WO2005093347A1 - 冷却庫およびスターリング冷却庫ならびにドレン水処理システム - Google Patents
冷却庫およびスターリング冷却庫ならびにドレン水処理システム Download PDFInfo
- Publication number
- WO2005093347A1 WO2005093347A1 PCT/JP2005/005210 JP2005005210W WO2005093347A1 WO 2005093347 A1 WO2005093347 A1 WO 2005093347A1 JP 2005005210 W JP2005005210 W JP 2005005210W WO 2005093347 A1 WO2005093347 A1 WO 2005093347A1
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- WIPO (PCT)
- Prior art keywords
- drain pan
- drain
- refrigerator
- defrost water
- water
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/14—Collecting or removing condensed and defrost water; Drip trays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2323/00—General constructional features not provided for in other groups of this subclass
- F25D2323/002—Details for cooling refrigerating machinery
- F25D2323/0021—Details for cooling refrigerating machinery using air guides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2500/00—Problems to be solved
- F25D2500/02—Geometry problems
Definitions
- the present invention relates to a refrigerator (RefrigeratorZFreezer) and a Stirling refrigerator (Stirling
- Refrigerator ZFreezer and drainage water treatment systems, and more particularly to coolers and Stirling coolers that promote evaporation of defrost water and drainage water treatment systems.
- a cooler provided with an evaporating dish (a drain pan) for collecting defrost water generated when performing a defrosting process is also conventionally known.
- Japanese Patent Application Laid-Open No. H11-6680 discloses a refrigerator provided with an evaporating means for forming a flow of air in a predetermined direction near an evaporating dish. This makes it possible for the evaporated water vapor to smoothly escape to the outside.
- Patent Document 1 JP-A-11 6680
- Patent Document 2 Japanese Patent Laid-Open No. 2003-50073 Disclosure of the invention
- the heating means it is required to suppress an increase in energy consumption. Therefore, for example, in a compressor-type refrigerator having a compressor, heat generated in the compressor is used. Thereby, evaporation of the defrost water without providing a new heating means can be promoted.
- a Stirling refrigerator having a high-temperature portion is installed above the refrigerator while compressing the high-temperature portion of the refrigerator. It cannot be used as a heating means in place of a machine.
- the cooling box according to Conventional Example 1 has a heating source such as a compressor, and it is premised that the defrosting water is evaporated by the heating source. Therefore, the premise and configuration are completely different from those of the Stirling cooler according to the present invention.
- the conventional refrigerator has the following problem.
- the conventional drain water treatment system has the following problem.
- the initial temperature of the drain water discharged by the defrosting process is lower than the dew point temperature of the surrounding environment.
- the moist air in contact with the drain water may condense and conversely increase the amount of drain water.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a cooler, a Stirling cooler, and a drain water treatment system that promote the evaporation of defrost water. Is to do.
- the cooling box according to the present invention is provided near the cooling box body, a drain pan for storing defrost water from the cooling box body, and stored in the drain pan.
- a fan that generates airflow toward the defrost water
- a turbulence promoter that promotes turbulence.
- the turbulence promoting body is mounted below the bottom of the cooling cabinet main body, and the distance between the turbulence promoting body and the end of the drain pan on the fan side also corresponds to the height of the drain pan bottom surface to the height to the cooling cabinet main body bottom surface.
- the ratio is greater than 1 and 6 or less.
- the maximum height of the turbulence promoter is smaller than the distance between the upper end of the drain pan and the bottom of the cooling box main body.
- Height force at the center of the turbulence promoter in the width direction of the flow path of the air flow which is orthogonal to the direction of the air flow flowing from the upstream side to the downstream side of the air flow. It is preferably larger than the height of both ends.
- the cooling box according to the present invention is provided near the cooling box body and a drain pan for storing defrost water having the power of the cooling box body, and is stored in the drain pan.
- the cooling box according to the present invention is provided near the cooling box body, a drain pan for storing defrost water having a cooling box power, and stored in the drain pan.
- an evaporation promoting means is attached to the drain pan.
