JP6003545B2 - Heat transfer system - Google Patents

Description

  The present invention relates to a heat transfer system.

  2. Description of the Related Art Conventionally, a heat transfer system configured to transfer heat (exhaust heat) of a heating element out of the system by repeatedly performing a phase change of a refrigerant accompanying evaporation and condensation in a sealed container is known ( For example, see Patent Document 1).

  Patent Document 1 includes an evaporation unit that evaporates an aqueous solution in which a benzotrial rust inhibitor is mixed in water (refrigerant), a condensing unit that condenses water vapor (refrigerant vapor) evaporated from the aqueous solution in the evaporation unit, A cooling system (heat transfer system) is disclosed that includes a steam passage through which water vapor flows and a condensate passage through which water (condensed water) flows while connecting the evaporation section and the condensation section. In the cooling system described in Patent Document 1, the heating element heats the aqueous solution in the evaporation section, whereby the heat of the heating element is transmitted to water vapor (refrigerant vapor) evaporated from the aqueous solution, and the heat of the water vapor in the condensation section. The heat generator is configured to be cooled by radiating heat to the outside air. Note that a permeable membrane is provided at a connection portion between the condensing unit and the condensate passage, and condensed water (pure water) on the condensing unit side and aqueous solution on the evaporation unit side are separated by the osmotic membrane. As a result, due to the osmotic pressure based on the concentration difference between the condensed water in the condensing part and the aqueous solution containing the benzotrialol rust inhibitor in the evaporating part, the condensed water in the condensing part is gradually permeated into the evaporating part and is being evaporated The aqueous solution is diluted to a predetermined concentration.

JP 2011-220596 A

  However, in the cooling system (heat transfer system) described in Patent Document 1, the osmotic pressure of the solution is used as the driving force when returning the condensed water of the condensing unit to the evaporating unit. It seems that a certain amount of time is required to generate the pressure difference (osmotic pressure) of the solution. Moreover, since the osmosis membrane is used, the flow rate of the refrigerant (condensed water) flowing through the condensate passage is also limited, and the amount of refrigerant circulating in the system is greatly limited even when viewed as a cooling system. For this reason, there are problems that it takes time to start up the cooling system and that it is difficult to further improve the cooling capacity after starting the cooling system due to the limited amount of refrigerant circulation.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to quickly start up the system and increase the amount of refrigerant circulation to increase the cooling capacity. It is to provide a heat transfer system that can be improved.

  In order to achieve the above object, a heat transfer system according to one aspect of the present invention includes an evaporation unit that evaporates a refrigerant absorbed in a solution, a suction unit that stores the solution, and a refrigerant vapor evaporated in the evaporation unit. A condensing part for condensing the liquid, a first valve provided in a vapor passage connecting the evaporation part and the condensing part, and a second valve provided in a solution passage connecting the evaporation part and the suction part When the refrigerant evaporates and the concentration of the solution in the evaporation unit rises to a predetermined value, the solution in the evaporation unit moves to the suction unit by the pressure of the refrigerant vapor by closing the first valve and opening the second valve In addition, the refrigerant condensed in the condensing unit is configured to be sucked into the sucking unit using the internal pressure difference between the suction unit and the condensing unit.

  In the heat transfer system according to one aspect of the present invention, as described above, the first valve provided in the vapor passage that connects the evaporation section and the condensation section, and the solution passage that connects the evaporation section and the suction section. A second valve provided, and when the refrigerant evaporates and the concentration of the solution in the evaporation section rises to a predetermined value, the first valve is closed and the second valve is opened to open the pressure of the refrigerant vapor. The solution in the evaporation unit is moved to the suction unit by the above, and the refrigerant condensed in the condensing unit is sucked into the suction unit using the internal pressure difference between the suction unit and the condensing unit. The solution (concentrated solution) of the evaporating part is smoothly moved to the suction part in advance using the pressure of the refrigerant vapor based on the opening and closing operation of the second valve and the second valve, and the internal pressure between the suction part and the condensing part Utilizing the difference, the refrigerant (liquid refrigerant) in the condensing part is absorbed into the solution (concentrated solution). Can be mixed refrigerant solution was smoothly sucked into parts. That is, unlike the case where a solution having a relatively low concentration (dilute solution) is gradually permeated through the osmotic membrane and moved to a solution having a relatively high concentration (concentrated solution) over time, the suction unit The refrigerant in the condensing part (liquid refrigerant) is smoothly sucked into the suction part using the internal pressure difference between the condenser and the condensing part, so that the solution in the condensing part is mixed with the solution in the suction part without taking time. (Concentrated solution) can be diluted. As a result, the heat transfer system can be quickly started up. Also, unlike the case of using an osmotic membrane (osmotic pressure), the flow rate of refrigerant is not limited by utilizing the internal pressure difference between the suction part and the condensation part, so the cooling capacity is further increased by increasing the refrigerant circulation rate. Can be made.

  In the heat transfer system according to the above aspect, preferably further includes a third valve provided in a refrigerant passage connecting the condensing unit and the suction unit, and after the solution in the evaporation unit is moved to the suction unit, By closing the second valve and opening the third valve, the refrigerant condensed in the condensing part is sucked into the sucking part using the internal pressure difference between the suction part and the condensing part. As described above, after the solution (concentrated solution) in the evaporation unit is moved to the suction unit, it is condensed using the internal pressure difference between the suction unit and the condensation unit based on the opening / closing operation of the second valve and the third valve. The liquid refrigerant in the part can be sucked into the suction part in which the solution (concentrated solution) is stored through the refrigerant passage to mix the refrigerant with the solution. In other words, the second valve and the third valve can be used by utilizing the internal pressure difference between the suction unit and the condensing unit without providing a liquid feed pump that mechanically pumps the refrigerant (liquid refrigerant) of the condensing unit to the suction unit. Based on the opening and closing operation, smooth circulation of the liquid refrigerant from the condensing unit to the suction unit can be easily obtained.

  In the configuration further including the third valve, preferably, after the refrigerant condensed in the condensing unit is sucked into the suction unit, the first valve and the second valve are opened, whereby the solution in the suction unit is It is configured to be moved to the evaporating unit by the liquid level difference between the suction unit and the evaporating unit. Thus, after the liquid refrigerant in the condensing part is sucked into the suction part and mixed with the concentrated solution, the solution in the suction part that becomes a dilute solution based on the opening and closing operations of the first valve and the second valve is liquidized. Since it can be easily returned to the evaporating section using the surface difference, the evaporating section can evaporate the diluted solution (dilute solution) and obtain the refrigerant vapor again. That is, based on the opening / closing operation of the first valve, the second valve, and the third valve, the regeneration process of the refrigerant vapor in the evaporation unit, the condensation (liquefaction) process in the condensation unit of the regenerated refrigerant vapor, The process of diluting the solution (concentrated solution) with the refrigerant (liquid refrigerant) and the process of re-supplying the diluted solution to the evaporation section can be repeated in this order, driving the heat transfer system with smooth circulation of the refrigerant Can be made.

  In this case, it is preferable that a valve control unit that performs opening / closing control of the first valve, the second valve, and the third valve is further provided, and the concentration of the solution in the evaporation unit is increased to a predetermined value by evaporating the refrigerant. Further, the valve control unit performs control to close the first valve and open the second valve, and the solution in the evaporation unit is moved to the suction unit by the pressure of the refrigerant vapor, and then the second valve is operated by the valve control unit. Is closed and the third valve is opened, and the refrigerant in the condensing unit is sucked into the sucking unit by utilizing the internal pressure difference between the suction unit and the condensing unit. Thereafter, the valve control unit controls the first valve and the first valve. By controlling the opening of the second valve, the solution in the suction part is moved to the evaporation part due to the liquid level difference between the suction part and the evaporation part. If comprised in this way, since opening / closing operation | movement of a 1st valve, a 2nd valve, and a 3rd valve can be performed based on predetermined | prescribed timing using a valve control part, it is the refrigerant | coolant vapor | steam in an evaporation part. The regeneration process, the condensation (liquefaction) process in the condensation part of the regenerated refrigerant vapor, the solution transfer process from the evaporation part to the suction part, the dilution process of the solution (concentrated solution) with the refrigerant (liquid refrigerant) in the suction part, The re-feeding process of the solution to the evaporation section can be continuously repeated without limiting the amount of refrigerant circulation in the heat transfer system.

  In the heat transfer system according to the one aspect, preferably, the solution in the evaporation unit is moved to the suction unit while the temperature decreases, thereby reducing the internal pressure of the suction unit and reducing the internal pressure of the suction unit in which the solution is stored. The refrigerant condensed in the condensing part due to the pressure difference from the internal pressure of the condensing part is sucked into the suction part. If comprised in this way, since the internal pressure of the suction part where the solution was moved with the temperature fall of a solution (concentrated solution) will be in the state pulled down rather than the internal pressure of the condensation part with which refrigerant | coolant vapor | steam was enclosed, On the other hand, the liquid refrigerant in the condensing part can be sucked into the suction part by effectively utilizing the negative pressure state (low internal pressure state) on the suction part side. Thereby, a heat transfer system can be comprised, without providing the liquid feed pump etc. which mechanically pump the refrigerant | coolant (liquid refrigerant) of a condensation part to a suction part.

  In this case, preferably, the cooling unit is provided in a solution passage that connects the evaporation unit and the suction unit, and lowers the temperature of the solution when moving from the evaporation unit to the suction unit to be lower than the condensation temperature of the refrigerant vapor in the condensation unit. Is further provided. If comprised in this way, since the temperature of the concentrated solution moved from the evaporation part to the suction part is reliably lowered by the cooling part below the condensation temperature of the refrigerant vapor in the condensation part, the internal pressure of the suction part is reduced by the refrigerant vapor. It can be pulled down more easily than the internal pressure of the enclosed condensing part. Thereby, the liquid refrigerant in the condensing part can be reliably sucked into the suction part.

