TW201818035A - Refrigerator capable of suppressing temperature rise in the storage compartment due to the defrosting operation - Google Patents

Refrigerator capable of suppressing temperature rise in the storage compartment due to the defrosting operation Download PDF

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Publication number
TW201818035A
TW201818035A TW105136370A TW105136370A TW201818035A TW 201818035 A TW201818035 A TW 201818035A TW 105136370 A TW105136370 A TW 105136370A TW 105136370 A TW105136370 A TW 105136370A TW 201818035 A TW201818035 A TW 201818035A
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cooler
capacity
heater
value
frost
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TW105136370A
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Chinese (zh)
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TWI642884B (en
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仲島孔明
田代雄亮
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三菱電機股份有限公司
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Abstract

A refrigerator performs the following operations: a first defrosting operation for using a heater to heat a cooler in a first frosting state in which the cooler has a large amount of frost; and a second defrosting operation for using the heater to heat the cooler in the second frosting state in which the cooler has a small amount of frost, wherein a second capacity, which serves as the heating capacity of the heater during the second defrosting operation, is lower than the first capacity, which serves as the heating capacity of the heater during the first defrosting operation. The refrigerator includes: a storage compartment; an air passage in communication with the storage compartment; a cooler disposed on the air passage to cool down the air flowing in the air passage; a heater for heating the cooler to enable the heating capacity to be the first capacity in the first frosting state in which frost is formed on the cooler and to enable the heating capacity to be the second capacity in the second frosting state in which frost is formed on the cooler, respectively; and a first temperature sensor, which detects the temperature of the cooler. When the first temperature sensor detects a value greater than a fourth determination value, the heater heats the cooler with the second capacity. When the first temperature sensor detects a value smaller than the fourth determination value, the heater heats the cooler with the first capacity. The second capacity is smaller than the first capacity.

Description

冰箱    Refrigerator   

本發明係關於冰箱，尤其是關於除去附著在冷卻器的霜的技術。 The present invention relates to a refrigerator, and more particularly to a technology for removing frost attached to a cooler.

冰箱具備貯藏室、與該貯藏室連通的風路、及設置於該風路的冷卻器等。而且，冰箱，藉由冷卻器將從貯藏室流入風路的空氣冷卻，再使已冷卻的空氣流回貯藏室，藉此以冷卻貯藏室內的食品等。在此，為了放入或取出食品等而將貯藏室的門片開閉時，冰箱外部的潮濕空氣流入該貯藏室內。另外，存放在貯藏室的食品等也會產生水蒸氣。因此，隨著冰箱的運轉持續進行，從貯藏室回流之空氣中所含有的水蒸氣變成霜，附著在冷卻器上。 The refrigerator includes a storage room, an air passage communicating with the storage room, a cooler provided in the air passage, and the like. In addition, the refrigerator cools the air flowing from the storage room into the air path with a cooler, and then returns the cooled air to the storage room, thereby cooling foods and the like in the storage room. Here, when the door of the storage room is opened or closed for putting in or taking out food, etc., the humid air outside the refrigerator flows into the storage room. In addition, food stored in a storage room may generate water vapor. Therefore, as the operation of the refrigerator continues, water vapor contained in the air returning from the storage compartment becomes frost and adheres to the cooler.

因此，過去已提出一種冰箱，其具有加熱冷卻器的加熱器，用該加熱器加熱冷卻器，以進行冷卻器的除霜運轉。例如，專利文獻1中揭露一種冰箱，其在企圖要減少耗電量的前提下進行除霜運轉，其係將2系統的溫度檢出元件安裝於冷卻器，並由其溫度差判斷實際的結霜狀態，以控制前次的除霜運轉到本次的除霜運轉之間的除霜間隔。 Therefore, a refrigerator has been proposed in the past which has a heater for heating a cooler, and the heater is used to heat the cooler to perform a defrosting operation of the cooler. For example, Patent Document 1 discloses a refrigerator that performs a defrosting operation on the premise that an attempt is made to reduce power consumption. The refrigerator is equipped with a temperature detection element of 2 systems on a cooler, and the actual difference is judged from the temperature difference. Defrost state to control the defrost interval between the previous defrost operation and the current defrost operation.

先行技術文獻 Advance technical literature

【專利文獻】專利文獻1：特開2001-215077號公報 [Patent Document] Patent Document 1: JP 2001-215077

專利文獻1中記載的冰箱，在進行除霜運轉時，不論冷卻器的結霜量的多寡，都使得加熱器的加熱容量[W](換言之，耗電量)為固定。因此，專利文獻1中記載的冰箱有如後述的課題。 In the refrigerator described in Patent Document 1, during the defrosting operation, the heating capacity [W] (in other words, power consumption) of the heater is fixed regardless of the amount of frosting of the cooler. Therefore, the refrigerator described in Patent Document 1 has problems as described below.

冷卻器首先從從貯藏室回流之含有水蒸氣的空氣接觸到該冷卻器的空氣流入口(換言之，冷卻器內的空氣流的上游側)開始結霜。之後，冷卻器的結霜範圍，從空氣流入口開始向著空氣排出口的方向擴張。而且，最後，冷卻器全體都會結霜。亦即，在冷卻器的結霜量少的階段中，係為冷卻器的空氣排出口側的結霜量少於冷卻器的空氣流入口側的結霜量的狀態。因此，在不論結霜量多寡都使加熱器的加熱容量為一定的專利文獻1所記載的冰箱中，欲將結霜量少的階段之冷卻器除霜的時候，加熱器的加熱容量相對於冷卻器的結霜量而言是過大的，當冷卻器的空氣流入口側的除霜結束時，使得已經完成除霜的冷卻器的空氣排出口側之溫度過度地上升。因此，專利文獻1所記載的冰箱，具有後述課題：當其完成結霜量少的階段之冷卻器的除霜後，恢復為通常運轉的時候，供給至貯藏室的空氣在冷卻器的空氣排出口側被加熱，而使得貯藏室內的溫度上升。另外，專利文獻1所記載的冰箱還有後述課題：為了要把溫度已經上升的貯藏室內的空氣再度冷卻，而必須要耗費電力，使得耗電量增加。 The cooler first starts to frost when the water vapor-containing air flowing back from the storage compartment contacts the air flow inlet of the cooler (in other words, the upstream side of the air flow in the cooler). After that, the frosting range of the cooler expands from the air inlet to the air outlet. And, finally, the entire cooler will frost. In other words, in the stage where the amount of frost on the cooler is small, the amount of frost on the air discharge port side of the cooler is less than the amount of frost on the air flow inlet side of the cooler. Therefore, in the refrigerator described in Patent Document 1 in which the heating capacity of the heater is constant regardless of the amount of frosting, when the defrosting of the cooler at a stage where the amount of frosting is small, the heating capacity of the heater is relative to The amount of frost on the cooler is too large. When the defrosting on the air flow inlet side of the cooler is completed, the temperature on the air exhaust port side of the cooler that has completed the defrosting is excessively increased. Therefore, the refrigerator described in Patent Document 1 has a problem to be described later: when the defrosting of the cooler at the stage where the amount of frost formation is small is restored and the normal operation is resumed, the air supplied to the storage compartment is discharged from the cooler's air. The outlet side is heated, so that the temperature in the storage chamber rises. In addition, the refrigerator described in Patent Document 1 has a problem described later: in order to cool the air in the storage room whose temperature has risen again, it is necessary to consume electric power to increase the power consumption.

為了解決上記課題，想出將加熱器的加熱容量變 小的做法。但是，像這樣使加熱器的加熱容量變小的話，在不論結霜量多寡都使加熱器的加熱容量為一定的專利文獻1所記載的冰箱中，欲將結霜量多的冷卻器除霜時，會拉長除霜時間。亦即，在長時間中，無法將已冷卻的空氣供給至貯藏室。因此，專利文獻1所記載的冰箱中，即使把加熱器的加熱容量變小，仍是會有貯藏室內的溫度上升的課題。另外，專利文獻1所記載的冰箱，具有後述課題：為了要把溫度已經上升的貯藏室內的空氣再度冷卻，而必須要耗費電力，使得耗電量增加。 In order to solve the above problem, a method of reducing the heating capacity of the heater has been thought of. However, if the heating capacity of the heater is reduced as described above, in a refrigerator described in Patent Document 1 in which the heating capacity of the heater is constant regardless of the amount of frost formation, it is desired to defrost a cooler with a large amount of frost formation. It will increase the defrost time. That is, the cooled air cannot be supplied to the storage room for a long time. Therefore, in the refrigerator described in Patent Document 1, even if the heating capacity of the heater is reduced, there is a problem that the temperature in the storage room rises. In addition, the refrigerator described in Patent Document 1 has a problem to be described later: in order to cool the air in the storage room whose temperature has risen again, it is necessary to consume electric power to increase the power consumption.

本發明，為了解決如上述的課題，其目的在於提供一種冰箱，能夠較以往更能控制因為除霜運轉而造成貯藏室內的溫度上升的情況。 In order to solve the problems as described above, the present invention aims to provide a refrigerator capable of controlling a temperature rise in a storage room due to a defrosting operation more than ever.

本發明的冰箱其包括：貯藏室；與該貯藏室連通的風路；冷卻器，其設置於該風路上，冷卻在上述風路中流動的空氣；加熱器，其加熱上述冷卻器，並於上述冷卻器上結霜的第1結霜狀態中使得加熱容量為第1容量，在上述冷卻器的結霜少於上述第1結霜狀態的第2結霜狀態中使得加熱容量為第2容量；第1溫度感測器，其檢出上述冷卻器的溫度；其中上述加熱器，當上述第1溫度感測器的檢出值大於第4判斷值，則以上述第2容量加熱上述冷卻器，當上述第1溫度感測器的檢出值為上述第4判斷值以下，則以上述第1容量加熱上述冷卻器；上述第2容量小於上述第1容量。 The refrigerator according to the present invention includes: a storage chamber; an air path communicating with the storage chamber; a cooler provided on the air path to cool air flowing in the air path; a heater that heats the cooler, and In the first frosted state of the frost on the cooler, the heating capacity is set to the first capacity, and in the second frosted state of the frost that is less than the first frosted state, the heating capacity is set to the second capacity. A first temperature sensor that detects the temperature of the cooler; wherein the heater, when the detected value of the first temperature sensor is greater than a fourth judgment value, heats the cooler with the second capacity When the detected value of the first temperature sensor is equal to or lower than the fourth judgment value, the cooler is heated with the first capacity; the second capacity is smaller than the first capacity.

本發明的冰箱中，在冷卻器的結霜量多的第1結 霜狀態下，能夠增加加熱器的加熱容量以進行除霜運轉。因此，本發明的冰箱，能夠抑制在欲將結霜量多的冷卻器除霜時，除霜時間變長的情況，並能夠抑制貯藏室內的溫度上升的情況。另外，本發明的冰箱中，在冷卻器的結霜量少的第2結霜狀態下，使加熱器的加熱容量低於第1結霜狀態時的加熱容量以進行除霜運轉。因此，本發明的冰箱，能夠抑制在欲將結霜量少冷卻器除霜時，冷卻器的空氣排出口側的溫度上升的情況。亦即，本發明的冰箱，在欲將結霜量少的冷卻器除霜時，也能夠抑制貯藏室內的溫度上升。 In the refrigerator of the present invention, in the first frosting state where the amount of frost on the cooler is large, the heating capacity of the heater can be increased to perform the defrosting operation. Therefore, the refrigerator of the present invention can suppress a situation where the defrosting time becomes longer when a cooler with a large amount of frost is to be defrosted, and can suppress a temperature rise in the storage room. Moreover, in the refrigerator of this invention, in the 2nd frosting state with a small amount of frost of a cooler, the heating capacity of a heater is made lower than the heating capacity in the 1st frosting state, and a defrosting operation is performed. Therefore, the refrigerator of the present invention can suppress the temperature rise of the air discharge port side of the cooler when it is desired to defrost the cooler with a small amount of frost. That is, the refrigerator of the present invention can suppress the temperature rise in the storage room even when it is intended to defrost a cooler with a small amount of frost.

1‧‧‧框體 1‧‧‧frame

1a‧‧‧內箱 1a‧‧‧inner box

1b‧‧‧外箱 1b‧‧‧Outer box

2‧‧‧機械室 2‧‧‧machine room

3‧‧‧風路 3‧‧‧ wind road

4‧‧‧吹出風路 4‧‧‧ blow out the wind

5‧‧‧吹出風路 5‧‧‧ blow out the wind

6‧‧‧吹出風路 6‧‧‧ blow out the wind

7‧‧‧回流風路 7‧‧‧ return air path

8‧‧‧回流風路 8‧‧‧ return air path

9a‧‧‧風檔 9a‧‧‧windshield

9b‧‧‧風檔 9b‧‧‧windshield

10‧‧‧風扇 10‧‧‧fan

11‧‧‧輻射加熱器 11‧‧‧ Radiant heater

12‧‧‧接觸型加熱器 12‧‧‧contact heater

21‧‧‧冷藏室 21‧‧‧Refrigerator

22‧‧‧冷凍室 22‧‧‧Freezer

23‧‧‧蔬果室 23‧‧‧ Fruit and Vegetable Room

24‧‧‧門片 24‧‧‧ Door

25‧‧‧門片 25‧‧‧ Door

26‧‧‧門片 26‧‧‧ Door

31‧‧‧溫度感測器 31‧‧‧Temperature Sensor

32‧‧‧溫度感測器 32‧‧‧Temperature sensor

33‧‧‧溫度感測器 33‧‧‧Temperature sensor

34‧‧‧溫度感測器 34‧‧‧Temperature sensor

35‧‧‧門片開閉感測器 35‧‧‧Door opening and closing sensor

36‧‧‧輸入電流檢出感測器 36‧‧‧Input current detection sensor

37‧‧‧濕度感測器 37‧‧‧Humidity sensor

38‧‧‧溫度感測器 38‧‧‧Temperature sensor

50‧‧‧冷凍循環回路 50‧‧‧freezing circuit

51‧‧‧壓縮機 51‧‧‧compressor

52‧‧‧放熱器 52‧‧‧ Radiator

53‧‧‧減壓裝置 53‧‧‧ Decompression device

54‧‧‧冷卻器 54‧‧‧Cooler

60‧‧‧控制裝置 60‧‧‧Control device

61‧‧‧控制部 61‧‧‧Control Department

62‧‧‧判斷部 62‧‧‧Judgment Department

63‧‧‧計時部 63‧‧‧Timekeeping Department

64‧‧‧記憶部 64‧‧‧Memory Department

70‧‧‧電路 70‧‧‧circuit

71‧‧‧電源 71‧‧‧ Power

72‧‧‧第1配線部 72‧‧‧The first wiring department

73‧‧‧第2配線部 73‧‧‧The second wiring department

74‧‧‧電阻體 74‧‧‧ Resistor

75‧‧‧開關 75‧‧‧ switch

76‧‧‧第1電源 76‧‧‧The first power supply

77‧‧‧第2電源 77‧‧‧Second power supply

100‧‧‧冰箱 100‧‧‧ refrigerator

第1圖為表示本發明的實施形態1的冰箱之一例的側面縱剖面圖。 FIG. 1 is a side vertical sectional view showing an example of a refrigerator according to Embodiment 1 of the present invention.