- a Stirling cooler includes: a cooler body including a Stirling refrigerator having a low-temperature portion and a high-temperature portion; and a cooling room cooled by cold heat from the low-temperature portion; It has a drain pan for storing the defrost water of the main body power, and a fan for generating an airflow toward the defrost water stored in the drain pan.
- the airflow makes it easier for dry air to be supplied onto the drain pan. As a result, a Stirling cooler with improved evaporation efficiency of defrost water is provided.
- the Stirling cooler according to the present invention includes a drain water treatment system described below. Also in this aspect, a Stirling cooler with improved defrost water evaporation efficiency is provided.
- the drain water treatment system includes a drain pan that stores drain water containing defrost water generated by defrost processing, and a fan that generates an airflow toward the drain water.
- the fan is stopped during the defrosting process, and the operation of the fan is started after a lapse of a predetermined time from the end of the defrosting process.
- the drain water treatment system further includes a heating unit attached to the drain pan, and operates the heating unit after the start of the defrosting process and before the lapse of the predetermined time.
- the heating means by providing the heating means, the time required for the temperature of the drain water to reach the dew point of the surrounding environment can be reduced. As a result, the drainage water treatment efficiency can be further improved.
- the heating means is included in a heat medium circulation circuit using a circulation pump, and the output of the circulation pump after the completion of the defrosting process is equal to the output of the circulation pump before the start of the defrosting process.
- the output is higher than the output of the ring pump.
- the refrigerator is operated in the high output mode, and the amount of waste heat increases. Therefore, by setting the output of the circulation pump after the defrosting process to be high, the waste heat can be effectively used, and the treatment efficiency of the drain water can be further improved.
- evaporation of defrost water can be promoted.
- FIG. 1 is a diagram showing a Stirling cooler according to Embodiment 1 of the present invention.
- FIG. 2 is a diagram showing a Stirling refrigerator in a Stirling cooler according to Embodiment 1 of the present invention.
- FIG. 3 is a side view showing a drain pan and its peripheral members in the Stirling cooler according to Embodiment 1 of the present invention.
- FIG. 4 is a side view showing a modified example of the drain pan shown in FIG. 3 and its peripheral members.
- FIG. 5 is a side view showing another modified example of the drain pan shown in FIG. 3 and its peripheral members.
- FIG. 6 is a side view showing a drain pan and its peripheral members in a Stirling cooler according to Embodiment 2 of the present invention.
- FIG. 7 is a top view showing a drain pan and its peripheral members in a Stirling cooler according to Embodiment 2 of the present invention.
- FIG. 8 is a front view showing a drain pan and its peripheral members in a Stirling cooler according to Embodiment 2 of the present invention.
- FIG. 9 is a perspective view showing a turbulence promoting body attached to the Stirling cooler according to Embodiment 2 of the present invention.
- FIG. 10 is a perspective view showing a modified example of the turbulence promoting body attached to the Stirling cooler according to Embodiment 2 of the present invention.
- FIG. 11 is a side view showing a modified example of the drain pan shown in FIG. 6 and its peripheral members.
- FIG. 12 is a side view showing a drain pan and its peripheral members in a Stirling cooler according to Embodiment 3 of the present invention.
- FIG. 13 is a side view showing a drain pan and its peripheral members in a Stirling cooler according to Embodiment 4 of the present invention.
- FIG. 14 is a view for explaining the relationship between the specifications of the ventilation system and the amount of evaporation of defrost water.
- FIG. 15 is a diagram showing a Stirling cooler according to Embodiment 5 of the present invention.
- FIG. 16 is a flowchart showing a flow of drain water treatment in a Stirling cooler according to Embodiment 5 of the present invention.
- FIG. 17 is a timing chart for a drain water treatment system in a Stirling cooler according to Embodiment 5 of the present invention.
- FIG. 18 is a view showing an experimental device for obtaining a relationship between an operation time of a blower fan and an amount of evaporation of drain water.
- FIG. 19 is a diagram showing the relationship between the operation time of a blower fan and the amount of evaporation of drain water.
