JPH05126432A - Adsorption type air-conditioner - Google Patents

Abstract

PURPOSE:To further improve the efficiency of cooling and heating operation of an adsorption type air-conditioner where cooling and heating are carried out by using latent heat of evaporation and heat of condensation caused by adsorption and desorption of working medium such as water by adsorbent such as zeolite, by setting cycle time optimum for operating conditions. CONSTITUTION:Two or more adsorption type refrigerating units U1 and U2 are installed in parallel and each has a closed container 1 which is filled with working medium Wb and encloses a heat exchanger 2 with adsorbent which absorbs the working medium Wb when cooled by a cooler 12 and desorbs the working medium Wb when heated by a heater 11. Heat-exchange between the working media Wa and Wb takes place at working medium heat exchangers 5 as the working medium Wb is adsorbed and desorbed by the heat exchangers 2, and the heat exchangers 5 are alternately connected to an indoor heat exchanger 22 and an outdoor heat exchanger 21 to perform cooling and heating operation. A temperature detector 41 is provided to detect the outlet temperatures of the heater 11, and tire higher the outlet temperature, the longer the process switching cycle time of the refrigerating units U1 and U2 is set by a controller 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorption type air conditioner for cooling and heating by utilizing latent heat of vaporization and condensation heat associated with adsorption / release of a working medium such as water in an adsorbent such as zeolite. Is.

[0002]

2. Description of the Related Art Generally, in an adsorption type air conditioner (especially, a heat pump type), a working medium that changes in phase between gas and liquid phases is enclosed in a closed container, and the working medium is cooled during cooling by a low temperature heat source. A heat exchanger with an adsorbent, which is adsorbed and has a function of releasing the working medium when heated by a high-temperature heat source, and the operation accompanying the adsorption and release of the working medium by the heat exchanger with the adsorbent. A plurality of adsorption refrigeration units provided with a heat exchanger for working medium, which performs heat exchange with the medium and thereby causes an evaporation or condensation action in the working medium, are arranged in parallel, while each of the adsorption refrigeration units described above. Each working medium heat exchanger of the unit can be reversibly connected to the indoor heat exchanger and the outdoor heat exchanger, and the working medium heat exchanger of the adsorption refrigeration unit in the adsorption stroke during the cooling operation is the indoor heat exchanger. Heat exchange In, the working medium heat exchanger of the adsorption refrigeration unit in the regeneration process is connected to the outdoor heat exchanger, respectively, and during the heating operation, the working medium heat exchanger of the adsorption refrigeration unit in the regeneration process. The indoor heat exchanger, while connecting the working medium heat exchanger of the adsorption refrigeration unit in the adsorption step to the outdoor heat exchanger, respectively, the operation steps of the plurality of adsorption refrigeration units at predetermined intervals. The adsorption process and the regeneration process are alternately switched (see, for example, JP-A-63-46356).

In this case, for example, when the operation of the adsorption refrigeration unit is switched from the adsorption step to the regeneration step, the heating / cooling capacity gradually increases after this switching, and as the adsorbent approaches a saturated state, the capacity is gradually increased. It is decreasing.
Therefore, in order to operate the adsorption-type air conditioner efficiently and continuously, the operation stroke of each adsorption refrigeration unit is switched near the point when this capacity becomes maximum (hereinafter referred to as the optimum point), It is necessary to switch the adsorption refrigeration unit that was in the process to the regeneration process, and the adsorption refrigeration unit that was in the process to the adsorption process (in the following description, the adsorption refrigeration unit The switching time of the operation stroke is called the cycle time). Then, conventionally, it has been customary to fixedly set the cycle time to a predetermined value.

[0004]

However, according to the experiments by the inventors of the present application, the optimum point of the adsorption capacity of the adsorption refrigeration unit, which is the basis for setting the cycle time, is not constant. It has been found that it changes depending on the factors.

