阅读说明：本技术 压缩机延迟启动控制方法和装置、冰箱 (Delayed starting control method and device for compressor and refrigerator ) 是由 徐阳 李琦 辛海亚 甄梦想 王飞 于 2021-09-06 设计创作，主要内容包括：本发明提供了一种压缩机延迟启动控制方法和装置、冰箱,其中,该方法包括：获取目标压缩机的延迟启动影响因子；根据所述延迟启动影响因子,确定所述目标压缩机对应的启动压差限值；获取目标压缩机的实时压差,在实时压差达到所述启动压差限值的情况下,启动所述目标压缩机。通过上述方案达到了避免压缩机启动的跳机问题和降低冰箱间室的温度波动的技术效果。(The invention provides a delayed start control method and device for a compressor and a refrigerator, wherein the method comprises the following steps: obtaining a delayed start influence factor of a target compressor; determining a starting pressure difference limit value corresponding to the target compressor according to the delayed starting influence factor; and acquiring real-time pressure difference of the target compressor, and starting the target compressor under the condition that the real-time pressure difference reaches the starting pressure difference limit value. The technical effects of avoiding the problem of trip of the compressor during starting and reducing the temperature fluctuation of the refrigerator compartment are achieved through the scheme.)

1. A delayed start control method for a compressor, comprising:

obtaining a delayed start influence factor of a target compressor;

determining a starting pressure difference limit value corresponding to the target compressor according to the delayed starting influence factor;

and acquiring the real-time pressure difference of the target compressor, and starting the target compressor under the condition that the real-time pressure difference reaches the starting pressure difference limit value.

2. The method of claim 1, wherein the delayed initiation impact factor comprises at least one of: ambient temperature, compressor shell temperature, compressor starting speed.

3. The method of claim 2, wherein determining a starting pressure differential limit for the target compressor based on the delayed start impact factor comprises:

calling a mapping relation established in advance;

and searching a starting pressure difference limit value corresponding to the delayed starting influence factor according to the mapping relation.

4. The method of claim 3, wherein the mapping relationship is established according to the following rule:

the higher the ambient temperature is, the lower the corresponding starting pressure difference limit value is;

the higher the temperature of the compressor shell is, the lower the corresponding starting pressure difference limit value is;

the higher the starting speed of the compressor, the lower the corresponding starting differential pressure limit.

5. The method of claim 1, wherein obtaining a real-time pressure differential of the target compressor comprises:

measuring system high pressure and system low pressure;

and taking the difference value of the high-pressure of the system and the low-pressure of the system as the real-time pressure difference of the target compressor.

6. The method of claim 5, wherein measuring a system high pressure and a system low pressure comprises:

acquiring the high-pressure of the system through a high-pressure sensor arranged between the drying filter and the condensation preventing pipe;

the system low pressure is obtained by a low pressure sensor arranged between the evaporator and the capillary tube.

7. A delayed start control apparatus for a compressor, comprising:

the acquisition module is used for acquiring a delayed start influence factor of the target compressor;

the determining module is used for determining a starting pressure difference limit value corresponding to the target compressor according to the delayed starting influence factor;

and the starting module is used for acquiring the real-time pressure difference of the target compressor and starting the target compressor under the condition that the real-time pressure difference reaches the starting pressure difference limit value.

8. A refrigerator, comprising: the delayed start control apparatus for a compressor of claim 7.

9. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 6 when executing the computer program.

10. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method of any of claims 1 to 6.

Technical Field

The invention relates to the technical field of household equipment, in particular to a delayed start control method and device for a compressor and a refrigerator.

Background

The delayed starting time (the shortest time of the last stop of the compression starting distance) of the existing compressor is 8min, the delayed starting is set to balance the system pressure so as to avoid the phenomenon that the starting torque of the compressor is smaller than the system resistance to cause the starting and tripping of the compressor, but the temperature fluctuation of the refrigerator room is too large due to the overlong set delayed starting time, the system pressure difference is too large due to the overlong set delayed starting time, and the starting torque is insufficient to cause the tripping of the compressor.

Disclosure of Invention

The embodiment of the invention provides a delayed start control method and device for a compressor and a refrigerator, and aims to solve the problems of overlarge temperature fluctuation of a refrigerator compartment and machine tripping of the compressor caused by fixedly setting delayed start time in the prior art.

