JP5443333B2 - Adsorption heat pump - Google Patents

Description

  The present invention relates to an adsorption heat pump.

  Conventionally, an adsorption heat pump system using sunlight has already been proposed (see, for example, Patent Document 1). In such an adsorption heat pump system, an adsorber and an evaporator are connected by piping or the like to form a system isolated from the external space. Adsorption / desorption by an adsorbent built in the adsorber is performed in the system. Then, condensation and vaporization are performed by an evaporator.

JP-A-2005-257140

  However, in the case of the conventional adsorption heat pump system, depending on the structure of the adsorber, considerable heat is transferred from the inside of the adsorber to the outside in parallel with the temperature inside the adsorber rising due to sunlight receiving the sunlight. I sometimes escaped.

  Therefore, when such an adsorber is used, the internal adsorbent cannot always be heated efficiently, and adsorption / desorption by the adsorbent is not performed efficiently, which is the performance of the adsorption heat pump system. It was one factor that hindered improvement.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide an adsorption heat pump including an adsorber capable of heating the adsorbent enclosed therein more efficiently than before. .

Hereinafter, the configuration employed in the present invention will be described.
The adsorption heat pump according to claim 1 has a cylindrical outer container having a cross-section through which light can pass, and an inner container having a cylindrical cross-section through which light can be transmitted, A heat-insulating space in a vacuum state is formed between the outer surface of the inner container and the inner surface of the outer container, and the temperature of the atmosphere and the adsorption contained in the atmosphere are formed inside the inner container. Depending on the partial pressure of the quality, the adsorbate is adsorbed from the atmosphere, or the adsorbent that has already adsorbed is adsorbed to the atmosphere as a part or all of the unadsorbed adsorbent. An adsorber in which colored silica gel particles with coloring capable of promoting absorption are enclosed, and at least a channel through which gas can flow are communicated with the inside of the inner container, and the adsorbate is the colored silica gel. Under the condition of being adsorbed by particles While the adsorbate in a liquefied state is evaporated inside, the adsorbate desorbed from the colored silica gel particles condenses, and an evaporator that collects the condensed adsorbate, and the adsorption in the evaporator In a situation where the temperature in the evaporator decreases as the quality evaporates, by performing heat exchange with the evaporator, cold heat acquisition heat exchange means for taking out cold heat from the evaporator ; Light reflecting means for irradiating the reflected light toward the colored silica gel in the center of the inner container, and the colored silica gel particles are emitted directly from the inner container or by the light reflecting means. The irradiated light has transparency higher than that reaching the colored silica gel in the center of the inner container .

  In the adsorption heat pump configured as described above, the adsorber is installed in a place where sunlight can be received during the day. When sunlight is applied to the adsorber, the sunlight passes through the outer container and reaches the inner container, and the adsorbent enclosed in the inner container is heated.

  In addition, in this adsorber, a heat-insulating space in a vacuum state is formed between the outer container and the inner container, so that the inner container itself is not exposed to the outside air, and is exposed to the outside of the inner container. It is possible to suppress the escape of heat. Therefore, since the temperature in the inner container rises efficiently, the adsorbent can be efficiently regenerated.

  On the other hand, the evaporator is set in an installation state in which the temperature of the adsorber is not as high as that of the adsorber, for example, an installation state in which the normal temperature can be maintained even when the adsorber is heated to high temperatures. More specifically, the evaporator is installed, for example, in a shaded place so as not to receive sunlight during the day. Moreover, in order to prevent the heat from the adsorber whose temperature has risen from being transmitted to the evaporator by heat conduction or convection, for example, the adsorber and the evaporator are installed at a sufficiently distant location. Furthermore, if necessary, a means for promoting heat dissipation (for example, a radiator for exchanging heat with ambient air at room temperature) may be provided between the adsorber and the evaporator.

  The evaporator contains an adsorbate that is liquid at room temperature and also vaporizes to some extent. The inside of the system from the adsorber to the evaporator through the flow path is evacuated using, for example, a vacuum pump, and gas components other than the adsorbate are removed out of the system.

  Accordingly, the adsorbate in the evaporator is vaporized according to the vapor pressure in the system, and the vaporized adsorbate is adsorbed by the adsorbent in the adsorber. Further, as a result of such adsorption, the vapor pressure in the system decreases, so that the adsorbate in the evaporator further vaporizes, and these phenomena continue until the adsorbate in the system reaches an equilibrium state. Will happen.

