CN1304791C - Air conditioner - Google Patents

Abstract

The present invention relates to an air conditioner capable of performing a ventilation operation. When the air intake operation is performed, outdoor air is introduced into the room, but when the outdoor air is contaminated with various substances, discomfort is given to the living people. To solve this problem, it is conceivable to introduce outdoor air into the room through a filter. When an air cleaning filter is provided in the air intake and exhaust unit, the width of the air intake and exhaust unit is increased, and the heat exchanger must be correspondingly reduced, and the temperature and humidity adjustment capability, which is the basic purpose of the conventional air conditioner, is lowered. Without changing the size of the heat exchanger, the shape of the indoor unit becomes large. The air conditioner of the invention is provided with an air inlet filter (21) for outdoor air to pass through during air inlet operation, the rotating shaft of a sub fan (19) and the rotating shaft of a main fan (9) are arranged in parallel, and the angle between the air suction surface of the sub fan (19) and the air passing surface of the air inlet filter (21) is arranged not to form a right angle.

Description

air conditioner

technical field

The present invention relates to an air conditioner capable of ventilation operation.

Background technique

In recent years, it has been pointed out that the airtightness between living areas of family houses has increased, and that harmful substances contained in building materials have an impact on the human body. In addition, there is a problem that the concentration of carbon dioxide in the living space increases due to an increase in airtightness. These problems have all become problems to be solved by air conditioners that need to adjust the indoor air.

Such an air conditioner is described in Unexamined-Japanese-Patent No. 2000-274727 (patent document 1). This patent document 1 discloses a split-type air conditioner, which is equipped with a fan that can switch forward and reverse rotation in one ventilation duct, and has an exhaust function that discharges indoor air to the outside by switching the rotation direction of the fan. , A unit with an air intake function that draws outdoor air into the room.

The air intake and exhaust unit described in the above-mentioned Patent Document 1 uses the auxiliary fan (the main fan is a DC fan used for ventilation in the heat exchanger of the indoor unit of the air conditioner, and the fan for air intake and exhaust is called an auxiliary fan accordingly). The rotation direction of the fan is changed from forward to reverse to switch the air supply direction, so as to perform exhaust operation and intake operation.

When the air intake operates, although the outdoor air is introduced into the room, if the outdoor air is polluted by various substances, the residents therein will feel uncomfortable. To solve this problem, consider using a filter to bring outside air into the room. The above-mentioned Patent Document 1 solves this problem by making the auxiliary fan of the air conditioner pass air through an air-cleaning filter provided in the delivery duct during forward rotation and reverse rotation.

However, as in this patent document 1, if the ventilation surface of the air cleaning filter is arranged parallel to the drive shaft of the sub-fan to make the air cleaning filter have corresponding performance, the area of the air cleaning filter must be enlarged. In this way, to increase the width of the intake and exhaust unit, the heat exchanger must be reduced accordingly, thereby reducing the temperature and humidity adjustment capability that is the basic purpose of the air conditioner. In the case where the size of the heat exchanger is not changed, there arises a problem that the shape of the indoor unit becomes larger.

In addition, in the case of exhaust operation in which indoor air is exhausted to the outside, since the air exhausted to the outside passes through the air cleaning filter, there is a problem that the ventilation resistance at the time of exhaust is increased and the amount of exhausted air is reduced.

In addition, the air conditioner of Patent Document 1 does not take into account the maintainability of the filter and the inside of the delivery pipe arranged in the sub-fan unit.

In addition, the air conditioner of Patent Document 1 does not take into account the situation when the auxiliary fan stops operating.

In addition, the air conditioner of Patent Document 1 has only the modes of intake operation and air supply operation, and does not consider other operations of the sub-fan.

In addition, the air conditioner in Patent Document 1 does not take into consideration that insects enter the intake and exhaust ducts passing through the outdoors.

Contents of the invention

A first object of the present invention is to provide an air conditioner including a sub-fan having an intake function and an exhaust function, and a thin sub-fan unit including an air cleaning filter.

A second object of the present invention is to provide an air conditioner including a sub-fan having an intake function and an exhaust function, which reduces ventilation resistance during exhaust operation.

The above-mentioned first object is achieved in the following manner: in the air conditioner, there is an air suction port and an air blowing port formed in a rectangular indoor unit, and an air duct is arranged between the air suction port and the air blowing port and forms an air duct. a main fan, a heat exchanger for operating the main fan and exchanging heat with the indoor air sucked in from the air inlet, a filter provided on the upstream side of the air flow of the heat exchanger, and a filter provided in the indoor unit, And the housing that connects the indoor opening that opens indoors and the outdoor opening that opens outdoors, thereby forming an air duct inside, is arranged on the air duct in the housing, and has the function of sucking outdoor air into the room by rotating. The intake and exhaust unit of the auxiliary fan and the auxiliary fan motor for the air intake operation or the exhaust operation of discharging indoor air to the outside is characterized in that it is at least provided with an air intake filter through which the outdoor air passes during the above air intake operation. The rotation axis of the auxiliary fan and the rotation axis of the main fan are arranged approximately in parallel, and the angle between the air intake surface of the auxiliary fan and the air passage surface of the intake filter is not at right angles.

