JPH0325259A - Operation method of adsorption type refrigerator - Google Patents

Abstract

PURPOSE:To promote the capacity of an overall system by a method wherein at the change-over time between an adsorption stroke and a regeneration stroke, respective heat exchangers for operating medium of respective adsorption refrigeration units are changed over to an adsorption stroke or a regeneration stroke in step with their actual operating modes. CONSTITUTION:At the change-over time from an adsorption stroke to a regeneration stroke, fluid supplied to connectors in series of respective heat exchangers 2A, 2B, 2C... with adsorbent is changed and following that, after the elapse of a fixed time, respective heat exchangers 3A, 3B, 3C... for working fluid carrying out the adsorption stroke till then are changed over to carry out the regeneration stroke in turns starting with an exchanger on the upper stream side of the heating fluid F4. At the change-over time from the regeneration stroke to the adsorption stroke, fluid supplied to the connectors in series of respective heat exchangers 2 is changed and following that, after the elapse of a fixed time, respective heat exchangers 3A, 3B, 3C... carrying out the regeneration stroke till then are changed to carry out the adsorption stroke in turns from the exchanger near the upper course of the cooling fluid F5. Thereby, the capacity of an overall system can be promoted.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a system for storing a cooling fluid or a heating fluid in a closed container filled with a working medium that changes phase between a gas phase and a liquid phase. an adsorbent-equipped heat exchanger that absorbs the working medium when receiving a cooling fluid and discharges the working medium when receiving a heating fluid; and a working medium produced by the adsorbent-equipped heat exchanger. and a working medium heat exchanger that exchanges heat with the working medium as the working medium is adsorbed and released, thereby causing an evaporation or condensation action in the working medium. The present invention relates to a method of operating an adsorption refrigeration apparatus configured to utilize generated cold heat as a cooling heat source.

FIG. 9 shows a basic system diagram of the adsorption refrigeration apparatus as described above. The basic cycle of the adsorption refrigeration system will be explained using FIG. 9. In FIG. 9, reference numeral 1 is a closed container, and inside the closed container, there is a gas that changes phase between the gas phase and the gaseous phase. , for example, is filled with a working medium W such as water. Furthermore, two types of heat exchangers 2 and 3 are built into the closed container 1. One heat exchanger 2 is an adsorbent-equipped island exchanger equipped with an adsorbent 12 such as zeolite 1, which adsorbs or releases the gaseous working medium Wg depending on the temperature of the supplied fluid. The other heat exchanger 3 is
A heat exchanger for a working medium that exchanges heat with the working medium W, receives cold heat from the working medium W when the working medium W evaporates, and cools the working medium W when the working medium W is condensed.
It shows an IA device.

In one of the adsorbent heat exchangers 2, in response to switching of the valves 42 and 43, a bomb 4l is used to cause the adsorption action of the working medium W on the adsorbent l2 of the adsorbent heat exchanger 2. A cooling fluid F or a heating fluid F for causing the adsorbent 12 to release the working medium W is supplied,
The other working medium heat exchanger 3 includes a valve 62 and a valve 62.
3, the pump 61 evaporates the liquid working medium Wff when the working medium is adsorbed by the adsorbent and receives cooling heat from the working medium W at the time of evaporation. Alternatively, a condensing fluid F is supplied which acts to cool the gaseous working medium Wg released from the adsorbent l2 and condense the working medium Wg. In FIG. 9, reference numeral 4 indicates a heating fluid F. 5 is a heating fluid supply source (for example, high-temperature heating oil, boiler waste water, solar water heater, etc.) for supplying cooling fluid F5 to the adsorbent heat exchanger 2. The reference numeral 6 indicates a cold energy utilization device (for example, an indoor heat exchanger for air conditioning) for cooling the fluid F to be cooled by using the cold heat received from the working medium W. 7 is a condensing fluid supply source (for example, an outdoor heat source for air conditioning exchanger) is shown.

This adsorption refrigeration system works as follows.

That is, the cooling fluid F for the adsorbent heat exchange gain 2,
When the adsorbent l2 of the adsorbent heat exchanger 2 is in the adsorption process of adsorbing the gaseous working medium Wg due to the supply of
As the working medium is adsorbed, the liquid working medium WI2 is continuously evaporated to lower the temperature of the working medium W1,
The fluid thereby supplied to the working medium heat exchanger 3 (
Cool the fluid to be cooled) F. This cooled fluid F6 to be cooled is used as a cold heat source for air conditioning or the like.

