JP2009121740A - Adsorption type heat pump and its operation control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adsorption type heat pump improved in operation efficiency to produce cold by utilizing an adsorption type refrigerating cycle. <P>SOLUTION: A batch processing mode for alternately repeating switching of a desorption-condensation process and an adsorption-evaporation process between a pair of adsorption tanks 2a, 2b is performed. A sensible heat exchange mode is performed in switching the process of this time to the next time. A heat medium of an intermediate temperature from a radiating portion 4 is supplied and passed to a heat exchanger 22a of the desorption process this time, then allowed to flow to a heat exchanger 22b performing the desorption process in the next time through by a bypass passage 12, and returned. A heat medium of low temperature from a cooling portion 5 is supplied and passed to a heat exchanger 23a of the condensation process this time, then allowed to flow to a heat exchanger 23b performing the condensation process in the next through a bypass passage 14, and returned. A thermal condition of the next process is accessible more easily in advance by effectively utilizing sensible heat previously disposed, when the batch processing mode is simply switched. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an adsorption heat pump using an adsorption refrigeration cycle, an adsorption / desorption heat exchanger that adsorbs or desorbs an adsorbate, and a condensation / condensation that condenses the adsorbate or evaporates the condensed adsorbate. The present invention relates to an adsorption heat pump using an integrated adsorption tank in which an evaporation heat exchanger is disposed in one housing, and an operation control method thereof.

  Conventionally, as a system using an adsorption refrigeration cycle, an adsorption / desorption heat exchanger, a heat exchanger for condensation, and a heat exchanger for evaporation are arranged in a single housing in which an adsorbate is enclosed. By providing four adsorption tanks and switching the temperature of the heat medium for the adsorption / desorption heat exchanger in each adsorption tank, the desorption-condensation process and the adsorption-evaporation process are sequentially switched in the four adsorption tanks. Thus, there is known one in which continuous cold extraction is performed (see, for example, Patent Document 1). In this structure, as a configuration of the adsorption tank, an evaporation heat exchanger is disposed at a lower position in one housing, and an adsorption / desorption heat exchanger is disposed at an upper position, and an adsorption / desorption heat exchanger is provided. Condensation heat exchangers are arranged at positions around the side of the.

  A pair of adsorption / desorption heat exchangers, one condensation heat exchanger disposed above the pair of adsorption / desorption heat exchangers, and the pair of adsorption / desorption heat exchangers. Combined with one evaporating heat exchanger at the lower position, each adsorption / desorption heat exchanger, condensing heat exchanger, and evaporating heat exchanger are individually accommodated in a sealed space to store water vapor. There is also known one in which the adsorbate is moved by a valve (for example, see Patent Document 2). In this apparatus, a pair of adsorption / desorption heat exchangers are alternately switched between a desorption-condensation process and an adsorption-evaporation process to perform continuous cold extraction.

JP 2006-52889 A Japanese Patent No. 3490543

  By the way, in order to continuously extract cold heat using low-temperature exhaust heat as a heat source using an adsorption refrigeration cycle, at least two core parts having the same configuration are provided as adsorption / desorption, and adsorption / desorption is performed. Since it is necessary to repeat these steps alternately, the overall system is increased in size. For this reason, in order to reduce the size of the entire system, the heat exchanger for condensation and the heat exchanger for evaporation are shared by one heat exchanger, that is, the condenser and the evaporator are integrated, and the adsorption / It has been considered to use an integrated adsorption tank disposed in the same space in one housing together with the desorption heat exchanger. For example, as shown in FIG. 6, as an integrated adsorption tank 100, one adsorption / desorption heat exchanger 102 provided with an adsorbent (for example, silica gel) at an upper position in one housing 101 is disposed at a lower position. One heat exchanger 103 for condensation / evaporation is provided, and an adsorbate (for example, water) W is sealed inside the housing 101 that is brought into a predetermined vacuum state by the vacuum pump 104.

  Based on the example of FIG. 7, the configuration of an example of an adsorption heat pump in the case where a plurality of (for example, two) such integrated adsorption tanks 100, 100 are used and the operation principle related to cold heat extraction will be briefly described. It becomes as follows. In FIG. 7, reference numeral 110 denotes a high-temperature heat medium unit that holds the heat medium in a predetermined high temperature state using waste heat such as waste warm water, and 111 holds the heat medium in a predetermined low temperature state. A heat dissipating part (for example, an outdoor unit) 112 is a cooling part having a built-in heat exchanger for taking out cold heat for recovering and taking out cold heat from the coldest heat medium returned to the heat exchanger 113, 114, 115, 116 Are first to fourth switching sections each including four on-off valves V1 to V4.

  First, the desorption-condensation step in one adsorption tank 100 (for example, the left side in FIG. 7) is performed as follows. That is, in the adsorption / desorption heat exchanger 102 in the one adsorption tank 100, the heat medium having a temperature TH (for example, 80 ° C.) is transferred from the high-temperature heat medium unit 110 to the second switching unit 114 (V3 by the operation of the pump 117. If the adsorbent is heated by the heating medium, the desorption (desorption / regeneration) process is performed by the heating medium. Adsorbate) is released and desorbed. At that time, in the heat exchanger 103 for condensation / evaporation in the one adsorption tank 100, a part of the heat medium having a temperature TM (for example, 40 ° C.) is transferred from the heat radiating unit 111 by the operation of the pump 118. 116 (open V1) is supplied to the inside and functions as a condenser. Therefore, the desorbed water vapor is condensed and liquefied mainly by coming into contact with the outer surface of the heat exchanger 103 for condensation / evaporation, and is stored as water (liquid phase adsorbate) at the bottom of the housing 101. Become.

