Commercial freezer of intelligence
Technical Field
The invention relates to the technical field of refrigerators, in particular to an intelligent commercial refrigerator.
Background
The refrigerator has the same structure as that of a refrigerator, and consists of a box body, a refrigerating system and a temperature control device, wherein the refrigerating system of the refrigerator mainly comprises a compressor, a condenser, an evaporator and a capillary tube, and a closed circulating system is formed by the compressor, the condenser, the evaporator and the capillary tube. Wherein the evaporator is installed at the upper part of the refrigerator, and other components are installed at the back of the refrigerator. The system is filled with a substance called Freon as refrigerant. Freon is vaporized into gas by low pressure liquid in the evaporimeter, absorb the heat in the refrigerator, make incasement temperature reduce, more and more consumers begin to pay attention to dietetic hygiene on the market now, what the customer at first looked when selecting commodity is exactly the outward appearance, freezer that fresh-keeping function is strong just enables food and keeps fresh lastingly, in order to satisfy customer's demand, each big trade company will pay attention to its fresh-keeping function when purchasing the freezer very much, but commercial freezer is owing to need often open, the environment in the freezer can often contact with the external environment, at this moment the external environment can lead to the fact the pollution to the refrigerated article in the freezer, and the external environment temperature also can influence the temperature in the freezer, temperature influence and the refrigerated article contact pollution of outside air contact all can make refrigerated article breed the bacterium easily, thereby the safety of refrigerated article has been influenced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an intelligent commercial refrigerator which has the advantages of improving the environmental quality of the refrigerator, reducing the bacterial breeding in the refrigerator and the like, and solves the problem that the refrigerator is polluted by the external environment after being opened and then is contacted with the external environment to breed bacteria.
(II) technical scheme
In order to achieve the purposes of improving the environment quality of the refrigerator and reducing the bacterial breeding in the refrigerator, the invention provides the following technical scheme: an intelligent commercial refrigerator comprises a first box body, a second box body and a third box body, wherein the first box body is a rectangular box body, the inner space of the first box body is a refrigerating area of the refrigerator, a partition plate is fixedly arranged in the first box body and divides the space in the first box body into two parts, a space in the first box body above the partition plate is a storage area, a first support plate is further arranged above the partition plate and is fixedly arranged in the first box body, articles in the storage area are placed on the first support plate, a water leakage hole is formed in the first support plate, a leakage hole is formed in the partition plate and communicates the storage area with the space of the first box body below the partition plate, a second support plate is fixedly arranged on the bottom surface of the inner wall of the first box body and is a left-inclined plate, a first fan is fixedly arranged on the second support plate, the first fan is located at the center of the inner bottom surface of the first box body, and the leakage holes are formed in the periphery of the first fan in the vertical space of the first box body.
Preferably, box two and box three all with box one fixed connection, box two sets up in box three top, box two and three same fixed connection of box, a rectangle body is constituteed to box one, box two and box three, be provided with backup pad three in the box three, be provided with the power supply in the backup pad three, the power supply is whole freezer refrigerating system's compressor, and the power supply provides the refrigeration liquid for whole freezer, fixed mounting has the drain pipe on the wall of the below of backup pad three, the inner space of drain pipe intercommunication box three and the exterior space of freezer, just be located the left end department of backup pad two on the wall that box three and box contacted and seted up the intercommunicating pore, the inner space of intercommunicating pore intercommunication box three and box one.
Preferably, the second box body is also subjected to refrigerating fluid provided by a power source to achieve a refrigerating effect, a backflow air return opening and a backflow air inlet are formed in the wall, in contact with the first box body, of the second box body, the backflow air return opening is arranged above the backflow air inlet, a first circulation air return pipe and a first circulation air inlet pipe are respectively arranged in the backflow air return opening and the backflow air inlet, the left end of the first circulation air return pipe and the left end of the first circulation air inlet pipe are both arranged in the second box body, a second fan is fixedly mounted on the inner wall of the left side of the second box body, and the first fan blows to the first circulation air inlet pipe.