第2圖為表示本發明的實施形態1的冰箱之電路之一例的圖。 Fig. 2 is a diagram showing an example of a circuit of a refrigerator according to the first embodiment of the present invention.

第3圖為表示本發明的實施形態1的冰箱之電路之一例的圖。 Fig. 3 is a diagram showing an example of a circuit of a refrigerator according to the first embodiment of the present invention.

第4圖為表示本發明的實施形態1的冰箱之風路內的立體圖。 Fig. 4 is a perspective view showing the inside of the air duct of the refrigerator according to the first embodiment of the present invention.

第5圖為表示在過去的方法中，對結霜量少之狀態的冷卻器除霜時，冷卻器之溫度變化的圖。 Fig. 5 is a diagram showing a change in the temperature of the cooler when defrosting the cooler with a small amount of frost in the conventional method.

第6圖為表示在本發明的實施形態1的冰箱中，將結霜量少之狀態的冷卻器除霜時，冷卻器之溫度變化的圖。 FIG. 6 is a diagram showing changes in the temperature of the cooler when the cooler with a small amount of frost is defrosted in the refrigerator according to the first embodiment of the present invention.

第7圖為表示在本發明的實施形態1的冰箱中，於結霜量少之狀態的除霜運轉的另一例之圖。 Fig. 7 is a diagram showing another example of the defrosting operation in the refrigerator in the first embodiment of the present invention in a state where the amount of frost formation is small.

第8圖為表示本發明的實施形態1的冰箱中，輻射加熱器通電時的冷卻器之溫度變化的圖。 Fig. 8 is a diagram showing the temperature change of the cooler when the radiant heater is turned on in the refrigerator according to the first embodiment of the present invention.

第9圖為表示本發明的實施形態1的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 Fig. 9 is a flowchart showing an example of a method for determining a frost amount of a cooler in the refrigerator according to the first embodiment of the present invention.

第10圖為表示本發明的實施形態1的冰箱中，從除霜運轉結束時起算的運轉時間和冷卻器之結霜量的關係之圖。 Fig. 10 is a diagram showing the relationship between the operation time and the amount of frost formation on the cooler in the refrigerator according to the first embodiment of the present invention, which is calculated from the end of the defrost operation.

第11圖為表示本發明的實施形態1的冰箱中，門片開閉次數和冷卻器之結霜量的關係之圖。 Fig. 11 is a graph showing the relationship between the number of door opening and closing times and the amount of frost on the cooler in the refrigerator according to the first embodiment of the present invention.

第12圖為表示本發明的實施形態1的冰箱之一例的側面縱剖面圖。 Fig. 12 is a side vertical sectional view showing an example of a refrigerator according to the first embodiment of the present invention.

第13圖為表示本發明的實施形態1的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 FIG. 13 is a flowchart showing an example of a method for determining a frost amount of a cooler in the refrigerator according to the first embodiment of the present invention.

第14圖為表示本發明的實施形態1的冰箱的風扇之P-Q特性(風量-靜壓特性)的圖。 Fig. 14 is a diagram showing P-Q characteristics (air volume-static pressure characteristics) of the fan of the refrigerator in the first embodiment of the present invention.

第15圖為表示本發明的實施形態1的冰箱之一例的側面縱剖面圖。 Fig. 15 is a side vertical sectional view showing an example of a refrigerator according to the first embodiment of the present invention.

第16圖為表示本發明的實施形態1的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 Fig. 16 is a flowchart showing an example of a method for determining a frost amount of a cooler in the refrigerator according to the first embodiment of the present invention.

第17圖為表示本發明的實施形態1的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 Fig. 17 is a flowchart showing an example of a method for determining a frost amount of a cooler in the refrigerator according to the first embodiment of the present invention.

第18圖為表示本發明的實施形態1的冰箱中，貯藏室內地濕度和冷卻器之結霜量的關係之圖。 Fig. 18 is a diagram showing the relationship between the humidity in the storage room and the amount of frost on the cooler in the refrigerator according to the first embodiment of the present invention.

第19圖為表示本發明的實施形態1的冰箱之一例的側面縱剖面圖。 Fig. 19 is a side vertical sectional view showing an example of a refrigerator according to the first embodiment of the present invention.

第20圖為表示本發明的實施形態1的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 Fig. 20 is a flowchart showing an example of a method for determining a frost amount of a cooler in the refrigerator according to the first embodiment of the present invention.

第21圖為表示本發明的實施形態2的冰箱之一例的側面縱剖面圖。 Fig. 21 is a side vertical sectional view showing an example of a refrigerator according to a second embodiment of the present invention.

第22圖為表示本發明的實施形態2的冰箱的風路內之立體圖。 Fig. 22 is a perspective view showing an inside of an air passage of a refrigerator according to a second embodiment of the present invention.

第23圖為表示本發明的實施形態2的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 Fig. 23 is a flowchart showing an example of a method for determining a frost amount of a cooler in a refrigerator according to a second embodiment of the present invention.

第24圖為表示實施形態1及實施形態2所示之結霜量判斷方法和加熱器加熱量的關係之圖。 Fig. 24 is a diagram showing the relationship between the frost formation judgment method and the heater heating amount shown in the first and second embodiments.

第25圖為表示本發明的結霜量判斷方法和加熱器加熱量之關係的一例之圖。 Fig. 25 is a diagram showing an example of the relationship between the frosting amount determining method and the heater heating amount of the present invention.

第26圖為表示本發明的結霜量判斷方法和加熱器加熱量之關係的一例之圖。 Fig. 26 is a diagram showing an example of the relationship between the frosting amount judging method and the heater heating amount of the present invention.

實施形態1 Embodiment 1

第1圖為表示本發明的實施形態1的冰箱之一例的側面縱剖面圖。另外，第1圖及後述的側面縱剖面圖圖示冰箱100時係以冰箱100的前面為左側。 FIG. 1 is a side vertical sectional view showing an example of a refrigerator according to Embodiment 1 of the present invention. In addition, FIG. 1 and a side longitudinal sectional view described later show that the front side of the refrigerator 100 is left when the refrigerator 100 is shown.

本實施形態1的冰箱100包括：貯藏室；與該貯藏室連通的風路3；設置於該風路3的冷卻器54；及在除霜運轉時加熱冷卻器54的輻射加熱器11等。 The refrigerator 100 according to the first embodiment includes a storage room, an air passage 3 communicating with the storage room, a cooler 54 provided in the air passage 3, and a radiant heater 11 that heats the cooler 54 during a defrosting operation.

貯藏室及風路3形成於框體1。此框體1由設置於內箱1a、外箱1b、內箱1a和外箱1b之間的隔熱材等構成。框體1形成為前面側開口的箱型形狀，框體1中的內箱1a的內部為貯藏室。本實施形態1中，內箱1a的內部被分隔板分隔形成複數的貯藏室。詳言之，如第1圖所示，本實施形態1的冰箱 100具有冷藏室21、冷凍室22及蔬果室23以作為貯藏室。 The storage room and the air passage 3 are formed in the housing 1. This frame 1 is composed of an inner box 1a, an outer box 1b, a heat insulating material provided between the inner box 1a and the outer box 1b, and the like. The frame 1 is formed in a box shape with an open front side, and the inside of the inner box 1a in the frame 1 is a storage room. In the first embodiment, the inside of the inner box 1a is partitioned by a partition plate to form a plurality of storage rooms. Specifically, as shown in FIG. 1, the refrigerator 100 according to the first embodiment includes a refrigerator compartment 21, a freezer compartment 22, and a fruit and vegetable compartment 23 as storage rooms.

另外，貯藏室的種類及貯藏室的個數僅為一例。 The types of storage rooms and the number of storage rooms are only examples.

冷藏室21係為被冷卻到0℃~5℃的冷藏溫度帶之貯藏室，其配置在框體1的最上部。冷凍室22為設定成將貯藏物冷凍的-15℃~-20℃的冷凍溫度帶之貯藏室，其配置於冷藏室21的下方。蔬果室23為設定成適合蔬菜貯藏的0℃~5℃之溫度帶的貯藏室，其配置於冷凍室22的下方。 The refrigerating compartment 21 is a storage compartment in a refrigerated temperature zone cooled to 0 ° C. to 5 ° C., and is arranged at the uppermost portion of the housing 1. The freezer compartment 22 is a storage compartment set to a freezing temperature range of -15 ° C to -20 ° C for freezing the stored items, and is arranged below the refrigerating compartment 21. The fruit and vegetable compartment 23 is a storage compartment set to a temperature range of 0 ° C. to 5 ° C. suitable for vegetable storage, and is disposed below the freezing compartment 22.

在上述各貯藏室設有以可自由開閉的方式蓋住各貯藏室的開口部之門片。詳言之，冷藏室21的開口部設置以可自由開閉的方式蓋住該開口部的門片24。冷凍室22的開口部設置以可自由開閉的方式蓋住該開口部的門片25。蔬果室23的開口部設置以可自由開閉的方式蓋住該開口部的門片26。另外，在這些各貯藏室亦設有檢出各貯藏室的溫度之溫度感測器。詳言之，冷藏室21中設有溫度感測器31，冷凍室22中設有溫度感測器32，蔬果室23中設有溫度感測器33。 Each of the storage rooms is provided with a door piece that covers the opening of each storage room so as to be freely openable and closable. In detail, the opening part of the refrigerator compartment 21 is provided with the door piece 24 which covers this opening part so that it can open and close freely. The opening part of the freezer compartment 22 is provided with the door piece 25 which covers this opening part so that it can open and close freely. An opening portion of the vegetable and fruit room 23 is provided with a door piece 26 that covers the opening portion so as to be openable and closable. In addition, a temperature sensor that detects the temperature of each of the storage rooms is also provided in each of the storage rooms. Specifically, a temperature sensor 31 is provided in the refrigerating compartment 21, a temperature sensor 32 is provided in the freezing compartment 22, and a temperature sensor 33 is provided in the fruit and vegetable room 23.

風路3形成於貯藏室的背面側。此風路3藉由吹出風路及回流風路，與各貯藏室連通。詳言之，風路3和冷藏室21，係藉由吹出風路4及未圖示的回流風路而連接。風路3和冷凍室22，藉由吹出風路5及回流風路7而連接。風路3和蔬果室23藉由吹出風路6及回流風路8而連接。 The air path 3 is formed on the back side of the storage room. This air path 3 is communicated with each storage chamber by a blow-out air path and a return air path. Specifically, the air path 3 and the refrigerating chamber 21 are connected by the blow-out air path 4 and a return air path (not shown). The air path 3 and the freezing chamber 22 are connected by a blow-out air path 5 and a return air path 7. The air path 3 and the fruit and vegetable room 23 are connected by blowing out the air path 6 and the return air path 8.

如上述，風路3上設有冷卻器54。此冷卻器54係為用以冷卻在風路3中流動的空氣，詳言之即為從貯藏室流入風路3，再供給至貯藏室的空氣。另外，在風路3中的例如冷卻器54的上方處，亦設有將冷卻器54所冷卻的空氣吹送到各 貯藏室的風扇10。另外，在風路3中的例如冷卻器54的下方處，亦設有在除霜運轉時，利用輻射熱將冷卻器54全體加熱的輻射加熱器11。 As described above, the air cooler 3 is provided with the cooler 54. The cooler 54 is used to cool the air flowing in the air passage 3, specifically, the air flowing from the storage chamber into the air passage 3 and then supplied to the storage chamber. A fan 10 for blowing air cooled by the cooler 54 to each of the storage chambers is also provided above the cooler 54 in the air passage 3, for example. In addition, for example, below the cooler 54 in the air passage 3, a radiant heater 11 that heats the entire cooler 54 by radiant heat during a defrosting operation is also provided.

亦即為後述構成：由冷卻器54所冷卻的空氣，通過吹出風路4而流入冷藏室21，將存放在冷藏室21內的食品等冷卻。而且，其構成為：已將該食品等冷卻的空氣，通過未圖示的回流風路流回到風路3，再次由冷卻器54冷卻。另外，其構成為：已由冷卻器54冷卻的空氣，通過吹出風路5流入冷凍室22，將存放在冷凍室22內的食品等冷卻。而且，其構成為：已將該食品等冷卻的空氣，通過回流風路7回到風路3，再次由冷卻器54冷卻。而且，其構成為：由冷卻器54冷卻的空氣，通過吹出風路6流入蔬果室23，將存放在蔬果室23內的食品等冷卻。而且，其構成為：已將該食品等冷卻的空氣，通過回流風路8回到風路3，再次油冷卻器54冷卻。 That is, the structure described later is that the air cooled by the cooler 54 flows into the refrigerating compartment 21 through the air passage 4 and cools foods and the like stored in the refrigerating compartment 21. The air cooled by the food or the like is returned to the air path 3 through a return air path (not shown), and is cooled again by the cooler 54. In addition, the air cooled by the cooler 54 flows into the freezing compartment 22 through the blow-out air passage 5 to cool foods and the like stored in the freezing compartment 22. Then, the air cooled by the food or the like is returned to the air path 3 through the return air path 7 and is cooled again by the cooler 54. In addition, the air cooled by the cooler 54 flows into the fruit and vegetable compartment 23 through the blow-out air passage 6 to cool foods and the like stored in the fruit and fruit compartment 23. Then, the air cooled by the food or the like is returned to the air passage 3 through the return air passage 8 and cooled by the oil cooler 54 again.

另外，本實施形態1中，連通各貯藏室和風路3的回流風路，在位於冷卻器54下方的位置與風路3連通。亦即，本實施形態1中，冷卻器54的下端為空氣流入口，冷卻器54的上端為空氣排出口。 In addition, in the first embodiment, the return air passage that connects the storage compartments and the air passage 3 is communicated with the air passage 3 at a position below the cooler 54. That is, in the first embodiment, the lower end of the cooler 54 is an air inlet, and the upper end of the cooler 54 is an air outlet.

