JP7326791B2 - Adsorption chiller - Google Patents

Description

The present invention relates to an adsorption chiller.

In an adsorption chiller, a cooling water freeze prevention technology is known in which heat is exchanged between a pipe through which a heat medium heated by a boiler flows and a pipe through which cooling water flows to raise the temperature of the cooling water (for example, See Patent Document 1). Even when the temperature of the cooling water does not freeze, the salt contained in the adsorbent may deliquesce when the temperature of the cooling water drops.
[Prior art documents]
[Patent Literature]
[Patent document 1] JP-A-11-257788

In an adsorption chiller, it is desirable to prevent deliquescence of the adsorbent by suppressing an excessive temperature drop of the cooling water.

SUMMARY OF THE INVENTION In a first aspect of the present invention, an adsorption chiller is provided. Adsorption chillers may comprise an evaporator section, a pair of adsorbers, and a condenser section. The evaporator may evaporate the refrigerant. Each of the pair of adsorbers may be provided therein with an adsorbent capable of adsorbing and desorbing the refrigerant depending on the temperature. The condensation section may cool and condense the refrigerant. The adsorption chiller may comprise a hot water channel and a cooling water channel. The warm water channel may be a channel through which warm water flows through one of the pair of adsorbers. The cooling water channel may be a channel through which cooling water flows through the other of the pair of adsorbers. The adsorption chiller may comprise a heat exchanger. The heat exchanger may exchange heat between the hot water flow path and the cooling water flow path so that the temperature of the cooling water falls within a predetermined temperature range.

At least one of the hot water flow path and the cooling water flow path may branch into a first flow path through the heat exchanger and a second flow path bypassing the heat exchanger. The adsorption chiller may comprise a controller. The controller may control the flow rate of hot water or cooling water flowing through the first flow path.

The hot water flow path may pass through the heat exchanger after passing through one of the pair of adsorbers.

The controller may switch the flow path through which the hot water flows so that the hot water flows through either the first flow path or the second flow path according to the temperature of the cooling water.

When the temperature of the cooling water is lower than a predetermined temperature, the controller may switch the flow path through which the hot water flows so that the hot water flows through the first flow path.

The cooling water flow path may pass through a heat exchanger after passing through the condenser and before passing through the adsorber.

The adsorption chiller has a first operation mode in which one of the pair of adsorbers functions as an adsorption section for adsorbing refrigerant and the other adsorber functions as a desorption section for desorbing refrigerant. The second operation mode may be alternately switched between one device functioning as a desorbing section for desorbing the refrigerant and the other adsorbing device functioning as an adsorbing section for adsorbing the refrigerant. The adsorbent provided in the adsorption section may adsorb the refrigerant evaporated by the evaporation section. The refrigerant may be desorbed from the adsorbent provided in the desorption section. The condensing part may condense the desorbed refrigerant. The evaporator may evaporate the refrigerant condensed by the condenser.

The controller may control the flow rate of hot water flowing through the first flow path according to the switching timing between the first operation mode and the second operation mode.

The adsorption chiller has a temperature setting unit that sets the temperature range in the first operation mode lower than the temperature range in the second operation mode when one adsorber is more deteriorated than the other adsorber. Be prepared.

When one adsorber is more deteriorated than the other adsorber, the controller adjusts the flow rate of hot water flowing through the first flow path in the first operation mode to the first flow rate in the second operation mode. It may be less than the flow rate of hot water flowing through the channel.

The adsorption chiller may include a temperature setting unit that sets a predetermined temperature range so that the temperature of the cooling water is lowered according to deterioration of the pair of adsorbers.

The adsorption chiller has a first operation mode in which one of the pair of adsorbers functions as an adsorption section for adsorbing refrigerant and the other adsorber functions as a desorption section for desorbing refrigerant. The second operation mode may be alternately switched between one device functioning as a desorbing section for desorbing the refrigerant and the other adsorbing device functioning as an adsorbing section for adsorbing the refrigerant. The adsorbent provided in the adsorption section may adsorb the refrigerant evaporated by the evaporation section. The refrigerant may be desorbed from the adsorbent provided in the desorption section. The condensing part may condense the desorbed refrigerant. The evaporator may evaporate the refrigerant condensed by the condenser. The adsorption chiller may adjust the time in the first operation mode and the time in the second operation mode based on the degree of deterioration of one adsorber and the degree of deterioration of the other adsorber.

The adsorption chiller may have a heat storage unit. The heat storage unit may temporarily store the heat of hot water flowing through one of the pair of adsorbers. The heat exchanger may exchange heat between the hot water flow path and the cooling water flow path in the heat storage section.

The hot water flow path may obtain hot water from a heat source. The heat storage unit may contact the heat source.

It should be noted that the above summary of the invention does not list all the necessary features of the invention. Subcombinations of these feature groups can also be inventions.

FIG. 4 is a diagram showing an example of flow paths when heat is exchanged between a hot water flow path and a cooling water flow path in the first operation mode of the adsorption chiller according to the first embodiment of the present invention; FIG. 3 is a diagram showing an example of flow paths when heat is exchanged between a hot water flow path and a cooling water flow path in a second operation mode of the adsorption chiller shown in FIG. 1; FIG. 2 is a diagram showing an example of flow paths when heat is not exchanged between a hot water flow path and a cooling water flow path in a first operation mode of the adsorption chiller shown in FIG. 1; FIG. 2 is a diagram showing an example of flow paths when heat is not exchanged between a hot water flow path and a cooling water flow path in a second operation mode of the adsorption chiller shown in FIG. 1; It is an example of an adsorption isotherm of an adsorbent. 4 is a flow chart showing an example of processing of the adsorption chiller 1. FIG. 8 is a flowchart showing another example of processing of the adsorption chiller 1. FIG. 8 is a flowchart showing another example of processing of the adsorption chiller 1. FIG. It is a figure which shows an example of the adsorption chiller by 2nd Embodiment of this invention. FIG. 10 is a diagram showing an example of processing of the adsorption chiller 1 shown in FIG. 9; FIG. 10 is a diagram showing another example of processing of the adsorption chiller 1 shown in FIG. 9; FIG. 10 is a diagram showing another example of processing of the adsorption chiller 1 shown in FIG. 9; It is a figure which shows an example of the adsorption-type refrigerator in 3rd Embodiment of this invention. It is a figure which shows an example of the adsorption-type refrigerator in 4th Embodiment of this invention. It is a figure which shows an example of the adsorption-type refrigerator in 5th Embodiment of this invention.

Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. Also, not all combinations of features described in the embodiments are essential for the solution of the invention.

FIG. 1 is a diagram showing an example of flow paths when heat is exchanged between a hot water flow path and a cooling water flow path in a first operation mode of an adsorption chiller according to a first embodiment of the present invention. FIG. 2 is a diagram showing an example of flow paths when heat is exchanged between the hot water flow path and the cooling water flow path in the second operation mode of the adsorption chiller shown in FIG. The adsorption chiller 1 uses, for example, waste water to produce cold water or cold liquid. The waste heat water may be generated using a heat source such as computer waste heat from a data center or the like and waste hot water from a factory. The adsorption chiller 1 evaporates the refrigerant in a low-temperature, low-pressure evaporator. Cold water or cold liquid cooled by the heat of vaporization is generated in the evaporator. The coolant may be water.

The adsorption chiller comprises a pair of adsorbers 10, 11, an evaporator 20 and a condenser 30, as shown in FIG. The pair of adsorbers 10,11 may be a two-vessel set of adsorbers 10,11. One of the pair of adsorbers 10 and 11 functions as an adsorption section and the other functions as a desorption section. In the first operation mode shown in FIG. 1, the first adsorber 10 functions as an adsorption section and the second adsorber 11 functions as a desorption section. On the other hand, in the second operation mode shown in FIG. 2, the first adsorber 10 functions as a desorption unit and the second adsorber 11 functions as an adsorption unit. The adsorption chiller 1 is operated such that the first operation mode and the second operation mode are alternately switched.

Adsorbents 12 and 13 capable of adsorbing and desorbing a refrigerant according to the temperature are provided inside each of the adsorbers 10 and 11, respectively. The adsorbents 12, 13 may contain salts. The adsorbents 12 and 13 may be moisture adsorbents containing a porous body and a complex salt contained in the porous body, and the heat of dissolution of the complex salt in water may be negative. The complex salt may comprise _a salt selected from NaCl, _NaBr.2H2O , KBr, KCl, _CaCl2.6H2O , KI. The porous body may be _a metal oxide nanoparticle condensate comprising one or more selected from _SiO2 , _TiO2 , _ZrO2 , _Al2O3 , MgO. However, the adsorbents 12 and 13 are not limited to these cases.

The adsorption chiller 1 includes an evaporator 20 and a condenser 30 . The evaporator 20 evaporates the refrigerant. Each of the adsorbers 10 and 11 and the evaporator 20 communicate with each other via valves. Further, each of the adsorbers 10 and 11 and the condensing section 30 are also communicated with each other via valves. Valves are not shown in FIG.

Hot water flows through one of the pair of adsorbers 10 and 11 and cooling water flows through the other of the pair of adsorbers 10 and 11 . In one example, the temperature of the hot water may be 50°C or higher and 100°C or lower. In this example, the adsorption chiller 1 comprises a distribution channel 4 passing through a first adsorber 10 and a distribution channel 5 passing through a second adsorber 11 . Each inlet of the flow path 4 and the flow path 5 may be connected to two output ports of the first four-way valve 14 . The two inlets of the first four-way valve 14 may be connected to a hot water path 2a through which hot water passes and a cooling water path 3a through which cooling water passes. On the other hand, each outflow port of the flow path 4 and the flow path 5 may be connected to two inflow ports of the second four-way valve 15 . Two outlets of the second four-way valve 15 may be connected to a hot water path 2b through which hot water passes and a cooling water path 3b through which cooling water passes.

The adsorption chiller 1 switches paths through which hot water and cooling water flow using a first four-way valve 14 and a second four-way valve 15 . In the first operation mode, the circulation path 4 is selected as the cooling water path through which the cooling water flows, and the circulation path 5 is selected as the hot water path through which the hot water flows. On the other hand, in the second operation mode, the circulation path 5 is selected as the cooling water path through which the cooling water flows, and the circulation path 4 is selected as the hot water path through which the hot water flows. The first operation mode and the second operation mode are alternately switched, for example, every 3 minutes or more and 20 minutes or less.

One of the pair of adsorbers 10 and 11 functions as an adsorption section and the other functions as a desorption section. First, in the first operation mode shown in FIG. 1, the first adsorber 10 functions as an adsorption section and the second adsorber 11 functions as a desorption section. As cooling water flows through the first adsorber 10, the adsorbent 12 adsorbs the refrigerant. As the refrigerant is adsorbed by the adsorbent 12 in the first adsorber 10, the pressure in the evaporating section 20 decreases, and the refrigerant in the evaporating section 20 becomes easier to evaporate. Cold water 21 is cooled and output by the generation of heat of vaporization.

There is also a limit to the amount of refrigerant that can be adsorbed by the adsorbent 12 in the first adsorber 10 . Therefore, the operation mode switches from the first operation mode to the second operation mode. In the second operation mode shown in FIG. 2, the first adsorber 10 functions as a desorption unit and the second adsorber 11 functions as an adsorption unit. Refrigerant is desorbed from the adsorbent 12 by flowing warm water through the first adsorber 10 . As a result, the adsorbent 12 is regenerated to a state capable of adsorbing the refrigerant again. The desorbed refrigerant vapor moves to the condensation section 30 . The condensing section 30 condenses the refrigerant vapor into a liquid refrigerant. The liquid refrigerant moves to the evaporator 20 through a pipe or the like.

1 and 2, thick arrows indicate the flow of cooling water, and thin arrows indicate the flow of hot water. The adsorption chiller 1 includes a supply mechanism for supplying hot water to one of the pair of adsorbers 10 and 11 . In this example, the adsorption chiller 1 includes a hot water path 2a through which hot water passes, a hot water pump 8, and a hot water path 2b as a hot water supply mechanism. The adsorption chiller 1 has a supply mechanism for supplying cooling water to the other of the pair of adsorbers 10 and 11 . In this example, the adsorption chiller 1 includes a cooling water pump 9, a cooling water path 3a, and a cooling water path 3b as a cooling water supply mechanism.

The cooling water is generated by the cooling water generator 16 . The cooling water generator 16 may be a cooling tower. In the first operation mode in which the first adsorber 10 functions as an adsorption section (adsorption tank) and the second adsorber 11 functions as a desorption section (desorption tank), the cooling water discharged from the cooling water generation section 16 1, cooling water pump 9, cooling water path 3a, heat exchanger 40, first four-way valve 14, circulation path 4, first adsorber 10, second four-way valve 15, condenser 30, and the cooling water path 3b, and returns to the cooling water generator 16. These cooling water pump 9, cooling water path 3a, heat exchanger 40, first four-way valve 14, circulation path 4, first adsorber 10, second four-way valve 15, condenser 30, and cooling water path 3b , form a cooling water flow path through which the cooling water flows.

