JPH05223404A - Hot water feeding, heating and cooling device - Google Patents

Abstract

PURPOSE:To provide a hot water feeding, heating and cooling device for a complex housing in which its system price is reduced without reducing coefficient of performance during cooling operation even through its function is set at the same level. CONSTITUTION:At outlet side water circuit 4 of a hot water feeder 1 having an inlet side water circuit 2 is provided with a mixing valve 21. Further, the mixing valve is connected to a bypassing pipe 22 of which one end is connected to the inlet side water circuit 2, and the other end of it is provided with a circulating pump 5, a buffer tank 6, a temperature sensor 35, a hot water supply-pipe 7 and a hot water return pipe 8, its extremity end is connected to the inlet side water circuit 2 through a temperature sensor 36 and then hot water is circulated in an entire housing. A heating or cooling supply pipe 23, a water-cooled heat exchanger 24 and a heating return pipe 25 are arranged from the hot water supply pipe 7 and they are connected to the hot water return pipe 8. In turn, a refrigerant heat exchanger 30 and a water-cooled heat exchanger 24 arranged in a cooling or heating refrigerant circuit 26 are crossed to each other at a right angle so as to construct the cooling or heating circuit and at the same time the hot water feeding-out pipe 9 is taken out of the heating or cooling supply pipe 23. Upon detection of temperature, if a continuous detection of the fact that the temperature sensor 36 shows a higher temperature than that of the temperature sensor 35, the control for reducing the middle temperature of the hot water is carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply / cooling system for hot water supply in a central residential building used in an apartment house or the like.

[0002]

2. Description of the Related Art As a representative example of a conventional hot water supply heating / cooling apparatus for a central residential building, there is one shown in FIG. The configuration will be described below.

As shown in FIG. 2, a water heater 1 for central hot water supply of a residential building is provided with a water supply pipe 3 in an inlet side water circuit 2 and a buffer tank 6 in an outlet side water circuit 4 via a circulation pump 5. ing. A hot water supply pipe 7 from the buffer tank 6 to each dwelling unit is connected to each floor of the dwelling and each dwelling unit, and is connected to a hot water supply return pipe 8 at its tip. Hot water supply return pipe 8
The other end of is connected to the inlet side water circuit 2 of the water heater 1. The hot water outlet pipe 9 communicates with the hot water supply forward pipe 7 at one end and is provided with a mixing valve 10 at the other end.

The absorption type chiller / heater 11 for heating and cooling is connected to the cooling tower 12, the outward pipe 13 and the return pipe 14, and the return pipe 14 is provided with a circulation pump 15. The absorption type water heater 11
A warm / cool water return pipe 16 is laid in parallel with the hot water supply forward pipe 7 and hot water return pipe 8 on each floor and each unit of the dwelling through a circulation pump 17, and at the tip of the hot / cool water return pipe 18 In addition to being connected, the other end is connected back to the absorption chiller / heater 11. One end of the warming / cooling circuit 19 of each dwelling unit is connected to the warming / cooling water outgoing pipe 16 and the other end is connected to the warming / cooling water returning pipe 18. The warming / cooling radiator 20 is connected to the warming / cooling circuit 19. It is configured.

In this hot water supply heating / cooling device, high-temperature hot water (60 to 85 ° C.) is produced by the water heater 1 and is circulated by the circulation pump 5 through the hot water supply pipe 7 over the entire living building. In each dwelling unit, this hot water is mixed with water by a mixing tap 10 provided on a tap pipe 9 to obtain hot water of a desired temperature.

Next, during heating, high-temperature hot water (for example, 75 ° C.) is produced by the absorption chiller / heater 11 and is circulated by the circulation pump 17 through the warm / cool water outflow pipe 16 over the entire residential building. This high-temperature hot water is heated by a heating / cooling radiator 20 connected to a heating / cooling circuit 19 in each dwelling unit.

During cooling, cold water is produced by the absorption chiller / heater 11 and the cooling tower 12, and is circulated by the circulation pump 17 through the warm / cool water return pipe 16 over the entire living building. In each dwelling unit, this cold water is cooled by a heating / cooling radiator 20 connected to a heating / cooling circuit 19.

[0008]

However, in the above-mentioned conventional structure, it is necessary to provide a total of four reciprocating pipes 7 and 8 for hot water supply and reciprocating pipes 16 and 18 for heating and cooling in the entire residential building. The cost was high due to the large amount of time and complicated construction. Further, the absorption chiller / heater 11 and the cooling tower 12 for producing cooling / heating water are high in initial cost. For these reasons, there is a problem that the central hot-water supply / cooling device for hot water supply in the residential building has good performance and function, but is expensive.