Preferably, the right end of the first circulating air return pipe is fixedly connected with an air box, the side wall of the air box is provided with a first air box air inlet, a second air box air inlet and a third air box air inlet from top to bottom in sequence, a U-shaped block is further arranged in the first circulating air return pipe and can move up and down in the air box under the electromagnetic control, the right end of the U-shaped block is attached to the inner wall of the air box, the first circulating air inlet pipe is fixedly provided with a first air storage box which is fixedly arranged in a partition plate, the first air storage box is provided with a first air outlet which is communicated with the inner space of the first air storage box, a second circulating air inlet pipe is fixedly arranged between the first circulating air inlet pipe and the first air storage box and on the first circulating air inlet pipe, the second circulating air inlet pipe is communicated with the second air box air inlet, and the third air box is fixedly connected with a second return pipe, the right-hand member fixedly connected with air storage box two of back flow two, air storage box two utilizes two inner spaces of back flow to be linked together with the inner space of circulation return air duct one, air outlet two has been seted up on the air storage box two, air storage box two sets up in the top wall, two intercommunication box inner space of air outlet and air storage box two, the backward flow hole has been seted up on the right side wall of box one, fixed mounting has back flow one on the backward flow hole, back flow one is connected to on the bellows wind gap one, bellows, back flow one, circulation air-supply line two and back flow two all set up in the wall of box one.
Preferably, when the U-shaped block is positioned at the bottom end of the inner wall of the air box, the U-shaped groove of the U-shaped block is communicated with the air box air opening II and the air box air opening III, the first circulating air return pipe, the air box and the first return pipe form an air pipe of a passage, and the second circulating air inlet pipe, the U-shaped block and the second return pipe form an air pipe of another passage.
Preferably, when the U-shaped block is positioned on the top surface of the interior of the air box, the U-shaped block is communicated with the first air box air opening and the second air box air opening, the first circulating air return pipe, the second circulating return pipe and the air storage box form a passage air pipe, and the second circulating air inlet pipe, the U-shaped block and the first circulating return pipe form another passage air pipe.
Preferably, a first filter plate, a second filter plate and a third filter plate are fixedly arranged in the second box body.
Preferably, the fixed moving mechanism that is provided with in below of freezer, moving mechanism is including support, pivot one and runner, support fixed mounting is on box one and three bottom surfaces of box the slewing mechanism that pivot one is common bearing and connecting rod and constitutes, the bearing inner race fixed connection of support and pivot one, the connecting rod fixed connection of runner and pivot one.
Preferably, a sealing cover is arranged at the top end of the first box body, a second rotating shaft is fixedly installed on the left side of the sealing cover, the second rotating shaft is identical to the first rotating shaft in structure, the second rotating shaft is fixedly connected with the top end of the left side wall of the first box body, inductors are arranged on the top end walls of the sealing cover and the first box body, when the sealing cover is separated from the first box body, the storage area is in an open state, the U-shaped block is located on the inner bottom surface of the air box, and when the sealing cover and the first box body are completely closed, the storage area is in a closed state, and the U-shaped block is located on the inner top.
(III) advantageous effects
Compared with the prior art, the invention provides an intelligent commercial refrigerator which has the following beneficial effects:
1. when the sealing cover is separated from the first box body, the storage area is in an open state at the moment, articles and air in the storage area are in contact with the external environment, the amount of water vapor, dust and bacteria in the storage area is increased, the U-shaped block is positioned on the inner bottom surface of the air box by utilizing electromagnetic control, the U-shaped groove of the U-shaped block is communicated with the second air box opening and the third air box opening, the first circulating air return pipe, the air box and the first return pipe form a passage air pipe, the second circulating air inlet pipe, the U-shaped block and the second return pipe form another passage air pipe, one part of cold air conveyed from the first circulating air inlet pipe is discharged into the space in the storage area through the air outlet, the other part of cold air conveyed from the first circulating air inlet pipe is conveyed into the second air storage box through the second circulating air inlet pipe, the U-shaped block and the second return pipe and is discharged into the storage area through the, air in the storage area is discharged into the second box body from the return hole, the first return pipe, the air box and the first air storage box and the second air storage box simultaneously convey the air processed by the second box body into the storage area, and the purification efficiency of the air in the storage area is improved.
