JPH08285426A - Refrigerator - Google Patents

Abstract

PURPOSE: To reduce a consumption power of a refrigerator by a method wherein a flow rate of refrigerant is adjusted in such a way that a requisite minimum flow rate of refrigerant required for preventing dew formation may be flowed so as not, to provide heating more than that required for a condenser to prevent dew formation of a refrigerator. CONSTITUTION: This refrigerator is comprised of a bypass pipe 6 for bypassing a dew formation preventing condenser 2b, a pressure sensing device for sensing a pressure within the dew formation preventing condenser 2b and a refrigerant flow rate distributing device 7 for distributing a flow rate of refrigerant flowing in the bypass pipe 6 in response to an output of the pressure sensing device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator provided with a freezer compartment and a refrigerating compartment, having a heat dissipation condenser on the back and side surfaces of the main body and a condensation prevention condenser on the periphery of the main body opening.

[0002]

2. Description of the Related Art FIG. 6 is a system diagram showing a refrigerating cycle of a conventional refrigerator disclosed in Japanese Patent Laid-Open No. 5-118730.

In FIG. 6, 1 is a compressor, 2 is a condenser circuit, 3 is a capillary, 4 is an evaporator, 5 is a heat exchanger, 14 is a switchgear, and 15 is a bypass condenser.

The heat exchanger 5 is composed of the above-mentioned capillary 3 and the middle portion of the refrigerant suction pipe communicating from the discharge port of the evaporator 4 to the suction port of the compressor 1. Capacitor circuit 2
Is composed of a heat radiating capacitor 2a and a dew condensation preventing capacitor 2b.

The heat radiating capacitor 2a is provided on the back and side surfaces of the refrigerator, and the dew condensation preventing capacitor 2b is provided on the periphery of the opening of the refrigerator body.

The bypass capacitor 15 is a heat dissipation capacitor 2a.
From the output of the capacitor to the output of the dew condensation preventing capacitor 2b. An opening / closing mechanism 14 is provided at the branch point between the output portion of the heat dissipation capacitor 2a and the bypass capacitor 15.

The operation of the refrigerator constructed as above will be described below. The high-temperature and high-pressure gas refrigerant compressed by the compressor 1 is sequentially cooled and condensed and liquefied by the heat radiating condenser 2a and the dew condensation preventing condenser 2b which constitute the condenser circuit 2. Here, the peripheral edge of the opening of the refrigerator body is heated by the dew condensation preventing capacitor 2b. When the periphery of the opening of the refrigerator body is heated more than necessary, the opening / closing mechanism at the branch point of the output portion of the heat radiating condenser 2a and the bypass condenser 15 is closed to allow the refrigerant to flow to the bypass condenser 15, and conversely When the peripheral edge of the part is little heated and dew condensation occurs, the opening / closing mechanism is opened to allow the refrigerant to flow to the dew condensation preventing condenser.

The refrigerant that has undergone the condensation process as described above flows into the capillary 3, is decompressed, and flows into the evaporator 4.

Here, heat is exchanged with the air in the refrigerator, and the air in the refrigerator is cooled. Further, the refrigerant gasified by the heat exchange with the internal air flows into the heat exchanger 5 to further exchange heat with the high temperature liquid refrigerant flowing in the capillary 3, and then is sucked into the compressor 1.

[0010]

However, in the above-mentioned conventional configuration, the opening / closing mechanism is used to adjust the refrigerant flow rate when the dew condensation preventing capacitor 2b radiates heat to the periphery of the opening of the refrigerator body more than necessary. There was a drawback that it could not be done.

The present invention solves the conventional problems, and an object of the present invention is to provide a refrigerator in which the flow rate of the refrigerant is adjusted to prevent excessive heating in order to prevent dew condensation.

[0012]

To achieve this object, a refrigerator according to the present invention comprises a bypass pipe, a pressure detecting device for detecting the pressure of a condensation preventing condenser, and a refrigerant for distributing the flow rate of the refrigerant by the output of the pressure detecting device. And a flow distribution device.

Further, the temperature detecting device for detecting the temperature of the dew condensation preventing capacitor and the distributing device for distributing the flow rate of the refrigerant by the output of the temperature detecting device are provided.