The first factor is the temperature of the high temperature heat source involved in the regeneration of the adsorbent. That is, FIG. 5 shows the average cooling capacity characteristics when the temperature of the high temperature heat source is changed to 100 ° C., 150 ° C. and 200 ° C. From FIG. 5, it can be seen that the higher the temperature of the high temperature heat source, the longer the time from the start of operation to the highest cooling capacity (optimal point), that is, the longer the cycle time. FIG. 6 shows the relationship between the cycle time and the temperature of the high temperature heat source in FIG.

The reason why the cycle time of the adsorption refrigeration unit changes in accordance with the temperature of the high temperature heat source is as follows.

That is, since the cycle time of the adsorption refrigeration unit is proportional to the time from the start of adsorption of the adsorbent until the adsorbent reaches a saturated state, the cycle time from the start of the adsorption step in the heat exchanger with the adsorbent to the end ( That is, at the start of the playback process)
It can be said that the cycle time becomes longer as the range of temperature change during the period becomes larger. Therefore, if the temperature of the high-temperature heat source that heats the heat exchanger with the adsorbent in the regeneration process is increased while keeping the temperature conditions other than this constant, the above-mentioned temperature is increased by the amount that the temperature of the high-temperature heat source rises. The range of change increases, resulting in a longer cycle time.

The second and third factors are an outdoor heat exchanger and a room which are reversibly connected to a heat exchanger for working medium which causes evaporation or condensation in the working medium during cooling operation and heating operation. It is the refrigerant temperature at the outlet of the heat exchanger.

First, the second factor is the influence of the refrigerant temperature at the outlet of the outdoor heat exchanger. This is shown in FIG. 7 with the refrigerant temperature at the outlet of the indoor heat exchanger kept constant. The cycle time during the cooling operation when the refrigerant temperature at the outlet of the exchanger is changed is shown by experiment. According to this FIG.
It can be seen that during the cooling operation, the cycle time becomes longer as the refrigerant temperature at the outlet of the outdoor heat exchanger becomes higher. This is for the following reasons.

That is, since the working medium heat exchanger is for evaporating and condensing the working medium, the temperature naturally changes between the adsorption step and the regeneration step of the adsorption refrigeration unit. Therefore, the temperature change width directly affects the cycle time of the adsorption refrigeration unit, and the larger the temperature change width of the working medium heat exchanger is, the longer the cycle time is as in the case of the high temperature heat source. is there.

Since the outdoor heat exchanger is reversibly connected to the heat exchanger for working medium between the cooling operation and the heating operation, for example, during the cooling operation, the regeneration stroke side ( That is, considering the refrigerant temperature at the outlet of the outdoor heat exchanger connected to the working medium heat exchanger of the adsorption refrigeration unit (on the high temperature side), the higher the refrigerant temperature, the more the working medium at the end of the regeneration process. The temperature of the heat exchanger for use becomes high. Therefore, when the temperature on the indoor heat exchanger side is kept constant, the temperature change width of the working medium heat exchanger during the adsorption stroke increases by the increase in the refrigerant temperature, resulting in a longer cycle time. It is a thing.

During the heating operation, the outdoor heat exchanger is connected to the working medium heat exchanger of the adsorption refrigeration unit on the adsorption process side (that is, the low temperature side). Therefore, contrary to the above, the outdoor heat exchanger is The temperature change width of the working medium heat exchanger is reduced by the amount of increase in the refrigerant temperature at the outlet of, and consequently the cycle time is shortened (not shown).

Next, as a third factor, the influence of the refrigerant temperature at the outlet of the indoor heat exchanger is shown in FIG. 8 under the condition that the temperature condition on the outdoor heat exchanger side is constant. , Shows the results obtained by experiments of the change state of the cycle time when the refrigerant temperature is changed during the cooling operation. According to this FIG. 8, it is understood that the cycle time becomes shorter as the refrigerant temperature at the outlet of the indoor heat exchanger rises.