Next, when the adsorption stroke of the working medium W in the absorbent 12 of the adsorbent heat exchanger 2 continues for a certain period of time, the adsorption stroke is ended, and then the adsorbent is A heating fluid F is supplied to the so-called heat exchanger 2 instead of the cooling fluid F that was previously used. When the adsorbent 12 of the heat exchanger with adsorbent 2 is thereby heated, the working medium W adsorbed in the η absorber l2 is released, and the suction absorber 12 moves to a regeneration process. In order to condense the gaseous working medium Wg released from the adsorbent l2 in this regeneration process, a valve 6 is connected to the working medium heat exchanger 3.
2.63, the condensing fluid F is supplied instead of the fluid to be cooled F6 (for example, from the outdoor heat exchanger 7 for air conditioning). As a result, the gaseous working medium Wg The condensation of the adsorbent 12 is promoted, and the working medium is continuously released from the adsorbent 12 of the adsorbent heat exchanger 2 (regeneration of the adsorbent 12). Then, the system is switched to the adsorption process again, and thereafter the adsorption process and the regeneration process are alternately repeated.

(Prior art) Adsorption refrigeration equipment as described above has been known for a long time.
Furthermore, it is also known to connect several units of such adsorption refrigeration devices to obtain a large-scale refrigeration capacity. At that time, if you are trying to reduce the number of system configuration devices connected to multiple adsorption refrigeration units, each adsorbent heat exchanger and each operating unit in those multiple adsorption refrigeration units The medium heat exchangers will be connected in series (for example, as disclosed in Japanese Patent Application Laid-Open No. 63-4635).
(See Publication No. 6).

In this type of adsorption refrigeration system, when the adsorbent-equipped heat exchanger receives cooling fluid, it adsorbs the gas phase working medium, and the liquid phase working medium in the closed container evaporates. The cooling effect is achieved by using the heat of evaporation to cool the fluid flowing in the other heat exchanger, so the adsorption effect of the working medium in the adsorbent heat exchanger slows down or stops ( In other words, if the adsorbent-equipped heat exchanger is in a saturated state, it is necessary to supply a heating fluid (or a working medium discharge fluid) to the adsorbent heat exchanger instead of the cooling fluid.

By the way, when a fluid for cooling or heating the adsorbent is supplied to each heat exchanger with adsorbent connected in series in a plurality of suction type refrigeration units, the difference between the cooling fluid and the heating fluid is The switching timing does not necessarily coincide with the actual switching timing of the adsorption or regeneration action of the adsorbent in each of the plurality of adsorption refrigeration units. In other words, even if the cooling fluid or heating fluid is switched for each adsorbent heat exchanger connected in series, each adsorbent heat exchanger'f
Due to the heat capacity of IAu, not all adsorption refrigeration units actually switch from the adsorption process to the regeneration process or from the regeneration process to the adsorption process at the same time (some adsorption refrigeration units temporarily switch even during the adsorption process). In other adsorption refrigeration units, there is a period of operation time during which the regeneration process is in progress).

In FIG. 10, the adsorbent 12 in FIG. 9 is divided into lO to measure point P. -P,. and set each measurement point P0 to P,.

2 is a graph showing the results of measuring how the water content of an adsorbent changes in According to this graph, even when switching from the regeneration process to the adsorption process, the water content does not start to rise instantly at each measurement point;
As the measuring point moves downstream (po → p.), the actual conversion to the adsorption process (increase in water content) is delayed, and for a while the adsorbent regeneration effect (decreasing in water content), which is the effect of the previous process, is delayed. ) is shown to continue. This phenomenon is the same when switching from the adsorption process to the regeneration process, and the closer the measurement point is to the downstream side of the heating fluid F (P, .
), it has been shown that substantial conversion to the regeneration process (reduction in water content) is delayed. In FIG. 10, white circles indicate the lowest water content points (substantially at the end of the regeneration process) at each measurement point P0 to PIG, and black circles indicate each measurement point P
0~P,. The water content reaches its maximum point (at the actual end of the adsorption process).

However, in conventional multi-unit adsorption refrigeration equipment, each heat exchanger with adsorbent is connected in series with each other, and each working medium heat exchanger is also connected in series with each other. The fluid (W) for each working medium heat exchanger is
i Cooling fluid or condensing fluid) is switched.

