JPH0759987B2 - heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater that heats a medium and performs heating operation by a non-powered heat transfer system.

2. Description of the Related Art In a conventional heater of this type, as shown in FIG. 2, a gas-liquid separator 3 is arranged at an intermediate position of a receiver 2 located above a medium heater 1, and the receiver 2 and the gas-liquid separator 3 are arranged. A check valve 5 is provided between the receiver 2 and the gas-liquid separator 3, and a check valve 5 is provided between the receiver 2 and the gas-liquid separator 3 so that the medium evaporated by the medium heater 1 is condensed by the indoor heat exchanger 6 and received by the receiver. Inflow to 2. On-off valve 4 when liquid refrigerant accumulates in receiver 2
Is opened to equalize the pressure between the receiver 2 and the gas-liquid separator 3 and allow the liquid refrigerant of the receiver 2 to flow into the gas-liquid separator 3. When the inflow is completed, the on-off valve 4 is closed and the check valve 5 is also closed, so that the liquid refrigerant condensed from the indoor heat exchanger 6 again flows into the receiver 2. By repeating such operations, heat transfer is performed to perform heating operation. (For example, actual exploitation 61-43679
DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, the above-described configuration has the following problems.

1. The medium in the connecting pipe between the medium heater and the gas-liquid separator is natural circulation, and it is necessary to take out from the medium heater in a two-phase state in order to prevent thermal decomposition of the medium. If it is provided above the liquid separator, the pipe resistance in the middle becomes large, and accordingly, the liquid level in the gas-liquid separator also needs to be raised, and the height between the medium heater and the gas-liquid separator becomes large, and the entire device becomes large.

2. If a check valve is installed between the receiver and the gas-liquid separator, the height dimension will increase and the height of the entire device will increase.

3.When the liquid refrigerant accumulated in the receiver is flown into the gas-liquid separator and the open / close valve is open, the open / close valve is opened for equalization with the static pressure component in the gas / liquid separator to flow in due to the gravity difference. It must be set long and the refrigerant circulation rate G (g / sec),
Assuming that the cycle of the on-off valve (open time T ₀ + close time T ₁ ) is T, G = V × γ / T (V: receiver capacity (cc)) (γ: liquid refrigerant density in receiver (g / cc)) When T increases, G decreases and a large heat transfer amount cannot be obtained.

4. When the liquid medium component enters the connecting pipe that goes from the gas-liquid separator to the indoor heat exchanger, the amount Q _{1 of the} medium that flows out from the gas-liquid separator to the indoor heat exchanger and intermittently from the indoor heat exchanger via the receiver. internal or a medium amount Q ₂ to which return to the liquid separator Q _1> becomes the relationship Q ₂ 'reservoir to the medium gradually indoor heat exchanger, the heating operation in the connecting pipe internal pressure to increase the gas-liquid separator to increase abnormally Since a baffle plate or the like must be provided in the above, the gas-liquid separator becomes large and the internal structure becomes complicated, resulting in high cost.

The present invention solves the above-mentioned conventional problems by making the configuration around the medium heater, the gas-liquid separator, and the receiver small and compact, and allowing the liquid refrigerant accumulated in the receiver to flow out in a short time when the on-off valve is opened. An object is to obtain a large heat transfer amount, improve the gas-liquid separator performance with an inexpensive structure, and perform stable heating operation.

Means for Solving the Problems In order to solve the above problems, a heater according to the present invention comprises an indoor heat exchanger, a medium heater, a gas-liquid separator, and a receiver. Individual pipe connection ports are provided, and a mountain-shaped protrusion is formed at the connection port A, and the pipes are connected to the C of the two pipe connection ports C and D provided on the top of the receiver through the on-off valve, and the connection port B is connected to one end of the indoor heat exchanger by piping, and the other end of the indoor heat exchanger is connected to a pipe connection port D on the top of the receiver through the first check valve, and at the bottom of the gas-liquid separator E, Two pipe connection ports of F are provided, the connection port E is connected to the bottom of the medium heater by piping, and the pipe from the top of the medium heater is inserted into the gas-liquid separator via the connection port F,
While opening below the mountain-shaped projection of the pipe connection port A at the top of the gas-liquid separator, from the receiver bottom part to the connection port E at the bottom part of the gas-liquid separator and the medium heater bottom part via the second check valve. Connection pipes are provided between the pipes.