This is because the indoor heat exchanger is connected to the working medium heat exchanger of the adsorption refrigeration unit on the adsorption process side (that is, the low temperature side) during the cooling operation, so that only the increase in the refrigerant temperature is caused. The temperature change width of the working medium heat exchanger is reduced, and as a result, the cycle time is shortened,
The situation is the reverse of that of the outdoor heat exchanger. still,
On the contrary, during the heating operation, the cycle time becomes longer as the refrigerant temperature at the outlet of the indoor heat exchanger becomes higher.

Therefore, in the present invention, the adsorption-type air conditioner capable of realizing more efficient cooling and heating by considering various factors for the cycle time of the adsorption refrigeration unit and setting the optimum cycle time for the operating conditions. It was made as an offer of a machine.

[0016]

As a concrete means for solving such a problem in the invention of the present application, in the invention according to claim 1, as shown in FIG. 1, a closed container 1 in which a working medium W is enclosed. In which the working medium W is adsorbed when cooled by the low temperature heat source 12, and the adsorbent 3 is provided which acts so as to release the working medium W when heated by the high temperature heat source 11; Adsorption refrigeration unit U _{1 including} heat exchangers 5 and 5 for working medium that exchange heat with the working medium W as the working medium W is adsorbed and released by the heat exchangers 2 and 2 with an adsorbent. , U ₂ are arranged in parallel, while the heat exchangers 5 for working medium of the adsorption refrigeration units U ₁ , U ₂ are arranged.
5 is reversibly connectable to the indoor heat exchanger 22 and the outdoor heat exchanger 21, and the operation steps of the plurality of adsorption refrigeration units U ₁ and U ₂ are divided into adsorption steps and regeneration steps at predetermined intervals. In the adsorption type air conditioner which is alternately switched between the two, the temperature detection means 41 for detecting the outlet temperature of the high temperature heat source 11 and the higher the temperature, the operation process of each of the adsorption refrigeration units U ₁ and U ₂ . And a control means 10 for setting a long switching time.

According to the second aspect of the present invention, as illustrated in FIG. 1, an adsorbent 3 for adsorbing and releasing the working medium W is provided in a closed container 1 in which the working medium W is enclosed. The heat exchangers 2 and 5 with agent, and the heat exchangers 5 and 5 for working medium that perform heat exchange with the working medium W as the working medium W is adsorbed and released by the heat exchanger 2 with adsorbent. preparative adsorption refrigeration unit U ₁ having a, while the U ₂ to multiple Motonami set, respective adsorption refrigeration unit U _1, the heat exchanger 5, 5 for each working medium U ₂ the indoor heat exchanger 22 and the outdoor heat It can be reversibly connected to the exchanger 21 and has a plurality of adsorption refrigeration units U ₁ and U ₁ .
_In the adsorption type air conditioner in which the _second operation step is alternately switched between the adsorption step and the regeneration step at a predetermined interval, the temperature detection means 42 for detecting the refrigerant temperature at the outlet of the outdoor heat exchanger 21. And a control means 10 for setting the switching time of the operation stroke of each of the adsorption refrigeration units U ₁ , U ₂ longer as the refrigerant temperature is higher during the cooling operation and as the refrigerant temperature is lower during the heating operation. It has a feature.

According to the third aspect of the present invention, as shown in FIG. 1, the adsorption is provided with the adsorbent 3 for adsorbing and releasing the working medium W in the closed container 1 in which the working medium W is enclosed. The heat exchangers 2 and 5 with agent, and the heat exchangers 5 and 5 for working medium that perform heat exchange with the working medium W as the working medium W is adsorbed and released by the heat exchanger 2 with adsorbent. preparative adsorption refrigeration unit U ₁ having a, while the U ₂ to multiple Motonami set, respective adsorption refrigeration unit U _1, the heat exchanger 5, 5 for each working medium U ₂ the indoor heat exchanger 22 and the outdoor heat It can be reversibly connected to the exchanger 21 and has a plurality of adsorption refrigeration units U ₁ and U ₁ .
_In the adsorption type air conditioner in which the operation stroke of ₂ is alternately switched between the adsorption stroke and the regeneration stroke at a predetermined interval, the temperature detection means 43 for detecting the refrigerant temperature at the outlet of the indoor heat exchanger 22. And a control means 10 for setting a longer switching time between the operation steps of the adsorption refrigeration units U ₁ and U ₂ as the refrigerant temperature is lower during the cooling operation and higher when the heating operation is performed. It has a feature.

