SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent.
Therefore, the utility model discloses a first aim at provides an air conditioning system to realize setting up the integrated setting of processing part in control terminal, thereby reduce the potential safety hazard when using combustible refrigerant.
A second object of the present invention is to provide an indoor unit.
To achieve the above object, an embodiment of a first aspect of the present invention provides an air conditioning system, including: the indoor unit comprises a power supply part, an action component and a first communication part, wherein the power supply part is connected with the action component and the first communication part so as to supply power to the action component and the first communication part, and the first communication part is connected with the action component so as to control the action component; the control terminal comprises a human-computer interaction part, a processing part and a second communication part, wherein the processing part is connected with the human-computer interaction part, the processing part is also connected with the second communication part, and the second communication part is communicated with the first communication part.
According to the utility model provides an air conditioning system, indoor set includes power supply portion, action part and first communication portion, and power supply portion links to each other with action part and first communication portion to for action part and the power supply of first communication portion, first communication portion links to each other with the control action part with the action part, and control terminal includes human-computer interaction portion, processing portion and second communication portion, and processing portion links to each other with human-computer interaction portion, and processing portion still links to each other with second communication portion, and second communication portion communicates with first communication portion. From this, through with the integrated setting of processing part in control terminal, can no longer set up processing part in the indoor set, and then reduce the automatically controlled components and parts and the electric contact in the indoor set, effectively avoid the appearance of automatically controlled phenomenon of striking sparks, potential safety hazard when reducing the flammable refrigerant of use.
In addition, according to the present invention, the air conditioning system can further have the following additional technical features:
in some examples, the action member includes a strong electric action member and a weak electric action member, and the power supply portion has a strong electric power supply terminal and a weak electric power supply terminal, wherein the strong electric power supply terminal is connected to the strong electric action member, the weak electric power supply terminal is connected to the power supply input terminal of the first communication portion, and the weak electric power supply terminal is further connected to the weak electric action member.
In some examples, the action member includes a strong electric action member and a weak electric action member, the power supply portion has a strong electric power supply terminal and a weak electric power supply terminal, and the first communication portion has a power supply module, wherein the strong electric power supply terminal is connected to the strong electric action member, and the weak electric power supply terminal is connected to a power supply input terminal of the first communication portion; the input end of the power supply module of the first communication part is connected with the power supply input end of the first communication part, and the output end of the power supply module of the first communication part is connected with the weak current action part.
In some examples, the human-computer interaction portion includes an operation component and a display component, and the operation component and the display component are connected with the processing portion.
In some examples, the second communication part communicates with the first communication part in a WiFi communication manner or a bluetooth communication manner.
In some examples, the high electric motion components include an indoor fan and a heater, and the low electric motion components include a stepper motor and a sensor.
In some examples, the first communication part is used for receiving the state signal sent by the action component and sending the state signal to the processing part through communication with the second communication part; the second communication part is used for receiving the control signal sent by the processing part and sending the control signal to a corresponding action component through communication with the first communication part.
In order to achieve the above object, the second aspect of the present invention provides an indoor unit, including: an operation member; a first communication unit connected to the operating member to control the operating member, the first communication unit communicating with a control terminal; a power supply portion connected to the action member and the first communication portion to supply power to the action member and the first communication portion.
According to the utility model provides an indoor set, first communication portion links to each other with the control action part with the action part, and first communication portion communicates with control terminal, and power supply portion links to each other with action part and first communication portion to supply power for action part and first communication portion. Therefore, the utility model discloses a processing part can no longer be set up in the indoor set, and then reduce the automatically controlled components and parts and the electrical contact in the indoor set, effectively avoid the appearance of automatically controlled phenomenon of striking sparks, potential safety hazard when reducing the use combustible refrigerant.
In addition, according to the present invention, the indoor unit can further have the following additional technical features:
in some examples, the action member includes a strong electric action member and a weak electric action member, and the power supply portion has a strong electric power supply terminal and a weak electric power supply terminal, wherein the strong electric power supply terminal is connected to the strong electric action member, the weak electric power supply terminal is connected to the power supply input terminal of the first communication portion, and the weak electric power supply terminal is further connected to the weak electric action member.
