JP5997115B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner.

With the recent increase in energy conservation awareness, there is a need for air conditioners with low power consumption in order to reduce carbon dioxide (CO ₂ ) emitted during power generation. Therefore, the heat of the heat exchangers of air conditioners is required. There is a need to further increase exchange efficiency. In particular, as a means to increase the efficiency of indoor heat exchangers, heat exchangers are formed in multistage bends or circular arcs, etc., and are arranged so as to surround the blower fan, thereby expanding the heat exchanger area in a limited space. It is generally known to improve the heat exchange efficiency.

  In Patent Document 1, in an indoor heat exchanger composed of a front heat exchange plate, a rear heat exchange plate, and a heat transfer pipe (heat exchange pipe), the front heat exchange plate and the rear heat exchange plate are arranged at the upper part. Combined to form a substantially bowl-like shape, and its air ventilation resistance is substantially uniform over at least the combined region of the upper part of the indoor heat exchange plate formed in the substantially bowl-like shape from the front side heat exchange plate. An indoor unit of an air conditioner is described.

JP 2010-190533 A

  By the way, in the heat exchanger described in Patent Document 1, in order to make the ventilation resistance uniform, it is necessary to secure the vertical width of the joint portion. However, in the heat exchanger described in Patent Document 1, the number of heat transfer tubes at the same height is six except for the joint portion, whereas the number of heat transfer tubes at the same height is three at the joint portion. Or five. In other words, in the heat exchanger described in Patent Document 1, the width in the vertical direction must be secured at the joint where the number of heat transfer tubes at the same height is small, and the indoor unit of the air conditioner is enlarged. There is a problem.

  Then, an object of this invention is to provide the indoor unit of the air conditioner which aims at the efficiency improvement of an indoor heat exchanger, preventing the enlargement of the indoor unit of an air conditioner.

The air conditioner of the present invention is an indoor heat exchanger configured by combining an air passage connecting an inlet and an outlet, and an upper portion of a front-side heat exchanger and a rear-side heat exchanger disposed in the air passage. Among the upstream side heat transfer tubes located on the upstream side in the air flow direction of the front side heat exchanger, the upstream side upper heat transfer tube located on the upper end is an upstream side heat transfer tube other than the upstream side upper end heat transfer tube The downstream upper end transmission located at the upper end of the downstream heat transfer tubes located downstream from the upper end extension of the curve or straight line connecting the downstream ends in the air flow direction of the front heat exchanger. The heat pipe is located on the back side from the upper end extension of the curve or straight line connecting the downstream heat transfer pipes other than the downstream upper end heat transfer pipe, and the distance between the upstream upper end heat transfer pipe and the downstream upper end heat transfer pipe is The upstream heat transfer tube other than the upstream upper end heat transfer tube and the And wherein the shorter than the distance between the flow side the downstream heat exchanger tube other than heat transfer tube upper end.

  ADVANTAGE OF THE INVENTION According to this invention, the indoor unit of the air conditioner which aims at the efficiency improvement of an indoor heat exchanger can be provided, preventing the enlargement of the indoor unit of an air conditioner.

It is a whole perspective view which shows the whole structure of the air conditioner which concerns on 1st Example. It is an indoor unit sectional view concerning the 1st example. It is the figure which showed the structure of the top part of the indoor heat exchanger which concerns on 1st Example. It is the figure which showed the structure of the top part of the indoor heat exchanger which concerns on 1st Example.

  Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

(First embodiment)
The whole structure of an air conditioner is demonstrated using FIG.1 and FIG.2. FIG. 1 is an overall perspective view showing the overall configuration of the air conditioner according to the first embodiment. FIG. 2 is a sectional view of the indoor unit according to the first embodiment.

  The air conditioner 1 is composed of an indoor unit 2 arranged in a room for air conditioning and an outdoor unit 3 arranged outdoors, and a connection pipe through which a refrigerant flows between the two. 4 (including electrical wiring), and the air is conditioned by exchanging heat between the indoor and outdoor with a refrigerant. The outdoor unit 3 includes a compressor, an outdoor heat exchanger, an expansion valve, and the like. The indoor unit 2 includes an indoor heat exchanger 10.

