JPH0486429A - Heater - Google Patents

Abstract

PURPOSE:To circulate refrigerant with a small-sized liquid pump by providing a liquid receiving a liquid receiving tank, a vaporizer, and a condenser, and installing a first pipeline, a second pipeline, a return pipeline, and a loop pipeline and a liquid condenser above the liquid receiving tank. CONSTITUTION:The refrigerant in a liquid receiving tank 31 is adapted to pass through a first pipeline 39 and flows into a vaporizer 32 by means of a liquid pump 41 where it is vaporized. Then, it flows into a condenser, passing through a second pipeline 42 where it is condensed, thereby heating the indoor air. Then, the refrigerant circulates into the liquid receiving tank 31, passing through a return pipeline 45. A loop pipeline 71 is installed to a gas section 69 in the upper part of the tank 31 where a liquid condenser 59 is installed above the tank 31. Due to this construction, the refrigerant gas portion which flows into the gas section 69 in the tank 31 from the return pipeline 45, is arranged to flow into the liquid condenser 59, passing through the loop pipeline 71 where it is recondensed and drops into the tank 31 by gravity where it is decompressed and sucked up into the tank 31. It is therefore, possible to reduce the size of the liquid pump 41.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heating device, and particularly to a heating device using a refrigerant that undergoes a gas-liquid phase change.

[Conventional technology]

BACKGROUND ART Conventionally, as a heating and cooling apparatus using a refrigerant that undergoes a gas-liquid phase change, such as a fluorocarbon-based refrigerant, there is known, for example, the one disclosed in Japanese Patent Laid-Open No. 2-57835, which was previously filed by the present applicant.

Figure 2 shows the air conditioning system disclosed in this publication. It is configured by disposing at least one indoor evaporator/condenser 15 that exchanges heat with the indoor evaporator/condenser 15, necessary piping and cooling/heating switching valves, and a liquid pump 17 that performs a heat cycle using these. , Freon-based refrigerants are used as heat transport means.

In the above-mentioned air-conditioning equipment, a fluorocarbon-based refrigerant is circulated as a heat transport means, which reduces the amount of refrigerant transported, reduces power consumption, and reduces the size of piping to save installation space. It becomes possible to do so.

In addition, conventional liquid pump systems can only perform air conditioning, but this air conditioning system has a reversible cycle, so it can be used for both cooling and air conditioning.Furthermore, it is suitable for use as a DHC heat source, and can reduce indoor loads. Unbalance can also be easily controlled.

In this air-conditioning system, during heating, the liquid pump 1
7 is activated, the refrigerant in the liquid receiving tank 11 flows through the first pipe line 19 to the condenser/evaporator 13, as shown by the bold line in the figure, where it is subjected to evaporation action, and then transferred to the second pipe line. The liquid flows into the indoor evaporator/condenser 15 through 21, where it undergoes a condensing action and heats the indoor air, and then circulates into the receiving tank 11 through the return line 23.

(Problems to be Solved by the Invention) However, in such a conventional air-conditioning device, the refrigerant is forcedly circulated by the operation of the liquid pump 17.
Relatively large liquid pump 17 with sufficient forced circulation capacity
The problem was that it required

In particular, the indoor evaporator/condenser 15 is located below the liquid receiving tank 17.
is arranged, or the resistance of each pipe line 19, 21, 23 is large, and when heating using the return pipe line 23,
There was a possibility that the actual head would become very large, making it difficult to perform sufficient forced circulation.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a heating device that can reliably circulate a refrigerant using a relatively small liquid pump.

[Means to solve the problem]

The heating device according to the present invention includes: a liquid receiving tank that stores a refrigerant in a liquid state that undergoes a gas-liquid phase change; an evaporator that exchanges heat between the refrigerant and an external heat source; and a heating device that exchanges heat between the refrigerant and indoor air. a condenser to be replaced; a first pipe line connecting the outlet side of the liquid receiving tank and one side of the evaporator and having a liquid pump interposed therein; and the other side of the evaporator and one side of the condenser. a second pipe line connecting the condenser to the inlet side of the liquid receiving tank, a return pipe connecting the other side of the condenser to the inlet side of the liquid receiving tank, and one end and the other end communicating with a gas section formed in the upper part of the liquid receiving tank. and a liquid condenser which is disposed above the liquid receiving tank in the loop pipe and cools the gaseous refrigerant in the gas section of the liquid receiving tank.