The cooling water pump 9 moves the cooling water along the cooling water flow path. The installation position of the cooling water pump 9 is not limited to that shown in FIG. The cooling water flow path is not limited to that shown in FIG. Cooling water flows through the adsorber 10 of the pair of adsorbers 10 and 11 . The cooling water cools the adsorbent when the adsorbent adsorbs the refrigerant, thereby promoting the adsorption of the refrigerant.

Hot water may be generated using heat sources such as waste heat from computers in data centers and hot water in factories. In this example, hot water flows through the hot water main pipe 17 . In the first operation mode, the hot water obtained from the hot water main pipe 17 is, as shown in FIG. It circulates through the two-way valve 15 and the hot water path 2b. The outlet side of the hot water path 2b branches into a first flow path 6 and a second flow path 7. As shown in FIG.

The first flow path 6 is a flow path passing through the heat exchanger 40, and is a so-called bypass flow path. The second flow path 7 is a route bypassing the heat exchanger 40 . Hot water that has passed through the first flow path 6 or the second flow path 7 may join the hot water main pipe 17 . A first valve 51 is provided in the first flow path 6 . A second valve 52 is provided in the second flow path 7 . The first valve 51 is an example of a first flow controller that adjusts the flow rate of hot water or cooling water in the first flow path 6 . The second valve 52 is an example of a second flow controller that adjusts the flow rate of hot water or cooling water in the second flow path 7 .

In the example shown in FIG. 1, the first valve 51 is open and the second valve 52 is closed. Therefore, hot water flows through the first channel 6 . As a result, the heat exchanger 40 exchanges heat between the hot water path and the cooling water path. The heat exchange raises the temperature of the cooling water. In this example, a temperature sensor 18 is provided to measure the temperature of the cooling water at a location that has passed through the heat exchanger 40 . Also, a third valve 53 may be provided in the hot water flow path after passing through the heat exchanger 40 . The third valve 53 may be open when the first valve 51 is open, and the third valve 53 may be closed when the first valve 51 is closed. However, the third valve 53 may be omitted.

The hot water path 2a, the hot water pump 8, the first four-way valve 14, the flow path 5, the second adsorber 11, the second four-way valve 15, the hot water path 2b, the first flow path 6, and the second flow path 7 are A hot water channel is formed through which hot water flows. However, the hot water flow path is not limited to that shown in FIG. Hot water heats the adsorbent during desorption (regeneration) of the adsorbent to desorb the adsorbed refrigerant.

The hot water flow path passes through a heat exchanger 40 in the portion of the first flow path 6 after passing through the desorption section, which is one of the pair of adsorbers 10,11. Therefore, the hot water can flow through the desorption section (adsorber 11 in FIG. 1) before the temperature is lowered by heat exchange, thereby preventing the deterioration of the ability to desorb the refrigerant from the adsorbent.

As shown in FIG. 2, cooling water is generated in a second operation mode in which the first adsorber 10 functions as a desorption unit (desorption tank) and the second adsorber 11 functions as an adsorption unit (adsorption tank). The cooling water discharged from the unit 16 passes through the cooling water pump 9, the cooling water path 3a, the heat exchanger 40, the first four-way valve 14, the circulation path 5, the second adsorber 11, the second four-way valve 15, and the condenser section. 30, and the cooling water path 3b, and returns to the cooling water generator 16. These cooling water pump 9, cooling water path 3a, heat exchanger 40, first four-way valve 14, circulation path 5, second adsorber 10, second four-way valve 15, condenser 30, and cooling water path 3b , form a cooling water flow path through which the cooling water flows.

In the second operation mode, the hot water obtained from the hot water main pipe 17 is, as shown in FIG. It circulates through the two-way valve 15 and the hot water path 2b. The outlet side of the hot water path 2b branches into a first flow path 6 and a second flow path 7. As shown in FIG.

The hot water path 2a, the hot water pump 8, the first four-way valve 14, the flow path 5, the second adsorber 11, the second four-way valve 15, the hot water path 2b, the first flow path 6, and the second flow path 7 are , forming a hot water flow path through which hot water flows.

The two adsorbers 10, 11 alternately carry out an adsorption step and a desorption step. The water vapor in the evaporator 20 evaporates in the adsorption process, and the medium flowing in the evaporator is cooled by the heat of vaporization at that time and output.

The adsorption chiller 1 of this embodiment includes a controller 50 . The controller 50 may be a computer. The controller 50 controls the flow rate of hot water flowing through the first flow path 6 . The controller 50 may switch the route through which the hot water flows so that the hot water flows through either the first flow path 6 or the second flow path 7 according to the temperature of the cooling water. The adsorption chiller 1 may include a temperature sensor 18 that acquires temperature information of cooling water. A temperature sensor 18 may be provided at the outlet from the heat exchanger 40 . However, the mounting position of the temperature sensor 18 is not limited to this case. The adsorption chiller 1 may also include a temperature sensor 19 that measures temperature information of the chilled water 21 cooled by the heat of vaporization associated with the evaporation of the refrigerant in the evaporator 20 .

The control unit 50 receives the temperature information of the cooling water and the temperature information of the cold water 21 in the evaporating unit 20 . Further, the controller 50 may control at least one of the hot water pump 8 and the cooling water pump 9 . In one example, the controller 50 controls the cooling water pump 9 . Also, the control unit 50 may be communicably connected to the first valve 51 and the second valve 52 and may control opening and closing of the first valve 51 and the second valve 52 . In this case, the controller 50 switches the route through which the hot water flows so that the hot water flows through either the first route or the second route according to the temperature of the cooling water. When the temperature of the cooling water is lower than a predetermined temperature, the controller 50 may switch the flow path through which hot water flows so that hot water flows through the first flow path 6 .

Further, the control unit 50 adjusts the opening degrees of the first valve 51 and the second valve 52 according to the temperature of the cooling water, thereby controlling the flow rate of the hot water flowing through the first flow path 6 and the second flow path 7 . You may adjust the flow rate of the hot water flowing through or the flow rate ratio of each flow rate. In this case, valves with a flow control function can be used as the first valve 51 and the second valve 52 . The first valve 51 and the second valve 52 may be electromagnetic proportional flow control valves or may be mass flow controllers. When the water temperature of the cooling water is lower than a predetermined target temperature, the control unit 50 may perform control so that the rate of hot water flowing through the first flow path 6 increases as the difference from the target temperature increases.

