CN103975207A

CN103975207A - Refrigerator

Info

Publication number: CN103975207A
Application number: CN201280060351.0A
Authority: CN
Inventors: 堀尾好正; 西村晃一; 堀井慎一; 宫坂亚有子
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2011-12-06
Filing date: 2012-12-03
Publication date: 2014-08-06
Also published as: EP2789940B1; WO2013084460A1; EP2789940A4; EP2789940A1

Abstract

A refrigerator is provided with: a cooler (107) provided on the rear surface side of the refrigerator and generating cool air; and a cooler cover (120) having a defrosting heater (132) which is provided below the cooler (107) and also having a cool air return opening (135). The center of the defrosting heater (132) is located above the lower surface of a freezing compartment. A protrusion member (136) protruding toward the inside of the refrigerator is disposed on the lower surface of the freezing compartment. The lower end of the cool air return opening (135) and the upper end of the protrusion member (136) are overlapped in the height direction.

Description

Freezer

Technical field

The present invention relates to possess the freezer of Defrost heater.

Background technology

In recent years, development along with the energy-saving of freezer, in order to reduce the consumes power of freezer, the method that has the efficiency of the compressor that makes larger input in order to improve cooling effectiveness to be improved, the defrosting efficiency when being attached to the frost of cooler and melting is improved.

Wherein, as the freezer of prior art that reduces the consumes power of freezer, disclose reduce cooling air duct flowing resistance, improve cooling air quantity to improve the freezer (for example, with reference to patent documentation 1) of cooling effectiveness.In addition, also disclose the freezer (for example, with reference to patent documentation 2) of the thermal convection current while promoting defrosting.

The freezer of above-mentioned prior art is described with reference to accompanying drawing below.

Figure 25 is the side section details drawing around of cooler of existing freezer.As shown in the figure, cooler 1 is arranged between the cooler cover 4 and the interior case 5 of freezer main body of dividing between refrigerating chamber 2 and cooler chamber 3.At the front surface downside of cooler 1, opening has the cold air return port 6 consisting of cooler cover 4.The upper end of the opening of cold air return port 6, it is compared with the lower surface of cooler 1 and is positioned at top, the lower end of the opening of cold air return port 6, it is compared with the below of the lower surface of cooler 1 and is positioned at below.Like this, by increasing the peristome of cold air return port 6, improve the cycle efficieny of cold air, to realize the raising of cooling performance.

In addition, below cooler 1, dispose the white Defrost heater 7 that is attached to cooler 1 for melting.In order to configure Defrost heater 7, the rear side of dividing the separating part 9 of refrigerating chamber 2 and vegetable compartment 8 is formed to concave shape, at the internal configurations Defrost heater 7 of concave shape, thus, do not hinder the flowing of cold air of returning from refrigerating chamber 2 and imported cooler 1, improve heat exchanger effectiveness.

In addition, the open interior at the cold air return port 6 of cooler cover 4, is provided with guide portion 10 upward, and while suppressing from defrosting, the hot-fluid of heated Defrost heater 7 enters refrigerating chamber 2.By making the horizontal direction of relative cooler 1 side of angle of guide portion 10 there is certain angle θ, make successfully to flow into cooler 1 from the cold air that returns of refrigerating chamber 2, improve heat exchanger effectiveness.

According to this structure, by improving the convection current to the mobile cold air of cooler 1, can realize the raising of heat exchanger effectiveness, reduce the power consumption of freezer.

In addition, Figure 26 A, Figure 26 B are the side section details drawings around of cooler of other freezer of prior art.

As shown in the figure, in the refrigerating chamber rear side of freezer, dispose cooler 11 and cover cooler 11 and the cooler cover 12 of formation wind path, below cooler 11, dispose and melt the white Defrost heater 13 that is attached to cooler 11.Upside at Defrost heater 13 disposes the cover heater 14 that covers Defrost heater 13.

Cover heater 14 is configured to, and at fore-and-aft direction, gradient is set, and improves back side end face, makes relative freezer inner side, and it is large that the end face of cover heater 14 of rear side and the interval of back face wall become.Thus, the heat producing from Defrost heater 13 in the time of can making to defrost overleaf thermal wall side rises, and therefore, temperature that can freezing-inhibiting chamber 15 rises.The heat that in addition, can make to be produced by Defrost heater 13 arrives the frost adhering to centered by the pipeline of cooler 11 effectively.In addition, as shown in Figure 26 B, the cold air of refrigerating chamber 15 sides in cooler cover 12 turns cold in refrigerating chamber 15, to declining near Defrost heater, therefore, in the interior generation convection current of cooler cover 12, has and makes the stable effect that defrosts.In addition, for refrigerating chamber 15, form the structure self stashing due to cover heater 14 Defrost heaters 13, while not defrosting, see the situation of the red-hot state of heater.

The freezer of the conventional example shown in Figure 25, the opening of increase cold air return port 6, increases by the air quantity of cooler 1, is improved cooling effectiveness and carries out energy-conservation effect.But, due to the angle of guide portion 10 is fixed with certain angle θ, the Defrost heater that produces about φ 10～20mm is made state that heater is red-hot be seen from the gap between guide portion problem by visible angle.

In addition, there is the tendency of little space, high capacity in freezer industry in recent years, compares equal appearance and size with before approximately 10 years, and freezer inner capacities increases 100L left and right.This is due to the collocation that reduces the idle space of freezer, and improves the heat-proof quality of main body and make the cause of wall thickness thin-walled property.As above-mentioned conventional example, making the separating part back side is concave shape, is configured in separating part, take in Defrost heater 7 in concave shape portion, and idle space increases, and internal volume (inner capacities) reduces.And, in manufacturing the operation of freezer, while making the bonding hard polyurethane foams in the inside of outer container and interior case foam, be easily out of shape, there is the problem of insufficient formability.In addition, be accompanied by the distortion of hard polyurethane foams, when the cooler cover 4 of the peristome that has increased cold air return port 6 is set, the size of uncontrollable cold air return port 6.Thus, thus deposit operability difficulty yield rate when mounted and reduce, occur the problem that peristome area reduces, can not bring into play sufficient cooling effect.

In addition, in the freezer of the conventional example shown in Figure 26 A, Figure 26 B, while there is defrosting by promoting thermal convection current to improve the effect of defrosting efficiency, but due to the gradient of cover heater 14, to the front face side of cooler 11 frost amount increase.During defrosting, centered by the rear side of cooler 11, defrost, therefore, the defrosting of front face side of the cooler 11 that frost amount is many is slow, has delayed whole defrosting time.Its result, thereby the heat of Defrost heater 13 causes the rising of refrigeration storehouse temperature to exerting an influence in freezer, moreover, cooling owing to not carrying out in defrosting time, because the heat from freezer outside is invaded, refrigeration storehouse temperature rises and increases, and has the particularly dysgenic problem to frozen food that occurs.

In addition, cooler 11 is high for energy-conservation contribution degree, in recent years, has by maximizing, increase the way of the surface area of pipe radical, these increase air side of cooling fins, realizes the example of the collocation of energy-saving with low cost.Now, heat during defrosting is owing to covering the periphery convection current of the gradient of heater 14 at cooler 11, but the central part of cooler 11 is difficult to receive convection effects.Therefore, in the cooler 11 of two tubulations, produce effect, but for energy-conservation and when increasing pipe radical and forming three row, be detained thereby occur in central control cryogen the problem that is difficult to defrosting.

The invention provides a kind of jumbo freezer that has suppressed idle space, and there is high cooling capacity thereby the high freezer of energy-efficient performance.

In addition, as the freezer that reduces the consumes power of freezer, disclose by being suppressed at the temperature suppressing in freezer in the air inflow freezer of Defrost heater heating and rise, (for example obtain thus the freezer of energy-saving effect, with reference to patent documentation 3), in addition, disclose by making as far as possible to improve cooling effectiveness from the downside of cold air by cooler that return in freezer, thereby improve the freezer (for example,, with reference to patent documentation 4) of cooling effectiveness.

Below, limit is with reference to the above-mentioned existing freezer of accompanying drawing limit explanation.

Figure 27 is the side section details drawing around of cooler of existing freezer.As shown in the figure, cooler 21 is arranged between the cooler cover 24 and the interior case 25 of freezer main body of dividing between refrigerating chamber 22 and cooler chamber 23.At the downside above of cooler 21, opening has the cold air return port 26 consisting of cooler cover 24.The upper end of the opening of cold air return port 26 is positioned at the top of cooler 21 lower surfaces, and the lower end of the opening of cold air return port 26 is positioned at the below of the lower surface of cooler 21.Like this, by increasing the peristome of cold air return port 26, improve the cycle efficieny of cold air, realize the raising of cooling performance.In the freezer inner side of this cooler cover 24 and the lower opening between cooler 21 sides, be provided with the heating installation inflow space 28 that flows into the air of heating in Defrost heater 27.

In when defrosting, the air being heated by Defrost heater 27 due to in freezer, compare a large amount of inflow heating installation inflow spaces 28, the temperature that can suppress in freezer rises, and, in the time of can reducing defrosting, make the heat energy component warming in freezer, therefore, energy saving improves.

Figure 28 is the side section details drawing around of cooler of existing other freezer.

As shown in the figure, be the freezer of cooler chamber 33 that forms the peripheral passage of air at the refrigerating chamber back side between the refrigerating chamber 32 of being divided by cooler cover 31.In cooler chamber 33, from top configuration fan 34, cooler 35, cover heater 36 and Defrost heater 37.The water acceptance division 38 of the defrost water of being melted by the heat of Defrost heater 37 when bottom surface sections defrosts as reception.In addition, in the bottom of cooler chamber 33 front face side, form the cooler chamber inlet 39 of peripheral passage, at this cooler chamber inlet 39, arranging and making to return cold air is that water acceptance division 38 is towards the pipeline (emissions groove, path, path) 40 of rear side along the bottom surface sections of cooler chamber 33.And the interior case 41 of side overleaf, arranges and makes the guide portion 42 that cold air imports the other formation of cooler front face side of returning that enters along water acceptance division 38.

According to this structure, can make the air-flow that returns in interior case 41 sides at the back side as cooler chamber 33 towards the front face of cooler 35, the major part that makes cold air from the upstream side of cooler 35 by its inside.Therefore, can improve the distribution at the air-flow of cooler 35 internal circulations, can effectively apply cooler 35, realize the raising of cooling effectiveness.

Existing freezer as shown in figure 27, the air in Defrost heater 27 heating while defrosting by inhibition flows in freezer, has the heat energy of reduction to carry out energy-conservation effect.But, cannot avoid the temperature of heating installation inflow space 28 self to rise, therefore, because the heating installation inflow space 28 rising from temperature is received impact to the temperature of dorsal surface in heat conduction, particularly freezer in freezer.Owing to being stored in the food of dorsal surface in freezer, be subject to variations in temperature, thereby have the inner problem that repeats to cause at the approaching state that freezes and melt freshness variation of food when defrosting.

In addition, existing freezer as shown in figure 28, by changing the flow direction that returns to cold air in the 33 interior circulations of cooler chamber, have the efficiency raising that realizes cooler 35, carries out energy-conservation effect.But, owing to being provided with for changing the pipeline 40 of the wind direction that returns to cold air, increasing the flowing resistance of sucting, whole air quantity declines.Its result, causes by the decline of the air circulation of cooler 35, and as a result of, existence can not be brought into play the problem of sufficient cooling effect.

In addition, due to pipeline 40 be disposed at Defrost heater 37 above near, the heating of the Defrost heater 37 during due to defrosting is subject to temperature impact.The heating of the Defrost heater 37 during due to defrosting, the surface of Defrost heater 37 probably rises to 300 ℃ of left and right Celsius.Its result, the surface that is arranged near the pipeline 40 of Defrost heater 37 also rises to general Celsius more than 100 ℃, therefore, in order to prevent that distortion that heat causes need to be with the parts of metal covering surfaces such as aluminium foil etc., the problem that exists the cost in fee of material and man-hour to rise.

The invention reside in provides that a kind of to improve efficiency, the energy-efficient performance in cooling effectiveness and when defrosting high, and has suppressed the jumbo freezer of idle space.

Prior art document

Patent documentation

Patent documentation 1: TOHKEMY 2007-71487 communique

Patent documentation 2: TOHKEMY 2011-127850 communique

Patent documentation 3: TOHKEMY 2010-60188 communique

Patent documentation 4: TOHKEMY 2011-89718 communique

Summary of the invention

Freezer of the present invention possesses the refrigerating chamber of the cryogenic temperature band in freezer main body and freezer.And possess cooler chamber, this cooler chamber have be arranged at refrigerating chamber cooler rear side, that generate cold air, be arranged at cooler below Defrost heater and be positioned at Defrost heater below and possess being attached to that the frost of cooler melts and the drain pan that the defrost water that falls receives.Also possesses the cooler cover that covers cooler and there is the cold air return port that the cold air for making refrigerating chamber cooling returns to cooler.The center of Defrost heater is positioned at the top of refrigerating chamber lower surface in the horizontal direction, at refrigerating chamber lower surface, disposes to side-prominent protrusion member in freezer, and the upper end of cold air return port lower end and protrusion member is overlapping in short transverse.

Thus, the present invention is by the lap of cold air return port lower end and protrusion member is set, and from the red-hot state of Defrost heater, to outside, reveals can prevent from defrosting time.In addition, by cold air return port lower end and protrusion member devices spaced apart, from freezer to cooler return to that cold air can be guaranteed not only before return port and also in the convection current of cooler downside.Therefore, the heat exchange area in cooler can be increased, and the flowing resistance of returning to cold air can be reduced, thus, can increase air circulation, increase the heat exchange amount in cooler, make evaporating temperature increase, improve cooling cycle efficiency, thereby can realize energy-conservation.

In addition, by improving the heat exchange amount of cooler and increasing air circulation, can reduce the time in cooling refrigeration storehouse, therefore, can also by shorten cooling running time and reduce to cooler frost amount.Thus, can extend the defrosting cycle regularly carrying out in order to melt the frost of cooler, in the freezer of realizing the input number of times minimizing of Defrost heater and defrosting after the refrigeration storehouse temperature rising causing, cooling needed electric power input minimizing, can further carry out energy-conservation.

In addition, increasing the heat exchange area of cooler by the improvement of wind path, is to increase at cooler the area of frost.Now, can improve from freezer to the flowing of cooler, can make cooler frost become cooler equably frost, therefore, the deterioration of cooling capacity in the time of can suppressing frost.Thus, can extend as operation freezer until need the defrosting cycle of the time of defrosting, in the freezer of realizing the input number of times minimizing of Defrost heater and defrosting after the refrigeration storehouse temperature rising causing, cooling needed electric power input minimizing, can further carry out energy-conservation.

Freezer of the present invention possesses: cooler rear side, that generate cold air that is arranged at refrigerating chamber; Be arranged at the Defrost heater of the below of cooler; With cover cooler and there is the cooler cover of the cold air return port that the cold air for making refrigerating chamber cooling returns to cooler.Cooler cover consists of the cooler front side cover of freezer inner side and the cooler rear side cover of cooler side, in cooler the place ahead, possess by cooler front side cover and the hood-shaped heat transfer becoming of cooler rear side and suppress space, at cold air return port, be provided with the heating installation guide member that defrosts.

Thus, by the effect of defrosting heating installation guide member, can easily at cooler, carry out the convection of heat of Defrost heater, thereby can improve defrosting efficiency, and can shorten defrosting time, realize energy-conservation.In addition, the temperature of non-cooling running time while defrosting by shortening rises and suppresses and prevent that heating installation from flowing in freezer, not only can realize energy-conservation in reducing of cooling load amount, and can reduce the temperature change to food, therefore, thus can suppress freshness and worsen realize long-term preservation.

In addition, utilizing conducts heat suppresses space, when when defrosting, cooler temperature around rises, can suppress to the heat transfer in freezer, therefore, particularly can reduce being stored in the temperature impact of the food of depth portion in storehouse, thereby therefore can suppress freshness deterioration, realize long-term preservation.

Accompanying drawing explanation

Fig. 1 is the stereogram of the freezer of the first embodiment of the present invention.

Fig. 2 is the profilograph of the freezer of the first embodiment of the present invention.

Fig. 3 is the profilograph of cooler periphery of the freezer of the first embodiment of the present invention.

Fig. 4 is the vertical section details drawing of cooler periphery of the freezer of the first embodiment of the present invention.

Fig. 5 is the resistance curve figure of cold wind Air Blast fan of the freezer of the first embodiment of the present invention.

Fig. 6 is the vertical section details drawing of cooler periphery of the freezer of the second embodiment of the present invention.

Fig. 7 is the vertical section details drawing of cooler periphery of the freezer of the 3rd embodiment of the present invention.

Fig. 8 is the vertical section details drawing of cooler periphery of the freezer of the 4th embodiment of the present invention.

Fig. 9 is the stereogram of the freezer of the 5th embodiment of the present invention.

Figure 10 is the profilograph of the freezer of the 5th embodiment of the present invention.

Figure 11 is the profilograph of cooler periphery of the freezer of the 5th embodiment of the present invention.

Figure 12 is the vertical section details drawing of cooler periphery of the freezer of the 5th embodiment of the present invention.

Figure 13 is the resistance curve figure of cold wind Air Blast fan of the freezer of the 5th embodiment of the present invention.

Figure 14 is the vertical section details drawing of cooler periphery of the freezer of the 6th embodiment of the present invention.

Figure 15 is the vertical section details drawing of cooler periphery of the freezer of the 7th embodiment of the present invention.

Figure 16 is the vertical section details drawing of cooler periphery of the freezer of the 8th embodiment of the present invention.

Figure 17 is the stereogram of the freezer of the 9th embodiment of the present invention.

Figure 18 is the profilograph of the freezer of the 9th embodiment of the present invention.

Figure 19 is the profilograph of cooler periphery of the freezer of the 9th embodiment of the present invention.

Figure 20 is the vertical section details drawing of cooler periphery of the freezer of the 9th embodiment of the present invention.

Figure 21 is the resistance curve figure of cold wind Air Blast fan of the freezer of the 9th embodiment of the present invention.

Figure 22 is the vertical section details drawing of cooler periphery of the freezer of the tenth embodiment of the present invention.

