JPH0827001B2 - Radiator operation control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an operation control method for a radiator such as a hot air heating device.

(B) Conventional technology For example, in Japanese Utility Model Publication No. 58-83006, the operation control of the radiator is such that the temperature of the hot water sent from the heat source to the radiator is raised for a certain period from the start of heating, and is lowered thereafter. A method is disclosed.

(C) Problem to be Solved by the Invention In the above-described conventional technique, the hot water temperature is controlled to be high for a certain time even when the room temperature is slightly lower than the set temperature, and the problem that the room is heated more than necessary occurs. If the room temperature is significantly lower than the set temperature, the hot water temperature is controlled to be low before the room temperature reaches the set temperature, and it may take a long time before the room temperature reaches the set temperature. Furthermore, when the blower for blowing hot air provided on the radiator is operated for a certain period from the start of heating, when the outside air temperature is significantly lower than the set temperature, the blower does not warm up the entire room. May stop and it may take a long time to warm up the entire room.

An object of the present invention is to appropriately control the supply of hot water to the radiator and the operation of the blower to prevent excessive heat radiation, and to warm the entire room in a short time.

(D) Means for Solving the Problems In the present invention, a heat exchanger that is supplied with hot water from a heat source and performs natural convection and radiant heating, a valve that controls the supply of hot water to the heat exchanger, and a heat exchanger. In an operation control method of a radiator provided with a blower for circulating indoor air and a temperature detector for detecting room temperature, according to a set temperature preset with respect to room temperature, a predetermined temperature lower than the set temperature is set. The first set temperature and the second set temperature which is higher than the set temperature by a predetermined temperature are determined, and the valve opening temperature and the valve closing temperature higher than the valve opening temperature are set between the first set temperature and the second set temperature. The temperature and the blower operation start temperature lower than the valve open temperature, and the blower stop temperature higher than the blower operation start temperature and lower than the valve open temperature are set, and the room temperature is lower than the first set temperature. If is also low, the room temperature becomes the second set temperature The valve is opened and the blower is operated to start up.In normal operation after completion of this rising operation, the valve is opened when the room temperature becomes lower than the opening temperature of the valve, and the room temperature becomes higher than the closing temperature of the valve. Then, the valve is closed, and when the room temperature becomes lower than the operation start temperature of the blower, the operation of the blower is started, and when the room temperature becomes higher than the stop temperature of the blower, the operation of the blower is stopped.

(E) Action When the operation is started or during operation and the load is large and the room temperature is lower than the first set temperature which is set lower than the set temperature by the predetermined temperature, the room temperature is set higher than the set temperature by the predetermined temperature. The valve is opened, the blower is operated, and the rising operation of blowing hot air from the heat exchanger is performed until the second set temperature is reached, so that the entire room can be heated almost uniformly in a short time. Not only is it possible, but when the room temperature reaches the second set temperature, the valve closes,
The blower is stopped, excessive heating operation is prevented, and the operating cost can be reduced. Further, in the normal operation after such a rising operation, when the room temperature becomes lower than the opening temperature of the valve which is lower than the second set temperature, the valve is opened and natural convection and radiant heating by the heat exchanger are performed, and As a result, the valve closes when the room temperature rises above the valve closing temperature,
A decrease in room temperature is suppressed and an excessive increase in room temperature is prevented. And, in spite of this natural convection and radiant heating, when the room temperature further decreases and becomes lower than the operation start temperature of the blower, the blower starts operation and heating is performed by blowing hot air, and as a result, the room temperature rises. Then, when the blower reaches the stop temperature, the blower stops and automatic convection and radiant heating are performed, so it is possible to suppress excessive lowering of the room temperature, keep the room temperature close to the set temperature, and keep the room temperature below the second set temperature. It is possible to prevent the start-up operation from being performed frequently by preventing it from falling to the lower side, and further reduce the operation cost.

