US20110174011A1 - Ventilating device and outdoor unit having the same - Google Patents
Ventilating device and outdoor unit having the same Download PDFInfo
- Publication number
- US20110174011A1 US20110174011A1 US13/010,494 US201113010494A US2011174011A1 US 20110174011 A1 US20110174011 A1 US 20110174011A1 US 201113010494 A US201113010494 A US 201113010494A US 2011174011 A1 US2011174011 A1 US 2011174011A1
- Authority
- US
- United States
- Prior art keywords
- fan
- blade
- motor
- outdoor unit
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/007—Axial-flow pumps multistage fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/024—Multi-stage pumps with contrarotating parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/40—Vibration or noise prevention at outdoor units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/46—Component arrangements in separate outdoor units
- F24F1/48—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow
- F24F1/54—Inlet and outlet arranged on opposite sides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
Abstract
A ventilating device and an outdoor unit including the same are disclosed. More particularly, the present invention relates to a ventilating device including a counter-rotating fan having improved wind ventilation efficiency as well as minimized noise generated during the fan operation.
Description
- Pursuant to 35 U.S.C. §119(a), this application claims the benefit of earlier filing date and right of priority to Korean Application No. 10-2010-0005537, filed on Jan. 21, 2010, the contents of which are hereby incorporated by reference herein in their entirety.
- 1. Field of the Disclosure
- The present invention relates to a ventilating device and an outdoor unit having the same.
- 2. Discussion of the Related Art
- In general, air conditioners are electric appliances configured to cool or heat an indoor space. Such an air conditioner includes an indoor unit installed in a room and an outdoor unit installed outside, with connected with the indoor unit via a refrigerant pipe or electric wire. Here, the indoor unit and the outdoor unit may be integrally formed according to the kind of the air conditioner including the same.
- There may be a multi-type air conditioner including a plurality of indoor units connected to a single outdoor unit or a system air conditioner including a plurality of indoor units connected to a plurality of outdoor units, to operate the indoor and outdoor units selectively.
- Such an outdoor unit includes a case configured to define an exterior appearance and a fan provided in the case to generate air flow, an outdoor unit heat-exchanger provided in the case to heat exchange air drawn into the case with refrigerant provided therein, and a compressor configured to compress the refrigerant heat-exchanged in the outdoor heat exchanger as well as an indoor exchanger.
- An inlet configured to draw external air therein and an outlet configured to exhaust the drawn air after heat-exchanged by the outdoor heat exchanger may be formed in the case. A grill may be provided in the outlet to protect the fan and to prevent external foreign substance from being drawn toward the fan.
- The outdoor unit may perform heat radiation and heat absorption according to cooling or heating for the room and it may operate the fan to improve heat exchange efficiency during the heat radiation or absorption. Because of that, the outdoor unit has to be supplied a sufficient air flow rate.
- In addition, even though the outdoor unit is installed outdoor typically, severe noise has to be prevented.
- The noise generated in the outdoor unit may be in proportion to the rotation speed of the fan and the rotation speed of the fan may be in proportion to the wind amount of the fan. As the air flow rate is increasing, the noise may be increasing together with that. Because of that, it is required to secure an appropriate air flow rate of a ventilating device provided in the outdoor unit and to reduce the noise.
- An object of the present invention is to provide a ventilating device including a counter-rotating fan capable of minimizing the noise generated during the operation of the fan, with improved ventilation efficiency, and an outdoor unit including the ventilating device.
- Accordingly, the present invention is directed to a ventilating device and an outdoor unit including the same.
- Additional advantages, objects, and features of the disclosure will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
- To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, an outdoor unit includes a housing comprising an inlet and an outlet; an outdoor heat exchanger mounted in the housing; a first fan comprising a plurality of first blades arranged in a radial direction; a second fan comprising a plurality of second blades arranged in the radial direction; and at least one motor configured to rotate the first fan and the second fan in a different direction, wherein shafts of the first fan and the second fan are arranged on same straight line and the shaft direction height of each first blade of the first fan is different from the shaft direction height of each second blade of the second fan.
- The first fan may be arranged between the outdoor heat exchanger and the second fan and the shaft direction height of each second blade of the second fan may be larger than the shaft direction height of each first blade of the first fan.
- The shaft direction height of each second blade of the second fan may be one times or more and less than four times as much as the shaft direction height of each first blade of the first fan.
- Each first blade of the first fan and each second blade of the second fan may have a pitch angle of 20 degree or more and less than 30 degree.
- Each first blade of the first fan and each second blade of the second fan may have a sweep angle of 20 degree or more and less than 60 degree.
- The number of the first blades of the first fan and the number of the second blades of the second fan may be 2 to 5, respectively.
- The outdoor unit may further include a first motor configured to drive the first fan; and a second motor configured to drive the second fan, wherein shafts of the first and second motors are arranged on same straight line.
- The first motor and the second motor are arranged in a different direction, to have the shafts arranged on same straight line.
- The rotation speed of the first motor may be different from the rotation speed of the second motor.
- The rotation speed of the second motor may be higher than the rotation speed of the first motor.
- The rotation speed of the second motor may be two times or more and less than three times as much as the rotation speed of the first motor.