  When the adsorber is irradiated with sunlight in a state where the system has reached an equilibrium state, the temperature of the adsorbent rises, and the adsorbate that has already been adsorbed on the adsorbent is desorbed from the adsorbent, The vapor pressure inside increases. However, since the temperature inside the flow path and evaporator outside the adsorber is lower than that inside the adsorber, the adsorbate is condensed and liquefied inside the flow path and evaporator outside the adsorber, and the liquefied adsorbate is Accumulate in the evaporator.

  On the other hand, at night, the adsorber is no longer irradiated with sunlight, and heat is released from the adsorbent by heat radiation, and the adsorbent adsorption capacity recovers as the adsorbent temperature decreases. The adsorbate that has been vaporized in is adsorbed by the adsorbent in the adsorber. Further, with such adsorption, the adsorbate in the evaporator is also vaporized. As a result, the heat of vaporization is lost in the evaporator, and the temperature in the evaporator is lowered.

From the evaporator thus lowered in temperature, the cold heat is taken out by the heat exchange means for cold heat acquisition, whereby the object to be cooled can be cooled. Specifically, for example, when the object to be cooled is indoors, cooling can be performed by sending the cold air taken out by the heat exchange means for obtaining cold energy into the room.
Further, when the adsorber is irradiated with sunlight, the sunlight passes through the outer container and then also passes through the inner container, and the adsorbent is directly irradiated with sunlight. Therefore, the adsorbent itself is less than the structure where sunlight does not directly hit the adsorbent (for example, the opaque inner container enclosing the adsorbent is irradiated with sunlight and the heat of the inner container is transferred to the adsorbent). Can be efficiently heated.
In addition, when sunlight passes through the inner container, the sunlight is irradiated on the colored silica gel particles as described above. Therefore, compared with the case where uncolored silica gel particles are irradiated with sunlight, absorption of sunlight is promoted in the inner container, and the adsorbent can be heated more efficiently in the inner container. .
Since the light reflected by the light reflecting means is radiated to the adsorber, the adsorbent can be heated more strongly in the inner container as compared with the case where the light reflecting means equivalent is not provided. .
Compared to the case where uncolored silica gel particles are irradiated with sunlight, the inner container absorbs sunlight.
Yield is promoted. Moreover, compared with the case where sunlight is irradiated to opaque colored silica gel particles, the sunlight also reaches another silica gel particle in a deeper position in the sunlight irradiation direction, and this other silica gel particle is also heated. Will be encouraged. Therefore, the adsorbent can be heated even more efficiently in the inner container.

  The adsorption heat pump according to claim 2 is the adsorption heat pump according to claim 1, wherein the adsorbate is desorbed as the adsorbent is heated in the adsorber. It is characterized by comprising heat exchange means for obtaining heat by taking out heat from the flow path by performing heat exchange on the flow path leading to the evaporator.

  According to the adsorption heat pump configured as described above, it is possible to take out the heat during the day and heat the object to be heated. Specifically, for example, if the heating target is tap water, the tap water that has been heated to become hot water can be supplied to a place (for example, a bathtub) where hot water supply is required.

The adsorption heat pump according to claim 3 is the adsorption heat pump according to claim 1 or 2, wherein the colored silica gel particles are black translucent silica gel particles colored with a black colorant.

  According to the adsorption heat pump configured as described above, when sunlight passes through the inner container, the sunlight is irradiated onto the black translucent silica gel particles as described above. When such semitransparent silica gel particles are irradiated with sunlight, part of the sunlight is absorbed by the black translucent silica gel particles, and another part is transmitted through the black translucent silica gel particles, The silica gel particles are irradiated.

It is a figure which shows schematic structure of an adsorption heat pump, (a) is explanatory drawing which shows the state in the daytime, (b) is explanatory drawing which shows the state at night. It is a figure which shows an adsorption device, (a) is sectional drawing about the cut surface parallel to the longitudinal direction of an adsorption device, (b) is sectional drawing about the cut surface perpendicular | vertical to the longitudinal direction of an adsorption device. It is a figure which shows the adsorption machine of a structure different from the adsorption machine shown in FIG. 2, (a) is sectional drawing about a cut surface parallel to the longitudinal direction of an adsorption machine, (b) is perpendicular | vertical to the longitudinal direction of an adsorption machine. Sectional drawing about various cut surfaces. It is a figure which shows the example from which the position of an adsorption machine and piping differs, (a) is explanatory drawing which shows the example where piping is connected to the lower end side of an adsorption machine, (b) is piping connected to the upper end side of an adsorption machine Explanatory drawing which shows the example made. The graph which shows the performance test result of an adsorption heat pump (the 1). The graph which shows the performance test result of an adsorption heat pump (the 2). The graph which shows the performance test result of an adsorption heat pump (the 3).