(Problems to be Solved by the Invention) The present invention is directed to a series-connected heat exchanger P with an adsorbent in a suction type refrigerating apparatus of the above-mentioned refrigeration uni-noto connection type.
Between the timing of switching the cooling fluid or heating fluid to unit A and the timing of switching the cooling fluid or condensing fluid to the working medium heat exchanger of each adsorption refrigeration unit connected in series. By providing a time difference, the supply of cooling fluid or condensing fluid to the working medium heat exchanger of each adsorption refrigeration unit 1 can be made to match the adsorption or regeneration effect of the adsorbent that actually occurs in the adsorption refrigeration unit. This is what we are trying to do.

(Means for Achieving the Object) In order to achieve the above object, the method of operating an adsorption refrigeration apparatus of the present invention is directed to an adsorption refrigeration apparatus as illustrated in FIGS. 1 to 6, that is, a gas phase A plurality of sealed containers IA. ,IB
, IC... are supplied with a cooling fluid or a heating fluid, and have the function of adsorbing the working medium W when receiving the cooling fluid, and releasing the working medium W when receiving the heating fluid. Adsorbent-equipped heat exchangers 2A, 2B,
2C... and the heat exchanger with adsorbent 2A, 2B, 2C...
As the working medium W is adsorbed and released by..., heat exchange occurs between the working medium W and the working medium W.
Working medium heat exchangers 3A, 3B, 3G, etc., which act to cause evaporation or condensation are installed in the containers 1A, IB, IC... The fluid to be cooled F. is connected to the heat exchangers 3A, 3B, 3C, . . . and is to be cooled during the evaporation of the working medium W. and a condensing fluid supply source 7 which is also connected to each working medium heat exchanger il3A, 3B, 3C, etc. and supplies a condensing fluid F7 when the working medium W is condensed. are provided, and each of the adsorbent heat exchangers 2A, 2B. 2C... connects them in series, while each of the working medium heat exchangers i13A, 3
B. 3C... can be selectively connected to the cold energy utilization equipment 6 or the condensing fluid supply source 7 mutually in series or each individually, and these working medium heat exchangers 3A , 3 B, 3 C... are the same sealed container IA. , IB, Ic..., corresponding to the adsorption or release action of the working medium W that actually occurs in the adsorbent-equipped heat exchangers 2A, 2B, 2C..., during the actual adsorption action. Each of the working medium heat exchangers 3A, 3B, 3C, etc. is connected to the cooling energy utilization equipment with a time difference so that it is connected to the utilization equipment 6 and to the condensing fluid supply source 7 during the actual discharge operation. 6 or a condensing fluid supply [7].

(Function) In the operating method of the adsorption refrigeration system of the present invention, when switching from the adsorption process to the regeneration process, first, the series connection body of each heat exchanger with adsorbent i1 (2A, 2B, 2C...) (switching from cooling fluid F to heating fluid F), and then after a predetermined period of time, each working medium heat exchanger (3A, 3A, 3B
, 3C...) as heating fluid F. When switching from the regeneration process to the adsorption process, first the fluid is switched to the series connection body of each adsorbent heat exchanger 2 (from the heating fluid F, to the cooling fluid F). Fluid F
, ), and then, after a predetermined period of time, the heat exchange i! (3A, 3B, 3G...) are sequentially switched to the adsorption process from the one closest to the upstream side of the cooling fluid F. In this way, when switching between the adsorption process and the regeneration process, the switching in each working medium heat exchanger (3A, 3B, 3C, etc.) is performed. 3C
...) to match the substance of the matter.

(Effects of the Invention) As described above, in the present invention, when operating an adsorption type refrigerating device formed by connecting several suction type refrigerating units (Ua, Ub, Uc...), the suction process and the regeneration process are performed. When switching between strokes, each adsorption refrigeration unit l-(Ua, Ub, U
c...) working medium heat exchangers (3A, 3B,
3C...) is switched to the adsorption stroke or regeneration stroke according to the actual operating performance of each adsorption refrigeration unit, so each adsorption refrigeration unit can maximize its cooling capacity, and the entire system can improve their abilities.