另外，本實施形態1中，在連通風路3和冷藏室21的吹出風路4上設有風檔(damper)9a。另外，在連通風路3和蔬果室23的吹出風路6上設有風檔9b。亦即構成為：能夠藉由風檔9a的開閉，調整對冷藏室21提供冷卻空氣的供給量。另外，能夠藉由風檔9b的開閉，調整對蔬果室23提供冷卻空氣的供給量。 Further, in the first embodiment, a damper 9a is provided on the blow-out air path 4 connecting the air path 3 and the refrigerator compartment 21. In addition, a windshield 9b is provided on the blow-out air path 6 connecting the air path 3 and the fruit and vegetable room 23. That is, it is configured such that the amount of cooling air supplied to the refrigerating compartment 21 can be adjusted by opening and closing the windshield 9a. In addition, the amount of cooling air supplied to the fruit and vegetable compartment 23 can be adjusted by opening and closing the windshield 9b.

上述的冷卻器54構成冷凍循環回路50。該冷凍循 環回路50係將壓縮機51、放熱器52、減壓裝置53及冷卻器54以配管連接而成。 The above-mentioned cooler 54 constitutes a refrigeration cycle 50. This refrigerating cycle circuit 50 is formed by connecting a compressor 51, a radiator 52, a pressure reducing device 53, and a cooler 54 with pipes.

壓縮機51，吸入從冷卻器54流出的低溫低壓的冷媒，並將之壓縮成高溫高壓的氣體冷媒。該壓縮機51設置在形成於框體1之下部背面側的機械室2中。放熱器52，使得在壓縮機51被壓縮的高溫高壓的氣體冷媒放熱，使得該氣體冷媒凝縮為高壓的液冷媒。該放熱器52，為例如鰭片管型的熱交換器，其係設置在機械室2。 The compressor 51 sucks the low-temperature and low-pressure refrigerant flowing from the cooler 54 and compresses it into a high-temperature and high-pressure gas refrigerant. The compressor 51 is installed in a machine room 2 formed on the back side of the lower portion of the housing 1. The radiator 52 allows the high-temperature and high-pressure gas refrigerant compressed in the compressor 51 to release heat, and condenses the gas refrigerant into a high-pressure liquid refrigerant. The radiator 52 is, for example, a fin-tube heat exchanger, and is installed in the machine room 2.

減壓裝置53為毛細管或電磁膨脹閥等，其係為使得從放熱器52流出的高壓的液冷媒膨脹為低溫低壓的氣液二相冷媒的裝置。該減壓裝置53設置於機械室2。冷卻器54為例如鰭片管型的熱交換器，其係為使得從減壓裝置53流出的低溫低壓的氣液二相冷媒和從各貯藏室流出的空氣進行熱交換，以將該空氣冷卻的裝置。 The pressure reducing device 53 is a capillary tube, an electromagnetic expansion valve, or the like, and is a device that expands a high-pressure liquid refrigerant flowing out of the radiator 52 into a low-temperature and low-pressure gas-liquid two-phase refrigerant. This pressure reducing device 53 is provided in the machine room 2. The cooler 54 is, for example, a fin-tube type heat exchanger, which is configured to perform heat exchange between the low-temperature and low-pressure gas-liquid two-phase refrigerant flowing out of the pressure reducing device 53 and the air flowing out of each storage chamber to cool the air installation.

另外，本實施形態1的冰箱100具有例如由微電腦等構成的控制裝置60。該控制裝置60設置在例如框體1的上部背面側，其具有控制部61、判斷部62、計時部63及記憶部64等。另外，第1圖中，為了方便起見，在圖式中沒有顯示控制裝置60。 The refrigerator 100 according to the first embodiment includes a control device 60 made of, for example, a microcomputer or the like. The control device 60 is provided, for example, on the upper back surface side of the housing 1, and includes a control section 61, a determination section 62, a timer section 63, a memory section 64, and the like. In FIG. 1, the control device 60 is not shown in the drawing for the sake of convenience.

控制部61，控制壓縮機51的啟動及停止、壓縮機51的轉數、風扇10的啟動及停止、風扇10的轉數、風檔9a,9b的開度、減壓裝置53的開度、是否對輻射加熱器11通電、以及輻射加熱器11通電時的加熱容量[W](亦即耗電量)等。判斷部62為判斷冷卻器54的結霜量的裝置。本實施形態1中，判 斷部62係判斷是處於冷卻器54的結霜量多的第1結霜狀態、或者冷卻器54的結霜量少的第2結霜狀態。計時部63，為計測冰箱100的運轉時間等的時間的裝置。記憶部64事先記憶控制部61對控制對象進行控制時、及判斷部62判斷結霜量時等所使用的數值、數學式、表格等。 The control unit 61 controls the start and stop of the compressor 51, the rotation number of the compressor 51, the start and stop of the fan 10, the rotation number of the fan 10, the opening degrees of the windshields 9a, 9b, the opening degree of the pressure reducing device 53, Whether the radiant heater 11 is energized and the heating capacity [W] (that is, power consumption) when the radiant heater 11 is energized. The determination unit 62 is a device that determines the amount of frost on the cooler 54. In the first embodiment, the judging unit 62 judges that it is in the first frosted state with a large amount of frost on the cooler 54 or the second frosted state with a small amount of frost on the cooler 54. The timer unit 63 is a device that measures time such as the operating time of the refrigerator 100. The memory unit 64 previously stores numerical values, mathematical formulas, tables, and the like used when the control unit 61 controls the control target and when the determination unit 62 determines the amount of frost formation.

在此，本實施形態1的冰箱100，於冷卻器54的結霜量多的情況和少的情況下，使得輻射加熱器11的加熱容量有所不同。因此，冰箱100具備例如後述的電路。 Here, in the refrigerator 100 according to the first embodiment, the heating capacity of the radiant heater 11 is different when the amount of frost on the cooler 54 is large or small. Therefore, the refrigerator 100 is equipped with the circuit mentioned later, for example.

第2圖為表示本發明的實施形態1的冰箱之電路之一例的圖。 Fig. 2 is a diagram showing an example of a circuit of a refrigerator according to the first embodiment of the present invention.

第2圖所示的電路70，在輻射加熱器11和電源71之間，具有電阻體74的第1配線部72和不具有電阻體的第2配線部73並聯連接。另外，第2圖所示電路70具有開關75，其可切換為電源71、第1配線部72及輻射加熱器11連接的封閉電路、或者電源71、第2配線部73及輻射加熱器11連接的封閉電路。藉由將開關75切換到電源71、第2配線部73及輻射加熱器11連接的封閉電路，能夠使得輻射加熱器11的加熱容量變大。另外，藉由將開關75切換到電源71、具有電阻體74的第1配線部72及輻射加熱器11連接的封閉電路，使得流到輻射加熱器11的電流減少，而能夠使得輻射加熱器11的加熱容量變小。 The circuit 70 shown in FIG. 2 is connected in parallel between the radiant heater 11 and the power source 71 with a first wiring portion 72 having a resistor 74 and a second wiring portion 73 having no resistor. In addition, the circuit 70 shown in FIG. 2 has a switch 75 that can be switched to a closed circuit to which the power source 71, the first wiring portion 72 and the radiant heater 11 are connected, or the power source 71, the second wiring portion 73 and the radiant heater 11 to be connected Closed circuit. By switching the switch 75 to a closed circuit connected to the power source 71, the second wiring portion 73, and the radiant heater 11, the heating capacity of the radiant heater 11 can be increased. In addition, by switching the switch 75 to the power source 71, the first wiring portion 72 having the resistor body 74, and the closed circuit connected to the radiant heater 11, the current flowing to the radiant heater 11 is reduced, and the radiant heater 11 can be made The heating capacity becomes smaller.

另外，開關75的切換係由控制部61執行。另外，第2配線部73只要構成為較第1配線部低電阻即可。因此，也可以在第2配線部上設置較電阻體74低電阻的電阻體。 The switching of the switch 75 is performed by the control unit 61. The second wiring portion 73 may be configured to have a lower resistance than the first wiring portion. Therefore, a resistor having a lower resistance than the resistor 74 may be provided on the second wiring portion.

第3圖為表示本發明的實施形態1的冰箱之電路之 一例的圖。像這樣構成電路70，於冷卻器54的結霜量多的情況和少的情況下，也能夠使得輻射加熱器11的加熱容量有所不同。 Fig. 3 is a diagram showing an example of a circuit of a refrigerator according to the first embodiment of the present invention. By configuring the circuit 70 in this manner, the heating capacity of the radiant heater 11 can be made different when the amount of frost on the cooler 54 is large or small.

亦即，第3圖所示電路70具有開關75，其可以切換為第1電源76和輻射加熱器11連接的封閉電路、或者第2電源77和輻射加熱器11連接的封閉電路。只要第1電源76的供給電壓和第2電源77的供給電壓不同，就能夠藉由切換開關75，使得輻射加熱器11的加熱容量有所不同。另外，第1電源76及第2電源77未必屬於冰箱100的構成。在冰箱100的設置場所有供給電壓相異的2個電源的情況下，使用這些電源作為第1電源76及第2電源77即可。另外，例如，電路70具有2個變壓器，將這些變壓器和商用電源等連接，使用這些變壓器作為第1電源76及第2電源77亦可。另外，例如，使第1電源76及第2電源77當中的一者為商用電源，使第1電源76及第2電源77當中的另一者為變壓器亦可。 That is, the circuit 70 shown in FIG. 3 includes a switch 75 that can be switched to a closed circuit connected to the first power source 76 and the radiant heater 11 or a closed circuit connected to the second power source 77 and the radiant heater 11. As long as the supply voltage of the first power source 76 and the supply voltage of the second power source 77 are different, the heating capacity of the radiant heater 11 can be changed by changing the switch 75. The first power source 76 and the second power source 77 do not necessarily belong to the configuration of the refrigerator 100. In a case where the two installations of the refrigerator 100 have different supply voltages, these power supplies may be used as the first power supply 76 and the second power supply 77. In addition, for example, the circuit 70 includes two transformers, and these transformers are connected to a commercial power source or the like, and these transformers may be used as the first power source 76 and the second power source 77. In addition, for example, one of the first power source 76 and the second power source 77 may be a commercial power source, and the other of the first power source 76 and the second power source 77 may be a transformer.

[動作說明] [Action description]

如上述構成的冰箱100係依據如後述的方式動作。 The refrigerator 100 configured as described above operates in a manner to be described later.

(通常運轉) (Normal operation)

將貯藏室內的食品等冷卻的通常運轉係以如後述方式進行。 The normal operation of cooling foods and the like in the storage room is performed as described below.

控制部61控制壓縮機51，以使得設置於冷凍室22的溫度感測器32之檢出值等於記憶在記憶部64的設定溫度。亦即，當溫度感測器32的檢出值高於設定溫度時，控制部61使壓縮機51啟動。另外，當溫度感測器32的檢出值低於設定溫度時，控制部61使壓縮機51停止。也可以在壓縮機51正在運轉的時候，依據溫度感測器32的檢出值和設定溫度之間的差值， 改變壓縮機51的轉數。 The control unit 61 controls the compressor 51 so that the detection value of the temperature sensor 32 provided in the freezer compartment 22 is equal to the set temperature stored in the memory unit 64. That is, when the detection value of the temperature sensor 32 is higher than the set temperature, the control unit 61 starts the compressor 51. When the value detected by the temperature sensor 32 is lower than the set temperature, the control unit 61 stops the compressor 51. When the compressor 51 is running, the number of revolutions of the compressor 51 may be changed according to the difference between the detected value of the temperature sensor 32 and the set temperature.

另外，控制部61控制風檔9a的開度，以使得設置於冷凍室21的溫度感測器31之檢出值等於記憶在記憶部64的設定溫度。亦即，當溫度感測器31的檢出值高於設定溫度時，控制部61打開風檔9a，將冷卻空氣供給到冷藏室21。另外，當溫度感測器31的檢出值低於設定溫度時，控制部61關閉風檔9a。正在對冷藏室21供給冷卻空氣的時候，也可以依據溫度感測器31的檢出值和設定溫度之間的差值，改變風檔9a的開度。 In addition, the control section 61 controls the opening degree of the windshield 9 a so that the detection value of the temperature sensor 31 provided in the freezer compartment 21 is equal to the set temperature stored in the storage section 64. That is, when the detection value of the temperature sensor 31 is higher than the set temperature, the control section 61 opens the air damper 9 a and supplies cooling air to the refrigerating compartment 21. In addition, when the detected value of the temperature sensor 31 is lower than the set temperature, the control unit 61 closes the windshield 9a. When cooling air is being supplied to the refrigerator compartment 21, the opening degree of the windshield 9a may be changed according to the difference between the detection value of the temperature sensor 31 and the set temperature.

同樣地，控制部61控制風檔9b的開度，以使得設置在蔬果室23的溫度感測器33之檢出值等於記憶在記憶部64的設定溫度。亦即，當溫度感測器33的檢出值高於設定溫度時，控制部61打開風檔9b，將冷卻空氣供給至蔬果室23。另外，當溫度感測器33的檢出值低於設定溫度時，控制部61關閉風檔9b。正在對蔬果室23供給冷卻空氣時，也可以依據溫度感測器33的檢出值和設定溫度之間的差值，改變風檔9b的開度。 Similarly, the control unit 61 controls the opening degree of the windshield 9b so that the detection value of the temperature sensor 33 provided in the fruit and vegetable room 23 is equal to the set temperature memorized in the memory unit 64. That is, when the detection value of the temperature sensor 33 is higher than the set temperature, the control section 61 opens the windshield 9b and supplies cooling air to the fruit and vegetable room 23. In addition, when the detection value of the temperature sensor 33 is lower than the set temperature, the control section 61 closes the windshield 9b. When cooling air is being supplied to the fruit and vegetable room 23, the opening degree of the windshield 9b may be changed according to the difference between the detected value of the temperature sensor 33 and the set temperature.

(除霜運轉) (Defrosting operation)

在通常運轉中，為了放入或取出食品等而將貯藏室的門片開閉時，冰箱外部的潮濕空氣流入該貯藏室內。另外，存放在貯藏室的食品等也會產生水蒸氣。因此，從貯藏室回流到風路3的空氣中含有食品等所產生的水蒸氣。因此，隨著通常運轉持續進行，來自貯藏室的回流空氣中所包含的水蒸氣變成霜，附著在冷卻器54。而且，隨著冷卻器54的結霜量增加，冷卻器54的冷卻性能降低。因此，有必要定期地除去附著在冷卻器54上的霜。 In normal operation, when the door of a storage room is opened or closed for putting in or taking out food, etc., humid air outside the refrigerator flows into the storage room. In addition, food stored in a storage room may generate water vapor. Therefore, the air returning from the storage room to the air path 3 contains water vapor generated from food and the like. Therefore, as the normal operation continues, water vapor contained in the return air from the storage compartment becomes frost and adheres to the cooler 54. Moreover, as the amount of frost formation of the cooler 54 increases, the cooling performance of the cooler 54 decreases. Therefore, it is necessary to periodically remove the frost adhering to the cooler 54.

