KR100487313B1 - Method for decreasing noise in refrigerator - Google Patents

Abstract

It is an object of the present invention to provide a method of reducing disturbances caused by a refrigerant by disturbing refrigerant flow in a pipe.

To this end, the present invention, in a refrigerator having an evaporator, an evaporator fan, a condenser and a condenser fan, in order to reduce the abnormal sound generated by the periodic flow change of the refrigerant flowing along the pipe, the evaporator fan or the condenser fan It provides a noise reduction method of the refrigerator for periodically changing the RPM in conjunction with the abnormal sound generation cycle.

Description

Method for reducing noise in refrigerator

The present invention relates to a refrigerator, and more particularly, to a noise reduction method of a refrigerator.

In general, the refrigerator is a device used for long-term storage of fresh food, and can be broadly divided into a main body having a food storage room for refrigerating and freezing food and a refrigeration cycle for cooling the food storage room.

Here, the refrigeration cycle, as shown in Figure 1, a compressor (1) for compressing the refrigerant, a condenser (2) isocondensing the compressed refrigerant, a capillary tube (3) for adiabatic expansion of the condensed refrigerant, It consists of an evaporator 4 which evaporates the expanded refrigerant isostatically.

In addition, a condenser fan 2a driven uniformly to cool the condenser 2 and an evaporator fan 4a driven uniformly to promote heat exchange between the air in the food storage chamber and the evaporator 4 are further included. It is done.

However, there is a problem in that the refrigerant flow noise, or noise, is generated as the refrigerant flowing along the pipe of the refrigeration cycle is periodically changed. First, the reason for the periodic flow change of the refrigerant can be seen by examining the flow of the refrigerant passing through the capillary end and the evaporator inlet during operation of the refrigerator. However, in an actual refrigeration cycle, it is not completely distinguished and circulates in a mixture of liquid and gaseous states. Therefore, the refrigerant mixed in gas and liquid state periodically flows from the capillary to the inlet of the evaporator. A flow change occurs. Next, a method and means for detecting a cycle of flow change are as follows. As described above, the refrigerant flow noise generated in the process of flowing into the inlet of the evaporator from the capillary tube during the normal operation of the refrigeration cycle is described in the already known Patent Publication No. 1996-2572 (Patent Application No. 1991-3973). This can be detected directly or indirectly through a microphone or vibration detector, and is a viewing tube that can look into the capillary constituting the refrigeration cycle and the evaporator inlet connected to it in a laboratory (generally called sight glass). The period of the flow change can be measured by directly observing the flow change of the refrigerant. In other words, the method of detecting the cycle of the flow change is performed by measuring vibration or noise in a laboratory or the like. For reference, indirect noise detection through the above-mentioned vibration or direct noise detection using a microphone may be applied. The flow change cycle detection method and means based thereon are also disclosed in well-known publication No. 1995-10381 (Patent Application No. 1991-20405), it can be seen that the flow change cycle detection can be easily performed. On the other hand, the coolant flow sounds, because the user is perceived as a noise to give inconvenience, a technique for reducing it is required.

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Based on the necessity described above, an object of the present invention is to provide a method for reducing abnormal noise caused by a refrigerant by disturbing refrigerant flow in a pipe.

In order to achieve the above object, the present invention, in a refrigerator having an evaporator and an evaporator fan, a condenser and a condenser fan, in order to reduce the abnormal sound generated by the periodic flow change of the refrigerant flowing along the pipe, It provides a noise reduction method of the refrigerator for periodically changing the RPM of the condenser fan in conjunction with the abnormal sound generation cycle.

Here, the RPM fluctuation period of the evaporator fan or the condenser fan preferably has a pattern for canceling the abnormal sound generation period in conjunction with the abnormal sound generation period.

Therefore, according to the present invention, as the RPM fluctuation period of the fan is changed in conjunction with the abnormal sound generation period to reduce the abnormal sound due to the refrigerant flow.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a graph showing an abnormal sound generated by refrigerant flow and an RPM of a fan according to the present invention, and FIG. 3 is a graph showing a pattern for canceling an abnormal sound generating cycle according to the present invention.

Prior to the description of the drawings, since the refrigerator has been mentioned in the related art, the description thereof will be omitted, and only the same structure as the conventional art will be given the same reference numeral.

As shown in FIG. 2, the noise reduction method of the refrigerator according to the present invention includes an evaporator (see 4 of FIG. 1), an evaporator fan (see 4a of FIG. 1), a condenser (see 2 of FIG. 1), and a condenser fan ( In the refrigerator having 2a of FIG. 1), the RPM of the evaporator fan 4a or the condenser fan 2a is periodically varied in conjunction with the abnormal sound generation period, and thus the periodic flow change of the refrigerant flowing along the pipe. It is a method for reducing the abnormal sound generated by the.

