JP2000121076A - Hot-water heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce wasteful energy consumption due to a circulation pump without any trouble for operation. SOLUTION: The present apparatus is adapted such that it includes a heat source machine composed of a heating apparatus for heating a heat exchanger 5, a hot water circulation pump 7 capable of varying an output, an expansion tank 15 having a degassing function from circulated water, and the heat source machine and a plurality of terminals 12, 19 are connected through piping. Herein, an output of the hot water circulation pump 7 is made variable corresponding to the number of operation of the terminals 12, 19. Hereby, there are ensured energy saving and silencing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating apparatus that heats and circulates water as a heat medium and uses it for heating and other purposes.

[0002]

2. Description of the Related Art A conventional hot water circulation pump of this type of hot water heating apparatus generally has a constant output.

[0003]

However, in the above-mentioned conventional hot water heating apparatus, the output of the hot water circulation pump is constant, so that wasteful energy consumption is large. That is, at the start of operation or when air is mixed in the hot water pipe, the hot water circulation pump needs a relatively high output, but when the normal operation state is reached, such a large output is not required. In addition, when many terminals are connected and operated, the pump needs high output, but when only one system is connected and operated, not much output is required. During normal operation,
There is a problem that unnecessary energy is consumed when the number of connected terminals is small.

[0004]

In order to solve the above-mentioned problems, the present invention is configured to change the output of the hot water circulation pump at a predetermined timing and operation.

[0005] According to the above-mentioned invention, by making the necessary pump output when necessary, an energy-saving and quieter hot water heating apparatus can be obtained.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot water heating apparatus according to a first aspect of the present invention includes a heat exchanger for heating water, a heating apparatus for heating the heat exchanger, a hot water circulation pump capable of changing the output, and a circulation system. In a heat source unit provided with an expansion tank having a function of venting water, and in a hot water heating device in which a plurality of terminals are connected by hot water piping and electrical wiring, the output of the circulation pump is varied according to the number of operating terminals. It has a main controller configured for trimming. When the number of operating terminals is large, the pump for hot water circulation is set to a high output, and when the number of terminals is small, the output is set to a low output. it can.

[0007] The hot water heating apparatus according to claim 2 of the present invention comprises:
It has a trial run switch and has a main controller configured so that when the switch is turned on, the pump output is set to a maximum output.
When the test operation switch is turned on, the pump is set to the maximum output irrespective of the number of connected terminals, so that the air bleeding operation in the hot water pipe can be performed in a short time.

[0008] The hot water heating apparatus according to claim 3 of the present invention comprises:
The hot water circulation circuit includes a flow rate sensor, and has a main controller configured to control a pump output so that a flow rate is set in advance according to the number of operating terminals. The flow rate sensor detects the amount of circulation of hot water and controls the output of the pump so that the flow rate is set in accordance with the number of operating terminals, thereby achieving more accurate energy saving.

[0009] The hot water heating apparatus according to claim 4 of the present invention comprises:
There is a main controller configured to increase the pump output by a predetermined value for a predetermined time at the beginning of operation. By increasing the amount of hot water circulation at the beginning of operation, the amount of heat transported to the terminal can be increased, and for example, the initial startup performance of heating (warm up quickly) can be improved.

[0010] The hot water heating apparatus according to claim 5 of the present invention comprises:
A main controller configured to control the pump output to be lower than a normal value by a predetermined value when the operation switch is turned on. When the operation switch is set to “ON”, the pump output is controlled to be lower than the normal value by a predetermined value, so that the noise related to the operation of the pump can be suppressed to be low and the mode can be set to the energy saving mode.

[0011] The hot water heating apparatus according to claim 6 of the present invention comprises:
A main controller configured to control the output of the pump to be lower by a predetermined value when the shut-off valve of the terminal becomes “closed”; When the shut-off valve of the terminal is closed, the output of the pump is controlled to be lower by a predetermined value, so that the water hammer effect that occurs when the shut-off valve is closed can be suppressed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a configuration diagram of a gas hot water heating apparatus according to Embodiment 1 of the present invention. FIG. 2 shows an example of the output characteristics of the variable output pump used in the present invention, and FIG. 3 shows the contents controlled by the main controller, that is, the number of operating terminals and the output characteristics of the pump.

