阅读说明：本技术 一种冷藏陈列柜及其控制方法 (Refrigerated display cabinet and control method thereof ) 是由 谢恒� 张海城 么宇 路培鑫 吴明国 于 2021-09-24 设计创作，主要内容包括：本发明涉及一种冷藏陈列柜及其控制方法,该冷藏陈列柜通过在每层水平搁物架前设置人体红外检测装置及在每层水平搁物架的末端设置伸缩帘,使得任一人体红外检测装置检测到人体靠近信号时,控制相应的伸缩帘缩回,否则,控制相应的伸缩帘伸出,从而阻断相应层水平搁物架内的冷量流失,相比现有技术,只有在检测到消费者商品拿取行为时,才开启伸缩帘,这样能在没有消费者拿取商品的情况下减少冷量的损失,从而减少了冷藏陈列柜的耗电量,用户体验度好、满意度高。(The invention relates to a refrigerated display cabinet and a control method thereof, the refrigerated display cabinet is provided with a human body infrared detection device in front of each layer of horizontal rack and a telescopic curtain at the tail end of each layer of horizontal rack, so that when any human body infrared detection device detects a human body approach signal, the corresponding telescopic curtain is controlled to retract, otherwise, the corresponding telescopic curtain is controlled to extend, thereby blocking the loss of cold energy in the corresponding layer of horizontal rack.)

1. A refrigerated display case comprising:

at least one human body infrared detection device arranged in front of each layer of horizontal rack;

at least one retractable curtain arranged at the tail end of each layer of horizontal rack;

and the controller is used for controlling the corresponding telescopic curtain to retract when any human body infrared detection device detects a human body approaching signal, or controlling the corresponding telescopic curtain to extend out to block the cold loss in the horizontal rack of the corresponding layer.

2. A refrigerated display case of claim 1,

the retractable curtain is arranged at the tail end of the back of each layer of horizontal rack and used for blocking the cold energy loss in the next layer of horizontal rack when the retractable curtain extends out; and/or the presence of a gas in the gas,

the retractable curtain is arranged at the tail end of the front face of each layer of horizontal rack and used for blocking the cold loss in the current layer of horizontal rack when the retractable curtain extends out.

3. A refrigerated display case as recited in claim 1 further comprising:

the inner air duct outputs main cold air to the air curtain opening and forms a cold air curtain downwards at the air curtain opening;

at least one air duct air port communicated with the inner air duct;

the air duct air opening is formed in the back plate of the horizontal rack.

4. A refrigerated display case as recited in claim 3 further comprising:

the evaporator and the fan are arranged in the inner air duct and used for forming a cold air flow circulation loop;

the electronic expansion valve is arranged at an inlet of the evaporator pipeline;

the controller is further used for controlling the opening degree of the electronic expansion valve according to the working state and the opening number of the telescopic curtains so as to control the flow of the refrigerant flowing through the evaporator.

5. A refrigerated display case as claimed in any one of claims 1 to 4 further comprising:

at least one weight sensor arranged on each layer of horizontal rack;

the controller is also used for calculating the commodity change information on each layer of horizontal rack according to the weight information detected by the weight sensor and the human body approach signal information detected by the human body infrared detection device, and sending the calculation result to the background controller.

6. A method of controlling a refrigerated display case comprising:

when any human body infrared detection device detects a human body approach signal, the corresponding retractable curtain is controlled to retract, otherwise, the corresponding retractable curtain is controlled to extend out, so that the cold loss in the horizontal rack of the corresponding layer is blocked;

at least one human body infrared detection device is arranged in front of each layer of horizontal rack;

at least one telescopic curtain is arranged at the tail end of each layer of horizontal rack.

7. The method of claim 6, further comprising:

controlling the opening of the electronic expansion valve according to the working state and the opening number of the telescopic curtains so as to control the flow of the refrigerant flowing through the evaporator;

the electronic expansion valve is arranged at an inlet of the evaporator pipeline;

the evaporator and the fan are arranged in the inner air duct and are used for forming a cold air flow circulation loop.

