JPH03204528A - air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to an air conditioner in which a heater and a protection device for the heater are arranged on the leeward side of a heat exchanger (evaporator).

(b) Prior Art Conventionally, in this type of air conditioner, a heater and a blower have been arranged in sequence on the leeward side of a heat exchanger, as shown in Japanese Utility Model Publication No. 61-32262. In such an air conditioner, during cooling operation, electricity is turned off to the heater and the heat exchanger functions as an evaporator. As the blower rotates, the air that has been cooled by the evaporator is blown out from the outlet of the air conditioner through the blower while coming into contact with the heater.

Note that during heating operation, the heat exchanger acts as a condenser or the air sucked into the air conditioner is heated by energizing the heater.

(8) Problems to be Solved by the Invention In such an air conditioner, especially during cooling operation, the air whose humidity has not decreased sufficiently due to the evaporator not cooling the heater fuse or thermostat etc. When the protective device was touched, dew could form on the protective device. If dew condensation occurs in the protective device in this way, there is a risk that insulation failure of the device will occur.

The object of the present invention is to prevent dew from adhering to a heater protection device disposed on the leeward side of an evaporator.

(d) Means for Solving the Problems In order to achieve this object, the present invention is configured such that the temperature of the windward side portion of the protection device on the leeward side of the evaporator is lower than the temperature of the windward side portion of the heater. It is.

(f) Function Since the temperature of the air passing through the protective device is lower than the temperature of the air passing through the heater, dew is less likely to adhere to this device.

(F) Embodiment In FIG. 1, 1 is the main body of an integrated air conditioner, and this integrated air conditioner is composed of the main body 1 and an exterior body (described later) into which the main body 1 is inserted. There is. Reference numeral 2 denotes a bottom plate, and a stepped portion 5 is formed so that the front portion 3 is one step higher than the rear portion 4. 6 is a partition plate that can be placed on this bottom plate,
This partition plate divides the top of the bottom plate 2 into an indoor side 7 and an outdoor side 8. 9 is a fan motor; 10 is a fixing plate for the fan motor; a flange piece 12 of the fan motor 9 can be fixed to one side 11 of the plate; The leg piece 13 of this fixed plate 10 is attached to the outside surface of the partition plate 60. 14
is a reinforcing plate for this fixed plate 10, the details of which will be described later. 1
5 is one drive shaft of this fan motor 9, and a propeller fan 16 is fixed to this drive shaft 15. Reference numeral 17 denotes a slinger ring, and as the propeller fan 16 rotates, drain water accumulated in the rear part 4 of the bottom plate 2 is scooped up by the slinger ring 17 and scattered to the outdoor heat exchanger 18. 19 is a fan cover of this propeller fan 16, and its left and right pieces 20 are the left and right tube plates 2 of the outdoor heat exchanger 18.
Each is fixed at 1.

22 is an outdoor top plate, and the upper edge 23 of this fan cover 19
and covers the outdoor heat exchanger 18. A sealing material 24 is attached to the rear edge of the outdoor top plate 22.

25 is an opening provided in the partition plate 6, through which the other drive shaft 26 of the fan motor 9 projects. 27 is a centrifugal fan attached to this drive shaft 26, and 28 is a casing of this fan, in which a suction port 29 is formed in the front part and a discharge port 30 is formed in the upper part. 31 is a wire mesh that covers this discharge port 30.

And, this fan casing 28 has its flange piece 3
2 is applied to the indoor side surface 33 of the partition plate 6, and can be fixed to the partition plate 6 with screws (not shown). Here, the size of the discharge port 30 of the fan casing 28 (that is, the discharge port 30
The zero width dimension a and depth dimension b) are set to be larger than the size of the centrifugal fan 27 (that is, the diameter C and depth dimension d of the centrifugal fan 27), and the centrifugal fan 27 can be taken out from the discharge port 30. That's what I do.

34 is a piping cover, one end of which is fixed to an end 35 on the opposite nose side of the fan casing 28, and the other end fixed to the left edge 36 of the partition plate 6.

Reference numeral 37 denotes a mounting plate attached to the front part of the fan casing 28, on which a bell mouth (suction port) 38 is formed. Reference numeral 39 denotes a mounting piece formed by bending a portion of the upper part of the mounting plate backward, and has a mounting hole 40 formed therein. When the mounting plate 37 is lowered down along the front surface of the fan casing 28, the mounting holes 40 of the mounting pieces 39 are inserted into the bins 41 on the upper surface of the fan casing 2B. As a result, the mounting plate 37 is fixed to the front surface of the fan casing 28, and the bell mouth 38 faces the opening of the centrifugal fan 27. Therefore, when performing a service inspection of the centrifugal fan 27, first pull out the mounting plate 37 upward, and then attach the boss (not shown) of the centrifugal fan 27 to the drive shaft 2 of the fan motor 9.
Remove from 6.

