CN108139137A

CN108139137A - Refrigerator

Info

Publication number: CN108139137A
Application number: CN201580083315.XA
Authority: CN
Inventors: 仲岛孔明; 田代雄亮
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2015-09-30
Filing date: 2015-09-30
Publication date: 2018-06-08
Also published as: AU2015410544A1; WO2017056212A1; SG11201800830SA; AU2015410544B2; JPWO2017056212A1

Abstract

Refrigerator carries out the 1st defrosting operating heated using heater to cooler under the 1st frosting state more than the frosting degree of cooler, the 2nd defrosting operating heated using heater to cooler is carried out under the 2nd few frosting state of the frosting degree of cooler, the 2nd capacity of the heating capacity of heater during as 2 defrosting operating is smaller than the 1st capacity of the heating capacity of the heater as the 1st defrosting operating.

Description

Refrigerator

Technical field

The present invention relates to refrigerator, more particularly to removal is attached to the technology of the frost of cooler.

Background technology

Refrigerator has storeroom, the wind path connected with the storeroom and the cooler for being set to the wind path etc..Moreover, ice Case cools down the air that wind path is flowed into from storeroom using cooler, and the air after cooling is made to return to storeroom, So as to be cooled down to storing indoor food etc..Here, in order to carry out being removed and placed into etc. and to storeroom of food etc. Door when being opened and closed, the air of the moistening of the outside of refrigerator is flowed into the storeroom.In addition, from the food for being stored in storeroom Product etc. also generate vapor.Therefore, as refrigerator remains in operation, the vapor that the returning air from storeroom is included becomes Frost and be attached to cooler.

Thus, in the past, it is also proposed that a kind of refrigerator, the refrigerator have the heater heated to cooler, utilize this Heater heats cooler, carries out the defrosting operating of cooler.For example, in patent document 1, work(is realized as one side The reduction of consumption carries out the refrigerator of defrosting operating on one side and proposes a kind of refrigerator, and in the refrigerator, the temperature of two systems is examined It surveys element and is installed on cooler, practical frosting state is judged according to its temperature difference, control from previous defrosting operating to originally Defrosting interval until secondary defrosting operating.

Existing technical literature

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2001-215077 bulletins

Invention content

Refrigerator recorded in patent document 1 is when carrying out defrosting operating, no matter the frosting degree of cooler, heater Heating capacity [W], in other words power consumption are all constant.Therefore, the following topics exist for the refrigerator recorded in patent document 1.

The air that cooler contacts first from the steam-laden returning air from storeroom of packet with the cooler flows into Mouth, the upstream side that in other words air in cooler flows start frosting.Later, the frosting range of cooler is from air inflow aperture It is extended towards air outlet.Then, last frosting is in cooler entirety.That is, in the few rank of the frosting degree of cooler Section is the frosting degree of air outlet side of cooler relative to the few state of the frosting degree of the air inflow aperture side of cooler. Therefore, no matter in frosting degree, how the heating capacity of heater is all in the refrigerator recorded in constant patent document 1, right When the cooler in frosting degree few stage is defrosted, the heating capacity of heater is excessive relative to the frosting degree of cooler, When terminating the defrosting of the air inflow aperture side of cooler, the temperature of the air outlet side of the cooler for the end that defrosted is excessive Ground rises.Therefore, the refrigerator recorded in patent document 1 exists when after the defrosting of cooler in frosting degree few stage is terminated Back to during usual operating, the air for being supplied to storeroom is stored indoor temperature by heating in the air outlet side of cooler Subject as degree rising.In addition, the refrigerator recorded in patent document 1 exists in order to the indoor sky of storage after temperature rise Gas is cooled down again, needs to consume electric power, subject as amount of power consumption increase.

In order to solve the above problems, it is considered that reduce the heating capacity of heater.However, reducing heater in this way Heating capacity in the case of, no matter how the heating capacity of heater is all for recorded in constant patent document 1 in frosting degree Refrigerator in, when to defrost to the cooler more than frosting degree, defrosting time is elongated.That is, in entire long-time Air after cooling can not be supplied to storeroom.Therefore, in the refrigerator recorded in patent document 1, even if there is reduction heating The heating capacity of device stores indoor temperature and also rises such subject.In addition, the refrigerator recorded in patent document 1 exists for The indoor air of storage after temperature rise cooled down again, needs to consume electric power, subject as amount of power consumption increase.

The present invention makes to solve problem as described above, and its purpose is to provide can be than more pressing down in the past System stores the refrigerator of indoor temperature rise due to defrosting operating.

The present invention provides a kind of refrigerator, has：Storeroom；Wind path is connected with the storeroom；Cooler is set to the wind Road cools down the air for flowing through the wind path；And heater, frosting in the cooler the 1st frosting state with And the cooler is heated under the frosting of the cooler 2nd frosting state fewer than the 1st frosting state, The 1st defrosting operating heated using the heater to the cooler is carried out under the 1st frosting state, described The 2nd defrosting operating heated using the heater to the cooler, the 1st defrosting fortune are carried out under 2 frosting states The heating capacity for turning the lower heater is the 1st capacity, and the heating capacity of the heater under the 2nd defrosting operating is 2nd capacity, the 2nd capacity are smaller than the 1st capacity.

In the refrigerator of the present invention, under the 1st frosting state more than the frosting degree of cooler, adding for heater can be increased Carry out defrosting operating to thermal capacity.Therefore, refrigerator of the invention can inhibit to defrost to the cooler more than frosting degree When defrosting time it is elongated, can inhibit to store indoor temperature rise.In addition, in the refrigerator of the present invention, in the knot of cooler Frost is measured under the 2nd few frosting state, and defrosting operating is carried out smallly when making the heating capacity of heater than the 1st frosting state.Therefore, The present invention refrigerator can inhibit will the cooler few to frosting degree defrost when, the temperature of the air outlet side of cooler Degree rises.That is, the present invention refrigerator will the cooler few to frosting degree defrost when, can also inhibit storeroom Interior temperature rise.

Description of the drawings

Fig. 1 is the side longitudinal section view of an example of the refrigerator for showing embodiments of the present invention 1.

Fig. 2 is the figure of an example of the circuit for the refrigerator for showing embodiments of the present invention 1.

Fig. 3 is the figure of an example of the circuit for the refrigerator for showing embodiments of the present invention 1.

Fig. 4 is the stereogram in the wind path for the refrigerator for showing embodiments of the present invention 1.

Fig. 5 is the temperature for showing the cooler when cooler of state few to frosting degree in the previous method defrosts Spend the figure of variation.

Fig. 6 is to show that the cooler of few to frosting degree state in the refrigerator of embodiments of the present invention 1 defrosts When cooler temperature change figure.

Fig. 7 is another of the defrosting operating for the state for showing that frosting degree in the refrigerator of embodiments of the present invention 1 is few The figure of example.

Fig. 8 is that the temperature of cooler when showing the pharoid energization in the refrigerator of embodiments of the present invention 1 becomes The figure of change.

Fig. 9 is an example of the frosting amount determination operation for showing the cooler in the refrigerator of embodiments of the present invention 1 Flow chart.

Figure 10 be show duration of runs from the end of defrosting operating in the refrigerator of embodiments of the present invention 1 with it is cold But the figure of the relationship of the frosting degree of device.

Figure 11 is the relationship for the frosting degree for showing door opening and closing number and cooler in the refrigerator of embodiments of the present invention 1 Figure.

Figure 12 is the side longitudinal section view of an example of the refrigerator for showing embodiments of the present invention 1.

Figure 13 is an example of the frosting amount determination operation for showing the cooler in the refrigerator of embodiments of the present invention 1 Flow chart.