The present invention solves the above problems, and an object of the present invention is to provide a device for heating and cooling a hot water supply for a central building, etc., which has a high efficiency (coefficient of performance) during cooling and a low initial cost. It is what

[0010]

In order to achieve the above object, the present invention has a water heater having an inlet side water circuit, an outlet side water circuit of the water heater and an inlet side connected to the inlet side water circuit. A hot and cold water mixing valve, a circulation pump, a buffer tank, and a temperature sensor A, which are connected to the outlet side of the mixing valve, are provided in this order, and a hot water supply forward pipe connected to each room and a hot water supply forward pipe Connect one end to the tip and connect the hot water supply return pipe connected to the inlet side water circuit via the temperature sensor B, the hot water return pipe to the hot water return pipe, and the hot water return pipe to the hot air return pipe. A heat pump type heating / cooling circuit comprising a water cooling type heat exchanger for the formed circulation path and a refrigerant circulation circuit for heating / cooling having a refrigerant heat exchanger, a compressor, an indoor radiator, etc. having a heat exchange relationship with the heat exchanger. The hot water outlet pipe connected to the cooling outward pipe and connected to each room Sensor B is, upon detecting a temperature higher than the temperature detected by the temperature sensor A, the temperature of the hot water, in which a control unit for controlling so as to reduce than before.

[0011]

According to the present invention, with the above-described structure, hot water is produced by the water heater and circulated throughout the building by the circulation pump, hot water is directly discharged from the hot water, and a water-cooled heat exchanger is used for heating by the heat pump type heating and cooling circuit. The refrigerant is heated through it, and is cooled by a compressor or the like in the refrigerant circuit at the time of cooling, and the heat is radiated by the refrigerant heat exchanger and absorbed by the water-cooled heat exchanger. As a result, for example, while having a central hot water supply heating / cooling function for the residential building, the entire residential building can be satisfied with only the reciprocating pipe of the hot water supply pipe, and the temperature of the hot water circulating through the water-cooled heat exchanger can be kept in winter. By varying the spring and autumn seasons and the summer, and lowering the summer, a hot water supply heating / cooling system with low initial cost can be realized without lowering the coefficient of performance during cooling.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, a water heater 1 for central hot water supply in a residential building has a water supply pipe 3 in an inlet side water circuit 2 and a mixing valve 21 in an outlet side water circuit 4. The mixing valve 21 has one inlet,
It is connected to the bypass pipe 22 taken out from the inlet side water circuit 2 and has a circulation pump 5 and a buffer tank 6 at the other outlet. From the buffer tank 6 to the temperature sensor A3
A hot-water supply forward pipe 7 is connected via 5. The hot water supply forward pipe 7 is piped to each dwelling unit on each floor, the tip of the hot water supply forward pipe 7 is connected to one end of the hot water supply return pipe 8, and the other end of the hot water supply return pipe 8 is connected to the inlet side via a temperature sensor B36. It is connected to the water circuit 2.

Next, as a heat pump type heating / cooling circuit, the heating / cooling outward pipe 23 is taken out from the hot water supply forward pipe 7, and a water cooling type heat exchanger 24 and a heating / cooling return pipe 25 are provided in this order, and a hot water return pipe 8 is provided. It is directly connected. As the heating / cooling refrigerant circulation circuit 26 to be combined with the water-cooling type heat exchanger 24 provided in the heating / cooling outward pipe 23, an Aki-umleter 27, a compressor 28, a four-way valve 29,
Refrigerant heat exchanger 30, check valve A31, capillary 32,
The expansion valve 33 and the indoor radiator 34 are arranged in this order, and the end is connected to the four-way valve 29 to form a loop. The water-cooled heat exchanger 2
4 and the refrigerant heat exchanger 30 are orthogonal to each other.

Further, for hot water supply, the booster 3 in which the hot water outlet pipe 9 is taken out from the warming / cooling outward pipe 23 and the heater 37 is built in the tip end
The mixing valve 10 is provided via the valve 8. A controller 39 receives signals from the temperature sensors 35 and 36 and controls the water heater 1 and the mixing valve 21.

In the above structure, the water heater 1 produces medium temperature water of 45 ° C. in the winter, spring and autumn seasons and 35 ° C. in the summer, and the circulation pump 5 is used to supply hot water to each floor and each unit of the dwelling unit. It is circulated and returned to the water heater 1 by the hot water supply return pipe 8.

First, regarding hot water supply, in each dwelling unit, the hot water supply pipe 7 is directly connected to the hot water supply pipe 7 at 45 ° C. or 3 ° C.
Medium temperature water at 5 ° C. is tapped through the mixing valve 10. In this case, while 45 ° C in the winter, spring, and autumn seasons is the most frequent hot water temperature, 35 ° C in the summer is considered to be more consistent than the actual conditions of use, but as a convenience, it is heated. It is necessary to have a function that can
A booster 38 for heating to a hot water temperature of not less than 35 ° C and not less than 35 ° C is provided. Further, even when high-temperature hot water is supplied to the hot water for the bath, it can be realized by the booster 38.

Next, heating will be described. A water-cooled heat exchanger 24 in which medium temperature water at 45 ° C. circulates in the winter, spring and autumn seasons.
The heat of the refrigerant is obtained in the orthogonal refrigerant heat exchanger 30, and the circulation circuit 2 for heating and cooling from the compressor 28 through the four-way valve 29.
The high-temperature refrigerant is sent to 6, and the indoor radiator 34 heats it.

Further, in terms of cooling, the four-way valve 29
To change the circulation direction of the refrigerant for cooling. The refrigerant that has exchanged heat with the warm indoor air in the indoor radiator 34 and has increased in temperature is a refrigerant heat exchanger (generally called an outdoor radiator).
In a system path where the water is cooled by being absorbed by a water-cooled heat exchanger 24 which circulates hot water of 35 ° C. at 30 only in summer and is sent to an indoor radiator 34 via a capillary 32 and an expansion valve 33. It is for cooling. That is, when cooling is started, the heating / cooling return pipe 2 is passed through the water cooling type heat exchanger 24.
The heat will be recovered in the hot water in 5. Therefore, the hot water temperature of the hot water supply return pipe 8 which is directly connected to the hot and cold air return pipe 25 becomes higher than the hot water temperature of the hot water supply forward pipe 7. This is detected by the temperature sensor A35 and the temperature sensor B36, that is, the temperature sensor A
When the temperature detected by the temperature sensor B36 becomes higher than the temperature detected by the temperature sensor 35, and the temperature detection continues in this manner, the controller 39 detects summer, and the mixing valve 21 is controlled to control the mixing ratio of hot water and water. To change the temperature of the medium temperature water to 35 ° C.

In this way, when the temperature of the hot water in the hot water supply pipe 8 becomes higher than that in the hot water supply pipe 7 by recovering the heat, the water is not heated in the hot water supply device 1 and is passed through the hot water supply device 1 as it is, and the mixing valve 21. The water from the bypass pipe 22 is mixed at 45 ℃ in winter, spring, and autumn.
In the summer, the temperature is set to 35 ° C. and the circulation pump 5 circulates the entire living building as described above.

According to the configuration of this embodiment, by circulating medium-temperature water of 45 ° C. to the hot water supply outflow pipe 7 and the hot water supply return pipe 8 of the entire dwelling, it becomes easy to maintain heat in the piping work, and the piping work The cost can be reduced. Furthermore, by providing the mixing valve 21 in the outlet side water circuit 4 of the water heater 1 and recovering heat by the water cooling type heat exchanger 24 during cooling, it is possible that the hot water in the hot water return pipe 8 is at 45 ° C. or higher. Water heater 1
It is possible to reduce the running cost by not having to drive the car. In addition, although it is an ordinary heat pump type cooling and heating circuit, the water cooling type heat exchanger 24 at the time of heating is 45
Since it is medium temperature water at ℃, and it is higher than the normal outdoor temperature in winter, it is possible to achieve satisfactory high temperature heating.

[0021]

As described above, according to the present invention, the hot water for hot water is circulated throughout the building, and the heat exchanger for the refrigerant and the water-cooled heat exchanger for the hot water are exchanged with each other.
In addition, in summer and other seasons, the temperature of the hot water is changed to operate, so it is possible to operate without lowering the coefficient of performance during cooling.
With this piping, it is possible to provide a device with low initial cost as a central building hot water heating and cooling system.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a hot water supply / cooling device for a central residential building in an embodiment of the present invention

[Fig. 2] Configuration diagram of a conventional hot water supply / cooling system for central hot water supply of a residential building

[Explanation of symbols]

 1 Hot Water Heater 2 Inlet Side Water Circuit 4 Outlet Side Water Circuit 5 Circulation Pump 6 Buffer Tank 7 Hot Water Supply Outgoing Pipe 8 Hot Water Return Pipe 9 Hot Water Outlet Pipe 10 Mixing Valve 23 Heating / Cooling Outgoing Pipe 24 Water Cooling Heat Exchanger 25 Heating / Cooling Return Pipe 26 Refrigerant circuit for cooling and heating 30 Refrigerant heat exchanger 35 Temperature sensor A 36 Temperature sensor B

Claims (1)

[Claims] 1. A water heater having an inlet side water circuit, an outlet side water circuit of the water heater and a mixing valve having an inlet side connected to the inlet side water circuit, and a connecting valve connected to an outlet side of the mixing valve, A circulation pump, a buffer tank, and a temperature sensor A are provided in this order, and one end is connected to the hot water supply forward pipe that is piped toward each room, and the tip of the hot water supply forward pipe is connected to the inlet side water circuit via the temperature sensor B. A connected hot water return pipe, a hot and cold air return pipe connected to this hot water return pipe, and a water-cooled heat exchanger in a circulation path formed by connecting a hot and cold air forward pipe to the hot water return pipe, and a refrigerant having a heat exchange relationship with this A heat pump type heating / cooling circuit including a heating / cooling refrigerant circulation circuit having a heat exchanger, a compressor, an indoor radiator, and the like.
A hot water outlet pipe connected to the heating / cooling outward pipe and connected to each room,
When the temperature sensor B detects a temperature higher than the temperature detected by the temperature sensor A, a controller for controlling the temperature of the hot water to be lowered so as to be lower than that until then.