(Example) Next, an example of a method of operating an adsorption refrigeration system according to an embodiment of the present invention will be explained with reference to FIGS. 1 to 7. FIGS. type refrigeration unit U
Several operating modes of an adsorption refrigeration system in which al U b and U c are installed in parallel are shown. Each adsorption refrigeration unit (Ua, Ub, Uc) has a closed container (1A, I
A heat exchanger with adsorbent (2A.2B) described below is installed in B, IC).
, 2G) and a heat exchanger for the working medium (3A, 3B, 3C), and in the same sealed container (I A, IB. The working medium (W a, W b, W
c) is filled. In addition, each of these adsorption refrigeration units (U a, U b, U c) is
This system is the same as that of the basic system explained with reference to the diagram, and the explanation regarding the same basic system is referred to for parts of the structure and function of each adsorption refrigeration unit that overlap with those of the same basic system. However, in the following, the explanation will focus on parts unique to the system of the same embodiment.

The adsorbent heat exchanger ti (2A, 2B, 2C) in each adsorption refrigeration unit (Ua, Ub, Uc) is connected to the heat exchanger body (
1 1A, l IB, 1 1C) with an adsorbent such as zeolite (1 2A, 1 2 B, ! 2C) attached to the heat exchanger body (l I.A, IIB, IIC)
By supplying the cooling fluid F, to the working medium (W
ag, W bg, Wcg)
, whereas the heat exchanger body (1 1A, l IB, 1
1c) by supplying the heating fluid F, the working medium is discharged (regeneration process).

Each heat exchanger body (1 1A, 1 1B, 1 1c) in the adsorbent heat exchanger in each adsorption refrigeration unit is connected in series, and heating fluid is supplied to the series connected body. source 4 and cooling fluid supply rA5 toka valve 42
．． The connection can be made selectively by switching 43.

On the other hand, the working medium heat exchangers (3A, 3B, 3C) in each adsorption refrigeration unit (Ua, Ub, Ue) are connected to both ends of each working medium heat exchanger (3A, 3B, 3C). 6 valves (81, 82, 8384, 85
．． By switching 86), it is possible to connect them in series or in parallel. Thereby, each of the working medium heat exchangers (3A, 3B, 3C) may be connected to the cold energy utilization equipment 6 or the condensing fluid supply source 7, or may be connected to one or two other working medium heat exchangers (3A, 3B, 3C). It is possible to connect it to the cold energy utilization equipment 6 or the condensing fluid supply source 7 in series with the heat exchanger.

In addition, in FIGS. 1 to 6, the reference numeral 41 is a pump for circulating cooling fluid or heating fluid to the adsorbent heat exchanger (2A, 2B, 2C), and 6l is the cold energy utilization equipment 6 and each working medium. 1m heat exchanger! ! (3A, 3r3, 3C), a pump for circulating the fluid to be cooled, and 71 a heat exchanger for each working medium with the condensing fluid supply source 7! (3 A,
3B, 3C) shows a pump for circulating the condensing fluid.

Next, the operation of the adsorption refrigeration system according to the illustrated embodiment will be explained using the time charts shown in FIGS. 1 to 6 and FIG. (adsorbent 1 2A. 1. 2 of each adsorbent heat exchanger)
In FIG. 7, time To) is shown, when B, 12C are all in a predetermined reproduction state.

At this time, the heat exchanger body (IIA., 11
B. The series connection body of IC) is connected to a cooling fluid supply source (for example, a cooling tower) by switching valves 42 and 43.
5. In addition, each working medium heat exchanger (3A, 3B, 3C) of each adsorption refrigeration unit has valve 8.
2, 83, 84, and 85 are connected in series, and each of these working medium heat exchangers (3A
, 3B, 3G), the direct 911 connection is for valve 81.86
It is connected to the cooling/heat utilization equipment 6 by switching. Therefore, in the state shown in FIG. 1, the fluid (fluid to be cooled) F8 that should bring cold heat to the cold energy utilization equipment 6 is pressurized by the pump 6l, and is connected to the pipe Lea, the working medium heat exchanger 3A, the pipe t, ．． It circulates through the working medium heat exchanger i3B, the working medium heat exchanger 3C, the working medium heat exchanger 3C, the pipes L and d, and the cold energy utilization equipment 6. In addition, each adsorption type refrigeration unit} (Ua, U
b, Uc) each airtight container (I A., I B. l
C) contains liquid working media (WaCWb1,
The working medium W is filled so that the initial liquid levels Ha, Hb, and Hc of Wc6) are approximately the same height.

