JP4956318B2 - Dew prevention device for cooling storage - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a dew prevention device for a front opening of a storage body of a cooling storage, and particularly to a dew prevention device applicable to a structure in which a refrigeration device is arranged to be drawn forward on the upper surface of a storage body. .

Place the condensation prevention pipe through which the high-temperature refrigerant of the refrigeration unit passes only in the front opening peripheral edge of the refrigerator body, as a heating means to heat the partition plate on the front of the partition wall that partitions the storage room, arrange the condensation part of the heat pipe, There has been disclosed a system in which the evaporation part of the heat pipe is heated by an electric heater, a compressor of a refrigeration apparatus, or a condenser of a refrigeration cycle. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 10-300319

  In the above-mentioned Patent Document 1, conventionally, a dew condensation prevention pipe through which the high-temperature refrigerant of the refrigeration apparatus passes is arranged so as to heat the partition plate on the front surface of the partition wall that partitions the storage chamber, thereby adopting a drawer structure for the refrigeration apparatus. In order to solve this problem, heat pipes are used only for the partition plate in front of the partition wall. This heat pipe is a system in which the working fluid evaporated in the evaporating part dissipates heat in the condensing part arranged corresponding to the partition plate and returns again to the evaporating part in a liquid state, which is described in paragraph numbers 0051 and 0055 of this publication. Thus, a compressor and a condenser are the forms accommodated in the machine room of the refrigerator lower part, and are the form of a household refrigerator from description of this invention.

  In general, the heat pipe of such a system adopts a wick and has a small heat transfer capability. Therefore, in Patent Document 1, the front opening peripheral edge of the refrigerator body is condensed by the high-temperature refrigerant of the refrigeration apparatus. The prevention pipe is used to prevent dew condensation, and the heat pipe is used to prevent condensation on the front surface of the partition wall in a small range.

  The present invention is not a heat pipe adopting a wick, but by adopting a heat pipe device of another configuration, by providing a configuration capable of preventing dew condensation at the front opening peripheral edge of the storage body of the cooling storage, In a large-sized cooling storage such as a commercial refrigerator or a commercial refrigerator-freezer that cannot be achieved by the above-mentioned Patent Document 1, a dew prevention device is provided that is suitable for preventing the peripheral edge of the front opening of the main body of the storage.

  In a cooling storage such as a commercial refrigerator or a commercial refrigerator, the refrigeration unit is placed in front of the top surface (ceiling) of the refrigerator body in consideration of maintenance and inspection of the refrigeration unit and ease of repair. A configuration that is placed so that it can be pulled out is adopted. For this reason, when adopting a heat pipe device to prevent dew condensation at the peripheral edge of the front opening of the storage body of the cooling storage, it is necessary to make the heat pipe device and the refrigeration device separable, and the present invention A dew prevention device suitable for that is also provided.

  The dew prevention device for a cooling storage of the first invention comprises a refrigeration device in which refrigerant compressed by a compressor passes through a condenser, a decompressor and an evaporator and returns to the compressor, and the storage by cold air cooled by the evaporator A heat storage device having a cooling storage for cooling the interior, a first heat radiating portion connected to the common heat absorbing portion through the first heat pipe, and a second heat radiating portion connected through the second heat pipe; and the first heat radiating portion. A first heating part for heating the second heating part and a second heating part for heating the second heat radiation part, wherein the heat absorption part is arranged to exchange heat with a high temperature part from the compressor to the decompressor, By switching heating between the first heating unit and the second heating unit, the supply of hydraulic fluid from the first heat radiating unit and the second heat radiating unit to the heat absorbing unit is switched, and the evaporated working fluid evaporated in the heat absorbing unit is ,Respectively The condensation at the time of returning to the first heat radiating part and the second heat radiating part through the first heat pipe and the second heat pipe is used to prevent dew condensation at the front of the cooling storage. .

  In the first invention, the dew prevention device for the cooling storage of the second invention is arranged such that the first heat pipe and the second heat pipe heat the front of the cooling storage, and the first heat radiation part and Each of the second heat dissipating parts is stored in the heat dissipating part sealed container by generating heat by the corresponding first heating part and the second heating part, respectively, with the hydraulic fluid stored in the heat dissipating part sealed container leaving an upper space. As the pressure rises, each of the heat sinks flows into the heat absorbing part through the corresponding first heat pipe and the second heat pipe, and the heat absorbing part is accumulated in the heat absorbing part sealed container leaving an upper space. The evaporating working fluid generated by heating the liquid by the high temperature portion moves from the upper space to the first heat pipe and the second heat pipe.

  According to a third aspect of the present invention, there is provided an anti-dew condensation apparatus for a cooling storage, comprising a refrigeration system in which refrigerant compressed by a compressor passes through a condenser, a decompressor and an evaporator and returns to the compressor, and is stored by cold air cooled by the evaporator. A heat storage device having a cooling storage for cooling the inside, a first heat radiating portion connected through a first heat pipe to a common heat absorbing portion, and a second heat radiating portion connected through a second heat pipe, wherein the heat absorbing portion is The first heat pipe and the second heat pipe are arranged so as to heat a front end of the cooling storage, and are arranged so as to exchange heat with a high-temperature portion from the compressor to the decompressor. Each of the first heat pipe and the second heat pipe is connected to the corresponding hydraulic fluid in the hydraulic fluid stored in the heat-dissipating part sealed container, leaving an upper space. The heat radiating unit sealed container includes a heating container communicated with a siphon tube and a pressure equalizing tube, and the heating container is heated by the corresponding first heating unit and second heating unit, respectively. As the pressure rises, the heat sink flows into the heat absorption part through the corresponding first heat pipe and the second heat pipe, and the heat absorption part is accumulated in the heat absorption part hermetic container while leaving an upper space. The evaporating working fluid generated by heating the working fluid by the high temperature portion moves from the upper space to the first heat pipe and the second heat pipe.