  In the configuration in which the refrigerant in the condensing unit is sucked into the suction unit by moving the solution in the evaporation unit to the suction unit while the temperature decreases, preferably, a refrigerant passage that connects the condensing unit and the suction unit is provided. The connecting portion between the condensing part and the refrigerant passage is disposed below the connecting portion between the refrigerant passage and the suction part. As described above, even when the refrigerant passage has an upward gradient from the condensing part toward the suction part, the suction of the concentrated solution in which the liquid refrigerant in the condensing part is stored due to the internal pressure difference between the suction part and the condensing part. Since the suction part is disposed below the condensing part (the refrigerant passage is configured in a downward gradient from the condensing part toward the sucking part), the suction part and the condensing part are not limited to the necessity. To form a heat transfer system.

  In the heat transfer system according to the above aspect, the solution passage is preferably sucked from the condensing unit in the suction unit and the first solution passage for moving the concentrated solution after the evaporation of the refrigerant from the evaporation unit to the suction unit. And a second solution passage for moving the dilute solution diluted with the refrigerant from the suction portion to the evaporation portion, and the second valve is a concentrated solution transfer valve provided in the first solution passage. And a dilute solution transfer valve provided in the second solution passage. If comprised in this way, the 1st solution channel | path which distribute | circulates a concentrated solution by opening / closing the concentrated solution movement valve, and the 2nd solution channel | path which distribute | circulates a diluted solution by opening / closing the diluted solution movement valve | bulb separately Therefore, the first solution passage and the second solution passage can be arranged in an optimum form between the evaporation portion and the suction portion, respectively. Thereby, smooth distribution | circulation with a concentrated solution and the dilute solution containing a refrigerant | coolant can be aimed at.

  In the heat transfer system according to the above aspect, preferably, the separation unit that separates the refrigerant vapor and the solution by having a hole having a size that allows the refrigerant vapor evaporated in the evaporation unit to pass smoothly and does not allow the solution to pass therethrough. Is arranged. If comprised in this way, it can suppress effectively that the solution (concentrated solution) of an evaporation part with a refrigerant | coolant vapor | steam distribute | circulates a vapor | steam channel | path, and is mixed in a condensation part. Thereby, the refrigerant | coolant condensation process in a condensation part can be performed in the state which isolate | separated the refrigerant | coolant (refrigerant vapor | steam) from the solution (concentrated solution) reliably. As a result, the heat transfer system can be continuously driven in a more normal state.

  In the heat transfer system according to the above aspect, the evaporation unit, the suction unit, and the condensing unit are preferably mounted on a vehicle, and at least one exhaust heat of the vehicle engine, motor, battery, and heat accumulator is in the evaporation unit. It is transmitted to the evaporated refrigerant vapor, and is radiated to the outside in the condensing part or used as a heat source for the heat utilization device. In this way, by using a heat transfer system that can quickly start up the system and improve the cooling capacity, heat (exhaust heat) of a heat source (heating element) such as a vehicle engine, motor, battery, or regenerator can be reduced. It can be efficiently moved to the external environment or other heat utilization device.

  In the present application, apart from the heat transfer system according to the above aspect, the following configurations are also conceivable.

(Additional item 1)
That is, a heat transfer system according to another configuration of the present application includes an evaporation unit that evaporates the refrigerant absorbed in the solution, a suction unit that stores the solution, and a condensation unit that condenses the refrigerant vapor evaporated in the evaporation unit. When the refrigerant evaporates and the concentration of the solution in the evaporation unit rises to a predetermined value, the solution in the evaporation unit is moved to the suction unit while the temperature decreases due to the pressure of the refrigerant vapor, and the temperature of the suction unit After the refrigerant condensed in the condensing unit due to a decrease in internal pressure due to the decrease is sucked into the suction unit, the solution in the suction unit is moved to the evaporation unit due to the liquid level difference between the suction unit and the evaporation unit. . If comprised in this way, while making the solution (concentrated solution) of an evaporation part smoothly move to a suction part beforehand using the pressure of refrigerant vapor, the refrigerant of a condensation part by the fall of the internal pressure by the temperature fall of a suction part (Liquid refrigerant) can be smoothly sucked into the suction part in which the solution (concentrated solution) is stored to mix the refrigerant with the solution. That is, unlike the case where a solution having a relatively low concentration (dilute solution) is gradually permeated through the osmotic membrane and moved to the solution having a relatively high concentration (concentrated solution) over time, the evaporation unit Since the refrigerant (liquid refrigerant) of the condensing part is smoothly sucked into the suction part by utilizing the decrease in the internal pressure of the suction part due to the temperature drop of the solution moved from the suction part to the suction part, the suction part of the suction part is not required in time. The solution (concentrated solution) can be diluted by mixing a refrigerant with the solution. In addition, after the refrigerant condensed in the condensing unit is sucked into the suction unit, the solution (dilute solution) in the suction unit is moved to the evaporation unit due to the liquid level difference between the suction unit and the evaporation unit. A dilute solution) can be distributed smoothly. As a result, the heat transfer system can be quickly started up. In addition, unlike the case where an osmotic membrane (osmotic pressure) is used, the refrigerant flow rate is not limited by causing the suction unit to suck the refrigerant condensed in the condensing unit using the decrease in internal pressure due to the temperature drop in the suction unit. . Thus, the cooling capacity can be further improved by increasing the refrigerant circulation amount.

(Appendix 2)
In the heat transfer system according to another configuration of the present application, preferably, the first valve provided in the vapor passage connecting the evaporation unit and the condensation unit, and the solution passage connecting the evaporation unit and the suction unit are provided. The second valve is further closed, and the first valve is closed and the second valve is opened to move the solution in the evaporation section to the suction section, and the second valve is closed to condense in the condensing section. After the sucked refrigerant is sucked into the suction section, the solution of the suction section is moved to the evaporation section by opening the first valve and the second valve. If comprised in this way, the circulation path of a refrigerant | coolant can be easily formed using a 1st valve and a 2nd valve.

  According to the present invention, as described above, the heat transfer system can be quickly started up, and the cooling capacity can be further improved by increasing the refrigerant circulation amount.

It is the figure which showed the whole structure of the heat transfer system by 1st Embodiment of this invention. It is a figure for demonstrating the driving | running operation state (state 1) of the heat transfer system by 1st Embodiment of this invention. It is a figure for demonstrating the driving | running operation state (state 2) of the heat transfer system by 1st Embodiment of this invention. It is a figure for demonstrating the driving | running operation state (state 3) of the heat transfer system by 1st Embodiment of this invention. It is a figure for demonstrating the driving | running operation state (state 4) of the heat transfer system by 1st Embodiment of this invention. It is the figure which showed the whole structure of the heat transfer system by 2nd Embodiment of this invention. It is a figure for demonstrating the driving | running operation state (state 1) of the heat transfer system by 2nd Embodiment of this invention. It is a figure for demonstrating the driving | running operation state (state 2) of the heat transfer system by 2nd Embodiment of this invention. It is a figure for demonstrating the driving | running operation state (state 3) of the heat transfer system by 2nd Embodiment of this invention. It is a figure for demonstrating the driving | running operation state (state 4) of the heat transfer system by 2nd Embodiment of this invention. It is the figure which showed the whole structure of the heat transfer system by the modification of this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

(First embodiment)
With reference to FIGS. 1-5, the heat transfer system 100 by 1st Embodiment of this invention is demonstrated. In the heat transfer system 100 according to the first embodiment, by using a solution having a water absorption action and a refrigerant as a working medium (working fluid) at the time of heat transport, the heat of the heating element 90 is transported and moved to the external environment. (Heat dissipation) is possible. In addition, while using a lithium bromide (LiBr) aqueous solution as a solution having a water absorbing action (hygroscopic action), water is used as a refrigerant. The LiBr aqueous solution is an example of the “solution” in the present invention, and water is an example of the “refrigerant” in the present invention. Below, the structure of the heat transfer system 100 is demonstrated first, and the driving | operation operation | movement of the heat transfer system 100 is demonstrated after that.

  As shown in FIG. 1, the heat transfer system 100 according to the first embodiment includes an evaporating unit 10, a condensing unit 20, and a suction unit 30. Further, the evaporation unit 10 and the condensing unit 20 are connected (communication) by the vapor passage 41, and the condensing unit 20 and the suction unit 30 are connected (communication) by the refrigerant passage 42. Further, the evaporation unit 10 and the suction unit 30 are connected (communication) by the concentrated solution passage 43a. In addition to the concentrated solution passage 43a, the evaporation unit 10 and the suction unit 30 are connected (communicated) to each other through the diluted solution passage 43b. Thereby, between the evaporation part 10, the condensation part 20, and the suction | inhalation part 30, one closed cycle in which LiBr aqueous solution and a refrigerant | coolant (water) can distribute | circulate in a predetermined state is formed. The concentrated solution passage 43a and the diluted solution passage 43b are examples of the “first solution passage” and the “second solution passage” in the present invention, respectively.

  Here, in the first embodiment, the heat transfer system 100 is configured to be mountable on a vehicle such as a passenger car, a bus, and a truck, and the heat transfer system 100 is continuously based on predetermined operation control described later. It is configured to be driven. In this case, the heating element 90 is at least one of devices including a heat generating part (heat radiating part) such as an engine, a motor, a battery, or a heat accumulator in the vehicle. By driving the heat transfer system 100, the heat (exhaust heat) of the heating element 90 is transmitted to the refrigerant vapor that evaporates with the latent heat of evaporation in the evaporation unit 10, and is radiated to the atmosphere via the condensation unit 20. . Further, since the heat of the heating element 90 is dissipated to the external environment, the heating element 90 itself is cooled and maintained within a predetermined temperature range.

