JPH02238264A - Remote starting/stopping device - Google Patents

Abstract

PURPOSE:To standardize a controller by processing start/stop signal with the same circuit in case of a normally open contact or a normal closure contact as a remote start/stop signal of an absorption refrigerator. CONSTITUTION:If a b-contact 45 is provided in a remote controller R and a changeover switch 40 is turned ON in response to the contact, when a supervisor operates an operation switch and a first a-contact switch 41 is closed for a short period of time to apply a remote start signal to a controller 30, the controller 30 is operated to start operating an absorption refrigerator. Then, when the supervisor operates a stop switch, the contact 45 is opened for a short period of time to output a L signal instead of a H signal for a short period of time. In this case, since a microcomputer calculator 35 is operated and the switch 40 is closed, it is judged that signal change due to the OFF of the contact 45 for a short period of time is valid, signals are output from the controller 30 to an absorption liquid pump 15, a refrigerant pump 19, a heat quantity control valve 21, etc., a diluting operation is executed, and the refrigerator is then stopped. Thus, the difference of the start/stop signal can be easily coped with by the remote controller.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a remote start/stop device used for remote start/stop control of an absorption refrigerator or the like.

(Example) Conventional technology For example, in the control panel of an absorption refrigerator as shown in Japanese Patent Application Laid-Open No. 63-187075, a remote controller is installed in a location other than the installation location of the absorption refrigerator, and remote control from this remote controller is provided. The control panel on the absorption chiller side was operated based on the stop signal, and the absorption chiller was controlled to start and stop.

(c) Problems to be Solved by the Invention In the above conventional technology, the polarity of the start/stop signal input by the control device changes depending on the difference in the contacts provided on the remote control, for example, the difference between a normally open contact and a normally closed contact. , each of the on/off signals was handled individually by changing the circuit within the control device. Further, when the polarity of the start/stop signal changes due to a change in the specifications of the remote control, it is necessary to change the circuit within the control device accordingly, causing the problem that the change work becomes complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a remote start/stop device that can easily respond to differences in start/stop signals from a remote controller.

(2) Means for Solving the Problems In order to solve the above problems, the present invention provides a case where the remote stop signal of the absorption refrigerator is from a normally open contact (44) or a normally closed contact (45). In addition, a remote start/stop device is provided which responds to each stop signal using the same circuit.

Also, turn on and enable the remote start/stop signal for the absorption chiller, or
The present invention provides a remote start/stop device that realizes whether to turn off or enable using the same circuit through microcomputer processing or the like.

Furthermore, a remote control device (R), and this remote control device (R)
In a remote start/stop device having a control device (30) that inputs a start/stop signal from A changeover switch (40) which is switched depending on whether the open contact (44) is activated or not, and a remote control device (R) are connected to one input terminal, and the changeover switch (40) is connected to the other input terminal. Exclusive OR circuit (46
》The present invention provides a remote start/stop device equipped with the following. (E) If the remote stop signal of the effect absorption refrigerator changes from normally open contact (44) to normally closed contact (45), or from normally closed contact (45) to normally open contact contact(
44>, it can be handled with the same circuit, and it also has a control device that has a circuit that corresponds to the normally closed contact (45) and a circuit that corresponds to the normally open contact (44). There is no need to prepare a separate control device, making it possible to standardize the control device. In addition, if the specifications of the remote start/stop device of an absorption chiller are changed and whether the remote start/stop signal is enabled when turned on or enabled when turned off is changed, it can be easily controlled by the same circuit through microcomputer processing, etc. In addition, there is no need to prepare separate circuits for enabling when on or enabling when off.
Standardization of control devices becomes possible.

Furthermore, if the specifications of the remote control device (R) are changed, the changeover switch (40
》, the exclusive OR circuit (46》
The input of the other input terminal of the remote control device (R
) is switched, the signal output by the exclusive OR circuit (46) in response to the remote stop signal will be the same, making it easy to change the specifications of the remote control device (R). In addition, it becomes possible to standardize the control device (30).

(f) Example Hereinafter, an example of the present invention will be explained in detail based on the drawings. The one shown in Figure 2 is a double-effect absorption refrigerator, in which the refrigerant is water (H.O.) and the absorbent (absorbent liquid) is lithium bromide (L.
iBr) using an aqueous solution.

