CN1880895A - Side air blowing method for air-cooling type refrigerator and air-cooling type refrigerator employing the method - Google Patents

Abstract

The invention discloses a side air supply method of an air-cooled refrigerator and an air-cooled refrigerator adopting the air supply method. The air supply method of the air-cooled freezer adopts the one-sided side air supply method, which arranges the air supply and return air outlets relatively on the upper and bottom of the same side wall, so that the cold air is sent out from the top of the side wall and then passed through the side wall. The air return port at the bottom returns; the freezer using this air supply method includes a forced air circulation cooling system, which is characterized in that the air supply port and the return air port are set on the same side wall and the air supply port is set on the top of the side wall, and the return air port is set on the top of the side wall. bottom of the side wall. The air supply method of the present invention and the air-cooled freezer adopting the air supply method can make the cold air form a large recirculation area in the freezer, which not only improves the cooling effect of the food at the bottom of the freezer, but also improves the cooling capacity of the cold air. Fully release to indoor food, the energy efficiency ratio of the refrigeration unit is high, and the space occupied is small.

Description

A kind of side air supply method of air-cooling type refrigerator and adopt the air-cooling type refrigerator of this method

Technical field

The present invention relates to a kind of air supply method and a kind of air-cooling type refrigerator of air-cooling type refrigerator.

Background technology

Now, adopt the refrigerator-freezer of steam compression type refrigeration mostly to be direct-cooling type, cold air is with free convection mode cooling food, its evaporimeter generally is installed in the sidewall of refrigerator-freezer or/and in the diapire, its refrigeration system mainly comprises compressor, condenser, throttling arrangement, device for drying and filtering, parts such as evaporimeter, its course of work is: the refrigerant liquid in the evaporimeter is in low pressure, heat under the low-temperature condition in the absorption refrigerator-freezer and seething with excitement, the low-pressure low-temperature refrigerant vapour that produces is sucked by compressor, become high pressure-temperature gas after compression and enter condenser, because the cooling effect of outdoor air, cold-producing medium is emitted heat and is condensed into liquid to outdoor air in condenser, highly pressurised liquid is through throttling arrangement throttling step-down, get back to evaporimeter again after becoming damp steam, constantly evaporate thus, compression, condensation, the process that moves in circles of throttling, meanwhile, cold-producing medium is periodically taking place to become steam from liquid, become the state variation of liquid from steam, constantly the transfer of heat in the refrigerator-freezer is arrived the refrigerator-freezer outside, thereby reach the purpose of refrigeration.

Because the refrigeration of evaporimeter, air themperature near refrigerator-freezer inner bag place is very low, the saturated humidity of air is little, the water vapour content that can comprise in the air of unit volume is very low, under the effect of low temperature, airborne steam can condense into liquid droplet, and when inner wall temperature is lower than 0 when spending, these droplets can further condense into frost.These frosts have not only reduced the refrigerating efficiency of evaporimeter attached on the inwall, have also increased power consumption, have reduced COP, have also increased the weight of the work of artificial defrosting, have caused the refrigerating loss when opening the cabinet defrosting simultaneously.

EP0769262A2 discloses a kind of air-cooling type refrigerator, this refrigerator-freezer comprises sidewall, diapire, top cover, cold house and forced ventilation circulating cooling system, the upper end that its principal character is the sending of forced ventilation circulating cooling system, return air inlet is oppositely disposed in two opposite side walls, be respectively equipped with one section air channel in two sidewalls and the diapire, three sections air channels form a passage be connected give, between the return air inlet, evaporimeter and fan are arranged in the air channel of refrigerator-freezer diapire.During work, fan is sent the cold wind that evaporimeter makes in the cold house to from the air outlet on the sidewall, the high slightly cold wind of temperature behind the heat of assimilating food draws back evaporimeter from the return air inlet with the air outlet opposing sidewalls and cools off, sends the cold house after the cooling again to, and cooling procedure thus constantly circulates.But this kind mode, because give, the arrangement of return air inlet is to be oppositely disposed in the top, two side, on give, the cloth wind mode of last time makes cold wind relatively poor to the food cooling effect of refrigerator-freezer bottom, especially when storing quantity of food when fewer, this problem is outstanding especially, and, have to allow refrigeration system operation more time so that bottom food is freezed fully in order to improve the cooling effect of bottom food, the Energy Efficiency Ratio of refrigerator-freezer will reduce like this.Though this invention is in order to reduce loss of refrigeration capacity, to improve the refrigeration of cold house, top cover is made one have the very top cover of imperial palace concave space in cold house's side, but its cooling effect to bottom food improves limited, take up room greatly owing to top cover in addition, with compare with the capacity refrigerator-freezer, the refrigerator-freezer of the type totally takes up room greatly.

