JP6256170B2 - Adsorption heat pump system and cold heat generation method - Google Patents

Description

  The present invention relates to an adsorption heat pump system and a cold heat generation method.

  As an adsorption heat pump, Patent Document 1 describes a configuration including a pair of adsorbers, a condenser, and an evaporator.

  In the adsorption heat pump having such a configuration, generally, the difference in adsorption amount per adsorbent per cycle can be increased by increasing the temperature difference between adsorption and desorption. By increasing the difference in the amount of adsorption / desorption, cold heat generation can be performed efficiently.

  Further, Non-Patent Document 1 describes that in the adsorption heat pump system, the desorption capability is enhanced by mounting the adsorbers in two stages.

JP 2010-151386 A

2013 Annual Meeting of the Japan Society of Refrigerating and Air Conditioning Engineers "Effect of Adsorber Flow Rate on Output of Adsorption Heat Pump Driven at 50 ° C"

  However, if the temperature difference between adsorption and desorption in the adsorber is large, sensible heat loss (amount of heat that cannot be used for actual energy exchange) increases. In an actual adsorption heat pump, it is desired to obtain cold energy more efficiently. Further, Non-Patent Document 1 only describes that the adsorbers divided into two stages are connected to each other, and it is desired to regenerate the two adsorbers more efficiently. Furthermore, when the adsorbent of the adsorber is regenerated, a high-temperature heat source such as exhaust heat is required, but the high-temperature heat source is also required to be used efficiently.

  This invention considers the said fact and makes it a subject to obtain the adsorption-type heat pump and cold-heat generation method which can produce cold-heat efficiently.

  An adsorption heat pump according to a first aspect of the present invention includes an evaporator that evaporates a heat medium, a main body that is connected to the evaporator and adsorbs the heat medium and desorbs the heat medium at a main regeneration temperature and is first regenerated. An adsorber is connected to the main adsorber, and assist regeneration is performed at the assist regeneration temperature by using steam of the heat medium desorbed from the main adsorber during the first regeneration, and the main regeneration is performed after the first regeneration. A regeneration assist adsorber that adsorbs the heat medium from the adsorber and performs second regeneration of the main adsorber.

In the adsorption heat pump according to the first aspect, cold heat is generated by evaporation of the heat medium in the evaporator. The main adsorber connected to the evaporator adsorbs the evaporated heat medium of the evaporator. The main adsorber is first regenerated by desorbing the heat medium adsorbed at the main regeneration temperature. The regeneration assist adsorber is connected to the main adsorber, and steam from the main adsorber is supplied during the first regeneration. The steam is used for heating the assist adsorber, and the regeneration assist adsorber is assist-regenerated at the assist regeneration temperature. In addition, the regeneration assist adsorber adsorbs the heat medium from the main adsorber after the first regeneration to perform the second regeneration of the main adsorber.

  According to the adsorption heat pump of the first aspect, the relative pressure during the second regeneration can be made smaller than the relative pressure during the first regeneration by regenerating the main adsorber in communication with the regeneration assist adsorber. it can. Therefore, more heat medium can be desorbed from the main adsorber to efficiently generate cold heat.

  In addition, according to the adsorption heat pump according to the first aspect, since the second regeneration of the main adsorber is performed using the regeneration assist adsorber after the first regeneration, it is necessary to perform all regeneration of the main adsorber with the regeneration assist adsorber. There is no. Therefore, the amount of adsorption required for the regeneration assist adsorber can be reduced, and regeneration of the main adsorber can be efficiently assisted with a small capacity regeneration assist adsorber.

  Furthermore, since the regeneration assist adsorber is regenerated (assisted regeneration) using the steam obtained in the first regeneration of the main adsorber, a separate heat source for assist regeneration is not required, and the use amount of the heat source can be reduced. it can.

  In the adsorption heat pump according to a second aspect, the main adsorber includes a first main adsorber and a second main adsorber respectively connected to the evaporator and the regeneration assist adsorber.

According to the adsorption heat pump of the second aspect, since the two main adsorbers are arranged in parallel between the evaporator and the regeneration assist adsorber, the cold generation and regeneration of the two main adsorbers are performed. By performing alternately, it is possible to perform continuous cold heat generation.

In the adsorption heat pump according to claim 3, the first regeneration and the second regeneration of the second main adsorber are performed when the heat medium is adsorbed by the first main adsorber, and the second main adsorber The assist regeneration of the regeneration assist adsorber is performed during the first regeneration, and the first regeneration and the second regeneration of the first main adsorber are performed when the heat medium is adsorbed by the second main adsorber. And the assist regeneration of the regeneration assist adsorber is performed during the first regeneration of the first main adsorber.

According to the adsorption heat pump according to claim 3, continuous cold heat generation can be performed by alternately performing cold heat generation and first regeneration and second regeneration of the first main adsorber and the second main adsorber. it can. Further, the assist regeneration of the regeneration assist adsorber is performed at the first regeneration of the first main adsorber and at the first regeneration of the second main adsorber. Thus, by performing the regeneration of the regeneration assist adsorber, the regeneration assist adsorber can continuously perform the second regeneration of the main adsorber after the one main adsorber is first regenerated. Therefore, the second regeneration of the first main adsorber and the second main adsorber can be performed using one regeneration assist adsorber.

