JPH10300302A - Ice-making controller of thermoelectric module type electric refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the efficient cooling of a food storage chamber in which the food is stored and an ice-making chamber to make ice at the stable temperature by preventing the temperature rise in the chambers, and eliminating the supercooling. SOLUTION: An applied voltage determining means 53 to determine the voltage V to be applied to a first thermoelectric module 25 to cool chambers according to a temperature difference ΔT between the in-chamber temperature T and the preset temperature Tref so that the applied voltage is high when the temperature difference is large and the applied voltage is low when the temperature difference is small, and the applied voltage is set higher in an ice-making case as compared with a case where no ice is made, is provided, and the inside of the chambers is efficiently cooled at the stable temperature by setting the rise of the applied voltage in an ice-making case to be the voltage value obtained at a cooling surface of the first thermoelectric module 25 to cool the inside of the chambers with the heat absorption agreed with the heat radiation from the heat radiating surface of a second thermoelectric module for ice-making.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice making control device for a thermoelectric modular electric refrigerator that cools the inside of a refrigerator and makes ice using a Peltier device.

[0002]

2. Description of the Related Art A technique using a Peltier element in a refrigeration system is disclosed in Japanese Patent Publication No. 6-504361. This technology uses a heat exchanger in which a cooling water path for forcibly circulating cooling water is thermally coupled to each of the radiating surface and the cooling surface of the Peltier element, and the cooling water path is thermally coupled to the cooling surface of the Peltier element. To cool the target object, or to warm the target object by radiating heat in a heat exchanger interposed in a cooling water path thermally coupled to the heat radiation surface of the Peltier element.

[0003]

However, in order to use the above-mentioned technology in an electric refrigerator, a food storage room for storing food and an ice making room for making ice at a stable temperature in a refrigerator main body. Efficient cooling is required, and there is a problem how to perform control to achieve this.

An object of the present invention is to provide an ice making control device of a thermoelectric module type electric refrigerator capable of efficiently cooling a food storage room for storing food and an ice making room for making ice at a stable temperature. .

[0005]

SUMMARY OF THE INVENTION An ice making control device for a thermoelectric module type electric refrigerator according to the present invention cools the inside of the refrigerator body by heat exchange between a cooling heat exchanger and air inside the refrigerator body. In a thermoelectric module type electric refrigerator that makes ice by absorbing heat on the cooling side of the auxiliary manifold, an ice making switch for setting whether or not to make ice and a second thermoelectric module of the auxiliary manifold when ice making is performed by turning on the ice making switch. Energize with voltage and turn off the ice making switch.
An auxiliary manifold energization control means for interrupting energization of the thermoelectric module, an internal temperature sensor provided in the refrigerator main body, an internal temperature detection means for detecting an internal temperature by the internal temperature sensor, An internal temperature setting means for setting the internal temperature to a predetermined temperature; calculating a temperature difference between an internal temperature detected by the internal temperature detecting means and a predetermined temperature set by the internal temperature setting means. The voltage applied to the first thermoelectric module of the main manifold is increased in accordance with the temperature difference calculated by the temperature difference calculating means and the temperature difference calculated by the temperature difference calculating means. When the voltage is small, the applied voltage is low, and when the ice making switch is turned on, the applied voltage is determined by the applied voltage determining means. According pressure, a configuration in which a main manifold energization control means for energizing the first thermoelectric module of the main manifold.

Further, the applied voltage determining means for determining a voltage to be applied to the first thermoelectric module of the main manifold is set to be higher when ice is made by turning on the ice making switch than when ice is not made. The rise value of the voltage applied to the thermoelectric module is set to a voltage value obtained on the cooling surface of the first thermoelectric module of the main manifold so that the amount of heat absorbed coincides with the heat radiation amount of the heat radiation surface of the second thermoelectric module of the auxiliary manifold. It is characterized by doing.

[0007] According to the present invention, the voltage applied to the first thermoelectric module of the main manifold is increased to increase the amount of heat absorbed on the cooling surface of the first thermoelectric module when ice making is performed. An ice-making chamber for ice making with the inside of the refrigerator by preventing the temperature inside the refrigerator from becoming excessively cool by preventing the temperature of the refrigerator from rising, and by setting the rise in the applied voltage to an appropriate value, thereby eliminating unnecessary power consumption. And can be efficiently cooled at a stable temperature.