Summary of the invention

For solving the problems of the technologies described above, the purpose of this invention is to provide and a kind ofly can in refrigerator-freezer, form very big recirculating zone, not only can improve the cooling effect of the food that is positioned at refrigerator-freezer bottom, can also make cold wind with cold fully discharge higher to indoor food, Energy Efficiency Ratio cop, take up room and little refrigerator-freezer and a kind of air supply method.

The air supply method of air-cooling type refrigerator of the present invention is: adopt the air supply mode of single face sidewall, with top and the bottom sent, return air inlet is oppositely disposed in same sidewall, cold wind is sent by the top of sidewall, returned by the bottom of same sidewall.

As the further improvement of the air supply method of this air-cooling type refrigerator, the angle that described cold wind is sent by the air outlet downward-sloping adjustment that makes progress in can be between+10 °～-10 °.Such setting can make this refrigerator-freezer can carry out the selection of wind direction according to the situation of material object, after a little while can be as quantity of food with the downward-sloping certain angle of air outlet, and the Energy Efficiency Ratio of the refrigerator-freezer when having improved few food operation.

As the further optimization of the air supply method of this air-cooling type refrigerator, the flow area when described cold wind is sent by air outlet is the long square-section of the ratio of width to height 25: 1 to 3: 1.Such optimization setting, needed rigidity when having guaranteed further not only that the cold wind air-flow flows in refrigerator-freezer has guaranteed that also the cold wind air-flow forms a big as far as possible recirculating zone in refrigerator-freezer, be beneficial to the exchange heat of cold wind air-flow and food.

As the further optimization of the air supply method of this air-cooling type refrigerator, give, return air inlet between the upper and lower apart from greater than 400mm, and air supply velocity is greater than 1000L/min.If send, the return air inlet spacing is too little, after will causing a part of cold wind to come out from air outlet, can just be drawn back from return air inlet in very short distance, not only the food away from the air-supply oral-lateral is difficult to be cooled off fast, also can cause the unnecessary consumption of fan energy; If air supply velocity is too little, just can't overcome in the cold house drag losses that a large amount of foods are caused, and cause away from the food cooling effect of air-supply oral-lateral poor.

As the air-cooling type refrigerator that adopts above-mentioned air supply method, comprise cabinet, refrigeration system, pressure wind circulating cooling system, wherein: cabinet comprises sidewall, top cover, diapire and the cold house that is surrounded by the three, and sidewall is divided into front side wall, rear wall, left side wall, right side wall; Force the wind circulating cooling system to comprise air outlet, return air inlet and connect the air channel structure between air outlet and the return air inlet and be located at fan in this air channel structure, it is characterized in that: described air outlet and return air inlet are arranged on a same left side or the right side wall, wherein air outlet is arranged in the top of sidewall, the bottom that return air inlet is arranged in sidewall, and two air ports are all towards cold house's side.

As the further improvement of this air-cooling type refrigerator, described air outlet and return air inlet are the mobilizable single deflection grille of blade.Such setting, the cold wind airflow direction when air outlet is sent can carry out upper and lower tilt adjustment according to quantity of food.

As the further improvement of this air-cooling type refrigerator, the distance between the upper and lower of described air outlet and return air inlet is greater than 400mm, and the air supply velocity of air outlet is greater than 1000L/min.If this spacing is too little or air supply velocity is too little, just cause a part of cold wind to come out easily from air outlet after, in very short distance, just drawn back, thereby caused the unnecessary consumption of fan energy from return air inlet.

As the further improvement of this air-cooling type refrigerator, described air outlet and return air inlet are the bar shaped air port, and along the sidewall lateral arrangement.This measure helps enlarging the space that the recirculating zone surrounds.