8. The method of claim 7, wherein the controlling an opening degree of the electronic expansion valve comprises:

if the telescopic curtains are all in the extending state, the refrigeration load of the refrigerated display cabinet is judged to be small at the moment, and the opening degree of the electronic expansion valve is adjusted in a small range; and/or the presence of a gas in the gas,

and if all the telescopic curtains are in a retracted state, judging that the refrigeration load of the refrigerated display cabinet is increased at the moment, and greatly adjusting the opening degree of the electronic expansion valve, wherein the opening degree of the electronic expansion valve is in direct proportion to the opening number of the telescopic curtains.

9. The method of any one of claims 1 to 6, further comprising:

calculating the change quantity of the commodities on each layer of horizontal rack according to the weight information detected by the weight sensor and the human body approach signal information detected by the human body infrared detection device, and sending the calculation result to the background controller;

wherein, the weight sensor is at least one and is arranged on each layer of horizontal rack.

10. The method of claim 9, wherein said calculating a number of product changes per level of horizontal racks comprises:

if the human body infrared detection device on any horizontal rack detects a human body approach signal once and the corresponding weight sensor detects that the weight of the commodities on the horizontal rack is reduced, reducing the total quantity of the commodities corresponding to the horizontal rack by one;

if the human body infrared detection device on any horizontal rack detects a human body approach signal once and the corresponding weight sensor detects that the weight of the commodities on the horizontal rack is increased, the total quantity of the commodities corresponding to the horizontal rack is increased by one.

Technical Field

The invention relates to the technical field of intelligent electric appliances, in particular to a refrigerated display cabinet and a control method thereof.

Background

The food refrigerated display cabinet is used as a tail end device in a food cold chain, and plays an important role in ensuring the quality and safety of food. The food refrigerated display cabinet has various types and styles, wherein the open type food refrigerated display cabinet not only can provide proper refrigerated temperature for food, but also can display food, beautify shopping environment and stimulate consumption, and has become an indispensable device in a supermarket after years of development.

The existing open type food refrigeration method of the vertical refrigeration display cabinet has the advantages of generally higher energy consumption and less energy-saving design consideration.

Disclosure of Invention

In view of the above, the present invention provides a refrigerated display cabinet and a control method thereof, so as to solve the problem of high energy consumption of the open type food refrigeration method of the refrigerated display cabinet in the prior art.

According to a first aspect of embodiments of the present invention there is provided a refrigerated display case comprising:

at least one human body infrared detection device arranged in front of each layer of horizontal rack;

at least one retractable curtain arranged at the tail end of each layer of horizontal rack;

and the controller is used for controlling the corresponding telescopic curtain to retract when any human body infrared detection device detects a human body approaching signal, or controlling the corresponding telescopic curtain to extend out to block the cold loss in the horizontal rack of the corresponding layer.

Preferably, the retractable curtain is arranged at the tail end of the back surface of each layer of horizontal rack and used for blocking the loss of cold energy in the next layer of horizontal rack when the retractable curtain is extended out; and/or the presence of a gas in the gas,

the retractable curtain is arranged at the tail end of the front face of each layer of horizontal rack and used for blocking the cold loss in the current layer of horizontal rack when the retractable curtain extends out.

Preferably, the refrigerated display case further comprises:

the inner air duct outputs main cold air to the air curtain opening and forms a cold air curtain downwards at the air curtain opening;

at least one air duct air port communicated with the inner air duct;

the air duct air opening is formed in the back plate of the horizontal rack.

Preferably, the refrigerated display case further comprises:

the evaporator and the fan are arranged in the inner air duct and used for forming a cold air flow circulation loop;

the electronic expansion valve is arranged at an inlet of the evaporator pipeline;

the controller is further used for controlling the opening degree of the electronic expansion valve according to the working state and the opening number of the telescopic curtains so as to control the flow of the refrigerant flowing through the evaporator.

