JPH07260175A - Indoor device of hot water heater - Google Patents

Abstract

PURPOSE:To perform optionally a hot air heating and a floor heating by a method wherein hot water for the floor heating is obtained from an indoor device of a hot water heater. CONSTITUTION:A hot water heater is comprised of an indoor device 1 and an outdoor device 2. Within a easing 4 of the indoor device 1 are present a heat exchanger 5 with hot water acting as a heat source and a blower 6 for feeding hot air into a room. Within the outdoor device 2 are installed a boiler for generating hot water, a cistern for storing hot water, a pump for circulating hot water and an opening or closing valve for adjusting a flow of hot water. A temperature of hot water to be circulated in a floor heating panel 3 is properly 60 deg.C or less and in turn a temperature of hot water flowing from the outdoor device 2 into the heat exchanger 5 is high to be about 80 deg.C, resulting in that the hot water may not be used for the floor heating as it is. As means for solving the problem described above, a hot water pipe 11 of the heat exchanger 5 is made to be a double-structure, the inner hot water pipe is connected to the floor heating panel 3 and then the outer hot water pipe connected to the outdoor device 2 acting as a heat source for the hot water. With such an arrangement as above, hot water required for the floor heating can be optionally obtained under a heat transfer inside the hot water pipe 11.

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 an indoor unit 21 called a fan convector as shown in FIG. 3 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 the hot water from the outdoor unit 22 as a heat source, and a blower 24 that sends the air warmed by the heat exchanger 23 into the room, and the one outdoor unit 22 supplies hot water. It is composed of a boiler 25 that produces water, a cis tank 26 that stores hot water, a pump 27 that circulates hot water, and the like.The outdoor unit 22 and the indoor unit 21 are connected by a hot water forward pipe 28 and a return pipe 29, and a forward pipe 28. An on-off valve 30 for adjusting the flow of hot water is provided in the. Further, the indoor unit 21 side has an operation operation unit 32 including a control unit 31 that controls the blower 24 and the like, and the outdoor unit 22 side has a control unit 33 that controls the boiler 25, the pump 27, the on-off valve 30, and the like. Yes, both are connected by a signal line.

[0003]

By the way, a heater using hot water has floor heating in addition to the warm water (warm air) heater configured as described above. Since all of these use hot water generated by the outdoor unit, it is convenient if, for example, the hot water flowing from the outdoor unit 22 into the indoor unit 21 can be used for floor heating. However, the temperature of hot water used for floor heating is 6
0 ° C or less is suitable, while the outdoor unit 22 to the heat exchanger
Since the temperature of the hot water flowing into 23 is as high as about 80 ° C, it cannot be used for floor heating as it is. Also,
Since the temperature of the hot water returning from the heat exchanger 23 to the outdoor unit 22 has dropped to about 60 ° C, it can be used for floor heating somehow, but to achieve such a hot water temperature, the blower 24 on the indoor unit 21 side must be operated. It was impossible to perform only floor heating because of the requirement that it must be done. 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 a heat exchanger using hot water as a heat source in a housing and an air warmed by the heat exchanger are provided in a room. In the one provided with a blower or the like for delivering to the above, the hot water pipe of the heat exchanger has a double structure, the inner hot water pipe is connected to the floor heating panel, and the outer hot water pipe is connected to the heat source device.

[0005]

With the above structure, the hot water pipes constituting the heat exchanger have a double structure, the inner hot water pipes are connected to the floor heating panel, and the outer hot water pipes are connected to the heat source unit. The hot water from the inside indirectly heats the water in the hot water pipe, and the hot water becomes hot water suitable for floor heating, so floor heating and hot air heating as in the past can be performed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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), 3
Is a floor heating panel. On the side of the indoor unit 1, a heat exchanger 5 that uses hot water from the outdoor unit 2 as a heat source and a blower 6 that sends the air warmed by the heat exchanger 5 to the room are arranged in the housing 4. Although not shown, on the one outdoor unit 2 side, a boiler for generating hot water as described in the conventional example, a cis tank for storing hot water, a pump for circulating the hot water, and the like are arranged. The outdoor unit 2 and the indoor unit 1 are connected by a hot water forward pipe 7 and a return pipe 8. Further, the indoor unit 1 side has an operation operation unit 10 having a control unit 9 for controlling the blower 6 and the like, and the outdoor unit 2 side includes an internal boiler, a pump, an on-off valve, etc. although not shown. There is a control unit for controlling, and both are connected by a signal line.

The feature of this embodiment is that the hot water pipe 11 used in the heat exchanger 5 has a double structure consisting of an inner hot water pipe 11a and an outer hot water pipe 11b as shown in FIG. The hot water pipe 11a is connected to the floor heating panel 3 side, the outer hot water pipe 11b is connected to the heat source device 2 side, and hot water is stored in the hot water path 12 inside the housing 4 connecting the heat exchanger 5 and the floor heating panel 3. A tank 13 and a pump 14 are provided, and further, a water supply port 15 leading to the hot water pipe 11a is provided at the upper part of the housing 4, and a detachable floor heating pipe connection part 16 is provided at the lower rear part. The hot water storage tank 13 is surrounded by a heat insulating material, and the forward pipe 7 from the heat source device 2 to the heat exchanger 5 is provided.
Since the return pipe 8 from the heat exchanger 5 to the heat source device 2 and the hot water pipe 11b on the heat exchanger 5 side cannot be directly connected due to the structure of the hot water pipe 11 side, as shown in FIG. Connecting pipe
17 are used.

With such a structure, when hot water (about 80 ° C.) from the heat source device 2 is supplied to the heat exchanger 5, the hot water pipe 11
The water in the hot water pipe 11a is warmed by the internal heat conduction, and becomes hot water of about 60 ° C suitable for floor heating. When the floor heating operation is performed, the hot water generated in the heat exchanger 5 (hot water pipe 11a) is passed through the hot water storage tank 13 at the lower part, and is flown into the floor heating panel 3 through the pump 14 and the outgoing pipe 18 and returned. It is returned to the heat exchanger 5 via the pipe 19. ON / O of pump 14 and blower 6
The FF operation, that is, the operation operation of the floor heating and the warm air heating can be performed by the operation operation unit 10 provided in the upper front part of the housing 4,
Either one or both of floor heating and warm air heating can be performed at the same time. If both floor heating and warm air heating are stopped, the blower 6, pump 14 and heat source unit 2 are all stopped,
The blower 6 and the heat source device 2 are controlled only by warm air heating,
The pump 14 and the heat source device 2 are controlled only by the floor heating, and the blower 6, the pump 14, and the heat source device 2 are controlled respectively by the combined use of the hot air heating and the floor heating.

[0009]

According to the hot water heater as described above, the hot water circulated in the heat exchanger is not used for floor heating as it is, but is generated by heat conduction inside the hot water pipe of the heat exchanger. Since the hot water that is generated is used for floor heating, the temperature of the hot water does not become too high, and it is possible not only to use hot air heating with a fan convector and floor heating, but also to operate floor heating only. In addition, since there is an insulated container for hot water storage in the hot water path for floor heating, hot water can be supplied to the floor heating panel when floor heating starts, which is effective for warming the floor surface more quickly. Since only a stand is required, the labor of construction can be saved, and the heating system can be cheaper.

[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 enlarged perspective view of a main part of the heat exchanger showing the embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of a conventional hot water heater.

[Explanation of symbols]

 1 Indoor unit (fan convector) 2 Outdoor unit (heat source unit) 3 Floor heating panel 4 Housing 5 Heat exchanger 6 Blower 9 Control unit 10 Operation control unit 11 Hot water pipe 11a Inside hot water pipe 11b Outside hot water pipe 12 Hot water path 13 Hot water storage tank 14 Pump 15 Water inlet 16 Piping connection 17 Connection pipe

Claims (5)

[Claims] 1. A heat exchanger using hot water as a heat source in a housing,
In the one provided with a blower or the like for sending the air warmed by the heat exchanger into the room, the hot water pipe of the heat exchanger has a double structure, the inner hot water pipe is the floor heating panel, and the outer hot water pipe is An indoor unit of a hot water heater characterized in that it is connected to each heat source unit. 2. The indoor unit of a hot water heater according to claim 1, wherein a pump is provided in a hot water path inside the housing connecting the heat exchanger and the floor heating panel. 3. The indoor unit of a hot water heater according to claim 1, wherein a hot water storage tank and the pump are provided in a hot water path connecting the heat exchanger and the floor heating panel. 4. The indoor unit of a hot water heater according to claim 1, wherein the housing is provided with a detachable pipe connection portion for floor heating. 5. The indoor unit of a hot water heater according to claim 1, wherein the housing is provided with a water supply port for floor heating.