Patent Grant
11384952
The present application is a continuation application of PCT application No. PCT/CN2017/118317, filed Dec. 25, 2017, herein incorporated by reference, which claims the priority of Chinese patent application No. 201710445762.6, filed in the Chinese Patent Office on Jun. 14, 2017, and entitled “Air duct machine with switchable air-out directions and control method thereof and air-conditioning apparatus”, the entire contents of which are herein incorporated by reference.
The present application relates to the technical field of air conditioning, in particular to an air duct machine with switchable air-out directions and a control method thereof and an air-conditioning apparatus.
An air duct machine is short for a duct-type air conditioning equipment, and is a type of central air conditioner. Generally, it connects an indoor unit and an outdoor unit, which are connected through a copper pipe. An air supply pipe is led from indoors and introduced to each room, and air is returned to the indoor unit through an air return pipe, and then cooled and mixed with fresh air to supply fresh air again.
As to an air duct machine in the prior art, to satisfy different air-out requirements, a cross-flow fan should be respectively arranged at a sideward vent and a downward vent. When one fan rotates as an air supply fan, the other fan is static which is at an air return position, and its motion state has a great influence on return air, thereby impeding entrance of return air and reducing the air return amount, and the contact between return air and blades of a static fan will generate unnecessary noises.
In order to overcome the above technical shortcomings, a technical problem to be solved in the present application is to provide an air duct machine with switchable air-out directions and a control method thereof and an air-conditioning apparatus, so as to increase the air output amount and lower the noise.
In order to solve the above technical problem, the present application provides an air duct machine with switchable air-out directions, including a housing, a first fan, a second fan and a control mechanism, wherein the first fan and the second fan are both mounted in the housing, the housing has a first vent and a second vent, the first vent is disposed on the side of the first fan, the second vent is disposed on the side of the second fan, and a communicating air channel is formed between the first vent and the second vent;
in an air-out state of the first vent, the first fan serves as an air-out fan and the second fan serves as a regulating fan, and the control mechanism is configured to control the first fan to supply air to the first vent and to control the second fan to rotate in a direction opposite to a direction in which air is supplied to the second vent; and
in an air-out state of the second vent, the second fan serves as an air-out fan and the first fan serves as a regulating fan, the control mechanism is configured to control the second fan to supply air to the second vent and to control the first fan to rotate in a direction opposite to a direction in which air is supplied to the first vent.
Further, the first fan and the second fan are both cross-flow fans.
Further, the first fan and the second fan are configured to rotate in the same direction.
Further, the first vent is located at the lateral side of the housing, and the second vent is located at the bottom of the housing.
Further, the range of a rotational speed W1 of the air-out fan is 400 r/min-1400 r/min.
Further, a rotational speed W2 of the regulating fan and the rotational speed W1 of the air-out fan satisfy the following relationship:
W2=W1/3+A
wherein 60 r/min<A<120 r/min.
The present application further correspondingly provides a control method of an air duct machine with switchable air-out directions, including:
in an air-out state of a first vent, causing the first fan which serves as an air-out fan to rotate towards a direction in which air is supplied to the first vent, and causing the second fan which serves as a regulating fan to rotate towards a direction opposite to a direction in which air is supplied to the second vent;
in an air-out state of the second vent, causing the second fan which serves as an air-out fan to rotate towards a direction in which air is supplied to the second vent, and causing the first fan which serves as a regulating fan to rotate towards a direction opposite to a direction in which air is supplied to the first vent.
Further, the range of a rotational speed W1 of the air-out fan is 400 r/min-1400 r/min.
Further, a rotational speed W2 of the regulating fan and the rotational speed W1 of the air-out fan satisfy the following relationship:
W2=W1/3+A
wherein 60 r/min<A<120 r/min.
The present application further provides an air-conditioning apparatus which includes the above air duct machine with switchable air-out directions.
Therefore, based on the above technical solution, in the case of an air duct machine with switchable air-out directions and a control method thereof in the present application, through linkage control of rotation of two fans, when one fan serves as an air supply fan, the other fan is controlled as a regulating fan to rotate in a direction opposite to a direction in which air is supplied to the corresponding vent, and the reverse rotation of the regulating fan reduces obstruction to return air, optimizes a flow field of return air, enlarges the area of return air, increases the air output amount, and effectively lowers the noise. An air-conditioning apparatus provided in the present application also correspondingly has the above beneficial technical effects.
Accompanying drawings illustrated herein are used for providing a further understanding of the present application, and constitute a part of the present application. Schematic embodiments of the present application and illustrations thereof are merely for explaining the present application, rather than constituting improper limitations to the present application. In the drawings:
A further detailed description will be given below on technical solutions of the present application through accompanying drawings and embodiments.