Further, a temperature detecting device for detecting the temperature of the dew condensation preventing capacitor, an ambient temperature detecting device for detecting the ambient temperature, and a distribution device for distributing the refrigerant flow rate by the output of the temperature detecting device and the output of the ambient temperature detecting device. It is configured with.

Further, a temperature detecting device for detecting the temperature of the dew condensation preventing capacitor, an ambient temperature detecting device for detecting the ambient temperature, a humidity detecting device for detecting the humidity, an output of the temperature detecting device and an output of the ambient temperature detecting device. And a distribution device that distributes the refrigerant flow rate according to the output of the humidity detection device.

[0016]

The refrigerator of the present invention is provided with a bypass pipe, a pressure detection device for detecting the pressure of the dew condensation preventing condenser, and a refrigerant flow distribution device for distributing the refrigerant flow amount by the output of the pressure detection device. The minimum flow rate of the refrigerant that does not cause dew condensation on the periphery of the opening flows into the dew condensation preventing condenser, and the remaining refrigerant flows so that the refrigerant flows into the bypass pipe.

Further, by providing a temperature detecting device for detecting the temperature of the dew condensation preventing capacitor and a distributor for distributing the flow rate of the refrigerant by the output of the temperature detecting device, a proper refrigerant corresponding to the temperature of the dew preventing capacitor is provided. Distribute the flow rate between the dew condensation condenser and the bypass pipe.

Further, a temperature detection device for detecting the temperature of the dew condensation preventing capacitor, an ambient temperature detection device for detecting the ambient temperature, and a distribution device for distributing the refrigerant flow rate by the output of the temperature detection device and the output of the ambient temperature detection device. By including, the appropriate flow rate of the refrigerant is distributed to the condensation prevention capacitor and the bypass pipe in accordance with the temperature of the condensation prevention capacitor and the ambient temperature.

Further, a temperature detecting device for detecting the temperature of the dew condensation preventing capacitor, an ambient temperature detecting device for detecting the ambient temperature, a humidity detecting device for detecting the humidity, an output of the temperature detecting device and an output of the ambient temperature detecting device. And a distribution device that distributes the refrigerant flow rate according to the output of the humidity detection device, thereby distributing an appropriate refrigerant flow rate to the condensation prevention capacitor and the bypass pipe in accordance with the temperature of the condensation prevention capacitor and the ambient temperature and humidity. .

[0020]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the refrigerator according to the present invention will be described 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 system diagram showing a refrigerating cycle of a refrigerator according to the first embodiment of the present invention. FIG. 2 is a structural diagram of the refrigerant flow rate distribution device of the refrigerator of the embodiment.

In FIG. 1, reference numeral 6 denotes a bypass pipe which branches from the outlet of the heat dissipation capacitor 2a to the outlet of the dew condensation preventing capacitor 2b. A refrigerant flow distribution device 7 is provided at the branch point of the bypass pipe 6 and the outlet of the heat dissipation condenser 2a.

In FIG. 2, a movable refrigerant flow rate distribution mechanism 8 is moved by a distribution mechanism drive motor 10 driven by the output of the pressure detection device 9.

Regarding the refrigerator configured as described above,
The operation will be described below. When the movable refrigerant flow distribution mechanism 8 is moved to the bypass pipe 6 side by the distribution mechanism drive motor 10 driven by the output of the pressure detection device 9, the refrigerant flow amount flowing into the bypass pipe 6 increases and the refrigerant flow amount flowing into the dew condensation preventing condenser 2b. Is reduced.

When the movable refrigerant flow distribution mechanism 8 is moved to the dew condensation preventing condenser 2b side, the refrigerant flow rate flowing into the bypass pipe 6 is decreased and the refrigerant flow rate flowing into the dew condensation preventing condenser 2b is increased.

That is, when the periphery of the opening of the refrigerator main body is heated more than necessary, the pressure inside the condensation condenser 2b increases more than necessary.

The movable refrigerant flow rate distribution mechanism 8 is moved to the bypass pipe 6 side by the distribution mechanism drive motor 10 which is driven by the output of the pressure detection device 9 that detects the increased pressure, and the refrigerant flow rate flowing into the bypass pipe 6 is changed. The flow rate of the refrigerant flowing through the dew condensation preventing condenser 2b is increased.

