). Further, by releasing the hand holding the first cover plate 24, the first lid plate 24 is displaced by its own weight.

  In this state, the upper ends of the first and second hooking holes 28a and 28b of the first cover plate 24 are hooked on the first and second hooking claws 30a and 30b of the unit body 1, The upper ends of the first and second screw fixing holes 29 a and 29 b are hooked on the mounting screw 31. Further, the first recess 24 c provided at the lower edge portion of the first lid plate 24 and the third recess 21 a provided at the lower edge portion of the first inspection port 21 overlap each other with a gap.

  That is, even when the first cover plate 24 is at the lowest position within the range of the first and second hooking holes 29a and 29b, the first recess 24c is provided in the first inspection port 21. 3 recesses 21a are not completely closed. The second recess 24d is provided only to avoid the head of the mounting screw that is fastened to the unit main body 1, and is not related to the local wiring. In the above, the case where the first cover plate 24 is attached to the first inspection port 21 has been described. However, the wiring in the electrical component box 17 is performed in the electrical component box 17 in a state where necessary wiring processing is performed. The same applies to the maintenance work.

In other words, when performing this maintenance work, the first inspection port 21 must be opened. The first cover plate 24 can be turned by rotating the first cover plate 24. At this time, the first and second hooking claws 30a and 30b provided in the unit main body 1 are provided on the first cover plate 24. The second hooking holes 28a and 28b can be held in the state shown in FIG.
Therefore, wiring work and maintenance work can be performed without removing the first cover plate 24 from the first inspection port 21, and workability can be improved.

  After performing the wiring process for the inside of the electrical component box 17, the electrical wiring is provided in the third recess 21 a provided in the first inspection port 21 and the first lid plate 24 that closes the first inspection port 21. The first recess 24c is inserted into the mating portion.

  FIG. 15 is a partial perspective view of the unit main body 1 in a state in which the first lid plate 24 is closed after the relatively thin power supply line Da and the signal line C are connected in the electrical component box 17. FIG. 16 is a partial perspective view of the unit main body 1 in a state where the first lid plate 24 is closed after the normal thick power supply line Db and the signal line C are connected in the electric component box 17.

  In any case, after the wiring processing operation for the inside of the electrical component box 17 is completed, the first cover plate 24 is rotated and brought into close contact with the unit main body 1 to close the first inspection port 21. The mounting screw 31 is loosely screwed into the screw hole of the unit body 1 through the first and second screw fixing holes 29a and 29b provided in the first lid plate 24.

  In this state, the hand is released from the first cover plate 24 and lowered by its own weight. In both cases, the first recess 24c is aligned with the third recess 21a. However, when the relatively thin power supply line Da and signal line C shown in FIG. It drops as much as possible and comes into contact with the electrical wirings Da and C. Therefore, the mounting screw 31 is tightened.

  When the power supply line Db having the normal diameter and the signal line C shown in FIG. 16 are connected, the electric wires Db and C come into contact with each other as soon as they are released. The lowering amount of the first cover plate 24 is very small, and the first and second hooking claws 30a and 30b are located at substantially the middle portions of the first and second hooking holes 28a and 28b. The mounting screw 31 is located substantially in the middle of the first and second screw fixing holes 29a and 29b. Therefore, each mounting screw 31 is tightened.

  As described above, the position of the first cover plate 24 can be naturally varied according to the local wiring having various thicknesses passing through the first cover plate 24. As in the past, it is possible to omit the trouble of plugging the gap between the electrical wiring and the through hole using another part, such as fitting a rubber bush into the wiring through hole or pasting a heat insulating material with a slit after the wiring work is completed, Costs can be reduced and workability can be improved.

  Depending on the maintenance work in the electrical component box 17, it is not possible to secure a work space only by rotating the first cover plate 24, and the first cover plate 24 is removed to open the front opening of the electrical component box 17. It may be necessary to fully open. However, since the mounting screw 31 for mounting and fixing the first lid plate 24 is small and easily lost, it is desired to keep it screwed into the unit body 1.

