CN101970962B - Refrigerator - Google Patents

Abstract

Provided is a refrigerator including: an adiabatic basket configured by a plurality of adiabatic partitions; an adiabatic partition unit to partition the adiabatic basket; a storage chamber separated by the partition unit; an infrared sensor having a temperature detection unit which detects an infrared ray amount emitted from an object stored in the storage chamber; and an infrared ray collecting member arranged deeper inside the storage chamber as compared to the infrared sensor. At least the inner wall of the infrared ray collecting member is formed so as to have a large heat holding effect.

Description

Freezer

Technical field

The present invention relates to a kind of freezer that utilizes infrared ray sensor.

Background technology

Recent years, along with the increase that the big capacity of freezer is needed, started selling through dwindling the freezer that idle space improves volumetric efficiency, and the freezer that aspect serviceability, carries out various designs.

Wherein, in the past, in freezer,, measure the air themperature in the case with thermistor etc. for the temperature in the detection case.For example, when putting into the food of heat,, measure the influence receive this hot food and the temperature of air in the heated case, thereby adjust amount of cooling water through a plurality of thermistors that in case, are provided with.But, in this freezer, and the actual temperature of undetermined food, therefore, in fact and whether do not know can cooling food.So, when cooling food, the cooling around, and meanwhile food is cooled to target temperature, therefore, it is very time-consuming that food itself is cooled to target temperature.Therefore, infrared ray sensor is set in case, detects the actual temperature of food, cool off running (for example, with reference to patent documentation 1).

Below, with reference to accompanying drawing, above-mentioned traditional freezer is described.

Figure 10 is the lateral longitudinal section of traditional freezer of being put down in writing in the patent documentation 1.Figure 11 is that the part of Figure 10 is amplified side cut away view.

As shown in the figure, the inside of the freezer main body 210 that will form by heat insulating box, as the storeroom space respectively independently topmost configuration refrigerating chamber 202, below configuration vegetable compartment 203, at foot configuration refrigerating chamber 204.Between refrigerating chamber 202 and vegetable compartment 203, across heat insulation partition wall, be set up in parallel temperature in the left and right sides and switch chamber 205 and ice-making compartment (not shown), in the front openings of each storeroom special-purpose door is set respectively, they can free switch.

The rear portion of vegetable compartment 203 configuration refrigerating chamber 204, temperature switch chamber 205, ice-making compartment etc. freezing with cooler 206 and make freezing with cooler 206 in the cold air of generation at the cooling Air Blast fan 207 of storing indoor circulation.Be used for the refrigeration of refrigerated compartment 202 and vegetable compartment 204 in freezing anterior position setting and use the fan (not shown) with refrigerating with cooler 208 with cooler 206.According to the driving of the compressor that in the Machine Room of lower body part, is provided with 209 and the switching controls of refrigerant flow path transfer valve, freezing with cooler 206 and refrigeration with the interactive cold-producing mediums of perhaps flowing through simultaneously of cooler 208.The Quilt with air conditioning cooling Air Blast fan 207 that is cooled is sent to each storeroom of cryogenic temperature band one side and refrigerated storage temperature band one side with refrigeration with fan, and respectively their coolings is controlled at set point of temperature.In addition, distribute to refrigerating chamber 204, ice-making compartment and temperature and switch chamber 205, blown through pipe special respectively and cool off from freezing cold gas of the discharging Air Blast fan 207 that is cooled with cooler 206.

Switch the infrared ray sensor 212 that is provided with in the chamber 205 in the recess 213 that is installed in end face in temperature.Opening at recess 213 is provided with gate mechanism 214, opens if detect the door of temperature switching chamber 205, and so, gate mechanism 214 is started working, and stops up the opening of recess 213.And, switch the door of chamber 205 and close if detect temperature, so, gate mechanism 214 is started working, and opens the opening of recess 213, from blow-off outlet 210 to the indoor cold air that blows out.Infrared ray sensor 212 detects by the temperature of the food 211 of this cold air cooling, simultaneously, becomes predefined temperature in order to make it, the running of control freeze cycle, and open near the pneumatic regulator that is provided with the blow-off outlet 210.Like this, adjustment is controlled at food 211 design temperature of regulation to indoor cold air import volume.

So, detect the surface temperature of object food 211 with infrared ray sensor 212, carry out the cooling running of required degree in case of necessity, cooling off running control efficiently.

But, in above-mentioned traditional structure, at the door of opening temperature switching chamber 205; When taking in the food of heat; In order to prevent the inflow because of outside air, warm air is trapped in temperature and switches in the box of chamber 205, and the door that detects temperature switching chamber 205 is opened; With the opening of gate mechanism obstruction recess, prevent that warm air from flowing in the recess.Therefore, must switch in the chamber 205 in temperature and be equipped with the switch that detects door switch; And with the gate mechanism of its interlock, so just had complicated structure.Particularly because of the switch of configuration gate mechanism and the door complicated like this moving part of switch simultaneously, for example, under foreign matter and dew and the frost situation peripheral attached to gate, the moving part generation malfunction of gate mechanism sometimes.For such problem; Particularly carry is being under the situation in the freezer that is used for prerequisite for a long time in 10 years with average life; There is the switch door because of repeatedly, the possibility increase of malfunction takes place, cause the such problem of reliability decrease of freezer.

In addition; Under the situation of using the complicated structure as above-mentioned conventional construction; Except the possibility that breaks down increased, also existence needed the electric power of run motor and control device, is difficult to according to energy-conservation mode the such problem of infrared ray sensor is set.

Past uses thermistor to measure in order to detect the temperature of ice-making disc set in freezer.For example, accumulate under the situation of temperature of the water in the ice-making disc in mensuration, measure the temperature of the water of ice-making disc indirectly with the thermistor that is configured in the ice-making disc bottom, the amount of cooling water of adjustment freezer is on whether the water of judging ice-making disc has simultaneously frozen.But, in this freezer, the temperature of the water of in fact not measuring in the ice-making disc to be accumulated, therefore, in fact and on not knowing whether water in the ice-making disc freezes, cooling is always turned round to finishing ice-making, until being cooled to target temperature.Therefore, there is very time-consuming such problem till the finishing ice-making.

Therefore, infrared ray sensor is set directly over ice-making disc, the heat energy of the water that is accumulated in the ice-making disc detects actual water temperature as ultrared amount of radiation through infrared ray sensor, cools off running (for example, with reference to patent documentation 2).

Below, with reference to the freezer of description of drawings patent documentation 2.

Figure 12 is the lateral longitudinal profile of traditional freezer of being put down in writing in the patent documentation 2.Figure 13 is that the part of traditional freezer is amplified side cut away view.

Like Figure 12, shown in Figure 13, the part in freezer main body (not shown) is provided with the household freezer (not shown), and the part in this household freezer is provided with ice-making compartment 301.In addition, the door 302 of the household freezer that takes out food and ice etc. is arranged, the back side in ice-making compartment 301 is provided with fan grid 303, in case, blows out cold air from the portion that blows out 304 of this fan grid 303, and the water 306 in ice-making compartment 301 in the ice-making disc 305 of setting is cooled.

Below, the top in ice-making compartment 301 is provided with heat-barrier material 307, configuration infra-red ray detection device 308 in the heat-barrier material 307 above ice-making disc 305.This infra-red ray detection device 308 detects from accumulating in the amount of radiation of the water radiation in the ice-making disc 305 with infrared ray sensor 309 through the light guide section 311 of the cylinder anchor clamps 310 of covering infrared ray sensor 309.

The water 306 that infrared ray sensor 309 obtains in the ice-making disc 305 is cooled into the thermal change when icing, and judges finishing ice-making, finishes the cooling down operation of household freezer, shows finishing ice-making simultaneously.

But, in above-mentioned traditional structure, configuration infra-red ray detection device 308 in ice-making compartment 301; Therefore; For example, human body with static spark (ESD) and when cleaning in the ice-making compartment 301 because of the friction generates static of towel etc., under the situation that this discharge energy is had an effect; Because the maloperation and the fault of infrared ray sensor 309; Perhaps the original paper of infrared ray sensor 309 itself damages, and exists the measuring ability of infrared ray sensor 309 to quit work and can't play a role, and causes the such problem of quality decline of freezer.

Patent documentation 1 TOHKEMY 2007-212053 communique

Patent documentation 2 TOHKEMY 2006-308504 communiques

Summary of the invention

The present invention is a kind of freezer, and it comprises: the heat insulating box that is made up of a plurality of thermal insulation areas; The heat insulation cutting part of cutting apart heat insulating box; The storeroom that divided part cuts; The infrared ray sensor of temperature detecting part with infrared ray amount of the collecting article radiation that detects from be incorporated in storeroom; At the infrared ray optically focused parts of comparing with infrared ray sensor more near the inboard position configuration of storeroom, the internal face at least of infrared ray optically focused parts forms according to the mode that hot confining force increases.

For the freezer of this structure,, increase the hot confining force of the internal face of the infrared ray optically focused parts within the vision that are positioned at infrared ray sensor for the variations in temperature of the field range that suppresses infrared ray sensor.As a result, can relax the temperature tracing property of infrared ray optically focused parts, improve the temperature stability of the field range of infrared ray sensor for the variations in temperature that causes because of external interference.Adopt simple more structure just can suppress the decline of the detection accuracy that influence (for example switch door and hot food) that the environment temperature because of the temperature detecting part of infrared ray sensor changes causes, and can improve the detection accuracy of infrared ray sensor.

In addition, be positioned at the variations in temperature of the infrared ray optically focused parts around the infrared ray sensor, also can suppress the variations in temperature around the infrared ray sensor, and can improve the detection accuracy of infrared ray sensor through minimizing.

Description of drawings

Fig. 1 is the major part side cut away view of the freezer in the embodiment 1 of the present invention.

Fig. 2 A is the side cut away view of the infrared ray sensor installation portion of this freezer.

Fig. 2 B is the major part enlarged drawing of Fig. 2 A.

Fig. 3 is the temperature sketch map relatively of the infrared ray light collecting part of the freezer of expression in the embodiment 1 of the present invention when opening the door.

Fig. 4 is the major part side cut away view of the freezer in the embodiment 2 of the present invention.

Fig. 5 A is the major part side cut away view of the freezer in the embodiment 3 of the present invention.

Fig. 5 B be this freezer refrigerating chamber get a bird's eye view plane.

Fig. 6 is the major part side cut away view of the freezer in the embodiment 4 of the present invention.

Fig. 7 is the side cut away view of the infrared ray sensor installation portion of the freezer in the embodiment 4 of the present invention.

Fig. 8 is the enlarged drawing of side section A portion of the infrared ray sensor installation portion of the freezer in the embodiment 4 of the present invention.

Fig. 9 be the freezer in the embodiment 4 of the present invention the infrared ray sensor installation portion directly over B get a bird's eye view plane.

Figure 10 is the lateral longitudinal profile of traditional freezer.

Figure 11 is the amplification side cut away view of the part of Figure 10.

Figure 12 is the lateral longitudinal profile of traditional freezer.

Figure 13 is that the part of traditional freezer is amplified side cut away view.

