JP3924947B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
[0002]
  The present invention relates to an air conditioner having a ventilation function.
[Prior art]
[0003]
  In recent years, in the air conditioner, from the viewpoint of obtaining more comfortable air conditioning characteristics, instead of the conventional single-function type air conditioner having only a general temperature adjustment function, ventilation with an outside air introduction function added thereto User needs for air conditioners with functions are increasing.
[0004]
  By the way, among the air conditioners, in particular, in a ceiling-embedded indoor unit in which a centrifugal fan is generally used as a blower fan, it is provided on the lower surface of the casing 101 like the indoor unit Z01 shown in FIG. A single-suction centrifugal fan X0 that is rotationally driven by a motor 108 is disposed in the ventilation path 100 from the suction port 102 to the blower outlet 103, and the fan suction port of the centrifugal fan X0 faces the suction port 102. The air reforming device 109 and the heat exchanger 110 are arranged facing the fan outlet 25 of the centrifugal fan X0. Then, by operating the centrifugal fan X0, the temperature of the room air (return flow A02) sucked from the suction port 102 is adjusted by heat exchange in the heat exchanger 110 and then blown out into the room (outflow flow) A3) Indoor heating or cooling is performed.
[0005]
  In the case of adding a ventilation function to the single-function indoor unit Z01 having only temperature adjustment to make it multi-functional, the fan inlet of the centrifugal fan X0 as in the indoor unit Z02 shown in FIG. A chamber 105 having a predetermined volume is provided between the bell mouth 107 located on the side and the grill 104 provided in the suction port 102 of the casing 101, and the outside air introduced into the chamber 105 on the side wall of the casing 101 is introduced. It was customary to introduce fresh outside air through the port 106 (outside air flow A01), mix this with the return flow A02 from the room and adjust the temperature, and then blow out into the room.
[0006]
  14 and 15, reference numeral 109 denotes an air reforming member such as an air reforming device.
[Problems to be solved by the invention]
[0007]
  However, in the case of the indoor unit Z02 configured to exhibit the ventilation function by introducing the outside air into the outside air chamber 105 provided on the fan inlet side of the centrifugal fan X0, for example, outside air introduction efficiency Even if the amount of outside air supplied to the outside air inlet 106 is increased in order to increase the flow rate, the return flow A02 that is sucked into the centrifugal fan X0 through the inlet 102 exists in the chamber 105. The introduction of outside air into the chamber 105 is suppressed, and as a result, it is difficult to efficiently introduce outside air.
[0008]
  Therefore, in the present invention, in an air conditioner equipped with a centrifugal fan, the purpose is to ensure a high ventilation function by efficiently introducing outside air, and to further improve the added value by multi-function. Is.
[Means for Solving the Problems]
[0009]
  In the present invention, the following configuration is adopted as a specific means for solving such a problem.
[0010]
  In the air conditioner according to the first invention of the present application, in the ventilation path 41 extending from each of the first suction port 2A and the second suction port 2B that open in the opposite state in the coaxial position to the blowout port 3, the axial direction Both suction type centrifugal fans X2, X3, X4, and X5 each having a first fan suction port 23 and a second fan suction port 24 are arranged on both sides, and the fans of the centrifugal fans X2, X3, X4, and X5 The heat exchanger 10 is arranged facing the air outlet 25, while the first suction port 2A faces the outside air introduction path 13 and the second suction port 2B faces the indoor space,In the internal vacant space 42 of the centrifugal fans X2, X3, X4, X5, the internal vacant space 42 is exposed to the first internal vacant space 42A facing the first suction port 2A and the second vacant air surface facing the second suction port 2B. A partition plate 31 is provided, which is partitioned into internal vacancies 42B and enables the volume ratio of the first internal vacancies 42A and the second internal vacancies 42B to be changed.
[0011]
  In the air conditioner according to the second invention of the present application, in the ventilation path 41 extending from each of the first suction port 2A and the second suction port 2B, which open in the opposite state at the coaxial position, to the air outlet 3 in the axial direction. Both suction type centrifugal fans X2, X3, X4, and X5 each having a first fan suction port 23 and a second fan suction port 24 are arranged on both sides, and the fans of the centrifugal fans X2, X3, X4, and X5 The heat exchanger 10 is arranged facing the air outlet 25, and the first suction port 2A faces the outside air introduction path 13 and the second suction port 2B faces the indoor space, while the outside air introduction path 13 While configuring the wall surface of the casing 1 provided with the first suction port 2A as a space between the walls obtained as double walls 1A, 1B,In the internal vacant space 42 of the centrifugal fans X2, X3, X4, X5, the internal vacant space 42 is exposed to the first internal vacant space 42A facing the first suction port 2A and the second vacant air surface facing the second suction port 2B. A partition plate 31 is provided, which is partitioned into internal vacancies 42B and enables the volume ratio of the first internal vacancies 42A and the second internal vacancies 42B to be changed.