After moving the centrifugal fan 27 a little forward (towards the indoor heat exchanger 42), the centrifugal fan 27 is pulled up from the discharge port 30 of the fan casing 28. In this way, service inspection of the centrifugal fan 27 can be easily performed.

Reference numeral 43 denotes a Styrofoam drain pan placed on the front part 3 of the bottom plate 2, and a drain port 44 faces the outdoor side 8 from a lower notch (not shown) of the partition plate 6.

Reference numeral 45 denotes a heat shielding plate placed at the rear of the drain pan, and the rising piece 46 and the rear piece 47 of this plate are attached to the drain pan 4.
Cover the rising edge 48 of 3.

Reference numeral 49 is an aluminum tape that is attached to the rising wall 50 at the corner of the drain pan 43. Therefore, a portion of the radiant heat from the electric heater (omitted in FIG. 1) attached to the front surface of the partition plate 37 is blocked by the heat shield plate 45 and the aluminum tape 49, making it difficult for it to be transmitted to the Styrofoam drain pan 43. , the drain pan 43 is seated so that it is not easily deformed by heat. The indoor heat exchanger 42 is placed on a drain pan 43. And this indoor heat exchanger 42
A refrigerant pipe 57 connected to the fan casing 28 passes around (on the left side) and is inserted into a piping hole 58 of the partition plate 6. A piping cover 3 is placed above this refrigerant pipe 57.
4 is placed.

Reference numeral 51 denotes a blowing member that can be placed above the indoor heat exchanger 42, and vertical blades 52 are arranged in a row.

53 is the indoor top plate fixed to the upper R54 of the partition plate 6,
A latching piece (fixing part) 55 is provided on the top surface.
A front panel 56 is locked to this locking piece 55. Here, when performing a service inspection of the indoor heat exchanger 42, a part of the refrigerant pipe is cut in the outdoor side 8, and the refrigerant pipe 57 extending from the indoor heat exchanger 42 is made straight. Next, when the indoor top plate 53, the blowout member 51, and the pipe cover 34 are removed, the refrigerant pipe 57 is located on the side of the fan casing 28, passing through the pipe hole 58 of the partition plate 6. Therefore, by pulling out the indoor heat exchanger 42 upward and then pulling it diagonally forward, the indoor heat exchanger 42 can be taken out without removing the fan casing 28.

59 is a flat metal fitting that connects the upper edge 54 of the partition plate 6 and the outdoor top plate 22. 60 is an electrical box, partition plate 6
is fixed to the side of the room.

61 is a compressor, which is attached to the rear part 4 of the bottom plate 2. The front panel 56 has a suction grill 62 at its lower part.
A discharge port 63 is provided at the top. 64 is a movable blade (hereinafter referred to as 1 horizontal blade) disposed at this discharge port 63
202 is an operation port provided on the side of this discharge port 63.

FIG. 2 is a perspective view showing the main body 1 with such a device (excluding the front panel 56) assembled. This second
In the figure, 65 is an exterior body of the main body 1, 200 is a bat made of polyethylene attached to the inside of this exterior body, and this bat 200 is located on the side of the compressor 61. Therefore, even if the compressor 61 tries to vibrate abnormally due to, for example, dropping the air conditioner during transportation, this vibration is regulated by the bat 200. Note that this main body 1 can be shipped even with the exterior body 65 removed. In this case, a cover is attached to the unit instead of the exterior body 65. A foamed polystyrene bat is attached to the inside of this cover, and abnormal vibrations of the compressor 61 are controlled by this bat.

During installation, this cover is removed together with the bat.

FIG. 3 is a longitudinal sectional view of this air conditioner 66, in which the exterior body 65 is attached to penetrate an indoor wall 67. Then, the main body 1 in the state shown in FIG. 2 is inserted into this exterior body 65 from the indoor side. Thereafter, as shown in FIG. 4, the lower part 68 of the front panel 56 is turned to the front, and the protruding piece 70 of the upper part 69 of the front panel 56 is allowed to engage with the locking piece 55, and the locking piece 71 of the lower part 68 is It is inserted into the receiver 72 of the bottom plate 2 and fixed. When the front panel 56 is attached in this manner, the rear edge 73 of the front panel 56 comes into contact with the front edge 74 of the exterior body 65, and the surface of this exterior body 65 and the surface of the front panel 56 coincide.