As a further improvement on the present invention, the side wall sections at described return air inlet and its place is the layout that is inclined upwardly, and its angle of inclination is between 0 to 45 degree.The benefit of doing like this is more to help air-flow evenly introduced reducing the drag losses that air-flow is produced in the air channel structure simultaneously in return air inlet place and the steering procedure that upwards flows.

As a further improvement on the present invention, the length of described air outlet is between 300mm～500mm, and width is between 20mm～100mm; The length of described return air inlet is between 300mm～500mm, and width is between 20mm～100mm.Reasonably give, the return air inlet area, not only reduced the cold wind air-flow and sent eddy current and drag losses in the process, also make this refrigerator-freezer cooling beverage or food effective, the Energy Efficiency Ratio height.

As above-mentioned any described air-cooling type refrigerator, it send, the sidewall at return air inlet place forms recessed in the middle of one, protruding structure up and down in cold house's side, its convex surface and concave surface all with the place parallel sidewalls; Described air outlet is arranged on the convex surface, and return air inlet is arranged in down the bottom of convex surface; Correspondingly be, be connected give, the air channel between the return air inlet comprises from bottom to top: the first vertical section, first horizontal segment, second be section, second horizontal segment vertically.

Embodiment as the evaporimeter set-up mode, described evaporimeter is 2, be finned, and fin is the flat fin with a smooth arc limit, equidistantly arrange, the arc limit of all fins forms the arcwall face of evaporimeter, and two evaporimeters are arranged in the first vertical corner of section and first horizontal segment, the second vertical corner of section and second horizontal segment, and all arcwall face is met the airflow direction setting.

For give, the homonymy of return air inlet arranges that cold wind is entering the air channel from the return air inlet level, when coming out by air outlet, needs turning to several times again, makes cold wind produce very big drag losses in flow process.Equidistantly, the plate fin evaporimeter is arranged on the corner in air channel, and the cambered surface that fin is formed is facingd the wind and is provided with, can make fin can play the effect of water conservancy diversion, can absorb air-flow simultaneously again effectively, improve the Energy Efficiency Ratio of unit greatly in the energy loss that the place of turning round produces.As the further optimization of above-mentioned evaporimeter set-up mode, spacing of fin is at 3～10mm, and fin thickness is between 0.1mm～0.3mm, and wing is high to match with caliber; The heat-transfer pipe caliber is between 6mm～14mm, and the heat-transfer pipe pipe of windward side row number is between 0～3, and tube pitch is between 5mm～13mm.Through evidence, evaporimeter is selected optimization parameter as above for use, and the effectiveness of evaporimeter is best.

Description of drawings

Fig. 1 is that the present invention forces wind circulating cooling system work schematic diagram;

Fig. 2 is a three-dimensional structure diagram of the present invention

Fig. 3 is the vertical half sectional view of the present invention;

Fig. 4 is the perspective view of evaporimeter one specific embodiment of the present invention

Fig. 5 is the scheme of installation of Fig. 4 evaporimeter

The specific embodiment

Now further specify air supply method of the present invention in conjunction with the embodiments and adopt the air-cooling type refrigerator of this method, but scope of the present invention is not limited to the following example, and all variations of being carried out in the scope that it will be appreciated by those skilled in the art that do not break away from purport of the present invention.

As Fig. 1, Fig. 2, shown in Figure 3, air-cooling type refrigerator of the present invention comprises cabinet 1, refrigeration system, pressure wind circulating cooling system.

Wherein cabinet 1 comprises sidewall 11, diapire 12, top cover 13 and the cold house 14 that is surrounded by the three, and sidewall 11 is divided into front side wall 111, rear wall 112, left side wall 113, right side wall 114.

