JPH07167525A - Hot water supplying heat pump system utilizing cooling exhaust heat - Google Patents

Abstract

PURPOSE:To provide a hot water supplying heat pump system utilizing cooling exhaust heat to reduce running cost by effectively putting a facility into practical use. CONSTITUTION:The hot water supplying heat pump system utilizing cooling exhaust heat comprises a hot water supplying heat pump 1 for supplying hot water, a heat source water 2 of the pump 1, a heat exchanger 3 for manufacturing the water, a refrigerator 5 for manufacturing chilled and warm waters, and switching connecting means 15-18 for switching to branch cooling water tube or warm water tube of the refrigerator to connect to be switched to the exchanger. Accordingly, the refrigerator 5 for manufacturing chilled and warm water is effectively used to recover its exhaust heat, and hence a heat source water manufacturing facility is not particularly prepared.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-water supply heat pump system utilizing cooling exhaust heat for utilizing the cooling exhaust heat of a refrigerator or the like for producing cold / hot water for heating heat source water for hot water supply.

[0002]

2. Description of the Related Art FIG. 3 is a view showing a conventional example of a hot water supply system including a hot water supply heat pump, 21 is a hot water supply heat pump, 22 is a water tank, 23 is an air cooling heat pump, 24 is an air heat exchanger, and 25 to 27 are water supply. Shows the pump.

As a system for supplying hot water using a hot water supply heat pump, for example, as shown in FIG. 3, a heat source water is pumped from a water tank 22 to a hot water supply heat pump 21 using a water supply pump 27, and this is used as a heat source from the hot water supply heat pump 21 to a water supply pump 25. There is something that uses hot water to supply hot water. In the case of this system, a heating source is required to produce the heat source water of the water tank 22, and therefore, the air-cooling heat pump 23 and the air heat exchanger 24 are provided, and the heat source water cooled by the hot water supply heat pump 21 is deprived of heat. Is heated to several tens of degrees Celsius (for example, about 30 degrees Celsius to 20 degrees Celsius).

[0004]

As described above, the conventional hot water supply system provided with the hot water supply heat pump requires the air-cooled heat pump 23 and the heating tower 24 as the heat source water production equipment in addition to the hot water supply heat pump for producing the heat source water. Therefore, there is a problem that an initial cost for installing the air-cooling heat pump 23 and the air heat exchanger 24 and a running cost for operating them are required.

An object of the present invention is to solve the above-mentioned problems, and an object thereof is to provide a hot water supply heat pump system using cooling exhaust heat which effectively utilizes equipment to reduce running costs.

[0006]

To this end, the present invention provides a hot water supply heat pump for supplying hot water, a heat source water for the hot water supply heat pump, a heat exchanger for producing the heat source water, and a refrigerator for producing cold / hot water. And a switching connection means for branching and connecting the cooling water pipe or the hot water pipe of the refrigerator to the heat exchanger, and the heat source heated to the output side of the heat exchanger. A temperature detecting means for detecting the temperature of water is provided, a valve is provided on the input side of the heat exchanger, and the temperature of the heat source water is controlled by controlling the opening of the valve. It is characterized by comprising a valve that can be switched depending on the operation mode.

[0007]

In the hot water supply heat pump system utilizing cooling waste heat of the present invention, a hot water supply heat pump for supplying hot water, a heat source water of the hot water supply heat pump, a heat exchanger for producing the heat source water, and a refrigerator for producing hot and cold water. And a switching connection means for branching and connecting a cooling water pipe or a hot water pipe of the refrigerator to a heat exchanger, so that a refrigerator for producing cold / hot water is utilized,
Since the exhaust heat can be recovered, it is not necessary to specially prepare it as heat source water production equipment.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing an embodiment of a hot water supply heat pump system using cooling exhaust heat according to the present invention, wherein 1 is a hot water supply heat pump, 2 is a water tank, 3 is a heat exchanger, 4 is a heating heating tower (cooling tower during cooling). ) 5, a refrigerator for producing hot and cold water, 6 a controller, 7 to 12 a water pump, 13 a temperature sensor, and 14 to 20 valves.

In FIG. 1, a hot-water supply heat pump 1 is for pumping heat source water from a water tank 2 using a water supply pump 9 to make hot water, and supplying the hot water to a tank, for example, using a water supply pump 7. The heat exchanger 3 pumps up heat source water from the water tank 2 by using the water supply pump 9, and heats it using the cooling water pipe of the cold / hot water producing refrigerator 5 or the hot water supplied from the hot water pipe. The temperature sensor 13 is the heat exchanger 3
The controller 6 detects the outlet temperature of
The opening amount of the valve 14 is controlled so that the outlet temperature of the heat exchanger 3 detected by the temperature sensor 13 falls within a predetermined range, and the amount of hot water supplied is adjusted.