Preferably, the refrigerated display case further comprises:

at least one weight sensor arranged on each layer of horizontal rack;

the controller is also used for calculating the commodity change information on each layer of horizontal rack according to the weight information detected by the weight sensor and the human body approach signal information detected by the human body infrared detection device, and sending the calculation result to the background controller.

According to a second aspect of an embodiment of the present invention, there is provided a method of controlling a refrigerated display case, comprising:

when any human body infrared detection device detects a human body approach signal, the corresponding retractable curtain is controlled to retract, otherwise, the corresponding retractable curtain is controlled to extend out, so that the cold loss in the horizontal rack of the corresponding layer is blocked;

at least one human body infrared detection device is arranged in front of each layer of horizontal rack;

at least one telescopic curtain is arranged at the tail end of each layer of horizontal rack.

Preferably, the method further comprises:

controlling the opening of the electronic expansion valve according to the working state and the opening number of the telescopic curtains so as to control the flow of the refrigerant flowing through the evaporator;

the electronic expansion valve is arranged at an inlet of the evaporator pipeline;

the evaporator and the fan are arranged in the inner air duct and are used for forming a cold air flow circulation loop.

Preferably, the controlling the opening degree of the electronic expansion valve includes:

if the telescopic curtains are all in the extending state, the refrigeration load of the refrigerated display cabinet is judged to be small at the moment, and the opening degree of the electronic expansion valve is adjusted in a small range; and/or the presence of a gas in the gas,

and if all the telescopic curtains are in a retracted state, judging that the refrigeration load of the refrigerated display cabinet is increased at the moment, and greatly adjusting the opening degree of the electronic expansion valve, wherein the opening degree of the electronic expansion valve is in direct proportion to the opening number of the telescopic curtains.

Preferably, the method further comprises:

calculating the change quantity of the commodities on each layer of horizontal rack according to the weight information detected by the weight sensor and the human body approach signal information detected by the human body infrared detection device, and sending the calculation result to the background controller;

wherein, the weight sensor is at least one and is arranged on each layer of horizontal rack.

Preferably, the calculating the number of the commodity change on each layer of horizontal rack comprises:

if the human body infrared detection device on any horizontal rack detects a human body approach signal once and the corresponding weight sensor detects that the weight of the commodities on the horizontal rack is reduced, reducing the total quantity of the commodities corresponding to the horizontal rack by one;

if the human body infrared detection device on any horizontal rack detects a human body approach signal once and the corresponding weight sensor detects that the weight of the commodities on the horizontal rack is increased, the total quantity of the commodities corresponding to the horizontal rack is increased by one.

The technical scheme provided by the embodiment of the invention can have the following beneficial effects:

the human body infrared detection devices are arranged in front of each layer of horizontal rack, and the telescopic curtains are arranged at the tail ends of each layer of horizontal rack, so that when any human body infrared detection device detects a human body approaching signal, the corresponding telescopic curtain is controlled to retract, otherwise, the corresponding telescopic curtain is controlled to extend out, and therefore cold energy loss in the corresponding layer of horizontal rack is blocked.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic illustration of a refrigerated display case shown in accordance with an exemplary embodiment;

figure 2 is a flow chart illustrating a method of controlling a refrigerated display case according to one exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

Example one

Fig. 1 is a schematic diagram illustrating the construction of a refrigerated display case, as shown in fig. 1, according to an exemplary embodiment, including:

at least one human body infrared detection device 2 arranged in front of each layer of horizontal rack 1;

at least one retractable curtain 3 arranged at the tail end of each layer of horizontal rack 1;

and the controller (not shown in the drawing) is used for controlling the corresponding retractable curtain 3 to retract when any human body infrared detection device 2 detects a human body approach signal, and otherwise, controlling the corresponding retractable curtain 3 to extend so as to block the cold loss in the horizontal rack 1 of the corresponding floor.

It should be noted that the refrigerated display case includes, but is not limited to: three-door split vertical showcases, split showcases with any number of doors, portable vertical showcases and the like.

The human body infrared detection device can be a human body infrared pyroelectric induction switch, a human body infrared pyroelectric infrared sensor and the like in specific practice.