  FIG. 17 is a front view of a first lid plate 24Z showing a modification for satisfying this type of demand. FIG. 18 is a partial perspective view of the unit main body 1 in a state in which the first inspection port 21 is opened using the first lid plate 24Z according to a modified example.

The first and second hooking holes 28a and 28b provided in the first cover plate 24Z and the first and second hooking claws 30a and 30b provided in the unit main body 1 are shaped as described above. It may be a structure.
The first and second screw fixing holes 29aa and 29bb provided in the first lid plate 24Z are formed in a shape in which the lower ends thereof swell. Specifically, large holes 100 and 101 are provided at the lower ends of the second screw fixing holes 29aa and 29bb. The diameter of the large hole portion 100 is set larger than the head diameter of the mounting screw 31.

  After the on-site wiring is performed, the mounting screw 31 is positioned at the position of the first cover plate 24Z while being shifted, and the mounting screws 31 are large hole portions 100, 101 which are lower end portions of the first and second fixing holes 29aa, 29bb. Located at the top. Therefore, the first cover plate 24Z can be fixed by tightening the mounting screw 31.

  In the maintenance work, the first cover plate 24Z is pushed up after the mounting screw 31 is loosened. Then, the mounting screw 31 faces the large hole portions 100 and 101 of the first and second fixing holes 29aa and 29bb. As described above, the diameter of the large hole portions 100 and 101 is set larger than the diameter of the head portion of the mounting screw 31.

  Accordingly, as shown in FIG. 18, the first cover plate 24 </ b> Z can be extracted from the mounting screw 31 and rotated without removing the mounting screw 31. Thereafter, the first and second hooking holes 28a and 28b may be extracted from the first and second hooking claws 30a and 30b, and the first inspection port 21 is completely opened. Therefore, it becomes easy to perform maintenance work on the electrical component box 17, and workability can be improved.

  Next, the mounting structure of the electric component box 17 to the unit body 1 will be described in detail. FIG. 19 is a partial perspective view of the unit main body 1, showing a state in which the electrical component box 17 is attached and fixed to the first inspection port 21. FIG. 20 is a partial perspective view of the unit main body 1 showing the first inspection port 21 after the electric component box 17 is removed. FIG. 21 is a perspective view of the electric component box 17 alone.

  First, the first inspection port 21 will be described. As shown in FIG. 20, one side portion of the first inspection port 21 is shared by a partition plate 8 that partitions the unit body 1 into the blower chamber 10 and the heat exchange chamber 11. To do. The pair of upper and lower wiring holes 27 a and 27 b described above are provided at the end of the partition plate 8. A first hooking claw 30a and a second hooking claw 30b are bent at the side edge of the first inspection port 21 on the partition plate 8 side so as to be vertically separated.

  The upper edge portion of the first inspection port 21 is a bent piece that is bent, and a slit 32 that is an elongated hole portion is provided along the bent piece. The remaining edge has a step shape as described above, or is formed with a recess.

A lower bent piece 33 is formed along the lower end of the partition plate 8, and a plurality of, for example, two holes 34, 34 are provided therein. A hooking projection 35 that projects toward the blower chamber 10 is integrally provided on a part of the lower bent piece 33 that is separated from the holes 34 and 34. The hooking protrusion 35 is provided with a plurality of burring holes 36, 36 which are positioning holes.
The lower part of the unit main body 1 that is separated from the lower side of the first inspection port 21 is a bent piece 37, and the above-described lower surface plate constituting the unit main body 1 can be attached.

  As shown in FIG. 21, the electrical component box 17 has a box-like shape having an opening on the front surface, side plates provided at positions facing the opening, and side plates on the upper and lower sides and the left and right sides of the side plate. Make. The width dimension of some side plates 17a is shorter than the other side plates. As described above, the control board on which the electrical control component is mounted is fitted into the side plate facing the opening.

On a part of the front surface of the side plate 17b that forms the upper side of the electrical component box 17, a protrusion 38 that is bent integrally with the side plate 17b is provided. The protrusion 38 has a length dimension and a thickness that can be inserted into the slit 32 provided in the unit main body 1.
Further, the protrusion 38 is provided with a temporary fixing hole 39 made of a long hole. The temporary fixing hole 39 has a length that can be inserted into the hooking protrusion 35 provided in the unit body 1. Formed into dimensions.

