JPH08247567A - Absorption refrigerator - Google Patents

Abstract

PURPOSE: To improve the cooling capacity by raising the capacity of a heater for a predetermined time at the time of energizing a power source, improving the cooling capacity, and raising the capacity of the heater if the atmospheric temperature detection at the time of energizing the power source indicates a predetermined temperature or higher. CONSTITUTION: The absorption refrigerator comprises a timer 32 connected to the input of control means 27 such as a microcomputer, and a control circuit 26 connected with driving means 29 for operating a heater 28 for a first generator to the output of the means 27 and driving means 31 for operating a heater 30 for a second generator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerator, and more particularly to operation control thereof.

[0002]

2. Description of the Related Art A conventional operation control of an absorption refrigerator is disclosed in Japanese Patent Laid-Open No. 3-170763.

The conventional configuration will be described below with reference to the drawings. FIG. 7 is a block diagram of a conventional absorption refrigerator. In FIG. 7, reference numeral 1 is a control circuit, which is a control means 2 such as a microcomputer (hereinafter referred to as a microcomputer). A temperature detector 3 is connected to the input terminal of the control means 2. A driving means 5 for moving the generator heater 4 is connected to an output terminal of the control means 2.

FIG. 8 is a rear view of an absorption refrigerator having a control circuit having the above circuit configuration, and FIG. 9 is a sectional view of the absorption refrigerator.

In the figure, 6 is an absorption refrigerator main body, and a heat insulating material 9 is filled between an outer box 7 and an inner box 8. An integrally molded dew tray 10 is provided at the upper back of the inner box 8.
There is. The drain guide 11 is provided in the drain hole 11 of the dew tray 10
2 is attached in close contact, penetrates the inner box 8, the heat insulating material 9 and the outer box 7, is connected and attached to the drain hose 13 outside the refrigerator, and is in close contact with the high temperature and high pressure pipe 14 provided in the lower part of the outer box 7 It is guided into the dish 15. Reference numeral 16 denotes a cooling pipe, which is in close contact with the heat conduction plate 17 and is attached to the inner upper portion of the inner box 8. The temperature detector 3 that detects the temperature inside the refrigerator and stops the operation of the heater 4 for the generator is used to naturally dissolve the dew adhered to the cooling pipe 16 and the heat conduction plate 17 during cooling in the refrigerator. The defrost switch 18 is provided in each of the compartments.

Further, the absorption type refrigeration cycle has a generator 19
The generator 19 is provided with a generator tube 20 and the generator heater 4 is installed therein. The rectifying pipe 21 and the condenser 2 are connected to the generating pipe 20.
2 is formed, and the condenser 22 has the cooling pipe 16
Are arranged in the refrigerator.

The cooling pipe 16 has a double pipe structure in which hydrogen gas rises in the inner pipe and liquid and gaseous ammonia and hydrogen gas fall outside the inner pipe. There is. The internal pipe communicates with the absorber 23, and the cooling pipe 16 communicates with the liquid reservoir 25 via the return pipe 24.

Further, the control circuit 1 constituting the above-mentioned circuit is attached to the back surface of the absorption refrigerator main body 6.

The operation of the control apparatus for the absorption refrigerator constructed as above will be described below with reference to the flowchart of FIG.

FIG. 10 is a flowchart showing the entire control program stored in the microcomputer 2. When the power is turned on, in step 100, all the data of the microcomputer 2 is cleared and initialization is performed. Next, in step 101, the state of the temperature detector 3 is read, and if the internal temperature of the absorption refrigerator main body 6 is higher than the set value, a signal is output to the driving means 5 to operate the generator heater 4 in step 102. .

That is, the ammonia solution from the liquid reservoir 25 heated by the heater 4 for the generator rises in the generation pipe 20, becomes a part of ammonia gas and flows into the rectification pipe 21 side.
Part of the ammonia gas radiates heat here and is liquefied.

Then, it descends into the cooling pipe 16, is mixed with hydrogen gas which has risen from the condenser 22 in the inner pipe of the cooling pipe 16, and while descending in the cooling pipe 16, heat is taken from the surroundings and vaporized. After that, it returns to the liquid reservoir 25 together with hydrogen gas.

In the absorber 23, the generating tube 20
The ammonia gas component is absorbed by the dilute solution from
A cycle is formed in which only hydrogen gas rises to the piping inside the cooling pipe 16 to perform a cooling action.