- the "refrigerator” is a concept including all of “refrigerator”, “freezer” and “freezer”. Also, in each of the embodiments described below, the power of the present invention will be described only when the concept of the present invention is applied to a Stirling cooler. The application of the concept to non-Stirling coolers is initially planned.
- FIG. 1 is a diagram showing a Stirling cooler according to the first embodiment.
- Stirling cooler 1 includes at least one of a freezing space and a refrigerated space as a cooling space.
- the Stirling refrigerator 2 includes a worm head (high temperature part) and a cold head (low temperature part).
- the Stirling cooler 1 exchanges heat between the high-temperature side heat transfer cycle (radiation system) for cooling the warm head of the Stirling refrigerator 2 and the cold head of the Stirling refrigerator 2 inside the refrigerator. Equipped with a low-temperature heat transfer cycle (endothermic system).
- the low-temperature heat transfer cycle is performed by the low-temperature condenser 6 attached to the periphery of the cold head of the Stirling refrigerator 2 and the low-temperature refrigerant passage 6 including the low-temperature return pipe and the low-temperature conduit.
- This is a circulation circuit composed of the low-side evaporator 5 connected to the side condenser.
- the low-temperature-side return pipe and the low-temperature-side conduit that are separated from each other are collectively indicated as a low-temperature-side refrigerant passage 6.
- the circulation circuit carbon dioxide, hydrocarbon, and the like are sealed as a refrigerant.
- the refrigerant condensed in the low temperature side condenser reaches the low temperature side evaporator 5 via the low temperature side conduit.
- heat exchange is performed by evaporating the refrigerant.
- the gasified refrigerant returns to the low-temperature condenser through the low-temperature return pipe.
- the low-temperature side evaporator 5 is arranged below the low-temperature side condenser so that the cold generated by the cold head can be transmitted by utilizing the natural circulation by the evaporation and condensation of the refrigerant. I have.
- the Stirling refrigerator 2 is arranged at the upper part on the back surface of the refrigerator main body 1A.
- the heat absorption system is located on the back side of the cooling cabinet main unit 1B, and the heat dissipation system is located on the top side of the cooling cabinet main unit 1A.
- the low-temperature side evaporator 5 is installed in a cool air duct 5A provided on the back side 1B of the cooling cabinet body, and the high-temperature side condenser 3 is installed in a duct 3A provided on the top of the cooling cabinet body 1A.
- the cold generated by the cold head of the Stirling refrigerator 2 is exchanged with the air in the cool air duct 5 A via the low-temperature side evaporator 5.
- the cold air cooled by the low-temperature side evaporator 5 is blown into the cooling chamber (cooling space) by the cooling fan 7 in the chamber.
- the warmed airflow from the cooling space is sent again to the low-temperature side evaporator 5 through the cool air duct 5A, and is repeatedly cooled.
- frost is formed in the cooling chamber (for example, around the low-temperature side evaporator 5).
- defrosting is performed by appropriately adjusting the flow of the refrigerant.
- defrost water is generated.
- the defrost water is guided from the cool air duct 5A through the drain nove 8 to a drain pan 9 (evaporating dish) installed at the lower part of the bottom 1C of the cooler body.
- a blower fan 10 is provided, and the blower fan 10 forms an airflow near the surface of the defrost water accumulated in the drain pan 9, thereby supplying relatively dry air onto the defrost water. Therefore, evaporation of the defrost water is promoted.
- FIG. 2 is a side sectional view showing an example of the structure of the Stirling refrigerator 2.
- the Stirling refrigerator 2 of the present embodiment includes a casing 102, a cylinder 103 attached to the casing 102, a piston 104 reciprocating in the cylinder 103, and a displacer 105.
- a regenerator 106 an operating space 107 including a compression space 107a and an expansion space 107b, a radiator (warm head) 108, a heat absorber (cold head) 109, and a linear motor 113 as piston driving means.
- the casing 102 is a part that constitutes an outer shell (outer wall) of the Stirling refrigerator 2, and various parts including the cylinder 103 are assembled to the casing 102.