  At the same time, the adsorption-evaporation process is performed as follows in the other adsorption tank 100 (the right side in FIG. 7). That is, in the adsorption / desorption heat exchanger 102 in the other adsorption tank 100 described above, the remaining heat medium is supplied from the heat radiating unit 111 to the inside through the second switching unit 114 (V2 opened) by the operation of the pump 118. When the adsorbent is cooled, the adsorbent of the adsorption / desorption heat exchanger 102 performs an adsorption process for adsorbing water vapor in the housing 101. In the heat exchanger 103 for condensing / evaporating in the other adsorption tank 100, the heat medium having a temperature TL (for example, 15 ° C.) raised by heat exchange with the cold extraction heat exchanger of the cooling unit 112 is pumped. By the operation of 119, it is supplied to the inside through the fourth switching unit 116 (V4 is opened), thereby functioning as an evaporator. As a result, the water accumulated at the bottom of the housing 101 is evaporated due to condensation and liquefaction in the previous step, and the heat medium in the condensation / evaporation heat exchanger 103 is cooled by the heat of vaporization of the evaporation to lower the temperature. The lowered heat medium is returned to the cooling unit 112 via the third switching unit 115. Then, cold heat is extracted from the heat medium returned to the cooling unit 112 by heat exchange in the cold heat extraction heat exchanger in the cooling unit 112.

  The desorption-condensation process in the one adsorption tank 100 and the adsorption-evaporation process in the other adsorption tank 100 are alternately switched between the pair of adsorption tanks 100, 100 by batch processing. By repeatedly performing the switching, the cooling heat extraction in the cooling unit 112 is continuously performed.

  However, according to the adsorption heat pump using such integrated adsorption tanks 100, 100, the sensible heat generated by the progress of the processes up to this point in use in each integrated adsorption tank 100 is wasted. It has the disadvantage that it is discarded and causes sensible heat loss, or the sensible heat causes a decrease in efficiency of cold heat generation.

  For example, a heat medium having a temperature TH (for example, 80 ° C.) is supplied from the high-temperature heat medium unit 110 to the adsorption / desorption heat exchanger 102 of the one adsorption tank 100 in the desorption-condensation process, and is adsorbed by the heat medium. Although the desorption process is performed by heating the desorption heat exchanger 102, the temperature TM (for example, 40 ° C.) is used from the heat radiating unit 111 to perform the adsorption process on the same adsorption / desorption heat exchanger 102 by the next process switching. Thus, the adsorption / desorption heat exchanger 102 heated to 80 ° C. in the previous step is cooled. The heat medium raised in temperature by the heat exchange at this time is returned to the heat radiating section 111, and the heat radiating section 111 radiates and cools to the temperature TM, resulting in wasteful disposal of sensible heat. Yes.

  Alternatively, the condensation process is performed by supplying a heat medium having a temperature TM (for example, 40 ° C.) from the heat radiating unit 111 to the heat exchanger 103 for condensation / evaporation of the one adsorption tank 100 in the desorption-condensation process. However, by the above process switching, supply of a heat medium having a temperature TL (for example, 15 ° C.) from the cooling unit 112 to the same condensation / evaporation heat exchanger 103 is started and circulated between the cooling unit 112. Thus, the heat medium having the temperature TM that has been supplied until the process switching is returned to the cooling unit 112. As a result, the efficiency of the cold heat extraction in the cooling unit 112 is temporarily reduced.

  The present invention has been made in view of such circumstances, and an object of the present invention is to suppress / eliminate the above inconveniences and to generate cold using an adsorption refrigeration cycle. An object of the present invention is to provide an adsorption heat pump capable of improving the operation efficiency and an operation control method thereof.

  In order to achieve the above object, in the present invention, a pair of integrated adsorption tanks, a heat medium supply system that circulates and supplies a predetermined heat medium to each adsorption tank, and heat medium supply by the heat medium supply system are switched and controlled. Operation control means for executing operation control for cold heat generation, and each of the adsorption tanks adsorbs or desorbs the adsorbate in a housing as a vacuum container in which the adsorbate is enclosed. Heat exchanger for adsorption / desorption with an adsorbent that can be switched to each other, and heat exchange for condensation / evaporation that can be switched between condensing the adsorbed adsorbate and evaporating the adsorbate for adsorption And the heat medium supply system is used for adsorption / desorption and condensation / evaporation with respect to the adsorption / desorption heat exchanger and the condensation / evaporation heat exchanger in each adsorption tank. A plurality of heat medium supply sources for circulatingly supplying the heat medium having different temperatures in order to A passage for supplying the heat medium from the supply source to the adsorption / desorption heat exchanger and the condensation / evaporation heat exchanger in each adsorption tank individually and in a switchable manner, and a switching portion for switching the passage. The following specific items were provided for the adsorption heat pump.

  That is, as the operation control means, as the operation control mode, the heat medium is circulated and supplied from the heat medium supply source, so that the heat exchange for condensation / evaporation is performed while being desorbed by the adsorption / desorption heat exchanger of one adsorption tank. While performing the desorption-condensation step for condensing by the vessel, the adsorption-evaporation step for evaporating with the heat exchanger for condensing / evaporating while being adsorbed by the adsorption / desorption heat exchanger of the other adsorption tank at the same time The batch processing mode in which the desorption-condensation step and the adsorption-evaporation step are alternately switched between the pair of adsorption tanks and repeated between the pair of adsorption tanks, and is manifested between the pair of adsorption tanks. And a sensible heat exchange mode for exchanging heat. And as said sensible heat exchange mode, with respect to the adsorption tank by which the desorption-condensation process is started by the batch process mode of the next process from the adsorption tank of the side by which the desorption-condensation process was performed by the batch process mode of the previous process. The flow of the heating medium is switched and controlled so that the heating medium flows (claim 1).

