JPS6118374Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cooling device that utilizes a highly efficient refrigeration cycle to obtain high-temperature water necessary for hot water supply.

Generally, when obtaining hot water for hot water supply using a refrigeration cycle,
The hot water temperature was low and a large auxiliary heater was required, and even if highly efficient hot water was obtained through the refrigeration cycle, the temperature had to be raised using the auxiliary heater, resulting in low overall efficiency.

This idea attempts to improve this point,
In order to obtain as hot water as possible in the refrigeration cycle, as the hot water temperature rises, the condensation pressure in the hot water heat exchanger is detected and the downstream condenser capacity is controlled. It is for getting water.

An embodiment of this invention will be described in detail below based on the drawings. That is, in the figure, 1 is a compressor.
2 is a heat exchanger for hot water supply, and a heat exchange coil 3 for hot water supply is provided in the vessel. 4 is an air-side heat exchanger provided downstream of the hot water supply heat exchanger 2 and has a blower 5; 6 is an air-side heat exchanger provided in the piping between the hot water supply heat exchanger 2 and the refrigerant temperature on the outlet side of the hot water supply heat exchange coil 3; Alternatively, a detector 7 detects pressure and controls the blower 5, and 7 is an expansion device that expands the refrigerant. Reference numeral 8 denotes an air conditioning heat exchanger, and an air conditioning heat exchange coil 9 is provided in the vessel. 10 is a hot water supply tank; 11 is a hot water supply pump that supplies water in the hot water supply tank to the hot water heat exchanger 2;
2 is a hot water faucet installed in the hot water tank 10; 13 is a tank for supplying water to the hot water tank; 14 is a water pipe;
15 is an auxiliary electric heater provided in the hot water supply tank 10, 16 is an air conditioning pump that supplies cooling water from the air conditioning heat exchanger 8 to the indoor heat exchanger 17, and 18 is an air conditioning expansion tank. . In this configuration, the high temperature, high pressure gas discharged from the compressor 1 is heat exchanged by the hot water supply heat exchange coil 3, and the water in the hot water supply heat exchanger 2 is heated. This heated water is circulated between the hot water supply tank 10 and the hot water supply heat exchanger 2 by the hot water supply pump 11.

When the water temperature in the hot water supply tank 10 is low, the hot water supply heat exchange coil 3 acts as a condenser, and the condensed refrigerant passes through the downstream air side heat exchanger 4 because the blower 5 is stopped and expands. It reaches the device 7, where it expands under reduced pressure, reaches the air conditioning heat exchange coil 9, and evaporates. At this time, the water in the air conditioning heat exchanger 8 is cooled. This cooled water is sent to the indoor heat exchanger 17 by the air conditioning pump 16 and is used to cool the room. In this way, the hot water supply heat exchange coil 3 is used as a condenser to cool the room, but if this operation continues,
As the temperature of the hot water supply water increases, the temperature or condensation pressure of the refrigerant in the hot water supply heat exchange coil increases, so this is detected by the detector 6 and the temperature is Controls the blower 5. By operating the blower 5, the condensing action is performed within the air side heat exchanger 4, so that the condensing pressure returns to normal.

On the other hand, in the hot water supply heat exchange coil 3, only the high temperature portion (approximately 120 to 160° C.) of the discharged refrigerant gas is heat exchanged, so that the hot water temperature can be increased without increasing the condensation temperature. If even higher hot water is required, it can be obtained by an auxiliary electric heater 15 provided in the hot water tank 1.

Although this embodiment shows the case where the air side heat exchanger 4 is provided downstream of the hot water supply heat exchange coil 3, a water side heat exchanger is provided instead of the air side heat exchanger and the detector 6 A similar effect can be obtained by controlling the amount of cooling water in the water side heat exchanger.

Further, in the above embodiment, a cooling-only machine has been described, but a heat pump type machine in which the refrigerant circuit is switched can be implemented in exactly the same manner.

As mentioned above, the cooling system according to this invention uses a part of the condenser in the refrigerant path as a heat exchanger for hot water supply, and depending on the refrigerant temperature or pressure at the outlet side of this heat exchanger, another condenser is used. By controlling the degree of cooling, it is possible to efficiently obtain high-temperature hot water for hot water supply.

[Brief explanation of the drawing]

The figure is a schematic diagram showing an embodiment of this invention. In the figure, 1 is a compressor, 2 is a heat exchanger for hot water supply, 4 is an air side heat exchanger (condenser), 5 is a blower, 6 is a refrigerant temperature or pressure detector, 7 is an expansion device, and 8 is for air conditioning. A heat exchanger, 10 a hot water supply pump, and 11 a hot water supply tank.

Claims (1)

[Scope of utility model registration request] A heat exchanger for hot water supply where the refrigerant drawn out from the compressor is guided and exchanges heat with water for hot water supply, and a heat exchanger for hot water supply that is installed downstream of this heat exchanger for hot water supply and works together with the heat exchanger for hot water supply. A condenser that condenses the refrigerant; an evaporator that evaporates the refrigerant from the condenser; and an evaporator that evaporates the refrigerant from the condenser; A cooling device comprising a device that detects temperature or pressure to control the degree of cooling of the condenser.