JPS6014067A - Air-conditioning hot-water supply device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a device that uses a heat pump to perform heating and cooling as well as hot water supply at the same time, and particularly relates to a heating, cooling, and hot water supply device that is highly energy efficient and economical.

[Background of the invention]

The prior art will be explained with reference to FIG. In Fig. 1, 1 is a compressor, 2 is a four-way valve, 3 is a hot water supply tank, 4 is a heat exchanger installed in the hot water supply tank, 6 is an indoor heat exchanger, 7-
1 is an expansion valve for cooling, 7-2 is an expansion valve for heating, 8 is an outdoor heat exchanger, 10-1 is a check valve that closes the flow during cooling, 1
0-2 indicates a check valve that closes the flow during heating. In such a configuration, the refrigerant leaving the compressor 1 during heating is separated into two directions, one of which is condensed and liquefied in the heat exchanger 4 provided in the hot water supply tank 3 to heat the water supply. The other one passes through the four-way valve 2, condenses and liquefies in the indoor heat exchanger 6, performs a heating action, flows through the check valve 1O-1, joins with the liquid refrigerant coming out of the heat exchanger 4, and enters the expansion valve 7-2. The pressure is reduced in the outdoor heat exchanger 8 and heat is obtained from the outside air, and the steam is drawn into the compressor 1. During cooling, by switching the four-way valve 2, the refrigerant flows into the heat exchanger 4 in the hot water supply tank 3. On the other hand, the refrigerant flowing in the direction of the four-way valve 2 radiates heat in the outdoor heat exchanger 8 and is condensed and liquefied.
After passing through the check valve 10-2, the refrigerant joins with the refrigerant exiting the heat exchanger 4, is depressurized by the expansion valve 7-1, and is evaporated by removing heat from the room in the indoor heat exchanger 6, thereby performing a cooling action. As explained above, in the conventional technology, hot water can be supplied at the same time as heating, and hot water can be supplied at the same time as cooling. However, since a part of the refrigerant is always branched to the hot water supply heat exchanger 4, depending on the state of the hot water tank, cooling or cooling can be performed simultaneously.
A problem arises in that the refrigerant flow rate distribution between the heating circuit and the hot water supply circuit changes, making it impossible to provide stable hot water supply. Also,
Since heating, cooling, and hot water supply must always be performed at the same time, daytime power must be used, which is not only a problem in that it cannot contribute to cutting power peaks, but is also problematic in terms of economic efficiency.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an air-conditioning/heating-water supply device that can perform heating and cooling economically while supplying hot water stably at all times.

[Summary of the invention]

A heat exchanger for hot water supply is installed in the middle of the high-temperature piping between the compressor and the four-way valve, and a part of the condensation heat of the vapor refrigerant is constantly used for hot water supply using the total discharge gas amount, and the remaining The coefficient of performance of the equipment is improved by using the condensed heat for space heating in the winter and for preheating water for hot water supply in the summer. In addition, since it has a cold storage tank for heating and cooling, low-cost late-night electricity can be used. In addition, by using solar heat as a heating heat source or a preheating heat source for hot water supply water, it is possible to further improve the coefficient of performance and expand the operating range, and by using this solar heat as a heat source for preheating water supply in a hot water supply system, energy can be used effectively. The aim is to

(Embodiment of the Invention) The present invention will be described in detail below with reference to an embodiment shown in FIGS. 2 to 7.

1 is a compressor, which is connected through a discharge pipe 20 to a heat exchanger 14 provided in a hot water supply tank 13; one side of the heat exchanger 14 is connected through a pipe 21 to a four-way valve 2; It is connected. A heat exchanger 12 is a first preheating means for hot water supply, and is connected to the four-way valve 2 and piping 22.

A solenoid valve 11 is connected in series with the heat exchanger 12, and is provided with a bypass pipe 23 that bypasses the series circuit of the heat exchanger bulb and the solenoid valve 11. The bypass circuit is composed of a bypass pipe 23, a solenoid valve 11, and a check valve 10. Reference numeral 15 denotes a cold storage heat tank, in which a user-side heat exchange device 16 is provided, and is connected to the four-way valve 2 through piping. Further, one end is connected to an expansion valve 17 which is a pressure reducing device through a pipe 25. 26.2
7 is a pipe that circulates and sends the cold storage thermal fluid to, for example, a fan coil unit. Reference numeral 18 denotes a heat source side heat exchanger, one of which is connected to the expansion valve 17 through a piping name, and the other side is connected to the electromagnetic valve 11 through a piping 29. 19 is a blower. (capital) is the water supply pipe, one side of which is connected to the above hot water tank 13
The other end is connected to a heat exchanger 12 which is a first preheating means. 31 is a faucet.