  In the case of the present invention, in the case of the simple switching in which the batch processing mode is repeated simply by switching the process, the sensible heat received in the previous process immediately after the process switching is discarded to the outside. By interposing the sensible heat exchange mode as described above, the sensible heat is applied to the adsorption tank on the side where the desorption-condensation process is started in the batch processing mode of the next process, and is prepared in advance by approaching the thermal conditions of the next process. As a result, the progress of the next process can be made smooth immediately after the start, and the sensible heat that has been discarded can be effectively used. For this reason, it becomes possible to improve the operation efficiency of the adsorption heat pump using the adsorption refrigeration cycle.

  In the adsorption heat pump of the present invention, a bypass passage for flowing a heat medium from one to the other between both adsorption / desorption heat exchangers in a pair of adsorption tanks, and both condensation / evaporation in the pair of adsorption tanks And a bypass passage for flowing a heat medium from one to the other between the heat exchangers, and as the operation control means, the heat medium passes between the pair of adsorption tanks through the bypass passage. The sensible heat exchange mode can be executed by switching and controlling the flow of the heat medium. In this case, direct flow of the heat medium from one adsorption tank to the other adsorption tank can be easily realized simply by switching the flow of the heat medium so as to pass through the bypass passage. By exchanging sensible heat based on the direct flow of the heat medium from the adsorption tank to the other adsorption tank, the operation of the present invention can be obtained reliably.

  Further, in the adsorption heat pump of the present invention, the heat medium temperature detecting means for detecting the temperature of the return side heat medium after passing through the adsorption tank on the side where the desorption-condensation process is started in the batch process mode of the next step. As the operation control means, the sensible heat exchange mode is raised to near the heat medium temperature supplied in the desorption-condensation process started in the batch process mode of the next process by the heat medium temperature detection means. It can be set as the structure continued until it is detected (Claim 3). In this case, the sensible heat of the adsorption tank on the side where the desorption-condensation process is executed in the batch process mode of the previous process is transferred to the adsorption tank on the side where the desorption-condensation process is started in the batch process mode of the next process. On the other hand, it is possible to start the batch processing mode of the next process after confirming that the sensible heat exchange has been performed by being surely moved. As a result, the sensible heat exchange of the present invention can be realized with certainty, and the operation of the present invention can be obtained with certainty.

  On the other hand, in the invention relating to the operation control method of the adsorption heat pump, a pair of integrated adsorption tanks, a heat medium supply system for circulatingly supplying a predetermined heat medium to each adsorption tank, and heat medium supply by the heat medium supply system are provided. Operation control means for performing operation control for cold heat generation by switching control, and each of the adsorption tanks adsorbs the adsorbate in a housing as a vacuum container in which the adsorbate is enclosed. Adsorption / desorption heat exchanger with adsorbent that can be desorbed and switched, and condensation / evaporation for switching desorbed adsorbate and vaporizing adsorbate for adsorption The heat medium supply system is configured to adsorb / desorb and condense / evaporate the adsorption / desorption heat exchanger and the condensation / evaporation heat exchanger in each adsorption tank. Multiple heating media that circulate and supply heating media at different temperatures And a passage for supplying the heat medium from each heat medium supply source to the adsorption / desorption heat exchanger and the condensation / evaporation heat exchanger in each adsorption tank individually and in a switchable manner. A desorption-condensation that is condensed by a heat exchanger for condensation / evaporation while being desorbed by an adsorption / desorption heat exchanger of one adsorption tank by circulating and supplying the heat medium from the heat medium supply source While performing the process, the adsorption / evaporation process of evaporating with the heat exchanger for condensation / evaporation is performed while being adsorbed by the adsorption / desorption heat exchanger of the other adsorption tank, and this desorption / condensation is performed. The following specific matters are provided for an operation control method of an adsorption heat pump that performs cold heat generation in a batch processing mode in which a process and an adsorption-evaporation process are alternately switched between the pair of adsorption tanks and repeated. did.

  That is, after the end of the current batch processing mode and before the next batch processing mode is started, the desorption-condensation process is performed in the next batch processing mode from the adsorption tank on the side where the desorption-condensation process is performed in the current batch processing mode. -A sensible heat exchange mode is performed in which the flow of the heat medium is switched and controlled so that the heat medium flows to the adsorption tank on the side where the condensation process is started. After the heat is exchanged, the next batch processing mode is started (Claim 4). In the case of this operation control method for the adsorption heat pump, it is possible to obtain the same action as that obtained by the invention of claim 1.

  Further, in the operation control method of the adsorption heat pump, the heat medium flown from the adsorption tank on the side where the desorption-condensation step is executed in the current batch processing mode is desorbed-condensed in the next batch processing mode. Detects the temperature after passing through the adsorption tank on the side where the heat treatment starts, and the temperature of the heat medium rises to near the heat medium temperature supplied in the desorption-condensation process started in the batch processing mode of the next process. On the condition, the execution of the sensible heat exchange mode can be terminated and the next batch processing mode can be started (Claim 5). In this case, the sensible heat of the adsorption tank on the side where the desorption-condensation process is executed in the current batch processing mode is surely applied to the adsorption tank on the side where the desorption-condensation process is started in the next batch processing mode. It is possible to start the next batch processing mode after confirming that the sensible heat exchange has been carried out. Thus, the sensible heat exchange based on the operation control method according to the fourth aspect of the invention can be realized with certainty, and the operation can be obtained with certainty.

