JPH0350465A - Control of air conditioner - Google Patents

Abstract

PURPOSE:To improve the operation efficiency of a compressor by connecting two or more metal containers each containing therein hydrogenated metal through the compressor or a pump, and performing intermittent operation or capacity increase/decrease operation of the compressor in a high efficiency region of the compressor using a timer. CONSTITUTION:A hydrogenated metal (MH1) 2 is contained in a metal container 1, and a hydrogenated metal (MH2) 4 is contained in a metal container 3. On the basis of the set time to a timer T included in a control device 22, there are controlled the on-off timings of first and second valves V1, V2 and start timing of the compressor 6 or operation time of the same after it is started, and further interruption time of the compressor 6. By repeatedly performing the intermittent operation of the compressor 6 following set time t0-tn set to the timer T, the compressor 6 can intermittently be operated only in a high region of efficiency n of the compressor 6 to sharply improve the efficiency of the compressor as a whole.

Description

[Detailed Description of the Invention] "Field of Application in the R Industry" This invention relates to a method for controlling air conditioning equipment that utilizes the endothermic and exothermic actions of metal hydrides. [Prior Art] In general, single metals or It is known that alloys (hereinafter simply referred to as metals) absorb hydrogen and form metal hydrides.They also release hydrogen reversibly at the operating temperature.Hydrogen is released from these metal hydrides. The process of absorbing hydrogen is an endothermic process, and conversely, the process of absorbing hydrogen is an exothermic process.In other words, the relationship is: release (Mit) 1Q: (M) + nt absorption (M indicates a metal or an alloy) Here, if the hydrogen atmospheric pressure is increased or the atmospheric temperature is lowered relative to the metal (M), it becomes easier to absorb hydrogen (the above-mentioned leftward reaction).
-1 > hydrogen atmosphere 17 ft.l. 1 {If the force is lowered or the ambient temperature is raised, it becomes easier to release hydrogen (rightward reaction in the previous equation). A heating and cooling device using the above principle was disclosed in Japanese Patent Application Laid-Open No. 119955/1986>71
There is something that has been done. The principle of this heating and cooling system is that metal hydrides (Mlll)2, (MH2)4 are
Two interchangeable metal containers with built-in 2i! During 1.3, turn on the compression 816 (or pump), switch and reverse the flow of hydrogen from the self-compression R6, and cool the metal hydride MHI through the metal container 1 in which hydrogen is being released. Metallic volume 8 in which hydrogen is in the process of occluding hydrogen in compound M }l 2
Heating is performed via 3. [Problem to be Solved by the Invention] However, in the above-mentioned air conditioning system, when the compressor attempts to forcibly remove hydrogen from the metal hydride MHI during cooling, the efficiency of the compressor is extremely reduced. was there. That is, when the hydrogen atmosphere pressure P in the low-pressure side metal container 1 is P1 as shown in FIG.
Assuming that hydrogen begins to be removed and the force inside the metal container 1 is reduced, the hydrogen release reaction is activated in the metal container 1 and heat absorption progresses, so the pressure automatically decreases as shown in the figure. When it reaches a low pressure P2, it becomes saturated,
After that, even if the compression vA6 continues to be operated, the compression 1! A problem with the QI body is that the discharge amount decreases and the compressor efficiency η (ratio of the hydrogen discharge profile to the deception energy) decreases to the i-end as shown in FIG. In order to solve the above-mentioned problem, the applicant of the present application has recently proposed that when the detection signal from the efficiency sensor that indirectly detects the efficiency of the compressor, such as the pressure of the hydrogen atmosphere inside the metal container, reaches the first set value,
An operation of stopping the compressor or reducing its capacity, and then starting the pressure am or increasing its capacity when the detection signal from the efficiency sensor becomes a second setting value higher than the first setting chain. By alternately performing LL a
We have invented a control method that allows operation only in areas with high efficiency. However, although this control method has the excellent effect of improving operational efficiency, it requires the use of an expensive sensor equipped with explosion-proof measures to detect the pressure of highly explosive hydrogen inside the metal container. Another problem arose in that it was not possible to reduce the cost of the control device, as the number of input contacts increased in terms of control. An object of the present invention is to provide a method of controlling an air-conditioning device that can improve the operating efficiency of a compressor using an inexpensive control device. [Means for solving the problem] In order to achieve the above object, this starter 1 connects two or more metal containers containing a metal hydride through a compressor or a bong 1, and the metal container has a Each is equipped with a heat exchanger,
A cold I! indoor heat exchanger is connected to the heat exchanger. ! In the compressor device, after the compressor or pump is started, the compressor or pump is operated for a predetermined time set by a timer, and when the timer times out, the compressor or pump is stopped or its capacity is reduced. The present invention employs a method of alternately performing an operation of starting the compressor or pump or increasing its capacity after a predetermined period of time set by a timer has elapsed from this operation. Since the compressor is operated intermittently or the capacity is increased or decreased in the region where the efficiency of the compressor is high, it is possible to improve the operating efficiency of the pressure faR, and the control device only needs to use a timer. ,
It can be manufactured at low cost. [Example] Hereinafter, an example that embodies this invention will be described based on FIGS. 1 and 2. As shown in Figure 2, metal hydride (M
}11) 2 is housed in the metal container 3, and a metal hydride (MH2) 4 is housed in the metal container 3. After the air inside both containers is replaced with nitrogen gas, it is further replaced with hydrogen gas, and hydrogen is supplied from a hydrogen supply port (not shown) so that only metal container L is saturated with hydrogen, making it a completely sealed type. ．． Both metal containers 1 and 3 are communicated by a forced transfer pipe 5, and a first valve 1 and a compressor 6 are installed in the transfer pipe 5. Then, the first valve V1 is opened and the pressure WJn is
6 is operated, the pressure inside the metal container 1 is reduced, and at the same time, the inside of the metal container 3 is pressurized. At this time, hydrogen flows from the metal container 1 to the metal container 3 through the forced transfer pipe 5 and the first valve V1, and the metal hydride (M}II)
The hydrogen released from the metal container 1 is absorbed into the gold-flexible hydride (M}12>4. In this process, the temperature inside the metal container 1 decreases,
The temperature of metal container 3 rises by -E. Said metal hydride M]! 1. As MH2, for example 'T
'iMn+. s H2.7 or L a N
i sH-. There is a 1st prize. Further, all hydrogen storage alloys capable of storing hydrogen are included in the present invention.