Figure 23 is the back view of cooler cover of the freezer of the tenth embodiment of the present invention.

Figure 24 is the key diagram of basic heat exchange department of cooler of the freezer of the tenth embodiment of the present invention.

Figure 25 is the side section details drawing of freezer cooler periphery of the freezer of explanation prior art.

Figure 26 A is the side section details drawing of cooler periphery of freezer of the freezer of explanation prior art.

Figure 26 B is the side section details drawing of cooler periphery of freezer of the freezer of explanation prior art.

Figure 27 is the side section details drawing of cooler periphery of freezer of the freezer of explanation prior art.

Figure 28 is the side section details drawing of cooler periphery of freezer of the freezer of explanation prior art.

The specific embodiment

Below, in reference to accompanying drawing, embodiments of the present invention are described.In addition, the present invention is not limited by this embodiment.

(the first embodiment)

Below, use accompanying drawing to be elaborated to embodiments of the present invention.

Fig. 1 is the stereogram of the freezer of the first embodiment of the present invention.Fig. 2 is the profilograph of the freezer of the first embodiment of the present invention.Fig. 3 is the profilograph of cooler periphery of the freezer of the first embodiment of the present invention.Fig. 4 is the vertical section details drawing of cooler periphery of the freezer of the first embodiment of the present invention.

As shown in Figures 1 to 4, freezer main body 101 (for example has forwardly the metal system of opening, iron plate) outer container 124, the hard resin system (insulated body 126 that for example, interior case 125 ABS) and foam filled hard polyurethane foams between outer container 124 and interior case 125 form.This freezer main body 101 possesses be arranged at the refrigerating chamber 102 on top, the ice-making compartment 104 that is arranged at the upper strata refrigerating chamber 103 under refrigerating chamber 102 and is set up in parallel with upper strata refrigerating chamber 103 under refrigerating chamber 102.In addition, freezer main body 101 also possesses the vegetable compartment 106 of the lower body part of being arranged at and is arranged at the upper strata refrigerating chamber 103 that is set up in parallel and the lower floor's refrigerating chamber 105 between ice-making compartment 104 and vegetable compartment 106.Upper strata refrigerating chamber door 103a, ice-making compartment door 104a, lower floor refrigerating chamber door 105a and the vegetable compartment door 106a of the front face of upper strata refrigerating chamber 103, ice-making compartment 104, lower floor's refrigerating chamber 105 and vegetable compartment 106 by pull-out type (drawing and pulling type, drawer type) opens and closes freely and is closed (closing).The refrigerating-chamber door 102a by opposite opened above of refrigerating chamber 102 opens and closes freely and is closed.

For the temperature of refrigerating chamber 102, for stored refrigerated and to take the temperature not freezing be lower limit, be conventionally set to 1 ℃～5 ℃.The temperature of vegetable compartment 106 is set to 2 ℃～7 ℃ of the Temperature Setting equal or slightly high with refrigerating chamber 102 mostly.If be set to low temperature, can maintain for a long time the freshness of leaf vegetables (vegetables).

The temperature of upper strata refrigerating chamber 103He lower floor refrigerating chamber 105, for freezing preservation, is set to-22 ℃ to-18 ℃ conventionally, but in order to improve freezing preservation state, for example, is sometimes also set to the low temperature of-30 ℃ to-25 ℃.

Because refrigerating chamber 102 and vegetable compartment 106 are set to positive temperature in freezer, therefore, be called refrigerated storage temperature band.In addition, because upper strata refrigerating chamber 103, lower floor's refrigerating chamber 105, ice-making compartment 104 are set to negative temperature in freezer, therefore, be called cryogenic temperature band.In addition, upper strata refrigerating chamber 103 also can be used as switching chamber, by using air door (damper) mechanism etc., as the chamber that can select to take to from refrigerated storage temperature cryogenic temperature band.

The top part of freezer main body 101,, consists of the first top part 108 and the second top part 109 with step-like and be provided with recess towards the back side of freezer direction.With step-like the second top part 109 that is provided with recess, be provided with Machine Room 119.By be disposed at the Machine Room 119 of this step-like recess compressor 117, carry out the drier that moisture removes (without diagram), condenser (without diagram), the radiating tube (without diagram) of heat transmission, capillary 118, cooler 107 and enclose cold-producing medium in being sequentially connected to the freeze cycle of ring-type, carry out cooling running.For cold-producing medium, in recent years, for environmental protection, mostly use combustible refrigerant.In addition,, when using the freeze cycle of triple valve or transfer valve, also can in Machine Room 119, set these functional parts.

In addition, refrigerating chamber 102 is divided by the first heat insulation separating part 110 with ice-making compartment 104 and upper strata refrigerating chamber 103.In addition, ice-making compartment 104 is divided by the second heat insulation separating part 111 with upper strata refrigerating chamber 103.In addition, ice-making compartment 104 and upper strata refrigerating chamber 103Yu lower floor refrigerating chamber 105 are divided by the 3rd heat insulation separating part 112.

The parts that the second heat insulation separating part 111 and the 3rd heat insulation separating part 112 are assembled afterwards for the foaming of freezer main body 101, therefore, usually used as heat-barrier material, are used expanded polystyrene (EPS), in order to improve heat-proof quality and rigidity, also can use hard polyurethane foams.In addition, as the second heat insulation separating part 111 and the 3rd heat insulation separating part 112, insert the vacuum heat insulation material (Vacuumed insulation panel) of high thermal insulation, can realize the further slimming of separation structure.

In addition, by guaranteeing that the running portion of doorframe carries out slimming and the abolishment of the shape of the second heat insulation separating part 111 and the 3rd heat insulation separating part 112, cooling air duct can be guaranteed, the raising of cooling capacity can be realized.In addition, by the inside of scratching except (connection) second heat insulation separating part 111 and the 3rd heat insulation separating part 112, become wind path, and when can reduce along with material, realize the reduction of cost.

In addition, lower floor's refrigerating chamber 105 and vegetable compartment 106 are divided by the 4th heat insulation separating part 113.

The structure of cooler periphery in present embodiment then, is described.

At the back side of freezer main body 101, be provided with cooler chamber 123, in cooler chamber 123, comprise as the second heat insulation separating part 111 of heat insulation partition wall and the rear area of the 3rd heat insulation separating part 112, at the back side of lower floor's refrigerating chamber 105 above-below direction be lengthways equipped with as representational fin tube type for generating the cooler 107 of cold air.

Before cooler chamber 123, dispose the cooler cover 120 that aluminium or copper is material of take that covers cooler 107, cooler cover 120 possesses the cold air return port 135 that cold air for making lower floor's refrigerating chamber 105 cooling is back to cooler.

At the cold air return port 135 that is arranged at the bottom of cooler cover 120, be provided with wind direction guide portion 122.This wind direction guide portion 122 be spaced apart 5mm more than, guarantee to prevent the intrusion of finger and the intensity of mould and cooler cover 120.

(for example upper space) near cooler 107 dispose utilize forced convertion mode by the cold air being generated by cooler 107 to the cold air Air Blast fan 116 of blowing in each storeroom of refrigerating chamber 102, ice-making compartment 104, upper strata refrigerating chamber 103, lower floor's refrigerating chamber 105, vegetable compartment 106.Below cooler 107, be provided with and be attached to the Defrost heater being formed by Glass tube heater 132 that the frost of cooler 107, cold air Air Blast fan 116 defrosts when cooling.Above the Defrost heater 132 being formed by Glass tube heater, dispose the cover heater 133 that covers Defrost heater 132.Cover heater 133 forms glass caliber and the equal above size of width with Defrost heater 132, make by the water droplet process defrosting that makes to drip from cooler 107, to be directly dropped in and to become the glass tube of high temperature surface when defrosting, and do not send the sound of ticktack ticktack.

Below Defrost heater 132, dispose being attached to that the frost of cooler 107 melts and the defrost water that falls receives, form as one with the upper surface of the 4th heat insulation separating part 113 as refrigerating chamber lower surface drain pan (drain pan) 134.

Herein, the drain pan 134 forming as one at the upper surface with the 4th heat insulation separating part 113, disposes to side-prominent protrusion member 136 in freezer at refrigerating chamber lower surface.In addition, protrusion member 136 is disposed between the lower end and Defrost heater 132 of cold air return port 135.Thus, cannot see towards red-hot (red heat) in freezer, and when seeing from freezer inner side, protrusion member 136 is hidden in the cold air return port lower end of cooler cover 120, therefore, contributes to good outward appearance, and exterior quality is improved.

The center configuration of Defrost heater 132 is in the position more closer to the top than the upper surface of the 4th heat insulation separating part 113.Thus, can make the approximate horizontal that is shaped as of the drain pan 134 that forms as one with refrigerating chamber lower surface, reduce for the idle space of Defrost heater 132 is set, can realize the increase of internal volume.In addition, can make the degree of depth of drain pan 134 shoal, the die cost in the time of can suppressing component parts moulding, therefore, also contributes to the reduction of cost.In addition, the distortion when insulated body 126 that also can suppress that the bonding hard polyurethane foams in the inside of the outer container 124 with freezer main body 101 and interior case 125 is formed foams, improve goods yield rate, reduce abandonment charge, and the operability while installing is also improved, therefore, can provide the freezer that exterior quality is good.

, as the cold-producing medium of freeze cycle in recent years, from earth environment, save the viewpoint of (environmental protection) from damage herein, use the little iso-butane as combustible refrigerant of greenhouse effects of the earth coefficient.Iso-butane as this hydrocarbon is compared with air, is the proportion (in 2.04,300K) of approximately 2 times under normal temperature, atmospheric pressure.Thus, compared with prior art, can reduce the loading of cold-producing medium, realize low cost, and the amount of leakage when making combustible refrigerant just in case occurring to reveal reduces, and can further improve security.

In present embodiment, cold-producing medium is used iso-butane, as explosion-proof countermeasure, and the maximum temperature on the glass tube surface of the gabarit of the Defrost heater 132 while having stipulated as defrosting.In order to reduce the temperature on glass tube surface, Defrost heater 132 adopts the dual Glass tube heater that glass tube is formed to dual structure.In addition, as the method that reduces the temperature on glass tube surface, also can for example, at the high parts (, aluminium fin) of glass tube surface coiling thermal diffusivity.Now, by making glass tube, be substance structure, can reduce the appearance and size of Defrost heater 132.

As the means that improve defrosting efficiency, also can be outside the Defrost heater 132 being formed by Glass tube heater, and use the pipe heater that connects airtight (bonding) with cooler 107.Now, by the direct heat transfer from pipe heater, carry out efficiently the defrosting of cooler 107.Can simultaneously with Defrost heater 132, melt the drain pan 134 of the surrounding that is attached to cooler 107 and the frost of cold air Air Blast fan 116, therefore, can realize the shortening of defrosting time, realize energy-conservationly, suppress the rising of the refrigeration storehouse temperature in defrosting time.

In addition,, when the Defrost heater 132 that combination consists of Glass tube heater and pipe heater, by making mutual suitableization of heater capacity, can reduce the capacity of Defrost heater 132.In the time can reducing heater capacity, also can reduce the temperature of gabarit of the Defrost heater 132 in when defrosting, therefore, red-hot in the time of also can suppressing to defrost.

Then, the cooling of freezer is described.For example, lower floor's refrigerating chamber 105, due to the intrusion heat from outer gas and door switch etc., causes refrigerating storehouse temperature and rises, and refrigerating chamber sensor (without diagram) reaches start-up temperature when above, and compressor 117 startups, begin to cool down.The cold-producing medium of the HTHP of discharging from compressor 117, be disposed at the drier (without diagram) of mechanical type 119 in final arrival during, particularly in being arranged at the radiating tube of outer container 124 (without diagram), the heat exchange of outside air and the insulated body consisting of hard polyurethane foams 126 in freezer by outer container 124, is cooled and liquefies.

Then, the cold-producing medium of liquefaction is reduced pressure by capillary 118, flows into cooler 107, carries out heat exchange with air in the freezer of cooler 107 peripheries.Cold air after heat exchange is sent to cold air by near cold air Air Blast fan 116 in freezer, makes in freezer cooling.Afterwards, cold-producing medium is heated, gasifies, and gets back to compressor 117.In freezer, be cooled, the temperature of refrigerating chamber sensor (without diagram) arrives and stops temperature when following, and compressor 117 shuts down.

Cold air Air Blast fan 116 is also directly equipped on interior case 125 sometimes, but processes by being equipped on the foaming piece that the second heat insulation separating part 111 of assembling carries out parts afterwards, can realize the reduction of manufacturing cost.

Situation during then, to the defrosting of freezer describes.

Make freezer carry out cooling running, through after a while, and because of the airborne moisture of invading when the door switch, the moisture that is attached to the food of putting into freezer, also have from the moisture etc. that is stored in the vegetables of vegetable compartment 106, at cooler 107, be attached with frost.Along with the growth of this frost, between cooler 107 and circulation cold air, heat exchanger effectiveness reduces, can not be by fully cooling in freezer, and finally in cold state not.Therefore,, in freezer, need to regularly remove the frost that is attached to cooler.

Freezer in present embodiment, turns round, after certain hour, automatically defrosts at freezer.When defrosting, stop the running of compressor 117, cold air Air Blast fan 116, to Defrost heater 132 energisings that formed by Glass tube heater.Cooler 107 is owing to being stranded in the cold-producing medium and white the melting that is attached to cooler 107 of cooler 107 inside, about through the sensible heat variation of-30 ℃ to 0 ℃, the latent heat variation of 0 ℃, from the sensible heat variation of 0 ℃ and intensification gradually.In cooler 107, defrosting sensor (without diagram) is installed, if reach the energising that set point of temperature stops Defrost heater 132 herein.In the present embodiment, Defrost heater stops the energising of Defrost heater 132 in the moment that detects 10 ℃.

Now, by the energising of Defrost heater 132, glass tube surface reaches a high temperature, by utilizing radiant heat to melt to be attached to the drain pan 134 of surrounding of cooler 107, cooler cooler 107 around, the frost of cold air Air Blast fan 116, thus, make cooler 107 obtain recovery (updating maintenance, refresh).

In addition, for example, in the low outer gas of 5 ℃ of left and right, even the frost of cooler 107 is defrosted fully, also can be due to the impact of outer gas, the temperature of the sensor that makes to defrost is difficult to heat up fully, has the elongated trend of defrosting time.Now, also can combine and observe 0 ℃ of above sensible heat variable condition, if finish through above after a while the control that defrosts.Thus, thus can suppress in low outer gas the cooler 107 irrelevant with defrosting fully heat up not enoughly cause elongated, the unnecessary heater input of defrosting time, the cooling intensification that stops causing during because of the photothermal intensification in freezer and defrosting.

To the freezer forming as mentioned above, in following its action of explanation and effect.

From easy to use and energy-conservation viewpoint, can use suitably present embodiment such below vegetable compartment 106 is set, lower floor's refrigerating chamber 105 is set in middle, the layout structure of the freezer of refrigerating chamber 102 is set up.In addition, from viewpoint easy to use, also provide the freezer that forms the structure of the standard-sized sheet mechanism of drawer scope in the storehouse that increases lower floor's refrigerating chamber 105 and vegetable compartment 106.

Now, during by the drawer scope standard-sized sheet of lower floor's refrigerating chamber 105, can see the cooler cover 120 that prior art is difficult to see due to the back side of freezer inner housing and the cold air return port 135 that is positioned at the bottom of cooler cover 120.

Wherein, in present embodiment, at the lower surface of refrigerating chamber, dispose to side-prominent protrusion member 136 in freezer.Structure in key diagram 3 and Fig. 4, the upper surface of the 4th heat insulation separating part 113 of take is benchmark, establishes until the distance of the lower end of cold air return port 135 is that A is until the height of protrusion member 136 upper surfaces is that B is until the distance at Defrost heater 132 center is C.Make the lap (overlapping range) of the lower end of cold air return port 135 and the short transverse of protrusion member 136 for more than 0mm.That is, be the relation of A≤B.Now, if the relation of A >=C, B >=A >=C, can cannot see Defrost heater 132 red-hot of the next free Glass tube heater formation in when defrosting, therefore, while opening refrigerating chamber door when the defrosting of freezer, can to user, not produce uneasy sense due to the red-hot of Defrost heater 132.

In addition, establishing the lower end of cold air return port 135 and the space length between protrusion member 136 is D, and in present embodiment, making to close is B≤D.Thus, from in freezer to the convection current that cold air not only can be guaranteed wind direction guide portion 122 parts above of cold air return port 135 of returning of cooler 107, also can guarantee from the convection current of the downside in freezer, therefore, increase the area that passes through that returns to cold air, further descensional ventilation resistance.Its result, can increase air circulation, is increased in heat exchange amount in cooler 107 and makes evaporating temperature increase, and the raising by freezing efficiency can realize energy-conservation.

In addition, the raising of heat exchange amount and the increase of air circulation by cooler 107, can reduce the time in cooling refrigeration storehouse, therefore, also can reduce by the shortening of the cooling duration of runs to cooler 107 frost amount.Thus, can extend the defrosting cycle of cooler 107, the interior cooling needed electric power input minimizing of freezer that realizes the input number of times minimizing of Defrost heater and defrost after the refrigeration storehouse temperature rising causing, can further carry out energy-conservation.

In addition, the heat exchange area that the improvement by wind path increases cooler 107 be increase can be at cooler 107 area of frost, therefore, the deterioration of the cooling capacity in the time of can suppressing frost.Thus, can extend as operation freezer until need the defrosting cycle of the time of defrosting, in the freezer of realizing the input number of times minimizing of Defrost heater 132 and defrosting after the refrigeration storehouse temperature rising causing, cooling needed electric power input minimizing, can further carry out energy-conservation.

In addition,, if reduce flowing resistance, when cold air Air Blast fan 116 is same fan voltage, air circulation increases.The performance plot that represents flowing resistance and air quantity in Fig. 5.As shown in Figure 5, in the cooling performance of freezer, according to the characteristic of fan, flowing resistance is reduced to a little 1 → P1 → P2 of 2 air circulation increase to Q1 → Q2.