- the casing 102 is not formed of a single container, and defines a back pressure space 117 and a vessel portion for receiving the linear motor 113, the piston spring 114 and the displacer spring 115, a heat radiating portion 108, It is mainly composed of the regenerator 106 and the outer wall of the heat absorbing section 109.
- the inside of the casing 102 is filled with a working medium such as helium gas, hydrogen gas, or nitrogen gas.
- the cylinder 103 has a substantially cylindrical shape, and internally receives the piston 104 and the displacer 105 in a reciprocating manner.
- the piston 104 and the displacer 105 are coaxially spaced apart from each other, and the piston 104 and the displacer 105 divide the working space 107 in the cylinder 103 into a compression space 107a and an expansion space 107b. Is done.
- the working space 107 is a space located closer to the displacer 105 than the end surface of the piston 104 on the displacer 105 side, and a compression space 107a is formed between the piston 104 and the displacer 105, and An expansion space 107b is formed between the heat absorbing portion 109 and the heat absorbing portion 109.
- the compression space 107a is mainly surrounded by the heat radiation part 108, and the expansion space 107b is mainly surrounded by the heat absorption part 109.
- a regenerator 106 is provided between the compression space 107a and the expansion space 107b, and these two spaces communicate with each other via the regenerator 106. Thereby, a closed circuit is formed in the Stirling refrigerator 2. The working medium enclosed in the closed circuit flows in accordance with the operations of the piston 104 and the displacer 105, thereby realizing a reverse Stirling cycle.
- a linear motor 113 is provided in a back pressure space 117 located outside the cylinder 103.
- the rear motor 113 has an inner yoke 110, a movable magnet part 111, and an outer yoke 112.
- the linear motor 113 drives the piston 104 in the axial direction of the cylinder 103.
- One end of the piston 104 is connected to a piston spring 114 composed of a plate panel or the like.
- the piston spring 114 functions as elastic force applying means for applying an elastic force to the piston 104.
- the piston 104 can reciprocate in the cylinder 103 more stably and periodically.
- One end of the displacer 105 is connected to a displacer spring 115 via a displacer rod 116.
- the displacer rod 116 is disposed so as to penetrate the piston 104, and the displacer spring 115 is composed of a panel panel or the like.
- the periphery of the displacer spring 115 and the periphery of the piston spring 114 are supported by a support member extending from the linear motor 113 to the back pressure space 117 side of the piston 104 (hereinafter sometimes referred to as the rear).
- a vessel portion of the casing 102 is provided on the side opposite to the displacer 105 with respect to the piston 104.
- a back pressure space 117 surrounded by minutes is provided on the side opposite to the displacer 105 with respect to the piston 104.
- the back pressure space 117 includes an outer peripheral region located around the piston 104 in the vessel portion of the casing 102, and a rear region located on the piston spring 114 side (rear side) of the piston 104 in the vessel portion of the casing 102. including.
- the working medium also exists in the back pressure space 117.
- the linear motor 113 is operated to drive the piston 104.
- the piston 104 driven by the linear motor 113 approaches the displacer 105 and compresses the working medium (working gas) in the compression space 107a.
- the high-pressure working medium that has flowed into the expansion space 107b expands when the displacer 105 moves toward the piston 104 (the rear end of the vessel portion of the casing 102). As the displacer 105 moves rearward, the center of the displacer spring 115 also deforms so as to protrude rearward.
- the temperature of the working medium in the expansion space 107b decreases due to the expansion of the working medium in the expansion space 107b, but external heat is transferred to the expansion space 107b by the heat absorbing portion 109. Therefore, the inside of the expansion space 107b is maintained at a substantially constant temperature. That is, this process corresponds to the isothermal expansion process of the reverse Stirling cycle.
- the displacer 105 starts to move in a direction in which the force of the piston 104 also moves away.
- the working medium in the expansion space 107b passes through the regenerator 106 and returns to the compression space 107a. Return to the side.
- the heat stored in the regenerator 106 is given to the working medium, the temperature of the working medium rises. That is, this process corresponds to an equal volume heating process of the reverse Stirling cycle.
- FIG. 3 is a side view showing a drain pan unit including the drain pan 9 and its peripheral members (blower fan 10) in the Stirling cooler 1.