Symbol description

1,101 heat insulating box

2,102 freezer main bodys

3,103 refrigerating chambers (storeroom)

The heat insulation plate of cutting apart in 4,104 tops

The heat insulation plate of cutting apart in 5,105 bottoms

6,106 refrigerating chambers (storeroom)

7,107 vegetable compartment (storeroom)

8,108 dividing bodies

9,109 cold air generate the chamber

10,110 evaporimeters

11,111, pressure fan

12,112 defrosting heaters

13,113 infrared ray sensors

13a first infrared ray sensor

13b second infrared ray sensor

21,33,121,122 cold gas exhausting outlets

21a first cold gas exhausting outlet

21b second cold gas exhausting outlet

22,133 cold gas exhausting outlets

23,24,123,124

25,26,125,126 frameworks

27,127 epimere containers

28,128 hypomere containers

29,129 cool storage materials

30,130 cold air sucting inlets

31,131 food

32,132 stage casing containers

40,140 infrared ray light accepting parts

The configuration plane of 40a infrared ray light accepting part

41,141 substrates

42,142 thermistors

The configuration plane of 42a thermistor

43,143, infrared element

44,144, connector

45,145, distribution

46,146 metal wires

47,147 infrared ray mounting boxs

48,148 infrared ray optically focused parts

48a, the front end face of 148a infrared ray optically focused parts

The rear end face of 48b infrared ray optically focused parts

49,149 recesses

The front end face of 49a recess

50,150 openings

The internal face of 50a openings

The top ends of 50b openings

51,151 optically focused peristomes

The outer surface of 147a infrared ray mounting box in refrigerating chamber

152 juts

152a projection peristome

153 inclined plane parts

The specific embodiment

Freezer of the present invention comprises: the heat insulating box that is made up of a plurality of thermal insulation areas; The heat insulation cutting part of cutting apart heat insulating box; The storeroom that divided part cuts; Infrared ray sensor with the temperature detecting part that detects the infrared ray amount of sending from the collecting article that is incorporated in the storeroom; Comparing the infrared ray light harvesting parts that more are equipped with near the inboard position of storeroom with infrared ray sensor, the internal face at least of infrared ray optically focused parts forms according to the mode that hot confining force increases.

For the freezer of this structure,, increase the hot confining force of the internal face of the infrared ray optically focused parts within the vision that are positioned at infrared ray sensor for the temperature change of the field range that suppresses infrared ray sensor.As a result, can relax the temperature tracing property of infrared ray optically focused parts, improve the temperature stability of the field range of infrared ray sensor for the variations in temperature that causes because of external interference.Adopt simple more structure just can suppress the influence (for example, door switch and hot food) that the environment temperature because of the temperature detecting part of infrared ray sensor changes and the decline of the accuracy of detection that causes, and can improve the accuracy of detection of infrared ray sensor.

In addition, be positioned at the variations in temperature of the infrared ray light harvesting parts around the infrared ray sensor, also can suppress the variations in temperature around the infrared ray sensor, can also improve the accuracy of detection of infrared ray sensor through minimizing.

Freezer of the present invention comprises the infrared ray mounting box of taking in infrared ray sensor; On the part of infrared ray mounting box, be equipped with and connect the optically focused peristome that forms, bury the infrared ray mounting box in the recess that in heat insulation cutting part, forms underground according to the shape identical with the side of infrared ray optically focused parts.Through improving thermal capacity around the side of infrared ray optically focused parts with the bigger resin component of thermal capacity; And; Through reducing the variations in temperature of infrared ray optically focused parts; The environment temperature that can further suppress infrared ray sensor changes, and can further improve the detection accuracy of infrared ray sensor.

The front end face of the infrared ray optically focused parts of freezer of the present invention is imbedded in the face identical with the front end face of recess.Make the warm air that flows into because of the switch door cross the front end face of infrared ray optically focused parts, forming does not have concavo-convex same plane, thus the delay of the steam that from this food, distributes when eliminating the inflow of the warm air that causes because of the switch door and taking in food etc.As a result, variations in temperature is also little under the situation of opening door, therefore, can suppress the erroneous detection that rising that the rapid variation because of environment temperature causes and following degradation reason cause, and can improve the stability of the detection accuracy of infrared ray sensor.

The infrared ray optically focused parts of freezer of the present invention are made up of the metal that with aluminium is main component.Like this, even because of switch door warm air flows into, because of using having the metal of the good aluminium of heat conductivity concurrently as main component, thus the quickening thermo-responsive.Can improve the detection accuracy of infrared ray sensor.

The infrared ray optically focused parts of freezer of the present invention have hybrid resin and oxide powder, mix the oxide powder more than 85% and the electrical insulating property that constitutes.Like this, the detection accuracy of infrared ray sensor is descended, can guarantee the electrical insulating property of the various relevant decree defined of household appliances.

The openings that in the infrared ray optically focused parts of freezer of the present invention, is provided with has the height of front end face more than 3 millimeters apart from infrared ray sensor.Like this, if angle enlarges, so, the temperature detection face that infrared ray sensor detected also can increase, and detects the temperature beyond the face of setting probably, and the food of wanting to detect beyond the food is present in the temperature detection face probably.Like this, the height setting of openings more than 3 millimeters, is so just limited field-of-view angle, dwindled the temperature detection face, thereby can suppress the erroneous detection of infrared ray sensor to greatest extent, further improved the stability that detects accuracy.

Freezer of the present invention comprises: the heat insulating box that is made up of a plurality of thermal insulation areas; The heat insulation cutting part of cutting apart heat insulating box; The storeroom of being cut apart by heat insulation cutting part; Infrared ray sensor with the temperature detecting part that detects the amount of radiation of sending from the collecting article that is incorporated in the storeroom; The infrared ray optically focused parts with openings that in infrared ray sensor, are equipped with, and the projection peristome that is communicated with the openings of infrared ray optically focused parts of outfit are provided with the jut of a plurality of projections simultaneously around the projection peristome.According to the freezer of this structure, the frictional static in the time of can preventing to clean in the storeroom and the maloperation of the infrared ray sensor that causes and the damage of fault and infrared ray sensor element itself.

Periphery at the projection peristome is equipped with a plurality of juts; So can reduce the delay of the peripheral warm air of jut that the influence that the environment temperature because of infrared ray sensor changes (for example the food of switch door and heat etc.) causes, the detection accuracy of raising infrared ray sensor.

Freezer of the present invention forms jut on the surface of the infrared ray mounting box of taking in infrared ray sensor, the inclined plane part that forms according to the shape that does not have right angle portion in the arranged outside of jut.Like this, guarantee security prevent because of jut tangle damage that the position causes etc., and along inclined plane part to infrared ray sensor front end face guiding convection current.So just can suppress the delay of the warm air of infrared ray sensor periphery, reduce and the thermograde of infrared ray sensor, and can improve the detection accuracy of infrared ray sensor.

In addition, the outer surface of storeroom one side of the front end face of the infrared ray optically focused parts of freezer of the present invention and infrared ray mounting box roughly at grade.Like this, remove the step of infrared ray mounting box and infrared ray optically focused parts, eliminate the trapping phenomena of the steam that from this food, distributes when the warm air that causes because of the switch door flows into and take in food etc.As a result, variations in temperature is also little under the situation of opening door, therefore, can suppress the erroneous detection that rising that the rapid variation because of environment temperature causes and following degradation reason cause, and can improve the stability of the detection accuracy of infrared ray sensor.

Below, with reference to description of drawings embodiment of the present invention.In addition, the present invention is not limited to this embodiment.

(embodiment 1)

Fig. 1 is the major part side cut away view of the freezer of embodiment 1 of the present invention, and Fig. 2 A is the side cut away view of the infrared ray sensor installation portion of this freezer, and Fig. 2 B is main the enlarged drawing of Fig. 2 A.

In Fig. 1, Fig. 2 A, be divided into different refrigerating chamber of temperature band 6 and vegetable compartment 7 by the heat insulation dividing body 5 in bottom of heat insulation dividing body 4 in the top of top and below as the refrigerating chamber 3 of the part of the storeroom of the freezer main body 2 that constitutes by heat insulating box 1.In addition, be provided with the dividing body 8 of the right ends that connects its peristome at the peristome (not shown) of refrigerating chamber 3.

In this embodiment; Dividing body 8 is the right ends of connection opening portion only, still, refrigerating chamber 3 is being divided into two parts up and down; Under the situation of any part wherein as the storeroom of the temperature band that for example can set other for; Dividing body 8 also can be according to the mode of cutting apart up and down, as is divided into the heat insulation dividing body 5 in bottom of heat insulation dividing body 4 in top and below, forms heat insulation dividing body along the entire profile.

Generate the evaporimeter 10 that disposes generation cold air in the chamber 9 at the cold air that is set at refrigerating chamber 3 back sides; And respectively to refrigerating chamber 6, refrigerating chamber 3 and vegetable compartment 7 cool-air feeds and make the pressure fan 11 of its circulation, the defrosting heater 12 that when the lower space configuration defrosting of evaporimeter 10, is energized.In addition, be provided with cold air distributor chamber 19 at the back side of refrigerating chamber 3, and a plurality of cold gas exhausting outlets of linking to each other with cold air distributor chamber 19 of conduct, cold gas exhausting outlet 21, cold gas exhausting outlet 22 and cold gas exhausting outlet 33 be provided with.

Peristome at refrigerating chamber 3 is provided with door 23 and door 24, is used for closing refrigerating chamber 3 so that the cold air of refrigerating chamber 3 can not flow out.Door 23 all is sliding doors with door 24, and when picking and placeing food, it is towards nearly body one side of freezer, and promptly the left direction of position shown in Fig. 1 is drawn out.In addition, be respectively equipped with framework 25,26 at the rear of door 23 and door 24.On this framework 25,26, put epimere container 27 and hypomere container 28 respectively.

On detection faces, put cool storage material 29 as the one side relative of epimere container 27 bottom surfaces with infrared ray sensor 13.Generally speaking, to be configured to solidification point than frozen food low and than high subzero 15 ℃ of the temperature of refrigerating chamber 3 for the fusion temperature of this cool storage material 29.In addition, the loading of cool storage material 29 is configured in the amount of throwing on the cool storage material 29, also can not melt fully under the situation of fabricated food.Adopt ABS resin to form as the inboard wall of the case of the heat insulation dividing body 4 in top of the wall that infrared ray sensor 13 has been installed.In addition, other chamber interior wall face of refrigerating chamber 3 adopts ABS resin to form too, and epimere container 27 forms with the PP resin that hypomere container 28 adopts the thermal characteristics ordinary resin similar with ABS resin to constitute.

In addition, be provided with in the lower backside of refrigerating chamber 3 and be used for sucking cold air, it is guided to the cold air sucting inlet 30 of evaporimeter 10.

Food 31 persons' of being used hand shovelling is put, is kept on the cool storage material 29.

Infrared ray sensor 13 generally is made up of infrared element portion 43, and its built-in infrared ray amount of sending from object within the vision that detects converts thereof into the infrared ray light accepting part 40 of the signal of telecommunication; And the fiducial temperature of measuring the environment temperature of infrared ray light accepting part 40, convert thereof into the thermistor 42 of the signal of telecommunication.

In this embodiment; Temperature to detect food 31 is a purpose; But infrared ray sensor 13 also detects the temperature of the article within the vision of infrared ray sensor 13 in the temperature that detects food 31; Therefore, detect the infrared ray amount of sending from the wall of refrigerating chamber 4 and food 31 and the cool storage material 29 etc. that are incorporated in the refrigerating chamber 4.At this moment, the environment temperature of measuring infrared ray light accepting part 40 is as fiducial temperature.

The metal wire 46 that is electrically connected with infrared element portion 43, connector 44 and the substrate 41 that is printed the distribution (not shown) are electrically connected, and the distribution 45 of the control substrate (not shown) of control freezer is electrically connected with connector 44.

Infrared element portion 43 is to the voltage of the infrared ray amount of the voltage of the fiducial temperature of control substrate (not shown) output thermistor 42 and infrared ray light accepting part 40; Thereby calculate the temperature of the mensuration thing that is detected, in the control device (not shown), judge according to the detected temperatures of calculating.

