JPH0356865Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a heat pump circuit having cooling, heating, and hot water supply functions.

(Prior Art) Various conventional heat pump circuits are known, but there is room for improvement in terms of quick response to a new operation mode at the time of mode switching.

(Problems to be Solved by the Invention) The present invention aims to solve the above-mentioned conventional problems and provide a heat pump circuit with smooth mode switching.

(Example) The heat pump circuit of the present invention will be described below according to an example shown in the drawings.

FIG. 1 shows a circuit according to the present invention, which has a drive path a connecting two of the four ports of a four-way valve 3 and having a compressor 1 and an accumulator 2 installed therein.

Further, one end of the outdoor unit path b is connected to the other port of the four-way valve 3, and the on-off valve 4, the outdoor unit 5, the expansion valve 6, and the on-off valve 8 are attached to the outdoor unit path b. .

Next, a check valve 7 is connected in parallel to the series circuit of the expansion valve 6 and the on-off valve 8.

Further, one end of the hot water supply heating path c and one end of the indoor unit path d are connected to the other port of the four-way valve 3.

An on-off valve 18, a hot water heater 17, and a check valve 15 are installed in the hot water heating path c.

Next, the indoor unit path d includes an on-off valve 13 and an indoor unit 1
2 and an expansion valve 9 are installed, and a check valve 11 is connected in parallel to the expansion valve 9.

Further, the other end of the hot water supply heating path c and the other end of the indoor device path d are connected to the other end of the outdoor device path b.

On the other hand, a bypass path p1 is provided that connects the port of the four-way valve 3 to which the outdoor unit path b is connected and the hot water heater 17 of the hot water heating path c.

An on-off valve 21 is attached to the bypass path p1.

Furthermore, a bypass path p2 is provided that connects the port of the four-way valve 3 to which the hot water supply heating path c is connected and the outdoor unit 5 of the outdoor unit path b.

An on-off valve 24 is attached to the bypass path p2.

The operation of the heat pump circuit of the present invention shown in the above embodiments will be explained next.

Here, the heat pump circuit can be used for heating, hot water supply (winter), heating and hot water supply, cooling, hot water supply (summer), and cooling and hot water supply, and each will be explained below.

First, when using it for heating, open the on-off valves 4, 8, and 13 as shown in Figure 1, and open the on-off valves 18 and 13.
Close 21 and 24.

In this state, the four-way valve 3 is switched as shown in the figure to drive the compressor 1.

Thereby, the refrigerant pressurized and liquefied in the compressor 1 releases heat in the indoor unit 12.

Further, the refrigerant passes through the expansion valve 6, is vaporized under reduced pressure, and absorbs heat in the outdoor unit 5.

Heating will be performed through the above cycle.

Next, when used for hot water supply (in winter), the on-off valves 4, 8, and 18 are opened and the on-off valves 13, 21, and 24 are closed, as shown in FIG.

In this state, the four-way valve 3 is switched as shown in the figure to drive the compressor 1.

As a result, the refrigerant pressurized and liquefied in the compressor 1 releases heat in the hot water heater 17 to heat the water supply.

Further, the refrigerant passes through the expansion valve 6, is vaporized under reduced pressure, and absorbs heat in the outdoor unit 5.

Hot water is supplied (in winter) through the above cycle.

Next, regarding the case where it is used for both heating and hot water supply, see the third section.
As shown in the figure, the on-off valves 4, 8, 13, and 18 are opened and the on-off valves 21 and 24 are closed.

In this state, the four-way valve 3 is switched as shown in the figure to drive the compressor 1.

Thereby, the refrigerant pressurized and liquefied in the compressor 1 releases heat in both the indoor unit 12 and the hot water heater 17.

Further, the refrigerant passes through the expansion valve 6, is vaporized under reduced pressure, and absorbs heat in the outdoor unit 5.

Heating and hot water supply are performed through the above cycle.

Next, when using it for cooling, open the on-off valves 4 and 13 and open the on-off valves 8 and 18, as shown in FIG.
Close 21 and 24.

