JPH1047836A - Refrigerator having freezing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an amount of a refrigerant from becoming excessive in a refrigerator having a freezing function when the temperature of a front face portion of a partition formed in a front opening portion becomes higher than a dew generating temperature. SOLUTION: A dew generating temperature is calculated based on measured results of an ambient temperature measuring device 22 and an ambient humidity measuring device 23 of a refrigerator body 21 having a freezing function. The calculated dew generating temperature is compared with temperatures measured by temperature measuring devices 24, 25, 26 on a front face portion of a partition. In case that the measured temperatures are higher than the dew generating temperature, a refrigerant is made to circulate through a bypass condenser 31 so as to reduce a heat absorbing load of the inside of the refrigerator thus enabling a reduction of a power consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator having a freezing function such as a refrigerator and a showcase.

[0002]

2. Description of the Related Art A conventional refrigeration system with a refrigeration function is disclosed in Japanese Patent Application Laid-Open No. 5-118730. As shown in FIG. The high-temperature and high-pressure refrigerant compressed by the compressor 2 circulates in the direction of the arrow and is guided to the heat dissipation condenser 4 disposed on the inner side surface 3 of the refrigeration apparatus main body 1.
Is circulated through the dew-prevention condenser 7 connected to the peripheral edge 5 of the front opening and the front part 6 of the partition wall.
Further, the heat is radiated by the heat dissipation condenser 8 connected to the dew condensation preventing condenser 7, and then expanded in the evaporator 12 through the drier 9, the fluid valve 10, and the capillary tube 11 to absorb the heat in the refrigerator, and the compressor 2 It is configured to return to. In addition, between the heat dissipation capacitor 4 and the heat dissipation capacitor 8, the bypass capacitor 13 is configured to bypass the dew condensation preventing capacitor 7.

[0003]

However, in the above-described conventional configuration, when the refrigerant passes through the bypass condenser 13,
Bypasses the condenser at the front part 6 of the partition wall and the condenser at the peripheral part 5 of the front opening. However, the condenser at the peripheral part 5 of the front opening has a larger heat radiation effect than the heat absorption into the refrigerator, so that the amount of heat radiation is small, and There is a risk that the power will increase.

Further, since the length of the bypass condenser 13 is shorter than the length of the condenser at the front wall 6 of the partition wall, the amount of the refrigerant is excessive, and there is a possibility that the liquid may flow back to the compressor.

The present invention has been made to solve the above-mentioned conventional problems. In addition to reducing heat absorption into a refrigerator, efficient heat radiation is ensured to minimize power consumption, and refrigerant is supplied to a bypass condenser. It is an object of the present invention to provide a refrigeration unit with a refrigeration function that does not cause liquid back to the compressor due to an excessive amount of refrigerant when passing through.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an outer temperature measuring device and an ambient humidity measuring device provided on an outer box of a refrigeration apparatus main body, and at least one or more of the refrigeration apparatus main bodies are provided on an opening peripheral portion of the main body. A temperature measuring device is attached, and arithmetic means for calculating a dew-prevention temperature based on the measurement results is provided. On the other hand, the bypass condenser is controlled by the output of the calculated dew-prevention temperature so that in the case of "open", the refrigerant bypasses only the dew-prevention condenser inside the front surface of the partition wall. By the function of the bypass capacitor, it is possible to reduce the heat absorption into the storage, and it is possible to increase the heat radiation efficiency at the peripheral edge of the opening of the main body.

Further, by making the volume of the bypass condenser equal to the volume of the dew condensation prevention condenser, an excessive amount of refrigerant can be prevented, and the possibility of liquid back to the compressor can be eliminated.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION
A radiating capacitor continuously piped to the inner surface of the outer box and the inner surface of the opening periphery of the refrigeration apparatus main body, and a dew-prevention capacitor connected to the inside of the front surface of a partition wall formed in the refrigeration apparatus main body in the middle of the radiating condenser. A capacitor circuit, an ambient temperature measuring device and an ambient humidity measuring device in the outer box, at least one or more temperature measuring devices in the peripheral portion of the opening, and a bypass capacitor that bypasses the dew condensation preventing capacitor in the capacitor circuit. An opening / closing mechanism for opening and closing the bypass capacitor; and a calculating means for calculating a dew-prevention temperature based on the measurement results of the ambient temperature measuring device and the ambient humidity measuring device, wherein the calculating means measures the temperature of the temperature measuring device. A detour control function that closes the opening and closing mechanism when the temperature is higher than the dew-prevention temperature and opens the opening and closing mechanism when the temperature is lower. It is obtained by the freezing function with refrigeration equipment to. Therefore, when the temperature of the temperature measuring device is equal to or higher than the dew-prevention temperature, the refrigerant circulates through the bypass capacitor, and when the temperature is equal to or lower than the dew-prevention temperature, the refrigerant circulates through the dew-prevention capacitor to exhibit the dew-prevention function.

Further, according to claim 2 of the present invention,
2. The refrigeration system according to claim 1, further comprising a bypass condenser which is continuously connected to a side plate of the outer box provided in the refrigeration apparatus main body and an end face of the opening / closing section, and has a bypass condenser having the same volume as the dew condensation prevention condenser on the front part of the partition wall. This is a refrigerator with function. Therefore, when the refrigerant circulates through the bypass condenser, an excessive amount of the refrigerant can be prevented, and the possibility of liquid back to the compressor can be eliminated.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) In FIG. 1, an refrigeration apparatus main body 2 in which an ambient temperature measuring device 22 and an ambient humidity measuring device 23 are disposed above a refrigeration device main body 21 having a refrigeration function.
Temperature measuring devices 24, 25, and 26 are incorporated into the front surface of the partition wall and the inside of the peripheral edge of the opening.
A bypass capacitor 31 is branched from a connection portion 29 of the heat radiation capacitor 27 to the dew condensation prevention capacitor 28 to the heat radiation capacitor 30. A switching valve 32 is provided at a branch point between the heat radiation condenser 27 and the bypass condenser 31. The switching valve 32 allows the refrigerant to flow to the dew condensation preventing condenser 28 or the bypass condenser 31.