The above-mentioned second object is achieved in the following manner: in the air conditioner, there is an air inlet and an air outlet formed in a rectangular indoor unit, and an air duct is arranged between the air inlet and the air outlet and forms an air duct. a main fan, a heat exchanger for operating the main fan and exchanging heat with the indoor air sucked in from the air inlet, a filter provided on the upstream side of the air flow of the heat exchanger, and a filter provided in the indoor unit, And the housing that connects the indoor opening that opens indoors and the outdoor opening that opens outdoors, thereby forming an air duct inside, is arranged on the air duct in the housing, and has the function of sucking outdoor air into the room by rotating. The intake and exhaust unit of the auxiliary fan and the auxiliary fan motor for the air intake operation or the exhaust operation of discharging indoor air to the outside is characterized in that it is at least provided with an air intake filter through which the outdoor air passes during the above air intake operation. , during the air intake operation, outdoor air is sucked into the room through the air intake filter, and during the exhaust air operation, indoor air is discharged to the outside without passing through the air intake filter.

Description of drawings

Fig. 1 is the exterior view of the air conditioner indoor unit of an embodiment of the present invention;

Fig. 2 is an appearance diagram of a state in which the decorative panel of the indoor unit in Fig. 1 is removed;

Fig. 3 is the A-A sectional view of Fig. 1;

Fig. 4 is the B-B sectional view of Fig. 1;

Fig. 5 is an appearance diagram of the auxiliary fan unit;

Fig. 6 is a perspective view omitting the right side plate of the auxiliary fan unit of Fig. 5;

7 is a perspective view omitting a part of the left side panel of the auxiliary fan unit of FIG. 5;

Fig. 8 schematically represents the air flow diagram of the auxiliary fan unit shown in Fig. 2;

Fig. 9 is a diagram showing the operating state of the auxiliary fan unit shown in Fig. 2;

Fig. 10 is a diagram showing the flow of air in the sub-fan unit during intake operation;

Fig. 11 is a diagram showing the flow of air in the sub-fan unit during exhaust operation;

Fig. 12 is a diagram showing the air flow in the auxiliary fan unit during circulation operation;

Fig. 13 is an explanatory diagram of a combined use of cooling operation of the indoor unit and circulation operation or air intake operation of the sub-fan unit in Fig. 1;

Fig. 14 is an explanatory diagram of combined use of the heating operation of the indoor unit in Fig. 1 and the circulation operation or air intake operation of the sub-fan unit;

Fig. 15 is a structural diagram of the air supply duct 12;

FIG. 16 is an explanatory diagram of the outdoor air supply pipe 22;

Fig. 17 is a figure on the occasion of cleaning the auxiliary fan unit 15;

FIG. 18 is a diagram showing the air filter 8 .

Detailed ways

Various embodiments of the air conditioner of the present invention will be described in detail below using the drawings.

The overall structure of the air conditioner will be described using FIGS. 1 to 4 . Fig. 1 is an external view of an indoor unit of an air conditioner according to an embodiment of the present invention, Fig. 2 is an external view of a state in which the decorative panel of the indoor unit of Fig. 1 is removed, Fig. 3 is a sectional view along A-A of Fig. 1 , and Fig. 4 is a diagram 1 B-B sectional view.

The structure of the indoor unit 1 includes a unit case 2 , a decorative panel 3 , and a front panel 4 . The indoor unit 1 is provided with an air intake port 5 for sucking in indoor air with adjusted temperature and humidity, and an air blower port 6 for blowing out indoor air with adjusted temperature and humidity. The air outlet 6 is provided laterally at the lower portion of the indoor unit 1 and constitutes a main outlet with respect to the sub outlet 13 . A rotatable up and down wind direction board 7 is provided in the air outlet 6 . The vertical wind direction plate 7 is used to change the direction of blown air, and is positioned to blow out along the horizontal direction during cooling, and positioned to blow out from below during heating.

The unit case 2 includes an air filter 8 , a main fan 9 , a heat exchanger 10 , and a liquid storage pan 11 . The air filter 8 is arranged so as to cover the suction side of the heat exchanger 10 for removing dust contained in the sucked room air. The main fan 9 is composed of a horizontal DC fan, and is arranged in the center of the indoor unit 1 so that indoor air is sucked in from the air inlet 5 and blown out from the air outlet 6 . The heat exchanger 10 is disposed on the suction side of the main fan 9 and has a substantially inverted V shape. The liquid storage pan 11 is disposed below the lower ends of the front and rear sides of the heat exchanger 10, and is configured to receive condensed water generated in the heat exchanger 10 during cooling operation or dehumidification operation, and discharge it to the outside. Thereby, the main passage for air-conditioning room air flow is formed. That is, by operating the main fan 9 , indoor air is sucked in from the air inlet 5 , passed through the air filter 8 , exchanged heat by the heat exchanger 10 , and blown out from the air outlet 6 into the room.

The sub fan unit 15 is provided at one side inside the indoor unit 1 . Specifically, the auxiliary fan unit 15 is assembled on a side opposite to the main fan motor 14 of the main fan 9 .

The sub-fan unit 15 has a sub-suction port 16 for sucking indoor air at its front. The auxiliary suction port 16 is located behind the heat exchanger and the common air filter 8 , and sucks the indoor air sucked in from the air suction port 5 through the air filter 8 . In short, due to the sub-fan unit 15, it is possible not to provide a dedicated air suction port in the indoor unit 1, and reduce the number of parts by sharing it with the air suction port 5 for sucking indoor air into the heat exchanger 10.

The air supply duct 12 communicates with the auxiliary fan unit 15 , and the auxiliary air outlet 13 is provided on the air supply duct 12 . Specifically, the air supply duct 12 is located above the air outlet 6 and in front of the liquid storage pan 11 , and extends laterally to the center of the indoor unit 1 . At the front end of the air duct 12 , in other words, at the upper part of the center of the air outlet 6 , the sub outlet 13 is provided. As a result, the air blown into the room from the sub-fan unit 15 is sent to the air duct 12 from the indoor blower unit 17 , and is blown out into the room from the sub-air outlet 13 located at the front end of the air duct 12 .