In addition, in the time of can guaranteeing performance with same air quantity, by reducing the rotation speed of the fan of cold air Air Blast fan 116, can access same air quantity.Now, characteristic moves for point 2 → 3, and the input of rotation speed of the fan sloping portion reduces, can be energy-conservation as electricity input.In addition, by rotation speed of the fan, reduce, can realize the reduction of the sound of the wind of cold air Air Blast fan 116, therefore, even in the low quiet environment of the ambient noises such as night, also can not notice noise.

In addition, in present embodiment, for limit cold air return port 135 shape, guarantee aperture area, protrusion member 136 is contacted with the periphery of cooler cover 120 that forms the lower end of cold air return port 135.

Thus, can increase cold air return port 135 and the periphery of holding yielding cold air return port 135 during opening is fixed, therefore, can limit the size of cold air return port 135, guarantee peristome area, bring into play sufficient cooling effect.In addition, during installation, operator makes cooler cover 120 be connected to protrusion member 136 by mark protrusion member 136 to operate, can improve operability and realize the shortening of operating time.Therefore, can make goodization of yield rate, suppress product deviation, can guarantee stable cooling performance.

In addition, protrusion member 136 is consisted of the upper surface of the 4th heat insulation separating part 113, can reduce fee of material and the model expense of making protrusion member 136, and can reduce the step of manufacturing process.In addition, because the management of 2 parts of the upper surface from protrusion member 136 and the 4th heat insulation separating part 113 becomes the management of 1 parts, therefore, can reduce administrative expenses, realize the cost that forms goods, can contribute to the reduction of selling price, with the raising of enforcement sale rate.

Now, the part of the protrusion member 136 contacting for the periphery with cooler cover 120, the height dimension of establishing the periphery of cooler cover 120 is E, if B≤E cannot see red-hot in freezer.Now, the width dimensions of protrusion member 136 or the protrusion member 136 while consisting of the upper surface of the 4th heat insulation separating part 113 does not need to increase the width in freezer, can be positioned at a plurality of positions.Thus, the yield rate in the time of can realizing the reduction of fee of material and parts and manufacture improves.

In addition, wind direction guide portion 122 shapes in the cold air return port 135 in present embodiment are described.

Wind direction guide portion 122 forms from freezer inner side (inside-of-refrigerator) shape that aerator side extends that supports or opposes, and makes wind direction guide portion 122 from returning to top elongated in Defrost heater 132 sides to the shape of wind direction guide portion 122 of returning to bottom.

Thus, not only make the flowing resistance of cold air return port 135 reduce, realize the raising of cooling capacity, the effect that the heating installation in freezer that the radiant heat of the Defrost heater 132 in the time of can easily suppressing in addition from defrosting causes flows into.If can reduce heating installation flows into, the rising of the refrigeration storehouse temperature in the time of can suppressing to defrost, in cooling after defrosting finishes, make low input, the refrigeration storehouse temperature in the short time be restored to possibility, it is deteriorated that the variations in temperature that can suppress food suppresses food quality, thereby can preserve for a long time.Can further realize energy-conservation.

In addition, the inner of wind direction guide portion 122 (top wind direction guide portion) that makes to be positioned at top is than each inner line coupling together with Defrost heater 132 center of wind direction guide portion 122 is positioned to higher position.

Thus, when in freezer, (in storehouse) seen, each wind direction guide portion 122 is overlapping with respect to Defrost heater 132, therefore, and when the defrosting of freezer, even if also cannot see the red-hot state of Defrost heater 132 when opening the door of refrigerating chamber.In addition, also there is the radiant heat from Defrost heater 132 while suppressing defrosting to flow into the effect in freezer, have the effect of the temperature rising that can suppress in freezer.Now, by each wind direction guide portion 122, the current of warm air that heat during defrosting causes, to cooler side, therefore, is realized the raising of defrosting efficiency, also realizes defrosting time and shortens the energy-saving effect bringing.

In addition, the inhibition flowing into for heating installation in freezer, prevent in freezer frost be also effective.If the heating installation in freezer flows into too much, particularly to become with the part being communicated with in freezer and freezer inner top surface frost significantly occur, while having long-term use, when defrosting after a while and at every turn, that frost part is dripped and the possibility of falling freezer inner housing.According to the shape of present embodiment, the inhibition that realization flows into the heating installation in freezer, therefore, general more than 10 years even if freezer is used, also can prevent the reliability decrease that frost causes, high-quality freezer can be provided.

In addition, wind direction guide portion 122 from from the wind direction guide portion 122 on cold air return port top to cold air return port bottom, the shape that makes to connect freezer inner side (side in storehouse) connecting line of end face and the pattern draft at the inner housing back side, storehouse (draw taper, draft angle, go out modular angle (draft angle), withdrawing pattern) is parallel, therefore, can make being spaced apart of storehouse inner housing and cold air return port 135 certain more than, local narrowing down not, because the air quantity that the flowing resistance increase of wind path causes does not decline.Therefore, can not cause the decline of cooling capacity.

In addition, in high capacity trend in recent years, increase as much as possible storehouse inner housing (freezer inner housing), contribute to the raising of sale, the pattern draft while making moulding storehouse inner housing is parallel with the line of the freezer inner side end of connection wind direction guide portion 122.Therefore, can when the moulding of storehouse inner housing, realize that to have cut down the actual content to greatest extent of idle space long-pending, and when high capacity, wind direction guide portion 122 not with storehouse inner housing butt, therefore, when being used, reality there will not be storehouse inner housing to be connected to slight crack and contact sound that wind direction guide portion 122 occurs.

In addition, it is more than 60mm making the end face of Defrost heater 132 sides of wind direction guide portion 122 and the beeline of the glass tube gabarit of Defrost heater 132.Thus, the temperature that can suppress the cooler cover 120 self of the formation cold air return port 135 that causes from the radiant heat of Defrost heater 132 due to when defrosting rises, therefore, even the distortion that the temperature impact that does not also occur to be caused by radiant heat when when defrosting etc. excessively extends defrosting time causes.In addition, owing to making beeline, be more than 60mm, therefore, during defrosting from the current of warm air of Defrost heater 132 to cooler side, have and easily suppress the effect that flows in freezer.

In addition, in present embodiment, the kind of cold-producing medium is used to iso-butane, therefore, the temperature on the glass tube surface of the Defrost heater 132 during defrosting is defined as Celsius below 394 ℃.In addition, the PP (polypropylene) of the cooler cover 120 using in present embodiment and the materials'use cheapness of wind direction guide portion 122, the heat-resisting melting temperature of PP is approximately 200 ℃ Celsius, ignition temperature is approximately 440 ℃ Celsius.But, consider actual use, heat resisting temperature is set as to 135 ℃ Celsius.That is, consider worst case, calculate glass tube surface temperature and be 394 ℃ Celsius, materials'use PP, heat resisting temperature and be 135 ℃ of sizes when following Celsius, it is more than 60mm making above-mentioned beeline.In above-mentioned calculating, according to this special fence-Boltzmann law (this special fence law, stefan-boltzmann law), derive.

(the second embodiment)

As shown in Figure 6, have and be arranged at the back side of freezer main body, the cooler 157 of generation cold air; Be arranged at the below of cooler 157, the Defrost heater 182 being formed by Glass tube heater.Below Defrost heater 182, be provided with being attached to that the frost of cooler 157 melts and the defrost water that falls receives, form as one with refrigerating chamber lower surface drain pan 184.In the bottom that covers the cooler cover 170 of cooler 157, possesses the cold air return port 185 that the cold air for making refrigerating chamber 155 cooling returns to cooler 157.The center configuration of Defrost heater 182 is in be positioned at more top than the upper surface of the 4th heat insulation separating part 163 of the lower surface of refrigerating chamber 155.

In the present embodiment, the lower surface at refrigerating chamber 155 disposes to freezer inner side (side in storehouse) outstanding protrusion member 186.Wherein, the upper surface of the 4th heat insulation separating part 163 of take is benchmark, establishes until the distance of the lower end of cold air return port 185 is that A is until the height of protrusion member 186 upper surfaces is that B is until the distance at Defrost heater 182 center is C1., be the relation of A≤B and the lap (overlapping range) that makes the lower end of cold air return port 185 and the short transverse of protrusion member 186 is for more than 0mm.Now, relation for A≤C1, C1 >=B >=A, the red-hot state from Defrost heater 182 in the time of can cannot see defrosting, therefore, while opening refrigerating chamber door when the defrosting of freezer, can to user, not produce uneasy sense due to the red-hot state of the Defrost heater 182 forming because of Glass tube heater.

(the 3rd embodiment)

As shown in Figure 7, have and be arranged at the back side of freezer main body, the cooler 207 of generation cold air; Be arranged at the below of cooler 207, the Defrost heater 232 being formed by Glass tube heater.Below Defrost heater 232, be provided with being attached to that the frost of cooler 207 melts and the defrost water that falls receives, form as one with refrigerating chamber lower surface drain pan 234.In the bottom that covers the cooler cover 220 of cooler 207, possesses the cold air return port 235 that the cold air for making refrigerating chamber 205 cooling returns to cooler 207.At cold air return port 235, be provided with wind direction guide portion 222, Defrost heater 232 center is configured in the top of the upper surface of the 4th heat insulation separating part 213.In addition, at the lower surface of refrigerating chamber 205, dispose to side-prominent protrusion member 236 in freezer.

In the present embodiment, by this protrusion member 236 and cooler cover 220 are formed as one, contact and fix with the contact site (without diagram) of the lower surface of refrigerating chamber 205, and cannot see red-hot in freezer.In addition, can increase cold air return port 235 and the periphery of holding yielding cold air return port 235 during opening is fixed, therefore, can limit the size of cold air return port 235, guarantee peristome area, bring into play sufficient cooling effect.In addition, during installation, operator is connected to contact site by contact site by mark and operates, and can improve operability and realize the shortening of operating time.Therefore, can make goodization of yield rate, suppress product deviation, can guarantee stable cooling performance.

(the 4th embodiment)

Fig. 8 is the detailed cross sectional view of cooler chamber of the freezer of the 4th embodiment of the present invention.

As shown in Figure 8, have and be arranged at the back side of freezer main body, the cooler 257 of generation cold air; Be arranged at the below of cooler 257, the Defrost heater 282 being formed by Glass tube heater.Below Defrost heater 282, be provided with being attached to that the frost of cooler 257 melts and the defrost water that falls receives, form as one with refrigerating chamber lower surface drain pan 284.In the bottom that covers the cooler cover 270 of cooler 257, possesses the cold air return port 285 that the cold air for making refrigerating chamber 255 cooling returns to cooler 257.At cold air return port 285, be provided with wind direction guide portion 272, Defrost heater 282 center is configured in the top of the upper surface of the 4th heat insulation separating part 263.In addition, the lower surface at refrigerating chamber 255 disposes to freezer inner side (side in storehouse) outstanding protrusion member 286.

Above Defrost heater 282, dispose the cover heater 283 that covers Defrost heater 282.Cover heater 283 forms glass caliber and the equal above size of width with Defrost heater 282, make by the water droplet process defrosting that makes to drip from cooler 257, to be directly dropped in and to become the glass tube of high temperature surface when defrosting, and do not send the sound of ticktack ticktack.

In present embodiment, cover heater 283 is configured at fore-and-aft direction gradient is set, and becomes the structure of end face that improves the cover heater 283 of rear side with respect to freezer inner side.In addition, in cooler 257, so that the pattern of pipe is staggered, the mode that cooling tube tilts to freezer inner side is installed cooler 257.

When cooling running, from cold air return port 285, via wind direction guide portion 272, turn back to the cold air of cooler 257, along the inclination of covering heater 283, easily flow to cooler 257 sides.Therefore, cold air is difficult for rotational flow around Defrost heater 282.Thus, because return to cold air, flow to efficiently smoothly cooler 257, so realize the raising of heat exchanger effectiveness, cooling capacity is improved.Its result, can provide the freezer of energy saving excellence.

In addition, when defrosting, in the prior art, to the front face side of cooler 257 frost amount increase, therefore, by making to cover the defrosting at the rear side center that heater 283 tilts, the defrosting of the cooler front face side more than frost amount is slow, the problem that exists whole defrosting time to extend.

In present embodiment, do not use the cooler of in-line arrangement pipe pattern of the prior art, and use the cooler 257 of staggered pipe pattern.The mode tilting to freezer inner side with pipe is installed the cooler 257 of alternating expression pipe pattern, and therefore, heating installation during defrosting is tilted to freezer flows inside by pipe.In addition, the size of cover heater 283 is formed and the glass caliber and the equal above size of width that form Defrost heater 282, therefore not in freezer inner side, cover the degree of Defrost heater 282, the heating installation that is configured to Defrost heater 282 also flows to cooler 257 from freezer inner side.

Thus, not that cooler 257 is partly defrosted, can to integral body, defrost efficiently, therefore, the problem that does not exist slack-off, the whole defrosting time of the part of defrosting to extend.Its result, can be not yet heat affecting in 282 pairs of freezers of Defrost heater during due to defrosting cause the excessive rising of refrigeration storehouse temperature.

That is, thus can provide not and can cause because of inhomogeneous the frost of cooler 257 prolongation, the cooling performance of the defrosting time high freezer of energy saving that is improved.

In addition,, by making the rear side of covering heater 283 to upper angled, can realize the raising of defrosting efficiency.

(the 5th embodiment)

Below, use accompanying drawing to describe the 5th embodiment of the present invention in detail.

Fig. 9 is the stereogram of the freezer of the 5th embodiment of the present invention.Figure 10 is the profilograph of the freezer of the 5th embodiment of the present invention.Figure 11 is the profilograph of cooler periphery of the freezer of the 5th embodiment of the present invention.Figure 12 is the vertical section details drawing of cooler periphery of the freezer of the 5th embodiment of the present invention.

As shown in Fig. 9 to Figure 12, freezer main body 301 (for example has forwardly the metal system of opening, iron plate) outer container 324 and hard resin system (for example, interior case 325 ABS) and foam filled hard polyurethane foams forms between outer container 324 and interior case 325 insulated body 326.This freezer main body 301 possesses be arranged at the refrigerating chamber 302 on top, the ice-making compartment 304 that is arranged at the upper strata refrigerating chamber 303 under refrigerating chamber 302 and is set up in parallel with upper strata refrigerating chamber 303 under refrigerating chamber 302.In addition, freezer main body 301 also possesses the vegetable compartment 306 of the lower body part of being arranged at and is arranged at the upper strata refrigerating chamber 303 that is set up in parallel and the lower floor's refrigerating chamber 305 between ice-making compartment 304 and vegetable compartment 306.The front face of upper strata refrigerating chamber 303, ice-making compartment 304, lower floor's refrigerating chamber 305 and vegetable compartment 306 is freely closed (closing) by upper strata refrigerating chamber door 303a, ice-making compartment door 304a, the refrigerating chamber door 305a of lower floor and the vegetable compartment door 306a switching of pull-out type (drawing and pulling type, drawer type).Refrigerating-chamber door 302a switching by opposite opened before refrigerating chamber 302 is freely closed (closing).

For the temperature of refrigerating chamber 302, for stored refrigerated and to take the temperature not freezing be lower limit, be conventionally set to 1 ℃～5 ℃.The temperature of vegetable compartment 306 is set to 2 ℃～7 ℃ of the Temperature Setting equal or slightly high with refrigerating chamber 302 mostly.If be set to low temperature, can maintain for a long time the freshness of leaf vegetables (vegetables).

The temperature of upper strata refrigerating chamber 303He lower floor refrigerating chamber 305, for freezing preservation, is set to-22 ℃ to-18 ℃ conventionally, but in order to improve freezing preservation state, for example, is sometimes also set to the low temperature of-30 ℃ to-25 ℃.

Because refrigerating chamber 302 and vegetable compartment 306 are set to positive temperature in freezer, therefore, be called refrigerated storage temperature band.In addition, because upper strata refrigerating chamber 303, lower floor's refrigerating chamber 305, ice-making compartment 304 are set to negative temperature in freezer, therefore, be called cryogenic temperature band.In addition, upper strata refrigerating chamber 303 also can be used as switching chamber, by using air door mechanism etc., as the chamber that can select to take to from refrigerated storage temperature cryogenic temperature band.

The top part of freezer main body 301,, consists of the first top part 308 and the second top part 309 with step-like and be provided with recess towards the back side of freezer direction.With step-like the second top part 309 that is provided with recess, be provided with Machine Room 319.By be disposed at the Machine Room 319 of this step-like recess compressor 317, carry out the drier that moisture removes (without diagram), condenser (without diagram), the radiating tube (without diagram) of heat transmission, capillary 318, cooler 307 and enclose cold-producing medium in being sequentially connected to the freeze cycle of ring-type, carry out cooling running.For cold-producing medium, in recent years, for environmental protection, mostly use combustible refrigerant.In addition,, when using the freeze cycle of triple valve or transfer valve, also can in Machine Room 319, set these functional parts.

In addition, refrigerating chamber 302 is divided by the first heat insulation separating part 310 with ice-making compartment 304 and upper strata refrigerating chamber 303.In addition, ice-making compartment 304 is divided by the second heat insulation separating part 311 with upper strata refrigerating chamber 303.In addition, ice-making compartment 304 and upper strata refrigerating chamber 303Yu lower floor refrigerating chamber 305 are divided by the 3rd heat insulation separating part 312.

The parts that the second heat insulation separating part 311 and the 3rd heat insulation separating part 312 are assembled afterwards for the foaming of freezer main body 301, therefore, usually used as heat-barrier material, are used expanded polystyrene (EPS), in order to improve heat-proof quality and rigidity, also can use hard polyurethane foams.In addition, as the second heat insulation separating part 311 and the 3rd heat insulation separating part 312, insert the vacuum heat insulation material (Vacuumed insulation panel) of high thermal insulation, can realize the further slimming of separation structure.

In addition, by guaranteeing that the running portion of doorframe carries out slimming and the abolishment of the shape of the second heat insulation separating part 311 and the 3rd heat insulation separating part 312, cooling air duct can be guaranteed, the raising of cooling capacity can be realized.In addition, by the inside of scratching except (connection) second heat insulation separating part 311 and the 3rd heat insulation separating part 312, become wind path, and when can reduce along with material, realize the reduction of cost.

In addition, lower floor's refrigerating chamber 305 and vegetable compartment 306 are divided by the 4th heat insulation separating part 313.

