JPS60234A - Room heating device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heating device that uses a refrigerant as a heat transfer medium.

Conventional Structure and Problems As a conventional floor heating system, a hot water floor heating system using hot water as a heat transfer medium is known. That is, hot water heated by an oil boiler, gas boiler, etc. is conveyed by a hot water circulation pump to a floor panel installed indoors with a built-in hot water pipe, and heating is performed using the sensible heat of the hot water.

The conventional hot water floor heating system described above has a problem in that since the hot water temperature changes between the inlet and outlet of the floor panel, the temperature difference becomes large, impairing the heating effect.

To solve this problem, it is necessary to increase the amount of hot water circulated, and in this case, the power consumption of the hot water circulation pump increases. In addition, copper pipes are generally used as hot water pipes built into floor panels in order to improve heat conduction, but there is a risk that the copper pipes will corrode due to hot water, resulting in hot water leakage. Furthermore, the boiler and the floor panel are connected by hot water piping, and heat radiation loss from this connecting piping is also a problem.

OBJECTS OF THE INVENTION The present invention equalizes temperature and reduces pipe heat radiation loss.

Structure of the Invention In order to achieve the above object, the present invention uses a refrigerant as a heat transfer medium, and constructs a heat transfer circuit by sequentially connecting a convection type radiator, a refrigerant floor heating panel, a refrigerant circulating liquid pump, and a refrigerant heating evaporator in an annular manner. At the same time, the discharge pipe and suction pipe of the refrigerant circulating fluid pump are connected by a bypass circuit with an on-off valve interposed therebetween.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described based on the drawings. In FIG. 1, 1 is a convection type heat radiator, which is composed of a fin tube type heat exchanger 2 and a convection fan 3. 4 is a floor heating panel in which a copper pipe 5 through which a refrigerant as a heat transfer medium flows is buried. Reference numeral 6 denotes a refrigerant circulating liquid pump, which is equipped with a liquid receiver 7 on the suction side. Reference numeral 8 denotes a refrigerant heating evaporator, which includes a combustion section 9 for burning kerosene, gas, or the like. The inlet side of the fin-tube heat exchanger 2 of the convection type heat radiator 1 is an insulated connection pipe 10.
It is connected to the outlet side of the refrigerant heating evaporator 8 via. On the other hand, the outlet side of the fin tube heat exchanger 2 is connected to the inlet side of the floor panel 40 via a heat-insulated connection pipe 11. The outlet side of the floor panel 4 is connected to a suction side liquid receiver 7 of a refrigerant circulating liquid pump 6 via an insulated connection pipe 12. The discharge pipe of the refrigerant circulating liquid pump 6 is connected to the inlet side of the refrigerant heating evaporator 8, and the heat generated by connecting the convection type radiator 1, the floor heating panel 4, the refrigerant circulating liquid pump 6, and the refrigerant heating evaporator 8 in an annular manner is connected to the inlet side of the refrigerant heating evaporator 8. Configure a mobile circuit. This heat transfer circuit is filled with a fluorocarbon-based refrigerant. Reference numeral 13 denotes a bypass pipe that connects the discharge pipe and suction pipe of the refrigerant circulating fluid pump 6, and has an on-off valve 14 interposed therebetween. Incidentally, the amount of combustion in the combustion section 9 is variable.

The operation of the above-mentioned configuration will be explained.1. The heating operation is performed by driving the combustion section 9, the refrigerant circulation pump 6, and the convection fan 3. That is, the refrigerant sent to the refrigerant heating evaporator 8 is heated by the combustion heat of kerosene, gas, etc. generated in the combustion section 9. The heated refrigerant evaporates and becomes a gas, becoming a disaturated gas and passing through the connecting pipe 10. The heat flows into the fin-tube heat exchanger 2 of the convection type radiator 1, and through the action of the convection fan 3, heat is radiated to the indoor air to perform a heating effect. A portion of the refrigerant that has radiated heat into the indoor air turns into a two-phase state, passes through the connecting pipe 11, flows into the copper pipe 5 buried in the floor heating panel 4, heats the floor panel 4, and exerts a radiant heating effect. . The refrigerant that has generated heat on the floor panel 4 condenses again, becomes a saturated liquid at the outlet of the floor panel 4, passes through the connecting pipe 12, is sucked into the refrigerant circulating fluid pump 6 via the liquid receiver 7, and is absorbed into the refrigerant circulating fluid. The pump 6 increases the pressure by the amount of pressure loss caused in the heat transfer circuit, and the refrigerant is sent to the refrigerant heating evaporator 8 again.