2. The intelligent commercial refrigerator is characterized in that after a sealing cover and a first box body are completely closed, the storage area is in a closed state, the quantity of articles in the storage area and water vapor, dust and bacteria in air is not greatly changed, a U-shaped block is positioned on the top surface inside an air box by utilizing electromagnetic control, the U-shaped block is communicated with a first air box air inlet and a second air box air inlet, a first circulating air return pipe, a second return pipe and the air storage box form a channel air pipe, a second circulating air inlet pipe, the U-shaped block and the first return pipe form another channel air pipe, one part of cold air conveyed from the first circulating air inlet pipe is discharged into the storage area from an air outlet, and then conveyed into the second air storage box from the air outlet, and due to the fact that the air pressure in the second box body is reduced, air in the second air storage box is discharged into the second box body from the second return pipe, the air box and the first circulating air inlet pipe, and the other part of cold air conveyed, carry the storing district through back flow first and backward flow hole in, then in carrying bellows from air outlet two equally, in the box two is arranged to the box from the circulation return air hose again, the air that the second box of process that the circulation air-supply line was carried and is come is discharged from storing wind box earlier on the storing district, then in storing wind box two inhales box two from the storing district, slows down the air circulation speed in the storing district, guarantees the stability of the environment in the storing district, promotes the stability of placing object article in the storing district.
3. This commercial freezer of intelligence, the comdenstion water of hole seepage that leaks drops on the inner wall bottom surface of box one from the seepage hole, fixed mounting has backup pad two on the inner wall bottom surface of box one, backup pad two is a board to the left bank fixed mounting has fan one in the backup pad two, and the fan air-out upwards can drive the air cycle in the storing district, makes the refrigeration effect in the storing district reach evenly.
4. This commercial freezer of intelligence bloies in to the storing district through the fan one from the weeping hole, guarantees the air circulation speed in the storing district, and it is slow to avoid the air in the storing district because the air replacement speed that does not flow in resulting in the storing district, and then has reduced and has multiplied more bacterium, guarantees the air circumstance quality in storing district.
5. This commercial freezer of intelligence, the comdenstion water that produces in the storing district can also be followed the hole that leaks and the hole that leaks drops to backup pad two on, the comdenstion water carries box three in through backup pad two's water conservancy diversion effect, and the comdenstion water can carry out cooling treatment to refrigerating system's power supply, guarantees the normal operating of power supply, can use the comdenstion water simultaneously, makes the maximize utilization of resource.
6. This commercial freezer of intelligence, through still fixed mounting have filter one in box two, filter two and filter three, the air of coming is carried from circulation return air pipe one, filter two and filter three's filter effect, get rid of the steam in the air that comes is carried to circulation return air pipe one, granule dust and bacterium, the air after the filtration is carried the storing district from circulation air-supply line one, can reach the effect of the interior air of replacement storing district, guarantee under the unchangeable condition of the temperature of the interior air of storing district, can promote the air circumstance quality in the storing district, reduce the volume of bacterium and granule dust in the storing district, guarantee the security of the cold-stored article of needs that the storing district was placed.
7. This commercial freezer of intelligence, the position of fan one is in the inside bottom surface central point of box one and puts, the position of leakage hole sets up around fan one on the vertical space of box one, and the comdenstion water that drops from the leakage hole can not directly drop fan one, and the comdenstion water that avoids the leakage hole to drop has guaranteed the normal operating of fan one to fan one.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a state view of the U-shaped block of the present invention at the bottom end of the inner wall of the bellows;
FIG. 4 is a view showing a state where a U-shaped block of the present invention is disposed at the top end of the inner wall of the bellows;
FIG. 5 is a schematic structural diagram of a moving mechanism according to the present invention.