  According to a fourth aspect of the present invention, there is provided the dew prevention device for a cooling storage according to any one of the first to third aspects, wherein the cooling storage has the first heat pipe and the second heat pipe at the front opening of the storage main body. Are arranged on the upper and lower sides of the storage body so that the refrigeration device can be pulled out forward, and the first and second heat radiating portions of the heat pipe device are disposed at the lower part of the storage body. The heat absorption part keeps a thermal contact state with the high-temperature portion in a state where the refrigeration apparatus is installed at a normal position of the upper surface of the storage body, and is separated from the thermal contact state when the refrigeration apparatus is pulled forward. It is the structure.

  According to a fifth aspect of the present invention, in the fourth aspect of the invention, the thermal contact state is maintained by a heat conduction putty interposed between the heat absorbing portion and the high temperature portion.

  According to a sixth aspect of the present invention, there is provided the anti-dew condensation device for a cooling storehouse according to any one of the second to fifth inventions, wherein each of the first and second heat dissipating parts is a storage container for the cooling storehouse. It is arranged in the heat insulating material of the main body.

  According to a seventh aspect of the present invention, in the third invention, the dew prevention device for a cooling storehouse includes: a heat-radiating part sealed container and a heating container for each of the first heat-dissipating part and the second heat-dissipating part; It is arranged inside.

  According to an eighth aspect of the present invention, there is provided the dew prevention device for a cooling storehouse according to any one of the first to seventh aspects, wherein the first heating unit and the second heating unit are alternately switched and heated every predetermined time. Features.

  According to a ninth aspect of the present invention, there is provided the dew prevention device for a cold storage according to any one of the first to seventh aspects, wherein a temperature difference between the first heat radiating portion and the heat absorbing portion communicated with the first heat pipe is a predetermined temperature difference. When the temperature of the first heating unit is changed, the heating of the second heating unit is switched when a temperature difference between the second heat radiating unit communicating with the second heat pipe and the heat absorbing unit becomes a predetermined temperature difference. Thereby, the supply switching of the hydraulic fluid from the first heat radiating portion and the second heat radiating portion to the heat absorbing portion is performed.

  According to a tenth aspect of the present invention, in the third aspect, the dew prevention device for a cooling storehouse is characterized in that the heating by the first heating unit and the second heating unit is continuous heating.

  In the first invention, by alternately heating the first heating part and the second heating part, the working fluid is alternately supplied from the first heat radiating part and the second heat radiating part to the heat absorbing part, and the evaporated working fluid evaporated in the heat absorbing part is It is the structure which prevents dew condensation of the front-end | tip part of a cooling storage warehouse with the heat | fever of the condensation action performed by a 1st heat pipe and a 2nd heat pipe alternately. For this reason, when the first heat radiating part is heated by one heating part, for example, the first heating part, the working fluid of the first heat radiating part moves to the heat absorbing part in a liquid state, where the liquid working fluid is transferred to the refrigeration apparatus. The gaseous working fluid moves through the first heat pipe and the second heat pipe toward the first heat radiating section and the second heat radiating section having a low temperature. At this time, heat is dissipated and condensed in the first heat pipe part and the second heat pipe part, and the liquid working fluid enters the first heat dissipating part and the second heat dissipating part. Next, by switching from heating by the first heating unit to heating of the second heat radiating unit by the second heating unit, the working fluid of the second heat radiating unit moves to the heat absorbing unit in a liquid state by the same action, The liquid working fluid is heated and evaporated in the high temperature part of the refrigeration system, and heat is dissipated and condensed in the first heat pipe part and the second heat pipe part while moving to the low temperature first heat radiating part and second heat radiating part. Then, the liquid working fluid enters the first heat radiating portion and the second heat radiating portion. By repeating this operation, dew prevention of the front end of the cooling storage where the first heat pipe and the second heat pipe are arranged is performed, and a heat pipe device having a large heat transfer capability of the working fluid is obtained. It becomes suitable for prevention of dew on the front opening edge of the storage body of a large cooling storage such as a refrigerator or commercial refrigerator.

  In the second invention, in addition to the effects of the first invention, the first heat radiating part and the second heat radiating part each adopt a heat radiating part sealed container, and the heat absorbing part adopts a heat absorbing part sealed container, thereby stable operation. Is obtained.

  In the third invention, in addition to the effect of the first invention, the heat radiating section sealed container includes a heating container communicated with a siphon tube and a pressure equalizing pipe, and each of the heating containers is heated by a corresponding heating section. Even when the heating capacity of the heating unit (wattage in the case of an electric heater) is small as compared with the case where the container is heated by the heating unit, the liquid working fluid can be stably moved to the heat absorbing unit.

  In the fourth invention, in addition to the effects of any one of the first to third inventions, the refrigeration apparatus is suitable to be pulled forward, and is effective as a dew prevention apparatus for a commercial cooling storage.

  In the 5th invention, in addition to the effect of the 4th invention, since the heat contact state is maintained by the heat conduction putty between the heat absorption part and the high temperature part, even if the refrigeration apparatus is pulled out forward, An effective dew preventing effect can be obtained.

