Background technology
To send into indoor air conditioner through the air that overregulates and obtain already using for making indoor environment become comfortable.As an example of this air conditioner, describe with regard to the patent documentation 1 disclosed Floot type air conditioner that uses on the ground that is placed in.As shown in figure 15, this air conditioner 101 is provided with and is used for indoor air is taken into suction inlet 103 in the casing 102 at first near the front surface central authorities of casing 102.
In addition, the upper surface portion of casing 102 is provided with and is used for and will is taken into from suction inlet 103 and carries out the top blow-off outlet 104 that heat-exchanged air blows out upward through heat exchanger (not shown).On the other hand, below the suction inlet 103 of the front surface of casing 102, be provided with and be used for and carry out the below blow-off outlet 105 that heat-exchanged air blows out downwards.
As shown in figure 16, be sent to top blow-off outlet 104 or below blow-off outlet 105, be provided with the centrifugal fan (backward fan) 106 of on the complete cycle direction, blowing in the described casing 102 in order to carry out heat-exchanged air.In addition, guide top blow-off outlet 104 or below blow-off outlet 105 in order to carry out heat-exchanged air, the tilt position of set angle of the center lines with respect to centrifugal fan 106 in the casing 102 is provided with air director 107, be clipped in the middle at center and on this on air director 107 position (diagonal position) in opposite directions, be provided with down air director 108 centrifugal fan 106.
In this air conditioner 101, lean on the rotation of centrifugal fan 106 that room air is made it to pass through from heat exchanger (not shown) in suction inlet 103 is taken into casing 102.Carry out heat-exchanged air through over-heat-exchanger, becoming airflow flowing on the complete cycle direction under the effect of centrifugal fan 106 with circumferential speed component.This air-flow is guided into top blow-off outlet 104 and below blow-off outlet 105 respectively becoming the air-flow that becomes under up and down air-flow, the guiding at air director 108 down up and down under the guiding of last air director 107.Thus, send through heat-exchanged air to indoor from top blow-off outlet 104 and below blow-off outlet 105.
[patent documentation 1] TOHKEMY 2001-208366 communique
But existing air conditioner exists following problem.In general, as heating equipment, comprise air conditioner, various types of heating equipments such as warm air heater and infrared heater are popularized.And on the other hand, as refrigeration plant, except air conditioner, other the suitable refrigeration plants with cooling and dehumidification function are not seen as yet.
Therefore, for having the refrigeration and the air conditioner of heat-production functions, compare with using, want height as the frequency that refrigeration plant uses as heating equipment.Usually, when Floot type air conditioner carries out cooling operation, send to indoor up from the top blow-off outlet through the cooled air of heat exchange.With respect to this, when heating running, carry out heat-exchanged air and mainly send to indoor from the below blow-off outlet or from below blow-off outlet and two blow-off outlets of top blow-off outlet.
As shown in figure 16, in above-mentioned Floot type air conditioner 101, the air that flows to top blow-off outlet 104 flows (up-draught) air-supply passage 113 in, described air-supply passage 113 be formed on under air director 108 tongue 110 upward a distolateral extension of blow-off outlet 104 the 111a of wall portion, and from the tongue 109 of last air director 107 upward between the 111b of wall portion of another distolateral extension of blow-off outlet 104.On the other hand, the air that flows to below blow-off outlet 105 flows (canyon) air-supply passage 114 in, described air-supply passage 114 be formed on from the 112b of wall portion of tongue 109 a distolateral extension of blow-off outlet 105 downwards of last air director 107, with certainly under between the 112a of wall portion of tongue 110 another distolateral extension of blow-off outlet 105 downwards of air director 108.
Described two tongues 109,110 are this center 106a to be clipped in the middle to be provided with in opposite directions on the vertical line with respect to the center 106a by centrifugal fan 106 tilts the position of set angle (θ 1, θ 2).Therefore, because the height of casing 102 is restricted, the length (distance) of each 111a of wall portion, 111b, 112a, 112b also is restricted.Its result, only particularly when carrying out the high cooling operation of usage frequency, want from above blow-off outlet 104 to the indoor occasion (up-draught) of sending air, exist enough problems that blows out air quantity that can not get.
Summary of the invention
The present invention proposes for addressing the above problem, and its objective is can guarantee the air quantity that upwards blows out when a kind of cooling operation is provided and can be to the air conditioner of canyon when heating running.