  The evaporation unit 10 includes a stainless steel container 11 in which the LiBr aqueous solution is stored. Further, a heat radiating portion (heat sink) 91 provided in the heating element 90 is exposed in the container 11. Thereby, in a state where the LiBr aqueous solution is stored in the container 11, the heat (exhaust heat) of the heating element 90 is transmitted to the LiBr aqueous solution via the heat radiating portion 91, and the LiBr aqueous solution is heated. Yes. Further, the LiBr aqueous solution is heated, whereby the refrigerant (water) absorbed in the LiBr aqueous solution is evaporated in the container 11. The concentration of the LiBr aqueous solution (the content ratio of LiBr with respect to water) is adjusted in advance so that the LiBr aqueous solution boils at a desired temperature.

  In addition, a liquid level detection sensor 12 and a liquid level detection sensor 13 for detecting the position (liquid level height) of the LiBr aqueous solution are provided on the side wall portion 11 a in the container 11. The liquid level detection sensor 12 is provided above the liquid level detection sensor 13. The liquid level detection sensors 12 and 13 are electrically connected to the valve control unit 70. In the heat transfer system 100, when the liquid level of the LiBr aqueous solution reaches the position of the liquid level detection sensor 12 or the liquid level detection sensor 13, valve control is performed based on the detection result of the liquid level detection sensor 12 or the liquid level detection sensor 13. The unit 70 is configured to perform predetermined control described later.

  Here, in the first embodiment, the flat plate-like separation portion 14 is provided at a position where the liquid surface height of the LiBr aqueous solution in the container 11 is higher than the position where it rises most during the operation. The separation unit 14 is disposed so as to extend substantially parallel to the liquid surface of the LiBr aqueous solution. The separation portion 14 is formed with a plurality of holes 14a penetrating the flat plate in the thickness direction. The hole 14a has a size that allows the refrigerant vapor to pass through smoothly and prevents the LiBr aqueous solution from passing therethrough. Thereby, when the LiBr aqueous solution stored in the container 11 is heated by the heat radiating portion 91 of the heating element 90, only the refrigerant vapor evaporated from the LiBr aqueous solution passes through the hole 14a and passes from the upper part in the container 11 to the vapor passage 41. Led. On the other hand, the LiBr aqueous solution is configured to fall downward after colliding with the separation unit 14 and stay in the container 11.

  The condensing unit 20 includes a stainless steel container 21 for condensing the refrigerant vapor. Further, a heat exchanger 61 (indicated by a two-dot chain line) of the heat exchange unit 60 is provided in the container 21. Here, the heat exchange unit 60 will be described. The heat exchange unit 60 is configured to be able to exchange heat between the heat exchanger 61 in which cooling water (coolant) made of antifreeze flows and the atmosphere (outside air). An air heat exchanger 62, a heat exchanger 61 and an air heat exchanger 62 are connected, and a cooling water circulation pipe 63 through which cooling water is circulated and a blower 64 are provided. Thereby, the heat exchange unit 60 radiates the heat of the refrigerant vapor in the container 21 to the outside air through the cooling water by driving the blower 64 in a state where the cooling water is circulated in the cooling water circulation pipe 63. It has a function. Therefore, the refrigerant vapor (high-temperature steam) that flows through the vapor passage 41 in the direction of the arrow P and is supplied to the condensing unit 20 is cooled in the condensing unit 20 with condensation latent heat (the refrigerant vapor is condensed (liquefied)). ). In addition, the condensed (liquefied) refrigerant is configured to be condensed water and stored in the container 21.

  In addition, a steam flow valve 51 is provided in the steam passage 41 that connects the evaporator 10 and the condenser 20. The steam flow valve 51 is electrically connected to the valve control unit 70, and is operated based on the valve opening / closing control of the valve control unit 70, so that the refrigerant vapor between the evaporation unit 10 and the condensation unit 20 is flown. The distribution (in the direction of arrow P) can be controlled. The steam flow valve 51 is an example of the “first valve” in the present invention.

  The suction unit 30 includes a stainless steel container 31 for temporarily storing the LiBr aqueous solution. A concentrated solution moving valve 52 a is provided in the concentrated solution passage 43 a that connects the evaporation unit 10 and the suction unit 30. The concentrated solution transfer valve 52 a is electrically connected to the valve control unit 70, and is operated based on the valve opening / closing control of the valve control unit 70, thereby circulating the LiBr aqueous solution from the evaporation unit 10 to the suction unit 30. It has a function. A dilute solution moving valve 52b is provided in the dilute solution passage 43b that connects the evaporation unit 10 and the suction unit 30. The dilute solution moving valve 52b is electrically connected to the valve control unit 70, and is operated based on the valve opening / closing control of the valve control unit 70, thereby circulating the LiBr aqueous solution from the suction unit 30 to the evaporation unit 10. It has a function. In addition, a condensed water transfer valve 53 is provided in the refrigerant passage 42 connecting the condensing unit 20 and the suction unit 30. The condensed water transfer valve 53 is electrically connected to the valve control unit 70, and is operated based on the valve opening / closing control of the valve control unit 70, whereby the liquid refrigerant (condensed water) is transferred from the condensation unit 20 to the suction unit 30. ). The concentrated solution transfer valve 52a and the diluted solution transfer valve 52b are examples of the “second valve” in the present invention. The condensed water transfer valve 53 is an example of the “third valve” in the present invention.

  Here, during the operation of the heat transfer system 100, the liquid level of the LiBr aqueous solution gradually decreases in the evaporation unit 10 as the refrigerant (water) evaporates from the LiBr aqueous solution. Further, as the refrigerant evaporates and the liquid level of the LiBr aqueous solution decreases, the concentration of the LiBr aqueous solution (the content ratio of LiBr with respect to water) increases. In this case, in the first embodiment, when the refrigerant evaporates and the concentration of the LiBr aqueous solution in the evaporation unit 10 rises to a predetermined value, the vapor circulation valve 51 is closed and the concentrated solution transfer valve 52a is opened. A concentrated LiBr aqueous solution that stays in the container 11 due to the pressure of the vapor flows in the concentrated solution passage 43a in the direction of the arrow Q and is moved to the suction unit 30 by a predetermined amount. Note that when the LiBr aqueous solution in the evaporation unit 10 is moved to the suction unit 30, the dilute solution moving valve 52b is closed.

  More specifically, when the liquid level of the LiBr aqueous solution (dilute solution) filled to a position slightly below the separation unit 14 in the initial stage of operation decreases with the evaporation of the refrigerant and reaches the position of the liquid level detection sensor 12 It is determined that the concentration of the LiBr aqueous solution in the container 11 has increased to a predetermined value. Based on the detection result of the liquid level by the liquid level detection sensor 12, the vapor distribution valve 51 is closed and the concentrated solution transfer valve 52a is opened. Thereby, the LiBr aqueous solution of the evaporation part 10 is smoothly moved to the suction part 30 using the pressure of the refrigerant vapor. When the concentrated solution moving valve 52 a is opened, the liquid level of the LiBr aqueous solution is lowered from the position of the liquid level detection sensor 12 as the LiBr aqueous solution moves to the suction unit 30. On the contrary, in the suction part 30, the LiBr aqueous solution is rapidly supplied, so that the liquid level in the container 31 rises.

  In the first embodiment, after the concentrated solution moving valve 52a is opened and the LiBr aqueous solution is moved to the suction unit 30 by a predetermined amount, this time, the concentrated solution moving valve 52a is closed and the condensed water moving valve is closed. By opening 53, the liquid refrigerant (condensed water) condensed in the condensing unit 20 using the internal pressure difference between the suction unit 30 and the condensing unit 20 flows through the refrigerant passage 42 in the direction of arrow P to the suction unit 30. It is configured to be aspirated. More specifically, as the LiBr aqueous solution moves from the evaporation unit 10 to the suction unit 30, the liquid level of the LiBr aqueous solution in the evaporation unit 10 decreases from the position of the liquid level detection sensor 12 and reaches the position of the liquid level detection sensor 13. Then, the concentrated solution transfer valve 52a is closed and the condensed water transfer valve 53 is opened. Thus, the liquid refrigerant (condensed water) from the condensing unit 20 is mixed with the concentrated LiBr aqueous solution stored in the suction unit 30 to dilute the solution. As a result, the liquid level of the LiBr aqueous solution in the container 31 further increases.

  In the first embodiment, the connection part 42 a between the condensing unit 20 and the refrigerant passage 42 is disposed below the connection part 42 b between the refrigerant passage 42 and the suction part 30. As described above, even when the refrigerant passage 42 has an upward gradient from the condensing unit 20 toward the suction unit 30, the condensing unit 20 is effectively used by utilizing the internal pressure difference generated between the suction unit 30 and the condensing unit 20. The refrigerant (liquid refrigerant) is smoothly sucked into the suction part 30 in which the LiBr aqueous solution (concentrated solution) is stored without restricting the circulation amount.

  In the first embodiment, after the refrigerant condensed in the condensing unit 20 is sucked into the suction unit 30, the vapor circulation valve 51 and the dilute solution moving valve 52b are opened at a predetermined timing (for concentrated solution moving). The valve 52a is kept closed). Thereby, the LiBr aqueous solution that has become a dilute solution in the suction unit 30 (container 31) is configured to flow through the dilute solution passage 43b in the direction of arrow P and be moved to the evaporation unit 10. Here, the liquid level of the LiBr aqueous solution (dilute solution) in the container 31 is higher than the liquid level of the LiBr aqueous solution (concentrated solution) in the container 11 (evaporating unit 10) (position of the liquid level detection sensor 13). Therefore, the LiBr aqueous solution (dilute solution) is configured to be quickly returned from the suction unit 30 to the evaporation unit 10 by utilizing the liquid level difference between the suction unit 30 and the evaporation unit 10. Thereby, the diluted solution from the suction unit 30 is mixed with the concentrated LiBr aqueous solution stored in the evaporation unit 10 to dilute the LiBr aqueous solution in the container 11.