[0012]
  In the air conditioner according to the third invention of the present application, in the ventilation path 41 extending from the first suction port 2A and the second suction port 2B that open in the opposite state at the coaxial position to the air outlet 3, Both suction type centrifugal fans X2, X3, X4, and X5 each having a first fan suction port 23 and a second fan suction port 24 are arranged on both sides, and the fans of the centrifugal fans X2, X3, X4, and X5 The heat exchanger 10 is arranged facing the air outlet 25, and the first suction port 2A faces the outside air introduction path 13 and the second suction port 2B faces the indoor space, while the outside air introduction path 13 While constituted by the passage forming member 12 arranged to cover the first suction port 2A portion from the outside,In the internal vacant space 42 of the centrifugal fans X2, X3, X4, X5, the internal vacant space 42 is exposed to the first internal vacant space 42A facing the first suction port 2A and the second vacant air surface facing the second suction port 2B. A partition plate 31 is provided, which is partitioned into internal vacancies 42B and enables the volume ratio of the first internal vacancies 42A and the second internal vacancies 42B to be changed.
【The invention's effect】
[0013]
  In the present invention, the following effects can be obtained by adopting such a configuration.
[0014]
  (I)  Of this application1st inventionAccording to the air conditioner according toThe first fan suction port 23 and the second fan suction are provided on both sides in the axial direction in the ventilation path 41 extending from the first suction port 2A and the second suction port 2B, which are opened in a confronting state on the same axis to the blower port 3, respectively. Both suction-type centrifugal fans X2, X3, X4, and X5 each having an opening 24 are disposed, and the heat exchanger 10 is disposed facing the fan outlet 25 of the centrifugal fans X2, X3, X4, and X5. Since the first suction port 2A faces the outside air introduction path 13 and the second suction port 2B faces the indoor space, when the centrifugal fans X2, X3, X4, and X5 are rotationally driven, Centrifugal fans X2, X3, X4, and X5 receive outside air through the outside air introduction path 13 into the first suction port 2A side, and at the same time, return air from the room enters the second suction port 2B side. Both of these are sucked After mixing to a temperature-adjusted in the heat exchanger 10 is blown out into the room.
[0015]
  Therefore, in the air conditioner according to the present invention, the above-described centrifugal fans X2, X3, X4, and X5 are constituted by the double suction centrifugal fans, so that the indoor ventilation by the introduction of the outside air and the indoor air conditioning action are performed in parallel. The air-conditioning characteristics are more comfortable and the effect is that the centrifugal air X2, X3, X4, and X5 have different air intake paths and room air intake paths. Since interference is eliminated as much as possible, the introduction of outside air is not affected by the intake of room air as in the conventional air conditioner with a ventilation function described above, for example. As a synergistic effect of these, The added value is further enhanced by the multi-function of the air conditioner.
[0016]
  Further, in the air conditioner according to the present invention, since the first suction port 2A and the second suction port 2B are both in communication with the air outlet 3, for example, the first suction port 2A and the second suction port 2B. Even if there is a difference in the suction flow rate, the blades 20 can operate effectively and with low noise even without mechanical air volume variable means in the centrifugal fans X2, X3, X4, X5. In addition, good ventilation characteristics with high efficiency can be easily realized with an inexpensive configuration.
[0017]
  further,In the internal vacant space 42 of the centrifugal fans X2, X3, X4, X5, the internal vacant space 42 is exposed to the first internal vacant space 42A facing the first suction port 2A and the second vacant air surface facing the second suction port 2B. Since the partition plate 31 is provided so as to partition the internal vacant chamber 42B and change the volume ratio between the first internal vacant chamber 42A and the second internal vacant chamber 42B, it is sucked from the first suction port 2A. The ratio between the amount of outside air to be returned and the amount of return air from the room sucked from the second suction port 2B, that is, the ventilation characteristics during the air conditioning operation, is partitioned by the setting position of the partition plate 31, that is, the partition plate 31. Furthermore, it can be arbitrarily and easily set by the volume ratio of the first internal vacant space 42A on the first suction port 2A side and the second internal vacant space 42B on the second suction port 2B side. In addition to being realized, the partition plate 31 Thus, by preventing mutual interference between the outside air flowing through the first internal empty space 42A and the return air flowing through the second internal empty space 42B, the ratio between the external air amount and the return air amount is obtained. The controlled ventilation characteristics are ensured more stably.
[0018]
  (B)  Of this applicationSecond inventionAccording to the air conditioner according toThe first fan suction port 23 and the second fan suction are provided on both sides in the axial direction in the ventilation path 41 extending from the first suction port 2A and the second suction port 2B, which are opened in a confronting state on the same axis to the blower port 3, respectively. Both suction-type centrifugal fans X2, X3, X4, and X5 each having an opening 24 are disposed, and the heat exchanger 10 is disposed facing the fan outlet 25 of the centrifugal fans X2, X3, X4, and X5. Since the first suction port 2A faces the outside air introduction path 13 and the second suction port 2B faces the indoor space, when the centrifugal fans X2, X3, X4, and X5 are rotationally driven, Centrifugal fans X2, X3, X4, and X5 receive outside air through the outside air introduction path 13 into the first suction port 2A side, and at the same time, return air from the room enters the second suction port 2B side. Both of these are sucked After mixing to a temperature-adjusted in the heat exchanger 10 is blown out into the room.