In some examples, the action member includes a strong electric action member and a weak electric action member, the power supply portion has a strong electric power supply terminal and a weak electric power supply terminal, and the first communication portion has a power supply module, wherein the strong electric power supply terminal is connected to the strong electric action member, and the weak electric power supply terminal is connected to a power supply input terminal of the first communication portion; the input end of the power supply module of the first communication part is connected with the power supply input end of the first communication part, and the output end of the power supply module of the first communication part is connected with the weak current action part.
In some examples, the first communication part communicates with the control terminal in a WiFi communication manner or a bluetooth communication manner.
In some examples, the high electric motion components include an indoor fan and a heater, and the low electric motion components include a stepper motor and a sensor.
In some examples, the first communication part is used for receiving the state signal sent by the action component and sending the state signal to the control terminal through communication with the control terminal; the first communication part is also used for receiving the control signal sent by the control terminal and sending the control signal to the corresponding action component.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The air conditioning system and the indoor unit according to the embodiments of the present invention are described below with reference to the drawings.
Fig. 1 is a block diagram of an air conditioning system according to an embodiment of the present invention. As shown in fig. 1, an air conditioning system according to an embodiment of the present invention includes an indoor unit 1 and a control terminal 2.
The indoor unit 1 comprises a power supply part 10, an action component 11 and a first communication part 12, wherein the power supply part 10 is connected with the action component 11 and the first communication part 12 to supply power to the action component 11 and the first communication part 12, and the first communication part 12 is connected with the action component 11 to control the action component 11; the control terminal 2 includes a human-computer interaction unit 20, a processing unit 21, and a second communication unit 22, wherein the processing unit 21 is connected to the human-computer interaction unit 20, the processing unit 21 is further connected to the second communication unit 22, and the second communication unit 22 communicates with the first communication unit 12.
The processing unit 21 integrated in the control terminal 2 can control the operating member 11 in the indoor unit 1.
It can be understood that the user can input a control command through the human-computer interaction portion 20, the human-computer interaction portion 20 sends the control command input by the user to the processing portion 21, the processing portion 21 processes the control command to generate a control signal and sends the control signal to the second communication portion 22, the second communication portion 22 receives the control signal sent by the processing portion 21 and sends the control signal to the corresponding action member 11 through communicating with the first communication portion 12 to control the action of the corresponding action member 11, the action member 11 sends a status signal to the first communication portion 12 after completing the action according to the control signal, the first communication portion 12 receives the status signal sent by the action member 11 and sends the status signal to the processing portion 21 through communicating with the second communication portion 22, the processing portion 21 processes the received status signal and controls the human-computer interaction portion 20 to display, to prompt the user that the action is complete.
It should also be said that control terminal 2 can be the air conditioner remote controller, and processing portion 21 can be the automatically controlled board of air conditioner, that is to say, the utility model discloses an air conditioning system can be with processing portion 21 for example the integration of the automatically controlled board of air conditioner set up in control terminal 2 for example the air conditioner remote controller, from this, can no longer set up the automatically controlled board of air conditioner in indoor set 1, and then reduce automatically controlled components and parts and the electric contact in indoor set 1, effectively avoid the appearance of automatically controlled phenomenon of striking sparks, potential safety hazard when reducing the flammable refrigerant of use.
The second communication unit 22 communicates with the first communication unit 12 in a WiFi communication method or a bluetooth communication method.
Further, as shown in fig. 2, the operating member 11 includes a strong electric operating member 110 and a weak electric operating member 111, and the power supply portion 10 has a strong electric power supply terminal 10a and a weak electric power supply terminal 10b, wherein the strong electric power supply terminal 10a is connected to the strong electric operating member 110, the weak electric power supply terminal 10b is connected to the power supply input terminal 12a of the first communication portion 12, and the weak electric power supply terminal 10b is further connected to the weak electric operating member 111. Among them, the strong electric motion part 110 may include an indoor fan and a heater, and the weak electric motion part 111 may include a stepping motor and a sensor.
As one example, the power supply part 10 may be a DC-DC converter or an AC-DC converter.
The strong electricity may be electricity in an electric power system, and is used to drive a large-power electric device, that is, electricity output from the power supply unit 10 through the strong electricity supply terminal 10a may supply electricity to the strong electricity operating member 110 in the indoor unit 1, such as an indoor fan and a heater. The weak current may refer to a current and a voltage required for transmitting a signal for signal processing, that is, the power outputted from the power supply part 10 through the weak current power supply terminal 10b may supply power to the weak current action part 111 such as a stepping motor and a sensor in the indoor unit 1, and may also supply power to the first communication part 12.