While the auxiliary fan unit 15 discharges indoor air to the outside, it has an intake and exhaust port 18 at the rear for sucking in fresh outdoor air. In addition, an outdoor delivery pipe 22 (Fig. 16) is connected to the intake and exhaust port 18, and the outdoor delivery pipe 22 is drawn out through the pipe hole of the room together with the refrigerant pipeline connecting the indoor unit 1 and the outdoor unit (not shown). To the outside, the front end of the outdoor delivery pipe 22 leads to the atmosphere, and the refrigerant pipeline is connected with the outdoor unit.

In addition, in this embodiment, the main fan motor 14 is arranged on the right side of the indoor unit 1, and the auxiliary fan unit 15 is arranged on the left side. If they are arranged in reverse, the same effect can be obtained. In addition, the indoor unit 1 does not have left-right symmetry when viewed from the front, and the sub-fan unit 15 may be disposed on the side where the main fan 14 is disposed.

Next, the structure and function of the sub-fan unit 15 are demonstrated using FIGS. 5-7. 5 is an external view of the sub-fan unit, FIG. 6 is a perspective view omitting the right side plate of the sub-fan unit in FIG. 5 , and FIG. 7 is a perspective view omitting a part of the left side plate of the sub-fan unit in FIG. 5 .

The structure of the auxiliary fan unit 15 is that the upper half of its internal space is used as a blower unit, and the lower half is equipped with various filters, and the width dimension can be reduced without enlarging the width dimension of the indoor unit 1 by arranging them in the up and down direction. Accordingly, the sub-fan unit 15 can be accommodated in the indoor unit 1 .

The auxiliary fan 19 is constituted by a centrifugal fan such as a multi-blade fan or a turbo fan, and does not generate reverse wind even if it rotates in the reverse direction. Even narrow air ducts can achieve high air flow with axial fans.

The blower part that is positioned at the upper half of sub-fan unit 15 is equipped with sub-fan 19, drives the sub-fan motor 20 of sub-fan 19, forms the casing 15a of the air suction side of sub-fan 19, forms the wind of the air blowing side of sub-fan 19. At the same time, the outlet side casing 15b that accommodates the auxiliary fan 19 and the auxiliary fan motor 20, the seal ring 27 that separates the suction side casing 15a and the outlet side casing 15b, and the damper 129 on the suction side of the suction side casing 15a , the auxiliary suction port 16 for inhaling indoor air, and the intake and suction port 24a communicating with the intake and exhaust ports 18 . Open any one of the auxiliary suction port 16 and the intake suction port 24a by adjusting the action of the damper 129, and close the other side.

In addition, the sub-fan 19 and the sub-fan motor 20 are accommodated in the blow-out side case 15b, and the movement of the air flow from the suction-side case 15a to the blow-out side case 15b is performed by the sub-fan 19 . The sub-fan 19 is constituted by a centrifugal fan that sucks in air from the longitudinal direction of the indoor unit 1 , that is, the axial direction, and blows it out in the circumferential direction. Unlike the propeller fan which blows out the sucked air along the fan axis, the centrifugal fan blows the sucked air out along the circumferential direction, so the fan axial width of the auxiliary fan unit 15 can be reduced. The sub-fan motor 20 is assembled in the concave portion of the sub-fan 19 so that the width dimension of the sub-fan unit 15 is reduced. By making the adjustment damper 129 that is arranged on the suction side housing 15a act, the auxiliary suction port 16 or the intake suction port 24a opening in the room is opened, and the other side is cut off.

The lower half of the sub-fan unit 15 is equipped with: removes the dust contained in the air and removes harmful substances to the human body, a fine-pore intake filter 21 used in an air cleaner, and a pre-filter 21 for removing dust in the air. The filter 33, the indoor blower 18 that induces air to the sub-air outlet 13, the intake and exhaust port 18 that discharges polluted indoor air to the outside or sucks fresh outdoor air into the room, and introduces the blown air from the sub-fan 19 into the room Air intake circulation duct 26, the damper II 31 for switching the duct and controlling the air flow. The lower half of the sub-fan unit 15 is the same as the upper half, and is divided into left and right spaces in the height direction when viewed from the front. Switch the air passage of the air flow by making the adjustment damper II 31 act, form the open exhaust air passage 23 and cut off the air intake circulation air passage 26, and the air blown from the auxiliary fan 19 is communicated with the air passage or the air inlet and exhaust port 18. The exhaust air duct 23 is an air duct that opens the air intake circulation air duct 26 and communicates with the indoor blowing part 17 .

The air intake filter 21 is constituted by a filter part with pores of 0.5 to 1.0 μm for filtering dust and the like, and an adsorption part (specifically, activated carbon) for adsorbing ozone. In order to increase the filter area and reduce the ventilation resistance, the sheet-like filter is formed with fine folds (creases). The air intake filter 21 has a function of filtering organic solvents such as fine particles, cigarette smoke, and toluene contained in the exhaust gas of a diesel vehicle.

In addition, in this embodiment, when outdoor air is drawn into the room, it is drawn into the room through the air intake filter 21 . In recent years, in urban areas, the outdoor atmosphere tends to be polluted, and various pollutants float in the air. In addition, even in the suburbs, there are major causes of air pollution such as floating and vaporized organic solvents and soot from suspended incineration caused by nearby exterior wall painting work. In such an environment, if outside air is brought in, pollutants will be sucked into the room, making the occupants uncomfortable.