另外，本實施形態1中，例如，當冰箱100的運 轉時間超過記憶在記憶部64中的規定時間時，控制部61開始冷卻器54的除霜(亦即除霜運轉)。該規定時間為例如1天。另外，由計時部63計測冰箱100的運轉。 In the first embodiment, for example, when the operation time of the refrigerator 100 exceeds a predetermined time stored in the memory unit 64, the control unit 61 starts the defrosting of the cooler 54 (i.e., the defrosting operation). The predetermined time is, for example, one day. The operation of the refrigerator 100 is measured by the timer unit 63.

另外，例如，當將壓縮機51持續驅動一定時間以上，也無法將冷凍室22內冷卻到設定溫度時，控制部61執行除霜運轉。另外，壓縮機51是否已持續驅動一定時間以上，係藉由將計時部63所計測的壓縮機51的運轉時間、和記憶在記憶部64中的規定時間進行比較而判斷。此判斷係由例如控制部61或判斷部62執行。 In addition, for example, when the compressor 51 is continuously driven for a certain period of time or more, the interior of the freezer compartment 22 cannot be cooled to a set temperature, the control unit 61 performs a defrosting operation. In addition, whether or not the compressor 51 has been continuously driven for a predetermined time or longer is determined by comparing the operating time of the compressor 51 measured by the timer section 63 with a predetermined time stored in the memory section 64. This determination is performed by, for example, the control section 61 or the determination section 62.

另外，本實施形態1的冰箱100具備檢出冷卻器54的溫度之溫度感測器34。當該溫度感測器34的檢出值超過記憶在記憶部64中的規定溫度時，即結束除霜運轉。規定溫度為例如5℃。亦即，控制部61停止對輻射加熱器11通電。如後述，冷卻器54是從作為空氣流入口的下端側開始結霜。然後，進行了除霜運轉，附著在冷卻器54之下端側的霜最後才融掉。因此，用以判斷除霜運轉的結束之溫度感測器34，設置在冷卻器54的下端附近為佳。 The refrigerator 100 according to the first embodiment includes a temperature sensor 34 that detects the temperature of the cooler 54. When the value detected by the temperature sensor 34 exceeds a predetermined temperature stored in the memory portion 64, the defrosting operation is terminated. The predetermined temperature is, for example, 5 ° C. That is, the control unit 61 stops energizing the radiant heater 11. As described later, the cooler 54 starts to frost from the lower end side serving as the air inlet. Then, the defrosting operation was performed, and the frost deposited on the lower end side of the cooler 54 finally melted away. Therefore, the temperature sensor 34 for determining the end of the defrosting operation is preferably provided near the lower end of the cooler 54.

另外，溫度感測器34，相當於本發明的第1溫度感測器。 The temperature sensor 34 corresponds to a first temperature sensor of the present invention.

在此，過去的冰箱除，在進行除霜運轉時，不論冷卻器的結霜量的多寡，都使得加熱器的加熱容量[W]為固定。因此，過去的冰箱有如後述的課題。 Here, in the conventional refrigerator defrosting operation, the heating capacity [W] of the heater was kept constant regardless of the amount of frost on the cooler. Therefore, conventional refrigerators have problems as described below.

第4圖為表示本發明的實施形態1的冰箱之風路內的立體圖。另外，第4圖所示的中空箭頭係表示風路3內的空氣流動方向。 Fig. 4 is a perspective view showing the inside of the air duct of the refrigerator according to the first embodiment of the present invention. The hollow arrows shown in FIG. 4 indicate the direction of air flow in the air passage 3.

如上述，來自各貯藏室的回流空氣，從作為空氣流入口的冷卻器54之下端流入冷卻器54，再從作為空氣排出口的冷卻器54之上端流出。此時，在冷卻器54上尚未結霜的狀態下，來自各貯藏室的回流空氣，容易從冷卻器54的下端當中通風電阻較少的中央附近(換言之，較遠離風路3側壁的位置)流入冷卻器54。因此，冷卻器54先從第4圖中範圍A所示的下端之中央附近開始結霜。另外，隨著範圍A中的結霜的進行，範圍A的通風電阻變大。因此，冷卻器54，隨著範圍A中的結霜的進行，在下端的範圍B中也開始結霜。然後，當範圍A,B都結霜之後，結霜朝向冷卻器54的上端側進行，在範圍C中也結霜，使得冷卻器54全體都結霜。 As described above, the return air from each storage chamber flows into the cooler 54 from the lower end of the cooler 54 as the air inlet, and then flows out from the upper end of the cooler 54 as the air outlet. At this time, in a state where frost is not yet formed on the cooler 54, the return air from each storage room is easy to pass from the lower end of the cooler 54 near the center with less ventilation resistance (in other words, a position farther from the side wall of the air passage 3) Inflow cooler 54. Therefore, the cooler 54 starts to frost from the vicinity of the center of the lower end shown in the range A in FIG. 4. In addition, as the frost formation in the range A progresses, the ventilation resistance in the range A increases. Therefore, as the frost in the range A progresses, the cooler 54 also starts to frost in the range B at the lower end. Then, when the ranges A and B are frosted, the frosting progresses toward the upper end side of the cooler 54, and frosting also occurs in the range C, so that the entire cooler 54 is frosted.

亦即，在冷卻器54的結霜量少的階段中的狀態為，冷卻器54的空氣排出口側的結霜量少於冷卻器54的空氣流入口側的結霜量。因此，像過去的冰箱那樣，不論結霜量如何都使輻射加熱器11的加熱容量為一定的情況下，除霜運轉時的冷卻器54的溫度如後述的第5圖所示。 That is, in a state where the amount of frost on the cooler 54 is small, the amount of frost on the air discharge port side of the cooler 54 is smaller than the amount of frost on the air flow inlet side of the cooler 54. Therefore, as in conventional refrigerators, when the heating capacity of the radiant heater 11 is constant regardless of the amount of frost formation, the temperature of the cooler 54 during the defrosting operation is shown in FIG. 5 described later.

第5圖為表示在過去的方法中，將結霜量少之狀態的冷卻器除霜時，冷卻器之溫度變化的圖。另外，第5圖所示的粗實線表示在冷卻器54的上端附近(亦即空氣排出口附近)的溫度。另外，第5圖所示的粗虛線表示在冷卻器54的下端附近(亦即，空氣流入口附近)的溫度。 FIG. 5 is a diagram showing a change in the temperature of the cooler when the cooler with a small amount of frost is defrosted in the conventional method. The thick solid line shown in FIG. 5 indicates the temperature near the upper end of the cooler 54 (that is, near the air discharge port). The thick dotted line shown in FIG. 5 indicates the temperature near the lower end of the cooler 54 (that is, near the air inlet).

當除霜運轉開始，用輻射加熱器11加熱冷卻器54時，冷卻器54全體的溫度漸漸上升(狀態D)。然後，和霜一樣變成0℃，直到霜完全融掉為止，冷卻器54全體的溫度都保持 在0℃(狀態E)。如上述，在冷卻器54的結霜量少的階段中的狀態為，空氣排出口側的冷卻器54之上端側的結霜量少於作為空氣流入口側的冷卻器54之下端側的結霜量。因此，在冷卻器54的下端附近的霜完全融掉之前，冷卻器54的上端附近的霜就完全融掉了，且冷卻器54的上端附近的溫度上升(狀態F1)。此時，結霜量比上端附近還多的下端附近，霜還沒完全融掉，並且仍保持在0℃。之後，當冷卻器54的下端附近的霜也完全融掉時，冷卻器54的下端附近的溫度也開始上升(狀態G1)。然後，當設置在冷卻器54的溫度感測器34之檢出值超過規定溫度(例如5℃)時，即結束除霜運轉。亦即，控制部61停止對輻射加熱器11通電。 When the defrosting operation is started and the cooler 54 is heated by the radiant heater 11, the temperature of the entire cooler 54 gradually increases (state D). Then, it becomes 0 ° C like the frost, and the temperature of the entire cooler 54 is maintained at 0 ° C (state E) until the frost is completely melted. As described above, in the stage where the amount of frost on the cooler 54 is small, the amount of frost on the upper end side of the cooler 54 on the air outlet side is smaller than the frost on the lower end side of the cooler 54 as the air inlet side The amount of frost. Therefore, before the frost near the lower end of the cooler 54 is completely melted, the frost near the upper end of the cooler 54 is completely melted, and the temperature near the upper end of the cooler 54 rises (state F1). At this time, the amount of frost formed near the lower end was larger than that near the upper end, and the frost had not completely melted away, and remained at 0 ° C. After that, when the frost near the lower end of the cooler 54 is completely melted away, the temperature near the lower end of the cooler 54 also starts to rise (state G1). Then, when the detection value of the temperature sensor 34 provided in the cooler 54 exceeds a predetermined temperature (for example, 5 ° C.), the defrosting operation is ended. That is, the control unit 61 stops energizing the radiant heater 11.

像這樣，執行結霜量少的狀態的冷卻器54的除霜運轉時，若像過去那樣不論結霜量多寡都使輻射加熱器11的加熱容量為一定，則在以結霜量多的時候的除霜運轉為基準設定加熱容量的情況下，加熱容量會過大。因此，在狀態F1中，冷卻器54的上端附近的溫度上升速度會變大。亦即，在冷卻器54的下端附近的溫度上升之前，冷卻器54的上端附近就已經被過度加熱了。因此，如第5圖中的Ta所示，當除霜運轉結束的時候，冷卻器54的上端附近的溫度已經過度上升了。因此，當恢復到通常運轉時，供給至貯藏室的空氣在冷卻器54的上端側被加熱了，使得貯藏室內的溫度上升。另外，為了要把溫度已經上升的貯藏室內的空氣再度冷卻，而必須要耗費電力，使得耗電量增加。 As described above, when the defrosting operation of the cooler 54 in the state where the amount of frost formation is small, if the heating capacity of the radiant heater 11 is constant regardless of the amount of frost formation as in the past, when the amount of frost formation is large, When the heating capacity is set based on the defrost operation, the heating capacity will be too large. Therefore, in the state F1, the temperature rising speed near the upper end of the cooler 54 increases. That is, before the temperature near the lower end of the cooler 54 rises, the vicinity of the upper end of the cooler 54 is already excessively heated. Therefore, as shown by Ta in FIG. 5, when the defrosting operation is completed, the temperature near the upper end of the cooler 54 has excessively increased. Therefore, when the normal operation is resumed, the air supplied to the storage compartment is heated on the upper end side of the cooler 54 so that the temperature in the storage compartment rises. In addition, in order to cool the air in the storage room whose temperature has risen again, it is necessary to consume power, so that the power consumption is increased.

為了解決上記課題，考慮降低輻射加熱器11的加 熱容量。但是，像這樣使輻射加熱器11的加熱容量變小的情況下，在不論結霜量多寡都使得輻射加熱器11的加熱容量為一定的過去的方法中，欲將結霜量多的冷卻器54除霜時，會拉長除霜時間。亦即，在長時間中，無法將已冷卻的空氣供給至貯藏室。因此，用過去的方法進行除霜運轉的情況下，即使把加熱器的加熱容量變小，仍是會有貯藏室內的溫度上升的課題。另外，為了要把溫度已經上升的貯藏室內的空氣再度冷卻，而必須要耗費電力，使得耗電量增加。 In order to solve the above problem, it is considered to reduce the heating capacity of the radiant heater 11. However, in the case where the heating capacity of the radiant heater 11 is reduced as described above, in the conventional method in which the heating capacity of the radiant heater 11 is made constant regardless of the amount of frost, a cooler with a large amount of frost is intended. 54 When defrosting, the defrosting time will be prolonged. That is, the cooled air cannot be supplied to the storage room for a long time. Therefore, when the defrosting operation is performed by the conventional method, even if the heating capacity of the heater is reduced, there is still a problem that the temperature in the storage room rises. In addition, in order to cool the air in the storage room whose temperature has risen again, it is necessary to consume power, so that the power consumption is increased.

因此，本實施形態1的冰箱100，在冷卻器54的結霜量多的第1結霜狀態中的第1除霜運轉、以及冷卻器54的結霜量少的第2結霜狀態中的第2除霜運轉，使得輻射加熱器11的加熱容量有所不同。更詳言之，本實施形態1的冰箱100，使得作為第2結霜運轉時的輻射加熱器11的加熱容量之第2容量低於作為第1結霜運轉時的輻射加熱器11的加熱容量的第1容量。例如，使得作為第2結霜運轉時的輻射加熱器11的加熱容量之第2容量為定格容量的50%，使得作為第1結霜運轉時的輻射加熱器11的加熱容量之第1容量為定格容量的100%。 Therefore, in the refrigerator 100 according to the first embodiment, the first defrosting operation is performed in the first frosting state with a large amount of frost on the cooler 54 and The second defrosting operation makes the heating capacity of the radiant heater 11 different. More specifically, in the refrigerator 100 according to the first embodiment, the second capacity of the heating capacity of the radiant heater 11 during the second frosting operation is lower than the heating capacity of the radiant heater 11 during the first frosting operation. The first capacity. For example, the second capacity of the heating capacity of the radiant heater 11 during the second frosting operation is 50% of the fixed capacity, and the first capacity of the heating capacity of the radiant heater 11 during the first frosting operation is 100% of rated capacity.

第6圖為表示在本發明的實施形態1的冰箱中，將結霜量少之狀態的冷卻器除霜時，冷卻器之溫度變化的圖。另外，第6圖所示的粗實線表示在冷卻器54的上端附近(亦即空氣排出口附近)的溫度。另外，第6圖所示的粗虛線表示在冷卻器54的下端附近(亦即，空氣流入口附近)的溫度。 FIG. 6 is a diagram showing changes in the temperature of the cooler when the cooler with a small amount of frost is defrosted in the refrigerator according to the first embodiment of the present invention. The thick solid line shown in FIG. 6 indicates the temperature near the upper end of the cooler 54 (that is, near the air discharge port). The thick dotted line shown in FIG. 6 indicates the temperature near the lower end of the cooler 54 (that is, near the air inlet).