In the state shown in FIG. 1, the pump 41 supplies cooling fluid F7 to each adsorbent heat exchanger (2
When the adsorbent (1 2A, 1 2B, 1 2C) in each heat exchanger with adsorbent (2 A. 2 82C) is supplied to the series connected body of the working medium (A, 2B, 2C), it is cooled and the working medium ( Wa, Wb, Wc) vapor (gaseous working medium W ag, W bg. W c++) is continuously adsorbed, and along with this, the liquid working medium (Wa
Continuous evaporation of &W b Q , W c (1) occurs, and the latent heat of vaporization causes each liquid working medium (Wa#, W
b+2, Wcli) falls by 4 degrees. In this way, the liquid working medium (Wa1.W
b+2 , Wcf2 ) for each working medium heat exchange 1
Fluid circulating (3A, 3B, 3C) (cooling fluid)
F. is cooled, and the cold energy is used as a cooling heat source in the cold energy utilization device 6.

By the way, in this case, the adsorbent-equipped heat exchangers (2A, 2B, 2C) that are connected in series are located at the most upstream side of the cooling fluid F, due to their heat capacities. The adsorption action of the gaseous working medium (Wag) starts as soon as possible in the first heat exchanger with adsorbent tjls2A, and the adsorption action of the gaseous working medium (Wag) starts as soon as possible in the first heat exchanger with adsorbent tjls2A, and the adsorption action of the gaseous working medium (Wag) starts most quickly in the third heat exchanger with adsorbent 2C located at the most downstream side of the cooling fluid F. The adsorption action of the gaseous working medium (Wag) begins late. In addition, the second heat exchanger with adsorbent 2B located in the middle is connected to each heat exchanger with adsorbent 2A on both sides. Gaseous working medium (Wbg) in the middle of 2C
adsorption action begins.

In FIG. 1, H a' , H b' + H c' represents each adsorbent-equipped heat exchange i'! of each adsorption refrigeration unit (Ua, Ub, Uc). While N (28, 2B, 2C) continues to adsorb the gaseous working medium (W ag. W bg, W cg),
Liquid working medium (Wal!, WbLW) in IB, IC)
cl2), showing the state of the liquid level of the first adsorption refrigeration unit L, in which the adsorption action of the working medium is progressing.
At Ja, the liquid level (Ha') is at its lowest, and then at the second adsorption refrigeration unit l-Ub
Hb'), and the liquid level (Ha') in the third adsorption type refrigeration unit Uc.

In this way, each adsorption refrigeration unit (Ua, ub,
Each adsorbent (1 2A, 1 2B, 1 2C) in υC)
As the adsorption effect of the gaseous working medium progresses and a certain period of time elapses, the adsorption effect of the working medium eventually slows down. Each suction type frozen unino} (Ua
, Ub, Uc) from the adsorption process to the regeneration process.

In the illustrated embodiment, in order to switch each adsorption refrigeration unit from the absorption stage to the regeneration stage, as shown in FIG.
Switch valves 42 and 43 to connect each heat exchanger with adsorbent (2A
, 2B, 2C) are connected to the heating fluid supply source 4, and the pump 4l is further reversed to supply the heating fluid (high temperature oil of approximately 200°C) produced by the heating fluid supply source 4 F4. is supplied from the third adsorption refrigeration unit Uc side.

By the way, each adsorbent heat exchanger (2A, 2B, 2C) of each adsorption refrigeration unit was in the adsorption process and was supplied with the low-temperature purification fluid F, so it was not possible to switch from the adsorption process to the regeneration process. When switching, each heat exchanger with adsorbent (2
Even if high-temperature heating fluid F4 is supplied to each adsorbent-equipped heat exchanger (2A, 2B, 2C)
There is a certain amount of time delay until 2C) actually shifts to the regeneration process, and this becomes more noticeable in the heat exchanger RN with a nitrogen absorbing agent (2B, 2A) located downstream of the heating fluid F4.

Is the present invention as shown in the illustrated embodiment? ! Several adsorption-type refrigeration units U a. IJ b, tJ c... directly evening 1
When operating an adsorption refrigeration system connected to 1-, we focused on the time delay until the actual adsorption/regeneration switching effect is realized when switching between the adsorption process and the regeneration process, as described above. By using it in reverse, you can maximize the capacity of each suction type refrigeration unit. f( 士{I f: L tT+-Q, l'l "I-. I'i
i7 (:t,,7 11 j': I”)4 TI
How Ming's technical idea is realized in the illustrated embodiment will be explained.

