JP5199041B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner including a heat exchanger in an indoor unit body.

  There is an air conditioner including a heat exchanger formed of aluminum or an aluminum alloy that is lightweight, has high thermal conductivity, and is easily processed by various plastics.

For example, in Patent Document 1, a pipe formed of aluminum or an aluminum alloy is used as a refrigerant pipe of a heat exchanger, and copper or a copper alloy is formed in a refrigerant pipe connecting the heat exchangers or between the heat exchanger and the compressor. An air conditioner using such a pipe is disclosed.
Japanese Patent Laid-Open No. 06-300303

  By the way, the heat exchanger includes a parallel flow type and a fin and tube type. A parallel flow heat exchanger having corrugated fins between flat refrigerant pipes has poor drainage due to its structure. Therefore, for example, during cooling operation or dehumidifying operation, that is, when using a heat exchanger mounted in an indoor unit as an evaporator, water droplets generated by condensation adhere to the heat exchanger, and the adhered water droplets are blown by the blower. There is a problem that the air is blown into the room from the air outlet.

  The fin-and-tube heat exchanger has poor drainage when the angle with respect to the horizontal plane is small. Therefore, for example, at the time of cooling operation or dehumidifying operation, water droplets generated by condensation may adhere to the heat exchanger, and the adhered water droplets may be blown out from the outlet through the blower into the room.

  An object of this invention is to provide the air conditioner which has arrange | positioned the heat exchanger so that the water drop which generate | occur | produced with the heat exchanger may be sucked into a blower in view of the said problem.

  In order to achieve the above object, in the present invention, a blower, a first heat exchanger, and a second heat exchanger smaller than the first heat exchanger are provided in an air passage extending from an air inlet of the indoor unit body to an outlet. In the air conditioner, the first heat exchanger, the second heat exchanger, and the blower are arranged in the air passage from the upstream side in the air flow direction, and the second heat exchanger is The water droplets generated in the first heat exchanger are disposed so as to be prevented from being sucked into the blower.

  According to the above configuration, since the second heat exchanger is arranged downstream of the first heat exchanger in the air flow direction, water droplets are generated in the first heat exchanger, and the water droplets are sucked toward the outlet. Even if this is likely to happen, it is blocked by the second heat exchanger. Therefore, it is possible to prevent water droplets from being blown into the room from the outlet.

As a specific example, the indoor unit main body is formed in a shape that is longer in the front-rear direction than in the height direction. An air inlet is formed on the top surface of the indoor unit main body, and an air outlet is formed on the front surface of the indoor unit main body . An air passage extending from the air inlet to the air outlet is formed inside the indoor unit main body, and a blower is provided in the air ventilation path. The first heat exchanger is disposed so as to face the intake port, and is provided so as to be inclined so that the rear end is lower than the front end, and the second heat exchanger is generated by the first heat exchanger. In order to prevent water droplets from being sucked into the blower, the second heat exchanger is provided on the front side near the lower side of the first heat exchanger so that the inclination angle is larger than the first heat exchanger with respect to the horizontal plane. The front end of the first heat exchanger is close to the lower side of the front end of the first heat exchanger, the rear end of the second heat exchanger is located away from the rear end of the first heat exchanger, and the second heat exchanger It arrange | positions so that a suction part may be covered.

  The first heat exchanger, the second heat exchanger, and the blower are arranged in the order of the first heat exchanger, the second heat exchanger, and the blower from the upstream side in the air flow direction. The second heat exchanger is disposed so as to prevent water droplets generated by the first heat exchanger from being sucked into the blower.

  The air sucked from the intake port passes through the first heat exchanger and the second heat exchanger in this order, and is blown out from the outlet. The air sucked from the intake port is heat-exchanged in each of the first heat exchanger and the second heat exchanger. For example, when the cooling and dehumidifying operation is performed, the air sucked from the air inlet is cooled and dehumidified by the first heat exchanger and the second heat exchanger and then blown out from the air outlet.

  According to the said structure, the quantity of the water droplet produced | generated by the dew condensation by cooling dehumidification differs in a 1st heat exchanger and a 2nd heat exchanger. Specifically, since air sucked from the air inlet is first cooled and dehumidified by the first heat exchanger, the air flowing to the second heat exchanger does not contain much moisture. For this reason, even if the second heat exchanger is cooled and dehumidified, water droplets due to condensation are not generated so much, and water droplets are hardly generated and attached to the second heat exchanger.