Furthermore, the pressure difference between the two metal containers 1.3 is 8! LJ tube 7
The valves are connected to each other by the valves V2 and can be opened and closed by the second valve V2. Each of the metal containers 1.3 is provided with a ripening exchanger 9.10, and both of the heating medium exchangers 9 and 10 are connected to the ripening medium switch all via a pipe line, and the heating medium switching device 11
Is there a heat medium TL? It is connected to a heat exchanger 14 equipped with an air blower 13 via a tTM device 12. Further, a heat exchanger 815 equipped with an air blower 17 is connected to the heat medium switching device 11 via a sad medium circulator 16. And metal container #t
The reduced temperature inside ii is sent to the heat exchanger 14 by the heat medium cutoff FA2911 and the heat medium circulator l2 by the heat exchanger 9 in the metal container 1, and sent into the room by the blower 13,
It is possible to cool the room in the summer. On the other hand, the increased temperature inside the metal container 3 is transferred to the heat exchanger 15 by the heat medium switching device 1l and the heat medium circulator 16 by the heat exchanger lO in the metal container 3.
It is then transported indoors using a blower 17, and is heated indoors during the winter. It can be used for rooms. A computer is connected to the compressor 6 by a lead wire 21.
61 is connected to the controller W22 for 1'tc. Then, based on the timer T built in the control device 22, 3<fixed time, the first . The opening/closing timing of the second valves Vl and V2, the starting timing of the compressor 6 or the operating time after starting, and the stopping time of the compressor 6 are controlled by It/J. Next, we will explain the operation of the air-conditioning system constructed as described above. Now, when the pressure in the metal container at is high and the pressure n in the metal container 3 is low, when the second valve v2 is released rJM at time to in FIG. 1 by a command from the control device 22, Hydrogen moves from metal hydride M}11 to metal hydride MH2 due to the pressure difference. Further, in synchronization with the opening of the second valve V2, the timer 1' starts counting, and after a predetermined time (t1) has elapsed, that is, both metal containers 1.
At the time when the hydrogen atmosphere pressure P in 3 becomes equal to the pressure P1, the second valve 2 of the IF force difference transfer pipe 7 is closed by a command from the cn control device 22, and the first valve V1 is opened. , and start compression R6. Then, the compressor 6 forcibly moves the hydrogen from the metal container 1 to the MII 2, and the interior of the metal container 1 is further cooled and the interior of the metal container 3 is further heated. The time tl until the activation of the pressure 11I116 is the hydrogen atmosphere pressure F in the metal container 1)
Since the time required for pressure to reach P1 is known in advance, it is set to be the same as that time. In synchronization with the activation of the compression fi6 (time tl), the control device I
! The timer T of 22 starts counting again, and when the set time (t2) elapses and the time is up, the control device 22
A stop signal is output from the compressor 6 to the compressor 6, and the compressor 6 is stopped. The time until this stop is also set to be the same as the time required for the hydrogen atmosphere pressure P in the metal container 1 to go from P1 to the lowest pressure P2 since it is known in advance. Then, in synchronization with the stopping operation of the compressor 6, the timer 1' starts counting again, and the pressure #1816 is stopped until the set time t3 elapses and the time is up. During this period, heat exchange progresses inside the metal hydride MHI in the metal container 1, its temperature rises, and the hydrogen atmosphere pressure P in the metal container 1 also reaches P3, which is higher than ■)2, and at this point t3, the timer T is activated. When the time is up, the control device 22
From pressure 1? A start signal is output to l@6, compressor R6 is restarted, and hydrogen is converted from metal hydride MHI to M H2
/\Forcibly moved. Regarding the time until this startup (t3), the hydrogen atmosphere pressure I》 inside the metal container 1 is 1〕2
Since the time required for the pressure to reach the higher pressure P3 is known in advance, the time and rotation are determined in advance. Furthermore, the said tie? -1 starts counting from time L3, and when a predetermined time <t4) has elapsed and the hydrogen atmosphere pressure P reaches P2, which is lower than P3, the control device 22 sends a stop signal to the compression R6 again, and the compressor 6 starts. The operation is stopped, and the hydrogen atmosphere pressure P in the Konkutsu container 1 is increased from P2 to P3. By repeating the above-described intermittent operation of the compressor 6 according to the setting interval to to un set by the timer 1', compression is achieved only in the region where the efficiency η of the compressor 6 is high, as shown in Fig. 1. The compressor 6 can be operated intermittently, and the efficiency of the compressor as a whole can be greatly improved. After the above-mentioned operations are completed, hydrogen is transferred from the metal container 3 to the metal container 1 by the pressure difference transfer g7 by an operation completely opposite to the above-mentioned operation, and then it is forcibly transferred by the compression fi6. Hydrogen is transferred, and metal container 3 is opened to perform a cooling action, and metal container 1 11QI is used to perform a cooling action.
In this case as well, the compressor 6 is operated intermittently in the same way as the operation described in 1 above by the previous timer 'I', so that the efficiency of the compressor increases to 161+. Note that this invention can also be embodied as follows. In the example described in fl+l, the intermittent operation of compression 1fi6 was repeated for a certain period of time, but instead of repeating this a predetermined number of times, or instead of intermittent operation of the compressor 6, the capacity of the compressor could be increased stepwise or continuously. To increase or decrease.