Effect The present invention has the above-described configuration, so that the medium heated by the medium heater flows in the two-phase state from the lower end of the gas-liquid separator into the gas-liquid separator in the shortest distance, so that the pipe resistance can be reduced, and the inside of the gas-liquid separator can be reduced. The liquid level can be made lower than that of the medium heater, and the height of the receiver can be made low, so that the structure around the medium heater, the gas-liquid separator and the receiver can be made compact and compact. Also, when opening the on-off valve and letting out the liquid medium accumulated in the receiver from the receiver,
Since the dynamic pressure component acts from the top of the medium heater into the gas-liquid separator into the receiver, the time until the liquid medium completely flows out from the receiver can be shortened and a large amount of heat transfer can be obtained. . Furthermore, the liquid medium of the two-phase medium flowing out from the top of the medium heater into the gas-liquid separator by the mountain-shaped protrusions on the top of the gas-liquid separator travels along the wall surface of the mountain-shaped protrusions and falls into the gas-liquid separator, and the on-off valve is opened. When opened, the performance of the gas-liquid separator can be improved without losing the dynamic pressure component in the receiver, and only the gas medium flows to the indoor heat exchanger, and it is possible to prevent the pipe pressure from rising abnormally during heating operation. .

Embodiment One embodiment of the present invention will be described below with reference to FIG.
The same members as those in FIG. 2 are designated by the same reference numerals.

In FIG. 1, 1 is a mountain-shaped protrusion having a connection port A8 at the top.
10 and a connection port B9, and a connection port E13 and a connection port F14 on the bottom.
It is a medium heater arranged below the gas-liquid separator 3 having. The gas-liquid separator 3 and the medium heater 1 connect a heater inlet pipe 15 that connects the bottom of the medium heater 1 and the connection port E13, and the top of the medium heater 1 and the connection port F14.
Is connected in a loop with a heater outlet pipe 16 that connects with, and the heater outlet pipe 16 is inserted into the gas-liquid separator 3 and the tip opening has a mountain-shaped projection having the connection port A8. At the bottom of part 10. Reference numeral 2 denotes a receiver which is disposed above the gas-liquid separator 3 and has a connection port C11 and a connection port D12 at the top, and the connection port C11 is evenly arranged via the connection port A8 of the mountain projection 10 and the on-off valve 4. It is connected by a pressure pipe 17. On the other hand, the connection port D12 is pipe-connected to one end of the indoor heat exchanger 6 via the first check valve 7, and the other end of the indoor heat exchanger is pipe-connected to the connection port B at the top of the gas-liquid separator 3. . The bottom of the receiver 2 is connected to the heater inlet pipe 15 via the second check valve 5.
It is connected to.