FIG. 3 is a diagram showing an example of flow paths when heat is not exchanged between the hot water flow path and the cooling water flow path in the first operation mode of the adsorption chiller shown in FIG. FIG. 4 is a diagram showing an example of flow paths when heat is not exchanged between the hot water flow path and the cooling water flow path in the second operation mode of the adsorption chiller shown in FIG.

As shown in FIGS. 3 and 4, in one example, the control unit 50 controls the flow path of the hot water so that the hot water flows through either the first flow path 6 or the second flow path 7 according to the water temperature of the cooling water. switch. Control unit 50 does not need to raise the temperature of the cooling water when the temperature of the cooling water is within the predetermined temperature range. Therefore, when the temperature of the cooling water is within the predetermined temperature range, the control unit 50 may switch the flow path through which hot water flows so that hot water flows through the second flow path 7 .

In the example shown in FIGS. 1 to 4 , the cooling water flow path is through the heat exchanger 40 and the hot water flow path is through the heat exchanger 40 in the first flow path 6 and bypass the heat exchanger 40 in the second flow path. A case of branching into road 7 is shown. However, the hot water flow path may pass through the heat exchanger 40 and the cold water flow path may branch into the first flow path and the second flow path. In this case, the controller 50 controls the flow rate of cooling water flowing through the first path. In one example, the control unit 50 switches the route through which the cooling water flows so that the cooling water flows through either the first route or the second route. Specifically, when the water temperature of the cooling water is lower than a predetermined temperature, the control unit 50 switches the route through which the cooling water flows so that the cooling water flows through the first route.

FIG. 5 is an example of the adsorption isotherm of the adsorbent. In FIG. 5, the horizontal axis indicates relative pressure. The vertical axis indicates the adsorption amount. The relative pressure on the horizontal axis is represented by equilibrium pressure/saturated vapor pressure. Considering that point A in FIG. 5 corresponds to the equilibrium point of the desorption reaction and point B corresponds to the equilibrium point of the adsorption reaction, the region between points A and B is the working pressure range. Then, the difference between the amount of adsorption corresponding to point A and the amount of adsorption corresponding to point B is the amount of water movement (amount of refrigerant movement).

The amount of water transfer means the amount of water transfer in one cycle of adsorption and desorption. As the amount of moisture transferred increases, the cooling performance of the adsorption chiller increases. According to the absorbent material containing the porous body of this example and the composite salt contained in the porous body, as shown in FIG. You can make it bigger.

The position of point A, which is the lower limit of the operating pressure range, is determined by the temperature of the adsorbents 12 and 13 in the desorption process, that is, the temperature of the hot water flowing through the adsorbers 10 and 11 in which the adsorbents 12 and 13 are installed. be. The position of point B, which is the upper limit of the operating pressure range, is determined by the temperature of the adsorbents 12 and 13 in the adsorption step, that is, the temperature of the cooling water flowing through the adsorbers 10 and 11 in which the adsorbents 12 and 13 are installed. be done. As the cooling water temperature decreases, the upper limit of the operating pressure range changes from B to B'. If the relative pressure becomes too high, the salt in the adsorbents 12 and 13 will deliquesce and become an aqueous solution. Depending on the ambient temperature, such as in winter, the temperature of the cooling water may be too low and problems may arise due to salt deliquescence. On the other hand, when the cooling water temperature increases, the adsorption amount decreases.

According to the adsorption chiller 1 of the present embodiment, the heat exchanger 40 is provided to exchange heat between the hot water flow path and the cooling water flow path so that the temperature of the cooling water falls within a predetermined temperature range. It is possible to prevent the temperature of the cooling water from becoming too low, and prevent the salt in the adsorbents 12 and 13 from deliquescing and becoming an aqueous solution. Therefore, stable cooling output can be achieved.

In particular, since at least one of the hot water flow path and the cooling water flow path branches into the first flow path 6 passing through the heat exchanger 40 and the second flow path 7 bypassing the heat exchanger 40, the control unit 50 , the flow rate of hot water or cooling water passing through the heat exchanger 40 can be easily controlled, and the temperature of the cooling water can be controlled with high accuracy. The control unit 50 switches the flow path through which the hot water flows so that the hot water flows through either the first flow path 6 or the second flow path 7 according to the temperature of the cooling water, so that heat exchange is performed from a state in which heat is not exchanged. It is possible to quickly switch to the state where

FIG. 6 is a flow chart showing an example of processing of the adsorption chiller 1 . The control unit 50 acquires cooling water temperature information from the temperature sensor 18 that measures the temperature of the cooling water. The control unit 50 determines whether or not the temperature of the cooling water is lower than the target temperature (step S101). The target temperature may be a predetermined temperature. In one example, the target temperature of the cooling water may be selected from the range of 7° C. to 40° C. according to the characteristics of the adsorbents 12 and 13 . In one example, the target temperature of the cooling water may be any temperature between 10°C and 20°C.

When the temperature of the cooling water is lower than the target temperature (step S101: YES), the control unit 50 switches the hot water flow path so that the hot water flows through the first flow path 6 passing through the heat exchanger 40 ( step S102). The control unit 50 opens the first valve 51 and the third valve 53 provided in the first flow path 6 and closes the second valve 52 provided in the second flow path 7 . On the other hand, when the temperature of the cooling water is equal to or higher than the target temperature (step S101: NO), the hot water switches the path through which the hot water flows so that the hot water flows through the second flow path 7 bypassing the heat exchanger 40 (step S103). As a result, when the temperature of the cooling water is equal to or higher than the target temperature, the temperature of the cooling water is maintained because heat is not exchanged between the hot water channel and the cooling water channel. Therefore, it is possible to prevent a decrease in the amount of refrigerant adsorbed in the adsorption stage due to an increase in the temperature of the cooling water. This prevents the cooling performance from deteriorating.

FIG. 7 is a flow chart showing another example of processing of the adsorption chiller 1 . The control unit 50 acquires cooling water temperature information from the temperature sensor 18 that measures the temperature of the cooling water. The control unit 50 determines whether or not the temperature of the cooling water is lower than the target temperature (step S201). If the temperature of the cooling water is lower than the target temperature (step S201: YES), the control unit 50 controls the first flow rate so that the rate of hot water flowing through the first flow path 6 increases as the temperature of the cooling water decreases. The flow rate of the channel 6 and the flow rate of the second channel 7 are calculated (step S202).

