JPH0410528Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat pump type air-conditioning/heating/water supply device.

[Prior art]

BACKGROUND ART An air conditioning/heating/hot water supply system is known in which a plurality of heat exchangers are selectively used by switching four-way switching valves to perform cooling, heating, hot water supply, etc.

In this type of air conditioning, heating, and hot water supply system, if a switching device such as a solenoid valve is installed between the compressor and the four-way switching valve, as described later, the operation of the four-way switching valve will be affected by the opening and closing of the switching device. However, there is a problem in that a problem occurs in switching the four-way switching valve.

Additionally, if a switching device is not provided between the compressor and the four-way switching valve, refrigerant will always flow through the four-way switching valve, reducing the amount of refrigerant flowing into the heat exchanger, resulting in a reduction in heat exchange capacity. be.

[Purpose of invention]

The purpose of the present invention is to
An object of the present invention is to provide a heat pump type air-conditioning/heating/hot-water supply system that can switch the flow path of a four-way switching valve.

[Structure of the idea]

According to the present invention, a compressor, a four-way switching valve connected to the outlet side of the compressor via a solenoid valve with a first valve, and one end connected to a second valve of the four-way switching valve. a first heat exchanger, a second heat exchanger having one end connected to the third valve of the four-way switching valve, and a third heat exchanger having one end connected to the outlet side of the compressor. The inlet side of the compressor is connected to the fourth valve of the four-way switching valve, and the other end of the third heat exchanger is connected to the first and second heat exchangers via an expansion valve. In the heat pump type air-conditioning/heating/water supply device, the other end of a capillary reach tube, one end of which is connected to the pilot valve of the four-way switching valve, is connected between the compressor and the solenoid valve. A heat pump type air-conditioning/heating/water heating device is obtained.

[Example of idea]

The present invention will be described below based on embodiments shown in the drawings.

First, referring to FIG. 1, the heat pump type air conditioning/heating/water supply system according to the present invention will be explained. A first valve 5a of a four-way switching valve 5 is connected to the other end via a solenoid valve 4. An outdoor heat exchanger 6 is connected to the second valve 5b of the four-way switching valve 5, and an indoor heat exchanger 7 is connected to the third valve 5c of the four-way switching valve 5.

The outdoor heat exchanger 6 and the indoor heat exchanger 7 are connected by a pair of check valves 8a and 8b connected in series, and further connected by a pair of check valves 9a connected in series.
and 9b. That is, the check valves 8a and 8b and the check valves 9a and 9b are connected in parallel.

As shown in the figure, the expansion valve 1 is connected between the check valves 8a and 8b and between the check valves 9a and 9b.
0 is connected, and the hot water supply heat exchanger 3 is connected to the check valves 9a, 9b and the expansion valve 10 via the check valve 9c.
connected to the connection point. In addition, the four-way switching valve 5
The fourth valve 5d is connected to the inlet side of the compressor 1.

Next, the operation of this air conditioning, heating, and hot water supply system will be described with reference to FIGS. 2a to 2d.

When cooling, as shown in Figure 2a,
The solenoid valve 4 is operated to open the valve, and the first valve 5a and the second valve 5b of the four-way switching valve 5 are connected, and the third valve 5c and the fourth valve 5d are connected.

The refrigerant flowing out of the compressor 1 is transferred to the solenoid valve 4, the first valve 5a and the second valve 5b of the four-way switching valve 5, the outdoor heat exchanger 6, the check valve 9b, the expansion valve 10, the check valve 8a, and the indoor The heat exchanger 7, the third valve 5c of the four-way switching valve 5, the fourth valve 5d, and the compressor 1 are circulated in this order. Therefore,
In this case, the indoor heat exchanger 7 can cool the room.

When performing heating, as shown in Figure 2b,
Operate the solenoid valve 4 to open the valve and open the four-way switching valve 5.
The first valve 5a and the third valve 5c are connected, and the second valve 5b and the fourth valve 5d are connected.

The refrigerant flowing out of the compressor 1 is transferred to the solenoid valve 4, the first valve 5a and the third valve 5c of the four-way switching valve 5, the indoor heat exchanger 7, the check valve 9a, the expansion valve 10, the check valve 8b,
outdoor heat exchanger 6, second valve 5b of four-way switching valve 5,
It circulates in the order of the fourth valve 5d and the compressor 1. Therefore, in this case, the indoor heat exchanger 7 can perform indoor heating.

When supplying hot water, as shown in Figure 2c,
The solenoid valve 2 is operated to open the valve and connect the second valve 5b and the fourth valve 5d of the four-way switching valve.