Further, as shown in fig. 3, the operation member 11 includes a strong electric operation member 110 and a weak electric operation member 111, the power supply portion 10 has a strong electric power supply terminal 10a and a weak electric power supply terminal 10b, the first communication portion 12 has a power supply module 120, wherein the strong electric power supply terminal 10a is connected to the strong electric operation member 110, and the weak electric power supply terminal 10b is connected to the power supply input terminal 12a of the first communication portion 12; the input terminal 120a of the power module 120 of the first communication unit 12 is connected to the power input terminal 12a of the first communication unit 12, and the output terminal 120b of the power module 120 of the first communication unit 12 is connected to the weak current operating member 111.
It can be understood that the power supply part 10 can supply power to the strong electric action components 110 in the indoor unit 1, such as the indoor fan and the heater, through the electricity output by the strong electric power supply terminal 10a, the power supply part 10 can supply power to the first communication part 12 in the indoor unit 1, through the electricity output by the weak electric power supply terminal 10b, and meanwhile, the power supply part 10 can supply power to the weak electric action components 111, such as the stepping motor and the sensor, after the electricity output by the weak electric power supply terminal 10b is converted through the power supply module 120 in the first communication part 12.
That is, the weak current power supply terminal 10b of the power supply unit 10 may directly supply power to the weak current operation part 111, or may supply power to the weak current operation part 111 after being converted by the power supply module 120 in the first communication unit 12.
Further, as shown in fig. 2-3, the human-computer interaction portion 20 includes an operation component 200 and a display component 201, and the operation component 200 and the display component 201 are connected to the processing portion 21.
As an example, the operation component 200 may be, for example, an operation keyboard on an air conditioner remote controller, and the display component 201 may be, for example, a display screen on the air conditioner remote controller.
Further, the first communication unit 12 is configured to receive the status signal transmitted by the operating member 11 and transmit the status signal to the processing unit 21 by communicating with the second communication unit 22; the second communication unit 22 is configured to receive the control signal transmitted by the processing unit 21, and transmit the control signal to the corresponding operating member 11 by communicating with the first communication unit 12.
It can be understood that the user can input a control command through the operation module 200, for example, an operation keyboard on an air conditioner remote controller, the operation module 200 transmits the control command input by the user to the processing unit 21, the processing unit 21 processes the control command to generate a control signal and transmits the control signal to the second communication unit 22, the second communication unit 22 receives the control signal transmitted by the processing unit 21 and transmits the control signal to the corresponding action member 11 by communicating with the first communication unit 12 to control the action of the corresponding action member 11, the action member 11 transmits a status signal to the first communication unit 12 after completing the action according to the control signal, the first communication unit 12 receives the status signal transmitted by the action member 11 and transmits the status signal to the processing unit 21 by communicating with the second communication unit 22, the processing unit 21 processes the received status signal, the control display component 201, such as a display screen on an air conditioner remote control, displays to prompt the user that the action is complete.
For example, when a user inputs a control command, such as a "temperature rise" control command, through the operation member 200, the operation member 200 transmits the "temperature rise" control command input by the user to the processing unit 21, the processing unit 21 processes the "temperature rise" control command to generate a control signal and transmits the control signal to the second communication unit 22, the second communication unit 22 receives the control signal transmitted by the processing unit 21 and transmits the control signal to the indoor fan by communicating with the first communication unit 12, the indoor fan completes an action, such as turning on, according to the control signal, transmits a status signal, such as turning on, to the first communication unit 12, the first communication unit 12 receives the status signal transmitted by the indoor fan and transmits the status signal to the processing unit 21 by communicating with the second communication unit 22, the processing unit 21 processes the received status signal, the control display component 201 displays to prompt the user that the indoor fan is completely turned on.