Air conditioner involved in the present invention comprises that set casing, top blow-off outlet, below blow-off outlet, centrifugal fan, fan guard, top blow out pipeline, cut the hole and the below blows out pipeline.The top blow-off outlet is arranged on the top of casing, is used for blowing out outside casing being taken in the casing and carrying out heat-exchanged air.The below blow-off outlet is arranged on the bottom of casing, is used for blowing out outside casing carrying out heat-exchanged air.Above centrifugal fan is arranged in casing blow-off outlet and below between the blow-off outlet, be used for sending towards top blow-off outlet and below blow-off outlet with carrying out heat-exchanged air.Fan guard has from circumferentially centrifugal fan being surrounded and being formed with for carrying out the surrounding wall portion of heat-exchanged air along the inner peripheral surface that flows, and is provided with in the mode that centrifugal fan is covered.The top blows out the top that pipeline is arranged on fan guard, and the two is communicated with the inside and top blow-off outlet of fan guard.Cut the hole and be formed on the set surrounding wall portion part among the surrounding wall portion of fan guard, partly locate blow-off outlet below tangential direction the place ahead of the air stream that forms along inner peripheral surface exists in this set surrounding wall portion.The below blows out the below that pipeline is arranged on fan guard, and the two is communicated with the inside and below blow-off outlet of fan guard via cutting the hole.
According to such scheme, at first, fan guard has from circumferentially centrifugal fan being surrounded and being formed with for carrying out the surrounding wall portion of heat-exchanged air along the inner peripheral surface that flows.Thus, when carrying out the high cooling operation of usage frequency, make through heat exchange and cooled air flows along the inner peripheral surface of its surrounding wall portion, thereby the circulation path that can guarantee air there is enough length, makes the air quantity of the air of sending from the top blow-off outlet enough big.In addition, cut tangential direction the place ahead that the hole is formed at air-flow and exist on the set surrounding wall portion part of below blow-off outlet, and be provided with and this is cut the hole blow out pipeline with the below that the below blow-off outlet is communicated with.Thus, heating when running, can reduce from cut the hole pressure loss of the air of sending from the below blow-off outlet by the back, simultaneously, can guarantee not from cut the hole by but flow and then the air quantity of the air sent from the top blow-off outlet along inner peripheral surface.
More particularly, in order to reduce the pressure loss of the air of sending from the below blow-off outlet, preferably, cutting hole shape becomes and has and the long-pending identical sectional area of the opening section of below blow-off outlet, and the below blows out pipeline and forms and have and the long-pending identical circulation path sectional area of opening section.In addition, the below blows out pipeline preferably towards the below blow-off outlet and along the air-flow setting of the air by cutting the hole.So-called identical sectional area is not meant the sectional area that equates fully on mathematics, also do not comprise and can bring the number range of influence to the pressure loss of air.
More particularly, circulation path length in order to ensure the air of sending from the top blow-off outlet, preferably, the top of fan guard be formed be used for above blow out the connecting portion that pipeline is communicated with, this connecting portion, with the perpendicular direction of the rotating shaft of centrifugal fan on a side, be provided with tongue, in fan guard, formation is flowed towards air connecting portion and side opposite side in opposite directions from the part of tongue through cutting the place, hole, and the inner peripheral surface of surrounding wall portion is formed on from the zone of the part arrival opposite side of tongue through cutting the place, hole according to the form of involute curve.
Have again, preferably, cut the hole and be formed on distance apart from the side at tongue place than on the shorter position of the distance of the opposite side of distance connecting portion.
For when carrying out cooling operation from above blow-off outlet obtain enough air amounts of blowing out, heating when running from below blow-off outlet air is sent, preferably have and be used for the below of flowing through is blown out the air door that the air capacity of pipeline is regulated.
Description of drawings
Fig. 1 is the front view of the air conditioner of embodiment of the present invention.
Fig. 2 is the side view of the air conditioner in the embodiment of the present invention.
Fig. 3 is the cutaway view at hatching III-III place shown in Figure 1 in the embodiment of the present invention.
Fig. 4 is the cutaway view at hatching IV-IV place shown in Figure 2 in the embodiment of the present invention.
Fig. 5 is the stereogram of the fan guard in the embodiment of the present invention.
Fig. 6 is another stereogram of the fan guard in the embodiment of the present invention.
Fig. 7 is the 1st front view that the position describes that is provided with of cutting the hole that is used on the fan guard of embodiment of the present invention.
Fig. 8 is the 2nd front view that the position describes that is provided with of cutting the hole that is used on the fan guard of embodiment of the present invention.
Fig. 9 is used for partial sectional view that cooling operation operation principle to the embodiment of the present invention air conditioner describes, that air door is showed.
Figure 10 is used for the 1st cutaway view that the cooling operation operation principle to the embodiment of the present invention air conditioner describes.