- Each first blade of the first fan and each second blade of the second fan may have a different directional slope.
- In another aspect of the present invention, a ventilating device includes a first fan comprising a plurality of first blades arranged in a radial direction; a first motor configured to drive the first fan; a second fan comprising a plurality of second blades arranged in the radial direction; and a second motor configured to drive the second fan, wherein each first blade of the first fan and each second blade of the second fan have a different directional slope and a shaft direction height of each second blade of the second fan is larger than a shaft direction height of each first blade of the first fan.
- The height of each second blade of the second fan may be one times or more and less than four times as much as the height of each first blade of the first fan.
- Each first blade of the first fan and each second blade of the second fan may have a pitch angle of 20 degree or more and less than 30 degree.
- Each first blade of the first fan and each second blade of the second fan may have a sweep angle of 20 degree or more and less than 60 degree.
- The number of the first blades of the first fan and the number of the second blades of the second fan may be 2 to 5, respectively.
- The first motor and the second motor may be arranged in an opposite direction to each other, with a single motor mount located there between, and the rotation speed of the second motor may be higher than the rotation speed of the first motor.
- The rotation speed of the second motor may be two times or more and less than three times as much as the rotation speed of the first motor.
- The first motor and the second motor may rotate the first fan and the second fan in an opposite direction, respectively.
- The first motor and the second motor may be mounted to a single motor mount in a different direction, to have shafts of the motors arranged on same straight line.
- It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
- The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the principle of the disclosure.
-
FIG. 1 is a perspective view illustrating an outdoor unit according to the present invention; -
FIG. 2 is a sectional view illustrating the outdoor unit according to the present invention; -
FIG. 3 is a side-sectional view and a plane view illustrating a first fan according to the present invention; -
FIG. 4 is a side-sectional view and a plane view illustrating a second fan according to the present invention; -
FIG. 5 is a diagram illustrating the result of experiments on noise and the wind ventilation amount of a fan mounted to an indoor unit or ventilating device according to the present invention; and -
FIG. 6 is a diagram illustrating relation of noise according to sweep angle change of each fan. - Reference will now be made in detail to the specific embodiments of the present invention, examples of which are illustrated in the accompanying drawings. It is to be understood by those of ordinary skill in this technological field that other embodiments may be utilized, and structural, electrical as well as procedural changes may be made without departing from the scope of the present invention. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
-
FIG. 1 is a perspective view illustrating an outdoor unit according to the present invention. The outdoor unit according to the present invention includes ahousing 110 having an inlet 112 (not shown) and anoutlet 111 formed therein, with a grill provided in the grill, and a ventilating device having a fan (not shown) provided between theinlet 112 and theoutlet 111 to blow winds. Theinlet 112 may be formed in a rear surface of thehousing 110, in opposite to theoutlet 111. - A ventilating ability as variable of heat exchange capacity of an indoor unit may be depending on a capacity of the ventilating device provided in the outdoor unit. The ventilating ability of the fan provided in the outdoor unit may be in proportion to the size of the fan. Here, it has to be put into consideration that the size of the outdoor unit is limited. Also, nose generated in the fan installed in a limited space has to be reduced as much as possible.
- As a result, the outdoor unit according to the present invention includes the
housing 110 having theinlet 112 and theoutlet 111 formed therein, anoutdoor heat exchanger 120 mounted in the housing, afirst fan 210 having a plurality of blades arranged along a radial direction, asecond fan 230 having a plurality of second blades arranged along a radial direction, and at least one motor configured to rotate thefirst fan 210 and thesecond fan 230 in a different direction. Shafts of the first fan and thesecond fan 230 may be arranged in a rectilinear direction. Afirst blade 212 of thefirst fan 210 and asecond blade 232 of thesecond fan 230 are slope in a different direction. The shaft-direction height of thefirst blade 212 provided in thefirst fan 210 is different from that of thesecond blade 232 provided in thesecond fan 230. - The outdoor unit according to the present invention may include the
first fan 210 and thesecond fan 230 rotating in a different direction with respect to thefirst fan 210. As follows, the ventilating device including a counter-rotating fan according to the present invention and the outdoor unit including the ventilating device will be described in detail. -
FIG. 2 is a sectional view of theoutdoor unit 100 according to the present invention. Thehousing 110 of the outdoor unit according to the present invention may include theinlet 112 formed in at least one surface thereof. According to an embodiment shown inFIG. 2 , theinlet 112 may be provided in rear and side surfaces of thehousing 110. - An
outdoor heat exchanger 120 may be further provided to heat-exchange with air drawn via theinlet 112 and theoutdoor heat exchanger 120 may be extendedly bent to face the inlets provided in rear and side surfaces of the housing and to use the air drawn via theinlet 112 in heat-exchanging. Acompressor 150 may be provided in thehousing 110 to compress refrigerant used as heat-exchange medium, with circulating an indoor heat exchanger of an indoor unit and theoutdoor heat exchanger 120. - The