The adsorption heat pump according to claim 4 is characterized in that the main adsorber and the regeneration assist adsorber are connected to a condenser that condenses the heat medium.

According to the adsorption heat pump according to claim 4, the main adsorber and the regeneration assist adsorber are connected to the condenser to condense the heat medium desorbed from the main adsorber and the regeneration assist adsorber, and the evaporator Can be sent to.

According to a fifth aspect of the present invention, there is provided a cold heat generation method in which a heat medium is evaporated by an evaporator to generate cold heat, the heat medium is adsorbed by a main adsorber, and the adsorbed heat medium is absorbed at a main regeneration temperature. To regenerate the main adsorber for the first regeneration, and assist regeneration of the regeneration assist adsorber at the assist regeneration temperature by the vapor of the heat medium desorbed from the main adsorber during the first regeneration,
A heat medium from the main adsorber is adsorbed by the regeneration assist adsorber after the first regeneration, and the main adsorber is second regenerated;
Is.

According to the cold heat generation method according to claim 5, since the main adsorber is secondly regenerated by adsorbing the heat medium from the main adsorber with the regeneration assist adsorber, more heat medium is desorbed from the main adsorber. Can be made. Thus, by using the regeneration assist adsorber, it is possible to efficiently generate cold heat.

  According to the cold heat generation method according to claim 5, since the second regeneration of the main adsorber is performed using the regeneration assist adsorber after the first regeneration, all regeneration of the main adsorber needs to be performed with the regeneration assist adsorber. There is no. Therefore, the amount of adsorption required for the regeneration assist adsorber can be reduced, and regeneration of the main adsorber can be efficiently assisted with a small capacity regeneration assist adsorber.

  Furthermore, since the regeneration assist adsorber is regenerated at the assist regeneration temperature (assist regeneration) using the steam obtained in the first regeneration of the main adsorber, the heat source for assist regeneration is used for the first regeneration of the main adsorber. It can be covered by a heat source, and the amount of heat source used can be reduced.

  The cold heat generation method according to claim 6, wherein the main adsorber includes a first main adsorber and a second main adsorber, and the second main adsorber is generated during the cold heat generation in the first main adsorber. The first regeneration and the second regeneration are performed, and the assist regeneration of the regeneration assist adsorber is performed at the time of the first regeneration of the second main adsorber, and the cold heat is generated at the second main adsorber. The first regeneration and the second regeneration of the first main adsorber are performed, and the assist regeneration of the regeneration assist adsorber is performed at the time of the first regeneration of the first main adsorber.

According to the cold heat generation method according to claim 6, continuous cold heat generation can be performed by alternately performing the cold heat generation of the first main adsorber and the second main adsorber and the first regeneration and the second regeneration. it can. Further, the assist regeneration of the regeneration assist adsorber is performed at the first regeneration of the first main adsorber and at the first regeneration of the second main adsorber. Thus, by performing regeneration of the regeneration assist adsorber, one regeneration assist adsorber can be used for the second regeneration of the first main adsorber and the second main adsorber.

  Since the present invention has the above-described configuration, an adsorption heat pump and a cold heat generation method capable of efficiently generating cold heat can be obtained.

It is the schematic which shows the structure of the adsorption | suction type heat pump system of embodiment of this invention. It is a graph of the adsorption isotherm which shows an example of the adsorption | suction characteristic of an adsorbent. It is the graph which plotted adsorption amount difference (DELTA) q when the reproduction | regeneration temperature of the adsorbent which has the adsorption | suction characteristic of FIG. It is a graph of the adsorption isotherm which shows an example of the adsorption | suction characteristic of the adsorbent for assist. 4 is a flowchart of an operation process of the adsorption heat pump 10. It is a flowchart of a 1st cold heat generation mode start instruction. It is a flowchart of a first reproduction second mode start instruction. It is a flowchart of the start instruction | indication of assist reproduction | regeneration. It is a flowchart of a 2nd reproduction 2nd mode start instruction. It is a flowchart of the 2nd cold heat generation mode start instruction. It is a flowchart of the start instruction | indication of 1st reproduction | regeneration 1st mode. It is a flowchart of the 2nd reproduction 1st mode start instruction. (A) is a figure explaining the piping connection relation at the time of the 1st cold heat generation mode and the 1st regeneration 2nd mode, and (B) shows the piping connection relation at the time of the 1st cold heat generation mode and the 2nd regeneration 2nd mode. It is a figure explaining. (A) is a figure explaining the piping connection relation at the time of 2nd cold heat generation mode and 1st regeneration 1st mode, (B) is the piping connection relation at the time of 2nd cold heat generation mode and 2nd regeneration 1st mode. It is a figure explaining. It is the schematic which shows the structure of the adsorption type heat pump system of a comparative example. It is a graph which shows the relationship between regeneration temperature and adsorption amount difference (DELTA) q in the adsorption heat pump of an Example and a comparative example.