Here, attach the protruding piece 70 of the front panel 56 to the front panel 56.
A space 75 is formed around the rear edge. Space 75 like this
As shown in FIG. When the two parts are aligned, the protrusion 76 is positioned in the space 75 of the front panel 56. The front panel 56 and the exterior body 77 are flush with each other. In other words, the exterior body 77 (
(see FIG. 5), or the exterior body 65 (see FIG. 5), or the exterior body 65 (see FIG.
The front panel 56 can be attached to any of the exterior bodies (see FIG. 3).

78.79 is a heater and its heater fuse,
It is fixed to the mounting plate 37 via the support frame 201. The details will be described later. The indoor heat exchanger 42 acts as an evaporator, and the refrigerant flows as shown by the solid arrow. That is, the low-temperature refrigerant whose pressure has been reduced by a pressure reducer (not shown) first flows into the upper leeward pipe 80 and then flows through the upper part 85 in the heat exchanger 42 in an inverted U-shape to the windward pipe 8.
It will lead you to 1. The flow flows from top to bottom in this windward side pipe, and at the bottom thereof, the flow is split into two by the cheese 82, and flows in parallel through the leeward side pipe 83 and the intermediate pipe 84, and after converging at the upper part, it is compressed from this upper part. I'm trying to get back to the plane. The reason why the low-temperature refrigerant is first flowed in an inverted U-shape at the upper part 85 of the indoor heat exchanger 42 is as follows.
This is because it was desired to improve the heat exchange rate in this second part 85 compared to the heat exchange rate in the lower part 86. As a result, the air passing through the upper part 85 of the indoor heat exchanger 42 is cooled and has a lower temperature than the air 86 passing through the lower part. Therefore, the air whose temperature is kept low is supplied to the heater 78.
This allows the water to flow to the protective device (fuse) 79, making it difficult for dew to form on the protective device 79.

Therefore, poor insulation of the protection device 79 is less likely to occur, and when the heater is energized during heating operation, abnormal heating of the heater 78 can be prevented.

The rear edge 87 of the blowing member 51 is formed in an inverted U shape,
The upper edge 88 of the mounting plate 37 is fitted into the rear edge 87 of the blowing member 51. In this way, the upper part 88 of the mounting plate 37 is fixed by the blowing member 51, and the mounting plate 37 and the blowing member 51 are reliably combined, so that the air discharged from the outlet 30 of the fan casing 28 is transferred to the mounting plate 37.
7 and the blowing member 51 so as not to leak.

Further, when the main body 1 is placed in the exterior body 65, the sealing material 24 stuck to the outdoor top plate 22 approaches the rear edge 89 of the exterior body 65. The reason why the sealing material 24 is placed close to the rear edge 89 of the exterior body 65 is to prevent the air completely discharged from the outdoor heat exchanger 21 from entering the gap between the exterior body 65 and the outdoor top plate 22 as much as possible. This is to suppress it.

FIG. 6 is a perspective view showing the lower left portion of the indoor heat exchanger. Reference numeral 90 denotes an auxiliary tool having an oval shape in cross section, and is rotatably fixed to the front piece 92 of the partition plate 6 with screws 91. When the main body 1 is removed from the exterior body 65 during service inspection, the auxiliary tool 90 is turned downward (in the state shown by the dashed-dotted line).

On the other hand, after inserting the main body 1 into the exterior body 65, this auxiliary tool 9
0 horizontally and the protruding piece 93 is placed on the front edge 94 of the exterior body 65.
to engage. This prevents the main body 1 from being pulled out from the exterior body 65 carelessly. I did it this way,
For example, after inserting this main body 1 into the exterior body 65, if this main body 1 is pushed from the outdoors into the room, the main body 1 with the front panel 56 attached falls into the room. and exterior body 65
This is because the wall was penetrated through the exterior body 65, which made people unwary and unfavorable for crime prevention.

FIG. 7 is a perspective view showing the lower part 60 of the main body 1. Reference numeral 95 is a power cord extending from the electrical box, and 96 is a clamper for stopping the cord 95, which is fixed to the front side 97 or the bottom plate 2. Therefore, the f-source cord 95 is pulled from the back side 98 to the front side 97 and engaged with the clamper 96. When the main body 1 is inserted into the exterior body 65 (see FIG. 3), the front edge 74 of the exterior body 65 is located below the clamper 96. Therefore, if the power cord 95 is pulled from the back side 98 of the clamper 96 to the front side 97 and engaged with this clamper 96, and the main body 1 is inserted into the exterior body 65, the power cord 95 will be inadvertently pulled toward the front side (front panel 56 side). ), even if the clamper 96 tries to deform, this clamper 9
6 can be prevented from being deformed by the front edge 74 of the exterior body 65. Therefore, there is no risk that the power cord 95 will come off the clamper 96. Here, this t-source cord 95 is pulled out from a notch (not shown) at the bottom of the front panel 56, so even if the power cord 95 is pulled forward, there is no risk that the front panel 56 will come off. .

