JPH01200164A - Air conditioner - Google Patents

Abstract

PURPOSE:To eliminate a trend of making a large sized heat exchanger for a floor heating and prevent a hot water temperature from being increased to add a heating operation of an air conditioner and to improve a comfortable feeling by a method wherein the hot water after floor heating is supplied to a heat exchanger for a part not utilizing a heat source for water and a heat pump type heating operation is carried out with an air conditioner. CONSTITUTION:Hot water after a floor heating is carried out by a heat exchanger for a floor heating is decreased in its temperature by about 5 to 10 deg.C, resulting in providing the most efficient water temperature for a case in which the air conditioner is operated. This hot water flows to a heat exchanger 10 for a non-utilizing part of a heat source for water, its heat exchanging operation is carried out in the heat exchanger for the floor heating and a heat pump heating operation is carried out through the air conditioner with the fed-out hot water being applied as a source of heat. Thus, it is not necessary to make a large-sized heat exchanger for a floor heating and to increase a hot water temperature in order to improve a comfortable feeling during a heating operation and in addition it is also possible to add a heating operation through the air conditioner as well as to improve a comfortable feeling.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a heat exchanger for floor heating, and an air conditioner that performs heat pump heating using hot water sent from the heat exchanger for floor heating as a heat source. This relates to an air conditioning system equipped with ◎ [Prior technology] tl! Figure J3 is a schematic diagram of a conventional general floor heating system using hot water. A heat exchanger for floor heating uses hot water to perform floor heating. Usually, a plurality of heat exchangers are installed. (3
) is the circulating water pump, and (4) is the hot water piping.

Next, we will explain the operation.◎The hot water produced by the hot water production device (1) such as a boiler is transferred to the circulating water pump (3).
Water is supplied to the hot water pipe (4)K. The above hot water piping (4
) is connected to the floor heating heat exchanger (2), and as hot water flows through this floor heating heat exchanger (2),
Underfloor heating is provided.

[Problem to be solved by the invention]

Conventional floor heating systems that use hot water are configured as described above.If you try to heat the room with just a floor heating system, you will need a heat exchanger for floor heating (floor heating panels) during extremely cold weather, especially in cold regions. There were problems such as increasing the size of the heating system and raising the temperature of the hot water, which took up a lot of floor space.

This invention was made to solve the above-mentioned problems, and aims to provide an air conditioning system that can provide comfortable heating even if the floor space is small and does not require excessive rise in floor temperature. Objective @ [Means for Solving the Problems] The air conditioning system according to the present invention provides hot water that is supplied to a heat exchanger for floor heating to perform floor heating, and then is sent out from the heat exchanger for floor heating. [Function] The air conditioning system of the present invention improves the comfort of floor heating by supplying water to the heat exchanger on the side where the water heat source is not used, thereby allowing the air conditioner to perform heat pump heating operation. As a means, the used hot water sent out from the heat exchanger for floor heating is supplied to the heat exchanger on the side where the water heat source is not used, and the heat pump heating operation is performed by the air conditioner using this hot water as the heat source.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a diagram of an air conditioning system according to an embodiment of the present invention, and Figure 2 is a refrigerant circuit diagram of an air conditioner that constitutes the air conditioning system shown in Figure 1. In these figures, (8
) is the compressor, α9 is the four-way switching valve, (9) is the accumulator, GO is the heat exchanger on the side not using the water heat source, αυ is the heating capillary tube as a throttling device, ■ is the check valve, (to) is the pulp ,α
4 is a refrigerant pipe, and these are stored in a cabinet.
It constitutes a heat exchange unit (5) on the side where the water heat source is not used.