  For example, the blower is located in front of the first heat exchanger and the second heat exchanger. That is, the blower is disposed near the outlet. According to this configuration, the blower blows out the heated or cooled dehumidified air vigorously from the outlet. Thereby, the air conditioner can strongly heat, cool, and dehumidify the room.

  Since the blower is positioned on the front side of the first heat exchanger and the second heat exchanger, the size in the height direction can be reduced. That is, the indoor unit body can be made more compact in the height direction than the conventional indoor unit body.

  For example, the first heat exchanger and the second heat exchanger are provided so as to be inclined so that the rear end is lower than the front end on the blower side. As a result, water droplets generated by condensation during cooling and dehumidification are likely to flow downward without adhering to the surface. Therefore, it can prevent more that a water droplet continues adhering to a 1st heat exchanger and a 2nd heat exchanger.

  By providing the first heat exchanger in an inclined manner, the indoor unit main body can be prevented from becoming long in the front-rear direction. In other words, when the first heat exchanger is formed so as to be able to strongly dehumidify the room, it is shorter in the front-rear direction to be inclined in the front-rear direction than to be horizontally disposed in a position facing the air inlet. It can be made more compact than a conventional indoor unit.

  Since the second heat exchanger receives water droplets generated by the first heat exchanger, it is necessary to reliably flow the water droplets. Therefore, it is preferable that the second heat exchanger is provided with a larger inclination angle with respect to the horizontal plane than the first heat exchanger. Thereby, since a water droplet is drained through a 2nd heat exchanger, it can prevent that a water droplet blows off indoors from a blower outlet.

  A drain pan that collects water droplets and discharges them outside is provided on the lower surface of the indoor unit main body. The rear end of the first heat exchanger may be positioned near the rear end of the drain pan, and the rear end of the second heat exchanger may be positioned near the front end of the drain pan. With this configuration, water droplets generated in the first heat exchanger and the second heat exchanger can be reliably guided to the drain pan.

  The first heat exchanger is a parallel flow type, and the second heat exchanger is a fin-and-tube type including a plurality of heat transfer fins parallel to each other, and the length direction of the heat transfer fins is that of the indoor unit main body. You may make it arrange in the front-back direction.

  According to the said structure, a 2nd heat exchanger is inclined and provided so that a rear side end may become lower than the front side end by the side of the said fan. Therefore, the heat transfer fins provided in parallel along the front-rear direction of the indoor unit body are provided toward the lower surface of the indoor unit body. Therefore, water droplets generated in the second heat exchanger are likely to flow down to the lower surface of the indoor unit main body, that is, the drain pan through the heat transfer fins.

  According to the present invention, the second heat exchanger is located between the first heat exchanger and the blower, and is arranged to prevent water droplets generated in the first heat exchanger from being sucked into the blower. The water droplets generated in the first heat exchanger are surely blocked by the second heat exchanger. That is, it is possible to prevent water droplets generated in the first heat exchanger from blowing out into the room.

  Hereinafter, an example of the air conditioner of the present invention will be described in detail. Note that the air conditioner of the present embodiment is a separate air conditioner that performs cooling operation, heating operation, dehumidifying operation, and reheat dehumidifying operation.

  The air conditioner of this embodiment is greatly different from the conventional air conditioner in the arrangement configuration of the indoor unit side blower 6 and the plurality of indoor unit side heat exchangers 7 and 8 in the indoor unit body 1. Specifically, conventionally, a plurality of indoor unit side heat exchangers are arranged so as to surround the indoor side blower, but in the present embodiment, the indoor unit side blower 6 includes the indoor unit side heat exchanger 7, It is located in front of 8. Thereby, the indoor unit main body 1 of this embodiment is made into the flat shape with a low height and depth compared with the conventional indoor unit main body.

  As in the above configuration, the indoor unit body 1 has a flat shape that is wide in the left-right direction and deep, so that the indoor unit-side heat exchangers 7 and 8 are arranged upstream in the air flow direction. The shape of the first heat exchange 7 can be formed into one large plate. Thereby, it becomes possible to improve heat exchange efficiency.

  Next, a specific best mode of the air conditioner according to the present embodiment will be described with reference to FIGS.

  The air conditioner of this embodiment is provided with the indoor unit main body 1 and the outdoor unit main body 2 as shown in FIG. As shown in FIG. 1, an air inlet 3 for sucking indoor air is formed on the top surface of the indoor unit main body 1, and an air outlet from which air heated, cooled, dehumidified, and reheat dehumidified is blown out on the front surface. 4 is formed.

  The inlet 3 is provided with a filter 5 that removes dust contained in the sucked air (see FIG. 2). The filter 5 is provided with a filter cleaning device (not shown) for cleaning dust adhering to the surface.

