JP2016090135A - Cooling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device capable of performing continuously a high load cooling without increasing a capacity of an evaporator.SOLUTION: A cooling apparatus comprises: a plurality of evaporators for gasifying a liquid-like actuation medium connected to each other in a height direction through a first connecting pipe, within a display shelf casing; a reactor connected to an evaporator positioned at the upper-most stage of the plurality of evaporators through a second connection pipe and a first valve for storing a gas-solid reaction heat accumulation material reacted with the gasified gaseous actuation medium; and a liquid supply pipe connected to the evaporator positioned at the upper-most stage of the plurality of evaporators or the second connecting pipe so as to supply the liquid-like actuation medium to the plurality of evaporators. The liquid-like actuation medium is supplied in sequence from the evaporator positioned at the upper-most stage of the plurality of evaporators to the evaporator positioned at the lower-most stage through the first connecting pipe.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cooling device.

  Conventionally, a reactor in which a gas-solid reaction heat storage material is accommodated and an evaporator to which a liquid working medium that generates a gaseous working medium that reacts with the gas-solid reaction heat storage material is supplied via a valve. Is known (see, for example, Patent Document 1).

  In such a cooling apparatus, a liquid working medium is vaporized by an evaporator, and the vaporized working medium is adsorbed to a gas-solid reaction heat storage material to cool the evaporator with heat of vaporization, and is provided in a cold box. The air in the cool box is cooled by the blower.

  However, in the technique described in Patent Document 1, when the cooling load of a commercial refrigerated showcase or the like is large, the object to be cooled is cooled through the cooling air, resulting in a loss of cooling energy. Moreover, in order to suppress the depletion of the liquid working medium supplied to the evaporator, it is necessary to increase the capacity of the evaporator.

  Therefore, an object of the present invention is to provide a cooling device that can continuously perform cooling with a large load without increasing the capacity of the evaporator.

  In one proposal, a plurality of evaporators for vaporizing a liquid working medium connected to each other via a first connecting pipe in the height direction inside the display shelf housing, and among the plurality of evaporators, A reactor that is connected to the evaporator located in the uppermost stage via a second connecting pipe and a first valve, and that contains a gas-solid reaction heat storage material that reacts with the vaporized gaseous working medium; An evaporator located at the uppermost stage among a plurality of evaporators, or a liquid supply pipe connected to the second connecting pipe and supplying a liquid working medium to the plurality of evaporators, A cooling device is provided in which the working medium is sequentially supplied from the evaporator located at the uppermost stage to the evaporator located at the lowermost stage among the plurality of evaporators via the first connection pipe.

  According to one aspect, it is possible to provide a cooling device capable of continuously performing cooling with a large load without increasing the capacity of the evaporator.

The schematic block diagram of the cooling device which concerns on 1st Embodiment of this invention. The figure which expanded the connection part vicinity of the evaporator and connection pipe in a cooling device. The figure which expanded the part of the evaporator in a cooling device. The schematic block diagram of the cooling device which concerns on 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, the duplicate description is abbreviate | omitted by attaching | subjecting the same code | symbol.

(First embodiment)
The configuration of the cooling device according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2, taking as an example a case where it is applied to an open showcase-type refrigerated showcase. FIG. 1 is a schematic configuration diagram of a cooling device according to the first embodiment of the present invention.

  The cooling device according to the first embodiment of the present invention includes an upper display shelf portion 110, a lower display shelf portion 120, a working medium storage container 130, a reactor 140, a working medium liquid receiving container 150, A connection pipe 160, a second connection pipe 170, and a control device 190 are included.

  The upper display shelf portion 110 is attached to the inside of the opening of the display shelf housing 101 having a substantially U-shaped cross section at the front opening. More specifically, a plurality of shelf installation units 102 are provided inside the opening of the display shelf housing 101, and the position of the shelf installation unit 102 to which the upper display shelf unit 110 is attached can be arbitrarily selected. The mounting position of the upper display shelf 110 can be adjusted. The upper display shelf section 110 includes a display shelf top plate 111 on which an object to be cooled is displayed, and an evaporator 112 provided so as to be in contact with the lower surface of the display shelf top plate 111.

  The display shelf top plate 111 is a plate on which objects to be cooled are displayed. The material constituting the display shelf top plate 111 is not particularly limited as long as it can be kept in vacuum and has corrosion resistance, but from the viewpoint of increasing the thermal conductivity between the evaporator 112 and the object to be cooled, It is preferable that it is a highly heat-conductive material (thermal good conductor) such as copper or aluminum.

  The evaporator 112 is connected to the evaporator 122 of the lower display shelf 120, which will be described later, via a first connection pipe 160, and is connected to the working medium storage container 130 and the reactor 140 via a second connection pipe 170. ing. A liquid working medium (hereinafter referred to as “working medium liquid 10”) is supplied to the evaporator 112 from the working medium storage container 130.