  FIG. 1 shows an adsorption heat pump 10 according to an embodiment of the present invention. The adsorption heat pump 10 includes an evaporator 12, a first main adsorber 14, a second main adsorber 16, a regeneration assist adsorber 18, and a condenser 20.

  The evaporator 12 has a fluid as a heat medium inside, and can evaporate the heat medium and perform an operation (cold heat generation) of absorbing energy (heat amount) from the outside by heat of vaporization at that time. In this embodiment, water is used as the heat medium. The evaporator 12 is connected to the first main adsorber 14 and the second main adsorber 16 through pipes 21 and 22, respectively. The pipe 21 is provided with a valve 21A, and the pipe 22 is provided with a valve 22A. The valves 21 </ b> A and 22 </ b> A are connected to the control unit 72, and opening / closing is controlled by the control unit 72. By opening the valves 21 and 22, the heat medium (gas phase state) can be moved from the evaporator 12 to the first main adsorber 14 and the second main adsorber 16.

  The control unit 72 includes a CPU, a memory, and a driver that switches between a valve and a three-way valve. The control unit 72 operates the adsorption heat pump 10 by switching between a valve and a three-way valve based on a pre-recorded program.

A pipe P <b> 0 is disposed in the evaporator 12, and the pipe P <b> 0 is connected to the cooling / heating device 70. The inside of the pipe P0 is filled with a heat exchange fluid, and the heat exchange fluid circulates in the pipe P0 by a pump (not shown), so that the cold heat generated by the evaporator 12 is supplied to the cold heat apparatus 70.

  An adsorbent 14 </ b> A is disposed in the first main adsorber 14, and an adsorbent 16 </ b> A is disposed in the second main adsorber 16. The adsorbents 14A and 16A adsorb / desorb gas-phase water as a heat medium. For example, activated carbon, mesoporous silica, zeolite, or the like can be used. The adsorbents 14A and 16A adsorb the heat medium from the evaporator 12 in the cold heat generation mode described later, and desorb the adsorbed heat medium in the first and second regeneration modes.

Between the first main adsorber 14, the second main adsorber 16 and the regeneration assist adsorber 18, pipes 23, 24, 25, 26 and 27 are arranged. One end of the pipe 23 is connected to the first main adsorber 14, and the other end is connected to the pipe 24. One end of the pipe 25 is connected to the second main adsorber 16, the other end is connected to the pipe 24, and the pipe 23 and the pipe 25 are joined by the pipe 24. The pipe 24 is connected to the pipe 26 and the pipe P3, is connected to a portion where the assist adsorbent 18A of the regeneration assist adsorber 18 is disposed via the pipe 26, and is connected to a tank 19 described later via the pipe P3. Has been.

The pipes 23 and 25 are provided with valves 23A and 25A. The valves 23 </ b> A and 25 </ b> A are connected to the control unit 72, and opening / closing thereof is controlled by the control unit 72. By opening the valves 23A and 25A, the heat medium (gas phase state) can flow out from the first main adsorber 14 and the second main adsorber 16. The pipe P3 is provided with a valve 24A, and the pipe 26 is provided with a valve 26A. The valves 24 </ b> A and 26 </ b> A are connected to the control unit 72, and opening / closing is controlled by the control unit 72. By opening the valve 26A, the portion of the regeneration assist adsorber 18 where the assist adsorbent 18A is disposed communicates with the pipe 24. Further, by opening the valve 24 </ b> A, the tank 19 of the regeneration assist adsorber 18 communicates with the pipe 24.

In the first main adsorber 14 and the second main adsorber 16, pipes P1 and P2 are disposed. The pipes P1 and P2 are branched into the pipes P1C and P1H and the pipes P2C and P2H through the three-way valves 30 and 32, and are connected to the heat source part H and the cooling part C. The pipes P1 and P2 are filled with a heat exchanging fluid, and the heat exchange fluid or cooling part heated by the heat source part H by circulating the heat exchange fluid in the pipes P1 and P2 by a pump (not shown). The heat exchange fluid cooled by C is supplied to the first main adsorber 14 and the second main adsorber 16. The three-way valves 30 and 32 are connected to the control unit 72, and switching is controlled by the control unit 72.

  In the regeneration assist adsorber 18, an assist adsorbent 18A and a tank 19 are arranged. The assist adsorbent 18A adsorbs / desorbs water as a heat medium. For example, activated carbon, mesoporous silica, zeolite, or the like can be used. The assist adsorbent 18A adsorbs the heat medium from the first main adsorber 14 and the second main adsorber 16 in the second regeneration mode described later, and desorbs the adsorbed heat medium in the first regeneration mode.

The regeneration assist adsorber 18 is connected to the condenser 20 by a pipe 28. The pipe 28 is provided with a valve 28A. The valve 28 </ b> A is connected to the control unit 72, and the opening / closing is controlled by the control unit 72. By opening the valve 28A, the heat medium (gas phase state) can be transferred from the regeneration assist adsorber 18 to the condenser 20.