[0008]

The first aspect of the present invention is directed to a first heat exchange section thermally coupled to a heat radiation surface of a first thermoelectric module and a second heat exchange section thermally coupled to a cooling surface of the first thermoelectric module. A main manifold having a heat exchange section, an auxiliary manifold having a third heat exchange section thermally coupled to a heat radiation surface of the second thermoelectric module, a first circulation pump, a heat exchanger for heat radiation, and the main manifold; Forming a first circulation path with the first heat exchange section, filling the inside thereof with a liquid to form a heat radiation system, and forming a second circulation pump, a cooling heat exchanger, and a Forming a second circulation path between the heat exchanging section of No. 3 and the second heat exchanging section of the main manifold, filling the inside thereof with a liquid to form a heat absorbing system, and providing a heat exchanger for cooling and a refrigerator main body. Heat exchange with the air inside the refrigerator to cool the refrigerator interior and In the thermoelectric module electric refrigerator ice making endothermic cooling side of the auxiliary manifold, and ice making switch for setting whether to perform ice, ice making switch O
When making ice at N, the second thermoelectric module of the auxiliary manifold is energized at a predetermined voltage, and the ice making switch is turned off.
Auxiliary manifold energization control means for interrupting energization to the second thermoelectric module, an internal temperature sensor provided inside the refrigerator main body, and an internal temperature detecting means for detecting an internal temperature by the internal temperature sensor An internal temperature setting means for setting the internal temperature to a predetermined temperature; a temperature of the internal temperature detected by the internal temperature detecting means; and a temperature of a predetermined temperature set by the internal temperature setting means. A temperature difference calculating means for calculating the difference, and a voltage applied to the first thermoelectric module of the main manifold in accordance with the temperature difference calculated by the temperature difference calculating means. When the temperature difference is small, the applied voltage is low, and when the ice making switch is turned on, the applied voltage is determined to be higher than when ice is not made, and the applied voltage determining means determines the applied voltage. According applied voltage, characterized by comprising a main manifold energization control means for energizing the first thermoelectric module of the main manifold.

According to this configuration, when performing ice making, heat is radiated from the heat radiation surface of the second thermoelectric module of the auxiliary manifold, but the voltage applied to the first thermoelectric module of the main manifold is increased to increase the first temperature. By increasing the amount of heat absorbed on the cooling surface of the thermoelectric module, it is possible to prevent the temperature inside the refrigerator from rising.

According to a second aspect of the present invention, the applied voltage determining means for determining a voltage to be applied to the first thermoelectric module of the main manifold is configured such that when the ice making switch is turned on, ice making is performed in comparison with the case where ice making is not performed. The amount of heat absorbed by the heat dissipation surface of the second thermoelectric module of the auxiliary manifold is set to be higher than the cooling value of the first thermoelectric module of the main manifold. And a voltage value obtained by

According to this configuration, the first method for making ice is performed.
By setting the rise value of the applied voltage of the thermoelectric module to an appropriate value, it is possible to prevent the inside of the refrigerator from being overcooled and to eliminate unnecessary power consumption.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an ice making control device for a thermoelectric module type electric refrigerator according to the present invention will be described below with reference to the drawings.

1 to 11 show an embodiment. 1 and 2
As shown in FIG. 1, the housing of the thermoelectric module type electric refrigerator comprises a refrigerator body 1 and a front door 4 pivotally supported by a shaft 3 so as to open and close a front opening 2 of the refrigerator body. Inside the back plate 5 closing the opening on the back of the refrigerator body 1, a partition wall 6 attached to the refrigerator body 1 at a distance from the back plate 5, and a molding inside the refrigerator attached inside the refrigerator body 1. A heat insulating material 8 is filled between the body 7.