In Figure 2, (1> is a high-temperature regenerator equipped with a gas burner (IB>), (2) is a low-temperature regenerator, (3) is a condenser, (
4) is an evaporator, (5) is an absorber, (6) is a low temperature heat exchanger, (7) is a high temperature heat exchanger, (8) to (12) are absorption liquid piping, and (15) is an absorption liquid bomb. , (16) or 1
8) is a refrigerant pipe, (19) is a refrigerant pump, (20) is a gas pipe connected to a gas burner (IB), (21) is a heating amount control valve, and (22) is a cold water pipe, each of which is connected to the first The piping is connected as shown in the figure.Also, (25)
is a cooling water pipe, and an absorber heat exchanger (26) and a condenser heat exchanger (27) are installed in the middle of this cooling water pipe (25).
> is provided.

In FIGS. 1 and 2, (30) is a control device for the absorption refrigerator, and (31) to (34) are first to fourth human power terminals, respectively. (35) is a microcomputer arithmetic unit to which the first human power terminal (31) and the third human power terminal (33) are connected, and (36) is the I/O boat, (
37> is the central processing unit (hereinafter referred to as CPU), (38)
is a ROM. Also, (40> is a microcomputer arithmetic unit (3
5) The connection is not completed, and the contact points of the remote control device are different, which will be explained later.
In other words, it is a changeover switch that can be changed, for example, during the manufacture of absorption refrigerators, depending on the polarity of the start/stop signal. In addition, (R) is a remote control device (hereinafter referred to as the remote control) for the absorption refrigerator, and this remote control (R) has a first normally open contact (hereinafter referred to as the 1a contact) that operates when the absorption refrigerator starts operating. 41) is provided. This 1st a contact (
41) are connected to the third and fourth human power terminals (33) and (34) via signal lines (42) and (43),
It turns on for a short time when the administrator turns on the operation switch (not shown). Further, (44) is a second normally open contact (hereinafter referred to as the 28th contact) that operates when the absorption refrigerator stops operating, and this 23rd contact (44) is connected to the signal line (s1).
, (s2) to the first and second human power terminals (31).
(32) is connected. And remote control (R)
When the second a contact (44) is provided in the control device (30), the changeover switch (40) of the control device (30) is turned off. Then, by turning off the changeover switch (40), the control device (30) switches the second a contact (44) when the absorption refrigerator is stopped.
It operates based on pulse signals from. In the above-mentioned absorption refrigerator, for example, when the administrator operates the operation switch of the remote control (R) and the 1a contact (41) is turned on for a short time, the remote control (R) sends a remote start signal ( pulse signal) is output and the microcomputer arithmetic unit (35)
works. And the microcomputer arithmetic unit e<35) (7)
The program stored in the CPU (37) is executed. Then, signals are output from the control device (30) to the absorption liquid bomb (15), refrigerant bomb (19), heating amount control valve (2l), etc., and the absorption liquid bomb (15) and refrigerant bomb (19) are operated. At the same time, the heating amount control valve (21) opens and the high-temperature regenerator (1) starts operating.When the absorption chiller is operating, the absorption liquid and refrigerant circulate as in the conventional case, and the absorption liquid The dilution and concentration of the refrigerant are repeated, and the evaporation and condensation of the refrigerant are repeated, and cold water is supplied from the evaporator (4) to the load.

After that, the administrator operates a stop switch (not shown),
When the second a contact (44) is short-lived, a remote stop signal (pulse signal) can be output from the remote control (R) to the control device (30). ) operates, and the selector switch (40
) is off, it is determined that the pulse signal is valid. Then, the control device is controlled based on the operation of the microcomputer arithmetic unit (35)! (30) outputs a signal to the absorption liquid bomb (15), refrigerant bomb (19), heating amount control valve (21), etc., and after dilution operation is performed, the absorption refrigerator stops. (R) instead of the 21st contact (44),
When the normally closed contact (hereinafter referred to as the B contact) (45) is provided as shown by the broken line in FIG. 1, the changeover switch (40) of the control device (30) is turned on. When the changeover switch (40) is turned on, the contact (45) of the control device (30) is turned off and a low level signal is sent from the remote control (R) for a short time instead of a high level signal (hereinafter referred to as H signal). (hereinafter referred to as L signal) is output.

As mentioned above, when the remote control (R) is provided with the b contact (45) and the changeover switch (40) is turned on correspondingly, the administrator operates the operation switch and the first
When the a contact (41) is activated for a short time and a remote start signal (pulse signal) is given to the control device (30), the control device (30) operates in the same manner as above and the absorption refrigerator starts operating. . Thereafter, when the administrator operates the stop switch, the b contact (45) is turned off for a short time, and the remote control (41) outputs an L signal instead of the H signal for a short time. At this time, the microcomputer arithmetic unit (35) is operating and the changeover switch (40) is on as described above, so it is determined that the signal change due to the short period of turning off the b contact (45) is effective. From the control device (30) to the absorption liquid pump (15) and the refrigerant pump (l
9), and a signal is output to the heating amount control valve (21), etc.
After the dilution operation is performed, the absorption refrigerator is stopped.

