JPH0759988B2 - 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 for equalizing the pressure between the two, and a check valve 5 is provided between the receiver 2 and the gas-liquid separator 3 so that the medium evaporated in the medium heater 1 is condensed in the indoor heat exchanger 6 and received. 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 a natural circulation, and in order to prevent thermal decomposition of the medium, the medium heater outlet must be a two-phase medium, but the medium heater outlet When the pipe is connected to the upper part of the gas-liquid separator, the gas-liquid separator is located above the medium heater, so the number of bends in the middle pipe increases and the pipe resistance increases, so the liquid level in the gas-liquid separator also needs to be high. The height between the heater and the gas-liquid separator becomes large, and the entire device becomes large.

2. Since the liquid refrigerant accumulated in the receiver is equalized with the static pressure component in the gas-liquid separator and flows in due to the gravity difference, the opening time of the on-off valve must be set long and the refrigerant circulation amount G (g / g se
c) and 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 )) As T increases, G decreases and a large heat transfer amount cannot be obtained.

3. When the liquid medium component enters the connection pipe that goes from the gas-liquid separator to the indoor heat exchanger, the amount Q _{1 of the} medium that goes out from the gas-liquid separator to the indoor heat exchanger and intermittently from the indoor heat exchanger through the receiver. or a medium amount Q ₂ to which return to the gas-liquid separator reservoir to Q _1> medium becomes the relation Q ₂ 'is 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 inside, the gas-liquid separator becomes large and the internal structure becomes complicated, resulting in high cost.

The present invention is to solve the above-mentioned conventional problems, and makes the configuration of the medium heater and the gas-liquid separator in the height direction small and compact, and when the open / close valve is open, the liquid refrigerant flows out to the gas-liquid separator in a short time. By doing so, it is possible to obtain a large heat transfer amount and improve the gas-liquid separator performance with an inexpensive structure to perform stable heating operation.

Means for Solving the Problems 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. C3 pipe connection ports are provided, and a mountain projection is formed at the connection port A, and one of D and E2 pipe connection ports provided at the top of the receiver is piped through the on-off valve and connected. The port B is connected to the bottom of the receiver via the first check valve, the connection port C is connected to one end of the indoor heat exchanger, and the other end of the indoor heat exchanger is connected via the second check valve. In addition to piping to the connection port E on the top of the receiver, F and G2 pipe connection ports are provided on the bottom of the gas-liquid separator, the connection port F is connected to the bottom of the medium heater, and also from the top of the medium heater. The pipe is inserted into the gas-liquid separator through the connection port G, and the lower part of the mountain-shaped protrusion of the connection port A at the top of the gas-liquid separator. In which it opens composed.

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 minimum liquid level height that guarantees the two-phase state can be made lower than that of the medium heater, and the configuration of the medium heater and the gas-liquid separator in the height direction can be made compact and compact. Also, when the liquid medium accumulated in the receiver is flown out from the receiver by opening the on-off valve, the dynamic pressure component acts from the pipe inserted from the top of the medium heater into the gas-liquid separator into the receiver, so that the receiver completes. In addition, the time until the liquid medium flows out to the gas-liquid separator can be shortened and a large heat transfer amount can be obtained. Further, 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 projections on the gas-liquid separator top travels along the wall surface of the mountain-shaped projections and falls into the gas-liquid separator. When it is opened, the performance of the gas-liquid separator can be improved without losing the dynamic pressure component in the receiver 2, and only the gas medium flows to the indoor heat exchanger, and the pipe pressure rises abnormally during the heating operation. Preventable and stable heating operation can be performed.

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.
11 has a connection port B9 for connecting the bottom of the receiver 2 via the first check valve 5, and a connection port C10 for connection piping with one end of the indoor heat exchanger 6, and has a connection port F14 and a connection port on the bottom. The medium heater is arranged below the gas-liquid separator 3 having G15, and the receiver 2 is arranged above the gas-liquid separator 3. The gas-liquid separator 3 and the medium heater 1
Is a heater inlet pipe 16 that connects the bottom of the medium heater 1 to the connection port F14, and the top of the medium heater 1 and the connection port.
It is connected in a loop with a heater outlet pipe 17 that connects to G15. The heater outlet pipe 17 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. At the top of the receiver 2,
A connection port D12 for connecting the pressure equalizing pipe 18 from the connection port A8 via the opening / closing valve 4 and a connection port E13 for connecting the other end of the indoor heat exchanger 6 via the second check valve 7 are provided.