(F) Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 4 is a schematic cross-sectional view of a radiator such as a hot air heating device. In FIG. 4, (1) is a heat radiation panel provided on the front surface, (2) is the indoor air intake port on the lower surface, and (3). Is a hot air outlet on the upper surface, (4) is a heat exchanger housed in the warm air heating device, and (5) is a room for sending indoor air to the heat exchanger (4) to blow hot air from the radiator. A blower, (5a) is a fan of the blower, (M) is a motor for driving the fan, and (6) is a temperature detector such as a thermistor provided near the air suction port (2). Further, (7) is a hot water circulation pipe, and this hot water circulation pipe is for connecting the heat exchanger (4) and the heat radiation panel (1) in series, and further includes the hot water forward pipe (8), and It is connected to a heat source device (not shown) via a hot water return pipe (9). Further, (10) is a valve such as a heat operated valve provided upstream of the heat exchanger (4) of the hot water circulation pipe (7).

FIG. 1 is a block diagram of a radiator operation control device, in which (11) is a plurality of resistors (12), (13), (14), (1).
5) A reference voltage generating circuit consisting of a series circuit of the temperature control potentiometer (16), (17) is an amplifier circuit for inputting the midpoint voltage of the series circuit of the resistor (18) and the temperature detector (6). is there. Here, the amplifier circuit (17) is a buffer circuit composed of an operational amplifier or the like. (20) is a blower on / off circuit composed of a comparator or an operational amplifier having a feedback circuit. The blower on / off circuit (20) includes an output voltage of the amplifier circuit (17), a resistor (12),
(13) Input the voltage at the midpoint and. Further, (21) is a valve opening / closing circuit, and this valve opening / closing circuit (21) is composed of a comparator or an operational amplifier having a feedback circuit, and the output voltage of the amplifier circuit (17) and resistors (14), (15). Input the voltage of the middle point and. Further, (22) is a rising thermo-circuit, and this rising thermo-circuit (22) is composed of, for example, a comparator having a feedback circuit, an operational amplifier or the like, and the output voltage of the amplifier circuit (17) and the resistance (13), (14) Input the voltage at the midpoint and.

(25) is a first OR circuit, and this first OR circuit (2
5) inputs the signal from the blower on / off circuit (20) and the signal from the rising thermo circuit (22), and outputs the signal to the blower drive circuit (26) according to each signal. Where (2
3) is a hot water temperature detection circuit that outputs a signal corresponding to the temperature of hot water flowing through the heat exchanger (4) to the blower drive circuit (26). (27) is a first relay that operates based on a blower drive signal from the blower drive circuit (26). (28) is the second
This second OR circuit (28) inputs the signal from the valve opening / closing circuit (21) and the signal from the rising thermo circuit (22), and the valve driving circuit (29) according to each signal. Output signal to. Further, (30) is a second relay which operates based on a valve drive signal from the valve drive circuit (29). here,
When the first relay (27) is turned on, the fan motor (M) is energized, and when the second relay (30) is turned on, the valve (10) is energized.

The operation of the radiator will be described below with reference to the float chart of FIG. The user can change the room temperature
When the temperature is set to 20 ℃ and the operation switch (not shown) is turned on, the room temperature (temperature detected by the temperature detector) is 4deg below the set temperature.
If the temperature is lower than the low 16 ℃ (1st setting temperature), the resistance (1
3), (14) midpoint voltage and the output voltage from the amplifier circuit (17), the rising thermo-circuit (22) operates to send the H signal (high level signal) to the first and second OR circuits ( 25), (28)
Output to. Then, the second OR circuit (28) outputs an H signal to the valve drive circuit (29), the second relay (30) is turned on based on the valve drive signal from the valve drive circuit (29), and the valve (10 )
Opens. When the valve (10) opens, hot water circulates to the radiator, and the hot water temperature reaches an appropriate temperature, the blower drive circuit (20) is output based on signals from the first OR circuit (25) and the hot water temperature detection circuit (23). Outputs a blower drive signal. Then, based on the blower drive signal, the first relay (27) is turned on and the blower (5) starts operating. When the blower (5) starts its operation, hot air whose temperature has risen through the heat exchanger (4) is blown out from the outlet (3). Further, radiant heating from the heat radiation panel (1) is performed, the room temperature gradually rises, the voltage across the terminals of the temperature detector (6) gradually decreases, and the output voltage of the amplifier circuit (17) also gradually decreases.