The setting of some refrigeration plants (as compressor) for the benefit of, right side wall 114 can form a ladder-type structure in cold house's side, from top to bottom comprise: wall 1141, middle horizontal walls 1142, downwardly depending wall 1143 upward hang down, it is parallel with left side wall 113 respectively with downwardly depending wall 1143 wherein to go up the wall 1141 that hangs down, and middle horizontal walls 1142 is parallel with diapire 12.Air outlet 28 in the described pressure wind circulating cooling system is located at the top of the wall 1141 that hangs down, and return air inlet 29 is located at the bottom of downwardly depending wall 1143, and two air ports are 14 sides towards the cold house all.For forming circulating current, in right side wall 114, form an air channel structure 213 and be connected between air outlet 28 and the return air inlet 29.For the needs of evaporimeter 41 and fan 22 are set, this air channel structure 213 is formation air compartment 21 in the last wall 1141 that hangs down, described fan 22 be located at air compartment 21 interior with relative position, air outlet 28 axle center, and evaporimeter 41 is located at the below or the rear of fan 22.Like this, when cold wind in air compartment 21 after evaporimeter 41 refrigeration, to be sent in the cold house 14 by air outlet 28 by fan 22 food will be freezed, and the cold wind that has absorbed behind the heat will be got back to the air channel structure 213 from return air inlet 29 under taking out of fan 22 drawn, evaporimeter 41 in air compartment 21 freezes again, then be admitted in the cold house 14 again food is freezed, process so constantly moves in circles.

Here be noted that above-mentionedly give, the sidewall at return air inlet place also can be left side wall 113, its inner air channel structure 213 also and not only is confined to the version in the foregoing description, also can carry out following adjustment:

One, downwardly depending wall 1143 does not make vertical wall and makes a wall that tilts obliquely and be connected with middle horizontal walls 1142.What adapt with it is that return air inlet 29 and air channel herein also form skewed thereupon.Such benefit is exactly at the more down weak more characteristics of air-flow, more helps air-flow is evenly introduced in the air channel structure 213, reduces the drag losses that air-flow is produced in return air inlet 29 places and the flow divert process that makes progress simultaneously.

As the further optimization of this example, middle horizontal walls 1142 and on hang down and between the wall 1,141 one section tilting section can be set further also and reduce fluid resistance loss.Consider that inclined wall can take certain space than vertical wall more, it is excessive that the angle of inclined wall is unfit to do, and is advisable in 45 degree.

Further optimization as this example, air channel structure 213 also can further be provided with the changeover portion of an arc or in its corner conducting element is set along the corner that downwardly depending wall 1143 enters middle horizontal walls 1142 and last vertical wall 1141, reduces in the air current flow process and changes the drag losses that causes because of direction.

Two,, send, 14 sides also can form recessed in the middle of one, protruding structure up and down to return air inlet place sidewall one right side wall 114 in the cold house for further reducing cold wind in the eddy current loss at air outlet 28, return air inlet 29 places and be convenient to the setting of fan 22 and evaporimeter 41.Its concrete structure as shown in Figure 2, the epimere of the wall 1141 that upward hangs down 111,112 14 protrudes out and forms convex surface 11441 in the cold house along the two side, front and back.Like this, give, the right side wall 114 at return air inlet place in the cold house recessed in the middle of just having formed one, the protruding structure in two ends up and down of 14 sides, its convex surface is all parallel with sidewall 113 with concave surface, and air outlet 28 then is located on the convex surface 1141,29 bottoms that are arranged in down convex surface 11442 of return air inlet.Correspondingly be, be connected give, the air channel structure 213 between the return air inlet comprises from bottom to top: first vertical vertical section 2133, second horizontal segment 2134 of section 2131, first horizontal segment 2132, second.As further optimization, the length that last convex surface 2131 stretches out (is being advisable in 20～60mm) scopes, is so neither being caused the waste in space can reduce the eddy current loss of cold wind at return air inlet 29 places again.

Further optimization as the foregoing description, no matter adopt which kind of air channel structure, air outlet 28 and return air inlet 29 between the upper and lower apart from guaranteeing greater than at 400mm, and the air supply velocity of air outlet 28 should be greater than 1000L/min, we get preferred values: apart between 600mm, the air supply velocity of air outlet 28 is 1200L/min between the upper and lower.If send, the return air inlet spacing is too little, after will causing a part of cold wind to come out from air outlet 28, just drawn back from return air inlet 29 in very short distance, not only the food away from air outlet 28 sides is difficult to be cooled off fast, also can cause the unnecessary consumption of fan energy; If air supply velocity is too little, just can't overcome the drag losses that a large amount of foods are caused in the cold house 14, and cause away from the food cooling effect of air-supply oral-lateral poor.