In one aspect, a delayed start control method for a compressor is provided, including:

obtaining a delayed start influence factor of a target compressor;

determining a starting pressure difference limit value corresponding to the target compressor according to the delayed starting influence factor;

and acquiring real-time pressure difference of the target compressor, and starting the target compressor under the condition that the real-time pressure difference reaches the starting pressure difference limit value.

In one embodiment, the delayed initiation influencing factor comprises at least one of: ambient temperature, compressor shell temperature, compressor starting speed.

In one embodiment, determining a starting pressure difference limit corresponding to the target compressor based on the delayed starting impact factor includes:

calling a mapping relation established in advance;

and searching a starting pressure difference limit value corresponding to the delayed starting influence factor according to the mapping relation.

In one embodiment, the mapping relationship is established according to the following rules:

the higher the ambient temperature is, the lower the starting differential pressure limit is;

the higher the temperature of the shell of the compressor is, the lower the starting pressure difference limit value is;

the higher the compressor starting speed, the lower the starting pressure differential limit.

In one embodiment, obtaining a real-time pressure differential for a target compressor comprises:

measuring system high pressure and system low pressure;

and taking the difference value of the high-pressure of the system and the low-pressure of the system as the real-time pressure difference of the target compressor.

In one embodiment, measuring a system high pressure and a system low pressure comprises:

acquiring system high-pressure through a high-pressure sensor arranged between the drying filter and the condensation preventing pipe;

the system low pressure is obtained by a low pressure sensor arranged between the evaporator and the capillary tube.

In another aspect, there is provided a delayed start control apparatus of a compressor, including:

the acquisition module is used for acquiring a delayed start influence factor of the target compressor;

the determining module is used for determining a starting pressure difference limit value corresponding to the target compressor according to the delayed starting influence factor;

and the starting module is used for acquiring the real-time pressure difference of the target compressor and starting the target compressor under the condition that the real-time pressure difference reaches the starting pressure difference limit value.

In still another aspect, there is provided a refrigerator including: the delayed starting control device of the compressor.

In yet another aspect, a network device is provided, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the above method when executing the computer program.

In a further aspect, a non-transitory computer-readable storage medium is provided, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the above-mentioned method.

In the embodiment, a plurality of starting pressure difference limit values are set according to the delayed starting influence factors, and whether the compressor is started or not is determined through the real-time pressure difference of the compressor, so that the problems of overlarge temperature fluctuation of the refrigerator chamber and compressor trip caused by the fact that the delayed starting time is fixedly set in the prior art can be solved, and the technical effects of avoiding the trip problem of the compressor starting and reducing the temperature fluctuation of the refrigerator chamber are achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a method flowchart of a delayed start control method of a compressor according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a refrigeration system for a refrigerator according to an embodiment of the present invention;

fig. 3 is a block diagram illustrating a delayed start control apparatus for a compressor according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

The problem that starting and tripping of the compressor cannot be thoroughly solved due to the fact that the starting time of the compressor is fixed, the problem that temperature fluctuation of the refrigerator room is too large due to the fact that the set fixed delay starting time is too long is solved, and the problem that system pressure difference is too large and starting fails when the compressor is started due to the fact that the set fixed delay starting time is too short is solved. In this embodiment, a delayed start control method for a compressor is provided, as shown in fig. 1, and may include the following steps:

step 101: obtaining a delayed start influence factor of a target compressor;

step 102: determining a starting pressure difference limit value corresponding to the target compressor according to the delayed starting influence factor;

step 103: and acquiring real-time pressure difference of the target compressor, and starting the target compressor under the condition that the real-time pressure difference reaches the starting pressure difference limit value.

In the above embodiment, a plurality of starting pressure difference limit values are set according to the delayed starting influence factors, and whether the compressor is started or not is determined through the real-time pressure difference of the compressor, so that the problems of overlarge temperature fluctuation of the refrigerator chamber and compressor trip caused by the fixed setting of the delayed starting time in the prior art can be solved, and the technical effects of avoiding the trip problem of the compressor starting and reducing the temperature fluctuation of the refrigerator chamber are achieved.

Wherein, the delay start influencing factor may include at least one of the following: ambient temperature, compressor shell temperature, compressor starting speed. Namely, the delayed starting time of the compressor can be determined by a set starting differential pressure limit value, and the compressor is started when the differential pressure reaches the starting differential pressure limit value and a refrigerating request is made to a compartment; and multiple groups of starting differential pressure limit values are set according to the environmental temperature, the shell temperature of the compressor and the starting rotating speed of the compressor so as to adapt to the optimal starting time of the compressor under different working conditions, thereby prolonging the service life of the compressor and reducing the fluctuation range of the compartment temperature.