Figure 14 is the P-Q characteristics (air volume-static pressure characteristic) of the fan for the refrigerator for showing embodiments of the present invention 1 Figure.

Figure 15 is the side longitudinal section view of an example of the refrigerator for showing embodiments of the present invention 1.

Figure 16 is an example of the frosting amount determination operation for showing the cooler in the refrigerator of embodiments of the present invention 1 Flow chart.

Figure 17 is an example of the frosting amount determination operation for showing the cooler in the refrigerator of embodiments of the present invention 1 Flow chart.

Figure 18 is the frosting degree for showing the indoor humidity of storage and cooler in the refrigerator of embodiments of the present invention 1 The figure of relationship.

Figure 19 is the side longitudinal section view of an example of the refrigerator for showing embodiments of the present invention 1.

Figure 20 is an example of the frosting amount determination operation for showing the cooler in the refrigerator of embodiments of the present invention 1 Flow chart.

Figure 21 is the side longitudinal section view of an example of the refrigerator for showing embodiments of the present invention 2.

Figure 22 is the stereogram in the wind path for the refrigerator for showing embodiments of the present invention 2.

Figure 23 is an example of the frosting amount determination operation for showing the cooler in the refrigerator of embodiments of the present invention 2 Flow chart.

Figure 24 is to show embodiment 1 and frosting amount determination operation and heater heating amount shown in embodiment 2 The figure of relationship.

Figure 25 is the figure for showing the frosting amount determination operation and an example of the relationship of heater heating amount of the present invention.

Figure 26 is the figure for showing the frosting amount determination operation and an example of the relationship of heater heating amount of the present invention.

(reference sign)

1：Framework；1a：Interior case；1b：Outer container；2：Machine chamber；3：Wind path；4：Blow out wind path；5：Blow out wind path；6：Blow out wind Road；7：Return to wind path；8：Return to wind path；9a：Air door；9b：Air door；10：Fan；11：Pharoid；12：Contact-type heats Device；21：Refrigerating chamber；22：Refrigerating chamber；23：Vegetable compartment；24：Door；25：Door；26：Door；31：Temperature sensor；32：Temperature sensing Device；33：Temperature sensor；34：Temperature sensor；35：Door opening and closing sensor；36：Input electric cur- rent measure sensor；37：Humidity Sensor；38：Temperature sensor；50：Freeze cycle circuit；51：Compressor；52：Radiator；53：Decompressor；54：Cooling Device；60：Control device；61：Control unit；62：Determination unit；63：Timing unit；64：Storage part；70：Circuit；71：Power supply；72：1st Wiring portion；73：2nd wiring portion；74：Resistive element；75：Switch；76：1st power supply；77：2nd power supply；100：Refrigerator.

Specific embodiment

Embodiment 1.

Fig. 1 is the side longitudinal section view of an example of the refrigerator for showing embodiments of the present invention 1.In addition, about Fig. 1 And aftermentioned side longitudinal section view, the front surface of refrigerator 100 is set as left side, it is illustrated that refrigerator 100.

The refrigerator 100 of present embodiment 1 has storeroom, the wind path 3 connected with the storeroom, is set to the wind path 3 Cooler 54 and the pharoid 11 that is heated in defrosting operating to cooler 54 etc..

Storeroom and wind path 3 are formed in framework 1.The framework 1 include interior case 1a, outer container 1b and be set to interior case 1a with Thermal insulation barriers between outer container 1b etc..Framework 1 is formed as the box shape of front-surface side opening, the inside of the interior case 1a in framework 1 For storeroom.In present embodiment 1, the inside of interior case 1a is formed with multiple storerooms by separator lined.Specifically, such as Shown in Fig. 1, the refrigerator 100 of present embodiment 1 has refrigerating chamber 21, refrigerating chamber 22 and vegetable compartment 23 as storeroom.

In addition, the type of storeroom and the quantity of storeroom are only an example.

Refrigerating chamber 21 is the storeroom for the refrigerated storage temperature section for being cooled to 0 DEG C~5 DEG C, is configured at the topmost of framework 1.It is cold Freeze room 22 be set to keep in cold storage object -15 DEG C~-20 DEG C of cryogenic temperature section storeroom, be configured at refrigerating chamber 21 Lower section.Vegetable compartment 23 is the storeroom for being set as being suitble to 0 DEG C~5 DEG C of the temperature section of storage vegetables, is configured at refrigerating chamber 22 Lower section.

These each storerooms are provided with the door that opening and closing covers the opening portion of each storeroom freely.Specifically, it is refrigerating The opening portion of room 21 is provided with the door 24 that opening and closing covers the opening portion freely.Opening and closing is provided in the opening portion of refrigerating chamber 22 certainly Such as cover the door 25 of the opening portion.The door 26 that opening and closing covers the opening portion freely is provided in the opening portion of vegetable compartment 23. In addition, it is additionally provided with the temperature sensor for the temperature for detecting each storeroom in these each storerooms.Specifically, in refrigerating chamber 21 Temperature sensor 31 is provided with, refrigerating chamber 22 is provided with temperature sensor 32, vegetable compartment 23 is provided with temperature sensor 33.

Wind path 3 is formed in the back side of storeroom.The wind path 3 is via blowout wind path and returns to wind path and each storeroom company It is logical.Specifically, wind path 3 is connect with refrigerating chamber 21 via blowout wind path 4 and return wind path (not shown).Wind path 3 and freezing Room 22 is connected via blowout wind path 5 and return wind path 7.Wind path 3 via blowout wind path 6 and returns to wind path 8 with vegetable compartment 23 Connection.

As described above, wind path 3 is provided with cooler 54.The cooler 54 is to flowing through the air, more specifically of wind path 3 It is cooled down from the air that storeroom is flowed into wind path 3 and is supplied to storeroom.In addition, in wind path 3, in the example of cooler 54 The air cooled down by cooler 54 is sent to the fan 10 of each storeroom as top is additionally provided with.In addition, in wind path 3, cold But such as lower section of device 54 is additionally provided with by the way that radiant heat is whole to cooler 54 carries out that radiation of heat is added to add in defrosting operating Hot device 11.

That is, it is configured to be flowed into refrigerating chamber 21 via blowout wind path 4 by the air that cooler 54 cools down, to storage It is cooled down in food in refrigerating chamber 21 etc..Moreover, the air for being configured to cool down the food etc. is via not shown Return wind path back to wind path 3, cooled down again by cooler 54.In addition, it is configured to the air cooled down by cooler 54 Refrigerating chamber 22 is flowed into via blowout wind path 5, food for being stored in refrigerating chamber 22 etc. is cooled down.Moreover, being configured to pair The air that the food etc. is cooled down is cooled down via wind path 7 is returned back to wind path 3 by cooler 54 again.In addition, It is configured to be flowed into vegetable compartment 23 via blowout wind path 6 by the air that cooler 54 cools down, to the food being stored in vegetable compartment 23 Product etc. are cooled down.Moreover, be configured to return to wind path 3 via wind path 8 is returned to the air that the food etc. is cooled down, then It is secondary to be cooled down by cooler 54.

In addition, in present embodiment 1, each storeroom is connected with the return wind path of wind path 3 under as cooler 54 It is connected at the position of side with wind path 3.That is, in present embodiment 1, the lower end of cooler 54 is air inflow aperture, cold But the upper end of device 54 is air outlet.

In addition, in present embodiment 1, the blowout wind path 4 of communication air duct 3 and refrigerating chamber 21 is provided with air door 9a.Separately Outside, the blowout wind path 6 of communication air duct 3 and vegetable compartment 23 is provided with air door 9b.That is, it is configured to by air door 9a is opened and closed and adjusts cooling air to the supply amount of refrigerating chamber 21.In addition, it is configured to by opening air door 9b It closes and adjusts cooling air to the supply amount of vegetable compartment 23.