  As described above, according to the adsorption heat pump of any one of claims 1 to 3, in the case of simple switching that repeats the batch processing mode only by switching the process, the sensible heat received in the previous process is reduced. The sensible heat is applied to the adsorption tank on the side where the desorption-condensation process is started in the batch process mode of the next process by interposing the sensible heat exchange mode, while being discarded outside immediately after the process switching. Thus, the thermal condition of the next process can be prepared in advance. As a result, the progress of the next process can be made smooth immediately after the start, and effective use of the sensible heat that has been discarded can be achieved. Thereby, the operating efficiency of the adsorption heat pump using the adsorption refrigeration cycle can be improved.

  In particular, according to claim 2, it is possible to flow the heat medium directly from one adsorption tank to the other adsorption tank only by switching the flow of the heat medium to the bypass passage. By exchanging sensible heat based on the direct flow of the heat medium to the other adsorption tank, the effect of the present invention can be obtained with certainty.

  According to claim 3, the sensible heat of the adsorption tank on the side where the desorption-condensation step is executed in the batch processing mode of the previous step is the side where the desorption-condensation step is started in the batch processing mode of the next step. After confirming that the sensible heat exchange has been performed with respect to the adsorption tank, the batch processing mode of the next process can be started, thereby ensuring the above sensible heat exchange. Therefore, the effects of the present invention can be obtained with certainty.

  On the other hand, according to the operation control method of the adsorption heat pump of claim 4 or claim 5, the same effect as that obtained by the adsorption heat pump of claim 1 can be obtained. Thus, the same effect as that obtained by the adsorption heat pump according to the third aspect can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a principle view showing an example of an adsorption heat pump according to an embodiment of the present invention. In the figure, reference numerals 2a and 2b are integrated adsorption tanks, 3 is a high-temperature heat medium section that retains the heat medium at a predetermined high temperature using waste heat such as waste hot water, and 4 is a predetermined heat medium. A heat radiating unit (for example, an outdoor unit) that maintains and maintains a low temperature state, 5 is a cooling unit with a built-in cold heat extraction heat exchanger for collecting and taking out cold heat from the coldest heat medium returned to this by heat exchange , 6, 7, 8, and 9 are first to fourth switching units configured with four on-off valves V1 to V4, V5 to V8, V9 to V12, and V13 to V16, respectively. Are bypass passages arranged to bypass the switching units 6, 7, 8, and 9 with the on-off valves V21, V22, V23, and V24 interposed therebetween. The high temperature heat medium part 3, the heat radiating part 4 and the cooling part 5 and the pumps 31, 41, 51 described later attached to each constitute a heat medium supply source, and various passages 32, 33, 42-47, described later, 52, 53, 61a, 61b, 71a, 71b, 81a, 81b, 91a, 91b and the switching units 6-9 constitute a heat medium supply system.

  The pair of integrated adsorption tanks 2a and 2b have the same configuration, and the adsorption tank 2a has both an adsorption / desorption heat exchanger 22a and a condensation / evaporation heat exchanger 23a in the housing 21a. Similarly, the adsorption tank 2b is also constructed by arranging both the adsorption / desorption heat exchanger 22b and the condensation / evaporation heat exchanger 23b in the housing 21b. It is a thing. Each of the housings 21a and 21b is maintained in a substantially vacuum state by a vacuum pump (not shown) or the like, and a required amount of adsorbate such as water, alcohol or ammonia is sealed inside. Further, adsorbents such as zeolite, silica gel, activated carbon and the like are fixed to the outer surfaces of the adsorption / desorption heat exchangers 22a and 22b.

  From the high-temperature heat medium section 3, a heat medium having a temperature TH (for example, 80 ° C.) is supplied to the second switching section 7 through the forward path 32 by the operation of the pump 31, and the heat medium passes through the opening / closing valve V7. The heat medium 22a is supplied to the adsorption / desorption heat exchanger 22a of the adsorption tank 2a through the passage 71b or the heat exchanger 22b of the adsorption tank 2b through the passage 71b when the on-off valve V8 is opened. It has become. And from each adsorption | suction / desorption heat exchanger 22a, 22b, it returns to the 1st switching part 6 through passage 61a, 61b, and also to the said high-temperature heat-medium part 3 through the corresponding on-off valve V3, V4 and the return path 33. The heating medium is returned to the temperature TH and is circulated after being heated again.

  From the heat radiating unit 4, the pump 41 is operated to the second switching unit 7 and the fourth switching unit 9 through the outgoing paths 43 and 44 where the heating medium having a temperature TM (for example, 40 ° C.) is branched into two through the outgoing path 42. Branch supply is provided. In the second switching unit 7, if the on-off valve V5 is opened, the heat medium passes through the passage 71a to the adsorption / desorption heat exchanger 22a of the adsorption tank 2a, or if the on-off valve V6 is opened, the heat medium passes through the passage 71a. It is supplied to the adsorption / desorption heat exchanger 22b of the adsorption tank 2b through 71b. And from each adsorption | suction / desorption heat exchanger 22a, 22b, it returns to the 1st switching part 6 through passage 61a, 61b, and also to the said heat radiating part 4 through corresponding opening-and-closing valve V1, V2 and return path 46,47. The heating medium is returned to the above temperature TM again and cooled and cooled to circulate. In the fourth switching section 9, if the on-off valve V13 is opened, the heat medium passes through the passage 91a to the heat exchanger 23a for condensation / evaporation in the adsorption tank 2a, or if the on-off valve V14 is opened, the heat medium. Is supplied to the condensation / evaporation heat exchanger 23b of the adsorption tank 2b through the passage 91b. The heat exchangers 23a and 23b for condensation / evaporation are returned to the third switching unit 8 through the passages 81a and 81b, and further to the heat radiating unit 4 through the corresponding on-off valves V9 and V10 and the return passages 45 and 47. The heating medium is returned to the above temperature TM again and cooled and cooled to circulate.

