JPH0783454A - Heat carrier - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a device for obtaining a larger heat transfer amount in a heat transfer device by a non-powered heat transfer system by heating a medium. [Structure] A medium heater 1, a gas-liquid separator 3, a receiver 2, and an indoor heat exchanger 6 are provided. A heater outlet pipe 17 from the top of the medium heater 1 is connected to the top of the receiver 2 via an on-off valve 4. A pressure equalizing pipe 18 is arranged at the top of the gas-liquid separator 3 from the middle of the heater outlet 17 while being connected, and the heater outlet pipe 17 is directly connected to the top of the receiver 2 without passing through the gas-liquid separator 3. Therefore, when the on-off valve 4 is opened and the liquid medium accumulated in the receiver 2 flows out, more dynamic pressure components act on the receiver 2 and the time until the liquid medium flows into the gas-liquid separator 3 can be shortened. As a result, a larger heat transfer amount can be obtained.

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 which heats a medium to perform heating operation by a non-powered heat transfer method.

[0002]

2. Description of the Related Art Conventionally, in this type of heat transfer device, a gas-liquid separator 3 is arranged at an intermediate position of a receiver 2 located above a medium heater 1 as shown in FIG.
And a check valve 5 connecting the bottom of the receiver 2 and the top of the gas-liquid separator 3 is provided. Medium heater 1
The medium evaporated in (1) is condensed in the indoor heat exchanger 6 and flows into the receiver 2 via the second check valve 7. When the liquid medium accumulates in the receiver 2, the on-off valve 4 is opened, the receiver 2 and the gas-liquid separator 3 are pressure-equalized, and the liquid medium in the receiver 2 flows into the gas-liquid separator 3 via the check valve 5. When the inflow is completed, the on-off valve 4 is closed and the check valve 5 is also closed, so that the liquid medium condensed from the indoor heat exchanger 6 is again flowed into the receiver 2. Such an operation is repeated to carry the heat by the medium to perform the heating operation.

[0003]

However, the conventional structure as described above has the following problems.

Since the liquid medium accumulated in the receiver 2 is equalized with the static pressure component in the gas-liquid separator 3 and flows in due to the difference in gravity, the opening time of the on-off valve 4 must be set long and the medium circulation amount. Let G (g / sec) and the cycle of the on-off valve 4 (open time T ₀ + close time T ₁ ) be T: G = V × γ / T (V: receiver volume (cc)) (γ: liquid in receiver When T increases from the medium density (g / cc), G decreases and a large heat transfer amount cannot be obtained.

Further, in order to shorten the inflow time and obtain a large heat transfer amount, it is sufficient to simply position the receiver 2 further upward and raise the liquid level, but the height between the receiver 2 and the gas-liquid separator 3 should be high. Becomes larger and the entire device becomes larger.

The present invention solves the above-mentioned conventional problems. When the on-off valve is opened, the liquid medium of the receiver is allowed to flow into the gas-liquid separator in a short time to obtain a large amount of heat transfer and the receiver. The purpose is to make the configuration of the gas-liquid separator in the height direction small and compact.

[0007]

In order to achieve the above object, a heat transfer device of the present invention comprises a medium heater, a gas-liquid separator disposed above the medium heater, and a gas-liquid separator of the medium-heater. A receiver arranged further upward, an upper space part in the gas-liquid separator and the receiver are piped through an indoor heat exchanger, and a check valve connecting the receiver bottom part and the gas-liquid separator top part, It consists of a heater inlet pipe connecting the bottom of the liquid separator and the bottom of the medium heater, and a heater outlet pipe from the top of the medium heater, the heater outlet pipe being connected to the receiver top via an on-off valve. At the same time, a pressure equalizing pipe is formed in the middle thereof, and the pressure equalizing pipe is arranged on the top of the separator.

The cross-sectional area of the heater outlet pipe connected from the top of the medium heater to the top of the receiver via the on-off valve is more than the cross-sectional area of the pressure equalizing pipe disposed on the top of the gas-liquid separator from the middle thereof. It is configured to be large.