When a user inputs a control command, such as a "wind swing" control command, through the operation assembly 200, the operation assembly 200 sends the "wind swing" control command input by the user to the processing unit 21, the processing unit 21 processes the "wind swing" control command to generate a control signal and sends the control signal to the second communication unit 22, the second communication unit 22 receives the control signal sent by the processing unit 21 and sends the control signal to the stepping motor by communicating with the first communication unit 12, the stepping motor sends a status signal, such as an open status or a closed status, to the first communication unit 12 after completing an action, such as opening or closing, according to the control signal, the first communication unit 12 receives the status signal sent by the stepping motor and sends the status signal to the processing unit 21 by communicating with the second communication unit 22, the processing unit 21 processes the received status signal, the display component 201 is controlled to display to prompt the user that the stepping motor is turned on or off.
Therefore, the processing part 21 is integrally arranged in the control terminal 2, the processing part 21 can be omitted in the indoor unit 1, electric control components and electric contacts in the indoor unit 1 can be reduced, the electric control ignition phenomenon is effectively avoided, and potential safety hazards during use of combustible refrigerants are reduced.
In summary, according to the embodiment of the present invention, the indoor unit includes power supply portion, action part and first communication portion, and power supply portion links to each other with action part and first communication portion to for action part and first communication portion power supply, first communication portion links to each other with control action part with action part, and control terminal includes human-computer interaction portion, processing portion and second communication portion, and processing portion links to each other with human-computer interaction portion, and processing portion still links to each other with second communication portion, and second communication portion communicates with first communication portion. Therefore, the utility model discloses air conditioning system through with the integrated setting of processing part in control terminal, can no longer set up processing part in the indoor set, and then reduces automatically controlled components and parts and the electrical contact in the indoor set, effectively avoids the appearance of automatically controlled phenomenon of striking sparks, potential safety hazard when reducing the flammable refrigerant of use.
Based on above-mentioned embodiment's air conditioning system, the embodiment of the utility model provides an indoor unit has still been provided.
Fig. 4 is a block diagram of an indoor unit according to an embodiment of the present invention. As shown in fig. 4, an indoor unit 1 according to an embodiment of the present invention includes an operating member 11, a first communication unit 12, and a power supply unit 10.
Wherein, the first communication part 12 is connected with the action component 11 to control the action component 11, and the first communication part 12 communicates with the control terminal 2; the power supply section 10 is connected to the operating member 11 and the first communication section 12 to supply power to the operating member 11 and the first communication section 12.
The control terminal 2 may be an air conditioner remote controller, and the control terminal 2 may include a processing unit, such as an air conditioner electric control board, for controlling the operating member 11 in the indoor unit 1.
It can be understood that the user can send the control signal through the control terminal 2, the first communication part 12 receives the control signal sent by the control terminal 2 through communication with the control terminal 2 and sends the control signal to the corresponding action part 11, the action part 11 sends the status signal to the first communication part 12 after finishing the action according to the control signal, and the first communication part 12 receives the status signal sent by the action part 11 and sends the status signal to the control terminal 2 through communication with the control terminal 2.
Therefore, a processing part such as an air conditioner electric control board can not be arranged in the indoor unit 1, electric control components and electric contacts in the indoor unit 1 are reduced, the electric control ignition phenomenon is effectively avoided, and potential safety hazards when combustible refrigerants are used are reduced.
The first communication unit 12 communicates with the control terminal 2 by a WiFi communication method or a bluetooth communication method.
Further, as shown in fig. 5, the operating member 11 includes a strong electric operating member 110 and a weak electric operating member 111, and the power supply portion 10 has a strong electric power supply terminal 10a and a weak electric power supply terminal 10b, wherein the strong electric power supply terminal 10a is connected to the strong electric operating member 110, the weak electric power supply terminal 10b is connected to the power supply input terminal 12a of the first communication portion 12, and the weak electric power supply terminal 10b is further connected to the weak electric operating member 111. The strong electric operating member 110 includes an indoor fan and a heater, and the weak electric operating member 111 includes a stepping motor and a sensor.
As one example, the power supply part 10 may be a DC-DC converter or an AC-DC converter.
The strong electricity may be electricity in an electric power system, and is used to drive a large-power electric device, that is, electricity output from the power supply unit 10 through the strong electricity supply terminal 10a may supply electricity to the strong electricity operating member 110 in the indoor unit 1, such as an indoor fan and a heater. The weak current may refer to a current and a voltage required for transmitting a signal for signal processing, that is, the power outputted from the power supply part 10 through the weak current power supply terminal 10b may supply power to the weak current action part 111 such as a stepping motor and a sensor in the indoor unit 1, and may also supply power to the first communication part 12.