- the broken line on the drain pan 9 indicates the lower surface of the bottom surface 1C of the cooling cabinet main body, that is, the upper surface of the flow path of the airflow from the blower fan 10, and the inside of the drain pan 9
- the dotted line indicates the surface of the defrosted water stored in the drain pan 9.
- blower fan 10 generates an airflow toward the defrost water stored in drain pan 9. As a result, relatively dry air is supplied onto the defrost water, and the evaporation of the defrost water is promoted.
- FIG. 4 and FIG. 5 are side views showing modified examples of the drain pan unit shown in FIG.
- blower fan 10 generates an airflow in a direction perpendicular to the surface of the defrost water. Accordingly, a vertical collision jet colliding with the surface of the defrost water is generated, and the evaporation efficiency of the defrost water can be further increased.
- blower fan 10 may generate an airflow obliquely to the surface of the defrost water. Also in this case, similarly to the case shown in FIG. 4, an oblique collision jet collides with the surface of the defrost water, and the evaporation efficiency of the defrost water can be further increased.
- the evaporation efficiency of the defrost water can be improved by providing the blower fan 10 that generates an airflow toward the defrost water stored in the drain pan 9.
- FIG. 6 is a side view showing the drain pan and its peripheral members in the Stirling cooler according to the second embodiment.
- FIG. 7 is a top view of the drain pan unit shown in FIG. 6, and
- FIG. 8 is a front view thereof.
- FIG. 6 corresponds to a state in which the drain pan unit in the VI-VI direction in FIG. 7 is viewed
- FIG. 8 is a view illustrating the drain pan unit in the VIII-VIII direction in FIG. Corresponds to the state.
- the Stirling cooler according to the present embodiment is a modification of the Stirling cooler according to the first embodiment, and similarly to the first embodiment, has a cooler main body 1A and a vicinity of cooler main body 1A.
- the drain pan 9 for storing the defrost water of the cooling cabinet main body 1 A power, and the defrost water stored in the drain pan 9 A blower fan 10 for generating an airflow is provided.
- a turbulence promoter (turbulence promoter) 11 for promoting turbulence of airflow from blower fan 10 is provided on drain pan 9. Different from form 1.
- the turbulence promoter 11 is attached to the lower surface of the cooling cabinet main body bottom surface 1C. Due to the installation of the turbulence promoter 11, the airflow from the blower fan 10 is disturbed downstream, and the destruction of the boundary layer (small wind speed! Layer) formed near the interface between the defrost water and the air is prevented. Promoted. As a result, the interface wind speed increases, and the evaporation of the defrost water is promoted.
- the turbulence promoting body 11 is provided with a vertical fluid (flow changer) that changes the flow of the airflow from the blower fan 10 or in the airflow from the blower fan 10. It functions as a vortex generator that generates vortex 12 (a vortex directed against defrost water).
- the turbulence promoting body 11 is an uneven portion provided on the bottom surface 1C of the cooling cabinet main body for directing the airflow from the blower fan 10 to the defrost water in the drain pan 9.
- the turbulence promoter 11 can be regarded as a drift plate. In any respect, the turbulence promoter enhances the evaporation efficiency of the defrost water by promoting the destruction of the boundary layer formed near the interface between the defrost water and the air.
- the inventor of the present application has studied and found that the distance (L in FIG. 6) between the tip of the turbulence promoter 11 and the end of the drain pan 9 on the side of the blower fan 10 (right side in FIG. 6)
- the ratio between the bottom of the drain pan and the height of the bottom of the cooling cabinet (H in Fig. 6) was found to change.
- FIG. 14 is a diagram showing the relationship between the value of LZH and the evaporation amount of defrost water.
- the evaporation ratio in Fig. 14 is the relative defrost water in each specification (LZH) when the evaporation amount of defrost water in the specification shown in Fig. 3 is 100 (%). It means the amount of evaporation.
- LZH the relative defrost water in each specification
- FIG. 14 the evaporation amount of the defrost water in the specification shown in FIG. 4 (vertical collision jet) and the specification shown in FIG. 5 (oblique collision jet) are also shown.