[0009]

According to the present invention, since the heater outlet pipe from the top of the medium heater is directly connected to the receiver top without passing through the gas-liquid separator by the above-described structure, the on-off valve is opened and accumulated in the receiver. When the liquid medium flows out, more dynamic pressure components act in the receiver, and the time required for the liquid medium to completely flow into the gas-liquid separator from the receiver can be shortened.
As a result, a larger heat transfer amount can be obtained. Also, because it can flow into the gas-liquid separator in the shortest time,
The configuration of the receiver and the gas-liquid separator in the height direction can be made compact and compact.

Further, since the cross-sectional area of the heater outlet pipe from the top of the medium heater is made larger than the cross-sectional area of the pressure equalizing pipe disposed on the top of the gas-liquid separator from the middle thereof, the dynamic pressure component is Since it is possible to effectively act on the receiver a lot, similarly, the time until the liquid medium flows into the gas-liquid separator can be surely shortened, and a large heat transfer amount can be stably obtained.

[0011]

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

In FIG. 1, reference numeral 1 is a medium heater, a receiver 2 is provided above the medium heater 1, and a gas-liquid separator 3 is provided at an intermediate position between the receiver 2 and the medium heater 1. Has been done. The top of the gas-liquid separator 3 has a connection port A8 for connecting the bottom of the receiver 2 via the check valve 5, and a connection port B9, and the bottom has a connection port C8.
10 and the connection port D11. Also, the receiver 2
Has a connection port E12 and a connection port F13, respectively.

The gas-liquid separator 3, the indoor heat exchanger 6 and the receiver 2 are connected to each other by a connection port C at the bottom of the gas-liquid separator 3.
The indoor unit inlet pipe 14 that connects 10 to one end of the indoor heat exchanger 6, and the other end of the indoor heat exchanger 6 and the connection port E12 at the top of the receiver 2 through the second check valve 7. The indoor unit inlet pipe 14 is inserted into the gas-liquid separator 3, and the tip opening is provided in the space 15 above the liquid surface.

The gas-liquid separator 3 and the medium heater 1 are connected by a heater inlet pipe 16 between the connection port D11 at the bottom of the gas-liquid separator 3 and the bottom of the medium heater 1. The heater outlet pipe 17 from the top of 1 is connected to the connection port F13 of the top of the receiver 2 via the on-off valve 4 without passing through the gas-liquid separator 3, and a pressure equalizing pipe 18 is formed from the middle of the connection port F13. The pressure equalizing pipe 18 is inserted into the connection port B9 at the top of the gas-liquid separator.

In the above structure, the medium heated by the medium heater 1 is in a two-phase state and the heater outlet pipe 17 and the pressure equalizing pipe 18 are provided.
And flows into the gas-liquid separator 3, where the liquid medium drops into the gas-liquid separator 3 and again into the heater inlet tube 1
It flows into the medium heater 1 through 6.

On the other hand, the medium heater 1 is provided in the gas-liquid separator 3.
The gas medium in the two-phase state flowing from the
Is pressure-fed to the indoor heat exchanger 6 for heat exchange and condensation and liquefaction. At this time, when the on-off valve 4 is closed, the check valve 5 is closed, and the supercooled liquid medium from the indoor heat exchanger 6 is pressure-fed to the receiver 2 through the second check valve 7 and the inside of the receiver 2 is closed. Gas medium is condensed and liquefied, the pressure in the receiver 2 is rapidly reduced, the supercooled liquid medium in the indoor heat exchanger 6 is drawn into the receiver 2, and the inside of the receiver 2 is condensed from the indoor heat exchanger 6. Filled with liquid medium. When the open / close valve 4 is opened in this state, the receiver 2 and the gas-liquid separator 3 are in a pressure equalizing state, and the liquid medium in the receiver 2 passes through the check valve 5 and passes through the gas-liquid separator 3.
Flow into. At this time, the second check valve 7 is closed.