As shown in FIGS. 1, 3 and 4, a heat-radiating heat exchanger 10 is provided below the outer chamber 9 in the outer chamber 9 formed between the back plate 5 and the partition wall 6. Main manifold 11 is disposed. FIG. 5 shows the upper part of the heat exchanger 10 for heat radiation.
The fan motor 13a,
13b is attached. Fan motor 13a, 1
3b, the first circulation pump 14
a is attached.

A lower grille 15 having a suction port 15a is attached to the bottom of the outside chamber 9, and an upper grill 16 having a discharge port 16a is attached to the upper opening of the outside chamber 9. I have. By operation of the fan motors 13a and 13b, the outside room 9
Is passed through the space between the fins of the heat-dissipating heat exchanger 10 and is discharged from the outlet 16a of the upper grill 16 to the outside.

The interior 17 formed inside the interior molding 7
A cooling heat exchanger 20 and a second circulating pump 14b are located above the cooling heat exchanger 20 in a mechanical chamber 19 between the partition and the partition 18 attached to the molded article 7 in the refrigerator. Is attached. A fan motor 13c is attached to an upper portion of the partition wall 18, and a suction port 21 is provided to a lower portion of the partition wall 18.
Are drilled. The air in the refrigerator 17 is the fan motor 1
By the operation of 3c, the fins 20 of the cooling heat exchanger 20 are sucked from the suction port 21 of the partition 18 into the mechanical chamber 19 in the refrigerator.
a and is discharged from the fan motor 13c to the inside 17 of the refrigerator and circulates.

As shown in FIGS. 1 and 4, an ice making chamber 22 is provided at a part of the upper part of the refrigerator compartment 17, and an auxiliary manifold 24 described later is attached to the back of the ice making plate 23.

As shown in FIG. 6, the main manifold 11 has a Peltier device 25 as a first thermoelectric module.
And a first heat exchange part 26a thermally coupled to the heat radiation surface of the Peltier element 25 and a second heat exchange part 26b thermally coupled to the cooling surface of the Peltier element 25. When the cooling water is sent from one end 27a of the first heat exchange unit 26a, the cooling water whose temperature has risen by absorbing the heat of the heat radiation surface of the Peltier element 25 flows out from the other end 27b of the first heat exchange unit 26a. When cooling water is supplied from one end 28a of the second heat exchange unit 26b, heat of the cooling surface of the Peltier element 25 is radiated, and the cooling water whose temperature has decreased flows out from the other end 28b of the second heat exchange unit 26b. Have been.

The auxiliary manifold 24 also has a Peltier element 29 as a second thermoelectric module and a third heat exchange section 30 thermally coupled to a heat radiation surface of the Peltier element 29, similarly to the main manifold. . Peltier device 29
The ice making plate 23 is in contact with the cooling surface of the above and is thermally coupled.

The first circulation path of the heat radiation system for circulating the cooling water between the first circulation pump 14a, the heat radiation heat exchanger 10, and the first heat exchange part 26a of the main manifold 11 is shown in FIG.
It is configured as shown in FIG.

The discharge port 31 of the first circulation pump 14a and one end 27a of the first heat exchange section 26a of the main manifold 11
Is connected by a first connection pipe 32a, and between the other end 27b of the first heat exchange portion 26a of the main manifold 11 and one end of the heat exchanger 10 for heat radiation, a T-shaped joint 33a is provided in the middle. They are connected by interposed second and third connection pipes 32b and 32c. The remaining connection port 34 of the T-shaped joint 33a is finally closed with a cap.

A fourth connection pipe 32d is provided between the other end of the heat radiation heat exchanger 10 and the suction port 35 of the first circulation pump 14a.
And T-shaped joint 33b. T type joint 3
Finally, a first air reservoir 37a that can extend and contract over the solid line position and the imaginary line position is attached to the remaining connection port 36 of 3b as shown in FIG.

The second circulation path of the heat absorption system for circulating the cooling water between the second circulation pump 14b, the cooling heat exchanger 20, and the second heat exchange section 26b of the main manifold 11 is shown in FIG.
It is configured as shown in FIG.