  As shown in FIG. 2, the indoor unit 2 encloses a casing 5 in which resin is molded into a laterally substantially box-shaped outer shape, a blower 8 (cross-flow fan), and the blower 8 inside the casing 5. Thus, the indoor heat exchanger 10 is arranged. The indoor heat exchanger 10 and the blower 8 have substantially the same width. A dew pan 11 or the like is attached to the back (rear) side of the inside of the housing 5, covered with a decorative frame 12 (see FIG. 1) constituting the housing 5, and further, on the front of the decorative frame 12 A front panel 13 is attached.

  Above the decorative frame 12, a suction port 6a for sucking room air is provided, and below that, a blow-out port 7 for blowing out air whose temperature and humidity are harmonized by heat exchange is provided. And the indoor unit 1 is provided with the air passage 15 which connects the suction inlet 6a and the blower outlet 7. FIG. The air flow blown out from the blower 8 disposed in the air passage 15 is caused to flow to the blowout port 7 having a width substantially equal to the length of the blower 8, and airflow is generated by left and right wind direction plates (not shown) arranged in the middle of the blowout port 7. The airflow is deflected in the up-and-down direction by the rotatable up-and-down wind direction plate 14 disposed at the air outlet 7 and blown out into the room.

The indoor heat exchanger 10 is disposed in the air passage 15 and is configured by combining a front side heat exchanger 101 and a back side heat exchanger 102 at the upper part. The front side heat exchanger 101 and the back side heat exchanger 102 are made of, for example, fins (heat exchange plates) in which a plurality of thin aluminum plates are attached and copper holes inserted in holes formed in the fins. It is formed by a heat transfer tube (refrigerant tube). Note that a minute gap is formed between the fins, and an indoor air flow is passed between the fins, so that heat is exchanged between the refrigerant flowing through the heat transfer tube from the outdoor unit 3 and the air. Is done. The blower 8 for blowing is provided downstream of the air flow passing through the indoor heat exchanger 10. That is, as the blower 8 rotates, indoor air is blown out from the air outlet 7 through the indoor heat exchanger 10 and the blower 8 from the suction port 6 a provided in the indoor unit 2.

  In addition to the blower 8, an upper filter 9 a and a front filter 9 b are attached to the housing 5. The upper surface filter 9 a and the front surface filter 9 b are disposed in the air passage 15 and are located on the upstream side of the indoor heat exchanger 10. And these basic internal structures are enclosed in the indoor unit 2 by attaching the decorative frame 12. A movable panel 13 is attached to the decorative frame 12 so as to be rotatable by a drive motor with a rotation shaft provided at the lower part as a fulcrum. When the air conditioner 1 is operated, the front side air suction portion 6b is opened. It is configured as follows. Thereby, during operation, indoor air is sucked not only from the upper suction port 6a described above but also from the front air suction portion 6b. Note that when the air conditioner 1 is stopped, the front-side air suction portion 6b is closed.

  Next, the indoor heat exchanger 10 will be described with reference to FIG. FIG. 3 is a view showing the configuration of the top portion of the indoor heat exchanger according to the first embodiment. The indoor heat exchanger 10 shown in FIG. 2 is taken out, and in particular, a side sectional view showing details of the upper portion. is there.

  As described above, the indoor heat exchanger 10 includes a plurality of thin aluminum plates (heat exchange plates) and copper heat transfer tubes (heat exchange pipes) inserted into holes formed in the fins. It is configured. The indoor heat exchanger 10 is substantially linear with the front-side heat exchanger 101 formed to be curved along the outer periphery of the blower 8 (that is, to be orthogonal to the airflow flowing toward the blower 8 as much as possible). And the rear side heat exchanger plate 101 and the rear side heat exchange plate 102 are brought into contact with each other at the joint surface “C” at the top thereof. As a result, it is manufactured to an outer shape of approximately “Λ”.