Additionally, if the specifications of the remote control (R) are changed during the manufacture of the absorption chiller and the contact on the operation stop side is changed from the 2nd a contact (44) to the b contact (45), the control will be adjusted accordingly. The changeover switch (40) of the device (30) is switched from off to on. Also, the contact on the operation stop side is the b contact (45
> to the second a contact (44), the changeover switch (40) is correspondingly switched from the normal state to the OFF state.

According to the above embodiment, the specification of the remote control (R) connected to the control device (30) is changed during the manufacture of the absorption refrigerator, and the contact on the operation stop side changes from the second a contact (44) to the b contact. (45), or from the B contact (45) to the 2nd A contact (44), without changing the circuit of the control device (30).
This can be easily handled by switching 0). Further, the control device (30) can be used in common for the remote control having the 23rd contact (44) and the remote control having the B contact (45), and the control device (30) can be standardized.

FIG. 3 shows another embodiment of the present invention.
In the figures, parts similar to those in Figure 1 are given the same figure numbers.
A detailed explanation will be omitted. (46) is an exclusive OR circuit (hereinafter referred to as X-OR), and this
One input terminal of 6) is connected to the first human power terminal (31), and the other input terminal is connected to the changeover switch (40). When the remote control (R) connected to the control device (30) is provided with the 23rd contact (44) for stopping operation, the changeover switch (40) is turned off and the remote control (R) is connected to the control device (30). R) is provided with a b contact (45) for stopping the operation instead of the second a contact (44), the changeover switch (40) is turned on.
The operation when the remote control (R) is provided with the first a contact (41) and the second a contact (44) will be described below. When the administrator operates the operation switch to operate the absorption chiller, the 13th contact (41
) is activated for a short time, and a pulse signal is given from the remote control (R) to the microcomputer arithmetic unit (35). Also, at this time,
Since the 23rd contact (44) on the operation stop side is off and the changeover switch (4o) is also off, X-OR (
L signal is given to both input terminals of 46), and X-OR(4
6) outputs an L signal. Therefore, the microcomputer arithmetic unit (35) operates based on the pulse signal sent from the remote controller (R), and the operation of the absorption refrigerator is started.

After that, when time passes and the administrator operates the stop switch to stop the absorption chiller, the -4a contact (44) on the operation stop side turns on for a short time, and the X-OR (46
) is outputted to one input terminal of the H signal. And X
Since the L signal is applied to the other input terminal of -OR (46), X-OR (46) outputs an H signal for a short time. The microcomputer calculation unit (35) operates based on this H signal (pulse signal), and the absorption refrigerator stops after dilution operation is performed. After that, the administrator operates the operation switch,
When the first a contact point (41) is activated for a short time and a pulse signal is given to the microcomputer arithmetic unit (35>), the operation of the absorption refrigerator is similarly started.

Next, connect the remote control (R) to the b contact (45) and the 1a contact (
41) is provided, the operation will be explained. Except when the administrator operates the stop switch, the b contact (45) is active and the X-OR (46) (
7) An H signal is given to one input terminal. In addition, if the remote control (R) is provided with a b contact (45),
The changeover switch (40》) is turned on, and X1OR (
An H signal is given to the other input terminal of 46), and the
(46) outputs the L signal to the microcomputer arithmetic unit (35). When the administrator operates the operation switch in order to operate the absorption refrigerating machine while it is stopped, the 1a contact (41) on the operation start side is activated for a short time. Then, a pulse signal is output from the remote control (R) to the microcomputer calculation device (35), and the microcomputer calculation device (35) operates based on the pulse signal, and the operation of the absorption refrigerator starts.

After that, when time has passed and the administrator operates the stop switch to stop the absorption chiller, the b contact (45) on the operation stop side turns off for a short time, and the
An L signal is applied to one input terminal of -OR (46). Since the H signal is given to the other input terminal of the X-OR (46), the X-OR (46) is connected to the remote control (
It judges the low signal given from R) to be valid and outputs an H signal for a short time. The microcomputer calculation unit (35) operates based on this H signal (pulse signal), and after dilution operation is performed, the absorption refrigerator is stopped. After that, when the administrator operates the operation switch and the No. 1a contact (41) is turned on for a short time, the microcomputer calculation unit (35) operates by inputting a pulse signal in the same way as above, and the absorption chiller The operation begins. After that, the administrator operates the stop switch and connects the b contact (45).
When the is turned off for a short time, the microcomputer arithmetic unit (35) operates by inputting a pulse signal from the X-OR (46) in the same manner as described above, and the absorption refrigerator stops.