The discharge port 38 of the second circulation pump 14b and one end 28a of the second heat exchange section 26b of the main manifold 11
Is connected by a fifth connection pipe 32e, and between the other end 28b of the second heat exchange portion 26b of the main manifold 11 and one end of the cooling heat exchanger 20, a T-shaped joint 33c is provided in the middle. They are connected by interposed sixth and seventh connection pipes 32f and 32g. The remaining connection port 39 of the T-shaped joint 33c is finally closed with a cap.

The other end of the cooling heat exchanger 20 and one end of the third heat exchange part 30 of the auxiliary manifold 24 are connected by an eighth connection pipe 32h, and the third heat exchange part of the auxiliary manifold 24 is connected. The other end of 30 and the suction port 40 of the second circulation pump 14b are connected via a ninth connection pipe 32i and a T-shaped joint 33d. Finally, a second air reservoir 37b similar to the first air reservoir 37a is attached to the remaining connection port 41 of the T-shaped joint 33d.

Although not shown, the main manifold 11 is actually covered with a heat insulating material.

Since the first and second circulation paths are formed and filled with cooling water, specifically, a mixture of propylene glycol and water as the cooling water, the main manifold 11 and the auxiliary manifold 24 are filled. Peltier device 2
5 and 29, the first and second circulating pumps 14a and 14b are operated, and the fan motors 13a and 13
When the b and 13c are operated, the heat generated on the heat radiation surface of the Peltier element 25 is transferred to the first heat exchange section 2 of the main manifold 11.
The cooling water flows from the upper side to the lower side as shown by the arrow A in FIGS. 3 and 7, the heated cooling water radiates heat when passing through the heat radiating heat exchanger 10, and the temperature of the cooling water decreases. A heat radiation cycle circulating through the first heat exchange part 26a of the main manifold 11 is formed, and the airflow B1 sucked from the lower grill 15 and the heat generated on the heat radiation surface of the Peltier element 25 are converted into heat radiation heat exchangers 10. The airflow B2 warmed by the heat exchange in the above is discharged from the upper grill 16 to the outside air.

The second heat exchange section 26 of the main manifold 11
The cooling water flows from the lower side to the upper side as shown by arrow C in FIG. 3 and FIG. 8, and the cooling water cooled by the cooling surface of the Peltier element 29 and having its temperature lowered passes through the cooling heat exchanger 20. When passing, the heat exchange with the circulating air flow D in the interior 17
When the cooling water further passes through the third heat exchange section 30 of the auxiliary manifold 24, the cooling water exchanges heat with the heat radiation surface of the Peltier element 29 and the temperature rises, so that the second heat exchange of the main manifold 11 is performed. An endothermic cycle circulating in section 26b is formed.

Here, the cooling water flows in the first heat exchange section 26a and the second heat exchange section 26b of the main manifold 11 so as to face each other, so that the cooling water flows in parallel. The maximum value of the temperature difference between the heat dissipation surface and the heat absorption surface of the Peltier device 29 can be reduced as compared with
Since the distortion of the Peltier device 25 due to heat can be reduced, the durability of the Peltier device 25 can be improved.

The temperatures of the above-mentioned heat radiation cycle and heat absorption cycle are as follows.
° C, the main manifold 11
The temperature of the cooling water on the inlet side (one end 27a) of the first heat exchange unit 26a was 36 ° C., and the temperature of the cooling water on the outlet side (the other end 27b) of the first heat exchange unit 26a was 39 ° C. . The inlet side (one end 28) of the second heat exchange section 26b of the main manifold 11
a) the temperature of the cooling water is −3 ° C., the temperature of the cooling water at the outlet side (the other end 28b) of the second heat exchange unit 26b is 0 ° C., and the outlet side of the third heat exchange unit 30 of the auxiliary manifold 24 Of the cooling water was + 2 ° C. At this time, the surface of the ice making plate 23 became −10 ° C., and ice making was possible.

In the thermoelectric module type electric refrigerator of the present invention, an auxiliary manifold 24 is provided in the interior 17 separately from the main manifold 11, and the heat radiating surface of the auxiliary manifold 24 exchanges heat with the cooling water of the heat absorption cycle. As a result, the ice making plate 23 was sufficiently cooled. FIG. 9 shows details in the vicinity of the auxiliary manifold 24 and the ice making plate 23. A concave portion 44 is formed on the upper surface of the aluminum ice making plate 23 so as to store an ice tray 43 or to accumulate wastewater generated when a defrosting operation is performed. 4
5 is a heat insulating material.