In the figure: 1 box body I, 11 supporting plate I, 12 water leakage holes, 13 separating plates, 14 leakage holes, 15 supporting plate II, 16 fan I, 17 return holes, 18 return pipe I, 19 storage areas, 2 box body II, 21 return air inlets, 22 return air inlets, 23 fan II, 24 filter plate I, 25 filter plate II, 26 filtering plate III, 3 box body III, 31 supporting plate III, 32 power source, 33 liquid outlet pipe, 4 moving mechanism, 41 support, 42 rotating shaft I, 43 rotating wheel, 5 circulating return air pipe I, 51 air box, 52 air box air inlet I, 53 air box air outlet II, 54 air box air inlet III, 55U-shaped block, 6 circulating air inlet pipe I, 61 circulating air inlet pipe II, 7 air storage box I, 71 air outlet I, 8 air storage box II, 81 air outlet II, 82 return pipe II, 9 sealing cover and 91 rotating shaft II.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, an intelligent commercial refrigerator comprises a first box body 1, a second box body 2 and a third box body 3, wherein the first box body 1 is a rectangular box body, the internal space of the first box body 1 is a refrigerating area of the refrigerator, a partition plate 13 is fixedly arranged in the first box body 1, the space in the first box body 1 is divided into two parts by the partition plate 13, a storage area 19 is arranged in the first box body 1 above the partition plate 13, articles to be refrigerated are placed in the storage area 19, a first support plate 11 is further arranged above the partition plate 13, the first support plate 11 is fixedly arranged in the first box body 1, the articles in the storage area 19 are placed on the first support plate 11, water leakage holes 12 are formed in the first support plate 11, and condensed water generated when the articles in the storage area 19 are contacted with the external environment leaks downwards from the water leakage holes 12, the partition plate 13 is provided with a leakage hole 14, the leakage hole 14 is communicated with a storage area 19 and a space of the box body I1 below the partition plate 13, condensed water leaked from the leakage hole 12 falls onto the bottom surface of the inner wall of the box body I1 from the leakage hole 14, a support plate II 15 is fixedly installed on the bottom surface of the inner wall of the box body I1, the support plate II 15 is a plate inclined to the left, a fan I16 is fixedly installed on the support plate II 15, the position of the fan I16 is located at the central position of the inner bottom surface of the box body I1, the position of the leakage hole 14 is arranged around the fan I16 in the vertical space of the box body I1, the condensed water falling from the leakage hole 14 cannot directly fall onto the fan I16, the damage of the condensed water falling from the leakage hole 14 to the fan I16 is avoided, the fan I16 is blown upwards, and air circulation in the storage area 19 can be driven, the cooling effect in the storage area 19 is made uniform.
The box body II 2 and the box body III 3 are fixedly connected with the box body I1, the box body II 2 is arranged above the box body III 3, the box body II 2 and the box body III 3 are fixedly connected with each other, the box body I1, the box body II 2 and the box body III 3 form a rectangular body, the regular shape of the whole refrigerator is guaranteed, the refrigerator is convenient to place, a support plate III 31 is arranged in the box body III 3, a power source 32 is arranged on the support plate III 31, the power source 32 is a compressor of the whole refrigerator refrigerating system, the power source 32 provides refrigerating liquid for the whole refrigerator, the power source 32 is an existing mechanism, unnecessary description is not made here, a liquid outlet pipe 33 is fixedly arranged on the wall below the support plate III 31, the liquid outlet pipe 33 is communicated with the inner space of the box body III 3 and the outer space of the refrigerator, a communicating hole is formed in the wall where the box body III 3 is contacted with the box body I, the intercommunicating pore communicates the internal space of the box body 3 and the box body 1, the condensed water generated in the box body 1 flows into the box body 3 through the diversion effect of the supporting plate 15, the condensed water can cool the power source 32 of the refrigerating system, the normal operation of the power source 32 is ensured, and the condensed water can be used at the same time, so that the resources are utilized to the maximum.