  In the sixth invention, in addition to the effects of any one of the second to fifth inventions, the respective heat radiating portion sealed containers of the first heat radiating portion and the second heat radiating portion are arranged in the heat insulating material of the storage body of the cooling storage. Therefore, compared with the case where it is arranged outside the storage body, the heat loss of the heating part is small, and in the case of an electric heater, the increase in wattage can be suppressed, the heating effect by the heating part is improved, and effective heating is achieved. Can be achieved.

  In the seventh invention, in addition to the effects of the third invention, the respective heat radiation part sealed container and the heating container of the first heat radiation part and the second heat radiation part are arranged in the heat insulating material of the storage body of the cooling storage, Compared with the case where it is arranged outside the storage body, the heat loss of the heating part is small, and in the case of an electric heater, the increase in wattage can be suppressed, the heating effect by the heating part is increased, and effective heating can be achieved.

  In the eighth invention, in addition to the effects of the first invention to the seventh invention, the first heating unit and the second heating unit are alternately switched every predetermined time (when the heating unit is an electric heater). The first electric heater and the second electric heater are alternately energized every predetermined time), the transfer of the working fluid to the absorption portion, the condensing action of the evaporated working fluid, and the movement of the working fluid to the other heat radiating portion Can be performed stably.

  In the ninth invention, in addition to the effects of any one of the first to seventh inventions, switching heating between the first heating unit and the second heating unit (when the heating unit is an electric heater, the first electric heater and the second heating unit) Since the electrical heater is switched to the current state), it can follow the heat load of the stored items stored in the cooling storage, the ambient temperature of the cooling storage, etc., and stable operation can be obtained. It becomes.

  In the tenth invention, the heat radiating unit sealed container includes a heating container communicated with a siphon tube and a pressure equalizing tube, and each heating container is heated by a corresponding heating unit. In contrast, even when the heating capacity of the heating unit (wattage in the case of an electric heater) is small, the liquid working fluid can be stably moved to the heat absorbing unit. Therefore, continuous heating of the heating unit (continuous energization in the case of an electric heater) eliminates the need for switching the operation of the heating unit (switching of energization in the case of an electric heater) and simplifies the control. it can.

  The dew prevention device for a cooling storage of the present invention comprises a refrigeration apparatus in which refrigerant compressed by a compressor passes through a condenser, a decompressor and an evaporator and returns to the compressor, and the inside of the storage is cooled by the cold air cooled by the evaporator A heat storage device having a cooling storage for cooling the first heat radiating portion connected to the common heat absorbing portion through the first heat pipe and a second heat radiating portion connected through the second heat pipe, and the first heat radiating portion. A first heating unit for heating and a second heating unit for heating the second heat radiation unit, wherein the first heating unit is a first electric heater, the second heating unit is a second electric heater, and Is arranged so as to exchange heat with a high-temperature portion from the compressor to the decompressor, and by switching heating between the first heating unit and the second heating unit, that is, the first electric heater and the second electric heater. Heater switching Thus, the supply switching of the working fluid from the first heat radiating part and the second heat radiating part to the heat absorbing part is performed, and the evaporated working fluid evaporated in the heat absorbing part becomes the first heat pipe and the second heat, respectively. It is the structure which performs dew prevention of the front-end | tip part of the said cooling storage by the condensation effect | action when returning to the said 1st thermal radiation part and the said 2nd thermal radiation part through a pipe, The Example of this invention is described below.

  Next, an embodiment of the present invention will be described. FIG. 1 is a front perspective view of a commercial cooling storage according to the present invention, FIG. 2 is a longitudinal side view of the commercial cooling storage according to the present invention, and FIG. 3 is an explanatory view of piping of a dew prevention device according to the present invention.

  Embodiments of the present invention will be described with reference to the drawings. The cooling storage 50 according to the present invention includes a storage body 51 having a front opening 51A and doors 52A and 52B for opening and closing the front opening 51A of the storage body 51, and a refrigeration apparatus 53 is drawn forward on the upper surface of the storage body 51. The cool air that is arranged and is cooled by the evaporator (cooler) 57 of the refrigeration apparatus 53 circulates in the storage 51 </ b> C of the storage body 51 by the blower 59.

  The refrigeration apparatus 53 constitutes a refrigeration cycle in which the refrigerant compressed by the compressor 54 passes back through the condenser 55, the decompressor 56 and the evaporator (cooler) 57 to the compressor 54, and these are the base plate 60. And installed in a machine room K provided on the upper surface of the storage body 51. A base plate 60 to which the refrigeration apparatus 53 is attached is placed on left and right rails 61 provided on the upper surface of the storage body 51, and is supported so that it can be drawn forward and stored in a rear normal position. The evaporator (cooler) 57 and the cool air circulation fan 59 are housed in a heat insulating box 62 made of a foam heat insulating material and placed on the base plate 60. In a state where the base plate 60 is pushed in and stored in the rear normal position, the base plate 60 is fixed to the normal position by a fixing device such as a screw. In this normal position, the cold air suction port 62A of the heat insulation box 62 communicates with the cold air suction port 51X formed on the upper wall of the storage body 51, and the cold air discharge port 62B of the heat insulation box 62 is formed on the upper wall of the storage body 51. It communicates with the discharge port 51Y. The cold air inlets 62A and 51X and the cold air outlets 62B and 51Y are configured to communicate with each other in a sealed state.