When it is judged in step 101 that the temperature detector 3 is low, in step 103 the signal of the driving means 5 is shut off to stop the generator heater 4. Therefore, ammonia gas is not generated and the cycle is stopped. After that, this action is repeated to perform a normal cooling action.

[0015]

However, the above-mentioned conventional configuration detects the temperature in the refrigerator and stops the operation of the heater for the generator, but it is necessary to sufficiently cool the inside of the absorption refrigerator when the outside air temperature is high especially in summer. Was taking time.

The present invention solves the conventional problems, and an object thereof is to improve the cooling capacity by increasing the capacity of the generator heater to rapidly cool the inside of the refrigerator when the power is turned on.

[0017]

In order to achieve this object, the absorption refrigerator according to the present invention is provided with a control circuit for increasing the capacity of the generator heater for a certain period of time after the power is turned on.

Further, when the outside air temperature is equal to or higher than a predetermined temperature when the power is turned on, a control circuit for increasing the capacity of the generator heater and operating it is provided.

[0019]

In the absorption refrigerator according to the present invention, the capacity of the heater for the generator is increased for a certain period of time after the power is turned on, so that the inside of the refrigerator can be cooled earlier than before.

Further, since the capacity of the heater for the generator is increased when the temperature detector detects a temperature equal to or higher than a predetermined temperature, the inside of the refrigerator can be cooled earlier than before.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an absorption refrigerator according to the present invention will be described below with reference to the drawings. It should be noted that the same configurations as those of the conventional one are denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a block diagram of an absorption refrigerator according to the present invention. In FIG. 1, reference numeral 26 is a control circuit, which is a control means 27 such as a microcomputer (hereinafter referred to as a microcomputer), and the temperature detector 3 is connected to the input terminal of the control board 27. The driving means 29 for moving the first generator heater 28 and the driving means 31 for moving the second generator heater 30 are connected to the output terminal of the control means 27.

FIG. 2 is a rear view of an absorption refrigerator having a control circuit having the above circuit configuration. This absorption refrigerator body 6
The control circuit 26 having the above-described circuit on the back side of the and the timer 32 for counting a predetermined time from the time of power-on, the second circuit
The first generator heater 28 that stops the operation of the generator heater 30 and stops the operation after a lapse of a certain time from the power-on is attached.

The operation of the control apparatus for the absorption refrigerator constructed as above will be described below with reference to the flowchart of FIG.

FIG. 3 is a flowchart showing the entire control program stored in the microcomputer 27. still,
The microcomputer 27 has a built-in timer 32 that starts counting immediately after the power is turned on. When the power is turned on,
At step 200, all data of the microcomputer 27 is cleared and initialization is performed. Next step 201
As a result, the state of the timer 32 is read.
At 2, a signal is output to the driving means 29 to operate the first generator heater 28.

That is, the ammonia solution from the liquid reservoir 25 heated by the first generator heater 28 (for example, 100 W) rises in the generation pipe 20, becomes a part of ammonia gas and flows into the rectification pipe 21 side. Partly diluted solution flows into the absorber 23 side. The ammonia gas flowing from the rectifying pipe 21 into the condenser 22 radiates heat here and is liquefied.

Then, it descends into the cooling pipe 16 and is mixed with the hydrogen gas which has risen from the condenser 22 in the internal pipe of the cooling pipe 16, and while descending inside the cooling pipe 16, heat is taken from the surroundings and vaporized. After that, it returns to the liquid reservoir 25 together with hydrogen gas. Then, in the absorber 23, the ammonia gas component is absorbed by the dilute solution from the generation pipe 20, and only hydrogen gas rises to the internal pipe of the cooling pipe 16 to form a cycle to perform a cooling action.

When the timer 32 is less than the set time (for example, 30 minutes), a signal is output to the driving means 31 to operate the second generator heater 30 (for example, 120 W) in step 203.

That is, the larger the capacity of the heater for the generator is, the more quickly the ammonia gas is liquefied and vaporized, and the faster the cooling speed is.

Therefore, when the power is turned on, the capacity of the generator heater is increased by a timer for a certain period of time, so that the inside of the refrigerator can be cooled earlier than before.

Next, an absorption refrigerator according to another embodiment will be described. The same components as those of the conventional and first embodiments are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 4 is a block diagram of the absorption refrigerator according to the present invention. In FIG. 4, reference numeral 33 denotes a control circuit, which is a control means 34 such as a microcomputer (hereinafter referred to as a microcomputer), and an outside air temperature detector 35 is connected to an input terminal of the control board 34.