Above-mentioned cooler 54 forms freeze cycle circuit 50.The freeze cycle circuit 50 be by compressor 51, radiator 52, Decompressor 53 and cooler 54 carry out piping connection and form.

Compressor 51 sucks the refrigerant of the low-temp low-pressure flowed out from cooler 54, is compressed into the gas refrigeration of high temperature and pressure Agent.The compressor 51 is set to the machine chamber 2 for the lower back side for being formed in framework 1.Radiator 52 is compressed from compressor 51 High temperature and pressure gas refrigerant heat dissipation, which is condensed into the liquid refrigerant of high pressure.52, the radiator Such as it is the heat exchanger of fin-and-tube type, and is arranged at machine chamber 2.

Decompressor 53 is capillary or electromagnetic expanding valve etc., makes the liquid refrigerant of the high pressure flowed out from radiator 52 It is expanded into the gas-liquid two-phase refrigerant of low-temp low-pressure.The decompressor 53 is set to machine chamber 2.Cooler 54 is, for example, finned tube The heat exchanger of type makes the gas-liquid two-phase refrigerant of the low-temp low-pressure flowed out from decompressor 53 and the sky flowed out from each storeroom Gas carries out heat exchange, which is cooled down.

In addition, control device 60 of the refrigerator 100 of present embodiment 1 such as having including microcomputer.The control device 60 Such as the top rear face side of framework 1 is set to, have control unit 61, determination unit 62, timing unit 63 and storage part 64 etc..This Outside, in Fig. 1, for convenience, extract control device 60 out and show.

Control unit 61 control compressor 51 startup and stopping, the rotating speed of compressor 51, fan 10 startup and stop Only, the rotating speed of fan 10, the aperture of air door 9a, 9b, the aperture of decompressor 53, whether be powered, radiate to pharoid 11 Heating capacity [W] power consumption during energization of heater 11 etc..Determination unit 62 judges the frosting degree of cooler 54.In this embodiment party In formula 1, the judgement of determination unit 62 is few the of the frosting degree of the 1st frosting state or cooler 54 more than the frosting degree of cooler 54 2 frosting states.Timing unit 63 measures the times such as the duration of runs of refrigerator 100.Storage part 64 is stored in the control control of control unit 61 The value, formula, the table that use etc. such as when object and the judgement frosting degree of determination unit 62.

Here, the refrigerator 100 of present embodiment 1 make situation more than the frosting degree of cooler 54 with it is few in the case of radiation The heating capacity of heater 11 is different.Therefore, refrigerator 100 for example has following circuit.

In circuit 70 shown in Fig. 2, between pharoid 11 and power supply 71, there is the 1st wiring of resistive element 74 Portion 72 is connected in parallel with the 2nd wiring portion 73 without resistive element.In addition, circuit 70 shown in Fig. 2 has switch 75, the switch 75 be switched to be connected with power supply 71, the 1st wiring portion 72 and pharoid 11 loop circuit or be connected with power supply the 71, the 2nd The loop circuit of wiring portion 73 and pharoid 11.Power supply 71, the 2nd wiring portion 73 are connected with to become by switching switch 75 And the loop circuit of pharoid 11, it is capable of the heating capacity of Enhanced Radiation Reduced Blast heater 11.In addition, by switching switch 75 and As being connected with power supply 71, there is the 1st wiring portion 72 of resistive element 74 and the loop circuit of pharoid 11, in radiant heating The electric current flowed through in device 11 declines, and can reduce the heating capacity of pharoid 11.

In addition, control unit 61 carries out the switching of switch 75.In addition, the 2nd wiring portion 73 is configured to the electricity lower than the 1st wiring portion Resistance.Accordingly it is also possible in the low resistive element of the 2nd wiring portion setting resistance ratio resistive element 74.

Fig. 3 is the figure of an example of the circuit for the refrigerator for showing embodiments of the present invention 1.Even if circuit is formed in this way 70, can also make situation more than the frosting degree of cooler 54 from it is few in the case of pharoid 11 heating capacity it is different.

That is, circuit 70 shown in Fig. 3 has switch 75, which, which is switched to, is connected with the 1st power supply 76 and radiant heating The loop circuit of device 11 or the loop circuit for being connected with the 2nd power supply 77 and pharoid 11.If the service voltage of the 1st power supply 76 It is different from the service voltage of the 2nd power supply 77, then switching switch 75, so as to make the heating capacity of pharoid 11 different. In addition, the structure for refrigerator 100 is not necessarily required in the 1st power supply 76 and the 2nd power supply 77.When the setting place in refrigerator 100 has confession In the case of to two different power supplys of voltage, these power supplys are used as the 1st power supply 76 and the 2nd power supply 77.In addition, example Such as, can also have two transformers in circuit 70, these transformers are connected to source power supply etc., these transformers are used Make the 1st power supply 76 and the 2nd power supply 77.In addition, for example, it is also possible to using a side of the 1st power supply 76 and the 2nd power supply 77 as quotient With power supply, using the opposing party of the 1st power supply 76 and the 2nd power supply 77 as transformer.

[action specification]

Refrigerator 100 proceeds as follows action formed as described above.

(usually operating)

The usual operating cooled down to storing indoor food etc. proceeds as follows.

Control unit 61 is stored in storage part 64 so that the detected value for being set to the temperature sensor 32 of refrigerating chamber 22 becomes The mode of set temperature controls compressor 51.That is, control unit 61 compares set temperature in the detected value of temperature sensor 32 In the case of height, start compressor 51.In addition, control unit 61 is in the detected value of temperature sensor 32 feelings lower than set temperature Under condition, stop compressor 51.It can also be in the operation process of compressor 51, according to the detected value of temperature sensor 32 with setting Temperature difference is determined to change the rotating speed of compressor 51.

In addition, control unit 61 controls the aperture of air door 9a, so as to be set to the detection of the temperature sensor 31 of refrigerating chamber 21 It is worth the set temperature to be stored in storage part 64.That is, control unit 61 is warmer than setting in the detected value of temperature sensor 31 In the case that degree is high, air door 9a is opened, cooling air is supplied to refrigerating chamber 21.In addition, control unit 61 is in temperature sensor 31 In the case that detected value is lower than set temperature, air door 9a is closed.Can also to the cooling air of refrigerating chamber 21 supply during, The aperture of air door 9a is changed according to the difference of the detected value of temperature sensor 31 and set temperature.

Similarly, control unit 61 controls the aperture of air door 9b, so as to be set to the inspection of the temperature sensor 33 of vegetable compartment 23 Measured value is the set temperature for being stored in storage part 64.That is, detected value ratio setting of the control unit 61 in temperature sensor 33 In the case of temperature height, air door 9b is opened, cooling air is supplied to vegetable compartment 23.In addition, control unit 61 is in temperature sensor 33 Detected value it is lower than set temperature in the case of, close air door 9b.Process can also be being supplied to the cooling air of vegetable compartment 23 In, the aperture of air door 9b is changed according to the difference of the detected value of temperature sensor 33 and set temperature.

(defrosting operating)

In usual operation process, when being opened and closed the door of storeroom for being removed and placed into when for food etc., refrigerator The air of external moistening is flowed into the storeroom.In addition, also generate vapor from food for being stored in storeroom etc..Cause This, includes the vapor from generations such as food in the air from storeroom back to wind path 3.Thus, with continuation usually fortune Turn, the vapor that the returning air from storeroom is included becomes frost and is attached to cooler 54.Moreover, with cooler 54 Frosting degree increase, the cooling performance of cooler 54 declines.Therefore, it is necessary to regularly remove to be attached to the frost of cooler 54.