Next, the operation of this device will be explained. FIG. 3 shows a refrigerant flow path system diagram during heating operation. A portion of the high-temperature, high-pressure vapor refrigerant discharged from the compressor 1 is condensed in the heat exchanger 14 in the hot water supply tank 13, thereby warming the water in the hot water supply tank. The remaining vapor refrigerant passes through the four-way valve 2 and is condensed in the heat exchanger 16 provided in the cold storage heat tank 15, heating a heat medium such as water in the heat storage tank 15, and this heat medium is passed through the fan coil unit. (not shown) to heat the room. The liquefied refrigerant is depressurized through the expansion valve 7 and transferred to the heat source side heat exchanger 1.
8 pumps heat from the outside air to the blower 19 and evaporates it.
It passes through the check valve 10 and the four-way valve 2 and is sucked into the compressor.

At this time, the solenoid valve 11 is in a closed state, and the refrigerant does not flow to the hot water supply preheating heat exchanger 12. In such a configuration, by using a high pressure ratio expansion compressor as the compressor, the water temperature in the hot water tank can be maintained at about 40°C, and the fan coil can be used to maintain a temperature of 40°C.
In order to perform heating with Suita air of C, the water temperature in the heat storage tank 15 (when the medium is water) can be set to about 70°C. Next, FIG. 4 shows a refrigerant flow path system diagram during cooling operation. As in the heating operation, the high temperature, high pressure vapor refrigerant discharged from the compressor 1 is partially condensed in the heat exchanger 14 to warm the water in the hot water supply tank 17. The remaining vapor refrigerant passes through the switched four-way valve 2 and preheats the water supply in the hot water preheating heat exchanger 12. At this time, the solenoid valve 11 is opened.

If the vapor refrigerant is not completely liquefied in the hot water preheating heat exchanger and the high pressure of the refrigeration cycle increases too much, operate the heat source side heat exchanger fan 9 (or control the fan rotation speed) to radiate heat to the outside air. Liquefies the refrigerant. Next, the expansion valve 17
The depressurized refrigerant is evaporated in a heat exchanger 16 in the cold storage heat tank 15, and cools the heat medium (for example, water) in the tank 15. The cooled heat medium is guided to a fan coil unit (not shown) to cool the room. The evaporated refrigerant is sucked into the compressor 1 through the four-way valve 2. In this case as well, if a high pressure specific expansion compressor is used, the water temperature in the hot water tank can be reduced by °C.
The temperature of the heat medium (water temperature) in the cold storage heat tank 15 is set at approximately
It is possible to set the temperature to about 6°C.

Next, a second embodiment is shown in FIGS. 5, 6, and 7. FIG. 5 shows that in the configuration shown in FIG. 2, a heat exchanger blade is provided between the expansion valve 17 and the heat source side heat exchanger 18 to give heat to the refrigerant using solar heat, and a heat exchanger blade for heating the feed water is provided. A heat exchanger 39 as a second preheating means for preheating the supplied water using solar heat is provided in the inlet side passage. In the figure, 36 is a three-way valve for switching the flow path of a medium for solar heat utilization, and n is a medium pump.1. ．． 35ha collector. These are connected by pipes 40°41 and C243, respectively. Figure 6 explains the operation during heating operation, and by using the heat collected in the collector to give heat to the refrigerant through the heat exchanger described above, the coefficient of performance of the system is further improved. The driving range can be expanded.

At this time, the feed water preheating heat exchanger 39 is not used. Also,
FIG. 7 explains the operation during cooling operation, and by using the heat collected in the collector's house to preheat the feed water in the feed water preheating heat exchanger 39, the energy can be effectively used. At this time, no medium is allowed to flow through the heat exchanger blades for heating the refrigerant.

〔Effect of the invention〕

According to the present invention, the heat exchanger for hot water supply and the heat exchanger for heat storage during heating or the heat exchanger for heating water supply during cooling are arranged in series, so that the tank for hot water supply is always heated preferentially and stable. Hot water can be supplied. In addition, since the system is configured to perform heating and cooling using a cold storage tank, it is possible to use not only daytime power but also inexpensive nighttime power.

