JP3900004B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner including an exhaust unit for ventilation in an indoor unit.
[0002]
[Prior art]
The separate type air conditioner has a refrigerant circuit in which an outdoor heat exchanger arranged in the outdoor unit, a compressor and an indoor heat exchanger arranged in the indoor unit, and the like are connected. While circulating a refrigerant | coolant, indoor air is introduce | transduced in an indoor unit, heat exchange with the refrigerant | coolant which passes the inside of an indoor heat exchanger is performed, and the temperature-controlled air is supplied indoors.
[0003]
Between the indoor unit and outdoor unit of the air conditioner, refrigerant piping for connecting the indoor heat exchanger and the outdoor heat exchanger, and connection wiring for transmitting power supply, air conditioning command signals, various sensor signals, etc. Etc. are connected.
[0004]
The indoor heat exchanger installed in the indoor unit functions as a refrigerant evaporator during cooling operation or dehumidifying operation, and moisture contained in the air adheres as condensed water. This condensed water is collected in a drain pan disposed below the indoor heat exchanger, and discharged to the outside by a drain hose.
[0005]
Normally, a pipe hole A as shown in FIG. 6 is provided on the wall surface to which the indoor unit is attached, and the liquid pipe B, gas pipe C, communication wiring D and drain hose E of the refrigerant pipe are connected to the indoor unit through the pipe hole A. I try to take it out of.
[0006]
In such an air conditioner, when a humidifying unit is provided adjacent to an outdoor unit and humidified air generated by the humidifying unit is supplied to the indoor unit through the indoor unit, a humidifying duct is connected from the humidifying unit to the indoor unit. There is a need to.
[0007]
As shown in the figure, when the inner diameter of the piping hole A is 60 mm (φ60), the inner diameter of the liquid pipe B is 6.4 mm (φ6.4), the inner diameter of the gas pipe C is 9.5 mm (φ9.5), and the heat insulating material If the thickness is about 6 mm, the inner diameter of the humidifying duct F needs to be set to 28 mm (φ28) and the inner diameter of the drain hose E to about 13 mm (φ13).
[0008]
[Problems to be solved by the invention]
When such an air conditioner is further provided with an exhaust unit for ventilating room air, an exhaust duct needs to be led out from the indoor unit. In the case of an air conditioner having a humidifying unit, it is necessary to further increase the inner diameter of the piping hole A and pass the exhaust duct along with other piping through the piping hole A, or to provide a piping hole for the exhaust duct. is there.
[0009]
In an air conditioner that does not include a humidifying unit, an exhaust duct can be disposed instead of the humidifying duct, and therefore, an exhaust duct having an inner diameter of 28 mm (φ28) can be disposed in the pipe hole A described above.
[0010]
When the inner diameter of the exhaust duct is 28 mm (φ28), the relationship between the wind speed in the pipe and the ventilation rate is shown in FIG. Here, considering that noise is generated as the wind speed in the pipe increases, the limit of the wind speed in the pipe is 10 m / sec. In addition, formaldehyde generated in the 14 tatami room of a newly built house is thought to be about 300 ppb at the maximum in the summer, but in order to keep it to 80 ppb, which is the Ministry of Health and Welfare standard, it is necessary to maintain a ventilation rate of 40 m ³ / h or more. . In order to satisfy such a requirement, it is necessary to increase the diameter of the exhaust duct, and it is necessary to further increase the inner diameter of the piping hole A.
[0011]
It can be considered that the drain hose E is used to exhaust air from the exhaust unit. In the configuration of an air conditioner without a humidifier unit, when the exhaust duct and drain hose are shared, the maximum inner diameter of the drain hose E that can be placed in the above-mentioned piping hole A is about 36 mm (φ36). It becomes possible to be satisfied. However, if the indoor unit pressure on the drain pan side is lower than the exhaust pressure from the exhaust unit, the drain water may flow back to the drain pan.