In addition, in present embodiment 1, for example, being more than the regulation for being stored in storage part 64 in the duration of runs of refrigerator 100 In the case of time, control unit 61 carries out defrosting, that is, defrosting operating of cooler 54.The stipulated time is, for example, 1 day.In addition, meter When portion 63 measure refrigerator 100 operating.

In addition, for example, even if compressor 51 is made persistently to drive more than certain time, can not be also cooled in refrigerating chamber 22 In the case of set temperature, control unit 61 carries out defrosting operating.In addition, by comparing the compressor 51 measured by timing unit 63 The duration of runs and be stored in the stipulated time of storage part 64 judge compressor 51 whether persistently driving it is more than certain time.Example As control unit 61 or determination unit 62 carry out the judgement.

In addition, the refrigerator 100 of present embodiment 1 has the temperature sensor 34 of the temperature of detection cooler 54.When the temperature The detected value of degree sensor 34 is more than when being stored in the set point of temperature of storage part 64, to terminate defrosting operating.Set point of temperature is, for example, 5 ℃.That is, control unit 61 stops the energization to pharoid 11.As described later, cooler 54 is flowed into from as air The lower end side of mouth starts frosting.Then, when having carried out defrosting operating, it is attached to the last thawing of frost of the lower end side of cooler 54 It finishes.Therefore, the temperature sensor 34 for the end judgement of defrosting operating is preferably disposed on the lower end of cooler 54.

In addition, temperature sensor 34 is equivalent to the 1st temperature sensor of the present invention.

Here, about previous refrigerator, when carrying out defrosting operating, no matter the frosting degree of cooler, heater Heating capacity [W] is all constant.Therefore, the following topics exist for previous refrigerator.

Fig. 4 is the stereogram in the wind path for the refrigerator for showing embodiments of the present invention 1.In addition, white shown in Fig. 4 is empty Heart arrow represents the flow direction of the air in wind path 3.

As described above, the returning air from each storeroom is flowed into from the lower end of the cooler 54 as air inflow aperture Cooler 54 is flowed out from the upper end of the cooler 54 as air outlet.At this point, in non-frosting in the state of cooler 54 Under, the returning air from each storeroom easily from the ventilation resistance in the lower end of cooler 54 it is few center nearby, in other words The position of side wall far from wind path 3 is flowed into cooler 54.Therefore, cooler 54 is first from the lower end shown in the range A in Fig. 4 Center nearby start frosting.In addition, as the frosting in range A is in progress, the ventilation resistance of range A also becomes larger.Therefore, it cools down Device 54 is in progress with the frosting in range A, and the range B in lower end also begins to frosting.Then, after the frosting of range A, B, frosting It is in progress to the upper end side of cooler 54, in range C also frosting, in the whole frosting of cooler 54.

It is the frosting degree of the air outlet side of cooler 54 that is, in the frosting degree of cooler 54 few stage Relative to the few state of the frosting degree of the air inflow aperture side of cooler 54.Therefore, no matter in the frosting as previous refrigerator In the case that how amount all makes the heating capacity of pharoid 11 become constant, the temperature of the cooler 54 during defrosting operating into It is such for Fig. 5 as shown below.

Fig. 5 is the temperature for showing the cooler when cooler of state few to frosting degree in the previous method defrosts Spend the figure of variation.In addition, thick solid line shown in fig. 5 represents that the upper end of cooler 54 is nearby the temperature near air outlet Degree.In addition, thick dotted line shown in fig. 5 represents the temperature near lower end, that is, air inflow aperture of cooler 54.

When defrosting operating starts and cooler 54 is heated by pharoid 11, the whole temperature of cooler 54 Rise (state D).Then, when as 0 DEG C identical with frost, before frost thawing finishes, the whole temperature quilt of cooler 54 It remains 0 DEG C (state E).It is the cooling as air outlet side as described above, in the frosting degree of cooler 54 few stage The frosting degree of the upper end side of device 54 is relative to the few state of the frosting degree of the lower end side of the cooler 54 as air inflow aperture side. Therefore, before the frost of the lower end of cooler 54 melts and finishes, the frost near the upper end of cooler 54, which melts, to be finished, and is cooled down Temperature rise (state F1) near the upper end of device 54.At this point, the frost of the frosting degree lower end more than near upper end not yet melts Change finishes, and it is 0 DEG C to remain on.Later, when the frost of the lower end of cooler 54, which also melts, to be finished, the lower end of cooler 54 Neighbouring temperature also begins to rise (state G1).Then, when the detected value for the temperature sensor 34 for being set to cooler 54 is more than When set point of temperature is such as 5 DEG C, terminate defrosting operating.That is, control unit 61 stops the energization to pharoid 11.

In the defrosting operating of cooler 54 for carrying out the few state of frosting degree in this way, no matter when frosting degree as in the past When the heating capacity of pharoid 11 how all to be made to become constant, set on the basis of the defrosting operating when more by frosting degree In the case of heating capacity, heating capacity is excessive.Therefore, under state F1, temperature near the upper end of cooler 54 it is upper Lifting speed becomes larger.That is, before the temperature rise of the lower end of cooler 54, the upper end of cooler 54 is nearby by mistake Degree heating.Therefore, in Figure 5, as shown in Ta, at the end of defrosting operating, the temperature near the upper end of cooler 54 is exceedingly Rise.Therefore, back to during usual operating, the air for being supplied to storeroom is heated in the upper end side of cooler 54, storage Indoor temperature rise.In addition, in order to be cooled down again to the indoor air of storage after temperature rise, consumption electricity is needed Power, amount of power consumption increase.

In order to solve the above problems, it is considered that reduce the heating capacity of pharoid 11.However, reducing in this way In the case of the heating capacity of pharoid 11, no matter how the heating capacity of pharoid 11 is all constant in frosting degree Previous method in, when to defrost to the cooler 54 more than frosting degree, defrosting time is elongated.That is, whole A long-time can not supply air after cooling to storeroom.Therefore, in the situation that defrosting operating is carried out according to previous method Under, even if reducing the heating capacity of pharoid 11, store indoor temperature and also rise.In addition, in order to after to temperature rise The indoor air of storage cooled down again, need consume electric power, amount of power consumption increase.

Thus, the refrigerator 100 of present embodiment 1 makes the 1st defrosting under the 1st frosting state more than the frosting degree of cooler 54 The heating capacity of the pharoid 11 of the 2nd defrosting operating under operating the 2nd frosting state few with the frosting degree of cooler 54 It is different.More specifically, the heating of the pharoid 11 when the refrigerator 100 of present embodiment 1 makes to operate as the 2nd frosting is held 1st capacity of the heating capacity of the pharoid 11 when the 2nd capacity of amount as the 1st frosting than operating is small.For example, using as 2nd capacity of the heating capacity of the pharoid 11 when the 2nd frosting operates is set as the 50% of rated capacity, will be used as the 1st knot 1st capacity of the heating capacity of the pharoid 11 during frost operating is set as the 100% of rated capacity.

Fig. 6 is to show that the cooler of few to frosting degree state in the refrigerator of embodiments of the present invention 1 defrosts When cooler temperature change figure.In addition, thick solid line shown in fig. 6 represents that the upper end of cooler 54 is nearby air row The temperature of near exit.In addition, thick dotted line shown in fig. 6 is represented near lower end, that is, air inflow aperture of cooler 54 Temperature.