[0019]

With each of the inventions of the present application, the following effects can be obtained by adopting such a configuration.

According to the first aspect of the present invention, the higher the temperature of the high temperature heat source 11 for heating the adsorbent 3 in the regeneration process, the higher the temperature of the adsorption refrigerating units U ₁ and U ₂ is when the operation process is switched (that is, the cycle time). Is set to be short, the adsorption and refrigeration units U ₁ and U are always operated under optimum performance, and as a result, optimum cooling / heating performance can be obtained in the entire temperature range of the high temperature heat source 11. is there.

In the second aspect of the present invention, the higher the temperature of the refrigerant at the outlet of the outdoor heat exchanger 21 during the cooling operation, and the lower the temperature of the refrigerant during the heating operation, the adsorption refrigeration units U ₁ , U. _By controlling the cycle time of ₂ to be long, efficient cooling or heating operation is performed under optimum conditions corresponding to the outside temperature.

According to the third aspect of the invention, the higher the refrigerant temperature at the outlet of the indoor heat exchanger 22 during the cooling operation, and the lower the refrigerant temperature during the heating operation, the adsorption refrigeration units U ₁ , U. _By controlling the cycle time of ₂ to be short, efficient cooling or heating operation is performed under optimal conditions corresponding to room temperature.

[0023]

Therefore, according to the adsorption type air conditioner of each invention of the present application, the cycle time of each adsorption refrigeration unit is set to the optimum operating state according to various conditions such as the temperature of the high temperature heat source or the outside air temperature. Therefore, efficient heating and cooling with less heat loss can be realized.

Further, in a system in which the cycle time is changed and set according to the temperature of the high temperature heat source, a system using waste heat whose temperature greatly changes with time, for example, as a high temperature heat source, When it does, the effect is more remarkable.

Further, in the one in which the cycle time is changed and set in accordance with the refrigerant temperature at the outlet of the outdoor heat exchanger, for example, in an area having a weather condition in which the outside air temperature greatly changes during the day. The effect is particularly remarkable when used.

Further, the one in which the cycle time is changed and set in accordance with the refrigerant temperature at the outlet of the indoor heat exchanger is used, for example, in an environment in which the indoor temperature greatly changes due to a large increase or decrease in indoor personnel. In that case, the effect is particularly remarkable.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The adsorption type air conditioner of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. In FIG. 1, a first adsorption refrigeration unit U ₁ and a second adsorption refrigeration unit U described later are shown. An adsorption air conditioner with ₂ and is shown. Each of the adsorption and refrigeration units U ₁ and U ₂ has the same structure, and the structure thereof is the first adsorption and refrigeration unit U 1.
Taking ₁ as an example, the first adsorption refrigeration unit U ₁
Is constructed by incorporating two types of heat exchangers 2, 5 in a closed container 1 filled with a working medium W such as water, which changes its phase between a gas phase and a liquid phase. One of the two heat exchangers 2 and 5 adsorbs or discharges the gaseous working medium Wb according to the temperature of the fluid supplied from the heater 11 or the cooler 12 described later. It is a heat exchanger with an adsorbent to which an adsorbent 3 such as zeolite or silica gel is attached. On the other hand, the other heat exchanger 5
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 is evaporated, and cools the working medium W when the working medium W is condensed. Is. In the heat exchanger with adsorbent 2, the adsorbent 3 of this heat exchanger with adsorbent adsorbs the working medium W to the adsorbent 3 of the heat exchanger with adsorbent in accordance with the switching of the first four-way switching valve 31 and the second four-way switching valve 32. The fluid F ₁ for producing the fluid F ₂ for producing the release action of the working medium W from the cooler 12 or on the adsorbent 3
Are selectively supplied from the heater 11.