[For production]

In the heating device of the present invention, when the liquid pump is operated, the refrigerant in the liquid receiving tank flows through the first pipe line into the evaporator, where it is subjected to evaporation action, and then passes through the second pipe line. The air flows into the condenser, where it undergoes a condensing action and heats the indoor air.
The liquid is circulated through the return line into the receiving tank.

In the present invention, a loop pipe line is provided in which one end and the other end are communicated with the gas part formed in the upper part of the liquid receiving tank,
A condenser that cools the gaseous refrigerant in the gas part of the liquid receiving tank is placed above the receiving tank in this loop line, so the refrigerant that flows into the gas part of the liquid receiving tank from the return line of gas passes through one end of the loop pipe, is recondensed in the condenser, and naturally falls from the other end of the loop pipe into the liquid storage part of the liquid receiving tank, which causes the internal pressure in the liquid receiving tank to decrease. reduce,
The refrigerant in the return pipe is drawn toward the liquid receiving tank.

[Example] Hereinafter, an example in which details of the present invention are shown in the drawings will be described.

FIG. 1 shows an embodiment of the heating device of the present invention.
In the figure, reference numeral 31 indicates a liquid receiving tank that stores a refrigerant that changes gas-liquid phase, such as a fluorocarbon-based refrigerant, in a liquid state.

Reference numeral 33 indicates an evaporator for exchanging heat between the refrigerant and an external heat source, and a heat source supply pipe 35 for supplying the heat source from the outside is inserted through the evaporator 33 .

Reference numeral 37 indicates a plurality of condensers (only one is shown) that exchange heat between the refrigerant and indoor air.

A first pipe line 39 is formed by connecting the outlet side of the liquid receiving tank 31 and one side of the evaporator 33, and a liquid pump 41 is disposed in the first pipe line 39.

Further, a second pipe line 42 is formed by connecting the other side of the evaporator 33 and one side of the condenser 37.

Furthermore, a return pipe line 45 is formed by connecting the other side of the condenser 37 and the inlet side of the liquid receiving tank 31.

In this embodiment, the heat source supply pipe 35 includes a second
A control valve 49 whose opening degree is controlled by a signal from a pressure sensor 47 arranged in the pipe line 42 is arranged, and the control valve 49 is configured to control the vaporization of the refrigerant in the evaporator 33. ing.

Further, a liquid level sensor 55 is disposed on the side of the evaporator 33 in the first pipe line 39, and the operation of the liquid pump 41 is controlled by a signal from the liquid level sensor 55. ing.

Furthermore, a control valve 5 is provided near the condenser 37 in the return pipe 45.
1 is arranged, and this control valve 51 is configured so that its opening degree is controlled by a temperature sensor 53 arranged indoors.

In this embodiment, one end and the other end of the loop pipe 71 are communicated with the gas section 69 formed at the upper part of the liquid receiving tank 31 .

A condenser 59 for cooling the gaseous refrigerant in the gas section 69 of the liquid receiving tank 31 is disposed above the liquid receiving tank 31 in the loop conduit 71.

This condenser 59 has a cold water supply pipe 61 that supplies cold water.
A control valve 65 whose opening degree is controlled by a signal from a pressure sensor 63 disposed in the liquid receiving tank 31 is disposed in the cold water supply pipe 61 .

In the heating device configured as described above, the liquid receiving tank 31
The refrigerant inside is transferred to the first pipe line 39 by the operation of the liquid pump 41.
The air flows into the evaporator 33 through the evaporator 33, where it is evaporated, flows into the condenser 37 through the second pipe 42, where it receives the condensation action, heats the indoor air, and then returns. Conduit 45
The liquid is circulated through the liquid receiving tank 31.