- the value of LZH is preferably greater than 1 and about 6 or less (typically about 2). Thereby, the improvement of the evaporation efficiency by the turbulence promoting body 11 can be reliably obtained.
- FIG. 14 does not show data on the amount of evaporation when the turbulence promoting body 11 is installed on the drain pan 9 under the conditions of the vertical impinging jet and the oblique impinging jet, Even in the case of a vertical impinging jet and an oblique impinging jet, installing the turbulence enhancer 11 (see, for example, FIG. 11) improves the evaporation efficiency of the defrost water in the drain pan 9 It is thought that. Also in this case, it is considered preferable to set LZH within the above-mentioned range of values.
- the maximum height (h) of turbulence promoter 11 is smaller than the distance (D) between the upper end of drain pan 9 and bottom 1C of the refrigerator main body.
- FIG. 9 is a perspective view showing the turbulence promoter 11.
- FIG. 10 shows a modification.
- the turbulence promoting body 11 has a triangular wing shape as shown in FIG. 9, and in another aspect, it has a trapezoidal wing shape as shown in FIG.
- the height (h) of the central portion in the width direction of the flow path of the turbulence promoter 11 is larger than the height of both ends in the force width direction.
- the width direction of the flow path means a direction (force flow direction) from the upstream side to the downstream side of the airflow from the blower fan 10 and a direction perpendicular thereto (see Figs. 9 and 10). .
- the turbulence promoting body 11 has the shape described above, the ventilation resistance by the turbulence promoting body 11 is relatively reduced at both ends in the width direction of the flow path. As a result, the effect of the airflow force from the blower fan 10 being diffused in the width direction of the flow path (see the broken line in FIG. 7) can be enhanced, and the evaporation efficiency of the defrost water is improved.
- FIG. 12 is a side view showing the drain pan and its peripheral members in the Stirling cooler according to the third embodiment.
- the Stirling cooler according to the present embodiment is a modified example of the Stirling cooler according to the above-described first embodiment. As shown in FIG. Embodiment 2 differs from Embodiment 1 in that a Z evaporation promoting means) is attached.
- the temperature of the drain pan 9 can be raised, so that the evaporation efficiency of the defrost water can be further improved in addition to the effect of the airflow from the blower fan 10. .
- FIG. 13 is a side view showing the drain pan and its peripheral members in the Stirling cooler according to the fourth embodiment.
- the Stirling cooler according to the present embodiment is a modified example of the Stirling cooler according to the above-described first embodiment. As shown in FIG.
- Embodiment 14 is different from Embodiment 1 described above in that 14 (vibration means Z evaporation promotion means) is attached.
- FIG. 15 shows a Stirling cooler according to the fifth embodiment.
- the Stirling cooler according to the present embodiment is a modified example of the Stirling cooler according to Embodiments 14 to 14, in which the waste heat of the worm head of Stirling refrigerator 2 is reduced. It is characterized in that the evaporation of drain water is promoted by utilizing.
- the Stirling cooler 1 is connected to the lower part of the high-temperature side evaporator 2A provided around the warm head of the Stirling refrigerator 2 and serves as another heat radiation system.
- a heat transfer cycle heat medium circulation circuit
- This heat transfer cycle is a circulation circuit including a high-temperature side evaporator 2A, a circulation pump 15, a refrigerant passage 16 including a return pipe and a conduit, and a hot pipe 17 attached to a drain pan 9.
- the return pipe and the conduit separated from each other are collectively shown as a refrigerant passage 16.
- Liquid-phase refrigerant flows from A into the refrigerant passage 16 (conduit).
- the refrigerant flowing into the refrigerant passage 16 is supplied to the hot pipe 17 via a circulation pump 15 provided below the Stirling refrigerator 4. Sent to The refrigerant flowing in the hot pipe 17 returns to the high-temperature side evaporator 2A via the refrigerant passage 16 (return pipe).
- a circulation pump 15 provided below the Stirling refrigerator 4.