  The dew prevention device 1 of the cooling storage 50 includes a first heat pipe part 5A in which a common heat absorption part (evaporation part) 2 and a first heat radiation part 3A are connected by a first heat pipe 4A, and a common heat absorption part (evaporation). Part) 2 and the second heat radiating part 3B are connected to each other by a second heat pipe 4B. The second heat pipe part 5B includes a heat pipe device 5 arranged in parallel, and the heat absorbing part (evaporating part) 2 is compressed by the refrigeration apparatus 53. It arrange | positions so that it may heat-exchange with the high temperature part 53H from the machine 54 to the pressure reduction device 56. FIG. Moreover, 7 A of 1st heating parts which heat 3 A of 1st thermal radiation parts, and the 2nd heating part 7B which heats the 2nd thermal radiation part 3B are provided. In the embodiment, the first heating unit 7A is the first electric heater 7A, and the second heating unit 7B is the second electric heater 7B. Then, by switching heating between the first heating unit 7A and the second heating unit 7B, that is, by switching the energization between the first electric heater 7A and the second electric heater 7B, heat pipes from the first heat radiating unit 3A and the second heat radiating unit 3B. The working fluid (liquid working fluid) 8 enclosed in the apparatus 5 is alternately supplied to the heat absorbing portion (evaporating portion) 2, and the evaporated working fluid evaporated in the heat absorbing portion (evaporating portion) 2 is the first heat pipe 4 </ b> A and the first heat pipe 4 </ b> A. The peripheral edge 51B of the front opening 51A, which is the frontage of the storage body 51, is heated by the heat during the condensation action that is alternately performed by the two heat pipes 4B, and acts to prevent the peripheral edge 51B from being exposed to dew. .

  The heat absorption part (evaporation part) 2 is in a state where the refrigeration apparatus 53 is installed at a normal position on the upper surface of the storage body 51, that is, in a state where it is stored in a normal position on the left and right rails 61. It is the structure which leaves | separates from this heat contact state by keeping a contact state and drawing out the freezing apparatus 53 ahead. As this one structure, the heat absorption part (evaporation part) 2 is comprised by the heat absorption part airtight container 2A provided so that it may be in thermal contact with the high temperature part 53H, and is sent alternately from the 1st heat pipe 4A and the 2nd heat pipe 4B. The hydraulic fluid 8 is in a state where it accumulates leaving the upper space 2A1 in the sealed container 2A. And this airtight container 2A is installed in the upper surface part of the storage body 51 used as the back position of the freezing apparatus 53 of the state installed in the regular position of the upper surface part of the storage body 51, and high temperature part 53H is high temperature The sealed container 2A and the high-temperature part 53H are in thermal contact with each other through the portion 53H or the heat conduction putty 65 provided on the bottom surface of the sealed container 2A.

  4A of 1st heat pipes and the 2nd heat pipe 4B are in the heat insulating material of the storage main body 51 in the state which contact | abuts the back side of the front board of the peripheral part 51B in the front-end | tip part of the front opening 51A of the storage body 51, ie, the peripheral part 51B. Is arranged. The illustrated storage body 51 includes a left-right partition 51D at the upper and lower intermediate portions in order to open and close the front opening 51A with the upper and lower doors 52A and 52B. In order to prevent dew condensation on the front surface of the partition 51D, it may be heated by an electric heater disposed on the back side of the front plate of the partition 51D. However, in this embodiment, instead of this electric heater, on the back side of the front plate of the partition 51D. A configuration in which a part of the first heat pipe 4A and the second heat pipe 4B is arranged is adopted.

  The illustrated high-temperature portion 53H has a configuration in which a high-temperature refrigerant pipe extending from the condenser 55 to the decompressor 56 is formed in a meandering shape, and the hermetic container 2A is mounted thereon via a heat conduction putty 65. When 53 is installed at the normal position on the upper surface of the storage body 51 by pushing, the meandering high-temperature refrigerant pipe sinks to the lower side of the sealed container 2A, and at that time, the meandering high-temperature refrigerant pipe has its own By the elastic force, the high temperature portion 53H is pressed against the bottom surface of the sealed container 2A, whereby the thermal contact between the high temperature portion 53H and the sealed container 2A is kept good.

  The first heat radiating part 3 </ b> A and the second heat radiating part 3 </ b> B are arranged in the heat insulating material of the storage body 51. Specifically, each heat radiation part sealed container 6A, 6B is disposed in the heat insulating material on the bottom wall of the storage body 51 together with the first electric heater 7A and the second electric heater 7B.

  In the first heat radiating part 3A, the working fluid 8 is stored leaving the upper space 6A1 in the first heat radiating part sealed container 6A. The first heat pipe 4A penetrates deeply into the working liquid 8 and enters the sealed container 6A. The accommodated hydraulic fluid 8 is heated from the bottom by the first electric heater 7A, so that the hydraulic fluid 8 is liquid and passes through the first heat pipe 4A in accordance with the pressure increase in the sealed container 6A. This is a mechanism for moving to the evaporation unit 2.

  In the second heat radiating part 3B, the working liquid 8 is stored leaving the upper space 6B1 in the second heat radiating part sealed container 6B, and the second heat pipe 4B penetrates deeply into the working liquid 8 and the sealed container 6B. The hydraulic fluid 8 contained therein is heated from the bottom by the second electric heater 7B, so that the hydraulic fluid 8 is liquid and passes through the second heat pipe 4B as the pressure in the sealed container 6B rises. This is a mechanism for moving to the unit (evaporating unit) 2.