  Here, as shown in FIG. 3, in the front side heat exchanger 101 and the back side heat exchanger 102 joined in the “Λ” shape, a joint portion 103 between the front side heat exchanger 101 and the back side heat exchanger 102. The width (the distance at which air flows between the fins) of (the upper portion of the indoor heat exchanger 10) is smaller than the width (the distance at which air flows between the fins) of the front-side heat exchanger 101 and the back-side heat exchanger 102. Therefore, in the upper part of the indoor heat exchanger 10, the air draft resistance becomes small, and there is a possibility that the air that has flowed in passes through the heat exchanger without sufficiently exchanging heat.

  Here, in order to make the ventilation resistance uniform, the air ventilation resistance is reduced by increasing the width in the vicinity of the junction between the front side heat exchanger 101 and the rear side heat exchanger 102 (upper part of the indoor heat exchanger 10). You can make it bigger. However, in this embodiment, the number of heat transfer tubes at the same height is six except in the vicinity of the joint portion of the indoor heat exchanger 10, whereas the same height is present in the vicinity of the joint portion of the indoor heat exchanger 10. There are three heat transfer tubes. That is, if the width in the vicinity of the joint with a small number of heat transfer tubes at the same height is increased, the indoor unit 1 is increased in size.

  Therefore, in the present embodiment, the upstream side heat transfer tube 103 located on the upstream side in the air flow direction of the front-side heat exchanger 101 that forms a plurality of rows (three rows) in the air flow direction is positioned at the upper end. The upstream upper end heat transfer tube 103a is positioned on the back side of the upper end side extension of the curve or straight line P connecting the upstream side heat transfer tubes other than the upstream upper end heat transfer tube. In other words, the upstream upper end heat transfer tube 103a is disposed so as to be inclined to the back side with respect to the curve or straight line P connecting the upstream side heat transfer tubes other than the upstream upper end heat transfer tube. According to such a present Example, the heat exchanger tube around the junction part of the indoor heat exchanger 10 can be arranged densely, and the ventilation resistance in the vicinity of the junction part of the indoor heat exchanger 10 can be increased. it can. Therefore, the ventilation resistance of the indoor heat exchanger 10 can be made uniform without increasing the width near the joint. Furthermore, the length of the indoor heat exchanger 10 in the height direction can be shortened by the amount of inclination of the top heat transfer tube 103 located at the top of the indoor heat exchanger 10, and the indoor unit 1 can be downsized.

  Further, the arrangement interval between the upstream upper heat transfer tubes 103a and the upstream heat transfer tubes 103 adjacent to the upstream upper heat transfer tubes 103a is equal to the arrangement interval between the upstream heat transfer tubes 103 other than the upstream upper heat transfer tubes 103a. Moreover, the arrangement | positioning space | interval of the midstream side heat exchanger tube and the downstream heat exchanger tube 104 is also the same. According to the present embodiment, the types of U-shaped heat transfer tubes can be unified, and the manufacturability of the indoor unit 1 is improved.

  Further, among the upstream heat transfer tubes 103 located on the upstream side, the upstream upper heat transfer tube 103a located on the upper end is on the upper end side extension of the curve or straight line P connecting the upstream heat transfer tubes other than the upstream upper heat transfer tube. Compared with the case where the upstream upper end heat transfer tube 103a is installed, the upstream side heat transfer tube 103 is installed at a lower position by being inclined to the back side. That is, the length of the front side heat exchanger 101 in the vertical direction can be shortened, and the indoor unit 1 can be downsized.

  Of the downstream heat transfer tubes 104 located on the downstream side in the air flow direction of the front heat exchanger 101, the downstream upper heat transfer tube 104a located on the upper end is a downstream heat transfer tube other than the downstream upper heat transfer tube. The distance X between the upstream upper end heat transfer tube and the downstream upper end heat transfer tube is located behind the upper end side extension of the connecting curve or straight line Q. The distance X between the upstream upper end heat transfer tube and the upstream upper end heat transfer tube It is shorter than the distance Y with the downstream heat transfer tubes other than the heat tubes. According to this embodiment, the heat transfer tubes around the joint between the front side heat exchanger 101 and the rear side heat exchanger 102 can be arranged more densely.

