JP2005283012A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator suppressing vibration of an evaporation pipe, and effectively promoting evaporation of defrost water stored in an evaporating dish. <P>SOLUTION: The refrigerator is provided with the evaporating dish 30 evaporating the defrost water from an evaporator 7 arranged in a machine chamber 2, and the evaporation pipe 50 connected to a discharge pipe 21 of a compressor 20 and arranged in a position separated upward from a bottom face of the evaporating dish 30. It is composed such that the evaporation pipe 50 is formed in a meandering state with a predetermined amplitude, and an amplitude L1 of an inlet side piping 51 connected to the discharge pipe 21 of the compressor 20 is larger than an amplitude L4 of an outlet side piping 55. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a refrigerator provided with an evaporating dish for evaporating defrost water installed near a compressor in a machine room.

  Conventionally, the machine room formed at the lower back of the refrigerator has been provided with an evaporating dish along with a compressor and various pipes for a refrigeration cycle. This evaporating dish drains defrosted water generated by the evaporator during defrosting. The defrosted water is heated and evaporated by using the amount of heat of the compressor, the condenser, and the like.

  As one form of using the amount of heat, since the discharge pipe temperature from the compressor is about 60 to 80 ° C., the discharge pipe (hereinafter referred to as the evaporation pipe) is spaced upward from the bottom surface of the evaporating dish. There is a form that promotes evaporation of defrost water stored in the evaporating dish using the evaporation pipe as a heat source (for example, Patent Document 1).

  In this case, if there is a large amount of defrosted water stored in the evaporating dish, the evaporation pipe is immersed in the water to heat the defrosted water directly and promote evaporation directly. Since an evaporation pipe is located above the water surface, evaporation is promoted indirectly.

On the other hand, the machine room has space restrictions due to the relationship with the storage room space, and it is preferable to secure a heat source for the evaporation pipe in the smallest possible area. Heat is effectively secured even in spaces.
JP 2000-337752 A

  However, in the conventional refrigerator, noise may be generated due to the vibration of the evaporation pipe, and it is necessary to prevent this.

The closer the evaporating pipe is to the bottom of the evaporating dish, the shorter the distance to the heat source even when there is little defrost water, which can effectively promote evaporation, but when starting the compressor, etc. Due to the large vibration, the directly connected evaporation pipe also vibrates, so that the pipe may collide with the evaporation dish and generate noise.
For this reason, if there is no problem of noise due to vibration, it is preferable to make them close to each other for the above reasons, but the evaporation pipe and the evaporation dish have to be spaced apart from each other.

  On the other hand, as a method for preventing the vibration, there is a method of suppressing the vibration from the compressor by supporting the inlet side pipe of the evaporation pipe with a fixture as disclosed in Patent Document 1. In this case, separate parts are required and the assembling work becomes complicated, and it is expensive and is not preferable from an economical viewpoint. Further, if the piping of the evaporation pipe is shortened, such vibration can be suppressed, but this may not be able to secure a sufficient heat source.

  The present invention has been made paying attention to this point, and provides a refrigerator capable of preventing the generation of noise by suppressing the vibration of the evaporation pipe and effectively evaporating the defrosted water stored in the evaporating dish. The purpose is to do.

  In order to solve the above problems, a refrigerator according to the present invention includes a machine room provided in a lower rear portion of a refrigerator main body and having a compressor that forms a part of a refrigeration cycle therein, and an evaporator disposed in the machine room. An evaporating dish for evaporating defrost water and an evaporating pipe connected to a discharge pipe of the compressor and disposed at a position spaced upward from the bottom surface of the evaporating dish, the evaporating pipe meandering with a predetermined amplitude It is characterized in that the amplitude of the inlet side pipe formed in a shape and connected to the discharge pipe of the compressor is larger than the amplitude of the outlet side pipe.

  ADVANTAGE OF THE INVENTION According to this invention, the refrigerator which suppresses the vibration of an evaporation pipe and accelerates | stimulates the evaporation of the defrost water stored in the evaporating dish effectively can be provided.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a perspective view showing the machine room of the refrigerator according to the present invention, and the machine room 2 is arranged at the bottom of the back surface of the refrigerator body 1.

  On the left side of the machine room 2 as viewed from the back, a compressor 20 for compressing refrigerant is attached and fixed to a bottom plate 3 constituting the bottom surface of the machine room 2 via a rubber cushion rubber 4. A condenser 6 for condensing the refrigerant discharged from the compressor 10 is installed in front of.