The structure of cooler periphery in present embodiment then, is described.

At the back side of freezer main body 301, be provided with cooler chamber 323, in cooler chamber 323, comprise as the second heat insulation separating part 311 of heat insulation partition wall and the rear area of the 3rd heat insulation separating part 312, at the back side of lower floor's refrigerating chamber 305 above-below direction be lengthways equipped with as representational fin tube type for generating the cooler 307 of cold air.

Before cooler chamber 323, dispose the cooler cover 320 that aluminium or copper is material of take that covers cooler 307, cooler cover 320 possesses for the cold air of cooling lower floor's refrigerating chamber 305 being back to the cold air return port 335 of cooler 307.

Cooler cover 320 is consisted of the cooler front side cover 337 of freezer inner side and the cooler rear side cover 338 of cooler side, possesses the heat transfer consisting of cooler front side cover 337 and cooler rear side cover 338 suppress space 339 in the place ahead of cooler 307.Between the outlet lower end of the upper end Dao Xiang lower floor refrigerating chamber 305 of the cold air return port 335 that inhibition heat transfer space 339 possesses in the bottom from cooler cover 320, form.The height that heat transfer suppresses space 339 has the thermally-inhibited effect of biography when being positioned at the upper end of cooler 307, but can decide position according to the balance of freezer inner capacities and shell dimension.In the present embodiment, for conducting heat, suppress the height in space 339, flowing of the heating installation while considering defrosting, is approximately positioned at and near the downside Defrost heater 332 of cooler 307, plays the outlet lower end to lower floor's refrigerating chamber 305 of the 3rd section.In addition, the inside in heat transfer inhibition space 339 is air layer.

In addition, cooler 307 sides at cooler rear side cover 338, dispose metal heat transfer promoting member 340.In the present embodiment, consider cost, heat transfer in order to defrost promotes, by the aluminium foil of t=8 μ m take that it is of a size of from the lower end of cooler 307 to upper end up and down, side-to-side dimensions attaches (stickup) to the such size of size about+15mm as the fin from cooler 307.Thereby the effect that the heat transfer in the time of can being promoted thus defrosting, raising defrosting efficiency defrosting time shorten.In addition, in order to obtain further effect, can be at the interior case 325 configuration aluminium foils of the rear side of cooler 307.In addition, by be greater than aluminium sheet, the pyroconductivity of aluminium foil with thickness, for example, higher than the material (copper) of aluminium, form, can further bring into play the effect of conducting heat and promoting.

In addition, the cold air return port 335 at cooler cover 320 is provided with defrosting heating installation guide member 341.Defrosting heating installation guide member 341 from freezer inner side towards cooler 307 sides with the angle making progress, in the present embodiment, making this angle relative level face is about 45 °.Now, the position being disposed at higher than cooler lower end 344 as the defrosting heating installation guide portion upper end 343 of the upper end of defrosting heating installation guide member 341.Thus, can increase in freezer, circulate return to cold air with respect to the heat exchange area of cooler 307, therefore, heat exchange amount in cooler 307 increases, the ability that can realize cooler 307 improves.

In addition, at cold air return port 335, be provided with wind direction guide portion 322.This wind direction guide portion 322 be spaced apart 5mm more than, guarantee to prevent the intrusion of finger and the intensity of mould and cooler cover 320.In addition, a part for wind direction guide portion 322 also from freezer inner side towards cooler 307 sides, with the defrosting heating installation guide member 341 equidirectional angles that make progress.

(for example upper space) near cooler 307 dispose utilize forced convertion mode by the cold air being generated by cooler 307 to the cold air Air Blast fan 316 of blowing in each storeroom of refrigerating chamber 302, ice-making compartment 304, upper strata refrigerating chamber 303, lower floor's refrigerating chamber 305, vegetable compartment 306.Below cooler 307, be provided with and be attached to the Defrost heater being formed by Glass tube heater 332 that the frost of cooler 307, cold air Air Blast fan 316 defrosts when cooling.

Above the Defrost heater 332 being formed by Glass tube heater, dispose the cover heater 333 that covers Defrost heater 332.Cover heater 333 forms glass caliber and the equal above size of width with Defrost heater 332, make by the water droplet process defrosting that makes to drip from cooler 307, to be directly dropped in and to become the glass tube of high temperature surface when defrosting, and do not send the sound of ticktack ticktack.

Below Defrost heater 332, dispose being attached to that the frost of cooler 307 melts and the defrost water that falls receives, form as one with the upper surface of the 4th heat insulation separating part 313 of lower surface as refrigerating chamber 305 drain pan 334.

In addition, before cooling Air Blast fan 316, dispose by cooler front side cover 337 diffusers that form (diffuser) (without diagram), make directly not lose and discharge in freezer from the high wind of the static pressure of cold air Air Blast fan 316.

Herein, the drain pan 334 forming as one at the upper surface with the 4th heat insulation separating part 313, disposes to side-prominent protrusion member 336 in freezer at the lower surface of lower floor's refrigerating chamber 305, hooks the bottom of cooler cover 320 and fixes.In addition, protrusion member 336 is disposed between the lower end and Defrost heater 332 of cold air return port 335.Thus, cannot see towards red-hot (red heat) in freezer, and when seeing from freezer inner side, protrusion member 336 is hidden in cold air return port 335 lower ends of cooler cover 320, therefore, contributes to good outward appearance, and outward appearance grade is improved.

As the cold-producing medium of freeze cycle in recent years, the viewpoint of saving from damage from earth environment, is used the little iso-butane as combustible refrigerant of greenhouse effects of the earth coefficient.Iso-butane as this hydrocarbon is compared with air, is the proportion (in 2.04,300K) of approximately 2 times under normal temperature, atmospheric pressure.Thus, compared with prior art, can reduce the loading of cold-producing medium, realize low cost, and the amount of leakage when making combustible refrigerant just in case occurring to reveal reduces, and can further improve security.

In present embodiment, in cold-producing medium, use iso-butane, as explosion-proof countermeasure, the maximum temperature on the glass tube surface of the gabarit of the Defrost heater being formed by Glass tube heater 332 while having stipulated as defrosting.In order to reduce the temperature on glass tube surface, adopt the dual Glass tube heater that glass tube is formed to dual structure.In addition, as the method that reduces the temperature on glass tube surface, also can for example, at the high parts (, aluminium fin) of glass tube surface coiling thermal diffusivity.Now, by making glass tube, be substance structure, and can reduce the appearance and size of Defrost heater 332.

As the method that improves defrosting efficiency, also can be outside the Defrost heater 332 being formed by Glass tube heater, and use the pipe heater that connects airtight (bonding) with cooler 307.Now, by the direct heat transfer from pipe heater, carry out efficiently the defrosting of cooler 307.And, because can melt the drain pan 334 of the surrounding that is attached to cooler 307 and the frost of cold air Air Blast fan 316 with Defrost heater 332, make it possible to realize the shortening of defrosting time, realize energy-conservationly, suppress the rising of the refrigeration storehouse temperature in defrosting time.

In addition,, when the Defrost heater 332 that combination consists of Glass tube heater and pipe heater, by making mutual suitableization of heater capacity, can reduce the capacity of Defrost heater 332.In the time can reducing heater capacity, also can reduce the temperature of gabarit of the Defrost heater 332 in when defrosting, therefore, red-hot in the time of also can suppressing to defrost.

Then, the cooling of freezer is described.For example, lower floor's refrigerating chamber 305, due to the intrusion heat from outer gas and door switch etc., causes refrigerating storehouse temperature and rises, and refrigerating chamber sensor (without diagram) reaches start-up temperature when above, and compressor 317 startups, begin to cool down.The cold-producing medium of the HTHP of discharging from compressor 317, be disposed at the drier (without diagram) of mechanical type 319 in final arrival during, particularly in being arranged at the radiating tube of outer container 324 (without diagram), the heat exchange of outside air and the insulated body consisting of hard polyurethane foams 326 in freezer by outside 324, is cooled and liquefies.

Then, the cold-producing medium of liquefaction is reduced pressure by capillary 318, flows into cooler 307, carries out heat exchange with air in the freezer of cooler 307 peripheries.Cold air after heat exchange is sent to cold air by near cold air Air Blast fan 316, by cooling in freezer in freezer.Afterwards, cold-producing medium is heated, gasifies, and gets back to compressor 317.Cooling in freezer, the temperature of refrigerating chamber sensor (without diagram) arrives and stops temperature when following, and compressor 317 shuts down.

Cold air Air Blast fan 316 is also directly equipped on interior case 325 sometimes, but processes by being equipped on the foaming piece that the second heat insulation separating part 311 of assembling carries out parts afterwards, can realize the reduction of manufacturing cost.

During then, to the defrosting of freezer, describe.

Make freezer carry out cooling running, through after a while, and because of the airborne moisture of invading when the door switch, the moisture that is attached to the food of putting into freezer, also have from the moisture etc. that is stored in the vegetables of vegetable compartment 306, at cooler 307, be attached with frost.Along with the growth of this frost, between cooler 307 and circulation cold air, heat exchanger effectiveness reduces, can not be by fully cooling in freezer, and finally slow in freezing (chilly) or not cold state.Therefore,, in freezer, need to regularly remove the frost that is attached to cooler 307.

Freezer in present embodiment, turns round, after certain hour, automatically defrosts at freezer.When defrosting, stop the running of compressor 317, cold air Air Blast fan 316, to Defrost heater 332 energisings that formed by Glass tube heater.Cooler 307 is owing to being stranded in the cold-producing medium and white the melting that is attached to cooler 307 of cooler 307 inside, about through the sensible heat variation of-30 ℃ to 0 ℃, the latent heat variation of 0 ℃, from the sensible heat variation of 0 ℃ and intensification gradually.In cooler 307, defrosting sensor (without diagram) is installed, if reach the energising that set point of temperature stops Defrost heater 332 herein.In the present embodiment, Defrost heater stops the energising of Defrost heater 332 in the moment that detects 10 ℃.

Now, by the energising of Defrost heater 332, glass tube surface reaches a high temperature, by utilizing radiant heat to melt, be attached to the drain pan 334 of the surrounding of cooler 307, cooler 307, the frost of cold air Air Blast fan 316, thus, make cooler 307 obtain recovery (updating maintenance, refresh).

In addition, for example, in the low outer gas of 5 ℃ of left and right, even if the frost to cooler 307 defrosts fully, also can be due to the impact of outer gas, the temperature of the sensor (scheming not shown) that makes to defrost when defrosting is difficult to heat up fully, has the elongated trend of defrosting time.Now, also can combine and observe 0 ℃ of above sensible heat variable condition, if finish through above after a while the control that defrosts.Thus, thus can suppress in low outer gas the cooler 307 irrelevant with defrosting fully heat up not enoughly cause elongated, the unnecessary heater input of defrosting time, the cooling intensification that stops causing during because of the photothermal intensification in freezer and defrosting.

As shown in the embodiment, from easy to use and energy-conservation viewpoint, often use vegetable compartment 306 is arranged to below, lower floor's refrigerating chamber 305 is set in middle, refrigerating chamber 302 is arranged to the arrangement architecture of the such freezer in top.In addition, from the viewpoint of freezer inner capacities with along with the use amount of frozen food increases tendency, thereby can provide the freezer inner housing size that increases lower floor's refrigerating chamber 305 to improve the freezer of capacity.

Now, if increase freezer inner housing, with the size decreases of the cooler cover 320 at the back side, cooler 307 during defrosting, the temperature in cooler chamber 323 rise, and, due to the radiant heat from Defrost heater 332 and convection current, the temperature that is stored in the frozen food in refrigerating chamber is affected.Therefore, in the present embodiment, by the heat transfer being formed by cooler front side cover 337 and cooler rear side cover 338 suppress space 339, the defrosting heating installation guide member 341 that is arranged at cold air return port 335 while suppressing to defrost to the heat affecting in freezer.In the present embodiment, the inside that makes conduct heat to suppress space 339 is air layer, even rise because the radiant heat from Defrost heater 332 causes cooler 307 temperature around, also can suppress to the heat conduction in freezer.Therefore, can reduce being stored in freezer, the particularly temperature impact of the food of cooler side, can suppress the deteriorated of food, can preserve for a long time.The pyroconductivity of air layer is approximately 0.03W/mK, and for example, refrigeration storehouse temperature be-25 ℃, and when cooler indoor temperature during defrosting rises to 20 ℃, heat insulation due to air layer, refrigerates storehouse temperature and only rise to-17 ℃.Now, the inside dimension in the thickness of air layer, i.e. heat transfer inhibition space 339 is 13.4mm.Thus, when defrosting, it is also that frozen food or ice cream melt, below-12 ℃ of quality badness that temperature rises, and therefore, in long-term preservation, also can suppress quality badness.

In addition, be not only the temperature impact on food in freezer, reduce the position that can also make the local temperature in freezer reduce, therefore, also have and prevent that when door switch or when food puts into, from being attached to the distillations such as moisture of food, obtaining moisture is attached to the effect of cooler cover 320 as frost.Thus, can guarantee the wet-out property of cooler 307, and, do not need to use for preventing the auxiliary heater of frost.

In addition, can reduce when defrosting to the temperature impact in freezer, also have the effect of freezer internal loading amount while reducing defrosting.Therefore, the cooling load amount after defrosting time reduces, and therefore, the running rotating speed that can also obtain cooling needed compressor 317 in the freezer after defrosting time lowers and shorten the duration of runs energy-saving effect bringing.

In addition, due to defrosting heating installation guide member 341 is tilted 45 ° configuration is installed with the angle making progress towards cooler 307 sides from freezer inner side, therefore, the convection current that the radiant heat of the Defrost heater 332 during from defrosting causes is easily moved to cooler 307, can make efficiently the frost that is attached to cooler 307 melt, therefore, realize the minimizing of the conduction time of Defrost heater 332, thereby electricity input reduction becomes energy-conservation.Now, due to the defrosting shortening of conduction time, thereby shorten non-cooling running time and suppress the temperature that heating that temperature rises, suppresses Defrost heater 332 self causes and rise, thus, cooling load amount after defrosting time reduces, therefore, also can access the energy-saving effect that running rotating speed lowers and the duration of runs, shortening brought of cooling needed compressor 317 in the freezer after defrosting time.

In addition, utilize defrosting heating installation guide member 341, the convection current causing from the radiant heat of the Defrost heater 332 in when defrosting is flowed to cooler 307 at an easy rate, also has and suppresses heat to the effect flowing in freezer, the effect that also has the temperature that suppresses in freezer to rise.For the frozen food being stored in freezer, at the heating installation in when defrosting, to the impact that flows into the change that causes frostbite or heat in freezer, cause deterioratedly, but due to the effect of defrosting heating installation guide member 341, when long-term preservation, also can suppress the deteriorated of food.

In present embodiment, upwards 45 ° of the angles of heating installation guide member 341 make to defrost, but the angle making progress also can consider to return the flow direction of cold air, the easy degree of making of the flow direction of the heating installation in when defrosting, freezer inner capacities, mould etc. decides angle.

In addition, because the heating installation guide member 341 that makes to defrost is configured to one with cooler rear side cover 338, can reduce fee of material and the mould expense of making defrosting heating installation guide member 341, and, the step in production process can be reduced.In addition, by forming the structure in cooler rear side cover 338, can make to comprise the simple shape of the pattern draft of mould, therefore, contribute to the further reduction of model expense (mold expense).In addition, because the management of 2 parts from defrosting heating installation guide member 341 and cooler rear side cover 338 becomes the management of 1 parts, therefore, can reduce administrative expenses, the cost that realize to form goods, contributes to the reduction of selling price, thus raising that can enforcement sale rate.

On the other hand, also can make to defrost heating installation guide member 341 is configured to one with cooler front side cover 337.Now, can obtain and same effect while being configured to one with cooler rear side cover 338.In present embodiment, the heating installation guide member 341 of making to defrost is configured to one with cooler rear side cover 338, still, expectation consider cooler cover 320 structural form, make easy degree, mould structure, cost etc., implement optimum mode.

In addition, a part that is arranged at the wind direction guide portion 322 in the cold air return port 335 of cooler cover 320 belows has and defrosting heating installation guide member 341 equidirectional gradients, from freezer inner side towards cooler side, with angle configurations upward.Thus, when seeing in freezer, can see that each wind direction guide portion is overlapping with respect to Defrost heater 332, therefore, even while opening refrigerating chamber door when freezer defrosts, also cannot see the red-hot state of Defrost heater 332.In the present embodiment, make the angle of wind direction guide portion 322 identical with the pattern draft of mould, but in the time of also can considering return to the flow direction of cold air and defrost, the flow direction of heating installation decide angle.

In addition, the convection current that the radiant heat of the Defrost heater 332 during from defrosting causes, easily moves to cooler 307 via defrosting heating installation guide member 341, therefore, can further suppress to flow into the heating installation in freezer, and the efficiency can improve defrosting time.

In addition, making a part and the defrosting heating installation guide member 341 of wind direction guide portion 322 is the equidirectional gradient making progress, therefore, the suction ventilation resistance that returns to cold air in the time of can suppressing cooling, therefore, also can increase air circulation, the heat exchange amount that is increased in cooler 307 rises evaporating temperature, thereby freeze cycle efficiency is improved, can realizes thus energy-conservation.In addition, the raising of heat exchange amount and the increase of air circulation by cooler 307, can reduce the time in cooling refrigeration storehouse, therefore, can reduce by the shortening of the cooling duration of runs to cooler 307 frost amount.Thus, extend the defrosting cycle of cooler 307, the interior cooling needed electric power input minimizing of freezer that realizes the input number of times minimizing of Defrost heater 332 and defrost after the refrigeration storehouse temperature rising causing, can further carry out energy-conservation.

In addition, the heating installation guide member 341 that makes to defrost is disposed between the upper end of cold air return port 335 or the lower end of fundamental profile shape and cooler lower end 344 of cooler rear side cover 338,, defrosting heating installation guide portion upper end 343 is positioned at than 344Gao position, cooler lower end, thus, increase the heat exchange area that returns to cold air and cooler 307.Thus, increase can be at cooler 307 area of frost, the deterioration of the cooling capacity in the time of can suppressing frost.Thus, can extend as operation freezer until need the defrosting cycle of the time of defrosting, in the freezer of realizing the input number of times minimizing of Defrost heater 332 and defrosting after the refrigeration storehouse temperature rising causing, cooling needed electric power input minimizing, can further carry out energy-conservation.