By thus reducing the flow rate of the refrigerant flowing into the dew condensation preventing condenser 2b, the heating of the periphery of the refrigerator opening is reduced.

Further, after the above work, if the amount of heat at the periphery of the opening of the refrigerator main body becomes insufficient due to changes in the environment in which the refrigerator is used, etc., and dew condensation occurs, the pressure in the dew condensation preventing capacitor 2b decreases more than necessary.

The distribution mechanism drive motor 10 driven by the output of the pressure detecting device 9 that detects the reduced pressure moves the movable refrigerant flow distribution mechanism 8 to the dew condensation preventing condenser 2b side and flows into the dew condensation preventing condenser 2b. The flow rate is increased to increase the flow rate of the refrigerant flowing into the dew condensation preventing condenser 2b.

In this way, by increasing the flow rate of the refrigerant flowing into the dew condensation preventing capacitor 2b, the amount of heat at the periphery of the refrigerator opening is increased to prevent dew condensation.

The pipe connecting portion of the pressure detecting device 9 is not limited to this embodiment as long as it is from the outlet of the compressor 1 to the dew condensation preventing condenser 2b.

(Second Embodiment) Next, a second embodiment of the refrigerator according to the present invention will be described with reference to the drawings.
The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 3 is a structural diagram of a refrigerant flow distribution device for a refrigerator according to a second embodiment of the present invention.

In FIG. 3, reference numeral 11 denotes a temperature detecting device, which is attached to the dew condensation preventing capacitor 2b. In this embodiment, a temperature detecting device 11 is provided in place of the pressure detecting device 9 of the refrigerator according to the first embodiment.

With respect to the refrigerator configured as described above,
The operation will be described below. When the periphery of the opening of the refrigerator body is heated more than necessary, the temperature of the dew condensation preventing capacitor 2b rises more than necessary.

The movable refrigerant flow rate distribution mechanism 8 is moved to the bypass pipe 6 side by the motor 10 driven by the output of the temperature detection device 11 that detects the increased temperature to reduce the refrigerant flow rate flowing into the dew condensation preventing condenser 2b. Reduces the heating around the refrigerator opening.

Further, after the above operation, if the amount of heat at the periphery of the opening of the refrigerator main body becomes insufficient due to changes in the environment in which the refrigerator is used, etc., and dew condensation occurs, the temperature of the dew condensation preventing capacitor 2b drops more than necessary.

The motor driven by the output of the temperature detecting device 11 which detects the lowered temperature moves the movable refrigerant flow rate distribution mechanism 8 to the dew condensation preventing condenser 2b side to increase the refrigerant flow rate flowing into the dew condensation preventing condenser 2b. This increases the amount of heat around the opening of the refrigerator to prevent dew condensation.

The mounting portion of the temperature detecting device 11 is connected to the dew condensation preventing capacitor 2b from the outlet of the heat radiating capacitor 2a.
The above is not the limit of this embodiment.

As described above, the refrigerator according to the present embodiment is provided with the temperature detecting device 11 instead of the pressure detecting device 9 of the refrigerator according to the first embodiment, and can be installed more easily than the first embodiment. You can

(Third Embodiment) Next, a third embodiment of the refrigerator according to the present invention will be described with reference to the drawings.
The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 4 is a structural diagram of a refrigerant flow distribution device for a refrigerator according to a third embodiment of the present invention.

In FIG. 4, reference numeral 12 denotes an ambient temperature detecting device for detecting the ambient temperature. In this embodiment, the refrigerator according to the second embodiment is further provided with an ambient temperature detecting device 12.

Regarding the refrigerator configured as described above,
The operation will be described below. When the peripheral edge of the refrigerator main body is heated more than necessary due to the difference in temperature between the ambient temperature and the dew condensation preventing capacitor 2b, the output of the temperature detection device 11 is larger than the output of the ambient temperature detection device 12.

