JPH04236064A - Apparatus for transferring hot/warm heat - Google Patents

Abstract

PURPOSE:To drastically reduce from the conventional requirement the energy expended on the transfer of hot/warm heat source from a heat pump to a load such as an air conditioner in a system for supplying hot/warm heat source from the heat pump to the load through a hot/warm heat source transfer channel. CONSTITUTION:On the side of a load a load-side condenser 55 for exchange of heat with the cold heat of a load is placed. To this load-side condenser 55 a heat pump-side condenser 43 is connected by a hot/warm heat source transfer channel 61 which forms a circulation channel composed of a supply line 63 and a return line 65. On the side of the load in the return line 65, a liquid- receiving tank 67 which holds refrigerant in a liquid state (converts to both gaseous and liquid phases) is placed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat transfer device for supplying a heat source from a heat pump device to a load such as an air conditioner via a heat source transfer path.

0002

2. Description of the Related Art Conventionally, as a heat transfer device for supplying a heat source from a heat pump device to a load side such as an air conditioner, a device as shown in FIG. 2, for example, is known. That is, in the figure, reference numeral 11 indicates a heat pump device, and this heat pump device 11 includes a condenser 13, a compressor 15, and an evaporator 17.

A fan 19 for introducing outside air is arranged in the evaporator 17, and an expansion valve 21 is arranged between the evaporator 17 and the condenser 13. The condenser 13 is connected to a heat source conveyance path 27 consisting of a supply conduit 23 and a return conduit 25, and this heat source conveyance path 27 is directly connected to a load 29 consisting of, for example, an air conditioner. .

[0004] Hot water is stored in the heat source conveyance path 27, and a hot water pump 31 is interposed in the return pipe 25. In the heat transfer device as described above, a refrigerant such as a gaseous fluorocarbon refrigerant that has exchanged heat with the outside air in the evaporator 17 of the heat pump device 11 is compressed in the compressor 15, and then heated in the condenser 13. It exchanges heat with relatively low-temperature hot water in the return line 25 of the source conveyance line 27 and, after being condensed, is recirculated to the evaporator 17.

On the other hand, in the condenser 13, the high-temperature hot water in the supply pipe line 23 of the heat source conveyance line 27, which has undergone heat exchange, is
In a load 29 such as an air conditioner, heat is exchanged with indoor air and the temperature becomes low, and by the action of the hot water pump 31, the condenser 1
Recirculated within 3.

[0006]

However, since such a conventional heat transfer device uses hot water as a refrigerant for supplying a heat source to the load 29, there are problems as described below. That is, in general, when hot water is used as the refrigerant in the heat source conveyance path 27, the temperature difference between the supply conduit 23 and the return conduit 25 is used to convey the heat, so that the temperature normally used is At a difference of 5-7℃, 1
It is necessary to transport about 200 to 140 kg of hot water per 1,000 kcal, and especially when the distance of the heat source transport path 27 is as long as 100 to 200 m, a large amount of transport energy is required and there is a problem that running costs increase. there were.

[0007] Furthermore, it is necessary to increase the pipe diameter of the heat source conveyance path 27 to reduce pressure loss, which poses a problem of increased initial cost. Furthermore, when the heat source conveyance path 27 is placed outdoors, there is a problem in that measures to prevent freezing in winter are required. The present invention solves the above-mentioned problems, and aims to provide a heat transfer device that can significantly reduce the transfer energy required to transfer a heat source from a heat pump device to a load compared to conventional methods. do.

[0008]

[Means for Solving the Problems] The heat transfer device of the present invention provides a heat transfer device for supplying a heat source from a heat pump device-side condenser disposed in a heat pump device to a load side via a heat source transfer path. In the device, a load-side condenser that exchanges heat with the cold heat of the load is arranged on the load side, and the load-side condenser and the heat pump device-side condenser are connected to each other by a circulation system consisting of a supply pipe line and a return pipe line. The refrigerant is connected by a heat source conveyance path having a flow path, and a liquid receiving tank is arranged on the load side of the return path to store a refrigerant in a liquid state that undergoes a gas-liquid phase change.

[0009]

[Operation] In the heat transfer device of the present invention, the refrigerant that undergoes a gas-liquid phase change in the return pipe of the heat source transfer path is in a liquid state, and this refrigerant is in the condenser on the heat pump device side of the heat pump device. It exchanges heat with the high-temperature refrigerant on the load side, becomes a gas, flows into the load-side condenser through the supply pipe, and exchanges heat with the relatively low-temperature refrigerant on the load side, becoming a liquid state.
After being stored in the liquid receiving tank, it is recirculated to the evaporator on the heat pump device side.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, details of the present invention will be described with reference to an embodiment shown in the drawings. FIG. 1 shows an embodiment of the heat transfer device of the present invention. In the figure, reference numeral 41 indicates a heat pump device, and this heat pump device 41 includes a heat pump device side condenser 43, a compressor 45, , and an evaporator 47.

A fan 49 for introducing outside air is arranged in the evaporator 47, and an expansion valve 51 is arranged between the evaporator 47 and the condenser 43 on the heat pump device side. In this embodiment, a load-side condenser 55 that exchanges heat with the cold heat of the load 53 is disposed on the load 53 side such as an air conditioner, and this load-side condenser 55 circulates hot water to the load 53. A hot water pipe 57 is inserted therethrough.