[0019]
  Therefore, in the air conditioner according to the present invention, the above-described centrifugal fans X2, X3, X4, and X5 are constituted by the double suction centrifugal fans, so that the indoor ventilation by the introduction of the outside air and the indoor air conditioning action are performed in parallel. The air-conditioning characteristics are more comfortable and the effect is that the centrifugal air X2, X3, X4, and X5 have different air intake paths and room air intake paths. Since interference is eliminated as much as possible, the introduction of outside air is not affected by the intake of room air as in the conventional air conditioner with a ventilation function described above, for example. As a result of these synergistic effects, the added value of the multifunctional air conditioner can be further enhanced.
[0020]
  Further, in the air conditioner according to the present invention, since the first suction port 2A and the second suction port 2B are both in communication with the air outlet 3, for example, the first suction port 2A and the second suction port 2B. Even if there is a difference in the suction flow rate, the blades 20 can operate effectively and with low noise even without mechanical air volume variable means in the centrifugal fans X2, X3, X4, X5. In addition, good ventilation characteristics with high efficiency can be easily realized with an inexpensive configuration.
[0021]
  Furthermore, in the air conditioning apparatus according to the present invention, the outside air introduction path 13 is configured by a space between the walls obtained as the double walls 1A and 1B on the wall surface of the casing 1 provided with the first suction port 2A. Therefore, for example, a dedicated duct member is arranged as the outside air introduction path 13. As compared with the case, the outside air introduction path 13 can be obtained more compactly and inexpensively, and the cost reduction of the air conditioner can be promoted accordingly.
[0022]
  Also,In the air conditioner according to the present invention,In the internal vacant space 42 of the centrifugal fans X2, X3, X4, X5, the internal vacant space 42 is exposed to the first internal vacant space 42A facing the first suction port 2A and the second vacant air surface facing the second suction port 2B. Since the partition plate 31 is provided so as to partition the internal vacant chamber 42B and change the volume ratio between the first internal vacant chamber 42A and the second internal vacant chamber 42B, it is sucked from the first suction port 2A. The ratio between the amount of outside air to be returned and the amount of return air from the room sucked from the second suction port 2B, that is, the ventilation characteristics during the air conditioning operation, is partitioned by the setting position of the partition plate 31, that is, the partition plate 31. Furthermore, it can be arbitrarily and easily set by the volume ratio of the first internal vacant space 42A on the first suction port 2A side and the second internal vacant space 42B on the second suction port 2B side. In addition to being realized, the partition plate 31 Thus, by preventing mutual interference between the outside air flowing through the first internal empty space 42A and the return air flowing through the second internal empty space 42B, the ratio between the external air amount and the return air amount is obtained. The controlled ventilation characteristics are ensured more stably.
[0023]
  (C)  Of this applicationThird inventionAccording to the air conditioner according toThe first fan suction port 23 and the second fan suction are provided on both sides in the axial direction in the ventilation path 41 extending from the first suction port 2A and the second suction port 2B, which are opened in a confronting state on the same axis to the blower port 3, respectively. Both suction-type centrifugal fans X2, X3, X4, and X5 each having an opening 24 are disposed, and the heat exchanger 10 is disposed facing the fan outlet 25 of the centrifugal fans X2, X3, X4, and X5. Since the first suction port 2A faces the outside air introduction path 13 and the second suction port 2B faces the indoor space, when the centrifugal fans X2, X3, X4, and X5 are rotationally driven, Centrifugal fans X2, X3, X4, and X5 receive outside air through the outside air introduction path 13 into the first suction port 2A side, and at the same time, return air from the room enters the second suction port 2B side. Both of these are sucked After mixing to a temperature-adjusted in the heat exchanger 10 is blown out into the room.
[0024]
  Therefore, in the air conditioner according to the present invention, the above-described centrifugal fans X2, X3, X4, and X5 are constituted by the double suction centrifugal fans, so that the indoor ventilation by the introduction of the outside air and the indoor air conditioning action are performed in parallel. The air-conditioning characteristics are more comfortable and the effect is that the centrifugal air X2, X3, X4, and X5 have different air intake paths and room air intake paths. Since interference is eliminated as much as possible, the introduction of outside air is not affected by the intake of room air as in the conventional air conditioner with a ventilation function described above, for example. As a result of these synergistic effects, the added value of the multifunctional air conditioner can be further enhanced.
[0025]
  Further, in the air conditioner according to the present invention, since the first suction port 2A and the second suction port 2B are both in communication with the air outlet 3, for example, the first suction port 2A and the second suction port 2B. Even if there is a difference in the suction flow rate, the blades 20 can operate effectively and with low noise even without mechanical air volume variable means in the centrifugal fans X2, X3, X4, X5. In addition, good ventilation characteristics with high efficiency can be easily realized with an inexpensive configuration.
[0026]
  Further, in the air conditioner according to the present invention, the outside air introduction path 13 is constituted by the passage forming member 12 arranged so as to cover the first suction port 2A portion from the outside thereof. The path 13 can be formed more compactly and inexpensively, and as a result, cost reduction of the air conditioner can be promoted.