In the above configuration, the medium heated by the medium heater 1 flows into the gas-liquid separator 3 through the heater outlet pipe 17 in a two-phase state, and the liquid medium travels along the wall surface of the mountain-shaped protrusion 11 and enters the gas-liquid separator 3. It drops and again flows into the medium heater 1 through the heater inlet pipe 16. 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 C10 is pressure-fed to the indoor heat exchanger 6 to be condensed and liquefied. At this time, when the on-off valve 4 is closed, the first 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 gas in the receiver 2 is discharged. The medium is condensed and liquefied, and the pressure in the receiver 2 is drastically reduced.
Filled with condensate medium from. 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 flows into the gas-liquid separator 3 through the first check valve 5. At this time, the second check valve 7 is closed. Next, when the on-off valve 4 is closed, the first 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 cycle of the gas-liquid separator 3, the indoor heat exchanger 6, the second check valve 7, the receiver 2, and the first check valve 5 to the receiver 2. This is an intermittent operation cycle in which the supercooled liquid medium from the indoor heat exchanger 6 is accumulated and is intermittently supplied to the gas-liquid separator 3. Here, since the outlet pipe of the medium heater 1 is inserted into the gas-liquid separator 3 from the bottom, the pipe resistance of the heater outlet pipe 17 becomes smaller than before, and as a result, the outlet medium of the medium heater 1 is guaranteed as a two-phase flow. The liquid level in the gas-liquid separator 3 can be lowered, and the configuration in the height direction of the medium heater 1 and the gas-liquid separator 3 can be made compact and compact. Also, heater outlet pipe 17
Since the opening is provided below the mountain-shaped projection 11 of the connection port A8 to which the pressure equalizing pipe 18 is connected, the opening / closing valve 4 is opened and closed when the liquid medium of the receiver 2 is supplied to the gas-liquid separator 3. Since the dynamic pressure component is applied to the inside of the receiver 2, it can be shortened as compared with the conventional one, and as a result, a large heat transfer amount can be obtained. Further heater outlet pipe
Since the fifteen openings are provided in the mountain-shaped protrusions 11, the liquid medium of the two-phase medium from the medium heater 1 travels along the wall surface of the mountain-shaped protrusions 11 and drops downward, so that the baffle plate is removed as in the conventional case. The gas-liquid separator 3 can be provided in a small size and at a low cost without providing the gas-liquid separator 3, and the gas-liquid separation performance can be improved without impairing the dynamic pressure component into the receiver 2 when the opening / closing valve 4 is opened, and stable heating without an abnormal rise in pressure It becomes possible to drive.

Effects of the Invention As described above, according to the present invention, there is an effect that the height dimension between the medium heater and the gas-liquid separator can be reduced and the entire device can be made compact and compact. Also, when the medium is supplied from the receiver to the gas-liquid separator, 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, thus improving the heating capacity. Is possible. 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,
There is an effect that the gas-liquid separation performance can be improved without impairing the dynamic pressure component in the receiver when the on-off valve is opened, and stable heating operation can be performed without an abnormal increase in pressure by an inexpensive means.

[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 ... First check valve, 6 ... Indoor heat exchanger, 7 ... Second check valve , 8 ...... Connection port A, 9 ...... Connection port B, 10 ...... Connection port C, 11 ...... Mountain projection, 12 ...... Connection port D, 13 ...... Connection port E, 14 ...... Connection port F , 15 …… Connection port G.

Front page continuation (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. First, second, and third pipe connection ports are provided on the top of the gas-liquid separator, and the first pipe connection is provided. A mouth-shaped protrusion is formed on the mouth, and the fourth
The fourth pipe connection port of the fifth pipe connection ports is connected to the bottom of the receiver via the on-off valve, the second pipe connection port is connected to the bottom of the receiver via the first check valve, and the third pipe connection is connected. The mouth is connected to one end of the indoor heat exchanger, and the second end is connected to the other end of the indoor heat exchanger.
Piping to the fifth pipe connection port on the top of the receiver via the check valve, and providing the sixth and seventh pipe connection ports on the bottom of the gas-liquid separator, and the sixth pipe connection port to the bottom of the medium heater. The pipe from the top of the medium heater is inserted into the gas-liquid separator via the seventh pipe connection port, and the mountain-shaped protrusion of the first pipe connection port on the top of the gas-liquid separator is inserted. A heater that opens at the bottom.