  A louver 9 that swings the flow direction of the blown air up and down is attached to the air outlet 4 in a swingable manner. The louver 9 operates quickly when the air-conditioning air flow is turned off, and enters a closed state in which the outlet 4 is closed as shown in FIG. That is, the louver 9 functions as an open / close panel for the air outlet 4.

  As shown in FIGS. 2 and 3, the indoor unit main body 1 includes an indoor unit side blower 6, a first heat exchanger 7 and a second heat exchanger 8, which are indoor unit side heat exchangers, an electromagnetic valve 10, and an indoor unit. A drain pan 12 for collecting water droplets generated in the machine main body 1 and discharging them to the outside is provided.

  The indoor unit body 1 is formed with a ventilation path through which the air sucked between the air inlet 3 and the air outlet 4 flows. On this ventilation path, the filter 5, the first heat exchanger 7, the second heat exchanger 8, and the indoor unit side blower 6 are arranged in this order, with the intake port 3 side as the upstream side in the air flow direction.

  The indoor unit side blower 6 is located on the front side in the front-rear direction of the indoor unit body 1 with respect to the first heat exchanger 7 and the second heat exchanger 8 and is disposed between the second heat exchanger 8 and the outlet 4. The The indoor unit side blower 6 forms an air flow by a rotating fan. Specifically, when the fan of the indoor unit side blower 6 rotates, air is sucked from the intake port 3 and passes through the first heat exchanger 7 and the second heat exchanger 8 in this order along the ventilation path. The air sucked from the intake port 3 exchanges heat with the refrigerant passing through the first heat exchanger 7 and the second heat exchanger 8.

  Note that the air is heated, cooled or dehumidified depending on the state of the refrigerant. Thereby, the room can be heated, cooled, dehumidified, or reheat dehumidified.

  The first heat exchanger 7 is a parallel flow type formed in a single plate shape. Specifically, the first heat exchanger 7 includes a pair of header pipes arranged in parallel along the front-rear direction of the indoor unit body 1 and a plurality of parallel refrigerants arranged between the header pipes and parallel to each other. It is a side flow type parallel flow type heat exchanger provided with the pipe | tube 24 and the corrugated fin 26 arrange | positioned between refrigerant | coolant pipe | tubes.

  Instead of the side flow type, a down flow type parallel flow type heat exchanger may be used. Alternatively, a fin-and-tube heat exchanger may be used. However, a parallel flow heat exchanger provided with corrugated fins generally has better heat exchange efficiency than a fin-and-tube heat exchanger, but has poor drainage when used as an evaporator.

  The second heat exchanger 8 is a fin-and-tube type formed in a single plate shape. Specifically, the second heat exchanger 8 includes a plurality of heat transfer fins 27 that are arranged in parallel to each other along the front-rear direction of the indoor unit body 1 and a plurality of parallel to each other that penetrate between the heat transfer fins 27. And a refrigerant pipe.

  The fin-and-tube heat exchanger has better drainage than the parallel flow heat exchanger. For example, if the fin-and-tube heat exchanger has an angle of 45 degrees or more with respect to the horizontal plane, the fin-and-tube heat exchanger is generated on the heat transfer fin 27 The water droplets that flow down through the heat transfer fins 27 are not blown off by the air blowing. That is, it is important to set the angle at which water drops flow down through the heat transfer fins 27. Therefore, the second heat exchanger 8 that is a fin-and-tube heat exchanger is arranged with an angle at which water droplets do not scatter on the indoor unit side blower 6 side with respect to the horizontal plane.

  The refrigerant passes through the header pipe and refrigerant pipe 24 of the first heat exchanger 7 and the refrigerant pipe 25 of the second heat exchanger 8. In the first heat exchanger 7 and the second heat exchanger 8, the refrigerant exchanges heat with the air sucked from the intake port 3 by the indoor unit side blower 6 described later. Thereby, the room in which the indoor unit body 1 is arranged is heated, cooled and dehumidified, or reheated and dehumidified. Whether heating, cooling dehumidification, or reheat dehumidification is performed depends on the state of the refrigerant flowing in the indoor unit side heat exchangers 7 and 8.

  The first heat exchanger 7 is larger than the second heat exchanger 8 and is made of aluminum or an aluminum alloy. The first heat exchanger 7 is disposed at a position facing the intake port 3. In addition, the first heat exchanger 7 has the indoor unit body 1 such that the other end side (the front and rear direction rear end of the indoor unit body) is lower than the one end side (the front and rear direction front end of the indoor unit body). It is arranged so as to be inclined as viewed from the side cross section. Further, the first heat exchanger 7 is disposed such that the other end side is positioned in the vicinity of the rear end in the front-rear direction of the indoor unit body 1 of the drain pan 12.

