JPS6233493B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar heating device that performs heating using solar thermal energy.

A conventional heating device of this type was constructed as shown in FIG. In other words, a heat storage tank 1 that stores solar heat, and an auxiliary heat source device 2 that supplements the amount of heat when solar heat is insufficient.
and a temperature sensor 5 which selects either the heat storage tank 1 or the auxiliary heat source device 2 with the circuit switching valve 3 and supplies the heat medium to the radiator 4 in circulation, and detects the temperature of the heat medium supplied to the heat storage tank 1. The temperature detection circuit 6, which detects a specific set temperature using a signal, is configured to control only the circuit switching valve 3, or the circuit switching valve 3 and the auxiliary heat source device 2, based on its output signal.

However, in this configuration, if only the circuit switching valve 3 is controlled by the temperature detection signal, the auxiliary heat source device 2 does not start and stop automatically, so the auxiliary heat source device 2 is always kept in operation during heating operation. and,
Energy is wasted for keeping warm. Furthermore, if the circuit switching valve 3 and the auxiliary heat source device 2 are controlled simultaneously using the temperature detection signal, the auxiliary heat source device 2 is energized for the first time when switching from solar heating to heating by the auxiliary heat source device 2, so the auxiliary heat source device There has been an inconvenience in that a low temperature heat medium is temporarily supplied until the heat medium inside the device is heated.

Furthermore, at the start of heating, since the room temperature of the heating room heated by the radiator 4 is low, a heat medium with a temperature high enough is supplied to obtain a comfortable outlet temperature of the radiator 4 and to quickly raise the room temperature. There is a need to. However, the set temperature of the temperature detection circuit 6 needs to be set to the lowest heating medium temperature necessary for maintaining the room temperature of the heating room at a steady heating temperature in order to increase the energy contribution rate of solar heating. Therefore, if the temperature of the heat medium in the heat storage tank 1 is slightly higher than the set temperature of the temperature detection circuit when heating starts, solar heating will start and not only will satisfactory heating not be performed, but the auxiliary heat source unit 2 will not be able to be used effectively. There was this inconvenience.

In view of the above-mentioned conventional drawbacks, the present invention automates the starting and stopping of the auxiliary heat source equipment without interrupting heating when switching heat sources, eliminates wasteful energy loss, improves operability, and improves the room temperature when heating starts. The purpose is to increase the energy contribution rate while accelerating the rise.

In order to achieve the above object, the present invention includes a circuit switching valve for selecting a heat storage tank or an auxiliary heat source device, a temperature sensor for detecting the temperature of a heat medium supplied from the heat storage tank, and a temperature sensor input terminal. a main controller having a circuit switching valve control output terminal, an auxiliary heat source control output terminal, and a heating operation switch;
The temperature sensor has a timer element that is activated when the second and third set temperatures and the temperature sensor input are lower than the third set temperature when the heating operation switch is turned on and remains on for a certain period of time thereafter. When the input is lower than the first setting temperature or the timer is on, a signal is output to the circuit switching valve control output terminal to switch the circuit switching valve to the auxiliary heat source equipment side, and the temperature sensor input is set to the second setting. When the temperature is lower than the temperature or when the timer is on, the determination means outputs a signal to turn on the auxiliary heat source device to the auxiliary heat source control output terminal.

With the above configuration, if the heat medium temperature of the heat storage tank is higher than the first set temperature but lower than the third set temperature at the start of heating, the timer starts,
The circuit switching valve is switched to the auxiliary heat source side by the timer signal, and the operation of the auxiliary heat source machine is also started at the same time. As a result, heating by the auxiliary heat source device is started and the heating room can be rapidly heated. After a certain period of time has elapsed, when the timer output stops, the circuit switching valve is switched to the heat storage tank side at a temperature higher than the first set temperature, and the auxiliary heat source device is operated at a temperature lower than the second set temperature. Here, since the second set temperature is set higher than the first set temperature, the operation of the auxiliary heat source machine is started before the circuit switching valve switches from the heat storage tank side to the auxiliary heat source side, and the internal heat medium is Since the is preheated, there is no interruption in heating when switching, and the auxiliary heat source equipment is stopped when the temperature of the heat medium exceeds the second set temperature.
This allows wasteful energy consumption to be kept to a minimum.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. Note that parts that are the same as those in FIG. 1 will be described using the same numbers.

In FIG. 2, the temperature sensor 5 is connected to the temperature sensor input terminal 8 of the main controller 7, the circuit switching valve 3 is connected to the circuit switching valve control output terminal 9, and the auxiliary heat source device 2 is connected to the auxiliary heat source device control output terminal 10. are connected to each other.

Moreover, the inside of the main control device 7 shows its logic, and specifically, it may be composed of a microcomputer or the like. The signal input from the temperature sensor input terminal 8 is sent to the comparator 11, the comparator 12, and the comparator 1.
3 and compared with the setting signal 14, setting signal 15, and setting signal 16, respectively. The setting signal 16 is from the setting signal 15 or from the setting signal 15.
are signals corresponding to temperatures higher than the setting signal 14, respectively, and constitute the third, second, and first set temperatures, respectively. Further, the outputs of the comparators 11, 12, and 13 become true (“1”) when the temperature is lower than the first, second, and third set temperatures, respectively. timer element 1
7 is a comparator 13 when the heating operation switch 18 is turned on.
If the output of the timer element 17 is true, the timer element 17 is activated, and the input of the timer element 17 becomes true, and the timer element 17 is stopped after a certain period of time has elapsed or by a signal from the timer release switch 19. A logical sum signal of the output of the timer element 17 and the output of the comparator 11 is output to the circuit switching valve control output terminal 9, and when the signal of the output terminal 9 is true,
The circuit switching valve 3 is on the auxiliary heat source device 2 side. In addition, the auxiliary heat source device control output terminal 10 is connected to the output of the timer element 17, the output of the comparator 12, and the heating operation switch 18.
A logical OR signal with the signal is output, and the output terminal 10
When the signal is true, the auxiliary heat source device 2 is turned on.
In addition, the setting signal 1 is set by the setting temperature changeover switch 20.
4, 15, and 16 can be switched simultaneously.