  The liquid level in the container 11 starts to rise from the position of the liquid level detection sensor 13 along with the movement of the LiBr aqueous solution, returns to a position slightly below the separation unit 14 beyond the position of the liquid level detection sensor 12. Then, the LiBr aqueous solution that has become a dilute solution is heated again by the heating element 90 (heat dissipating part 91), and the refrigerant (water) is evaporated from the LiBr aqueous solution. Note that when the LiBr aqueous solution is returned from the suction unit 30 to the evaporation unit 10, the vapor circulation valve 51 is opened, so that the refrigerant vapor is pushed out to the vapor passage 41 as the liquid level rises in the container 11 and is condensed. 20 is supplied. Further, in the container 11, as the LiBr aqueous solution is heated (evaporation of the refrigerant), the concentration of the LiBr aqueous solution is gradually increased to change to a concentrated solution. That is, the liquid level in the container 11 gradually decreases toward the liquid level detection sensor 12.

  In the first embodiment, as shown in FIG. 1, the heat transfer system 100 includes a steam flow valve 51, a concentrated solution transfer valve 52 a, a dilute solution transfer valve 52 b, and a condensed water transfer valve 53. A valve control unit 70 for performing opening / closing control is provided. That is, when the refrigerant evaporates and the concentration of the LiBr aqueous solution in the evaporation unit 10 increases to a predetermined value (when the liquid level of the LiBr aqueous solution decreases and reaches the position of the liquid level detection sensor 12), the valve control unit 70 Control is performed to close the vapor circulation valve 51 and open the concentrated solution transfer valve 52a, and the LiBr aqueous solution in the evaporation unit 10 is temporarily moved to the suction unit 30 by the pressure of the refrigerant vapor. Thereafter, when the liquid level reaches the position of the liquid level detection sensor 13 along with the movement of the LiBr aqueous solution, the valve control unit 70 performs control to close the concentrated solution moving valve 52a and open the condensed water moving valve 53 to perform suction. Using the internal pressure difference between the unit 30 and the condensing unit 20, the liquid refrigerant in the condensing unit 20 is sucked into the suction unit 30 and the LiBr aqueous solution is diluted. Thereafter, the valve control unit 70 performs control to reopen the steam flow valve 51 and the dilute solution transfer valve 52b, so that the liquid level of the suction unit 30 is higher than the liquid level of the evaporation unit 10. Using this, the LiBr aqueous solution (dilute solution) in the suction unit 30 is moved to the evaporation unit 10.

  As described above, in the heat transfer system 100, the steam flow valve 51, the concentrated solution transfer valve 52 a, the dilute solution transfer valve 52 b, and the condensed water transfer by the valve control unit 70 together with the detection results of the liquid level detection sensors 12 and 13. Based on the opening / closing operation of the valve 53, the regeneration process of the refrigerant vapor in the evaporation unit 10, the condensation (liquefaction) process in the condensation unit 20 of the regenerated refrigerant vapor, and the LiBr aqueous solution (concentrated solution) from the evaporation unit 10 to the suction unit 30. And the subsequent dilution process of the LiBr aqueous solution (concentrated solution) with the liquid refrigerant in the suction unit 30 and the resupply process of the diluted LiBr aqueous solution to the evaporation unit 10 can be performed in this order. Has been. At this time, in the dilution process, the refrigerant (condensed water) is smoothly sucked (inflowed) from the condensing unit 20 to the suction unit 30 without restricting the circulation amount. Also in the resupply process, the LiBr aqueous solution diluted with the refrigerant (water) is smoothly moved from the suction unit 30 to the evaporation unit 10 at a predetermined flow rate.

  The timing of the opening / closing operation of the steam flow valve 51, the concentrated solution transfer valve 52a, the diluted solution transfer valve 52b, and the condensed water transfer valve 53 by the valve control unit 70 depends on the heat amount (exhaust heat amount) of the heating element 90. It is configured to be adjustable accordingly. Thereby, the circulation amount of the refrigerant circulating in the system is controlled to a desired value. In this heat transfer system 100, the amount of heat (exhaust heat amount) of the heating element 90 is condensed by adjusting the circulation amount of the refrigerant (water) flexibly and driving the system with smooth circulation of the refrigerant. It is possible to dissipate heat to the atmosphere via 20 (heat exchange unit 60). In other words, the refrigerant circulation amount can be increased or decreased according to the cooling load of the heating element 90, and the heat transfer system 100 is configured as a system capable of improving the cooling capacity according to the cooling load. ing. Further, in the heat transfer system 100, the heat of the heating element 90 is moved and radiated to the atmosphere by using the latent heat of vaporization and the latent heat of condensation accompanying the phase change of the refrigerant, so that the conventional cooling device using the sensible heat change by the cooling water Compared to a (water-cooled radiator device) or the like, the same cooling capacity can be exhibited in a state where the amount of refrigerant (water amount) sealed in the cycle is smaller. Moreover, since the reduction of the refrigerant amount leads to the reduction of the heat capacity, it contributes to the quick start of the heat transfer system 100.

  In the first embodiment, the cooling unit 80 is provided in the concentrated solution passage 43 a that connects the evaporation unit 10 and the suction unit 30. Here, the cooling unit 80 has a function of removing some heat from the LiBr aqueous solution and radiating it to the external environment when the LiBr aqueous solution (concentrated solution) heated in the evaporation unit 10 flows through the concentrated solution passage 43a. Yes. In this case, the cooling unit 80 may be configured similarly to the heat exchange unit 60 described above, or may be a thermoelectric conversion unit using a Peltier element or the like. By providing the cooling unit 80, the temperature of the LiBr aqueous solution when moved from the evaporation unit 10 to the suction unit 30 is configured to be lower than the condensation temperature of the refrigerant vapor in the condensing unit 20. Further, due to the cooling action of the cooling unit 80, the temperature of the LiBr aqueous solution (concentrated solution) moved from the evaporation unit 10 to the suction unit 30 is surely lower than the condensation temperature of the refrigerant vapor in the condensation unit 20, so the suction unit 30 ( The internal pressure of the container 31) is more easily reduced than the internal pressure of the condensing part 20 (container 21) in which the refrigerant vapor is enclosed. That is, when the LiBr aqueous solution in the evaporation unit 10 is moved to the suction unit 30 with a temperature drop, when the vapor circulation valve 51 is closed and the concentrated solution transfer valve 52a is opened at a later timing, the LiBr aqueous solution is The refrigerant (condensed water) condensed in the condensing unit 20 is easily sucked into the sucking unit 30 due to the pressure difference between the internal pressure of the stored suction unit 30 and the internal pressure of the condensing unit 20. In this way, the heat transfer system 100 is configured.

  Next, the operation of the heat transfer system 100 will be described with reference to FIGS.

  First, in the driving operation state (state 1) shown in FIG. 2, the valve control unit 70 opens the steam flow valve 51 of the steam passage 41, while the concentrated solution transfer valve 52a of the concentrated solution passage 43a has a rare state. A valve opening / closing operation is performed to keep both the dilute solution moving valve 52b in the solution passage 43b and the condensed water moving valve 53 in the refrigerant passage 42 closed. In the evaporation unit 10, the LiBr aqueous solution in the container 11 is heated (boiling) by exhaust heat from the heating element 90 (heat radiating unit 91), so that the refrigerant (water) is actively evaporated from the LiBr aqueous solution. Further, since the vapor distribution valve 51 is opened, the evaporated refrigerant vapor (high temperature water vapor) passes through the separation section 14 (hole 14a), and then flows through the vapor passage 41 in the direction of the arrow P, thereby condensing the section 20. Supplied to. Therefore, as the refrigerant evaporates, the volume of the LiBr aqueous solution in the container 11 gradually decreases, and the liquid level of the LiBr aqueous solution decreases. Further, in the condensing unit 20, heat exchange between the outside air and the refrigerant vapor is achieved through cooling water that circulates (circulates) in the heat exchange unit 60. Thereby, the heat of the refrigerant vapor is radiated to the atmosphere (outside air), and the refrigerant vapor is returned to the condensed water and sequentially stored in the container 21.

  Here, when the liquid level of the LiBr aqueous solution in the container 11 is lowered to the position of the liquid level detection sensor 12 (see FIG. 2), the valve controller 70 switches the steam flow valve 51 from the open state to the closed state. At the same time, the concentrated solution moving valve 52a is switched from the closed state to the open state. That is, in the first embodiment, when the concentration of the LiBr aqueous solution rises to a predetermined value as the liquid level of the LiBr aqueous solution decreases due to the evaporation of the refrigerant, the vapor circulation valve 51 is switched to the closed state and the concentrated solution moves. The service valve 52a is switched to the open state. Thereby, the heat transfer system 100 is shifted from the operation state (state 1) to the operation state (state 2) shown in FIG.