Figure 11 is used for the 2nd cutaway view that the cooling operation operation principle to the embodiment of the present invention air conditioner describes.
Figure 12 is the cutaway view that the running operation principle describes that heats that is used for the embodiment of the present invention air conditioner.
Figure 13 is used for the embodiment of the present invention air conditioner heated running operation principle partial sectional view that describe, that air door is showed.
Figure 14 is the stereogram that the modified example that is installed in the air door on the fan guard in the embodiment of the present invention is showed.
Figure 15 is the stereogram of existing air conditioner.
Figure 16 is the cutaway view at hatching XVI-XVI place shown in Figure 15.
The specific embodiment
Below, describe with regard to the Floot type air conditioner of embodiment of the present invention.As depicted in figs. 1 and 2, at first,, be provided with and be used for room air is taken into suction inlet 3 in the casing 2 at the back side of the casing 2 of air conditioner 1.On the top of the front surface of casing 2, be provided with and be used for and be taken into from suction inlet 3 and carry out the top blow-off outlet 4 that heat-exchanged air upwards blows out through over-heat-exchanger (not shown).On the other hand, in the bottom of the front surface of casing 2, be provided with and be used for and carry out the below blow-off outlet 6 that heat-exchanged air blows out downwards.In addition, also be provided with on casing 2 side and another side and be used for and carry out sidepiece blow-off outlet 5a, the 5b that heat-exchanged air blows out to the left and right.
Then, the inside to casing 2 describes.As shown in Figure 3, be provided with in the casing 2 and be used for room air being taken into the centrifugal fan 9 that blows out from top blow-off outlet 4 grades again in the casing 2 from suction inlet 3.Centrifugal fan 9 has motor 9a and a plurality of blade 9b, is arranged near the central authorities with suction inlet 3 front surface side in opposite directions, casing 2.Between suction inlet 3 and centrifugal fan 9, be provided be used for will be contained in the air the air cleaner 7 removed of dust and, the heat exchanger 8 that is used for carrying out heat exchange.Off-premises station (not shown) is connected on this heat exchanger 8 to realize the circulation of cold-producing medium.
As shown in Figure 3 and Figure 4, the fan guard 10 that centrifugal fan 9 is covered from the front surface side of casing 2 is installed.Above this fan guard 10, be provided with the inside that makes fan guard 10 and blow out pipeline 16 with the top that top blow-off outlet 4 or sidepiece blow-off outlet 5a, 5b are communicated with.The top blows out pipeline 16 and is formed by anterior 16a of pipeline and pipeline rear portion 16b.
On the other hand, below fan guard 10, be provided with the below that the inside that makes fan guard 10 is communicated with below blow-off outlet 6 and blow out pipeline 15.As described later, on this fan guard 10, according to the two position relation of fan guard 10 and below blow-off outlet 6, and both certain portions be provided with below blow out that pipeline 15 is communicated with cut hole 12.In addition, below blow out pipeline 15 midway, be provided with and be used for the below of flowing through is blown out the air door 17 that the air capacity of pipeline 15 is regulated.
Then, the structure to fan guard 10 describes.As shown in Figure 5 and Figure 6, fan guard 10 has the surrounding wall portion 11 that the blade 9b (with reference to Fig. 4) of centrifugal fan 9 is fenced up from circumferential.Be formed with for carrying out heat-exchanged air in the inboard of surrounding wall portion 11 along the inner peripheral surface 11a that flows.On both allocations of surrounding wall portion 11, be formed with the below blows out that pipeline 15 (with reference to Fig. 4) is communicated with and cut hole 12.
In addition, on the top of fan guard 10, be formed with and blow out pipeline 16 with the top and be connected and blow out the connecting portion that is the opening form 14 that pipeline 16 is communicated with the top.Be positioned at this connecting portion 14 with the perpendicular direction of the rotating shaft 9c of centrifugal fan 9 on the part of fan guard 10 of a side 14a on, be formed with blade 9b and be separated by set interval towards the outstanding tongue 13 of blade 9b (with reference to Fig. 4).
Connecting portion 14 with side 14a opposite side 14b in opposite directions, surrounding wall portion 11 blows out pipeline 16 (with reference to Fig. 4) with the top, and the two links to each other sleekly.As inner peripheral surface 11a, from tongue 13 through be formed with cut hole 12 part till the opposite side 14b of connecting portion 14, form according to involute curve.In the rectangular aperture on the middle body that is arranged on fan guard 10, the motor 9a (with reference to Fig. 4) of centrifugal fan 9 is installed.In fan guard 10, form from tongue 13 through cutting the main air flow that flows towards opposite side 14b in hole 12.