  In such a configuration, the supply state of the working fluid from the first heat radiating part 3A to the heat absorbing part 2 and the heat absorbing part 2 from the second heat radiating part 3B by the energization switching heating of the first electric heater 7A and the second electric heater 7B. Switching to the supply state of the hydraulic fluid is performed. When power is supplied to the cooling storage 50 and the engine is started, one of the first electric heater 7A and the second electric heater 7B is energized. For example, if the first electric heater 7A is energized, this energization causes the first electric heater 7A to generate heat, and the hydraulic fluid 8 passes through the first heat pipe 4A as the pressure in the sealed container 6A increases. The liquid is moved into the sealed container 2A of the upper heat absorption part (evaporation part) 2. The working fluid 8 moved and accumulated in the sealed container 2A generates an evaporating working fluid by heating by the high temperature portion 53H, and this evaporating working fluid is supplied from the upper space 2A1 to the first heat pipe portion 5A and the second heat pipe portion 5B. Move to.

  The evaporating working fluid that moves to the first heat pipe 4A and the second heat pipe 4B exchanges heat with the front end of the cold storage body 51, that is, the peripheral portion 51B of the front opening 51A, and heats the peripheral portion 51B. It flows into the lower sealed container 6A and the sealed container 6B while condensing into a liquid state by the condensing action. By heating the peripheral edge portion 51B, dew on the portion is prevented.

  Next, control is performed so as to switch from the operation by energization of the first electric heater 7A to the operation by energization of the second electric heater 7B. By energizing the second electric heater 7B, the second electric heater 7B generates heat, and as the pressure in the sealed container 6B rises, the hydraulic fluid 8 is in a liquid state through the second heat pipe 4B, and an upper heat absorbing portion ( Move to (evaporating section) 2. The working fluid 8 moved and accumulated in the sealed container 2A generates an evaporating working fluid by heating by the high temperature portion 53H, and this evaporating working fluid is supplied from the upper space 2A1 to the first heat pipe portion 5A and the second heat pipe portion 5B. Move to.

  The evaporating working fluid that moves to the first heat pipe 4A and the second heat pipe 4B exchanges heat with the front end of the cold storage body 51, that is, the peripheral portion 51B of the front opening 51A, and heats the peripheral portion 51B. It flows into the lower sealed container 6A and the sealed container 6B while condensing into a liquid state by the condensing action. By heating the peripheral edge portion 51B, dew on the portion is prevented.

  Thus, the hydraulic fluid sealed in the heat pipe device 5 from the sealed container 6A of the first heat radiating part 3A and the sealed container 6B of the second heat radiating part 3B by alternately heating the first heat radiating part 3A and the second heat radiating part 3B. (Liquid working fluid) 8 is alternately supplied to the endothermic part (evaporating part) 2, and the evaporating working fluid evaporated in the endothermic part (evaporating part) 2 alternates between the first heat pipe 4 </ b> A and the second heat pipe 4 </ b> B. The peripheral portion 51B of the front opening 51A, which is the front portion of the storage body 51, is heated by the heat generated during the condensing action so that the peripheral portion 51B is prevented from being exposed to dew.

  As described above, when the working fluid (liquid working fluid) 8 is moved by switching the energization between the first electric heater 7A and the second electric heater 7B, as one embodiment, the cooling storage 50 is supplied with power and started. In this case, it is assumed that substantially the same amount (for example, 30 ml) of the working fluid (liquid working fluid) 8 is accommodated in the sealed container 6A and the sealed container 6B. In this state, by energizing the first electric heater 7A as described above, most of the working fluid (liquid working fluid) 8 in the sealed container 6A (for example, 26 ml) is sealed in the heat absorbing part (evaporating part) 2. Move into 2A. Here, the energization of the first electric heater 7A is turned off, and the working fluid (liquid working fluid) 8 in the sealed container 2A evaporates by heating by the high temperature portion 53H to become an evaporating working fluid, which becomes the first heat pipe portion 5A. And the second heat pipe portion 5B condenses, a part (for example, 13 ml) moves to the sealed container 6B, and the rest (for example, 13 ml) moves to the sealed container 6A.

  Next, the operation is switched to the operation by energization of the second electric heater 7B. By energizing the second electric heater 7B, most of the working fluid (liquid working fluid) 8 in the sealed container 6B moves into the sealed container 2A of the heat absorbing part (evaporating part) 2, and similarly to the above, The working fluid (liquid working fluid) 8 is evaporated by heating by the high temperature portion 53H to become an evaporating working fluid, which is condensed in the first heat pipe portion 5A and the second heat pipe portion 5B, and a part (for example, 13 ml) is formed. It moves to the sealed container 6A, and the rest (for example, 13 ml) moves to the sealed container 6B. In such an operation, the moving amount of the working fluid (liquid working fluid) 8 is slightly increased or decreased depending on the temperature relationship between the first heat pipe portion 5A and the second heat pipe portion 5B.

  Thus, the supply switching of the working fluid from the first heat radiating part 3A and the second heat radiating part 3B to the heat absorbing part 2 is performed by the energization switching heating of the first electric heater 7A and the second electric heater 7B. The peripheral portion 51B of the front opening 51A, which is the front portion of the storage body 51, is heated by the heat during the condensing action of the evaporated working fluid performed in the heat pipe 4A and the second heat pipe 4B, and the peripheral portion 51B is exposed to dew. Prevention will be performed.