A lookup table or the like indicating the relationship between the flow rate (flow rate ratio) of hot water and the temperature of cooling water in the first flow path 6 and the second flow path 7 may be stored in advance in the memory within the control unit 50 . The control unit 50 may refer to the lookup table to calculate the flow rate (flow rate ratio) according to the temperature of the cooling water.

The control unit 50 adjusts the flow rate of the first channel and the flow rate of the second channel so as to achieve each calculated flow rate (flow rate ratio) (step S203). Specifically, the control unit 50 adjusts the opening degrees of the first valve 51 and the third valve 53 provided in the first flow path 6, and adjusts the opening of the second valve 52 provided in the second flow path 7. You can adjust the opening.

On the other hand, when the temperature of the cooling water is equal to or higher than the target temperature (step S201: NO), the hot water flow path is switched so that the hot water flows through the second flow path 7 bypassing the heat exchanger 40 ( step S204).

According to the processing shown in FIG. 7, the flow rate of the first flow path and the flow rate of the second flow path can be controlled stepwise according to the temperature of the cooling water. Therefore, it is possible to control the temperature of the cooling water with high accuracy.

FIG. 8 is a flow chart showing another example of processing of the adsorption chiller 1 . The controller 50 may control the flow rate of hot water flowing through the first flow path according to the switching timing between the first operation mode and the second operation mode. The control unit 50 determines whether it is time to switch the operation modes of the pair of adsorbers 10 and 11 (step S301). The control unit 50 waits for the switching timing of the operation modes of the pair of adsorbers 10 and 11 (step S301: YES), and executes the processes from step S302 to step S304. The processing from step S302 to step S304 is the same as that from step S101 to step S103 in FIG. Therefore, repetitive description is omitted.

At the timing of switching the operation mode, cooling water will flow through one of the adsorbers through which hot water has been circulating, and warm water will circulate through the other adsorber through which cooling water has been circulating. Become. Therefore, the temperature of the cooling water may change at the switching timing of the operation mode. According to the process of FIG. 8, the flow rate of the hot water flowing through the first flow path is controlled in accordance with the switching timing of the operation mode, so it is easy to cope with the change in the temperature of the cooling water due to the switching of the operation mode.

FIG. 9 is a diagram showing an example of an adsorption chiller according to a second embodiment of the present invention. The adsorption chiller 1 of this embodiment includes a temperature setting unit 60 . The temperature setting section 60 may be provided as one function of the computer. The temperature setting unit 60 sets a predetermined temperature range so that the temperature of the cooling water decreases according to deterioration of the pair of adsorbers 10 and 11 . The temperature setting unit 60 may determine the degree of deterioration of the pair of adsorbers 10 and 11 based on the temperature and flow rate of the cold water 21 cooled by the heat of vaporization generated in the evaporating unit 20 . The temperature setting unit 60 may set the target temperature of the cooling water based on the temperature and flow rate of the cold water 21 cooled by the heat of vaporization generated in the evaporating unit 20 . A temperature sensor 19 may be provided to obtain temperature information of the cold water 21 . A flow meter 41 may be provided for obtaining information on the flow rate of the cold water 21 . Other configurations are the same as those of the adsorption chiller 1 of the first embodiment shown in FIGS. Therefore, repetitive description is omitted.

FIG. 10 is a diagram showing an example of processing of the adsorption chiller 1 shown in FIG. The temperature setting unit 60 acquires the temperature and flow rate of the cold water 21 cooled by the evaporator 20 (step S401). In the first operation mode, the first adsorption device 10 functions as an adsorption section. In the first operation mode, the temperature setting unit 60 determines the degree of deterioration of the adsorbent 12 of the first adsorber 10 based on the temperature and flow rate of the cold water 21 cooled by the evaporator 20 (step S402). Specifically, as the deterioration of the adsorbent 12 of the first adsorber 10 progresses, it becomes difficult to cool the cold water 21, so the temperature of the cold water 21 increases. In addition, as the flow rate of the cold water 21 increases, it becomes more difficult to cool the cold water 21 . In one example, if the actual temperature of the cold water 21 is higher than the target temperature and the difference between the measured temperature and the target temperature is divided by the flow rate, the first It may be determined that the adsorbent 12 of the adsorber 10 has deteriorated.

When the temperature setting unit 60 determines that the adsorbent 12 of the first adsorber 10 has deteriorated (step S402: YES), the temperature setting unit 60 lowers the target temperature range of the coolant temperature in the first operation mode. Set (step S403). By lowering the temperature of the cooling water, the amount of refrigerant adsorbed by the adsorbent 12 can be increased. When the temperature setting unit 60 determines that the adsorbent 12 of the first adsorber 10 has not deteriorated (step S402: NO), the temperature setting unit 60 lowers the target temperature range of the coolant temperature in the first operation mode. Maintain target temperature range without setting.

When the temperature setting unit 60 determines that the adsorbent 13 of the second adsorber 11 has deteriorated (step S404: YES), the temperature setting unit 60 lowers the target temperature range of the coolant temperature in the second operation mode. Set (step S405). By lowering the temperature of the cooling water, the amount of refrigerant adsorbed by the adsorbent 13 can be increased. When the temperature setting unit 60 determines that the adsorbent 13 of the second adsorber 11 has not deteriorated (step S404: NO), the temperature setting unit 60 lowers the target temperature range of the coolant temperature in the second operation mode. Maintain target temperature range without setting.

According to the processing from step S402 to step S405, the temperature setting unit 60 sets a predetermined temperature range so that the temperature of the cooling water decreases according to the deterioration of the pair of adsorbers 10 and 11. FIG. Further, even if there is a difference in the degree of deterioration between one adsorber 10 and the other adsorber 11 , the temperature setting unit 60 determines that the one adsorber 10 is more deteriorated than the other adsorber 11 . If so, the target temperature range for the first operating mode is made lower than the target temperature range for the second operating mode. This makes it possible to correct the difference in the degree of deterioration and realize a stable cooling output.

FIG. 11 is a diagram showing another example of processing of the adsorption chiller 1 shown in FIG. Steps S501, S502 and S504 are the same as steps S401, S402 and S403 of FIG. Therefore, repetitive description is omitted. When the controller 50 determines that the adsorbent 12 of the first adsorber 10 is degraded (step S502: YES), the control unit 50 adjusts the ratio of hot water passing through the first flow path 6 during the first operation mode to Decrease (step S503). In other words, when the controller 50 determines that the adsorbent 12 of the first adsorber 10 is degraded, the controller 50 increases the proportion of hot water passing through the second flow path 7 in the first operation mode. .