In this state, the four-way valve 3 is switched as shown in the figure to drive the compressor 1.

Thereby, the refrigerant pressurized and liquefied in the compressor 1 releases heat in the outdoor unit 5.

Furthermore, the refrigerant passes through the expansion valve 9, is vaporized under reduced pressure, and absorbs heat in the indoor unit 12.

Cooling is performed through the above cycle.

Next, when used for hot water supply (summer season), the on-off valves 8, 21, and 24 are opened and the on-off valves 4, 13, and 18 are closed, as shown in FIG.

In this state, the four-way valve 3 is switched as shown in the figure to drive the compressor 1.

As a result, the refrigerant pressurized and liquefied in the compressor 1 releases heat in the hot water heater 17.

Further, the refrigerant passes through the expansion valve 6, is vaporized under reduced pressure, and absorbs heat in the outdoor unit 5.

Hot water is supplied (in summer) through the above cycle.

Next, for cooling and hot water supply, open the on-off valves 13 and 21 and open the on-off valves 4, 8, and 1 as shown in Figure 6.
Close 8,24.

In this state, the four-way valve 3 is switched as shown in the figure to drive the compressor 1.

As a result, the refrigerant pressurized and liquefied in the compressor 1 releases heat in the hot water heater 17.

Furthermore, the refrigerant passes through the expansion valve 9, is vaporized under reduced pressure, and absorbs heat in the indoor unit 12.

Through the above cycle, both cooling and hot water supply are performed.

As is clear from the above explanation, heating and hot water supply (in winter)
It is understood that the switching position of the four-way valve 3 for the three usage modes of heating and hot water supply is the same.

In other words, switching between these three usage modes is extremely smooth.

Similarly, air conditioning, hot water supply (summer), and cooling and hot water supply.
The usage of seeds is also common.

(Effects of the invention) The embodiments of the heat pump circuit of the invention are as described above, and the effects thereof are listed below.

(1) The heat pump circuit of the present invention has the configuration described in the claims for utility model registration, and in particular, since it has two bypass paths, fewer switching operations of the four-way valve are required, and as a result, mode switching is smooth.

(2) The heat pump circuit of the present invention has the same configuration as above, and is extremely simple in that only two bypass paths are added.

[Brief explanation of the drawing]

FIG. 1 is a heat pump circuit diagram of the present invention, and FIGS. 2 to 6 are usage state diagrams of the same heat pump circuit. 1... Compressor, 2... Accumulator, 3... Four-way valve, 4... On-off valve, 5... Outdoor unit, 6... Expansion valve, 7... Check valve, 8... On-off valve, 9...Expansion valve, 11...Check valve, 12...Indoor unit, 13...Opening/closing valve, 15...Check valve, 17...
...Hot water heater, 18...On-off valve, 21...On-off valve, a...Drive path, b...Outdoor unit path, c...Hot water heater, d...Indoor unit path, p1, p2...Bypass Road.

Claims (1)

[Scope of utility model registration request] a drive path connecting two of the four ports of the four-way valve and equipped with a compressor;
An outdoor equipment line, one end of which is connected to the other port of the two-way valve, and is equipped with an on-off valve, an outdoor unit, an expansion valve, and an on-off valve, and an inverter that is connected in parallel to the series circuit of the expansion valve and on-off valve. a stop valve, a hot water heating path having one end connected to the other port of the four-way valve and the other end connected to the other end of the outdoor unit path, and equipped with an on-off valve, a hot water heater, and a check valve; , an indoor unit path connected in parallel to the hot water supply heating path and equipped with an on-off valve, an indoor unit, and an expansion valve; a check valve connected in parallel to the expansion valve of the indoor unit path; and the outdoor unit path. a bypass passage connected to the port of the four-way valve connected to the hot water heater of the hot water supply heating path and equipped with an on-off valve; A heat pump circuit that connects an outdoor unit and consists of another bypass path equipped with an on-off valve.