In the regeneration assist adsorber 18, the pipe P3 is disposed as described above. The pipe P <b> 3 is connected to the tank 19, and the heat medium can be stored in the tank 19. One end of a pipe P5 is connected to the tank 19, and the other end of the pipe P5 is connected to the condenser 20. A valve 27A is provided in the pipe P5. The valve 27 </ b> A is connected to the control unit 72, and the opening / closing is controlled by the control unit 72. By opening the valve 27A, the tank 19 and the condenser 20 are communicated with each other, and the heat medium (liquid phase state) can be transferred from the tank 19 to the condenser 20.

  The condenser 20 condenses the heat medium (gas phase state) sent from the first main adsorber 14, the second main adsorber 16, and the regeneration assist adsorber 18, and releases the condensation heat to the outside (warm heat). Generation). The condenser 20 is connected to the evaporator 12 by a pipe 29 and sends the condensed heat medium to the evaporator 12. Further, a pipe P4 is disposed in the condenser 20, and the pipe P4 is connected to the cooling unit C. The inside of the pipe P4 is filled with a heat exchange fluid, and the heat exchange fluid in the condenser 20 is cooled by the heat exchange fluid by circulating the heat exchange fluid in the pipe P4 by a pump (not shown).

  In the present embodiment, as described above, the first main adsorber 14 and the second main adsorber 16 are arranged in parallel between the evaporator 12 and the regeneration assist adsorber 18. Therefore, the second main adsorber 16 is regenerated when the first main adsorber 14 is used for cold heat generation, and the first main adsorber 14 is used when the second main adsorber 16 is used for cold heat generation. By regenerating, continuous cold heat generation can be performed.

  In the present embodiment, the temperature of the heat exchange fluid cooled by the cooling unit C is normal temperature Tm. The temperature of the heat exchange fluid heated by the heat source unit H is assumed to be 60 ° C. to 90 ° C., and this temperature becomes the main regeneration temperature Th when the adsorbents 14A and 16A are regenerated. In this embodiment, the normal temperature Tm is about 35 ° C., the cooling temperature Tl is about 20 ° C., and the main regeneration temperature Th is about 80 ° C.

Here, adsorption and desorption of the heat medium by the adsorbent 14A in the first main adsorber 14 and the adsorbent 16A in the second main adsorber 16 will be described.

FIG. 2 shows a graph (adsorption isotherm) showing an example of the relationship (adsorption characteristic) between the relative pressure φ (the ratio between the adsorbent pressure and the saturated vapor pressure) and the adsorbent adsorption amount q. Since the amount of adsorption by the adsorbent varies depending on the relative pressure φ, the heat medium can be adsorbed by the adsorbent and desorbed from the adsorbent by changing the relative pressure φ. The larger the difference Δq in the amount of adsorption by the adsorbent corresponding to the change in the relative pressure φ, the more efficiently cold heat can be generated.

Since the above relative pressure φ depends on the temperature, the adsorption amount difference Δq becomes small when the temperature at which the heat medium is desorbed (regeneration temperature Th) is low. FIG. 3 shows a graph in which the adsorption amount difference Δq is plotted when the regeneration temperature of the adsorbent having the adsorption characteristics shown in FIG. 2 is decreased by 5 ° C. from 80 ° C. As shown in FIG. 3, when the regeneration temperature is lowered, the adsorption amount difference Δq is reduced, and it is difficult to efficiently generate cold. On the other hand, the use of factory and other various exhaust heat for regeneration of the adsorbent is required for efficient cold heat generation, but these exhaust heat is usually at a low temperature lower than 100 ° C. Use is also required for waste heat.

While contributing to cold heat generation, the first main adsorber 14 and the second main adsorber 16 having the adsorbents 14A and 16A having the above characteristics are communicated with the evaporator 12, and the heat medium evaporated from the evaporator 12 is used. Is adsorbed. At this time, cold heat is generated in the evaporator 12. The temperature in the 1st main adsorption device 14 and the 2nd main adsorption device 16 is normal temperature Tm, and the cold temperature in evaporator 12 is cold temperature Tl lower than normal temperature Tm. The relative pressure φ2 of the first main adsorber 14 (second main adsorber 16) at this time is expressed by Equation 1.

φ2 = saturated vapor pressure at temperature Tl / saturated vapor pressure at temperature Tm (Equation 1)

When the adsorbent having the adsorption characteristics shown in FIG. 2 is used as the adsorbents 14A and 16A, if the relative temperature φ2 = 0.4 at the cold temperature Tl = 20 ° C. and the normal temperature Tm = 35 ° C. The heat medium adsorption amount q0 is about 0.3.

The operation of desorbing the heat medium adsorbed by the adsorbents 14A and 16A is referred to as regeneration, and in this embodiment, regeneration is performed in two stages of first regeneration and second regeneration. In the first regeneration, the first main adsorber 14 (second main adsorber 16) communicates with the tank 19 in the regeneration assist adsorber 18 through the pipe P3. At this time, the temperature in the first main adsorber 14 (second main adsorber 16) is the main regeneration temperature Th.