  The second heat exchanger 8 is disposed between the first heat exchanger 7 and the indoor fan 6. Specifically, the second heat exchanger 8 is configured so that the other end side (the rear end in the front-rear direction of the indoor unit main body) is lower than the one end side (the front-rear front end of the indoor unit main body). It is arranged so as to be inclined as viewed from the side cross section. The second heat exchanger 8 is disposed so that one end side thereof is positioned in the vicinity of one end side of the first heat exchanger 7 and the other end side thereof is positioned in the vicinity of the front end in the front-rear direction of the indoor unit body 1 of the drain pan 12. Is done. It should be noted that the second heat exchanger 8 is disposed at a more inclined angle than the first heat exchanger 7.

  By arranging the first heat exchanger 7 and the second heat exchanger 8 at an angle in this way, water droplets generated during cooling dehumidification and reheat dehumidification are generated by corrugated fins 26 and second of the first heat exchanger 7. It flows down through the heat transfer fins 27 of the heat exchanger 8 and is guided to the drain pan 12 provided on the lower surface in the indoor unit body 1.

  The electromagnetic valve 10 is a flow rate adjusting unit that adjusts the flow rate of the refrigerant that passes between the first heat exchanger 7 and the first heat exchanger 8. In this embodiment, the solenoid valve 10 uses a solenoid valve having a gap through which the refrigerant can pass even when closed.

  When the solenoid valve 10 is closed, the refrigerant is decompressed in the solenoid valve 10. When the solenoid valve 10 is open, the refrigerant flows to the second heat exchanger 8 without being decompressed.

  The drain pan 12 is a tray for collecting water droplets (condensed water) generated in the indoor unit body 1 during the cooling operation, the dehumidifying operation, and the reheat dehumidifying operation. The drain pan 12 includes a drain port 12a for draining the collected water. The bottom surface of the drain pan 12 is inclined toward the rear side in the front-rear direction of the indoor unit body 1 so that the collected water flows to the drain port 12a. The drain port 12 a is formed at the rear end in the depth direction of the drain pan 12. In addition, the water drained from the drain port 12a flows through the drainage channel to the drain pan on the outdoor unit main body 2 side. Alternatively, it is drained outside.

  The outdoor unit 2 includes a compressor 13, a four-way switching valve 14, an outdoor unit side heat exchanger 15, a flow control valve (expansion valve) 16, an accumulator 17, an outdoor unit side blower 18, and an outdoor unit temperature sensor 19. . The outdoor unit temperature sensor 19 is attached to the outer surface of a pipe that guides the refrigerant of the outdoor unit side heat exchanger 15, and detects the temperature of the refrigerant.

  The compressor 3 compresses the refrigerant gas and sends it out as a high-temperature and high-pressure refrigerant gas. The four-way switching valve 14 is for sending the refrigerant from the compressor 3 to a required route. Specifically, the refrigerant sent out from the compressor 3 is changed by the four-way switching valve 14 in accordance with any one of heating operation, cooling operation, dehumidification operation, and reheat dehumidification operation. 15 or the required route of the second heat exchanger 8. Further, the four-way switching valve 14 sends the refrigerant that has returned from the indoor unit body 1 to the outdoor unit body 2 to the accumulator 17. The accumulator 17 separates the refrigerant into a gas refrigerant and a liquid refrigerant, and returns only the gas refrigerant to the suction port of the compressor 3.

  The flow control valve 16 adjusts the flow rate of the refrigerant passing between the outdoor unit side heat exchanger 15 and the first heat exchanger 7. The flow control valve 16 is fully opened in a reheat dehumidifying operation described later. That is, the opening degree becomes the maximum value.

  The outdoor unit side blower 18 forms an air flow by a rotating fan. The air sucked into the outdoor unit main body 2 by the outdoor unit side blower 18 passes through the outdoor unit side heat exchanger 15. The refrigerant in the outdoor unit side heat exchanger 15 exchanges heat with the air sucked by the outdoor unit side blower 16, but is heated or cooled and dehumidified according to the state of the refrigerant. The refrigerant circulating through the indoor unit main body 1 and the outdoor unit main body 2 passes through the refrigerant pipe 20.