Infrared ray optically focused parts 48 according to the state of infrared element portion 43 thermo-contacts under cover infrared element portion 43 around; And with and substrate 45 between do not have the mode in slit to be provided with; In order to reject the infrared ray of the external interference of sending from food 31 and article beyond the cool storage material 29; Improve detected intensity, the openings 50 of θ ° of limits vision angle is set, to guide to infrared ray light accepting part 40.Like this, owing to have light-focusing function, therefore, in this embodiment, the top ends 50b of the openings of infrared ray optically focused parts 48 is more than 3 millimeters to the height of the rearward end 50c of openings, and like this, field-of-view angle just becomes 30 °～60 °., be approximately at the height of epimere container 27 under 110 millimeters the situation, field-of-view angle preferably is approximately 50 ° here.

Here, openings 50 is inner at the circle of detection range, and the infrared detection intensity at center is the strongest, more to the end detected intensity more a little less than.Therefore, through further dwindling the field-of-view angle of infrared ray sensor, thereby the intensity that infrared ray sensor food 31 grades within the vision detect the infrared ray amount of thing can be improved, the temperature of object can be accurately detected more conscientiously.But, because the top ends 50b of the internal face 50a of the part of field-of-view angle and openings and openings is overlapping, therefore, receive the temperature effect of top ends 50b of internal face 50a and the openings of openings, become the main cause of erroneous detection.Like this; Internal face 50a for the openings at least of the infrared ray optically focused parts 48 within the vision that are positioned at infrared ray sensor; For example preferably make it because of opening under the situation that the interference that flows into warm air at closing time causes variations in temperature; Also can relax temperature tracing property, carry out stable detection this interference.In this embodiment, the hot confining force for the internal face 50a of the openings that increases infrared ray optically focused parts 48 through improving heat conductivity, increases thermal capacity, and the hot confining forces of infrared ray optically focused parts 48 itself are increased.

Here; Hot confining force among the present invention is meant, acts under the situation of ambient air in the thermic load of variations in temperature etc., and expression is for the response of the temperature tracing property of these variations in temperature; Promptly; Under the situation of thermic load effect, the direction of temperature tracing property difference is the direction that hot confining force increases, and the direction that tracing property is good is the direction of the little minimizing of hot confining force.This thermal capacity can be represented with the for example thermal exposure of the per surface area of the aerial one side of component exposed.Specifically, for example identical even infrared ray optically focused parts 48 are exposed to airborne surface area, the volume of infrared ray optically focused parts 48 is big; Hot confining force also can increase, in addition, even volume is identical; If use the big material of thermal capacity, so, its hot confining force also can increase.

Below, operation and the effect of adopting the freezer that aforesaid way constitutes described.

At first, after the energized, the running of beginning freeze cycle (not shown), the cold-producing medium evaporimeter 10 of flowing through generates cold air then.The Quilt with air conditioning pressure fan 11 that is generated is sent to cold air distributor chamber 19, is assigned with then from cold gas exhausting outlet 21 and cold gas exhausting outlet 22 and in refrigerating chamber 3, discharges.

Refrigerating chamber 3 is discharged to the temperature that refrigerating chamber 3 interior cold air are cooled to regulation, and simultaneously, cool storage material 29 also is cooled.At this moment, refrigerating chamber 3 is adjusted to the temperature that can food product refrigeration be preserved certain hour, for example subzero 20 ℃; But, because cool storage material 29 uses fusion temperature to be set in subzero 15 ℃ material, therefore; After refrigerating chamber 3 is cooled off fully and is passed through certain hour; Cool storage material 29 becomes the state that freezes fully, and the cold air in the cooling refrigerating chamber 3 gets into cold air from cold air sucting inlet 30 and generates chamber 9, is evaporated device 10 coolings once more.

For example; When the environment temperature as the infrared ray sensor 13 of fiducial temperature is 25 ℃; If from the voltage of infrared ray sensor 13 outputs is V, the environment temperature of in thermistor 42, measuring is S, and the mean temperature of in measurement range, in infrared ray light accepting part 40, measuring the infrared ray amount of infrared ray amount is B; So, the temperature detection of infrared ray sensor 13 is represented with relational expression " V=α (B4-S4) ".The α here is a coefficient.

Therefore, if there is not the temperature difference of the mean temperature B of environment temperature S and infrared ray amount, so; The numerical value of the voltage V that infrared ray sensor 13 is exported is near 0; The temperature that becomes benchmark is the temperature S of measurement range, if the temperature difference is big, so; The infrared ray amount that in infrared ray light accepting part 40, detects will increase, and the voltage of being exported also can increase.

So; Under the situation of the food of throwing in temperature; Under the situation that the environment temperature S as the infrared ray sensor 13 of fiducial temperature also increases thereupon; The temperature difference of environment temperature S and mean temperature B diminishes, and under the situation of the food of throwing in temperature, also can't detect and put into the high relatively food of temperature, and the detection accuracy of infrared ray sensor 13 descends.

As stated, if the temperature of thermistor 42 can not keep stable temperature because of external interference changes, so, under the situation such as food of putting into temperature, infrared ray sensor 13 just can detect correct temperature.

The detected temperatures of infrared ray sensor 13 comprised the surface temperature of the cool storage material 29 that the bottom surface of the epimere container 27 of the detection faces that is equipped with as the relative side at infrared ray sensor 13 disposes when secondly, door 23 was closed.Like this, adopt the cool storage material 29 with cool storage function to form the detection faces of infrared ray sensor 13, the hot confining force in the detection faces also can strengthen like this.For example, under the situation that receives external interference such as warm air inflow, the hot confining force of the detection faces of infrared ray sensor also can increase; Can alleviate the temperature tracing property that disturbs to external world; Therefore, be not vulnerable to the influence of temperature variation that external interference causes, can keep stable temperature; Therefore, can obtain higher detection accuracy.In the case, disposed the detection faces of cool storage material 29 and compared with the surface of the epimere container 27 of the part that does not dispose cool storage material 29, the hot tracing property of the variation of environment temperature is poor, so just can relax the temperature tracing property that disturbs to external world.In other words, disposed the detection faces of cool storage material 29 and compared with the surface of the epimere container 27 of the part that does not dispose cool storage material 29, the thermal exposure of unit are is little, thereby can strengthen hot confining force.

So; In this embodiment, the bottom surface both sides of the epimere container 27 of the detection faces that is equipped with as the internal face 50a of the openings of the infrared ray optically focused parts 48 within the vision that are positioned at infrared ray sensor 13 with as a relative side at infrared ray sensor 13, promptly; The whole visual field scope of infrared ray sensor 13 adopts the big parts of hot confining force to form; Like this, taking place also to relax the temperature tracing property of the part within the vision that is positioned at infrared ray sensor under the situation of temporary transient variations in temperature because of external interference; Therefore, infrared ray sensor 13 can detect the temperature as the food 31 of temperature detection object more exactly.

When the user took in food 31, for example, door 23 was drawn out, and at this moment, the temperature detection of infrared ray sensor 13 detects the temperature in the hypomere container 28.In this embodiment; Under the situation that door 23 is opened; As being the cryogenic temperature scope of same temperature ranges stated basically in the hypomere container of the detection faces relative with infrared ray sensor 28 with as the bottom surface of the epimere container 27 of original detection faces, therefore, infrared ray sensor 13 detects cryogenic temperature; Do not carry out the high detection of temperature, thereby can prevent to carry out unnecessary snap frozen control.

So, in storeroom, be equipped with under the situation of infrared ray sensor, if be equipped with the door switch sensor of the switch of detecting gate with drawing and pulling type door; So, detect opening of going out, stop the detection of infrared ray sensor then; Thereby can prevent erroneous detection, still, shown in this embodiment; Be not equipped with under the situation of door switch sensor; The erroneous detection that changes along with opening of door for the detection faces that prevents at infrared ray sensor, the detection side of infrared ray sensor upwards, the adjacent best conduct of storeroom and be equipped with the storeroom uniform temp band of infrared ray sensor or the storeroom of low temperature band on the detection faces projection line.If this adjacent storeroom is the storeroom of high-temperature band, so, will detect high temperature, on freeze cycle so load begins to promote to quicken cooling, thereby consumes unnecessary energy.

So; Shown in this embodiment, be not equipped with under the situation of door switch sensor, and at the detection side of the infrared ray sensor best conduct of storeroom that upwards storeroom of the outfit infrared ray sensor on the detection faces projection line the is adjacent temperature band identical or the storeroom of low temperature band with the storeroom that is equipped with infrared ray sensor; Like this; Just can prevent the erroneous detection of door when opening, further improve and detect accuracy, thus can realize energy-conservation, cool off the freezer of freezing load conscientiously.

Then; Door 23 becomes open mode, and extraneous warm air flows into from the opening surface of door 23, and warm air flows along the heat insulation plate 4 of cutting apart of the epimere of the end face of refrigerating chamber 3; The top ends 50b of the openings of infrared ray optically focused parts 48 and the front end face 49a of recess 49 are on same plane; Therefore, variations in temperature is also little under the situation of opening door, therefore; The erroneous detection that rising that the rapid variation because of environment temperature causes and following degradation reason produce can be suppressed, and the stability of the detection accuracy of infrared ray sensor 13 can be improved.

In addition; The temperature of the top ends 50b of the openings of infrared ray optically focused parts 48 raises; The hot confining force of infrared ray optically focused parts 48 is big, therefore, even warm air flows into; Also be difficult to the appearance temperature gradient at the top ends 50b of the openings of infrared ray optically focused parts 48 to the part of the rearward end 50c of openings, the temperature of whole infrared ray optically focused parts 48 is maintained at the temperature of homogeneous.Infrared ray sensor 13 becomes the state that does not have the temperature difference with environment temperature, can improve the detection accuracy of infrared ray sensor 13.

The temperature of the infrared ray light collecting part when Fig. 3 representes opening the door in the freezer of embodiment 1 of the present invention is relatively used Fig. 3 here, explains and opens the hot confining force of the material of infrared ray optically focused parts 48 at closing time, the comparison of instant heating tracing property.

In this embodiment,, the material as traditional freezer internal face is promptly compared common ABS resin and high pyroconductivity resin material for infrared ray optically focused parts 48; Wherein, High pyroconductivity resin material is a main component with the aluminium that improves heat conductivity and increase thermal capacity, with ABS resin mutually the specific heat confining force increase, and except cost slightly high; Outside pyroconductivity and the thermal capacity height, adopt oxide powder to constitute with electrical insulating property.In addition, also carried out the experiment that the material to (shell is arranged) around the material that is exposed to (no shell) in the air around the powder metal-resin material and the low shell covering of these optically focused parts of thermal conductivity ratio compares.

Specifically, it is main component that powder metal-resin material adopts with aluminium, the high pyroconductivity resin material that dispersing and mixing forms in PPS, ABS, LSP resins such as (liquid crystal polymers) then.Main component also can be used any one in silica, the magnesia.

For experiment condition; Being set at outside air temperature is in 38 ℃ of freezers under the condition; Door being maintained at subzero 17.5 ℃ refrigerating chamber was opened for 20 seconds under the situation of (between 10 seconds～30 seconds of abscissa) shutting then, be determined at the detected temperatures that infrared ray sensor detected that is equipped with in the refrigerating chamber through the temperature behind the certain hour.

According to Fig. 3,, open under the situation in 20 seconds will remaining on subzero 17.5 ℃ storeroom for the common ABS resin in past; Temperature rise to subzero more than 3 ℃ after; Temperature slowly descends, and still, shuts behind the door through 70 seconds; Can not become subzeroly below 15 ℃ yet, can not return initial temperature.In this experiment, do not compare, same with this ABS resin, common PP resin etc. also has same temperature characterisitic.