  In addition, although description about the middle flow side heat exchanger tube was abbreviate | omitted, it is set as the structure similar to the downstream heat exchanger tube 104. FIG. Moreover, you may comprise so that the inclination of the upper end heat exchanger tube of the front side heat exchanger 101 may increase gradually toward the upstream from the downstream.

  A configuration may be adopted in which the inclination of the middle flow side upper end heat transfer tube and the inclination of the downstream side upper end heat transfer tube 104a are set to 0, and only the upstream side upper end heat transfer tube 103a is inclined.

  A heat transfer tube other than the upstream upper end heat transfer tube 103 may be inclined. For example, the upstream heat transfer tube 103 adjacent to the upstream upper heat transfer tube 103a may be inclined. In this case, it is assumed that the curve or straight line P connecting the upstream heat transfer tubes other than the upstream upper heat transfer tube is connected to the curve or straight line except for the upstream heat transfer tube 103 adjacent to the upstream upper heat transfer tube 103a.

  Similarly, the heat transfer tubes other than the downstream upper end heat transfer tube 104 may be inclined. For example, the downstream heat transfer tube 104 adjacent to the downstream upper heat transfer tube 104a may be inclined. In this case, the curve or straight line Q connecting the downstream heat transfer tubes other than the downstream upper end heat transfer tube is connected to the curve or straight line except for the downstream heat transfer tube 104 adjacent to the downstream upper heat transfer tube 104a.

As shown in FIG. 2, the back side of the indoor heat exchanger 10 is in contact with the housing 5 and is arranged in the vertical direction in parallel with the indoor wall. Therefore, the air inflow path to the back side heat exchanger 102 is narrow, and the air hardly flows to the back side heat exchanger 102.

Therefore, in this embodiment, as shown in FIG. 3, the corner of the top (R portion) of the back side heat exchanger 102 has an arc shape, and the amount of air flowing into the back side heat exchanger 102 where the air does not easily flow is reduced. Increasing.

  FIG. 4 is a diagram illustrating the configuration of the top of the indoor heat exchanger according to the first embodiment. As above-mentioned, the indoor heat exchanger 10 is arrange | positioned so that the air blower 8 located in the center of the indoor unit 1 may be surrounded. When the blower 8 is driven, the taken-in air flows through the indoor heat exchanger 10 through the top filter 9a and the front filter 9b.

  Here, when the distance between the indoor heat exchanger 10 and the upper surface filter 9a is narrow, the condensed water generated in the indoor heat exchanger 10 due to variations during assembly and the like comes into contact with the upper surface filter 9a, causing problems such as water dripping. There is a risk of it happening.

  Therefore, in this embodiment, the shape of the top portion of the indoor heat exchanger 10 is substantially parallel to the upper surface filter 9a. According to this embodiment, the number of heat transfer tubes of the indoor heat exchanger 10 is increased while keeping the height of the indoor unit 1 within a specified dimension and securing the distance between the indoor heat exchanger 10 and the upper surface filter 9a. be able to.

  Furthermore, in the present embodiment, as shown in FIG. 4, among the heat transfer tubes of the back side heat exchanger 102, the heat transfer tube located at the upper end is arranged at a position lower than the downstream upper end heat transfer tube 104 a. Therefore, in the vicinity of the top portion of the indoor heat exchanger 10, the ventilation resistance of the back side heat exchanger 102 is smaller than that of the front side heat exchanger 101. That is, the inflow path of the air to the back side heat exchanger 102 can be substantially increased, and the air can easily flow to the back side heat exchanger 102.

  In addition, as shown in FIG. 4, among the heat transfer tubes of the back surface side heat exchanger 102, the heat transfer tubes positioned at the upper end of all the heat transfer tubes positioned at the upper end of the heat transfer tubes of the front side heat exchanger 101 are used. It is desirable to be arranged at a low position.