Then, the position of cutting hole 12 that just is formed on the surrounding wall portion 11 describes.As mentioned above, in fan guard 10, air flows to opposite side 14b through cutting hole 12 from tongue 13 along inner peripheral surface 11a.As shown in Figure 7, cut hole 12 be formed in the surrounding wall portion 11, have on the part of below blow-off outlet 6 in the place ahead of the tangential direction (arrow 50a) of air stream (arrow 50).At this moment, cut hole 12 and be formed on distance apart from the side 14a at tongue 13 places than on the shorter position of the distance of the opposite side 14b of distance connecting portion 14.In addition, the below blows out pipeline 15 and cuts that hole 12 is communicated with and basically along be connected to below blow-off outlet 6 from the air-flow (arrow 52) of cutting the air that passes through in hole 12.Therefore, the below blows out pipeline 15 and with respect to vertical direction (with reference to Fig. 4) is set obliquely.
Said " in the surrounding wall portion 11, below the place ahead of the tangential direction of air stream has the part of blow-off outlet 6 ", if cut the hole along circumferentially in a certain scope, being provided with, then be meant in the surrounding wall portion 11, cut from this hole by after be in line the place ahead of flow air stream exist below the part of blow-off outlet 6.And not being meant all positions that make progress in week of cutting the inner peripheral surface 11a zone in hole with respect to formation, below blow-off outlet 6 all is present in the place ahead of its tangential direction.
In addition, so-called blow out pipeline 15 along the below of the air-flow setting of the air by cutting hole 12 basically, be not meant that the below blows out pipeline 15 fully along the air-flow setting of the air by cutting hole 12, do not extend towards below blow-off outlet 6 as long as by the circulation path of cutting hole 12 flow air very big change ground does not take place, tilting a little with respect to airflow direction, some are also passable.
For above-mentioned configuration relation is limited particularly, as shown in Figure 7, the rotating shaft 9c that has for example set with centrifugal fan 9 is the orthogonal X-Y reference axis of initial point O.So, cutting hole 12 will form on the part of the surrounding wall portion 11 of the 4th quadrant.On the other hand, if as shown in Figure 8, cut hole 12 and form on the part of the surrounding wall portion 11 of the 3rd quadrant, then below blow-off outlet 6 is not air-flow (arrow 51) the place ahead that is positioned at by the air of cutting hole 12 streamlined flow, can't be directed to below blow-off outlet 6 with carrying out heat-exchanged air.The inventor confirms, actually is formed at occasion on the part of surrounding wall portion 11 of the 3rd quadrant cutting hole 12, and air is blown out from below blow-off outlet 6.
In addition,, cut hole 12 and form, have the opening section long-pending (length length * circumferencial direction depth direction on) long-pending identical with the opening section of below blow-off outlet 6 for fear of the pressure loss.In addition, this being cut below that hole 12 and below blow-off outlet 6 be communicated with, to blow out pipeline 15 also be to be provided with according to the circulation path sectional area long-pending identical with the opening section of below blow-off outlet 6.So-called identical sectional area, be not on mathematics strict equating, also comprise error in the manufacturing etc. certainly, and comprise the number range that can not impact the pressure loss of air.
In addition, according to the difference of cutting the position of hole 12 in the 4th quadrant on the part of the surrounding wall portion 11 that is formed at the 4th quadrant, can there be deflection in the horizontal air amount of blowing out (wind speed) in blow-off outlet 6 places, below sometimes.As shown in Figure 4, blow out pipeline 15 for this below, below blow out pipeline 15 be provided with air director 18 midway, with seek blow-off outlet 6 places, below laterally (about) homogenising of the air amount of blowing out.
Then, the operation principle with regard to above-mentioned air conditioner 1 describes.At first, when carrying out cooling operation, as shown in Figure 9, the below blows out pipeline 15 interior set air doors 17 and is closed.Then, as shown in figure 10,, indoor air (arrow 60) is taken in the casing 2, the dust that is contained in the air is removed by air cleaner 7 from suction inlet 3 along with the rotation of centrifugal fan 9.From the air cleaner 7 by and the air that dust has been removed is passed through from heat exchanger 8.During from heat exchanger 8, passing through, be circulated in and carry out heat exchange between cold-producing medium in the heat exchanger 8 and the air and make the air cooling.
As shown in figure 11, carry out heat-exchanged air because the effect of centrifugal fan 9 and flowing along the inner peripheral surface 11a of the surrounding wall portion 11 of fan guard 10, in fan guard 10, can not blow out pipeline 15 downwards and flow, but form from the air stream (arrow 61) of the part of tongue 13 through cutting 12 places, hole towards the opposite side 14b of connecting portion 14.That is, according to reference axis shown in Figure 7, air will flow to the 2nd quadrant through the 4th quadrant and the 3rd quadrant from the 1st quadrant.