FIG. 8 is a perspective view showing the relationship between the horizontal blade 64 disposed at the discharge port 63 and the display frame 99 attached to the operation port 65. The horizontal blades 64 are each formed by bending a -grade sheet metal, and a space 100 is provided inside thereof. 101 is a left support made of synthetic resin, and each horizontal blade 64
(see FIG. 9). Reference numeral 102 denotes a left shaft (minus side shaft), which can be fully inserted into the left side support hole 103 of the discharge port 63. 104 is an interlocking shaft into which a notch 106 of an interlocking plate 105 is fitted. 107 is a right support made of synthetic resin,
It is inserted into the space 100 of each horizontal blade 64. Reference numeral 108 has a left axis (the other axis) and is formed into a cylindrical shape. This left axis 1
The outer diameter of the outlet 18 is set smaller than the inner diameter of the right support hole 109 of the discharge port 63. 110 is a pressing tool,
A protruding pin 111 is formed. Then, when this pressing tool 110 is pressed against the left side piece 112 of the operation port 202,
The tip of the protruding pin 111 of the protruding pin 111 is inserted into the left shaft 108 of the right support A 107 through the right support hole 109 of the discharge port 63. Thereby, the horizontal blade 64 is rotatably supported within the air outlet 63.

In this way, the left shaft 108 of the right support 107 is connected to the air outlet 63.
The protruding bottle 11 of the pressing tool 110 is pressed against the right side surface 203 of the
1, it is sufficient to form support holes 103 and 109 in the left and right side walls of the discharge port 63, respectively. Therefore, the appearance of the side wall of the air outlet 63 is improved,
By reducing the occurrence of turbulence near this side wall, the Suita Exit 63
This makes it easier to suppress dew build-up around the discharge port 63 when cold air is blown out.

Reference numeral 99 denotes a display frame that is fitted into the operation port 202, and has a projection 113 formed on its left side, an engagement piece 114 formed on its upper piece, and a fixing piece 115 formed on its lower piece.

Then, while fitting the engaging piece 114 into the protrusion 210 (see FIG. 10) on the upper back side of the front panel 56, the fixing piece 115 is fixed to the lower back side of the front panel 56 with a screw. Here, the distance X between the engaging pieces 114 is matched with the distance between the protrusions 210.

Therefore, with the engaging pieces 114 of the display frame 99 fitted into the projections 210, the display frame 99 is positioned at the operation port 65 of the front panel 56. Then, by fixing the fixing piece 115 to the lower back side of the front panel 56 with a screw,
The protrusion 113 hits the pressing tool 110, and this pressing tool 110
prevents it from coming off.

FIG. 11 is a sectional view showing the relationship between the partition plate 6, the fan motor 9, the fixing plate 10 of the fan motor, and the reinforcing plate 14. Reference numeral 116 indicates the space between the fan motor 9 and the opening 25 of the partition plate 6. It is a cushion rubber provided. and reinforcement plate 1
The lower end 117 of 4 is fixed to the bottom plate, and the upper end 118 of 4 is fixed to the fixed plate 10. In this way, the partition plate 6 to which the fan motor 9 is attached and the bottom plate 2 are connected by the reinforcing plate 14, so vibrations generated when the fan motor 9 rotates are received by the partition plate 6 and the bottom plate 2, and the partition plate The vibration of the fan motor 9 is not transmitted only to the fan motor 6. Thereby, the vibration of the partition plate 6 can be reduced, and the partition plate 6 can be made thinner. In particular, this partition plate 6 is
It is a relatively large member because it divides the top into an indoor side 7 and an outdoor side 8, and by reducing the thickness of this partition plate 6, the cost of this partition plate 6 can be reduced.

FIGS. 12 and 13 are front views showing the relationship between the centrifugal fan 27 and the fan casing 2B, as well as characteristic diagrams of air volume and rotation speed. The diameter e of the centrifugal fan 27 is 180 m1.
l, its center 119 is 8 dimensions (71
111) Since the centrifugal fan 27 is moved closer to the nose portion 121 of the fan casing 28 in the fan casing, the gap between the nose portion 121 and the centrifugal fan 27 is approximately 11 m. became.