In FIG. 1, 1 is an exterior body, 2 is an air supply port for gas combustion air, 3 is a gas amount controller, 4 is a gas combustion section, and 3 and 4 constitute a heater. 5 is a heat exchanger, 6 is an exhaust gas exhaust gas outlet, 7 is a variable output hot water circulation pump, 8 is a hot water temperature sensor, 9 is a heat exchanger hot water outlet pipe, 1
0 is a hot water transfer pipe, 11 is a shutoff valve of the hot water heating terminal A, 12 is a hot water heating terminal A, 13 is a hot water transfer return pipe,
14 is a hot water return pipe, 15 is an expansion tank that absorbs air from the circulating water and absorbs expansion and contraction, 16 is a main controller, 17 is a terminal wiring A, 18 is a shutoff valve of a hot water heating terminal B, and 19 is a hot water heating terminal. Machines B and 20 indicate terminal wiring B, and 17 and 1
Numeral 9 is electrically connected to the 15 main controllers, and transmits the electric signal to each of them in conjunction with the shut-off valve of the terminal. The main controller 15 is configured to receive them and determine the number of operating units.

The variable output hot water circulation pump 7 is
It shows the characteristics as shown in FIG. That is, in the figure,
The horizontal axis indicates the amount of hot water circulation, and the vertical axis indicates the pump head.
Is a characteristic obtained at the time of each pump output, p is a head required for conveying hot water by the present apparatus, a is a circulating flow rate at the head p when operated at the pump output A, and b is a pump output. B and c indicate the circulatable flow rate at the pump output C. As an example of the variable means, by changing the supply current and voltage to the pump 7 through the main controller 16, the rotation speed of the pump impeller changes, and as a result, the output changes.

Further, the main controller 16 is configured to control the pump output so as to have a characteristic as shown in FIG. That is, the number of operating terminals is shown on the horizontal axis, and the pump output is shown on the vertical axis,
For example, when the number of operating terminals is two, the output of the pump 7 is a.

Next, the operation and operation will be described. The circulating water for heating is pressurized by a pump 7 for circulating hot water and is supplied to a heat exchanger 5.
And heated by the heaters 3 and 4. At that time, hot water outgoing pipe 9
Is controlled by the operation of the hot water temperature sensor 8, the gas amount controller 3 and the main controller 16 so that the temperature becomes 80.degree. Then, the circulating water is transferred to the terminal A / terminal B via the hot water transfer pipe 10 to the terminal A and the terminal B, and the circulating hot water whose temperature has been lowered by performing a heating function there is passed through the hot water transfer transfer return pipe 13 to the hot water return pipe 1.
4. Continuous operation by flowing to the expansion tank 15 and being pressurized by the pump 7 again.

At this time, the main controller 16 controls the output of the pump 7 corresponding to the information on the number of operating terminals obtained through the terminal wirings 17 and 20. That is, as shown in FIG. 3, if the number of operating terminals is two, the output of the pump 7 is controlled so that the output becomes low.

(Embodiment 2) FIG. 4 shows a configuration of a hot water heating apparatus according to Embodiment 2 of the present invention.

The second embodiment is different from the first embodiment in that a switch for starting the test operation of the apparatus is provided in the main controller 21 in FIG. Test run switch 2
When 2 is turned on, the main controller 21 is configured to start operation at the maximum output of the pump 7.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted. Next, the operation and operation will be described. When the test operation switch provided in the main controller 21 is turned on, the pump 7 operates at the maximum output. In general, this type of pump may show an inoperative state, which is caused by being left for a long period of time in a stopped state, a so-called pump lock state.At this time, when the pump is operated at the maximum output, the maximum torque is obtained. The state can be released. Further, in a state where air is present in the hot water transport pipes 10, 13 and the like, for example, during a test operation after installation, it is necessary to perform an air venting operation in this kind of apparatus. , The air bleeding operation can be performed quickly. Further, when the control for changing the circulating flow rate is adopted, when the flow rate becomes insufficient due to unexpectedness, it can be used as a function for backing up.

(Embodiment 3) FIG. 5 shows a configuration of a hot water heating apparatus according to Embodiment 3 of the present invention. FIG. 6 shows the contents controlled by the main controller, that is, characteristic examples of the number of operating terminals and the amount of hot water circulation.