compressor 150 may be provided in a predetermined portion of thehousing 110, connected with a high/low pressurerefrigerant pipe 160 connecting the outdoor unit and the indoor unit with each other. - The outdoor unit according to the present invention may include a
ventilating device 200 having counter-rotating fans configured to rotate in a different direction, to decrease noise generated in the outdoor unit and to compensate loss of air ventilation generated by the noise decrease. - Specifically, the ventilating device may include a
first fan 210 having a plurality offirst blades 212 arranged in a radial direction, afirst motor 220 configured to drive the first fan, asecond fan 230 having a plurality ofsecond blades 232 arranged in a radial direction, asecond motor 240 configured to drive thesecond fan 230. The first blades 212 o thefirst fan 210 and thesecond blades 232 of thesecond fan 230 may be inclined in a different direction. The shaft direction height of thesecond blades 232 provided in thesecond fan 230 may be larger than that of thefirst blades 212 provided in thefirst fan 210. - According to the embodiment shown in
FIG. 2 , the motors configured to drive the fans, respectively, may be provided separately. Each of the motors may be mounted in asingle motor mount 250 oppositely. - In other words, as shown in
FIG. 2 , shafts of the motors may be on same straight line arranged in an opposite direction, with themotor mount 250 located there between. - Each shaft (not shown) configured to transmit a rotational force of each
motor fan motor - Specifically, the
first fan 210 and thesecond fan 230 have shafts arranged on the same line, respectively, and they are rotated in an opposite direction. The rotation speeds of the motor may be different from each other, which will be described later. - As follows, the ventilating device according to the present invention and a fan of an outdoor unit having the ventilating device will be described in reference to
FIG. 3 . -
FIG. 3 is a side sectional view and a plane view illustrating thefirst fan 210. - Typically, a fan mounted in the conventional outdoor unit includes a plurality of blades. As shown in
FIG. 3 , thefirst fan 210 includes three first-blades 212. Thesecond fan 230 generates pressure difference used to make external air drawn via theinlet 112 formed in thehousing 110 and then heat-exchanged in theoutdoor heat exchanger 120, to be discharged via theoutlet 111 formed in the housing. Because of that, thesecond fan 230 provided below thefirst fan 210 with respect to a sectional view of the outdoor unit shown inFIG. 2 may be rotated along a predetermined direction shown inFIG. 3( a), to exhaust air via theoutlet 111 formed in thehousing 110. - The
first fan 210 includes a plurality of blades provided in afirst body 214 coupled to a first shaft (not shown) rotated by thefirst motor 220. Each of theblades 212 may be connected to thefirst body 214 at a predetermined angle (pitch angle). - The pitch angle (θp) means an angle formed by a line connecting both right and left ends of the blade and a plane perpendicular to the shaft of the fan, in close relation to the wind ventilation amount and noise.
- In addition, as shown in the plane view of the
first fan 210 shown inFIG. 2( b), an angle of each blade with respect to a downward direction (sweep angle) may be in relation with to the wind ventilation amount and noise of the fan. The sweep angle (θs) may be defined as angle formed by a line connecting a connected point between the blade and the body with the shaft and a line connecting a connected point (P) between the blade and the body and an outer end of the blade. - The pitch angle of the first fan shown in
FIG. 3 , that is, a first pitch angle (θp1) may have a predetermined range of 20 to 25 degree and a first sweep angle (θs1) that is, the sweep angle (θs) may have a predetermined range of 20 to 60 degree. - The shaft direction height of each blade composing the fan may mean the maximum height of a single blade with respect to the side sectional view of the fan.
- According to the embodiment shown in
FIGS. 3 and 4 , the shaft direction height (h1 and h2) may be determined by a diameter and the pitch angle of the blade of the fan. In case of the same pitch angle, the shaft direction height may be increasing as the diameter of the fan is increasing. - The ventilating device or outdoor unit according to the present invention has assumption of limited space. Because of that, the diameter of the fan may be fixed.
- As a result, the shaft direction height (h1 and h2) may be in proportion to the pitch angle if the size of each body of the blade or the size of each blade is identical.
- The number of the
first blades 212 of thefirst fan 210 and thesecond blades 232 of thesecond fan 230 may be 2 less than 5. -
FIG. 4 is a side sectional view and a plane view illustrating thesecond fan 230. Repeated description betweenFIG. 3 andFIG. 4 will be omitted. Thesecond fan 230 may be provided in rear of thefirst fan 210. Because of that, air drawn via theinlet 112 of the housing may be ventilated by thefirst fan 210 and thesecond fan 230 sequentially, to be discharged via theoutlet 111. - The
first fan 210 and thesecond fan 230 may be rotated in an opposite direction and they ventilate air in an identical direction. Because of that, each of the blades may be coupled to the body of the fan to have a different slope. That is, the pitch angle of each blade composing each fan has a different direction. - Here, the pitch angle of the second fan shown in
FIG. 4 , that is, a second pitch angle (θp2) may have a range of 25 to 30 degree. The swift angle (θs), that is, a second sweep angle (θs2) also has a range of 20 to 60 degree. - Like the
first fan 210, thesecond fan 230 generates pressure difference used to make external air drawn via theinlet 112 formed in thehousing 110 and heat-exchanged in theoutdoor heat exchanger 120, to be exhausted via theoutlet 111 formed in thehousing 110 after that. - Also, the
second fan 230 may be configured to rotate in an opposite direction with respect to thefirst fan 210. - When the two fans are configured to rotate in an opposite direction, it is known that straightness of winds is improved and noise is reduced, with improved wind ventilation.