本實施形態1的冰箱100中，除霜運轉時的冷卻器54的溫度變化，基本上和過去的一樣。亦即，當除霜運轉 開始，用輻射加熱器11加熱冷卻器54時，冷卻器54全體的溫度漸漸上升(狀態D)。然後，和霜一樣變成0℃，直到霜完全融掉為止，冷卻器54全體的溫度都保持在0℃(狀態E)。如上述，在冷卻器54的結霜量少的第2結霜狀態中，空氣排出口側的冷卻器54之上端側的結霜量少於作為空氣流入口側的冷卻器54之下端側的結霜量。因此，在冷卻器54的下端附近的霜完全融掉之前，冷卻器54的上端附近的霜就完全融掉了，且冷卻器54的上端附近的溫度上升(狀態F2)。 In the refrigerator 100 according to the first embodiment, the temperature change of the cooler 54 during the defrosting operation is basically the same as in the past. That is, when the defrosting operation is started and the cooler 54 is heated by the radiant heater 11, the temperature of the entire cooler 54 gradually increases (state D). Then, it becomes 0 ° C like the frost, and the temperature of the entire cooler 54 is maintained at 0 ° C (state E) until the frost is completely melted. As described above, in the second frosting state where the frost amount of the cooler 54 is small, the frost amount on the upper end side of the cooler 54 on the air outlet side is smaller than that on the lower end side of the cooler 54 as the air inlet side. The amount of frost. Therefore, before the frost near the lower end of the cooler 54 is completely melted, the frost near the upper end of the cooler 54 is completely melted, and the temperature near the upper end of the cooler 54 rises (state F2).

此時，本實施形態1的冰箱100，在冷卻器54的結霜量少的第2結霜狀態中的第2除霜運轉中，使輻射加熱器11的加熱容量變小。因此，在結霜量多於上端附近的下端附近的溫度尚未開始上升的狀態下，冷卻器54的上端附近的溫度上升變得平緩。因此，本實施形態1的冰箱100，如第6圖中的Tb所示，能夠抑制在除霜運轉結束的時候，冷卻器54的上端附近的溫度上升。亦即，本實施形態1的冰箱100，能夠抑制當恢復到通常運轉時，供給至貯藏室的空氣在冷卻器54的上端側被加熱的情況，並能夠抑制貯藏室內的溫度上升。另外，能夠減少為了要把溫度已經上升的貯藏室內的空氣再度冷卻所必須耗費的電力。 At this time, in the refrigerator 100 of the first embodiment, the heating capacity of the radiant heater 11 is reduced during the second defrosting operation in the second frosting state where the amount of frosting of the cooler 54 is small. Therefore, in a state where the amount of frost formation is higher than the temperature near the lower end, the temperature rise near the upper end of the cooler 54 becomes gentle. Therefore, as shown by Tb in FIG. 6, the refrigerator 100 according to the first embodiment can suppress a temperature rise near the upper end of the cooler 54 when the defrosting operation is completed. That is, the refrigerator 100 according to the first embodiment can prevent the air supplied to the storage compartment from being heated on the upper end side of the cooler 54 when the normal operation is resumed, and can suppress the temperature rise in the storage compartment. In addition, it is possible to reduce the electric power required to cool the air in the storage room whose temperature has risen again.

另外，本實施形態1的冰箱100，在冷卻器54的結霜量多的第1結霜狀態中的第1除霜運轉中，輻射加熱器11的加熱容量變大。因此，本實施形態1的冰箱100能夠防止第1除霜運轉的時間拉長的情況。因此，本實施形態1的冰箱100，即使在第1除霜運轉之後恢復到通常運轉的情況下，也 能夠抑制貯藏室內的溫度上升，能夠降低為了將溫度已上升的貯藏室內的空氣再度冷卻所耗費的電量。 In addition, in the refrigerator 100 of the first embodiment, the heating capacity of the radiant heater 11 is increased during the first defrosting operation in the first frosting state in which the amount of frost of the cooler 54 is large. Therefore, the refrigerator 100 according to the first embodiment can prevent the time for the first defrosting operation from being lengthened. Therefore, even when the refrigerator 100 according to the first embodiment is returned to the normal operation after the first defrosting operation, it is possible to suppress the temperature rise in the storage room, and it is possible to reduce the temperature for cooling the air in the storage room where the temperature has increased. Power consumed.

另外，在冷卻器54的結霜量少的第2結霜狀態中的第2除霜運轉中，可以用如後述的方式控制輻射加熱器11的加熱容量。 In addition, in the second defrosting operation in the second frosting state where the amount of frost formation of the cooler 54 is small, the heating capacity of the radiant heater 11 can be controlled as described later.

第7圖為表示在本發明的實施形態1的冰箱終，於結霜量少之狀態的除霜運轉的另一例之圖。 Fig. 7 is a diagram showing another example of the defrosting operation in the refrigerator in Embodiment 1 of the present invention in a state where the amount of frost formation is small.

例如，在冷卻器54的結霜量少的第2結霜狀態中的第2除霜運轉中，在作為空氣排出口側的冷卻器54的上端附近的霜完全融掉之前，可以使輻射加熱器11的加熱容量大於第2容量。例如，可以使輻射加熱器11的加熱容量為定格容量的100%。然後，之後再將輻射加熱器11的加熱容量降低，可以使其為第2容量。例如，可以使輻射加熱器11的加熱容量為定格容量的50%。像這樣控制輻射加熱器11的加熱容量，能夠縮短第2除霜運轉的時間，並能夠抑制在第2除霜運轉的時候，貯藏室內的溫度上升的情況。 For example, in the second defrosting operation in the second frosting state where the frost amount of the cooler 54 is small, the radiant heating may be performed before the frost near the upper end of the cooler 54 as the air discharge port side is completely melted. The heating capacity of the heater 11 is larger than the second capacity. For example, the heating capacity of the radiant heater 11 may be set to 100% of the freeze capacity. After that, the heating capacity of the radiant heater 11 is reduced to make it the second capacity. For example, the heating capacity of the radiant heater 11 may be set to 50% of the fixed capacity. Controlling the heating capacity of the radiant heater 11 in this way can shorten the time of the second defrosting operation, and can suppress the temperature rise in the storage room during the second defrosting operation.

像這樣控制輻射加熱器11的加熱容量的情況下，在檢出冷卻器54的溫度之溫度感測器34的檢出值低於記憶部64中所記憶的規定值的狀態下，提高輻射加熱器11的加熱容量，當溫度感測器34的檢出值已經提高到規定值以上之後，再降低輻射加熱器11的加熱容量即可。在此，該規定值的溫度為，低於用以判斷除霜運轉結束的規定溫度，並且高於0℃的溫度，例如為1℃。另外，溫度感測器34的檢出值和規定值之比較係由例如控制部61執行。 When the heating capacity of the radiant heater 11 is controlled as described above, the radiant heating is increased in a state where the detection value of the temperature sensor 34 that detects the temperature of the cooler 54 is lower than a predetermined value stored in the storage unit 64. The heating capacity of the heater 11 can be reduced after the detection value of the temperature sensor 34 has been increased to a predetermined value or more. Here, the temperature of the predetermined value is lower than the predetermined temperature for determining the end of the defrosting operation, and is higher than 0 ° C, for example, 1 ° C. The comparison between the detected value and the predetermined value of the temperature sensor 34 is performed by, for example, the control unit 61.

(結霜量判斷) (Frost amount judgment)

如上述的冷卻器54的結霜狀態之判斷係依據例如後述的方式進行。 The determination of the frosting state of the cooler 54 as described above is performed based on, for example, a method described later.

第8圖為表示本發明的實施形態1的冰箱中，輻射加熱器通電時的冷卻器之溫度變化的圖。另外，第9圖為表示本發明的實施形態1的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 Fig. 8 is a diagram showing the temperature change of the cooler when the radiant heater is turned on in the refrigerator according to the first embodiment of the present invention. FIG. 9 is a flowchart showing an example of a method for determining a frost amount of a cooler in the refrigerator according to the first embodiment of the present invention.

冷卻器54的熱容量係由冷卻器54所使用的材質、及該材質的尺寸等而定。另外，有霜附著在冷卻器54上時，冷卻器54的熱容量是結合了霜熱容量的值。因此，依據冷卻器54的熱容量和輻射加熱器11的加熱容量，能夠預測將冷卻器54用輻射加熱器11加熱規定時間t1時，冷卻器54的溫度上升量。亦即，如第8圖所示，將冷卻器54用輻射加熱器11加熱規定時間t1時，結霜量越多則冷卻器54的溫度上升量越小。因此，能夠用此溫度上升量，判斷冷卻器54的結霜量。 The heat capacity of the cooler 54 depends on the material used for the cooler 54 and the size of the material. When frost adheres to the cooler 54, the heat capacity of the cooler 54 is a value that combines the frost heat capacity. Therefore, based on the heat capacity of the cooler 54 and the heating capacity of the radiant heater 11, it is possible to predict the amount of temperature increase of the cooler 54 when the cooler 54 is heated by the radiant heater 11 for a predetermined time t1. That is, as shown in FIG. 8, when the cooler 54 is heated by the radiant heater 11 for a predetermined time t1, the larger the amount of frost, the smaller the temperature increase of the cooler 54 is. Therefore, the amount of frost formation of the cooler 54 can be determined using this temperature increase amount.

在此情況下，判斷部62依據例如第9圖所示的流程，判斷冷卻器54的結霜量。 In this case, the judging unit 62 judges the amount of frost formation of the cooler 54 according to the flow shown in FIG. 9, for example.

從通常運轉切換到除霜運轉(亦即開始除霜運轉)時，判斷部62開始結霜量的判斷(步驟S11)。然後，在步驟S12中，判斷部62，在對輻射加熱器11通電之前，取得溫度感測器34的檢出值T1(亦即冷卻器54的溫度T1)。在步驟S12之後，於步驟S13中，控制部61，對輻射加熱器11通電，開始冷卻器54的加熱。另外，此時的輻射加熱器11的加熱容量為任意。 When the normal operation is switched to the defrosting operation (that is, the defrosting operation is started), the judging unit 62 starts judging the amount of frost formation (step S11). Then, in step S12, the judging unit 62 acquires the detection value T1 of the temperature sensor 34 (that is, the temperature T1 of the cooler 54) before the radiant heater 11 is energized. After step S12, in step S13, the control unit 61 applies power to the radiant heater 11 and starts heating of the cooler 54. The heating capacity of the radiant heater 11 at this time is arbitrary.

步驟S13之後，於步驟S14中，計時部63計測輻 射加熱器11的加熱時間。然後，當計時部63的計測時間到達記憶在記憶部64中的規定時間t1時，在步驟S15中，判斷部62取得溫度感測器34的檢出值T2(亦即冷卻器54的溫度T2)，並算出從T2減去T1後的減算值，作為溫度差△T。之後，在步驟S16中，判斷部62進行比較以判斷溫度差△T是否大於記憶在記憶部64中的第1判斷值。並且，當溫度差△T大於第1判斷值的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量少的第2結霜狀態(步驟S17)。另外，溫度差△T為第1判斷值以下的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量多的第1結霜狀態(步驟S18)。 After step S13, in step S14, the timer 63 measures the heating time of the radiation heater 11. Then, when the measurement time of the timer section 63 reaches the predetermined time t1 stored in the memory section 64, in step S15, the determination section 62 acquires the detection value T2 of the temperature sensor 34 (that is, the temperature T2 of the cooler 54). ) And calculate the subtraction value after subtracting T1 from T2 as the temperature difference ΔT. Thereafter, in step S16, the determination unit 62 performs a comparison to determine whether the temperature difference ΔT is greater than the first determination value stored in the storage unit 64. When the temperature difference ΔT is greater than the first determination value, the determination unit 62 determines that the frosting state of the cooler 54 is the second frosting state with a small amount of frosting (step S17). When the temperature difference ΔT is equal to or less than the first determination value, the determination unit 62 determines that the frosting state of the cooler 54 is the first frosting state with a large amount of frost (step S18).

另外，例如，冷卻器54的結霜狀態之判斷亦可以依據後述方式進行。 In addition, for example, the determination of the frosting state of the cooler 54 may be performed according to the method described later.

第10圖為表示本發明的實施形態1的冰箱中，從除霜運轉結束時起算的運轉時間和冷卻器之結霜量的關係之圖。第11圖為表示本發明的實施形態1的冰箱中，門片開閉次數和冷卻器之結霜量的關係之圖。第12圖為表示本發明的實施形態1的冰箱之一例的側面縱剖面圖。另外，第13圖為表示本發明的實施形態1的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 Fig. 10 is a diagram showing the relationship between the operation time and the amount of frost formation on the cooler in the refrigerator according to the first embodiment of the present invention, which is calculated from the end of the defrost operation. Fig. 11 is a graph showing the relationship between the number of door opening and closing times and the amount of frost on the cooler in the refrigerator according to the first embodiment of the present invention. Fig. 12 is a side vertical sectional view showing an example of a refrigerator according to the first embodiment of the present invention. FIG. 13 is a flowchart showing an example of a method for determining a frost amount of a cooler in the refrigerator according to the first embodiment of the present invention.

除霜運轉結束後，重新開始通常運轉時，如第10圖所示，冷卻器54的結霜量隨著時間經過而呈現例如線性函數增加。另外，當貯藏室的門片被開閉時，冰箱100外部的潮濕空氣流入貯藏室內。因此，如第11圖所示，每當門片被開閉時，冷卻器54的結霜量就呈現階段式的增加。亦即，門片的開閉次 數和冷卻器54的結霜量呈現比例關係。因此，能夠依據前次的除霜運轉到本次的除霜運轉為止的時間、以及該期間內門片被開閉的次數，推定(換言之判斷)冷卻器54的結霜量。 When the normal operation is restarted after the defrosting operation is completed, as shown in FIG. 10, the frosting amount of the cooler 54 increases, for example, as a linear function, as time passes. In addition, when the door of the storage room is opened and closed, the humid air outside the refrigerator 100 flows into the storage room. Therefore, as shown in FIG. 11, each time the door is opened and closed, the frosting amount of the cooler 54 increases stepwise. That is, the number of opening and closing times of the door panel and the frost formation amount of the cooler 54 have a proportional relationship. Therefore, the amount of frost formation on the cooler 54 can be estimated (in other words, judged) based on the time from the previous defrosting operation to the current defrosting operation and the number of times the door flaps were opened and closed during this period.

在此情況下，如第12圖所示，只要在冰箱100設置檢出冷藏室21的門片24的開閉之門片開閉感測器35、檢出冷凍室22的門片25的開閉之門片開閉感測器35、及檢出蔬果室23的門片25的開閉之門片開閉感測器35。然後，判斷部62依據例如第13圖所示之流程，判斷冷卻器54的結霜量即可。 In this case, as shown in FIG. 12, as long as the door 100 opening / closing sensor 35 that detects the opening and closing of the door 24 of the refrigerating compartment 21 is provided in the refrigerator 100, the door opening and closing detection of the door 25 of the freezer compartment 22 is provided. The sheet opening / closing sensor 35 and the door opening / closing sensor 35 which detects the opening / closing of the door sheet 25 of the fruit and vegetable room 23. Then, the judging unit 62 may judge the frost formation amount of the cooler 54 according to the flow shown in FIG. 13, for example.