When the controller 50 determines that the adsorbent 13 of the second adsorber 11 is degraded (step S504: YES), the control unit 50 adjusts the ratio of hot water passing through the first flow path 6 during the second operation mode to Decrease (step S505). In other words, when the controller 50 determines that the adsorbent 12 of the first adsorber 10 is degraded, the controller 50 increases the ratio of hot water passing through the second flow path 7 in the second operation mode. .

According to the processing from step S502 to step S505, when one adsorber 10 is more deteriorated than the other adsorber 11, the controller 50 controls the The flow rate of hot water is made smaller than the flow rate of hot water flowing through the first flow path in the second operation mode. When the other adsorber 11 is more deteriorated than the one adsorber 10, the control unit 50 changes the flow rate of hot water flowing through the first flow path 6 in the second operation mode to is less than the flow rate of hot water flowing through the first flow path. Such processing also makes it possible to adjust the difference in the degree of deterioration between the adsorbers 10 and 11 .

FIG. 12 is a diagram showing another example of processing of the adsorption chiller 1 shown in FIG. In this example, the control unit 50 adjusts the time of the first operation mode and the time of the second operation mode based on the degree of deterioration of the first adsorber 10 and the degree of deterioration of the second adsorber 11. . Steps S601, S602, and S604 are the same as steps S401, S402, and S404 in FIG. Therefore, repetitive description is omitted. In one example, when the controller 50 determines that the adsorbent 12 of the first adsorber 10 has deteriorated (step S602: YES), it lengthens the time of the first operation mode (step S603). When the controller 50 determines that the adsorbent 13 of the second adsorber 11 is degraded (step S604: YES), it lengthens the time of the second operation mode (step S605). When one of the adsorbers 10 is more deteriorated than the other adsorber 11, the control unit 50 sets the time of the first operation mode in which the one adsorber 10 functions as the adsorber to the other adsorber 11. It is made longer than the time of the second operation mode for functioning as the adsorption part. Conversely, when the other adsorber 11 is more deteriorated than the one adsorber 10, the time of the second operation mode in which the other adsorber 11 functions as the adsorber is It is made longer than the time of the first operation mode functioning as Such processing also makes it possible to adjust the difference in the degree of deterioration between the adsorbers 10 and 11 . In the example shown in FIG. 12, when one of the adsorbers 10 is more deteriorated than the other adsorber 11, the time of the first operation mode in which the one adsorber 10 functions as an adsorption unit is replaced by the other adsorption unit. A case has been described in which the time is set longer than the time in the second operation mode in which the device 11 functions as an adsorption unit. However, the adsorption refrigerator 1 of this example is not limited to this case. When one adsorber 10 is more deteriorated than the other adsorber 11, the control unit 50 makes the time of the first operation mode shorter than the time of the second operation mode to maintain the overall cooling capacity. can be controlled as follows.

FIG. 13 is a diagram showing an example of an adsorption chiller according to the third embodiment of the present invention. In the adsorption chiller 1 shown in FIG. 1, the cooling water output from the cooling water generator 16 is, as shown in FIG. It flows through the four-way valve 14 , the flow path 4 , the first adsorber 10 , the second four-way valve 15 , the condensation section 30 and the cooling water path 3 b and returns to the cooling water generation section 16 . On the other hand, in the adsorption chiller 1 of the present embodiment, as shown in FIG. 40, the first four-way valve 14, the flow path 4, the first adsorber 10, the second four-way valve 15, and the cooling water path 3d, and returns to the cooling water generator 16. These cooling water pump 9, cooling water path 3a, condenser 30, cooling water path 3b, cooling water path 3c, heat exchanger 40, first four-way valve 14, circulation path 4, first adsorber 10, second The four-way valve 15 and the cooling water path 3d form a cooling water flow path through which the cooling water flows. The adsorption chiller 1 of this embodiment has the same structure as the adsorption chiller 1 of the first embodiment except for the cooling water flow path. Therefore, repetitive description of the same configuration will be omitted.

According to this embodiment, the cooling water flow path passes through the heat exchanger 40 after passing through the condenser 30 and before passing through the adsorbers 10 , 11 . As a result, even when the temperature of the cooling water needs to be raised, the cooling water at a temperature before the temperature is raised can be input to the condensation section 30, and the condensation reaction can be performed with high efficiency. As in the case of the first embodiment, the cooling water temperature can be raised to a predetermined target temperature by controlling the flow rate of hot water passing through the first flow path 6 and the like.

FIG. 14 is a diagram showing an example of an adsorption chiller according to a fourth embodiment of the present invention. The adsorption chiller of this embodiment includes a heat storage unit 42 . The heat storage unit 42 temporarily stores heat from hot water flowing through one of the pair of adsorbers 10 and 11 . For example, the heat storage unit 42 is filled with a heat storage material that maintains a predetermined temperature, such as a latent heat storage material. Even when the temperature of the hot water in the hot water channel becomes low, the hot water is heated to the temperature maintained by the heat storage unit 42 by passing through the heat storage unit 42 which maintains the temperature in the heated state. As a result, the hot water can flow into the adsorbers 10 and 11 while maintaining a predetermined temperature. Note that the heat storage unit 42 may be a buffer tank.

The heat exchanger 40 exchanges heat between the hot water channel and the cooling water channel in the heat storage section 42 . Hot water obtained from the hot water main pipe 17 passes through the heat storage unit 42 via the hot water path 2a and the hot water pump 8, as shown in FIG. Hot water that has passed through the heat storage unit 42 flows through the first four-way valve 14 , the flow path 5 , the second adsorber 11 , and the second four-way valve 15 and is discharged to the hot water main pipe 17 .