Specific embodiments of the present application are for the convenience of a further description of concepts, technical problems to be solved, technical features constituting technical solutions, and technical effects brought thereby, of the present application. It should be noted that illustrations of these embodiments do not constitute limitations to the present application. In addition, the technical features involved in the embodiments of the present application described below can be combined with each other as long as they are not conflicted with one another.
In a schematic embodiment of an air duct machine with switchable air-out directions of the present application, as shown in
as shown in
as shown in
In the schematic embodiment, an air duct machine with switchable air-out directions of the present application utilizes a control mechanism to achieve linkage control of a first fan 3 and a second fan 4. As shown in
In an air duct machine with switchable air-out directions of the present application, a regulating fan rotates in a direction opposite to a direction in which air is supplied to a corresponding vent, such that the regulating fan exerts no negative effect on a flow field in a whole air channel, and further has a positive effect on the air channel flow field to some extent, so as to increase the air output amount and lower the noise.
In the above embodiment, the first fan 3 and the second fan 4 are both particularly cross-flow fans. Practice proves that when the fans in the air duct machine with switchable air-out directions of the present application are cross-flow fans, the effects of increasing the air output amount and lowering the noise are especially dramatic.
Preferably, as shown in
In order to demonstrate effects of an air duct machine with switchable air-out directions in increasing the air output amount, the inventor firstly measured data as shown in Table 1 below under the condition of only turning on an air-out fan (a rotational speed of a regulating fan is 0):
Through a series of experiments, it was found that in order to enable an air duct machine with switchable air-out directions to maximize its performance, preferably, the range of a rotational speed W1 of an air-out fan is 400 r/min-1400 r/min.
Afterwards, the inventor found in measured data that when a rotational speed W2 of a regulating fan and a rotational speed W1 of an air-out fan are in a certain proportion, the rotational speed W2 of the regulating fan and the rotational speed W1 of the air-out fan satisfy the following relationship:
W2=W1/3+A
wherein A is a corrected parameter, and 60 r/min<A<120 r/min.
Within the preferred proportional range, a regulating fan exerts no negative effect on a flow field in the whole air channel, and further has a positive effect on the air channel flow field to some extent, and the effects of increasing the air output amount and lowering the noise of an air duct machine with switchable air-out directions are especially dramatic. Sideward air outlet of a first vent 1 (a first fan 3 is an air-out fan, and a second fan 4 is a regulating fan) is used as an example to measure experimental data as shown in Table 2 below:
The present application correspondingly provides a control method of the abovementioned air duct machine with switchable air-out directions, including:
in an air-out state of the first vent 1, causing the first fan 3 which serves as an air-out fan to rotate towards a direction in which air is supplied to the first vent 1, and causing the second fan 4 which serves as a regulating fan to rotate towards a direction opposite to a direction in which air is supplied to the second vent 2;
in an air-out state of the second vent 2, causing the second fan 4 which serves as an air-out fan to rotate towards a direction in which air is supplied to the second vent 2, and causing the first fan 3 which serves as a regulating fan to rotate towards a direction opposite to a direction in which air is supplied to the first vent 1.
In the schematic embodiment, a control method of an air duct machine with switchable air-out directions of the present application achieves linkage control of a first fan 3 and a second fan 4. As shown in
Correspondingly, the range of a rotational speed W1 of the air-out fan is 400 r/min-1400 r/min, such that an air duct machine with switchable air-out directions can maximize its performance.
Still further, a rotational speed W2 of the regulating fan and the rotational speed W1 of the air-out fan satisfy the following relationship:
W2=W1/3+A
wherein 60 r/min<A<120 r/min.
Within the preferred proportional range, a regulating fan exerts no negative effect on a flow field in the whole air channel, and further has a positive effect on the air channel flow field to some extent, and the effects of increasing the air output amount and lowering the noise of an air duct machine with switchable air-out directions are especially dramatic.
The present application further provides an air-conditioning apparatus which includes the abovementioned air duct machine with switchable air-out directions. Since the air duct machine with switchable air-out directions of the present application can increase the air output amount and lower the noise, correspondingly, the air-conditioning apparatus of the present application also has the above beneficial technical effects, which will not be repeated herein.
A detailed description is given above on embodiments of the present application in combination with examples, however, the present application is not limited to the described embodiments. For those skilled in the art, various changes, modifications, equivalent substitutions and transformations made to these embodiments without departing from principles and essential spirits of the present application shall all fall within the protection scope of the present application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201710445762.6 | Jun 2017 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2017/118317 | 12/25/2017 | WO | 00 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2018/227924 | 12/20/2018 | WO | A |
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