There is provided a dewfall preventing device of a refrigerator for preventing dew from forming on the contact portion of a refrigerator case and a door, the device comprising a heat exchanger for concentrating the waste heat generated from a compressor with contacted to the compressor of the refrig
There is provided a dewfall preventing device of a refrigerator for preventing dew from forming on the contact portion of a refrigerator case and a door, the device comprising a heat exchanger for concentrating the waste heat generated from a compressor with contacted to the compressor of the refrigerator and a thermosyphon, its two ends connected to the heat exchanger, and having a working fluid phase-transferred into a gas phase after heat-exchanging with the waste heat from the compressor, move along the hot line, vaporize the dew forming on the contact portion of a refrigerator case and a door by the radiation of the heat, transferred into a liquid phase, fallen down by gravitation, and introduced back into the heat exchanger.
대표청구항▼
There is provided a dewfall preventing device of a refrigerator for preventing dew from forming on the contact portion of a refrigerator case and a door, the device comprising a heat exchanger for concentrating the waste heat generated from a compressor with contacted to the compressor of the refrig
There is provided a dewfall preventing device of a refrigerator for preventing dew from forming on the contact portion of a refrigerator case and a door, the device comprising a heat exchanger for concentrating the waste heat generated from a compressor with contacted to the compressor of the refrigerator and a thermosyphon, its two ends connected to the heat exchanger, and having a working fluid phase-transferred into a gas phase after heat-exchanging with the waste heat from the compressor, move along the hot line, vaporize the dew forming on the contact portion of a refrigerator case and a door by the radiation of the heat, transferred into a liquid phase, fallen down by gravitation, and introduced back into the heat exchanger. for forcing the chilled water through the second chiller at a second flow rate that may vary, a bypass valve, a first heat exchanger, and a second heat exchanger, wherein the chilled water circuit connects the first chiller, the second chiller, the bypass valve, the first heat exchanger, and the second heat exchanger in parallel flow relationship with respect to the flow of chilled water, the method comprising: increasing the demand for chilled water; in response to increasing the demand for chilled water, changing the operation of the first chiller from operating at the first full load to operating within the first range of partial loads; in response to increasing the demand for chilled water, reducing the first rate at which the first pump forces chilled water through the first chiller; and in response to increasing the demand for chilled water, energizing the second chiller to begin operating the second chiller in the second range of partial loads. 5. The method of claim 4, further comprising: via a supply line of the chilled water circuit, conveying the chilled water to the first heat exchanger and the second heat exchanger; via a return line of the chilled water circuit, conveying the chilled water from the first heat exchanger and the second heat exchanger; sensing a water pressure differential between the supply line and the return line; and varying the first flow rate and the second flow rate in response to sensing the water pressure differential. 6. The method of claim 5, further comprising: with respect to chilled water flowing through the supply line, installing the second heat exchanger further downstream than the first heat exchanger; and sensing the water pressure differential at a location that is closer to the second heat exchanger than the first heat exchanger. 7. The method of claim 4, further comprising: determining whether at least one of the first flow rate and the second flow rate decreases to a predetermined minimum flow rate; and opening the bypass valve in response to at least one of the first flow rate and the second flow rate decreasing to the predetermined minimum flow rate. 8. The method of claim 7, further comprising sensing a water pressure drop across at least one of the first chiller and the second chiller to determine whether the first flow rate and the second flow rate has decreased to the predetermined minimum flow rate. 9. The method of claim 4, further comprising: via a supply line of the chilled water circuit, conveying the chilled water to the first heat exchanger and the second heat exchanger; and determining the demand for chilled water by sensing a temperature of the chilled water in the supply line. 10. The method of claim 4, further comprising: operating the first chiller at a first partial load; operating the second chiller at a second partial load; and deactivating the second chiller when the sum of the first partial load plus the second partial load is less than the first full load. 11. The method of claim 4, further comprising: at times, running the first pump and the second pump at varying speed and in unison, whereby the speed of the first pump and the speed of the second pump are substantially equal. 