  In the operation state (state 2) shown in FIG. 3, the LiBr aqueous solution (concentrated solution) in the evaporator 10 flows in the concentrated solution passage 43a in the direction of arrow Q by the pressure of the refrigerant vapor in the container 11 and the vapor passage 41. It is pushed out to the suction part 30. At this time, when the cooling unit 80 is driven, the LiBr aqueous solution (concentrated solution) flowing through the concentrated solution passage 43a is moved to the suction unit 30 in a state in which the temperature is lowered by being slightly cooled by the cooling unit 80. The Thus, in the first embodiment, a part of the LiBr aqueous solution (concentrated solution) of the evaporation unit 10 is smoothly moved to the suction unit 30 through the concentrated solution passage 43a using the pressure of the refrigerant vapor, The LiBr aqueous solution (concentrated solution) moved to the suction unit 30 has a lower liquid temperature than the LiBr aqueous solution (concentrated solution) stored in the evaporation unit 10. Therefore, the internal pressure of the suction part 30 (container 31) containing the LiBr aqueous solution (concentrated solution) is lower than the internal pressure of the evaporation part 10 (container 11). Further, the internal pressure of the suction unit 30 in which the LiBr aqueous solution (concentrated solution) is accommodated is lower than the internal pressure of the condensing unit 20 (container 21) filled with refrigerant vapor (high-temperature steam).

  Thereafter, in the first embodiment, when the liquid level of the LiBr aqueous solution moved from the evaporation unit 10 to the suction unit 30 reaches the position of the liquid level detection sensor 13 in the container 11 (see FIG. 4), the valve control unit 70, the concentrated solution transfer valve 52a is switched from the open state to the closed state. Further, the valve controller 70 switches the condensed water transfer valve 53 of the refrigerant passage 42 from the closed state to the open state. Thereby, the heat transfer system 100 is shifted from the operation state (state 2) to the operation state (state 3) shown in FIG.

  In the driving operation state (state 3) shown in FIG. 4, the internal pressure of the suction unit 30 in which the LiBr aqueous solution (concentrated solution) is accommodated is lower than the internal pressure of the condensing unit 20. Using the difference, the refrigerant condensed in the condensing unit 20 is sucked into the sucking unit 30 in which the LiBr aqueous solution (concentrated solution) is accommodated. That is, in the first embodiment, the refrigerant (condensed water) in the condensing unit 20 flows in the refrigerant passage 42 in the direction of the arrow P using the pressure difference between the internal pressure of the suction unit 30 and the internal pressure of the condensing unit 20. It is smoothly moved to 30 and mixed with the LiBr aqueous solution (concentrated solution). Thereby, in the suction part 30, the LiBr aqueous solution (concentrated solution) is diluted with the refrigerant (condensed water) and changed to the LiBr aqueous solution (diluted solution). In addition, along with this, the liquid level of the LiBr aqueous solution in the container 31 further rises and is much higher than the liquid level height (position of the liquid level detection sensor 13) of the LiBr aqueous solution (concentrated solution) remaining in the evaporation unit 10. To be high.

  Thereafter, in the first embodiment, when the LiBr aqueous solution moved from the condensing unit 20 to the suction unit 30 reaches a predetermined liquid level in the container 31, the valve control unit 70 causes the steam flow valve 51 and Both dilute solution transfer valves 52b are switched from the closed state to the open state. Further, the concentrated solution transfer valve 52a is kept closed. As a result, the heat transfer system 100 is shifted from the operation state (state 3) to the operation state (state 4) shown in FIG.

  In the operation state (state 4) shown in FIG. 5, since the liquid level height of the LiBr aqueous solution (dilute solution) in the suction unit 30 is higher than the liquid level height of the LiBr aqueous solution (concentrated solution) in the evaporation unit 10, suction is performed. The LiBr aqueous solution (dilute solution) of the suction unit 30 is obtained by utilizing the fact that the liquid level of the unit 30 is higher than the liquid level of the evaporation unit 10 (the liquid level difference between the suction unit 30 and the evaporation unit 10). The dilute solution passage 43b flows in the direction of arrow P and is moved to the evaporation unit 10. Therefore, the state of the LiBr aqueous solution (concentrated solution) in the evaporation unit 10 is returned to the LiBr aqueous solution (dilute solution) as the liquid level rises. Further, when the LiBr aqueous solution is returned from the suction unit 30 to the evaporation unit 10, the vapor circulation valve 51 is opened, so that the refrigerant vapor is pushed out to the vapor passage 41 as the liquid level rises in the container 11 and is condensed. 20 is supplied. When the LiBr aqueous solution (dilute solution) in the evaporation unit 10 reaches a predetermined liquid level above the position of the liquid level detection sensor 12, the valve control unit 70 opens the dilute solution moving valve 52b. To the closed state (see FIG. 2).

  Thereafter, the LiBr aqueous solution (diluted solution) in the evaporation unit 10 is heated again by the exhaust heat of the heating element 90, whereby the refrigerant (water) is evaporated from the LiBr aqueous solution. Further, as shown in FIG. 2, the valve control unit 70 keeps the steam flow valve 51 of the steam passage 41 open, while the concentrated solution transfer valve 52a of the concentrated solution passage 43a and the diluted solution passage 43b are diluted. Control is performed to keep both the solution transfer valve 52b and the condensed water transfer valve 53 of the refrigerant passage 42 closed. Then, the operation operations of “state 1 (see FIG. 2)”, “state 2 (see FIG. 3)”, “state 3 (see FIG. 4)”, and “state 4 (see FIG. 5)” described above are sequentially repeated. It is. Thereby, the exhaust heat of the heating element 90 is moved to the condensing unit 20 via the refrigerant and radiated from the condensing unit 20 to the atmosphere (outside air). Therefore, heat is steadily taken away from the heating element 90 (heat radiation part 91), and the heating element 90 is maintained at a predetermined temperature.

  In the first embodiment, as described above, the vapor distribution valve 51 provided in the vapor passage 41 that connects the evaporation unit 10 and the condensation unit 20, and the concentrated solution passage that connects the evaporation unit 10 and the suction unit 30. And when the concentration of the LiBr aqueous solution (concentrated solution) in the evaporating section 10 rises to a predetermined value, the vapor distribution valve 51 is closed to concentrate the concentrated solution moving valve 52a provided in 43a. By opening the solution transfer valve 52a, the LiBr aqueous solution (concentrated solution) in the evaporation unit 10 is moved to the suction unit 30 by the pressure of the refrigerant vapor, and is condensed using the internal pressure difference between the suction unit 30 and the condensation unit 20. By configuring the refrigerant condensed in the unit 20 to be sucked into the suction unit 30, the evaporation unit uses the pressure of the refrigerant vapor based on the opening / closing operation of the vapor distribution valve 51 and the concentrated solution transfer valve 52a. 10 LiBr water The liquid (concentrated solution) is smoothly moved to the suction unit 30 in advance, and the refrigerant (liquid refrigerant) of the condensing unit 20 is converted into an LiBr aqueous solution (concentrated solution) using the internal pressure difference between the suction unit 30 and the condensing unit 20. Can be smoothly sucked into the suction part 30 in which the refrigerant is stored and the refrigerant can be mixed with the LiBr aqueous solution (concentrated solution). That is, unlike the case where a relatively low concentration refrigerant (liquid refrigerant) is gradually moved through the osmotic membrane and moved to the relatively high concentration LiBr aqueous solution (concentrated solution) side over time, suction is performed. Since the refrigerant (liquid refrigerant) of the condensing unit 20 is smoothly sucked into the suction unit 30 using the internal pressure difference between the unit 30 and the condensing unit 20, the solution (concentrated solution) of the suction unit 30 is not required in time. The LiBr aqueous solution (concentrated solution) can be diluted by mixing the refrigerant (liquid refrigerant). As a result, the heat transfer system 100 can be quickly started up. Further, unlike the case where an osmotic membrane (osmotic pressure) is used, the flow rate of the refrigerant is not limited by utilizing the internal pressure difference between the suction unit 30 and the condensing unit 20, so that the heat transfer system is increased by increasing the refrigerant circulation rate. The cooling capacity of 100 can be further improved.

  Moreover, in 1st Embodiment, the condensate water movement valve 53 provided in the refrigerant path 42 which connects the condensation part 20 and the suction part 30 is provided, and LiBr aqueous solution (concentrated solution) of the evaporation part 10 is in the suction part 30. After the transfer, the concentrated solution transfer valve 52a is closed and the condensed water transfer valve 53 is opened, so that the refrigerant condensed in the condensing unit 20 is sucked using the internal pressure difference between the suction unit 30 and the condensing unit 20. The unit 30 is configured to be sucked. As described above, after the LiBr aqueous solution (concentrated solution) in the evaporation unit 10 is moved to the suction unit 30, the suction unit 30 and the condensing unit 20 are based on the opening / closing operations of the concentrated solution moving valve 52a and the condensed water moving valve 53. The refrigerant (liquid refrigerant) of the condensing unit 20 is sucked through the refrigerant passage 42 into the suction unit 30 in which the LiBr aqueous solution (concentrated solution) is stored by using the internal pressure difference between the refrigerant and the LiBr aqueous solution (concentrated solution). Can be mixed. That is, the concentrated solution moving valve 52a is utilized by utilizing the internal pressure difference between the suction unit 30 and the condensing unit 20 without providing a liquid feed pump that mechanically pumps the refrigerant (liquid refrigerant) of the condensing unit 20 to the suction unit 30. Based on the opening / closing operation of the condensed water transfer valve 53, smooth circulation of the refrigerant (liquid refrigerant) from the condensing unit 20 to the suction unit 30 can be easily obtained. Further, since a liquid feed pump or the like is not necessary, the power consumption of the heat transfer system 100 can be suppressed as much as possible.