In contrast to this, adopting aluminium to form under the situation of optically focused parts, when opening, temperature temporarily rises near subzero 7 ℃, and still, temperature descends rapidly subsequently, is shutting 20 seconds behind the door, and temperature drops to subzero 17.5 ℃ of original temperature.This be because, the hot confining force of aluminium is big, therefore; The temperature of the internal face of the optically focused parts that air in the storeroom on temporary transient and surface and extraneous warm air contacts raises, and still, the optically focused parts of aluminium itself have kept opening the preceding subzero 17.5 ℃ temperature that has been kept; Therefore, shutting behind the door, its temperature conducts to the internal face of optically focused parts rapidly; Cold and hot because of what before door is opened, saved bit by bit; The internal face of optically focused parts also drops to the temperature of optically focused parts, and like this, the detected temperatures of infrared ray sensor descends rapidly.

Below, same with aluminium under the situation that adopts the powder metal-resin, when opening; Temperature temporarily rises near subzero 7 ℃, and still, temperature descended subsequently rapidly, at 20 seconds that shut behind the door; Temperature drops to following 17.5 ℃ of original zero temperature, and this is also with above-mentioned same, because hot confining force is big, therefore; The temperature rising of the internal face of the optically focused parts that the air in the storeroom on temporary transient and surface contact with extraneous warm air, still, the optically focused parts itself have kept opening the preceding subzero 17.5 ℃ temperature that has been kept, therefore; Shutting behind the door, its temperature conducts to the internal face of optically focused parts rapidly, and is cold and hot because of what before door is opened, saved bit by bit; The internal face of optically focused parts also drops to the temperature of optically focused parts, and like this, the detected temperatures of infrared ray sensor descends rapidly.

Below, be equipped with the shell that ABS resin constitutes in the periphery of powder metal-resin and promote parts as heat-resisting maintenance, under the situation of opening door, temperature can not rise much yet, and the temperature of opening after 20 seconds rises to subzero 15 ℃ and 2.5 ℃.Then, shut behind the door 20 seconds after, the detected temperatures of infrared ray sensor is dropped rapidly to original subzero 17.5 ℃.

Its reason is that peripheral part is promoted parts to surround by heat-resisting maintenance, like this, and under the situation that warm air flows into; Thermal-radiating surface area further dwindles, and heat radiation is suppressed, therefore, even only the internal face of optically focused parts contacts with warm air; According to the hot confining force of whole optically focused parts, the internal face temperature can not rise immediately yet, therefore, shuts behind the door; Therefore the subzero 17.5 ℃ temperature same with above-mentioned aluminium, that the optically focused parts have been kept before itself having kept door to open, is shutting behind the door; Its temperature conducts to the internal face of optically focused parts rapidly, and is cold and hot because of what before door is opened, saved bit by bit, and the internal face of optically focused parts also drops to the temperature of optically focused parts.

So; For infrared ray optically focused parts 48; In order to strengthen hot confining force; As the traditional optically focused parts and the material of chamber interior wall face, adopt and compare with common ABS resin, the material that metals such as the aluminium that heat conductivity and hot confining force are high, titanium, stainless steel, iron, copper perhaps comprise these metals forms.Particularly high, and part surface exposes the viewpoint of configuration in the refrigerating chamber 3 from light weight, pyroconductivity and thermal capacity, preferably with the high aluminium of corrosion resistance as main component.

In addition, expose and under the situation about using the maloperation of the infrared ray sensor 13 that static generation causes and the damage of element itself in the refrigerating chamber 3 for the friction of generation such as rag that prevent to wait in user's cleaning box and human body are charged on a part of surface; In the powder metal-resin, adopt electric insulation, the oxide powder resin that pyroconductivity and thermal capacity are high; For example, use with in aluminium oxide and silica, the magnesia any one as main component, the material of dispersing and mixing in PPS, ABS, LSP resins such as (liquid crystal polymers); Thereby also can improve hot confining force; In the case, it possesses high hot confining force and high thermal conductivity and electrical insulating property, for its mixed proportion; According to the weight rate oxide powder preferably more than 80%; For electrical insulating property, be more than 1.0 * 1014 Ω m according to the resistivity identical with common resin component, also can satisfy the electrical insulating property of the various decree defineds of household appliances.

In addition, using infrared ray sensor 13 to detect under the situation of temperature of the collecting article of in storeroom, taking in, the variations in temperature that causes because of the switch door; Be easy to generate top ends 50b and the thermograde of rearward end 50c of internal face 50a of the openings of infrared ray optically focused parts 48, therefore, the part by weight of oxide powder is greatly about more than 85%; So; Pyroconductivity improves, and pyroconductivity is preferably more than the 2W/mK, and the thermal capacity of unit mass is preferably more than 750J/kg ℃.

As stated, the internal face at least of infrared ray optically focused parts 48 is compared with the wall as the ABS resin on the inboard surface of the heat insulation freezer of cutting apart plate in the top of the wall that infrared ray sensor has been installed, and poor to the tracing property of variations in temperature, that is, hot confining force is big.

In addition; In this embodiment; Heat-resisting maintenance as the hot confining force that improves infrared ray optically focused parts 48 promotes parts to use infrared ray mounting box 47; With the optically focused peristome of infrared ray mounting box 47 51 surround infrared ray optically focused parts 48 around, thereby improve thermal capacity, further reduce the variations in temperature of infrared ray optically focused parts 48.

In the case; Infrared ray mounting box 47 has the function as the heat insulating member on every side that surrounds infrared ray optically focused parts 48; The outer surface that prevents infrared ray optically focused parts 48 is exposed in the outside air, therefore, reduces the area that infrared ray optically focused parts 48 contact with outside air; And slow down the variations in temperature of the infrared ray optically focused parts of uniform temperature; Thereby can further relax the tracing property for the variations in temperature that causes because of external interference, improve hot confining force, infrared ray mounting box 47 has as the heat-resisting maintenance promotion functions of components that can improve hot confining force.

In addition, in this embodiment, promote parts as heat-resisting maintenance; Cover the outer surface at least of infrared ray optically focused parts 48 and constitute with infrared ray mounting box 47, still, if adopt thermal conductivity ratio infrared ray optically focused parts 48 low parts to form; It so, also can be other structure.For example, around infrared ray optically focused parts 48, embed parts such as rubber and butyl, also can promote parts as heat-resisting maintenance, in the case, the function of the seal member in the time of also bringing into play as other parts of installation.In addition, generally speaking, can be employed in also that employed ABS resin forms in the chamber interior wall face of freezer, embed infrared ray optically focused parts therein.And; Adopting the heat insulating member that low material constitutes by pyroconductivity to surround in the structure on every side of infrared ray optically focused parts 48; Can further improve the hot confining force of infrared ray optically focused parts 48; Further relax tracing property, can be equipped with infrared ray sensor with stable detection accuracy to variations in temperature.

So; Through using heat-resisting maintenance to promote parts; Internal face as the infrared ray optically focused parts of the wall in the detection range of infrared ray sensor is compared with common freezer internal face; Promptly compare, can reduce the thermal exposure of unit are, and can be equipped with infrared ray sensor with stable detection accuracy with ABS resin.

In addition; For too as the food putting surface of the large-area detection faces in the wall in the detection range of infrared ray sensor; With common freezer internal face is that ABS resin is compared; Through increasing hot confining force, can dwindle the thermal exposure of unit are, and can be equipped with infrared ray sensor with stable detection accuracy.So; All faces in the detection range of infrared ray sensor are compared with the ABS resin on the wall surface that has been equipped with infrared ray sensor, increase hot confining force, thereby can dwindle the thermal exposure of unit are; And can further relax the temperature tracing property that promptly can not worsen the variations in temperature that causes for inflow because of warm air; Therefore, can suppress the variations in temperature of the detection faces of infrared ray sensor, be equipped with infrared ray sensor with stable detection accuracy.

In addition; For infrared ray mounting box 47; At the optically focused peristome 51 of the part setting that roughly is positioned at the center according to the shape perforation identical with the side of infrared ray optically focused parts 48; In this optically focused peristome 51, take in infrared ray optically focused parts 48, infrared ray sensor 13 is installed in the infrared ray mounting box 47.In addition; The face of infrared ray light accepting part 40 is parallel with the front end face 48a of infrared ray optically focused parts; Stretching into the front end face 48a of the infrared ray optically focused parts in the refrigerating chamber 3 and the outside of infrared ray mounting box 47 is set up at grade; Thereby the minimizing step, like this, regardless of the on off state of door 23, door 24; Wind all is easy to flow along the heat insulation plate 4 cut apart of the epimere of the end face of refrigerating chamber 3, is difficult to be detained because of warm air the thermograde of rearward end 50c of top ends 50b and the openings of the openings that produces infrared ray optically focused parts 48.

In addition; Shown in Fig. 2 B, in this embodiment, the cross section on the conical summit of the cut-out of the internal face 50a of the openings of infrared ray optically focused parts 48 is trapezoidal; The diameter on base is 2.5mm; At detection faces one side diameter is that the section of 3.9mm forms the shape on trapezoidal, and high 4mm, surface area are 40.73mm.

In addition; For infrared ray optically focused parts 48, and compare, towards extending as heat insulation plate 4 one sides of cutting apart in the opposite top of a side that puts food 31 of detection faces as the configuration plane 40a of the infrared ray light accepting part of ultrared detection faces or the configuration plane 42a of thermistor; Form the rear end face 48b of infrared ray optically focused parts; In the inside of infrared ray optically focused parts 48, clip infrared ray light accepting part 40 and thermistor 42, form the space that is surrounded by infrared ray optically focused parts 48 in both sides.

So; Configuration infrared ray light accepting part 40 and thermistor 42 in the space of the center of circle of infrared ray optically focused parts 48 side; Like this, the hot confining force that improves infrared ray optically focused parts 48 just is directly connected to the variations in temperature that suppresses infrared ray light accepting part 40 and thermistor 42 self.

As stated, the volume of infrared ray optically focused parts 48 is to compare 745.935 cubic millimeters of at double above volume with the part of performance light-focusing function, therefore, compares for 40.73 square millimeters with surface area, can realize enough big thermal capacity.

In addition, the volume of infrared ray optically focused parts 48 constitutes according to the back side one side of the configuration plane 40a of the infrared ray light accepting part top big mode of one side than the configuration plane 40a of infrared ray light accepting part.Promptly; The configuration plane 40a of infrared ray light accepting part is big to the volume of the front end face 48a of infrared ray optically focused parts to the configuration plane 40a of the volume ratio infrared ray light accepting part of rear end face 48b one side of infrared ray optically focused parts; Like this; Just can further increase the thermal capacity of rear end face 48b one side of the infrared ray optically focused parts that are difficult to receive the outside air influence, and can further relax the variations in temperature that ambient air causes, form the high optically focused parts of heat endurance.

As stated, in this embodiment, the internal face at least of infrared ray optically focused parts 48 is compared with the wall of the storeroom that infrared ray sensor has been installed, and the hot confining force of unit volume increases.

Like this; Variations in temperature for the field range that suppresses infrared ray sensor; The internal face that is positioned at the infrared ray optically focused parts within the vision of infrared ray sensor can relax the temperature tracing property for the variations in temperature that causes because of external interference such as warm air inflows; Can improve the temperature stability of the field range of infrared ray sensor; The simple more structure of employing just can suppress to descend because of the detection accuracy that the influence of the environment temperature variation of the temperature detecting part of infrared ray sensor (the for example food of switch door and heat) causes, and can improve the detection accuracy of infrared ray sensor.

In addition, if use in this embodiment employed with aluminium as the metal of main component or powder metal-resin as the optically focused parts, so, the inner wall surface thereof temperature; The surface temperature that promptly contacts with air temporarily changes, and still, for so temporary transient interference, returns original state immediately; Therefore, under the situation that external interference such as warm air inflow are arranged, the hot confining force of the detection faces of infrared ray sensor is high; Also can relax the temperature tracing property that disturbs to external world, therefore, more not be vulnerable to the influence of temperature variation that external interference causes; Stable temperature can be kept, therefore, higher detection accuracy can be obtained.