The third embodiment differs from the first embodiment in that a flow rate sensor 24 is provided in the hot water return pipe 14 as shown in FIG. 5 so that the flow rate is set in advance in accordance with the number of operating terminals. In addition, the main controller 23 is configured to control the output of the pump 7.

The main controller 23 receives the value detected by the flow sensor 24 and controls the output of the pump 7 so as to obtain the characteristics shown in FIG. In FIG. 6, the horizontal axis indicates the number of terminals in the operating state, and the vertical axis indicates the amount of hot water circulation required for operating the device. For example, if the number of terminals in the operating state is two, the amount of hot water circulation Is controlled by the main controller 23 so that the output of the pump 7 becomes 4 liters / minute.

The components having the same reference numerals as in the first embodiment have the same structure, and the description will be omitted. Next, the operation and operation will be described. The main controller 23 controls the hot water circulation amount shown by the characteristic in FIG. 6 based on the information on the number of operating terminals obtained through the terminal wirings 17 and 20.

At this time, the main controller 23 performs feedback control based on the detection value of the flow sensor 24. In the first embodiment, the output of the pump 7 is controlled to be a preset output value, whereas in the present embodiment, the output of the pump 7 is controlled to be a preset circulation flow rate. Example 1
Then, the amount of circulation can be said to be a kind of progressive control.
Generally, in this kind of heating device, it is necessary to secure a circulation amount in order for the terminal device to exhibit a predetermined heating performance, and the control method of this embodiment is more accurate. Generally, the length of the hot water transport pipe is different and the pressure loss differs depending on the terminal device, so that an energy saving effect according to the situation can be obtained.

(Embodiment 4) FIG. 7 shows control characteristics of a main controller in a hot water heating apparatus according to Embodiment 4 of the present invention.

The fourth embodiment differs from the first embodiment in that the main controller in FIG. 1 sets the output of the pump 7 higher by a predetermined value for a predetermined period of time at the beginning of operation as shown in FIG. The point is that the controller is configured.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted. Next, the operation and the operation will be described. In FIG. 7, when the horizontal axis represents the elapsed time from the start of the operation and the vertical axis represents the output of the circulating pump, the time t is at the beginning of the operation,
By controlling the output of the pump 7 to be increased by (p1−p2), the output of the pump 7 at the initial stage of operation is increased, and the circulation flow rate is increased. And the initial operation start-up performance of the device is improved. Generally, about 30 to 60 minutes is sufficient, and after warming up to a certain extent, the apparatus can be set to a normal state to obtain a comfortable and power-saving device.

(Embodiment 5) The fifth embodiment differs from the first embodiment in that an operation switch is provided in the main controller in FIG. The main controller is configured to perform control by a predetermined value lower.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted. Next, the operation and the operation will be described. When the operation switch provided in the main controller is turned on, the output of the pump 7 is controlled by a predetermined value lower than a normal value at a level that does not hinder the operation. In addition, the vibration level and operation noise of the pump 7 are reduced, and the heating performance of the terminal is slightly lowered due to a decrease in the amount of hot water transported. In general, this type of device can be expected to have a large effect because it often causes problems with the noise and vibration of the pump as a household air conditioner used for a long time. Also, since the power consumption of the pump is large, keeping the output low even a little leads to a large energy saving effect. In particular, it is effective for seasonal heating except the cold season.

(Embodiment 6) Embodiment 6 differs from Embodiment 1 in that the main controller in FIG.
The main controller is configured to control the output of the pump 7 to be lower than the normal value by a predetermined value when the closing valves 11 and 18 of the valves 2 and 19 are closed.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted. Next, the operation and the operation will be described. When the shut-off valve 11 of the terminal device A indicated by 12 is "closed", the main controller controls the output of the pump 7 to be lower than the normal value by a predetermined value. A sudden change in pressure generated when the door closes is reduced, and water hammer noise can be suppressed. The effect is particularly great when a plurality of terminals are operated. That is, when only one terminal is operated, the pump 7 and the heating devices 3 and 4 may be stopped,
When a plurality of units are operated and only one unit is stopped, the operation of the heat source unit needs to be continued, so that the pump 7 and the heating units 3 and 4 cannot be stopped easily. In the gas heating apparatus as in the first embodiment, there is a problem that an ignition sound is generated when the apparatus is restarted. In addition, when only the pump 7 is stopped, the heating medium is heated even though there is no flow. Therefore, if the shut-off valve is closed while the output of the pump 7 is low, the shut-off valve is closed while preventing the above-mentioned side effects.
Water hammering noise can be suppressed.