Here, the RPM variation period 20 of the evaporator fan 4a or the condenser fan 2a cancels the abnormal sound generation period in conjunction with the abnormal sound generation period 10, as shown in FIG. 3. It is preferable to have a pattern to make.

In addition, the RPM fluctuation period of the evaporator fan 4a or the condenser fan 2a is preferably adopted n times of the abnormal sound generation period, as shown in FIG. This is because it is difficult to change the RPM of the fan accordingly when the abnormal noise generation period is extremely short, and the refrigerant flow can be sufficiently disturbed even if n times is taken. In this case, n does not mean infinity, but means the minimum value of the range that can change the RPM of the fan.

2 and 3, the noise reduction method of the refrigerator according to the present invention will be described in detail.

First, as the RPM of the evaporator fan 4a is changed periodically as described above to control the amount of cold air flowing through the surface of the evaporator 4, the heat load applied to the evaporator is periodically changed to artificially change the refrigerant flow in the pipe. Done. At this time, the RPM fluctuation period of the evaporator fan 4a has a pattern for canceling the abnormal sound generation period as described above, and takes n times the abnormal sound generation period as necessary.

Here, the offset pattern will be described in more detail. When the RPM of the evaporator fan 4a is increased, the heat load, that is, the refrigerant pressure is increased, and the refrigerant pressure is decreased when the RPM of the evaporator fan is decreased, and when the refrigerant pressure is increased, the evaporator is used. The lower the RPM of the fan to lower the refrigerant pressure and when the refrigerant pressure is reduced by increasing the RPM of the evaporator fan to increase the refrigerant pressure, it is a pattern that minimizes the abnormal noise due to the refrigerant flow change.

Secondly, as the RPM of the condenser fan 2a is periodically varied to control the air flow rate flowing through the surface of the condenser 2, the amount of heat dissipation from the condenser is periodically changed so that the refrigerant flow in the pipe is artificially changed. do. At this time, the RPM fluctuation period of the condenser fan is omitted because it is the same as the RPM fluctuation period of the evaporator fan described above.

As a result, in order to reduce the abnormal sound, if necessary, the RPM of the evaporator fan 4a may be periodically varied in conjunction with the abnormal sound generating period, or the RPM of the condenser fan 2a in conjunction with the abnormal sound generating period. It may be varied periodically, the RPM of the evaporator fan (4a) and the condenser fan (2a) may be periodically changed in conjunction with the abnormal sound generation cycle at the same time.

Therefore, according to the noise reduction method of the refrigerator according to the present invention, the RPM variation cycle of the fan is variable in conjunction with the abnormal sound generation period to reduce the abnormal noise due to the flow of the refrigerant.

So far, the present invention has been described with reference to the preferred embodiments, and those skilled in the art to which the present invention pertains to the detailed description of the present invention and other forms of embodiments within the essential technical scope of the present invention. Could be implemented. Here, the essential technical scope of the present invention is shown in the claims, and all differences within the equivalent range will be construed as being included in the present invention.

As described above, the present invention has the following effects by providing a noise reduction method of the refrigerator.

According to the present invention, as the RPM variation cycle of the fan is changed in conjunction with the abnormal sound generation period, there is an advantage that the abnormal sound generation period is disturbed to reduce the occurrence of abnormal noise due to the refrigerant flow.

1 is a block diagram showing a refrigeration cycle of a typical refrigerator.

2 is according to the present invention, a graph showing the relationship between the abnormal noise generated by the refrigerant flow and the RPM of the fan.

Figure 3 as in accordance with the present invention, a graph showing a pattern for canceling the abnormal sound generation period.

Explanation of symbols for main parts of the drawings

2: condenser 2a: condenser fan

4: evaporator 4a: evaporator fan

10: abnormal sound generation cycle 20: RPM variation cycle

Claims (3)

In a refrigerator having an evaporator and an evaporator fan and a condenser and a condenser fan, Noise reduction of the refrigerator, characterized in that to change the RPM of the evaporator fan or the condenser fan periodically in conjunction with the abnormal sound generation period in order to reduce the abnormal sound generated by the periodic flow change of the refrigerant flowing along the pipe. Way. The method of claim 1, RPM variation period of the evaporator fan or the condenser fan, the noise reduction method of the refrigerator, characterized in that having a pattern to cancel the abnormal sound generation period in conjunction with the abnormal sound generation period. The method of claim 1, RPM change period of the evaporator fan or the condenser fan, noise reduction method of the refrigerator, characterized in that n times of the abnormal sound generation period.