[0012]
As proposed in Japanese Patent Laid-Open No. 2001-82757, it is conceivable to attach a float valve to the lower end of the drain pan of the indoor unit, but by freezing in the winter or when dirt or mold adheres due to long-term use, There is a possibility that the float valve sticks to the valve seat and cannot drain.
[0013]
The present invention provides an air conditioner having an exhaust unit in an indoor unit, and allows an exhaust duct and other piping to be arranged in a common piping hole without increasing the diameter of the piping hole, and a drain. The purpose is to prevent backflow of water.
[0014]
[Means for Solving the Problems]
An air conditioner according to claim 1 of the present invention is an indoor unit that supplies indoors with temperature-adjusted air after introducing indoor air into the indoor unit and exchanging heat with the refrigerant passing through the indoor heat exchanger. An air conditioner that includes an air conditioning unit and an exhaust unit that exhausts indoor air to the outside in the indoor unit, and includes a drain inlet and a drain outlet for discharging drain water generated in the indoor air conditioning unit to the outside. A common drain duct formed integrally with a drain drain path provided, an exhaust path including an exhaust inlet and an exhaust port for discharging an exhaust air flow generated by the exhaust unit to the outside, and a common exhaust duct And a backflow prevention means for preventing a backflow of drain water to the indoor air conditioning unit side. In this air conditioner, the drain inlet is provided on the upstream side of the exhaust inlet, and the backflow prevention means is disposed between the drain inlet and the exhaust inlet. Further, the backflow prevention means constitutes a meandering path for decelerating the airflow from the exhaust inlet to the drain inlet. Further, the backflow prevention means partitions a part of the drainage path between the exhaust inlet and the drain inlet into a plurality of compartments, and is provided with a drain passage hole at one corner in the width direction of the lower end portion. A plurality of baffle plates are provided so that the positions in the width direction of the holes are alternately arranged.
[0015]
In this case, it is possible to discharge the drain water using the common discharge duct and exhaust the exhaust unit, and there is no need to increase the inner diameter of the piping hole, and the backflow prevention means can prevent the backflow of the drain water. It becomes possible.
[0016]
Further, even if the indoor air conditioning unit side becomes lower than the air pressure of the exhaust unit, the backflow prevention means can prevent the backflow of drain water.
[0017]
Further, even if the air flow generated by the exhaust unit flows to the drain inlet side, it is decelerated by the backflow prevention means that constitutes the meandering path, so that the drain water can be prevented from flowing back to the indoor air conditioning unit side.
[0018]
Moreover, since the drain drainage path is formed in a meandering state by the compartment formed by the baffle plate and the drain passage hole, the backflow of the drain water can be suppressed.
[0019]
Air conditioner according to claim 2 of the present invention is the air conditioner according to claim 1, baffle plates, air deceleration hole is provided at one of the corners of the upper end width direction, air decelerated It arrange | positions so that the width direction position of a hole may become alternate.
[0020]
In this case, the air path is formed in a meandering state by the compartment formed by the baffle plate and the air speed reducing hole, and the air flow from the exhaust unit is decelerated to prevent the backflow of the drain water.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
[Appearance structure of air conditioner]
FIG. 1 shows an external configuration of an air conditioner in which one embodiment of the present invention is employed.
[0022]
The air conditioner 1 includes an indoor unit 2 attached to an indoor wall surface and the like, and an outdoor unit 3 installed outside the room.
[0023]
An outdoor air conditioning unit such as an outdoor heat exchanger and an outdoor fan is built in the outdoor unit 3, and an indoor air conditioning unit such as an indoor heat exchanger and an indoor fan is built in the indoor unit 2. The outdoor heat exchanger of the outdoor unit 3 and the indoor heat exchanger of the indoor unit 2 are connected by a refrigerant pipe 4 to constitute a refrigerant circuit.