  The evaporator 112 preferably has a structure having a vacuum resistance such as rib processing or a corrugated plate structure. The material constituting the evaporator 112 is preferably a highly heat-conductive material (thermal good conductor) such as copper or aluminum from the viewpoint of enhancing thermal conductivity, when it does not affect corrosion, vacuum retention, or the like. . The internal structure of the evaporator 112 is not particularly limited as long as the gas flow path and the liquid flow path are secured, and a heat transfer structure such as a fin may be included.

  Of the inner wall surface of the evaporator 112, the surface 112a on the side in contact with the display shelf top plate 111 is connected to the second connecting pipe 170 from the viewpoint of efficiently supplying the working medium liquid 10 to the inside of the evaporator 112. It is preferable to incline downward from the side toward the tip of the upper display shelf 110. The inclined surface 112a is preferably provided with a wick 113 that moves the working medium liquid 10 by capillary action.

  The wick 113 can permeate and transport a liquid. As the wick 113, for example, paper, cloth, non-woven fabric, carbon fiber cloth, metal non-woven fabric, metal mesh, porous metal can be used, but there is no deterioration, corrosion, degassing, and high heat transfer performance. It is preferably a carbon fiber or a metal material.

  Further, it is preferable that a liquid reservoir 114 capable of storing the working medium liquid 10 is provided inside the evaporator 112. Thereby, even if the supply of the working medium liquid 10 is not performed continuously, the working medium liquid 10 can be held in the evaporator 112, and the cooling capacity can be maintained.

  The liquid reservoir 114 is preferably provided so as to be in contact with the wick 113 at least in part. Thereby, even if the supply of the working medium liquid 10 is not continuously performed, the working medium liquid 10 is supplied to the wick 113 to maintain the wet state, and cooling by evaporation from the surface of the wick 113 can be maintained.

  The lower display shelf 120 is attached to the inside of the opening of the display shelf housing 101 having a substantially U-shaped cross section at the front opening so as to be positioned below the upper display shelf 110. The lower display shelf 120 can have the same configuration as the upper display shelf 110, and includes a display shelf top plate 121 and an evaporator 122.

  The evaporator 122 is connected to the evaporator 112 and the working medium liquid receiving container 150 via the first connection pipe 160. Further, it is preferable that a wick 123 and a liquid reservoir 124 are provided inside the evaporator 122.

  The working medium storage container 130 is a tank filled (contained) with the working medium liquid 10. The working medium storage container 130 is disposed above the upper display shelf 110, for example, above the display shelf housing 101, and is connected to the evaporator 112 or the evaporator 112 via the liquid supply pipe 131 and the liquid supply valve V1. The second connecting pipe 170 is connected.

  When the liquid supply pipe 131 is connected to the evaporator 112, the liquid supply pipe 131 is a wick 113 provided on the surface 112 a on the side in contact with the display shelf top plate 111 on the inner wall surface of the evaporator 112. It is preferable that it is connected so that it may touch. Accordingly, the working medium liquid 10 supplied from the working medium storage container 130 via the liquid supply pipe 131 is efficiently supplied to the evaporator 112.

  The working medium storage container 130 is connected to the maintenance liquid replenishment port 132 via the maintenance liquid supply valve V2. The working medium storage container 130 is supplied with the working medium liquid 10 from the maintenance liquid replenishment port 132.

  The working medium storage container 130 is connected to a maintenance vacuum exhaust port 133 via a second connection pipe 170 and a maintenance gas flow valve V3. The inside of the working medium storage container 130 can be evacuated by the maintenance vacuum exhaust port 133.

  The working medium liquid 10 is not particularly limited as long as it reacts with the gas-solid reaction heat storage material 141, and examples thereof include water and alcohol. In addition, as the working medium liquid 10, a liquid in which a solute is mixed and a freezing point is lowered may be used from the viewpoint of suppressing freezing by vaporization cooling. Specifically, when the working medium liquid 10 is water, for example, calcium chloride or ethylene glycol can be used as the solute. In addition, when the freezing point is lowered by mixing the solute with the working medium liquid 10, the liquid in the evaporators 112 and 122 is suppressed from the viewpoint of suppressing the concentration in the evaporators 112 and 122. A structure without the reservoirs 114 and 124 can also be adopted.

  The reactor 140 is connected to the evaporator 112 via the second connection pipe 170, the gas flow valve V4, and the reactor valve V5. The reactor 140 is connected to the working medium storage container 130 via the second connecting pipe 170, the maintenance gas flow valve V3, the maintenance gas flow valve V6, and the reactor valve V5. The reactor 140 is connected to the maintenance vacuum exhaust port 133 via the second connection pipe 170, the reactor valve V5, and the maintenance gas flow valve V6.