[0027]
  Also,In the air conditioner according to the present invention,In the internal vacant space 42 of the centrifugal fans X2, X3, X4, X5, the internal vacant space 42 is exposed to the first internal vacant space 42A facing the first suction port 2A and the second vacant air surface facing the second suction port 2B. Since the partition plate 31 is provided so as to partition the internal vacant chamber 42B and change the volume ratio between the first internal vacant chamber 42A and the second internal vacant chamber 42B, it is sucked from the first suction port 2A. The ratio between the amount of outside air to be returned and the amount of return air from the room sucked from the second suction port 2B, that is, the ventilation characteristics during the air conditioning operation, is partitioned by the setting position of the partition plate 31, that is, the partition plate 31. Furthermore, it can be arbitrarily and easily set by the volume ratio of the first internal vacant space 42A on the first suction port 2A side and the second internal vacant space 42B on the second suction port 2B side. In addition to being realized, the partition plate 31 Thus, by preventing mutual interference between the outside air flowing through the first internal empty space 42A and the return air flowing through the second internal empty space 42B, the ratio between the external air amount and the return air amount is obtained. The controlled ventilation characteristics are ensured more stably.
DETAILED DESCRIPTION OF THE INVENTION
[0028]
  Hereinafter, the present invention will be specifically described based on preferred embodiments.
[0029]
  First embodiment
  FIG. 1 shows a ceiling-embedded indoor unit Z1 as an embodiment of an air conditioner according to the present invention. The indoor unit Z1 has a basic configuration similar to that of the conventional indoor unit Z02 having the ventilation function shown in FIG. 15 described above, and an aperture ratio variable mechanism 15 described later is attached to the conventional unit, As a result, outside air can be introduced more efficiently.
[0030]
  That is, the indoor unit Z1 has a suction port 2 provided with a grille 4 at the center of the lower surface of the casing 1 that is embedded in the ceiling, and an air outlet 3 that surrounds the suction port 2 on the outside. And a single suction centrifugal fan X1 having a conventionally well-known structure in the ventilation path 41 from the suction port 2 through the chamber 5 to the blowout port 3, and the fan suction port 18 as described above. It is arranged in a state where it faces the bell mouth 7 arranged facing the suction port 2, and this is rotated by a motor 11 attached to the top plate 1A side of the casing 1 and the fan blow of the centrifugal fan X1. For example, an air reforming member 9 such as an air reforming device and a heat exchanger 10 are arranged upright on the outside of the outlet 19 so as to face each other. The chamber 5 is communicated with the outside through an outside air inlet 6 formed on the side wall of the casing 1.
[0031]
  Furthermore, in the indoor unit Z1 of this embodiment, the following opening ratio variable mechanism 15 that can change the opening ratio of the suction port 2 as appropriate can be attached to the suction port 2 portion. As the aperture ratio variable mechanism 15, various structures are conceivable. As an example here, as shown in FIG. 2, a pair of first aperture plates 15A that are coaxially arranged and rotated relative to each other as appropriate. And the second opening plate 15B. Each of the opening plates 15A and 15B is formed of a disc body having an outer dimension corresponding to the diameter of the suction port 2. The aperture plates 15A, 15B are formed with substantially fan-shaped openings 16, 16,..., 17, 17,. The aperture ratio variable mechanism 15 is configured by superimposing the pair of aperture plates 15A and 15B on the same axis, and the aperture ratio variable mechanism 15 appropriately rotates the pair of aperture plates 15A and 15B. By changing the degree of polymerization of the openings 16, 16,... On the first opening plate 15A side and the openings 17, 17,. The rate is adjusted up or down. Incidentally, in the structure example, the opening ratio of the suction port 2 can be adjusted steplessly in the range of 0% to 50%.
[0032]
  As described above, in the indoor unit Z1 in which the opening ratio variable mechanism 15 that can increase or decrease the opening ratio of the suction port 2 is arranged in the suction port 2 portion, the following operation state is obtained.
[0033]
  That is, when the air conditioner is operated and the centrifugal fan X1 is rotationally driven in the indoor unit Z1, the suction / blow-out action causes the outside air inlet 6 to move toward the chamber 5 as shown by the air flow A1. While the outside air is introduced, return air from the room is sucked into the chamber 5 through the suction port 2 as shown by the air flow A2. The introduced outside air and the return air are sucked from the fan inlet 18 of the centrifugal fan X1 and blown out from the fan outlet 19 in a mixed state. At this time, the air passes through the air reforming device 9. In addition, a reforming action such as deodorization is performed, and the temperature is adjusted by exchanging heat with the refrigerant in the internal circulation when passing through the heat exchanger 10, and finally hot air or cold air is used. As shown by the air flow A3, the room is heated or cooled by being blown into the room from the outlet 3.