(Incidentally, when the center of the centrifugal fan 122 is aligned with the center 120 of the fan casing 28, the dimension of the gap between the nose portion 121 and the centrifugal fan 121 is approximately 201111).
In FIG. 13, the center 119 of this centrifugal fan 27
The solid line shows the relationship between the rotational speed of the centrifugal fan 270 and the air volume when the center 12G of the centrifugal fan 122 and the center 12G of the fan casing 28 are shifted (embodiment of the present invention). The broken line shows the relationship between the rotational speed of the centrifugal fan 122 and the air volume when they match (the state shown by the broken line in FIG. 12). According to this, when the center 119 of the centrifugal fan 27 and the center 120 of the fan casing 28 are shifted (solid line), at the same rotation speed, the difference is 0.2% lower than when the centers of the two are aligned (broken line).
5XIQQcm" air volume increased. This is due to the center 119 of the centrifugal blower 27 and the center 120 of the fan casing 2B.
If the nose part 121 and the centrifugal air blower [2
This is presumably because the size of the gap between fan casing 28 and fan casing 7 has become smaller, making it difficult for air blown out from outlet 30 of fan casing 28 to be sucked into this gap.

FIG. 14 is a plan view showing the relationship between the rear grill 123 of this air conditioner 66 and the unit 1, where 124 is a suction column connected to the suction port, 125 is a discharge column located behind the outdoor heat exchanger 18, In particular, both ends 1 adjacent to the suction column 124
26 is inclined inward at an angle θ (45° ±2°). Since the inclination was allowed in this way, both ends 1 of the discharge column 125
The outdoor air discharged from 26 flows as shown by the solid arrow,
Air shorts in which discharged air is sucked into the air conditioner 66 via the suction column 124 are prevented as much as possible.

In FIG. 15, 127 is a heater member fixed to the front surface of the mounting plate 37, and this member consists of a support frame 201 fixed to the mounting plate 37, and a heater 78 arranged in a meandering manner on this support frame 201. It is configured. A thermostat 128 is one of the protection devices for the heater 78. The heater 78 and the support frame 201 are supported at their intersections. In particular, the central piece 129 of the support frame 201 prevents the heater 78 from sagging. Moreover, the upper part 130 of this center piece 129 is bent to the right (in FIG. 15), and this upper part 130 also serves as a fixing part 131 for one end of the fuse 79 of the heater 78. In other words, the central piece 12 provided to prevent the heater 7B from sagging.
Since the upper part 130 of the bell mouth 38 is bent to the right side in order to serve as a fixing part of the fuse 79, this bending eliminates the central piece 129 near the central upper part 132 of the bell mouth 38, reducing the ventilation resistance of this part 132. This suppressed the decrease in suction air volume to a small level.

(G) Effects of the Invention As described above, according to the present invention, on the leeward side of the evaporator, the temperature on the windward side of the protective device is lower than the temperature on the windward side of this heater, so that dew does not reach the protective device. This makes it difficult for the material to adhere, thereby reducing the occurrence of insulation defects in this device.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of an integrated air conditioner showing an embodiment of the present invention, Figure 2 is a perspective view of the unit with the front panel removed, Figure 3 is a vertical sectional view of the unit, and Figure 4. is an explanatory diagram showing the installation state of the front panel of the aircraft, Figure 5 is a vertical sectional view of the main part showing the different installation states of the front panel, and Figure 6 shows the relationship between the exterior body of the aircraft and auxiliary equipment. A perspective view of the main parts of the aircraft; Figure 7 is a lower perspective view of the aircraft showing the installation state of the t-source hood;
Figure 8 is an exploded perspective view of the discharge port of the same machine, Figure 9 is an enlarged view of the main parts of Figure 8, Figure 10 is a perspective view of a part of the back of the front panel, and Figure 11 is this air conditioner. 12 is an explanatory diagram showing the relationship between the centrifugal fan of the same machine and the casing, and Figure 13 is the relationship between the rotation speed and the discharge air volume of the centrifugal fan of the same machine. FIG. 14 is a sectional view of the rear grill of the aircraft, and FIG. 15 is an elevational view of a heater member attached to the aircraft. 27...Blower, 42...Indoor heat exchanger, 78
... Heater, 79,128 ... Protective device.

Claims (1)

[Claims] 1) In an air conditioner equipped with a blower, an evaporator, a heater disposed on the leeward side of the evaporator, and a protection device for the heater, the temperature of the upwind portion of the protection device in the evaporator is controlled. An air conditioner characterized in that the temperature is lower than the temperature of the leeward side portion of the heater.