Next, the operation when the convection fan 3 of the convection type radiator 1 is stopped and heating is performed only by the floor heating panel 4 will be explained.

At this time, the amount of combustion d1 in the combustion section 9 is reduced to the amount of heating commensurate with the heat dissipation capacity of the floor heating panel 4, and a bypass pipe 13 connecting the discharge pipe and suction pipe of the refrigerant circulating liquid pump 6 is provided. The on-off valve 14 is opened, and a part of the saliva refrigerant discharged from the refrigerant circulating fluid pump 6 is bypassed to the suction side, thereby reducing the amount of refrigerant circulating through the heat transfer circuit. In this way, even during heating using only the floor heating panel 4, the refrigerant heated by the refrigerant heating evaporator 8 becomes a saturated gas and passes through the connecting pipe 10 to the fin tube heat exchanger 2 of the convection type radiator 1. However, since the convection fan 3 is stopped, it simply passes through, with almost no heat radiating effect, and flows into the steel pipe 6 of the floor panel 4 through the connecting pipe 11, where it radiates heat to the floor panel. The refrigerant condenses to become a two-phase refrigerant, passes through the floor panel 4, becomes a saturated liquid refrigerant at the outlet of the floor panel, passes through the connecting pipe 12, and is sucked into the refrigerant circulating liquid bonder 6 again.

As described in detail, the present invention constitutes a heat transfer circuit in which a convection radiator, a floor heating panel, a refrigerant circulating liquid pump, and a refrigerant heating evaporator are sequentially connected in an annular manner, and a fluorocarbon-based refrigerant is used as a heat transfer medium. (1) When using a convection type radiator and a floor heating panel at the same time, and by connecting the discharge pipe and suction pipe of the refrigerant circulation pump with a bypass pipe with an on-off valve, If you only use the panel,
In either case, the refrigerant that flows through the copper pipes of the floor heating panel flows in a two-phase state. In the two-phase region, the refrigerant temperature is constant and a uniform temperature distribution is obtained over the entire surface of the floor heating panel, eliminating the uneven floor temperature distribution seen in conventional hot water systems and increasing the heating effect.

(2) The refrigerant is less corrosive to metals, does not corrode steel pipes buried in floor panels, and does not generate nuscale/excellent durability.

(3) The piping connecting the refrigerant heating evaporator and the convection type radiator is a gaseous type with low heat transfer, and the piping connecting the floor heating panel and the refrigerant circulation pump is a saturated liquid with low heat transfer, so the connection piping It is possible to reduce the heat radiation loss from the heat source and increase the heat utilization efficiency. .

(4) The refrigerant does not freeze, so there is no need to worry about freezing even in low-temperature regions, and no special anti-freezing measures are required.

(5) Simultaneous use of convection type radiators and floor heating panels is also possible.
J function and can enhance the heating effect.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a heating circuit showing an embodiment of the present invention. 1 ・Convection type radiator, 2... Fin tube heat exchanger, 3... Convection fan, 4... ・Floor heating panel, 5... Copper tube, 6... Refrigerant circulating liquid pump, 7...liquid receiver, 8...refrigerant heating evaporator,
9... Tank combustion section, connection piping for 10.11.12.
13... Mountain bypass pipe, 14... Open/close valve.

Claims (2)

[Claims] (1) A heat transfer circuit formed by sequentially connecting a convection radiator, a floor heating panel, a refrigerant circulating liquid pump, and a refrigerant heating evaporator in an annular manner, and the discharge pipe and suction pipe of the refrigerant circulating liquid pump via an on-off valve. Heating device with connected bypass circuit. (2) The heating device according to claim 1, which opens the on-off valve of the bypass circuit when the convection type radiator is stopped.