Therefore, the air conditioner of this embodiment can select the air intake operation manually or automatically, and when the auxiliary fan unit 15 (ventilation unit) is activated to introduce outdoor air, the air intake filter 21 removes the filter capacity. Substances that can be removed within the range and provided indoors.

Therefore, when the outdoor air is polluted by the above-mentioned pollutants, since the outdoor air can be sucked into the room after being converted into clean air, the uncomfortable feeling caused by the introduction of the outdoor air can be reduced.

In addition, as will be described later, the operation of the sub-fan unit 21 includes, in addition to an intake operation for introducing outdoor air, an exhaust operation for exhausting indoor air to the outside, and a cycle operation for sucking in indoor air and returning it indoors. However, the exhaust operation and the circulation operation perform exhaust or circulation without passing through the intake filter 21 .

In addition, if the air intake filter 21 has the ability to capture viruses with a size of 0.3 μm to 3 μm, it can prevent the invasion of external viruses.

As shown in FIG. 6 , the auxiliary fan unit 15 houses, from the top, an auxiliary fan 19 whose rotation axis is substantially parallel to the axis of the main fan 9 , and a pre-filter facing the air passage communicated with the intake and exhaust ports 18 . 33, and the air intake surface facing the ventilation surface and the auxiliary fan 19 is in the same direction, in other words, the vertical line of the ventilation surface when it is not folded is roughly parallel to the drive shaft of the auxiliary fan 19. Air intake filter twenty one. Like this, especially by arranging the auxiliary fan 19 and the filter 21 for intake, the width of the auxiliary fan unit 15 can be reduced, and even if the width of the indoor unit 1 is not too thick, the auxiliary fan unit 15 can also be accommodated in the indoor unit 1. middle. The ventilating surface of secondary fan 19 is made not at right angles with the ventilating surface of filter 21 for air intake. It is best to make the vertical lines on both sides parallel to make it thinner.

In addition, since the pre-filter 33 is mainly used to remove the larger particles of dust that enter together with the outdoor air during air intake, if it has the same area as the opening surface of the intake and exhaust ports 18, it will be blocked immediately. Therefore, in the present embodiment, as shown in Figure 6, the intake and exhaust duct 25 as a space is set, which communicates with the intake and exhaust ports 18 from the intake and exhaust ports 18 opened on the back to the front, and its transverse wall surface is formed by suction. The side housing 15a and its cover (suction side housing cover 15c shown in FIG. 5 ) are formed, and its upper wall is formed from the upper side end surface of the intake and exhaust port 18 to the intake and exhaust air duct top plate on the front side. 25a, and its lower surface is formed by a pre-filter 33 installed between the space formed on the suction side of the air intake filter 21 and the space on the side of the intake and exhaust air duct top plate 21a. Accordingly, the area of the prefilter 33 can be enlarged, and the time until the prefilter 33 is clogged can be extended. Further, because the area of pre-cleaner 33 is increased and the area of filter 21 for intake is enlarged, the intake and exhaust port 18 as the outdoor opening is viewed from the front, and a part or all of it falls into filter 21 for intake. (Accommodating part) In the vertical projection plane, the front side end surface of the intake/exhaust duct 25 is arranged between the auxiliary fan 19 and the intake filter 21 . In this way, by arranging the intake and exhaust ports 18 on the back of the housing portion of the intake filter 21, the cleanability can be enhanced as will be described later. That is, the intake/exhaust duct 25 curves downward as it goes from the end surface on the front side to the intake/exhaust port 18 on the rear side. In this way, in addition to the above effects, the effect of enlarging the opening area of the intake and exhaust ports 18 can also be achieved. The front side end face of the intake and exhaust air passage is blocked by the opening of one end of the inside elongated prefilter 33 by the intake and exhaust air passage cover 33b of the handle 33a installed on the surface.

When the air intake filter 21 and the pre-filter 33 are inserted into the sub-fan unit 15, they are inserted from the front of the indoor unit 1 in the depth direction. The air intake filter 21 is inserted vertically, and the pre-filter 33 is inserted in the horizontal direction guided by a guide rail not shown, and engaged by the inlay portion 18a. By arranging these filters in the vertical direction, the size of the auxiliary fan 19 in the axial direction can be reduced. In addition, the air intake filter 21 and the pre-filter 33 have the handles 21a and 33a located on the front side of the auxiliary fan unit 15, and if necessary, the front panel 4 of the indoor unit 1 can be opened, and the handles 21a and 33a can be held for removal and installation. . The pre-filter 33 is flexible and arranged from the front of the sub-fan unit 15 toward the depth direction so as to block between the intake and exhaust ports 18 and the intake filter 21 , and is embedded with the inlay portion 18 a of the intake and exhaust ports 18 .

Furthermore, in the present embodiment, although the air intake filter 21 is used not only to remove the dust in the air, but also to remove harmful components to the human body, as a common filter, it is also possible to use a filter with a diameter smaller than that of the pre-filter 33. A fine filter to remove dust, etc. from the air.

Next, the intake operation, exhaust operation, and circulation operation performed by the sub-fan unit 15 will be described with reference to FIGS. 8 and 9 . FIG. 8 is a diagram schematically showing an air flow of the sub-fan unit shown in FIG. 2 , and FIG. 9 is a diagram showing an operating state of the sub-fan unit shown in FIG. 2 .