In this example, in the first operation mode, the cooling water generated by the cooling water generation unit 16 may flow through the cooling water pump 9 and the cooling water path 3a as shown in FIG. The outlet side of the cooling water path 3 a branches into a first flow path 6 and a second flow path 7 . The first flow path 6 is a flow path passing through the heat exchanger 40, and is a so-called bypass flow path. The second flow path 7 is a route bypassing the heat exchanger 40 . A first valve 51 is provided on the input side of the heat exchanger 40 in the first flow path 6 . A third valve 53 is provided on the output side of the heat exchanger 40 in the first flow path 6 . A second valve 52 is provided in the second flow path 7 . In the example shown in FIG. 14, the first valve 51 and the third valve 53 are open and the second valve 52 is closed. Therefore, cooling water flows through the first flow path 6 . As a result, the heat exchanger 40 exchanges heat between the hot water channel and the cooling water channel. The heat exchange raises the temperature of the cooling water. When the temperature of the cooling water is lower than the target temperature range, the control unit 50 opens the first valve 51 and the third valve 53 and closes the second valve 52 so that the cooling water reaches the heat exchanger 40. The flow path of the cooling water can be switched so that it passes through the On the other hand, when the temperature of the cooling water is equal to or higher than the target temperature range, the control unit 50 closes the first valve 51 and the third valve 53 and opens the second valve 52 so that the cooling water heats up. The cooling water flow path can be switched so as not to pass through the exchanger 40 . Other configurations are the same as in the case of the first embodiment. Therefore, repetitive description is omitted.

According to the adsorption chiller 1 of the present embodiment, even when the temperature of the discharged hot water flowing through the hot water main pipe 17 fluctuates, the heat storage section 42 can suppress the temperature fluctuation of the hot water. Since heat exchange can be performed between the hot water channel through which the hot water whose temperature fluctuation is suppressed flows and the cooling water channel, it is possible to stably control the temperature of the cooling water.

FIG. 15 is a diagram showing an example of an adsorption chiller according to a fifth embodiment of the present invention. The adsorption chiller of this embodiment includes a heat storage unit 42 . In the fourth embodiment shown in FIG. 14, hot water obtained from the hot water main pipe 17 passes through the heat storage unit 42 via the hot water path 2a and the hot water pump 8, and is input to the first four-way valve 14. Ta. In contrast, in the adsorption chiller 1 of the present embodiment, the hot water main pipe 17 itself passes through the heat storage section 42 . In other words, the heat storage unit 42 is in direct contact with the hot water main pipe 17 (hot water line) that is the heat source. The hot water path 2 a acquires hot water from the hot water main pipe 17 at a position different from the heat storage unit 42 .

In this example, the hot water includes the hot water main pipe 17, the heat storage unit 42, the hot water main pipe 17, the hot water path 2a, the hot water pump 8, the first four-way valve 14, the circulation path 5, the second adsorber 11, and the second four-way valve 15. , and the hot water main pipe 17 . The hot water main pipe 17, the heat storage section 42, the hot water path 2a, the hot water pump 8, the first four-way valve 14, the flow path 5, the second adsorber 11, and the second four-way valve 15 constitute a hot water path.

In the adsorption chiller 1 of the present embodiment as well, even when the temperature of the discharged hot water flowing through the hot water main pipe 17 fluctuates, the temperature fluctuation of the hot water can be suppressed by the heat storage section 42 . Since heat exchange can be performed between the hot water channel through which the hot water whose temperature fluctuation is suppressed flows and the cooling water channel, it is possible to stably control the temperature of the cooling water.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It is obvious to those skilled in the art that various modifications or improvements can be made to the above embodiments. It is clear from the description of the scope of claims that forms with such modifications or improvements can also be included in the technical scope of the present invention.

The execution order of each process such as actions, procedures, steps, and stages in the devices, systems, programs, and methods shown in the claims, the specification, and the drawings is particularly "before", "before etc., and it should be noted that it can be implemented in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the specification, and the drawings, even if the description is made using "first,""next," etc. for convenience, it means that it is essential to carry out in this order. not a thing
[Item 1]
an evaporator that evaporates the refrigerant;
a pair of adsorbers each provided therein with an adsorbent capable of adsorbing and desorbing the refrigerant according to temperature;
a condensation unit that cools and condenses the refrigerant;
a hot water channel through which hot water flows through one of the pair of adsorbers;
a cooling water flow path through which the cooling water flowing through the other of the pair of adsorbers passes;
a heat exchanger that exchanges heat between the hot water flow path and the cooling water flow path so that the temperature of the cooling water falls within a predetermined temperature range;
Adsorption chiller.
[Item 2]
At least one of the hot water flow path and the cooling water flow path branches into a first flow path passing through the heat exchanger and a second flow path bypassing the heat exchanger,
A control unit that controls the flow rate of the hot water or cooling water flowing through the first flow path,
The adsorption chiller according to Item 1.
[Item 3]
The hot water flow path passes through the heat exchanger after passing through one of the pair of adsorbers,
The adsorption chiller according to item 1 or 2.
[Item 4]
The control unit switches the flow path through which the hot water flows so that the hot water flows through either the first flow path or the second flow path according to the water temperature of the cooling water.
The adsorption chiller according to item 2.
[Item 5]
When the temperature of the cooling water is lower than a predetermined temperature, the control unit switches the flow path through which the hot water flows so that the hot water flows through the first flow path.
The adsorption chiller according to item 4.
[Item 6]
The cooling water flow path passes through the heat exchanger after passing through the condenser section and before passing through the other of the pair of adsorbers,
The adsorption chiller according to any one of Items 1 to 5.
[Item 7]
The adsorption refrigerator has a first operation mode in which one of the pair of adsorbers functions as an adsorption section for adsorbing the refrigerant, and the other adsorber functions as a desorption section for desorbing the refrigerant; A second operation mode in which one of the adsorbers functions as a desorption unit for desorbing the refrigerant and a second operation mode in which the other adsorber functions as an adsorption unit for absorbing the refrigerant is operated so as to be alternately switched,
the adsorbent provided in the adsorbing unit adsorbs the refrigerant evaporated by the evaporating unit;
the refrigerant is desorbed from the adsorbent provided in the desorption portion;
the condensing unit condenses the desorbed refrigerant;
the evaporating unit evaporates the refrigerant condensed by the condensing unit;
The control unit controls the flow rate of the hot water flowing through the first flow path according to the switching timing between the first operation mode and the second operation mode.
The adsorption chiller according to item 2.
[Item 8]
a temperature setting unit for setting the temperature range in the first operation mode to be lower than the temperature range in the second operation mode when the one adsorber is more deteriorated than the other adsorber; prepare
The adsorption chiller according to item 7.
[Item 9]
When the one adsorber is more deteriorated than the other adsorber, the control unit adjusts the flow rate of the hot water flowing through the first flow path in the first operation mode to the second operation mode. less than the flow rate of the hot water flowing through the first flow path when in mode;
The adsorption chiller according to item 8.
[Item 10]
A temperature setting unit that sets the predetermined temperature range so that the temperature of the cooling water decreases according to deterioration of the pair of adsorbers,
The adsorption chiller according to any one of Items 1 to 9.
[Item 11]
The adsorption chiller has a first operation mode in which one of the pair of adsorbers functions as an adsorption section for adsorbing the refrigerant, and the other adsorber functions as a desorption section for desorbing the refrigerant; A second operation mode in which one of the adsorbers functions as a desorption unit for desorbing the refrigerant and a second operation mode in which the other adsorber functions as an adsorption unit for absorbing the refrigerant is operated so as to be alternately switched,
the adsorbent provided in the adsorbing unit adsorbs the refrigerant evaporated by the evaporating unit;
the refrigerant is desorbed from the adsorbent provided in the desorption portion;
the condensing unit condenses the desorbed refrigerant;
the evaporating unit evaporates the refrigerant condensed by the condensing unit;
The adsorption chiller adjusts the time in the first operation mode and the time in the second operation mode based on the degree of deterioration of the one adsorber and the degree of deterioration of the other adsorber.
The adsorption chiller according to item 2.
[Item 12]
Having a heat storage unit that temporarily stores heat of hot water flowing through one of the pair of adsorbers,
The heat exchanger exchanges heat between the hot water channel and the cooling water channel in the heat storage unit.
The adsorption chiller according to any one of items 1 to 11.
[Item 13]
The hot water channel acquires the hot water from a heat source,
The heat storage unit is in contact with the heat source,
13. The adsorption chiller according to item 12.