On the other hand, the vapor of the heat medium supplied to the pipe P <b> 3 in the regeneration assist adsorber 18 is condensed to become a liquid phase and stored in the tank 19. The regeneration assist adsorber 18 is heated by the condensation heat at this time, and reaches the assist regeneration temperature Ta. The relative pressure φ4 of the first main adsorber 14 (second main adsorber 16) at this time is expressed by Equation 2.

φ4 = saturated vapor pressure at temperature Ta / saturated vapor pressure at temperature Th (Formula 2)

When the adsorbent having the adsorption characteristics shown in FIG. 2 is used as the adsorbents 14A and 16A, if the main regeneration temperature Th = 80 ° C., the assist regeneration temperature Ta = 45 ° C., and the relative pressure φ4 = 0.2, the adsorption The heat medium adsorption amount per material is about q4 = 0.14, and the heat medium having the difference Δq1 = 0.16 between q0 and q4 is desorbed from the adsorbents 14A, 16A.

In the second regeneration, the first main adsorber 14 (second main adsorber 16) communicates with the regeneration assist adsorber 18 (the portion where the assist adsorbent 18A is disposed). At this time, the temperature in the first main adsorber 14 (second main adsorber 16) is the main regeneration temperature Th, and the temperature in the regeneration assist adsorber 18 is normal temperature Tm. The relative pressure φ3 of the first main adsorber 14 (second main adsorber 16) at this time is expressed by Equation 3.

φ3 = Equilibrium pressure in regeneration assist adsorber at temperature Tm / saturated vapor pressure at temperature Th (Equation 3)

Here, the temperature in the regeneration assist adsorber 18 is normal temperature Tm, and the saturated vapor pressure is the same as the saturated vapor pressure in the condenser 20. Under the same normal temperature Tm, the assist adsorbent 18A causes the equilibrium pressure of the regeneration assist adsorber 18 to be lower than the saturated vapor pressure when no adsorbent is disposed. Therefore, the relative pressure φ3 is smaller than the relative pressure φ4. When the adsorbent having the adsorption characteristics shown in FIG. 2 is used as the adsorbents 14A and 16A, if the relative pressure φ3 = 0.08, the heat medium adsorption amount per adsorbent q3 = 0.07, and the adsorbent From 14A and 16A, the heating medium having a difference Δq3 = 0.07 between q3 and q4 is further desorbed.

As described above, efficient heat generation can be performed by adsorbing a large amount of heat medium during cold heat generation and detaching as much of the adsorbed heat medium as possible during regeneration. That is, as the difference Δq0 = Δq3 + Δq4 between the amount of adsorption q0 by the adsorbent during cold heat generation and the amount of adsorption q3 of the adsorbent during regeneration increases, cold heat generation can be performed more efficiently.

Next, heat medium adsorption and desorption (assist regeneration) by the assist adsorbent 18A in the regeneration assist adsorber 18 will be described.

The assist regeneration for detaching the heat medium from the assist adsorbent 18A is performed during the first regeneration of the first main adsorber 14 and the second main adsorber 16. At this time, the inside of the regeneration assist adsorber 18 is heated by the heat of condensation when the vapor of the heat medium supplied to the pipe P3 in the regeneration assist adsorber 18 is condensed into a liquid phase. The assist regeneration temperature Ta is reached. The regeneration assist adsorber 18 (assist adsorbent 18A) is in communication with the condenser 20. The relative pressure φ5 of the regeneration assist adsorber 18 at this time is expressed by Expression 4.

φ5 = saturated vapor pressure at temperature Tm / saturated vapor pressure at temperature Ta (Formula 4)

FIG. 4 shows a graph (adsorption isotherm) showing an example of the relationship (adsorption characteristic) between the relative pressure and the adsorption amount of the assist adsorbent 18A. When the assist adsorbent 18A having the adsorption characteristics is used, assuming that the normal temperature Tm = 35 ° C., the assist regeneration temperature Ta = 45 ° C., and the relative pressure φ5 = 0.58, the heat medium adsorption amount q5 = 0 per adsorbent. .04 or so.

On the other hand, the assist adsorbent 18A adsorbs the heat medium desorbed from the first main adsorber 14 and the second main adsorber 16 during the second regeneration of the first main adsorber 14 and the second main adsorber 16 ( Assist adsorption). At the time of the second regeneration, the temperature inside the regeneration assist adsorber 18 is normal temperature Tm, and the portion where the assist adsorbent 18A is disposed is not in communication with the condenser 20.

At this time, the regeneration assist adsorber 18 adsorbs the assist adsorber 18 heat medium, and if the adsorbent having the adsorption characteristics shown in FIG. 4 is used as the assist adsorbent 18A, the adsorption amount is about 0.35. Adsorption proceeds until.

