JPS5826939A - Hot water supply apparatus - Google Patents

Abstract

PURPOSE:To reduce the running cost of a hot water supply system by a construction wherein an open tank used as a water reservoir and in which water is supplied directly and a hermetically sealed tank adapted to be preheated by a heat pump are provided so that the hot water can be supplied from the sealed tank into a boiler. CONSTITUTION:The hot water system comprises an open tank 2 in which water can be automatically fed in proportion to be volume of water to be used in order to keep constant the valume of water stored therein, and a hermetically sealed tank 1 adapted to be heated by the radiation heat from a condenser 6 of a heat-pump type refrigerator. Said arrangement is made such that water can be supplied by a pump 4 at a constant pressure from the tank 2 into the tank 1 and hot water can be discharged from the tank 1 through a hot water supply pipe 14. Stating in brief, the running cost of this system can be kept lower than that of the system wherein water is heated directly by a boiler.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water supply system that preheats water using a heat pump type chiller and then heats it to a predetermined temperature using a boiler. The system is equipped with an open tank and a closed tank that is preheated and stored using a heat pump, and hot water is supplied from the closed tank to a boiler or a boiler, and hot water is supplied at a constant temperature depending on the amount used.

In a hot water supply system that utilizes heat dissipation from the condenser of a heat pump type refrigerator, preheated water (a) is stored in an open tank that is directly supplied with water, and the cold water side from the water tank goes directly to the boiler, and the hot water side goes directly to the boiler. When water and hot water are supplied to Karan respectively through the tank, cold water is supplied according to the amount used, so the water temperature in the tank drops rapidly, but it is difficult to quickly recover the temperature immediately after pre-heating in a large tank. To correct this, it is necessary to open the faucet or operate the mixing valve.

In view of this, the present invention divides the water storage tank into an open tank and a closed tank, and both tanks have the required amount of water, respectively, and the water in the closed tank is preheated by a heat pump to prevent sudden changes in temperature. It is possible to supply almost constant temperature hot water from a faucet without having to operate a faucet or mixing valve, and an open tank that can automatically supply water according to the amount of water used to keep the water storage constant. A closed tank is heated using the heat radiation of a heat pump type refrigerator, and water can be supplied from the open tank to the closed tank at a constant pressure using a pump, and the water is heated from the closed tank via a hot water pipe. The main point is that a boiler was installed in a part of the hot water pipe to discharge water.

The present invention will be explained below based on illustrated embodiments. In the figure, l is a closed tank, 2 is an open tank, and both tanks 1 and 2 are open tanks.
．． Tanks 2 and 2 are designed to store and hang the water of the required water, and these two tanks may be installed separately in the shipyard equipment, but in order to make the equipment more compact and efficient, it is possible to open them onto closed tanks. Install the tanks one on top of the other. Water is supplied to the open tank through a water supply device 3 such as a ball tap so as to always maintain a constant water level, and both tanks are connected through a water supply pump 4 and a water supply pipe 5, so that the water in the open tank is The water is pumped up by a water supply pump 4 and is supplied into a sealed tank via a water supply pipe 5. In this case, it is desirable to supply water to the inner bottom of the closed tank.

In addition, the water stored in the sealed tank l is heated by a heat pump type refrigerator.This can be done by installing the condenser of the heat pump type refrigerator so that it is directly submerged in the sealed tank, but as shown in the figure, A double-pipe condenser 6 is installed outside the tank, and the water in the closed tank is circulated through one arm of the condenser 6 using a pump 7, and the refrigerant is allowed to flow down the other pipe. The heat energy of the refrigerant is exchanged with the water in the sealed tank to heat it. This condenser 6
An evaporator 8 is connected to the evaporator 8 via a refrigerant circuit 9, and a compressor IO and an expansion valve 11 are connected to this circuit 9.

Further, the discharge side of the pump 4 is bifurcated with the water supply pipe 5, and a water supply pipe 12 is provided in a bifurcated manner, and this water supply pipe 12 is led to a water supply port 13 such as a faucet (as well as provided in a closed tank l). A boiler 15 is provided in the water supply pipe 14 and a part of the water supply pipe, and both pipes 12 and 14 are connected to a mixing valve 16 connected to the water supply port 13, where water and Kei are mixed in a required ratio or either one of them. The water is selectively mixed with water at a predetermined temperature and used as water.

In addition, pressure reducing valves 17 are attached to the water supply pipes 5 and 12.

The water filled in the sealed tank is operated by a heat pump refrigerator and circulated through the M condenser, where it is heat exchanged, ie, heated. If the water in this closed tank is circulated by the pump 7, the water temperature will gradually rise and the water will be kept warm and stored at a predetermined temperature. When in use, when the faucet 13 is opened, the hot water in the sealed tank is pumped out by the water pressure supplied to the inner bottom of the sealed tank from the sekito ink in conjunction with the pump 4. It is released after At this time, if the temperature is low due to the preheating in the sealed tank, the boiler 15 further heats the water, but the water supplied from this boiler and the water supplied from the water supply pipe 12 from the pump 4 are mixed by the mixing valve 1.
6, mix at a predetermined temperature and use.

Water is automatically supplied to the open tank using a pole tap, etc. when the water level is low.

Further, the evaporator 8 of the heat pump refrigerator is equipped with a fan 18 for forced heat exchange, and the fan 18 and the evaporator 8
absorbs thermal energy from the atmosphere. The air cooled by the evaporator is released into the atmosphere, but in summer, the air cooled by the evaporator is concentrated in ducts as cold air and used directly for cooling indoor rooms. Furthermore, the cold air from this evaporator can be stored and used.

FIG. 2 shows an embodiment of a method for storing heat from cold air in an evaporator. In this embodiment, the evaporator has a structure such as a double pipe type, and the refrigerant and other fluid are made to flow down the evaporator 81 in a state where they can exchange heat, and the pump 19 is used to transfer the cold water to the heat storage tank 21 and the evaporator 81.
181 Questions Water is circulated and cold water is stored in the tank 21, and this cold water is led out from the pipe 24 and heat exchanged by a fan coil consisting of a heat exchanger 22 and a fan 23, and is used as cold air for indoor air conditioning and other purposes. It is something to do.

In addition, when the water temperature in the cold water heat storage tank reaches a predetermined temperature and there is no need to obtain cold water, or during the winter when there is no need to use air conditioning, only hot water is obtained by switching the solenoid valve 25 using the evaporator 8 that uses an air heat source. .

According to the present invention, an open tank capable of supplying water to the water storage tank;
The tank is divided into a closed tank that is preheated by a heat pump, and water is supplied to the closed tank from the open tank side through a water supply channel between both tanks, making the tank warmer than the closed tank. Because the water is released, running costs are reduced compared to methods that heat water directly in a boiler.The water storage tank is divided into two, and only the closed tank is preheated, so it is an open tank. The temperature of the cold water supply pipe 12, which is more directly supplied with water, remains unchanged. On the other hand, hot water supply pipe 1
4, even if cold water is supplied into the closed tank due to use and the temperature suddenly drops, it will be heated in the boiler 15 and the outlet of the boiler 15 will be kept almost constant, so as a result, the temperature at the faucet will not suddenly drop. Mixing valve 16 during use can be prevented from dropping.
This has the advantage that no adjustment is necessary.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic diagram, and FIG. 2 is an explanatory diagram of a different embodiment. l... Sealed tank 2... Open tank 3... Water supply device 4... Water supply pump 5... Water supply pipe 6-... Condenser 7-- Pump 8...・Evaporator 9... Refrigerant circuit lO... Compressor 11... Expansion valve 12... Water supply pipe 13... Water supply port 14...・Hot water pipe 15...Boiler 16...Mixing valve 17...Pressure reducing valve 18...Fan patent applicant Hitachi Cooling and Refrigeration Housing Equipment Co., Ltd. Representative Person Cup i# /'明・( 1. Indication of the case Ushidera Gan Akiko J-/,) l-, f-gu32, Name of the invention 3. Relationship with the amended person case Address history of the person who issued the patent Q, ki Chiyo InV-IIi' 113t
, ;n-cho 1n123 2 Name Hitachi Refrigeration ("Setup"
Soviet company 4, agent Month, Day 6, 1939, number of inventions increased by amendment (1) Page 8, line 6 of the specification, "Cold water all pipes 24" was replaced with "Cold water pipes with pump 26"24". (2) Add the code "26" to Figure 2 in the drawing. Please make additions based on the attached drawing.

Claims (5)

[Claims] (1) An open tank that can be automatically filled with water according to the amount of water used to keep the amount of water stored constant, and a closed tank that is heated using the heat radiation of a heat pump type refrigerator are opened using a pump. This water heater is capable of supplying water at a constant pressure from a tank to a closed tank, and also discharges heated hot water from the closed tank via a hot water supply pipe. (2) An open tank that can be automatically filled with water according to the amount of water used to maintain a constant amount of water stored, and a closed tank that is heated using the heat radiation of a heat pump refrigerator are opened using a pump. A water supply system that enables water to be supplied from a tank to a closed tank at a constant pressure, and also includes a boiler installed in a part of a hot water supply pipe that allows heated hot water to be discharged from the closed tank via a hot water supply pipe. (3) The hot water supply device according to claim 1 or 2, characterized in that cold air obtained from an evaporator of a heat pump refrigerator is used for cooling purposes. (4) In order to keep the amount of water stored constant, we have an open tank that can be automatically filled with water depending on the water source used, and a closed tank that is humidified using the heat radiation of the heat pump refrigerator. A hot water supply system in which water can be supplied from an open tank to a closed tank at a constant pressure, and heated hot water is discharged from the closed tank via a hot water supply pipe, and cold water is obtained by the evaporator of the heat pump refrigerator. Device. (5) ¥! 11 A heating device such as a boiler is installed in a part of the hot water supply pipe that discharges heated hot water from the closed tank via the hot water supply pipe, and a cold water thermal storage system is used to store the heat of the cold water obtained by the evaporator of the heat pump refrigerator. The hot water supply device according to item 4 of the scope of the patent application, characterized in that a tank is provided, cold water is circulated between the cold water heat storage tank and a fan coil, and cold air is taken out.