A hot water pump 59 for circulating hot water is disposed in the hot water pipe 57. A heat source conveyance path 61 is arranged to connect the load side condenser 55 and the heat pump device side condenser 43. This heat source conveyance path 61 is formed by a circulation path consisting of a supply pipe line 63 and a return pipe line 65.

On the load side condenser 55 side of the return line 65,
For example, a liquid receiving tank 67 is arranged to accommodate a refrigerant that changes gas-liquid phase, such as a fluorocarbon-based refrigerant, in a liquid state. A liquid pump 69 is arranged downstream of the liquid receiving tank 67. The liquid pump 69 is configured to be turned on and off by a signal from a liquid level sensor 71 disposed within the liquid receiving tank 67.

That is, in this embodiment, the liquid receiving tank 6
When the liquid level in 7 reaches a predetermined liquid level, the liquid pump 69 is configured to be automatically started. In the heat transfer device configured as described above, heat is exchanged with the outside air in the evaporator 47 of the heat pump device 41 and becomes gaseous, for example.
A refrigerant such as a fluorocarbon refrigerant is compressed by a compressor 45,
Thereafter, the refrigerant exchanges heat with the relatively low temperature liquid refrigerant in the return pipe 65 of the heat source transfer path 61 in the heat pump apparatus side condenser 43, is condensed, and is then recirculated to the evaporator 47.

On the other hand, the refrigerant that undergoes a gas-liquid phase change in the return pipe 65 of the heat source conveyance path 61 is in a liquid state, and this refrigerant is heated to a high temperature in the condenser 43 on the heat pump device side of the heat pump device 41. It exchanges heat with the refrigerant, becomes a gas, flows into the load-side condenser 55 through the supply pipe 63, exchanges heat with the relatively low-temperature hot water in the hot water pipe 57 on the load 53 side, and becomes a liquid. The liquid is stored in the liquid receiving tank 67 and recirculated to the heat pump device side condenser 43 through the return pipe line 65.

In the heat transfer device configured as described above, a load-side condenser 55 for exchanging heat with the cold heat of the load 53 is disposed on the load 53 side, and the load-side condenser 55 and the heat pump device The side condenser 43 is connected by a heat source transfer path 61 having a circulation path consisting of a supply pipe line 63 and a return pipe line 65, and a gas-liquid phase change occurs on the load side condenser 55 side of the return pipe line 65. Since the liquid receiving tank 67 that accommodates the refrigerant in a liquid state is provided, it is possible to significantly reduce the transport energy required to transport the heat source from the heat pump device 41 to the load compared to the conventional method.

That is, in the heat transfer device configured as described above, a refrigerant that undergoes a gas-liquid phase change is used as the refrigerant in the heat source transfer path 61, and energy is transferred by the latent heat of this refrigerant. For example, it takes about 20 kg, which is about one-tenth of the conventional energy, to transport
This makes it possible to significantly reduce the transport energy required to transport the heat source from the heat pump device 41 to the load 53 compared to the conventional method, and to significantly reduce running costs compared to the conventional method. Become.

Furthermore, since the transport energy is reduced, there is no need to specially increase the piping diameter of the heat source transport path 61 to reduce pressure loss, and the initial cost can be reduced. Furthermore, even when the heat source conveyance path 61 is placed outdoors, there is no risk of freezing, so there is no need to take measures to prevent freezing in winter.

Note that in the embodiment described above, the return pipe 6
Although an example has been described in which a liquid pump 69 is installed in the heat pump device side condenser 43, the present invention is not limited to such an example.
Of course, when it is located sufficiently above, it is not necessary to arrange the liquid pump.

[0020]

As described above, in the heat transfer device of the present invention, a load side condenser that exchanges heat with cold heat of the load is arranged on the load side, and the load side condenser and the heat pump device side condenser are arranged on the load side. are connected by a heat source conveyance path having a circulation path consisting of a supply pipe and a return pipe, and a liquid receiving tank containing a refrigerant that changes gas-liquid phase in a liquid state is arranged on the load side of the return pipe. Therefore, there is an advantage that the transport energy required to transport the heat source from the heat pump device to the load can be significantly reduced compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a piping system diagram showing an embodiment of a thermal transfer device of the present invention.

FIG. 2 is a piping system diagram showing a conventional heat transfer device.

[Explanation of symbols]

41 Heat pump device 43 Heat pump equipment side condenser 53 Load 55 Load side condenser 61 Heat source conveyance path 63 Supply pipeline 65 Return pipe 67 Liquid receiving tank

Claims (1)

[Claims] 1. A heat transfer device for supplying a heat source from a heat pump device-side condenser disposed in a heat pump device to a load side via a heat source transfer path, wherein the load side is provided with cold heat and heat from the load. A load-side condenser for heat exchange is arranged, and the load-side condenser and the heat pump device side condenser are connected by a heat source conveyance path having a circulation path consisting of a supply pipe line and a return pipe line, A heat transfer device characterized in that a liquid receiving tank is disposed on the load side of a return pipe line to accommodate a refrigerant that undergoes a gas-liquid phase change in a liquid state.