In such a case, the driving motor 10 moves the movable refrigerant flow rate distribution mechanism 8 to the bypass pipe 6 side to reduce the refrigerant flow rate into the dew condensation preventing condenser 2b, thereby reducing the heating of the periphery of the refrigerator opening. Let

After the above operation, when the amount of heat at the periphery of the opening of the refrigerator body is insufficient due to the temperature difference between the ambient temperature and the dew condensation preventing capacitor 2b, the output of the ambient temperature detecting device 12 is output from the output of the temperature detecting device 11. Is bigger.

In such a case, the driving motor 10 moves the movable refrigerant flow rate distribution mechanism 8 to the dew condensation preventing capacitor 2b side to increase the refrigerant flow rate flowing into the dew condensation preventing capacitor 2b, thereby heating the periphery of the refrigerator. To prevent dew condensation.

As described above, the refrigerator according to the present embodiment is the refrigerator according to the second embodiment further provided with the ambient temperature detecting device 12, and the refrigerant flow rate can be distributed more accurately than in the second embodiment. You can

(Fourth Embodiment) Next, a fourth embodiment of the refrigerator according to the present invention will be described with reference to the drawings.
The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 5 is a structural diagram of a refrigerant flow distribution device for a refrigerator according to a fourth embodiment of the present invention.

In FIG. 5, reference numeral 13 is a humidity detecting device for detecting humidity. In this embodiment, the refrigerator according to the third embodiment is further provided with a humidity detecting device 13.

Regarding the refrigerator configured as described above,
The operation will be described below. When the temperature of the dew condensation preventing capacitor 2b detected by the temperature detecting device 11 is higher than the dew point temperature calculated from the ambient temperature detected by the ambient temperature detecting device 12 and the humidity detected by the humidity detecting device 13, the refrigerator. The peripheral edge of the main body opening is heated more than necessary.

In such a case, the drive motor 10 moves the movable refrigerant flow rate distribution mechanism 8 to the bypass pipe 6 side to reduce the refrigerant flow rate flowing into the dew condensation preventing condenser 2b, thereby reducing the heating of the periphery of the refrigerator opening. .

After the above operation, the ambient temperature detecting device 12
When the temperature of the dew condensation preventing capacitor 2b detected by the temperature detecting device 11 is lower than the dew point temperature calculated from the ambient temperature detected by the temperature detecting device 13 and the humidity detected by the humidity detecting device 13, the temperature around the opening of the refrigerator main body is The heating amount is insufficient.

In such a case, the drive motor 10 moves the movable refrigerant flow rate distribution mechanism 8 to the dew condensation preventing capacitor 2b side to increase the refrigerant flow rate flowing into the dew condensation preventing capacitor 2b, thereby increasing the amount of heat at the periphery of the refrigerator opening. Increase and prevent condensation.

As described above, the refrigerator according to the present embodiment is the refrigerator according to the third embodiment further provided with the humidity detecting device 13, and distributes the refrigerant flow rate more accurately as compared with the third embodiment. be able to.

[0058]

As described above, according to the present invention, the bypass pipe, the pressure detecting device for detecting the pressure of the dew condensation preventing capacitor, the refrigerant flow rate distributing device for distributing the refrigerant flow rate by the output of the pressure detecting device, and the refrigerator. Therefore, it is possible to distribute the refrigerant flow rate such that the minimum necessary refrigerant flow rate that does not cause dew condensation around the opening of the refrigerator main body flows into the dew condensation preventing condenser and the remaining refrigerant flows into the bypass pipe.

As a result, the flow rate of the refrigerant could be adjusted so as not to heat the dew condensation prevention capacitor more than necessary.

Further, by providing a temperature detecting device for detecting the temperature of the dew condensation preventing capacitor and a distribution device for distributing the refrigerant flow amount by the output of the temperature detecting device, an appropriate refrigerant flow amount corresponding to the temperature of the dew condensation preventing capacitor is provided. Can be distributed between the dew condensation prevention capacitor and the bypass pipe.

This temperature detecting device can be attached more easily than the pressure detecting device. Further, it is provided with a temperature detection device for detecting the temperature of the dew condensation preventing capacitor, an ambient temperature detection device for detecting the ambient temperature, and a distribution device for distributing the refrigerant flow rate by the output of the temperature detection device and the output of the ambient temperature detection device. This makes it possible to distribute an appropriate refrigerant flow amount to the condensation prevention capacitor and the bypass pipe in accordance with the temperature of the condensation prevention capacitor and the ambient temperature.