Figure 2 shows three adsorption refrigeration units (Ua, UbUc).
) shows the state (time T8 in FIG. 7) immediately after the adsorption refrigeration system is switched from the adsorption process to the regeneration process, and in this state, the third adsorption refrigeration unit U
Even if the heating fluid F4 is supplied from the adsorbent heat exchanger 2C side of c, the second and first adsorption type refrigeration unit Ub, U
At the same time, no regeneration effect is realized on the a side. Therefore, on the working medium heat exchange zone (3A, 3B, 3C) side, the working medium heat exchanger 3C of the third adsorption refrigeration unit Uc, which substantially shifts to the regeneration process, corresponds to this.
only to the condensing fluid supply 7 (valve 85.8
6), the cooling fluid (fluid for condensing the gaseous working medium Wag) F? from the condensing fluid supply source 7. The remaining two adsorption refrigeration units (Ub and Ua) continue the adsorption process while remaining connected to the cold energy utilization unit 6 (the tile cooling fluid Fnl is supplied to the cold energy utilization unit 6).
Sakero 1, after a while in the above state (for example, about t. = 2 minutes in Figure 7), the second
Heat exchanger 2 with adsorbent in adsorption refrigeration unit Ub
The B adsorbent 12B also rises in temperature and begins to vaporize and release the working medium adsorbed in the B adsorbent 12B (substantially the start of the regeneration process). By switching .85, the working medium heat exchanger 3p of the second adsorption refrigeration unit Ub is connected to the condensing fluid supply source 7 (FIG. 3). At this time, in the remaining first adsorption refrigeration unit Ua, the temperature of the adsorbent 12A of the adsorbent heat exchanger 2A has not yet risen sufficiently, and in the first adsorption refrigeration unit l/Ua, the working medium The heat exchanger 3A is directly connected to the cold energy utilization equipment 6 to continue the adsorption process.

Next, if you stay in this state for a while (for example, the seventh
In the figure (.=about 4 minutes), the adsorbent 12A of the adsorbent heat exchanger 2A in the first adsorption refrigeration unit Ua also increases in level 1, and the working medium adsorbed in the adsorbent 12A. begins to be released (substantially the start of the regeneration process), then valves 81 and 8 are activated to condense this.
By switching 2.83, the working medium heat exchanger 3A of the first adsorption refrigeration unit Ua is connected to the condensing fluid supply R7 side (FIG. 4). When this state is reached, the adsorption refrigeration unit connected to the cold energy utilization device 6 disappears, and the pump 61 stops. In this way, the regeneration process is performed in all adsorption refrigeration units (Ua, Ub, Uc), and this continues until the next adsorption process (time T in FIG. 7). time tn = approx. 2
0 minutes). In addition, the condensation heat taken from the working medium W a = W c by the condensing fluid F flowing through the working medium heat exchangers 3A to 3C during the above-mentioned regeneration process is utilized as a heat source for various heating purposes. (For example, it is possible to use the condensing fluid supply source 7 as a heating radiator, a dryer, a water heater, etc.). In that case, if the condensing fluid supply source 7 is a water heater and the hot water produced there is stored in a hot water storage tank with a certain volume, then the adsorbents 12A to 12C of each refrigeration unit Ua=Uc
Hot water can be used continuously even during the adsorption process.

Next, a case will be described in which the adsorption refrigeration system of the illustrated embodiment switches from the regeneration process to the adsorption process.
) has elapsed (time T in FIG. 7), the valves 42 and 43 are switched as shown in FIG.
Ub. Uc) heat exchanger with adsorbent (2A, 2B, 2C)
The series connection of is switched to the supply of cooling fluid F from the cooling fluid supply source 5 instead of the heating fluid F supplied from the heating fluid supply source 4. At this time, the adsorbent heat exchanger (2A, 2B.2
C) are in a high temperature state due to the supply of heating fluid in the regeneration process up to that point, so cooling fluid F. Even if they are supplied, their temperatures do not decrease simultaneously, and therefore, switching to the actual adsorption process is performed sequentially with a predetermined time difference.

That is, when switching from the regeneration process to the adsorption process, contrary to the case of switching from the adsorption process to the regeneration process described earlier, first the adsorbent-equipped heat exchanger of the l-th adsorption type refrigeration unit Ua is 2A, the adsorption action of the working medium is started, and therefore, only the working medium heat exchanger 3A in the first adsorption refrigeration unit Ua is connected to the cold energy utilization equipment 6, and the pump 6l starts supplying the fluid to be cooled F8. In response, the other two working medium heat exchangers 13B and 3C continue to be supplied with the condensing fluid F7 by the pump 71 while still being connected to the condensing fluid supply source 7.