- The ventilating device or the outdoor unit including the ventilating device is invented to achieve contrary objects of improved ventilation efficiency and noise reduction in a limited room, in a balanced way. As a result, the appearance (shaft direction height (h2/h1), pitch angle and/or sweep angle) of each fan may be determined based on a result of experiments shown in
FIGS. 5 and 6 . -
FIG. 5 is the result of the experiments for noise and air ventilation amount of the fan mounted in the indoor unit or the ventilating device of the present invention. More specifically,FIG. 5( a) illustrates the size of noise generated according to the ratio of the shaft direction height of thefirst fan 210 to the shaft direction height of the second fan (h2/h1).FIG. 5( b) illustrates the size of the hourly air ventilation amount according to the ratio of the shaft direction height of thefirst fan 210 to the shaft direction height of the second fan (h2/h1). - A horizontal axis of a graph shown in
FIG. 5( a) is a dimensionless variable meaning the second shaft direction height (h2)/the first shaft direction shaft (h1) as the ration of the shaft direction heights (h2/1). That is, the horizontal axis of the graph shown inFIG. 5( a) shows that the second shaft direction height (h2) of thesecond fan 230 is getting larger than the shaft direction height (h1) of thefirst fan 210 as coming along a rightward direction. In other words, as coming rightward, the shaft direction height (h2) of thesecond fan 230, which is a rear fan, is getting larger than the shaft direction height (h1) of thefirst fan 210, which is a front fan. It means that thefirst fan 210 which is the front fan is slimmer than thesecond fan 230 which is the rear fan. - According to the result of experiments shown in
FIG. 5( a), when the ratio of the shaft direction height (h1) to the other (h2) is less than a predetermined value, it is shown that noise is increasing drastically. If the ratio of the second shaft height (h2) to the first shaft direction height (h1) is less than a predetermined value near ‘1’, that is, if the shaft direction heights (h1 and h2) of thefirst fan 210 is identical to or larger than those of thesecond fan 230, it is shown that noise is increasing drastically. In other words, if the ratio of the second shaft direction height (h2) to the first shaft direction height (h1) is approximately less than 1, the generated noise may be approximately 55 dB or more. If the ratio of the second shaft direction height (h2) to the first shaft direction height (h1) is approximately 1 or more, the generated noise may be less than 55 dB. - According to
FIG. 5( b) illustrating the result of experiments for the wind ventilation amount, if the ratio of the second shaft direction height (h2) to the first shaft direction height (h1) is increased to be a predetermined value or more, it is identified that the wind ventilation amount is decreasing drastically. According to the embodiment shown inFIG. 5 , when the ratio of the second shaft direction height (h2) to the first shaft direction height (h1) is approximately 4 or more, it is identified that the wind ventilation amount is less than 30 M3/m3. - In other words, when the ratio (h2/h1) is a large value, that is, when the
first fan 210 which is the front fan is slimmer than thesecond fan 230 which is the rear fan, enough wind ventilation amount may be secured. - Because of that, it is preferable that the ratio of the second shaft direction height (h2) to the first shaft direction height (h1) is approximately 1 to less than 4, in an aspect of noise reduction and wind ventilation amount increase.
-
FIG. 6 illustrates a relation of noise with respect to sweep angle change of each fan. - As shown in
FIG. 6 , it is identified that noise is increasing drastically when the sweep angle is less than a predetermined value. In other words, when the sweep angle of each blade is less than 20 degree, noise is increasing steeply near to 60 dB. - Because of that, the sweep angle of each blade composing each fan may be 20 degree or more. Increasing the sweep angle blindly because of the noise reduction effect may deteriorate the wind ventilation amount. As a result, the sweep angle may be less than 60 degree.
- According to the result of experiments shown in
FIGS. 5 and 6 , it is preferable that the ratio of the second shaft direction height (h2) to the first shaft direction height (h1) is approximately between 1 and 4 and that the sweep angle of each blade composing each fan is approximately between 20 and 60. - Also, when the ratio (h2/h1) is determined in the limited internal space of the outdoor unit, the pitch angle of the blades composing each fan may be determined corresponding to the diameter of each fan.
- The pitch angle of the
first fan 210 may be approximately between 20 and 25 the pitch angle of thesecond fan 210 may be approximately between 25 and 35. That is, it is preferable that the pitch angle of each blade composing thesecond fan 230 which is the rear fan is formed lager than the pitch angle of each blade composing thefirst fan 210 which is the front fan. Here, it is assumed that the number of the blades of each fan is similar to each other. - Although not shown in the result of the experiments, when each rotation speed of the first and
second fans - That is, when the rotation speed of the
second fan 230 rotating in the opposite direction with respect to thefirst fan 210, arranged in rear of thefirst fan 210, is 2 to 3, the effect of noise reduction and wind ventilation amount increase may be achieved. In other words, the noise reduction/wind ventilation amount increase effect may be achieved by the method of rotating thesecond fan 230 having a predetermined thickness of a side surface at a fast speed. - According to the ventilating device and the outdoor unit including the same described above, the generated noise may be reduced as much as possible, with the improved wind ventilation amount. Since the wind ventilation amount is increasing, the outdoor unit may be compact-sized. Since the noise generation is reduced, user satisfaction may be improved.