When both the temperature detecting device and the ambient temperature detecting device are provided, the refrigerant flow rate can be distributed more accurately than when only the temperature detecting device is provided.

Further, a temperature detecting device for detecting the temperature of the dew condensation preventing capacitor, an ambient temperature detecting device for detecting the ambient temperature, a humidity detecting device for detecting the humidity, an output of the temperature detecting device and an output of the ambient temperature detecting device. And a distribution device that distributes the refrigerant flow rate according to the output of the humidity detection device, so that an appropriate refrigerant flow rate can be distributed between the condensation prevention capacitor and the bypass pipe according to the temperature of the condensation prevention capacitor and the ambient temperature and humidity. You can

When the temperature detecting device, the ambient temperature detecting device and the humidity detecting device are provided, the refrigerant flow rate can be distributed more accurately than when the temperature detecting device and the ambient temperature detecting device are provided.

[Brief description of drawings]

FIG. 1 is a piping diagram showing a refrigeration cycle of a first embodiment of a refrigerator according to the present invention.

FIG. 2 is a cross-sectional view showing a refrigerant flow distribution device for a refrigerator according to the same embodiment.

FIG. 3 is a sectional view showing a refrigerant flow distribution device of a second embodiment of the refrigerator according to the present invention.

FIG. 4 is a sectional view showing a refrigerant flow distribution device of a third embodiment of the refrigerator according to the present invention.

FIG. 5 is a sectional view showing a refrigerant flow distribution device of a fourth embodiment of the refrigerator according to the present invention.

FIG. 6 is a system diagram showing a refrigeration cycle of a conventional refrigerator.

[Explanation of symbols]

 2 Capacitor circuit 2a Heat dissipation capacitor 2b Condensation prevention capacitor 6 Bypass pipe 7 Refrigerant flow distribution device 9 Pressure detection device 11 Temperature detection device 12 Ambient temperature detection device 13 Humidity detection device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Haruyuki Yamamoto Inventor Haruyoshi Yamada 4-2-5 Takada Hondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigerator Co., Ltd. (72) Yasuki Hamano 4 Takaidamoto-dori, Higashi Osaka City, Osaka Prefecture 2-5 Matsushita Refrigerator Co., Ltd. (72) Inventor Shinichi Kanaoka 4-2-5 Takaidahondori, Higashi-Osaka-shi, Osaka Prefecture Matsushita Refrigerator Co., Ltd. (72) Inventor Yoshitaka Kubota Takaidamoto, East Osaka-shi, Osaka 4-4-5 Tsudori Matsushita Cold Machinery Co., Ltd.

Claims (4)

[Claims] 1. A refrigerator provided with a heat radiating capacitor in a capacitor circuit which is a refrigerant circulation path, and a dew condensation preventing capacitor which is provided in series with the heat radiating capacitor and which transfers heat to a peripheral edge of an opening of a refrigerator body to prevent dew condensation. In, a bypass pipe that is provided in parallel with the dew condensation preventing capacitor and bypasses the dew condensation preventing capacitor, a pressure detection device that detects the pressure of the dew condensation preventing capacitor, and a refrigerant flow rate that flows into the bypass pipe by the output of the pressure detection device. Refrigerant flow distribution device for distributing the refrigerator. 2. The refrigerant flow rate distribution device comprises: a temperature detection device for detecting the temperature of the dew condensation preventing capacitor; and a distribution device for distributing the refrigerant flow rate according to the output of the temperature detection device. Refrigerator according to 1. 3. The refrigerant flow distribution device, a temperature detection device,
The refrigerator according to claim 1, further comprising: an ambient temperature detection device that detects an ambient temperature; and a distribution device that distributes a refrigerant flow rate based on an output of the temperature detection device and an output of the ambient temperature detection device. 4. The refrigerant flow distribution device, a temperature detection device,
Ambient temperature detection device, humidity detection device for detecting humidity,
The refrigerator according to claim 1, further comprising: a distribution device that distributes a refrigerant flow rate according to an output of the temperature detection device, an output of the ambient temperature detection device, and an output of the humidity detection device.