In the above example, the adsorption difference Δq4 = 0.31 at the assist adsorbent 18A. Since the assist adsorbent 18A can be used more efficiently as the adsorption amount difference Δq4 is larger, the assist adsorbent 18A has a larger adsorption amount difference at a relative pressure higher by about 0.1 to 0.2 from the relative pressure φ1. It is preferable to select one.

  Next, the operation process of the adsorption heat pump 10 of this embodiment will be described. In the operation process of the adsorption heat pump 10, when one of the first main adsorber 14 and the second main adsorber 16 is in the cold heat generation mode, the other is in the first regeneration mode and the second regeneration mode. The first regeneration mode and the second regeneration mode are alternately repeated to generate continuous cold heat. Hereinafter, the cold generation mode of the first main adsorber 14 is referred to as a cold generation first mode, and the cold generation mode of the second main adsorber 16 is referred to as a cold generation second mode. Further, the first regeneration mode and the second regeneration mode of the first main adsorber 14 are referred to as a first regeneration first mode and a second regeneration first mode, and the first regeneration mode and the second regeneration of the second main adsorber 16 are referred to. The modes are referred to as a first reproduction second mode and a second reproduction second mode.

  The adsorption heat pump operation process is executed by the controller 72. When a process start instruction is input from the user to the controller 72, the adsorption heat pump operation process shown in FIG. 5 is executed.

  First, in step S10, the start of the first cold heat generation mode is instructed. As shown in FIG. 6, the first cold heat generation mode is started by closing the valve 23A in step S12, opening the valve 21A in step S14, and switching the three-way valve 30 in step S16 to communicate the pipe P1 with P1C. Is instructed. As a result, the heat medium evaporates in the evaporator 12, and the evaporated heat medium moves to the first main adsorber 14 via the pipe 21 and is adsorbed by the adsorbent 14A. At this time, the temperature in the evaporator 12 is a cold temperature Tl, and the temperature in the first main adsorber 14 is a normal temperature Tm. The adsorbent 14A adsorbs the heat medium with a relative pressure φ2 (see FIG. 13A).

  Next, in step S20, the start of the first reproduction second mode is instructed. As shown in FIG. 7, the first regeneration second mode is started by closing the valves 22A and 26A in step S22, opening the valve 24A in step S24, and switching the three-way valve 32 in step S26 to connect the pipe P2. Instructed by communicating with P2H. Thereby, the temperature in the second main adsorber 16 becomes the main regeneration temperature Th, communicates with the pipe P3 functioning as the heat transfer tube of the regeneration assist adsorber 18, and the adsorbent 16A is regenerated with the relative pressure φ4.

  Next, in step S30, the start of assist playback is instructed. As shown in FIG. 8, the start of the assist regeneration is instructed by opening the valve 28A in step S32 and closing the valve 27A in step S34. Thereby, the temperature in the regeneration assist adsorber 18 becomes the assist regeneration temperature Ta, communicates with the condenser 20 (normal temperature Tm), and the assist adsorbent 18A is regenerated with the relative pressure φ5.

  Next, it is determined whether or not a predetermined time T1 has elapsed in step S38 (see FIG. 5). Here, the predetermined time T1 is a time taken to regenerate the adsorbent 16A of the second main adsorber 16, and it is preferable to secure a time during which the adsorbent 16A can be sufficiently regenerated at the relative pressure φ4. When the predetermined time T1 has elapsed, the process proceeds to step S40.

  In step S40, the start of the second reproduction second mode is instructed. The start of the second regeneration second mode is instructed by closing the valves 24A and 28A in step S42 and opening the valves 26A and 27A in step S44, as shown in FIG. Thereby, the second main adsorber 16 is communicated with the regeneration assist adsorber 18. The regeneration temperature Th is maintained in the second main adsorber 16. On the other hand, the temperature in the regeneration assist adsorber 18 is cooled by evaporating the liquid heat medium stored in the tank 19, and becomes the same room temperature Tm as in the condenser 20. Is regenerated with a relative pressure φ3. At this time, the assist adsorbent 18A of the regeneration assist adsorber 18 adsorbs the heat medium from the second main adsorber 16 (see FIG. 13B).

  Next, in step S48 (see FIG. 5), it is determined whether or not a predetermined time T2 has elapsed. Here, it is preferable that the predetermined time T2 ensure a time during which the adsorbent 16A of the second main adsorber 16 can be sufficiently regenerated with the relative pressure φ3. When the predetermined time T2 has elapsed, the process proceeds to step S50.

  In step S50, the start of the second cold heat generation mode is instructed. As shown in FIG. 10, the second cold heat generation mode is started by closing the valve 25A in step S52, opening the valve 22A in step S54, switching the three-way valve 32 in step S56, and communicating the pipe P2 with P2C. Is instructed. As a result, the heat medium evaporates in the evaporator 12, and the evaporated heat medium moves to the second main adsorber 16 via the pipe 22 and is adsorbed by the adsorbent 16A. At this time, the temperature in the evaporator 12 is the cold temperature Tl, and the temperature in the second main adsorber 16 is the normal temperature Tm. The adsorbent 16A adsorbs the heat medium with a relative pressure φ2 (see FIG. 14A).