- As mentioned above, the generated noise may be maximized and the wind ventilation efficiency may be improved according to the ventilating device and the outdoor unit including the same.
- Furthermore, according to the ventilating device and the outdoor unit including the same described above, ventilation efficiency may be improved and the outdoor unit may be compact-sized.
- Still further, according to the ventilating device and the outdoor unit including the same described above, noise generation is reduced and user satisfaction may be improved.
- It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (21)
1. An outdoor unit comprising:
a housing that includes an inlet and an outlet;
an outdoor heat exchanger provided in the housing;
a ventilating device in the housing between the inlet and the outlet, the ventilating device comprising:
a first fan having a plurality of first blades arranged about a first shaft in a radial direction;
a second fan having a plurality of second blades arranged about a second shaft in the radial direction, wherein the first shaft of the first fan and the second shaft of the second fan are arranged on a same axis, and a shaft direction height of each first blade of the first fan is different from a shaft direction height of each second blade of the second fan; and
at least one motor configured to rotate the first fan in a first rotational direction and to rotate the second fan in a second rotational direction that is different than the first rotational direction.
2. The outdoor unit of claim 1 , wherein the first fan is provided between the outdoor heat exchanger and the second fan.
3. The outdoor unit of claim 2 , wherein the second fan to generate a pressure difference to make external air drawn via the inlet and the air is heat-exchanged by the outdoor heat exchanger, and the air is discharged via the outlet.
4. The outdoor unit of claim 1 , wherein the shaft direction height of each second blade of the second fan is 1 to 4 times more than the shaft direction height of each first blade of the first fan.
5. The outdoor unit of claim 1 , wherein each first blade of the first fan and each second blade of the second fan have a pitch angle within a range of 20 degrees to 30 degrees.
6. The outdoor unit of claim 1 , wherein each first blade of the first fan and each second blade of the second fan have a sweep angle within a range of 20 degrees to 60 degrees.
7. The outdoor unit of claim 1 , wherein the at least one motor includes:
a first motor to drive the first fan; and
a second motor to drive the second fan.
8. The outdoor unit of claim 7 , wherein the first motor is arranged in a first direction and the second motor is arranged in a second direction that is opposite to the first direction.
9. The outdoor unit of claim 8 , wherein a rotational speed of the first motor is different than a rotational speed of the second motor.
10. The outdoor unit of claim 9 , wherein the rotational speed of the second motor is greater than the rotational speed of the first motor.
11. The outdoor unit of claim 10 , wherein the rotational speed of the second motor is 2 to 3 times more than the rotational speed of the first motor.
12. The outdoor unit of claim 1 , wherein each first blade of the first fan has a different directional shape than each second blade of the second fan.
13. A ventilating device comprising:
a first fan having a plurality of first blades arranged in a radial direction;
a second fan having a plurality of second blades arranged in the radial direction;
a first motor to drive the first fan; and
a second motor to drive the second fan,
wherein each first blade of the first fan has a different directional slope than each second blade of the second fan, and a shaft direction height of each second blade of the second fan is greater than a shaft direction height of each first blade of the first fan.
14. The ventilating device of claim 13 , wherein the shaft direction height of each second blade of the second fan is 1 to 4 times more than the height of each first blade of the first fan.
15. The ventilating device of claim 13 , wherein each first blade of the first fan and each second blade of the second fan have a pitch angle within a range of 20 degrees to 30 degrees.
16. The ventilating device of claim 13 , wherein each first blade of the first fan and each second blade of the second fan have a sweep angle within a range of 20 degrees to 60 degrees.
17. The ventilating device of claim 13 , wherein the first motor is arranged in a first direction and the second motor is arranged in a second direction, and a single motor mount is located therebetween.
18. The ventilating device of claim 17 , wherein a rotational speed of the second motor is greater than a rotational speed of the first motor.
19. The ventilating device of claim 18 , wherein the rotational speed of the second motor is 2 to 3 times more than the rotational speed of the first motor.
20. The ventilating device of claim 13 , wherein the first motor rotates the first blades of the first fan in a first rotational direction and the second fan rotates the second blades of the second fan in a second rotational direction that is opposite to the first rotational direction.