  The distance L in the vertical direction between the heat transfer tube located at the top of the rear side heat exchanger 102 and the heat transfer tube located at the top of the front side heat exchanger 101 is considered to make the entire air ventilation resistance of the indoor heat exchanger 10 uniform. And the heat transfer tube diameter d or less (L ≦ d).

  As mentioned above, although the 1st Example demonstrated the air conditioner which concerns on this invention, the Example of this invention is not limited to these description, A various change etc. can be performed.

  For example, in the first embodiment, the case where the heat transfer tube of the front side heat exchanger 101 is arranged near the top of the indoor heat exchanger 10 has been described, but the heat transfer tube of the back side heat exchanger 102 is connected to the indoor heat exchanger 10. It may be arranged near the top. In this case, the heat transfer tube is arranged so that the upper end heat transfer tube of the back side heat exchanger 102 is inclined to the back side.

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Indoor unit 3 Outdoor unit 4 Connection piping 5 Case 6a Suction port 6b Front side air suction part 7 Air outlet 8 Blower 9a Top surface filter 9b Front filter 10 Indoor heat exchanger 11 Dew tray 12 Dressing frame 13 Movable panel 14 Up-down wind direction plate 15 Air passage 101 Front side heat exchanger 102 Rear side heat exchanger 103 Upstream heat transfer tube 103a Upstream upper end heat transfer tube 104 Downstream side heat transfer tube 104a Downstream upper end heat transfer tube X Upstream upper end heat transfer tube and downstream side Distance Y from the upper end heat transfer tube Distance P between the upstream heat transfer tube other than the upstream upper end heat transfer tube and the downstream heat transfer tube other than the downstream upper end heat transfer tube A curve or straight line connecting the upstream heat transfer tubes other than the upstream upper end heat transfer tube Q Curves or straight lines connecting downstream heat transfer tubes other than the downstream upper end heat transfer tubes

Claims (6)

An air passage connecting the inlet and the outlet;
An indoor heat exchanger that is disposed in the air passage and is configured by combining a front side heat exchanger and a back side heat exchanger at the top;
Among the upstream side heat transfer tubes located on the upstream side in the air flow direction of the front side heat exchanger, the upstream side upper end heat transfer tube located on the upper end is the upstream side heat transfer tube other than the upstream side upper end heat transfer tube. Located on the back side from the upper end extension of the connecting curve or straight line ,
Of the downstream heat transfer tubes located on the downstream side in the air flow direction of the front heat exchanger, the downstream upper heat transfer tube located at the upper end is the downstream heat transfer tube other than the downstream upper heat transfer tube. Located on the back side from the upper end extension of the connecting curve or straight line,
The distance between the upstream upper end heat transfer tube and the downstream upper end heat transfer tube is greater than the distance between the upstream heat transfer tube other than the upstream upper end heat transfer tube and the downstream heat transfer tube other than the downstream upper end heat transfer tube. Air conditioner indoor unit characterized by being short . 2. The air conditioner room according to claim 1 , wherein a heat transfer tube located at an upper end of the heat transfer tubes of the back side heat exchanger is disposed at a position lower than the downstream upper end heat transfer tube. Machine. An upper surface filter disposed in the air passage and located upstream of the indoor heat exchanger;
The indoor unit of the air conditioner according to claim 1 or 2 , wherein a shape of a top portion of the indoor heat exchanger is substantially parallel to the upper surface filter. The indoor unit of the air conditioner according to any one of claims 1 to 3, wherein a corner portion of a top portion of the back side heat exchanger has an arc shape. An arrangement interval between the upstream upper heat transfer tubes and the upstream heat transfer tubes adjacent to the upstream upper heat transfer tubes is equal to an arrangement interval between the upstream heat transfer tubes other than the upstream upper heat transfer tubes. The indoor unit of the air conditioner as described in any one of Claims 1-4 . The indoor unit of the air conditioner according to any one of claims 1 to 5 ,
An air conditioner comprising an outdoor unit having a compressor, an outdoor heat exchanger, and an expansion valve.