  The air conditioner has a controller 100 as a control device. The controller 100 controls each device of the air conditioner. The controller 100 is connected to a device to be controlled. The controller 100 is connected to the indoor temperature sensor 21 and the outdoor unit temperature sensor 19 and receives temperatures detected from the indoor temperature sensor 21 and the outdoor unit temperature sensor 19. The controller 100 includes a calculation unit and a storage unit. The controller 100 performs various data processing necessary for controlling the operation of the air conditioner.

  When the operation panel is operated by the user, the controller 100 recognizes whether the heating operation, the cooling operation, the dehumidifying operation, or the reheat dehumidifying operation is selected, and the selected operation is performed. Control the operation of each device.

  The controller 100 receives indoor air temperature data that can identify the indoor air temperature detected by the indoor temperature sensor 21. The controller 100 receives outdoor unit refrigerant temperature data that can identify the refrigerant temperature of the outdoor unit side heat exchanger 15 detected by the outdoor unit temperature sensor 19.

  Based on the comparison result between the indoor air temperature data and the outdoor unit refrigerant temperature data, the controller 100, as will be described later, the indoor unit side blower 6, the electromagnetic valve 10, the compressor 13, the flow rate control valve 16, the outdoor unit side. The blower 18 is controlled.

  In the present embodiment, the controller 100 is separated from the indoor unit main body 1 and the outdoor unit main body 2 and provided outside the air conditioner. However, the present invention is not limited to this, and the interior of the indoor unit main body 1 and the outdoor unit are not particularly limited. It may be located in either one of the main bodies 2. Or you may divide and arrange | position to both.

  Next, the operation | movement of the various driving | operation of an air conditioner is demonstrated using FIG. In FIG. 3, the broken arrow direction indicates the direction in which the refrigerant flows during the heating operation, and the solid arrow direction indicates the direction in which the refrigerant flows during the cooling operation and the dehumidifying operation.

  First, the operation of the heating operation will be described. When the user operates the operation panel to perform the heating operation, the controller 100 recognizes that the air conditioner has been set for the heating operation, and causes the refrigerant to flow in the direction indicated by the broken line arrow in FIG. The controller 100 sets the state of the four-way switching valve 14.

  The refrigerant is sent out in a high-temperature and high-pressure gas state from the compressor 3 and passes from the outdoor unit main body 2 to the indoor unit main body 1 through the four-way switching valve 14 and the refrigerant pipe 20. The refrigerant that has entered the indoor unit body 1 passes through the first heat exchanger 7, the electromagnetic valve 10, and the second heat exchanger 8 in this order. At this time, the electromagnetic valve 10 is in an open state.

  When the refrigerant passes through the first heat exchanger 7 and the second heat exchanger 8, the refrigerant exchanges heat with the air sucked by the indoor unit side blower 6, and condenses and liquefies. Thereby, indoor air is heated and heating is performed.

  The refrigerant that has passed through the second heat exchanger 8 passes through the refrigerant pipe 20, reaches the outdoor unit main body 2 from the indoor unit main body 1, and passes through the flow control valve 16. The flow rate of the refrigerant is adjusted according to the opening degree of the flow control valve 16 and reaches the outdoor unit side heat exchanger 15. When the refrigerant passes through the outdoor unit side heat exchanger 15, it exchanges heat with the air sucked by the outdoor unit side blower 18, and evaporates and vaporizes.

  The refrigerant reaches the accumulator 17 through the four-way switching valve 14 after passing through the outdoor unit-side heat exchanger 15. The refrigerant that has reached the accumulator 17 is separated into a gas refrigerant and a liquid refrigerant. Thereafter, only the gas refrigerant flows from the accumulator 17 to the compressor 13.

  Next, the cooling operation and the dehumidifying operation of the air conditioner 25 will be described. In both the cooling operation and the dehumidifying operation, the heat exchange operation in the heat exchange is cooling dehumidification.

  When the user operates the operation panel to perform the cooling operation or the dehumidifying operation, the controller 100 recognizes that the air conditioner has been set to the cooling operation or the dehumidifying operation, and moves the refrigerant to the direction of the solid arrow in FIG. The controller 100 sets the state of the four-way switching valve 14 so that it flows in the flow.

  The refrigerant is sent out in a high-temperature and high-pressure gas state from the compressor 3, passes through the four-way switching valve 14, and reaches the outdoor unit-side heat exchanger 15. When passing through the outdoor unit side heat exchanger 5, the refrigerant exchanges heat with the air sucked by the outdoor unit side blower 18, and condenses and liquefies.