  In the first embodiment, after the refrigerant condensed in the condensing unit 20 is sucked into the suction unit 30, the solution in the suction unit 30 is changed by opening the vapor circulation valve 51 and the dilute solution moving valve 52b. It is configured to be moved to the evaporation unit 10 due to a liquid level difference between the suction unit 30 and the evaporation unit 10. Thus, after the refrigerant (liquid refrigerant) of the condensing unit 20 is sucked into the suction unit 30 and mixed with the LiBr aqueous solution (concentrated solution), based on the opening / closing operation of the steam flow valve 51 and the dilute solution moving valve 52b. Since the solution of the suction unit 30 that has become a dilute solution can be easily returned to the evaporation unit 10 using the liquid level difference, the evaporation unit 10 evaporates the solution (dilute liquid) to obtain the refrigerant vapor again. be able to. That is, based on the opening / closing operations of the steam flow valve 51, the concentrated solution transfer valve 52a, the dilute solution transfer valve 52b, and the condensed water transfer valve 53, the regeneration process of the refrigerant vapor in the evaporation unit 10, the regenerated refrigerant vapor A condensation (liquefaction) process in the condensation unit 20, a movement process of the LiBr aqueous solution (concentrated solution) from the evaporation unit 10 to the suction unit 30, a dilution process of the LiBr aqueous solution (concentrated solution) by the refrigerant (liquid refrigerant) in the suction unit 30, Since the process of re-supplying the diluted solution to the evaporation unit 10 can be continuously repeated in this order, the heat transfer system 100 can be driven with smooth circulation of the refrigerant.

  Further, the first embodiment includes a valve control unit 70 that performs opening / closing control of the steam flow valve 51, the concentrated solution transfer valve 52a, the diluted solution transfer valve 52b, and the condensed water transfer valve 53. When the refrigerant evaporates and the concentration of the LiBr aqueous solution (concentrated solution) in the evaporating unit 10 rises to a predetermined value, the valve control unit 70 closes the vapor flow valve 51 and opens the concentrated solution moving valve 52a. And the LiBr aqueous solution (concentrated solution) in the evaporation unit 10 is moved to the suction unit 30 by the pressure of the refrigerant vapor, and then the concentrated solution moving valve 52a is closed by the valve control unit 70 and the condensed water moving valve 53 is moved. The opening control is performed, and the refrigerant in the condensing unit 20 is sucked into the sucking unit 30 by utilizing the internal pressure difference between the suction unit 30 and the condensing unit 20, and then the vapor control valve 51 and the dilute solution movement are performed by the valve control unit 70. By performing control to open the valve 52b, the solution in the suction unit 30 is moved to the evaporation unit 10 due to the liquid level difference between the suction unit 30 and the evaporation unit 10. Thus, the valve control unit 70 is used to perform opening / closing operations of the steam flow valve 51, the concentrated solution transfer valve 52a, the dilute solution transfer valve 52b, and the condensed water transfer valve 53 based on a predetermined timing. The refrigerant vapor regeneration process in the evaporation unit 10, the condensed (liquefaction) process of the regenerated refrigerant vapor in the condensing unit 20, the dilution process of the LiBr aqueous solution (concentrated solution) with the refrigerant (liquid refrigerant) in the suction unit 30, dilution The process of resupplying the solution to the evaporation unit 10 can be repeated without limiting the amount of refrigerant circulation.

  Moreover, in 1st Embodiment, LiBr aqueous solution (concentrated solution) of the evaporation part 10 is moved to the suction part 30 accompanying a temperature fall, and the internal pressure of the suction part 30 is reduced and LiBr aqueous solution (concentrated solution) is made. The refrigerant condensed in the condensing unit 20 due to the pressure difference between the internal pressure of the accommodated suction unit 30 and the internal pressure of the condensing unit 20 is configured to be sucked into the suction unit 30. As a result, the internal pressure of the suction unit 30 to which the LiBr aqueous solution (concentrated solution) is moved along with the temperature drop of the LiBr aqueous solution (concentrated solution) becomes lower than the internal pressure of the condensing unit 20 enclosing the refrigerant vapor. The refrigerant (liquid refrigerant) of the condensing unit 20 can be sucked into the suction unit 30 by effectively utilizing the negative pressure state (low internal pressure state) on the suction unit 30 side with respect to the condensing unit 20. Therefore, the heat transfer system 100 can be configured without providing a liquid feed pump that mechanically pumps the refrigerant (liquid refrigerant) of the condensing unit 20 to the suction unit 30.

  Further, in the first embodiment, the temperature of the LiBr aqueous solution (concentrated solution) that is provided in the concentrated solution passage 43 a that connects the evaporation unit 10 and the suction unit 30 and is moved from the evaporation unit 10 to the suction unit 30 is condensed. A cooling unit 80 for reducing the refrigerant vapor below the condensation temperature of the unit 20 is provided. Thereby, the temperature of the LiBr aqueous solution (concentrated solution) moved from the evaporation unit 10 to the suction unit 30 is reliably lowered by the cooling unit 80 to be lower than the condensation temperature of the refrigerant vapor in the condensation unit 20. The internal pressure can be easily reduced below the internal pressure of the condensing unit 20 in which the refrigerant vapor is sealed. Thereby, the refrigerant | coolant (liquid refrigerant) of the condensation part 20 can be reliably attracted | sucked by the suction part 30. FIG.

  Further, in the first embodiment, the refrigerant passage 42 that connects the condensing unit 20 and the suction unit 30 is provided, and the connection portion 42 a between the condensing unit 20 and the refrigerant passage 42 is connected to the refrigerant passage 42 and the suction unit 30. It arrange | positions below rather than the connection part 42b. As described above, even when the refrigerant passage 42 has an upward gradient from the condensing unit 20 toward the suction unit 30, the refrigerant (liquid refrigerant) of the condensing unit 20 is caused by the internal pressure difference between the suction unit 30 and the condensing unit 20. ) Can be sucked into the suction unit 30 in which the LiBr aqueous solution (concentrated solution) is stored, and therefore, it is constrained by the necessity of disposing the suction unit 30 below the condensing unit 20 (making the refrigerant passage 42 downward slope). The heat transfer system 100 can be configured by arranging the suction unit 30 and the condensing unit 20 without any problem.

  In the first embodiment, the LiBr aqueous solution (concentrated solution) after evaporation of the refrigerant is sucked from the condensing unit 20 in the concentrated solution passage 43 a for moving the evaporation unit 10 to the suction unit 30 and the suction unit 30. The evaporating unit 10 and the sucking unit 30 are connected to each other by a dilute solution passage 43b for moving the dilute solution in which the LiBr aqueous solution (concentrated solution) is diluted by the refrigerant from the suction unit 30 to the evaporating unit 10. A concentrated solution transfer valve 52a is provided in the concentrated solution passage 43a, and a diluted solution transfer valve 52b is provided in the diluted solution passage 43b. Thus, a concentrated solution passage 43a that opens and closes the concentrated solution moving valve 52a to flow LiBr aqueous solution (concentrated solution), and a diluted solution passage 43b that opens and closes the diluted solution moving valve 52b to flow diluted solution. Are separately provided, the concentrated solution passage 43a and the dilute solution passage 43b can be arranged in an optimum form between the evaporation section 10 and the suction section 30, respectively. Thereby, smooth distribution | circulation with a concentrated solution and the dilute solution containing a refrigerant | coolant can be aimed at.

  Further, in the first embodiment, the refrigerant vapor and the LiBr aqueous solution (concentrated solution) are formed by smoothly passing the refrigerant vapor evaporated in the evaporation unit 10 and having a hole that does not allow the LiBr aqueous solution (concentrated solution) to pass through. A separation unit 14 for separating the two is disposed. Thereby, it can suppress effectively that LiBr aqueous solution (concentrated solution) of the evaporation part 10 distribute | circulates the vapor | steam channel | path 41 with the refrigerant | coolant vapor | steam, and is mixed in the condensation part 20. FIG. Thereby, the refrigerant | coolant condensing operation | movement in the condensation part 20 can be performed in the state which isolate | separated the refrigerant | coolant (refrigerant vapor | steam) from LiBr aqueous solution (concentrated solution) reliably. As a result, the heat transfer system 100 can be driven in a more normal state.

  In the first embodiment, the evaporating unit 10, the suction unit 30, and the condensing unit 20 are mounted on a vehicle such as a passenger car, a bus, and a truck, and the exhaust heat of the heating element 90 of the vehicle such as the passenger car, the bus, and the truck. Is transmitted to the refrigerant vapor evaporated in the evaporation unit 10, and is radiated to the outside in the condensing unit 20. In this way, the heat (exhaust heat) of the heating element 90 provided in the vehicle is efficiently transferred to the external environment (heat dissipation) using the heat transfer system 100 capable of quickly starting the system and improving the cooling capacity. Can be made.

(Second Embodiment)
The second embodiment will be described with reference to FIGS. 1 and 6 to 10. In the second embodiment, unlike the first embodiment, an example in which the evaporation unit 10 and the suction unit 30 are connected using one solution passage 243 will be described. In the figure, components similar to those in the first embodiment are denoted by the same reference numerals as those in the first embodiment.

  In the heat transfer system 200 according to the second embodiment of the present invention, as shown in FIG. 6, instead of the two concentrated solution passages 43a and the diluted solution passage 43b (see FIG. 1) used in the first embodiment, The solution transfer valve 252 is used to connect the evaporation unit 10 and the suction unit 30 using one solution passage 243 and to control the flow direction (arrow P direction or arrow Q direction) of the LiBr aqueous solution in the solution passage 243. Is provided. The solution transfer valve 252 is electrically connected to the valve control unit 70 and is operated based on the valve opening / closing control of the valve control unit 70, thereby having a function of circulating the LiBr aqueous solution in the solution passage 243. Yes. Further, the solution passage 243 includes a cooling unit 280 that lowers the temperature of the LiBr aqueous solution when it is moved from the evaporation unit 10 to the suction unit 30 to be less than the condensation temperature of the refrigerant vapor in the condensing unit 20. The cooling unit 280 has the same configuration as the cooling unit 80 (see FIG. 1). The solution transfer valve 252 is an example of the “second valve” in the present invention.

