JPH0289966A - Heat pump-based hot water-supplying air conditioner - Google Patents

Abstract

PURPOSE:To simplify the circulating system so as to achieve a reduction in cost and facilitate attaching a hot water-supplying unit to an outdoor unit by introducing a high pressure priority valve by which the outlet of a hot water-supplying heat exchanger is joined to a pressure- reducing device on the side of an outdoor heat exchanger or on the side of an indoor heat exchanger. CONSTITUTION:In a hot water-supplying cooling mode, the refrigerant flowing into a hot water-supplying heat exchanger 4 undergoes heat exchange with water, turning it to hot water, whereas the refrigerant condenses into a high pressure liquid and flows into a high pressure priority valve 9. A flow of refrigerant caused by a differential pressure between an outdoor line 10 and an indoor line 11 on the two respective sides of an expansion valve makes the valve element 9b in the high pressure priority valve 9 instantaneously press against a valve seat 9c on the indoor side. As a result, the refrigerant entering the high pressure priority valve 9 joins liquefied refrigerant flowing out of an outdoor heat exchanger 3 under high pressure, passes through the expansion valve 5, flows into an indoor heat exchanger 7 where it turns to a low pressure gas by evaporation, and then passing through a four-way valve 2, flows into a compressor 1 through the suction inlet. In a hot water-supplying heating mode, the flow of the refrigerant changes in direction with the outdoor heat exchanger 3 functioning as an evaporator, as directed by the four-way valve 2, but the high pressure priority valve 9 acts in the same manner as in cooling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a flow path switching valve for a heat pump hot water supply air conditioner.

[Conventional technology]

FIG. 5 shows a refrigerant circuit of a heat pump hot water supply air conditioner using a conventional flow path switching valve, as disclosed in, for example, Japanese Patent Application Laid-Open No. 48-58427. In the figure, (1) is the compressor, and (2) is the cooling operation.

(3) is an outdoor heat exchanger that exchanges heat between the refrigerant and the outside air; (4) is a hot water supply heat exchanger that exchanges heat between the refrigerant and water to create thirst; (5) is a four-way valve that switches heating operation. ) is an expansion valve,
(6) is a check valve bridge that combines four check valves.
(7) is an indoor heat exchanger, (81 is a solenoid valve that shuts off the air conditioning circuit during hot water supply operation, and (12) is a capillary tube that is connected to the inlet and outlet of the expansion valve to balance high and low pressure when stopped.

Next, the operation will be explained. Figure 5 shows the cooling/heating mode, in which the refrigerant compressed by step 11 into a high-temperature, high-pressure gas is branched into a hot water supply heat exchanger (4) and a four-way valve (2). The refrigerants are condensed in the hot water supply heat exchanger (4) and the outdoor heat exchanger (3), merge at the inlet of the expansion valve (5), pass through the expansion valve (5), and enter the outdoor heat exchanger (7). It evaporates, passes through the four-way valve (2), and is transferred to the compressor (1).
) returns to the suction tube. In the above operation, at the confluence point of the refrigerant from the outdoor or indoor heat exchanger +31 +71 and the refrigerant from the supply 14 heat exchanger (4), even if the flow of refrigerant in the air conditioning circuit is reversed between cooling operation and heating operation. , High-pressure refrigerant always flows from the hot water supply heat exchanger Wj+41.

Since it is necessary to connect to the high pressure side of the expansion valve (5), the expansion valve (5) and check valve bridge (6) are combined to ensure that the refrigerant flow direction of the expansion valve (5) is always in one direction. The refrigerant from the hot water supply heat exchanger (4) joins the inlet side of the expansion valve (5) to form a cycle RS configuration.

[Problem to be solved by the invention]

The expansion valve part of a conventional heat pump water heater air conditioner.

Because of the structure described above, reversible I! is currently the mainstream. ! ! It is more complex than an air conditioner using a tension valve, which has a simple circuit configuration, and is significantly inferior in both cost +- and AT performance. Also, it was impossible to provide a hot water unit as an option for an air conditioner. In addition, a capillary tube was required to balance the high and low pressures in the refrigerant circuit during shutdown.