[0034]
  As described above, the introduction of the outside air in parallel with the intake of the return air allows the room to be properly ventilated and comfortable indoor air conditioning is realized. In this case, the variable aperture ratio mechanism 15 is used. Thus, by changing the opening ratio of the suction port 2 as appropriate, ventilation characteristics corresponding to the indoor air condition and the like can be obtained, and the comfort of indoor air conditioning can be further enhanced. That is, for example, in the state where the opening ratio of the suction port 2 is set to 50% by the opening ratio variable mechanism 15, the ratio of the outside air amount and the return air amount is almost halved, and normal air conditioning combined with ventilation is performed. When the opening ratio of the suction port 2 is set to 25%, for example, the outside air is introduced with an increased efficiency of introducing outside air in response to a decrease in the return air amount as the opening ratio of the suction port 2 decreases. The amount is relatively increased, and air conditioning with an emphasis on ventilation is realized. Such air conditioning characteristics are suitable, for example, when indoor air pollution progresses and the demand for ventilation from indoor residents increases accordingly.
[0035]
  In addition, as a method of adjusting the opening ratio of the suction port 2 by the opening ratio variable mechanism 15, a method of adjusting manually or electrically as necessary, or a degree of indoor air contamination based on the output of an odor sensor or the like. Correspondingly, various methods such as an electric adjustment method can be applied. In addition to the configuration as in the embodiment described above, the aperture ratio variable mechanism 15 is configured in a blind shape using, for example, strip-shaped plate pieces, and these plate pieces are rotated in the plate thickness direction. Various configurations can be applied, such as those that can be adjusted and the opening ratio of the suction port 2 can be adjusted in a wide range from approximately 100% to 0% by appropriately adjusting the amount of rotation of each plate piece. It is.
[0036]
  Second embodiment
  FIG. 3 shows a ceiling-embedded indoor unit Z2 as an embodiment of an air conditioner according to the present invention. The indoor unit Z2 includes a casing 1 that is embedded in a ceiling. The casing 1 has a double wall structure in which the ceiling wall portion includes a pair of top plates 1A and a top plate 1B opposed to each other in a vertical direction with a predetermined interval, and among the top and bottom pair of top plates 1A and 1B, At the center of the top plate 1A located on the lower side, a first suction port 2A having a peripheral edge portion as a bell mouth 8 is formed. The first suction port 2A communicates with the outside through an outside air introduction path 13 formed by a space between walls between the pair of top plates 1A and 1B. Further, a second suction port 2B provided with a grill 4 and a bell mouth 7 is formed at the center of the lower surface of the casing 1, and the outer periphery of the second suction port 2B is surrounded by the second suction port 2B. The blower outlet 3 is provided.
[0037]
  Therefore, in the casing 1 having such a configuration, a ventilation path 41 extending from both the first suction port 2A and the second suction port 2B to the blowout port 3 is formed inside thereof. And in the ventilation path 41 of this casing 1, the air reforming device 9 and the heat exchanger 10 are arranged upright in an opposed state so as to surround the first suction port 2A and the second suction port 2B. At the same time, a centrifugal fan X2 described below is arranged on the inner side in the radial direction of both.
[0038]
  As shown in FIGS. 4 and 5, the centrifugal fan X2 has a first shroud 21 provided with a first fan suction port 23 in the axial center portion and a second fan suction port 24 provided in the axial center portion. The second shroud 22 is disposed such that the first fan suction port 23 and the second fan suction port 24 are coaxially positioned and face each other at a predetermined interval in the axial direction. The outer periphery of the facing space is a fan outlet 25. The fan air outlet 25 includes a plurality of blades 20, 20,... Extending in the axial direction across the pair of shrouds 21, 22 along the circumferential direction of the fan air outlet 25. Arranged radially. Furthermore, a stay 27 including three support rods 27 a to 27 c extending radially from the boss 28 is provided at an axially intermediate position between the first shroud 21 and the second shroud 22.
[0039]
  As shown in FIG. 3, the centrifugal fan X2 configured in this way has the first fan suction port 23 as the first suction port 2A and the second fan suction port 24 as the second suction port 2B. These are arranged with their axial directions facing up and down so as to face each other, and are attached to the motor 11 side by attaching the rotating shaft 11a of the motor 11 to the boss 28, and are driven to rotate by the motor 11. It has come to be.
[0040]
  In the indoor unit Z2 configured to include the both-suction type centrifugal fan X2 as described above, the following operation state is obtained.
[0041]
  That is, when the air conditioner is operated and the centrifugal fan X2 is rotationally driven in the indoor unit Z2, the suction / blow-out action causes the centrifugal fan X2 to flow from the outside air inlet 6 as indicated by the air flow A1. Outside air is introduced to the first fan inlet 23 side, and return air from the room is sucked into the second fan inlet 24 through the inlet 2 as shown by the air flow A2. The introduced outside air and return air are blown out from the fan outlet 25 of the centrifugal fan X2 in a mixed state. At this time, when the air flow passes through the air reforming device 9 or the like, a reforming action such as deodorization is performed, and when passing through the heat exchanger 10, the air flow between the air circulation device 9 and the internal circulation refrigerant The temperature is adjusted by heat exchange, and finally, as shown by an air flow A3 as warm air or cold air, the room is heated or cooled by being blown out from the outlet 3 into the room.