The second box body 2 is also subjected to refrigerating fluid provided by the power source 32 to achieve a refrigerating effect, a backflow air return port 21 and a backflow air inlet 22 are formed in the wall of the second box body 2, which is in contact with the first box body 1, the backflow air return port 21 is arranged above the backflow air inlet 22, a first circulating air return pipe 5 and a first circulating air inlet pipe 6 are respectively arranged in the backflow air return port 21 and the backflow air inlet 22, the left end of the first circulating air return pipe 5 and the left end of the first circulating air inlet pipe 6 are both arranged in the second box body 2, a second fan 23 is fixedly arranged on the inner wall of the left side of the second box body 2, the second fan 23 blows air to the first circulating air inlet pipe 6, the right end of the first circulating air return pipe 5 is fixedly connected with an air box 51, a first air box 52, a second air box air inlet 53 and a third air box air inlet 54 are sequentially formed in the side wall of the air box 51 from top to bottom, and a U, the U-shaped block 55 can move up and down in the air box 51 under the electromagnetic control, the U-shaped block 55 is provided with an existing electromagnetic control valve, details are not repeated, the right end of the U-shaped block 55 is attached to the inner wall of the air box 51, the first circulation air inlet pipe 6 is fixedly provided with the first air storage box 7, the first air storage box 7 is fixedly arranged in the partition plate 13, the first air storage box 7 is provided with a first air outlet 71, the first air outlet 71 is communicated with the inner space of the first air storage box 7 and the inner space of the 1, the second circulation air inlet pipe 61 is fixedly arranged between the first circulation air inlet pipe 6 and the first air storage box 7 and on the first circulation air inlet pipe 6, the second circulation air inlet pipe 61 is communicated with the second air box 53, the third air inlet box 54 is fixedly connected with the second return pipe 82, the right end of the second return pipe 82 is fixedly connected with the second air storage box 8, the inner space of the second return pipe 82 is communicated with the inner space, the air storage box II 8 is provided with an air outlet II 81, the air storage box II 8 is arranged in the top end wall of the air storage box II 1, the air outlet II 81 is communicated with the inner space of the box body I1 and the inner space of the air storage box II 8, the right side wall of the box body I1 is provided with a return hole 17, a return pipe I18 is fixedly arranged on the return hole 17, the return pipe I18 is connected to an air box inlet I52, the air box 51, the return pipe I18, the circulating air inlet pipe II 61 and the return pipe II 82 are all arranged in the wall of the box body I1, when the U-shaped block 55 is positioned at the bottom end of the inner wall of the air box 51, the U-shaped groove of the U-shaped block 55 is communicated with the air box inlet II 53 and the air box inlet III 54, the circulating air return pipe I5, the air box 51 and the return pipe I18 form a passage, the circulating air inlet pipe II 61, the U-shaped block 55 and the return pipe II 82 form another air pipe passage, the other part of the cold air delivered from the first circulation air inlet pipe 6 is delivered to the second air storage box 8 through the second circulation air inlet pipe 61, the U-shaped block 55 and the second return pipe 82 and is discharged into the first storage box 19 from the second air outlet opening 81, after the air pressure in the second storage box 19 is increased, the air in the second storage box 19 is discharged into the second box body 2 from the return hole 17, the first return pipe 18, the first air box 51 and the second air box 5, the specific flow path is as shown in fig. 3, when the U-shaped block 55 is positioned on the inner top surface of the air box 51, the U-shaped block 55 is communicated with the first air box opening 52 and the second air box opening 53, the first circulation return pipe 5, the second return pipe 82 and the second storage box 8 form a passage air pipe, the second circulation air inlet pipe 61, the U-shaped block 55 and the first return pipe 18 form another passage air area, and a part of the cold air delivered from the first circulation air inlet pipe 6 is discharged into, due to the reduction of the air pressure in the second box body 2, the air in the second air storage box 8 is discharged into the second box body 2 from the second return pipe 82, the air box 51 and the first circulation air return pipe 5, the other part of cold air conveyed from the first circulation air inlet pipe 6 is discharged into the U-shaped block 55 from the second circulation air inlet pipe 61, conveyed into the storage area 19 through the first return pipe 18 and the return holes 17, then conveyed into the air box 51 from the second air outlet 81, and then discharged into the second box body 2 from the first circulation air return pipe 5. specifically, as shown in fig. 4, a first filter plate 24, a second filter plate 25 and a third filter plate 26 are fixedly arranged in the second box body 2, the air conveyed from the first circulation air return pipe 5 passes through the first filter plate 24, the second filter plate 25 and the third filter plate 26 to remove the water vapor, particle dust and bacteria in the air conveyed from the first circulation air return pipe 5, the filtered air is conveyed into the storage area 19 from the first circulation air inlet pipe, can reach the effect of the interior air of replacement storing district 19, guarantee under the little condition of temperature variation of the interior air of storing district 19, can promote the air circumstance quality in storing district 19, reduce the volume of steam, bacterium and granule dust in storing district 19, guarantee the security of the cold-stored article of needs that storing district 19 placed.