In the refrigerator 100 of present embodiment 1, the temperature change of the cooler 54 during defrosting operating also substantially in the past It is identical.That is, when defrosting operating starts and cooler 54 is heated by pharoid 11, the whole temperature of cooler 54 Rise (state D).Then, when as 0 DEG C identical with frost, before frost thawing finishes, the whole temperature quilt of cooler 54 It remains 0 DEG C (state E).It is to become air to discharge as described above, under the 2nd few frosting state of the frosting degree of cooler 54 The frosting degree of the upper end side of the cooler 54 of mouthful side relative to the lower end side of the cooler 54 as air inflow aperture side frosting Measure few state.Therefore, before the frost of the lower end of cooler 54 melts and finishes, the frost near the upper end of cooler 54 melts Change finishes, the temperature rise (state F2) near the upper end of cooler 54.

At this point, 2nd defrosting of the refrigerator 100 of present embodiment 1 under the 2nd few frosting state of the frosting degree of cooler 54 Under operating, reduce the heating capacity of pharoid 11.Therefore, in the temperature of the frosting degree lower end more than near upper end It rises in the state of not starting, the temperature rise near the upper end of cooler 54 is slowed by.Therefore, the refrigerator 100 of present embodiment 1 It can inhibit the temperature rise near the upper end of cooler 54 as shown in the Tb in Fig. 6, at the end of defrosting operating.Namely Say, the refrigerator 100 of present embodiment 1 back to the air that can inhibit to be supplied to storeroom during usual operating in cooler 54 Upper end side heated, can inhibit to store indoor temperature rise.In addition it is possible to it reduces for the storage after temperature rise Hide the amount of power consumption that indoor air is cooled down again.

In addition, 1st defrosting of the refrigerator 100 of present embodiment 1 under the 1st frosting state more than the frosting degree of cooler 54 Under operating, the heating capacity of Enhanced Radiation Reduced Blast heater 11.Therefore, the refrigerator 100 of present embodiment 1 can prevent the 1st defrosting fortune The time turned is elongated.Thus, the refrigerator 100 of present embodiment 1 after 1 defrosting operating when returning to situation about usually operating Under, can also inhibit to store indoor temperature rise, can reduce for the indoor air of storage after temperature rise again The amount of power consumption cooled down.

In addition it is also possible under the 2nd defrosting operating under the 2nd few frosting state of the frosting degree of cooler 54, with as follows Mode controls the heating capacity of pharoid 11.

For example, it is also possible under the 2nd defrosting operating under the 2nd few frosting state of the frosting degree of cooler 54, as Frost near the upper end of the cooler 54 of air outlet side melts finish before, make the heating capacity of pharoid 11 than the 2 capacity are big.For example, it is also possible to the heating capacity of pharoid 11 is set as the 100% of rated capacity.Furthermore, it is also possible to it Reduce the heating capacity of pharoid 11 afterwards and be set as the 2nd capacity.For example, it is also possible to the heating capacity by pharoid 11 It is set as the 50% of rated capacity.In this way control pharoid 11 heating capacity, can shorten the 2nd defrosting operating when Between, it can inhibit to store indoor temperature rise during the 2nd defrosting operating.

In the case of the heating capacity of control pharoid 11 in this way, passed in the temperature of the temperature of detection cooler 54 In a state that the detected value of sensor 34 is smaller than the specified value for being stored in storage part 64, the heating capacity of Enhanced Radiation Reduced Blast heater 11, It is the heating capacity of reduction pharoid 11 after more than specified value in the detected value of temperature sensor 34.It here, should Specified value is low and higher than the 0 DEG C temperature of the set point of temperature of judgement terminated than being used for defrosting operating, for example, 1 DEG C.In addition, example As control unit 61 carries out the comparison of the detected value and specified value of temperature sensor 34.

(frosting degree judgement)

The judgement of the frosting state of cooler 54 as described above for example proceeds as follows.

Fig. 8 is that the temperature of cooler when showing the pharoid energization in the refrigerator of embodiments of the present invention 1 becomes The figure of change.In addition, Fig. 9 is one of the frosting amount determination operation for showing the cooler in the refrigerator of embodiments of the present invention 1 The flow chart of example.

The thermal capacity of cooler 54 is determined according to the raw material used in cooler 54 and the size of the raw material etc.. In addition, in the case where frost is attached to cooler 54, the thermal capacity of cooler 54 becomes the value of the thermal capacity also plus frost.And And it can will be cooled down with pharoid 11 according to the thermal capacity of cooler 54 and the heating capacity of pharoid 11 to predict The temperature rise of cooler 54 during the heating stipulated time t1 of device 54.That is, as shown in figure 8, with pharoid In the case that cooler 54 is heated stipulated time t1 by 11, frosting degree is more, and the temperature rise of cooler 54 is smaller.Therefore, The frosting degree of cooler 54 can be judged using the temperature rise.

In this case, determination unit 62 for example judges the frosting degree of cooler 54 using flow shown in Fig. 9.

When usual operating is switched to defrosting operating i.e. defrosting operating when, the judgement of the beginning frosting degree of determination unit 62 (step S11).Then, in step s 12, before being powered to pharoid 11, determination unit 62 obtains temperature sensor 34 Detected value T1, that is, cooler 54 temperature T1.After step s 12, in step s 13, control unit 61 is to pharoid 11 It is powered, begins to cool down the heating of device 54.In addition, the heating capacity of pharoid 11 at this time is arbitrary.

After step s 13, in step S14, timing unit 63 measures the heating time of pharoid 11.Then, when When the time of measuring of timing unit 63 reaches the stipulated time t1 for being stored in storage part 64, in step S15, determination unit 62 obtains temperature Spend sensor 34 detected value T2, that is, cooler 54 temperature T2, calculate from T2 subtract T1 obtained from subtraction value i.e. temperature difference Δ T.Later, in step s 16, whether 62 comparison temperature difference Δ T of determination unit is bigger than being stored in the 1st decision content of storage part 64.So Afterwards, in the case where temperature difference Δ T is bigger than the 1st decision content, the frosting state of cooler 54 is determined as it being frosting by determination unit 62 Measure the 2nd few frosting state (step S17).In addition, in the case where temperature difference Δ T is below the 1st decision content, determination unit 62 will The frosting state of cooler 54 is determined as it being the 1st frosting state (step S18) more than frosting degree.

In addition, for example, the judgement of the frosting state of cooler 54 can also proceed as follows.

Figure 10 be show duration of runs from the end of defrosting operating in the refrigerator of embodiments of the present invention 1 with it is cold But the figure of the relationship of the frosting degree of device.Figure 11 is to show the door opening and closing number in the refrigerator of embodiments of the present invention 1 and cooling The figure of the relationship of the frosting degree of device.Figure 12 is the lateral longitudinal section view of an example of the refrigerator for showing embodiments of the present invention 1 Figure.In addition, Figure 13 is an example of the frosting amount determination operation for showing the cooler in the refrigerator of embodiments of the present invention 1 Flow chart.

When starting again at usual operating after terminating defrosting operating, as shown in Figure 10, as time goes by, cooler 54 frosting degree is for example increased in a manner of linear function.In addition, when the door of storeroom is opened and closed, the moistening outside refrigerator 100 Air be flowed into storeroom.Therefore, as shown in figure 11, when being opened and closed door, increase to the frosting degree ladder of cooler 54 Greatly.That is, the frosting degree of the opening and closing number of door and cooler 54 is in proportionate relationship.Thus, it is possible to it is removed according to from previous In other words the number that frost operates the time until this defrosting operating and door is opened and closed during the time is sentenced to speculate Determine the frosting degree of cooler 54.

In this case, as shown in figure 12, the door of the opening and closing of the door 24 of detection refrigerating chamber 21 is set to be opened and closed in refrigerator 100 to pass Sensor 35, detect refrigerating chamber 22 door 25 opening and closing door opening and closing sensor 35 and detect vegetable compartment 23 door 25 opening and closing Door opening and closing sensor 35.Moreover, determination unit 62 for example judges the frosting degree of cooler 54 using the flow shown in Figure 13 .