Because the human body infrared detection device is arranged in front of each layer of horizontal rack, when the human body infrared detection device detects that a human body approaches, the human body infrared detection device can judge that a person needs to take the commodity from the current horizontal rack, and at the moment, the corresponding retractable curtain can be controlled to retract, so that the user can take the corresponding commodity conveniently. And after the human body approach signal is not detected, the human body is judged to leave, and at the moment, the corresponding telescopic curtain is controlled to extend out so as to block the cold energy loss in the horizontal rack of the corresponding layer.

In view of the reliability and cost of the refrigerated display case provided by the present embodiment, in practical practice, a human body infrared detection device may be provided in front of the horizontal shelf of one floor, and a retractable curtain may be provided at the end of the horizontal shelf of one floor.

In particular practice, the controller includes, but is not limited to: singlechip, microprocessor, PLC controller, DSP controller, FPGA controller etc..

It can be understood that, according to the technical scheme provided by this embodiment, the human body infrared detection device is arranged in front of each layer of horizontal rack, and the retractable curtain is arranged at the tail end of each layer of horizontal rack, so that when any human body infrared detection device detects a human body approach signal, the corresponding retractable curtain is controlled to retract, otherwise, the corresponding retractable curtain is controlled to extend, and thereby the loss of the cooling capacity in the corresponding layer of horizontal rack is blocked.

In a specific practice, the retractable curtain 3 is arranged at the tail end of the back surface of each layer of horizontal rack 1 and is used for blocking the loss of cold energy in the next layer of horizontal rack 1 when being extended out; and/or the presence of a gas in the gas,

the retractable curtain 3 is arranged at the tail end of the front surface of each layer of horizontal rack 1 and used for blocking the cold loss in the current layer of horizontal rack 1 when extending out.

It can be understood that the existing refrigerated display cabinets are basically three-sided display cabinets, and when the retractable curtain is extended out, a closed space is formed between the horizontal shelf at the upper layer and the horizontal shelf at the current layer, so that the loss of cold energy in the horizontal shelf at the current layer can be effectively prevented.

In particular practice, the refrigerated display case further comprises:

the inner air duct 6 outputs main cold air to the air curtain opening and forms a cold air curtain downwards at the air curtain opening;

at least one air duct air port 5 communicated with the inner air duct 6;

the air duct air opening 5 is formed in the back plate of the horizontal rack 1.

It should be noted that, since the structure of the outer air duct 4 in fig. 1 is not improved in this embodiment, the working principle thereof is not described again.

It can be understood that the air outlets of the air ducts are distributed in each layer of horizontal rack, so that the temperature of the goods on each layer of horizontal rack is ensured, the temperature in the refrigerated display cabinet is more uniform, the energy consumption is low, the cost is low, and the refrigerating and fresh-keeping effects of the refrigerated display cabinet are optimized.

It can be understood that when the common display cabinet operates normally, the cold air blown out from the air duct is cooled from top to bottom, the temperature difference of the whole cabinet is large, and the cold energy of each layer of goods shelves is easy to run off from the front ends of the goods shelves. In the refrigerated display cabinet provided by the embodiment, the cold air outlets are distributed on the back plate of each layer of horizontal racks, and the front surface of the lower layer of horizontal racks is covered when the retractable curtain of the upper layer of horizontal racks extends out, so that the loss of cold energy can be effectively prevented, and the overall temperature of the refrigerated display cabinet is ensured.

In particular practice, the refrigerated display case further comprises:

an evaporator 7 and a fan (not shown in the drawings) disposed in the inner duct 6 for forming a cold air circulation loop;

an electronic expansion valve (not shown in the drawings) provided at the inlet of the evaporator 7 line;

the controller is further configured to control the opening of the electronic expansion valve according to the working state and the opening number of the retractable curtains 3, so as to control the flow rate of the refrigerant flowing through the evaporator 7.