  A plurality of, for example, two screw holes 40, 40 are provided in the side plate 17 c that forms the lower side of the electrical component box 17. These screw holes 40, 40 are at positions facing the hole portions 34, 34 provided in the lower bent piece 33 of the partition plate 8 in a state where the electric component box 17 is fitted into the first inspection port 21.

  The electrical component box 17 configured as described above is fitted into the first inspection port 21. Therefore, as shown in FIG. 19, the protrusion 38 provided on the upper side plate 17 b of the electrical component box 17 is inserted into the slit 32 at the upper edge of the first inspection port 21, and the lower side portion of the electrical component box 17. Is supported by a bent piece portion 37 of the unit main body 1.

  The side plate 17 a of the electrical component box 17 abuts against the partition plate 8, and the screw hole 40 provided in the lower side portion of the electrical component box 17 faces the holes 34 and 34 provided in the lower side portion of the partition plate 8. Therefore, the electrical component box 17 is attached in a state where the first inspection port 21 is completely closed by screwing the attachment screw 41 into the screw hole 40 through the hole 34.

  That is, by inserting the protrusion 38 of the electrical component box 17 into the slit 32 provided at the upper edge of the first inspection port 21, positioning for closing the first inspection port 21 with the electrical component box 17 can be performed. it can. Furthermore, the electrical component box 17 can be fixed to the first inspection port 21 with a plurality of, for example, two mounting screws 41.

It is possible to fix the electric component box 17 with a small number of mounting screws 41 without taking time for mounting, and to shorten the working time and improve workability.
As described above, since the opening of the electrical component box 17 is completely opened, the front opening of the electrical component box 17 may be closed with the first lid plate 24 after performing the necessary wiring work. .

The electrical component box 17 is once attached at a position where the first inspection port 21 is closed. However, when the electrical component box 17 is in the way of the wiring work or when the maintenance work is performed, the electrical component box 17 is There are cases where it gets in the way.
FIG. 22 is a partial front view of the unit body 1 with the electrical component box 17 temporarily fixed. FIG. 23 is a partial perspective view of the unit main body 1 when the temporarily secured electrical component box 17 is viewed from below. FIG. 24 is an enlarged vertical cross-sectional view of a main part in which the electrical component box 17 is temporarily fixed to the unit body 1.

If the electrical component box 17 is in the normal position that closes the first inspection port, it is moved to the temporary fixing position.
Specifically, after the mounting screw 41 is removed, the electric component box 17 is held and the position is shifted to the rear side of the first inspection port 21 so as to be in an oblique posture. The lower side plate 17c of the component box 17 is removed. The protrusion 38 provided on the upper side is extracted from the slit 32 of the first inspection port 21 with the electrical component box 17 in an oblique posture.

  The extracted electrical component box 17 is rotated so that the opening is directed to the blower chamber 10 side. Then, the temporarily fixing hole 39 provided in the protrusion 38 is engaged with the hooking protrusion 35 provided in the lower bent piece 33 of the partition plate 8. This state is shown in FIGS. 22 and 23, and the electric component box 17 is not only projected from the lower part of the unit body 1 but is also suspended from the hooking projection 35.

  As shown in FIG. 24, the hooking protrusion 35 is provided with a plurality of positioning hole burring holes 36 facing upward, so that the protrusion 38 of the electric component box 17 extends to the back beyond this. Hang after moving. Even if the electrical component box 17 is about to move unexpectedly, the convex portion of the burring hole 36 restricts the movement and suppresses the risk of dropping.

  As described above, the electrical component box 17 can easily perform the wiring work and maintenance work by completely opening the first inspection port 21. However, the electrical component box 17 only moves to the vicinity of the first inspection port 21.

Therefore, after these operations are completed, the temporary fixing hole 39 of the hooking projection 35 is extracted from the hooking projection 35, and the electric component box 17 is again put in a predetermined position where the first inspection port 21 is completely closed. Can be installed.
Since the temporary fixing position of the electrical component box 17 is in the immediate vicinity of the first inspection port 21, the electrical component box 17 can be easily reset and workability can be improved.