21. An apparatus comprising:
a housing having an inlet and an outlet;
a heat exchanger provided in the housing;
a ventilating device in the housing between the inlet and the outlet, the ventilating device comprising:
a first fan having a plurality of first blades to rotate about a first shaft in a first rotational direction;
a second fan having a plurality of second blades to rotate about a second shaft in a second rotational axis, wherein the first shaft and the second shaft are arranged along a straight line, a height of one of the second blades of the second fan is greater than a height of each second blade of the second fan, and the first fan is provided between the heat exchanger and the second fan; and
a motor device to rotate the first blades of the first fan in the first rotational direction and to rotate the second blades of the second fan in the second rotational direction.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020100005537A KR20110085646A (en) | 2010-01-21 | 2010-01-21 | Ventilating device and the refrigerator have the same |
KR10-2010-0005537 | 2010-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110174011A1 true US20110174011A1 (en) | 2011-07-21 |
Family
ID=43746617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/010,494 Abandoned US20110174011A1 (en) | 2010-01-21 | 2011-01-20 | Ventilating device and outdoor unit having the same |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110174011A1 (en) |
EP (1) | EP2354685B1 (en) |
KR (1) | KR20110085646A (en) |
CN (1) | CN102135298B (en) |
ES (1) | ES2549584T3 (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110312264A1 (en) * | 2009-03-12 | 2011-12-22 | Lg Electronic, Inc. | Outdoor unit for air conditioner |
WO2013055036A1 (en) | 2011-10-13 | 2013-04-18 | Lg Electronics Inc. | Air conditioner |
US20140131016A1 (en) * | 2012-11-15 | 2014-05-15 | JVS Associates, Inc. | Contra-Rotating Fan Arrangement And Fan Drive System For Evaporative Cooling Equipment |
CN103912920A (en) * | 2014-03-18 | 2014-07-09 | 张伟斌 | Outdoor air purification plant |
US8951012B1 (en) | 2014-02-10 | 2015-02-10 | JVS Associates, Inc. | Contra-rotating axial fan transmission for evaporative and non-evaporative cooling and condensing equipment |
WO2016142664A1 (en) * | 2015-03-09 | 2016-09-15 | Silentair Group Limited | Improved condenser unit |
US20170167773A1 (en) * | 2015-12-14 | 2017-06-15 | Lg Electronics Inc. | Orifice for air conditioner |
US20170314802A1 (en) * | 2015-03-16 | 2017-11-02 | Gree Electric Appliances, Inc. Of Zhuhai | Method and System for Controlling Air Conditioner Outdoor Unit |
US10378781B2 (en) * | 2015-06-19 | 2019-08-13 | Mitsubishi Electric Corporation | Outdoor unit for refrigeration cycle apparatus, and refrigeration cycle apparatus |
US10533577B2 (en) | 2013-04-22 | 2020-01-14 | Lennox Industries Inc. | Fan systems |
EP3708842A4 (en) * | 2019-01-30 | 2020-09-16 | GD Midea Air-Conditioning Equipment Co., Ltd. | Fan and air conditioner indoor unit having same |
JP2021526194A (en) * | 2018-07-09 | 2021-09-30 | 広東美的環境電器制造有限公司Gd Midea Environment Appliances Mfg Co.,Ltd. | Fan |
EP3842644A4 (en) * | 2018-10-15 | 2021-11-24 | Guangdong Midea White Home Appliance Technology Innovation Center Co., Ltd. | Counter-rotating fan |
EP3940304A4 (en) * | 2019-09-27 | 2022-06-22 | Midea Welling Motor Technology (Shanghai) Co., Ltd | Air conditioner outdoor unit and air conditioning apparatus |
US20220349409A1 (en) * | 2021-04-29 | 2022-11-03 | Napalmi Tietotekniikka Oy | Fan |
US11512703B2 (en) * | 2018-07-09 | 2022-11-29 | Gd Midea Environment Appliances Mfg Co., Ltd. | Fan for adjusting air flow |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103983071B (en) * | 2014-05-30 | 2017-01-04 | 合肥华凌股份有限公司 | Refrigerator |
CN105588230A (en) * | 2014-12-12 | 2016-05-18 | 海信(山东)空调有限公司 | Outdoor unit of air conditioner |
CN104534740A (en) * | 2014-12-18 | 2015-04-22 | 刘小江 | Refrigerating and heating method and device through reverse dual rotors and plate-fin type backflow thin channel or micro channel |
KR102395851B1 (en) * | 2015-04-08 | 2022-05-10 | 삼성전자주식회사 | Fan assembly and air conditioner having the same |
CN105674432A (en) * | 2016-03-06 | 2016-06-15 | 孙海潮 | Air conditioning outdoor unit |
JP6428833B2 (en) * | 2017-04-14 | 2018-11-28 | ダイキン工業株式会社 | Propeller fan |
WO2020077795A1 (en) * | 2018-10-15 | 2020-04-23 | 广东美的白色家电技术创新中心有限公司 | Contra-rotating fan |
CN109668256B (en) * | 2018-12-20 | 2021-04-09 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and storage medium |