[Brief explanation of the drawing]

Figure 1 is an air-conditioning cycle diagram of the conventional technology, Figure 2 is a cycle diagram of the air-conditioning/heating water heater of the present invention, Figure 3 is a system diagram for heating, Figure 4 is a system diagram for cooling, and Figure 5 is for other systems. Figure 6 is a cycle diagram of the air-conditioning/heating and hot water supply system of the present invention, and Fig. 6 is a system diagram during heating.
FIG. 7 is a system diagram during cooling. l... Compressor, 2... Four-way valve, 13... Tank for hot water supply, 4... Heat exchanger for hot water supply, 15... Cold storage heat tank %16... Heat exchanger for cold storage heat , 17... expansion valve;
18...Heat source side heat exchanger, 19...Blower, 10.
... Check valve, 11 ... Solenoid valve, 12 ... Heat exchanger for heating water supply, A ... Heat exchanger using solar heat, 39 ° Heat exchanger for preheating water supply using solar heat, 35 ...・Collector, 3
6...Three-way valve, 37...Pump. Agent - Patent Attorney Tadashi Akimoto Figure 2 Figure 3 Figure 30 Figure 5 Figure 6 0

Claims (1)

[Claims] 1. In an air-conditioning cycle in which a compressor, a heat source side heat exchanger, a pressure reducing device, and a user side heat exchange device are connected in series via a four-way valve, between the compressor discharge side and the four-way valve. is equipped with a water heater that uses the entire amount of gas discharged from the compressor as a heating heat source,
A first preheating means for preheating water to be supplied to the hot water supply device is provided between the four-way valve and the heat source side heat exchanger, and a bypass circuit is provided for bypassing the first preheating means during heating. An air-conditioning, heating, and hot-water supply device characterized in that a user-side heat exchange device is provided between a pressure reducing device and a user-side heat exchange device. 2. The first preheating means is a heat exchanger that exchanges heat between the refrigerant gas that has passed through the water heater during cooling operation and the water in the water supply passage connected to the water supply port of the water heater. The air-conditioning, heating, and hot water supply equipment described in Scope 1. 3. The bypass circuit has a solenoid valve provided on the inlet side of the first preheating means that closes during heating operation, and a check valve that allows flow only during heating operation and is provided in parallel with the solenoid valve and the first preheating means. The air-conditioning, heating, and hot-water supply apparatus according to claim 1, which comprises green pipes. 4. The air conditioning/heating/water supply system according to claim 1, wherein the user-side heat exchange device is a heat storage tank, and the refrigerant passage is arranged in the heat storage tank in a heat exchange manner with the fluid in the heat storage tank. 5. In a heating and cooling cycle in which a compressor, a heat source side heat exchanger, a pressure reducing device, and a user side heat exchange device are connected in series via a four-way valve, the compressor discharge is connected between the compressor discharge side and the four-way valve. Install a water heater that uses all gas as a heating heat source,
A first preheating means for preheating water to be supplied to the hot water supply device is provided between the four-way valve and the heat source side heat exchanger, and a bypass circuit is provided for bypassing the first preheating means during heating. A user-side heat exchange device is installed between the pressure reducing device, a pump and a switching valve are connected to a solar heat collector, and the fluid heated by the collector is used as a heat source for heating or a second preheating heat source for hot water supply. An air-conditioning, heating, and water-heating device characterized by having means and means for doing so. 6. The air conditioning/heating/hot water supply according to claim 5, wherein the means for using the fluid heated by the collector as a heat source for heating is a refrigerant heat exchanger provided between the expansion valve and the heat source side heat exchanger. Device. 7. The heating and cooling system according to claim 5, wherein the means for using the fluid heated by the collector as a second preheating heat source of hot water supply water is a water-to-water heat exchanger provided in the water supply passage on the inlet side of the first preheating means. Water heater. 8. Claims in which the first preheating means is a heat exchanger that exchanges heat between the refrigerant gas that has passed through the water heater during cooling operation and the water in the water supply passage connected to the water supply port of the water heater. The air-conditioning, heating, and hot-water supply device according to item 5. 9. The bypass circuit has a solenoid valve provided on the inlet side of the first preheating means that closes during heating operation, and a check valve that allows flow only during heating operation and is provided in parallel with the solenoid valve and the first preheating means. The air-conditioning, heating, and hot water supply device according to claim 5, which comprises piping. 10. The air-conditioning/heating/water supply system according to claim 5, wherein the user-side heat exchange device is a heat storage tank, and the refrigerant passage is arranged in the heat storage tank in a heat exchange manner with the fluid in the heat storage tank. ′