  The reactor 140 also contains a gas-solid reaction heat storage material 141 that reacts with a gaseous working medium (hereinafter referred to as “working medium gas”).

  The gas-solid reaction heat storage material 141 adsorbs the working medium gas. As the gas-solid reaction heat storage material 141, for example, an adsorbent such as activated carbon, silica gel, or zeolite, or a chemical heat storage material such as calcium oxide, magnesium oxide, calcium sulfate, or calcium chloride can be used.

  The working medium liquid receiving container 150 is provided below the lower display shelf 120 and is connected to the evaporator 122 via the first connection pipe 160. A working medium liquid 10 overflowing from the evaporator 122 is stored in the working medium liquid receiving container 150.

  The first connecting pipe 160 is a gas flow path that connects between the evaporator 112 and the evaporator 122 and between the evaporator 122 and the working medium liquid receiving container 150. The first connection pipe 160 is preferably made of a bellows pipe having flexibility and a certain degree of elasticity. This facilitates installation of the upper display shelf 110 and the lower display shelf 120 on the shelf installation unit 102. Moreover, if it is the expansion-contraction range of bellows piping, the attachment position of the upper display shelf part 110 and the lower display shelf part 120 can be changed, without changing the 1st connection pipe 160. FIG.

  In the vicinity of the connection portion of the first connection pipe 160 with the evaporator 122, there is a dripping liquid guiding section 161 for guiding the working medium liquid 10 that drops inside the first connection pipe 160 to the evaporator 122. It is preferable to be provided. The dropped liquid guiding part 161 can have the same configuration as the dropped liquid guiding part 171 provided in the second connecting pipe 170 described later.

  The second connection pipe 170 is a gas flow path that connects the evaporator 112 with the working medium storage container 130 and the reactor 140 and between the working medium storage container 130 and the reactor 140.

  In the vicinity of the connection portion between the second connection pipe 170 and the evaporator 112, there is a dripping liquid guiding section 171 for guiding the working medium liquid 10 that drops inside the second connection pipe 170 to the evaporator 112. It is preferable to be provided.

  The dripping liquid guiding portion 171 will be described with reference to FIG.

  FIG. 2 is an enlarged view of the vicinity of the connection portion between the evaporator and the connection pipe in the cooling device according to the first embodiment of the present invention. More specifically, FIG. 2 (a) and FIG. 2 (b) are schematic cross-sectional views in which the vicinity of the connection portion between the evaporator and the connection pipe in the cooling device is enlarged, and FIG. 2 (c) is FIG. FIG. The arrows in FIGS. 2A and 2B indicate the flow of the working medium liquid 10.

  As the dripping liquid guiding part 171, as shown in FIG. 2A, it is preferable to form a flow path of the working medium liquid 10 by providing a wick 171a on the inner tube wall of the second connecting pipe 170. Further, as the dripping liquid guiding portion 171, as shown in FIG. 2C, a member 171b having a C-shaped cross section is provided on the inner pipe wall of the second connecting pipe 170 as shown in FIG. 2B. What forms the flow path of the working-medium liquid 10 by this is preferable.

  The control device 190 controls opening and closing operations of the liquid supply valve V1, the maintenance liquid supply valve V2, the maintenance gas flow valve V3, the gas flow valve V4, the reactor valve V5, and the maintenance gas flow valve V6. The control device 190 operates when power is supplied from, for example, the storage battery 191. In addition, the liquid supply valve V1, the maintenance liquid supply valve V2, the maintenance gas flow valve V3, the gas flow valve V4, the reactor valve V5, and the maintenance gas flow valve V6 are operated when power is supplied from, for example, the storage battery 191. To do.

  Next, the operation of the cooling device according to the first embodiment of the present invention will be described with reference to FIG.

  Below, although the case where water is used as the working medium liquid 10 and calcium chloride is used as the gas-solid reaction heat storage material 141 will be described, the present invention is not limited in this respect. In addition, calcium chloride takes the form of an anhydride, 1 water, 2 water, 4 water, 6 water, but in the first embodiment, the heat storage state is set to an anhydrous state by a hydration reaction with water vapor. A description will be given assuming that there are four waters.

  First, the control device 190 opens the liquid supply valve V1. Thereby, the water filled in the working medium storage container 130 is supplied to the second connection pipe 170 connected to the evaporator 112 via the liquid supply pipe 131 (in the drawing, the arrows “a1” and Indicated by “a2”). The water supplied to the second connecting pipe 170 is supplied to the wick 113 provided on the upper inner wall of the evaporator 112 through the inner pipe wall of the second connecting pipe 170 (in the figure, the arrow “a3”). Indicated by

  At this time, the surface of the inner wall surface of the evaporator 112 that is in contact with the display shelf top plate 111 is inclined downward from the connection portion side with the second connection pipe 170 toward the tip of the upper display shelf portion 110. Yes. For this reason, while water is impregnated in the wick 113, the water travels through the inner wall surface of the evaporator 112 on the side in contact with the display shelf top plate 111, flows to the tip of the upper display shelf 110, and the wick 113 below the evaporator 112. Flows into the shallow liquid reservoir 114 where the end of the liquid is immersed.