In addition,, if reduce flowing resistance, when cold air Air Blast fan 316 is same fan voltage, air circulation increases.The performance plot that represents flowing resistance and air quantity in Figure 13.As shown in figure 13, in the cooling performance of freezer, according to the characteristic of fan, flowing resistance is reduced to a little 1 → P1 → P2 of 2 air circulation increase to Q1 → Q2.

In addition, in the time of can guaranteeing performance with same air quantity, by reducing the rotation speed of the fan of cold air Air Blast fan 316, can access same air quantity.Now, move characteristic point 2 → 3, and the input of rotation speed of the fan sloping portion reduces, can be energy-conservation as electricity input.In addition, by rotation speed of the fan, reduce, can realize the reduction of the sound of the wind of cold air Air Blast fan 316, therefore, even in the low quiet environment of the ambient noises such as night, also can not notice noise.

In addition, for utilizing wind direction guide portion 322 and defrosting heating installation guide member 341 to suppress to flow into the heating installation in freezer, prevent in freezer frost be also effective.If the heating installation in freezer flows into many, particularly to become with the part being communicated with in freezer and freezer inner top surface frost significantly occur, while having long-term use, when defrosting after a while and at every turn, that frost part is dripped and the possibility of falling freezer inner housing (storehouse inner housing).According to the shape of present embodiment, the inhibition that realization flows into the heating installation in freezer, therefore, general more than 10 years even if freezer is used, also can prevent the reliability decrease that frost causes, high-quality freezer can be provided.

The inhibition space 339 of conducting heat, defrosting heating installation guide member 341, wind direction guide portion 322, consist of suitably, the reduction of heat affecting in the freezer during by defrosting is, the raising of defrosting efficiency can be brought into play further energy-conservation effect.

In addition, in present embodiment, making formed heat transfer suppress interior volume is air layer, but, for example, the heat insulating member forming by being heat-proof quality is high, pyroconductivity is low hard polyurethane foams, expanded polystyrene (EPS) (foamed styrene), polyethylene foamed, can further realize the reduction of temperature impact, can bring into play better effect.

In addition, it is more than 60mm making the end face of Defrost heater 332 sides of wind direction guide portion 322 and the beeline of the glass tube gabarit of Defrost heater 332.Thus, the temperature that can suppress the cooler cover 320 self of the formation cold air return port 335 that causes from the radiant heat of Defrost heater 332 due to when defrosting rises, therefore, even the distortion that the temperature impact that does not also occur to be caused by radiant heat when when defrosting etc. excessively extends defrosting time causes.In addition, owing to making beeline, be more than 60mm, therefore, during defrosting from the current of warm air of Defrost heater 332 to cooler side, have and easily suppress the effect that flows in freezer.

In addition, in present embodiment, the kind of cold-producing medium is used to iso-butane, therefore, the temperature on the glass tube surface of the Defrost heater 332 during defrosting regulation is for Celsius below 394 ℃.In addition, the PP (polypropylene) of the cooler cover 320 using in present embodiment and the materials'use cheapness of wind direction guide portion 322, the heat-resisting melting temperature of PP is approximately 200 ℃ Celsius, ignition temperature is approximately 440 ℃ Celsius.But, consider actual use, heat resisting temperature is set as to 135 ℃ Celsius.That is, consider cutter worst case, the glass tube surface temperature of calculating Defrost heater 332 is that 394 ℃ Celsius, materials'use PP, heat resisting temperature are 135 ℃ of sizes when following Celsius, and it is more than 60mm making above-mentioned beeline.In above-mentioned calculating, according to this special fence-Boltzmann law, derive.

(the 6th embodiment)

As shown in figure 14, have and be arranged at the back side of freezer main body, the cooler 357 of generation cold air; Be arranged at the below of cooler 357, the Defrost heater 382 being formed by Glass tube heater.Below Defrost heater 382, be provided with being attached to that the frost of cooler 357 melts and the defrost water that falls receives, form as one with the lower surface of lower floor's refrigerating chamber 355 drain pan 384.In addition, dispose the cooler cover 370 that covers cooler 357, wherein, cooler cover 370 possesses the cold air return port 385 that the cold air for making lower floor's refrigerating chamber 355 cooling returns to cooler 357.

Cold air return port 385 at cooler cover 370 is provided with defrosting heating installation guide member 391.Defrosting heating installation guide member 391 from freezer inner side towards cooler 357 sides with the angle making progress, in the present embodiment, making this angle is about 45 °.In addition, at the cold air return port 385 that is arranged at the bottom of cooler cover 370, be provided with wind direction guide portion 372.A part for wind direction guide portion 372 also from freezer inner side towards cooler 357 sides, with the defrosting heating installation guide member 391 equidirectional angles that make progress.

In the present embodiment, the center configuration of Defrost heater 382 in become the 4th heat insulation separating part 363 upper surface lower floor's refrigerating chamber 355 end basic side more top position.Thus, the drain pan 384 can Shi Yu lower floor refrigerating chamber forming as one below be shaped as approximate horizontal, can reduce for the idle space of Defrost heater 382 is set, thereby can realize the increase of internal volume.

In addition, can make the degree of depth of drain pan 384 shoal, can suppress by form parts-moulding time die cost, therefore, also contribute to cost.In addition, the distortion in the time of also can suppressing the bonding hard polyurethane foams in the inside of the outer container with freezer main body and interior case to foam, improves goods yield rate, reduce abandonment charge, and the operability while installing also improves, and therefore, can provide the freezer that exterior quality is good.

Now, a part that is arranged at the wind direction guide portion 372 in the cold air return port 385 of cooler cover 370 belows has and defrosting heating installation guide member 391 equidirectional gradients, from freezer inner side towards cooler 357 sides, with angle configurations upward.Thus, can see that each wind direction guide portion 372 is overlapping with respect to Defrost heater 382 when seeing in freezer, therefore, even while opening refrigerating chamber door when freezer defrosts, also cannot see the red-hot state (febrile state) of Defrost heater 382, therefore, user is not produced to uneasy sense.

(the 7th embodiment)

Figure 15 is the vertical section details drawing of cooler periphery of the freezer of the second embodiment of the present invention.

As shown in figure 15, have and be arranged at the back side of freezer main body, the cooler 407 of generation cold air; With the Defrost heater 432 below, that formed by Glass tube heater that is arranged at cooler 407.Below Defrost heater 432, be provided with being attached to that the frost of cooler 407 melts and the defrost water that falls receives, form as one with refrigerating chamber 405 lower surfaces drain pan 434.In addition, dispose the cooler cover 420 that covers cooler 407, wherein, cooler cover 420 possesses the cold air return port 435 that the cold air for making lower floor's refrigerating chamber 435 cooling returns to cooler 407.

Cold air return port 435 at cooler cover 420 is provided with defrosting heating installation guide member 441.Defrosting heating installation guide member 441 from freezer inner side towards cooler 407 sides with the angle making progress, in present embodiment, making this angle relative level face is about 45 °.In addition, at the cold air return port 435 that is arranged at the bottom of cooler cover 420, be provided with wind direction guide portion 422.A part for wind direction guide portion 422 also from freezer inner side towards cooler 407 sides, with the defrosting heating installation guide member 441 equidirectional angles that make progress.

In the present embodiment, the cover heater 433 that covers the top of Defrost heater 432 is configured at fore-and-aft direction and is provided with gradient, forms the structure that relative inside-of-refrigerator has improved cover heater 433 end faces of rear side.In addition, in cooler 407, so that the pattern of pipe is staggered, the mode that cooling tube is tilted in freezer inner side is installed cooler 407.

Thus, when defrosting, current of warm air flows centered by the rear side of cooler 407 in beginning, then utilizes the gradient of pipe to freezer flows inside.Therefore, be difficult to flow to cold air return port 435, and, utilize defrosting heating installation guide member 441 and 422 inhibition of wind direction guide portion to flow into the heating installation in freezer, therefore, performance reduces the effect of the rising of refrigeration storehouse temperature.

In addition, by making the inlet tube of cooler 407 be positioned at rear side, can be low by temperature, easy the convection current that produces defrosting heating installation centered by the part of frost, therefore, can efficiency defrost well.

In addition,, by making the rear side of covering heater 433 to upper angled, can realize the further raising of defrosting efficiency.

(the 8th embodiment)

Figure 16 is the cooler chamber detailed cross sectional view of the freezer of the 8th embodiment of the present invention.

As shown in figure 16, there is the cooler 457 back side, that generate cold air that is arranged at freezer main body; With the Defrost heater 482 below, that formed by Glass tube heater that is arranged at cooler 457.Below Defrost heater 482, be provided with being attached to that the frost of cooler 457 melts and the defrost water that falls receives, form as one with the lower surface of lower floor's refrigerating chamber 455 drain pan 484.In addition, dispose the cooler cover 470 that covers cooler 457, wherein, cooler cover 470 possesses the cold air return port 485 that the cold air for making lower floor's refrigerating chamber 455 cooling returns to cooler 457.

Cold air return port 485 at cooler cover 470 is provided with defrosting heating installation guide member 491.Defrosting heating installation guide member 491 from freezer inner side towards cooler 457 sides with the angle making progress, in present embodiment, making this angle is about 45 °.In addition, at the cold air return port 485 that is arranged at the bottom of cooler cover 470, be provided with wind direction guide portion 472.A part for wind direction guide portion 472 also from freezer inner side towards cooler 457 sides, with the defrosting heating installation guide member 491 equidirectional angles that make progress.

And, in the present embodiment, wind direction guide portion 472 and defrosting heating installation guide member 491 are linked, form the link wind direction guiding piece 495 that forms large-scale wind direction guide portion.Thus, the convection current that the radiant heat of the Defrost heater 482 during from defrosting causes more easily flows to cooler 457, can melt efficiently the frost that is attached to cooler 457, therefore, realize the minimizing of the conduction time of Defrost heater 482, the minimizing of electricity input, thus become energy-conservation.

In addition, the radiant heat of the Defrost heater 482 while suppressing from defrosting also becomes greatly to the effect flowing in freezer, has the effect of the temperature rising in further inhibition freezer.

In addition, by making to link wind direction guiding piece 495, be configured to one with cooler front side cover 487 or cooler rear side cover 488, and can reduce fee of material and mould expense, and also can reduce the step in manufacturing process.

(the 9th embodiment)

Below, use accompanying drawing to describe the 9th embodiment of the present invention in detail.

Figure 17 is the stereogram of the freezer of the 9th embodiment of the present invention.Figure 18 is the profilograph of the freezer of the 9th embodiment of the present invention.Figure 19 is the profilograph of cooler periphery of the freezer of the 9th embodiment of the present invention.Figure 20 is the vertical section details drawing of cooler periphery of the freezer of the 9th embodiment of the present invention.

As shown in Figure 17 to Figure 20, freezer main body 501 (for example has forwardly the metal system of opening, iron plate) outer container 524 and hard resin system (for example, interior case 525 ABS) and foam filled hard polyurethane foams forms between outer container 524 and interior case 525 insulated body 526.This freezer main body 501 possesses be arranged at the refrigerating chamber 502 on top, the ice-making compartment 504 that is arranged at the upper strata refrigerating chamber 503 under refrigerating chamber 502 and is set up in parallel with upper strata refrigerating chamber 503 under refrigerating chamber 502.In addition, freezer main body 501 also possesses the vegetable compartment 506 of the lower body part of being arranged at and is arranged at the upper strata refrigerating chamber 503 that is set up in parallel and the lower floor's refrigerating chamber 505 between ice-making compartment 504 and vegetable compartment 506.The front face of upper strata refrigerating chamber 503, ice-making compartment 504, lower floor's refrigerating chamber 505 and vegetable compartment 506 is freely closed by upper strata refrigerating chamber door 503a, ice-making compartment door 504a, the refrigerating chamber door 505a of lower floor and the vegetable compartment door 506a switching of pull-out type.Refrigerating-chamber door 502a switching by opposite opened before refrigerating chamber 502 is freely closed.

For the temperature of refrigerating chamber 502, to take the temperature not freezing be lower limit for stored refrigerated, is conventionally set to 1 ℃～5 ℃.The temperature of vegetable compartment 506 is set to 2 ℃～7 ℃ of the Temperature Setting equal or slightly high with refrigerating chamber 502 mostly.If be set to low temperature, can maintain for a long time the freshness of leaf vegetables.

The temperature of upper strata refrigerating chamber 503He lower floor refrigerating chamber 505, for freezing preservation, is set to-22 ℃ to-18 ℃ conventionally, in order to improve freezing preservation state, for example, is sometimes also set to the low temperature of-30 ℃ to-25 ℃.

Because refrigerating chamber 502 and vegetable compartment 506 are set to positive temperature at refrigeration storehouse temperature, therefore, be called refrigerated storage temperature band.In addition, because upper strata refrigerating chamber 503, lower floor's refrigerating chamber 505, ice-making compartment 504 are set to negative temperature in freezer, therefore, be called cryogenic temperature band.In addition, upper strata refrigerating chamber 503 also can be used as switching chamber, by using air door mechanism, as the chamber that can select to take to from refrigerated storage temperature cryogenic temperature band.

The top part of freezer main body 501,, consists of the first top part 508 and the second top part 509 with the step-like recess that is provided with towards the back side of freezer direction.With step-like the second top part 509 that is provided with recess, be provided with Machine Room 519.By be disposed at the Machine Room 519 of this step-like recess compressor 517, carry out the drier that moisture removes (without diagram), condenser (without diagram), the radiating tube (without diagram) of heat transmission, capillary 518, cooler 507 and enclose cold-producing medium in being connected in turn the freeze cycle of ring-type, carry out cooling running.For cold-producing medium, in recent years, for environmental protection, mostly use combustible refrigerant.In addition,, when using the freeze cycle of triple valve or transfer valve, also can in Machine Room 519, set these functional parts.

In addition, refrigerating chamber 502 is divided by the first heat insulation separating part 510 with ice-making compartment 504 and upper strata refrigerating chamber 503.In addition, ice-making compartment 504 is divided by the second heat insulation separating part 511 with upper strata refrigerating chamber 503.In addition, ice-making compartment 504 and upper strata refrigerating chamber 503Yu lower floor refrigerating chamber 505 are divided by the 3rd heat insulation separating part 512.

The parts that the second heat insulation separating part 511 and the 3rd heat insulation separating part 512 are assembled afterwards for the foaming of freezer main body 501, therefore, usually used as heat-barrier material, are used expanded polystyrene (EPS), in order to improve heat-proof quality and rigidity, also can use hard polyurethane foams.In addition, as the second heat insulation separating part 511 and the 3rd heat insulation separating part 512, insert the vacuum heat insulation material of high thermal insulation, can realize the further slimming of separation structure.

In addition, by guaranteeing that the running portion of doorframe carries out slimming and the abolishment of the shape of the second heat insulation separating part 511 and the 3rd heat insulation separating part 512, cooling air duct can be guaranteed, the raising of cooling capacity can be realized.In addition, by the inside of scratching except (connection) second heat insulation separating part 511 and the 3rd heat insulation separating part 512, become wind path, and can be along with the minimizing of material time, realize the reduction of cost.

In addition, lower floor's refrigerating chamber 505 and vegetable compartment 506 are divided by the 4th heat insulation separating part 513.

The structure of cooler periphery in present embodiment then, is described.

At the back side of freezer main body 501, be provided with cooler chamber 523, in cooler chamber 523, comprise as the second heat insulation separating part 511 of heat insulation partition wall and the rear area of the 3rd heat insulation separating part 512, at the back side of lower floor's refrigerating chamber 505 above-below direction be lengthways equipped with as representational fin tube type for generating the cooler 507 of cold air.

Inside-of-refrigerator above in cooler chamber 523, disposes the cooler cover 520 that covers cooler 507, and cooler cover 520 possesses for the cold air of cooling refrigerating chamber being returned to the cold air return port 535 of cooler.In addition, the material of cooler 507 is used aluminium or copper.

Cooler cover 520 consists of the cooler front side cover 537 of freezer inner side and the cooler rear side cover 538 of cooler side, possesses the heat transfer consisting of cooler front side cover 537 and cooler rear side cover 538 suppress space 539 in the place ahead of cooler 507.Between the outlet lower end of the upper end Dao Xiang lower floor refrigerating chamber 505 of the cold air return port 535 that heat transfer inhibition space 539 possesses in the bottom from cooler cover 520, form.The height that suppresses space 539 if conduct heat is positioned at the upper end of cooler 507, has the thermally-inhibited effect of biography, can balance high according to freezer inner capacities and shell dimension decide position.In present embodiment, for the height that conduct heat to suppress space 539, the flowing of the heating installation while considering defrosting, be approximately positioned near the downsides Defrost heater 532 of cooler 507 play the 3rd section to till the outlet lower end of lower floor's refrigerating chamber 505.In addition, the inside in heat transfer inhibition space 539 is air layer.

In addition, cooler 507 sides at cooler rear side cover 538, dispose metal heat transfer promoting member 540.In sub-present embodiment, consider cost, heat transfer in order to defrost promotes, by the aluminium foil of t=8 μ m take that it is of a size of from the lower end of cooler 507 to upper end up and down, side-to-side dimensions attaches (stickup) to the such size of size about+15mm as the fin from cooler 507.Thereby the effect that the heat transfer in the time of can being promoted thus defrosting, raising defrosting efficiency defrosting time shorten.In addition, in order to obtain further effect, can be at the interior case 525 configuration aluminium foils of the rear side of cooler 507.In addition, the aluminium sheet, the pyroconductivity that with thickness, are greater than aluminium foil for example, form higher than the material (copper) of aluminium, can further bring into play the effect of conducting heat and promoting.

In addition, the cold air return port 535 at cooler cover 520 is provided with defrosting heating installation guide member 541.Defrosting heating installation guide member 541 from freezer inner side towards cooler 507 sides with the angle making progress, in present embodiment, making this angle relative level face is about 45 °.Now, the position being configured in higher than cooler lower end 544 as the defrosting heating installation guide portion upper end 543 of the upper end of defrosting heating installation guide member 541.Thus, can increase in freezer, circulate return to cold air with respect to the heat exchange area of cooler 507, therefore, heat exchange amount in cooler 507 increases, the ability that can realize cooler 507 improves.