In a specific practice, the controlling the opening degree of the electronic expansion valve includes:

if the telescopic curtains are all in the extending state, the refrigeration load of the refrigerated display cabinet is judged to be small at the moment, and the opening degree of the electronic expansion valve is adjusted in a small range; and/or the presence of a gas in the gas,

and if all the telescopic curtains are in a retracted state, judging that the refrigeration load of the refrigerated display cabinet is increased at the moment, and greatly adjusting the opening degree of the electronic expansion valve, wherein the opening degree of the electronic expansion valve is in direct proportion to the opening number of the telescopic curtains.

It can be understood that, the technical scheme that this embodiment provided adjusts the aperture of electronic expansion valve through the operating condition that detects the retractable curtain to keep the temperature of refrigerated display case stable, prevent the emergence of the sudden temperature rise or the sudden drop problem that leads to because the consumer frequently opens the cabinet door.

In particular practice, the refrigerated display case further comprises:

at least one weight sensor (not shown in the drawings) provided on each level of horizontal racks 1;

the controller is also used for calculating the commodity change information on each layer of horizontal rack according to the weight information detected by the weight sensor and the human body approach signal information detected by the human body infrared detection device, and sending the calculation result to the background controller.

In a specific practice, said calculating the number of article variations on each level of horizontal racks comprises:

if the human body infrared detection device on any horizontal rack detects a human body approach signal once and the corresponding weight sensor detects that the weight of the commodities on the horizontal rack is reduced, reducing the total quantity of the commodities corresponding to the horizontal rack by one;

if the human body infrared detection device on any horizontal rack detects a human body approach signal once and the corresponding weight sensor detects that the weight of the commodities on the horizontal rack is increased, the total quantity of the commodities corresponding to the horizontal rack is increased by one.

It can be understood that, according to the technical scheme provided by this embodiment, the commodity change information on each layer of horizontal rack can be counted according to the weight information detected by the weight sensor and the human body approach signal information detected by the human body infrared detection device, so that the commodity feeding and loading reference is provided for the staff, the function integration level is high, and the user experience level is good.

Example two

Fig. 2 is a flow chart illustrating a method of controlling a refrigerated display case, as shown in fig. 2, in accordance with an exemplary embodiment, the method including:

step S1, judging whether the human body infrared detection device detects a human body approach signal within a preset time length;

step S2, if the human body infrared detection device detects a human body approach signal, controlling the corresponding retractable curtain to retract;

step S3, if the human body infrared detection device does not detect the human body approach signal, the corresponding retractable curtain is controlled to extend out so as to block the cold loss in the horizontal rack of the corresponding layer;

at least one human body infrared detection device is arranged in front of each layer of horizontal rack;

at least one telescopic curtain is arranged at the tail end of each layer of horizontal rack.

It should be noted that the refrigerated display case includes, but is not limited to: three-door split vertical showcases, split showcases with any number of doors, portable vertical showcases and the like.

In a specific practice, every preset time period may be set to determine whether the human body infrared detection device detects a human body approach signal, for example, the detection is set to be performed every 3 seconds, every one second, and the like. The preset time length is set according to user requirements or historical experience values.

Because the human body infrared detection device is arranged in front of each layer of horizontal rack, when the human body infrared detection device detects that a human body approaches, the human body infrared detection device can judge that a person needs to take the commodity from the current horizontal rack, and at the moment, the corresponding retractable curtain can be controlled to retract, so that the user can take the corresponding commodity conveniently. And after the human body approach signal is not detected, the human body is judged to leave, and at the moment, the corresponding telescopic curtain is controlled to extend out so as to block the cold energy loss in the horizontal rack of the corresponding layer.

It can be understood that, according to the technical scheme provided by this embodiment, the human body infrared detection device is arranged in front of each layer of horizontal rack, and the retractable curtain is arranged at the tail end of each layer of horizontal rack, so that when any human body infrared detection device detects a human body approach signal, the corresponding retractable curtain is controlled to retract, otherwise, the corresponding retractable curtain is controlled to extend, and thereby the loss of the cooling capacity in the corresponding layer of horizontal rack is blocked.