In FIG. 6, reference numeral 47 denotes an ice making switch for setting whether or not to make ice. Reference numeral 48 denotes an auxiliary manifold energization control unit that energizes the second thermoelectric module 29 of the auxiliary manifold 24 at a predetermined voltage when the ice making switch 47 is ON to perform ice making.
The FF controls the second thermoelectric module 29 to cut off the power supply.

Reference numeral 49 denotes a refrigerator temperature sensor provided inside the refrigerator main body. Reference numeral 50 denotes an inside temperature detecting means for detecting the inside temperature by the inside temperature sensor 49. Reference numeral 51 denotes an internal temperature setting unit that sets the internal temperature to a predetermined temperature.
52 is a temperature difference calculating means for calculating a temperature difference between the inside temperature detected by the inside temperature detecting means 50 and the predetermined temperature set by the inside temperature setting means 51.

Numeral 53 denotes an applied voltage determining means for applying a voltage to be applied to the first thermoelectric module 25 of the main manifold 11 in accordance with the temperature difference calculated by the temperature difference calculating means 52 when the temperature difference is large. When the voltage is high and the temperature difference is small, the applied voltage is low and the ice making switch 47 is ON.
The operation is performed so that the applied voltage is determined to be higher when ice is made than when ice is not made. Reference numeral 54 denotes the main manifold 11 according to the applied voltage determined by the applied voltage determining means 53.
Is a main manifold energization control unit that energizes the first thermoelectric module 25.

The ice making control device of the thermoelectric module type electric refrigerator configured as described above will be described with reference to FIGS.
The operation will be described with reference to FIG.

FIG. 10 is a flowchart for explaining the operation in the embodiment, and FIG. 11 is a characteristic diagram showing the relationship between the applied voltage and the temperature difference in the embodiment.

In FIG. 10, first, the ice making switch 47
Is determined to be ON or OFF (Step 1). When the ice making switch 47 is ON, the auxiliary manifold energization control means 48 controls the second thermoelectric module 2 of the auxiliary manifold 24.
9 is supplied with a predetermined voltage to perform ice making (Step 2). When the ice making switch 47 is OFF, the power supply to the second thermoelectric module 29 is cut off (Step 3).

Next, the inside temperature detecting means 50 detects the inside temperature T by the inside temperature sensor 49 (Step 4).
Then, the temperature difference calculating means 52 calculates a temperature difference ΔT (= T−Tref) between the inside temperature T and the predetermined temperature Tref set by the inside temperature setting means 51 (Step).
5).

Next, as shown in FIG. 11A, the applied voltage determining means 53 adjusts the first voltage of the main manifold 11 in accordance with the temperature difference ΔT calculated by the temperature difference calculating means 52.
The voltage V applied to the thermoelectric module 25 is determined to be high when the temperature difference is large, and to be low when the temperature difference is small (Step 6). In the present embodiment, when the set temperature Tref is 5 ° C., the applied voltage is 5 V to maintain the set temperature even if the temperature difference ΔT is 0 ° C.
When the temperature is 10 ° C. or higher, the applied voltage is set to the maximum applied voltage of the thermoelectric module of 12 V.

When the ice making switch 47 is ON and ice making is performed, the applied voltage is determined to be higher than when ice making is not performed (Step 7). In the present embodiment, as shown in (b) of FIG. 11, the applied voltage is increased by 1 V when ice is made, as compared with the case where ice is not made.

The main manifold energization control means 54
Energizes the first thermoelectric module 25 of the main manifold 11 in accordance with the applied voltage determined by the applied voltage determining means 53 (Step 8), and returns to Step 1.

Accordingly, in this embodiment, when ice making is performed, the second thermoelectric module 29 of the auxiliary manifold 24 is used.
Heat is radiated from the heat radiating surface of the first manifold, but the voltage applied to the first thermoelectric module 25 of the main manifold 11 is increased to increase the first
By increasing the amount of heat absorbed by the cooling surface of the thermoelectric module 25, it is possible to prevent the temperature inside the refrigerator from rising.