The refrigerant flowing out from the compressor 1 is passed through a solenoid valve 2, a hot water heat exchanger 3, a check valve 9c, an expansion valve 10, and a check valve 8.
b, the second of the four-way switching valve 5 through the outdoor heat exchanger 6;
The valve 5b is reached. The refrigerant then returns to the compressor 1 from the fourth valve 5d of the four-way switching valve 5.

The hot water supply heat exchanger 3 is connected to a hot water storage tank (not shown), and hot water is stored in the hot water storage tank by the hot water supply heat exchanger 3, and this hot water is used in the bathroom, kitchen, etc.

When supplying hot water and cooling, the electromagnetic valve 2 is operated to open the valve, and the third valve 5c and fourth valve 5d of the four-way switching valve 5 are connected, as shown in FIG. 2d.

The refrigerant coming out of the compressor 1 is passed through a solenoid valve 2, a hot water supply heat exchanger 3, a check valve 9c, an expansion valve 10, and a check valve 8.
a, indoor heat exchanger 7, third valve 5 of four-way switching valve 5
c, returns to the compressor 1 through the fourth valve 5d. Therefore, the hot water supply heat exchanger 3 stores hot water in the hot water tank, and the indoor heat exchanger 7 cools the room.

Here, the four-way switching valve will be explained with reference to FIG.

The four-way switching valve 5 is connected to the first port 5 as shown in the figure.
a, second port 5b, third port 5c, fourth port
It has a cylindrical body 51 provided with a port 5d, and a sliding valve 52 constituted by a pair of disc-shaped valves and a valve having a U-shaped cross section connected to these disc-shaped valves. There is. Capillary reach tubes 11 are attached near both ends of the cylindrical body 51, and the capillary reach tubes 11 inject gas into both ends of the cylindrical body 51 to create a pressure difference. This pressure difference causes the slide valve 52 to move leftward or rightward, thereby connecting each port as described above.

However, as shown in FIG. 4, in the conventional air-conditioning/heating/hot-water supply system, gas is injected into both ends of the four-way switching valve 5 to create a pressure difference.
When moving the four-way switching valve 5, a capillary reach tube 11 for sending gas to both ends of the four-way switching valve 5 is attached to the lower end of the solenoid valve 4 via a pilot valve 12 for opening and closing gas flow.

Therefore, when the solenoid valve 4 is closed, the port of the four-way switching valve 5 cannot be switched, and in order to switch the port of the four-way switching valve 5, the solenoid valve 4 is opened and the port of the four-way switching valve 5 is switched. After switching, the solenoid valve 4 must be closed.

In the present invention, one end of the capillary reach tube 11 is attached to the upper part of the solenoid valve 4, as shown in FIG. That is, one end of a capillary reach tube 11 is attached between the compressor 1 and the solenoid valve 4.

Therefore, the ports of the four-way switching valve 5 can be switched regardless of whether the solenoid valve 4 is opened or closed.

[Effect of idea]

As explained above, according to the present invention, it is possible to change the flow path by switching the ports of the four-way switching valve, regardless of the opening/closing device such as a solenoid valve installed between the compressor and the four-way switching valve. It has the advantage of being possible.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the configuration of the air conditioning/heating/hot water supply system according to the present invention, Figs. 2 a to d are views showing the flow path of the refrigerant chamber in the air conditioning/heating/water heating system according to the invention, and Fig. 3 is a four-way switching valve. A diagram to show the structure of,
FIG. 4 is a diagram showing the connection of a conventional four-way switching valve, and FIG. 5 is a diagram showing the connection of the four-way switching valve according to the present invention. 1... Compressor, 2, 4... Solenoid valve, 3... Heat exchanger for hot water supply, 5... Four-way switching valve, 6... Outdoor heat exchanger, 7... Indoor heat exchanger, 8, 9... …non-return valve,
10...Expansion valve, 11...Capillary reach tube, 12...Pilot valve.

Claims (1)

[Scope of utility model registration request] a compressor, a four-way switching valve connected to the outlet side of the compressor via a solenoid valve with a first valve, and a first heat exchanger having one end connected to a second valve of the four-way switching valve. a second heat exchanger having one end connected to the third valve of the four-way switching valve; and a third heat exchanger having one end connected to the outlet side of the compressor; The inlet side of the machine is connected to the fourth valve of the four-way switching valve, and the other end of the third heat exchanger is connected to the other ends of the first and second heat exchangers via an expansion valve. In the heat pump type air-conditioning/water heating system,
A heat pump type air-conditioning/heating device characterized in that a capillary reach tube whose one end is connected to a pilot valve for controlling the four-way switching valve and the other end of the capillary reach tube is connected between the compressor and the solenoid valve. Water heater.