After a while in the above state (for example, about t.=2 minutes in FIG. 7), the absorbent 1. 2
Since B also starts to absorb the working medium due to the decrease in crop quality,
The working medium heat exchanger 3B of the second adsorption refrigeration unit Ub is also switched from the condensing fluid supply 17 to the cold energy utilization equipment 6 in accordance with this. That is, in this state as shown in FIG. 6, by switching the valves 82, 83 and 84, the working medium heat exchangers IN3A and IN3B are connected in series, and the pump 6
1 receives the supply of cooling fluid F0, and continues to supply the condensing fluid F only to the remaining working medium heat exchanger 3C.

Then, after a further predetermined period of time (t*s = about 4 minutes in Fig. 7) has elapsed, a substantial adsorption action begins in the third adsorption refrigeration unit (UC) due to the temperature drop of the adsorbent 12C. Accordingly, the working medium heat exchange W3C of the third adsorption refrigeration unit Uc is also switched from the condensing fluid supply source 7 to the cold energy utilization unit 6. That is, when FIG. 1 is in this state and compared with FIG. 6, the valves 84, 85, and 86 are switched as shown in FIG. 1, and the pump 71 is in a rest state (time T in FIG. 7). This state is the switch to the next regeneration process (
The operation continues until T8) in FIG. 7, and thereafter the above-described operation cycle is repeated.

As described above, in the illustrated embodiment, the present invention is applied to each working medium heat exchanger (
3A, 3B, 3C), the fluid to be cooled F. or condensing fluid F, to each adsorption refrigeration unit (Ua, U
b, Ue) are made to operate as effectively as possible, making it possible to improve the operating efficiency.

Next, a method of operating the adsorption refrigeration system of the illustrated embodiment explained with reference to FIGS. 1 to 6 will be explained using the flowchart of FIG. T8 is the time T in the time chart of FIG.
Suppose that it is at the midpoint between I and T (that is, the time Ts is between the time when the previous operation stopped and the time T during the regeneration process)
). This time Ts is the time when time ts has elapsed since the previous switching point from the adsorption process to the regeneration process (T8), and in order to operate this adsorption refrigeration system, first, in step S, the refrigeration system The initial regeneration process is performed until a certain regeneration process is completed (for a period of time tn-ts). Note that the elapsed time ((S) from the above time (T1) at the end of the previous operation is stored in the controller of the refrigeration system, and the time (tn - ts) of the above initial regeneration process is stored in the controller of the refrigeration system. automatically calculated by

Next, when the initial regeneration process is completed as described above (time T8 in FIG. 7), as shown in step S, the adsorbent heat exchanger 2A. ．． The series connection of 2B and 2C is connected to the cooling fluid supply source 5 to switch from the regeneration process to the adsorption process.

At this time, only the first working medium heat exchanger 3A among the three working medium heat exchangers 3A, 38.3C that had been connected in series until then is connected to the cold energy utilization equipment 6,
The remaining second and third working medium heat exchangers 3B and 3C remain connected to the condensing fluid supply source 7 and continue the regeneration process.

When time h has elapsed in this state, the second working medium heat exchanger 3B is connected to the cold energy utilization equipment 6 (in series with the first working medium heat exchanger i33A), and the remaining "third working medium" is Only the heat exchanger 3C continues the regeneration process (step S
S). Furthermore, when the elapsed time from time 'r in FIG. In series with the working medium heat exchangers 3A and 3B>, an adsorption process is performed in all the refrigeration units Ua, Ub, and Uc (step S4).

This adsorption process continues from time T in FIG. 7 until time t has elapsed (time T8), and when time T is reached, the adsorbent-equipped heat exchangers 2A, 2B, 2 The series connection C is switched from the cooling fluid supply 5 to the heating fluid supply 4 connection. At the same time, among the three working medium heat exchangers 3A, 3B, and 3C, only the third working medium heat exchanger 13c is connected to the condensing fluid supply source 7, and the remaining second and first working medium The heat exchangers 3B and 3A are directly connected to the cold energy utilization equipment 6 (step S8).
.

Next, from this time T, to time t. After a delay, the second working medium heat exchanger 3B is connected to the condensing fluid supply source 7 (
Step SS), and furthermore, when time (.) has elapsed since the same time T, the first working medium heat exchanger 3A is connected to the condensing fluid supply 11iX7 (step SS?), and all adsorption refrigeration h A regeneration process is performed at U a, U b, and U c. This regeneration process is performed at the seventh
Time (n has elapsed since time T in the figure (time T.)
When the suction process is continued until then, the suction process is switched again (Stenob S8), and this cycle is repeated thereafter.