The cold / hot water producing refrigerator 5 is for producing cold / hot water, cold water or hot water, and the valves 15 to 18 are
The piping for supplying hot water to the heat exchanger 3 is switched according to the operation mode. For example, when the refrigerator 5 for producing cold / hot water is in an operation mode for producing cold water or cold / hot water at the same time, the valves 15 and 16 are opened and the valves 17 and 18 are opened.
The cooling waste heat of the refrigerator 5 for producing hot and cold water is used to close the valve, and in the operation mode for producing hot water, the valves 15 and 16 are closed and the valves 17 and 18 are opened. Use some hot water.

The valves 19 and 20 are for controlling the temperature of the cooling water, and in order to protect the refrigerator, the valve 19 is kept so that the temperature of the cooling water does not fall below a certain level.
Is adjusted, and the flow rate of the valve 20 is adjusted so as to be opposite to the increase and decrease.

FIG. 2 is a diagram showing a configuration example of a valve switching control circuit, in which SW is an operation mode switch, Mg is an electromagnetic switch, and D1 and D2 are diodes. The refrigerator for producing cold / hot water is one for producing cold / hot water, cold water or hot water as described above, and each operation mode is selected and operated according to the season such as the winter season or the intermediate season. FIG. 2 shows a configuration example of a circuit that controls switching of the valves 15 to 18 according to the operation mode. Operation mode switch SW
Has a position of a cold / hot water operation mode, a cold water operation mode, and a hot water operation mode, and issues an operation command to the cold / hot water producing refrigerator 5 of FIG. 1 according to the mode of the position. The electromagnetic switch Mg is energized when the operation mode switch SW is set to the cold / hot water operation mode position or the cold water operation mode position, and the valves 15 and 16 are opened by the output signal of the contact which is closed at this time. The valves 17 and 18 are opened by the output signal of the contact which is opened at this time. Accordingly, when the cold / hot water producing refrigerator 5 is in the cold / hot water simultaneous extraction operation mode or the cold water operation mode, the valve 15,
Since 16 is opened and valves 17 and 18 are closed, hot water is supplied to the heat exchanger 3 through the cooling water pipe, and is used as a heat source for heat source water from the water tank 2 using the water supply pump 9.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above embodiment, the cooling water pipe or the hot water pipe of the cold / hot water producing refrigerator 5 is switched and connected to the heat exchanger. However, instead of the cold water producing refrigerator and the hot water producing heat pump, the cooling water thereof is used. The pipe or the hot water pipe may be switched and connected to the heat exchanger. Further, the valves 15 to 20 may be electrically operated valves or manual valves.

[0014]

As is apparent from the above description, according to the present invention, a cooling water pipe or a hot water pipe of a refrigerator for cold / hot water production which is usually installed together with a hot water supply heat pump is branched to produce a heat source water for hot water supply. Since it is only necessary to add a heat exchanger as additional equipment, there is no need to specially provide an air-cooling heat pump or the like for producing heat source water, and equipment cost can be reduced. In addition, since the cooling exhaust heat of the refrigerator for cold / hot water production is used, the amount of electric power of the air-cooled heat pump for the conventional heat source water production is reduced, and the running cost for the fan power of the heating tower is reduced. can do.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a hot water supply heat pump system using cooling exhaust heat according to the present invention.

FIG. 2 is a diagram showing a configuration example of a valve switching control circuit.

FIG. 3 is a diagram showing a conventional example of a hot water supply system including a hot water supply heat pump.

[Explanation of symbols]

1 ... Hot water supply heat pump, 2 ... Water tank, 3 ... Heat exchanger, 4 ...
Heating tower, 5 ... Refrigerator for producing cold / hot water, 6 ... Controller, 7-12 ... Water pump, 13 ... Temperature sensor, 14-20 ... Valve

Claims (3)

[Claims] 1. A hot water supply heat pump for supplying hot water, a heat source water for the hot water supply heat pump, a heat exchanger for producing the heat source water, a refrigerator for producing cold / hot water, and a cooling water pipe for the refrigerator. A hot water supply heat pump system using cooling waste heat, comprising: a switching connection means for branching a hot water pipe to switch and connect to a heat exchanger. 2. The heat source is provided by providing a temperature detecting means for detecting the temperature of the heated heat source water on the output side of the heat exchanger, and by providing a valve on the input side of the heat exchanger and controlling the opening of the valve. The hot water supply heat pump system using cooling exhaust heat according to claim 1, wherein the temperature of water is controlled. 3. The hot-water supply heat pump system using cooling exhaust heat according to claim 1, wherein the switching connection means is composed of a valve that is switched depending on an operation mode of the refrigerator.