The applied voltage determining means 53 for determining the voltage to be applied to the first thermoelectric module 25 of the main manifold 11 is higher when the ice making is performed than when the ice making is not performed. The rise value of the voltage applied to the auxiliary manifold 24 is determined by the voltage value obtained on the cooling surface of the first thermoelectric module 25 of the main manifold 11 so that the amount of heat absorbed coincides with the amount of heat radiation on the heat radiation surface of the second thermoelectric module 29 of the auxiliary manifold 24. Is what you do. In the present embodiment, as described above, the applied voltage is increased by 1 V when ice is made compared to when ice is not made.

Therefore, by setting the applied voltage of the first thermoelectric module 25 to an appropriate value when performing ice making, it is possible to prevent the inside of the refrigerator from being overcooled and to eliminate unnecessary power consumption. .

In the above description, the ice making switch 4
7 is not shown, but may be installed on the outer wall of the refrigerator body or in the refrigerator.

In the above embodiment, the internal temperature setting means 51 may be a fixed temperature control of, for example, 5 ° C., or may be a variable temperature control which can be set by a user.
In that case, the adjustment knob may be installed on the outer wall of the refrigerator main body or may be installed in the refrigerator.

[0047]

As described above, according to the present invention, the inside of the refrigerator main body is cooled by heat exchange between the cooling heat exchanger and the air inside the refrigerator main body, and ice is made by absorbing heat on the cooling side of the auxiliary manifold. An ice making switch for setting whether or not to make ice in a thermoelectric modular electric refrigerator;
When making ice at N, the second thermoelectric module of the auxiliary manifold is energized at a predetermined voltage, and the ice making switch is turned off.
Auxiliary manifold energization control means for interrupting energization to the second thermoelectric module, an internal temperature sensor provided inside the refrigerator main body, and an internal temperature detecting means for detecting an internal temperature by the internal temperature sensor An internal temperature setting means for setting the internal temperature to a predetermined temperature; a temperature of the internal temperature detected by the internal temperature detecting means; and a temperature of a predetermined temperature set by the internal temperature setting means. A temperature difference calculating means for calculating the difference, and a voltage applied to the first thermoelectric module of the main manifold in accordance with the temperature difference calculated by the temperature difference calculating means. When the temperature difference is small, the applied voltage is low, and when the ice making switch is turned on, the applied voltage is determined to be higher than when the ice making is not performed. According applied voltage, a configuration in which a main manifold energization control means for energizing the first thermoelectric module of the main manifold.

Further, the applied voltage determining means for determining the voltage to be applied to the first thermoelectric module of the main manifold is set to be higher when ice is made by turning on the ice making switch than when ice is not made. The rise value of the voltage applied to the thermoelectric module is set to a voltage value obtained on the cooling surface of the first thermoelectric module of the main manifold so that the amount of heat absorbed coincides with the heat radiation amount of the heat radiation surface of the second thermoelectric module of the auxiliary manifold. It is characterized by doing.

According to the present invention, the voltage applied to the first thermoelectric module of the main manifold is increased to increase the amount of heat absorbed on the cooling surface of the first thermoelectric module when ice making is performed. An ice-making chamber for ice making with the inside of the refrigerator by preventing the temperature inside the refrigerator from becoming excessively cool by preventing the temperature of the refrigerator from rising, and by setting the rise in the applied voltage to an appropriate value, thereby eliminating unnecessary power consumption. Can be efficiently cooled at a stable temperature.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a thermoelectric module type electric refrigerator in an embodiment of the present invention.

FIG. 2 is an external perspective view of the embodiment.

FIG. 3 is a partially cutaway rear view of the embodiment.

FIG. 4 is a horizontal cross-sectional view of the upper part of the refrigerator body of the embodiment.

FIG. 5 is a perspective view showing a heat-radiating heat exchanger and a fan motor according to the embodiment;

FIG. 6 is an explanatory diagram of a heat radiation / heat absorption cycle and a block diagram of an ice making control device of the embodiment.

FIG. 7 is a heat radiation cycle diagram showing a piping state of the heat radiation system of the embodiment.