In addition, at cold air return port 535, be provided with wind direction guide portion 522.This wind direction guide portion 522 be spaced apart 5mm more than, prevent finger intrusion, guarantee the intensity of mould and cooler cover 520.In addition, a part for wind direction guide portion 522 also from freezer inner side towards cooler 507 sides, with the defrosting heating installation guide member 541 equidirectional angles that make progress.

(for example upper space) near cooler 507 dispose utilize forced convertion mode by the cold air being generated by cooler 507 to the cold air Air Blast fan 516 of blowing in each storeroom of refrigerating chamber 502, ice-making compartment 504, upper strata refrigerating chamber 503, lower floor's refrigerating chamber 505, vegetable compartment 506.Below cooler 507, be provided with when cooling the Defrost heater 532 forming being attached to the Glass tube heater by glass control that the frost of cooler 507, cold air Air Blast fan 516 defrosts.

Above the Defrost heater 532 being formed by Glass tube heater, dispose the cover heater 533 that covers Defrost heater 532, cover heater 533 forms glass caliber and the equal above size of width with Defrost heater 532, make by the water droplet process defrosting that makes to drip from cooler 507, to be directly dropped in and to become the glass tube of high temperature surface when defrosting, and do not send the sound of ticktack ticktack.

Below Defrost heater 532, dispose being attached to that the frost of cooler 507 melts and the defrost water that falls receives, form as one with the upper surface of the 4th heat insulation separating part 513 as refrigerating chamber 505 lower surfaces drain pan 534.

In addition, in the front portion of cooling Air Blast fan 516, dispose by cooler front side cover 537 diffusers that form (without diagram), the wind that becomes high static pressure from cold air Air Blast fan 516 is not directly lost and in freezer, discharge.

Herein, the drain pan 534 forming as one at the upper surface with the 4th heat insulation separating part 513, disposes to side-prominent protrusion member 536 in freezer at the lower surface of lower floor's refrigerating chamber 505, hooks the bottom of cooler cover 520 and is fixed.In addition, protrusion member 536 is disposed between the lower end and Defrost heater 532 of cold air return port 535.Thus, cannot see to the red-hot state in freezer, and when seeing from freezer inner side, protrusion member 536 is hidden in cold air return port 535 lower ends of cooler cover 520, therefore, contributes to good outward appearance and the raising of exterior quality.

As the cold-producing medium of freeze cycle in recent years, from earth environment, save the viewpoint of (environmental protection) from damage, use the little iso-butane as combustible refrigerant of greenhouse effects of the earth coefficient.Iso-butane as this hydrocarbon is compared with air, is the proportion (in 2.04,300K) of approximately 2 times under normal temperature, atmospheric pressure.Thus, compared with prior art, can reduce the loading of cold-producing medium, realize low-costly, and the amount of leakage when making combustible refrigerant just in case occurring to reveal reduces, and can further improve security.

In present embodiment, in cold-producing medium, use iso-butane, as explosion-proof countermeasure, the maximum temperature on the glass tube surface of the gabarit of the Defrost heater 532 that the Glass tube heater while having stipulated as defrosting forms.Therefore,, in order to reduce the temperature on glass tube surface, adopt the dual Glass tube heater that glass tube is formed to dual structure.In addition, as the method that reduces the temperature on glass tube surface, also can for example, at the high parts (, aluminium fin) of glass tube surface coiling thermal diffusivity.Now, by making glass tube, be substance structure, and can reduce the appearance and size of Defrost heater 532.

As the method that improves defrosting efficiency, also can be outside the Defrost heater 532 being formed by Glass tube heater, and use the pipe heater connecting airtight with cooler 507.Now, by the direct heat transfer from pipe heater, can carry out efficiently the defrosting of cooler 507.Because can melt the drain pan 334 of the surrounding that is attached to cooler 507 and the frost of cold air Air Blast fan 516 with Defrost heater 532, make it possible to realize the shortening of defrosting time, realize energy-conservationly, suppress the rising of the refrigeration storehouse temperature in defrosting time.

In addition,, when the Defrost heater 532 that combination consists of glass heater and pipe heater, by making mutual suitableization of heater capacity, can reduce the capacity of Defrost heater 532.If the temperature of the gabarit of the Defrost heater 532 when reducing heater capacity and can reduce defrosting, therefore, red-hot in the time of also can suppressing to defrost.

Then, the cooling of freezer is described.For example, lower floor's refrigerating chamber 505, due to the intrusion heat from outer gas and door switch etc., causes refrigerating storehouse temperature and rises, and refrigerating chamber sensor (without diagram) reaches start-up temperature when above, and compressor 517 startups, begin to cool down.The cold-producing medium of the HTHP of discharging from compressor 517, be disposed at the drier (without diagram) of mechanical type 519 in final arrival during, particularly in being arranged at the radiating tube of outer container 524 (without diagram), the heat exchange of outside air and the insulated body consisting of hard polyurethane foams 526 in freezer by outer container 524, is cooled and liquefies.

Then, the cold-producing medium of liquefaction is reduced pressure by capillary 518, flows into cooler 507, carries out heat exchange with air in the freezer of cooler 507 peripheries.Cold air after heat exchange is sent to cold air by near cold air Air Blast fan 516, by cooling in freezer in freezer.Afterwards, cold-producing medium is heated, gasifies, and gets back to compressor 517.In freezer, be cooled, the temperature of refrigerating chamber sensor (without diagram) arrives and stops temperature when following, and compressor 517 shuts down.

Cold air Air Blast fan 516 is also directly equipped on interior case 525 sometimes, but processes by being equipped on the foaming piece that the second heat insulation separating part 511 of assembling carries out parts afterwards, can realize the reduction of manufacturing cost.

During then, to the defrosting of freezer, describe.

Make freezer carry out cooling running, through after a while, and because of the airborne moisture of invading when the door switch, the moisture that is attached to the food of putting into freezer, also have from the moisture etc. that is stored in the vegetables of vegetable compartment 506, at cooler 507, be attached with frost.Along with the growth of this frost, between cooler 507 and circulation cold air, heat exchanger effectiveness reduces, can not be by fully cooling in freezer, and finally slow in freezing (chilly) or not cold state.Therefore,, in freezer, need to regularly remove the frost that is attached to cooler.

Freezer in present embodiment, also turns round, after certain hour, automatically defrosts at freezer.When defrosting, stop the running of compressor 517, cold air Air Blast fan 516, the Defrost heater 532 consisting of Glass tube heater is switched on.Cooler 507 is owing to being stranded in the cold-producing medium and white the melting that is attached to cooler 507 of cooler 507 inside, about through the sensible heat variation of-30 ℃ to 0 ℃, the latent heat variation of 0 ℃, from the sensible heat variation of 0 ℃ and intensification gradually.In cooler 507, defrosting sensor (without diagram) is installed, if reach the energising that set point of temperature stops Defrost heater 532 herein.In the present embodiment, Defrost heater stops the energising of Defrost heater 532 in the moment that detects 10 ℃.

Now, by the energising of Defrost heater 532, glass tube surface reaches a high temperature, by radiant heat melt be attached to cooler 507, cooler cooler 507 around the drain pan 534 of surrounding, the frost of cold air Air Blast fan 516, thus, make cooler 507 be restored (updating maintenance, refresh).

In addition, for example, in the low outer gas of 5 ℃ of left and right, even the frost of cooler 507 is defrosted fully, also can be due to the impact of outer gas, the temperature of the sensor that makes to defrost when defrosting is difficult to abundant intensification, has the elongated trend of defrosting time.Now, also can combine the state that 0 ℃ of above sensible heat changes of observing, if finish through above after a while the control that defrosts.Thus, thus can suppress in low outer gas the cooler 507 irrelevant with defrosting fully heat up not enoughly cause elongated, the unnecessary heater input of defrosting time, the cooling intensification that stops causing during to the photothermal intensification in freezer and defrosting.

As shown in the embodiment, vegetable compartment 506 is arranged at below, and lower floor's refrigerating chamber 505 is set in middle, and refrigerating chamber 502 is arranged at top, from easy to use and energy-conservation viewpoint, often uses the arrangement architecture of such freezer.In addition, from viewpoint and the use amount increase trend of following frozen food of freezer inner capacities, thereby sale increases the freezer that the freezer inner housing size of lower floor's refrigerating chamber 505 improves capacity.

Now, if increase freezer inner housing, with the size decreases of the cooler cover 520 at the back side, cooler 507 during defrosting, the temperature in cooler chamber 523 rise, and, due to the radiant heat from Defrost heater 532 and convection current, the temperature that is stored in the frozen food in refrigerating chamber is affected.Therefore, in present embodiment, by the heat transfer being formed by cooler front side cover 537 and cooler rear side cover 538 suppress space 539, the defrosting heating installation guide member 541 that is arranged at cold air return port 535 while suppressing defrosting to the heat affecting in freezer.In the present embodiment, the inside that makes conduct heat to suppress space 539 is air layer, even rise because the radiant heat from Defrost heater 532 causes cooler 507 temperature around, also can suppress to the heat conduction in freezer.Therefore, can reduce being stored in freezer, the particularly temperature impact of the food of cooler side, can suppress the deteriorated of food, can preserve for a long time.The pyroconductivity of air layer is approximately 0.03W/mK, and for example, refrigeration storehouse temperature be-25 ℃, and when cooler indoor temperature during defrosting rises to 20 ℃, heat insulation due to air layer, refrigerates storehouse temperature and only rise to-17 ℃.Now, the inside dimension in the thickness of air layer, i.e. heat transfer inhibition space 539 is 13.4mm.Thus, when defrosting, it is also that frozen food or ice cream melt, below-12 ℃ of quality badness that temperature rises, and therefore, in long-term preservation, also can suppress quality badness.

In addition, be not only the temperature impact on food in freezer, can also make the position that local temperature in freezer reduces reduce, therefore, from the distillations such as moisture that are attached to food, obtain moisture as white and be attached to the effect of cooler cover 520 while preventing door switch in addition or when food puts into.Thus, can guarantee the wet-out property of cooler 507, and, do not need to use for preventing the auxiliary heater of frost.

In addition, can reduce when defrosting to the temperature impact in freezer, also have the effect of freezer internal loading amount while reducing defrosting.Therefore, the cooling load amount after defrosting time reduces, and therefore, the running rotating speed that also can access cooling needed compressor 517 in the freezer after defrosting time lowers and shorten the duration of runs energy-saving effect bringing.

In addition, due to defrosting heating installation guide member 541 is tilted 45 ° configuration is installed with the angle making progress towards cooler 507 sides from freezer inner side, therefore, the convection current that the radiant heat of the Defrost heater 532 during from defrosting causes is easily moved to cooler 507, can melt efficiently the frost that is attached to cooler 507, therefore, realize the minimizing of the conduction time of Defrost heater 532, thereby electricity input reduction becomes energy-conservation.Now, due to the defrosting shortening of conduction time, thereby shorten non-cooling running time and suppress the temperature that heating that temperature rises, suppresses Defrost heater 532 self causes and rise, thus, cooling load amount after defrosting time reduces, therefore, also can access the energy-saving effect that running rotating speed lowers and the duration of runs, shortening brought of cooling needed compressor 517 in the freezer after defrosting time.

In addition, utilize defrosting heating installation guide member 541, the convection current causing from the radiant heat of the Defrost heater 532 in when defrosting is easily flowed to cooler 507, also has and suppresses heat to the effect flowing in freezer, the effect that also has the temperature that suppresses in freezer to rise.Be stored in the frozen food in freezer, what at the heating installation in when defrosting, to the impact that flows into the change of the frostbite that causes or heat in freezer, cause is deteriorated, but due to the effect of defrosting heating installation guide member 541, when long-term preservation, also can suppress the deteriorated of food.

In the present embodiment, upwards 45 ° of the angles of heating installation guide member 541 make to defrost, but the angle making progress also can consider to return the flow direction of cold air, the flow direction of the heating installation in when defrosting is enough, the easy degree of making of freezer inner capacities, mould etc., decides angle.

In addition, because the heating installation guide member 541 that makes to defrost is configured to one with cooler rear side cover 538, therefore can reduce fee of material and the mould expense of making defrosting heating installation guide member 541, and, the step in production process can be reduced.In addition, by forming the structure in cooler rear side cover 538, can make to comprise the simple shape of the pattern draft of mould, therefore, contribute to the further reduction of model expense.In addition, because the management of 2 parts from defrosting heating installation guide member 541 and cooler rear side cover 538 becomes the management of 1 parts, therefore, can reduce administrative expenses, the cost that realize to form goods, contributes to the reduction of selling price, raising that can enforcement sale rate.

In addition the drain pan inside-of-refrigerator end face 530 that, is positioned at as the defrosting heating installation guide member lower end 531 of lower end of defrosting guide member 541 the freezer inner side end that is compared to drain pan 534 is by cooler 507 sides.Thus, when the frost that is attached to cooler 507 in when defrosting is melted, can make the defrost water of dripping along cooler rear side cover 538 fall into reliably in drain pan 534.In present embodiment, making drain pan inside-of-refrigerator end face 530 and the distance of defrosting heating installation guide member lower end 531 is 15.8mm.This is the situation that arranges according to freezer, when freezer rolls forward oblique 15 °.The water droplet of defrost water drips to the size in drain pan 534.In fact, freezer state is set in while rolling forward oblique 15 °, be the size of freezer self overturning.Consider to form the size balanced of cooler 507 parts around, so long as present embodiment can make the defrost water of dripping fall into reliably in drain pan 534, therefore, water does not occur to the immersion of freezer inner side, high-quality freezer can be provided.

On the other hand, also can make to defrost heating installation guide member 541 is configured to one with cooler front side cover 537.Now, can obtain and same effect while being configured to one with cooler rear side cover 538.In present embodiment, the heating installation guide member 541 of making to defrost is configured to one with cooler rear side cover 538, still, expectation consider cooler cover 520 frame mode, make easy degree, mould structure, cost etc., implement optimum mode.

In addition, a part that is arranged at the wind direction guide portion 522 in the cold air return port 535 of cooler cover 520 belows has and defrosting heating installation guide member 541 equidirectional gradients, from freezer inner side towards cooler side, with angle configurations upward.Thus, when seeing in freezer, can see that the Defrost heater 532 that each wind direction guide portion forms with respect to Glass tube heater is overlapping, therefore, even while opening refrigerating chamber door when the defrosting of freezer, also cannot see the red-hot state of Defrost heater 532.In the present embodiment, the angle that the part of wind direction guide portion 522 is made progress is identical with the pattern draft of mould, but in the time of also can considering to return the flow direction of cold air and defrosting, the flow direction of heating installation decides angle.

In addition, the convection current causing from the radiant heat of the Defrost heater 532 in when defrosting, easily moves to cooler 507 via defrosting heating installation guide member 541, therefore, can further suppress to flow into the heating installation in freezer the efficiency in the time of can improving defrosting.

In addition, making a part and the defrosting heating installation guide member 541 of wind direction guide portion 522 is the equidirectional gradient making progress, therefore, the suction ventilation resistance that returns to cold air in the time of can suppressing cooling, therefore, also can increase air circulation, be increased in the heat exchange amount of cooler 507, make evaporating temperature increase, can realize by the raising of freeze cycle efficiency energy-conservation.In addition, the raising of heat exchange amount and the increase of air circulation by cooler 507, can reduce the time in cooling refrigeration storehouse, therefore, can reduce by the shortening of the cooling duration of runs to cooler 507 frost amount.Thus, extend the defrosting cycle of cooler 507, the interior cooling needed electric power input minimizing of freezer that realizes the input number of times minimizing of Defrost heater 532 and defrost after the refrigeration storehouse temperature rising causing, can further carry out energy-conservation.

In addition, the heating installation guide member 541 that makes to defrost is disposed between the upper end of cold air return port 535 or the lower end of fundamental profile shape and cooler lower end 544 of cooler rear side cover 538,, defrosting heating installation guide portion upper end 543 is positioned at than 544Gao position, cooler lower end, thus, increase the heat exchange area that returns to cold air and cooler 507.Thus, increase can be at cooler 507 area of frost, the deterioration of the cooling capacity in the time of can suppressing frost.Thus, can extend as operation freezer until need the defrosting cycle of the time of defrosting, in the freezer of realizing the input number of times minimizing of Defrost heater 332 and defrosting after the refrigeration storehouse temperature rising causing, cooling needed electric power input minimizing, can further carry out energy-conservation.

In addition,, if reduce flowing resistance, when cold air Air Blast fan 516 is same fan voltage, air circulation increases.The performance plot that represents flowing resistance and air quantity in Figure 21.As shown in figure 21, in the cooling performance of freezer, according to the characteristic of fan, flowing resistance is reduced to a little 1 → P1 → P2 of 2 air circulation increase to Q1 → Q2.

In addition, in the time of can guaranteeing performance with same air quantity, by reducing the rotation speed of the fan of cold air Air Blast fan 516, can access same air quantity.Now, move characteristic point 2 → 3, and the input of rotation speed of the fan sloping portion reduces, can be energy-conservation as electricity input.In addition, by rotation speed of the fan, reduce, can realize the reduction of the sound of the wind of cold air Air Blast fan 516, therefore, even in the low quiet environment of the ambient noises such as night, also can not notice noise.

In addition, for utilizing wind direction guide portion 522 and defrosting heating installation guide member 541 to suppress to flow into the heating installation in freezer, prevent in freezer frost be also effective.If the heating installation in freezer flows into many, particularly to the part with being communicated with in freezer and freezer inner top surface frost significantly occur, while having long-term use, when defrosting after a while and at every turn, frost part and drip, fall the possibility of freezer inner housing.According to the shape of present embodiment, because the inhibition that realization flows into the heating installation in freezer, so, general more than 10 years even if freezer is used, also can prevent the reliability decrease that frost causes, high-quality freezer can be provided.

The inhibition space 539 of conducting heat, defrosting heating installation guide member 541, wind direction guide portion 522, consist of suitably, the reduction of heat affecting in the freezer during by defrosting is, the raising of defrosting efficiency can be brought into play further energy-conservation effect.