When the method is implemented, a mapping relation (for example, the mapping relation is set to be in the form of a comparison table) can be established in advance, and when the method is executed, only the comparison table needs to be searched, so that the corresponding starting pressure difference limit value can be obtained. That is, determining the starting pressure difference limit corresponding to the target compressor according to the delayed starting impact factor may include: calling a pre-established mapping relation, wherein the mapping relation is the mapping relation between the environment temperature, the compressor shell temperature and the compressor starting rotating speed and the starting pressure difference limit value; and searching a starting pressure difference limit value corresponding to the delayed starting influence factor according to the mapping relation.

When setting the mapping relationship, the following rule can be established: the higher the ambient temperature is, the lower the starting differential pressure limit is; the higher the temperature of the shell of the compressor is, the lower the starting pressure difference limit value is; the higher the compressor starting speed, the lower the starting pressure differential limit. That is, the higher the ambient temperature, the greater the refrigerator load, and the greater the starting resistance, the lower the compressor starting differential pressure setting; the higher the temperature of the shell of the compressor is, the smaller the starting torque of the compressor is, and the lower the starting pressure difference setting of the compressor is; the higher the compressor start speed setting, the greater the start resistance, and the lower the compressor start pressure differential setting.

For the real-time pressure difference, the system high pressure and the system low pressure can be measured; and taking the difference value of the high-pressure of the system and the low-pressure of the system as the real-time pressure difference of the target compressor.

In order to measure the high pressure and the low pressure of the system simply and efficiently, a high pressure sensor can be arranged between the drying filter and the condensation preventing pipe, and a low pressure sensor is arranged between the evaporator and the capillary pipe, so that the high pressure of the system can be obtained through the high pressure sensor arranged between the drying filter and the condensation preventing pipe; the system low pressure is obtained by a low pressure sensor arranged between the evaporator and the capillary tube.

The above method is described below with reference to a specific example, however, it should be noted that the specific example is only for better describing the present application and is not to be construed as limiting the present application.

The problem that starting and tripping of the compressor cannot be thoroughly solved due to the fact that the starting time of the existing compressor is fixed, the problem that temperature fluctuation of the refrigerator room is too large due to the fact that the set time of the fixed delay starting time is too long, and the problem that the system pressure difference is too large and starting fails when the compressor is started due to the fact that the set time of the fixed delay starting time is too short are solved. In the embodiment, a scheme for determining the delayed starting time of the compressor by determining the starting pressure difference limit value by considering the ambient temperature, the starting speed of the compressor and the shell temperature of the compressor (indirectly reflecting the starting torque of the compressor, and the starting torque is reduced along with the rise of the shell temperature) is provided.

Specifically, the delayed starting time of the compressor can be determined by a set starting pressure difference, and the compressor is started when the pressure difference is smaller than a set value and a refrigerating request is made in a compartment; and multiple groups of starting differential pressure limit values are set according to the environmental temperature, the shell temperature of the compressor and the starting rotating speed of the compressor so as to adapt to the optimal starting time of the compressor under different working conditions, thereby prolonging the service life of the compressor and reducing the fluctuation range of the compartment temperature.

Specifically, as shown in tables 1, 2, and 3 below, a comparison table is provided between the starting differential pressure limit Δ P, the compressor casing temperature Tk, and the ambient temperature T at different starting rotational speeds (S1, S2, and S3, where S1< S2< S3).

Correspondingly, the higher the ambient temperature, the greater the refrigerator load, and the greater the starting resistance, the lower the compressor starting pressure difference, for example:

1) in table 1, Δ P111> - Δ P121> - Δ P131> - Δ P141> - Δ P151> - Δ P161, that is, in the case that the starting rotational speeds are the same (both S1) and the compressor shell temperature Tk is within the same temperature interval, the higher the ambient temperature T, the higher the starting differential pressure;

2) in table 1, Δ P111> - Δ P112> - Δ P113, that is, in the case where the starting rotational speeds are the same (both S1) and the ambient temperature T is within the same temperature range, the higher the compressor casing temperature Tk is, the larger the starting differential pressure is.

3) In tables 1 to 3, Δ P111> - Δ P211> - Δ P311, that is, in the case where the compressor casing temperature Tk is within the same temperature zone and the ambient temperature T is within the same temperature zone, the higher the starting rotational speed, the larger the starting differential pressure.