Room temperature rises, for example 2deg higher than set temperature, valve (1
0) Closed temperature (eg 21 ° C which is 1deg higher than the set temperature), Stop temperature of blower (5) (eg 1deg lower than the set temperature 19
When the temperature reaches a second set temperature of 22 ° C., which is higher than (° C.), the rising thermo circuit (22) outputs the L signal (low level signal) instead of the H signal. When the rising thermo circuit (2) outputs the L signal, the blower on / off circuit (20) and the valve opening / closing circuit (21) receive the L signal from the first and second OR circuits (2).
5) and (28) output the L signal instead of the H signal. Then, the first and second relays (27) and (30) are turned off, and the valve (10)
Is closed and the operation of the blower (5) is stopped, and the rising operation of raising the room temperature lower than the first set temperature to the second set temperature or more at once is completed.

After that, when the room temperature gradually decreases and reaches the open temperature of the valve (10) (for example, 20 ° C of the set temperature), the midpoint voltage of the resistors (14) and (15) and the output voltage of the amplifier circuit (17) are set. Based on this, the H signal is output from the valve opening / closing circuit (21). And the second
The OR circuit (28) outputs the H signal, the valve (10) opens, hot water circulates in the heat exchanger (4) of the radiator and the heat radiation panel (1), and heating by radiation and natural convection starts. To be done.
When the room temperature rises due to heating and reaches the closing temperature of the valve (10) (for example, 21 ° C, which is 1deg higher than the set temperature), the valve opening / closing circuit (21)
The L signal is output from the second OR circuit (28), the L signal is output, the valve (10) is closed, and the radiant heating is stopped. After that, when the room temperature is lowered to the open temperature of the valve (10), the radiant heating is similarly started. In addition, when the room temperature drops due to a decrease in the outside air temperature and the operating temperature of the blower (5) reaches the operating temperature (for example, 18 ° C which is 2deg lower than the set temperature) despite the heating by radiation and natural convection, the resistance An H signal is output from the blower on / off circuit (20) based on the midpoint voltage of (12) and (13) and the output voltage of the amplifier circuit (17). Then, when the first OR circuit (25) outputs the H signal and the hot water temperature is at an appropriate temperature, the blower drive circuit (26) outputs the blower drive signal and the blower (5) starts operating.

The blower (5) starts operation, hot air blows into the room,
When convection heating is started, the room temperature rises, and when the temperature reaches a stop temperature (for example, 19 ° C., which is 1 deg lower than the set temperature), an L signal is output from the blower on / off circuit (20), and the blower (5) stops. After that, when the room temperature is lowered to reach the operation start temperature of the blower (5), the blower (5) starts operation in the same manner as above. When the room temperature rises and the valve (10) closes, the valve (10) closes, and the heat radiation panel (1) and the heat exchanger (4).
The hot water does not circulate and the heating is stopped. In addition, due to people entering and leaving the room, or outside air entering due to ventilation,
Even if the blower (5) is operating, if the room temperature falls and becomes lower than 16 ° C, the valve (10 ) Opens and the blower (5) continues to operate.

According to the radiator operation control method described above, at the start of operation of the radiator, the room temperature is the operation start temperature of the blower (5) and the valve (1
If it is lower than the first set temperature (16 ° C) lower than the open temperature of 0), the room temperature is higher than the stop temperature of the blower (5) and the closed temperature of the valve (10), and the second set temperature (22 ° C). The valve (10) is open and the blower (5) is operating until the temperature reaches (). Therefore, hot air is blown from the radiator and the room walls are cold until the room temperature reaches the second set temperature. In addition, the entire room can be heated almost uniformly in a short time, and when the room temperature reaches the second set temperature, the valve (10) is closed and the blower (5) is stopped, so that the radiator is excessive. The operation can be prevented, and as a result, the operation cost can be reduced. In addition, after the operation is started, when the room temperature drops significantly and becomes lower than the first set temperature, the valve (10) is opened and the blower (5) continues to operate until the second set temperature is reached. The entire room can be heated almost uniformly in a short time.

Further, by setting the operation start temperature of the blower during the radiator operation to be lower than the set temperature and setting the valve opening temperature to the set temperature, the room temperature often becomes lower than the first set temperature when the radiator is operated, 2 Operate the blower (5) until it reaches the set temperature,
Further, it is possible to prevent the valve (10) from being continuously opened, prevent excessive operation, further reduce the operation cost, and accurately maintain the room temperature near the set temperature.