In the above embodiment, when switching from the suction process to the regeneration process or from the regeneration process to the adsorption process, each working medium heat exchanger 3A, 3B, 3C and the cold energy utilization unit 6 or condensing Fluid supply [The connection delay with L7 is executed according to the preset time Lll+Ll*t*++ teffi, but this heat exchanger for each working medium tl
The connection timing between +13A, sB, 3c and the cold energy utilization equipment 6 or the fluid supply source 7 for Mm may be determined by time as in the above embodiment, or for example, for each working medium heat exchanger 13A, 3B, 3C. 1st and 2nd corresponding to
, each third heat exchanger with adsorbent 2A. 2B, 2C, or the airtight container IA. I. B,
I. Liquid level height HaH of liquid working medium WaLWb&, Wcl2 in C b. This can be done by H c.

[Brief explanation of drawings]

FIGS. 1 to 6 are explanatory diagrams of each process during execution of the method of operating the adsorption refrigeration apparatus according to the embodiment of the present invention, respectively;
Fig. 7 is a time chart thereof, Fig. 8 is a flowchart of the operating method of the same embodiment, Fig. 9 is an explanatory diagram of the basic concept of the adsorption refrigeration system, and Fig. 10 is an adsorbent in the adsorption refrigeration equipment shown in Fig. 9. It is a moisture content change diagram at each of 12 measurement points. 1A, IB, Ic... Sealed container 2A 2
B 2C ・・・・Heat exchange with adsorbent 3A. 3B
．． 3C...Working medium heat exchanger 4
... Heating fluid supply source 5 ... Cooling fluid supply source 6 ... Cold energy utilization equipment 7 ... Condensing fluid supply source 11A IIB
IIC...Heat exchanger body 12A I2B 12
c ・●・・Adsorbent 41,6L7k ・・・・・・・・・・・・・・・・・・Fluid for heating F, ・・・・Fluid for cooling F @ ・・・・・・・Fluid to be cooled F? ...Condensing fluid UalUb, Uc I I al wb, wC 1 1 ''a+L llbg, actual cg a ma& , Wb& , 'Ic& Suction type refrigeration unit Working medium Gaseous working medium 1 Night working medium

Claims (1)

[Claims] 1. A cooling fluid or a heating fluid is placed in each of a plurality of closed containers (1A, 1B, 1C...) filled with a working medium (W) that changes phase between a gas phase and a liquid phase. Adsorbent-equipped heat exchangers (2A, 2B, 2C) that adsorb the working medium (W) when receiving the cooling fluid and release the working medium (W) when receiving the heating fluid.
) and the heat exchanger with adsorbent (2A, 2B, 2C・
...) as the working medium (W) is adsorbed and released by the working medium (W), heat is exchanged with the working medium (W), thereby causing an evaporation or condensation action in the working medium (W). While installing medium heat exchangers (3A, 3B, 3C...), each airtight container (1A, 1B, 1C...) is installed.
...) Outside each working medium heat exchanger (3A, 3B
, 3C...) for supplying the fluid to be cooled (F_8) to utilize the cold heat during the evaporation of the working medium (W), and A condensing fluid supply source (7) is provided that is connected to the exchanger (3A, 3B, 3C...) and supplies a condensing fluid (F_7) during the condensation action of the working medium (W), and further The adsorbent heat exchangers (2A, 2B, 2C...) are connected in series, while the working medium heat exchangers (3A, 3B, 3C...) are connected to each other in series. It can be selectively connected to the cold energy utilization equipment (6) or the condensing fluid supply source (7) in series or individually, and these working medium heat exchangers (3A, 3B, 3
C...) is each heat exchanger with adsorbent (2A, 2B, 2C...) in the same container (1A, 1B, 1C...)
Corresponding to the adsorption or release action of the working medium (W) that actually occurs, the cooling energy utilization equipment (6) is provided during the actual adsorption action, and to the condensing fluid supply source (7) during the actual release action. so that the respective working medium heat exchangers (3A, 3B, 3C...) are connected to the cold energy utilization equipment (6) or the condensing fluid supply source (7) with a time difference from each other. A method of operating an adsorption refrigeration system characterized by: