JPH02197767A - Hot water supply device for cooling and heating - Google Patents

Abstract

PURPOSE:To make it possible to store heat and cold in a hot water storage tank and perform both cooling and heating pick up operation based on the heat and cold thus accumulated by dividing a hot water storage tank into accumulator and a hot water storage dedicated tank and connecting the accumulator with the hot water storage dedicated tank so that they may circulate. CONSTITUTION:A refrigerant circuit 12 comprises a compressor 1, a cooling/ heating change over four way valve 3, indoor heat exchangers 4, and 5, expansion valves 6 and 7, and an outdoor heat exchanger 8. A hot water storage dedicated tank 20 is provided with a heater 21. An accumulator 17 communicates with the hot water storage dedicated tank 20 by way of solenoid valves 25 and 26. Solenoid valves 28 and 29 are adapted to supply hot water selectively from the accumulator 17 and the hot water storage dedicated tank 20. A bypass circuit 13 connects both inlet and outlet sides of a refrigerant circuit 12. A refrigerant heat exchanger 16 picks up suction gas or discharge gas selectively on the way to the bypass circuit 13 and heats or cools the accumulator 17. This construction makes it possible to store heat and cold for the accumulator and perform operation in various modes in addition to cold and heat starting operation based on the application of the heat and cold thus accumulated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to an air-conditioning/heating/water supply system that utilizes heat storage to start up heating and cooling operations.

(Conventional Technique WI) Conventionally, as an air-conditioning/heating water supply device equipped with a hot water storage tank, one described in, for example, Japanese Patent Application Laid-open No. 165471/1983 is known. As shown in Figure 2, this air-conditioning/heating/water heating system has the following features:
A compressor 51, an inverter 52 that changes the capacity of the compressor 51, a four-way valve 53 for switching between air conditioning and heating, and an indoor heat exchanger 54.
, an expansion valve 55, an outdoor heat exchanger 56, a three-way valve 57 for switching the flow path of refrigerant gas from the compressor 51, and an indoor heat exchanger 54.
a refrigerant circuit composed of a solenoid valve 58 and the like for controlling the flow of refrigerant to the hot water storage tank 59; a refrigerant heat exchanger 61 inserted into the hot water storage tank 59 from the three-way valve 57 branch C through a pipe 60; A solenoid valve 62 installed on one of the branch paths on the outlet side of the refrigerant heat exchanger 61, a solenoid valve 63 installed on the other side of the branch path on the outlet side of the refrigerant heat exchanger 61, and the three-way valve 57. It is composed of a control device 64 that controls a solenoid valve 58, a solenoid valve 62, and a solenoid valve 63. Note that one of the branch paths on the outlet side of the refrigerant heat exchanger 61 is connected to a solenoid valve 62.
The other is connected to the pipe between the indoor heat exchanger 54 and the expansion valve 55 via the m-magnetic valve 63, and the other is connected to the pipe between the expansion valve 55 and the outdoor heat exchanger 56 via the m-magnetic valve 63.

Next, the operation of the air-conditioning/heating/water supply system having the above configuration will be explained using Table 1.

Table 1 During heat storage (hot water supply heating), the refrigerant gas discharged from the compressor 51 passes through the refrigerant heat exchanger 61 because the three-way valve 57 is connected to AC, and the water in the hot water storage tank 59 is passed through the refrigerant heat exchanger 61. It is heated and condensed, and then passes through the m-magnetic valve 62 and the expansion valve 55 to the outdoor heat exchanger 56, where it evaporates into refrigerant gas and returns to the compressor 51 via the four-way valve 53. .

During heating and hot water supply, the refrigerant gas discharged from the compressor 51 is
Since the three-way valve 57 is connected to A-C and a part is connected to A-S, the water flows to both the refrigerant heat exchanger 61 in the hot water storage tank 59 and the indoor heat exchanger 54, and heats the water in the hot water storage tank 59. and heating at the same time.

During cooling hot water supply, the refrigerant gas discharged from the aE compressor 51 passes through the refrigerant heat exchanger 61, where it heats and condenses the water in the hot water storage tank 59, since the three-way valve 57 is connected a-c. After that, the refrigerant liquid passes through the electromagnetic valve 63 from the piping 60, passes through the expansion valve 55, reaches the indoor heat exchanger 54, evaporates in the indoor heat exchanger 54, becomes refrigerant gas, passes through the four-way valve 53, and reaches the compressor 51. Return to

During normal heating and normal cooling, the refrigerant gas discharged from the compressor 51 does not flow into the refrigerant heat exchanger 61 in the hot water tank 59 because the three-way valve 57 is connected a-b; It passes through the valve 53 and is condensed into a refrigerant liquid in the indoor heat exchanger 54, passes through the expansion valve 55, evaporates in the outdoor heat exchanger 56, becomes refrigerant gas, and returns to the compressor 51 through the four-way valve 53. In addition, during normal cooling, it passes through the four-way valve 53 and is condensed in the outdoor heat exchanger 56 to become a refrigerant liquid, passes through the expansion valve 55 and evaporates in the indoor heat exchanger 54 to become refrigerant gas), and then passes through the four-way valve 53 to the compressor. Return to 51.