  When the pump 51 is operated from the cooling unit 5, a heat medium having a temperature TL (for example, 15 ° C.) is supplied to the fourth switching unit 9 through the forward path 52, and if the on-off valve V15 is opened, the heat medium passes through the passage 91a. If the open / close valve V16 is opened to the condensation / evaporation heat exchanger 23a of the adsorption tank 2a, the heat medium is supplied to the condensation / evaporation heat exchanger 23b of the adsorption tank 2b through the passage 91b. ing. The heat exchangers 23a and 23b for condensation / evaporation are returned to the third switching unit 8 through the passages 81a and 81b, and are further returned to the cooling unit 5 through the corresponding on-off valves V11 and V12 and the return passage 53. Thus, the heat medium having the temperature TL is circulated again after the cold heat is taken out.

  The bypass passage 11 is disposed so as to connect between the passage 61b and the passage 71a, and the passages 61b and 71a are communicated with each other by opening the on-off valve V21. The bypass passage 12 is disposed so as to connect between the passage 61a and the passage 71b, and the passages 61a and 71b are communicated with each other by opening the on-off valve V22. The bypass passage 13 is disposed so as to connect the passage 81b and the passage 91a, and the passages 81b and 91a are communicated with each other by opening the on-off valve V23. The bypass passage 14 is disposed so as to connect the passage 81a and the passage 91b, and the passages 81a and 91b are communicated with each other by opening the on-off valve V24.

  The above-described operation control of the pumps 31, 41, 51 and on / off switching control of the on-off valves V1 to V16, V21 to V24 are performed by operation control by operation control means (not shown). An operation for taking out the cold based on the adsorption refrigeration cycle described will be performed. Hereinafter, the operation control for taking out the cold energy will be described.

  FIG. 2 repeats the batch processing mode Mod that alternately switches between the desorption-condensation process and the adsorption-evaporation process in the adsorption tank 2a (labeled "A tank") and the adsorption tank 2b (labeled "B tank"). In addition, the relationship between the passage of time and the cooling output is shown when the operation control is executed such that the sensible heat exchange mode Mex is interposed between the processes.

  The operation control according to the present embodiment will be described. First, a batch processing mode Mod in which, for example, a desorption-condensation process is performed in the adsorption tank 2a (A tank) and an adsorption-evaporation process is performed in the adsorption tank 2b (B tank). The process is executed until a predetermined set time elapses, and then the sensible heat exchange mode Mex is executed before the process is switched until a predetermined switching condition is satisfied, and the process is switched, that is, the adsorption is performed in the adsorption tank 2a (A tank). -At the same time as performing the evaporation step, the batch processing mode Mod, in which the desorption-condensation step is performed in the adsorption tank 2b (B tank), is executed until a predetermined set time elapses, and thereafter, similarly, through the sensible heat exchange mode Mex. The process switching of the batch processing mode Mod is repeated alternately. For example, in adsorption tank 2a (A tank), desorption-condensation process, sensible heat exchange process, adsorption-evaporation process, sensible heat exchange process, desorption-condensation process, sensible heat exchange process, adsorption-evaporation process, sensible heat exchange process, As described above, the batch processing mode Mod in which the desorption-condensation process and the adsorption-evaporation process are alternately switched is repeated with the sensible heat exchange process in the sensible heat exchange mode Mex interposed therebetween. Correspondingly, in the adsorption tank 2b (B tank), the adsorption-evaporation process, sensible heat exchange process, desorption-condensation process, sensible heat exchange process, adsorption-evaporation process, sensible heat exchange process, desorption-condensation process, The batch processing mode Mod in which the desorption-condensation step and the adsorption-evaporation step are alternately switched is repeated with the sensible heat exchange step in the sensible heat exchange mode Mex in between.

  Explaining based on the flow chart of FIG. 3 (see also FIG. 2), first, the adsorption / desorption heat exchangers 22a, 22b of all (two) adsorption tanks 2a, 2b for stable operation at the start of operation. Are forcibly desorbed together (step S1). As the passage switching control (open / close switching control), the on / off valves V7 and V8 of the second switching unit 7 and the on / off valves V3 and V4 of the first switching unit 6 are opened to operate the pump 31. Thus, a high-temperature (temperature TH: 80 ° C.) heat medium is supplied from the high-temperature heat medium section 3 to both the adsorption / desorption heat exchangers 22a and 22b. This is performed until a preset time has passed for forced desorption.

  Next, an operation for taking out the cold is started, and for example, a batch processing mode Mod for performing a desorption-condensation process in the adsorption tank 2a (A tank) and an adsorption-evaporation process in the adsorption tank 2b (B tank) is set for a predetermined time. This is performed until t1 (for example, 120 to 180 seconds) elapses (NO in steps S2 and S3). The passage switching control and heat medium flow (see thick lines and arrows) in the batch processing mode Mod in this case will be described with reference to FIG.

  That is, for the adsorption / desorption heat exchanger 22a in the adsorption tank 2a (A tank), the pump 31 is operated to open the second switching part 7 from the high-temperature heat medium part 3 with a high-temperature heat medium. It supplies to the inside through the open / close valve V7. The adsorbent of the adsorption / desorption heat exchanger 22a is heated by this heat medium, and a desorption (desorption / regeneration) step is performed, whereby the adsorbent has adsorbed water vapor (gas phase adsorption). Quality) will be released and desorbed. At the same time, the pump 41 is operated to the heat exchanger 23a for condensing / evaporating to supply the heat medium at the temperature TM (for example, 40 ° C.) from the heat radiating section 4 through the on-off valve V13 opened by the fourth switching section 9. To do. This heat medium causes the condensation / evaporation heat exchanger 23a to function as a condenser, and the desorbed water vapor is condensed and liquefied mainly by coming into contact with the outer surface of the condensation / evaporation heat exchanger 23a. Then, water (liquid phase adsorbate) accumulates at the bottom of the housing 21a.

