JPS6053759A - Heat pump hot-water supply air conditioner - 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] Industrial Field of Application The present invention relates to a hot water heating/cooling machine that applies a heat pump, and uses Il' and Ir to supply hot water using exhaust heat during cooling, and to improve startup characteristics and defrosting characteristics during heating. It relates to multifunctional items that have functions.

Conventional configurations and their problems Heat pump hot water heating/cooling systems have been proposed in the past, but when using exhaust heat during cooling to supply hot water, it is necessary to heat the hot water while maintaining cooling capacity, so a hot water heat exchanger is used. This method uses a method of increasing A-line heat [soup] by increasing the amount of water and increasing the amount of circulating water, but it is necessary to satisfy the cooling capacity and to obtain hot water at the required high temperature at the same time. was the worst.

Purpose of the Invention The present invention solves the above-mentioned conventional problems, and provides a heat pump that can obtain high-temperature hot water in normal hot water heating and use waste heat to heat hot water without reducing the cooling capacity during cooling. Intended for hot water heating and cooling systems.

Structure of the Invention In order to achieve this object, a heat bomb cycle is constructed having an outdoor heat exchanger, an indoor heat exchanger, and a hot water heat exchanger, and furthermore, the hot water heat exchanger is used for high-temperature heating and medium-temperature heating. The two are divided and connected in series via a three-way flow control valve, and the other end of the three-way flow control valve and the outlet of the hot water heat exchanger for high-temperature heating are connected to a medium temperature region in the lower middle part of the hot water storage tank and a high temperature region in the upper part of the hot water storage tank, respectively. A water circulation path is formed from the bottom of the hot water storage tank via a variable capacity circulation pump, and when hot water is heated using exhaust heat while cooling in the summer, the three-way flow rate control valve is connected to the middle temperature range connection side of the hot water storage tank. The system is configured such that the water is closed and two hot water heat exchangers serve as condensers to heat water to a constant temperature and flow into the high temperature region.

Description of examples An embodiment of the present invention will be described below with reference to the drawings.

1 is a compressor, and a first four-way valve 2 is installed in the discharge pipe of the compressor 1.
A high-temperature heating I' is provided at one end communicating with the discharge pipe when the electromagnetic coil (not shown) of the first four-way valve 2 is connected to the electromagnetic coil (not shown).
ill' + water heat exchange 2ri 3 a, medium-temperature heating heat exchanger 3b are connected one after another, and the second four-way valve 4 is connected to the other end side that communicates with the discharge pipe at the time of t1v, and the second four-way valve 4 is When the valve 4 is not energized, an indoor heat exchange diameter 5 is provided at one end that communicates with the first four-way valve 4 described in jII, and an outdoor heat exchanger 6 is provided at the other end that communicates with the first four-way valve 2 described in mI when energized. At the same time, the remaining connection ends of the first four-way valve 2 and the second four-way valve 4 are both connected to the achievator 7 arranged in the suction pipe of the compressor 1.The other end of each heat exchanger is connected to the Solenoid valve [3,8'
, 8", expansion valve 99/, gj 7, valve 10 in reverse 1
, 10', and 10'' are connected to each other via a passage to form a refrigerant circuit.

On the other hand, the water side circuit is high 1'! 1? The hot water heat exchanger B53a for heating and the hot water heat exchanger 3b for medium-temperature heating are connected in series through the three-way flow rate control valve 13, and the other end of the three-way flow rate control valve 13 and the hot water heat exchanger 3a for high-temperature heating are connected in series. 7115)
' - The openings are the medium temperature area in the middle and lower part of the hot water tank 11 and the hot water tank 11, respectively.
A loop connected to the medium temperature heating heat exchanger 3b through a variable capacity reversible circulation pump 12 connected to the middle connecting pipe 14, the upper connecting pipe 15, and the bottom of the force meter water tank 11 is connected to the high temperature region of . It consists of

Furthermore, the temperature detectors 14 and 15 are connected to the circulation pump 12, respectively.
It is linked to the capacity control of the three-way flow rate control valve 13 and the flow rate control of the three-way flow rate control valve 13. 18 is a hot water mixing valve, and 19 is a water supply pipe.

In the above configuration, normal cooling operation and heating operation are performed by 2
The two hot water heat exchangers 3a and 3b are not used, and the indoor heat exchanger 5 serves as an evaporator and the outdoor heat exchanger 6 serves as a condenser, or vice versa. Detailed explanation will be omitted.

When hot water is supplied using exhaust heat while cooling, the cycle is compressor 1 - first four-way valve 2 - hot water heat exchanger 3a - = 3b
- Check valve 10 - Solenoid valve 8' - Expansion valve 9'-> Indoor heat exchanger 5 - Second four-way valve 4 -> Axis - Mulator 7 - Compressor 1 and hot water heat exchanger 3a" 3b Condenser, indoor heat exchanger 5
acts as an evaporator, cooling the air conditioner and supplying hot water at the same time. In this case, the three-way flow control valve 1
The middle connecting pipe 14 side of 3 is closed, and the water coming out from the bottom of the hot water storage tank 11 is forced through the circulation pump 12 to exchange heat with the refrigerant in the hot water heat exchangers 3a and 3b. 15 and flows into the upper part of the hot water storage tank 11. At this time, the temperature detector 17 detects the temperature of the heated water and changes the rotation speed of the circulation pump 12 to control the temperature to a predetermined temperature.