Next, embodiments of the present invention will be described with specific examples.
[Adsorption heat pump structure]
The adsorption heat pump 1 described below includes a plurality (five in FIG. 1) of adsorbers 2 and evaporators 3 as shown in FIG. 1A and FIG. Are connected via a pipe 5.

  The adsorber 2 is installed in a place that receives sunlight during the day (for example, on the roof, in the garden, on the south side of the house, etc.). Further, the adsorber 2 is provided with a reflection condensing plate 6 whose surface facing the adsorber 2 is a mirror surface, and the sunlight reflected by the reflection condensing plate 6 is also irradiated toward the adsorber 2. It is configured as follows.

  The evaporator 3 is installed in a place (for example, the attic, the basement, the north side of a house, etc.) that is maintained at substantially normal temperature. The evaporator 3 is provided with a heat exchange flow path 7 for obtaining cold heat for exchanging heat with the evaporator 3. As will be described in detail later, heat exchange with the heat exchange flow path 7 for obtaining cold heat is performed at night. The cold heat can be taken out from the evaporator 3 by circulating the working medium.

  The pipe 5 is provided with a heat exchange channel 8 for heat acquisition for exchanging heat with the pipe 5, and will be described in detail later. However, during the day, the heat exchange medium 8 is connected to the heat exchange channel 8 for heat acquisition. Can be taken out from the pipe 5 by circulating the gas. Further, an exhaust valve 9 is provided in the middle of the pipe 5, and vacuuming can be performed through the exhaust valve 9.

[Adsorber structure (part 1)]
As shown in FIGS. 2A and 2B, the adsorber 2 includes a glass transparent outer container 11 and a glass transparent inner container 12 provided inside the outer container 11. It is made into the structure which has. Although the length and diameter of the outer container 11 are arbitrary, the diameter is practically about 0.5 cm to 30 cm, preferably about 3 cm to 10 cm.

  Between the inner surface of the outer container 11 and the outer surface of the inner container 12, a heat insulating space 13 in a vacuum state is formed. When such a heat insulating space 13 is formed, the heat inside the inner container 12 becomes difficult to escape to the outside of the outer container 11, so that when the sunlight is received, the inside of the inner container 12 is efficiently heated. Can do.

  Further, the inner container 12 adsorbs the adsorbate from the atmosphere or desorbs the adsorbate that has already been adsorbed into the atmosphere according to the temperature of the atmosphere and the partial pressure of the adsorbate contained in the atmosphere. The adsorbent 15 is sealed.

  In this embodiment, as the adsorbent 15, black translucent silica gel constituted by adding carbon black to silica gel is employed. This black translucent silica gel has excellent adsorption capability at low humidity, and its characteristics are considered to be similar to A type silica gel.

  The term “translucent” as used herein refers to the ratio of sunlight to the silica gel that is not added with carbon black, and the transparency is such that the ratio is less than 100%. However, suitable transparency may vary depending on the amount of the adsorbent 15 and the like.

  For example, when the amount of the adsorbent 15 is large in the traveling direction of sunlight, the sunlight can reach more adsorbent particles by increasing the transparency. On the other hand, when the amount of the adsorbent 15 in the traveling direction of sunlight is small, the absorption rate of sunlight by the adsorbent 15 can be improved by reducing the transparency.

  Therefore, the transparency should be adjusted in consideration of these balances. Practically, for example, the solar light transmittance is about 20% to 80% (that is, light of about 80% to 20% is absorbed) at a ratio to the solar light transmitted through the silica gel to which no carbon black is added. ) Is preferably adjusted as follows.

  In the case of the present embodiment, as shown in FIG. 2B, sunlight is directly applied to the adsorber 2, and sunlight reflected by the reflective light collector 6 is also applied to the adsorber 2. Therefore, it is preferable to set the transparency so that these lights reach the adsorbent 15 in the center of the inner container 12.