  At the same time, the opening / closing valve V6 of the second switching unit 7 is opened for the adsorption / desorption heat exchanger 22b in the adsorption tank 2b (B tank), and the pump 41 is operated to release the heat from the heat radiation part 4. Supply heat medium. The adsorbent of the adsorption / desorption heat exchanger 22b is cooled by the heat medium, and the adsorbent of the adsorption / desorption heat exchanger 22b performs an adsorption process for adsorbing water vapor in the housing 21b. At the same time, with respect to the heat exchanger 23b for condensation / evaporation, the pump 51 is operated, and the heat medium having a temperature TL (for example, 15 ° C.) is supplied from the cooling unit 5 through the on-off valve V16 in which the fourth switching unit 9 is opened. To supply. As a result, the heat exchanger 23b for condensation / evaporation functions as an evaporator, and water accumulated at the bottom of the housing 21b is evaporated due to condensation / liquefaction in the previous process, and condensation / evaporation is caused by the heat of vaporization of this evaporation. The heat medium in the heat exchanger 23b is cooled and the temperature is lowered, and the heat medium having the lowered temperature is returned to the cooling unit 5 through the on-off valve V12 that has opened the third switching unit 8. Then, cold heat is extracted from the heat medium returned to the cooling unit 5 by heat exchange in the cold heat extraction heat exchanger in the cooling unit 5.

  When the time t1 has elapsed (YES in step S3), the batch processing mode Mod in step S2 is terminated, and then the sensible heat exchange mode Mex is performed until the switching condition is satisfied (NO in step S4 and step S5). The passage switching control and the flow of the heat medium in the sensible heat exchange mode Mex (see the thick lines and arrows as in FIG. 4) will be described with reference to FIG. That is, the operation of the pump 31 is stopped, the on-off valve V3 of the first switching unit 6 is closed and the on-off valve V2 is kept open, and both the on-off valves V6 and V7 of the second switching unit 7 are closed. Open V5. In addition, the on-off valve V22 of the bypass passage 12 is opened. Then, the heat pump having the temperature TM is supplied from the heat radiating unit 4 to the adsorption / desorption heat exchanger 22a of the adsorption tank 2a through the passages 42 and 43, the on-off valve V5, and the passage 71a by the pump 41 in the activated state. By this heat medium having the temperature TM, the adsorption / desorption heat exchanger 22a heated by receiving the sensible heat of the heat medium having the temperature TH from the high-temperature heat medium 3 that has been flown in the previous desorption process is cooled. Then, preliminary cooling for the adsorption step of the next step is performed. Subsequently, the heat medium raised in temperature by this heat exchange (up to the maximum temperature TH) passes through the passage 61a, the bypass passage 12 provided with the opened on-off valve V22, the passage 71b, and enters the adsorption tank 2b. Flowed through the adsorption / desorption heat exchanger 22b. With this heated medium, the adsorption / desorption heat exchanger 22b to which the heating medium at the temperature TM has been supplied in the previous adsorption process is heated, and preheating for the next desorption process is performed. .

  On the other hand, on the side of the heat exchangers 23a and 23b for condensation / evaporation, the on-off valve V9 of the third switching unit 8 is closed and the on-off valve V12 is kept open, and the on-off valves V13 and V16 of the fourth switching unit 9 are opened. Both are closed and the on-off valve V15 is opened. In addition, the on-off valve V24 of the bypass passage 14 is opened. Then, the heat pump having the temperature TL is supplied from the cooling unit 5 to the condensation / evaporation heat exchanger 23a of the adsorption tank 2a through the passage 52, the on-off valve V15, and the passage 91a by the pump 51 in the operating state. The heat of the adsorption / desorption heat exchanger 22a that has received the sensible heat of the heat medium of the temperature TM from the heat radiating unit 4 that has been flown in the condensing process is heat-exchanged by the heat medium of the temperature TL. After cooling, preliminary cooling for the next evaporation step is performed. Subsequently, the heat medium raised in temperature by this heat exchange (up to the maximum temperature TM) passes through the passage 81a, the bypass passage 14 provided with the opened on-off valve V24, and the passage 91b, and the adsorption medium 2b. It flows to the heat exchanger 23b for condensation / evaporation. This heated heat medium heats the condensation / evaporation heat exchanger 23b, to which the heat medium of temperature TL has been supplied in the previous evaporation process, and performs preheating for the next condensation process. Is called.

  In short, in sensible heat exchange mode Mex, the sensible heat in the previous process is exchanged between one adsorption tank (for example, 2a) and the other adsorption tank (for example, 2b) in a pair, It is to make effective use for the next process. In the case of simple switching in which the batch processing mode Mod is repeated simply by switching the process, the sensible heat received in the previous process immediately after the process switching is discarded to the outside in the heat radiating unit 4 by heat radiation. By using the sensible heat exchange mode Mex as in the embodiment, the adsorption / desorption heat exchanger 22b on the side switched from the adsorption process to the desorption process is effectively used for the sensible heat that has been discarded in the case of simple switching. Can be preheated. In addition, the adsorption / desorption heat exchanger 22a on the side switched from the desorption process to the adsorption process can be pre-cooled to smoothly advance the next process. Similarly, the condensation process is started by effectively utilizing the sensible heat of the condensation / evaporation heat exchanger 23a that has been in the condensation process until the condensation / evaporation heat exchanger 23b on the side switched from the evaporation process to the condensation process. On the other hand, the condensation / evaporation heat exchanger 23a that is switched from the condensation process to the evaporation process is brought close to the temperature condition (temperature TL) for the evaporation process of the next process, and the next process proceeds. Can be made smooth. In addition, in the case of simple switching, the heat based on the sensible heat of the heat medium at the temperature TM in the condensing process until immediately after the process switching from the condensation / evaporation heat exchanger 23a on the side switched from the condensation process to the evaporation process. Is returned to the cooling unit 5 and not only the sensible heat is discarded but also the cooling efficiency is lowered. According to the present embodiment, as described above, the thermal energy is used effectively as described above. Thus, it is possible to avoid the return of the heat to the cooling unit 5 and improve the efficiency of taking out the heat.