Namely it is decided that portion 62 starts the judgement (step S21) of frosting degree at the end of defrosting operating.Then, in step S22 In, determination unit 62 is opened and closed the detected value of sensor 35 to judge whether the arbitrary door of storeroom is opened and closed according to door.Then, exist In the case that the arbitrary door of storeroom is by opening and closing, in step s 24, determination unit 62 is opened and closed number to the door for being stored in storage part 64 In addition " 1 ".In addition, door is opened and closed number becomes " 0 " at the time point for starting defrosting operating.

In step S23, timing unit 63 measures the elapsed time from terminating defrosting operating.In addition, in step S23, Determination unit 62 obtains the elapsed time that timing unit 63 is measured.Then, in step s 25, determination unit 62 determines whether to start to remove Frost operating.That is, determination unit 62 judges whether the elapsed time that timing unit 63 is measured is more than to be stored in storage part 64 Stipulated time.In addition, in the case where not starting defrosting operating, step S22 is repeated to step S25.

When starting defrosting operating, in step S26, determination unit 62 is according to from previous defrosting operating to this defrosting Time until operating and door is opened and closed during the time number speculate the frosting degree of cooler 54.In addition, depositing The elapsed time shown in Fig. 10 from the end of defrosting operating and cooling are stored in storage portion 64 as table or formula The relationship of the frosting degree of device 54.In addition, in storage part 64, the door opening and closing shown in Figure 11 is stored with as table or formula The relationship of number and the frosting degree of cooler 54.Determination unit 62 speculates the frosting degree of cooler 54 using the table or formula x。

After step S26, in step s 27, whether determination unit 62 judges the frosting degree x deduced than being stored in storage 2nd decision content in portion 64 is big.Then, in the case where frosting degree x is bigger than the 2nd decision content, determination unit 62 is by the knot of cooler 54 White state is determined as it being the 1st frosting state (step S28) more than frosting degree.In addition, in frosting degree x for below the 2nd decision content In the case of, the frosting state of cooler 54 is determined as it being the 2nd few frosting state (step S29) of frosting degree by determination unit 62.

Here, door opening and closing sensor 35 is not necessarily required to be arranged in correspondence with all doors, as long as at least one door accordingly Setting.In the case where being arranged in correspondence with an opening and closing sensor 35 with the door of a part, with accordingly being set with all doors It puts a situation for opening and closing sensor 35 to compare, the supposition accuracy decline of the frosting degree of cooler 54, but door opening and closing can be cut down and passed Sensor 35, so refrigerator 100 can be manufactured inexpensively.In addition, it is arranged in correspondence with an opening and closing sensor 35 in the door with a part In the case of, the door for being preferably provided the opening and closing of the door 24 of detection refrigerating chamber 21 is opened and closed sensor 35.The reason for this is that refrigerating chamber 21 Door 24 is the door for being easiest to be opened and closed, and the air of the moistening outside refrigerator 100 is easiest to be flowed into refrigerating chamber 21 as a result,.Namely It says, the reason for this is that the air for the moistening being flowed into outside the refrigerator 100 of refrigerating chamber 21 is easiest to frosting in cooler 54.

Figure 14 is the P-Q characteristics (air volume-static pressure characteristic) of the fan for the refrigerator for showing embodiments of the present invention 1 Figure.Figure 15 is the side longitudinal section view of an example of the refrigerator for showing embodiments of the present invention 1.In addition, Figure 16 is to show The flow chart of one example of the frosting amount determination operation of the cooler in the refrigerator of embodiments of the present invention 1.

When starting again at usual operating after terminating defrosting operating, as time goes by, the frosting degree of cooler 54 Increase.Then, as the frosting degree of cooler 54 increases, the wind path area of section in cooler 54 is reduced, so such as Figure 14 institutes Show, H2 is also increased to from H1 by the ventilation resistance of air that fan 10 attracts and passes through cooler 54.In addition, it is input to fan 10 Current value also increase.It is input to the current value of fan 10 therefore, it is possible to use and judges the frosting degree of cooler 54.

In this case, as shown in figure 15, the input current of the current value of fan 10 is input in the setting detection of refrigerator 100 Detection sensor 36.Moreover, determination unit 62 for example judges the frosting degree of cooler 54 i.e. using the flow shown in Figure 16 It can.

Namely it is decided that portion 62 starts the judgement (step S31) of frosting degree when being switched to defrosting operating from usual operating.So Afterwards, in step s 32, the detected value y that determination unit 62 obtains input electric cur- rent measure sensor 36 is the electric current for being input to fan 10 Value y.Later, in step S33, whether determination unit 62 compares current value y bigger than being stored in the 3rd decision content of storage part 64.So Afterwards, in the case where current value y is bigger than the 3rd decision content, the frosting state of cooler 54 is determined as it being frosting degree by determination unit 62 The 1st more frosting states (step S34).In addition, in the case where current value y is below the 3rd decision content, determination unit 62 will cool down The frosting state of device 54 is determined as it being the 2nd few frosting state (step S35) of frosting degree.

In addition, the current value for being input to fan 10 also changes according to the rotating speed of fan 10.In addition, the rotating speed of fan 10 is also deposited Variable control situation is being carried out according to the temperature of cooler 54.Accordingly it is also possible to make above-mentioned 3rd decision content according to fan 10 At least one party in the temperature of rotating speed and cooler 54 and change.That is, can also make the rotating speed of fan 10 and The formula that above-mentioned 3rd decision content is obtained as variable by least one party in the temperature of cooler 54 is stored in storage part 64.

In addition, in increasing and the power consumption of fan 10 also increased correspondence with the current value for being input to fan 10. Accordingly it is also possible to which the sensor for the power consumption for detecting fan 10 is set to refrigerator 100, compare the detected value and the 3rd of the sensor Decision content judges the frosting state of cooler 54.

In addition, the judgement of the frosting state of such as cooler 54 can also proceed as follows.

When starting again at usual operating after terminating defrosting operating, as time goes by, the frosting degree of cooler 54 Increase.Then, as described above, the frosting degree with cooler 54 increases, 54 ventilation resistance of cooler also increases.In addition, with The frosting degree increase of cooler 54, fin efficiency during the frosting on 54 surface of cooler because to deteriorating, the heat exchange of cooler 54 Can also it decline.Moreover, in freeze cycle circuit 50, when the heat exchange performance of cooler 54 deteriorates, the temperature of cooler 54 The evaporating temperature of the refrigerant flowed through in cooler 54 declines.Therefore, it is possible to which the temperature of cooler 54 i.e. temperature is used to pass The detected value of sensor 34 judges the frosting degree of cooler 54.

In this case, determination unit 62 for example judges the frosting degree of cooler 54 using the flow shown in Figure 17.

Namely it is decided that portion 62 starts the judgement (step S41) of frosting degree when being switched to defrosting operating from usual operating.So Afterwards, in step S42, determination unit 62 obtains the temperature T3 of detected value T3, that is, cooler 54 of temperature sensor 34.Later, in step In rapid S43, whether determination unit 62 compares detected value T3 bigger than being stored in the 4th decision content of storage part 64.Then, in detected value T3 In the case of bigger than the 4th decision content, the frosting state of cooler 54 is determined as it being the 2nd few frosting shape of frosting degree by determination unit 62 State (step S44).In addition, in the case where detected value T3 is below the 4th decision content, determination unit 62 is by the frosting shape of cooler 54 State is determined as it being the 1st frosting state (step S45) more than frosting degree.