In the above configuration, as shown in the control operation flow of the capacitor circuit of FIG.
Then, the ambient temperature and humidity are measured by the ambient humidity measuring device 23, and then the dew point and the dew point prevention temperature represented by the dew point + α are calculated by the calculating means (omitted) from the measurement result, and at the same time, the temperature measuring device 24, The temperature of the front surface of the partition wall is measured by 25 and 26, and the measured temperature is compared with the dew-prevention temperature calculated by the calculating means. If the measured temperature of the front surface of the partition wall is higher than the dew-prevention temperature, it is determined that no dew is emitted, and the switching valve 32 is switched to the bypass condenser 31 side so that the refrigerant flows through the bypass condenser 31. Conversely, if it is low, there is a possibility of dew formation, so that the switching valve 32 is switched to the dew-prevention condenser 28 side so that the refrigerant can pass through the dew-prevention condenser 28 to prevent dew formation.

(Embodiment 2) In FIG. 3, reference numeral 33 denotes a bypass capacitor having the same volume as the dew condensation preventing capacitor 28, and the other configuration and the capacitor control method are the same as those of the first embodiment. Therefore, if the measured temperature of the front surface of the partition wall is higher than the dew-prevention temperature, no dew is emitted, and the switching valve 32 is switched to the detour condenser 33 side, and the refrigerant is discharged to the detour condenser 3
3, the amount of refrigerant does not become excessive as in the related art, and liquid back to the compressor can be prevented.

[0014]

As is apparent from the above description, claim 1
According to the described invention, a radiating capacitor connected and piped to the inner surface of the outer box and the inner surface of the opening peripheral portion of the refrigeration apparatus main body,
In the middle of the heat dissipation capacitor, a condenser circuit connected to a dew condensation prevention capacitor arranged inside the front part of the partition wall formed in the refrigeration unit body, a detour capacitor for detouring the dew condenser, and an opening and closing for opening and closing the detour capacitor Along with the mechanism, an ambient temperature measuring device and an ambient humidity measuring device are provided in the outer box, and a temperature measuring device is provided on the inner surface of the front opening peripheral portion and the partition wall front portion of the refrigerating device, and the temperature is detected by these devices. A calculation device that calculates the dew-prevention temperature based on temperature and humidity is provided.If the measured temperature at the front of the partition wall is higher than the dew-prevention temperature, it is determined that dew does not depart, and the open / close mechanism is “opened”, that is, the bypass capacitor The refrigerant is allowed to flow, and if the temperature is low, the state is switched to "closed", and the refrigerant is caused to flow through the dew condensation preventing condenser to prevent dew formation.

Therefore, when it is not necessary to prevent the dew condensation, the refrigerant flows through the bypass condenser, but only the dew condensation condenser is bypassed, so that the heat absorption effect in the refrigeration device is weakened, the power consumption is minimized, and the efficient heat radiation is achieved. Can be secured.

According to the second aspect of the present invention, the volume of the bypass condenser is made equal to the volume of the dew condensation preventing condenser so that when the refrigerant flows into the bypass condenser, the refrigerant quantity is not excessive.

Therefore, there is no possibility that the liquid will flow back to the compressor, and the long-term reliability of the compressor can be particularly ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view of a refrigeration unit with a refrigeration function showing a first embodiment of the present invention.

FIG. 2 is a control operation flowchart of the capacitor circuit.

FIG. 3 is a perspective view of a refrigeration unit with a refrigeration function showing a second embodiment of the present invention.

FIG. 4 is a perspective view of a conventional refrigeration unit with a refrigeration function.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Refrigerator main body 22 Ambient temperature measuring device 23 Ambient humidity measuring device 24, 25, 26 Temperature measuring device 28 Dew prevention capacitor 31 Bypass capacitor 32 Switching valve 33 Bypass capacitor

Claims (2)

[Claims] 1. A radiating condenser continuously connected to an inner side surface of an outer box and an inner peripheral surface of an opening of a refrigeration unit main body, and dew drops on a front inside of a partition wall formed in the refrigeration unit main body in the middle of the radiating condenser. A capacitor circuit to which a prevention capacitor is connected; an ambient temperature measuring device and an ambient humidity measuring device in the outer box; at least one or more temperature measuring devices in the periphery of the opening; and a bypass circuit for the dew condensation preventing capacitor in the capacitor circuit. A bypass capacitor to be opened and closed, an opening / closing mechanism for opening and closing the bypass capacitor, and an arithmetic unit for calculating a dew-prevention temperature based on a measurement result of the ambient temperature measuring device and the ambient humidity measuring device, and When the temperature measured by the temperature measuring device is higher than the dew-prevention temperature, the opening / closing mechanism is closed. A refrigeration unit with a refrigeration function that has a time control function. 2. The refrigeration system with a refrigeration function according to claim 1, wherein a bypass capacitor having the same volume as the dew condensation prevention capacitor on the front surface of the partition wall provided in the refrigeration system body is provided.