This invention was made to solve the above-mentioned problems, and by simplifying the two-circuit configuration, it is possible to reduce the cost of the product and also to simplify the installation of the hot water knit to the conventional outdoor unit. The object of the present invention is to obtain a device that can provide a hot water supply unit as an option for an outdoor unit.

[Means for Solving RAM] A heat pump hot water/air conditioner according to the present invention includes an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger, and a pressure reduction value a, and an indoor heat exchanger connected to the outdoor unit. An indoor unit consisting of a water heater, a hot water unit connected to the outdoor unit and consisting of a heat exchanger for supplying oil, and a connecting portion between this hot water supply unit and the outdoor unit were provided. During hot water supply/cooling, the outlet of the hot water supply heat exchanger is communicated with the outdoor heat exchanger side of the pressure reducing device, and during hot water supply/hot water heating, the outlet of the hot water supply heat exchanger is communicated with the indoor heat exchanger side of the pressure reducing device. It is equipped with a high-pressure priority valve that communicates with the

[For production]

In this invention. The heat pump type water heater air conditioner is
The use of a high-pressure priority valve simplifies the circuit configuration and reduces costs, and also simplifies the installation of the outdoor unit's hot water supply unit.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (1) to (51) and [7] to (8) are completely the same as the above-mentioned conventional device. (9) is a high-pressure priority valve that connects the pipe coming out of the hot water supply heat exchanger (4) to the air [1 refrigerant circuit].

(21) is an indoor unit consisting of an indoor heat exchanger (7).

(22) is an outdoor unit having a compression 1 (11), a four-way valve (2), an outdoor heat exchanger (3), and an expansion valve (5) which is a pressure reducing device.

(23) is a hot water supply unit consisting of a hot water heat exchanger.

Moreover, the inside of the high pressure priority valve (9) has two valve seats (9e) facing the inside of the housing (9a) as shown in FIG.
) and (9d), a valve body (9b) is housed between the valve seat (9C) and (9d), and a housing (9a)
A pipe (9e) is attached to the side surface of the valve at an intermediate position between the valve seats (9C) and (9d). Furthermore, the valve seat (9d),
(9e) has a valve seat (9d) and (9c) as shown in Figure 4.
) is provided with a fine groove (9F).

Next, the operation will be explained. Figure 1 shows the hot water supply cooling operation mode, where the refrigerant compressed by the compressor (1) and turned into high temperature, high pressure gas is transferred to the four-way valve (2) and the hot water supply heat exchanger (4).
The refrigerant that flows into the refrigerant and passes through the four-way valve (2) is condensed by the outdoor heat exchanger (3). Furthermore, the refrigerant that has flowed into the hot water heat exchanger (4) exchanges heat with water, turns the water into hot water, and condenses, and the refrigerant that has become a high-pressure liquid enters the high-pressure priority valve (9). The valve body (9b) in the high-pressure priority valve (9) is instantly pressed against the indoor valve seat (9C) by the flow of refrigerant due to the differential pressure between the expansion valve outdoor pipe 0 and the indoor pipe (11).

Due to the above-described operation of the high-pressure priority valve (9), the refrigerant that has entered the high-pressure priority valve (9) merges with the high-pressure liquid refrigerant from the outdoor heat exchanger (3).

It passes through the expansion valve (5), flows into the indoor heat exchanger (7), evaporates, becomes a low-pressure gas, passes through the four-way valve (2), and flows into the suction port of the compressor (1).

In hot water heating operation mode, the four-way valve (2
), the flow direction of the refrigerant is switched, the indoor heat exchanger (7) becomes a condensing type, and the outdoor heat exchanger (3) becomes a evaporator, but the high-pressure one-vehicle valve (9) changes during cooling operation. works similarly to
High pressure liquid from the hot water supply heat exchanger (4) is guided to the high pressure side of the expansion valve (51).

In the above hot water supply cooling and hot water supply heating operation modes, the T1 magnetic valve (
8) is open.