[0042]
  Thus, by introducing the outside air in parallel with the return air suction, indoor ventilation is appropriately performed, and comfortable indoor air conditioning is realized. In this case, the centrifugal fan X2 is a double-suction fan, and outside air and return air are sucked from the two fan inlets 23 and 24 provided above and below the centrifugal fan X2, respectively. Therefore, there is almost no interference between the outside air and the return air, and the ratio between the outside air amount and the return air amount, that is, the ventilation characteristic is stabilized.
[0043]
  On the other hand, FIG. 6 shows a centrifugal fan X3 as a modification of the centrifugal fan X2. The centrifugal fan X3 is based on the configuration of the centrifugal fan X2, and in this configuration, the auxiliary fan 14 is provided inside the first fan suction port 23. Here, the auxiliary fan 14 is an axial fan or a diagonal flow configured to perform a suction function when the centrifugal fan X3 exhibits a blowing action, while performing a suction function when the centrifugal fan X3 rotates in a reverse direction. It is considered a fan.
[0044]
  Therefore, in the centrifugal fan X3 provided with the auxiliary fan 14, when the centrifugal fan X3 rotates forward, the air blowing action by the auxiliary fan 14 is added to the centrifugal air blowing action by the blade 20 provided in the centrifugal fan X3. As compared with the case where the auxiliary fan 14 is not provided, the static pressure of the blown air can be further increased, and the air blowing capacity can be improved accordingly. On the other hand, when the centrifugal fan X3 is reversely rotated, the centrifugal fan X3 hardly performs a blowing action, but the auxiliary fan 14 has an internal space 42 of the indoor unit Z3 as shown by an air flow A4. Exhaust action of blowing the side air out of the first suction port 2A. As a result, by applying the centrifugal fan X3 provided with the auxiliary fan 14 to the indoor unit Z2, a comfortable air-conditioning characteristic having a ventilation action by introducing outside air is ensured during the forward rotation of the centrifugal fan X3. When the centrifugal fan X3 is rotated in the reverse direction, as shown by the air flow A4 in FIG. 3, the indoor air is exhausted, so that the comfort of the air conditioning is further promoted and the addition of the indoor unit Z2 by the multifunctional function is performed. Value will be further increased.
[0045]
    Third embodiment
  FIG. 7 shows a ceiling-embedded indoor unit Z3 as an embodiment of an air conditioner according to the present invention. The indoor unit Z3 is based on the indoor unit Z2 according to the second embodiment, and is more compact and lower in cost than the indoor unit Z2. That is, in the indoor unit Z3 of this embodiment, the ceiling wall portion of the casing 1 has a double wall structure composed of the top plate 1A and the top plate 1B, and the outside air introduction path 13 is configured by the space between the two walls. On the other hand, the ceiling wall portion of the casing 1 is composed of a single top plate 1A, and the top suction port 2A is formed in the top plate 1A, as in the conventional structure. A passage forming member 12 having a size enough to cover the first suction port 2A is disposed on the upper side of the plate 1A, and the lower space of the passage forming member 12 is utilized as the outside air introduction passage 13. is there.
[0046]
  Of course, in the indoor unit Z3 of this embodiment, the same effect as that of the indoor unit Z2 in the second embodiment can be obtained, and instead of the centrifugal fan X2, FIG. Of course, the centrifugal fan X3 provided with the auxiliary fan 14 can be applied.
[0047]
    Fourth embodiment
  FIG. 8 shows a ceiling-embedded indoor unit Z4 as an embodiment of an air conditioner according to the present invention. This indoor unit Z4 has the basic configuration of the indoor unit Z2 according to the second embodiment, and the aperture ratio variable mechanism 15 having the same configuration as that described in the first embodiment is provided with the second suction unit. It is arranged on the side of the mouth 2B so that the opening ratio of the second suction port 2B can be adjusted up and down by the opening ratio variable mechanism 15.
[0048]
  Thus, by providing the opening ratio variable mechanism 15 on the second suction port 2B side, the opening ratio of the second suction port 2B is appropriately changed and set, and the amount of return air from the second suction port 2B is set. The amount of outside air from the first suction port 2A can be relatively increased or decreased, and as a result, for example, indoor air conditioning can be achieved by increasing or decreasing the ventilation amount corresponding to the contamination state of the indoor air. It is possible to further promote comfort.
[0049]
  Note that, here, the variable aperture ratio mechanism 15 provided only on the second suction port 2B side is shown as an example, but instead of such a configuration, for example, the variable aperture ratio mechanism 15 is replaced with the first suction port. It is also possible to employ a configuration that is arranged only on the side of the mouth 2A, or that is arranged on both the first suction port 2A and the second suction port 2B.
[0050]
    Fifth embodiment
  9 and 10 show a ceiling-embedded indoor unit Z5 as an embodiment of an air conditioner according to the present invention. This indoor unit Z5 has the basic configuration of the indoor unit Z2 according to the second embodiment, and is different from this in the structure of the centrifugal fan X4 provided therein. That is, the centrifugal fan X4 employed in the indoor unit Z5 has the first shroud 21 provided with the first fan inlet 23 and the first fan provided with the second fan inlet 24 as shown in FIG. The two shrouds 22 are arranged opposite to each other, and a plurality of blades 20, 20,... Are provided between the two shrouds 22, and the stay 27 is provided at a substantially central position in the axial direction. The following partition plate 31 is attached to the configuration.
