JPH0828888A - Indoor machine for hot water heater - Google Patents

Abstract

PURPOSE:To improve amenity by alternately carrying out a hot air heating by a fan convector and a floor heating using the hot water of the fan convector. CONSTITUTION:A hot water heater comprises an indoor machine 1 referred to as a fan convector and an outdoor machine 2 for producing hot water. The indoor machine 1 side is provided with a heat exchanger 7 using the hot water as a heat source, a blower 8 for supplying hot air indoor and a control part 12 for controlling the blower 8 or the like. The outdoor machine 1 is connected to the indoor machine 2 by a feed pipe 9 and a return pipe 10 of the hot water. The return pipe 10 is provided with a three-way valve 11 for switching the flow of the hot water and a floor heating panel 3. When the blower 8 is stopped during a hot air heating operation, the water channel of the three-way valve 11 is switched to the floor heating panel 3 side to perform a floor heating. When the operation of the blower 8 is resumed, the water channel of the three- way valve 11 is returned to the outdoor machine 1 side to carry out a hot air heating operation. In this way, the hot air heating and the floor heating are alternately carried out, so that temperature on a floor surface and a part in the vicinity thereof can be stabilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the construction of an indoor unit of a hot water heater called a fan convector.

[0002]

2. Description of the Related Art A hot water heater includes, for example, an indoor unit 21 called a fan convector as shown in FIG. 4 and an outdoor unit 22 called an oil-fired hot water boiler and used as a heat source unit of the indoor unit 21. There is something. The indoor unit 21 is composed of a heat exchanger 23 that uses hot water from the outdoor unit 22 as a heat source, and a blower 24 that sends out the air warmed by the heat exchanger 23 to the room, and the one outdoor unit 22 supplies hot water. The boiler 25 is generated, a cis tank 26 that stores hot water, a pump 27 that circulates the hot water, and the like are connected. The outdoor unit 22 and the indoor unit 21 are connected by a hot water forward pipe 28 and a return pipe 29. Further, the indoor unit 21 side has a driving operation unit 31 having a control unit 30 for controlling the blower 24 and the like, and a temperature sensor 32 for detecting room temperature, and the outdoor unit 22 side has a boiler.
25, a control unit 33 for controlling the pump 27, etc., and both control units 3
0 and 33 are connected by a signal line (not shown).

[0003]

By the way, in the indoor unit 21 of the hot water heater configured as described above, for example, when the room temperature rises to a set value, the operation of the blower 24 is stopped. The sensible temperature differs between when the blower 24 is operating and when it is stopped, and the warm air in particular rises to the ceiling, so the temperature difference between the feet (near the floor) during operation and when the operation is stopped. Can be felt big. It is considered that the combined use with floor heating is effective for solving this point, but the temperature of the hot water circulating from the outdoor unit 22 to the indoor unit 21 is as high as about 80 ° C, while on the other hand, the temperature of the floor heating is 80 ° C ~ 6
Hard panel that uses warm water of 0 ℃, 60 ℃ ～ 40 ℃
There was a soft panel that used the hot water of, and it was difficult to deal with it. Therefore, it is an object of the present invention to solve these problems and provide an indoor unit of a hot water heater in which hot water flowing through a heat exchanger can be used for floor heating.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a housing provided with an indoor air inlet at the upper rear portion and an indoor air outlet at the lower front portion. A heat exchanger that uses hot water as a heat source, a blower that sends the air warmed by the heat exchanger into the room, and a controller that controls the blower, etc. A three-way valve that switches the flow of hot water is provided in the return pipe of the hot water path that connects the heat source unit that circulates and the heat exchanger, and a floor heating panel is connected between the three-way valve and the return pipe to provide warm air heating. When the operation of the blower is stopped during operation, the water passage of the three-way valve is switched to the floor heating panel side until the operation of the blower is started.

[0005]

With the above configuration, warm air heating by the indoor unit (fan vector) and floor heating by the floor heating panel can be alternately performed with hot water from one heat source unit, and the ventilation of the indoor unit can be stopped. It is possible to reduce the change in sensible temperature that accompanies it.

