JP5262259B2 - refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive refrigerator enabling preservation of frozen food in a freezing compartment and ice making without supercooling of food in a refrigerating compartment even at outside air temperature below freezing by switching operation control of a compressor to fixed time operation control without expensive components such as a temperature compensation sensor and a temperature controller and achieving energy saving by efficient control. <P>SOLUTION: When operation time of the compressor 4 exceeds a set upper limit value, the operation of the compressor 4 controlled by temperature change of a refrigerator interior temperature detection device is switched to optionally predetermined fixed time control. Thus, this enables continuation of cooling operation even at outside air temperature below freezing and decline to temperature allowing preservation of frozen food in the freezing compartment 2 and ice making without supercooling of food in the refrigerating compartment 3. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to control of a compressor of a refrigerator that can be cooled even at an outside air temperature below freezing.

  In recent years, the environment in which refrigerators are used is diverse and the required quality has become severe. Therefore, the inside temperature must be ensured under any use conditions, and at low outside temperatures, the operating rate is increased by the temperature compensation heater to lower the freezer compartment temperature (for example, Patent Documents). 1).

  Hereinafter, the conventional refrigerator will be described with reference to the drawings.

  FIG. 3A is a longitudinal sectional view of a conventional refrigerator 1 described in Patent Document 1. As shown in FIG. FIG. 3B is a chart of the cooling control, and includes a compressor 4, an internal cooling fan motor 5, a temperature compensation heater 7, and a temperature detection device 8.

In the above configuration, the compressor 4 and the internal cooling fan motor 5 are operated and cooled until the internal temperature is lowered to t2 by the temperature detection device 8 installed in the refrigerator compartment 3, and the internal temperature is t1. The compressor 4 and the internal cooling fan motor 5 are stopped until the internal temperature rises, and the operation control for starting the operation is repeated to adjust the internal temperature. Further, the temperature compensation heater 7 is OFF-energized to increase the operating rate even at a low outside air temperature, thereby suppressing the temperature rise of the freezer compartment 2.
JP 2001-50633 A

  However, in the above-described conventional refrigerator, if the temperature compensation heater is energized at a low outside air temperature and the operation rate is increased too much, the temperature of the storage room that does not include a temperature detection device other than the freezer room is overcooled, and warmed and cooled. However, there is a problem that power consumption increases due to inefficient control, and expensive components such as a temperature compensation heater and a temperature control device must be provided, and high-performance products cannot be provided at low cost.

  The present invention solves the above-described conventional problems, and by switching the operation control of the compressor to the constant time operation control without having expensive parts such as a temperature compensation heater and a temperature control device, the outside air temperature below the freezing point However, it is an object of the present invention to provide an inexpensive refrigerator that can store frozen foods in the freezer compartment and make ice without overcooling the food in the refrigerator compartment, achieve energy saving through efficient control, and is inexpensive.

  In order to solve the above conventional problems, the refrigerator of the present invention is optional when the operation of the compressor, which is normally controlled by the temperature change of the internal temperature detection device, exceeds the upper limit value set in the operation time of the compressor. It is characterized by switching to the constant time control defined in (1).

  As a result, the cooling operation can be continued even at the outside air temperature below the freezing point by switching the operation control of the compressor to the constant time operation control without installing expensive components such as a temperature compensation heater, a temperature control device, and an electric damper device. It can be reduced to a temperature where frozen food in the freezer can be stored and iced without overcooling the food in the refrigerator compartment, and because it does not require a heat source, it can be efficiently cooled, saving energy, and component parts Reduced and simple and inexpensive refrigerators can be manufactured.

  The refrigerator of the present invention switches the operation control of the compressor to the constant time operation control without installing expensive control parts, thereby freezing the freezer in the freezer without overcooling the food in the refrigerator compartment even at an outside air temperature below freezing point. It is possible to store food and make ice, and to provide an energy-saving and inexpensive refrigerator.

The present invention relates to a refrigerator including a compressor, an evaporator, a cooling system including an internal cooling fan motor, a refrigerator compartment, a freezer compartment, and a temperature detection device provided in the refrigerator compartment. The operation control of the machine is controlled at an arbitrary fixed time and controlled based on the temperature detection result of the temperature detection device, the refrigerator compartment is located above the freezer compartment, and the evaporator is arranged in the refrigerator compartment. When the compressor stop time exceeds the upper limit, the compressor temperature switching control is switched from the internal temperature operation control to the constant time operation control, and the refrigerator cooling fan motor is By performing delay control that is not synchronous operation control with the compressor, it is possible to switch the operation control of the compressor to the constant time operation control without installing expensive parts such as a temperature compensation heater, a temperature control device, and an electric damper device. In Cooling operation can be continued even at outside air temperatures below the freezing point, and the food in the refrigerator compartment can be lowered to a temperature at which frozen food can be stored and iced without overcooling, and no heat source is required. It can be cooled efficiently and saves energy, and it is possible to manufacture a simple and inexpensive refrigerator with fewer components.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a control chart according to Embodiment 1 of the present invention, FIG. 2 (a) is a vertical sectional view of a refrigerator, FIG. 2 (b) is an enlarged view of a main part of FIG. 2 (a), and FIG. FIG. 2D is a diagram showing a conventional cooling system, and FIG. 2D is a diagram showing the cooling system according to Embodiment 1 of the present invention.