  As mentioned above, although this embodiment was described, the above-mentioned embodiment is shown as an example and does not intend limiting the range of embodiment. The novel embodiment can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS S ... Building, U ... Ceiling back, 1 ... Unit main body, 12 ... Blower, 10 ... Blower room, 18 ... Indoor heat exchanger, 11 ... Heat exchange room, 8 ... Partition plate, 21 ... First inspection port, 22 ... Second inspection port, 17 ... Electric parts box, 24 ... First lid plate, 25 ... Second lid plate, 20 ... Drain pump, 27a, 27b ... Hole for wiring, 32 ... Slit, 38 ... Pull Hanging projection, 39... Temporary fixing hole.

Claims (6)

A unit body installed behind the ceiling of the building;
A partition plate that divides the inside of the unit main body into a blower chamber in which a blower is disposed, and a heat exchange chamber in which an indoor heat exchanger is disposed;
A first inspection port provided on the side of the unit main body facing the fan chamber, and a second inspection port provided on the side of the unit main body facing the heat exchange chamber;
An electrical component box that is detachably fitted into the first inspection port, is located in the blower chamber, and houses an electrical control component and a control board;
A first lid plate for closing the first inspection port so as to be freely opened and closed;
With
The first lid plate has a recess,
The first inspection port has a recess formed on the opposite side of the recess of the first cover plate and overlapping with the recess of the first cover plate with a gap,
The first lid plate is slidable in accordance with the diameter of the power line passing through the gap in a state where the first lid plate is in close contact with the peripheral edge of the first inspection port. Built-in type air conditioner characterized by The unit body has a hooking claw on one side edge of the first inspection port, and has a screw hole in the vicinity of the side edge on the opposite side of the one side edge,
The first cover plate has a hooking hole having a dimension longer than that of the hooking claw on one side edge, and a fixing hole that is a long hole on the side opposite to the one side edge. ,
The first cover plate is closed by the first cover plate in a state where the hooking claw is engaged with the hooking hole and a screw is loosely inserted into the screw hole through the fixing hole. And the first cover plate is movable with respect to the unit body.
The built-in type air conditioner according to claim 1.   The built-in type air conditioner according to any one of claims 1 and 2, wherein a drain pump is attached to a back surface of a second cover plate that closes the second inspection port so as to be freely opened and closed. A unit body installed behind the ceiling of the building;
A partition plate that divides the inside of the unit main body into a blower chamber in which a blower is disposed, and a heat exchange chamber in which an indoor heat exchanger is disposed;
A first inspection port provided on the side of the unit main body facing the fan chamber, and a second inspection port provided on the unit main body facing the heat exchange chamber;
An electrical component box that is detachably fitted into the first inspection port, is located in the blower chamber, and houses an electrical control component and a control board;
With
The partition plate is provided with two wiring holes for inserting a wiring connected to the electrical component box from an electrical component disposed in the heat exchange chamber ,
The two wiring holes are partially blocked at the side wall of the electrical component box,
The opening area of one of the two wiring holes is larger than the opening area of the other hole,
Features and to ruby built-ins type air conditioner that. The two hole portions for wiring have the same length dimension, and one is shifted from the first inspection port side.
The built-in type air conditioner according to claim 4. A unit body installed behind the ceiling of the building;
A partition plate that partitions the inside of the unit main body into a blower chamber in which a blower is disposed, and a heat exchange chamber in which an indoor heat exchanger is disposed;
A first inspection port provided on the side of the unit main body of the blower chamber, and a second inspection port provided on the side of the unit main body of the heat exchange chamber;
A slit provided in a side portion along the first inspection port;
An electrical control component and a control board, which have a protrusion that is detachably engaged with the slit, is fitted into the first inspection port, is screwed to the unit body, and is attached to the blower chamber. An electrical component box;
With
Further, the unit body is provided with a hooking projection,
The built-in type air conditioner further comprising: a temporary fixing hole that can be detachably and temporarily attached to the hooking protrusion on the protrusion of the electric component box. .

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