- Sent to The refrigerant flowing in the hot pipe 17 returns to the high-temperature side evaporator 2A via the refrigerant passage 16 (return pipe).
- forced circulation by the circulation pump 15 is performed.
- the refrigerant flowing in the hot pipe 17 is kept at a relatively high temperature by the heat given from the worm head of the Stirling refrigerator 2. Therefore, by attaching the hot pipe 17 to the drain pan 9, the evaporation of the drain water stored in the drain pan 9 can be promoted. That is, it can be said that the hot pipe 17 according to the present embodiment is one form of the heater 13 (heating means) in the third embodiment.
- the initial temperature of the drain water discharged by the defrosting process of the Stirling cooler 1 and stored in the drain pan 9 is set to be lower than the dew point temperature of the surrounding environment.
- humid air in contact with the drain water may condense and increase the amount of drain water in the drain pan 9. It is important to control the operation of the blower fan 10 to suppress the occurrence of this phenomenon.
- FIG. 16 is a flowchart showing a flow of drain water (defrost water) treatment according to the present embodiment.
- a defrosting operation (defrosting process) is performed in Stirling cooler 1, and when the operation is completed, circulation pump 15 is turned on. Then, after the “predetermined time” has elapsed, the blower fan 10 is turned on.
- the waste heat of the worm head of the Stirling refrigerator 2 is transferred to the defrost water via the hot pipe 17, and the temperature of the defrost water is raised to the dew point temperature of the surrounding environment or higher. Can be. Then, after the defrost water is sufficiently warmed, an air flow can be generated by the blower fan 10 toward the defrost water. As a result, dew condensation of the humid air on the drain pan 9 is suppressed, and defrost water can be efficiently treated.
- FIG. 17 is a timing chart for the drain water treatment system according to the present embodiment.
- Stirling refrigerator 2 is turned off when the defrosting operation is started. Then, after the end of the defrosting operation, the Stirling refrigerator 2 is operated at a higher output (high output mode) than before the start of the defrosting operation (normal mode). Thereby, the temperature of the worm head of the Stirling refrigerator 2 becomes higher than the normal level.
- Circulation pump 15 is turned off when the defrosting operation is started. And after the end of the defrosting operation In other words, the circulation pump 15 is operated at a higher output (high output mode) than before the start of the defrosting operation (normal mode). As a result, the flow rate of the heat medium in the hot pipe 17 becomes higher than the normal level.
- the temperature of the warm head of the Stirling refrigerator 2 becomes higher than the normal level, and the flow rate of the heat medium in the hot pipe 17 becomes lower than the normal level. Also increase. As a result, the amount of heat transferred from the hot pipe 17 to the defrost water in the drain pan 9 increases as compared with the normal mode, and the evaporation of the defrost water is promoted.
- the blower fan 10 is turned off when the defrosting operation is started. After a lapse of a predetermined time (t) from the end of the defrosting operation, the blower fan 10 is operated at a higher output (high output mode) than before the start of the defrosting operation (normal mode). This exchanges air over drain 9 at a higher rate than normal. As a result, evaporation of the defrost water is promoted.
- the above-mentioned predetermined time (t) is a force that is appropriately changed in accordance with the specifications of the Stirling cooler 1.
- the desired predetermined time (t) is obtained by, for example, Equation 1.
- FIG. 18 is a diagram showing an experimental device for determining the relationship between the operation time of the blower fan and the amount of evaporation of drain water.
- a circulation circuit including a circulation pump 15, a refrigerant passage 16, a hot pipe 17, and a simulated heat source 18 is configured.
- the refrigerant heated by the simulated heat source 18 passes through the circulation pump 15 and the refrigerant passage 16 The heat is then returned to the simulated heat source 18 and heated again. This cycle warms the drain water in the drain pan 9.
- the inventors of the present application performed a drain water treatment experiment under the experimental conditions shown in Table 2 using the experimental device shown in FIG.
- the blowing by the blowing fan 10 and the heating of the drain water by the hot pipe 17 are started simultaneously.
- the relationship between the operating time of the blower fan and the amount of evaporation of drain water shown in Fig. 19 was obtained.