Next, the hot water supply operation mode will be explained. FIG. 2 shows the hot water supply operation mode and the hot water supply heating operation mode. The refrigerant compressed by the compressor (1) and turned into high-temperature, high-pressure gas flows into the four-way valve (2) and the hot water heat exchanger (4), but is it four-way?
The solenoid valve (8) installed in the outlet pipe (2) operates during hot water supply operation and closes the pipe, allowing the refrigerant to flow only into the hot water heat exchanger (4), allowing hot water heat exchange! The refrigerant is condensed into a high-pressure liquid by +41.

It flows into the high pressure priority valve (9). Pressure inside the outdoor pipe αα of the high pressure priority valve (9)! 81 The pressure is low due to suction by (1), and the indoor pipe of the high pressure priority valve (9) (
11) Inside.

? ! : Tilt, e 181 is closed, and the differential pressure causes the valve body (9b) in the high pressure priority valve (9) to close.
is sucked into the outdoor heat exchanger side valve seat (9d). Due to the above operation of the high pressure priority valve (9), the refrigerant that has flowed into the high pressure priority valve (9) flows into the indoor heat exchanger side piping (11) of the No. The pressure inside the pipe (11) is increased, the operation of the high pressure priority valve (9) is stabilized, and the gas flows through the expansion GI valve (5) into the outdoor heat exchanger (3), evaporates, becomes low pressure gas, and is distributed in all directions. It passes through the valve (2) and flows into the inlet of the compressor (1).

In addition, in conventional refrigerant circuits, capillary tubes (12) as shown in Figure 5 are used before and after the expansion valve in order to balance the high pressure side and the low pressure side when the operation is stopped, but the high pressure priority valve (9) By providing the valve seats (9c) and (9d) with fine grooves (9F) as shown in FIG. 4, the same effect as that of the capillary duplex (12) can be achieved.

Since the solenoid valve (8) is provided on the connecting pipe between the outdoor unit and the indoor unit, it can be attached to the outdoor unit without any modification.

〔Effect of the invention〕

According to this invention, there is provided an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger, and a pressure reducing device; A hot water supply unit consisting of a heat exchanger is provided at the connection between the hot water supply unit and the outdoor unit, and the outlet of the hot water supply heat exchanger is communicated with the outdoor heat exchanger side of the pressure reduction device during hot water supply and cooling. Since the configuration is equipped with a high-pressure priority valve that communicates the outlet of the heat exchanger for hot water supply with the indoor heat exchanger side of the pressure reducing device during hot water supply and heating, the configuration of the refrigerant circuit is simple and cost reduction can be achieved. At the same time, it has the effect of simplifying the installation of the hot water supply unit to the outdoor unit.

[Brief explanation of drawings]

FIG. 1 is a refrigerant circuit diagram showing a hot water supply cooling mode according to example #i of the present invention, FIG. 2 is a refrigerant circuit diagram showing hot water supply heating and hot water supply modes, and FIG. 3 is a cross-sectional side view of a high pressure priority valve. FIG. 4 shows a detailed view of the same component, and FIG. 5 shows a refrigerant circuit diagram of the conventional hot water supply room F[. In the figure, (1) is the pressure 0181. (2+ is a four-way valve, (
3) is a room heat exchanger, (4) is a hot water supply heat exchanger, and (5) is a heat exchanger for hot water supply.
is an expansion valve (pressure reducing device f), (9) is a high pressure priority valve, (2
1) l is the indoor unit, (22) is the outdoor unit I-,
(23)! It's a hot water supply unit. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger, and a pressure reducing device; an indoor unit connected to the outdoor unit and consisting of an indoor heat exchanger; a hot water supply unit connected to the outdoor unit and consisting of a hot water supply heat exchanger; The outlet of the hot water supply heat exchanger is provided at the connection part between the hot water supply unit and the outdoor unit, and the outlet of the hot water supply heat exchanger is connected to the outdoor heat exchanger side of the pressure reducing device during hot water supply/cooling, and the hot water supply heat exchanger is provided during hot water supply/hot water supply/heating. A heat pump type hot water supply air conditioner equipped with a high pressure priority valve that connects an outlet of the container to the indoor heat exchanger side of the pressure reducing device.