亦即，判斷部62，當除霜運轉結束時，開始結霜量的判斷(步驟S21)。然後，在步驟S22中，判斷部62依據門片開閉感測器35的檢出值，判斷是否有貯藏室的任何一個門片被開閉。然後，當貯藏室的任何一個門片被開閉的情況下，在步驟S24中，判斷部62，將記憶在記憶部64中的門片開閉次數加上「1」。另外，在除霜運轉開始的時點，門片開閉次數為「0」。 That is, the determination unit 62 starts determination of the amount of frost formation when the defrosting operation is completed (step S21). Then, in step S22, the judging unit 62 judges whether any of the door pieces of the storage room is opened or closed based on the detection value of the door piece opening / closing sensor 35. Then, when any one of the door pieces of the storage room is opened and closed, the determination unit 62 adds “1” to the number of times of opening and closing the door pieces stored in the memory portion 64 in step S24. In addition, when the defrosting operation was started, the number of times of opening and closing the door was "0".

在步驟S23中，計時部63計測從除霜運轉結束之後的經過時間。另外，在步驟S23中，判斷部62取得計時部63所計測得經過時間。然後，在步驟S25中，判斷部62判斷是否要開始除霜運轉。亦即，判斷部62，判斷計時部63所計測得經過時間是否超過記憶部64中所記憶的規定時間。另外，在不開始除霜運轉的情況下，重複執行步驟S22到步驟S25。 In step S23, the timer 63 measures the elapsed time since the end of the defrosting operation. In addition, in step S23, the determination unit 62 obtains the elapsed time measured by the timing unit 63. Then, in step S25, the determination unit 62 determines whether a defrosting operation is to be started. That is, the determination unit 62 determines whether or not the elapsed time measured by the timing unit 63 exceeds a predetermined time stored in the storage unit 64. When the defrost operation is not started, steps S22 to S25 are repeatedly performed.

要開始除霜運轉時，在步驟S26中，判斷部62，依據前次的除霜運轉到本次的除霜運轉為止的時間、以及該期間內門片被開閉的次數，推定冷卻器54的結霜量。另外，第10圖所示的從除霜運轉結束時的經過時間和冷卻器54的結霜 量的關係，以表格或數學式的形式記憶在記憶部64中。另外，第11圖所示的門片開閉次數和冷卻器54的結霜量的關係，以表格或數學式的形式記憶在記憶部64中。判斷部62使用該表格或數學式，推定冷卻器54的結霜量x。 To start the defrosting operation, in step S26, the judging unit 62 estimates the time of the cooler 54 based on the time from the previous defrosting operation to the current defrosting operation and the number of times the door flaps were opened and closed during this period. The amount of frost. The relationship between the elapsed time from the end of the defrosting operation and the frost formation amount of the cooler 54 shown in FIG. 10 is stored in the memory section 64 in the form of a table or a mathematical formula. In addition, the relationship between the number of door opening and closing times and the frosting amount of the cooler 54 shown in FIG. 11 is stored in the memory section 64 in the form of a table or a mathematical formula. The determination unit 62 estimates the frost formation amount x of the cooler 54 using this table or a mathematical formula.

步驟S26之後，在步驟S27中，判斷部62判斷推定出的結霜量x是否大於記憶在記憶部64中的第2判斷值。然後，在結霜量x大於第2判斷值的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量多的第1結霜狀態(步驟S28)。另外，在結霜量x為第2判斷值以下的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量少的第2結霜狀態(步驟S29)。 After step S26, in step S27, the determination unit 62 determines whether the estimated frost formation amount x is greater than the second determination value stored in the storage unit 64. When the frost formation amount x is greater than the second determination value, the determination unit 62 determines that the frost formation state of the cooler 54 is the first frost formation state with a large amount of frost formation (step S28). When the frost formation amount x is equal to or less than the second determination value, the determination unit 62 determines that the frost formation state of the cooler 54 is the second frost formation state with a small amount of frost formation (step S29).

在此，不需要對應所有的門片設置門片開閉感測器35，只要對應於至少1個門片設置即可。相較於對應於所有的門片設置門片開閉感測器35的情況，對應於一部分的門片設置門片開閉感測器35的情況下，冷卻器54的結霜量之推定精度降低，但是因為能夠減少門片開閉感測器35，所以能夠低成本地製造冰箱100。另外，對應於一部分的門片設置門片開閉感測器35的情況下，設置檢出冷藏室21的門片24的開閉之門片開閉感測器35即可。這是因為冷藏室21的門片24是最容易被開閉的門片，因此，冰箱100外部的潮濕空氣最容易流入冷藏室21。亦即，此係因為流入冷藏室21的冰箱100外部的潮濕空氣，最容易使冷卻器54結霜。 Here, the door opening / closing sensors 35 do not need to be provided for all the door pieces, as long as they are provided for at least one door piece. Compared with the case where the door opening / closing sensors 35 are provided for all the door plates, and the case where the door opening / closing sensor 35 is provided for a part of the door plates, the estimation accuracy of the frost amount of the cooler 54 is reduced. However, since the door opening / closing sensor 35 can be reduced, the refrigerator 100 can be manufactured at low cost. In addition, when the door opening / closing sensor 35 is provided corresponding to a part of the door openings, a door opening / closing sensor 35 which detects the opening / closing of the door opening 24 of the refrigerator compartment 21 may be provided. This is because the door piece 24 of the refrigerating compartment 21 is the door piece that can be most easily opened and closed, and therefore, humid air outside the refrigerator 100 most easily flows into the refrigerating compartment 21. That is, this is because the humid air flowing into the outside of the refrigerator 100 of the refrigerating compartment 21 is most likely to cause the cooler 54 to frost.

另外，例如，冷卻器54的結霜狀態的判斷亦可以依據後述方式進行。 In addition, for example, the determination of the frosting state of the cooler 54 may be performed according to the method described later.

第14圖為表示本發明的實施形態1的冰箱的風扇 之P-Q特性(風量-靜壓特性)的圖。第15圖為表示本發明的實施形態1的冰箱之一例的側面縱剖面圖。另外，第16圖為表示本發明的實施形態1的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 Fig. 14 is a diagram showing P-Q characteristics (air volume-static pressure characteristics) of the fan of the refrigerator in the first embodiment of the present invention. Fig. 15 is a side vertical sectional view showing an example of a refrigerator according to the first embodiment of the present invention. FIG. 16 is a flowchart showing an example of a method for determining a frost amount of a cooler in the refrigerator according to the first embodiment of the present invention.

除霜運轉結束後，重新開始通常運轉時，冷卻器54的結霜量隨著時間經過而增加。而且，因為冷卻器54內的風路截面積隨著冷卻器54的結霜量增加而減少，所以如第14圖所示，被風扇10吸引而通過冷卻器54的空氣的通風電阻也從H1增加到H2。另外，輸入風扇10的電流值也增加。因此，使用輸入風扇10的電流值，能夠判斷冷卻器54的結霜量。 After the defrosting operation is completed and the normal operation is restarted, the amount of frost formed on the cooler 54 increases as time passes. Moreover, since the cross-sectional area of the air path in the cooler 54 decreases as the frost amount of the cooler 54 increases, as shown in FIG. 14, the ventilation resistance of the air drawn by the fan 10 and passing through the cooler 54 is also changed from H1 Increase to H2. In addition, the current value of the input fan 10 also increases. Therefore, the amount of frost on the cooler 54 can be determined using the current value of the input fan 10.

在此情況下，如第15圖所示，在冰箱100設置用以檢出輸入到風扇10的電流值之輸入電流檢出感測器36即可。然後，判斷部62依據例如第16圖所示的流程，判斷冷卻器54的結霜量即可。 In this case, as shown in FIG. 15, the refrigerator 100 may be provided with an input current detection sensor 36 for detecting a current value input to the fan 10. Then, the determination unit 62 may determine the amount of frost formation of the cooler 54 according to the flow shown in FIG. 16, for example.

亦即，從通常運轉切換到除霜運轉時，判斷部62開始結霜量的判斷(步驟S31)。然後，在步驟S32中，判斷部62取得輸入電流檢出感測器36的檢出值y，亦即輸入到風扇10的電流值y。之後，在步驟S33中，判斷部62進行比較以判斷電流值y是否大於記憶在記憶部64中的第3判斷值。並且，當電流值y大於第3判斷值的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量多的第1結霜狀態(步驟S34)。另外，電流值y為第3判斷值以下的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量少的第2結霜狀態(步驟S35)。 That is, when switching from the normal operation to the defrosting operation, the determination unit 62 starts determination of the amount of frost formation (step S31). Then, in step S32, the determination unit 62 acquires the detection value y of the input current detection sensor 36, that is, the current value y input to the fan 10. Thereafter, in step S33, the determination unit 62 performs a comparison to determine whether the current value y is greater than the third determination value stored in the storage unit 64. When the current value y is greater than the third determination value, the determination unit 62 determines that the frosting state of the cooler 54 is the first frosting state with a large amount of frost (step S34). When the current value y is equal to or lower than the third determination value, the determination unit 62 determines that the frosting state of the cooler 54 is the second frosting state with a small amount of frosting (step S35).

另外，輸入風扇10的電流值亦依據風扇10的轉 數而變化。另外，風扇10的轉數亦可依據冷卻器54的溫度而可變控制。因此，可以依據風扇10的轉數及冷卻器54的溫度當中的至少一者，改變上記第3判斷值。亦即，可以在記憶部64中事先記憶以風扇10的轉數及冷卻器54的溫度當中的至少一者作為變數以求出上記第3判斷值的公式。 In addition, the value of the current input to the fan 10 also changes depending on the number of revolutions of the fan 10. In addition, the number of revolutions of the fan 10 may be variably controlled in accordance with the temperature of the cooler 54. Therefore, the third determination value described above may be changed in accordance with at least one of the number of revolutions of the fan 10 and the temperature of the cooler 54. That is, it is possible to memorize in advance in the memory portion 64 at least one of the number of revolutions of the fan 10 and the temperature of the cooler 54 as a variable to obtain the formula of the third determination value described above.

另外，存在著風扇10耗電量隨著輸入風扇10的電流值增加而增加的對應關係。因此，可以在冰箱100設置檢出風扇10之耗電量的感測器，比較該感測器的檢出值和第3判斷值，並據以判斷冷卻器54的結霜狀態。 In addition, there is a corresponding relationship that the power consumption of the fan 10 increases as the current value of the input fan 10 increases. Therefore, a refrigerator 100 may be provided with a sensor that detects the power consumption of the fan 10, a detection value of the sensor and a third determination value may be compared, and the frosting state of the cooler 54 may be determined accordingly.

另外，例如，冷卻器54的結霜狀態之判斷亦可以依據後述方式進行。 In addition, for example, the determination of the frosting state of the cooler 54 may be performed according to the method described later.

第17圖為表示本發明的實施形態1的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 Fig. 17 is a flowchart showing an example of a method for determining a frost amount of a cooler in the refrigerator according to the first embodiment of the present invention.

除霜運轉結束後，重新開始通常運轉時，冷卻器54的結霜量隨著時間經過而增加。而且，如上所述，冷卻器54通風電阻也隨著冷卻器54的結霜量增加而增加。另外，隨著冷卻器54的結霜量漸漸增加，因為冷卻器54表面的結霜而使得鰭片效率惡化，冷卻器54的熱交換性能也降低。因此，在冷凍循環回路50中，當冷卻器54的熱交換性能惡化時，冷卻器54的溫度(亦即在冷卻器54內流動的冷媒的蒸發溫度)降低。因此，能夠用冷卻器54的溫度(亦即，溫度感測器34的檢出值)判斷冷卻器54的結霜量。 After the defrosting operation is completed and the normal operation is restarted, the amount of frost formed on the cooler 54 increases as time passes. Moreover, as described above, the ventilation resistance of the cooler 54 also increases as the amount of frost formation of the cooler 54 increases. In addition, as the frosting amount of the cooler 54 gradually increases, the fin efficiency is deteriorated due to the frosting on the surface of the cooler 54, and the heat exchange performance of the cooler 54 is also reduced. Therefore, in the refrigeration cycle 50, when the heat exchange performance of the cooler 54 is deteriorated, the temperature of the cooler 54 (that is, the evaporation temperature of the refrigerant flowing in the cooler 54) is reduced. Therefore, the frost amount of the cooler 54 can be judged by the temperature of the cooler 54 (that is, the detection value of the temperature sensor 34).

在此情況下，判斷部62依據例如第17圖所示之流程，判斷冷卻器54的結霜量。 In this case, the judging unit 62 judges the frost formation amount of the cooler 54 according to the flow shown in FIG. 17, for example.

亦即，從通常運轉切換到除霜運轉時，判斷部62開始結霜量的判斷(步驟S41)。然後，在步驟S42中，判斷部62取得溫度感測器34的檢出值T3(亦即，冷卻器54的溫度T3)。之後，在步驟S43中，判斷部62進行比較以判斷檢出值T3是否大於記憶在記憶部64中的第4判斷值。並且，當檢出值T3大於第4判斷值的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量少的第2結霜狀態(步驟S44)。另外，檢出值T3為第4判斷值以下的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量多的第1結霜狀態(步驟S45)。 That is, when switching from the normal operation to the defrosting operation, the determination unit 62 starts determination of the amount of frost formation (step S41). Then, in step S42, the determination unit 62 acquires the detection value T3 of the temperature sensor 34 (that is, the temperature T3 of the cooler 54). Thereafter, in step S43, the determination unit 62 performs a comparison to determine whether the detection value T3 is greater than the fourth determination value stored in the storage unit 64. When the detected value T3 is greater than the fourth determination value, the determination unit 62 determines that the frosting state of the cooler 54 is the second frosting state with a small amount of frosting (step S44). When the detected value T3 is equal to or lower than the fourth determination value, the determination unit 62 determines that the frosting state of the cooler 54 is the first frosting state with a large amount of frost (step S45).

另外，在冷卻器54結霜前的狀態下，改變壓縮機51的轉數，則冷卻器54的溫度(亦即在冷卻器54內流動的冷媒的蒸發溫度)產生變化。另外，在冷卻器54內流動的冷媒的蒸發溫度有時會依據冷凍室22的設定溫度而改變。因此，可以依據壓縮機51的轉數及冷凍室22的設定溫度當中的至少一者改變上記第4判斷值。亦即，可以在記憶部64中事先記憶以壓縮機51的轉數及冷凍室22的設定溫度當中的至少一者為變數以求出上記第4判斷值的公式。 In addition, when the number of revolutions of the compressor 51 is changed in a state before the frost of the cooler 54, the temperature of the cooler 54 (that is, the evaporation temperature of the refrigerant flowing in the cooler 54) changes. In addition, the evaporation temperature of the refrigerant flowing in the cooler 54 may change depending on the set temperature of the freezing compartment 22. Therefore, the fourth determination value described above can be changed in accordance with at least one of the number of revolutions of the compressor 51 and the set temperature of the freezing compartment 22. In other words, the memory unit 64 may previously memorize a formula in which at least one of the number of revolutions of the compressor 51 and the set temperature of the freezing chamber 22 is a variable to obtain the fourth determination value described above.