In the working medium heat exchanger 5, the liquid working medium Wa is vaporized when the working medium is adsorbed by the adsorbent 3 in accordance with the switching of the third four-way switching valve 33 and the fourth four-way switching valve 34. The fluid F ₃ that acts to receive cold heat from the working medium W during the evaporation cools the gaseous working medium Wb released from the outdoor heat exchanger 21 or from the adsorbent 3 to condense the working medium Wb. The acting fluid F ₄ is the indoor heat exchanger 22.
From here, it is supplied selectively. The fluid F ₃ and the fluid F ₄ correspond to the refrigerants in the claims.

In the thus configured first adsorption refrigeration unit U ₁ and second adsorption refrigeration unit U ₂ , the heat exchangers with adsorbents 2, 2 have the first four-way switching valve 31 and the second adsorption refrigeration unit 31, respectively. Depending on the switching of the four-way switching valve 32, the heater 11 and the cooler 12
And the working medium heat exchangers 5, 5 are connected to the third four-way switching valve 33 and the fourth four-way switching valve 3 respectively.
By selectively connecting to the outdoor heat exchanger 21 and the indoor heat exchanger 22 in accordance with the switching of No. 4, one cooling / heating system capable of continuous operation is configured.

Further, each of the four-way switching valves 31 to 34 is controlled to be switched based on a control signal from the controller 10. Of these, the first four-way switching valve 31 and the second four-way switching valve are included. The switching valve 32 is switched at a predetermined cycle time as described later, and the second adsorption refrigeration unit U ₂ connected to the heater 11 side is a regeneration process side unit for releasing the working medium from the adsorbent 3, The first adsorption refrigeration unit U ₁ connected to the cooler 12 side is an adsorption stroke side unit for adsorbing the working medium to the adsorbent 3. Note that FIG. 1 shows a state in which the first adsorption refrigeration unit U ₁ is in the adsorption step and the second adsorption refrigeration unit U ₂ is in the regeneration step. In this embodiment, the first four-way switching valve 31 and the second four-way switching valve 32 correspond to the switching means in the claims.

On the other hand, when the user selects the cooling operation or the heating operation for the third four-way switching valve 33 and the fourth four-way switching valve 34, the cooling operation is performed in the controller 10. Outdoor heat exchanger 2 if selected
1 is connected to the working medium heat exchanger 5 of the adsorption refrigeration unit on the regeneration stroke side, and the indoor heat exchanger 22 is connected to the working medium heat exchanger 5 of the adsorption refrigeration unit on the adsorption stroke side, and vice versa. Outdoor heat exchanger 2 when is selected
1 is connected to the working medium heat exchanger 5 of the adsorption refrigeration unit on the adsorption process side, and the indoor heat exchanger 22 is connected to the working medium heat exchanger 5 of the adsorption refrigeration unit on the regeneration process side.
The valve switching position is controlled in relation to the switch selection and the switching of the operation strokes of the adsorption refrigeration units U ₁ and U ₂ . Note that FIG. 1 shows a connection state of the outdoor heat exchanger 21 and the indoor heat exchanger 22 during cooling.

The heater 11 corresponds to the high temperature heat source in the claims, and is composed of, for example, a solar water heater or a boiler using hot waste water. Also,
The cooler 12 uses the fluid F from the outdoor heat exchanger 21.
₃ by heat exchange with are configured in the heat exchanger acting as cooling the fluid F _1.

Next, the operation of the thus constructed adsorption type air conditioner will be described by taking the cooling operation as an example. First, the first four-way switching valve 31 and the second four-way switching valve 32 are illustrated. 1, the low temperature fluid F ₁ from the cooler 12 is fed to the heat exchanger 2 with the adsorbent of the first adsorption refrigeration unit U ₁ and the high temperature fluid F ₂ from the heater 11 is fed to the first heat exchanger ₂ . The second adsorption refrigeration unit U ₂ is supplied to the heat exchanger 2 with an adsorbent, and the first adsorption refrigeration unit U ₁ is in the adsorption process of adsorbing the gaseous working medium Wb by the adsorbent 3, and conversely the second adsorption refrigeration unit U ₁ . The adsorption refrigeration unit U ₂ is in the regeneration process for releasing the gaseous working medium Wb adsorbed by the adsorbent 3.

