JPH04187993A - Heat conveying device - Google Patents

Abstract

PURPOSE:To enable execution of conveyance of high capacity of heat by a method wherein through orderly opening and closing of a valve of a plurality of liquid receivers, a heating medium is caused to flow in or out from the liquid receiver and a liquid refrigerant is fed to a gas liquid separator, and an amount of a refrigerant fed to the gas liquid separator by means of a plurality of the liquid receivers is increased. CONSTITUTION:When at least one of on-off valves located to a plurality of liquid receivers 4 and 4' is closed, a liquid refrigerant producing overcooled liquid by means of a radiator 8 flows through a heating medium pipe 12 and flows in after the flows of it through either a second check valve 11 or 11''. By cooling and condensing a gas refrigerant in the liquid receiver by means of an overcooled liquid refrigerant, the liquid receiver is filled with a liquid refrigerant. By opening the on-off valve, corresponding to the liquid receiver filled with the liquid refrigerant, through the working of a control device 16, the liquid receiver is communicated to a gas liquid separator 2 through an uniform pressure pipe 7, and the liquid refrigerant in the liquid receiver is caused to flow through first check valves 5 and 5' to the gas liquid separator 2 under gravity. Inflow to and outflow from one liquid receiver is executed, in order, by staggering inflow to and from the other liquid receiver. An amount of the liquid refrigerant fed from the liquid receiver to the gas liquid separator 2 can be increased without a time required for one full period in which one liquid receiver is opened and closed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat transfer device that transfers heat to a user side by utilizing the pressure increase when heating a refrigerant as a heat medium.

Conventional technology A liquid refrigerant filled in a single liquid receiver uses a heat-driven heat transfer system that heats the refrigerant with combustion heat from a burner and uses the pressure of the evaporating refrigerant to circulate the refrigerant. was intermittently supplied to the refrigerant heater, and the period of intermittent supply was set in accordance with the physical properties of the refrigerant and the amount of heat transferred.

In the above heat transfer method, the effective internal volume of the liquid receiver is v (C
:d) Latent heat Δi (kcal/kg) of heating medium, density ρ (g/cj) of liquid refrigerant, number of opening/closing operations of the on-off valve N(
cycles/h), heat transfer IQ (kca I/h
) Then, in order to increase the heat transfer amount Q, there are methods to increase the internal volume of the liquid receiver, increase the number of opening/closing operations N, or increase the density of the liquid refrigerant. However, in order to increase the internal volume of the liquid receiver and the number of opening/closing operations N, it is necessary to increase the time Toff (closing time of the on-off valve) to fill the liquid receiver Time for the liquid refrigerant in the liquid container to completely flow out Ton (opening time of the on-off valve)
The operating period Ts is reduced by reducing either or both of
= Ton+Toff had to be made small, and there was a problem with the heat dissipation ability of the radiator or the pressure loss resistance of the refrigerant pipeline.

The present invention solves these problems, and aims to improve the heat transfer ability of a heat transfer device and transfer a larger amount of heat.

Means for Solving the Problems In order to solve the above-mentioned problems, the heat transfer device of the present invention has an annular passage connecting a heat medium heating machine and a gas-liquid separator provided above it with piping, and a heat transfer device of the present invention. a plurality of liquid receivers provided above, a plurality of first check valves connecting each liquid receiver and the gas-liquid separator, a heating medium outlet side of the heating medium heater and the plurality of liquid receivers; a plurality of on-off valves provided in a pressure equalizing pipe connecting the gas-liquid separator and the radiator, a plurality of second non-return valves provided on the upstream side of the plurality of liquid receivers; The heat transfer device of the present invention is configured to include a heat medium return pipe that connects the valve and the radiator, and a control device that controls opening and closing of the plurality of on-off valves. The on-off valves of the liquid vessels are sequentially opened and closed to cause the heat medium to flow into or out of the liquid receiver to supply liquid refrigerant to the gas-liquid separator, without shortening the operating cycle Ts of each liquid receiver. By increasing the amount of liquid refrigerant supplied to the gas-liquid separator by a plurality of liquid receivers, large-capacity heat transfer is realized.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG. 1, assuming that there are two liquid receivers. 1 is a heating medium heating device, 2 is a gas-liquid separator provided above the heating medium heating device 1, 3 is an annular passageway in which the heating medium heating device 1 and the gas-liquid separator 2 are connected in an annular manner by piping; 4.4'5.5' is a liquid receiver provided above the gas-liquid separator 2; 5.5' is a first check valve provided in a pipe connecting the liquid receiver 4.4' and the gas-liquid separator 2; 6. 6′
1 is an on-off valve provided in a pressure equalizing pipe 7 connecting the heat medium outlet side of the heat medium heater 1 and the liquid receiver 4.4', 8 is a radiator having a blower 9, and 10 is a gas-liquid separator 2 and a heat radiator. 11.11' is a second check valve provided upstream of the liquid receiver 4.4', and 12 is a heat medium outgoing pipe connecting the radiator 8 and the second check valve 11.11'. A connecting heating medium return pipe, 13 is a burner provided in the heating medium heater 1, 14 is a fuel flow rate control unit to the burner 13, and 15 is installed on the heating medium outlet side of the heating medium heating machine 1 in the annular passage 3. A temperature sensor 16 is a control device electrically connected to the on-off valve 6.6', the temperature sensor 15, and the flow rate control section 14.