  Next, in step S60, the start of the first reproduction first mode is instructed. As shown in FIG. 11, the first regeneration first mode is started by closing the valves 21A and 26A in step S62, opening the valve 24A in step S64, and switching the three-way valve 30 in step S66 to connect the pipe P1. Instructed by communicating with P1H. As a result, the temperature in the first main adsorber 14 becomes the main regeneration temperature Th, communicates with the condenser 20 (normal temperature Tm), and the adsorbent 14A is regenerated with the relative pressure φ4.

  Next, in step S70, the start of assist playback is instructed. The start of assist playback is defined in steps S32 and S34 shown in FIG. Thereby, the temperature in the regeneration assist adsorber 18 becomes the assist regeneration temperature Ta, communicates with the condenser 20 (normal temperature Tm), and the assist adsorbent 18A is regenerated with the relative pressure φ5.

  Next, in step S78 (see FIG. 5), it is determined whether or not a predetermined time T3 has elapsed. Here, the predetermined time T3 is a time taken to regenerate the adsorbent 14A of the first main adsorber 14, and it is preferable to secure a time for sufficiently regenerating the adsorbent 14A at the relative pressure φ4. When the predetermined time T3 has elapsed, the process proceeds to step S80.

  In step S80, the start of the second reproduction first mode is instructed. As shown in FIG. 12, the start of the second regeneration first mode is instructed by closing the valves 24A and 28A in step S82 and opening the valves 26A and 27A in step S84. Thereby, the first main adsorber 14 is communicated with the regeneration assist adsorber 18. The regeneration temperature Th is maintained in the first main adsorber 14. On the other hand, the temperature in the regeneration assist adsorber 18 is cooled by evaporating the liquid heat medium stored in the tank 19, and becomes the same room temperature Tm as in the condenser 20. Is regenerated with a relative pressure φ3. At this time, the assist adsorbent 18A of the regeneration assist adsorber 18 adsorbs the heat medium from the first main adsorber 14 (see FIG. 14B).

  Next, it is determined whether or not a predetermined time T4 has elapsed in step S88 (see FIG. 5). Here, it is preferable that the predetermined time T2 secure a time for sufficiently regenerating the adsorbent 14A of the first main adsorber 14 at the relative pressure φ3. When the predetermined time T4 has elapsed, the process returns to step S10 and the following processing is repeated.

  As described above, by performing the adsorption heat pump operation, it is possible to continuously generate cold.

  In the adsorption heat pump 10 of the present embodiment, the first main adsorber 14 and the second main adsorber 16 are communicated with the regeneration assist adsorber to perform the second regeneration. Therefore, the relative pressure φ3 is set to the relative pressure during the first regeneration. It can be made smaller than φ4. Therefore, more heat medium can be desorbed from the adsorbents 14A and 16A, and cold heat can be generated efficiently.

  In the adsorption heat pump 10 of the present embodiment, the second regeneration of the first main adsorber 14 and the second main adsorber 16 is performed after the first regeneration. Therefore, it is not necessary to perform all regeneration of the first main adsorber 14 and the second main adsorber 16 by the regeneration assist adsorber 18. As a result, the amount of adsorption required for the regeneration assist adsorber 18 can be reduced, the regeneration assist adsorber 18 can be efficiently used with a small capacity, and the first main adsorber 14 and the second main adsorber 16. Can be played back.

  Further, in the adsorption heat pump 10 of the present embodiment, the regeneration assist adsorber 18 is regenerated (assist regeneration) using the steam obtained by the first regeneration of the first main adsorber 14 and the second main adsorber 16. Therefore, a heat source for assist regeneration is not required separately, and the heat source can be used efficiently.

Further, in the adsorption heat pump 10 of the present embodiment, regeneration (assist regeneration) of the regeneration assist adsorber 18 is performed during the first regeneration of the first main adsorber 14 and the second main adsorber 16. Therefore, after one main adsorber (one of the first main adsorber 14 and the second main adsorber 16) is regenerated for the first time, the main adsorber (the first main adsorber 14, the second main adsorber 14) is continuously generated. The second regeneration of one of the units 16 can be performed, and the regeneration assist adsorption unit 18 can be efficiently regenerated with less time loss. As a result, the two main adsorbers (the first main adsorber 14 and the second main adsorber 16) can be second regenerated by the single regeneration assist adsorber 18.

  Moreover, in the adsorption heat pump 10 of this embodiment, two main adsorption devices (the 1st main adsorption device 14 and the 2nd main adsorption device 16) are used, and the cold heat treatment of one side and the reproduction | regeneration by the other are performed alternately. Thus, continuous cold heat generation can be performed.

  Further, in the adsorption heat pump 10 of the present embodiment, the first main adsorber 14, the second main adsorber 16, and the regeneration assist adsorber 18 are connected to the condenser 20, and therefore the heat desorbed from each of them. The medium can be condensed by the condenser 20 and sent to the evaporator 12.