  An evaporator 7 that cools the inside of the refrigerator is disposed inside the refrigerator main body 1 on the back side, and below this evaporator 7 is a heater 8 that heats by energization to defrost the evaporator 7, In addition, a trough 9 and a drain pipe 10 that receive defrosted water by defrosting and drain it to the evaporating dish 30 provided outside the warehouse are disposed.

  On the side of the compressor 20, a heat dissipating fan 5 that radiates heat from the compressor 20 and the condenser 6, and an evaporating dish 30 that stores and evaporates the defrosted water drained from the drain pipe 10 are formed on the bottom plate 3. Installation is fixed. As shown in FIG. 1 which is a perspective view of the evaporating dish 30 and the evaporating pipe 50, the evaporating dish 30 is formed in a box shape having an upper surface opened by a flame-retardant synthetic resin or the like. A drain outlet 31 for draining water is provided.

  The discharge pipe 21 of the compressor 20 is connected to the inlet side pipe 51 of the evaporation pipe 50 through the muffler 22, and the outlet side pipe 55 of the evaporation pipe 50 is connected to the condenser 6. Further, the outlet side of the condenser 6 is connected to the evaporator 7 via a heat radiating pipe or a capillary tube (not shown), and the outlet side of the evaporator 7 is connected to the suction pipe 23 of the compressor 20.

  As shown also in FIG. 2, which is a cross-sectional view taken along the line AA in FIG. 1, from the bottom of the evaporating dish 30 so as not to collide even if the evaporating pipe 50 oscillates due to a large vibration of the compressor 20 at the time of startup. It is arranged at a position separated by a predetermined distance, for example, about 20 mm.

  As shown in FIG. 1 and FIG. 4 which is a top view, the evaporation pipe 50 is a hollow pipe formed from copper or the like from the inlet side 51 to the outlet side 55, and from the front to the back of the machine room 2 in the drawing. Bent in a meandering manner. Specifically, after meandering and bending downward from the center, it is bent so that its amplitude decreases from the entrance side to the exit side on the same plane, and the exit side Is bent upward.

The amplitudes from the entrance side to the exit side are set so as to satisfy the equation 1 when L ₁ , L ₂ ... L _n−1 , L _n are determined in order. is set so that _{L n -Ln-1 = 0.20L 1} .

  This is obtained from the results of a simulation performed by the inventor, and suppresses the vibration of the evaporation pipe even when the compressor 20 is vibrated due to the starting characteristics of the motor, such as when the compressor 20 is started. is there.

Specifically, in addition to the evaporation pipe of the present invention as shown in FIG. 4, the evaporation pipe having a large amplitude from the inlet side pipe 51 to the outlet side pipe 55 as shown in FIG. 5, and FIG. As shown in Fig. 5, the evaporating pipe having the same amplitude was used, and vibration was given to the inlet side, and the maximum displacement in the vertical direction due to each vibration was measured. In this case, the entire length of the evaporation pipe was set to be the same (here, 810 mm), and the vibration in the vertical direction (here, 1 N) estimated from the maximum vibration at the start-up of the compressor 20 was given as the vibration. The results are shown in Table 1.

  From this result, the evaporation pipe having a large amplitude from the inlet side 51 to the outlet side 55 has the largest displacement amount of 7.2 mm, and the evaporation pipe of the present invention is also an evaporation pipe having the same amplitude. Compared to 50, the maximum displacement amount was increased by 1.5 mm. This is because vibration is easily absorbed when the amplitude is large, and by absorbing the large initial vibration propagated in the inlet-side pipe 51 having a large amplitude at an early stage, the vibration remaining in the subsequent stage portion is attenuated. It is estimated that the amount of displacement could be minimized.

  Next, the inventor performed a simulation on the relationship between the amount of change in amplitude and the vibration characteristics.

Specifically, the evaporation according to the present invention in which the rate of change C is sequentially changed (0.00, 0.11, 0.15, 0.19, 0.25, 0.30) while satisfying the relationship of Equation 2. The pipe 50 was caused to vibrate and the maximum amount of change was investigated. In this case, from the inlet side pipe 51 to the outlet side pipe 55,
The respective amplitudes are determined in order as L ₁ , L ₂ , L ₃ , and L _4, and the total length of the evaporation pipe is set to be the same (here, 810 mm). In addition, as the vibration, the vertical vibration (here, 1N) estimated from the maximum vibration at the time of starting the compressor 20 was applied to the inlet side pipe 51. The result is shown in the graph of FIG.