However, in the above-mentioned air-conditioning/heating/hot-water supply system, during normal heating and normal cooling, the refrigerant gas discharged from the compressor 51 stores hot water! Since the refrigerant heat exchanger 61 in the hot water storage tank 59 can only be used as a condenser, the heat stored in the hot water storage tank 59 is used. In addition, because the water in the hot water storage WI59 could not store cold, it was not possible to perform a cooling operation using cold energy.

(Problem to be Solved by the Invention) As described above, in the conventional air-conditioning/heating water supply system, during normal heating and normal cooling, the refrigerant gas discharged from the compressor is prevented from flowing into the refrigerant heat exchanger in the hot water storage tank. Since the refrigerant heat exchanger in the hot water storage tank can only be used for the condenser, heating operation using the heat heated in the hot water storage tank is not possible, and the water in the hot water storage tank cannot be used for heating. Since cold storage was not possible, cooling operations using cold heat were not possible.

The present invention was made in view of the above-mentioned circumstances, and an object of the present invention is to provide a multifunctional air-conditioning/heating-water supply device that can store heat and cold in a hot water storage tank and can perform air-conditioning/heating start-up operation using this heat and cold energy. .

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the air conditioning/heating and hot water supply device of the present invention has the following features:
A refrigerant circuit that includes a compressor, a four-way valve for switching between air conditioning and heating, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger, a hot water storage tank that has a heating means, and a hot water storage tank that communicates with the hot water storage tank via a tttm valve. a heat storage device, a hot water supply means for selectively supplying hot water from the heat storage device and a dedicated hot water storage tank, a bypass circuit that connects the suction side and the discharge side of the refrigerant circuit, and a gas or It is characterized by comprising a refrigerant heat exchanger that selectively extracts discharged gas and heats or cools the heat storage device.

(Function) In the device configured in this way, the hot water storage tank is divided into a heat storage tank and a hot water storage tank, and the heat storage tank and the hot water storage tank are connected so as to circulate, so that the hot water storage tank can be connected to the heat storage tank. Both heat storage and cold storage can be performed, and this heat and cold can be used to start heating and cooling, allowing for multi-functional control.In addition, the temperature of the cold storage material in the heat storage device can be adjusted by heating the heater. It is possible to raise the temperature to the same level as when heating, and improve the heating start-up ability.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
The figure shows an air conditioning/heating/water supply system according to an embodiment of the present invention, which includes a compressor 1 for compressing a medium, an inverter 2 for changing the capacity of the compressor 1, and an inverter 2 for changing the capacity of the compressor 1. Four-way valve 3° for switching between air conditioning and heating installed on the discharge side of the 7-liter compressor.Indoor heat exchangers 4 and 5 installed in parallel, which can function as an evaporator and a condenser. T! IE
IJ adjustable expansion valve 6 and expansion valve 7. Outdoor heat exchanger with two (a) evaporator and condenser 8. Solenoid valves 9 and 10 for the indoor heat exchangers 4 and 5 provided between the indoor heat exchangers 4 and 5 and the four-way valve 3. Outdoor heat exchanger 8
and ff1 for the outdoor heat exchanger 8 provided between the four-way valve 3
A refrigerant circuit 12 is configured from the li valve 11 .

A bypass circuit 13 is provided between the four-way valve 3 and the solenoid valves 9 and 100 of this refrigerant circuit 12 and between the solenoid valve 11 and the four-way valve 3 to connect the suction side and the discharge side of the refrigerant circuit 1. Solenoid valves 14 and 1.5 in the bypass circuit 13
is provided.

A heat storage device 76 having a refrigerant heat exchanger 16 is installed between the electromagnetic valve 14 and the m-isofune 15 and between the expansion valve 6 and the expansion valve 70 in parallel with the indoor heat exchangers 4 and 5. This heat storage device 17 is filled with water 18 which is a cold storage heat material, and heat exchange is performed between this water 18 and a medium in a refrigerant heat exchanger 1316.