In addition, in present embodiment, making formed heat transfer suppress interior volume is air layer, for example, the heat insulating member 542 forming by being heat-proof quality is high, pyroconductivity is low hard polyurethane foams, expanded polystyrene (EPS) (foamed styrene), polyethylene foamed, and can realize the reduction that further temperature affects, can bring into play better effect.

In addition, it is more than 60mm making the end face of Defrost heater 532 sides of wind direction guide portion 522 and the beeline of the glass tube gabarit of Defrost heater 532.Thus, the temperature that can suppress the cooler cover 520 self of the formation cold air return port 535 that causes from the radiant heat of Defrost heater 532 due to when defrosting rises, therefore, even the distortion that the temperature impact that does not also occur to be caused by radiant heat when when defrosting etc. excessively extends defrosting time causes etc.In addition, owing to making beeline, be more than 60mm, therefore, the heating installation from Defrost heater 532 during defrosting flows into cooler side, and the inflow in freezer can be easily suppressed, plays this effect.

In addition, in present embodiment, the kind of cold-producing medium is used to iso-butane, therefore, the temperature on the glass tube surface of the Defrost heater 532 during defrosting regulation is for 394 ℃ Celsius.In addition, the PP (polypropylene) of the cooler cover 520 using in present embodiment and the materials'use cheapness of wind direction guide portion 522, the heat-resisting melting temperature of PP is 200 ℃ approximately Celsius, ignition temperature is 440 ℃ approximately Celsius.But, consider actual use, heat resisting temperature is set as to 135 ℃ Celsius.That is, consider worst case, the glass tube surface temperature of calculating Defrost heater 532 is that 394 ℃ Celsius, materials'use PP, heat resisting temperature are 135 ℃ of sizes when following Celsius, and it is more than 60mm making above-mentioned beeline.In above-mentioned calculating, according to this special fence-Boltzmann law, derive.

(the tenth embodiment)

Figure 22 is the cooler chamber detailed cross sectional view of the freezer of the tenth embodiment of the present invention.

Figure 23 is that Figure 23 is the back view of cooler cover of the freezer of the tenth embodiment of the present invention.Figure 24 is the key diagram of basic heat exchange department of cooler of the freezer of the tenth embodiment of the present invention.

As shown in Figure 22 to Figure 24, have and be arranged at the back side of freezer main body, generate the cooler 607 of cold air and be arranged at the below of cooler 607, the Defrost heater 632 being formed by Glass tube heater.Below Defrost heater 632, be provided with being attached to that the frost of cooler 607 melts and the defrost water that falls receives, form as one with the lower surface of lower floor's refrigerating chamber 605 drain pan 634.In addition, dispose the cooler cover 620 that covers cooler 607, wherein, cooler cover 620 possesses the cold air return port 635 that the cold air for making lower floor's refrigerating chamber 605 cooling returns to cooler 607.

Cooler cover 620 consists of the cooler front side cover 637 of freezer inner side and the cooler rear side cover 638 of cooler 607 sides, possesses the heat transfer consisting of cooler front side cover 637 and cooler rear side cover 638 suppress space 639 in the place ahead of cooler 607.Between the outlet lower end of the upper end Dao Xiang lower floor refrigerating chamber 605 of the cold air return port 635 that heat transfer inhibition space 639 possesses in the bottom from cooler cover 620, form.If the height in heat transfer inhibition space 639 is positioned at the upper end of cooler 607, there is the thermally-inhibited effect of biography, can balance high according to freezer inner capacities and shell dimension decide position.In the present embodiment, conduct heat and suppress the height in space, flowing of the heating installation while considering defrosting, is approximately positioned at from the downside of cooler 607 and plays the 3rd section, till the outlet lower end of lower floor's refrigerating chamber 605.In addition, the inside in heat transfer inhibition space 639 is air layer.

Therefore, utilization is from the radiant heat of the Defrost heater 632 in when defrosting, the frost that is attached to cooler 607 is melted, form the heating installation of high humidity, by free convection, in the indoor rising of cooler, now, a part for heating installation flows in freezer, still, can suppress space 639 inhibition by heat transfer and make its inflow space inner to the inflow in freezer., Japanese in the situation that, be particularly the high environment of humidity, frost is easily attached to cooler 607, from refrigerating chamber or refrigerating chamber return cold air initial with cooler 607 heat exchanges and dehumidified, the bottom of this cooler 607 is to adhere to white maximum position.Therefore, in the initial stage in when defrosting, the heating installation after defrosting is for easily flowing into and easily to the state flowing in freezer to the surrounding of cooler 607, but suppress space 639 by heat transfer, can suppress to the inflow in freezer.In addition, utilizing conducts heat suppresses space 639, with respect to the radiant heat due to from Defrost heater 632, make the environment temperature of cooler 607 increase, can suppress to the heat conduction in freezer, therefore, can reduce on being stored in the particularly temperature of the food of the inside of cooler 607 sides impact in freezer, therefore, can suppress the deteriorated of food, can preserve for a long time.

In the present embodiment, the inside that suppresses space 639 in order to make to conduct heat is communicated with cooler chamber 623, at cooler cover 638, forms heating installation recovery holes 646.Conventionally, forming conducts heat suppresses the cooler front side cover 637 in space 639 and the space intake section of cooler rear side cover 638, and basic size is below 3mm.Combine with the effect of defrosting heating installation guide member 641, convection current that radiant heat due to the Defrost heater 632 from when defrosting causes does not occur invades to conduct heat and suppresses in space 639, but, chimeric deviation during due to the compact dimensions deviation of parts self and goods assembling, heating installation can enter into conduct heat and suppress in space 639 sometimes.But, utilize heating installation recovery holes 646, entering the heating installation that conduct heat to suppress in space 639 and suppressing heating installation in space 639 and expand and reach spatial volume when above, the 623 sides discharge heating installation to cooler chamber because the radiant heat from Defrost heater 632 is present in to conduct heat.Thus, suppress heating installation to the inflow of freezer inner side.

In addition, the position of heating installation recovery holes 646 is the position being communicated with in the more lateral, perspective plane in the place ahead of the basic heat exchange department 648 of cooler from forming with finned tube.Therefore thus, when cooling running, form outside the main flow of cold air, return to cold air and cooler 607 carries out heat exchange, after becoming discharge cold air, by heating installation recovery holes 646, then be prevented with the short circuit of returning to cold air interflow, can prevent that the heat exchanger effectiveness of cooler 607 from reducing.

Herein, the area of heating installation recovery holes 646 (Sk) is for being less than the relation of the fundamental profile area (Sd) in the inhibition space 639 of conducting heat.That is, the relation of Sd > Sk.In addition, in present embodiment, in the inhibition space 639 of conducting heat, set a plurality of heating installation recovery holes 646, can make does not have silted land to discharge to cooler chamber side at the heating installation that suppresses to be detained in space that conducts heat when defrosting.In present embodiment, heating installation recovery holes 646 is disposed at the two end portions of cooler 607.Now, for the area of heating installation recovery holes 646, establishing n heating installation recovery holes, while representing with Skn, is Sd > Σ Skn.Heating installation from from heating installation recovery holes 646 to cooler chamber 623 reclaims, the heating installation that the radiant heat of the Defrost heater 632 when from defrosting flows into, due to the temperature rising in space, pressure rise, higher than the pressure of bulky cooler chamber side.Therefore, due to pressure differential, a part for the heating installation in the inhibition space of conducting heat is from heating installation recovery holes 646 to cooler chamber side flow, and the heating installation suppressing in space that can make to conduct heat does not flow out to freezer inner side, the temperature suppressing in freezer rises, and the freezer of energy saving excellence can be provided.And, because the heating installation that can reduce in freezer flows into the variations in temperature causing, can suppress the deteriorated of the weak food such as frozen food of temperature change, can preserve for a long time.

In addition, as present embodiment, make heating installation recovery holes 646 for a plurality of, for example set, as (keeping isostasy, left and right is impartial), thus, heating installation can be reclaimed efficiently, alluvial (delay) can be reduced, therefore, even in the freezer that particularly capacity is large, width is wide, when the size of cooler 607 is large, also can access effect.

In addition, by the inside conduct heat suppressing space 639, setting heat transfer component 647, making to dehumidify and become possibility being stranded in the heating installation that suppresses interior volume of conducting heat.Heat transfer component 647 can be used metal material.In present embodiment, consider cost, attach the aluminium foil of t=8 μ m, still, when the aluminium sheet, pyroconductivity that is greater than aluminium foil with thickness for example, forms higher than the material (copper) of aluminium, can further bring into play as the effect of conducting heat.In addition, in heat transfer component 647, use heat-storing material also passable.Now, not only dehumidifying, due to cooling heat-storing material of cooling when running, when defrosting, the temperature suppressing in space of conducting heat is difficult to rise, therefore, the temperature that can significantly suppress in freezer rises, can suppress the deteriorated of food, preservation that can longer-term, and the freezer of energy saving excellence can be provided.

In addition,, in present embodiment, the upper end of heating installation recovery holes 646 suppresses space to conducting heat and rolls tiltedly, and lower end rolls tiltedly to cooler chamber.Thus, the heating installation that being stranded in during defrosting conducts heat suppresses in space is mobile to top by the ascending air of free convection, but because the top and bottom of heating installation recovery holes 646 tilt, therefore, reduces wind path resistance, and silted land is not discharged to cooler chamber side.In addition, because the top and bottom of heating installation recovery holes 646 tilt, therefore, the yield rate while realizing the parts that moulding forms is improved, and suppresses die cost, contributes to cost.

The present invention possesses: freezer main body; The refrigerating chamber of the cryogenic temperature band in freezer; Cooler chamber, this cooler chamber has: be arranged at refrigerating chamber cooler rear side, that generate cold air, be arranged at cooler below Defrost heater and be positioned at Defrost heater below, receive that the frost that is attached to cooler melts and the drain pan of the defrost water that falls.Be provided with the cooler cover that covers cooler, there is the cold air return port that the cold air for making refrigerating chamber cooling returns to cooler.Make the center of Defrost heater be positioned in the horizontal direction the top of refrigerating chamber lower surface, at refrigerating chamber lower surface, dispose to freezer inner side (side in storehouse) outstanding protrusion member, the upper end of cold air return port lower end and protrusion member is overlapping in short transverse.

Thus, in the time of can being difficult to see defrosting, from the red-hot state of Defrost heater, therefore, while opening refrigerating chamber door when the defrosting of freezer, can to user, not produce uneasy sense due to the red-hot state of Defrost heater.

In addition, the interval that separates cooling return port lower end and protrusion member by sky, make from freezer to the cold air that returns of cooler, not only can guarantee that the convection current before return port also can be guaranteed from the convection current of cooler downside, therefore, can increase the heat exchange area in cooler.In addition, return to the flowing resistance of cold air by reduction, can increase air circulation, the heat exchange amount increasing in cooler rises evaporating temperature, thereby improves freeze cycle efficiency, thus, can realize energy-conservation.

In addition, the raising of heat exchange amount and the increase of air circulation by cooler, can reduce the time in cooling refrigeration storehouse, therefore, also can due to shorten cooling duration of runs reduces to cooler frost measure.Thus, can extend the defrosting cycle of cooler, the interior cooling needed input minimizing of freezer that realizes the input number of times minimizing of Defrost heater and defrost after the refrigeration storehouse temperature rising causing, thus can further carry out energy-conservation.

In addition, increasing the heat exchange area of cooler by the improvement of wind path, is to increase at cooler, the area of frost, therefore, and the deterioration of cooling capacity in the time of can suppressing frost.Thus, can extend as operation freezer until need the defrosting cycle of the time of defrosting, in the freezer of realizing the input number of times minimizing of Defrost heater and defrosting after the refrigeration storehouse temperature rising causing, cooling needed input reduces, thereby can further carry out energy-conservation.

In the present invention, make the space length of protrusion member and cold air return port lower end be greater than the height of protrusion member.

Thus, can increase from freezer to the aperture area that returns to cold air of cooler, further reduce flowing resistance, therefore, when same fan voltage, air circulation increases, the heat exchange amount in cooler increases, and can further realize energy-conservation.

In the present invention, protrusion member is configured between cold air return port lower end and Defrost heater.

Thus, except wind path improves the energy-saving effect obtain, white endurance improves, also cannot see the red-hot state in freezer, and, while seeing from freezer inner side, protrusion member is hidden in the cold air return port lower end of cooler cover, therefore contributes to the raising of good outward appearance grade.

In the present invention, protrusion member is contacted with a part that forms the cooler cover of cold air return port.

Thus, can increase cold air return port and the periphery of holding yielding cold air return port during opening is fixed, therefore, can limit the size of cold air return port, guarantee peristome area, thereby bring into play sufficient cooling effect.In addition, during installation, operator makes cooler cover be connected to protrusion member by mark protrusion member to operate, and can improve operability and realize the shortening of operating time.Therefore, can make goodization of yield rate, suppress product deviation, can guarantee stable cooling performance.

In the present invention, refrigerating chamber lower surface and drain pan are configured to one.

Thus, fee of material and the model expense (mould expense) of making protrusion member can be reduced, and the step of manufacturing process can be reduced.In addition, because the management of 2 parts from protrusion member and drain pan becomes the management of 1 parts, therefore, can reduce administrative expenses, realize the reduction as the cost of goods, contribute to the reduction of selling price, thus raising that can enforcement sale rate.

In the present invention, in cold air return port, be provided with a plurality of wind direction guide portion, the inner of each wind direction guide portion of the top of wind direction guide portion is positioned at than the high position of line that each center inner and Defrost heater of wind direction guide portion is coupled together.

Thus, when seeing in freezer, each wind direction guide portion is overlapping with respect to Defrost heater, therefore, also cannot see the red-hot state of Defrost heater while opening the door of refrigerating chamber when the defrosting of freezer.In addition, also have the radiant heat from Defrost heater while suppressing defrosting to flow into the effect in freezer, play the effect of the temperature rising that can suppress in freezer.Now, by each wind direction guide portion, the current of warm air that heat during defrosting causes, to cooler side, therefore, can be realized the raising of defrosting efficiency, can realize defrosting time and shorten the energy-saving effect bringing.

In the present invention, be provided with a plurality of wind direction guide portion in cold air return port, a plurality of wind direction guide portion are done than top wind direction guiding minister in Defrost heater side by bottom wind direction guide portion.

Thus, not only make the flowing resistance of cold air return port reduce, realize cooling capacity and improve, the heating installation in freezer that the radiant heat of the Defrost heater in the time of can also easily suppressing from defrosting causes flows into.

In the present invention, be provided with a plurality of wind direction guide portion in cold air return port, the line that the end face of the freezer inner side of a plurality of wind direction guide portion is coupled together is parallel with the box back surface in freezer.

Thus, can guarantee to make freezer inner housing (storehouse inner housing) and being spaced apart of cold air return port certain more than, local narrowing down not, because the air quantity not causing because of the flowing resistance increase of wind path declines.Therefore, can not cause the decline of cooling capacity.In addition, owing to not hindering the circulation of cold air, therefore, even if because of the invasion of the high outer gas of humidity make surface frost, also without alluvial, therefore easily distil.In addition, due to the trend that has in recent years actual volume to increase, increase as far as possible freezer inner housing, contribute to the raising of selling, pattern draft owing to making moulding freezer inner housing is parallel with the line of freezer inner side end that connects wind direction guide portion, and can realize the actual content to greatest extent long-pending (inner capacities) of having cut down idle space.

In the present invention, it is more than 60mm making the cold air return port of Defrost heater side and the beeline of Defrost heater gabarit.

Thus, the temperature that can suppress the cooler cover self of the formation cold air return port that causes from the radiant heat of Defrost heater due to when defrosting rises, therefore, even the distortion that the temperature impact that does not also occur to be caused by radiant heat when when defrosting etc. excessively extends defrosting time causes.In addition, owing to making beeline, be more than 60mm, therefore, during defrosting, from the heating installation of Defrost heater, flow into cooler side, play and suppress at an easy rate the effect that flows in freezer.

In the present invention, make protrusion member and cooler cover be configured to one.

Thus, can reduce fee of material and the mould expense of making protrusion member, and, the step in production process can be reduced.In addition, can reduce administrative expenses, realize form the cost of goods, contribute to the reduction of selling price, raising that can enforcement sale rate.

In the present invention, make protrusion member and refrigerating chamber lower surface be configured to one.

The present invention possesses: cooler rear side, that generate cold air that is arranged at refrigerating chamber, be arranged at the Defrost heater of the below of cooler, and cover cooler and there is the cooler cover of the cold air return port that the cold air for making refrigerating chamber cooling returns to cooler.Cooler cover consists of the cooler front side cover of freezer inner side and the cooler rear side cover of cooler side, in cooler the place ahead, possess by cooler front side cover and the hood-shaped heat transfer becoming of cooler rear side and suppress space, at cold air return port, be provided with the heating installation guide member that defrosts.

By defrosting heating installation guide member is set at cold air return port, the convection current that during from defrosting, the radiant heat of Defrost heater causes is easily moved to cooler, melt efficiently the frost that is attached to cooler, therefore, realize the minimizing of the conduction time of Defrost heater, thereby electricity input reduction becomes energy-conservation.Now, due to the defrosting shortening of conduction time, shortening the temperature that thereby the rising of inhibition temperature suppresses, the heating of inhibition Defrost heater self causes non-cooling running time rises, thus, cooling load amount after defrosting time reduces, therefore, also can access the energy-saving effect that running rotating speed lowers and the duration of runs, shortening brought of cooling needed compressor in the freezer after defrosting time.

In addition, utilize defrosting heating installation guide member, the convection current that the radiant heat of the Defrost heater during from defrosting causes is easily flowed to cooler, also has and suppresses heat to the effect flowing in freezer, therefore plays the effect that the temperature that suppresses in freezer rises.Be stored in the frozen food in freezer, it is deteriorated that heating installation during defrosting causes to the impact that flows into the change of the frostbite that causes or heat in freezer, due to the effect of defrosting heating installation guide member, when long-term preservation, also can suppress the deteriorated of food.

