JPH0126467B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat pump air conditioning system, and more particularly to a novel air conditioning system that has a new function of using outside air heat and exhaust heat during cooling operation to boil water.

BACKGROUND ART In recent years, heating and cooling devices that can perform both cooling and heating with the same device have become popular in general households. This not only has the advantage of freeing you from the hassle of using only the air conditioner in the summer and installing and using various heating devices, especially gas and oil burners, in separate locations in the winter, but also The biggest advantage over other devices is that there is no risk of explosion or fire. However, even with this widespread use, it is still necessary to use gas or petroleum equipment to supply hot water for baths or kitchens in ordinary households, and the risks of explosion, fire, and even gas poisoning are completely eliminated. The current situation is that this cannot be said. In particular, managers of apartments and leased condominiums are burdened with both physical and mental management to prevent the above-mentioned risks.

The present invention focuses on the economical efficiency and safety of heat pump type air conditioners and provides a heat pump type air conditioner and water heater that can utilize exhaust heat during cooling operation and outside air heat to heat water for showers and baths. The purpose of this project is to contribute to resolving these problems.

The present invention also seeks to provide a heat pump type air-conditioning/heating water heater that requires less space for installation.

This will be explained below with reference to the drawings.

FIG. 1 is a schematic diagram of a conventional heat pump air-conditioning system.

A refrigerant compressor 1 is connected to a heat exchanger 3 with indoor air via a pilot type four-way switching valve 2 that utilizes differential pressure.
A capillary 4 as a refrigerant throttling resistor and a heat exchanger 5 with outdoor air are connected. 6 is a gas-liquid separator, 7 is an indoor blower that takes in indoor air and blows it indoors through the indoor heat exchanger 3, and 8 is an outdoor blower that takes in outside air and discharges it outside through the outdoor heat exchanger 5.

In this device, a four-way switching valve 2 switches between cooling operation and heating operation. That is, as shown by the solid line in the figure, the high-pressure, high-temperature refrigerant from the refrigerant compressor 1 is radiated outdoors through the heat exchanger 5 by the four-way switching valve 2, liquefied, then squeezed by the capillary 4, and evaporated by the heat exchanger 3. As a result, a cooling operation is performed to cool the indoor air. Also, as shown by the broken line, the high-pressure, high-temperature refrigerant from the refrigerant compressor 1 is radiated into the room through the heat exchanger 3 by the four-way switching valve 2, liquefied, and then squeezed by the capillary 4. By exchanging the air and absorbing the outside air heat, a heating operation is performed in which the outside air heat is used to warm the indoor air.

As is clear from the above explanation, thermal energy is discharged outdoors through the heat exchanger 5 during cooling operation.

The present invention makes it possible to use this exhaust heat and outside air heat to heat water for showers and baths.
FIG. 2 shows a schematic diagram of its configuration. In the figure, parts with the same names as those in FIG. 1 are given the same numbers.

This device has a municipal water heat exchanger 9 installed in a hot water tank 10 inserted and connected between the discharge side of a refrigerant compressor 1 and a four-way switching valve 2, and an indoor heat exchanger 3 and a capillary 4. A solenoid valve 13 and a capillary 4' are connected in parallel to each other. 11, 12,
14 are solenoid valves.

Each component including the water supply tank 10 forms a bathroom 30 and is connected to an outer wall 3 on the side that is in contact with the outside air.
2'. This outer wall 32' is a hollow body that is thicker than the other outer walls 32, and is provided to the other outer walls 32 via reinforcing members 33. The indoor heat exchange means using the indoor heat exchanger 3 and the indoor blower 7 is as follows:
The upper part of the bathroom 30 communicates with the living room via a duct 34. The duct 34 has an indoor air intake path and an indoor air discharge path.
Further, the outdoor heat exchange means including the outdoor heat exchanger 5 and the outdoor blower 8 is configured to communicate with the outside air so that it can take in outside air and discharge it through the outdoor heat exchanger 5.

The hot water supply water tank 10 is covered with a heat insulating material and is provided together with the refrigerant compressor 1 at the lower part of the outer wall 22'. A city water pipe 15, a bath water return pipe 16, and a drain pipe (not shown) are connected to the lower part of the hot water supply water tank 10, and a drop hot water pipe 17 and a shower pipe 18 are connected to the upper part. There is. The city water pipe 15 and the drop hot water pipe 17 are provided with electromagnetic valves 19 and 20, respectively. In addition, the bath water return pipe 16 includes a pump 21 and a check valve 22.
is provided and led out from the inner wall of the outer wall 32' into the bathtub 31. Once water is injected into the hot water tank 10 in this way, the check valve 2
2, the pump 21 is always in a primed state, and the pump 21 is configured to only allow water to flow from the bathtub 31 to the hot water tank 10. 35
36 is a filter.

This device includes a four-way switching valve 2 and solenoid valves 11 to 1.
4, 19, 20, and opening/closing operation of the kettle 35 can realize six operating modes: cooling mode, cooling and bath water heating mode, heating mode, heating and bath water heating mode, bath water heating mode, and shower water heating mode.

Each operation mode will be explained below.

Cooling mode Refrigerant compressor 1 → Solenoid valve 12 → City water heat exchanger 9 → ｜ ↑ ｜ ｜ ｜ ｜ → Solenoid valve 11―――――――――― Four-way switching valve 2 (solid line in the diagram) → Outdoor heat Exchanger 5
→ Capillary 4 → Indoor heat exchanger 3 → Solenoid valve 14 →
A refrigerant circulation circuit including the four-way switching valve 2 (solid line in the figure) → the gas-liquid separator 6 → the refrigerant compressor 1 is formed. In this case, since both the solenoid valves 11 and 12 are open, a portion of the high-pressure, high-temperature refrigerant from the refrigerant compressor 1 radiates heat to the water in the tank 10 through the city water heat exchanger 9, and furthermore, the outdoor blower 8 is operated. As a result, heat is radiated in the outdoor heat exchanger 5 and the water is cooled and liquefied. This liquefied refrigerant is in capillary 4
The indoor air is throttled and evaporated in the indoor heat exchanger 3 by the operation of the indoor blower 7 to cool the indoor air, thus performing the cooling operation. In addition, water tank 10 for hot water supply
An over-rise prevention thermostat is provided inside, and when the water temperature reaches a predetermined value, the solenoid valve 11 remains open and the solenoid valve 12 is closed.

Cooling and bath water boiling mode When heating bath water, solenoid valve 19→
Water is supplied into the bathtub 31 via the hot water supply water tank 10→electromagnetic valve 20 route. When the water supply is finished, a circuit is formed to close the solenoid valve 11 in the refrigerant circulation circuit in the cooling mode, and the outdoor blower 8 is stopped. Also, bathtub 31 → check valve 22 → pump 21 → hot water tank 10 → solenoid valve 20 →
A bath water circulation circuit called a bathtub 31 is formed to heat the bath water while circulating it. Of course, in the indoor heat exchanger 3, cooling operation is performed in the same manner as in the cooling mode described above. When the bath water temperature reaches the set value, the circulation is stopped, and the refrigerant circulation circuit shifts to a cooling mode by opening the solenoid valve 11, closing the solenoid valve 12, and driving the outdoor blower 8. In this mode, it is possible to effectively utilize waste heat generated by air conditioning and to reduce power consumption by stopping the outdoor blower 8.

Heating mode Refrigerant compressor 1 → Solenoid valve 11 → Four-way switching valve 2
(Dotted line in the diagram) → Solenoid valve 14 → Indoor heat exchanger 3 →
A refrigerant circulation circuit is formed from the capillary 4 to the outdoor heat exchanger 5 to the four-way switching valve 2 to the gas-liquid separator 6 to the refrigerant compressor 1. That is, the solenoid valve 11 is opened,
The solenoid valve 12 is closed so that the high-pressure, high-temperature refrigerant from the refrigerant compressor 1 bypasses the city water heat exchanger 9. Therefore, the high-pressure high-temperature refrigerant is transferred to the indoor blower 7.
During operation, the indoor heat exchanger 3 radiates heat and performs heating. The refrigerant thus cooled and liquefied is evaporated in the outdoor heat exchanger 5 by the operation of the outdoor blower 8 which is throttled by the capillary 4 and absorbs outside air heat.

Heating and Bath Water Boiling Mode When heating bath water, water is supplied into the bathtub 31 in the same manner as water is supplied to the bathtub 31 in the cooling and bath water heating mode. When the water supply is completed, a circuit is formed in which the solenoid valve 12 is opened and the solenoid valve 11 is closed in the refrigerant circulation circuit in the heating mode. Then, in the same way as the bath water heating in the cooling and bath water heating modes, a bath water circulation circuit is formed and the bath water is heated while being circulated. Of course, heating operation is performed in the indoor heat exchanger 3 in the same manner as in the above heating mode, and the outdoor heat exchanger 5 absorbs outside air heat. When the bath water temperature reaches the set value, it shifts to heating mode.

Bath Water Boiling Mode When heating bath water, water is supplied into the bathtub 31 in the same manner as water is supplied to the bathtub 31 in the cooling and bath water boiling modes. When water supply is finished, refrigerant compressor 1 → solenoid valve 12 → municipal water heat exchanger 9 → four-way switching valve 2 (broken line in the figure) → solenoid valve 13 → capillary 4' → outdoor heat exchanger 5 → four-way switching valve 2 ( A refrigerant circulation circuit consisting of the broken line in the figure) → gas-liquid separator 6 → refrigerant compressor 1 is formed.
Then, in the same way as the bath water heating in the cooling and bath water heating modes, a bath water circulation circuit is formed and the bath water is heated while being circulated. In this mode, the solenoid valve 13 is opened, the solenoid valve 14 is closed, and the indoor blower 7 is stopped. In this way, the high pressure and high temperature refrigerant from the refrigerant compressor 1 is transferred to the municipal water heat exchanger 9.
Most of the heat is radiated and liquefied, and the capillary 4'
The air is throttled and evaporated in the outdoor heat exchanger 5 by the operation of the outdoor blower 8 to absorb outside air heat. That is, it is operated so that the outside air heat absorbed by the outdoor heat exchanger 5 is used only for boiling water.

Shower water heating mode In this mode, a refrigerant circulation circuit similar to the bath water heating mode is formed. Also pump 21
is not driven, and the solenoid valve 20 is also closed, and the solenoid valve 19
In the open state, the water in the hot water supply water tank 10 is heated. When the water temperature reaches the set value, refrigerant circulation is stopped to save power. If you open the Kotoku 35, you can freely use the hot water shower provided by the city's water pressure. Furthermore, in the shower hot water supply mode after the bath water has been boiled, the solenoid valve 20 can be further opened and used as a drop-in hot water.

In addition, if the setting value of the thermostat installed in the hot water supply water tank 10 is set higher than the appropriate temperature for bath water, connect a city water pipe to the shower pipe 17 to make it possible to adjust the water temperature, or
It would be a good idea to make it possible to supply city water to the area. Further, the operation control and switching control of each mode may be manual, automatic, or a combination of these, and detailed explanations will be omitted.

As explained above, the heat pump type air-conditioning/heating water heater according to the present invention has the following effects.

In addition to air conditioning or heating, outdoor heat and exhaust heat from air conditioning operation can be used as a heat source for showering and bath water heating, making it possible to significantly reduce energy costs throughout the year.

Since it can be used for cooling or heating, or for heating water while also heating water, the device can be used effectively throughout the year.

In addition to boiling water for the bath, you can also use the shower as a drop-in bath.

It is safe and easy to refill because it does not produce boiling water like the conventional external heated bathtub.

By heating the bathroom and changing room, it is possible to use the shower only during times other than summer.

Bath water is heated while forced circulation of bath water, so the heat flow through the municipal water heat exchanger is large.
Boiling time can be reduced compared to natural convection water heaters.

Compared to the conventional installation of air conditioning equipment, bath water heating equipment, and hot water tank for showers separately, the integrated configuration simplifies installation work and reduces installation space. Overall cost reduction can be achieved.

By reducing the number of installation locations for gas or oil equipment, it is possible to contribute to eliminating various dangers.

Note that the present invention is not limited to the embodiments. For example, the solenoid valves 19 and 20 may be made of a Kotsuk type, or the bypass circuit of the indoor heat exchanger 3 and the capillary 4 may be replaced with only the solenoid valve 13. A bypass configuration may also be used. In addition, the initial change of each mode can be performed manually or automatically using known technology.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a conventional heat pump air-conditioning system, and FIG. 2 is a schematic diagram of an embodiment of the present invention. In the figure, 1 is a refrigerant compressor, 2 is a four-way switching valve, and 3 is a refrigerant compressor.
is an indoor heat exchanger, 4 and 4' are capillaries, 5 is an outdoor heat exchanger, 6 is a gas-liquid separator, 9 is a municipal water heat exchanger, 10 is a water tank for hot water supply, 11, 12, 13,
14, 19, 20 are solenoid valves, 15 is city water pipe, 2
1 is the pump.

Claims (1)

[Claims] 1 Refrigerant compressor, first heat exchanger to be installed in the water tank for hot water supply, second heat exchanger to exchange heat with indoor air
Each component including a heat exchanger, a third heat exchanger for exchanging heat with outdoor air, a refrigerant throttling resistor, and a four-way switching valve, and the hot water tank is installed within the outer wall of the bathroom. A heat pump type air-conditioning/heating water heating device that is characterized by the built-in heat pump type.