As shown in table 1 below, the comparison table of the starting differential pressure limit value, the compressor shell temperature Tk, and the ambient temperature T is shown when the starting rotational speed of the compressor is S1.

TABLE 1

As shown in table 2 below, the comparison table of the starting differential pressure limit value, the compressor shell temperature Tk, and the ambient temperature T is shown when the starting rotational speed of the compressor is S2.

TABLE 2

	Tk≤45℃	45℃＜Tk≤70℃	70℃＜Tk≤90℃
				T≤14℃	△P211	△P212	△P213
14℃＜T≤18℃	△P221	△P222	△P223
				18℃＜T≤23℃	△P231	△P232	△P233
23℃＜T≤29℃	△P241	△P242	△P243
				29℃＜T≤36℃	△P251	△P252	△P253
36℃＜T	△P261	△P262	△P263

As shown in table 3 below, the comparison table of the starting differential pressure limit value, the compressor shell temperature Tk, and the ambient temperature T is shown when the starting rotational speed of the compressor is S3.

TABLE 3

	Tk≤45℃	45℃＜Tk≤70℃	70℃＜Tk≤90℃
				T≤14℃	△P311	△P312	△P313
14℃＜T≤18℃	△P321	△P322	△P323
				18℃＜T≤23℃	△P331	△P332	△P333
23℃＜T≤29℃	△P341	△P342	△P343
				29℃＜T≤36℃	△P351	△P352	△P353
36℃＜T	△P361	△P362	△P363

It should be noted that, in table 1 to table 3, the mapping relationship between the starting differential pressure limit value, the compressor shell temperature and the ambient temperature is shown for different starting rotation speeds of the compressor. In specific implementation, the mapping relation between the starting pressure difference limit value and the shell temperature of the compressor and the starting rotating speed of the compressor can be set when different environmental temperatures are set; similarly, when different compressor shell temperatures are set, the mapping relation between the starting pressure difference limit value and the environment temperature and the starting rotating speed of the compressor can also be set; or directly setting the mapping relation between the three parameters of the environment temperature, the compressor shell temperature and the compressor starting rotating speed and the starting differential pressure limit value, and determining the corresponding starting differential pressure limit value according to the values of the three parameters.

As shown in fig. 2, a schematic diagram of a refrigeration system of a refrigerator, which may include: the system comprises a compressor 1, a condenser 2, an anti-condensation pipe 3, a drying filter 4, a capillary tube 5, an evaporator 6, an air return pipe 7 and the compressor 1. In this example, a high pressure sensor 8 is arranged between the dry filter and the condensation preventing pipe for measuring the high pressure of the system (P1), a low pressure sensor 9 is added between the evaporator and the capillary pipe for measuring the low pressure of the system (P2), and the starting pressure difference DeltaP of the compressor can be obtained from the high pressure of the system and the low pressure of the system, namely P1-P2.

Tables 1, 2 and 3 above show sets of different starting pressure differences for the compressor, which are determined by considering three main factors of the starting speed of the compressor, the shell temperature of the compressor and the ambient temperature (wherein all pressure differences are related to the performance of the compressor, and each type of compressor may be different and may be set at the beginning of the design).

The temperature of the shell of the compressor reflects the temperature rise of a motor of the compressor, and the starting pressure difference of the compressor is set to be smaller (delta P111> deltaP 112> deltaP 113) as the starting torque of the compressor is smaller as the temperature rise of the motor is larger; the higher the environmental temperature is, the larger the system resistance is reflected, so the smaller the setting of the starting pressure difference of the compressor is (delta P111 < deltaP 121> -delta P131> -delta P141> -delta P151> -delta P161); the compressor start-up pressure difference is set to be smaller (Δ P111> Δp211> Δp311) because the compressor is more difficult to start up as the compressor start-up rotation speed is higher. Therefore, a plurality of groups of starting pressure differences can be set according to the environment temperature, the shell temperature of the compressor and the starting rotating speed of the compressor so as to adapt to the optimal starting time of the compressor under different working conditions, thereby ensuring that the compressor can be started normally, protecting the service life of the compressor and reducing the temperature fluctuation range of the refrigerator compartment.

Namely, an intelligent control method for delaying the start of the compressor is provided, whether the compressor is started or not is determined by measuring the differential pressure of a system, and the problem of trip of the start of the compressor can be effectively avoided; the starting pressure difference of the compressor is determined by comprehensively considering various factors, so that the successful starting of the compressor can be ensured, and the temperature fluctuation of the refrigerator compartment can be reduced.