A driving means 29 for moving the first generator heater 28 and a driving means 31 for moving the second generator heater 30 are connected to the output terminal of the control means 34.

FIG. 5 shows the control circuit 26 having the above-mentioned circuit on the rear surface of the absorption refrigerator main body 6, and the outside air for stopping the operation of the second generator heater 30 when the outside air temperature is higher than a predetermined temperature. Outside temperature detector 35 for stopping the operation of the temperature detector 35 and the heater 28 for the first generator
Installed with.

FIG. 6 is a flowchart showing the entire control program stored in the microcomputer 34. When the power is turned on, in step 300, all the data of the microcomputer 27 is cleared and initialization is performed. Next, in step 301, the state of the outside air temperature detector 35 is read. If the outside air temperature of the absorption refrigerator body 6 is higher than the set value (for example, 5 ° C. or higher), the state of the outside air temperature detector 35 is read in step 302. When the outside air temperature of the absorption refrigerator body 6 is lower than the set value (for example, less than 10 ° C)
Outputs a signal to the driving means 29 to operate the first generator heater 28 in step 304.

Then, in step 303, when the outside air temperature of the absorption refrigerator main body 6 is higher than the set value (for example, 10 ° C.).
The above is the heater 30 for the second generator (for example, 120
A signal is output to the driving means 31 to operate W).

Therefore, when the outside air temperature detector detects a predetermined temperature or higher when the power is turned on, the capacity of the generator heater is increased, so that the inside of the refrigerator can be cooled earlier than before.

That is, the larger the capacity of the heater for the generator, the more quickly the ammonia gas is liquefied and vaporized, and the faster the cooling speed is.

Therefore, when the outside air temperature detector detects a predetermined temperature or higher when the power is turned on, the capacity of the generator heater is increased, so that the inside of the refrigerator can be cooled earlier than in the conventional case.

[0040]

As described above, the present invention has an absorption type refrigeration cycle which is heated by a heater for a generator or the like to generate a refrigerant gas, and when the power is turned on, the absorption type refrigerator is used when the outside air temperature in summer is high. In order to prevent the cooling rate from slowing down, the cooling capacity is improved by increasing the capacity of the heater for the generator when the power is turned on, and the freshness of the food is maintained.

Further, it has an absorption refrigeration cycle which is heated by a generator heater or the like to generate a refrigerant gas, and a temperature detector which detects the outside air temperature and stops the operation of the generator heater. Since the temperature detector is an absorption refrigerator equipped with a control circuit that detects a predetermined temperature or higher, in order to prevent the cooling speed of the absorption refrigerator from slowing down when the outside air temperature in summer is high, At times, the capacity of the heater for the generator is increased to improve the cooling capacity and maintain the freshness of food, which is inexpensive and has a great effect.

[Brief description of drawings]

FIG. 1 is a control circuit diagram of an absorption refrigerator showing an embodiment of the present invention.

FIG. 2 is a rear view of the absorption refrigerator.

FIG. 3 is a flowchart of the absorption refrigerator.

FIG. 4 is a control circuit diagram of an absorption refrigerator showing another embodiment of the present invention.

FIG. 5 is a rear view of the absorption refrigerator.

FIG. 6 is a flowchart of the absorption refrigerator.

FIG. 7 is a control circuit diagram of a conventional absorption refrigerator.

FIG. 8 is a rear view of the absorption refrigerator.

FIG. 9 is a sectional view of the absorption refrigerator.

FIG. 10 is a flowchart of the absorption refrigerator.

[Explanation of symbols]

 6 Absorption Refrigerator 26 Control Circuit 28 Heater for Generator 1 30 Heater for Generator 2 32 Timer 33 Control Circuit 35 Outside Air Temperature Detector

Claims (2)

[Claims] 1. An absorption-type refrigeration cycle that generates a refrigerant gas by being heated by a heater for a generator, a timer that counts the operating time of the heater after the power is turned on, and a capacity of the heater for the generator when the power is turned on. Absorption refrigerator with a raising control circuit. 2. An absorption type refrigeration cycle that is heated by a heater for a generator to generate a refrigerant gas, an outside air temperature detector that detects the outside air temperature when the power is turned on, and stops the operation of the heater for the generator, and when the power is turned on. An absorption refrigerator having a control circuit for increasing the capacity of the heater for the generator when the outside air temperature detector detects a predetermined temperature or higher.