- the drain water treatment system included in the Stirling cooler 1 includes a drain pan 9 that stores drain water including defrost water, and a blower fan 10 that generates an airflow toward the drain water.
- the blower fan 10 is stopped, and control is performed to start the operation of the blower fan 10 after a predetermined time (t) has elapsed from the end of the defrosting operation.
- the drain water treatment system further includes a hot pipe 17 attached to the drain pan 9.
- the circulation pump 15 is operated after the start of the defrosting operation and before the operation of the blower fan 10 is restarted, and the drain water is heated by the hot pipe 17.
- the operation of the circulation pump 15 is stopped when the defrosting operation is started, and the operation of the circulation pump 15 is restarted when the defrosting operation is completed.
- the pump 15 may continue to operate during the defrosting operation, or the operation of the pump may be restarted before the defrosting operation is completed, after the circulation pump 15 is temporarily turned off at the start of the defrosting operation.
- the present invention is applied to a refrigerator and a Stirling refrigerator.
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- Removal Of Water From Condensation And Defrosting (AREA)
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JP2004-096445 | 2004-03-29 | ||
JP2004096445 | 2004-03-29 |
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WO2005093347A1 true WO2005093347A1 (ja) | 2005-10-06 |
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PCT/JP2005/005210 WO2005093347A1 (ja) | 2004-03-29 | 2005-03-23 | 冷却庫およびスターリング冷却庫ならびにドレン水処理システム |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007309616A (ja) * | 2006-05-22 | 2007-11-29 | Matsushita Electric Ind Co Ltd | 冷蔵庫 |
WO2008091234A1 (en) * | 2007-01-26 | 2008-07-31 | Erdogan Sinar | Condenser system eliminating condensed water of evaporator by means of evaporation without using additional energy |
JP2012242032A (ja) * | 2011-05-23 | 2012-12-10 | Panasonic Corp | 冷蔵庫 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1183285A (ja) * | 1997-09-01 | 1999-03-26 | Toshiba Corp | 冷蔵庫 |
JP2000292051A (ja) * | 1999-04-01 | 2000-10-20 | Sanden Corp | ショーケース |
JP2002031467A (ja) * | 2000-07-18 | 2002-01-31 | Sanyo Electric Co Ltd | 蒸発装置 |
JP2002295958A (ja) * | 2001-03-29 | 2002-10-09 | Sanyo Electric Co Ltd | 冷却装置のドレン水処理装置 |
JP2003172574A (ja) * | 2001-12-06 | 2003-06-20 | Nakano Refrigerators Co Ltd | 冷凍機内蔵型ショーケース |
JP2004020056A (ja) * | 2002-06-17 | 2004-01-22 | Sharp Corp | 冷却庫 |
-
2005
- 2005-03-23 WO PCT/JP2005/005210 patent/WO2005093347A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1183285A (ja) * | 1997-09-01 | 1999-03-26 | Toshiba Corp | 冷蔵庫 |
JP2000292051A (ja) * | 1999-04-01 | 2000-10-20 | Sanden Corp | ショーケース |
JP2002031467A (ja) * | 2000-07-18 | 2002-01-31 | Sanyo Electric Co Ltd | 蒸発装置 |
JP2002295958A (ja) * | 2001-03-29 | 2002-10-09 | Sanyo Electric Co Ltd | 冷却装置のドレン水処理装置 |
JP2003172574A (ja) * | 2001-12-06 | 2003-06-20 | Nakano Refrigerators Co Ltd | 冷凍機内蔵型ショーケース |
JP2004020056A (ja) * | 2002-06-17 | 2004-01-22 | Sharp Corp | 冷却庫 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007309616A (ja) * | 2006-05-22 | 2007-11-29 | Matsushita Electric Ind Co Ltd | 冷蔵庫 |
WO2008091234A1 (en) * | 2007-01-26 | 2008-07-31 | Erdogan Sinar | Condenser system eliminating condensed water of evaporator by means of evaporation without using additional energy |
JP2012242032A (ja) * | 2011-05-23 | 2012-12-10 | Panasonic Corp | 冷蔵庫 |
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