In the above configuration, the medium heated by the medium heater 1 flows into the gas-liquid separator 3 through the heater outlet pipe 16 in a two-phase state, and the liquid medium travels along the wall surface of the mountain-shaped protrusion 10 and enters the gas-liquid separator 3. It drops and again flows into the medium heater 1 through the heater inlet pipe 15. On the other hand, in the gas-liquid separator 3, the medium heater 1
The gas component of the two-phase medium that has flowed in from the connection port B9 is pressure-fed to the indoor heat exchanger 6 to be condensed and liquefied. At this time, when the opening / closing valve 4 is closed, the second 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 first check valve 7 and the gas in the receiver 2 is discharged. The medium is condensed and liquefied, the pressure in the receiver 2 is drastically lowered, the supercooled liquid medium in the indoor heat exchanger 6 is drawn into the receiver 2, and the inside of the receiver 2 is filled with the condensed liquid medium from the indoor heat exchanger 6. When the on-off 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 second check valve 5 to the medium heater 1 from the heater inlet pipe 15. Inflow. At this time, the first check valve 7 is closed. Next, when the on-off valve 4 is closed, the second
The check valve 5 is 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 condensed liquid medium and open the on-off valve 4. This cycle is repeated. That is, the natural circulation cycle between the gas-liquid separator 3 and the medium heater 1, the gas-liquid separator 3, the indoor heat exchanger 6, the first check valve 7,
The cycle of the receiver 2 and the second check valve 5 is an intermittent operation cycle in which the supercooled liquid medium from the indoor heat exchanger 6 is stored in the receiver 2 and is intermittently supplied to the medium heater 1. Here, since the outlet pipe of the medium heater 1 is inserted from the bottom of the gas-liquid separator 3, the pipe resistance of the heater outlet pipe 15 becomes smaller than before, and as a result, the liquid level of the medium heater 1 and the gas-liquid separator 3 becomes lower. The height of the medium heater 1 and the gas-liquid separator 3 can be lowered.
Further, as is clear from the explanation of the operation, the receiver 2 must be arranged at a position higher than the gas-liquid separator 3, but since the second check valve 5 is connected to the heater inlet pipe 15, the conventional gas is not supplied. The size is smaller than the simple addition size of the liquid separator 3, the second check valve 5, and the receiver 2, and the height from the medium heater 1 to the receiver 2 can be reduced, and the size and the size can be reduced. Further, since the opening of the heater outlet pipe 16 is arranged below the pressure equalizing pipe 17, the opening time of the on-off valve 4 when the liquid medium of the receiver 2 is supplied to the medium heater 1 is set to the inside of the receiver 2. Since a dynamic pressure component is applied, it can be shortened as compared with the conventional one, and as a result, a large heat transfer amount can be obtained. Further, since the opening portion of the heater outlet pipe 15 is provided in the mountain-shaped projection portion 10, it is possible to prevent
The liquid medium of the phase medium travels along the wall surface of the mountain-shaped projection and drops downward, and it is an inexpensive method that does not use a baffle plate as in the conventional method and does not impair the dynamic pressure component in the receiver 2 when the on-off valve 4 is opened. The gas-liquid separation performance can be improved, and stable heating operation can be performed without an abnormal rise in pressure.

EFFECTS OF THE INVENTION As described above, according to the present invention, there is an effect that the height dimension up to the medium heater and the receiver can be reduced, and the entire device can be made compact and compact. Further, when the medium is supplied from the receiver to the medium heater, the dynamic pressure component of the medium heater outlet pipe is added to the inside of the receiver, so that the medium can be supplied in a short time and the heat transfer amount can be increased. Furthermore, since a mountain-shaped projection is provided on the top of the gas-liquid separator and the opening of the medium heater outlet pipe is arranged below it, the gas-liquid separation performance can be improved by an inexpensive method and without impairing the dynamic pressure component. There is an effect that a stable heating operation can be performed without an abnormal rise in temperature.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a heater according to an embodiment of the present invention,
FIG. 2 is a circuit configuration diagram of a conventional heater. 1 ... Medium heater, 2 ... Receiver, 3 ... Gas-liquid separator, 4 ... Open / close valve, 5 ... Second check valve, 6 ... Indoor heat exchanger, 7 ... First check valve , 8 ... Aperture A, 9 ... Aperture B, 10 ... Mountain-shaped projections, 11 ... Aperture C, 12 ... Aperture D, 13 ... Aperture E, 14 ... Aperture F .

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Jakudo 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Koichiro Yamaguchi, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. An indoor heat exchanger, a medium heater, a gas-liquid separator, and a receiver.
The second pipe connection port is provided, the first pipe connection port is formed with a mountain-shaped protrusion, and the opening / closing valve is provided at the third pipe connection port of the third and fourth pipe connection ports provided at the top of the receiver. The second pipe connection port is connected to one end of the indoor heat exchanger by pipe connection, and the other end of the indoor heat exchanger is connected by the first check valve to the fourth pipe at the top of the receiver. In addition to piping to the connection port, 5th and 6th piping connection ports are provided at the bottom of the gas-liquid separator, the 5th piping connection port is connected to the bottom of the medium heater, and the pipe from the top of the medium heater is connected. Is inserted into the gas-liquid separator through the sixth pipe connection port, and is opened at the bottom of the mountain-shaped projection of the first pipe connection port at the top of the gas-liquid separator and at the second from the bottom of the receiver. Connected to the pipe between the fifth pipe connection port at the bottom of the gas-liquid separator and the bottom of the medium heater via the check valve. Heating machine.