  The water overflowing from the liquid reservoir 114 flows from the connection portion between the lower part of the evaporator 112 and the first connection pipe 160 to the first connection pipe 160 (indicated by arrows “a4” and “a5” in the figure). ). The water flowing into the first connecting pipe 160 is supplied to the wick 123 provided on the upper inner wall of the evaporator 122 through the inner pipe wall of the first connecting pipe 160 (in the figure, an arrow “a6”). And "a7").

  The water supplied to the wick 123 flows along the surface of the inner wall surface of the evaporator 122 in contact with the display shelf top plate 121 while being impregnated in the wick 123, to the tip of the lower display shelf 120, and the evaporator 122 It flows into a shallow liquid reservoir 124 where the end of the lower wick 123 is immersed.

  The water overflowing from the liquid reservoir 124 flows downward from the connection portion between the lower portion of the evaporator 122 and the first connection pipe 160, travels along the inner tube wall of the first connection pipe 160, and is a working medium liquid receiving container. 150 (indicated by arrows “a8” and “a9” in the figure).

  The control device 190 closes the liquid supply valve V <b> 1 after sufficient water is supplied into the evaporators 112 and 122.

  For the sake of simplicity, FIG. 1 illustrates a configuration in which two stages of evaporators (evaporator 112 and evaporator 122) are provided in the height direction, but the present invention is limited in this respect. It is not something. For example, the number of evaporator stages can be set according to the number of display shelves. In such a case, the working medium liquid 10 supplied to the uppermost evaporator passes through the first connection pipe 160 to evaporate the upper stage. Is fed in cascade from the evaporator to the lower evaporator. Changing the number of stages of the evaporator is realized by changing the number of evaporators, the length and the number of the first connection pipe 160.

  Further, since the water overflowing from the evaporator 122 is stored in the working medium liquid receiving container 150, the interior of the evaporator 112 of the lower display shelf 120 is filled with water even when excessive water supply occurs. There is nothing.

  Subsequently, the control device 190 opens the gas flow valve V4. Thereby, the water vapor inside the evaporators 112 and 122 moves to the reactor 140 via the first connection pipe 160 and the second connection pipe 170 (indicated by an arrow “A” in the figure). The water vapor transferred to the reactor 140 reacts with anhydrous calcium chloride filled in the reactor 140. The reactor valve V5 is a valve used for maintenance and is opened in advance.

  At this time, the water vapor inside the first connecting pipe 160 and the second connecting pipe 170 reacts with calcium chloride, and the water vapor pressure in the system decreases, so the water inside the evaporators 112 and 122 evaporates. That is, the display shelf top plates 111 and 121 that are in thermal contact with the evaporators 112 and 122 can be cooled by the latent heat of evaporation. As a result, the objects to be cooled displayed on the display shelf top plates 111 and 121 can be cooled.

  Since the evaporation of water inside the evaporators 112 and 122 occurs in the wicks 113 and 123 and the liquid reservoirs 114 and 124, the evaporators 112 and 122 and the display shelf top plates 111 and 121 can be efficiently cooled. . The opening and closing of the liquid supply valve V1 and the opening of the gas flow valve V4 may or may not be simultaneous.

  Further, when sufficient water is held in the evaporators 112 and 122 at the stage of starting the cooling operation, the liquid supply from the working medium storage container 130 may not be performed.

  In addition, calcium chloride generates heat due to hydration, and hydration does not proceed unless the heat is removed. Therefore, heat removal is promoted by a method such as attaching a fin to the exterior of the reactor 140 or bringing it into thermal contact with the ground. It is preferable. Moreover, it is preferable to attach a contact prevention member so that a person may not touch the heated reactor 140.

  In addition, since the controller 190 appropriately opens the liquid supply valve V1 during the cooling operation to supply water to the evaporators 112 and 122, the controller 190 does not deplete the water inside the evaporators 112 and 122. Cooling can be performed continuously.

  Subsequently, when the control device 190 closes the gas flow valve V4, the water vapor movement is stopped and the cooling operation is stopped.

  If the hydration reaction of calcium chloride does not proceed completely after the cooling operation is stopped and sufficient hydration ability remains, the cooling operation can be continued by performing the above procedure again. On the other hand, when the hydration reaction of calcium chloride proceeds and the hydration capacity necessary for continuing the cooling operation is insufficient, the cooling operation can be performed again by performing maintenance.