[Effects of the Invention] As described above, the present invention can control the operating efficiency of the compressor or pump by intermittent operation or capacity increase control of the compressor or pump, and Since it is controlled by the timer, it has the effect of reducing the cost of the control device.

[Brief explanation of drawings]

Fig. 1 is a graph for explaining the compressor operation control method in the air-conditioning system of the present invention, Fig. 2 is a schematic diagram showing an embodiment of the air-conditioning system, and Fig. 3 is a graph of the conventional air-conditioning system. FIG. 4, which is a schematic concave diagram without showing the basic structure, is a graph showing the relationship between the conventional hydrogen atmosphere pressure and the efficiency of the compressor.

Claims (1)

[Scope of Claims] 1. Two or more metal containers containing metal hydrides are connected via a compressor or a pump, each of the metal containers is provided with a heat exchanger, and the heat exchanger is equipped with a heat exchanger for indoor use. A heat exchanger is connected, and hydrogen is released from the metal hydride in the metal container whose pressure is reduced when the compressor or pump is driven, and this hydrogen is stored in the metal hydride in another metal container whose pressure is increased. In an air conditioning system that performs cooling and heating using low and high temperatures obtained from the process as a heat source, after the compressor or pump is started, the compressor or pump is operated for a predetermined period of time set by a timer, and when the timer times out. , an air-conditioning/heating system in which the operation of stopping the compressor or pump or reducing its capacity and the operation of starting the compressor or pump or increasing its capacity after a predetermined time set by a timer has elapsed from this operation are performed. How to control the device.