  The completion of the sensible heat exchange mode Mex, that is, the establishment of the switching condition in step S5, is established by detecting that the temperature of the return heat medium passing through the return-side passages 46 and 53 has reached a predetermined temperature. And That is, the passage 46 is provided with a heat medium temperature detecting means 461 for detecting the temperature of the heat medium passing through the inside, and the passage 53 is also provided with a heat medium temperature detecting means 531. Any of the following (1) to (4) can be adopted as a method for establishing the switching condition by detecting the temperature, but in terms of the efficiency of the cold heat generation, priority is given to the temperature detection of (1), that is, It is preferable that the switching condition is satisfied by detecting the temperature in (1) or that the switching condition is satisfied at least including the temperature detection in (1). (1). Detection that the heat medium temperature detecting means 531 in the passage 53 on the side of the heat exchangers 23a and 23b for condensation / evaporation exceeds the set return temperature T1, (2). Detection that the heat medium temperature detecting means 461 in the passage 46 on the adsorption / desorption heat exchangers 22a, 22b side exceeds the set return temperature T2, (3). Either (1) temperature detection or (2) temperature detection, (4). Both (1) temperature detection and (2) temperature detection. As the set return temperature T1, a temperature value close to the temperature TM within the temperature range higher than the temperature TL and lower than the temperature TM is set. If the temperature TM is 40 ° C., for example, a temperature value within a range of 30 to 40 ° C. may be set as the set return temperature T1. Further, as the set return temperature T2, a temperature value close to the temperature TH in the temperature range higher than the temperature TM and lower than the temperature TH is set. If the temperature TH is 80 ° C., for example, a temperature value in the range of 60 to 80 ° C. may be set as the set return temperature T2.

  If the switching condition in step S5 is satisfied (YES in step S5), the process-switched batch processing mode Mod is started (step S6). That is, the batch processing mode Mod in which the adsorption-evaporation process is performed in the adsorption tank 2a (A tank) and the desorption-condensation process is performed in the adsorption tank 2b (B tank) is performed until a predetermined set time t1 elapses (step S6, step S7). NO). The flow of the heating medium in the batch processing mode Mod in step S6 is opposite to that shown in FIG.

  When the time t1 has elapsed (YES in step S7), the batch processing mode Mod in step S6 is terminated, and then the sensible heat exchange mode Mex is performed until the switching condition is satisfied (NO in steps S8 and S9). The flow of the heat medium in the sensible heat exchange mode Mex in step S8 is opposite to that shown in FIG. The contents of the establishment of the switching condition in step S9 are the same as in step S5.

  If the switching condition in step S9 is satisfied (YES in step S9), the process returns to step S2 to switch the process again to perform the batch processing mode Mod, and thereafter repeat step S3 and subsequent steps.

  According to the above, by interposing the sensible heat exchange mode Mex at the time of the process switching when repeating the batch processing mode Mod, it is possible to effectively utilize the sensible heat that has been discarded in the case of simple switching. Each adsorption tank 2a, 2b whose process is switched by the effective use of heat can be brought close to the temperature condition for the next process and the next process can proceed smoothly, and this smooth progress can improve the operation efficiency. In the case of simple switching, the heat is returned to the cooling unit 5 to inhibit the efficiency of taking out the cold, whereas the heat is prevented from returning to the cooling unit 5 and the efficiency of generating the cold can be improved. Various actions and effects can be obtained.

<Other embodiments>
In addition, this invention is not limited to the said embodiment, Other various embodiment is included. That is, in the above-described embodiment, the predetermined temperature detection is applied as the switching condition that is the end timing of the sensible heat exchange mode Mex is applied. However, the present invention is not limited to this, and the predetermined set time t2 ( For example, the switching condition may be satisfied after 20 to 30 seconds).

  Further, regarding the arrangement position of the heat medium temperature detecting means 461 and 531 for performing the temperature detection, the heat exchanger to be subjected to sensible heat exchange (in the sensible heat exchange mode Mex in step S4, adsorption / desorption) The path from the outlet of the heat exchanger 22b for condensation and the heat exchanger 23b for condensation / evaporation to the inlet of the heat radiation part 4 or the cooling part 5 may be used.

It is a mimetic diagram showing an adsorption heat pump concerning an embodiment of the present invention. It is a figure which shows the relationship between the elapsed time in the adsorption tank in an adsorption | suction-evaporation process, and a cold-heat output. It is a flowchart which shows the operation control of an adsorption | suction heat pump. FIG. 2 is a diagram corresponding to FIG. 1 illustrating an example of a flow state of a heat medium in a batch processing mode Mod. FIG. 2 is a diagram corresponding to FIG. 1 illustrating an example of a flow state of a heat medium in a sensible heat exchange mode Mex. It is sectional explanatory drawing which shows the example of an integrated adsorption tank, in order to demonstrate the subject of this invention. It is a schematic diagram which shows the example of the adsorption | suction type heat pump which used a pair of integrated adsorption tanks of FIG.