  As maintenance, first, with the liquid supply valve V1 and the maintenance liquid supply valve V2 closed, the system is opened to the atmosphere by opening other valves. Subsequently, the working medium liquid receiving container 150 is removed, and water accumulated in the working medium liquid receiving container 150 is removed, and then the working medium liquid receiving container 150 is attached again.

  Subsequently, the maintenance liquid supply valve V2 is opened, the working medium storage container 130 is filled with water from the maintenance liquid replenishment port 132, and then the maintenance liquid supply valve V2 is closed. It is preferable that the water filled in the working medium storage container 130 is evacuated in advance and the dissolved gas is degassed.

  Subsequently, the maintenance gas flow valve V3 and the gas flow valve V4 are closed, and the reactor 140 containing calcium chloride in which the hydration reaction has progressed is replaced with the reactor 140 containing anhydrous calcium chloride. After replacing the reactor 140, the inside of the reactor 140 is evacuated from the maintenance vacuum exhaust port 133 by a vacuum pump or the like, and the reactor valve V5 is closed.

  Subsequently, the maintenance gas flow valve V3 and the gas flow valve V4 are opened, and after evacuation in the system other than the reactor 140, the maintenance is completed by closing all the valves, and cooling can be performed again. It becomes like this.

  In the above-described operation of the cooling device, the valve is opened and closed by the control device 190. However, the present invention is not limited in this respect, and the valve is manually opened and closed. Also good. When manually opening and closing the valve, it is preferable to determine the mounting position of the valve so that the operator can easily open and close the valve.

  As described above, according to the cooling device according to the first embodiment of the present invention, the working medium liquid 10 is supplied to the evaporator 112 positioned at the uppermost stage via the liquid supply pipe 131, and the first Via the connecting pipe 160, the vapor is supplied in order from the evaporator 112 located at the uppermost stage to the evaporator 122 located at the lowermost stage. For this reason, cooling with a large load can be continuously performed without increasing the capacity of the evaporators 112 and 122. In addition, a plurality of display shelves can be simultaneously cooled.

  Further, according to the cooling device according to the first embodiment of the present invention, the evaporator 112 and the evaporator 122 are connected via the first connection pipe 160. Further, the evaporator 112 and the working medium storage container 130 are connected via the liquid supply pipe 131. For this reason, a complicated structure is not required. It can also be added to existing refrigerated showcases.

  In the first embodiment of the present invention, the form in which the cooling device is applied to the open showcase-type refrigerated showcase has been described. However, any showcase having a display shelf may be used, and a refrigerated show with a door may be used. It may be a case.

  Further, as shown in FIG. 3, heat transfer fins 115 and 125 are provided outside the evaporators 112 and 122, and at least one of the evaporators 112 and 122 and the heat transfer fins 115 and 125 is connected to the display shelf top plates 111 and 121. It is preferable to have a configuration in contact. Thereby, heat exchange with the outside can be promoted, the cooling performance can be improved, or the volume of the evaporators 112 and 122 can be reduced.

(Second Embodiment)
The configuration of the cooling device according to the second embodiment of the present invention will be described with reference to FIG. 4 by taking as an example a case where it is applied to an open showcase-type refrigerated showcase. FIG. 4 is a schematic configuration diagram of a cooling device according to the second embodiment of the present invention.

  The cooling device according to the second embodiment of the present invention has a working medium storage container 130 installed behind the display shelf housing 101 ("right direction" in the figure), above the working medium storage container 130. It differs from the cooling device according to the first embodiment in that a condenser 180 is provided.

  Further, in the cooling device according to the second embodiment of the present invention, the water meter 116 and the water meter 126 are provided inside the evaporator 112 and the evaporator 122, and the water level is placed in the working medium storage container 130 and the working medium liquid receiving container 150. The cooling device according to the first embodiment is different in that a total 136 and a water level meter 156 are provided.

  The cooling device according to the second embodiment of the present invention is different from the cooling device according to the first embodiment in that a liquid supply pipe 134 is provided in the liquid supply pipe 131.

  Moreover, the cooling device according to the second embodiment of the present invention is the same as the cooling device according to the first embodiment in that the display shelf housing 101 is provided with a cold insulation curtain 103 that covers the opening of the display shelf housing 101. Different.

  The cooling device according to the second embodiment of the present invention is different from the cooling device according to the first embodiment in that a regeneration heating mechanism 142 is provided inside the reactor 140.

  Hereinafter, a description will be given focusing on differences from the first embodiment.

  The cooling device according to the second embodiment of the present invention includes an upper display shelf 110, a lower display shelf 120, a working medium storage container 130, a reactor 140, a working medium liquid receiving container 150, and a first display shelf. It has a connection pipe 160, a second connection pipe 170, a condenser 180, and a control device 190.

  The upper display shelf portion 110 is attached to the inside of the opening of the display shelf housing 101 having a substantially U-shaped cross section at the front opening. In addition, a cooling curtain 103 that covers the opening is provided at the opening of the display shelf housing 101.

  The cool curtain 103 is made of a transparent flexible resin or the like, and can have a structure in which, for example, a plurality of strip-shaped resin plates are arranged, and the cool air inside the display shelf housing 101 is diffused by stagnation. To suppress. Thereby, the low temperature maintenance capability inside the display shelf housing | casing 101 can be improved, the external heat input to the evaporators 112 and 122 can be suppressed, and a cooling load can be reduced. As a result, the supply frequency of the working medium liquid 10 to the evaporators 112 and 122 can be reduced, and the power consumption of the storage battery 191 required for driving the liquid feed pump 134 described later can be reduced. Moreover, since the reaction of the gas-solid reaction heat storage material 141 becomes gentle, the duration of the cooling capacity can be extended.

  The cold insulation curtain 103 may be manually attached, or may be provided with a mechanism that automatically turns off the curtain at the start of the cooling operation.

  The upper display shelf 110 has an evaporator 112. A water meter 116 is provided inside the evaporator 112. The water meter 116 detects the amount of the working medium liquid 10 stored in the evaporator 112. In addition, about another structure, it can be set as the structure similar to 1st Embodiment.

  The lower display shelf 120 has an evaporator 122. A water meter 126 is provided inside the evaporator 122. The water meter 126 detects the amount of the working medium liquid 10 stored in the evaporator 122. In addition, about another structure, it can be set as the structure similar to 1st Embodiment.

  The working medium storage container 130 is installed behind the display shelf housing 101, and is connected to the evaporator 112 or the second evaporator 112 via the liquid supply pipe 131, the liquid feed pump 134, and the liquid supply valve V1. A connection pipe 170 is connected.

  The liquid feed pump 134 is provided in the path of the liquid supply pipe 131 and operates when power is supplied from the storage battery 191. The liquid feed pump 134 supplies the working medium liquid 10 filled in the working medium storage container 130 to the evaporator 112 via the liquid supply pipe 131.

  The working medium storage container 130 is provided with a water level gauge 136. The water level gauge 136 detects the water level of the working medium liquid 10 filled in the working medium storage container 130. In addition, about another structure, it can be set as the structure similar to 1st Embodiment.

  The reactor 140 is connected to the evaporator 112 via the second connection pipe 170, the gas flow valve V4, and the reactor valve V5. The reactor 140 is connected to the working medium storage container 130 through the second connection pipe 170, the reactor valve V5, and the regeneration valve V7. The reactor 140 is connected to the maintenance vacuum exhaust port 133 via the second connection pipe 170, the reactor valve V5, and the maintenance gas flow valve V6.

  A regeneration heating mechanism 142 is provided inside the reactor 140. As the regeneration heating mechanism 142, for example, an electric heater or a heat medium heated by exhaust heat / solar heat can be used. In order to prevent excessive condensation other than in the condenser 180, it is preferable that the outer wall of the second connection pipe 170 at the time of regeneration of the gas-solid reaction heat storage material 141 is insulated from other than the condenser 180. In addition, about another structure, it can be set as the structure similar to 1st Embodiment.

  The working medium liquid receiving container 150 is connected to the working medium storage container 130 via the liquid supply pipe 131, the liquid supply valve V1, and the liquid supply valve V8. The working medium liquid receiving container 150 is provided with a water level gauge 156. The water level meter 156 detects the water level of the working medium liquid 10 stored in the working medium liquid receiving container 150. In addition, about another structure, it can be set as the structure similar to 1st Embodiment.

  The first connection pipe 160 and the second connection pipe 170 can have the same configuration as in the first embodiment.

  The condenser 180 is provided so as to cover the second connection pipe 170 above the working medium storage container 130 and has a heat dissipation structure.

  The control device 190 opens and closes the liquid supply valve V1, the gas flow valve V4, the reactor valve V5, the liquid supply valve V6, the regeneration valve V7 and the liquid supply valve V8, the operation of the liquid feed pump 134, and the regeneration heating mechanism 142. To control the operation. Further, the control device 190 detects the values of the water meters 116 and 126 and the water level meters 136 and 156. Moreover, the control apparatus 190 detects whether the power supply from a switchboard is interrupted | blocked. The control device 190 operates when power is supplied from, for example, the storage battery 191. In addition, the liquid supply valve V1, the gas flow valve V4, the reactor valve V5, the liquid supply valve V6, the regeneration valve V7, and the liquid supply valve V8 operate when power is supplied from, for example, the storage battery 191.

  Next, the operation of the cooling device according to the second embodiment of the present invention will be described with reference to FIG.

  Although the case where water is used as the working medium liquid 10 and calcium chloride is used as the gas-solid reaction heat storage material 141 will be described below as in the first embodiment, the present invention is not limited in this respect.

  In the cooling device according to the second embodiment of the present invention, for example, when the power supply from the switchboard is shut off due to a power failure or the like, the control device 190 detects the cutoff of the power supply and starts the cooling operation described below.

  When the controller 190 detects the interruption of the power supply, it opens the liquid supply valve V1 and drives the liquid feed pump 134. Thereby, the water filled in the working medium storage container 130 is supplied to the second connection pipe 170 connected to the evaporator 112 via the liquid supply pipe 131 (in the drawing, the arrows “a1” and Indicated by “a2”).

  The control device 190 determines whether or not there is water inside the working medium liquid receiving container 150 by detecting the value of the water level meter 156 provided in the working medium liquid receiving container 150. When it is determined that there is water inside the working medium liquid receiving container 150, the control device 190 opens the liquid supply valve V8 instead of the liquid supply valve V1, and drives the liquid feeding pump 134. As a result, the water filled in the working medium liquid receiving container 150 is supplied to the second connecting pipe 170 connected to the evaporator 112 via the liquid supply pipe 131 (in the figure, the arrow “a1”). And “a2”).

  The water supplied to the second connecting pipe 170 is supplied to the evaporator 112 and the evaporator 122 and then stored in the working medium liquid receiving container 150 (in the drawing, the arrow “a3”), as in the first embodiment. ”To“ a9 ”).

  Further, the control device 190 detects the values of the water meters 116 and 126 provided in the evaporators 112 and 122. The control device 190 determines whether or not sufficient water is being supplied into the evaporators 112 and 122 based on the values detected by the water meters 116 and 126. When it is determined that sufficient water is supplied into the evaporators 112 and 122, the control device 190 stops the operation of the liquid feed pump 134 and opens the liquid supply valve (liquid supply valve). V1 or the liquid supply valve V8) is closed.

  Further, when detecting the restoration of the power supply, the control device 190 controls the opening / closing operation of the valve so as to stop the cooling operation.

  As described above, when the power supply to the cooling device is interrupted, the control device 190 starts the cooling operation by automatically detecting the interruption of the power supply. For this reason, the cooling operation can be continued even when the power supplied to the cooling device is shut off.

  Further, the control device 190 depletes the water inside the evaporators 112 and 122 in order to determine whether or not to supply water to the evaporators 112 and 122 by detecting the values of the water meters 116 and 126. Therefore, a stable cooling operation can be performed.

  Subsequently, the control device 190 opens the gas flow valve V4. Thereby, the water vapor inside the evaporators 112 and 122 moves to the reactor 140 via the first connection pipe 160 and the second connection pipe 170 (indicated by an arrow “A” in the figure). The water vapor transferred to the reactor 140 reacts with anhydrous calcium chloride filled in the reactor 140. The reactor valve V5 is a valve used for maintenance and is opened in advance.

  At this time, the water vapor inside the first connecting pipe 160 and the second connecting pipe 170 reacts with calcium chloride, and the water vapor pressure in the system decreases, so the water inside the evaporators 112 and 122 evaporates. That is, the display shelf top plates 111 and 121 that are in thermal contact with the evaporators 112 and 122 can be cooled by the latent heat of evaporation. As a result, the objects to be cooled displayed on the display shelf top plates 111 and 121 can be cooled.

  Subsequently, when the control device 190 closes the gas flow valve V4, the water vapor movement is stopped and the cooling operation is stopped.

  After stopping the cooling operation, the control device 190 detects the amount of water remaining in the system by the water meters 116 and 126 and the water level meters 136 and 156, and calculates the amount of decrease from the amount of water at the time of starting the cooling operation. By calculating, the reaction rate of the gas-solid reaction heat storage material 141 is calculated. Then, the control device 190 determines whether or not regeneration of the gas-solid reaction heat storage material 141 is necessary based on the calculated reaction rate of the gas-solid reaction heat storage material 141. When it is determined that the gas-solid reaction heat storage material 141 needs to be regenerated, the control device 190 regenerates the gas-solid reaction heat storage material 141.

  When the gas-solid reaction heat storage material 141 is regenerated, the control device 190 opens only the reactor valve V5 and the regeneration valve V7, heats the gas-solid reaction heat storage material 141 by the regeneration heating mechanism 142, and performs a gas-solid reaction. The water vapor adsorbed on the heat storage material 141 is desorbed. The desorbed water vapor is condensed by the condenser 180 to be converted into water and filled into the working medium storage container 130 (indicated by an arrow “B” in the figure).

  The control device 190 detects the amount of water filled in the working medium storage container 130 with a water level gauge 136 provided in the working medium storage container 130, and fills the working medium storage container 130 with a desired amount of water. It is judged whether it was done. When determining that the desired amount of water is filled in the working medium storage container 130, the control device 190 stops the heating of the regeneration heating mechanism 142 and closes the reactor valve V5 and the regeneration valve V7.

  As described above, according to the cooling device according to the second embodiment of the present invention, the working medium liquid 10 is supplied to the evaporator 112 positioned at the uppermost stage via the liquid supply pipe 131, and the first Via the connecting pipe 160, the vapor is supplied in order from the evaporator 112 located at the uppermost stage to the evaporator 122 located at the lowermost stage. For this reason, cooling with a large load can be continuously performed without increasing the capacity of the evaporators 112 and 122. In addition, a plurality of display shelves can be simultaneously cooled.

  Further, according to the cooling device according to the second embodiment of the present invention, the evaporator 112 and the evaporator 122 are connected via the first connecting pipe 160. Further, the evaporator 112 and the working medium storage container 130 are connected via the liquid supply pipe 131. For this reason, a complicated structure is not required. It can also be added to existing refrigerated showcases.

  Particularly in the second embodiment of the present invention, the control device 190 detects the interruption and restoration of the power supply, and controls the start and stop of the cooling operation of the cooling device. For this reason, the cooling operation is possible even when the power supply is interrupted due to a power failure or the like.

  In the second embodiment of the present invention, the form in which the cooling device is applied to the open showcase-type refrigerated showcase has been described. However, any showcase having a display shelf may be used, and a refrigerated show with a door may be used. It may be a case.

  As mentioned above, although the cooling device was demonstrated by embodiment, this invention is not limited to the said embodiment, A various deformation | transformation and improvement are possible within the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Working medium liquid 101 Display shelf housing 110 Upper display shelf part 111 Display shelf top plate 112 Evaporator 113 Wick 114 Liquid storage part 115 Heat transfer fin 120 Lower display shelf part 121 Display shelf top panel 122 Evaporator 123 Wick 124 Liquid storage Unit 125 heat transfer fin 130 working medium storage container 131 liquid supply pipe 134 liquid feed pump 140 reactor 142 regeneration heating mechanism 141 gas-solid reaction heat storage material 150 working medium liquid receiving container 160 first connection pipe 161 dropped liquid guiding part 170 Second connecting pipe 171 Dropped liquid guiding part 180 Condenser 190 Control device V1 Liquid supply valve V4 Gas flow valve

Japanese Patent No. 2740402

Claims (10)

Inside the display shelf housing, a plurality of evaporators for vaporizing the liquid working medium connected to each other via the first connecting pipe in the height direction;
A gas-solid reaction heat storage material that is connected to the evaporator located at the uppermost stage among the plurality of evaporators via a second connection pipe and a first valve and reacts with the vaporized working gas is contained. Reactors,
An evaporator located in the uppermost stage among the plurality of evaporators, or a liquid supply pipe connected to the second connection pipe and supplying a liquid working medium to the plurality of evaporators,
The liquid working medium is sequentially supplied from the evaporator located at the uppermost stage to the evaporator located at the lowermost stage among the plurality of evaporators via the first connection pipe.
Cooling system. A working medium storage container that is disposed above the uppermost evaporator or the second connection pipe, is connected to the liquid supply pipe, and stores a liquid working medium;
A second valve for opening and closing the liquid supply pipe,
The cooling device according to claim 1. A working medium storage container connected to the liquid supply pipe and storing a liquid working medium;
A liquid feed pump provided in the liquid supply pipe and configured to supply a liquid working medium stored in the working medium storage container to the plurality of evaporators.
The cooling device according to claim 1. A regeneration heating mechanism provided inside the reactor and desorbing the working medium adsorbed on the gas-solid reaction heat storage material;
A condenser connected to the reactor and the working medium storage container via the second connection pipe and condensing the desorbed working medium;
The condenser condenses the working medium desorbed by the regeneration heating mechanism and supplies the condensed working medium to the working medium storage container.
The cooling device according to claim 2 or 3. A control device for controlling the amount of liquid working medium supplied from the working medium storage container to the plurality of evaporators;
The cooling device according to any one of claims 2 to 4. A wick is provided on the inner wall surface of each of the plurality of evaporators,
The cooling device according to any one of claims 1 to 5. A liquid reservoir provided inside each of the plurality of evaporators and capable of storing a liquid working medium;
The liquid reservoir is in contact with the wick;
The cooling device according to claim 6. A shelf on which the evaporator is mounted;
The shelf is
A heat transfer fin in contact with the evaporator;
A shelf top plate that is in contact with at least one of the evaporator and the heat transfer fins and is formed of a good thermal conductor;
The cooling device according to any one of claims 1 to 7. At least one of the inside of the first connecting pipe and the inside of the second connecting pipe has a dripping liquid guiding portion for guiding a liquid working medium to the evaporator.
The cooling device according to any one of claims 1 to 8. Having a control device that automatically starts cooling when a power failure is detected,
The cooling device according to any one of claims 1 to 9.

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