另外，例如，冷卻器54的結霜狀態之判斷亦可以依據後述方式進行。 In addition, for example, the determination of the frosting state of the cooler 54 may be performed according to the method described later.

第18圖為表示本發明的實施形態1的冰箱中，貯藏室內的濕度和冷卻器之結霜量的關係之圖。第19圖為表示本發明的實施形態1的冰箱之一例的側面縱剖面圖。另外，第20圖為表示本發明的實施形態1的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 Fig. 18 is a diagram showing the relationship between the humidity in the storage room and the amount of frost on the cooler in the refrigerator according to the first embodiment of the present invention. Fig. 19 is a side vertical sectional view showing an example of a refrigerator according to the first embodiment of the present invention. FIG. 20 is a flowchart showing an example of a method for determining a frost amount of a cooler in the refrigerator according to the first embodiment of the present invention.

冰箱100的各貯藏室，除了門片開閉時以外，係處於密閉的狀態。因此，冰箱100運轉中的貯藏室內之濕度變化，和冷卻器54的結霜量成比例。詳言之，貯藏室內的濕度越高的狀態，則冷卻器54的結霜量越增加。例如，第18圖所示的J1線表示貯藏室內的濕度低的狀態。另外，第18圖所示的J2線表示貯藏室內的濕度高的狀態。並且，比較將J1線以時間積分而得的積分值和將J2線以同時間積分而得到的積分值，則J2線的積分值大於J1線的積分值。因此，能夠用貯藏室內的濕度之累計值，判斷冷卻器54的結霜量。 Each storage compartment of the refrigerator 100 is hermetically closed except when the door is opened and closed. Therefore, the humidity change in the storage room during the operation of the refrigerator 100 is proportional to the frost amount of the cooler 54. Specifically, the higher the humidity in the storage room, the more the frost formation of the cooler 54 increases. For example, the line J1 shown in FIG. 18 indicates a state where the humidity in the storage room is low. The line J2 shown in FIG. 18 indicates a state where the humidity in the storage room is high. In addition, comparing the integrated value obtained by integrating the J1 line with time and the integrated value obtained by integrating the J2 line with the same time, the integrated value of the J2 line is greater than the integrated value of the J1 line. Therefore, it is possible to determine the amount of frost formation of the cooler 54 using the accumulated value of the humidity in the storage room.

在此情況下，如第19圖所示，可以在冷藏室21設置檢出該冷藏室21的濕度之濕度感測器37。而且，判斷部62依據例如第20圖所示的流程，判斷冷卻器54的結霜量即可。 In this case, as shown in FIG. 19, a humidity sensor 37 that detects the humidity of the refrigerator compartment 21 may be provided in the refrigerator compartment 21. Then, the determination unit 62 may determine the amount of frost formation of the cooler 54 according to the flow shown in FIG. 20, for example.

亦即，判斷部62，當除霜運轉結束時，開始結霜量的判斷(步驟S51)。然後，在步驟S52中，判斷部62取得濕度感測器37的檢出值，算出該檢出值的累計值K。步驟S52之後，在步驟S53中，計時部63計測從除霜運轉結束之後的經過時間。另外，在步驟S53中，判斷部62取得計時部63所計測得經過時間。然後，步驟S54中，判斷部62判斷是否要開始除霜運轉。亦即，判斷部62，判斷計時部63所計測得經過時間是否超過記憶部64中所記憶的規定時間。另外，在不開始除霜運轉的情況下，重複執行步驟S52到步驟S54。亦即，判斷部62，繼續進行濕度感測器37的檢出值之累計，並持續更新累計值K。另外，該累計值K係記憶在例如記憶部64中。 That is, the determination unit 62 starts determination of the amount of frost formation when the defrosting operation is completed (step S51). Then, in step S52, the determination unit 62 acquires the detected value of the humidity sensor 37, and calculates the integrated value K of the detected value. After step S52, in step S53, the timer 63 measures the elapsed time since the end of the defrosting operation. In addition, in step S53, the determination unit 62 obtains the elapsed time measured by the timing unit 63. Then, in step S54, the determination unit 62 determines whether a defrosting operation is to be started. That is, the determination unit 62 determines whether or not the elapsed time measured by the timing unit 63 exceeds a predetermined time stored in the storage unit 64. When the defrosting operation is not started, steps S52 to S54 are repeatedly performed. That is, the determination unit 62 continues to accumulate the detected values of the humidity sensor 37 and continuously updates the accumulated value K. The accumulated value K is stored in, for example, the storage unit 64.

要開始除霜運轉時，在步驟S55中，判斷部62比較 前次的除霜運轉到本次的除霜運轉為止的時間中的濕度感測器37之檢出值的累計值K、和記憶在記憶部64中的第5判斷值。然後，在累計值K大於第5判斷值的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量多的第1結霜狀態(步驟S56)。另外，累計值K為第5判斷值以下的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量少的第2結霜狀態(步驟S57)。 To start the defrosting operation, in step S55, the determination unit 62 compares the cumulative value K of the detected value of the humidity sensor 37 during the time from the previous defrosting operation to the current defrosting operation, and the memory The fifth judgment value in the memory section 64. When the accumulated value K is larger than the fifth judgment value, the judgment unit 62 judges that the frosting state of the cooler 54 is the first frosting state with a large amount of frost (step S56). When the accumulated value K is equal to or lower than the fifth determination value, the determination unit 62 determines that the frosting state of the cooler 54 is the second frosting state with a small amount of frost (step S57).

在此，第19圖所示的濕度感測器37的設置位置僅為一例。只要空氣的溫度在0℃以上就容易檢出濕度，因此，也可以將濕度感測器37設置在例如蔬果室23中。另外，例如，也可以在所有的的貯藏室中都設置濕度感測器37。以提高冷卻器54的結霜量的推定精度。 Here, the installation position of the humidity sensor 37 shown in FIG. 19 is only an example. As long as the temperature of the air is above 0 ° C., humidity can be easily detected. Therefore, the humidity sensor 37 may be provided in the fruit and vegetable room 23, for example. In addition, for example, the humidity sensor 37 may be provided in all the storage rooms. In order to improve the estimation accuracy of the frost amount of the cooler 54.

實施形態2 Embodiment 2

在實施形態1中，使用藉由輻射熱加熱冷卻器54全體的輻射加熱器11，以進行冷卻器54的除霜。但是，用於進行冷卻器54的除霜之加熱器，不限定於輻射加熱器11。例如，可以在冰箱100設置和冷卻器54接觸的接觸型加熱器，與輻射加熱器11並存，或者取代輻射加熱器11。在此情況下，使用上述的結霜量判斷方法判斷冷卻器54的結霜量即可。並且，在冷卻器54的結霜量多的第1結霜狀態下的第1除霜運轉中，使接觸型加熱器的加熱容量(亦即第1容量)增加到例如定格容量的100%等即可。另外，在冷卻器54的結霜量少的第2結霜狀態下的第2除霜運轉中，使接觸型加熱器的加熱容量(亦即第2容量)減少到例如定格容量的50%等即可。藉此，如實施形態1中所說明的，在第1結霜狀態及第2結霜狀態都能夠抑 制貯藏室內的溫度上升，並能夠減少為了將溫度已經上升的貯藏室內的空氣再度冷卻的耗電量。 In Embodiment 1, the radiant heater 11 that heats the entire cooler 54 by radiant heat is used to perform defrosting of the cooler 54. However, the heater for defrosting the cooler 54 is not limited to the radiant heater 11. For example, a contact heater which is in contact with the cooler 54 may be provided in the refrigerator 100, and may coexist with the radiant heater 11, or may replace the radiant heater 11. In this case, the frost amount of the cooler 54 may be determined using the above-mentioned frost amount determination method. In the first defrosting operation in the first frosting state where the amount of frost on the cooler 54 is large, the heating capacity of the contact heater (that is, the first capacity) is increased to, for example, 100% of the rated capacity. Just fine. In addition, in the second defrosting operation in the second frosting state where the amount of frost on the cooler 54 is small, the heating capacity (ie, the second capacity) of the contact heater is reduced to, for example, 50% of the rated capacity. Just fine. As a result, as described in the first embodiment, the temperature rise in the storage room can be suppressed in both the first frosting state and the second frosting state, and the consumption for cooling the air in the storage room whose temperature has risen can be reduced. Battery.

另外，在冰箱100設置接觸型加熱器的情況下，亦可用如後述的方法判斷冷卻器54的結霜量。另外，本實施形態2中未記載的構成係與實施形態1相同，對於與實施形態1相同的構成係標示以與實施形態1相同的符號。 When a contact heater is provided in the refrigerator 100, the amount of frost formation on the cooler 54 may be determined by a method described later. The components not described in the second embodiment are the same as those in the first embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment.

第21圖為表示本發明的實施形態2的冰箱之一例的側面縱剖面圖。第22圖為表示本發明的實施形態2的冰箱的風路內之立體圖。另外，第23圖為表示本發明的實施形態2的冰箱中，冷卻器的結霜量判斷方法之一例的流程圖。 Fig. 21 is a side vertical sectional view showing an example of a refrigerator according to a second embodiment of the present invention. Fig. 22 is a perspective view showing an inside of an air passage of a refrigerator according to a second embodiment of the present invention. FIG. 23 is a flowchart showing an example of a method for determining a frost amount of a cooler in a refrigerator according to a second embodiment of the present invention.

如第21圖及第22圖所示，本實施形態2的冰箱100，具備設置為與冷卻器54接觸的接觸型加熱器12，取代輻射加熱器11。另外，在此接觸型加熱器12設置用以檢出該接觸型加熱器12的溫度之溫度感測器38。 As shown in FIGS. 21 and 22, the refrigerator 100 according to the second embodiment includes a contact heater 12 provided in contact with the cooler 54 instead of the radiant heater 11. The contact heater 12 is provided with a temperature sensor 38 for detecting the temperature of the contact heater 12.

在此，溫度感測器38相當於本發明的第2溫度感測器。 Here, the temperature sensor 38 corresponds to a second temperature sensor of the present invention.

在如此構成的冰箱100中，在除霜運轉的時候，用接觸型加熱器12直接加熱冷卻器54，進行冷卻器54的除霜。在此，接觸型加熱器12和冷卻器54接觸，所以被附著在冷卻器54上的霜冷卻。因此，除霜運轉時，對接觸型加熱器12通電，在經過了規定時間t1後，冷卻器54的結霜量越多，則接觸型加熱器12的溫度上升量越小。因此，能夠用此溫度上升量，判斷冷卻器54的結霜量。 In the refrigerator 100 configured as described above, during the defrosting operation, the cooler 54 is directly heated by the contact heater 12 to perform defrosting of the cooler 54. Here, since the contact heater 12 is in contact with the cooler 54, it is cooled by the frost attached to the cooler 54. Therefore, during the defrosting operation, the contact heater 12 is energized, and after a predetermined time t1 has elapsed, the larger the amount of frost on the cooler 54 is, the smaller the temperature increase of the contact heater 12 is. Therefore, the amount of frost formation of the cooler 54 can be determined using this temperature increase amount.

在此情況下，判斷部62依據例如第23圖所示的流程，判斷冷卻器54的結霜量。 In this case, the judging unit 62 judges the frost formation amount of the cooler 54 according to the flow shown in FIG. 23, for example.

從通常運轉切換到除霜運轉(亦即開始除霜運轉)時，判斷部62開始結霜量的判斷(步驟S61)。然後，在步驟S62中，判斷部62，在對接觸型加熱器12通電之前，取得溫度感測器38的檢出值T4(亦即，接觸型加熱器12的溫度T4)。步驟S62之後，在步驟S63中，控制部61，對接觸型加熱器12通電，開始冷卻器54的加熱。另外，此時的接觸型加熱器12的加熱容量為任意。 When the normal operation is switched to the defrosting operation (that is, the defrosting operation is started), the judging unit 62 starts judging the amount of frost formation (step S61). Then, in step S62, the judging unit 62 acquires the detection value T4 of the temperature sensor 38 (that is, the temperature T4 of the contact heater 12) before the contact heater 12 is energized. After step S62, in step S63, the control unit 61 applies current to the contact heater 12 and starts heating of the cooler 54. The heating capacity of the contact heater 12 at this time is arbitrary.

步驟S63之後，於步驟S64中，計時部63計測接觸型加熱器12的加熱時間。然後，當計時部63的計測時間到達記憶在記憶部64中的規定時間t1時，在步驟S65中，判斷部62取得溫度感測器38的檢出值T5(亦即接觸型加熱器12的溫度T5)，並算出從T5減去T4後的減算值，作為溫度差△T。之後，在步驟S66中，判斷部62進行比較以判斷溫度差△T是否大於記憶在記憶部64中的第6判斷值。並且，溫度差△T大於第6判斷值的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量少的第2結霜狀態(步驟S67)。另外，溫度差△T為第6判斷值以下的情況下，判斷部62判斷冷卻器54的結霜狀態為結霜量多的第1結霜狀態(步驟S68)。 After step S63, in step S64, the timer 63 measures the heating time of the contact heater 12. Then, when the measurement time of the timer section 63 reaches the predetermined time t1 stored in the memory section 64, in step S65, the determination section 62 obtains the detection value T5 of the temperature sensor 38 (that is, the contact heater 12). Temperature T5), and a subtraction value obtained by subtracting T4 from T5 is calculated as a temperature difference ΔT. Thereafter, in step S66, the determination unit 62 performs a comparison to determine whether the temperature difference ΔT is greater than the sixth determination value stored in the storage unit 64. When the temperature difference ΔT is greater than the sixth determination value, the determination unit 62 determines that the frosting state of the cooler 54 is the second frosting state with a small amount of frosting (step S67). When the temperature difference ΔT is equal to or less than the sixth determination value, the determination unit 62 determines that the frosting state of the cooler 54 is the first frosting state with a large amount of frost (step S68).