Preferably, the method further comprises:

controlling the opening of the electronic expansion valve according to the working state and the opening number of the telescopic curtains so as to control the flow of the refrigerant flowing through the evaporator;

the electronic expansion valve is arranged at an inlet of the evaporator pipeline;

the evaporator and the fan are arranged in the inner air duct and are used for forming a cold air flow circulation loop.

It can be understood that when the telescopic curtain is completely closed, the load of the showcase is small, the load variation is small, and the opening degree of the electronic expansion valve is adjusted in a small range, and the adjustment precision can be increased. When the telescopic curtain is detected to be opened, the load is increased, and the electronic expansion valve should have an accurate control strategy to cope with sudden change of the load, namely, the opening degree should be rapidly increased to increase the refrigerant flow. Further, as the opening number of the retractable curtains increases, the load increases accordingly, and the opening variation of the electronic expansion valve should also increase relatively.

In a specific practice, the controlling the opening degree of the electronic expansion valve includes:

if the telescopic curtains are all in the extending state, the refrigeration load of the refrigerated display cabinet is judged to be small at the moment, and the opening degree of the electronic expansion valve is adjusted in a small range, which specifically comprises the following steps:

controlling the opening degree variation delta u of the electronic expansion valve in the k sampling period_kIs (unit:%):

wherein, K_pIs a proportionality coefficient, T_iTo integrate the time constant, T_dIs a differential time constant, T is a sampling period, e_kThe superheat deviation at the k-th sampling period.

If all the retractable curtains are in a retracted state, the refrigeration load of the refrigerated display cabinet is judged to be increased, the opening degree of the electronic expansion valve is greatly adjusted, and the opening degree of the electronic expansion valve is in direct proportion to the opening number of the retractable curtains, and the method specifically comprises the following steps:

Δu_n＝u_k+2n

during the operation, when the opening degree of the electronic expansion valve is adjusted, if the adjusted opening degree is lower than the operation opening degree minimum value, the opening degree is adjusted according to the operation opening degree minimum value and is not lower than the operation opening degree minimum value. And if the absolute value of the opening variation required to be controlled is calculated according to the formula and is larger than the amplitude limiting adjustment opening, adjusting according to the amplitude limiting adjustment opening.

It can be understood that, the technical scheme that this embodiment provided adjusts the aperture of electronic expansion valve through the operating condition that detects the retractable curtain to keep the temperature of refrigerated display case stable, prevent the emergence of the sudden temperature rise or the sudden drop problem that leads to because the consumer frequently opens the cabinet door.

Preferably, the method further comprises:

calculating the change quantity of the commodities on each layer of horizontal rack according to the weight information detected by the weight sensor and the human body approach signal information detected by the human body infrared detection device, and sending the calculation result to the background controller;

wherein, the weight sensor is at least one and is arranged on each layer of horizontal rack.

In a specific practice, said calculating the number of article variations on each level of horizontal racks comprises:

if the human body infrared detection device on any horizontal rack detects a human body approach signal once and the corresponding weight sensor detects that the weight of the commodities on the horizontal rack is reduced, reducing the total quantity of the commodities corresponding to the horizontal rack by one;

if the human body infrared detection device on any horizontal rack detects a human body approach signal once and the corresponding weight sensor detects that the weight of the commodities on the horizontal rack is increased, the total quantity of the commodities corresponding to the horizontal rack is increased by one.

It can be understood that when the commodity count exceeds the total quantity of the previously set commodities, the commodity count is fed back to the background controller to prompt that the current commodities are sold out and need to be restocked; and the staff inputs a commodity number again after seeing the replenishment information of the background controller and replenishing the replenishment.

It can be understood that, according to the technical scheme provided by this embodiment, the commodity change information on each layer of horizontal rack can be counted according to the weight information detected by the weight sensor and the human body approach signal information detected by the human body infrared detection device, so that the commodity feeding and loading reference is provided for the staff, the function integration level is high, and the user experience level is good.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.

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 specific logical functions or steps of the 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 present invention.

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. For example, 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, functional units 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.

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 do not necessarily 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.

Although embodiments of the present invention have been shown and described above, 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 within the scope of the present invention.