As the further improvement of the sending of this air-cooling type refrigerator, return air inlet, air outlet 28 all is arranged to the bar shaped air port with return air inlet 29, along the sidewall lateral arrangement.The length that guarantees air outlet 28 simultaneously is between 300mm～500mm, and width is between 20mm～100mm; The length of return air inlet 29 is between 300mm～500mm, and width is between 20mm～100mm; Here, we get one group of preferred values: the total length 400mm of air outlet 28, width 30mm; The length 500mm of return air inlet, width is between the 40mm. more than give, the reasonable setting of return air inlet area, through our experimental results show that, both guaranteed desired rigidity in the process of air delivery, air-flow is more evenly distributed along the width of refrigerator-freezer cold house 14, also makes fan organize energy consumption still less simultaneously air-flow!

Concrete form for air outlet 28, there is following form to elect: grating type, the mobilizable individual layer of blade or double-deck louvered, to make the cold wind of sending form radial rectangular jet device formula, also can be further do some branch air port of air-supply downwards to air outlet 28, to strengthen the disturbance of the air-flow between the sending of nearly wall side, the return air inlet.In these selectable air outlet types, the mobilizable individual layer blinds of our preferred blades air outlet.Like this, we could adjust air supply direction according to quantity of food, to reduce unnecessary loss of refrigeration capacity and fan energy consumption!

Structure type for return air inlet 29 can adopt rectangle net formula, grate plate formula, grating type, air grille formula.For matching with return air inlet 29, the mobilizable individual layer blinds of our preferred blades return air inlet, because such selection not only can prevent foreign matter and enter in the air channel 213, can also adjust the return air direction according to the situation of food, also can not cause the drag losses at return air inlet place too big simultaneously.

As refrigeration system of the present invention, its refrigeration part evaporimeter 41 also can further be optimized setting according to the air channel structure 213 at its place: when sending, 14 sides are recessed in the middle of just forming one in the cold house for the right side wall 115 at return air inlet place, during protruding up and down structure, another kind of set-up mode as evaporimeter 41, as shown in Figure 5, evaporimeter adopts 2, series connection, be arranged in middle horizontal walls 1142 and last vertical wall 1141, the corner of downwardly depending wall 1143, as shown in Figure 4, the evaporimeter 41 that it adopted is for finned, and fin is the plate fin 412 with smooth arc limit, equidistantly be arranged on the heat-transfer pipe 412, the arc limit of all fins 412 forms the cambered surface of evaporimeter, and this cambered surface is met the airflow direction setting.For give, the homonymy of return air inlet arranges that cold wind enters in the air channel 213 in return air inlet 29 place's levels, turns to again on vertical direction, having arrived air outlet also needs level to turn to, and turns to so several times to make cold wind produce very big drag losses in flow process.Equally spaced plate fin evaporimeter is arranged on the corner in air channel, and the cambered surface setting down with the wind that fin is formed, and can play the effect of diversion component, can also absorb the energy loss that the cold wind air-flow causes because of eddy current herein simultaneously, kills two birds with one stone.As the further optimization of this evaporimeter, preferred parameter is: described spacing of fin is at 3～10mm, and fin thickness is between 0.1mm～0.3mm, and wing is high to match with caliber; The heat-transfer pipe caliber is between 6mm～14mm, and the heat-transfer pipe pipe of windward side row number is between 0～3, and tube pitch is between 5mm～13mm.Experimental analysis through us obtains, and in the time of in the structural parameters of equidistant finned evaporator are during above-mentioned, is the most compromise a kind of scheme between its water conservancy diversion effect, heat exchange effect and the drag losses, and its resultant effect is best.

From above-mentioned description as can be known, the present invention is owing to adopt the layout up and down of air outlet 28 and return air inlet 29 same sidewalls, after being sent by the air outlet 28 that is arranged in sidewall upper, cold wind returns by the return air inlet 29 that is positioned at same sidewall bottom again, so not only make the stroke of cold wind in refrigerator long, can also produce very big recirculating zone, make cold wind in stroke each time, be able to the cold house in food carry out sufficient exchange heat; When the further employing of this refrigerator-freezer can be adjusted the individual layer louvered air port of angle up and down, can also make refrigerator-freezer carry out the selection of wind direction, the Energy Efficiency Ratio of the refrigerator-freezer when having improved the operation of few food according to the situation of material object; The air channel structure of adopt optimizing when this refrigerator-freezer, send the air port dimensional parameters back to and when evaporimeter is provided with cleverly, can also significantly reduce air-flow by return air inlet 29 enter air channel structure 213, eddy current and drag losses in the process sent by air outlet 28 again.Above technology makes air-cooling type refrigerator among the present invention, and not only cooling beverage or food is effective, and also efficiency is than high! Simultaneously, that will top cover do is very big very thick, has saved the space, makes refrigerator-freezer be convenient to laying of user.