以上，在上述實施形態1及實施形態2中，係使用1個判斷值來判斷冷卻器54的結霜量。而且，如第24圖所示，以該判斷值作為基準，當結霜量多於該判斷值的時候，增加加熱器的加熱容量，當結霜量小於該判斷值的時候，減少加熱器的加熱容量。但是，本發明中冷卻器54的結霜量之判斷方法，並不限定於此種方法。 As described above, in the first embodiment and the second embodiment, the frost formation amount of the cooler 54 is determined using one determination value. Moreover, as shown in FIG. 24, using this judgment value as a reference, when the frost amount is more than the judgment value, increase the heating capacity of the heater, and when the frost amount is less than the judgment value, reduce the heater's Heating capacity. However, the method for determining the frost amount of the cooler 54 in the present invention is not limited to this method.

例如，如第25圖所示，可以使用複數個判斷值來判斷冷卻器54的結霜量。亦即，以各判斷值為界，當結霜量多於判斷值時，將加熱器的加熱容量增加，當結霜量小於該判斷值時，將加熱器的加熱容量減少。能夠依據冷卻器54的結霜量，使得加熱器的加熱容量為更適當的值。亦即，能夠進一步抑制貯藏室變溫暖的情況發生，另外，能夠進一步縮短除霜時間。在此情況下，在各判斷值中，結霜量多於判斷值的狀態相當於本發明的第1結霜狀態，結霜量小於判斷值的狀態相當於本發明的第2結霜狀態。 For example, as shown in FIG. 25, the frost amount of the cooler 54 may be determined using a plurality of determination values. That is, the boundaries of each judgment value are used to increase the heating capacity of the heater when the amount of frost is greater than the judgment value, and to decrease the heating capacity of the heater when the amount of frost is less than the judgment value. The heating capacity of the heater can be set to a more appropriate value depending on the amount of frost formed on the cooler 54. That is, it is possible to further suppress the warming of the storage room, and further reduce the defrosting time. In this case, among the judgment values, a state where the frost amount is more than the judgment value corresponds to the first frost state of the present invention, and a state where the frost amount is less than the judgment value corresponds to the second frost state of the present invention.

另外，在冷卻器54的結霜量判斷中，和各判斷值相比較的各值係如上述，和冷卻器54的結霜量呈現比例關係。因此，例如第26圖所示，可以使加熱器的加熱容量對應於結霜量(亦即，在冷卻器54的結霜量之判斷中，與各判斷值相比較的各值)而連續地變化。換言之，結霜量越少，可以使得加熱器的加熱容量越小。在此情況下，以任意的結霜量狀態作為本發明的第1結霜狀態時，結霜量少於該狀態的狀態即為本發明的第2結霜狀態。 In addition, in the determination of the frost amount of the cooler 54, each value compared with each determination value is as described above, and there is a proportional relationship with the frost amount of the cooler 54. Therefore, for example, as shown in FIG. 26, the heating capacity of the heater can be continuously made to correspond to the amount of frost formation (that is, each value compared with each determination value in the determination of the amount of frost formation of the cooler 54). Variety. In other words, the smaller the amount of frost, the smaller the heating capacity of the heater can be. In this case, when an arbitrary frost formation state is used as the first frost formation state of the present invention, a state where the frost formation amount is less than this state is the second frost formation state of the present invention.

另外，實施形態1及實施形態2中所示的冷卻器54的結霜量判斷方法，並非只能一個一個單獨實施，也可以同時實施複數個結霜量判斷方法。能夠更正確地判斷冷卻器54的結霜量。 In addition, the frost amount judgment methods of the cooler 54 shown in the first and second embodiments are not limited to one by one, and a plurality of frost amount judgment methods may be implemented simultaneously. The amount of frost formation of the cooler 54 can be determined more accurately.

Claims (11)

一種冰箱，其包括：貯藏室；與該貯藏室連通的風路；冷卻器，其設置於該風路上，冷卻在上述風路中流動的空氣；加熱器，其加熱上述冷卻器，並於上述冷卻器上結霜的第1結霜狀態中使得加熱容量為第1容量，在上述冷卻器的結霜少於上述第1結霜狀態的第2結霜狀態中使得加熱容量為第2容量；第1溫度感測器，其檢出上述冷卻器的溫度；其中上述加熱器，當上述第1溫度感測器的檢出值大於第4判斷值，則以上述第2容量加熱上述冷卻器，當上述第1溫度感測器的檢出值為上述第4判斷值以下，則以上述第1容量加熱上述冷卻器；上述第2容量小於上述第1容量。     A refrigerator includes: a storage room; an air path communicating with the storage room; a cooler provided on the air path to cool air flowing in the air path; and a heater for heating the cooler, and In the first frosted state on the cooler, the heating capacity is set to the first capacity, and in the second frosted state where the frost on the cooler is less than the first frosted state, the heating capacity is set to the second capacity; A first temperature sensor that detects the temperature of the cooler; wherein the heater, when the detected value of the first temperature sensor is greater than a fourth judgment value, heats the cooler with the second capacity, When the detection value of the first temperature sensor is equal to or less than the fourth judgment value, the cooler is heated with the first capacity; the second capacity is smaller than the first capacity.     如申請專利範圍第1項所記載的冰箱，其中：在上述第2結霜狀態中，上述冷卻器的溫度低於規定值的狀態下，使上述加熱器的加熱容量大於上述第2容量；上述冷卻器的溫度已變為上述規定值以上時，使上述加熱器的加熱容量為上述第2容量。     The refrigerator according to item 1 of the scope of patent application, wherein: in the second frosting state, when the temperature of the cooler is lower than a predetermined value, the heating capacity of the heater is greater than the second capacity; When the temperature of the cooler has reached the predetermined value or more, the heating capacity of the heater is set to the second capacity.     如申請專利範圍第1或2項所記載的冰箱，其包括：具有電阻體的第1配線部； 第2配線部，其構成為較該第1配線部低電阻，並在上述加熱器和電源之間與上述第1配線部並聯連接；開關，其切換為上述電源、上述第1配線部及上述加熱器連接而成的封閉電路、或者上述電源、上述第2配線部及上述加熱器連接而成的封閉電路。     The refrigerator according to item 1 or 2 of the patent application scope includes: a first wiring portion having a resistor; and a second wiring portion configured to have lower resistance than the first wiring portion, and is provided between the heater and the power supply. The switch is connected in parallel to the first wiring portion, and the switch is switched to a closed circuit in which the power source, the first wiring portion, and the heater are connected, or the power source, the second wiring portion, and the heater are connected to each other. Into a closed circuit.     如申請專利範圍第1或2項所記載的冰箱，其包括：開關，其切換為第1電源和上述加熱器連接而成的封閉電路、或者提供之電壓與上述第1電源不同的第2電源和上述加熱器連接而成的封閉電路。     The refrigerator according to item 1 or 2 of the patent application scope includes a switch that switches to a closed circuit in which the first power source and the heater are connected, or a second power source that provides a voltage different from the first power source. A closed circuit connected to the heater.     如申請專利範圍第1或2項所記載的冰箱，其中：除霜運轉開始時，上述加熱器，當從上述第1溫度感測器在對上述加熱器通電後已經過規定時間時的檢出值減去上述第1溫度感測器在對上述加熱器通電之前的檢出值得到的差值，大於第1判斷值，則以上述第2容量加熱上述冷卻器；當該差值為上述第1判斷值以下，則以上述第1容量加熱上述冷卻器。     The refrigerator according to item 1 or 2 of the scope of patent application, wherein: when the defrosting operation starts, the heater is detected from the first temperature sensor when a predetermined time has elapsed after the heater is energized. The difference between the value minus the detection value of the first temperature sensor before the heater is energized is greater than the first judgment value, the cooler is heated with the second capacity; when the difference is the first If the judgment value is 1 or less, the cooler is heated with the first capacity.     如申請專利範圍第1或2項所記載的冰箱，其包括：以可自由開閉的方式蓋住上述貯藏室的開口部之門片；及檢出該門片的開閉之門片開閉感測器；上述加熱器，當依據前次的除霜運轉到本次的除霜運轉之間的期間、以及上述門片在該期間內被開閉的次數所推定的上述冷卻器 的結霜量，在第2判斷值以下，則以上述第2容量加熱上述冷卻器，當其大於上述第2判斷值，則以上述第1容量加熱上述冷卻器。     The refrigerator according to item 1 or 2 of the scope of patent application, comprising: a door piece covering the opening of the storage compartment in a manner that can be opened and closed freely; and a door piece opening and closing sensor that detects the opening and closing of the door piece ; The heater, when the frost formation of the cooler is estimated based on the period between the previous defrosting operation and the current defrosting operation, and the number of times the door is opened and closed during this period, If the judgment value is 2 or less, the cooler is heated with the second capacity, and when it is greater than the second judgment value, the cooler is heated with the first capacity.     如申請專利範圍第1或2項所記載的冰箱，其包括：風扇，其設置於上述風路，將已被上述冷卻器冷卻的空氣吹送到上述貯藏室；檢出輸入上述風扇的電流值、或者上述風扇的耗電量的感測器；上述加熱器，當上述感測器的檢出值為第3判斷值以下，則以上述第2容量加熱上述冷卻器；當上述感測器的檢出值大於上述第3判斷值，則以上述第1容量加熱上述冷卻器。     The refrigerator according to item 1 or 2 of the patent application scope includes a fan provided in the air path and blowing air cooled by the cooler to the storage room; detecting a current value input to the fan, Or the sensor for the power consumption of the fan; for the heater, when the detected value of the sensor is less than the third judgment value, the cooler is heated by the second capacity; when the detected value of the sensor is If the output value is larger than the third judgment value, the cooler is heated with the first capacity.     如申請專利範圍第5到9項中任一項所記載的冰箱，其包括：檢出上述貯藏室之濕度的濕度感測器；上述加熱器，前次的除霜運轉到本次的除霜運轉為止的時間之上述濕度感測器之檢出值的累計值，若在第5判斷值以下，則以上述第2容量加熱上述冷卻器；若大於上述第5判斷值，則以上述第1容量加熱上述冷卻器。     The refrigerator according to any one of claims 5 to 9, including: a humidity sensor that detects the humidity in the storage room; and the heater, the previous defrost operation to the current defrost. If the cumulative value of the detected value of the humidity sensor for the time until the operation is below the fifth judgment value, the cooler is heated with the second capacity; if it is larger than the fifth judgment value, the first The capacity heats the above cooler.     如申請專利範圍第1或2項所記載的冰箱，其中：上述加熱器係為設置為與上述冷卻器接觸的接觸型加熱 器；該冰箱包括檢出該接觸型加熱器之溫度的第2溫度感測器；開始除霜運轉時，上述接觸型加熱器，當從上述第2溫度感測器在對上述接觸型加熱器通電後已經過規定時間時的檢出值減去上述第2溫度感測器在對上述接觸型加熱器通電前的檢出值所得到的差值，大於第6判斷值，則以上述第2容量加熱上述冷卻器；當該差值為上述第6判斷值以下，則以上述第1容量加熱上述冷卻器。     The refrigerator according to item 1 or 2 of the scope of patent application, wherein the heater is a contact heater provided in contact with the cooler; the refrigerator includes a second temperature at which the temperature of the contact heater is detected Sensor; when the defrost operation is started, the contact heater is subtracted from the detection value of the second temperature sensor when a predetermined time has elapsed after the contact heater was energized. If the difference between the value detected by the detector before the contact heater is powered on is greater than the sixth judgment value, the cooler is heated with the second capacity; when the difference is less than the sixth judgment value, The cooler is heated with the first capacity.     一種冰箱，其包括：貯藏室；與該貯藏室連通的風路；冷卻器，其設置於該風路上，冷卻在上述風路中流動的空氣；加熱器，其加熱上述冷卻器，並於上述冷卻器上結霜的第1結霜狀態中使得加熱容量為第1容量，在上述冷卻器的結霜少於上述第1結霜狀態的第2結霜狀態中使得加熱容量為第2容量；濕度感測器，其檢出上述貯藏室的濕度；上述加熱器，前次的除霜運轉到本次的除霜運轉為止的時間之上述濕度感測器之檢出值的累計值，若在第5判斷值以下，則以上述第2容量為加熱容量將上述冷卻器加熱； 若大於上述第5判斷值，則以上述第1容量為加熱容量將上述冷卻器加熱，上述第2容量小於上述第1容量。     A refrigerator includes: a storage room; an air path communicating with the storage room; a cooler provided on the air path to cool air flowing in the air path; and a heater for heating the cooler, and In the first frosted state on the cooler, the heating capacity is set to the first capacity, and in the second frosted state where the frost on the cooler is less than the first frosted state, the heating capacity is set to the second capacity; Humidity sensor, which detects the humidity in the storage room; the heater, the accumulated value of the humidity sensor's value from the last defrosting operation to the current defrosting operation. Below the fifth judgment value, the cooler is heated by using the second capacity as the heating capacity; if it is greater than the fifth judgment value, the cooler is heated by using the first capacity as the heating capacity, and the second capacity is smaller than the above 1st capacity.     一種冰箱，其包括：貯藏室；與該貯藏室連通的風路；冷卻器，其設置於該風路上，冷卻在上述風路中流動的空氣；加熱器，其加熱上述冷卻器，並於上述冷卻器上結霜的第1結霜狀態中使得加熱容量為第1容量，在上述冷卻器的結霜少於上述第1結霜狀態的第2結霜狀態中使得加熱容量為第2容量；第2溫度感測器，其檢出上述加熱器的溫度；其中上述加熱器，係為設置為與上述冷卻器接觸的接觸型加熱器；開始除霜運轉時，當從上述第2溫度感測器在對上述接觸型加熱器通電後已經過規定時間時的檢出值減去上述第2溫度感測器在對上述接觸型加熱器通電前的檢出值所得到的差值，大於第6判斷值，則以上述第2容量為加熱容量將上述冷卻器加熱；當該差值為上述第6判斷值以下，則以上述第1容量為加熱容量將上述冷卻器加熱；上述第2容量小於上述第1容量。     A refrigerator includes: a storage room; an air path communicating with the storage room; a cooler provided on the air path to cool air flowing in the air path; and a heater for heating the cooler, and In the first frosted state on the cooler, the heating capacity is set to the first capacity, and in the second frosted state where the frost on the cooler is less than the first frosted state, the heating capacity is set to the second capacity; A second temperature sensor that detects the temperature of the heater; wherein the heater is a contact heater provided in contact with the cooler; when the defrosting operation is started, the temperature is sensed from the second temperature. The difference between the detection value of the sensor when a predetermined time has elapsed after the contact heater is energized and the detection value obtained by the second temperature sensor before the contact heater is energized is greater than the sixth value. If the judgment value is, the cooler is heated by using the second capacity as the heating capacity; when the difference is less than the sixth judgment value, the cooler is heated by using the first capacity as the heating capacity; the second capacity is less than The first capacity    
TW105136370A 2016-11-09 2016-11-09 Refrigerator TWI642884B (en)

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