Heating start-up time reduction operation is performed by compressor 1 - first four-way valve 2
- Second four-way valve 4 - Indoor heat exchanger 5 → Reverse 11 - Valve 10'
- Solenoid valve 8 - Expansion valve 9 - Hot water heat exchanger 3 b-+ 36
-→First four-way valve 2 - Achimulator 7 - Compressor 1, and indoor heat exchanger 5 becomes a condenser and hot water heat exchanger 3b
acts as an evaporator.

In the defrosting time reduction operation, the outdoor heat exchanger 6 acts as a condenser, and in a similar cycle, the hot water heat exchanger 3b acts as an evaporator. 3-way flow u1 when operating heating stand-up and defrosting.
- The hot water heat exchanger high-temperature heating 3a side of the control valve 13 is closed 1, and the circulation pump 12 is operated in the reverse direction from the middle temperature region of the hot water storage tank 11 to the hot water heat exchanger 3b through the middle temperature region. The hot water has its heat removed and becomes cold water flowing into the bottom of the hot water tank 11.

Hot water heating using a normal outside air heat source is performed by compressor 1 - first four-way valve 2 - hot water heat exchanger 3 a - + 3 b - check valve 1
〇 - Solenoid valve 9'' - Outdoor heat exchanger 6 - Second four-way valve 4 - Achimulator 7 - Compressor 1, hot water heat exchanger for high temperature heating 3a, high temperature discharge gas and hot water heat exchanger for medium temperature heating The heated water is exchanged with the medium-humidity hot water by the heat exchanger 3b, and the hot water reaches a high temperature and flows through the upper connection pipe 15 to the hot water storage tank 11. The water in the two-phase region and the bottom of the hot water storage tank 11 undergoes heat exchange and flows into the medium temperature region of the hot water storage tank 11 via the three-way flow control valve 13 as medium-temperature water. In this case, the temperature sensor 16 varies the capacity of the circulation pump 12 to provide medium-temperature water at a constant temperature, and the temperature sensor 17 changes the opening degree of the three-way flow rate control valve 13 so that water flows into the medium-temperature region of the hot water storage tank 11. High-temperature water at a constant temperature can be obtained by adjusting the ratio of the amount flowing into the high-temperature side 3a of the hot water heat exchanger. The hot water stored in the 2i quality of medium temperature and high temperature in this way is mixed to an arbitrary temperature by the hot water mixing valve 18 and then discharged.

Effect of the invention As described above, the present invention provides the following effects.

■ 1lTj with normal hot water supply: Divide the hot water heat exchanger into two,
1'il for high temperature heating? In the L-water heat exchanger, A in the discharge superheated gas region of the compressor? In addition to jA, L and N, the condensation temperature at which the coefficient of performance of the heat pump cycle determines is Since it is supported by heat exchange, it can be used for hot water supply with high efficiency while obtaining high temperature water.

■ During cooling, the side of the three-way flow FJK control valve connected to the medium temperature range of the hot water storage tank is closed 1, and the flowing water heat exchanger for high temperature heating exchanges heat in the superheated gas region. In this case, heat is exchanged while sufficiently supercooling in liquid region 1 rather than in the two-phase region, so the cooling capacity can be maintained at a high level, and since the water is heated in two stages with two heat exchangers, relatively high temperature l-crystalline water can be heated. It is possible to take out.

[Brief explanation of the drawing]

The figure on page 9 is a configuration diagram of a heat pump hot water supply heating/cooling device showing an embodiment of the present invention. 1...Compressor, 3a...Hot water heat exchanger (for high temperature heating), 3b...Hot water heat exchanger (for medium temperature heating), 5......・Indoor heat exchanger, 6...
・Outdoor heat exchanger, 11...Storage @Hinoki, 12...
...Variable capacity reversible circulation pump, 13...Three-way flow control valve.

Claims (2)

[Claims] (1) A heat pump cycle is constituted by an outdoor heat exchange Hg, an indoor heat exchanger, and a hot water heat exchanger, and the hot water heat exchanger is further divided into high temperature heating and medium temperature heating, and both are three-way flow rate controlled. The three-way flow rate control valve is connected in series through a valve, and a water heat exchange type is connected to the other part of the three-way flow rate control valve and to the IT4 for high-temperature heating.
1 is connected to the medium temperature region in the middle and lower part of the hot water storage tank and the high temperature region in the hot water storage +11 (high temperature region), respectively, and forms a water circulation path from the bottom of the hot water storage tank via a variable capacity circulation pump, and When heating hot water using exhaust heat while cooling, close the side of the three-way flow rate control valve connected to the hot water tank r-quality area, and
A heat pump hot water heating and cooling system configured with two hot water heat exchangers as condensers to heat water to a constant temperature and flow into a high temperature area. (2) When heating hot water using exhaust heat while cooling, the output water temperature of the high-temperature heating heat exchanger can be detected to determine the capacity 2/゛
' A B1-pump hot water heating and cooling system according to claim 1, which controls the capacity of a variable circulation pump.