In Figure 3, the horizontal axis represents time;
At time 21, when the signal 22 of the heating operation switch 18 is turned on, the timer output 25 becomes true because the heat medium temperature 23 is lower than the third set temperature 24. Then, the signal 26 at the output terminal 9 becomes true and the signal 27 at the output terminal 10 becomes true, connection by the auxiliary heat source device 2 is started, and the heating room is rapidly heated. After a certain period of time, timer output 2 at time 28
5 stops. At this time, since the heat medium temperature 23 is higher than the second set temperature 29 and the first set temperature 30, both the output signals 26 and 27 become false, and the circuit switching valve 3 is switched to the heat storage tank 1 side. The operation of the auxiliary heat source device 2 is then stopped, and heating is performed using solar heat. After that, at time 31, the heat medium temperature is 2.
3 becomes lower than the second set temperature 29, the signal 27 at the output terminal 10 becomes true, and the auxiliary heat source device 2 is turned on while performing solar heating and preheating is performed. After a while, at time 32, when the heat medium temperature 23 becomes lower than the first set temperature 27, the signal 26 at the output terminal 9 becomes true, and the heating by the auxiliary heat source device 2 is started. At this time, since the auxiliary heat source device 2 has already been preheated, heating will not be temporarily interrupted.
In addition, in this Fig. 3, at time 21, the heating medium temperature is 2.
3 is sufficiently high and higher than the third set temperature 24, the timer element 17 is not activated, so heating with solar heat is started, and if the heating medium temperature decreases thereafter, after time 25 in FIG. Performs the same operation as .

Further, even immediately after heating starts, if the temperature in the heating chamber is already high, the timer release switch 19 can be operated to shift to the operation after time 28 without passing a certain period of time.

In addition, the set temperature changeover switch 20 allows the first,
The second and third set temperatures are shown in Figure 3 30', 29', 2.
4', the optimum set temperature can be selected depending on the type of radiator 4, for example, a fan coil or a floor heater.

As described above, the solar heating device of the present invention has the following various excellent features.

(1) Since the operation of the auxiliary heat source equipment is automated,
The temperature of the heating heat medium does not drop temporarily when switching the heating mode, and no wasteful preheating energy is consumed.

(2) When heating starts and the heat medium temperature in the heat storage tank is not sufficient, heating is performed by the auxiliary heat source unit for a certain period of time, so the heating room can be heated quickly.
In addition, during normal conditions, the heating medium generated by solar heat can be used to the maximum extent, so the contribution rate of solar thermal energy can be maintained at a high level.

(3) When heating starts and the temperature of the heating room is high to a certain extent, highly efficient heating can be achieved by using a timer release switch to immediately return to normal operation.

(4) If you can select the optimal temperature setting according to the type of radiator using the temperature setting switch,
This allows maximum use of solar thermal energy.

[Brief explanation of the drawing]

Fig. 1 is a system configuration diagram showing a conventional solar heating device, Fig. 2 is a system configuration diagram showing a solar heating device according to an embodiment of the present invention, and Fig. 3 is an operation explanatory diagram showing the operation of the solar heating device. It is. 1... Heat storage tank, 2... Auxiliary heat source device, 3... Circuit switching valve, 4... Heat radiator, 5... Temperature sensor, 7
...Main controller, 8...Temperature sensor input terminal,
9...Circuit switching valve control output terminal, 10...Auxiliary heat source device control output terminal, 17...Timer element, 18
... Heating operation switch, 19 ... Timer release switch, 20 ... Set temperature changeover switch.

Claims (1)

[Claims] 1. A heat storage tank that stores a heating medium heated by solar heat;
an auxiliary heat source machine that heats a heat medium with auxiliary energy;
In a solar heating device having a circuit switching valve that switches a heat medium supply line to the heat radiator to the heat storage tank or the auxiliary heat source device, a temperature sensor that detects the temperature of the heat medium supplied from the heat storage tank to the radiator, and a main control device. The main controller has a temperature sensor input terminal, a circuit switching valve control output terminal, an auxiliary heat source device control output terminal, and a heating operation switch, and the temperature sensor has a temperature sensor input terminal, a circuit switching valve control output terminal, and a heating operation switch. The valve is connected to a circuit switching valve control output terminal, the auxiliary heat source machine is connected to an auxiliary heat source machine control output terminal, and the main controller is connected to a first
The set temperature, the second set temperature higher than that, the third set temperature even higher, and when the temperature sensor input is lower than the third set temperature when the heating operation switch is turned on, it is activated, and after that for a certain period of time. a timer element that maintains an on state, and an output that switches the circuit switching valve to the auxiliary heat source device side when the input of the temperature sensor is lower than a first set temperature or the timer element is on; An auxiliary heat source device control output outputs an output to the switching valve control output terminal and turns on the auxiliary heat source device when the input of the temperature sensor is lower than the second set temperature or the timer element is on. A solar heating device comprising: determination means for outputting to a terminal. 2. The solar heating device according to claim 1, wherein the timer element of the main control device has a timer release switch so that the timer can be canceled midway through. 3. The solar heating device according to claim 1, wherein the temperature setting element of the main controller has a set temperature changeover switch, and is configured to simultaneously switch between the first, second, and third set temperatures.