On the other hand, during the cooling operation, the third four-way switching valve 33 and the fourth four-way switching valve 34 serve as the outdoor heat exchanger 21.
The adsorption refrigeration unit (in this state, the second
The indoor heat exchanger 22 is used as the working medium heat exchanger 5 of the adsorption refrigeration unit U ₂ ) and the indoor heat exchanger 22 is used as the working medium heat exchanger 5 of the adsorption refrigeration unit (in this state, the first adsorption refrigeration unit U ₁ ). The switching positions are set so that they can be connected to each other.

Therefore, in the state shown in FIG. 1, in the first adsorption refrigeration unit U ₁ , the liquid working medium Wa is continuously evaporated by the adsorbing action of the adsorbent 3, and the working medium Wa is The fluid F that lowers the temperature and is thereby supplied from the indoor heat exchanger 22 to the working medium heat exchanger 5
₄ is cooled, and indoor cooling is performed in the indoor heat exchanger 22.

On the other hand, in the second adsorption refrigeration unit U ₂ , the high temperature fluid F ₂ from the heater 11 is supplied to the heat exchanger 2 with an adsorbent, and the adsorbent 3 is heated and the adsorbent 3 is adsorbed. The working medium Wb adsorbed in the agent 3 is released. Gaseous working medium Wb released from the adsorbent 3
Are sequentially condensed by the fluid F ₃ supplied from the outdoor heat exchanger 21 to the working medium heat exchanger 5. Therefore, the working medium is released from the adsorbent 3 continuously.

When the cooling operation in which the first adsorption refrigeration unit U ₁ is used as the adsorption process and the second adsorption refrigeration unit U ₂ is used as the regeneration process is continued to some extent, the adsorbent of the first adsorption refrigeration unit U ₁ is adsorbed. 3 gradually approaches the saturated state, the adsorbing action of the working medium decreases, and the cooling capacity in the indoor heat exchanger 22 decreases. Therefore, in this case, the operation stroke of each of the adsorption refrigeration units U ₁ and U ₂ is switched by switching the valve positions of the first four-way switching valve 31 and the second four-way switching valve 32, and adsorption is performed up to now. The first adsorption / refrigeration unit U ₁ in the stroke is switched to the regeneration stroke, and the second adsorption / refrigeration unit U ₂ in the regeneration stroke is switched to the adsorption stroke to enable continuous cooling operation. The adsorption refrigeration unit U ₁ , U ₂
The valve positions of the third four-way switching valve 33 and the fourth four-way switching valve 34 are also switched in accordance with the switching of the operation stroke of No. 3, and this time the outdoor heat exchanger 21 operates the first adsorption refrigeration unit U ₁ . It goes without saying that the indoor heat exchanger 22 is connected to the medium heat exchanger 5 and is connected to the working medium heat exchanger 5 of the second adsorption refrigeration unit U ₂ .

By the way, in order to continuously secure a high cooling capacity, the operation steps of the two adsorption refrigeration units U ₁ and U ₂ are alternately switched at a certain cycle time. Therefore, it was fixed at the set value. However, the cycle time at which the optimum performance is achieved is not constant, but changes according to various operating factors. Therefore, if the cycle time is fixed to a constant value as in the conventional case, heat loss will increase and efficiency will increase. As mentioned above, it is not possible to realize the ideal driving.