[0006]

Embodiments of the present invention will be described below with reference to FIGS. Fig. 1 shows the schematic configuration of a hot water heater and the relationship between floor heating. 1 is an indoor unit of a hot water heater (fan convector), 2 is an outdoor unit of a hot water heater (heat source unit), and 3 is an indoor unit. It is a floor heating panel (hard panel) that uses hot water (80 ° C to 60 ° C) returned from 1 as it is. Reference numeral 4 denotes a housing of the indoor unit 1, which has an inlet 5 for indoor air in an upper rear part of the housing 4 and an outlet 6 to the room in a lower front part thereof.
Inside the heat exchanger 7 that uses hot water from the outdoor unit 2 as a heat source
And a blower 8 for sending the air warmed by the heat exchanger 7 into the room. Although not shown in the drawings, a boiler that generates hot water, a cis tank that stores hot water, a pump that circulates the hot water, and the like are arranged on the outdoor unit 2 side. The outdoor unit 2 and the indoor unit 1 are connected by a hot water outflow pipe 9 and a return pipe 10 to form a return pipe.
The 10 is provided with a three-way valve 11 capable of switching the flow of hot water to the floor heating panel 3 when the blower 8 is stopped. Further, the indoor unit 1 side has an operation unit 13 having a control unit 12 for controlling the blower 8 and the three-way valve 11 and the like, and a temperature sensor 14 for detecting the room temperature, which is not shown on the outdoor unit 2 side. There is a control unit (not shown) for controlling the boiler, the pump and the like, and both control units are connected by a signal line (not shown).

FIG. 2 shows the relationship between the blower 8 and the three-way valve 11 during warm air heating and floor heating. In warm air heating, the blower 8 is shown.
Is turned on, and the hot water returned from the heat exchanger 7 flows into the outdoor unit 2 through the three-way valve 11. When the room temperature rises to the set value due to warm air heating, the blower 8 receives an OF command from the control unit 12.
F, the outlet of the three-way valve 11 is switched from the return pipe 10 side to the connection pipe 15 side with the floor heating panel 3, and floor heating is started. Hot water returned from the floor heating panel 3 is returned to the outdoor unit 2 through the connection pipe 16 and the return pipe 10. Also, when the room temperature falls below a predetermined value, the original hot air heating is switched to. By alternately performing warm air heating and floor heating in this way, it is possible to suppress changes in the temperature below the feet. Fig. 3 shows that the rated hot water temperature is 6
It shows a case where a floor heating panel 3 (soft panel) of 0 ° C to 40 ° C is used. If the rated hot water temperature is low as described above, the hot water from the heat exchanger 7 cannot be used as it is. The flow control valve 17 is controlled until it becomes the following. This is because by limiting the flow of hot water in this way, hot water suitable for the soft panel 3 can be obtained even when the blower 8 is stopped.

[0008]

As described above, in the hot water heater as described above, since warm air heating and floor heating are alternately performed, not only the upper body but also the feet can be warmed, and the sensible temperature can be improved. The unevenness is suppressed and comfort is improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a hot water heater showing an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of a three-way valve or the like according to the present invention.

FIG. 3 is a schematic configuration diagram of a hot water heater showing another embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a hot water heater showing a conventional example.

[Explanation of symbols]

 1 Indoor unit (fan convector) 2 Outdoor unit (oil-fired hot water boiler) 3 Floor heating panel 4 Enclosure 7 Heat exchanger 8 Blower 11 Three-way valve 12 Control unit 13 Operation control unit 14 Temperature sensor 15 Connection pipe 16 Connection pipe 16a Connection Pipe 17 Flow control valve 18 Means for detecting hot water temperature

Claims (2)

[Claims] 1. A heat exchanger using hot water as a heat source and a heat exchanger for warming the inside of a casing having an indoor air intake port in the upper rear part and an indoor air outlet in the lower front part. In a device provided with a blower that sends out the air to the room and a control unit that controls the blower and the like, hot water is supplied to a return pipe of a hot water path that connects the heat exchanger with the heat source device that generates and circulates the hot water. A three-way valve that switches the flow is provided, and a floor heating panel is connected between the three-way valve and the return pipe, and if the operation of the blower is stopped during warm air heating operation, the three-way valve is operated until the operation of the blower is started. An indoor unit of a hot water heater, characterized in that the water passage of the valve is switched to the floor heating panel side. 2. When the rated hot water temperature of the floor heating panel is below a predetermined value, a flow rate control valve and a hot water temperature detecting means are provided in the connecting pipe of the floor heating panel to keep the hot water temperature below the predetermined value. The indoor unit of the hot water heater according to claim 1, wherein the flow rate is adjusted so as to achieve the above.