  The refrigerant reaches the flow control valve 16 after passing through the outdoor unit side heat exchanger 15. The flow rate of the refrigerant is adjusted according to the opening degree of the flow control valve 16, passes through the refrigerant pipe 20, and reaches the indoor unit body 1 from the outdoor unit body 2. The refrigerant that has entered the indoor unit body 1 passes through the second heat exchanger 8, the electromagnetic valve 10, and the first heat exchanger 7 in this order. At this time, the solenoid valve 10 is open.

  When the refrigerant passes through the first heat exchanger 7 and the second heat exchanger 8, the refrigerant exchanges heat with the air sucked by the indoor unit side blower 6 to evaporate and vaporize. As a result, the indoor air is cooled and dehumidified to perform cooling and dehumidification.

  At this time, water droplets are generated on the surfaces of the first heat exchanger 7 and the second heat exchanger 8 due to condensation. The generated water drops flow down through the corrugated fins 26 of the first heat exchanger 7 and the heat transfer fins 27 of the second heat exchanger 8, that is, to the other end side of the heat exchangers 7 and 8. Water droplets generated in the first heat exchanger 7 reach the back wall 28 of the indoor unit body 1 and flow down to the drain pan 12 along the back wall 28. Alternatively, the air is sent to the second heat exchanger 8 together with the cooled and dehumidified air. When water droplets are blown together with the cooled and dehumidified air, the second heat exchanger 8 blocks the water droplets. The water droplets blocked by the second heat exchanger 8 flow down to the drain pan 12 through the heat transfer fins 27. Moreover, the water droplet generated in the second heat exchanger 8 flows down to the drain pan 12 as it is (see FIG. 2).

  In addition, the 2nd heat exchanger 8 is arrange | positioned so that the suction part of the indoor air blower 6 may be covered. In other words, the second heat exchanger 8 is disposed so that the air dehumidified from the first heat exchanger 7 always passes through the second heat exchanger 8. As a result, even if water droplets are scattered from the first heat exchanger 7, the water droplets are received by the second heat exchanger 8, so that the water droplets do not reach the indoor blower 6 directly from the first heat exchanger 7.

  There may be a slight gap between the lower portion of the second heat exchanger 8 and the drain pan 12. However, this gap needs to be within a range in which water drops falling from the lower part of the second heat exchanger 8 can fall onto the drain pan 12 before being sucked into the indoor unit side blower 6. Normally, if there is a gap between the lower part of the second heat exchanger 8 and the drain pan 12, water drops that have traveled through the second heat exchanger 8 fall between the lower part of the second heat exchanger 8 and the drain pan 12. Is sucked into the indoor unit side blower 6. However, if the water drops falling from the lower part of the second heat exchanger 8 can be dropped into the drain pan 12 before being sucked into the indoor unit side fan 6, the water drops are sucked into the indoor unit side fan 6. The problem that is solved is solved.

  The refrigerant that has passed through the first heat exchanger 7 passes from the indoor unit main body 1 to the outdoor unit main body 2 through the refrigerant pipe 20. The refrigerant that has entered the outdoor unit main body 2 passes through the four-way switching valve 14 and reaches the accumulator 17. The refrigerant that has entered the accumulator 17 is separated into a gas refrigerant and a liquid refrigerant. Thereafter, only the gas refrigerant flows from the accumulator 17 to the compressor 13.

  Next, the reheat dehumidification operation of the air conditioner will be described. When the user operates the operation panel to perform the reheat dehumidifying operation, the controller 100 recognizes that the air conditioner has been set for the reheat dehumidifying operation, and causes the refrigerant to flow in the direction of the solid arrow in FIG. As described above, the controller 100 sets the state of the four-way switching valve 14.

  The refrigerant is sent out from the compressor 3 in a high-temperature and high-pressure gas state, passes through the four-way switching valve 14, and reaches the outdoor unit-side heat exchanger 15. When passing through the outdoor unit side heat exchanger 5, the refrigerant exchanges heat with the air sucked by the outdoor unit side blower 18, and condenses and liquefies.

  The refrigerant reaches the flow control valve 16 after passing through the outdoor unit side heat exchanger 15. At this time, the flow control valve 16 is fully open. The refrigerant that has passed through the flow control valve 16 passes from the outdoor unit main body 2 to the indoor unit main body 1 through the refrigerant pipe. The refrigerant that has entered the indoor unit main body 1 reaches the second heat exchanger 8, and when passing through the second heat exchanger 8, the refrigerant exchanges heat with the cooled and dehumidified air to condense and liquefy. Thereby, the sucked air is heated.