  The energization switching of the first electric heater 7A and the second electric heater 7B may be configured to be alternately energized every predetermined time, but the heat of the high temperature portion 53H and the heat absorbing portion (evaporating portion) 2 Since the exchange state changes depending on the thermal load of the stored items stored in the cooling storage 50, the ambient temperature of the cooling storage 50, and the like, it is preferable to be able to follow this. As one of the means, when the temperature of the first heat radiating portion 3A communicating with the first heat pipe 4A and the temperature of the heat absorbing portion 2 become a predetermined temperature difference, the energization of the first electric heater 7A is switched, and the second heat pipe When the temperature of the second heat dissipating part 3B communicating with 4B and the heat absorbing part 2 reaches a predetermined temperature difference, the energization of the second electric heater 7B is switched, so that the heat absorbing part is transferred from the first heat dissipating part 3A and the second heat dissipating part 3B. The supply of hydraulic fluid to 2 is switched.

  One specific control method will be described. A temperature detection unit S1 for detecting the temperature of the metal sealed container 6A of the first heat radiating unit 3A, a temperature detection unit S2 for detecting the temperature of the metal sealed container 6B of the second heat radiating unit 3B, and a metal of the heat absorbing unit 2 A temperature detection unit S3 for detecting the temperature of the sealed container 2A is provided, and this detection data is input to a control unit (not shown). When the power is supplied to the cooling storage 50 and started, the operation is started when the second electric heater 7B is not energized (OFF) and the first electric heater 7A is energized (ON) as described above. To do. Further, at the time of starting, the difference between the temperature T1 detected by the temperature detector S1 and the temperature T3 detected by the temperature detector S3 does not exceed a predetermined value, and the temperature T2 detected by the temperature detector S2 The difference from the temperature T3 detected by the temperature detector S3 is also not greater than a predetermined value.

  At this start-up, the first mode in which the working fluid (liquid working fluid) 8 in the sealed container 6A is moved into the sealed container 2A of the heat absorbing part (evaporating part) 2 by energization (ON) of the first electric heater 7A is started. . If the difference between the temperature T1 detected by the temperature detector S1 and the temperature T3 detected by the temperature detector S3 is equal to or greater than a predetermined value, the controller turns off the first electric heater 7A. Since the working fluid (liquid working fluid) 8 is stored in the hermetic container 2A due to the movement of the working fluid (liquid working fluid) 8 while the first electric heater 7A is energized (ON), the temperature detecting unit is still present. The difference between the temperature T2 detected by S2 and the temperature T3 detected by the temperature detector S3 is not greater than or equal to a predetermined value. The evaporating working fluid obtained by evaporating the working fluid (liquid working fluid) 8 in the sealed container 2A by heating by the high temperature portion 53H moves to the sealed container 6A and the sealed container 6B as described above. When the working fluid (liquid working fluid) 8 evaporates by heating by the high temperature portion 53H, the temperature of the sealed vessel 2A rises when the working fluid (liquid working fluid) 8 in the sealed vessel 2A becomes insufficient. When the difference between the detection temperature T2 of the temperature detection unit S2 and the detection temperature T3 of the temperature detection unit S3 is equal to or greater than a predetermined value, the control unit supplies the second electric heater 7B that has been de-energized (OFF) ( ON) and the second electric heater 7B is energized (ON) to shift to the second mode in which the working fluid (liquid working fluid) 8 in the sealed container 6B is moved into the sealed container 2A of the heat absorbing part (evaporating part) 2. . Even if the temperature rise of the airtight container 2A in this case causes the difference between the temperature T1 detected by the temperature detector S1 and the temperature T3 detected by the temperature detector S3 to be equal to or greater than a predetermined value, the control unit 1 The electric heater 7A is configured not to be switched to energization (ON).

  By energization (ON) of the second electric heater 7B by the transition to the second mode, the working fluid (liquid working fluid) 8 in the sealed container 6B is moved into the sealed container 2A of the heat absorbing part (evaporating part) 2. If the difference between the temperature T2 detected by the temperature detector S2 and the temperature T1 detected by the temperature detector S1 is equal to or greater than a predetermined value, the controller turns off the second electric heater 7B (OFF). Since the working fluid (liquid working fluid) 8 is stored in the hermetic container 2A due to the movement of the working fluid (liquid working fluid) 8 while the second electric heater 7B is energized (ON), the temperature detecting unit is still present. The difference between the temperature T1 detected by S1 and the temperature T3 detected by the temperature detector S3 is not greater than or equal to a predetermined value. Then, the evaporation working fluid generated by heating the high-temperature portion 53H of the working fluid (liquid working fluid) 8 in the sealed container 2A moves to the sealed container 6A and the sealed container 6B. As described above, when the hydraulic fluid (liquid working fluid) 8 in the sealed container 2A evaporates due to heating by the high temperature portion 53H, the hydraulic fluid (liquid working fluid) 8 in the sealed container 2A becomes insufficient. The temperature of the container 2A rises. When the difference between the detected temperature T1 of the temperature detecting unit S1 and the detected temperature T3 of the temperature detecting unit S3 is equal to or greater than a predetermined value, the control unit supplies (ON) the first electric heater 7A that has been de-energized (OFF). ), And similarly to the above, the first mode in which the working fluid (liquid working fluid) 8 of the sealed container 6A is moved into the sealed container 2A of the heat absorbing part (evaporating part) 2 by energization (ON) of the first electric heater 7A. Migrate to Even if the temperature rise of the airtight container 2A in this case causes the difference between the temperature T2 detected by the temperature detector S2 and the temperature T3 detected by the temperature detector S3 to be equal to or greater than a predetermined value, the controller 2 The operation to switch the electric heater 7B to energization (ON) is not performed.