In addition, when in frosting before cooler 54 in the state of change compressor 51 rotating speed when, the temperature of cooler 54 The evaporating temperature of refrigerant that degree flows through in cooler 54 changes.In addition, also there is the setting according to refrigerating chamber 22 Temperature changes the situation of the evaporating temperature of the refrigerant flowed through in cooler 54.Accordingly it is also possible to make above-mentioned 4th decision content Changed according at least one party in the set temperature of the rotating speed of compressor 51 and refrigerating chamber 22.That is, it can also make Above-mentioned 4th decision content is obtained as variable by least one party in the set temperature of the rotating speed of compressor 51 and refrigerating chamber 22 Formula be stored in storage part 64.

Figure 18 is the frosting degree for showing the indoor humidity of storage and cooler in the refrigerator of embodiments of the present invention 1 The figure of relationship.Figure 19 is the side longitudinal section view of an example of the refrigerator for showing embodiments of the present invention 1.In addition, Figure 20 It is the flow chart of an example of the frosting amount determination operation for showing the cooler in the refrigerator of embodiments of the present invention 1.

Each storeroom of refrigerator 100 when the opening and closing of door other than be closed state.Therefore, the operating of refrigerator 100 The indoor humidity variation of storage in journey is proportional to the frosting degree of cooler 54.Specifically, it is higher to store indoor humidity In the state of cooler 54 frosting degree it is bigger.For example, the J1 lines shown in Figure 18 represent to store the low state of indoor humidity.Separately Outside, the J2 lines shown in Figure 18 represent to store the high state of indoor humidity.Moreover, when comparing J1 lines time integral and obtaining Value and when J2 lines are worth obtained from the time integral, the integrated value of J2 lines is bigger than the integrated value of J1 line.Therefore, it is possible to make Judge the frosting degree of cooler 54 with the aggregate-value for storing indoor humidity.

In this case, as shown in figure 19, the humidity sensor 37 for the humidity for detecting refrigerating chamber 21 is preferably set to this Refrigerating chamber 21.Moreover, determination unit 62 for example judges the frosting degree of cooler 54 using the flow shown in Figure 20.

Namely it is decided that portion 62 starts the judgement (step S51) of frosting degree at the end of defrosting operating.Then, in step S52 In, determination unit 62 obtains the detected value of humidity sensor 37, calculates the aggregate-value K of the detected value.After step S52, in step In rapid S53, timing unit 63 measures the elapsed time from terminating defrosting operating.In addition, in step S53, determination unit 62 obtains The elapsed time that timing unit 63 is measured.Then, in step S54, determination unit 62 determines whether to start defrosting operating.Namely It says, determination unit 62 judges whether the elapsed time that timing unit 63 is measured is more than the stipulated time for being stored in storage part 64.In addition, In the case where not starting defrosting operating, step S52 is repeated to step S54.Namely it is decided that portion 62 persistently carries out humidity sensor 37 Detected value accumulative, update aggregate-value K.In addition, aggregate-value K is for example stored in storage part 64.

When starting defrosting operating, in step S55, determination unit 62 compares the defrosting from previous defrosting operating to this The aggregate-value K of the detected value of humidity sensor 37 until operating and the 5th decision content for being stored in storage part 64.Then, tired In the case that evaluation K is bigger than the 5th decision content, the frosting state of cooler 54 is determined as it being the 1st more than frosting degree by determination unit 62 Frosting state (step S56).In addition, in the case where aggregate-value K is below the 5th decision content, determination unit 62 is by cooler 54 Frosting state is determined as it being the 2nd few frosting state (step S57) of frosting degree.

Here, the installation position of the humidity sensor 37 shown in Figure 19 is only an example.As long as the temperature of air is 0 DEG C or more, detection humidity is made it easy to, so for example can also humidity sensor 37 be set to vegetable compartment 23.In addition, for example, Humidity sensor 37 can be set to all storerooms.The supposition precision of the frosting degree of cooler 54 improves.

Embodiment 2.

In the embodiment 1, it has used in the defrosting of cooler 54 and has been carried out by radiant heat to cooler 54 is whole The pharoid 11 of heating.However, the heater for the defrosting of cooler 54 is not limited to pharoid 11.Example Such as, with pharoid 11 together or pharoid 11 can also be replaced and will be connect with what cooler 54 was placed in contact with It touches type heater and is set to refrigerator 100.In this case, as long as also judging cooler 54 using above-mentioned frosting amount determination operation Frosting degree.Moreover, under the 1st defrosting operating under the 1st frosting state more than the frosting degree of cooler 54, make contact-type The heating capacity of heater i.e. the 1st capacity is such as big like that as the 100% of rated capacity.In addition, in cooler 54 Under the 2nd defrosting operating under the 2nd few frosting state of frosting degree, make heating capacity i.e. the 2nd capacity of contact-type heater for example It is small as 50% grade of rated capacity.It as a result, as described in Embodiment 1, can be in the 1st frosting state And the 2nd frosting state this both sides, inhibit to store indoor temperature rise, additionally it is possible to reduce for the storage after temperature rise The amount of power consumption that indoor air is cooled down again.

In addition, in the case where contact-type heater is set to refrigerator 100, additionally it is possible to judgement cooling as follows The frosting degree of device 54.It is pair similary with embodiment 1 in addition, identical with embodiment 1 in the structure that present embodiment 2 is not recorded Structure add the reference numeral identical with embodiment 1.

Figure 21 is the side longitudinal section view of an example of the refrigerator for showing embodiments of the present invention 2.Figure 22 is to show Stereogram in the wind path of the refrigerator of embodiments of the present invention 2.In addition, Figure 23 shows the refrigerator of embodiments of the present invention 2 In cooler frosting amount determination operation an example flow chart.

As shown in Figure 21 and Figure 22, the refrigerator 100 of present embodiment 2 does not have pharoid 11, and have with it is cold But the contact-type heater 12 that device 54 is placed in contact with.In addition, the contact-type heater 12 be provided with detect the contact-type add The temperature sensor 38 of the temperature of hot device 12.

Here, temperature sensor 38 is equivalent to the 2nd temperature sensor of the present invention.

In the refrigerator 100 formed in this way, in defrosting operating, using contact-type heater 12 to cooler 54 directly into Row heating, carries out the defrosting of cooler 54.Here, contact-type heater 12 is contacted with cooler 54, so being attached to cooling The frost cooling of device 54.Therefore, it is powered in defrosting operating to contact-type heater 12, when have passed through stipulated time t1, The frosting degree of cooler 54 is more, and the temperature rise of contact-type heater 12 is smaller.Therefore, it is possible to use the temperature rise To judge the frosting degree of cooler 54.

In this case, determination unit 62 for example judges the frosting degree of cooler 54 using the flow shown in Figure 23.

When being switched to defrosting operating since usual operating, that is defrosting operating when, determination unit 62 starts frosting The judgement (step S61) of amount.Then, in step S62, determination unit 62 obtains before being powered to contact-type heater 12 Take the detected value T4 i.e. temperature T4 of contact-type heater 12 of temperature sensor 38.After step S62, in step S63, control Portion 61 processed is powered to contact-type heater 12, begins to cool down the heating of device 54.In addition, contact-type heater 12 at this time Heating capacity is arbitrary.

After step S63, in step S64, timing unit 63 measures the heating time of contact-type heater 12.Then, When the time of measuring of timing unit 63 reaches the stipulated time t1 for being stored in storage part 64, in step S65, determination unit 62 obtains The temperature T5 of detected value T5, that is, contact-type heater 12 of temperature sensor 38, calculate from T5 subtract T4 obtained from subtraction value i.e. Temperature difference Δ T.Later, in step S66, whether 62 comparison temperature difference Δ T of determination unit judges than being stored in the 6th of storage part 64 the Value is big.Then, in the case where temperature difference Δ T is bigger than the 6th decision content, the frosting state of cooler 54 is determined as by determination unit 62 It is the 2nd few frosting state (step S67) of frosting degree.In addition, in the case where temperature difference Δ T is below the 6th decision content, judgement The frosting state of cooler 54 is determined as it being the 1st frosting state (step S68) more than frosting degree by portion 62.