The cycle time at which this optimum performance is obtained is mainly the temperature of the high temperature fluid F ₂ supplied from the heater 11 and promoting the regeneration action of the adsorbent 3 in the regeneration process, and the outlet of the outdoor heat exchanger 21. The temperature depends on the temperature of the fluid F ₃ (in other words, the outside air temperature) and the temperature of the fluid F _{4 at} the outlet of the indoor heat exchanger 22 (in other words, the indoor temperature). Regarding the temperature of the fluid F _2, the higher the temperature, the longer the optimum cycle time, and regarding the temperature of the fluid F ₃ , the longer the temperature, the longer the optimum cycle time.
Regarding the temperature of _4, the higher the temperature is, the shorter the optimum cycle time is, and the reason is as described above (refer to the "Problems to be solved by the invention" section and Figs. 5 to 8). ..

From the above, in order to operate the device with optimum performance at all times regardless of changes in operating conditions and realize more efficient cooling and heating performance, the cycle time is changed in accordance with each temperature ( That is, the first four-way switching valve 31 and the second
It suffices to change the interval time of switching of the four-way switching valve 32. Therefore, in this embodiment, as shown in FIG. 1, the outlet side of the heater 11 and the outlet side of the outdoor heat exchanger 21 and the room. The temperature sensors 41, 42, 43 are arranged at any one of the outlet sides of the heat exchanger 22, and depending on the temperature of the high temperature fluid F ₂ ,
Alternatively, the cycle time is changed and set depending on the temperature of the fluid F ₃ or the temperature of the fluid F ₄ so that the apparatus can always be operated with optimum performance.

For example, when the cycle time is controlled by the temperature of the hot fluid at the outlet of the heater 11,
As shown in the flowchart of FIG. 2, after the control is started, the current outlet temperature (T) of the heater 11 and the current cycle time (ta) are first read (step S1). Next, the optimum cycle time corresponding to the current outlet temperature (T) of the heater 11
(tb) is read from the map (see FIG. 6) (step S2).
Then, the present cycle time (ta) is compared with the optimum cycle time (tb) corresponding to the present temperature condition (step S3), and if (ta) ≠ (tb), the present cycle time Is set to the optimum cycle time read (step S4).

By continuously performing such cycle time change control during the operation of the apparatus, the adsorption type air conditioner is always operated in a state of exhibiting optimum performance, so that high efficiency with less heat loss is achieved. The air-conditioning operation of is realized.

When the cycle time change control is performed according to the outlet temperature of the heater 11 as described above,
For example, the effect is particularly remarkable in a system that uses, as a high-temperature heat source, heat such as waste heat of a boiler that has a large temperature change with time even in one day.

The same applies to the case where the cycle time is controlled according to the outlet temperature of the outdoor heat exchanger 21 or the outlet temperature of the indoor heat exchanger 22, and therefore the outdoor heat exchanger 21 is shown in FIG. Flow of control based on the outlet temperature of
The charts are limited to presenting the control flow chart based on the outlet temperature of the indoor heat exchanger 22 in FIG.
Detailed description thereof will be omitted.

[Brief description of drawings]

FIG. 1 is an overall system diagram of an adsorption type air conditioner according to an embodiment of the present invention.

FIG. 2 is a control flow chart in a first control example of the adsorption type air conditioner shown in FIG.

FIG. 3 is a control flowchart in a second control example of the adsorption type air conditioner shown in FIG.

FIG. 4 is a control flowchart in a third control example of the adsorption type air conditioner shown in FIG.

FIG. 5 is a correlation diagram between the cooling capacity and the cycle time when the high temperature heat source temperature is changed.

FIG. 6 is a correlation diagram between cycle time and high temperature heat source temperature.

FIG. 7 is a characteristic diagram of cycle time when the temperature of the outdoor heat exchanger is changed.

FIG. 8 is a characteristic diagram of cycle time when the temperature of the indoor heat exchanger is changed.

[Explanation of symbols]

1 is a closed container, 2 is a heat exchanger with an adsorbent, 3 is an adsorbent, 5
Is a heat exchanger for working medium, 10 is a controller, 11 is a heater,
12 is a cooler, 21 is an outdoor heat exchanger, 22 is an indoor heat exchanger, 31 to 34 are four-way switching valves, 41 is a temperature sensor for heat source, 42 is a temperature sensor for outside air temperature, 43 is a temperature sensor for room temperature, U ₁ and U ₂ are adsorption refrigeration units.