  In this way, by switching the energization (ON) and the non-energization (OFF) of the first electric heater 7A and the second electric heater 7B, the first heat radiating portion 3A and the second heat radiating portion 3B are moved to the heat absorbing portion. Since the supply of hydraulic fluid to 2 is switched, the heat at the time of the condensation action of the evaporated working fluid performed in the first heat pipe 4A and the second heat pipe 4B causes the front opening 51A that is the front portion of the storage body 51 to The peripheral portion 51B is heated to prevent the peripheral portion 51B from being exposed to dew.

  FIG. 4 is an explanatory view of piping showing another embodiment of the dew prevention device according to the present invention. The same parts as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the description thereof is the same as that of the first embodiment. Here, a different part from Example 1 is a structure of the thermal radiation part of the heat pipe apparatus 5. FIG. That is, the first heat radiating portion 3A includes a sealed container 6A and a liquid return heating sealed container 6C, and the sealed container 6A and the liquid return heating sealed container 6C communicate with each other through the pressure equalizing tube 10A and the siphon tube 9A. The container 6C is heated by the first electric heater 7A. The second heat dissipating unit 3B includes a sealed container 6B and a liquid return heating sealed container 6D. The sealed container 6B and the liquid return heating sealed container 6D communicate with each other through a pressure equalizing tube 10B and a siphon tube 9B, and the liquid return heating sealed. The container 6D is heated by the second electric heater 7B. In this case, the supply switching control of the hydraulic fluid from the first heat radiating part 3A and the second heat radiating part 3B to the heat absorbing part 2 by the energization switching heating of the first electric heater 7A and the second electric heater 7B is the same as described above. .

  In this configuration, in the first heat dissipating part 3A, when the level of the working fluid (liquid working fluid) 8 in the sealed container 6A becomes equal to or higher than the inlet level of the siphon tube 9A, the working fluid (liquid working fluid) 8 in the sealed container 6A Since the working fluid (liquid working fluid) 8 flows into the liquid return heating sealed container 6C through the siphon tube 9A, the increased pressure in the liquid return heating sealed container 6C is heated by the first electric heater 7A. Then, the pressure in the space 6A1 in the sealed container 6A is increased through the pressure equalizing pipe 10A, the working fluid (liquid working fluid) 8 in the sealed container 6A is pushed out to the first heat pipe 4A, and the upper heat absorbing section (evaporating section). 2 is moved into the closed container 2A.

  In this case, since the liquid return heating sealed container 6C having a smaller internal capacity than the sealed container 6A is heated by the first electric heater 7A, such an effect can be obtained. Therefore, the wattage of the first electric heater 7A ( Even if the capacity is small, a sufficient operation can be obtained, and a power saving effect can be obtained as compared with the first embodiment. In order to stabilize the operation, the first electric heater 7A can be continuously energized.

  The same applies to the second heat radiating portion 3B. When the level of the working fluid (liquid working fluid) 8 in the sealed container 6B becomes equal to or higher than the inlet level of the siphon tube 9B, the working fluid (liquid working fluid) 8 in the sealed container 6B operates. Since the liquid (liquid working fluid) 8 flows into the liquid return heating sealed container 6D through the siphon tube 9B, the heated pressure in the liquid return heating sealed container 6D is increased by being heated by the second electric heater 7B. The pressure in the space 6B1 in the sealed container 6B is increased through the pressure equalizing pipe 10B, the working fluid (liquid working fluid) 8 in the sealed container 6B is pushed out to the second heat pipe 4B, and the upper heat absorbing part (evaporating part) 2 To the closed container 2A.

  In this case, since the liquid return heating sealed container 6D having a smaller internal capacity than the sealed container 6B is heated by the second electric heater 7B, such an effect can be obtained. Therefore, the wattage of the second electric heater 7B ( Even if the capacity is small, a sufficient operation can be obtained, and a power saving effect can be obtained as compared with the first embodiment. In order to stabilize the operation, the second electric heater 7B can be in a continuously energized state, so that there is no need to switch the electric heater, and the control can be simplified.

  As for this invention, the form of the cooling storage is not limited to the said embodiment, Moreover, the high temperature part 53H of the freezing apparatus 53 which the heat absorption part (evaporation part) 2 heat-exchanges reaches from the compressor 54 to the decompressor 56. The high temperature portion 53 </ b> H may be the compressor 54 or the condenser 55, or may be a high temperature refrigerant pipe portion from the compressor 54 to the decompressor 56. Therefore, various modifications can be considered without departing from the technical scope of the present invention, and various embodiments according to the modifications are included.

It is a front perspective view of the business-use cooling storage according to the present invention. Example 1 It is a vertical side view of the commercial cooling storage according to the present invention. Example 1 It is piping explanatory drawing of the dew prevention apparatus which concerns on this invention. Example 1 It is piping explanatory drawing which shows the other Example of the dew prevention apparatus which concerns on this invention. (Example 2)

Explanation of symbols

1 ... Dew prevention device 2 ... Heat absorption part (evaporation part)
3A ... 1st heat radiation part 3B ... 2nd heat radiation part 4A ... 1st heat pipe 4B ... 2nd heat pipe 5 ... Heat pipe apparatus 5A ... 1st heat pipe part 5B ... 2nd heat pipe part 6A ... Airtight container 6B ... Airtight container 6C ... Liquid return heating airtight container 6D ... Liquid return heating airtight container 7A ... First electric heater 7B ... Second electric heater 8 ... working fluid (liquid working fluid)
9A: Siphon tube 9B: Siphon tube 10A ... Pressure equalizing tube 10B ... Pressure equalizing tube 50 ... Cooling storage 51 ... Storage body 51A ... Front opening 51B ... Peripheral part 51C ... Inside storage 52A・ ・ Door 52B ・ ・ Door 53 ・ ・ ・ Refrigeration equipment 53H ・ ・ High temperature part 54 ・ ・ ・ Compressor 55 ・ ・ ・ Condenser 56 ・ ・ ・ Decompressor 57 ・ ・ ・ Evaporator (cooler)
58 ... Blower 59 ... Blower 60 ... Base plate 61 ... Rail 62 ... Heat insulation box 65 ... Heat conduction putty S1, S2, S3 ... Temperature detector