In the sub-fan unit 15, there are three operation modes of intake operation, exhaust operation, and circulation operation, and a state in which the operation is stopped. In addition, the flow direction of the wind and the opening and closing position of the damper in each operation mode are as shown in FIG. 9 . In addition, in the state where the operation is stopped, of course the wind does not flow, and the damper I 29 and the damper II 31 are respectively located in position (b), preventing the outdoor air from entering the exhaust port 18 to the auxiliary suction port 16 and the indoor blowing part. 17 Invasion into the interior. In addition, although not specifically described, switching of each operation mode is performed manually by the operation part of the remote control switch or by the operation part of the indoor unit 1 in the case of manual switching. In addition, in the case of automatic, it is performed by the instruction|command from the control part which is not shown in figure. If the auxiliary fan unit 15 can operate in parallel with the cooling and heating operation of the indoor unit 1 , the auxiliary fan unit 15 can also operate independently. Further, a timer is set on the sub-fan unit 15, and after running for a certain period of time, it can also stop running automatically.

As shown in FIG. 8, since the auxiliary fan 19 used in the auxiliary fan unit 15 rotates in a certain direction and makes the air flow in the direction of the arrow, the suction side casing 15a, the blowing side casing 15b, the seal ring 27 is made into the shape that only considers air to flow to one direction. Therefore, while the air blowing efficiency of the sub-fan 19 can be improved, the operating noise of the sub-fan 19 can also be reduced.

By adjusting the action of the damper 129, it can be switched to any one of the air duct that inhales the indoor air from the auxiliary suction port 16 or opens the air intake duct 24, and the air duct that inhales the outdoor air from the intake and exhaust ports 18; The action of the damper II 31 can be switched to any one of the air ducts that blow out air from the auxiliary outlet 17 to the room, or from the air intake and exhaust ports 18 to the outdoors; the operation mode of the auxiliary fan unit 15 is switched to Any one of the intake operation, exhaust operation, and circulation operation modes.

That is, in the air intake operation, because the damper I 29 is on the (b) side, covering the auxiliary suction port 16 and opening the air intake duct 24, so the outdoor air is sucked in through the air intake duct 24; because the damper II 31 is at ( a) side, and the air intake circulation air duct 26 is opened to cover the exhaust air duct 23, so the outdoor air blown out to the auxiliary fan blowing part 34 is sent to the air intake circulation air duct 26, passed through the indoor blowing part 17, and sent to the In the air supply duct 12 connected to the indoor blowing part 17 . And, in the case of the present embodiment, the outdoor air sucked by the secondary fan 19 is sucked from the intake and exhaust port 28 through the intake and exhaust duct 25, and after the dust contained in the air is removed on the surface of the pre-filter 33, The surface of the air intake filter 21 removes dust and harmful substances contained in the air, and is introduced into the air intake duct 24 through the intake filter 21 and sucked by the sub fan 19 .

In addition, in the exhaust operation, because the damper I 29 is on the (a) side, the auxiliary suction port 16 is opened and the air intake duct 24 is covered, so the indoor air is sucked in through the auxiliary suction port 16; because the damper II 31 is on the (b) side ) side, so the intake air circulation duct 26 is covered and the exhaust air duct 23 is opened. As a result, the indoor air blown out to the sub-fan blowing unit 34 flows through the exhaust duct 23 , passes through the pre-filter 33 , and is discharged to the outside from the intake and exhaust ports 18 .

In addition, in the cycle operation, because the damper I 29 is located on the (a) side, the auxiliary suction port 16 is opened and the air intake duct 24 is covered, so the indoor air is sucked in through the auxiliary suction port 16; because the damper II 31 is at the (a) side side, so the intake air circulation duct 26 is opened and the exhaust air duct 23 is covered. As a result, the indoor air blown to the auxiliary fan blowing unit 34 is sent to the air intake circulation duct 26 , and sent to the air duct 12 connected to the indoor blowing unit 17 through the indoor blowing unit 17 .

In addition, when the operation stops, when the damper I 29 and the damper II 31 are all on the (b) side, it prevents outdoor air from intruding into the room through the air inlet duct 24 or through the exhaust air duct 23. Therefore, there is no need to provide a backwind prevention valve that prevents the intrusion of outdoor air through the intake and exhaust ducts when the operation is stopped.

Next, details of the intake operation will be described mainly with reference to FIG. 10 .

In the case of air intake operation, because the regulating damper I 29 covers the secondary suction port 16 and opens the intake suction port 24a, the regulating damper II 31 in the auxiliary fan blowing part 34 opens the intake air circulation duct 26 and shields the exhaust air. The air duct 23, so the intake air duct 24 and the intake and exhaust air duct 25 are communicated through the air intake filter 21. Therefore, when the secondary fan 19 is driven in this state, the outdoor air is sucked in from the intake and exhaust ports 18 through the intake and exhaust duct 25, and the sucked outdoor air passes through the prefilter 33 and the filter 21 for intake to flow to the intake duct. twenty four. At this time, when passing through the pre-filter 33 , the dust contained in the air is removed, and when passing through the intake filter 21 again, the dust contained in the air is removed and substances harmful to the human body are removed.

And, the outdoor air sucked into the air intake duct 24 enters the suction side housing 15a from the air intake inlet 24a, is sucked into the auxiliary fan 19 from the sealing ring 27 and is blown out to the blowing side housing 15b, and passes through the auxiliary fan blowing part. 34 flows to the air intake circulation duct 26. The outdoor air flowing into the air intake circulation duct 26 flows into the air supply duct 12 from the indoor blowing part 17, and the temperature of the air flowing inside the air supply duct 12 is adjusted to the temperature of the indoor unit 1 in the operating state, and is sent to the indoor air from the auxiliary air outlet. Provide fresh outdoor air at a regulated temperature to replace the indoor air.

Next, details of the exhaust operation will be described mainly with reference to FIG. 11 .