The fixed moving mechanism 4 that is provided with in below of freezer, moving mechanism 4 is including support 41, a pivot 42 and runner 43, the slewing mechanism that a pivot 42 is common bearing and connecting rod constitution, the bearing inner race fixed connection of support 41 and a pivot 42, runner 43 and the connecting rod fixed connection of a pivot 42 guarantee that runner 43 can free rotation on support 41, and utilize support 41's protection effect, guarantee runner 43's normal operating, and moving mechanism 4 provides mobilizable effect for the freezer, provides convenient for the removal of freezer.
The top of the first box body 1 is provided with a closed cover 9, the left side of the closed cover 9 is fixedly provided with a second rotating shaft 91, the second rotating shaft 91 is identical to the first rotating shaft 42 in structure, the second rotating shaft 91 is fixedly connected with the top end of the left side wall of the first box body 1 to ensure that the closed cover 9 can freely rotate on the top end of the first box body 1, the top end walls of the closed cover 9 and the first box body 1 are provided with sensors, when the closed cover 9 is separated from the first box body 1, the storage area 19 is in an open state at the moment, articles and air in the storage area 19 are contacted with the external environment, the amount of water vapor, dust and bacteria in the storage area 19 is increased, the U-shaped block 55 is positioned on the inner bottom surface of the air box 51 under electromagnetic control, the first air storage box 7 and the second air storage box 8 simultaneously convey the air processed by the second box body 2 into the storage area 19, the purification efficiency of the air in the storage area 19, at the moment, the storage area 19 is in a closed state, the quantity of articles in the storage area 19 and water vapor, dust and bacteria in the air is not changed greatly, the U-shaped block 55 is positioned on the top surface of the inside of the air box 51 under the electromagnetic control, the air which is conveyed by the first circulating air inlet pipe 6 and is processed by the second box body 2 is discharged from the first storage box 7 to the storage area 19, then the second storage box 8 is sucked into the second box body 2 from the storage area 19, the air circulation speed in the storage area 19 is reduced, the stability of the environment in the storage area 19 is guaranteed, and the stability of the articles placed in the storage area 19 is improved.
When the air purifier is used, the power supply of all electric appliances is turned on, when the sealing cover 9 is separated from the first box body 1, the storage area 19 is in an open state, articles and air in the storage area 19 are in contact with the external environment, the amount of moisture, dust and bacteria in the storage area 19 is increased, the U-shaped block 55 is positioned on the inner bottom surface of the air box 51 under the electromagnetic control, the first air storage box 7 and the second air storage box 8 simultaneously convey air treated by the second box body 2 into the storage area 19, the purification efficiency of the air in the storage area 19 is improved, when the sealing cover 9 is completely closed with the first box body 1, the storage area 19 is in a closed state, the amounts of the articles and the moisture, the dust and the bacteria in the air in the storage area 19 are not greatly changed, the U-shaped block 55 is positioned on the inner top surface of the air box 51 under the electromagnetic control, the air treated by the second box body 2 conveyed by the first circulation pipe 6 is discharged from the first storage area 7, then the second air storage box 8 is sucked into the second box body 2 from the storage area 19, the air circulation speed in the storage area 19 is reduced, the stability of the environment in the storage area 19 is ensured, the stability of articles placed in the storage area 19 is improved, meanwhile, the first fan 16 blows air into the storage area 19 from the leakage holes 14, the air circulation speed in the storage area 19 is ensured, the problem that the air in the storage area 19 cannot flow so that the air replacement speed in the storage area 19 is slow is avoided, thereby breed more bacteriums, the comdenstion water that produces in the storing district 19 can also be followed hole 12 and the hole 14 that leaks and drop to backup pad two 15, and in the box three 3 was carried to the comdenstion water through the water conservancy diversion effect of backup pad two 15, the comdenstion water can carry out cooling treatment to refrigerating system's power supply 32, guarantees power supply 32's normal operating, can use the comdenstion water simultaneously, makes the maximize utilization of resource.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.