CN109958637A (en) * | 2019-04-22 | 2019-07-02 | 广东美的制冷设备有限公司 | The fan assembly of air-conditioner outdoor unit and air-conditioner outdoor unit with it |
CN110044022A (en) * | 2019-04-22 | 2019-07-23 | 广东美的制冷设备有限公司 | The control method of air-conditioner outdoor unit |
CN109958639B (en) * | 2019-04-22 | 2021-01-22 | 广东美的制冷设备有限公司 | Fan assembly of air conditioner outdoor unit and air conditioner outdoor unit with same |
CN110044008A (en) * | 2019-04-22 | 2019-07-23 | 广东美的制冷设备有限公司 | The control method of air-conditioner outdoor unit |
CN110260491A (en) * | 2019-07-01 | 2019-09-20 | 芜湖美智空调设备有限公司 | Progress control method, device, air conditioner and computer readable storage medium |
CN110454937B (en) * | 2019-08-05 | 2021-10-26 | 广东美的制冷设备有限公司 | Air conditioner and control method and device thereof |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5967748A (en) * | 1996-06-25 | 1999-10-19 | Lg Electronics, Inc. | Fan shroud for outdoor unit of air conditioner |
US6394754B1 (en) * | 1999-11-02 | 2002-05-28 | Lg Electronics, Co. Ltd. | Axial flow fan |
US6537019B1 (en) * | 2000-06-06 | 2003-03-25 | Intel Corporation | Fan assembly and method |
US6565334B1 (en) * | 1998-07-20 | 2003-05-20 | Phillip James Bradbury | Axial flow fan having counter-rotating dual impeller blade arrangement |
US20050106026A1 (en) * | 2003-03-13 | 2005-05-19 | Sanyo Denki Co., Ltd. | Counterrotating axial blower |
US7445423B2 (en) * | 2005-09-14 | 2008-11-04 | Sanyo Denki Co., Ltd. | Counter-rotating axial-flow fan |
US20100071870A1 (en) * | 2008-09-22 | 2010-03-25 | Clark Equipment Company | Multiple air flow paths using single axial fan |
US20110052433A1 (en) * | 2009-08-26 | 2011-03-03 | Hon Hai Precision Industry Co., Ltd. | Fan having two impellers |
US8191381B2 (en) * | 2008-01-30 | 2012-06-05 | Lg Electronics Inc. | Outdoor unit of air-conditioner and fan used therefor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10141708A (en) * | 1996-11-12 | 1998-05-29 | Matsushita Electric Ind Co Ltd | Outdoor unit of air conditioner |
KR100402885B1 (en) * | 2001-08-14 | 2003-10-22 | 엘지전자 주식회사 | Axial fan for Indoor unit of airconditioner |
JP5003198B2 (en) * | 2006-06-19 | 2012-08-15 | パナソニック株式会社 | Air conditioner outdoor unit |
-
2010
- 2010-01-21 KR KR1020100005537A patent/KR20110085646A/en not_active Application Discontinuation
-
2011
- 2011-01-20 ES ES11151528.4T patent/ES2549584T3/en active Active
- 2011-01-20 EP EP11151528.4A patent/EP2354685B1/en not_active Not-in-force
- 2011-01-20 US US13/010,494 patent/US20110174011A1/en not_active Abandoned
- 2011-01-21 CN CN201110027023.8A patent/CN102135298B/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5967748A (en) * | 1996-06-25 | 1999-10-19 | Lg Electronics, Inc. | Fan shroud for outdoor unit of air conditioner |
US6565334B1 (en) * | 1998-07-20 | 2003-05-20 | Phillip James Bradbury | Axial flow fan having counter-rotating dual impeller blade arrangement |
US6394754B1 (en) * | 1999-11-02 | 2002-05-28 | Lg Electronics, Co. Ltd. | Axial flow fan |
US6537019B1 (en) * | 2000-06-06 | 2003-03-25 | Intel Corporation | Fan assembly and method |
US20050106026A1 (en) * | 2003-03-13 | 2005-05-19 | Sanyo Denki Co., Ltd. | Counterrotating axial blower |
US7445423B2 (en) * | 2005-09-14 | 2008-11-04 | Sanyo Denki Co., Ltd. | Counter-rotating axial-flow fan |
US8191381B2 (en) * | 2008-01-30 | 2012-06-05 | Lg Electronics Inc. | Outdoor unit of air-conditioner and fan used therefor |
US20100071870A1 (en) * | 2008-09-22 | 2010-03-25 | Clark Equipment Company | Multiple air flow paths using single axial fan |
US20110052433A1 (en) * | 2009-08-26 | 2011-03-03 | Hon Hai Precision Industry Co., Ltd. | Fan having two impellers |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110312264A1 (en) * | 2009-03-12 | 2011-12-22 | Lg Electronic, Inc. | Outdoor unit for air conditioner |
US9416982B2 (en) * | 2009-03-12 | 2016-08-16 | Lg Electronics Inc. | Outdoor unit for air conditioner |
US9494358B2 (en) | 2011-10-13 | 2016-11-15 | Lg Electronics Inc. | Air conditioner |
WO2013055036A1 (en) | 2011-10-13 | 2013-04-18 | Lg Electronics Inc. | Air conditioner |
CN103874888A (en) * | 2011-10-13 | 2014-06-18 | Lg电子株式会社 | Air conditioner |
EP2766666A4 (en) * | 2011-10-13 | 2015-07-08 | Lg Electronics Inc | Air conditioner |
US20140131016A1 (en) * | 2012-11-15 | 2014-05-15 | JVS Associates, Inc. | Contra-Rotating Fan Arrangement And Fan Drive System For Evaporative Cooling Equipment |
US10533577B2 (en) | 2013-04-22 | 2020-01-14 | Lennox Industries Inc. | Fan systems |
US8951012B1 (en) | 2014-02-10 | 2015-02-10 | JVS Associates, Inc. | Contra-rotating axial fan transmission for evaporative and non-evaporative cooling and condensing equipment |