Therefore, in the heating device configured as described above, a loop pipe line 71 is provided, one end of which is communicated with the other end of the gas part 69 formed in the upper part of the liquid receiving tank 31, and the loop pipe line 71 is A condenser 5 that cools the gaseous refrigerant in the gas section 69 of the liquid receiving tank 31 is located above the liquid tank 31.
9, the gas portion of the refrigerant flowing into the gas section 69 of the liquid receiving tank 31 from the return pipe 45 is transferred to the loop pipe 71.
The liquid passes through one end, is recondensed in the liquid condenser 59, and naturally falls from the other end of the loop pipe line 71 into the liquid storage part 73 of the liquid receiving tank 31, thereby reducing the internal pressure in the liquid receiving tank 31. , the refrigerant in the return pipe line 45 is drawn toward the liquid receiving tank 31 side.

Therefore, the circulation of the refrigerant in the return pipe line 45 becomes very smooth, and it becomes possible to reliably circulate the refrigerant using the relatively small liquid pump 41.

In particular, even when the condenser 37 is disposed below the liquid receiving tank 31 or when the resistance of each pipe line 39°42.45 is large, it is easily possible to perform sufficient forced circulation. Become.

Furthermore, since it is possible to reduce the capacity of the liquid pump 41, it is possible to reduce manufacturing costs and power consumption costs.

Furthermore, in the heating device configured as described above, the condenser 59 only needs to re-condense the gas that has been depressurized and flashed in the return pipe 45, for example.
As such, it is possible to use a relatively simple device with a small capacity.

Further, in the heating device configured as described above, a loop pipe line 71 is separately provided in the liquid receiving tank 31, and this loop pipe line 7
Since the condenser 59 is arranged in the return pipe 4
There is no increase in the pipe resistance of 5th class pipes.

〔Effect of the invention〕

As described above, according to the present invention, there is provided a loop pipe whose one end and the other end are communicated with the gas section formed in the upper part of the liquid receiving tank, and the loop pipe is connected to the gas section above the liquid receiving tank. Since a condenser that cools the gaseous refrigerant in the gas section of the liquid receiving tank is placed at the position, the gas portion of the refrigerant that flows into the gas section of the liquid receiving tank from the return pipe passes through one end of the loop pipe.
The refrigerant is recondensed in the condenser and naturally falls from the other end of the loop pipe into the liquid storage part of the liquid receiving tank, which reduces the internal pressure in the liquid receiving tank and causes the refrigerant in the return pipe to drop into the liquid receiving tank. Since the refrigerant is drawn toward the tank, the refrigerant can be circulated very smoothly in the return line, and there is an advantage that the refrigerant can be reliably circulated using a relatively small liquid pump.

[Brief explanation of drawings]

FIG. 1 is a piping system diagram showing an embodiment of the heating device of the present invention. FIG. 2 is a piping system diagram showing a conventional heating and cooling system. [Explanation of symbols of main parts] 31...Liquid receiving tank 33...Evaporator 37...Condenser 39...First pipe line 41...Liquid pump 42...Second pipe line 45...Return pipe line 69...Gas section 71...Loop pipe line. 1st WJ 33 (!! departure) 2nd

Claims (1)

[Claims] (1) A liquid receiving tank that stores a refrigerant that undergoes a gas-liquid phase change in a liquid state, an evaporator that exchanges heat between the refrigerant and an external heat source, and a condenser that exchanges heat between the refrigerant and indoor air. , a first pipe line connecting the outlet side of the liquid receiving tank and one side of the evaporator and having a liquid pump interposed therein; and a second pipe line connecting the other side of the evaporator and one side of the condenser. a return pipe connecting the other side of the condenser and the inlet side of the liquid receiving tank;
a loop pipe line whose one end and the other end communicate with a gas section formed in the upper part of the liquid receiving tank; and a gas section of the liquid receiving tank arranged at a position above the liquid receiving tank of the loop pipe line. A heating device comprising: a condenser for cooling a gaseous refrigerant;