Next, when the open / close valve 4 is closed, the check valve 5 is also closed, and the supercooled liquid medium flows into the receiver 2 from the indoor heat exchanger 6 again to fill the receiver 2 with the condensate liquid medium. Repeat the cycle of opening 4. That is,
The natural circulation cycle between the gas-liquid separator 3 and the medium heater 1, the cycle of the gas-liquid separator 3, the indoor heat exchanger 6, the second check valve 7, the receiver 2 and the check valve 5 is the indoor heat to the receiver 2. This is an intermittent operation cycle in which the supercooled liquid medium from the exchanger 6 is accumulated and is intermittently supplied to the gas-liquid separator 3.

Here, since the heater outlet pipe 17 from the top of the medium heater 1 was directly connected to the top of the receiver 2 without passing through the gas-liquid separator 3, the on-off valve 4 was opened and accumulated in the receiver 2. When the liquid medium flows out, more dynamic pressure components act in the receiver 2, and the time required for the liquid medium to completely flow into the gas-liquid separator 3 from the receiver 2 can be shortened.
As a result, a larger heat transfer amount can be obtained. Further, since the gas can flow into the gas-liquid separator 3 in the shortest time, the configuration of the receiver 2 and the gas-liquid separator 3 in the height direction can be made small and compact.

Next, another embodiment of the present invention will be described with reference to FIG. 1 is different from the above embodiment in that the cross sectional area of the heater outlet pipe 17 connected from the top of the medium heater 1 to the pipe connection port F13 at the top of the receiver 2 via the on-off valve 4 It is configured to be larger than the cross-sectional area of the pressure equalizing pipe 18 arranged in the pipe connection port B9 at the top of the gas-liquid separator 3. According to this configuration, a large amount of dynamic pressure component acts effectively on the receiver 2. Therefore, similarly, there is an effect that the time until the liquid medium flows into the gas-liquid separator 3 can be surely shortened and a large heat transfer amount can be stably obtained.

[0020]

As described in the above embodiments, the heat transfer device of the present invention has the following effects.

(1) Since the heater outlet pipe from the top of the medium heater is directly connected to the receiver top without passing through the gas-liquid separator, when the liquid medium accumulated in the receiver is opened by opening the on-off valve, More dynamic pressure components act in the receiver, and the time until the liquid medium completely flows into the gas-liquid separator from the receiver is shortened, and as a result, a large heat transfer amount is obtained. Further, since it can flow into the gas-liquid separator in the shortest time, the height configuration of the receiver and the gas-liquid separator can be made compact and compact.

(2) Moreover, the cross-sectional area of the heater outlet pipe is made larger than the cross-sectional area of the pressure equalizing pipe disposed in the gas-liquid separator from the middle thereof, and the dynamic pressure component effectively acts on the receiver in a large amount. Therefore, a large amount of heat transfer can be stably obtained.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a heat transfer device according to an embodiment of the present invention.

FIG. 2 is a circuit configuration diagram of a conventional heat transfer device.

[Explanation of symbols]

 1 medium heater 2 receiver 3 gas-liquid separator 4 on-off valve 5 check valve 6 indoor heat exchanger 7 second check valve 15 upper space 16 heater inlet pipe 17 heater outlet pipe 18 pressure equalizing pipe

Claims (2)

[Claims] 1. A medium heater, a gas-liquid separator arranged above the medium heater, a receiver arranged further above the gas-liquid separator, an upper space portion inside the gas-liquid separator, and Piping a receiver through an indoor heat exchanger, a check valve connecting the receiver bottom and the gas-liquid separator top, a heater inlet pipe further connecting the gas-liquid separator bottom and the medium heater bottom, and medium heating It consists of a heater outlet pipe from the top of the vessel, the heater outlet pipe is connected to the receiver top through an on-off valve, and constitutes a pressure equalizing pipe from the middle thereof, and this pressure equalizing pipe is connected to the separator top. A heat transfer device provided. 2. The cross-sectional area of the heater outlet pipe connected to the receiver top from the top of the medium heater via an on-off valve is:
2. The heat transfer device according to claim 1, wherein the heat transfer device is configured to be larger than the cross-sectional area of the pressure equalizing pipe disposed on the top of the gas-liquid separator midway.