From this result, the maximum displacement amount of the evaporation pipe 50 was the smallest when the change amount C was in the range of 0.15 to 0.25. This is because if the amplitude is large, vibration can be easily absorbed and the amount of displacement can be suppressed, but conversely if the amount of change in amplitude is too large, the amount of displacement of the inlet side pipe 51 becomes large and the maximum amount of displacement. Is estimated to increase.

  As described above, according to the configuration of the present invention, the evaporation pipe 50 is formed in a meandering shape with a predetermined amplitude, and the amplitude L1 of the inlet side pipe 51 connected to the discharge pipe 21 of the compressor 20 is set to the outlet side pipe 55. By setting it to be larger than the amplitude L4, even if the vibration of the compressor 20 is propagated, the displacement amount due to the vibration can be suppressed as compared with the conventional evaporation pipe 50. For this reason, the arrangement position of the evaporating pipe 50 can be brought as close to the bottom surface of the evaporating dish 30 as much as possible, so that heat conduction is improved and evaporation of defrost water can be promoted effectively.

  Further, according to the configuration of the present invention, the meandering portions of the evaporation pipe 50 are provided in a plurality of rows, and the amplitude is gradually reduced from the inlet side pipe 51 toward the outlet side pipe 55, thereby reducing the space. While effective defrosting can be promoted, the amount of displacement due to vibration can be suppressed as much as possible.

Furthermore, according to the configuration of the present invention, when the amplitude from the inlet side pipe 51 toward the outlet side pipe 55 is set to L ₁ , L ₂ ... L _n−1 , L _n in order, 0. Since the relationship of 15L ₁ ≦ L _n −L _n−1 ≦ 0.25L ₁ is set, the displacement of the evaporation pipe 50 due to vibration can be minimized.

  The configuration described above is an embodiment of the present invention, and various modifications can be made without departing from the scope of the invention. For example, in the evaporation pipe of the present embodiment, the meandering has four rows, but it is possible to reduce or increase the number more appropriately.

  INDUSTRIAL APPLICABILITY The present invention can provide a refrigerator that suppresses vibration of the evaporation pipe and effectively promotes evaporation of defrosted water stored in the evaporation dish, and can be applied to various refrigerators equipped with an evaporation pipe.

It is a perspective view which shows the evaporation pipe and evaporation tray of this invention. It is sectional drawing which follows the AA line of FIG. It is a perspective view which shows the machine room arrange | positioned in the refrigerator of this invention. It is a top view which shows the evaporation pipe of this invention. It is a top view which shows the evaporation pipe which enlarged the amplitude toward the exit side from the entrance side. It is a top view which shows the evaporation pipe which made the amplitude of the entrance side and the exit side the same. It is a graph which shows the relationship between the variation | change_quantity of an amplitude, and the maximum displacement amount of the evaporation pipe by a vibration.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body 2 ... Machine room 6 ... Condenser 7 ... Evaporator 20 ... Compressor 21 ... Discharge pipe 22 ... Suction pipe 30 ... Evaporation dish 50 ... Evaporation pipe 51 ... Inlet side piping 55 ... Outlet side piping

Claims (3)

A machine room provided with a compressor which is provided at the lower back of the refrigerator main body and forms a part of the refrigeration cycle, an evaporating dish disposed in the machine room for evaporating defrosted water from the evaporator, and the compressor An evaporation pipe connected to a discharge pipe and disposed at a position spaced upward from the bottom surface of the evaporating dish. The evaporation pipe is formed in a meandering shape with a predetermined amplitude and connected to the discharge pipe of the compressor. A refrigerator characterized in that the amplitude of the inlet side piping is made larger than the amplitude of the outlet side piping. The refrigerator according to claim 1, wherein meandering of the evaporating pipe is provided in a plurality of rows, and the amplitude is gradually reduced from the inlet side pipe toward the outlet side pipe. When the amplitude from the inlet side pipe toward the outlet side pipe is set as L ₁ , L ₂ ... L _n−1 , L _n in this order, 0.15 L ₁ ≦ L _n −L _n −1 ≦ 0. the refrigerator according to claim 2, characterized in that it satisfies the relationship 25L _1.

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