JPS5966659A - Liquid heating apparatus of forced circulation type utilizing solar heat - Google Patents

Abstract

PURPOSE:To perform efficient and more economical heat collecting operation, by detecting the exposed dose rate of solar radiation to a solar heat collector, and by automatically controlling a driving pump so that the larger the detected exposed dose rate of solar radiation is, the larger the rate of liquid forcedly circulated is, based on the data detected by an exposed dose rate of solar radiation detecting device. CONSTITUTION:A photo transistor 10, one of the detecting devices to detect the dose rate of solar radiation to a solar heat collector 1, is provided to a solar heat collector system so as to face it to the same direction as the heat collecting surface of a solar heat collector 1. Besides, a device 11 which automatically and reversely controls the rotating speed of a driving DC motor M is provided to the solar heat collector 1. The motor is the driving source of a pump 4, and the larger the detected dose rate of solar radiation is, the larger the rate of water forcedly circulated is, based on the data detected by the phototransistor 10. In this case, the above-mentioned forcibly circulated pump 4 is constituted in-linkaged manner so that it is automatically driven when the temperature difference between the temperature, detected by a temperature sensor 12 on the high temperature side provided to the solar heat collector 1, and that detected by a temperature sensor 13 on the low temperature side provided in a hot water reservoir tank 2 becomes higher than the predetermined temperature.

Description

[Detailed Description of the Invention] The present invention is directed to direct heating type solar water heaters that span between a solar collector and a storage tank, such as an indirect heating type forced circulation solar water heater that uses a heat return medium. The present invention relates to a forced circulation Jd type solar heating liquid heating device in which a pump for forced circulation is interposed in the outgoing pipe line from the hot water storage tank to the solar heat collector, in a circuit that circulates the liquid to be heated.

In a 1-ton liquid heating device for solar thermal energy in the Congo Song Dynasty, the forced circulation pumping by the irI pump was always constant regardless of the solar radiation, so for example, when the amount of solar radiation was high, If it is set according to the heat collection operation, the amount of strong circulation during heat collection operation when the amount of solar radiation is low will be weekly, and the pump drive qJ force will be wasted accordingly. Conversely, if the amount of circulating fluid is set according to the heat collection operation when the solar radiation is low, the amount of circulating water during the heat operation is too small.
：1゜The collection, efficiency, and rate are things to look at and judge, and the general v.
c is 1. .

The current situation is to set the amount of water in the middle of these extremes so that Keizairen 1 of Sekijohen can be performed while 1□thermal efficiency□ is moderately high. An object of the present invention is to enable efficient collective operation with high heat collection efficiency and more economical operation.

The characteristic configuration of the forced circulation type liquid heating device for solar thermal energy according to the present invention, which has been made to achieve the above object, includes a device for detecting the amount of solar radiation on the solar heat collector, and a device for detecting the amount of solar radiation. Based on the detection result, the pump is automatically and reversibly driven and controlled so that the detected amount of solar radiation increases and the amount of controlled circulating fluid increases. , when the amount of solar radiation to the solar collector is low,
By reducing the amount of forced circulation fluid by reducing the pump rotation speed, etc., the drive power of the pump is reduced, and as the amount of solar radiation increases, the amount of forced circulation fluid is gradually increased to improve the heat collection efficiency of the solar collector. =tg<t, because a can be done・
In contrast to the conventional 0 constant flow type system, it has now become possible to perform a heat collection operation with high heat collection efficiency and a more sputum-efficient heat collection operation.

・Ministry-F, -$,'i@F'A. A □ Ya Akira, □ Makoto.

do.

A forced circulation solar water heater, which is an example of a forced circulation solar liquid heating device, is constructed as shown in Figure 1. Water for hot water supply (an example of heated liquid ) to circulate mg
s' (3r = '++q, and this - term one road (31
', a forced circulation pump (4) is interposed in the middle of the outgoing pipe section (8a) from the hot water storage tank +21 to the solar collector (1), and a ball tap is installed in the hot water storage tank (2). A make-up water pipe (
8) and a hot water supply pipe (9) for taking out dry water, and by forcing hot water supply water to circulate and flow using the pump (4), c9. - The hot water heated and heated by the solar heat collecting action of the rector (1) is sequentially stored in the hot water storage tank (21
The structure is designed to collect and store water.

:As shown in FIG. 2, the phototransistor (101), which is an example of a device for detecting the amount of solar radiation on the solar collector (1), is the same as the heat collecting surface of the solar collector (1). Based on the detection result of the phototransistor (101), the pump' (which is the driving source of 4J DC motor (goods)
A device (ID) is provided to dynamically and reversibly control the number of rotations of the
The circuit mainly consists of a noise prevention circuit (IIA), a main/phase control circuit (lIB), and an impedance variable circuit (lIB).
.
:,.