In the above-described embodiment, the first and second set temperatures are set to be 4 deg lower and 2 deg higher than the set temperature, respectively, but the present invention is not limited to these temperatures.
For example, in a cold region, the first and second set temperatures may be set to a temperature 3 deg lower and a temperature 3 deg higher than the set temperature, respectively.
Also, in warm regions, the first set temperature may be set to 5 deg, for example.

Further, the hot water temperature detection circuit (23) prevents the blower (5) from operating regardless of the H signal of the rising thermo circuit (22) until the heat exchanger (4) is warmed up, and prevents blowout of cold air. If the heat exchanger (4) is warm, the blower (5) starts up and the thermo circuit (22)
Alternatively, the operation is started by the H signal of the blower on / off circuit (20), and the hot water temperature detection circuit (23) is not necessary when cold air prevention is not particularly required.

(G) Effect of the Invention The present invention is a radiator control method configured as described above, in which the load is large at the start of operation or during operation, and the room temperature is set to be lower than the set temperature by a predetermined temperature. 1
When the temperature is lower than the set temperature, the valve is opened and the blower is operated until the room temperature reaches the second set temperature which is set higher than the set temperature by the predetermined temperature, and warm air is blown out from the heat exchanger. Since the operation is performed, not only can the entire room be warmed almost uniformly in a short time, but when the room temperature reaches the second set temperature, the valve is closed and the blower is stopped, and the excessive heating operation is performed. Is prevented and the operating cost can be reduced. Further, in the normal operation after such a rising operation, when the room temperature becomes lower than the opening temperature of the valve lower than the second set temperature, the valve opens and natural convection and radiant heating by the heat exchanger are performed,
As a result, when the room temperature rises and becomes higher than the closing temperature of the valve, the valve closes, so that the decrease in room temperature is suppressed and the excessive rise in room temperature can be prevented. When the temperature drops further and becomes lower than the operation start temperature of the blower, the blower starts operation and heating is performed by blowing hot air.As a result, when the room temperature rises to the stop temperature of the blower, the blower stops. Since natural convection and radiant heating are performed, excessive lowering of the room temperature can be suppressed, the room temperature can be maintained near the set temperature, and the room temperature does not fall below the second set temperature, so that the rising operation is not frequently performed. With this, it is possible to further reduce the operating cost while performing a comfortable heating operation.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a block diagram of an operation control device for a radiator, and FIG.
FIG. 4 is a flow chart for explaining a radiator operating method, FIG. 3 is an explanatory diagram of operating temperatures of a valve and a fan, and FIG. 4 is a schematic sectional view of the radiator. (4) …… Heat exchanger, (5) …… Blower, (6) …… Temperature detector, (10) …… Valve.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shozo Kato 2-18 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A heat exchanger to which hot water is supplied from a heat source for natural convection and radiant heating, a valve for controlling the supply of hot water to the heat exchanger, and a blower for circulating indoor air to the heat exchanger. In an operation control method for a radiator including a temperature detector that detects a room temperature, a first set temperature that is a predetermined temperature lower than the set temperature and a set temperature that is lower than the set temperature according to a set temperature that is preset with respect to the room temperature. A second set temperature that is higher by a predetermined temperature is determined, and a valve open temperature between the first set temperature and the second set temperature, a valve closed temperature higher than the valve open temperature, and a valve open temperature higher than the valve open temperature. A low blower operation start temperature and a blower stop temperature that is higher than the blower operation start temperature and lower than the valve opening temperature are defined, and if the room temperature is lower than the first set temperature, the room temperature is 2 The valve is opened and the air is blown until it reaches the set temperature. In normal operation after completion of this rising operation, the valve is opened when the room temperature becomes lower than the opening temperature of the valve, and the valve is closed when the room temperature becomes higher than the closing temperature of the valve. A method for controlling the operation of a radiator, wherein the operation of the blower is started when the temperature becomes lower than the operation start temperature, and the operation of the blower is stopped when the room temperature becomes higher than the stop temperature of the fan.