FIG. 8 is an endothermic cycle diagram showing a piping state of the endothermic system of the embodiment.

FIG. 9 is a front sectional view of the ice making part of the embodiment.

FIG. 10 is a flowchart for explaining the operation in the embodiment;

FIG. 11 is a characteristic diagram showing a relationship between an applied voltage and a temperature difference in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator main body 8,45 Insulation material 9 Outer compartment 10 Heat-dissipating heat exchanger 11 Main manifold 13a, 13b, 13c Fan motor 14a, 14b First and second circulation pump 17 Inside 18 Partition wall 19 Inside mechanical room 20 Cooling Heat exchanger 23 ice making plate 24 auxiliary manifold 25 Peltier device 26a, 26b as first thermoelectric module first and second heat exchange unit 29 Peltier device as second thermoelectric module 30 third heat exchange unit 44 Concave portion on the upper surface of the ice making plate 47 Ice making switch 48 Auxiliary manifold energizing control means 49 Internal temperature sensor 50 Internal temperature detecting means 51 Internal temperature setting means 52 Temperature difference calculating means 53 Applied voltage determining means 54 Main manifold energizing controlling means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Osamu Nakagawa 4-5-2-5 Takaidahondori, Higashiosaka-shi, Osaka Inside Matsushita Refrigerating Machinery Co., Ltd. (72) Hiroaki Kitagawa 4-chome Takaidahondori, Higashiosaka-shi, Osaka No.2-5 Matsushita Refrigeration Co., Ltd.

Claims (2)

[Claims] 1. A main manifold having a first heat exchange part thermally coupled to a heat radiation surface of a first thermoelectric module and a second heat exchange part thermally coupled to a cooling surface of the first thermoelectric module, An auxiliary manifold having a third heat exchange part thermally coupled to the heat radiation surface of the second thermoelectric module is provided, and an auxiliary manifold of the first circulation pump, the heat radiation heat exchanger, and the first heat exchange part of the main manifold is provided. A circulation path is formed, a liquid is filled therein to form a heat radiation system, and a second circulation pump, a cooling heat exchanger, a third heat exchange section of the auxiliary manifold, and a main heat exchanger of the main manifold are formed. A second circulation path with the second heat exchange part is formed, a liquid is filled therein to form a heat absorption system, and a heat exchange between the cooling heat exchanger and the air in the refrigerator body is performed by the heat exchange. Cools the inside of the main unit and sucks air on the cooling side of the auxiliary manifold. In a thermoelectric module type electric refrigerator that makes ice by heat, an ice making switch for setting whether or not to make ice, and when making ice by turning on the ice making switch, energizing the second thermoelectric module of the auxiliary manifold at a predetermined voltage, Auxiliary manifold energization control means for interrupting energization to the second thermoelectric module when the switch is turned off, an internal temperature sensor provided in the refrigerator main body, and an internal temperature for detecting the internal temperature by the internal temperature sensor. Detecting means, an internal temperature setting means for setting the internal temperature to a predetermined temperature, an internal temperature detected by the internal temperature detecting means, and a predetermined temperature set by the internal temperature setting means. And a voltage applied to the first thermoelectric module of the main manifold according to the temperature difference calculated by the temperature difference calculating means. When the temperature difference is large, the applied voltage is high, when the temperature difference is small, the applied voltage is low, and when the ice making switch is turned on, the applied voltage is determined to be higher than when ice is not made. An ice making control device for a thermoelectric module type electric refrigerator, comprising: means for supplying electricity to a first thermoelectric module of the main manifold according to the applied voltage determined by the applied voltage determining means. 2. An applied voltage determining means for determining a voltage to be applied to the first thermoelectric module of the main manifold, wherein the first thermoelectric module is set higher when ice is made by turning on an ice making switch than when ice is not made. The rise value of the voltage applied to the auxiliary manifold is a voltage value at which a heat absorption amount that matches the heat radiation amount of the heat radiation surface of the second thermoelectric module of the auxiliary manifold is obtained on the cooling surface of the first thermoelectric module of the main manifold. Characteristic ice making control device for thermoelectric modular electric refrigerator.