In addition; If the temperature and the thermistor 42 on infrared ray optically focused parts 48 tops have the temperature difference; So, detecting the temperature of infrared ray optically focused parts 48 top ends, is a reason that causes the detection accuracy variation of infrared ray sensor 13 by the detected temperature of infrared ray sensor; But; In this embodiment, not only can dwindle the temperature difference between the front end face 48a of internal face and infrared ray optically focused parts of thermistor 42 and infrared ray optically focused parts 48, and can use and detect the infrared ray sensor that accuracy is further enhanced.

At least the internal face of infrared ray optically focused parts 48 with compare as the ABS resin wall of the inboard wall of the heat insulation case of cutting apart plate in the top of the wall that infrared ray sensor has been installed, poor to the tracing property of variations in temperature, promptly; Hot confining force is big; Therefore, more be not vulnerable to the influence of temperature variation that external interference causes, thereby can keep stable temperature; Therefore, can obtain higher detection accuracy.

Therefore; Around the big infrared ray light collecting part 48 encirclement infrared ray sensors 13 of pyroconductivity, like this, (for example absorb infrared ray sensors 13 interference effect on every side with infrared ray optically focused parts 48; The variations in temperature that the food of switch door and heat causes); The temperature of infrared ray sensor 13 and infrared ray optically focused parts 48 homogeneous that becomes, the variations in temperature around the infrared ray sensor 13 diminishes, through reducing the heat affecting that external interference produces; Suppress variations in temperature, so just can improve the detection accuracy of infrared ray sensor 13.

In the present invention, in the epimere container 27 that infrared ray sensor 13 detects, detect the infrared ray amount that the load of food etc. sends; The temperature of calculating according to the infrared ray amount is (a upper limit design temperature: under situation TO) more than the uniform temperature; Automatically get into quick-frozen control, and, after setting quick-frozen control; The temperature that infrared ray sensor 128 detects is (lower limit set a temperature: under situation T1), finish quick-frozen control below the uniform temperature.

As the operation of quick-frozen control, put into food, the detected temperatures that detects infrared ray sensor 13 is more than the T0 of beginning temperature, so, the rotating speed of freezer compressor (not shown) is increased, and improves the refrigerant amount of circulation, reduces the temperature of evaporimeter 10.And, also increase the rotating speed of cold air pressure fan 11, increase the amount of cooling water that the cold air that in evaporimeter 10, generates is circulated in freezer, thus cooling food 31 fast.Then, continue to detect the temperature of food 31, confirm as behind 0 ℃ of maximum ice crystallization generating zone～subzero 5 ℃ the passing through, if become lower limit set temperature T 1 as end temp; So, finish quick-frozen control automatically, make it become common cooling operation; Make it fast through food preservation being influenced the maximum ice crystallization generating zone of its freshness, after passing through maximum ice crystallization generating zone, even adopt common cooling; Also can influence the decline of freshness hardly, therefore, adopt running usually.In this embodiment, the beginning temperature of quick-frozen control, promptly the T0 as ceiling temperature is subzero 2.5 ℃, the end temp of quick-frozen control, promptly the T1 as lower limit temperature is subzero 15 ℃.Its reason is, because of the mode of taking in of food is different with the state of food itself, presents different state.

So, in this embodiment, get into the control of freezing rapidly (quick-frozen) automatically, improve cooling capacity automatically, therefore, can under cooling operation as required, carry out the refrigeration of freezer.Particularly for rising because of the temperature that increases in the load freezer; And the load of quick freezing is wanted in cooling; With the past that kind according to middling speed rotation running compressor lentamente the mode of cooling load compare, adopt the mode of the cooling of efficient short time to shorten the duration of runs, reduce actual freezer power consumption; Therefore, more energy-conservation freezer can be provided.

Carrying out under this automatic quick-frozen situation, if the detection accuracy of infrared ray sensor 13 is poor, so; Will exist quick-frozen control invalidly to begin such problem; But, in this embodiment, owing to further improved the detection accuracy of infrared ray sensor 13; Therefore, can more accurately carry out automatic quick-frozen.

As implied above, in this embodiment 1, have the heat insulating box that a plurality of thermal insulation areas constitute; The heat insulation cutting part of cutting apart heat insulating box; The storeroom that divided part cuts; Has the infrared ray sensor that detects from the temperature detecting part of the infrared ray amount that is incorporated in the collecting article radiation in the storeroom; And surround temperature detecting part around and be equipped with the infrared ray optically focused parts that amount of radiation guided to the openings 50 of infrared ray sensor; Infrared ray optically focused parts possess the big characteristic of thermal conductivity ratio resin; Around the big infrared ray optically focused parts encirclement infrared ray sensor of pyroconductivity; Absorb the variations in temperature that interference effect around the infrared ray sensor (for example the food of switch door and heat etc.) causes with infrared ray optically focused parts; The temperature of infrared ray sensor and the infrared ray optically focused parts homogeneous that becomes like this; Variations in temperature around the infrared ray sensor reduces, and suppresses infrared ray sensor variations in temperature on every side, thereby can improve the detection accuracy of infrared ray sensor.

In addition, it also comprises: the recess that in heat insulation cutting part, forms; Take in the infrared ray mounting box of infrared ray sensor; On the part of infrared ray mounting box, connect and the optically focused peristome of formation according to the shape identical with the side of infrared ray optically focused parts; In recess, bury the infrared ray mounting box underground; Surround infrared ray optically focused parts side with the big resin portion of thermal capacity; Thereby can improve thermal capacity, and can reduce the variations in temperature of infrared ray optically focused parts, further improve the detection accuracy of infrared ray sensor.

The front end face of infrared ray optically focused parts is embedded in the face identical with the front end face of recess; The warm air that the switch door is caused flows into the front end face that only passes through infrared ray optically focused parts, and it is become does not have concavo-convex same plane, so; The trapping phenomena of the steam that distributes from this food when eliminating warm air that the switch door causes and flowing into and take in food etc.; When opening, variations in temperature is also little, therefore; Can suppress the erroneous detection that rising that the acute variation because of environment temperature causes and following degradation reason cause, improve the stability that detects accuracy.

Infrared ray optically focused parts are made up of the metal that with the good aluminium of heat conductivity is main component; Like this; Even because of switch door warm air flows into, uses with aluminium with good heat conductivity metal as main component, can accelerate hot response; Remove the thermograde of the openings 50 of infrared ray optically focused parts, improve the detection accuracy of infrared ray sensor.

Infrared ray optically focused parts are characterised in that; Hybrid resin and oxide powder, the oxide powder that mixes more than 85% makes it have electrical insulating property, like this; Can not reduce the detection accuracy of infrared ray sensor, can guarantee the electrical insulating property of the various relevant decree defined of household appliances.

In addition; Openings 50 has the height of front end face more than 3 millimeters apart from infrared ray sensor, and is for example, big if angle becomes; So; The temperature detection face that detects with infrared ray sensor also can increase, and detects the temperature beyond the face that is provided with probably, and the food that detects beyond the food is present on the temperature detection face.Like this, be made as 3 millimeters with the limits vision angle of coming up, dwindle the temperature detection face, thereby can suppress the erroneous detection of infrared ray sensor to greatest extent, further improve the stability that detects accuracy through height with openings 50.

Generally speaking, infrared ray sensor 112 is used for detecting the ultrared amount of radiation from object illumination, the steam that distributes because of the food from heat; With the dewfall on every side of infrared ray sensor 112, the heat energy that detects this dewfall (water) is as ultrared amount of radiation, therefore around the recess 113; Be the surface temperature that detects food; Finally detect the temperature attached to the dewfall (water) around the infrared ray sensor 112, existence can't correctly detect the such problem of food surface temperature, still; In this embodiment; Cover and the such intermediate member of collector lens are not set between infrared ray sensor and food, and spatial communication in infrared ray sensor surface and the storeroom so just can prevent to descend attached to the detection accuracy that causes infrared ray sensor on the intermediate member because of dew.

(embodiment 2)

Below, use accompanying drawing, embodiment of the present invention is carried out detailed explanation.

In embodiment 2; For with structure and the identical part of technological thought illustrated in embodiment 1; Omit its detailed explanation; For the structure that can use the technological thought identical, can realize through the technology contents of record in the combination embodiment 1 and the structure that structure forms with the content of record in embodiment 1.

Fig. 4 is the major part side cut away view of the freezer in the embodiment 2 of the present invention.

Generally speaking; The infrared ray sensor 13 that in the refrigerating chamber 3 as a storeroom in the freezer, is equipped with is made up of infrared element portion 43; Its built-in infrared ray amount of sending from object within the vision that detects converts thereof into the infrared ray light accepting part 40 of the signal of telecommunication then; Measure the fiducial temperature of the environment temperature of infrared ray light accepting part 40, convert thereof into the thermistor 42 of the signal of telecommunication.So, thrown under the situation beyond the field range at infrared ray sensor 13 at the high food of temperature, then can't detect.

In this embodiment, the detection accuracy when using infrared ray sensor 13 in order further to improve is provided in the first infrared ray sensor 13a of the place ahead configuration and many infrared ray sensors of the second infrared ray sensor 13b that dispose in the wings.

Cold gas exhausting outlet 21 in the cooling epimere container 27 also is provided with a plurality of, and it comprises: a main side is forwards discharged first cold gas exhausting outlet 21a of cold air and the second cold gas exhausting outlet 21b that a main side is rearward discharged cold air.

Like this; The first infrared ray sensor 13a can detect the temperature of the place ahead one side of the for example freezer in the epimere container 27 in the refrigerating chamber 3; The second infrared ray sensor 13b can detect the temperature of rear one side of epimere container 27; Therefore, through the detected temperatures of the more a plurality of infrared ray sensors of control device, judge the load to have dropped at which zone the needs coolings in then.

Throw under the situation of warm food at any place in epimere container 27; Concentrate the zone that infrared ray sensor disposed that detects maximum temperature in a plurality of infrared ray sensors 13 of cooling; Thereby effectively cool off, therefore, can change the air quantity of a plurality of outlets.

Specifically; For example, if the infrared ray sensor that detects maximum temperature in the infrared ray sensor 13 is the first infrared ray sensor 13a, so; The food of judging temperature is placed into the place ahead one side; The second cold gas exhausting outlet 21b is conditioned device and stops up, and discharges cold air from the first cold gas exhausting outlet 21a concentrated area, thereby can promptly cool off the food of the place ahead one regions that is placed into epimere container 27.

Through carrying out this rapid cooling, can prevent heat affecting because of the high food of temperature, the temperature that whole storeroom takes place rises; The temperature of the food of preserving in advance rises and causes the such situation of freshness decline; And the mode of the whole food of the storeroom that raises with comprehensive chilling temperature is compared, can the high food of the rapid chilling temperature in concentrated area; Therefore, can carry out energy-saving cooling.If especially, cool off such control automatically rapidly, so according to the detected temperatures of infrared ray sensor; Can cool off rapidly according to the load of necessity, therefore only to required place; Can further realize purpose of energy saving, carry out cooling preservation.

In addition; Under the situation of carrying out this rapid cooling; Of this embodiment, adopt the big parts of hot confining force to form bottom surface, like this as the epimere container 27 of the detection faces that disposes in infrared ray sensor 13 relative sides; Under situation about increasing, also can cool off more rapidly because of the big thermic load of food of putting into temperature.

In this embodiment, same with embodiment 1, dwindle the hot confining force of infrared ray optically focused parts of the detection range of infrared ray sensor through increase, so just can further improve the cooling rapidly efficiently that detects accuracy.

(embodiment 3)

Below, use accompanying drawing, embodiment of the present invention is carried out detailed explanation.

In embodiment 3; For with structure and the identical part of technological thought illustrated in embodiment 1 and embodiment 2; Omit its detailed explanation; For the structure that can use with the identical technological thought of content of record in embodiment 1 and embodiment 2, can realize making up technology contents and the structure of record in the embodiment 1 and the structure that forms.