[0034]

As is clear from the above description, the output of the hot water heating apparatus according to the first aspect of the present invention can be varied between a heat exchanger for heating water and a heating apparatus for heating the heat exchanger. A heat source unit having a hot water circulation pump and an expansion tank having a function of removing air from the circulating water, and a hot water heating device in which a plurality of terminals are connected by hot water piping and electrical wiring, according to the number of operating terminals, Since the output of the circulating pump is made variable, it is possible to reduce the power consumption of the pump without hindering operation, and to obtain an efficient hot water heater.

Further, the hot water heating apparatus according to the second aspect of the present invention has a trial operation switch, and when the switch is turned on, the pump output is set to the maximum output. This has the effect that it can be implemented.

The hot water heating apparatus according to a third aspect of the present invention is provided with a flow rate sensor in the hot water circulation circuit, and controls the pump output so that the flow rate becomes a preset flow rate according to the number of operating terminals. Therefore, there is an effect that more accurate energy saving can be achieved.

Further, in the hot water heating apparatus according to the fourth aspect, the pump output is increased by a predetermined value for a predetermined time at the beginning of operation, so that the initial startup performance of heating (rapid heating) can be improved. There is an effect that can be done.

Further, the hot water heating apparatus according to claim 5 is configured such that when the operation switch is turned on, the pump output is controlled to be lower than the normal value by a predetermined value, so that the noise relating to the operation of the pump is reduced. This has the effect of being able to keep it low and to achieve the energy saving mode.

In the hot water heating apparatus according to claim 6, when the shut-off valve of the terminal is closed, the output of the pump is controlled to be lower by a predetermined value so that the shut-off valve of the terminal can be controlled. The water hammer sound generated when closing can be easily realized without side effects.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a gas hot water heating apparatus according to a first embodiment of the present invention.

FIG. 2 is an output characteristic diagram of a variable output pump of the apparatus.

FIG. 3 is a diagram showing the number of operating terminals of the apparatus and the output characteristics of the pump.

FIG. 4 is a configuration diagram of a hot water heating apparatus according to a second embodiment of the present invention.

FIG. 5 is a configuration diagram of a hot water heating apparatus according to a third embodiment of the present invention.

FIG. 6 is a characteristic diagram of the number of operating terminals of the apparatus and the amount of hot water circulation.

FIG. 7 is a control characteristic diagram of a main controller in a hot water heating apparatus according to a fourth embodiment of the present invention.

[Explanation of symbols]

 5 Heat Exchanger 7 Hot Water Circulation Pump 8 Hot Water Temperature Sensor 10 Hot Water Conveying Outgoing Pipe 12 Hot Water Heating Terminal A 13 Hot Water Conveying Return Pipe 16 Main Controller 17 Terminal Wiring A 22 Trial Run Switch 24 Flow Sensor

Claims (6)

[Claims] 1. A heat source device comprising: a heat exchanger for heating water; a heating device for heating the heat exchanger; a circulating pump capable of varying the output; and an expansion tank having a function of releasing air from the circulating water.
In a hot water heating apparatus in which the heat source unit and a plurality of terminals are connected by piping, a hot water heating apparatus including a main controller that varies an output of the circulation pump in accordance with the number of operating terminals. 2. The hot water heating apparatus according to claim 1, wherein the main controller has a trial operation switch, and controls the circulating pump output to a maximum output when the switch is turned on. 3. The hot water circulation circuit includes a flow rate sensor, and the main controller controls the output of the circulation pump so that the flow rate becomes a preset flow rate according to the number of operating terminals.
A hot water heating device as described. 4. The hot water heating apparatus according to claim 1, wherein the main controller controls the circulating pump output to increase by a predetermined value for a predetermined time at the beginning of operation. 5. A hot water heating apparatus wherein a main controller controls a circulation pump output to be lower than a normal value by a predetermined value when an operation switch is turned on. 6. The hot water heating apparatus according to claim 1, wherein the main controller controls the output of the circulation pump to be lower by a predetermined value when the closing valve of the terminal is closed.