In addition, (to) is a heat exchanger on the user side, (to) is a cooling capillary tube as a throttling device, αη is a check valve, and before the above heat exchanger on the user side (to) is a blower device (to). ) is attached to form the user-side heat exchange unit (6). The user-side heat exchange unit (6) is installed in a ceiling cassette type, ceiling-mounted type, etc., and the water heat source non-use side heat exchange unit (5)
The heat exchange unit (6) on the user side constitutes a refrigerant circuit with connecting piping (7) @ The above air conditioner includes a hot water production device (1) such as a boiler, a heat exchanger for floor heating, etc. as shown in Figure 1. (2), connected to a floor heating system composed of a circulating water pump (3), and water piping (4).In addition, during cooling operation, the air conditioner is connected to a switching pulp l■, switching pulp 2@, The water circuit is switched by operating the switching pulp 3 (c), and the cold water from the cooling tower (2) is supplied by the circulation pump j to the heat exchanger αa on the side where the water heat source is not used.

Next, the effect will be explained.

After performing floor heating with the floor heating heat exchanger (2),
The used hot water that returns to the hot water production equipment (1) should be about 5 to 10"C lower than the water temperature at the inlet of the floor heating heat exchanger (2), and 30"C if the inlet is 40°C hot water. -35°C is the most efficient water temperature when operating an air conditioner. This used hot water is transferred to the heat exchanger αG on the non-use side of the water heat source.
The heat pump heating operation is performed by the air conditioner using the hot water exchanged and sent out in the multi-floor heating heat exchanger (2) as a heat source. Next, the compressor (8) operates the heating operation in the air conditioner, and the high-temperature, high-pressure refrigerant gas passes through the four-way switching valve α9 and is transferred to the user-side heat exchanger (to) of the user-side heat exchange unit (6). It is condensed by warming the room air temperature, is condensed by the heating capillary tube 0 of the water heat source non-use side heat exchange unit (5), expands adiabatically, and evaporates in the water heat source non-use side heat exchanger αO. The user-side heat exchange unit (6) may be of the ceiling-mounted cassette type or ceiling-mounted type.The indoor air warmed by the user-side heat exchanger αG is blown into the room through the ceiling surface by the blower device (8). .

Also, during cooling, the switching pulp 1 of the water circuit is opened, the switching pulp 2@ is closed, and the switching pulp 3f24 is connected to the hot water production device! Switching is made so that water flows from the (1) side to the cooling tower @ side, forming a water circuit that cools the heat exchanger αG on the side where the water heat source is not used. At this time, during cooling operation in the air conditioner, the compressor (8) operates, and high temperature and high pressure refrigerant gas is passed through the four-way switching valve α9 to the water heat source non-use side heat exchanger (
1 (I), this water heat source is supplied to the non-utilization side heat exchanger αG, where it absorbs heat and condenses into a liquid refrigerant.
6) The indoor air expands adiabatically in the cooling capillary ω, evaporates in the user-side heat exchanger (to), and cools the indoor air.The indoor air is sent into the room by the blower and operated for cooling. Become.

〔Effect of the invention〕

As described above, in the air conditioning system according to the present invention, hot water is supplied to the floor heating heat exchanger and after performing floor heating, the hot water sent out from the floor heating heat exchanger is transferred to the heat exchanger on the non-use side of the water heat source. Since the structure is configured so that the heat pump heating operation is performed by the air conditioner by supplying water to It is possible to add a heating operation by adding a heating operation, and it is possible to improve comfort.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an air conditioning system showing an embodiment of the present invention, Fig. 2 is a refrigerant circuit diagram of an air conditioner incorporated in the air conditioning system shown in Fig. 1, and Fig. 3 is a conventional floor heating system. FIG. 2 is a schematic diagram of the system. In these figures, (2) is a heat exchanger for floor heating, (8
) is the compressor, α9 is the switching valve, (to) is the user side heat exchanger,
αG is the heat exchanger on the side not using the water heat source, and aV@ is the diaphragm device. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] Equipped with a heat exchanger for floor heating that performs floor heating by supplying hot water, it is composed of a compressor, a switching valve, a heat exchanger on the user side, a heat exchanger on the side that does not use the water heat source, and a throttling device. An air conditioner having a refrigerant circuit is provided, and after being supplied to the floor heating heat exchanger to perform floor heating, hot water sent from the floor heating heat exchanger is supplied to the water heat source non-use side heat exchanger. An air conditioning system characterized in that the above-mentioned air conditioner performs a heat pump heating operation.