Based on the same inventive concept, the embodiment of the present invention further provides a delayed start control device for a compressor, as described in the following embodiments. The principle of the delayed start control device for the compressor for solving the problems is similar to that of the delayed start control method for the compressor, so the implementation of the delayed start control device for the compressor can refer to the implementation of the delayed start control method for the compressor, and repeated details are not repeated. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated. Fig. 3 is a block diagram of a delayed start control device for a compressor according to an embodiment of the present invention, and as shown in fig. 3, the delayed start control device may include: an obtaining module 301, a determining module 302 and a starting module 303, the structure of which is described below.

An obtaining module 301, configured to obtain a delayed start impact factor of a target compressor;

a determining module 302, configured to determine a starting pressure difference limit corresponding to the target compressor according to the delayed starting impact factor;

and the starting module 303 is configured to obtain a real-time pressure difference of the target compressor, and start the target compressor when the real-time pressure difference reaches the starting pressure difference limit value.

In one embodiment, the delayed initiation influencing factor may include, but is not limited to, at least one of: ambient temperature, compressor shell temperature, compressor starting speed.

In one embodiment, the determining module 302 may be specifically configured to invoke a pre-established mapping relationship; and searching a starting pressure difference limit value corresponding to the delayed starting influence factor according to the mapping relation.

In one embodiment, the mapping relationship may be established according to the following rules:

the higher the ambient temperature is, the lower the starting differential pressure limit is;

the higher the temperature of the shell of the compressor is, the lower the starting pressure difference limit value is;

the higher the compressor starting speed, the lower the starting pressure differential limit.

In one embodiment, the start module 303 may specifically measure a system high pressure and a system low pressure; and taking the difference value of the high-pressure of the system and the low-pressure of the system as the real-time pressure difference of the target compressor.

In one embodiment, the measuring of the system high pressure and the system low pressure can be by acquiring the system high pressure through a high pressure sensor arranged between the drying filter and the condensation preventing pipe; the system low pressure is obtained by a low pressure sensor arranged between the evaporator and the capillary tube.

In another embodiment, a software is provided, which is used to execute the technical solutions described in the above embodiments and preferred embodiments.

In another embodiment, a storage medium is provided, in which the software is stored, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.

From the above description, it can be seen that the embodiments of the present invention achieve the following technical effects: a plurality of starting pressure difference limit values are set according to the delayed starting influence factors, and whether the compressor is started or not is determined through the real-time pressure difference of the compressor, so that the problems of overlarge temperature fluctuation of the refrigerator chamber and compressor trip caused by the fact that the delayed starting time is fixedly set in the prior art can be solved, and the technical effects of avoiding the trip problem of the compressor starting and reducing the temperature fluctuation of the refrigerator chamber are achieved.

Although various specific embodiments are mentioned in the disclosure of the present application, the present application is not limited to the cases described in the industry standards or the examples, and the like, and some industry standards or the embodiments slightly modified based on the implementation described in the custom manner or the examples can also achieve the same, equivalent or similar, or the expected implementation effects after the modifications. Embodiments employing such modified or transformed data acquisition, processing, output, determination, etc., may still fall within the scope of alternative embodiments of the present application.

Although the present application provides method steps as described in an embodiment or flowchart, more or fewer steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an apparatus or client product in practice executes, it may execute sequentially or in parallel (e.g., in a parallel processor or multithreaded processing environment, or even in a distributed data processing environment) according to the embodiments or methods shown in the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded.

The devices or modules and the like explained in the above embodiments may be specifically implemented by a computer chip or an entity, or implemented by a product with certain functions. For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, in implementing the present application, the functions of each module may be implemented in one or more pieces of software and/or hardware, or a module that implements the same function may be implemented by a combination of a plurality of sub-modules, and the like. The above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and other divisions may be realized in practice, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed.

Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may therefore be considered as a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.

The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, classes, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.

From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, or the like, and includes several instructions for enabling a computer device (which may be a personal computer, a mobile terminal, a server, or a network device) to execute the method according to the embodiments or some parts of the embodiments of the present application.

The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The application is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.

While the present application has been described by way of examples, those of ordinary skill in the art will appreciate that there are numerous variations and permutations of the present application that do not depart from the spirit of the present application and that the appended embodiments are intended to include such variations and permutations without departing from the present application.