  Next, the refrigerant reaches the electromagnetic valve 10 from the second heat exchanger 8. At this time, the solenoid valve 10 is in a closed state. The refrigerant that has entered the solenoid valve 10 expands to a low pressure state. Thereafter, the refrigerant reaches the first heat exchanger 7 and vaporizes by exchanging heat with the air sucked from the intake port 3. Thereby, the sucked air is dehumidified and cooled. In this manner, the air that has been cooled and dehumidified by the first heat exchanger 7 is heated by the second heat exchanger 8 to perform reheat dehumidification.

  During the reheat dehumidifying operation, water droplets are generated on the surface of the first heat exchanger 7 due to condensation as in the cooling operation and the dehumidifying operation. The generated water drops flow down along the corrugated fins 26 of the first heat exchanger 7, that is, to the other end side of the first heat exchanger 7. Water droplets generated in the first heat exchanger 7 reach the back wall 28 of the indoor unit body 1 and flow down to the drain pan 12 along the back wall 28. Alternatively, the air is blown to the second heat exchanger 8 together with the cooled and dehumidified air (see FIG. 2).

  At this time, when water droplets are blown together with the cooled and dehumidified air, the second heat exchanger 8 blocks the water droplets. The water droplets blocked by the second heat exchanger 8 flow down to the drain pan 12 through the heat transfer fins 27.

  The refrigerant that has passed through the first heat exchanger 7 passes from the second heat exchanger 8 to the outdoor unit 2 through the refrigerant pipe 20. The refrigerant that has entered the outdoor unit main body 2 passes through the four-way switching valve 14 and reaches the accumulator 17. The refrigerant that has entered the accumulator 17 is separated into a gas refrigerant and a liquid refrigerant. Thereafter, only the gas refrigerant flows from the accumulator 17 to the compressor 13.

  Thereby, the air conditioner is positioned so that the second heat exchanger 8 is located downstream of the first heat exchanger 7 in the air flow direction and closes the air passage to the blower, whereby the first heat exchange is performed. Even if water droplets generated in the vessel 7 are caused to flow together with air, the second heat exchanger 8 can reliably block the water droplets.

  Moreover, by providing the 1st heat exchanger 7 and the 2nd heat exchanger 8 inclining, the generated water droplet can be guide | induced to the drain pan 12 of the lower surface in the indoor unit main body 1 along each fin. Therefore, even if water droplets are generated and adhered to each of the heat exchangers 7 and 8, it can be prevented from being blown out into the room.

  Furthermore, by arranging the first heat exchanger 7 and the second heat exchanger 8 as in the above embodiment, good heat exchange efficiency, which is an advantage of the parallel flow type heat exchanger, and fin-and-tube heat exchange are achieved. It is possible to achieve both good drainage performance of the vessel, and it is possible to prevent drainage and suction of water droplets into the blower 6 without deteriorating the function and capacity.

  In addition, this invention is not limited to the said embodiment, Of course, many corrections and changes can be added to the said embodiment within the scope of the present invention. The air conditioner is not limited to a separate type having an indoor unit body and an outdoor unit body, and may be provided in an integrated air conditioner in which the indoor unit body and the outdoor unit body are integrated.

  The arrangement of the first heat exchanger and the second heat exchanger is not limited to this. For example, as shown in FIG. 4A, the other end of the first heat exchanger 30 (the rear end in the front-rear direction of the indoor unit body) may be positioned on the back wall 34 of the indoor unit body 33. In this case, a water channel 35 is formed in the back wall 34 of the indoor unit main body 33 to guide water droplets flowing down from the first heat exchanger 30 to the drain pan. The water channel 35 reaches the rear side end of the drain pan 31 along the wall surface of the piping space 36 provided behind the indoor unit main body 33. Thereby, water droplets from the first heat exchanger 30 surely flow down to the drain pan 31.

  Moreover, as shown in FIG.4 (b), you may make the indoor unit main body 40 itself incline with respect to a wall surface. In this case, the back wall 41 and the lower surface 42 of the indoor unit main body 40 are drain pans, and the drain port 43 is provided on the rear side of the lower surface of the indoor unit main body 40. Thereby, it is not necessary to provide an extra member, and cost reduction can be achieved.

  Moreover, as shown in FIG.4 (c), you may provide the 2nd heat exchanger 50 in a dogleg shape. As a result, the surface area is increased as compared with the case where one plate is inclined, and heat exchange with more air is possible. In addition, in this drawing, although the thing when the indoor unit main body 51 itself is inclined is shown, it is not particularly limited, and a normal indoor unit main body parallel to the wall surface may be provided.