  1 to 2, reference numeral 1 denotes a refrigerator, which is composed of an upper refrigerator compartment 3 and a lower freezer compartment 2.

  An evaporator 6 is installed on the back surface of the freezer compartment 2, and an internal cooling fan motor 5 is arranged above the evaporator 6.

  A temperature detection device 8 is installed on the back side of the refrigerator compartment 3 to control the operation of the compressor 4 and the internal cooling fan motor 5.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the internal temperature of the refrigerator compartment 3 rises and reaches t3, the temperature detector 8 is activated to start the compressor 4. When the compressor 4 is started, the refrigerant circulates in the system, the evaporator 6 is cooled, the internal cooling fan motor 5 is also started, and the cool air discharge air passage 10 of the refrigerator compartment 3 and the cold air discharge air of the freezer compartment 2 are started. Cold air is supplied to the passage 9 to start cooling the freezer compartment 2 and the refrigerator compartment 3. When the internal temperature of the refrigerator compartment 2 decreases and reaches t4, the temperature detecting device 8 operates to stop the compressor 4 and the internal cooling fan motor 5.

  With this control alone, when the outside air temperature is low (below freezing point), the outside air temperature becomes lower than the temperature in the refrigerator compartment 3, so that the inside temperature rises up to t3 even if the compressor 4 and the inside cooling fan motor 5 are stopped. Although it becomes late and the stop time T of the compressor 4 is gradually extended and eventually the compressor 4 becomes inoperative and the frozen food in the freezer compartment 2 is melted, making it impossible to make ice, but the stop time T of the compressor 4 Only when the upper limit time Tmax11 (for example, 60 minutes) that can be arbitrarily set has been exceeded, the compressor 4 and the fan motor 5 for cooling inside the cabinet are forcibly set only during the forced operation time Trun12 (for example, 5 minutes). Therefore, the forced operation control is activated every time the stop time T of the compressor 4 exceeds the upper limit time Tmax11. To ensure a low operation rate.

  The internal cooling fan motor 5 is not synchronized with the operation of the compressor 4 and operates after a delay time Tdel13 (for example, 5 minutes) which can be arbitrarily set. Therefore, the compressor operation is stopped without cooling the refrigerator compartment 3. Since the freezer 2 is located below the freezer 3 and the evaporator 6 is disposed in the freezer 2, the freezer 2 is a fan motor for cooling the inside of the refrigerator. It can be cooled by both intercooling and direct cooling regardless of the operation of No. 5, and since it does not have a heat source such as the temperature compensation heater 7 in the temperature control, it is energy-saving, has fewer parts and is inexpensive and stable in quality. Can also contribute.

  As described above, the refrigerator according to the present invention supercools the food in the refrigerator even at an outside air temperature below freezing by switching the operation control of the compressor to the constant time operation control without installing expensive control parts. It is possible to store frozen foods in the freezer and make ice, and to provide an energy-saving and inexpensive refrigerator, which can be applied to general freezing and refrigeration equipment.

Control chart in the first embodiment of the refrigerator according to the present invention (A) Refrigerator longitudinal cross-sectional view of the first embodiment of the refrigerator according to the present invention (b) Enlarged view of the main part of (a) of FIG. 2 (c) Diagram showing a conventional cooling system (d) Embodiment of the present invention Figure 1 shows the cooling method (A) Vertical sectional view of a conventional refrigerator (b) Control chart of a conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Freezing room 3 Refrigeration room 4 Compressor 5 Fan motor for internal cooling 6 Evaporator 8 Temperature detection device 9 Freezing room cold air discharge air path 10 Refrigeration room cold air discharge air path 11 Compressor stop upper limit time Tmax
12 Compressor forced operation time Trun
13 Internal fan cooling motor delay time Tdel

Claims (3)

In a refrigerator comprising a compressor, an evaporator, a cooling system comprising an internal cooling fan motor , a refrigerator compartment and a freezer compartment, and a temperature detection device provided in the refrigerator compartment ,
The operation control of the compressor is controlled based on the temperature detection result of any controlled between scheduled Rutotomoni said temperature sensing device, the refrigerating chamber is positioned above the freezer compartment, the evaporator is the freezing Shall be placed indoors,
An upper limit is set for the stop time of the compressor, and when the stop time of the compressor exceeds the upper limit, the internal temperature operation control is switched to the constant time operation control, and the refrigerator cooling fan in the refrigerator The refrigerator is characterized in that the motor is subjected to delay control which is not synchronous operation control with the compressor . The refrigerator according to claim 1 , wherein the refrigerator compartment has no heat source such as a heater. The refrigerator according to claim 1 or 2 , wherein the temperature is automatically adjusted without a temperature control device of the refrigerator.

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