Explanation of symbols

2a, 2b Integrated adsorption tank 3 High temperature heating medium (heating medium supply source)
4 Heat radiation part (heat medium supply source)
5 Cooling section (heat medium supply source)
6 to 8 Switching portions 11 to 14 Bypass passages 21a and 21b Housings 22a and 22b Adsorption / desorption heat exchangers 23a and 23b Condensation / evaporation heat exchangers 461 and 531 Heat medium temperature detection means Mod Batch processing mode Mex Sensible heat exchange mode

Claims (5)

A pair of integrated adsorption tanks, a heat medium supply system that circulates and supplies a predetermined heat medium to each adsorption tank, and operation control for cold heat generation by switching control of the heat medium supply by this heat medium supply system Each adsorbing tank is provided with an adsorbent capable of switching between adsorbate adsorption and desorption in a housing as a vacuum vessel in which adsorbate is enclosed. A desorption heat exchanger and a condensing / evaporation heat exchanger that is switched between condensing the desorbed adsorbate and evaporating the adsorbate for adsorption. The medium supply system circulates and supplies the heat medium having different temperatures for adsorption / desorption and condensation / evaporation to the adsorption / desorption heat exchanger and the condensation / evaporation heat exchanger in each adsorption tank. The heat medium supply source and the heat medium from each heat medium supply source / To desorption heat exchanger and the condensation / evaporation heat exchanger a sorption heat pump comprising a switching unit for switching the individual and switchably supplying passage and the passage,
As the operation control mode, the operation control means circulates and supplies the heat medium from the heat medium supply source, and is desorbed by the adsorption / desorption heat exchanger of one of the adsorption tanks while being desorbed by the heat exchanger for condensation / evaporation. While performing the desorption-condensation process for condensation, the adsorption-evaporation process for evaporating with the heat exchanger for condensation / evaporation is performed while adsorbing with the adsorption / desorption heat exchanger of the other adsorption tank. The desorption-condensation step and the adsorption-evaporation step are alternately switched between the pair of adsorption tanks, and the batch processing mode is repeated, and the sensible heat is interposed between the pair of adsorption tanks interposed between the process switching. Sensible heat exchange mode to be exchanged,
In the sensible heat exchange mode, the heat medium is transferred from the adsorption tank on the side where the desorption-condensation process is executed in the batch process mode of the previous process to the adsorption tank on the side where the desorption-condensation process is started in the batch process mode of the next process. An adsorption heat pump, characterized in that the flow of the heat medium is controlled so as to flow. The adsorption heat pump according to claim 1,
A bypass passage for flowing a heat medium from one to the other between the two adsorption / desorption heat exchangers in the pair of adsorption tanks, and one between the condensation / evaporation heat exchangers in the pair of adsorption tanks A bypass passage for flowing a heat medium from one to the other,
The operation control means is configured to perform a sensible heat exchange mode by switching the flow of the heat medium so that the heat medium passes through the bypass passage between the pair of adsorption tanks. heat pump. The adsorption heat pump according to claim 1 or 2,
A heating medium temperature detecting means for detecting the temperature of the heating medium on the return side after passing through the adsorption tank on the side where the desorption-condensation process is started in the batch processing mode of the next process;
The operation control means detects that the sensible heat exchange mode has risen to the vicinity of the heat medium temperature supplied in the desorption-condensation process started in the batch process mode of the next process by the heat medium temperature detection means. Adsorption heat pump configured to continue until A pair of integrated adsorption tanks, a heat medium supply system that circulates and supplies a predetermined heat medium to each adsorption tank, and operation control for cold heat generation by switching control of the heat medium supply by this heat medium supply system Each adsorbing tank is provided with an adsorbent capable of switching between adsorbate adsorption and desorption in a housing as a vacuum vessel in which adsorbate is enclosed. A desorption heat exchanger and a condensing / evaporation heat exchanger that is switched between condensing the desorbed adsorbate and evaporating the adsorbate for adsorption. The medium supply system circulates and supplies the heat medium having different temperatures for adsorption / desorption and condensation / evaporation to the adsorption / desorption heat exchanger and the condensation / evaporation heat exchanger in each adsorption tank. The heat medium supply source and the heat medium from each heat medium supply source A passage for supplying the heat exchanger for desorption / desorption and the heat exchanger for condensation / evaporation individually and in a switchable manner and a switching portion for switching the passage, and circulating the heat medium from the heat medium supply source, While performing the desorption-condensation process of condensing with the heat exchanger for condensation / evaporation while desorbing with the adsorption / desorption heat exchanger of one adsorption tank, the adsorption / desorption of the other adsorption tank is performed concurrently. An adsorption-evaporation process is performed by adsorbing with a heat exchanger and evaporating with a heat exchanger for condensation / evaporation, and the desorption-condensation process and the adsorption-evaporation process are alternately switched between the pair of adsorption tanks. An operation control method of an adsorption heat pump that generates cold by repeating batch processing mode,
After the end of the current batch processing mode and before starting the next batch processing mode, the desorption-condensation is performed from the adsorption tank on the side where the desorption-condensation process has been executed in this batch processing mode, in the next batch processing mode. A sensible heat exchange mode is performed in which the flow of the heat medium is switched and controlled so that the heat medium flows to the adsorption tank on the side where the process is started. An operation control method for an adsorption heat pump, wherein the next batch processing mode is started after the replacement. An operation control method for an adsorption heat pump according to claim 4,
After the heat medium flowed from the adsorption tank on the side where the desorption-condensation process is executed in the batch processing mode this time passes through the adsorption tank on the side where the desorption-condensation process is started in the next batch processing mode. Detecting the temperature and executing the sensible heat exchange mode on condition that the temperature of the heat medium has risen to near the temperature of the heat medium supplied in the desorption-condensation process started in the batch process mode of the next process The operation control method of the adsorption heat pump, which ends the above-described batch processing mode.

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