  In the present embodiment, the first heat exchanger is a parallel flow type and the second heat exchanger is a fin-and-tube type. However, the present invention is not particularly limited to this. However, when the 2nd heat exchanger 8 is a parallel flow type, it is necessary to be a finless type down flow type which does not have a corrugated fin but consists only of a flat refrigerant pipe. This is because when there is no corrugated fin, the drainage of the downflow heat exchanger is good.

  Moreover, when the 2nd heat exchanger 8 is a fin and tube type, it is necessary to have an angle which a water droplet does not scatter at least to the indoor unit side air blower 8 side with respect to a horizontal surface. By doing in this way, it is because it can prevent blowing from the blower outlet 4 in a 2nd heat exchanger, even if a 1st heat exchanger is left too much and a water droplet splashes. Alternatively, the first heat exchanger may be a fin-and-tube type, and the second heat exchanger may be a finless type down flow type parallel flow type.

Overall perspective view of an air conditioner according to the present embodiment Side sectional view of the air conditioner The figure which shows schematic structure of an air conditioner It is side sectional drawing of the air conditioner of other embodiment, Comprising: (a) is a figure which shows the case where it arrange | positions so that the other end side of a 1st heat exchanger may be located in the back wall vicinity of an indoor unit main body, FIG. 4B is a diagram showing a case where the indoor unit body is tilted and the drain pan is disposed on the lower surface and the back wall of the indoor unit body. FIG. 5C is a diagram illustrating the tilting of the indoor unit body and the second heat exchanger. The figure which shows the case where it forms in letter shape

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Indoor unit main body 2 Outdoor unit main body 3 Intake port 4 Outlet 5 Filter 6 Indoor unit side air blower 7 1st heat exchanger 8 2nd heat exchanger 9 Louver 10 Solenoid valve 12 Drain pan 12a Drain port 13 Compressor 14 Four-way switching valve DESCRIPTION OF SYMBOLS 15 Outdoor unit side heat exchanger 16 Flow control valve 17 Accumulator 18 Outdoor unit side blower 19 Outdoor unit temperature sensor 20 Refrigerant piping 21 Indoor temperature sensor 23 Control member 24 Refrigerant tube 25 Refrigerant tube 26 Corrugated fin 27 Heat transfer fin 28 Back wall 30 First heat exchanger 31 Drain pan 32 Second heat exchanger 33 Indoor unit body 34 Back wall 35 Water channel 36 Piping space 40 Indoor unit body 41 Back wall 42 Lower surface 43 Drain port 50 Second heat exchanger 51 Indoor unit body 100 Controller

Claims (5)

The indoor unit body is formed longer in the front-rear direction than the height direction, the air inlet is formed on the top surface of the indoor unit body, the air outlet is formed on the front surface of the indoor unit body, and the air passage extends from the air inlet to the air outlet Are arranged in the order of the first heat exchanger, the second heat exchanger smaller than the first heat exchanger, and the blower from the upstream side in the air flow direction , and the blower is arranged in the order of the first heat exchanger and the second heat exchange. Located in front of the container,
The first heat exchanger is disposed so as to face the intake port, and is provided so as to be inclined so that a rear end is lower than a front end, and the second heat exchanger is provided with the first heat exchange. In order to prevent water droplets generated in the cooler from being sucked into the blower , the tilt angle is larger than that of the first heat exchanger at the front side below the first heat exchanger. The front end of the second heat exchanger is close to the lower side of the front end of the first heat exchanger, and the rear end of the second heat exchanger is located away from the rear end of the first heat exchanger. And the said 2nd heat exchanger is arrange | positioned so that the suction part of the said air blower may be covered, The air conditioner characterized by the above-mentioned. In the indoor unit body , there is a drain pan that collects water droplets and discharges them outside.
Side end after the first heat exchanger is positioned in the vicinity of the side end after said drain pan of claim 1, wherein the side edge after the second heat exchanger, characterized in that positioned on the front side end near the drain pan Air conditioner. The air conditioner according to claim 1 or 2, wherein the indoor unit body is inclined downward and a drain pan is formed by a lower surface and a back wall of the indoor unit body. The second heat exchanger is a fin-and-tube heat exchanger having a plurality of heat transfer fins parallel to each other, and the heat transfer fins are arranged in the longitudinal direction of the indoor unit main body. The air conditioner according to any one of claims 1 to 3 . The air conditioner according to any one of claims 1 to 3, wherein the second heat exchanger is a finless type parallel flow type heat exchanger.

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