In addition,, by the cooler cover consisting of cooler front side cover and cooler rear side cover is set, even the radiant heat from Defrost heater causes that cooler temperature around rises when defrosting, also can suppress to conduct to the heat in freezer.Therefore, can reduce being stored in freezer, the particularly temperature impact of the food of the inside of cooler side (depth side), can suppress the deteriorated of food, can preserve for a long time.

In addition, by arranging to conduct heat, suppress space, can suppress the heat affecting from the cooler as low temperature, reduce the temperature on cooler cover surface and the temperature difference in freezer, therefore, the distillation that is attached to the moisture of food when door switch and when putting in freezer causes flows into it, also can suppress adhering to of frost.

In the present invention, in the inside in the inhibition space of conducting heat, set heat insulating member.

Thus, because the radiant heat from Defrost heater causes cooler temperature around, rise, also can significantly suppress cooler from temperature rises around to the heat conduction in freezer.Therefore, can reduce being stored in freezer, the particularly temperature impact of the food of cooler side, therefore can suppress the deteriorated of food, can further realize long-term preservation.

In addition, when defrosting, can suppress the cooler that risen from temperature is around that to instigate radiant heat from Defrost heater to be stranded in cooler indoor to the heat conduction in freezer, can make efficiently cooler self temperature increase, thereby follow the shortening of defrosting time and shorten the non-cooling duration of runs and suppress temperature rising, can realize further energy-conservation.

In addition, because the inside in the inhibition space of conducting heat sets heat insulating member, reduce the temperature impact from cooler, therefore, reduce at the position that local temperature reduces in freezer, white the adhering to that the moisture in the time of can preventing door switch etc. in intrusions freezer causes, the quality raising of goods.

In the present invention, the heating installation guide member upper end that makes to defrost is positioned at the position higher than cooler lower end.

Thus, can increase and return to cold air with respect to the heat exchange area of cooler, and reduce the flowing resistance of returning to cold air, thus, can increase air circulation, increase the heat exchange amount in cooler, evaporating temperature rises, and improves freeze cycle efficiency, thereby can realize energy-conservation.

In addition, the raising of heat exchange amount and the increase of air circulation by cooler, can reduce the time in cooling refrigeration storehouse, therefore, also can the shortening by the cooling duration of runs reduce to cooler frost amount.Thus, can extend the defrosting cycle of cooler, the interior cooling needed electric power input minimizing of freezer that realizes the input number of times minimizing of Defrost heater and defrost after the refrigeration storehouse temperature rising causing, can further carry out energy-conservation.

In addition, increasing the heat exchange area of cooler by the improvement of wind path, is to increase at cooler, the area of frost, therefore, and the deterioration of cooling capacity in the time of can suppressing frost.Thus, can extend as operation freezer until need the defrosting cycle of the time of defrosting, in the freezer of realizing the input number of times minimizing of Defrost heater and defrosting after the refrigeration storehouse temperature rising causing, cooling needed electric power input minimizing, can further carry out energy-conservation.

In the present invention, make to defrost heating installation guide member and cooler front side cover are configured to one.

Thus, can reduce fee of material and the mould expense of making defrosting heating installation guide member, and, the step in production process can be reduced.In addition, can reduce administrative expenses, realize form the cost of goods, contribute to the reduction of selling price, raising that can enforcement sale rate.

In the present invention, make to defrost heating installation guide member and cooler rear side cover are configured to one.

Thus, can reduce fee of material and the mould expense of making defrosting heating installation guide member, and, the step in production process can be reduced.In addition, by forming the structure in cooler rear side cover, can make to comprise the simple shape of the withdrawing pattern of mould, therefore, contribute to the further reduction of model expense.In addition, because the management of 2 parts from defrosting heating installation guide member and cooler rear side cover becomes the management of 1 parts, therefore, can reduce administrative expenses, the cost that realize to form goods, contributes to the reduction of selling price, raising that can enforcement sale rate.

In the present invention, in the cooler side of cold air return port, wind direction guide portion is set, wind direction guide portion has the gradient towards top with respect to the entrance of return port.

Thus, can see that each wind direction guide portion is overlapping with respect to Defrost heater when seeing in freezer, therefore, even while opening refrigerating chamber door when the defrosting of freezer, also cannot see the red-hot of Defrost heater.In addition, the radiant heat that also has a Defrost heater while suppressing from defrosting is to the effect flowing in freezer, and the temperature suppressing in freezer rises.Now, utilize each wind direction guide portion, the heating installation that radiant heat during defrosting causes, to cooler side flow, therefore, is also realized the raising of defrosting efficiency, also realizes defrosting time and shortens the energy-saving effect bringing.

In addition, because wind direction guide portion is upper direction with the inclination of defrosting heating installation guide member, therefore, except reducing the flowing resistance of the suction wind path that returns to cold air, can also make the homogenising that flows, further energy-conservation by the raising realization of cooling effectiveness.

In the present invention, making the Defrost heater side of cooler cover and the beeline of Defrost heater gabarit is 60mm.

Thus, the temperature that can suppress the cooler cover self of the formation cold air return port that causes from the radiant heat of Defrost heater due to when defrosting rises, therefore, even the distortion that the temperature impact that does not also occur to be caused by radiant heat when when defrosting etc. excessively extends defrosting time causes.In addition, owing to making beeline, be more than 60mm, therefore, during defrosting, from the heating installation of Defrost heater, flow into cooler side, have and easily suppress the effect that flows in freezer.

In the present invention, being centered close at the bottom of refrigerating chamber on basic side of Defrost heater.

Thus, the drain pan can Shi Yu lower floor refrigerating chamber forming as one below be shaped as approximate horizontal, can reduce for the idle space of Defrost heater is set, can realize the increase of internal volume.In addition, can make the degree of depth of drain pan shoal, the die cost in the time of can suppressing component parts moulding, therefore, also contributes to cost.

In the present invention, in the cooler side of cooler rear side cover, possesses metal heat transfer promoting member.

Thus, the radiant heat of the Defrost heater in the time of can making to defrost is passed to the top of cooler, therefore, can realize the further shortening of defrosting time.In addition, because heat transfer promoting member is metal system, heat conduction efficiency is high, can make the hot Transmit evenly from Defrost heater.Therefore, hot Transmit evenly in cooler, therefore, not only defrosting efficiency improves, and also there is no the residual worry of frost.

In the present invention, wind direction guide portion and defrosting heating installation guide member are linked.

Thus, form and link wind direction guiding piece with the equidirectional wind direction guide portion upwards forming of defrosting heating installation guide member, therefore, the convection current that the radiant heat of the Defrost heater during from defrosting causes is more easily flowed to cooler, melt efficiently the frost that is attached to cooler, therefore, realize the minimizing of the conduction time of Defrost heater, realize energy-conservation that the electric reduction of inputting brings.

In addition, the radiant heat of the Defrost heater while suppressing from defrosting also becomes greatly to the effect flowing in freezer, has the effect of the temperature rising in further inhibition freezer.

In the present invention, possess and be communicated with conduct heat inhibition space and the heating installation recovery holes of taking in the cooler chamber of cooler.

Thus, forming conducts heat suppresses the cooler front side cover in space and the space intake section of cooler rear side cover, and basic size is below 3mm.Be combined with the effect of defrosting heating installation guide member, convection current that radiant heat due to the Defrost heater from when defrosting causes does not occur invades to conduct heat and suppresses in space, but the chimeric deviation during due to the compact dimensions deviation of parts self and goods assembling, heating installation enters to conduct heat and suppresses in space sometimes.Now, entering the heating installation that conduct heat to suppress in space and suppressing heating installation in space and expand and reach spatial volume when above because the radiant heat from Defrost heater is present in to conduct heat, can suppress to side inflow in freezer.Excessive temperature in the space that in addition, can suppress to cause due to radiant heat rises.Therefore, can reduce being stored in the particularly temperature of the food of cooler side impact in freezer, therefore, can suppress the deteriorated of food, can preserve for more time.

In the present invention, make heating installation recovery holes be equipped on the outside of the basic heat exchange department of cooler.

Thus, during the cooling running of freezer, invade to conduct heat by heating installation recovery holes with the cold air after cooler heat exchange and suppress in space, then with from returning to cold air interflow in freezer, can prevent short circuit (short circuit, shortcut), can prevent that the heat exchanger effectiveness of cooler from reducing.

In the present invention, make the area of heating installation recovery holes be less than the fundamental profile area that heat transfer suppresses space.

Thus, chimeric deviation during due to the compact dimensions deviation of parts self and goods assembling, from when defrosting Defrost heater the convection current that causes of radiant heat and invade to conduct heat and suppress the heating installation in space, because the temperature in space rises, pressure rise, the pressure of the cooler chamber side that specific volume is large is high, utilizes pressure differential, and a part for the heating installation in the inhibition space of conducting heat is from heating installation recovery holes to cooler chamber side flow.Therefore, the heating installation suppressing in space that conducts heat does not flow out to freezer inner side, and therefore, the temperature that can suppress in freezer rises.

In the present invention, possess a plurality of heating installation recovery holes.

Thus, during defrosting, being stranded in the heating installation that conduct heat to suppress in space because pressure differential flows to cooler chamber from a plurality of heating installation recovery holes, therefore, particularly the wide freezer of width also can balancedly keep heat transfer to suppress the pressure in space, realize the reduction of alluvial, can suppress to flow into and temperature rising to the heating installation in freezer.

In the present invention, in the inside in the inhibition space of conducting heat, set heat transfer component.

Thus, though when defrosting high humility heating installation be stranded in and conduct heat while suppressing in space, dehumidifying when chilled heat transfer component defrosts in the time of can utilizing cooling running, suppresses by heating installation recovery holes heating installation to the inflow in cooler chamber and freezer.Therefore, there is no the residual and residual generation of ice of frost of part, the high freezer of quality of goods reliability can be provided.

In the present invention, the upper end of heating installation recovery holes is tilted below the inhibition space side direction of conducting heat.

Thus, during defrosting, being stranded in conducts heat suppresses the heating installation in space, the guide rail shape of utilizing upper end side to tilt, easily Directed cooling device chamber side.

In the present invention, the lower end of heating installation recovery holes is tilted above the side direction of cooler chamber.

Thus, during defrosting, being stranded in conducts heat suppresses the heating installation in space, the guide rail shape of utilizing lower end side to tilt, easily Directed cooling device chamber side.

Industrial utilizability

As mentioned above, the present invention can follow the large capacity of save space subduing dead volume and increase freezer inner capacities, utilizes in improving the home-use freezer that energy saving is object take.

Symbol description

1,11,21,35 coolers

2,15,22,32 refrigerating chambers

3,23,33 cooler chambers

4,12,24,31 cooler covers

5,25,41 interior casees

6,26 cold air return ports

7,27 Defrost heaters

8 vegetable compartment

9 separating parts

10 guide portion (guide part)

13,37 Defrost heaters

14,36 cover heaters

28 heating installation inflow spaces

34 fans

38 water acceptance divisions

39 cooler chamber inlets

40 pipelines (emissions groove)

42 guide portion

101,301,501 freezer main bodys

102,302,502 refrigerating chambers

102a, 302a, 502a refrigerating-chamber door

103,303,503 upper strata refrigerating chambers

103a, 303a, 503a upper strata refrigerating chamber door

104,304,504 ice-making compartments

104a, 304a, 504a ice-making compartment door

105,305,355,405,455,505,605 lower floor's refrigerating chambers

105a, 305a, 505a lower floor refrigerating chamber door

106,306,506 vegetable compartment

106a, 306a, 506a vegetable compartment door

107,307,407,507 coolers

108,308,508 first top parts

109,309,509 second top parts

110,310,510 first heat insulation separating parts

111,311,511 second heat insulation separating parts

112,312,512 the 3rd heat insulation separating parts

113,163,213,263,313,363,513 the 4th heat insulation separating parts

116,316,516 cold air Air Blast fans

117,317,517 compressors

118,318,518 capillaries

119,319,519 Machine Rooms

120,170,270,320,470,520 cooler covers

122,222,272,322,372,422,472,522 wind direction guide portion

123,323,523,623 cooler chambers

124,324,524 outer containers

125,325,525 interior casees

126,326,526 insulated body

132,182,232,282,332,382,432,482,532,632 Defrost heaters

133,283,333,433,533 cover heaters

134,184,234,284,334,384,484,434,534,634 drain pans

135,185,235,285,335,385,435,485,535,635 cold air return ports

136,186,236,286,336,536 protrusion members

155,205,255 refrigerating chambers

157,257,207,357,457,607 coolers

220,370,420,620 cooler covers

337,487,537,637 cooler front side covers

338,488,538,638 cooler rear side covers

339,539,639 heat transfers suppress space

340,540 heat transfer promoting members

343,543 defrosting heating installation guide portion upper ends

344,544 cooler lower ends

341,391,441,491,541,641 defrosting heating installation guide members

495 link wind direction guiding piece

530 drain pan inside-of-refrigerator end faces

531 defrosting heating installation guide member lower ends

646 heating installation recovery holes

647 heat transfer components

The basic heat exchange department of 648 cooler

Claims

1. a freezer, is characterized in that, possesses:

Freezer main body;

The refrigerating chamber of the cryogenic temperature band in described freezer;

Cooler chamber, this cooler chamber have be arranged at described refrigerating chamber cooler rear side, that generate cold air, be arranged at described cooler below Defrost heater and be positioned at described Defrost heater below, receive that the frost that is attached to described cooler melts and the drain pan of the defrost water that falls; With

Cooler cover, this cooler cover covers described cooler and has the cold air return port that the cold air for making described refrigerating chamber cooling returns to described cooler,

The center of described Defrost heater is positioned at the top of refrigerating chamber lower surface in the horizontal direction,

At described refrigerating chamber lower surface, dispose to side-prominent protrusion member in freezer,

The upper end of described cold air return port lower end and described protrusion member is overlapping in short transverse.

2. freezer as claimed in claim 1, is characterized in that:

Make the space length of described protrusion member and described cold air return port lower end be greater than the height of described protrusion member.

3. freezer as claimed in claim 1 or 2, is characterized in that:

Described protrusion member is configured between described cold air return port lower end and described Defrost heater.

4. freezer as claimed in claim 1 or 2, is characterized in that:

Described protrusion member is contacted with a part that forms the described cooler cover of described cold air return port lower end.

5. freezer as claimed in claim 1 or 2, is characterized in that:

Described refrigerating chamber lower surface and drain pan are configured to one.

6. freezer as claimed in claim 1 or 2, is characterized in that:

In described cold air return port, be provided with a plurality of wind direction guide portion,

The inner of each wind direction guide portion of the top of described wind direction guide portion is positioned at than the high position of line that each center inner and described Defrost heater of described wind direction guide portion is coupled together.

7. freezer as claimed in claim 1 or 2, is characterized in that:

A plurality of described wind direction guide portion are done than top wind direction guiding minister in described Defrost heater side by bottom wind direction guide portion.

8. freezer as claimed in claim 1 or 2, is characterized in that:

The line that the end face of the freezer inner side of a plurality of described wind direction guide portion is coupled together is parallel with the box back surface in freezer.

9. freezer as claimed in claim 1 or 2, is characterized in that:

It is more than 60mm making the cold air return port of described Defrost heater side and the beeline of described Defrost heater gabarit.

10. freezer as claimed in claim 1 or 2, is characterized in that:

Described protrusion member and described cooler cover are configured to one.

11. freezers as claimed in claim 1 or 2, is characterized in that:

Described protrusion member and described refrigerating chamber lower surface are configured to one.

12. 1 kinds of freezers, is characterized in that possessing:

Freezer main body;

Be arranged at cooler rear side, that generate cold air of described refrigerating chamber;

Be arranged at the Defrost heater of the below of described cooler; With

Described cooler cover consists of the cooler front side cover of freezer inner side and the cooler rear side cover of cooler side, in described cooler the place ahead, have by described cooler front side cover and the hood-shaped heat transfer becoming of described cooler rear side and suppress space, at described cold air return port, be provided with the heating installation guide member that defrosts.

13. freezers as claimed in claim 12, is characterized in that:

The inside that suppresses space in described heat transfer is equipped with heat insulating member.

14. freezers as described in claim 12 or 13, is characterized in that:

Described defrosting heating installation guide member upper end is positioned at than high position, described cooler lower end.

15. freezers as described in claim 12 or 13, is characterized in that:

Described defrosting heating installation guide member and described cooler front side cover are configured to one.

16. freezers as described in claim 12 or 13, is characterized in that:

Described defrosting heating installation guide member and described cooler rear side cover are configured to one.

17. freezers as described in claim 12 or 13, is characterized in that:

Described cold air return port is provided with wind direction guide portion in cooler side, and described wind direction guide portion has the gradient towards top inclination with respect to the entrance of return port.

18. freezers as described in claim 12 or 13, is characterized in that:

Making the described Defrost heater side of described cooler cover and the beeline of described Defrost heater gabarit is 60mm.

19. freezers as described in claim 12 or 13, is characterized in that:

Being centered close at the bottom of described refrigerating chamber on basic side of described Defrost heater.

20. freezers as described in claim 12 or 13, is characterized in that:

Described cooler side at described cooler rear side cover has metal heat transfer promoting member.

21. freezers as claimed in claim 17, is characterized in that:

Described wind direction guide portion and described defrosting heating installation guide member are linked.

22. freezers as claimed in claim 12, is characterized in that:

Possess and be communicated with the heating installation recovery holes that described heat transfer suppresses space and takes in the cooler chamber of described cooler.

23. freezers as claimed in claim 22, is characterized in that:

Described heating installation recovery holes is compared and is equipped on more lateral with the basic heat exchange department of described cooler.

24. freezers as described in claim 22 or 23, is characterized in that:

The area of described heating installation recovery holes is less than the fundamental profile area that described heat transfer suppresses space.

25. freezers as described in claim 22 or 23, is characterized in that:

Possess a plurality of described heating installation recovery holes.

26. freezers as described in claim 22 or 23, is characterized in that:

The inside that suppresses space in described heat transfer is equipped with heat transfer component.

27. freezers as described in claim 22 or 23, is characterized in that:

The upper end of described heating installation recovery holes suppresses to tilt below the side direction of space in described heat transfer.

28. freezers as described in claim 22 or 23, is characterized in that:

The lower end of described heating installation recovery holes tilts above the side direction of described cooler chamber.