[0051]
  The partition plate 31 is disposed at a lower position of the stay 27 (that is, an intermediate position between the stay 27 and the second shroud 22) by sewing between the blades 20, 20,. It is composed of a plate-like body that is movable in the axial direction of the centrifugal fan X4. Therefore, by attaching the partition plate 31, the internal empty chamber 42 of the centrifugal fan X 4 has the first internal empty space 42 A facing the first fan intake port 23 in the axial direction and the second fan intake port. The second internal vacant space 42B facing the 24 side is partitioned. The volume ratio between the first internal vacant space 42A and the second internal vacant space 42B partitioned by the partition plate 31 changes as the partition plate 31 moves in the vertical direction (arrow ab direction). It will be.
[0052]
  In this embodiment, the movement of the partition plate 31 is realized by devising the structure on the motor 11 side. Specific examples of the structure on the motor 11 side are shown in FIGS. Will be described with reference to FIG.
[0053]
  In FIG. 12, the rotating shaft 11a of the motor 11 composed of the rotor 35 and the stator 36 has a hollow shaft structure, and the stay 27 of the centrifugal fan X4 is attached to the rotating shaft 11a.
While the partition plate 31 is fixed through the boss 28, a slide shaft 38 is fitted and disposed in the hollow of the rotary shaft 11a, and a coil 37 is provided outside the rotary shaft 11a. The partition plate 31 is fixed to one end of the plate through a boss 32. According to this configuration, when the coil 37 is energized or interrupted, the slide shaft 38 is moved in the axial direction by the relative relationship between the magnetic attraction force of the coil 37 and the dead weight on the partition plate 31 side. Thus, the arrangement position of the partition plate 31 can be variably set in the vertical direction.
[0054]
  13 has the same basic configuration as the motor 11 shown in FIG. 12 described above. However, in the motor 11 shown in FIG. 12, the coil 37 is connected to the lower side of the rotor 35 and the stator 36 ( In other words, the coil 37 is disposed on the upper side of the rotor 35 and the stator 36 (in other words, on the side far from the partition plate 31), whereas the coil 37 is disposed on the side closer to the partition plate 31). The operation is the same as that shown in FIG.
[0055]
  In the indoor unit Z5 including the centrifugal fan X4 having the above-described configuration, as shown in FIG. 9, when the air conditioner is operated and the centrifugal fan X4 is rotationally driven in the indoor unit Z5, Due to the suction / blow-out action, outside air is introduced from the outside air inlet 6 to the first fan inlet 23 side of the centrifugal fan X4 as shown by the air flow A1, and the inlet as shown by the air flow A2. 2, return air from the room is sucked into the second fan inlet 24 side. The introduced outside air and return air are blown out from the fan outlet 25 of the centrifugal fan X4 in a mixed state. At this time, when the air flow passes through the air reforming device 9, reforming action such as deodorization is performed, and when it passes through the heat exchanger 10, heat is generated between the air flow and the internal circulation refrigerant. The temperature is adjusted by the replacement, and finally the room is heated or cooled by being blown out from the outlet 3 into the room as warm air or cold air as indicated by the air flow A3. This is the basic operation.
[0056]
  In addition to the above basic operation, the indoor unit Z5 of this embodiment includes the partition plate 31 in the centrifugal fan X4 as described above, and the centrifugal fan X4 has a position corresponding to the position of the partition plate 31. Since the volume ratio between the first internal chamber 42A and the second internal chamber 42B of the internal chamber 42 can be changed, the outside air from the first fan suction port 23 side can be changed by the volume ratio. The air volume ratio with the return air from the second fan inlet 24 side is determined, and the air volume ratio itself can be changed and set. As a result, the ventilation characteristics governed by the ratio of the amount of outside air from the first fan inlet 23 and the amount of return air from the second fan inlet 24 can be set to, for example, the environmental conditions of the ventilation space or the preference of indoor residents. It is possible to change and set arbitrarily according to the above, and as a result, more comfortable ventilation air conditioning is realized.
[0057]
  The centrifugal fan X4 includes an axial fan or a fan connected to the first fan suction port 23 and the second fan suction port 24 in the same manner as the centrifugal fan X3 described in the second embodiment (see FIG. 6). Auxiliary fan 14 composed of a mixed flow fan can be provided to cause room air to be discarded.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of an air conditioner according to the present invention.
2 is a perspective view showing the structure of the aperture ratio variable mechanism shown in FIG. 1. FIG.
FIG. 3 is a cross-sectional view showing a second embodiment of an air conditioner according to the present invention.
4 is an enlarged cross-sectional view showing a first structure example of a blower fan applied to the air conditioner shown in FIG. 3;
FIG. 5 is a VV reduced arrow view of FIG.
6 is an enlarged sectional view showing a second structure example of the blower fan applied to the air conditioner shown in FIG. 3;
FIG. 7 is a cross-sectional view showing a third embodiment of the air-conditioning apparatus according to the present invention.