REFERENCE SIGNS LIST 1 Adsorption chiller 2 Warm water path 3 Cooling water path 4 Distribution path 5 Distribution path 6 First flow path 7 Second flow path 8 Hot water pump 9 Cooling water pump 10 Adsorber 11 Adsorber 12 Adsorbent 13 Adsorbent 14 First four-way valve 15 Second 2 four-way valve 16 Cooling water generator 17 Hot water main pipe 18 Temperature sensor 19 Temperature sensor 20 Evaporator 21 Cold water 30 Condenser 40 Heat exchanger 41 Flow meter 42 Heat storage unit 50 Control unit 51 First valve 52 Second valve 53 Third valve 60 Temperature setting unit

Claims (13)

an evaporator that evaporates the refrigerant;
a pair of adsorbers each provided therein with an adsorbent capable of adsorbing and desorbing the refrigerant according to temperature;
a condensation unit that cools and condenses the refrigerant;
a hot water channel through which hot water flows through one of the pair of adsorbers;
a cooling water flow path through which the cooling water flowing through the other of the pair of adsorbers passes;
a heat exchanger that exchanges heat between the hot water flow path and the cooling water flow path so that the temperature of the cooling water falls within a predetermined temperature range;
a control unit that controls the flow rate of the hot water flowing through the hot water channel or the flow rate of the cooling water flowing through the cooling water channel;
comprising
Adsorption chiller. At least one of the hot water flow path and the cooling water flow path branches into a first flow path passing through the heat exchanger and a second flow path bypassing the heat exchanger,
The control unit controls the flow rate of the hot water or cooling water flowing through the first flow path,
The adsorption refrigerator according to claim 1. The hot water flow path passes through the heat exchanger after passing through one of the pair of adsorbers,
The adsorption chiller according to claim 1 or 2. The control unit switches the flow path through which the hot water flows so that the hot water flows through either the first flow path or the second flow path according to the water temperature of the cooling water.
The adsorption refrigerator according to claim 2. When the temperature of the cooling water is lower than a predetermined temperature, the control unit switches the flow path through which the hot water flows so that the hot water flows through the first flow path.
The adsorption chiller according to claim 4. The cooling water flow path passes through the heat exchanger after passing through the condenser section and before passing through the other of the pair of adsorbers,
The adsorption chiller according to any one of claims 1 to 5. The adsorption refrigerator has a first operation mode in which one of the pair of adsorbers functions as an adsorption section for adsorbing the refrigerant, and the other adsorber functions as a desorption section for desorbing the refrigerant; A second operation mode in which one of the adsorbers functions as a desorption unit for desorbing the refrigerant and a second operation mode in which the other adsorber functions as an adsorption unit for absorbing the refrigerant is operated so as to be alternately switched,
the adsorbent provided in the adsorbing unit adsorbs the refrigerant evaporated by the evaporating unit;
the refrigerant is desorbed from the adsorbent provided in the desorption portion;
the condensing unit condenses the desorbed refrigerant;
the evaporating unit evaporates the refrigerant condensed by the condensing unit;
The control unit controls the flow rate of the hot water flowing through the first flow path according to the switching timing between the first operation mode and the second operation mode.
The adsorption chiller according to any one of claims 2, 4 and 5 . a temperature setting unit for setting the temperature range in the first operation mode to be lower than the temperature range in the second operation mode when the one adsorber is more deteriorated than the other adsorber; prepare
The adsorption refrigerator according to claim 7. When the one adsorber is more deteriorated than the other adsorber, the control unit adjusts the flow rate of the hot water flowing through the first flow path in the first operation mode to the second operation mode. less than the flow rate of the hot water flowing through the first flow path when in mode;
The adsorption chiller according to claim 8. A temperature setting unit that sets the predetermined temperature range so that the temperature of the cooling water decreases according to deterioration of the pair of adsorbers,
The adsorption chiller according to any one of claims 1 to 9. The adsorption refrigerator has a first operation mode in which one of the pair of adsorbers functions as an adsorption section for adsorbing the refrigerant, and the other adsorber functions as a desorption section for desorbing the refrigerant; A second operation mode in which one of the adsorbers functions as a desorption unit for desorbing the refrigerant and a second operation mode in which the other adsorber functions as an adsorption unit for absorbing the refrigerant is operated so as to be alternately switched,
the adsorbent provided in the adsorbing unit adsorbs the refrigerant evaporated by the evaporating unit;
the refrigerant is desorbed from the adsorbent provided in the desorption portion;
the condensing unit condenses the desorbed refrigerant;
the evaporating unit evaporates the refrigerant condensed by the condensing unit;
The control unit adjusts the time of the first operation mode and the time of the second operation mode based on the degree of deterioration of the one adsorber and the degree of deterioration of the other adsorber.
The adsorption chiller according to any one of claims 1 to 6 . Having a heat storage unit that temporarily stores heat of hot water flowing through one of the pair of adsorbers,
The heat exchanger exchanges heat between the hot water channel and the cooling water channel in the heat storage unit.
The adsorption chiller according to any one of claims 1 to 11. The hot water channel acquires the hot water from a heat source,
The heat storage unit is in contact with the heat source,
The adsorption chiller according to claim 12.

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