Also, in the piping between the refrigerant heat exchanger 16 and the expansion valve and 7 in the heat storage device 17! ! A porcelain boat 9 is provided.

Reference numeral 20 denotes a tank exclusively for storing hot water, which has a built-in heater 21 serving as a heating means. A city water intake 22 is provided in this storage 1ff 120, and water 18 flows from the city water intake 22 into the hot water tank 20.
is supplied.

The heat storage device 17 and the hot water storage tank 20 are connected to the piping 23 and the piping 2.
4, and the heat storage device 17 and the water 18 in the hot water storage tank 20 are configured to circulate through the pipes 23 and 24. This piping 23 is provided with an electromagnetic valve 25, and the piping 24 is provided with an electromagnetic valve 26.

27 is a hot water supply outlet, which is connected to the heat storage device 17 and the hot water storage tank 20 via the hot water supply means of electromagnetic valves 28 and 29. The hot water supply means consisting of the vL porcelain boat 8 and 29 is controlled to selectively supply hot water.

Further, the inverter 2 that changes the capacity of the compressor 1 described above controls the rotation speed of the compressor 1 when utilizing heat storage and cold storage.

The aforementioned compressor 1, inverter 2, four-way valve 3, heater 21
, the expansion valves 6 and 7, and each m isobune are controlled by a control device (not shown).

Next, Table 2 shows the operation of one embodiment of the present invention with the above configuration.
Explain with reference to.

Table 2 During heat storage operation, refrigerant gas discharged from the compressor 1 passes through the solid line of the four-way valve 3, passes through the solenoid valve 14, and flows to the refrigerant heat exchanger 16. When passing through this refrigerant heat exchanger 16, the water 18 in the heat storage device 17 is heated and condensed to become a refrigerant liquid,
After that, it passes through the solenoid valve 19 and the expansion valve 7, and then the outdoor heat exchanger 8.
υ, where it evaporates and becomes refrigerant gas, and the solenoid valve 11,
It returns to the compressor 1 via the four-way valve 3. When the refrigerant gas heats the water 18 in the heat storage device 17 described above, the heater 21 installed in the hot water storage tank 20 is energized to heat the water 18 in the hot water storage tank 20.
Heat 8. A solenoid valve 25 is provided in the pipes 23 and 24 connecting the hot water storage tank 20 and the heat storage device 17.
and 26 are opened to circulate the water 18 in the hot water storage tank 20 to the heat storage tank 17. By operating in this manner, the water 18 in the heat storage tank 17 heated by the refrigerant gas is circulated to the hot water storage tank 17. Further heating can be performed by a heater 21 installed inside the chamber 20.

During heating start-up operation using heat storage, compressor 1 is operated at low speed by inverter 2 to compress! ! The refrigerant gas discharged from 41 passes through the solid line of the west valve 3, energizes the electromagnetic valves 9 and 1O provided in parallel, and flows to the indoor heat exchangers 4 and 5. The indoor heat exchangers 4 and 5 condense into a refrigerant liquid, and then the expansion valve 6 and the solenoid valve 19 are energized to the refrigerant heat exchanger 16.
flows to In this refrigerant heat exchanger 16, the water 18 stored in the heat storage 'a17 is heated and evaporated. Thereafter, it returns to the compressor 1 via the solenoid valve 15 and the four-way valve 3.

By operating in this manner, heating operation can be performed using the heat in the heat storage device 17, so that heating can be started up quickly.

During normal heating operation, refrigerant gas discharged from the compressor 1 flows to the indoor heat exchangers 4 and 5 via the solid line of the four-way valve 3, passes through the solenoid valves 9 and 1O provided in parallel. It is condensed in the indoor heat exchangers 4 and 5 to become a refrigerant liquid, and then passed through an expansion valve 6 and then energized to the expansion valve 7 to an outdoor heat exchanger 8, where it evaporates and becomes a refrigerant gas), a solenoid valve l11 It returns to the compressor 1 via the four-way valve 3.

During hot water supply operation, the heater 2 installed in the hot water storage tank 20
1 and the temperature of the water 18 is above a certain temperature, the temperature is detected by a temperature detection means (not shown) K, and the heated water in the Wta1 valve 29 and the hot water storage tank 20 is heated. You can use 18 liters of water until it is replaced with city water. When the amount of hot water is insufficient or when the temperature of the water 18 in the hot water storage WI 20 has not reached a certain temperature, additional heating is performed using a heater 21 installed in the hot water storage tank 20. Further, if the temperature of the water 18 in the heat storage device 17 is higher than a certain temperature after the heating start-up operation, the temperature is detected by the temperature detection means (not shown) K, and the electromagnetic valve 26 is opened. You can use the hot water in the room.