  Incidentally, in the present embodiment, the black translucent silica gel is a spherical one having an average particle diameter of 3 mm. The particle size of the adsorbent 15 is preferably a particle size that allows a gap that allows the adsorbate vapor to flow smoothly even when the adsorber 2 is filled. The particle diameter may be about 0.1 mm to 10 mm, preferably about 1 mm to 4 mm. In addition to spherical adsorbent particles, crushed adsorbent particles may be used.

  A filter 17 made of a porous material such as a wire mesh or sponge is disposed inside the inner container 12, and the filter 17 prevents the adsorbent 15 from spilling down to the pipe 5 side. A glass tube 18 is fixed to the outer container 11 and the inner container 12, and a pipe 5 (a copper tube in this embodiment) is connected to the glass tube 18.

  In the case of the adsorber 2 having the above-described structure, since the outer container 11 and the inner container 12 are both transparent made of glass, sunlight can be transmitted into the inner container 12, and the adsorbent 15 Can be directly heated by sunlight.

  The inner container 12 may be an opaque container (for example, a metal container or a glass container on which a metal film is deposited). In this case, the inner container 12 itself is heated by sunlight, The heat is transferred to the adsorbent 15. However, since it is more efficient that the adsorbent 15 can be directly heated by sunlight, it is preferable from the viewpoint that the inner container 12 has light permeability and the adsorbent 15 has light absorption.

[Adsorber structure (part 2)]
Instead of the above-described adsorber 2, an adsorber 20 as shown in FIGS. 3A and 3B may be employed. This adsorber 20 also has a glass outer container 11 and an inner container 12 similar to those of the adsorber 2, and has a structure in which an adsorbent 15 is sealed inside the inner container 12.

  However, the glass tube 22 having a different form from the glass tube 18 included in the adsorber 2 described above is provided, and specifically, the glass tube 22 is configured to penetrate the filling region of the adsorbent 15. . In such a configuration, when the adsorbate vapor desorbed when the adsorbent 15 is heated rises in the inner container 12, the vapor smoothly flows into the glass tube 22, and the adsorption is performed. Exhaust from the vessel 20 can be encouraged.

  Further, since the glass tube 22 having such a configuration is provided, unlike the above-described adsorber 2, the adsorbent 15 does not spill down to the pipe 5 side even if the filter 17 equivalent is not provided. . Therefore, the pressure loss can be reduced as much as the filter 17 does not exist, and the exhaust from the adsorber 20 can be promoted also in this respect.

  Furthermore, a through hole penetrating from the outer peripheral side of the glass tube 22 to the inner peripheral side may be formed in the glass tube 22. In the case where such a through hole is provided, the diameter of the through hole is made smaller than the particle diameter of the adsorbent 15 so that the adsorbent 15 does not fall down to the inner peripheral side of the glass tube 22. Alternatively, as long as the opening of the through hole is covered with a filter made of a breathable material such as a net or a nonwoven fabric, the diameter of the through hole itself may be larger than the particle diameter of the adsorbent 15.

  If such a through hole is provided, the adsorbate vapor desorbed when the adsorbent 15 is heated can flow from the outer peripheral side of the glass tube 22 to the inner peripheral side through the through hole. Therefore, the adsorbate vapor flows into the glass tube 22 more smoothly.

  Incidentally, in addition to providing a through hole in the glass tube 22 as described above, a tube body may be formed of a net-like material, and such a net-like tube body may be provided in place of the glass tube 22. The same effect as when a through hole is formed in the glass tube 22 can be expected.

[Positional relationship between adsorber and piping]
In the above description, the positional relationship between the adsorbers 2 and 20 and the pipe 5 is based on the premise that the pipe 5 is connected to the lower end side of the adsorbers 2 and 20 as illustrated in FIG. However, as illustrated in FIG. 4B, the pipe 5 may be connected to the upper ends of the adsorbers 2 and 20.

  If the pipe 5 is connected to the upper ends of the adsorbers 2 and 20 in this way, the adsorbent 15 does not spill down to the pipe 5 side, and in this case, the filter 17 is not required in the adsorber 2 as well. Become.

4 (a) and 4 (b) show an example in which the longitudinal direction of the adsorbers 2 and 20 is oriented obliquely up and down, but the longitudinal directions of the adsorbers 2 and 20 are arranged in the horizontal direction. May be.
[Operation status of adsorption heat pump]
In the adsorption heat pump 1 configured as described above, the evaporator 3 is filled with an adsorbate that becomes liquid at room temperature and vaporizes to some extent. In the case of the present embodiment, the adsorbate is configured to use water, but may be a substance other than water, such as alcohol, ammonia, and other various hydrocarbons that become liquid at room temperature. Can be used.