[0024]
The drain water generated inside the indoor unit 2 is collected and discharged to the outside from a drain discharge port 7 provided at the lower end of the drain pipe 5. An exhaust unit for ventilating room air is provided in the indoor unit 2. An exhaust path from the exhaust unit is shared with the drain pipe 5 and is configured to exhaust from an exhaust port 6 provided at an upper end portion of the drain pipe 5.
[0025]
[Indoor air conditioning unit]
An exploded perspective view of the indoor unit 2 is shown in FIG.
[0026]
In FIG. 2, the indoor unit 2 includes a front grill assembly 101 and a front panel 102 attached to the front of the front grill assembly 101. The front grille assembly 101 includes an upper suction port 103 that forms a number of slit-like openings on the upper surface thereof. Further, the front panel 102 is formed with a front suction port 104 that opens upward and laterally.
[0027]
An air purifying air filter 105 is inserted inside the upper suction port 103 of the front grill assembly 101 and the front suction port 104 of the front panel 102.
[0028]
The front grille assembly 101 is attached to the bottom frame assembly 106 located at the rear, and constitutes a casing in which internal components are housed. The casing constituted by the front grill assembly 102 and the bottom frame assembly 106 is locked to a mounting plate 107 fixed to the wall surface of the room and attached to the room.
[0029]
The bottom frame assembly 106 is provided with a fan housing portion 109 that houses the cross flow fan 12. A cross flow fan 12 is rotatably attached to the fan housing portion 109 via a bearing member 110, and an indoor fan motor 13 is provided on a side surface facing the bearing member 110. A side plate 111 is attached to the outside of the indoor fan motor 13.
[0030]
The indoor heat exchanger 11 is attached so as to surround the front, upper and rear upper portions of the cross flow fan 12. The indoor heat exchanger 11 has a large number of radiating fins attached to a heat transfer tube bent back and forth at both left and right ends, and is sucked from the upper suction port 103 and the front suction port 104 by driving the cross flow fan 12. The air thus passed is passed to the cross flow fan 12 side to exchange heat with the refrigerant passing through the heat transfer tube. The indoor heat exchanger 11 is connected to a refrigerant pipe 108 branched from the refrigerant pipe 4.
[0031]
Below the indoor heat exchanger 11, a drain pan 112 for receiving condensed water generated during heat exchange is provided. A drain hose 113 for discharging the received condensed water to the outside is attached to the drain pan 112. During the cooling operation, the indoor heat exchanger 11 acts as an evaporator, so that moisture contained in the air in contact with the indoor heat exchanger 11 is condensed and dripped. Such condensed water is received by a drain pan 112 and drained by a drain hose 113.
[0032]
An electrical component box 114 that houses a printed circuit board on which a control circuit and the like are mounted, and an electrical component lid 115 that covers the front surface of the electrical component box 114 are provided at the lower front of the front grill assembly 101. Further, an air outlet for the air flow generated by the cross flow fan 12 is provided below the electrical component box 114. At the outlet, horizontal blades 116 and 116 and a plurality of vertical blades 117 and 117 connected by a vertical blade connecting rod 118 are swingably provided. The horizontal blades 116 and 116 are rotationally driven by a horizontal blade operation motor 119, and the vertical blades 117 and 117 are rotationally driven by a vertical blade operation motor 120.
[0033]
An exhaust fan 121 is disposed on one side of the cross flow fan 12. The exhaust fan 121 includes a casing 122 that forms an exhaust passage, a fan rotor 123 that is rotatably supported in the casing 122, and an exhaust fan motor (not shown) for rotationally driving the fan rotor 123. It is a centrifugal fan and is provided at the lower part of the casing 122 with an exhaust part 124 for exhausting air.
[0034]
An exhaust inflow port 131 connected to the exhaust part 124 of the exhaust fan 121 is provided in the middle part of the drain hose 113. The drain hose 113 has a drain inlet 134 connected at one end to the drain 134 of the drain pan 112, and is located between the drain inlet 134 and the exhaust inlet 131. Backflow prevention means 132 for preventing backflow to the 112 side is provided.
