JPH07260176A - Indoor device of hot water heater - Google Patents

Abstract

PURPOSE:To enable a hot air heating and a floor heating to be optionally carried out by a method wherein a bypassing circuit is arranged within a hot water storing tank so as to perform an indirect heating of water within the hot water storing tank and a flow rate of the bypassing circuit is adjusted by a flow rate adjusting valve arranged at the bypassing circuit. CONSTITUTION:On/Off operation of a pump 6 and a blower 6, i.e., operation of a floor heating and a hot air heating are carried out at an operating part 10 at a forward and upper part of a easing 4, and either one of or both floor heating and hot air heating can be performed concurrently. Only in the case of performing the hot air heating, the flow rate adjusting valve 16 in the bypassing circuit 14 is controlled together with the outdoor device (a heat source) 2 and the blower 6, and only for the floor heating, the outdoor device 2, the flow rate adjusting valve 13, the pump 16 are controlled. During a concurrent operation of the hot air heating and the floor heating, each of the outdoor device 2, the blower 6, the flow rate control valve 13 and the pump 16 is controlled. With such an arrangement as above, the hot water temperature within the hot water storing tank 11 is controlled to be such a temperature as one which is suitable for the hot air heating and/or the floor heating and then the hot air heating and the floor heating can be optionally carried out.

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 31 called a fan convector as shown in FIG. 2 and an outdoor unit 32 called an oil-fired hot water boiler and used as a heat source unit of the indoor unit 31. There is something. The indoor unit 31 is composed of a heat exchanger 33 that uses hot water from the outdoor unit 32 as a heat source, and a blower 34 that sends the air warmed by the heat exchanger 33 into the room, and the one outdoor unit 32 supplies hot water. It is composed of a boiler 35 that generates water, a cis tank 36 that stores hot water, a pump 37 that circulates hot water, and the like. An on-off valve 40 for adjusting the flow of hot water is provided in the. Further, the indoor unit 31 side has an operation operation unit 42 including a control unit 41 that controls the blower 34 and the like, and the outdoor unit 32 side has a control unit 43 that controls the boiler 35, the pump 37, the on-off valve 40, 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 the hot water generated by the outdoor unit, it would be convenient if, for example, the hot water flowing from the outdoor unit 32 into the indoor unit 31 could 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 32 to the heat exchanger
Since the temperature of hot water flowing into 33 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 33 to the outdoor unit 32 has dropped to about 60 ° C, it can be used for floor heating somehow, but to achieve such a hot water temperature, the blower 34 on the indoor unit 31 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 which a hot water storage tank for floor heating is provided in the housing, and a bypass circuit provided with a flow rate control valve is provided in the return pipe of the heat exchanger,
The bypass circuit is arranged in the hot water storage tank.

[0005]

With the above structure, the hot water flowing from the heat source unit to the heat exchanger of the indoor unit is not used for floor heating as it is, but a hot water storage tank for floor heating is provided in the indoor unit and the heat exchanger is used. A bypass circuit equipped with a flow rate control valve is provided in the return pipe, and this bypass circuit is placed in the hot water storage tank to indirectly warm the water in the hot water storage tank, and the flow rate control valve controls the flow rate to the bypass circuit. Since it is designed so that hot water suitable for floor heating can be obtained.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 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 floor heating. It is a 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 illustration is omitted on the side of one of the outdoor units 2,
A boiler that generates hot water as described in the conventional example, a cis tank that stores hot water, a pump that circulates the hot water, and the like are arranged. A hot water outflow pipe 7 between the outdoor unit 2 and the indoor unit 1.
And the return pipe 8 are connected. 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 a hot water storage tank 11 for floor heating is provided behind the housing 4 of the indoor unit 1 and a flow control valve 13 is provided in the return pipe 12 of the heat exchanger 5.
By providing a bypass circuit 14 provided with, and arranging the bypass circuit 14 in the hot water storage tank 11 to indirectly warm the water in the hot water storage tank 11, hot water for floor heating is obtained. In addition, a hot water temperature detecting means (temperature sensor) 15 is provided in the hot water storage tank 11, and when the hot water temperature is too high for floor heating, the control unit 9 judges the flow control valve 13 to restrict it to the bypass circuit 14. Reduce the amount of water exchange to reduce the amount of heat exchange, and if it is too low, loosen the flow rate control valve 13 to increase the amount of water flow to the bypass circuit 14 and increase the amount of heat exchange to generate hot water suitable for floor heating. That's what I did. The hot water in the hot water storage tank 11 thus generated is sent to the floor heating panel 3 through the pump 16 provided in the housing 4 and the outflow pipe 18 connected to the pipe connecting portion 17, and the floor heating panel 3 The cooled hot water from is returned to the hot water storage tank 11 via the return pipe 20 connected to the pipe connecting portion 19. In addition,
Reference numerals 21 and 22 are pipe connection portions for the outdoor unit 2, 23 is an inlet for indoor air, and 24 is an outlet for warm air.

The driving operation will be briefly described below.
ON / OFF operation of the pump 16 and the blower 6, that is, operation operation of floor heating and warm air heating can be performed by the operation operation unit 10 provided in the upper front part of the housing 4, and either floor heating or warm air heating can be performed. One or both can be done at the same time. If both floor heating and warm air heating are stopped, the outdoor unit (heat source unit) 2, the blower 6, the pump 16 and so on are all stopped, and only the warm air heating together with the outdoor unit 2 and the blower 6 is the flow control valve 13 of the bypass circuit Is controlled, the heat source unit 2, the flow rate control valve 13, and the pump 16 are controlled only by floor heating, and the heat source unit 2, the blower 6, the flow rate control valve 13, and the pump 16 are respectively operated in the simultaneous operation of warm air heating and floor heating. It is controlled.

[0009]

The hot water heater as described above does not directly use the hot water circulated in the heat exchanger for floor heating, but indirectly uses the hot water in the return pipe of the heat exchanger. The hot water generated in the hot water storage tank is used for floor heating, and the hot water temperature in the hot water storage tank is controlled to a temperature suitable for floor heating, so comfortable floor heating Not only can it be operated, but it can also be operated simultaneously with warm air heating, which is convenient, and because it requires only one outdoor unit, it saves construction work and results in a cheaper heating system.

[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 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 Case 5 Heat exchanger 6 Blower 9 Control unit 10 Operation unit 11 Hot water storage tank 12 Return pipe 13 Flow control valve 14 Bypass circuit 15 Hot water temperature Detection means (temperature sensor) 16 Pump 17 Piping connection 19 Piping connection

Claims (4)

[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, a hot water storage tank for floor heating was provided in the housing, and a flow control valve was provided in the return pipe of the heat exchanger. An indoor unit of a hot water heater, wherein a bypass circuit is provided and the bypass circuit is arranged in the hot water storage tank. 2. The indoor unit of the hot water heater according to claim 1, wherein the hot water storage tank is provided with a hot water temperature detecting means, and the flow rate control valve is controlled based on a detection result of the detecting means. 3. The indoor unit of a hot water heater according to claim 1, wherein a pump for floor heating is provided in the housing. 4. The indoor unit of a hot water heater according to claim 1, wherein the housing is provided with a pipe connection portion for floor heating.