The indoor air during the exhaust operation is sucked into the sub-inlet 16 after the dust in the air is removed by the indoor air filter 8 (see FIG. 3 ). And, the adjustment damper 129 is in the same position as the cycle operation, the auxiliary suction port 16 is opened and the intake suction port 24a is cut off. Therefore, indoor air is sucked from the auxiliary suction port 16, enters the suction side housing 15a and is sucked in the auxiliary fan 19, and is blown out from around the auxiliary fan 19, collected by the blowing side housing 15b and then blown out to the auxiliary fan blowing part 34.

And, in the case of exhaust operation, because the damper II 31 in the sub-fan blowing part 34 opens the exhaust air duct 23 and blocks the intake air circulation duct 26, so the indoor air blown to the sub-fan blowing part 34 passes through the exhaust. The air duct 23 flows to the intake and exhaust duct 25, and is exhausted from the intake and exhaust port to the outside through the pre-filter 33. Here, on the side of the intake and exhaust port 18 of the pre-filter 33, although the dust removed from the outdoor air during the intake operation is collected, the flow of the indoor air in the pre-filter 33 during the exhaust operation is effective. The dust accumulated on the surface of the intake and exhaust port 8 of the pre-filter 33 can be removed efficiently. Therefore, the sub-fan unit 15 can self-clean the pre-filter 33 by repeating the air-intake operation and the air-exhaust operation, thereby reducing the number of cleanings of the pre-filter 33 . In addition, by automatically switching to the exhaust operation for a certain period of time during the intake operation, the direction of the airflow flowing through the pre-filter 33 can be switched, and clogging can be prevented.

In addition, during the exhaust operation, since the indoor air to be exhausted does not pass through the intake filter 21, the ventilation resistance during the exhaust operation can be reduced, and the amount of indoor air to be exhausted can be increased to efficiently perform the exhaust operation.

The air intake operation and exhaust operation have been explained above. If only the air intake and exhaust are basically performed, the auxiliary fan can be used as a fan that can rotate forward and reverse. The method of not passing through the filter 21 for intake air at the time of exhaust, but the structure is very simple. However, in addition to this, by providing another indoor opening, one dedicated to the intake of indoor air and the other dedicated to blowing out, the cycle operation described below can be performed, and various uses can be expanded.

Next, details of the cycle operation will be described mainly with reference to FIG. 12 .

Indoor air during circulation operation is sucked in from the sub-suction port 16 (see FIG. 4 ). It is omitted in FIG. 12 , and the room air filter 8 (see FIG. 3 ), which removes dust from the room air during cooling and heating operation, is extended to the front of the sub-fan unit 15 (see FIG. 4 ). The indoor air filter 8 also removes dust contained in the air from the indoor air taken in by the sub-suction port 16 .

During cycle operation, because the damper 129 opens the secondary suction port 16 and blocks the intake suction port 24a, the indoor air is sucked from the secondary suction port 16, enters the suction side housing 15a, and is sucked into the secondary fan 19 through the sealing ring 27. , blows out from the periphery of the sub-fan 19 , is collected in the blow-out side casing 15 b, and blows out to the sub-fan blow-out portion 34 . Block the exhaust air passage 23 and open the air intake circulation air passage 26 by the adjusting damper II 31 arranged on the auxiliary fan blowing part 34. As a result, the indoor air blown toward the sub-fan blowing portion 34 flows toward the air intake circulation duct 26 and is blown into the room from the indoor blowing portion 17 .

And, although the air supply duct 12 is not clearly shown in Fig. 12 (a), the air supply duct 12 is shown in Fig. It is sent to the air supply duct 12 as it is. The air supply duct 12 is arranged in front of the liquid storage pan 11 (refer to FIG. 3 ), and the front end of the air supply duct 12 is located at the upper part of the approximate center of the air outlet 6 (refer to FIG. 1 ) of the indoor unit 1, and is sent to the air supply. The indoor air in the duct 12 is blown out from the sub outlet 13 (see FIG. 2 ). Since the air blowing duct 12 is provided on the front portion of the liquid pan 11, it is cooled by the liquid pan 11 during cooling operation and becomes cold, and is heated and warm during the heating operation. The air flowing in the air supply duct 12 is also pre-cooled or pre-heated in a corresponding state through respective operating states, and is blown out from the air outlet 13 into the room. Therefore, even when the auxiliary fan unit 15 operates in the circulation operation mode, the air volume during the cooling operation or the heating operation increases because the air that has been precooled or preheated to the temperature of the respective operating states is transferred from the auxiliary fan unit 15 to the air circulation operation mode. Since air is blown out from the air outlet 13, it is possible to improve the cooling capacity or the heating capacity at the time of each operation.

As explained above, because the auxiliary fan 19 of the auxiliary fan unit 15 of the present invention rotates in a certain direction, the shape of the sealing ring 27 or the shape of the suction side housing 15a and the shape of the blowing side housing 15b can adopt a reasonable configuration corresponding to the auxiliary fan 19. Therefore, the auxiliary fan unit 15 with high air blowing efficiency and low running noise can be obtained. Further, the sub-fan motor 20 for driving the sub-fan 19 is arranged in the concave portion provided on the sub-fan 19, on the same plane surrounding the blow-out side casing 15b of the sub-fan 19 (that is, on the outer periphery of the blow-out side casing 15b). Exhaust air duct 23, air intake air duct 24 and air intake circulation air duct 26 are arranged on the outside of the surface), and constitute a smaller air supply mechanism with a width dimension. Further, the air intake filter 21 can be arranged at the lower part of the blower mechanism to reduce the width of the auxiliary fan unit 15, so that the auxiliary fan unit 15 can be accommodated in the indoor unit without increasing the width of the indoor unit. 1 in.