For the benefit of air-flow flowing in the cold house can further be provided with the hanger (scheming not shown) of hanging basket on the inner bag of refrigerator-freezer.

Claims (13)

1. An air supply method for an air-cooled freezer, using a forced air circulation cooling system to force the cold air to flow to cool food, characterized in that: the air supply method is adopted on one side and one side, and the air supply and return air outlets are relatively arranged on the same The upper part and the bottom of the side wall make the cold wind be sent out from the upper part of the side wall, and return by the bottom of the same side wall. 2. The air supply method according to claim 1, characterized in that: the angle at which the cold air is sent from the air supply port can be adjusted up and down within +10°--10°. 3. The air supply method according to claim 2, characterized in that: when the cold air is sent out from the air outlet, the cross section of the air flow is a long rectangular section with an aspect ratio between 25:1 and 3:1. 4. The air supply method according to claim 3, characterized in that: the vertical distance between the air supply and return air outlets is greater than 400mm, and the air supply speed is greater than 1000L/min. 5. An air-cooled freezer, including a cabinet body, a refrigeration system, and a forced air circulation cooling system, wherein: the cabinet body includes a side wall, a top cover, a bottom wall and a cold room surrounded by the three, and the side wall is divided into It is the front side wall, the rear side wall, the left side wall and the right side wall; the forced air circulation cooling system includes the air supply port, the return air port, the air channel structure connecting the air supply port and the air return port, and the air channel structure The fan is characterized in that: the air supply port and the air return port are arranged on the same left or right side wall, wherein the air supply port is arranged on the upper part of the side wall, and the return air port is arranged on the bottom of the side wall, both of which are facing the cold room side. 6. The air-cooled freezer according to claim 5, characterized in that: the air supply port and the air return port are both single-layer louvered air ports with movable blades. 7 . The air-cooled refrigerator according to claim 6 , wherein the air supply outlet and the air return outlet are rectangular and arranged transversely along the side wall. 7 . 8 . The air-cooled refrigerator according to claim 7 , wherein the air return port and the side wall section where it is located are inclined upward, and the inclination angle is between 0 and 45 degrees. 9. The air-cooled freezer according to claim 7 or 8, characterized in that: the vertical distance between the air supply port and the air return port is greater than 400m, and the air supply speed of the air supply port is greater than 1000L/min. 10. The air-cooled freezer according to claim 9, characterized in that: the length of the air supply port is between 300 mm and 500 mm, and the width is between 20 mm and 100 mm; the length of the return air port is between 300 mm and 500 mm. between 20mm and 100mm in width. 11. The air-cooled freezer according to claim 5, characterized in that: the side wall where the air supply and return air outlets are located forms a concave in the middle and convex up and down on the side of the cold room, and the convex and concave surfaces are all aligned with the opposite side. The walls are parallel; the air supply port is arranged on the upper convex surface, and the air return port is arranged on the bottom of the lower convex surface; correspondingly, the air duct connected between the air supply and return air ports includes from bottom to top: the first vertical section, the second A horizontal segment, a second vertical segment, and a second horizontal segment. 12. The air-cooled freezer according to claim 11, characterized in that: there are two evaporators, both of which are finned, and the fins are all flat fins with a smooth arc edge, etc. Arranged at intervals, the arc-shaped sides of all fins form the arc-shaped surface of the evaporator; the two evaporators are respectively arranged at the corner of the first vertical section and the first horizontal section, and the corner of the second vertical section and the second horizontal section and are set on the arc-shaped surface facing the airflow direction. 13. The air-cooled freezer according to claim 12, characterized in that: the pitch of the fins is 3-10mm, the thickness of the fins is between 0.1mm-0.3mm, and the fin height matches the tube diameter; the heat transfer tube The tube diameter is between 6mm and 14mm, the number of rows of heat transfer tubes on the windward side is between 0 and 3, and the tube spacing is between 5mm and 13mm.

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