  Therefore, in the second embodiment, when the refrigerant evaporates and the concentration of the LiBr aqueous solution in the evaporating unit 10 rises to a predetermined value, the vapor flow valve 51 is closed and the solution transfer valve 252 is opened, whereby the refrigerant vapor The LiBr aqueous solution that has become a concentrated solution of the evaporation unit 10 due to the pressure of the gas flows through the solution passage 243 in the direction of the arrow Q and is moved to the suction unit 30. In addition, after the LiBr aqueous solution is moved to the suction unit 30 by a predetermined amount, the solution transfer valve 252 is closed and the condensed water transfer valve 53 is opened, thereby utilizing the internal pressure difference between the suction unit 30 and the condensation unit 20. Then, the liquid refrigerant (condensed water) condensed in the condensing unit 20 flows through the refrigerant passage 42 in the direction of the arrow P and is sucked into the suction unit 30. And after the refrigerant | coolant condensed by the condensation part 20 was attracted | sucked by the suction | inhalation part 30, the dilute solution of the suction | inhalation part 30 was obtained by opening the vapor | steam distribution valve 51 and the solution movement valve 252 at a predetermined timing. The LiBr aqueous solution flows through the solution passage 243 in the direction of arrow P and is moved to the evaporation unit 10. Thus, in the second embodiment, the movement of the LiBr aqueous solution (concentrated solution) from the evaporation unit 10 to the suction unit 30 and the movement of the LiBr aqueous solution (dilute solution) from the suction unit 30 to the evaporation unit 10 are common. The solution passage 243 is used. In addition, the other structure of the heat transfer system 200 is the same as that of the said 1st Embodiment.

  Next, the operation of the heat transfer system 200 will be described with reference to FIGS.

  First, in the operation operation state (state 1) shown in FIG. 7, the valve control unit 70 opens the steam flow valve 51 of the steam passage 41 while the solution movement valve 252 and the refrigerant passage 42 of the solution passage 243. The valve opening and closing operation is performed to keep both the condensed water transfer valves 53 closed. And in the evaporation part 10, the LiBr aqueous solution in the container 11 is heated (boiling) with the exhaust heat from the heat generating body 90 (heat radiation part 91), and a refrigerant | coolant (water) evaporates. Further, since the steam circulation valve 51 is opened, the evaporated high temperature steam flows through the steam passage 41 in the direction of arrow P and is supplied to the condensing unit 20. In the condensing unit 20, heat exchange between the outside air and the refrigerant vapor is achieved through the cooling water flowing in the heat exchange unit 60, and the heat of the refrigerant vapor is radiated to the atmosphere (outside air) and the refrigerant vapor is condensed. It is returned to water and stored in the container 21 sequentially.

  Here, when the liquid level of the LiBr aqueous solution in the container 11 drops to the position of the liquid level detection sensor 12 (see FIG. 6), the valve controller 70 switches the steam flow valve 51 from the open state to the closed state. In addition, the solution transfer valve 252 is switched from the closed state to the open state. That is, also in the second embodiment, when the concentration of the LiBr aqueous solution increases to a predetermined value as the liquid level of the LiBr aqueous solution decreases due to the evaporation of the refrigerant, the vapor circulation valve 51 is switched to the closed state and the solution moving solution is used. Valve 252 is switched to the open state. As a result, the heat transfer system 200 is shifted from the operation state (state 1) to the operation state (state 2) shown in FIG.

  In the driving operation state (state 2) shown in FIG. 8, the LiBr aqueous solution (concentrated solution) in the evaporation section 10 flows through the solution passage 243 in the direction of the arrow Q due to the pressure of the refrigerant vapor in the container 11 and the vapor passage 41 and sucked. It is pushed out to the part 30. At this time, when the cooling unit 280 is driven, the LiBr aqueous solution (concentrated solution) flowing through the solution passage 243 is moved to the suction unit 30 with the temperature slightly lowered. As described above, also in the second embodiment, a part of the LiBr aqueous solution (concentrated solution) of the evaporation unit 10 is smoothly moved to the suction unit 30 through the solution passage 243 using the pressure of the refrigerant vapor, and suction is performed. The LiBr aqueous solution (concentrated solution) moved to the unit 30 has a lower liquid temperature than the LiBr aqueous solution (concentrated solution) stored in the evaporation unit 10. Therefore, the internal pressure of the suction unit 30 in which the LiBr aqueous solution (concentrated solution) is accommodated is lower than the internal pressure of the evaporation unit 10. Moreover, the internal pressure of the suction part 30 in which the LiBr aqueous solution (concentrated solution) is accommodated is lower than the internal pressure of the condensing part 20 filled with high-temperature steam.

  Thereafter, in the second embodiment, when the LiBr aqueous solution moved from the evaporation unit 10 to the suction unit 30 reaches the position of the liquid level detection sensor 13 in the container 11 (see FIG. 9), the valve control unit 70 The solution transfer valve 252 is switched from the open state to the closed state. Further, the valve controller 70 switches the condensed water transfer valve 53 of the refrigerant passage 42 from the closed state to the open state. As a result, the heat transfer system 200 is shifted from the operation state (state 2) to the operation state (state 3) shown in FIG.

  In the driving operation state (state 3) shown in FIG. 9, since the internal pressure of the suction unit 30 in which the LiBr aqueous solution (concentrated solution) is accommodated is lower than the internal pressure of the condensation unit 20, the internal pressure between the suction unit 30 and the condensation unit 20 Using the difference, the refrigerant condensed in the condensing unit 20 is sucked into the sucking unit 30 in which the LiBr aqueous solution (concentrated solution) is accommodated. That is, also in the second embodiment, the refrigerant (condensed water) of the condensing unit 20 flows through the refrigerant passage 42 in the direction of arrow P and sucks using the pressure difference between the internal pressure of the suction unit 30 and the internal pressure of the condensing unit 20. It is smoothly moved to the unit 30 and mixed with the LiBr aqueous solution (concentrated solution). Thereby, in the suction part 30, the LiBr aqueous solution (concentrated solution) is diluted with the refrigerant (condensed water) and changed to the LiBr aqueous solution (diluted solution). In addition, along with this, the liquid level of the LiBr aqueous solution in the container 31 further rises and is much higher than the liquid level height (position of the liquid level detection sensor 13) of the LiBr aqueous solution (concentrated solution) remaining in the evaporation unit 10. To be high.

  Thereafter, in the second embodiment, when the LiBr aqueous solution moved from the condensing unit 20 to the suction unit 30 reaches a predetermined liquid level in the container 31, the valve control unit 70 causes the steam circulation valve 51 and Both the solution transfer valves 252 are switched from the closed state to the open state. As a result, the heat transfer system 200 is shifted from the operation state (state 3) to the operation state (state 4) shown in FIG.

  In the operation state (state 4) shown in FIG. 10, since the liquid level height of the LiBr aqueous solution (dilute solution) in the suction unit 30 is higher than the liquid level height of the LiBr aqueous solution (concentrated solution) in the evaporation unit 10, suction is performed. Due to the liquid level difference between the part 30 and the evaporation part 10, the LiBr aqueous solution (dilute solution) in the suction part 30 flows through the solution passage 243 in the direction of arrow P and is moved to the evaporation part 10. Therefore, the state of the LiBr aqueous solution (concentrated solution) in the evaporation unit 10 is returned to the LiBr aqueous solution (dilute solution) as the liquid level increases. Further, when the LiBr aqueous solution is returned from the suction unit 30 to the evaporation unit 10, the vapor circulation valve 51 is opened, so that the refrigerant vapor is pushed out to the vapor passage 41 as the liquid level rises in the container 11 and is condensed. 20 is supplied. Then, when the LiBr aqueous solution (dilute solution) in the evaporation unit 10 reaches a predetermined liquid level above the position of the liquid level detection sensor 12, the valve control unit 70 causes the solution transfer valve 252 to move from the open state. It is switched to the closed state (see FIG. 7).

  Thereafter, the LiBr aqueous solution (diluted solution) in the evaporation unit 10 is heated again by the exhaust heat of the heating element 90, whereby the refrigerant (water) is evaporated from the LiBr aqueous solution. As shown in FIG. 7, the valve control unit 70 opens the steam flow valve 51 of the steam passage 41 while the solution transfer valve 252 of the solution passage 243 and the condensed water transfer valve of the refrigerant passage 42. A valve opening / closing operation is performed to keep both the valves 53 closed. Then, the above-described driving operations of “state 1 (see FIG. 7)”, “state 2 (see FIG. 8)”, “state 3 (see FIG. 9)” and “state 4 (see FIG. 10)” are repeated sequentially. It is. Thereby, the exhaust heat of the heating element 90 is moved to the condensing unit 20 via the refrigerant and radiated from the condensing unit 20 to the atmosphere (outside air). Therefore, heat is steadily taken away from the heating element 90 (heat radiation part 91), and the heating element 90 is maintained at a predetermined temperature.