Arrive the air of connecting portion 14, blow out pipeline 16 through the top from connecting portion 14 and be drawn towards top blow-off outlet 4 or sidepiece blow-off outlet 5a, 5b.So, freeze to indoor to indoor blowing out from top blow-off outlet 4 or sidepiece blow-off outlet 5a, 5b through the cooled air of heat exchange.
Then, when heating running, as Figure 12 and shown in Figure 13, at first, the below blows out pipeline 15 interior set air doors 17 and is opened.Along with the rotation of centrifugal fan 9, from suction inlet 3 indoor air is taken in the casing 2, by air cleaner 7 dust that is contained in the air is removed.From the air cleaner 7 by and the air that dust has been removed is passed through from heat exchanger 8.During from heat exchanger 8, passing through, between the cold-producing medium of heat exchanger 8 circulation and air, carry out heat exchange and make air warm (with reference to Figure 10).
Carry out heat-exchanged air because the rotation of centrifugal fan 9 and flowing along the inner peripheral surface 11a of the surrounding wall portion 11 of fan guard 10 forms from the part of tongue 13 through cutting 12 places, hole towards the mobile main air flow (arrow 62) of the opposite side 14b of connecting portion 14 fan guard 10 in.At this moment, because air door 17 opens, thereby the part air (arrow 63) among the inner peripheral surface 11a flow air will blow out pipeline 15 downwards and flow through cutting hole 12 from tongue 13.Below blow out in the pipeline 15 flow air from below blow-off outlet 6 send to indoor.
On the other hand, the surplus air that flows in fan guard 10 blows out pipeline 16 from connecting portion 14 and is drawn towards top blow-off outlet 4 or sidepiece blow-off outlet 5a, 5b through the top.So the air that has warmed through heat exchange heats indoor to indoor sending from top blow-off outlet 4, sidepiece blow-off outlet 5a, 5b and below blow-off outlet 6.In addition, when heating running, also can only send air from below blow-off outlet 6.At this moment, utilize set air door (not shown) to stop flowing of blow-off outlet 4 upward.
In above-mentioned air conditioner 1, as the fan guard 10 that centrifugal fan 9 is covered, blow out above being communicated on the part of a side 14a of connecting portion 14 of pipeline 16 and be formed with tongue 13, and at the opposite side 14b of connecting portion 14, surrounding wall portion 11 and top blow out pipeline 16 the two link to each other sleekly.Thus, can make to produce the main air flow that flows towards the opposite side 14b of connecting portion 14 along surrounding wall portion 11 from the tongue 13 of a side 14a of connecting portion 14 in the fan guard 10, the length of guaranteeing the circulation of air path from tongue 13 to top blow-off outlet 4 is than existing air-conditioning captain.Its result when carrying out the high cooling operation of usage frequency, can make through the chilled air of heat exchange to reach enough air quantity that blows out.
In addition, as fan guard 10, below tangential direction the place ahead of air stream among the surrounding wall portion 11, that forming along inner peripheral surface 11a exists on surrounding wall portion 11 parts of blow-off outlet 6, be formed with and cut hole 12, the below blows out pipeline 15 and cuts with this that hole 12 is communicated with and be connected on the blow-off outlet 6 of below along air stream basically.And, the opening section of cutting hole 12 is long-pending, that the below blows out pipeline 15 circulation path sectional area and the opening section of below blow-off outlet 6 is long-pending designs roughly the samely.
Thus, reduced in fan guard 10, flowing to the part that below blow-off outlet 6 air streams cause obstruction through cutting hole 12, can when heating running, make the pressure loss be reduced to minimum and from below blow-off outlet 6 blow out through heat-exchanged air.Like this, this air conditioner can guarantee that the air quantity that upwards blows out is enough big when carrying out the high cooling operation of usage frequency, and can carry out the canyon that the up-draught limit has suppressed the pressure loss in the limit when heating running.
About above-mentioned air conditioner 1, enumerated below blow out the example that air door 17 is set of pipeline 15 midway, but for example also can be as shown in figure 14, adopt along the slide air door 19 of form of (arrow 55) of the surrounding wall portion 11 of fan guard 10.
The example that the disclosed embodiment of this specification is just enumerated, the present invention is not limited.The present invention is not by scope discussed above but delimited by claims, comprised and the equal scheme of claims and all changes that can carry out in the claim scope.