JPH0246853B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat transfer device applied to hot water supply and space heating systems.

Conventional structure and its problems Conventionally, as in Japanese Utility Model Application Publication No. 16067/1983, the upper part of the evaporator and the lower part of the condenser were connected by a single pipe, and the steam generated inside the evaporator was connected. This system transfers heat from the evaporator to the condenser by sending it to the condenser and condensing it, and then recovers the working fluid accumulated in the condenser to the evaporator by reversing the temperature relationship between the evaporator and condenser. It had been proposed. but,
This configuration had the following problems.

(1) In order to collect the working fluid accumulated in the condenser into the evaporator, the heating of the evaporator must be stopped, and if an oil or gas combustor is used as the heating source, the frequency of on/off is reduced. When the situation became more intense, efficiency decreased and more breakdowns occurred.

(2) The temperature relationship between the evaporator and condenser must be reversed, and the heat capacity of the evaporator and condenser is large, so the time required to recover the working fluid is longer than the time required to transfer heat, reducing efficiency. was low.

Purpose of the Invention The present invention solves these conventional problems by reducing the frequency of turning on and off the combustor, which serves as a heating source, and improving reliability, as well as reducing the time it takes to collect the working fluid accumulated in the condenser into the evaporator. The purpose is to shorten the time and improve efficiency.

Structure of the Invention In order to achieve this object, the present invention provides an evaporator for evaporating a working liquid of a latent heat medium, a first liquid storage tank provided above the evaporator, and a reverse arrangement between the bottom of the liquid storage tank and the evaporator. A return pipe that connects via a stop valve, a communication pipe that connects the upper part of the first liquid storage tank and the evaporator via a valve, a condenser installed at a location separate from the evaporator, and a lower part of the condenser. A second liquid storage tank provided in the valve and connected to the first liquid storage tank by a drain pipe, and an outgoing pipe branched from a part of the communication pipe connecting the valve and the first liquid storage tank and connected to the condenser. It is.

With this configuration, when the valve is closed, the working fluid accumulated in the second liquid storage tank can be collected into the first liquid storage tank through the outgoing pipe even if the evaporator continues to be heated. Further, when the valve is opened and the vapor of the working fluid is introduced into the first liquid storage tank, the working liquid accumulated in the first liquid storage tank can be immediately collected into the evaporator.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is the working fluid, 2 is the evaporator, 3 is the first liquid storage tank, 4 is the check valve, 5 is the return pipe, 6 is the valve, 7 is the communication pipe, 8 is the condenser, and 9 is the drain pipe. ,1
0 is a second liquid storage tank, 11 is an outgoing pipe, and 12 is a burner.

In the above configuration, when the evaporator 2 is heated by the burner 12 with the valve 6 open, the working fluid 1 as a latent heat medium inside is evaporated, and the steam flows into the condenser 8 through the communication pipe 7 and the outgoing pipe 11. The liquefied working fluid 1 radiates heat by condensing, and the liquefied working fluid 1 is drained into the drain pipe 9.
The liquid passes through and accumulates in the second liquid storage tank. Therefore, the heat obtained in the evaporator 2 can be transferred to the condenser 8. On the other hand, when the valve 6 is closed, the internal pressure of the first liquid storage tank 3 becomes lower than the internal pressure of the second liquid storage tank 10. 8. The liquid is sucked into the first liquid storage tank 3 through the outgoing pipe 11 and collected. In this state,
When the valve 6 is opened, the vapor of the working fluid 1 is introduced into the first liquid storage tank 3 through the communication pipe 7.
The internal pressures of the liquid storage tank 3 and the evaporator 1 become approximately equal. Therefore, the working fluid 1 in the first liquid storage tank 3 is introduced into the evaporator 2 through the return pipe 5 by gravity.
By repeating the above operations, heat can be transferred by steam and condensate can be recovered. At this time,
If a fluid with a boiling point below room temperature, such as Freon, is used as the working fluid, a sealed circuit must be constructed; however, if a fluid with a boiling point above room temperature, such as water, is used, the second liquid storage tank 10 is used. It is also possible to use it by exposing it to the atmosphere. Furthermore, as a means for automating the opening/closing control of the valve 6, a method of detecting the liquid level of the working fluid 1 in the first liquid storage tank 3 or the evaporator 2 is effective.

Effects of the Invention As described above, the heat transfer device of the present invention provides the following effects.

(1) A first liquid storage tank is provided above the evaporator via a check valve, and a valve is provided in the communication pipe connecting the evaporator and the upper part of the first liquid storage tank, so that the evaporator The working fluid in the second reservoir tank can be collected into the first reservoir tank regardless of the pressure or temperature therein. Therefore, since there is no need to stop the operation of the heat source that heats the evaporator, highly efficient operation can be achieved.

(2) The above configuration eliminates the need for cooling the evaporator as in the conventional case, so the time to recover the working fluid is shortened and highly efficient heat transfer is possible.

(3) Since the combustor, which is the heating source, is turned on and off less frequently, a highly reliable system can be realized.

[Brief explanation of the drawing]

The figure is a configuration diagram of a heat transfer device showing an embodiment of the present invention. 1... Working fluid, 2... Evaporator, 3... First liquid storage tank, 4... Check valve, 5... Return pipe, 6... Valve, 7... Communication pipe, 8... Condenser , 9...Drain pipe, 10...Second liquid storage tank, 11...Outgoing pipe.

Claims (1)

[Claims] 1. An evaporator that evaporates a working liquid of a latent heat medium, a first liquid storage tank provided above the evaporator, and a return pipe that connects the bottom of the liquid storage tank and the evaporator via a check valve. , a communication pipe connecting the upper part of the first liquid storage tank and the evaporator via a valve, a condenser provided at a location apart from the evaporator, and a drain pipe provided below the condenser. a second liquid storage tank connected to the valve and the first liquid storage tank;
A heat transfer device comprising an outgoing pipe that branches from a part of the communication pipe that connects to the liquid storage tank and connects to the condenser.