[0035]
[Drain water backflow prevention means]
An example of the backflow prevention means 132 provided in the drain hose 113 is shown in FIGS.
[0036]
As illustrated, the exhaust fan 121 includes a casing 122 that forms an exhaust passage, a fan rotor 123 that is rotatably supported in the casing 122, and an exhaust fan motor 125 that rotationally drives the fan rotor 123. . In addition, the exhaust fan 121 includes an exhaust unit 124 that is located under the casing 122 and discharges air.
[0037]
The exhaust part 124 of the exhaust fan 121 is connected to the exhaust inlet 131 of the drain hose 113. In addition, one end of the drain hose 113 includes a drain inlet 133 connected to the drain part 134 of the drain pan 112. Between the drain inlet 133 and the exhaust inlet 131 of the drain hose 113, a backflow prevention means 132 for preventing the drain water from flowing backward is provided.
[0038]
The other end side of the drain hose 113 is drawn to the outside through a pipe hole 151 on the wall surface, and is connected to the drain pipe 5. An exhaust port 6 for discharging an exhaust flow discharged through the drain hose 113 to the outside is formed at the upper end portion of the drain pipe 5. Further, a drain port for discharging drain water is provided at the lower end of the drain pipe 5.
[0039]
The backflow prevention means 132 can be configured as shown in FIG. 5, for example.
[0040]
The backflow prevention means 132 includes a casing 160 that constitutes a drain path, and a plurality of baffle plates 163 that separate the inside of the casing 160 into a plurality of compartments. A drain passage hole 164 that allows passage of drain water in one side in the width direction is provided at a lower portion of the baffle plate 163, and the drain passage holes 164 of the baffle plates 163 adjacent to each other are alternately arranged in the width direction. As shown, baffle plates 163 are arranged. In the upper part of the baffle plate 163, an air reduction hole 165 for allowing air to pass in one direction in the width direction is provided. Similarly, the air reduction holes 165 of the baffle plates 163 adjacent to each other are alternately arranged in the width direction. A baffle plate 163 is arranged so as to be.
[0041]
A drain inlet 161 through which drain water flows is provided at the end of the casing 160 on the drain pan side, and a drain outlet 162 through which drain water flows out is provided at the end of the exhaust unit side.
[0042]
The drain water discharged from the drain pan enters the drain hose 113 through the drain inlet 133 and flows into the backflow prevention means 132 from the drain inlet 161. The drain water passes through each compartment through the drain passage hole 164 of the baffle plate 163, and is discharged to the outside from the drain outlet 162 through the drain hose 113 again through the drain pipe 5.
[0043]
The air flow generated by the exhaust fan 121 enters the drain hose 113 through the exhaust inlet 131 and is discharged to the outside from the exhaust port 6 provided at the upper end portion of the drain pipe 5.
[0044]
At this time, the exhaust flow from the exhaust fan 121 tends to flow also to the drain pan side of the indoor air conditioning unit, but is blocked by the baffle plate 163 provided in the backflow prevention means 132, and accordingly, the drain in the drain hose 113. It is also possible to prevent water from flowing back to the drain pan side. Even if the drain pan side has a negative pressure and a part of the exhaust flow from the exhaust fan 121 enters the backflow prevention means 132, the air speed reduction holes 165 provided in the baffle plate 163 are alternately arranged in the width direction. Therefore, the wind pressure is weakened, and the drain water can be prevented from flowing back to the drain pan.