12. A method of controlling a chiller system that includes a first chiller and a second chiller for meeting a demand for chilled water, wherein the first chiller is selectively operable at a first full load and a first range of partial loads, and the second chiller is selectively operable at a second full load and a second range of partial loads, wherein the chiller system further includes a chilled water circuit, a first pump for forcing the chilled water through the first chiller at a first flow rate that may vary, a second pump for forcing the chilled water through the second chiller at a second flow rate that may vary, a bypass valve, a first heat exchanger, and a second heat exchanger, wherein the chilled water circuit connects the fi rst chiller, the second chiller, the bypass valve, the first heat exchanger, and the second heat exchanger in parallel flow relationship with respect to the flow of chilled water, the method comprising: establishing a chilled water temperature target; establishing a chilled water pressure target; selectively operating the chiller system in a high demand mode and a low demand mode to meet the chilled water temperature target; in the low demand mode, leaving the second chiller inactive while selectively operating the first chiller in the full load and the first range of partial loads to meet the chilled water temperature target; in the low demand mode, leaving the second pump inactive while modulating the pressure of the chilled water by controlling the operation of the first pump to meet the chilled water pressure target; in the high demand mode, operating the first chiller at a first partial load while operating the second chiller at a second partial load; and in the high demand mode, modulating the pressure of the chilled water by controlling the operation of the first pump and the second pump to meet the chilled water pressure target. 13. The method of claim 12, further comprising: via a supply line of the chilled water circuit, conveying the chilled water to the first heat exchanger and the second heat exchanger; via a return line of the chilled water circuit, conveying the chilled water from the first heat exchanger and the second heat exchanger; sensing a water pressure differential between the supply line and the return line, wherein the chilled water pressure target is a predetermined value of the water pressure differential. 14. The method of claim 13, further comprising: with respect to chilled water flowing through the supply line, installing the second heat exchanger further downstream than the first heat exchanger; and sensing the water pressure differential at a location that is closer to the second heat exchanger than the first heat exchanger. 15. The method of claim 12, further comprising: determining whether at least one of the first flow rate and the second flow rate decreases to a predetermined minimum flow rate; and opening the bypass valve in response to at least one of the first flow rate and the second flow rate decreasing to the predetermined minimum flow rate. 16. The method of claim 15, further comprising sensing a water pressure drop across at least one of the first chiller and the second chiller to determine whether the first flow rate and the second flow rate has decreased to the predetermined minimum flow rate. 17. The method of claim 12, further comprising: via a supply line of the chilled water circuit, conveying the chilled water to the first heat exchanger and the second heat exchanger; and determining the demand for chilled water by sensing a temperature of the chilled water in the supply line. 18. The method of claim 12, further comprising: operating the first chiller at a first partial load; operating the second chiller at a second partial load; and deactivating the second chiller when the sum of the first partial load plus the second partial load is less than the first full load. 19. The method of claim 12, further comprising: at times, running the first pump and the second pump at varying speed and in unison, whereby the speed of the first pump and the speed of the second pump are substantially equal. 20. A method of controlling a chiller system that includes a first chiller and a second chiller for meeting a demand for chilled water, wherein the first chiller is selectively operable at a first full load and a percent of the first full load ranging from zero to one hundred percent, and the second chiller is selectively operable at a second full load and a percent of the second full load ranging from zero to one hundred percent, wherein the chiller system further includes a chilled water circuit, a first pump for forcing the chilled water through t
Skvarenina John A. (2639 W. Augusta Chicago IL 60622), Method and apparatus for preventing condensation from forming about the periphery of a freezer door.
Williams Stephen G. (Ohio Township ; Warrick County IN) Greenwood Michael W. (Ohio Township ; Warrick County IN), Refrigerator mullion assembly with hot gas defrost tube.
Park, Jong Han; Park, Young Min; Lee, Chang Seon; Choi, Sung Oh; Kim, Sung Chun; Chang, Seung Yong; Yoon, Seok Ho; Chung, Baik Young, Multi-type air conditioner with defrosting device.
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