Next, the effects of combining the cooling and heating operation of the indoor unit 1 and the operation mode of the sub fan unit 15 will be described with reference to FIGS. 13 and 14 . Fig. 13 is an explanatory diagram of the combined use of the indoor unit in Fig. 1 for the cooling operation and the circulation operation of the auxiliary fan unit or the air intake operation, and Fig. 14 is the combined use of the heating operation of the indoor unit in Fig. 1 and the circulation of the auxiliary fan unit Explanatory diagram of operation or air intake operation.

In FIG. 13 , when the indoor unit 1 performs cooling operation and the auxiliary fan unit 15 performs circulation operation or air intake operation, during the period when the air blown from the auxiliary outlet 13 flows through the air duct 12, the air duct 12 Since it is cooled by the liquid storage pan 11 and becomes cold, the blown air is cooled by the blowing duct 12 . Then, the air cooled by the blower duct 12 is blown out substantially horizontally in the direction of the arrow A from the sub blower port 13 provided at the upper center of the air blower port 6 of the indoor unit 1 . On the other hand, in the cooling operation of the indoor unit 1, the cooled cold air is blown out from the air outlet 6 according to the direction of the arrow B, and the cold air is sent to the far distance of the room to cool the whole room.

In FIG. 13 , since the cooling air of the cooling operation is added with the circulation operation of the auxiliary fan unit 15 or the cooling air of the air intake operation, the air volume of the cooling air can be increased, thereby rapidly cooling the room. Alternatively, the cooling capacity can be kept the same, and the air volume sent by the auxiliary fan unit 15 can be used to reduce the air volume of the cooling operation to reduce the noise during the cooling operation. In addition, since the air is blown out substantially horizontally from the auxiliary outlet 13, the upper space in the room is covered, so the cool air blown out from the air outlet 6 can be effectively used in the living space in the lower part of the room.

In addition, in FIG. 14 , when the indoor unit 1 is performing heating operation and the sub-fan unit 15 is performing circulation operation or intake operation, the air blown from the sub-air outlet 13 flows through the inside of the air duct 12, because The air supply duct is heated by the liquid storage pan 11 and becomes hot, so the blown air is heated by the air supply duct 12 . Then, the air heated by the blowing duct 12 is blown out substantially horizontally in the direction of the arrow A from the sub blower port 13 provided at the upper center of the air blower port 6 of the indoor unit 1 .

On the other hand, the warm air heated by the heating operation of the indoor unit 1 and blown out from the air outlet 6 tends to float upward continuously due to its light specific gravity. Therefore, the warm air in the heating operation is blown downward from the air outlet 6 in the direction of the arrow B, and first heats the floor of the house, and controls the warm air to rise to the upper part of the house, thereby warming the living space in the house. . When there was no warm air blown out from the sub-air outlet 13 before, the warm air blown from the air outlet 6 starts to rise in the direction of the arrow B as the speed of the warm air slows down, and the warm warm air cannot reach the room. In the distance, light and warm air will be trapped in the upper space of the house.

However, in the indoor unit 1 of the present embodiment, since the warm air is blown out substantially horizontally from the sub-air outlet 13 arranged in the upper part of the air outlet 6 in the direction of the arrow A, it will rise in the direction of the arrow A. The warm air in the heating operation in the B direction is formed on the cover, and the warm air in the heating operation is induced to a remote place in the room by the warm air blown out from the sub-air outlet 13 . Therefore, even during the heating operation of the indoor unit 1, the circulation operation and the intake operation of the sub-fan unit 15 are used simultaneously, so that the heating operation can be performed more efficiently.

As explained above, since the air supply duct 12 is arranged in front of the liquid storage pan 11, when the heat exchanger 10 of the indoor unit 1 is cooled by the cooling operation, it receives the condensed and cooled discharge water, and the liquid storage pan 11 is cooled. , the air supply duct 12 arranged in front of it is cooled by the liquid storage pan 11 and becomes cold, so that the air flowing therein is cooled. Therefore, during the cooling operation, even if hot outdoor air is supplied to the room, it is cooled by the air supply duct 12 and blown into the room in advance, which does not seriously hinder the cooling effect.

In addition, when the heat exchanger 10 of the indoor unit 1 is heated by the heating operation, the temperature of the liquid storage pan 11 is directly heated, and the temperature of the air supply duct 12 arranged in front of it is raised by the liquid storage pan 11, so that the air flowing therein is changed. warm. Therefore, during heating operation, even if cold outdoor air is supplied to the room, it is heated by the air supply duct 12 and blown into the room in advance, so the heating effect is not greatly hindered.

In addition, when the cooling and heating operation of the indoor unit 1 is not performed, but only the circulation operation, exhaust operation or air intake operation is performed independently through the auxiliary fan unit 15, the indoor air can be slowly circulated and the indoor polluted air can be discharged. air, or take in fresh outdoor air to renew the indoor air.

Next, the sub-air outlet 13 will be described with reference to FIG. 15 . Fig. 15 is a cross-sectional view illustrating the presence or absence of a straightening plate at the sub-air outlet of the indoor unit of Fig. 1 .

As shown in FIG. 15( a ), a wind direction rectifying plate 12 b is provided on the auxiliary air outlet 13 of the air supply duct 12 . The air blown out from the secondary air outlet 13 through the wind direction straightening plate 12b flows out along the wind direction straightening plate 12b, and is blown out in a direction approximately at right angles to the indoor unit 1 . In the absence of the wind direction rectifying plate 12b, the air flowing in the air supply duct 12 is blown obliquely as shown in Figure 15(b) due to the inertial force, and the cold wind cannot be effectively induced during the cooling operation as explained above. Flow, and effectively promote the flow of rising warm air during heating operation.