Claims (3)

[Claims] 1. A closed container containing a working medium (W).
In (1), an adsorbent (3) that acts so as to adsorb the working medium (W) when cooled by the low temperature heat source (12) and release the working medium (W) when heated by the high temperature heat source (11). (2) with an adsorbent, and a heat exchanger with an adsorbent
(2), a working medium heat exchanger (5), (5) for exchanging heat with the working medium (W) according to adsorption and release of the working medium (W) While a plurality of adsorption refrigeration units (U ₁ , U ₂ ) are installed in parallel, each adsorption refrigeration unit (U ₁ ),
Replace the heat exchangers (5) and (5) for each working medium of (U ₂ ) with the indoor heat exchanger.
(22) and the outdoor heat exchanger (21) can be reversibly connected to each other, and the plurality of adsorption refrigeration units (U ₁ ),
An adsorption type air conditioner in which the operation stroke of (U ₂ ) is alternately switched between an adsorption stroke and a regeneration stroke at a predetermined interval, the temperature detection detecting the outlet temperature of the high temperature heat source (11). Adsorption means comprising means (41) and control means (10) for setting the switching time of the operation stroke of each of the adsorption refrigeration units (U ₁ ) and (U ₂ ) longer as the temperature is higher. Type air conditioner. 2. A closed container containing a working medium (W).
An adsorbent that adsorbs / releases the working medium (W) in (1)
(3) Adsorbent-equipped heat exchanger (2), (2), and the working medium (W) adsorbed and released by the adsorbent-equipped heat exchanger (2) Adsorption refrigeration unit (U ₁ , equipped with a working medium heat exchanger (5), (5) for exchanging heat with
U ₂ ), a plurality of U ₂ ) are arranged in parallel, and each of the adsorption refrigeration units
The heat exchangers (5) and (5) for working media (U ₁ ) and (U ₂ ) are reversibly connectable to the indoor heat exchanger (22) and the outdoor heat exchanger (21). , A plurality of adsorption refrigeration units described above
An adsorption type air conditioner in which the operation steps of (U ₁ ) and (U ₂ ) are alternately switched between an adsorption step and a regeneration step at predetermined intervals, the outdoor heat exchanger (21) A temperature detecting means (42) for detecting the refrigerant temperature at the outlet, and the adsorbing / refrigerating unit (U ₁ ), the higher the refrigerant temperature during the cooling operation and the lower the refrigerant temperature during the heating operation.
Control means for setting the switching time of the operation stroke of (U ₂ ) to be long (1
0) and an adsorption type air conditioner. 3. A closed container containing a working medium (W).
An adsorbent that adsorbs / releases the working medium (W) in (1)
(3) Adsorbent-equipped heat exchangers (2), (2), and the working medium (W) accompanying adsorption and release of the working medium (W) by the adsorbent-equipped heat exchanger (2) An adsorption refrigeration unit (U ₁ , equipped with a working medium heat exchanger (5), (5) for exchanging heat with
U ₂ ), a plurality of U ₂ ) are arranged in parallel, and each of the adsorption refrigeration units
The heat exchangers (5) and (5) for working media (U ₁ ) and (U ₂ ) are reversibly connectable to the indoor heat exchanger (22) and the outdoor heat exchanger (21). , A plurality of adsorption refrigeration units described above
An adsorption type air conditioner in which the operation strokes of (U ₁ ) and (U ₂ ) are alternately switched between an adsorption stroke and a regeneration stroke at predetermined intervals, the indoor heat exchanger (22) A temperature detecting means (43) for detecting the refrigerant temperature at the outlet, and the lower the refrigerant temperature during the cooling operation and the higher the refrigerant temperature during the heating operation, the higher the refrigerant temperature of the adsorption refrigeration units (U ₁ ) and (U ₂ ) is. An adsorption air conditioner comprising: a control means (10) for setting a switching time of an operation stroke to be long.