US9322407B2 (en) | 2014-02-10 | 2016-04-26 | JVS Associates, Inc. | Contra-rotating transmission |
CN103912920A (en) * | 2014-03-18 | 2014-07-09 | 张伟斌 | Outdoor air purification plant |
WO2015139640A1 (en) * | 2014-03-18 | 2015-09-24 | 张伟斌 | Outdoor air purification device |
WO2016142664A1 (en) * | 2015-03-09 | 2016-09-15 | Silentair Group Limited | Improved condenser unit |
US10612810B2 (en) * | 2015-03-16 | 2020-04-07 | Gree Electric Appliances, Inc. Of Zhuhai | Method and system for controlling air conditioner outdoor unit |
US20170314802A1 (en) * | 2015-03-16 | 2017-11-02 | Gree Electric Appliances, Inc. Of Zhuhai | Method and System for Controlling Air Conditioner Outdoor Unit |
US10378781B2 (en) * | 2015-06-19 | 2019-08-13 | Mitsubishi Electric Corporation | Outdoor unit for refrigeration cycle apparatus, and refrigeration cycle apparatus |
US10054355B2 (en) * | 2015-12-14 | 2018-08-21 | Lg Electronics Inc. | Orifice for air conditioner |
US20170167773A1 (en) * | 2015-12-14 | 2017-06-15 | Lg Electronics Inc. | Orifice for air conditioner |
JP2021526194A (en) * | 2018-07-09 | 2021-09-30 | 広東美的環境電器制造有限公司Gd Midea Environment Appliances Mfg Co.,Ltd. | Fan |
JP7030216B2 (en) | 2018-07-09 | 2022-03-04 | 広東美的環境電器制造有限公司 | Fan |
US11493050B2 (en) * | 2018-07-09 | 2022-11-08 | Gd Midea Environment Appliances Mfg Co., Ltd. | Fan |
US11512703B2 (en) * | 2018-07-09 | 2022-11-29 | Gd Midea Environment Appliances Mfg Co., Ltd. | Fan for adjusting air flow |
EP3842644A4 (en) * | 2018-10-15 | 2021-11-24 | Guangdong Midea White Home Appliance Technology Innovation Center Co., Ltd. | Counter-rotating fan |
US11506211B2 (en) | 2018-10-15 | 2022-11-22 | Guangdong Midea White Home Appliance Technology Innovation Center Co., Ltd. | Counter-rotating fan |
EP3708842A4 (en) * | 2019-01-30 | 2020-09-16 | GD Midea Air-Conditioning Equipment Co., Ltd. | Fan and air conditioner indoor unit having same |
EP3940304A4 (en) * | 2019-09-27 | 2022-06-22 | Midea Welling Motor Technology (Shanghai) Co., Ltd | Air conditioner outdoor unit and air conditioning apparatus |
US20220349409A1 (en) * | 2021-04-29 | 2022-11-03 | Napalmi Tietotekniikka Oy | Fan |
US11732721B2 (en) * | 2021-04-29 | 2023-08-22 | Napalmi Tietotekniikka Oy | Fan |
Also Published As
Publication number | Publication date |
---|---|
ES2549584T3 (en) | 2015-10-29 |
EP2354685A2 (en) | 2011-08-10 |
EP2354685A3 (en) | 2012-12-05 |
EP2354685B1 (en) | 2015-07-29 |
KR20110085646A (en) | 2011-07-27 |
CN102135298B (en) | 2014-02-26 |
CN102135298A (en) | 2011-07-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2354685B1 (en) | Ventilating device and outdoor unit having the same | |
US4971143A (en) | Fan stator assembly for heat exchanger | |
JP4015016B2 (en) | Turbofan and air conditioner using the same | |
US9964118B2 (en) | Sirocco fan and air conditioner having same | |
CN104566672A (en) | Window type air-conditioner | |
CN204678510U (en) | Window-mounted air conditioner | |
US5775125A (en) | Integrated air conditioner | |
CN208011892U (en) | Cabinet air-conditioner, air conditioner | |
US20140314575A1 (en) | Turbo fan | |
US6343484B1 (en) | Air blowing apparatus of air conditioner | |
KR20060128172A (en) | Ceiling-installed air conditioner having ceiling fan | |
JP3490678B2 (en) | Sirocco fan for window type air conditioner | |
WO2006080599A2 (en) | Heat exchange unit with vent | |
WO2022205767A1 (en) | Axial-flow wind wheel, axial-flow fan, and air conditioner | |
CN210601949U (en) | Floor type air conditioner indoor unit and air conditioner | |
KR100504485B1 (en) | Air-Conditioner | |
CN107614981B (en) | Outdoor unit for refrigeration cycle device, and refrigeration cycle device | |
CN208237996U (en) | air conditioner | |
CN215336772U (en) | Air conditioner outer unit casing and air conditioner outer unit | |
CN216281711U (en) | Air conditioner | |
CN216953471U (en) | Wide-angle flow guide grid, heat exchanger with wide-angle flow guide grid and air conditioning system | |
JP3812467B2 (en) | Centrifugal blower impeller and centrifugal blower using the impeller | |
CN211146687U (en) | Indoor unit and air conditioner with same | |
CN212132710U (en) | Window type air conditioner | |
KR100477313B1 (en) | Housing structure of air conditioning blower |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: LG ELECTRONICS INC., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, JUNG HOON;MOON, DONG SOO;LEE, JUNG WOO;REEL/FRAME:025671/0316 Effective date: 20110118 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |