JPH0126464B2 - - Google Patents

Description

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

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 device not only has the advantage of freeing you from the hassle of using only the air conditioner in the summer and installing various heating devices and gas or oil-fired devices in separate locations in the winter, but also The biggest advantage is that there is no risk of explosion or fire compared to gas or oil equipment. 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 with a water heater that can utilize exhaust heat during cooling operation and outside air heat to heat water in baths and kitchens. , which attempts to contribute to solving the above-mentioned problems.

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

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. A heating operation is performed in which indoor air is warmed by exchanging heat and absorbing outside air heat.

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 utilize this exhaust heat and outside air heat for boiling water for kitchen use and baths, and a schematic configuration diagram thereof is shown in FIG. 2. In the figure, the first
The same parts as in the figure are given the same numbers.

This device has a bath heat exchanger 9 and an auxiliary heat exchanger 10 for preheating city water inserted into the circuit between the high-pressure discharge side of the refrigerant compressor 1 and the four-way switching valve 2 in FIG. be. Bath heat exchanger 9 is connected to bathtub 2
1, and the auxiliary heat exchanger 10 is arranged in the preheating tank 11. Reference numerals 12 and 13 each indicate a bypass solenoid valve. A city water pipe 22 is connected in the preheating tank 11, and the heated water is connected to a shower 23 in the bathroom and a hot water faucet 24 through a heat exchanger in a gas water heater 31 at city water pressure. 32 is a gas pipe, and 25 is a heat exchanger cover. Note that the outlet of the preheating tank 11 is not necessarily connected to a gas water heater 31 in a kitchen or the like as shown in the figure. In other words, if a water heater that uses late-night electricity or a petroleum water heater is installed, connect it to the city water inlet.

According to such a device, it is possible to heat water for a bath or supply hot water to the kitchen or bathroom by using outside air heat or exhaust heat during cooling operation. You can boil and supply hot water. Furthermore, water can be heated even when cooling or heating is not required.

Each operation will be explained below.

Cooling and water heating operation Refrigerant compressor 1 → Bath heat exchanger 9 → Auxiliary heat exchanger 10 → Four-way switching valve 2 (solid line in the figure) → Outdoor heat exchanger 5 → Capillary 4 → Indoor heat exchanger 3 → Four-way switching valve 2 A refrigerant circulation circuit (solid line in the figure) → gas-liquid separator 6 → refrigerant compressor 1 is formed.
As a result, the high temperature refrigerant from the refrigerant compressor 1 exchanges heat with the water in the bathtub 21 in the bath heat exchanger 9 to heat the bath water, and further in the auxiliary heat exchanger 10 in the preheating tank 11. Preheats city water by exchanging heat with water. The refrigerant thus cooled and liquefied is further cooled by outdoor air in an outdoor heat exchanger 5, throttled in a capillary 4, and evaporated in an indoor heat exchanger 3 to cool indoor air, thereby performing air conditioning. Note that the outdoor blower 8 may be stopped if the refrigerant is sufficiently cooled by the bath heat exchanger 9 and the auxiliary heat exchanger 10.

Heating and water boiling operation Refrigerant compressor 1 → Bath heat exchanger 9 → Auxiliary heat exchanger 10 → Four-way switching valve 2 (broken line in the figure) → Indoor heat exchanger 3 → Capillary 4 → Outdoor heat exchanger 5 → Four-way switching valve 2 A refrigerant circulation circuit (broken line shown)→gas-liquid separator 6→refrigerant compressor 1 is formed.
As a result, the high temperature refrigerant from the refrigerant compressor 1 exchanges heat with the water in the bathtub 21 in the bath heat exchanger 9 to heat the bath water, and further in the auxiliary heat exchanger 10 in the preheating tank 11. Preheats city water by exchanging heat with water. This refrigerant further exchanges heat with indoor air in the indoor heat exchanger 3 to warm the indoor air. The refrigerant thus cooled and liquefied is throttled by the capillary 4, evaporated by the outdoor heat exchanger 5, absorbs outside air heat, and returns to the refrigerant compressor 1.

Water heating operation The same refrigerant circulation circuit as in heating and water heating operations is formed, but the indoor blower 7 is stopped. In other words, the refrigerant cooled by the bath heat exchanger 9 and the auxiliary heat exchanger 10 is sent to the capillary 4 without heat exchange by blowing indoor air, and is evaporated in the outdoor heat exchanger 5 to absorb outside air heat, thereby only boiling water. driving will be carried out. Note that a circuit that bypasses the indoor heat exchanger 3 may be formed. This type of operation is most suitable for spring and autumn when air conditioning and heating are not required.

As mentioned above, outside air heat and exhaust heat from cooling operation can be used as energy for boiling water.
Even during heating operation, a portion of the heating energy can be used to heat water. Furthermore, it is also possible to only boil water. In particular, if the heating capacity is insufficient due to boiling water during heating operation, a circuit that bypasses the bath heat exchanger 9 and the auxiliary heat exchanger 10 may be formed by opening the solenoid valve 12 and the solenoid valve 13. . Also, these solenoid valves 1
2 and 13 are for times when boiling water is not required and for bathtubs 21
It also opens when the water temperature inside reaches a predetermined value. Of course, if only cooling or heating operation is not required, the bypass circuit as described above may be omitted. Furthermore, the four-way switching valve 2 may be configured with four solenoid valves, or a three-way switching valve and a solenoid valve.

As is clear from the above description, the air conditioning system with a water heater according to the present invention has the following features.

It can be used only for boiling water even when air conditioning or heating is not required, increasing usage efficiency.

To utilize outside air heat and exhaust heat from cooling operation,
Annual energy costs for cooling, heating, and boiling water can be significantly reduced.

Since city water entering a gas water heater for kitchen or shower use can be preheated, the hot water capacity specification of the gas water heater can be lowered.

As described above, the heat pump water heater-equipped air conditioning system according to the present invention can utilize outside air heat and exhaust heat during cooling operation as energy for heating water. Furthermore, it has the safety features of conventional heat pump air conditioning systems, so it reduces the number of installation locations for gas or oil equipment, contributes to eliminating various risks, and provides air conditioning systems with water heaters that are inexpensive to maintain. can.

[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 is a capillary, 5 is an outdoor heat exchanger, 6 is a gas-liquid separator, 7 is an indoor blower, 8 is an outdoor blower, 9 is a bath heat exchanger, 10 is an auxiliary heat exchanger, 11 is a Preheating tank, 12 and 13 are solenoid valves, 2
1 is a bathtub, 22 is a city water pipe, 23 is a shower, 3
1 is a gas water heater, 32 is a gas pipe.

Claims (1)

[Claims] 1. In a heat pump air conditioning system in which an indoor heat exchanger, a refrigerant throttling resistor, an outdoor heat exchanger, etc. are connected to a refrigerant compressor via a four-way switching valve, the connection between the discharge side of the refrigerant compressor and the four-way switching valve is 1. A heat pump type air-conditioning device with a water heater, characterized in that a heat exchanger to be installed in a bathtub and a heat exchanger installed in a tank for preheating city water are inserted and connected to a circuit between the two.