□ Noise prevention circuit (IIA) ・ Yes □,
Reactance (L+ and condensation length -” (C7) ifl
, Triac (Ql) attenuates the harmonic components of the phase control waveform.

Main phase control circuit 1II8 (llB)' Resistor (R1) and terminals T, -T, rKJ in series impedance At the same time, the diac (Ql
)75') By changing the timing that generates the riff'/-H'/L/□, the conduction angle of the triac (Ql) is changed, and by reducing the impedance between In C1), the triac (Q,) generates a date pulse at an early time vcONI, and the conduction angle of the triac (Ql) becomes thicker. Beadance variable circuit (tle) terminals T, -T, ! '[: Since the current flowing through is alternating current, it is first converted to direct current at ).

The main factor that determines the impedance between T, -, T, and 1ltl is the impedance between c and E of a transistor (Tr), which is determined by the pace current of the transistor (Tr).

Tsumari, transistor (Tr) base 'R! N k
The mass arranged by X is C-E of phototransistor (10)
1141, and as the solar radiation increases, the impedance between C and E of the phototransistor (10) decreases → the base current of the transistor (Tr) increases → the impedance between C and E of the transistor (Tr) increases. The bottom of the impedance → The bottom of the impedance between T and -T → Bright charging of the capacitor (C1) → The diac (Q,) turns on early → The conduction angle of the triac (Q,) increases → Transformer 1
1ii Increase in voltage of 4 children → Increase in voltage to DC motor → Rotation speed of pump (4) increases.

Voltage stabilization circuit (IID) Impedance variable circuit (II
By stabilizing the voltage of the phototransistor (lO) in C), voltage fluctuations in the power supply voltage (AC100V) can be controlled by the phototransistor (lO).
Tr) so that it is not enlarged.

In addition, the temperature difference that can be detected between the high temperature sensor (121) installed at the top of the solar heat collector (1) and the low temperature sensor (3) installed at the bottom of the field tank (2) is set. The relay (R1 contact (Ra
)・%oN is set 11 and the DC motor αυ is set 114 to be started completely automatically.

In addition, even though there is residual heat inside the solar heat collector mountain, in other words, even though the temperature difference setting is at or above 1 shift, the pump (4) is immediately stopped even if the sun goes down to 1. Determine the minimum output using a variable resistor (vR) to avoid problems.

In the example, solar radiation (6τ emission device (10)
Although a phototransistor is used as a phototransistor, a photoconductive device (CDS) may be used instead.

Further, a current motor (induction motor) may be used instead of the DC motor. In this case, an AC motor is connected to the AO terminal shown in FIG. 2 instead of the transformer.

The present invention may be applied to a two-liquid system using a heat transport medium other than water, that is, a forced circulation type solar hot water system using +ifl contact heating.

Another means of changing the circulating water speed without controlling the rotational speed of the motor (B) is to use motor C3 and bonder (4).
) and a continuously variable transmission (for example, a belt-type continuously variable transmission
i! ), and at the same time, purchased this modified device with a servo motor so that it could be operated at grass speed, and this servo motor was
Driven by li control device tll); made into 41 for dark control.

In addition, in the name control means, how can we use solar radiation tij as an example? It
Although the case in which 'i clothes'I(jl'j) is continuously changed is shown, 'f' and 'j' may be changed in stages, and a simple 4tG configuration in which only two steps are changed is also possible.

[Brief explanation of the drawing]

hs 1 Figure Vj The overall structure of the forced ring type solar thermal liquid heating device of the main power generation F force is shown in Figure 11, and Figure 2 is a control circuit diagram. (1)...Tenma) heat collector, (2)...
...Hot water tank, (3)...j, ji J'j
, j pipe line, (3a)... Outgoing pipe route capital, (4)...
...Class 161j circulation pump, aα...B
Traction detection device, till...if, IJ grinding device fffi, (1 car...high temperature side temperature sensor,
(j row...low temperature side temperature j￥senzu. 27

Claims (1)

[Scope of Claims] ■ [Among the circuits (3) for discharging the heated liquid between the hot water collector (1) and the hot water storage tank (2), a circuit (3) that connects the solar heat collector from the hot water storage tank (2) (1) Forced circulation solar heating system in which a forced circulation pump (4) is interposed in the outgoing pipe section (3a) to (1)
Based on the detection results of the device (10) that detects the amount of solar radiation on the solar heat collector (1) and the solar radiation detection device 0, the amount of forced j shield annulus increases as the detected solar radiation increases. A forced circulation type solar thermal liquid heating device characterized in that it is equipped with a device fH (11) for automatically and reversibly driving and controlling the pump (4) so that the pump (4) increases in temperature. Only when the temperature difference detected between the high-temperature sensor (121) provided on the solar collector (1) and the low-temperature sensor [31] provided on the hot water storage tank +21 exceeds the setting, the pump (4) The forced circulation type solar heating liquid heating device according to claim 1, which is configured to be linked so as to be automatically activated.