Also, during the manufacture of absorption refrigerators, the specifications of the remote control (R) were changed, and the contact on the operation stop side was changed from the 23rd contact (44> to b).
When the contact point (45) is changed, the changeover switch (40) of the control device (30) is changed from off to on in response to the change. Therefore, when the absorption chiller stops operating, the b contact (45) turns off and the L signal is output from the nomocon (R), the pulse signal becomes
(46) to the microcomputer arithmetic unit (35), and the absorption refrigerator is stopped. In addition, if the specifications of the remote control (R) are changed and the contact on the stop side is changed from the b contact (45) to the 28th contact (44), the control device (30) will be switched accordingly. The switch (40) is turned from on to off. Therefore, when the absorption refrigerator stops operating, the second a contact (44) is turned on, and the H signal is sent to the remote controller (R).
When the pulse signal is output from the X-OR (46), the pulse signal is output from the X-OR (46) to the microcomputer calculation unit (35), and the absorption refrigerator is stopped.

According to the above embodiment, the specifications of the remote control (R) are changed during the manufacture of the absorption refrigerator, and the contact point on the operation stop side is set to the second a.
When changing from contact (44) to B contact (45),
Or, if the B contact (45) is changed to the second A contact (44), it can be connected to the other input terminal of the X-OR (46) without changing the circuit of the control device (30). This can be easily handled by changing the changeover switch (40). Furthermore, the control device (30) can be used in common with the remote control having the second a contact (44) and the remote control having the b contact (45).
0) can be standardized.

It should be noted that the present invention is not limited to the above embodiments, and for example, when the changeover switch (40) is off and the second a contact (44) is turned on, the absorption refrigerator starts or stops;
When the changeover switch (40) is closed, the B contact (45)
Even if the absorption refrigerator is started or stopped when the absorption refrigerator is turned off, the same effects as in the above embodiment can be obtained.

(G) Effects of the invention The present invention is a remote start/stop device configured as described above,
When the remote start/stop signal for an absorption chiller comes from a normally open contact or a normally closed contact, the specifications were changed and the remote start/stop signal changed by responding to each start/stop signal using the same circuit. In addition, it is possible to easily handle various cases using the same circuit, and standardization of the control device can be achieved.

Additionally, by using the same circuit through microcomputer processing to determine whether the absorption chiller's remote start/stop signal is enabled when it is on or off, the specifications have been changed and the remote start/stop signal can be turned on. If the setting is changed to enable or off, it can be easily handled with the same circuit, and the control device can be standardized. Furthermore, the control device is provided with an exclusive OR circuit, one input terminal of this exclusive OR circuit is connected to the contact of the remote control device, and the other input terminal is connected to the signal from the remote control device. By connecting a changeover switch that can be switched depending on whether the signal is generated by a contact or a normally closed contact, the specifications of the remote control device can be changed, and the on/off signal can be changed depending on whether the signal is generated by a normally open contact or a normally closed contact. Even if there is a change between the two, it can be easily handled by changing the changeover switch, and the control device can be standardized.

[Brief explanation of drawings]

Fig. 1 is a schematic circuit diagram of a remote start/stop device showing one embodiment of the present invention, Fig. 2 is a circuit configuration diagram of an absorption refrigerator, and Fig. 3 is a remote start/stop device showing another embodiment of the present invention. FIG. (30)...control device, (R)...remote control device (remote control), (40)...changeover switch, (41
)...1st normally open contact (1a contact), (44)...
・Second normally open contact (23rd contact), (45)... Normally closed contact (b contact), (46)... Exclusive OR circuit.

Claims (1)

[Claims] 1. The remote start/stop signal of the absorption refrigerator is based on a normally open contact;
Or, in the case of a normally closed contact, a remote start/stop device is characterized in that each start/stop signal is responded to by the same circuit. 2. Turn on and enable the absorption chiller remote start/stop signal, or
A remote start/stop device characterized in that whether it is turned off or enabled is realized by the same circuit through microcomputer processing or the like. 3. In a remote start/stop device that has a remote control device and a control device that inputs start/stop signals from the remote control device, the control device has a control device in which the signal from the remote control device is a normally closed contact or a normally open contact. and an exclusive OR circuit in which the changeover switch is connected to one input terminal and the remote control device is connected to the other input terminal. Remote start/stop device.