  In the second embodiment, as described above, the evaporation section 10 and the suction section 30 are connected only by the solution passage 243, and the LiBr aqueous solution (concentrated solution) is moved from the evaporation section 10 to the suction section 30 through the solution passage 243. At the same time, it is used as a common solution passage for moving the LiBr aqueous solution (dilute solution) from the suction unit 30 to the evaporation unit 10. A solution movement valve 252 is provided in the solution passage 243. As a result, one solution transfer valve 252 is opened and closed to move the LiBr aqueous solution (concentrated solution) from the evaporation unit 10 to the suction unit 30 via the solution passage 243, and then from the evaporation unit 10 to the suction unit 30. And LiBr aqueous solution (dilute solution) can be moved through the same solution passage 243. Thus, since the heat transfer system 200 can be operated using the single solution transfer valve 252 and the solution passage 243, the configuration of the heat transfer system 200 can be simplified. The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first embodiment, an example in which the cooling unit 80 is provided in the middle of the concentrated solution passage 43a and the temperature of the LiBr aqueous solution (concentrated solution) moved from the evaporation unit 10 to the suction unit 30 is reduced by heat radiation to the atmosphere. However, the present invention is not limited to this. For example, the concentrated solution passage 43a and the suction unit 30 may be connected using a capillary having a predetermined length without providing such a cooling unit 80. By causing the LiBr aqueous solution to flow through the capillary by the pressure of the refrigerant vapor, the LiBr aqueous solution is ejected into the suction unit 30 with a predetermined flow rate. The temperature of the LiBr aqueous solution (concentrated solution) can be slightly lowered (about 2K to about 3K) with the pressure drop during the ejection. Even with a simpler configuration using a capillary, the temperature of the LiBr aqueous solution (concentrated solution) moved from the evaporation unit 10 to the suction unit 30 can be reliably lowered below the condensation temperature of the refrigerant vapor in the condensation unit 20.

  In the first embodiment, the cooling unit 80 is provided between the concentrated solution moving valve 52a of the concentrated solution passage 43a and the suction unit 30, but the present invention is not limited thereto. For example, the cooling unit 80 may be provided between the evaporation unit 10 of the concentrated solution passage 43a and the concentrated solution moving valve 52a. In the second embodiment, the cooling unit 280 is provided between the solution movement valve 252 and the suction unit 30 in the solution passage 243. However, the present invention is not limited to this. For example, a cooling unit 280 may be provided between the evaporation unit 10 of the solution passage 243 and the solution transfer valve 252.

  In the first and second embodiments, the heat (exhaust heat) of the heating element 90 is simply radiated to the outside air (external environment) via the condenser 20 (heat exchange unit 60). The present invention is not limited to this. For example, as in the modification shown in FIG. 11, the heat (exhaust heat) of the heating element 90 is moved to the condensing unit 20 by connecting the condensing unit 20 and another heat utilization device 65, and then this heat You may comprise so that it may utilize as a heat source of the utilization device 65. FIG. For example, the condensing unit 20 and an air heat exchanger for in-vehicle air conditioning as an example of the heat utilization device 65 are connected to reuse the heat of the heating element 90 as a heat source (hot air) for in-vehicle air conditioning. Alternatively, it may be used as a heat source of a heater (heater) as an example of the heat utilization device 65 provided in the vehicle.

  In the first and second embodiments, the connection portion 42a between the condensing unit 20 and the refrigerant passage 42 is shown below as an example of the connection portion 42b between the refrigerant passage 42 and the suction portion 30. The present invention is not limited to this. The connecting portion 42a between the condensing unit 20 and the refrigerant passage 42 may be disposed above the connecting portion 42b between the refrigerant passage 42 and the suction portion 30, or may be disposed at the same height position.

  Moreover, in the said 1st and 2nd embodiment, although the example which provided the flat separation part 14 which has the some hole 14a inside the container 11 of the evaporation part 10 was shown, this invention is not limited to this. For example, the “separation part” of the present invention may be configured by providing a plurality of elongated slit-like through holes in the flat plate having an opening width that allows the refrigerant vapor to pass smoothly and the short side not to pass the LiBr aqueous solution. The “separation part” may be configured by further providing a plurality of baffle plates extending obliquely downward toward the liquid surface of the solution on the lower surface of the flat plate having such through holes. The refrigerant vapor containing the boiling LiBr aqueous solution collides with the baffle plate before passing through the through hole (slit), so that the LiBr aqueous solution is separated from the refrigerant vapor and easily dropped into the container 11 through the baffle plate. it can.

  Moreover, in the said 1st and 2nd embodiment, although the example which provided the separation part 14 inside the container 11 of the evaporation part 10 was shown, this invention is not limited to this. That is, the separation unit 14 may not be provided inside the container 11.

  In the first and second embodiments, the “heat transfer system” of the present invention is applied to a cooling system for the heating element 90 provided in a vehicle such as a passenger car, a bus, and a truck. Is not limited to this. For example, you may apply to cooling systems, such as a train and a ship provided with internal combustion engines, such as a diesel engine as a heat generating body.

In the first and second embodiments, an example in which an aqueous solution of lithium bromide (LiBr) is used as a solution having a water absorbing action has been described. However, the present invention is not limited to this. A lithium chloride (LiCl) aqueous solution, a calcium chloride (CaCl ₂ ) aqueous solution, or the like may be used as a solution having a water absorbing action (hygroscopic action). The LiCl aqueous solution and the CaCl ₂ aqueous solution are examples of the “solution” of the present invention.

  Moreover, in the said 1st and 2nd embodiment, although shown about the example using water as a refrigerant | coolant, this invention is not limited to this. For example, liquid alcohol may be used as the refrigerant.

DESCRIPTION OF SYMBOLS 10 Evaporation part 12, 13 Liquid level detection sensor 14 Separation part 14a Hole 20 Condensing part 30 Suction part 41 Vapor path 42 Refrigerant path 42a Connection part (connection part of a condensation part and a refrigerant path)
42b Connection portion (connection portion between refrigerant passage and suction portion)
43a Concentrated solution passage (first solution passage)
43b Dilute solution passage (second solution passage)
51 Steam distribution valve (first valve)
52a Concentrated solution transfer valve (second valve)
52b Dilute solution transfer valve (second valve)
53 Condensate transfer valve (third valve)
65 Heat utilization device 80, 280 Cooling unit 70 Valve control unit 100, 200 Heat transfer system 243 Solution passage 252 Solution transfer valve (second valve)

Claims (10)

An evaporating section for evaporating the refrigerant absorbed in the solution;
A suction part for containing the solution;
A condensing unit for condensing the refrigerant vapor evaporated in the evaporating unit;
A first valve provided in a steam passage connecting the evaporator and the condenser;
A second valve provided in a solution passage connecting the evaporation unit and the suction unit;
When the refrigerant evaporates and the concentration of the solution in the evaporation section rises to a predetermined value, the first valve is closed and the second valve is opened to open the second valve by the pressure of the refrigerant vapor. The solution is moved to the suction part, and the refrigerant condensed in the condensing part is sucked into the sucking part using an internal pressure difference between the suction part and the condensing part. , Heat transfer system. A third valve provided in a refrigerant passage connecting the condensing unit and the suction unit;
After the solution in the evaporation section is moved to the suction section, the second valve is closed and the third valve is opened, thereby utilizing the internal pressure difference between the suction section and the condensation section. The heat transfer system according to claim 1, wherein the refrigerant condensed in the condensing unit is configured to be sucked into the suction unit.   After the refrigerant condensed in the condensing part is sucked into the sucking part, the first valve and the second valve are opened, so that the solution in the sucking part becomes the sucking part and the evaporation part The heat transfer system according to claim 2, wherein the heat transfer system is configured to be moved to the evaporating unit by a liquid level difference between the heat transfer system and the evaporator. A valve control unit that controls opening and closing of the first valve, the second valve, and the third valve;
When the refrigerant evaporates and the concentration of the solution in the evaporating unit rises to a predetermined value, the valve control unit performs control to close the first valve and open the second valve. The solution in the evaporation unit is moved to the suction unit by the pressure of the steam, and then the valve control unit performs control to close the second valve and open the third valve to perform the suction unit and the The refrigerant in the condensing unit is sucked into the suction unit using an internal pressure difference with the condensing unit, and then the valve control unit performs control to open the first valve and the second valve. The heat transfer system according to claim 3, wherein the solution in the suction part is moved to the evaporation part due to a liquid level difference between the suction part and the evaporation part.   The solution in the evaporation unit is moved to the suction unit with a decrease in temperature, thereby reducing the internal pressure of the suction unit by reducing the internal pressure of the suction unit and the internal pressure of the condensation unit. The heat transfer system according to claim 1, wherein the refrigerant condensed in the condensing unit due to a pressure difference is sucked into the suction unit.   Provided in the solution passage connecting the evaporating unit and the suction unit, the temperature of the solution when being moved from the evaporating unit to the suction unit is lowered below the condensing temperature of the refrigerant vapor in the condensing unit The heat transfer system according to claim 5, further comprising a cooling unit. A refrigerant passage connecting the condensing unit and the suction unit is provided;
The heat transfer system according to claim 5 or 6, wherein a connection portion between the condensing unit and the refrigerant passage is disposed below a connection portion between the refrigerant passage and the suction portion. The solution passage includes a first solution passage for moving the concentrated solution after evaporation of the refrigerant from the evaporation section to the suction section, and the concentrated solution by the refrigerant sucked from the condensation section in the suction section. A second solution passage for moving the diluted diluted solution from the suction part to the evaporation part,
The second valve according to claim 1, wherein the second valve includes a concentrated solution transfer valve provided in the first solution passage and a dilute solution transfer valve provided in the second solution passage. The heat transfer system according to item.   The separation part which isolate | separates the said refrigerant | coolant vapor | steam and the said solution is arrange | positioned by having a hole of a magnitude | size which does not allow the said refrigerant | coolant vapor | steam evaporated by the said evaporation part to pass smoothly. The heat transfer system according to any one of 1 to 8. The evaporation unit, the suction unit and the condensing unit are mounted on a vehicle,
At least one exhaust heat of the vehicle engine, motor, battery, and heat accumulator is transmitted to the refrigerant vapor evaporated in the evaporation unit, and is radiated to the outside in the condensation unit, or a heat source of the heat utilization device. The heat transfer system according to any one of claims 1 to 9, wherein the heat transfer system is configured to be used as:

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