Fig. 5 A is the major part side cut away view of the freezer in the embodiment 3 of the present invention.Fig. 5 B be the freezer in the embodiment 3 of the present invention refrigerating chamber get a bird's eye view plane.

Generally speaking; The infrared ray sensor 13 that in the refrigerating chamber 3 as a storeroom in the freezer, is equipped with is made up of infrared element portion 43; Its built-in infrared ray amount of sending from object within the vision that detects converts thereof into the infrared ray light accepting part 40 of the signal of telecommunication then; Measure the fiducial temperature of the environment temperature of infrared ray light accepting part 40, convert thereof into the thermistor 42 of the signal of telecommunication.So, be placed at the high food of temperature under the field range situation in addition of infrared ray sensor 13, then can't detect.

So in this embodiment, the infrared ray sensor 13 that use can yaw promptly, uses the infrared ray sensor 13c that can change detection range through mobile apparatus.

This infrared ray sensor 13c is with the detection faces of the infrared ray sensor 13c detection of storeroom; Promptly the center line 27a as the length direction of the bottom surface of the epimere container 27 of food putting surface is the center; Can whole infrared ray sensor 13c can be swung towards the mode of the width dimensions 27w swing of epimere container 27 according to infrared ray light accepting part 40 at least.

So the relation of the width dimensions 27w of the size 27x of the width of the field range of infrared ray sensor 13c and epimere container 27 is as follows.

27w/2≤27x≤27w

So, through the field range 27 of dwindling infrared ray sensor, can further improve the temperature detection accuracy when putting into food, can judge rightly more and which zone to have dropped into the load that needs cooling in, cool off then.

Throw under the situation of warm food at any place in epimere container 27; Concentrate the zone that infrared ray sensor disposed that detects maximum temperature in a plurality of infrared ray sensors 13 of cooling; Thereby effectively cool off, therefore, can change the air quantity of a plurality of outlets.

Specifically, for example, if the part that detects maximum temperature in the infrared ray sensor 13c field range be the place ahead one side (promptly; Door 23 1 sides); So, judge that the food of temperature is thrown in a side forwardly, the second cold gas exhausting outlet 21b is conditioned device and stops up; Discharge cold air from the first cold gas exhausting outlet 21a concentrated area, thereby can promptly cool off the food of being thrown in the place ahead of epimere container 27 one regions.

Through carrying out this rapid cooling, can prevent heat affecting because of the high food of temperature, the temperature that whole storeroom takes place rises; The temperature of the food of preserving in advance rises and causes the such situation of freshness decline; And the mode of the whole food of the storeroom that raises with comprehensive chilling temperature is compared, can the high food of the rapid chilling temperature in concentrated area; Therefore, can carry out energy-saving cooling.If especially, cool off such control automatically rapidly, so according to the detected temperatures of infrared ray sensor; Can cool off rapidly according to the load of necessity, therefore only to required place; Can further realize purpose of energy saving, carry out cooling preservation.

In this embodiment, a plurality of outlets are set, cold air is concentrated the big zone of load of flowing through, and cools off so rapidly; But even single outlet, outfit can change the wind direction variset of wind direction; Also can adjust wind direction, make cold airflow through the big zone of loading, in the case; A plurality of outlets 21 needn't be set, therefore, adopt simple more structure just can concentrate the cooling desired zone.

In this embodiment, the scope of the detection faces that is detected for the infrared ray sensor 13c that further enlarges storeroom can move whole infrared ray sensor 13c; But, because the purpose done like this is for the infrared detection face is moved, therefore; For example, form on the surface under the situation of optically focused parts such as cover, the peristome of these optically focused parts can be moved; In the case, the electric wiring etc. of infrared ray sensor itself is moved, the peristome of optically focused parts can be moved; Like this; Under low temperature environment, also can reduce the burden of electric wiring and movable part, the infrared ray sensor 13c that has been equipped with the higher movable part of reliability is set.

(embodiment 4)

Below, use accompanying drawing, embodiment of the present invention is carried out detailed explanation.

Fig. 6 is the major part side cut away view of the freezer in the embodiment 4 of the present invention.Fig. 7 is the side cut away view of the infrared ray sensor installation portion of the freezer in the embodiment 4 of the present invention.Fig. 8 is the enlarged drawing of side section A portion of the infrared ray sensor installation portion of the freezer in the embodiment 4 of the present invention.Fig. 9 be the freezer from embodiment 4 of the present invention the infrared ray sensor installation portion directly over the plane observed of B.

In embodiment 4; For with structure and the identical part of technological thought illustrated in embodiment 1 to embodiment 3; Omit its detailed explanation; For the structure that can use identical technological thought, can realize making up in embodiment 1 to the embodiment 3 technology contents and the structure of record and the structure that forms.

In Fig. 6 to Fig. 9; As the refrigerating chamber 3 of the part of the storeroom of the freezer main body 102 that constitutes by heat insulating box 101, be divided into different refrigerating chamber of temperature band 106 and vegetable compartment 107 by the heat insulation dividing body 105 in bottom of heat insulation dividing body 104 in the top of top and below.Be provided with the dividing body 108 of the right ends that connects this peristome at the peristome (not shown) of refrigerating chamber 103.

Generate the evaporimeter 110 that disposes generation cold air in the chamber 109 at the cold air that is set at refrigerating chamber 3 back sides; And respectively to refrigerating chamber 106, refrigerating chamber 103 and vegetable compartment 107 cool-air feeds and make the pressure fan 111 of its circulation, the defrosting heater 112 that when the lower space configuration defrosting of evaporimeter 110, is energized.In addition, be provided with cold air distributor chamber 119 at the back side of refrigerating chamber 103, and a plurality of cold gas exhausting outlets of linking to each other with cold air distributor chamber 119 of conduct, cold gas exhausting outlet 121, cold gas exhausting outlet 122 be provided with.

Peristome at refrigerating chamber 103 is provided with door 123 and door 124, is used for closing refrigerating chamber 103, so that cold air can not flow out from refrigerating chamber 103.Door 123 all is doors of drawing and pulling type with door 124, and when taking out and putting into food, they are to nearly body one side of freezer, and promptly the left direction of position shown in Fig. 6 is pulled out then and used.In addition, be respectively equipped with framework 125,126 at the rear of door 123 and door 124.On this framework 125,126, put epimere container 127 and hypomere container 128 respectively and put stage casing container 132 at the slidingtype on hypomere container 128 tops.

On the bottom surface and detection faces infrared ray sensor 113 relative one sides, put cool storage material 129 as epimere container 127.Generally speaking, to be configured to solidification point than frozen food low and than high subzero 15 ℃ of the temperature of refrigerating chamber 103 for the fusion temperature of this cool storage material 129.In addition, the loading of cool storage material 129 is configured in the amount of throwing on the cool storage material 129, also can not melt fully under the situation of fabricated food.

In addition, be provided with in the lower backside of refrigerating chamber 103 and be used for sucking cold air, it is guided to the cold air sucting inlet 130 of evaporimeter 110.

In addition, user's hand manually puts food 131 on cool storage material 129 and preserves.

Infrared ray sensor 113 generally is made up of infrared element portion 143, and its built-in infrared ray amount of sending from object within the vision that detects converts thereof into the infrared ray light accepting part 140 of the signal of telecommunication; And the fiducial temperature of measuring the environment temperature of infrared ray light accepting part 140, convert thereof into the thermistor 142 of the signal of telecommunication.

In this embodiment; Temperature to detect food 131 is a purpose; But infrared ray sensor 113 also detects the temperature of the article within the vision of infrared ray sensor 113 in the temperature that detects food 131; Therefore, detect the infrared ray amount of sending from the wall of refrigerating chamber 104 and food 131 and the cool storage material 129 etc. that are incorporated in the refrigerating chamber 104.At this moment, the environment temperature of measuring infrared ray light accepting part 140 is as fiducial temperature.

The metal wire 146 that is electrically connected with infrared element portion 143, connector 144 and the substrate 141 that is printed the distribution (not shown) are electrically connected, and the distribution 145 of the control substrate (not shown) of control freezer is electrically connected with connector 144.

Infrared element portion 143 is to the voltage of the infrared ray amount of the voltage of the fiducial temperature of control substrate (not shown) output thermistor 142 and infrared ray light accepting part 140; Thereby calculate the temperature of the mensuration thing that is detected, in the control device (not shown), judge according to the detected temperatures of calculating.

Infrared ray optically focused parts 148 according to the state of infrared element portion 143 thermo-contacts under cover infrared element portion 143 around; And and there is not the mode in slit to be provided with between the substrate 145; In order to reject the scattering infrared ray that sends from food 131 and cool storage material 129 article in addition; Improve detected intensity, the openings 50 of θ ° of limits vision angle is set, to guide to infrared ray light accepting part 140.Like this, owing to have light-focusing function, in this embodiment, the top ends 150b of the openings of infrared ray optically focused parts 148 is more than 3 millimeters to the height of the rearward end 150c of openings, and like this, field-of-view angle just becomes 30 °～60 °., be approximately at the height of epimere container 127 under 110 millimeters the situation, field-of-view angle preferably is approximately 50 ° here.

Here, openings 50 is inner at the circle of detection range, and the infrared detection intensity at center is the strongest, toward the end detected intensity more a little less than.Therefore, through further dwindling the field-of-view angle of infrared ray sensor, thereby the intensity of the infrared ray amount that detects thing can be improved, the temperature of object can be accurately detected more conscientiously.But, because the top ends face of the part of field-of-view angle and openings 150 is overlapping, therefore, receive the top ends Influence of Temperature, become the main cause of erroneous detection.Like this; Internal face 150a for the openings at least of the infrared ray optically focused parts 148 within the vision that are positioned at infrared ray sensor; Preferably make it for example because of opening under the situation that the interference that flows into warm air at closing time causes variations in temperature; Also can relax temperature tracing property, carry out stable detection for this interference.In this embodiment,,, increase thermal capacity so that the hot confining forces of infrared ray optically focused parts 148 itself increase through improving heat conductivity for the hot confining force of the internal face 150a of the openings that increases infrared ray optically focused parts 148.

So; In order to improve heat conductivity; Increase thermal capacity; Thereby the hot confining force of infrared ray optically focused parts 148 is increased, adopt and compare the high material of heat conductivity as the common ABS resin of traditional optically focused parts, for example metals such as aluminium, titanium, stainless steel, iron, copper or the material that comprises these metals form.Particularly high from light weight, pyroconductivity and thermal capacity, the viewpoint of configuration is exposed on part surface in the refrigerating chamber 3, preferably with the high aluminium of corrosion resistance as main component.

In addition, expose and under the situation about using the maloperation of the infrared ray sensor 113 that static generation causes and the damage of element itself in the refrigerating chamber 103 for the friction of generation such as rag that prevent to wait in user's cleaning box and human body are charged on a part of surface; In the powder metal-resin, adopt to have electrical insulating property, the oxide powder that pyroconductivity and thermal capacity are high; For example use with in aluminium oxide and silica, the magnesia any one as main component; The material of dispersing and mixing in PPS, ABS, LSP resins such as (liquid crystal polymers), thus hot confining force also can be improved, in the case; It possesses high heat conductivity and electrical insulating property; For its mixed proportion, according to the weight rate oxide powder preferably more than 80%, for electrical insulating property; According to the resistivity identical with common resin component is more than 1.0 * 1014 Ω m, also can satisfy the electrical insulating property of the various decree defineds of household appliances.

In addition; Using infrared ray sensor 113 to detect under the situation of temperature of the collecting article of in storeroom, taking in,, be easy to generate the thermograde of internal face rearward end 150c of internal face top ends 150b and openings of the openings of infrared ray optically focused parts 148 because of the variations in temperature that the switch door causes; Therefore; The part by weight of oxide powder is greatly about more than 85%, so pyroconductivity improves; Pyroconductivity is preferably more than the 2W/mK, and the thermal capacity of unit mass is preferably more than 750J/kg ℃.