Next, the outdoor delivery pipe 22 will be described with reference to FIG. 16 .

The outdoor delivery pipe 22 is connected to the intake and exhaust port 18, and the outdoor delivery pipe 22 is arranged outdoors. An insect removal filter 30 is provided on the front end 22a of the outdoor delivery pipe 22 . This deworming filter 30 holes are larger than the pre-filter 33. This is to prevent clogging during intake operation. In addition, a cover body 32 is provided on the front end portion 22a so as to cover the periphery of the insect filter 30, and the shape of the front port of the cover body 32 is an irregular shape as shown in the figure. For example, by setting it in a wave shape, even if the cover body 32 is covered by wastes as large as newspapers, it is possible to ensure that the air is sucked in from the gaps of the wave-shaped depressions.

Next, a device for cleaning the inside of the sub-fan unit 15 and the outdoor duct 22 will be described with reference to FIG. 17 .

When dust is deposited inside the sub-fan unit 15 and the outdoor duct 22 , the intake filter 21 and the pre-filter 33 are pulled out, and the cleaning unit 34 is inserted instead of the intake filter 21 . At this time, since the insertion port of the intake filter 21 and the intake and exhaust ports 18 are arranged on a straight line toward the depth direction of the sub-fan unit 15, the nozzle 34b can reach the depth of the sub-fan unit 15, that is, the outdoor conveyance. near tube 22. In addition, by attaching a household cleaner (not shown) to the cleaner mounting portion 34a and operating it, waste deposited in the sub-fan unit 15 and the outdoor duct 22 can be sucked.

As mentioned above, according to the above-mentioned embodiment, there is provided a sub-fan that rotates in a certain direction separately from the main fan, a suction port and a housing corresponding to the sub-fan, an exhaust duct for discharging indoor air, and a device for sucking in outdoor air. Intake air duct, common exhaust and intake air intake and exhaust duct, common intake and circulation intake circulation air duct, through the adjustment damper set at the auxiliary fan suction part, the inhaled air is switched to indoor air or The outdoor air is switched to indoor or outdoor through the damper installed on the blowing part of the housing, thus, the auxiliary fan unit that can perform circulation operation, exhaust operation, and intake operation is assembled to make the auxiliary fan operate according to a certain Direction rotation and make the suction port and shell of the auxiliary fan into a shape suitable for the auxiliary fan, thus, the air supply efficiency of the auxiliary fan unit can be improved, and the operating noise of the auxiliary fan unit can be reduced. indoor unit.

In addition, during the intake operation, although the inhaled outdoor air passes through the intake filter, during the exhaust operation, the discharged indoor air does not pass through the intake filter, so the ventilation resistance during the exhaust operation can be reduced. , to increase the amount of exhausted room air.

Furthermore, in the air intake operation, the air is passed through the pre-filter to remove dust in the outdoor air, and in the exhaust operation, the indoor air to be discharged is also blown through the pre-filter, and the dust accumulated on the surface of the pre-filter is cleaned, by Therefore, while the cleaning function can be formed on the sub-fan unit, the intake filter and the pre-filter can be pulled out and installed from the front after opening the front panel of the indoor unit, thereby improving maintainability.

In addition, an air supply duct is provided at the front of the liquid storage tray of the indoor unit, and the airflow blown out by the sub-fan unit is guided to the sub-blowing outlet arranged on the upper part of the air outlet of the indoor unit, and the air flow is passed from the sub-blowing Blowing out from the outlet allows the cold air blown out during the cooling operation to reach far in the room, and at the same time can control the rise of the warm air blown out during the heating operation.

In addition, in this embodiment, as the operation of the sub-fan unit 15, three operation modes are provided, but the circulation operation mode may not be provided.

According to the present invention as described above, it is possible to provide an air conditioner including a sub-fan unit having an intake function and an exhaust function, and an air conditioner including a thin sub-fan unit even if an air cleaning filter is provided.

According to the present invention, it is possible to provide an air conditioner which includes a sub-fan unit having an intake function and an exhaust function, and reduces ventilation resistance during exhaust operation.

Claims (2)

1. air conditioner, have the air suction inlet and the air blow-off outlet that in rectangular indoor unit, form, be arranged between these air suction inlets and the air blow-off outlet and form the main fan of air channel, the heat exchanger that turns round this main fan and the room air that sucks from above-mentioned air suction inlet is carried out heat exchange, be arranged on the filter of upstream side of the air stream of this heat exchanger, be arranged in the above-mentioned indoor unit, and be connected the indoor peristome of indoor opening and at the outdoor peristome of outdoor opening, thereby form the housing of air channel in inside, be arranged on the air channel in this housing, and have by rotation and undertaken outdoor air is drawn into indoor air inlet running or room air is discharged into the secondary fan of outdoor exhaust running and the intake and exhaust unit of secondary fan motor, it is characterized in that:

At least be provided with the air inlet filter that outdoor air passes through when above-mentioned air inlet is turned round, make the rotating shaft almost parallel configuration of the rotating shaft of above-mentioned secondary fan and above-mentioned main fan, it is out of square with the air of the filter angle configurations by face that the air of above-mentioned secondary fan sucks face and above-mentioned air inlet.

2. air conditioner according to claim 1 is characterized in that:

When above-mentioned air inlet running, by this air inlet with filter with in the outdoor air suction chamber, and when above-mentioned exhaust running, with filter room air is not discharged into outdoor by above-mentioned air inlet.

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