In the above configuration, the refrigerant, which is a heating medium heated by the combustion heat of the burner 13 in the heating medium heater 1, flows into the gas-liquid separator 2 in a two-phase state in which gas and liquid are mixed, and the liquid refrigerant is separated into gas and liquid. The heat medium flows into the heat medium heater 1 again from below the vessel 2 . On the other hand, among the two-phase refrigerant that has flowed into the gas-liquid separator 2, the gas refrigerant passes through the heating medium outgoing pipe 10 that is opened in the upper part of the gas-liquid separator 2, and passes through the radiator 8.
Send it to J! II! In operation 9, heat is radiated to the user side, condensed and liquefied, and further becomes supercooled liquid. When at least one of the on-off valves provided in the plurality of liquid receivers 4.4' is closed, the radiator 8
The liquid refrigerant, which has become a supercooled liquid, passes through the heat medium return pipe 12 and enters the liquid receiver 4. which corresponds to either of the closed on-off valves 6.6'.
4' and its corresponding second check valve 11.11'
The gas refrigerant in the receiver is cooled and condensed by the supercooled liquid refrigerant, thereby filling the receiver with liquid refrigerant. Next, the control device 16 opens the on-off valve corresponding to the liquid receiver filled with liquid refrigerant, and the liquid receiver and the gas-liquid separator 2 are communicated through the pressure equalization pipe 7, and the liquid in the liquid refrigerant is The refrigerant is passed through the first check valve by gravity to the gas-liquid separator 2.
Let it flow inside. This inflow and outflow in one liquid receiver is carried out sequentially in other liquid receivers at different times, and gas-liquid separation can be achieved without shortening the time required for one cycle of opening and closing in one liquid receiver. The amount of liquid refrigerant supplied to the container 2 from the liquid receiver can be increased. In addition, by arranging the plurality of liquid receivers 4,4'... above the gas-liquid separator 2, the liquid receivers 4, 4'... .4′・
The liquid refrigerant inside can be allowed to fall and flow in, and the on-off valve 6
．． This has the effect of facilitating opening/closing control of 6'.... Furthermore, since the inflow time to the liquid receiver (closing time Toff of the on-off valve) can be lengthened, the degree of supercooling of the supercooled liquid can be set small, and the heat dissipation capacity of the radiator can be reduced. can be made low-cost and compact.

Effects of the Invention As described above, according to the heat transfer device of the present invention, it is possible to control the opening and closing of a plurality of liquid receivers provided above a gas-liquid separator and a plurality of on-off valves corresponding to the liquid receivers. Because of this, it has the following effects.

(1) It becomes possible to transport a larger amount of heat, increasing the range of application of the system.

(2) A plurality of liquid receivers placed above the gas-liquid separator allows stable supply of liquid refrigerant, improving system reliability.

(3) If the heat transfer capacity is not increased, the radiator can be made smaller and lower in cost.

[Brief explanation of the drawing]

The drawing shows the configuration of a heat transfer device showing an embodiment of the present invention. 1... Heat medium heater, 2... Gas-liquid separator, 3... Annular passage, 4.4'... Liquid receiver, 5. 5'...First check valve, 6.6'...
...Opening/closing valve, 7...Pressure equalization pipe, 8...
Heat radiator, lO... Heat medium outgoing pipe, 11.11'...
...Second check valve, 12... Heat medium return pipe, 16
······Control device.

Claims (1)

[Claims] An annular passage connecting a heat medium heater and a gas-liquid separator provided above the heat medium heater, a plurality of liquid receivers provided above the gas-liquid separator, and each of the liquid receivers and the gas-liquid separator. a plurality of first check valves connecting the heating medium, and a plurality of on-off valves provided in pressure equalizing pipes connecting the heating medium outlet side of the heating medium heater and the plurality of liquid receivers;
a heat medium return pipe that connects the gas-liquid separator and the radiator; a heat medium return pipe that connects the radiator to a plurality of second check valves provided upstream of the plurality of liquid receivers; A heat transfer device equipped with a control device that controls opening and closing of a plurality of on-off valves.