  A vacuum pump or the like (not shown) is connected to the pipe 5 via the exhaust valve 9 to perform evacuation, and from this, the adsorption from the system from the adsorbers 2 and 20 to the evaporator 3 via the pipe 5 is absorbed. Gas components other than quality are removed.

  When evacuation is performed, the adsorbate in the evaporator 3 is vaporized according to the vapor pressure in the system, and the vaporized adsorbate is adsorbed by the adsorbent 15 in the adsorbers 2 and 20. It will be. Further, as a result of such adsorption, the vapor pressure in the system is lowered, so that the adsorbate in the evaporator 3 is further vaporized, and these phenomena are continuously observed until the inside of the system reaches an equilibrium state. Will happen.

  In this state, sunlight is irradiated on the light receiving surfaces of the adsorbers 2 and 20 during the daytime, and thereby the temperature of the adsorbent 15 rises. When the adsorbent 15 is heated, the adsorbate is desorbed from the adsorbent 15, and high temperature and high humidity gas is discharged from the adsorbers 2 and 20.

  At this time, when a heat exchange medium such as tap water is circulated through the heat exchange channel 8 for acquiring heat, hot water can be obtained from the heat exchange channel 8 for acquiring heat. It is preferable that such warm water is once stored in a heat retaining tank so that hot water can be supplied when necessary.

  Further, when such hot water is unnecessary, heat may be taken from the pipe 5 by air blowing or natural heat dissipation. In any case, since the temperature in the pipe 5 is lowered, the adsorbate is condensed in the pipe 5, and the condensed water flows into the evaporator 3.

  On the other hand, at night, the adsorbers 2 and 20 are no longer irradiated with sunlight, and further, the adsorbent 15 is radiated by heat radiation, and the adsorbing capacity of the adsorbent 15 is restored accordingly. The adsorbate vaporized inside is adsorbed by the adsorbent 15 in the adsorbers 2 and 20.

  Also, with such adsorption, the adsorbate in the evaporator 3 is also vaporized. As a result, the heat of vaporization is deprived in the evaporator 3, and the temperature in the evaporator 3 is lowered. In the case of the form, the temperature in the evaporator 3 reaches a temperature range below freezing point.

  At this time, if the heat exchange medium is circulated through the heat exchange flow path 7 for cold heat acquisition, the cold heat can be taken out from the evaporator 3 at a low temperature. Can be cooled.

[Experimental Example 1]
A performance test of the adsorption heat pump 1 was performed. In Experimental Example 1, the outer container 11 having a diameter of 50 mm × length 50 cm, the inner container 12 having a diameter of 38 mm was used, and the reflection condensing plate 6 having a light receiving area of 25 × 60 cm was used. The adsorbent 15 was filled with 420 ml of black translucent silica gel particles (307 g), and a far red heater (500 W, installed at a distance of 30 cm from the light receiving surface) was used as a heating source.

  Then, heating with a far-red heater is performed to simulate a time zone corresponding to the daytime, heating is stopped to simulate a time zone corresponding to nighttime, and the temperature of each part of the adsorption heat pump 1 is measured over 24 hours. did. The result is shown in FIG.

  As is apparent from the graph shown in FIG. 5, the temperature inside the adsorber 2 rises and accumulates in the evaporator 3 during a time period corresponding to the daytime (a time period when heating with the far-red heater is performed). The maximum amount of water was also reached. From this, it can be seen that water as an adsorbate is desorbed from the adsorbent 15 and the water vapor is accumulated in the evaporator 3 as condensed water.

  On the other hand, when the heating with the far-red heater was stopped, the temperature inside the adsorber 2 dropped rapidly thereafter. At this time, the temperature in the evaporator 3 also decreased, and the temperature in the evaporator 3 reached a temperature range below the air temperature. That is, in the time zone corresponding to the nighttime (the time zone in which the heating with the far red heater is stopped), if the cold heat in the evaporator 3 is taken out using the heat exchange flow path 7 for obtaining cold heat, the nighttime cooling or the like Can be used.

[Experiment 2]
The adsorption heat pump 1 similar to the experimental example 1 was actually installed outdoors, and the temperature of each part of the adsorption heat pump 1 was measured over 24 hours. The result is shown in FIG.