During cold storage operation, refrigerant gas discharged from the compressor 1 passes through the broken line of the four-way valve 3, energizes the m-center valve 11, and flows to the outdoor heat exchanger 8. When passing through the outdoor heat exchanger 8 , it is condensed into a refrigerant liquid, and then flows through the expansion valve 7 and the electromagnetic valve 19 ) to the refrigerant heat exchanger 16 . This refrigerant heat exchanger 1
6, the water 18 in the heat storage device 17 is cooled and evaporated into refrigerant gas 9, and then returns to the compressor 1 through the solenoid valve 14 and the four-way valve 3. When the water 1a in the heat storage device 17 described above is cooled and evaporated, the water 18 is stored with cold.

During cooling start-up operation using cold storage, the compressor 1 is operated at low speed by the inverter 2, and the refrigerant gas discharged from the compressor 1 passes through the solenoid valve 15 via the broken line of the four-way valve 3, and is transferred to the refrigerant heat exchanger. Flows to 16. In this refrigerant heat exchanger 16, the cooled water 18 in the heat storage device 17 cools the refrigerant liquid, which then passes through the WL solenoid valve 9 and the expansion valve 6) to the indoor heat exchangers 4 and 5 installed in parallel. flows. It evaporates into refrigerant gas in the indoor heat exchangers 4 and 5, and then energizes the electromagnetic valves 9 and io installed in parallel, and passes through the four-way valve 3 to the compressor l.
Return to

By operating in this manner, the cooling operation can be performed using the cold heat in the heat storage device 1-7, so that cooling can be started quickly.

During normal cooling operation, the refrigerant gas discharged from the compressor 1 passes through the broken line of the west valve 3 to 1! M valve 11 is completely opened and flows to outdoor heat exchanger 8. It condenses in the outdoor heat exchanger 8 and becomes a refrigerant liquid, then passes through an expansion valve 7.6 and reaches the indoor heat exchangers 4 and 5 installed in parallel, where it evaporates and becomes a refrigerant gas). It passes through electromagnetic valves 9 and 10 installed in parallel, passes through a four-way valve 3, and returns to the compressor l.

The above-mentioned heat storage, heating start-up using heat storage, normal heating, hot water supply, cold storage, cooling start-up using cold storage, and normal cooling operation are performed by a control device (not shown), compressor 1, inverter 2, This is performed by controlling the four-way valve 3 to the heater 21, the expansion valves 6 and 7, and each m-center valve. Still, the compressor 1 performs φ number control by changing the frequency of the driving power source for the compressor 1 using the input/<-interval 2.

Further, in this embodiment, there are two indoor heat exchangers, but the number is not limited to this, and two or more may be used.

〔Effect of the invention〕

According to the present invention, the hot water storage tank is divided into a heat storage tank and a hot water storage tank, and the heat storage tank and the hot water storage tank are connected in a w4 ring with piping, so that heat storage and cold storage can be carried out in the heat storage tank. It is possible to do both.Using this heat and cold, it is possible to start up heating υ and start up cooling, making it possible to perform multi-functional control. Further, the temperature of the cold heat storage material in the heat storage device can be raised to a temperature equivalent to that when heated by the heater, and the heating start-up ability can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a heating/cooling/water supply system according to an embodiment of the present invention, and FIG. 1 is a block diagram of a conventional cooling/heating/water supply system. l...1 pressure unit, 2...inverter, 3...
・Four-way valve, 4.5...Indoor heat exchanger, 6.7
... expansion valve, 8 ... outdoor heat exchanger, 12 ... refrigerant circuit, 13 ... bypass circuit, 16 ... refrigerant heat exchanger, 17 ... heat storage device, 18 ... cold storage Heat material (water),
20...Hot water tank, 21...Heater, n12
4... Piping, 25.26... Solenoid valve, 28.29
...Hot water supply means (electromagnetic valve) 0 Agent Patent attorney Nori Chika
Ken Yudo Uji Hiroryo 5 2nd Ro Kaguchi

Claims (1)

[Scope of Claims] A refrigerant circuit including a compressor, a four-way valve for switching between air conditioning and heating, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger; A dedicated hot water storage tank having heating means; A heat storage device communicated through a valve, a hot water supply means for selectively supplying hot water from the heat storage device and a dedicated hot water storage tank, a bypass circuit connecting the suction side and the discharge side of the refrigerant circuit, and the 1. An air-conditioning, heating, and hot-water supply apparatus comprising a refrigerant heat exchanger that selectively extracts suction gas or discharge gas from a refrigerant circuit and heats or cools the heat storage device.