FIG. 8 is a cross-sectional view showing a fourth embodiment of an air conditioner according to the present invention.
FIG. 9 is a cross-sectional view showing a fifth embodiment of an air conditioner according to the present invention.
10 is an operation change diagram of the air conditioner shown in FIG. 9. FIG.
11 is an enlarged cross-sectional view showing a structural example of a blower fan applied to the air conditioner shown in FIG. 9;
12 is a cross-sectional view showing a first structural example of a motor applied to the blower fan shown in FIG. 11. FIG.
13 is a cross-sectional view showing a second structural example of a motor applied to the blower fan shown in FIG. 11. FIG.
FIG. 14 is a cross-sectional view showing the structure of a conventional air conditioner.
FIG. 15 is a cross-sectional view showing the structure of a conventional air conditioner.
[Explanation of symbols]
  1 is a casing, 2 is an inlet, 2A is a first inlet, 2B is a second inlet, 3 is an outlet, 4 is a grill, 5 is a chamber, 6 is an outside air inlet, 7 and 8 are bellmouths, 9 Is an air reforming device, 10 is a heat exchanger, 11 is a motor, 12 is a passage forming member, 13 is an outside air introduction path, 14 is an auxiliary fan, 15 is an opening ratio variable mechanism, 16 and 17 are openings, and 18 is fan suction. , 19 is a fan outlet, 20 is a blade, 21 is a first shroud, 22 is a second shroud, 23 is a first fan inlet, 24 is a second fan inlet, 25 is a fan outlet, 27 is a stay, 28 is a boss, 31 is a partition plate, 32 is a boss, 35 is a rotor, 36 is a stator, 37 is a coil, 38 is a slide shaft, 41 is a ventilation path, 42 is an internal vacancy, 42A is a first internal vacancy. 42B is the second internal vacancy, A1 is the external air flow, and A2 is the rear Over emissions flow, A3 is airflow A3, the X1~X4 centrifugal fan, is Z1~Z5 a indoor unit.

Claims (3)

A first fan is provided on both sides in the axial direction in the ventilation path (41) from each of the first suction port (2A) and the second suction port (2B) that opens in a coaxial state to the blowout port (3). Both suction type centrifugal fans (X2, X3, X4, X5) each having a suction port (23) and a second fan suction port (24) are arranged, and the centrifugal fans (X2, X3, X4, X5) ) Facing the fan outlet (25), the heat exchanger (10) is disposed, the first inlet (2A) is in the outside air introduction path (13), and the second inlet (2B) is in the indoor space. , While letting each face
In the internal vacant space (42) of the centrifugal fan (X2, X3, X4, X5), the internal vacant space (42) and the first internal vacant space (42A) facing the first suction port (2A) It is possible to change the volume ratio between the first internal vacancy (42A) and the second internal vacancy (42B) while partitioning into the second internal vacancy (42B) facing the second suction port (2B). An air conditioner characterized in that a partition plate (31) is provided. A first fan is provided on both sides in the axial direction in the ventilation path (41) from each of the first suction port (2A) and the second suction port (2B) that opens in a coaxial state to the blowout port (3). Both suction type centrifugal fans (X2, X3, X4, X5) each having a suction port (23) and a second fan suction port (24) are arranged, and the centrifugal fans (X2, X3, X4, X5) ) Facing the fan outlet (25), the heat exchanger (10) is disposed, the first inlet (2A) is in the outside air introduction path (13), and the second inlet (2B) is in the indoor space. , While letting each face
The outside air introduction path (13) is composed of a space between walls obtained as a double wall (1A, 1B) as a wall surface of the casing (1) provided with the first suction port (2A),
In the internal vacant space (42) of the centrifugal fan (X2, X3, X4, X5), the internal vacant space (42) and the first internal vacant space (42A) facing the first suction port (2A) It is possible to change the volume ratio between the first internal vacancy (42A) and the second internal vacancy (42B) while partitioning into the second internal vacancy (42B) facing the second suction port (2B). An air conditioner characterized in that a partition plate (31) is provided. A first fan is provided on both sides in the axial direction in the ventilation path (41) from each of the first suction port (2A) and the second suction port (2B) that opens in a coaxial state to the blowout port (3). Both suction type centrifugal fans (X2, X3, X4, X5) each having a suction port (23) and a second fan suction port (24) are arranged, and the centrifugal fans (X2, X3, X4, X5) ) Facing the fan outlet (25), the heat exchanger (10) is disposed, the first inlet (2A) is in the outside air introduction path (13), and the second inlet (2B) is in the indoor space. , While letting each face
The outside air introduction path (13) is constituted by a passage forming member (12) arranged so as to cover the first suction port (2A) portion from the outside,
In the internal vacant space (42) of the centrifugal fan (X2, X3, X4, X5), the internal vacant space (42) and the first internal vacant space (42A) facing the first suction port (2A) It is possible to change the volume ratio between the first internal vacancy (42A) and the second internal vacancy (42B) while partitioning into the second internal vacancy (42B) facing the second suction port (2B). An air conditioner characterized in that a partition plate (31) is provided.

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