  After sunset, the temperature in the evaporator 3 gradually decreased and finally reached below freezing point. Therefore, if the cold heat in the evaporator 3 is taken out by using the heat exchange flow path 7 for cold heat acquisition, it can be used for cooling at night.

[Experiment 3]
An adsorption heat pump 1 similar to that in Experimental Example 1 was actually installed outdoors, and the center temperature and the surface temperature of the adsorber 2 were measured with thermocouples. The result is shown in FIG.

  The surface temperature of the adsorber 2 is heated only to about 40 ° C. by sunlight, but the central temperature of the portion filled with the adsorbent 15 has increased to nearly 90 ° C. At this time, the water level in the evaporator 3 also rises. From these facts, it was confirmed that the adsorbate 15 was desorbed from the adsorbent 15 and the adsorbent 15 was regenerated well. .

  Further, when the center temperature and the surface temperature of the adsorber 2 were lowered, the temperature of the evaporator 3 was also lowered, and the state of approximately 0 ° C. was maintained for a long time. Therefore, if the cold heat in the evaporator 3 is taken out by using the heat exchange flow path 7 for cold heat acquisition, it can be used for cooling at night.

[Modifications, etc.]
As mentioned above, although embodiment of this invention was described, this invention is not limited to said specific one Embodiment, In addition, it can implement with a various form.

  For example, although the example which uses a black translucent silica gel particle as the adsorbent 15 was shown in the said embodiment, you may use a more general transparent silica gel particle. Alternatively, translucent silica gel particles may be formed by blending alumina instead of carbon black.

  Further, an adsorbent other than silica gel may be used. For example, adsorbent particles such as FSM (Toyota Chuken), mesoporous silica, zeolite, activated carbon, and alumina can also be used. However, sufficient transparency cannot be ensured depending on the material of the adsorbent. In this case, it is preferable to reduce the filling diameter (the diameter of the inner container 12) to improve the heat absorption and radiation characteristics.

  DESCRIPTION OF SYMBOLS 1 ... Adsorption heat pump, 2,20 ... Adsorber, 3 ... Evaporator, 5 ... Pipe, 6 ... Reflection light-condensing plate, 7 ... Heat exchange flow path for cold energy acquisition, 8・ ・ ・ Heat exchange channel for heat acquisition, 9 ... Exhaust valve, 11 ... Outer container, 12 ... Inner container, 13 ... Heat insulation space, 15 ... Adsorbent, 17 ... Filter, 18, 22 ... Glass tube.

Claims (3)

A cross section through which light can be transmitted has a cylindrical outer container, and the outer container is provided with a cross section through which light can be transmitted. The outer surface of the inner container and the outer container A heat-insulating space in a vacuum state is formed between the inner surface, and the inside of the inner container has the atmosphere according to the temperature of the atmosphere and the partial pressure of the adsorbate contained in the atmosphere. The adsorbate is adsorbed from the inside, or the adsorbent that has already adsorbed is colored to promote the absorption of light as compared with the case where part or all of the adsorbent is uncolored. An adsorber filled with colored silica gel particles;
The adsorbate that is in a liquefied state is evaporated in a state where it communicates with the inside of the inner container through at least a flow path through which gas can flow and the adsorbate is adsorbed by the colored silica gel particles. On the other hand, in a situation where the adsorbate desorbed from the colored silica gel particles condenses, an evaporator for recovering the condensed adsorbate,
In the situation where the temperature in the evaporator decreases as the adsorbate evaporates in the evaporator, heat is exchanged with the evaporator to obtain cold energy from the evaporator. Heat exchange means ,
A light reflecting means for irradiating the reflected light toward the colored silica gel in the center of the inner container;
With
The colored silica gel particles have transparency higher than that of the light directly irradiated on the inner container or the light irradiated by the light reflecting means reaching the colored silica gel in the center of the inner container. Adsorption heat pump characterized by that. In a situation where the adsorbate is desorbed as the adsorbent is heated in the adsorber, heat exchange is performed on the flow path from the adsorber to the evaporator, thereby removing the adsorbate from the flow path. The adsorption heat pump according to claim 1, further comprising: a heat exchange means for obtaining heat to obtain heat. The adsorption heat pump according to claim 1 or 2, wherein the colored silica gel particles are black translucent silica gel particles colored with a black colorant.