Further, as shown in fig. 6, the operation member 11 includes a strong electric operation member 110 and a weak electric operation member 111, the power supply portion 10 has a strong electric power supply terminal 10a and a weak electric power supply terminal 10b, the first communication portion 12 has a power supply module 120, wherein the strong electric power supply terminal 10a is connected to the strong electric operation member 110, and the weak electric power supply terminal 10b is connected to the power supply input terminal 12a of the first communication portion 12; the input terminal 120a of the power module 120 of the first communication unit 12 is connected to the power input terminal 12a of the first communication unit 12, and the output terminal 120b of the power module 120 of the first communication unit 12 is connected to the weak current operating member 111.
It can be understood that the power supply part 10 can supply power to the strong electric action components 110 in the indoor unit 1, such as the indoor fan and the heater, through the electricity output by the strong electric power supply terminal 10a, the power supply part 10 can supply power to the first communication part 12 in the indoor unit 1, through the electricity output by the weak electric power supply terminal 10b, and meanwhile, the power supply part 10 can supply power to the weak electric action components 111, such as the stepping motor and the sensor, after the electricity output by the weak electric power supply terminal 10b is converted through the power supply module 120 in the first communication part 12.
That is, the weak current power supply terminal 10b of the power supply unit 10 may directly supply power to the weak current operation part 111, or may supply power to the weak current operation part 111 after being converted by the power supply module 120 in the first communication unit 12.
Further, the first communication unit 12 is configured to receive the status signal transmitted by the operating member 11 and transmit the status signal to the control terminal 2 by communicating with the control terminal 2; the first communication unit 12 is also configured to receive a control signal transmitted by the control terminal 2 and transmit the control signal to the corresponding operating component 11.
It can be understood that the user can send the control signal through the control terminal 2, the first communication part 12 receives the control signal sent by the control terminal 2 through communication with the control terminal 2 and sends the control signal to the corresponding action part 11, the action part 11 sends the status signal to the first communication part 12 after finishing the action according to the control signal, and the first communication part 12 receives the status signal sent by the action part 11 and sends the status signal to the control terminal 2 through communication with the control terminal 2.
For example, when a user can input a control command such as a "temperature rise" control command through the operation member 200, the operation member 200 sends the "temperature rise" control command input by the user to the processing unit 21, the processing unit 21 processes the "temperature rise" control command to generate a control signal and sends the control signal to the second communication unit 22, the second communication unit 22 receives the control signal sent by the processing unit 21 and sends the control signal to the indoor fan by communicating with the first communication unit 12, the indoor fan completes an action such as turning on according to the control signal and sends a status signal such as an on status to the first communication unit 12, the first communication unit 12 receives the status signal sent by the indoor fan and sends the status signal to the processing unit 21 by communicating with the second communication unit 22, the processing unit 21 processes the received status signal, the control display component 201 displays to prompt the user that the indoor fan is completely turned on.
The user can send a 'wind swing' control signal through the control terminal, the first communication part 12 receives the 'wind swing' control signal sent by the control terminal 2 through communicating with the control terminal 2 and sends the 'wind swing' control signal to the stepping motor, the stepping motor sends a state signal to the first communication part 12 in an open state after completing actions such as opening according to the 'wind swing' control signal, and the first communication part 12 receives the state signal sent by the stepping motor and sends the state signal to the control terminal 2 through communicating with the control terminal 2 so as to prompt the user that the actions are completed.
Therefore, by not arranging a processing part such as an air conditioner electric control board in the indoor unit 1, electric control components and electric contacts in the indoor unit 1 can be reduced, the electric control ignition phenomenon is effectively avoided, and the potential safety hazard when combustible refrigerants are used is reduced.
In summary, according to the present invention, the first communication portion is connected to the operation member to control the operation member, the first communication portion is communicated with the control terminal, and the power supply portion is connected to the operation member and the first communication portion to supply power to the operation member and the first communication portion. From this, through the utility model discloses no longer set up the processing part in the indoor set, and then the automatically controlled components and parts and the electrical contact in the reducible indoor set effectively avoid the appearance of automatically controlled phenomenon of striking sparks, potential safety hazard when reducing the flammable refrigerant of use.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.