Claims (10)

  The refrigerant compressed by the compressor constitutes a refrigeration device that returns to the compressor through a condenser, a decompressor and an evaporator, and cools the inside of the storage by the cold air cooled by the evaporator, and a common heat absorption part On the other hand, a heat pipe device having a first heat radiating part connected through the first heat pipe and a second heat radiating part connected through the second heat pipe, a first heating part for heating the first heat radiating part, and the second heat radiating part A second heating unit that heats the heat sink, and the heat absorption unit is arranged to exchange heat with a high-temperature part from the compressor to the decompressor, and switching heating between the first heating unit and the second heating unit is performed. The supply of hydraulic fluid from the first heat radiating section and the second heat radiating section to the heat absorbing section is switched by the above, and the evaporating working fluid evaporated in the heat absorbing section is converted into the first heat pipe and the second heat pipe, respectively. Wherein through the condensation action when the first heat radiating unit returns the to the second heat radiating unit, the cooling storage dew condensation preventive device cooling storage and performs dew condensation preventive of frontage of.   The first heat pipe and the second heat pipe are disposed so as to heat an opening of the cooling storage, and the first heat radiating part and the second heat radiating part respectively leave an upper space in the heat radiating part sealed container. The first heat pipe and the second heat respectively corresponding to the pressure increase in the heat-radiating part sealed container caused by the heating by the corresponding first heating part and the second heating part. The heat-absorbing part flows into the heat-absorbing part through a pipe, and the heat-absorbing part heats the working fluid accumulated in the heat-absorbing-part sealed container while leaving the upper space by the high-temperature part, and evaporating working fluid is generated from the upper space. The dew prevention device for a cooling storage according to claim 1, wherein the apparatus is configured to move to the first heat pipe and the second heat pipe.   The refrigerant compressed by the compressor constitutes a refrigeration device that returns to the compressor through a condenser, a decompressor and an evaporator, and cools the inside of the storage by the cold air cooled by the evaporator, and a common heat absorption part A heat pipe device having a first heat dissipating part connected through a first heat pipe and a second heat dissipating part connected through a second heat pipe, and a high temperature part from the compressor to the pressure reducer The first heat pipe and the second heat pipe are arranged so as to heat the front of the cooling storage, and the first heat radiating part and the second heat radiating part are respectively radiated heat. The corresponding first heat pipe and the second heat pipe communicate with the hydraulic fluid stored in an upper sealed container leaving an upper space, and these heat radiating section sealed containers are siphon tubes. A heating vessel communicated with a pressure equalizing pipe is provided, and the heating vessel is heated by the corresponding first heating unit and the second heating unit, respectively, and the corresponding first of each is accompanied by a rise in pressure in the heat radiating unit sealed vessel. The heat absorption part flows into the heat absorption part through one heat pipe and the second heat pipe, and the heat absorption part is generated by heating the hydraulic fluid accumulated in the heat absorption part sealed container while leaving the upper space by the high temperature part. An apparatus for preventing dew condensation of a cooling storage, characterized in that the evaporating working fluid moves from an upper space to the first heat pipe and the second heat pipe.   In the cooling storage, the first heat pipe and the second heat pipe are arranged on the left and right of the front opening of the storage main body, and the refrigeration apparatus is arranged on the upper surface of the storage main body so that it can be pulled out forward. The first heat radiating part and the second heat radiating part of the heat pipe device are arranged in a lower part of the storage body, and the heat absorption part is in a state where the refrigeration apparatus is installed at a normal position of the upper surface part of the storage body. The dew prevention of the cooling storage according to any one of claims 1 to 3, wherein the cooling storage is kept in thermal contact with the high temperature portion and is separated from the thermal contact state when the refrigeration apparatus is pulled forward. apparatus.   The dew prevention device for a cooling storage according to claim 4, wherein the thermal contact state is maintained by a heat conduction putty interposed between the heat absorbing part and the high temperature part.   6. The heat radiating unit sealed container of each of the first heat radiating unit and the second heat radiating unit is disposed in a heat insulating material of a storage body of the cooling storage unit, according to claim 2. Dew prevention device for cooling storage.   The cooling storage according to claim 3, wherein each of the first heat radiating part and the second heat radiating part is disposed in a heat insulating material of a storage body of the cooling storage. Dew prevention device.   The dew prevention device for a cooling storage according to any one of claims 1 to 7, wherein the first heating unit and the second heating unit are alternately switched and heated at predetermined time intervals.   When the temperature of the first heat dissipating part communicating with the first heat pipe and the heat absorbing part reach a predetermined temperature difference, the heating of the first heating part is switched, and the second heat dissipating communicated with the second heat pipe. The supply of hydraulic fluid from the first heat radiating part and the second heat radiating part to the heat absorbing part by switching the heating of the second heating part when the temperature of the part and the heat absorbing part reaches a predetermined temperature difference The dew prevention device for a cooling storage according to any one of claims 1 to 7, wherein:   The dew prevention device for a cooling storage according to claim 3, wherein the heating by the first heating unit and the second heating unit is continuous heating.

Images