  The adsorption heat pump 10 of the present embodiment includes two main adsorbers, the first main adsorber 14 and the second main adsorber 16, but one main adsorber when not continuously operated. Only (the 1st main adsorption device 14 or the 2nd main adsorption device 16) may be provided. In this case, cold heat generation, first regeneration, and second regeneration are repeated with one main adsorber. Even in this case, since the second regeneration is performed by connecting the first main adsorber 14 (or the second main adsorber 16) to the regeneration assist adsorber, the relative pressure φ3 is smaller than the relative pressure φ1 during the first regeneration. More heat medium can be desorbed from the adsorbent 14A (16A), and cold heat can be generated efficiently. The second regeneration of the first main adsorber 14 (or the second main adsorber 16) is performed after the first regeneration. Therefore, it is not necessary to perform all regeneration of the first main adsorber 14 (or the second main adsorber 16) by the regeneration assist adsorber 18, and the regeneration assist adsorber 18 having a relatively small capacity can be used efficiently. Can do.

  In the above embodiment, for example, water or ammonia can be used as the heat medium. Further, as the adsorbents 14A and 16A, it is only necessary that the heat medium can be adsorbed and desorbed. For example, silica gel can be used. As the assist adsorbent 18A, silica gel can be used, but zeolite, activated carbon, and other substances can also be used.

  FIG. 15 is a schematic view of an adsorption heat pump 60 as a comparative example that does not include the regeneration assist adsorber 18. The adsorption type heat pump 60 and the adsorption heat pump 10 of the present embodiment compared the adsorption amount difference Δq for each main regeneration temperature Th when cold generation was performed. As the adsorbents 14A and 16A, those having the adsorbing characteristics shown in FIG. 2 are used, and as the adsorbing adsorbent 18A, the adsorbing characteristics having a large adsorption amount difference at a relative pressure 0.1 higher than the relative pressure φ4 shown in FIG. The thing which has was used. FIG. 16 shows the adsorption amount difference Δq when the main regeneration temperature is changed by 5 ° C. at Th 55 ° C. to 80 ° C. Even if the main regeneration temperature Th is as low as 55 ° C., the adsorption heat pump 10 of the present embodiment can obtain a large adsorption amount difference Δq.

DESCRIPTION OF SYMBOLS 10 Adsorption-type heat pump 12 Evaporator 14 1st main adsorption device 16 2nd main adsorption device 18 Regenerative assist adsorption device 20 Condenser

Claims (6)

An evaporator for evaporating the heating medium;
A main adsorber that is connected to the evaporator and adsorbs the heat medium, and is first regenerated by desorbing the heat medium at a main regeneration temperature;
Assist regeneration is performed at the assist regeneration temperature by using steam of the heat medium that is connected to the main adsorber and desorbed from the main adsorber during the first regeneration, and from the main adsorber after the first regeneration. A regeneration assist adsorber that adsorbs a heat medium and secondly regenerates the main adsorber;
Adsorption heat pump with   2. The adsorption heat pump according to claim 1, wherein the main adsorber includes a first main adsorber and a second main adsorber connected to the evaporator and the regeneration assist adsorber, respectively.   The first regeneration and the second regeneration of the second main adsorber are performed when the heat medium is adsorbed by the first main adsorber, and the regeneration assist adsorption is performed during the first regeneration of the second main adsorber. The first regeneration of the first main adsorber and the second regeneration are performed when the heat medium is adsorbed by the second main adsorber, and the assist regeneration of the first main adsorber is performed. The adsorption heat pump according to claim 2, wherein the assist regeneration of the regeneration assist adsorber is performed during the first regeneration.   The adsorption heat pump according to any one of claims 1 to 3, wherein the main adsorber and the regeneration assist adsorber are connected to a condenser that condenses a heat medium. The heat medium is evaporated by the evaporator to generate cold heat, and the heat medium is adsorbed by the main adsorber to generate heat of adsorption, and the heat of adsorption is supplied to the regeneration assist adsorber to perform the regeneration at the assist regeneration temperature. Assist regeneration of assist sucker,

The adsorbed heat medium at the main regeneration temperature is desorbed from the main adsorber to regenerate the main adsorber for the first time, and assists with the vapor of the heat medium desorbed from the main adsorber during the first regeneration. Assist regeneration of the regeneration assist adsorber at the regeneration temperature,
A heat medium from the main adsorber is adsorbed by the regeneration assist adsorber after the first regeneration, and the main adsorber is second regenerated;
Cold heat generation method. The main adsorber has a first main adsorber and a second main adsorber,
The regeneration assist adsorber performs the first regeneration and the second regeneration of the second main adsorber during the cold heat generation in the first main adsorber, and the first regeneration of the second main adsorber. Assist playback of
Performing the first regeneration and the second regeneration of the first main adsorber during the cold heat generation in the second main adsorber, and the regeneration assist adsorber during the first regeneration of the first main adsorber Performing the assist playback of
The cold heat generation method according to claim 5.

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