In addition; In this embodiment, in order further to improve the hot confining force of infrared ray optically focused parts 148, around the optically focused peristome 151 encirclement infrared ray optically focused parts 148 of infrared ray mounting box 147; Thereby raising thermal capacity further reduces the variations in temperature of infrared ray optically focused parts 148.

In the case; Infrared ray mounting box 147 has the function as the heat insulating member on every side that surrounds infrared ray optically focused parts 148; The outer surface that can prevent infrared ray optically focused parts 148 is exposed in the outside air, therefore, reduces the contact area of infrared ray optically focused parts 148 and outside air; And slow down the variations in temperature of the infrared ray optically focused parts of uniform temperature, thereby can further relax tracing property for the variations in temperature that causes because of external interference.

Below; For infrared ray mounting box 147; Connect the optically focused peristome 151 that forms in the part setting that roughly is positioned at the center according to the shape identical, side-prominent a plurality of juts 152 in the case are being set around this optically focused peristome 151 with the side of infrared ray optically focused parts 148.According to infrared ray mounting box 147 being set with the recess 149 chimeric modes that form in the heat insulation part that roughly is positioned at the center of cutting apart plate 104 of epimere.

Have in the interior round side of jut 152 and to be communicated with the openings 150 of infrared ray optically focused parts 148 and the projection peristome 152a of opening.It is bigger that this projection peristome 152a and openings 150 are compared aperture area.

Here, for example, if with around the protuberance formation optically focused peristome 151 cylindraceous that is surrounded by side-prominent wall in case; So, in infrared ray optically focused parts 148 and protuberance, will produce step, take place easily in the space, inside (inboard) of protuberance 152 cylindraceous because of switch door 123 and the inflow of door 124 warm airs; And because of taking in food 131, the warm air of the steam that distributes from food 131 is detained, because of warm air is detained; Produce the front end face of infrared ray optically focused parts 148 and the thermograde of terminal surface; Become the main cause of the detection error of infrared ray sensor 113, still, in the present invention; In order to prevent this situation; According to having slit h3 a plurality of protuberances 152 are set, make its ectocine that is not easy to take place the environment temperature because of infrared ray sensor 113 and changes (for example, the food of switch door and heat etc.) and the warm airs of protuberance 152 peripheries that cause are detained.That is, a plurality of protuberances 152 are also discontinuous, but according to respectively independently mode be configured in the infrared ray mounting box 147.

So; In this embodiment, protuberance 52 forms the shape that wind flows easily, has the slit h3 between the adjacent jut 152 and clip the relative side of projection peristome 152a gap h3 ' is set; Thereby reduce the resistance of wind, make it become the shape that wind flows more easily.

In this embodiment, as shown in Figure 9, adjacent jut 152 has 90 ° angle, disposes 4 places according to the mode of the infrared element 143 that surrounds infrared ray sensor 113, and forms the shape that wind fully flows.In addition, as shown in Figure 9, two places in 4 place's juts 152 are according to becoming the mode of level to be provided with the fore-and-aft direction X of freezer.And all the other 2 places are according to becoming the mode of level to be provided with the left and right directions of the freezer of the fore-and-aft direction X quadrature of freezer.When cold air when the fore-and-aft direction X of freezer flows through the gap of outside diameter d 2 of diameter d 1 and infrared ray optically focused parts 148 of projection peristome 152a; For example; With according to becoming 30 ° to compare with the situation that 45 ° mode is provided with X or Y, the wind path resistance minimizing in the gap of the outside diameter d 2 of the diameter d 1 of projection peristome 152a and infrared ray optically focused parts 148.

That is, jut 152 but is provided with a plurality ofly on as the diameter d 1 of the projection peristome 152a of the inner space of jut 152 and discontinuous discontinuously, so just can further reduce the wind path resistance.And jut 152 is positioned on the diameter d 1 as the projection peristome 152a of the inner space of jut 152 according to the mode of a contact.Specifically, only be positioned on the diameter d 1 of projection peristome 152a as the top ends of the jut 152 of semicircle radius.And, the most inboard diameter d 3 of the rectilinear profiles of the jut 152 that is communicated with for semi-circular portions with the jut top too, in this embodiment, jut 152 account for rectilinear profiles the most inboard diameter d 3 about 1/4.

As the front end face 148a of the outside 147a of refrigerating chamber one side of the wall 104a of refrigerating chamber 103 sides of the heat insulation storeroom of cutting apart plate 104 of the epimere beyond the recess 149, infrared ray mounting box, infrared ray optically focused parts according to roughly conplane shape setting; To reduce step; Like this; On off state regardless of door 123, door 124; Wind all can be easily flows along the heat insulation plate 104 of cutting apart of the epimere of the end face of refrigerating chamber 103, is difficult to the front end face of infrared ray optically focused parts 148 and the thermograde of terminal surface occur because of warm air is detained.

So; The front end face 148a of outside 147a and infrared ray optically focused of refrigerating chamber one side of infrared ray mounting box that has formed jut 152 is according to conplane shape setting; Promptly; The part that is equivalent to not exist the gap h3 between the jut 152 of jut 152 according to the conplane shape setting of the front end face 148a of infrared ray light collecting part, so, form distinguished and admirable through the time the shape that resistance is few and warm air is difficult to be detained.

In the case, at the end face of the storeroom that infrared ray sensor 113 is installed, only jut 152 is outstanding from the wall of end face.

Through jut 152 is set; Towel directly contacts infrared ray sensor 113 in the time of can preventing to clean; And can prevent fricative static because of towel; And human body with the maloperation and the fault of the infrared ray sensor 113 that causes of sparking of static, the perhaps damage of the infrared element 143 of infrared ray sensor 113.

Particularly in this embodiment; Jut 152 is the parts that form separately with infrared ray optically focused parts 148; Like this, because infrared ray sensor 113 is near storeroom one side, the jut 152 that the user might run into can directly not contact infrared ray sensor 113; But across infrared ray optically focused parts 148 configuration juts 152 and infrared ray sensor 113; Thereby the static that can prevent user's contact protrusion portion 152 and produce, and human body with the maloperation and the fault of the infrared ray sensor 113 that causes of sparking of static, the perhaps damage of the infrared element 143 of infrared ray sensor 113.

As stated; In order further to relax infrared ray optically focused parts 148 tracing properties for the variations in temperature that causes because of external interference; In this embodiment, the well-designed shape that is positioned at the protuberance within the vision 152 of infrared ray sensor 113 makes it be difficult to take place the warm air delay of protuberance 152 peripheries; Therefore, can further improve the detection accuracy of infrared ray sensor 113.

In addition; Jut 152 is the parts that form separately with infrared ray optically focused parts 148, so just can adopt other material, and jut 152 preferably adopts heat conductivity to form than infrared ray optically focused parts 148 low materials; Like this; The heat that just can prevent jut 152 is conducted heat to infrared ray optically focused parts 148, and the temperature of infrared ray optically focused parts 148 becomes more stable, thereby can improve the detection accuracy of infrared ray sensor 113.

In addition, general human body with electric weight surpass 1000V sometimes, certain space length h2 is set at more than 6 millimeters; Even owing to be that the user wants to contact the shape that infrared ray sensor 113 fingers can not get into, user's security is higher, the field-of-view angle of infrared ray sensor 113 not with the overlapping scope of jut 152 in; Preferably space length h2 is set at 6 millimeters, is set in 6 millimeters of the Φ, like this except can preventing that finger from getting into from vertical direction as the diameter d 1 of the projection peristome 152a of jut 152 internal diameters; And; The size of gap h3 between the adjacent jut 152 is set at below 4 millimeters, like this, can prevents that finger from inserting from the side; Aspect reality use freezer, can guarantee enough insulation distances.

And, project to the surface of infrared ray mounting box 147 from the projection peristome 152a of the circle that is positioned at jut 152 towards side surface direction, be the crosswise setting and do not have the right angle part; But, prevent that when cleaning waits towel etc. tangles, and be incorporated in food 131 in the storeroom etc. and hang on the jut 152 by the inclined plane part 153 that curve forms; Cause food 131 to scratch; And directly contact protrusion portion 152 and the breakage that produces etc., and, through inclined plane part 153 is set; On off state regardless of door 123, door 124; Wind is easy to through the heat insulation plate 104 of cutting apart of the epimere of refrigerating chamber 103 end faces, and the inclined plane part 153 of flowing through is difficult to produce the front end face of infrared ray optically focused parts 148 and the thermograde of terminal surface because of the delay of warm air more.So the inclined plane part of the outer surface of jut 152 forms does not have the shape of right angle portion, but is formed by curve, thereby forms the few shape in place that tangles.

Below, operation, the effect of adopting the freezer that constitutes with upper type described.

At first, after the energized, the running of beginning freeze cycle (not shown), the cold-producing medium evaporimeter 110 of flowing through generates cold air then.The Quilt with air conditioning pressure fan 111 that is generated is sent to cold air distributor chamber 119, is assigned with then from cold gas exhausting outlet 121 and cold gas exhausting outlet 122 and in refrigerating chamber 103, discharges.

Refrigerating chamber 103 is discharged to the temperature that refrigerating chamber 103 interior cold air are cooled to regulation, and simultaneously, cool storage material 129 also is cooled.At this moment, refrigerating chamber 103 is adjusted to the temperature that can food product refrigeration be preserved certain hour, for example subzero 20 ℃; But, because cool storage material 129 uses solution temperature to be set in subzero 15 ℃ material, therefore; After refrigerating chamber 103 is cooled off fully and is passed through certain hour; Cool storage material 129 becomes the state that freezes fully, and the cold air in the cooling refrigerating chamber 103 gets into cold air from cold air sucting inlet 130 and generates chamber 109, is evaporated device 110 coolings once more.

For example; When the environment temperature as the infrared ray sensor 113 of fiducial temperature is 25 ℃, suppose that from the voltage of infrared ray sensor 113 outputs be V, infrared ray light accepting part 140 environment temperatures of in thermistor 142, measuring are S; In measurement range, in infrared ray light accepting part 140, measure the infrared ray amount; The mean temperature of infrared ray amount is B, and so, the temperature detection of infrared ray sensor 113 is represented with relational expression " V=α (B4-S4) ".The α here is a coefficient.

Therefore, if there is not the temperature difference of the mean temperature B of environment temperature S and infrared ray amount, so; The numerical value of the voltage V that infrared ray sensor 113 is exported is near 0; Fiducial temperature is the temperature S of measurement range, if the temperature difference is big, so; The infrared ray amount that in infrared ray light accepting part 140, detects will increase, and the voltage of being exported also can increase.

So; Under the situation of the food of throwing in temperature; Under the situation that the environment temperature S as the infrared ray sensor 113 of fiducial temperature also increases thereupon, the temperature difference of environment temperature S and mean temperature B diminishes, even the absolute temperature of the food of temperature height; Also can't detect and throw in the high relatively food of temperature, the detection accuracy of infrared ray sensor 113 will descend.

Then, door 123 when closing the detected temperatures of infrared ray sensor 113 comprise the surface temperature of the cool storage material 129 that disposes on the bottom surface as the epimere container 27 of the detection faces that is equipped with in a relative side with infrared ray sensor 113.Like this, adopt cool storage material 129 to form the face that infrared ray sensor 113 is detected, like this with cool storage function; For example, under the situation that receives external interference such as warm air inflow, the hot confining force of the detection faces of infrared ray sensor also can increase; Can alleviate temperature tracing property, therefore, not be vulnerable to the influence of temperature variation that external interference causes for external interference; Stable temperature can be kept, therefore, higher detection accuracy can be obtained.