More than, in the above embodiment 1 and embodiment 2, the frosting of cooler 54 is determined using 1 decision content Amount.Then, as shown in figure 24, on the basis of the decision content, increase heater in the case where frosting degree than the decision content more Heating capacity reduces the heating capacity of heater in the case where frosting degree is smaller than the decision content.However, the cooling in the present invention The determination method of the frosting degree of device 54 is not limited to such method.

For example, it is also possible to as shown in figure 25, the frosting degree of cooler 54 is judged using multiple decision contents.That is, The heating capacity of heater using each decision content as boundary, can also be increased in the case where frosting degree than decision content more, in frosting Reduce the heating capacity of heater in the case that amount is smaller than the decision content.Can heater be made according to the frosting degree of cooler 54 Heating capacity becomes more appropriate value.I.e. it is capable to more storeroom be inhibited to be heated, removed in addition, can more shorten The white time.In this case, in each decision content, state of the frosting degree more than decision content is equivalent to the 1st frosting shape of the present invention State, the frosting degree state smaller than decision content are equivalent to the 2nd frosting state of the present invention.

In addition, each value compared in the judgement of the frosting degree of cooler 54 with each decision content as described above with it is cold But the frosting degree of device 54 is in proportionate relationship.It thus, for example can also be as shown in figure 26 according to the knot in frosting degree, that is, cooler 54 Each value for being compared with each decision content continuously changes the heating capacity of heater in the judgement of frost amount.In other words, It can be that frosting degree is fewer, more reduce the heating capacity of heater.In this case, become the state of arbitrary frosting degree In the case of the 1st frosting state of the present invention, the frosting degree state fewer than the state all becomes the 2nd frosting state of the present invention.

In addition, the frosting amount determination operation of embodiment 1 and the cooler 54 shown in embodiment 2 is not can only one A one is implemented separately, and can also implement multiple frosting amount determination operations simultaneously.It can more accurately judge cooler 54 Frosting degree.

Claims

1. a kind of refrigerator, has：

Storeroom；

Wind path is connected with the storeroom；

Cooler is set to the wind path, and the air for flowing through the wind path is cooled down；And

Heater, in 1st frosting state of the frosting in the cooler and the frosting to the cooler than the 1st frosting The cooler is heated under the 2nd few frosting state of state,

The 1st defrosting operating heated using the heater to the cooler is carried out under the 1st frosting state, The 2nd defrosting operating heated using the heater to the cooler is carried out under the 2nd frosting state,

The heating capacity of the heater under 1st defrosting operating is the 1st capacity, described under the 2nd defrosting operating The heating capacity of heater is the 2nd capacity,

2nd capacity is smaller than the 1st capacity.

2. refrigerator according to claim 1, wherein, the refrigerator is configured to：

Under the 2nd defrosting operating,

In a state that the temperature of the cooler is smaller than specified value, the heating capacity of the heater is bigger than the 2nd capacity,

The cooler temperature to be more than the specified value after, the heating capacity of the heater, which becomes the described 2nd, to be held Amount.

3. according to refrigerator described in claims 1 or 2, wherein, have：

1st wiring portion has resistive element；

2nd wiring portion, it is low to be configured to the 1st wiring portion of resistance ratio, between the heater and power supply with the 1st wiring portion It is connected in parallel；And

Switch is switched to and has been connected with the power supply, the loop circuit of the 1st wiring portion and the heater or connection State the loop circuit of power supply, the 2nd wiring portion and the heater.

4. according to refrigerator described in claims 1 or 2, wherein,

The refrigerator has switch, and the switching is to the loop circuit for being connected with the 1st power supply and the heater or is connected with For giving the 2nd power supply of the different voltage of the 1st power supply and the loop circuit of the heater.

5. the refrigerator described in any one in Claims 1 to 4, wherein, have：

Determination unit, the frosting degree for judging the cooler are the 1st frosting state or the 2nd frosting state；And

Control unit controls the heating capacity of the heater according to the judgement result of the determination unit.

6. refrigerator according to claim 5, wherein,

The refrigerator has the 1st temperature sensor, and the 1st temperature sensor detects the temperature of the cooler,

The determination unit is configured to：When starting defrosting operating, from to the heater be powered after the stipulated time The 1st temperature sensor detected value subtract to the heater be powered before the 1st temperature sensor detection Value if value obtained from this is subtracted is bigger than the 1st decision content, is determined as that the frosting state of the cooler be the described 2nd Frosting state, if value obtained from this is subtracted be the 1st decision content hereinafter, if be determined as frosting shape to the cooler State is the 1st frosting state.

7. according to the refrigerator described in claim 5 or 6, wherein, have：

Door, opening and closing cover the opening portion of the storeroom freely；And

Door opening and closing sensor, detects the opening and closing of this,

The determination unit is configured to：According to the time until previous defrosting operating to this defrosting operating and in the time During the number that is opened and closed of the door speculate the frosting degree of the cooler, if the value deduced is the 2nd decision content Hereinafter, be then determined as that the frosting state to the cooler is the 2nd frosting state, if the value deduced is than described the 2 decision contents are big, then are determined as that the frosting state of the cooler be the 1st frosting state.

8. the refrigerator described in any one in claim 5~7, wherein, have：

Fan is set to the wind path, and the air cooled down by the cooler is sent to the storeroom；And

Sensor, detection are input to the current value of the fan or the amount of power consumption of the fan,

The determination unit is configured to：If the sensor detected value be the 3rd decision content hereinafter, if be determined as to the cooling The frosting state of device is the 2nd frosting state, if the detected value of the sensor is bigger than the 3rd decision content, is judged To be the 1st frosting state to the frosting state of the cooler.

9. the refrigerator described in any one in claim 5~8, wherein,

The determination unit is configured to：If the detected value of the 1st temperature sensor is bigger than the 4th decision content, it is determined as to institute The frosting state for stating cooler is the 2nd frosting state, if the detected value of the 1st temperature sensor is sentenced for the described 4th Definite value is hereinafter, be then determined as that the frosting state of the cooler be the 1st frosting state.

10. the refrigerator described in any one in claim 5~9, wherein,

The refrigerator has humidity sensor, which detects the humidity of the storeroom,

The determination unit is configured to：

The aggregate-value of the detected value of the humidity sensor until previous defrosting operating to this defrosting operating is obtained,

If the aggregate-value be the 5th decision content hereinafter, if be determined as that the frosting state of the cooler be the 2nd frosting shape State,

If the aggregate-value is bigger than the 5th decision content, it is determined as that the frosting state of the cooler be the 1st frosting State.

11. the refrigerator described in any one in claim 5~10, wherein,

The heater is the contact-type heater being placed in contact with the cooler,

The refrigerator has the 2nd temperature sensor, and the 2nd temperature sensor detects the temperature of the contact-type heater,

The determination unit is configured to：When starting defrosting operating, from to the contact-type heater be powered by regulation when Between after the 2nd temperature sensor detected value subtract to the contact-type heater be powered before the 2nd temperature The detected value of sensor if value obtained from this is subtracted is bigger than the 6th decision content, is determined as the frosting shape to the cooler State is the 2nd frosting state, if value obtained from this is subtracted for the 6th decision content hereinafter, if be determined as to described cold But the frosting state of device is the 1st frosting state.