[0045]
Thus, by sharing the drain hose 113 with the exhaust path of the exhaust fan 121, it is possible to increase the exhaust volume by increasing the inner diameter of the exhaust path, to prevent noise and to increase the ventilation volume in accordance with environmental standards. It can be realized. For example, when a drain hose E having a large inner diameter is derived using a piping hole A set to φ60 on the assumption that a humidification duct F as shown in FIG. 6 is inserted, the maximum inner diameter is 36 mm ( (In this case, the humidification duct shall not be used.) Therefore, it is possible to realize a ventilation amount in accordance with the environmental standard and prevent noise, and it is not necessary to further increase the diameter of the piping hole A.
[0046]
【The invention's effect】
In the air conditioner according to claim 1 of the present invention, it becomes possible to discharge drain water and exhaust air by using an exhaust unit using a common discharge duct, and it is not necessary to increase the inner diameter of the piping hole, and backflow prevention is achieved. By means, it becomes possible to prevent drain water backflow. Further, even if the indoor air conditioning unit side becomes lower than the air pressure of the exhaust unit, the backflow prevention means can prevent the backflow of drain water. Further, even if the air flow generated by the exhaust unit flows to the drain inlet side, it is decelerated by the backflow prevention means that constitutes the meandering path, so that the drain water can be prevented from flowing back to the indoor air conditioning unit side. Furthermore, since the drain drainage path is formed in a meandering state by the compartment formed by the baffle plate and the drain passage hole, the backflow of the drain water can be suppressed.
[0047]
In the air conditioner according to claim 2 of the present invention, the air path is formed in a meandering state by the compartment formed by the baffle plate and the air speed reducing hole, and the air flow from the exhaust unit is decelerated, so that the reverse flow of the drain water Can be prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external appearance of an air conditioner in which an embodiment of the present invention is employed.
FIG. 2 is an exploded perspective view of the indoor unit.
FIG. 3 is a sectional front view for explaining backflow prevention means.
FIG. 4 is a sectional side view for explaining a drain hose.
FIG. 5 is an explanatory diagram of backflow prevention means.
FIG. 6 is an explanatory diagram of piping holes.
FIG. 7 is a characteristic diagram showing the relationship between the inner diameter of the exhaust duct and the ventilation amount.
[Explanation of symbols]
5 Drain piping 6 Exhaust port 112 Drain pan 113 Drain hose 121 Exhaust fan 131 Exhaust inlet 132 Backflow prevention means 133 Drain inlet

Claims (2)

An indoor air conditioning unit that supplies indoors with temperature-adjusted air after introducing indoor air into the indoor unit (2) and exchanging heat with the refrigerant passing through the indoor heat exchanger (11); An air conditioner provided in an indoor unit with an exhaust unit (121) for discharging
Generated by the drain discharge path (113, 5) having a drain inlet (133) and a drain drain port (7) for discharging drain water generated in the indoor air conditioning unit to the outside, and the exhaust unit (121). A common exhaust duct (113) integrally formed with an exhaust path including an exhaust inlet (131) and an exhaust port (6) for discharging the exhaust air flow to be discharged to the outside;
A backflow prevention means (132) provided in the common discharge duct (113) for preventing a backflow of drain water toward the indoor air conditioning unit;
Equipped with a,
The drain inlet (133) is provided upstream of the exhaust inlet (131);
Backflow prevention means (132) is disposed between the drain inlet (133) and the exhaust inlet (131) ,
The backflow prevention means (132) constitutes a meandering path for decelerating the air flow from the exhaust inlet (131) toward the drain inlet (133) ,
The backflow prevention means (132) partitions a part of the drainage path between the exhaust inlet (131) and the drain inlet (133) into a plurality of compartments and at one corner in the width direction of the lower end. A drain passage hole (164) is provided, and the drain passage hole (164) includes a plurality of baffle plates (163) arranged so that the positions in the width direction are alternately arranged.
Air conditioner (1). The baffle plate (163) is provided with air speed reduction holes (165) at one corner in the width direction of the upper end, and the air speed reduction holes (165) are arranged so that the positions in the width direction are alternated.
The air conditioner according to claim 1 .

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