So; In this embodiment; For as the internal face 150a of the openings of the infrared ray optically focused parts 148 within the vision that are positioned at infrared ray sensor 113 with as the bottom surface of the epimere container 27 of the detection faces that is equipped with in a relative side, all adopt the big parts of hot confining force to form, like this with infrared ray sensor 113; Taking place because of external interference under the situation of temporary transient variations in temperature; Also can relax the temperature tracing property of the part within the vision that is positioned at infrared ray sensor, therefore, infrared ray sensor 113 can detect the temperature as the food 131 of temperature detection object more exactly.

And; Have in interior circle one side of the jut 152 of storeroom one side that is configured in infrared ray optically focused parts 148 and to be communicated with the openings 150 of infrared ray optically focused parts 148 and the projection peristome 152a of opening, the open area ratio openings 150 of this projection peristome 152a is big, like this; Further dwindle the jut 152 of the field range that is positioned at infrared ray sensor 113; The detection accuracy that prevents infrared ray sensor 113 from detecting the temperature of jut 152 and cause descends, and, adopt to be difficult to take place the shape that jut 152 peripheral warm airs are detained; The detection accuracy that further keeps infrared ray sensor 113; Simultaneously, infrared ray sensor breaks down when preventing that the user from contacting and when static takes place, and has been equipped with the freezer with the higher infrared ray sensor of reliability thereby can provide.

In this embodiment, jut 152 becomes the mode of level to be provided with according to 2 places in 4 place's juts 152 with the fore-and-aft direction X (fore-and-aft direction X is the wind path direction of cold airflow warp) of freezer.And all the other 2 places are according to becoming the mode of level to be provided with the left and right directions Y of the freezer of the fore-and-aft direction X quadrature of freezer.When cold air when the fore-and-aft direction X of freezer flows through the gap of outside diameter d 2 of diameter d 1 and infrared ray optically focused parts 148 of projection peristome 152a; For example; With according to becoming 30 ° to compare with the situation that 45 ° mode is provided with X or Y, the wind path resistance minimizing in the gap of the outside diameter d 2 of the diameter d 1 of projection peristome 152a and infrared ray optically focused parts 148.

This be because; As this embodiment; In fact the inventor is provided with the parts that have been equipped with 4 place's juts so that different angle is real, experimentize then when measuring the temperature of infrared ray optically focused parts 148, and be that the minimum structure of variations in temperature of infrared ray optically focused parts 148 draws according to this structure.

In this embodiment; On diameter d 1 as the projection peristome 152a of the inner space of jut 152; Jut adopts the structure that roughly contacts, and specifically, only the top ends as the jut 152 of semicircle radius is positioned on the diameter d 1 of projection peristome 152a.And, the most inboard diameter d 3 of the rectilinear profiles of the jut 152 that is communicated with for the semi-circular portions on the top of jut too, in this embodiment, jut 152 account for rectilinear profiles the most inboard diameter d 3 about 1/4.In addition, in this embodiment, this jut 152 account for rectilinear profiles the most inboard diameter d 3 about 1/4; But, according to experiment, if below 1/3; So; Just be difficult to take place warm air and be detained, therefore, jut 152 preferably accounts for the most inboard below at least 1/3 of diameter d 3 of rectilinear profiles sometimes.

When the user took in food 131, for example, door 123 was drawn out, and at this moment, the temperature detection of infrared ray sensor 113 detects the temperature in the hypomere container 128.Then, door 123 becomes the state of opening, and extraneous warm air flows into from the opening surface of door 123; The heat insulation plate 104 of cutting apart of epimere of the end face through refrigerating chamber 103, warm air flows through along inclined plane part 152, and the front end face of the outer surface of infrared ray mounting box 147 and infrared ray light collecting part 148 forms same flat shape; Therefore, under the situation of opening door, the wind inclined plane part 153 of also can flowing through; Therefore, can suppress because of warm air is detained, variations in temperature is little; The acute variation of environment temperature and erroneous detection that the rising that causes and following degradation reason cause, and can improve the stability of the detection accuracy of infrared ray sensor 113.

In addition; Under the situation in cleaning refrigerating chamber 103 casees such as grade, because of static is with in the friction of towel etc., if because of with static different with season; Air dried period static be trapped in easily under the state in the human body; Contact infrared ray sensor 113 so, will spark from the top of finger tip and towel.When this discharge energy was had an effect, noise mistake got in the infrared element 143, because of maloperation and the infrared element 143 of infrared ray sensor 113 itself can't bear electrostatic pressure, the broken string and the short circuit of infrared element 143 inside took place.

Therefore; Make with the front end face of infrared ray sensor 113 inboardly towards freezer around conplane optically focused peristome 151, the outstanding a plurality of juts 152 of a part are set, thereby guarantee certain space length; Prevent the maloperation and the fault of the infrared ray sensor 113 that static causes; The perhaps damage of infrared ray sensor 113 simultaneously, can prevent that finger from getting into directly contact electric component (infrared element 143).

As stated, in this embodiment 4, be equipped with: the heat insulating box that constitutes by a plurality of thermal insulation areas; The heat insulation cutting part that heat insulating box is cut apart; Cut apart the storeroom that forms by heat insulation cutting part; The recess that in heat insulation cutting part, forms; Detect from the infrared ray sensor of the amount of radiation that is incorporated in the collecting article radiation in the storeroom; Around the encirclement infrared ray sensor, and be equipped with the infrared ray optically focused parts that amount of radiation guided to the openings of infrared ray sensor; Take in the infrared ray mounting box of infrared ray sensor; And on the infrared ray mounting box, connect the optically focused peristome that forms according to the shape identical with the side of infrared ray optically focused parts; In recess, bury the infrared ray mounting box underground; Towards storeroom one side a plurality of outstanding juts are set around the optically focused peristome; So just can prevent the maloperation and the fault of the infrared ray sensor that causes of frictional static because of in the cleaning storeroom time, the perhaps damage of infrared ray sensor element itself.

In addition; Periphery at peristome is provided with a plurality of juts; So can reduce the warm air delay of the jut periphery that influence (for example, the food of switch door and heat etc.) that the environment temperature because of infrared ray sensor changes causes, the detection accuracy of raising infrared ray sensor.

In addition, the distance of jut that front end face to the infrared ray mounting box of infrared ray sensor is set is the height more than 6 millimeters, guarantees various relevant decree defined and insulation distance electric component (infrared ray sensor) of household appliances like this; Simultaneously; General human body with voltage surpass 1000V sometimes, through guaranteeing certain space length, like this; From human body with static spark; Under the situation that this discharge energy is had an effect, also can further prevent the maloperation and the fault of infrared ray sensor, the perhaps damage of infrared ray sensor itself.

In addition, will around the optically focused peristome, be set at Φ below 6 millimeters by the internal diameter of a plurality of outstanding juts, and so just can prevent to point from the inboard vertical direction of jut and get into and directly contact with electric component (infrared ray sensor).

According to the equal spacing setting, being spaced apart below 4 millimeters of thrust so just can prevent to point from the inboard side surface direction of jut and get into and directly contact with electric component (infrared ray sensor) jut around peristome.

The outside from jut towards the optically focused peristome is arranged on the surperficial formed inclined plane part of infrared ray mounting box, guarantees that security prevents to tangle damage that the position causes etc. because of jut; Simultaneously; Along inclined plane part, convection current is guided to the infrared ray sensor front end face, thereby the warm air that suppresses the infrared ray sensor periphery is detained; Reduce and the thermograde of infrared ray sensor, thereby can further improve the detection accuracy of infrared ray sensor.

The outer surface of storeroom one side of the front end face of infrared ray optically focused parts and infrared ray mounting box roughly at grade; Thereby eliminate the step of infrared ray mounting box and infrared ray optically focused parts, and eliminate and open the inflow of warm air at closing time, and the warm air delay of the steam that distributes from this food when taking in food etc.; Like this; Under the situation of opening door, variations in temperature is also little, therefore; Can suppress the erroneous detection that rising that the acute variation because of environment temperature causes and following degradation reason cause, improve the stability that detects accuracy.

In this embodiment; Epimere beyond the recess 149 is heat insulation cut apart plate 104 as the outside 147a of refrigerating chamber one side of the wall 104a of refrigerating chamber 3 sides of storeroom and infrared ray mounting box according to roughly conplane shape setting; But the outer surface 147a of refrigerating chamber one side of infrared ray mounting box compares more side-prominent to storeroom one with the wall 104a of refrigerating chamber 103 sides, so; 104a compares with wall; The outer surface 147a of refrigerating chamber one side of infrared ray mounting box forms convex, like this, and regardless of the on off state of door 123, door 124; Can both prevent further that warm air is trapped in the protuberance periphery of infrared ray mounting box 147, is difficult to produce the front end face of infrared ray optically focused parts 148 and the thermograde of terminal surface.In the case; Can form convex near having only the installed surface 147b that has disposed jut 152 at least; The outside 147a of refrigerating chamber one side of wall 104a and infrared ray mounting box at grade, only installed surface 147b is outstanding smoothly, in the case; The rigidity of installed surface 147 periphery of protuberance 152 can be further improved, and the freezer of the non-contact sensor of the higher protuberance of quality 152 can be realized having.

Industrial applicibility

As stated, the influence of the interference of the infrared ray sensor of freezer of the present invention around can not receiving (for example the food of switch door and heat cause variations in temperature) can improve the detection accuracy; And; Guarantee the electrical insulating property of the various relevant decree defined of household appliances, improve the quality of products, simultaneously; Not only home-use freezer also can be applied in commercial freezer and influences on every side in the determining instrument under the big environment.

In addition, for freezer of the present invention, on the part of the infrared ray mounting box that infrared ray sensor is installed, form jut and inclined plane part; And with infrared element portion certain space length is arranged, thereby prevent the erroneous detection and the fault of the infrared ray sensor that static causes, the perhaps internal damage of the infrared element of infrared ray sensor; Can not receive interference effect around the jut (for example the food of switch door and heat cause variations in temperature); Improve to detect accuracy, and, guarantee the electrical insulating property of the various relevant decree defined of household appliances; Improve the quality of products; Simultaneously, not only home-use freezer also can be applied in commercial freezer and influences on every side in determining instrument under the big environment etc.

Claims (5)

1. freezer is characterized in that:

Comprise:

The heat insulating box that constitutes by a plurality of thermal insulation areas;

The heat insulation cutting part of cutting apart said heat insulating box;

The storeroom of being cut apart by said cutting part;

The infrared ray sensor of temperature detecting part with infrared ray amount of the collecting article radiation of detection from be incorporated in said storeroom; With

At the infrared ray optically focused parts of comparing with said infrared ray sensor more near the inboard position configuration of said storeroom,

In said infrared ray optically focused parts, be provided with the openings of the field-of-view angle of the said infrared ray sensor of restriction,

The internal face of the said at least openings of said infrared ray optically focused parts forms according to the mode that hot confining force increases,

Said freezer also comprises the infrared ray mounting box of taking in said infrared ray sensor, and on the part of said infrared ray mounting box, connects the optically focused peristome that forms according to the shape identical with the side of said infrared ray optically focused parts,

Bury said infrared ray mounting box in the recess that on said heat insulation cutting part, forms underground.

2. freezer as claimed in claim 1 is characterized in that, the top ends of the said openings of said infrared ray optically focused parts and the front end face of said recess are on same plane.

3. freezer as claimed in claim 1 is characterized in that, said infrared ray optically focused parts are made up of the metal that with aluminium is main component.

4. freezer as claimed in claim 1 is characterized in that, said infrared ray optically focused parts hybrid resin and oxide powder, and have the electrical insulating property that mixes the said oxide powder more than 85% and constitute.

5. freezer as claimed in claim 1 is characterized in that, set openings in said infrared ray optically focused parts, and the height of the rearward end of the top ends of said openings to said openings is the height more than 3 millimeters.

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