JPH01155162A - Refrigerant converging instrument for evaporator - Google Patents

Abstract

PURPOSE: To ensure a stabilized evaporation capacity by an arrangement wherein a superconductor fixed to the inner wall face exhibits diamagnetism when flow rate of refrigerant is unbalanced among respective circuits in an evaporator to move an orifice through repellence acting on the orifice and to correct flow rate of refrigerant by regulating the circuits thus keeping the temperature of refrigerant flowing into a combiner at a substantially constant level. CONSTITUTION: A significant temperature difference appears between refrigerants B1 and B2 when the flow rate thereof is unbalanced. When flow rate of B1 is higher, a sufficient superheating can not be ensured for the B1 at the circuit outlet on the evaporator 14a side. Since temperature of the B1 flowing into the flow-in port 9a of a refrigerant combiner 8 lowers, a superconductor 13a exhibits diamagnetism to move an orifice 11 toward a flow-in port 9b through repellence F acting on a magnetic body 12a thus widening the channel on the B2 side and reducing difference of flow rate between B1 and B2. Since flow rate of B1 and B2 flowing through two circuits 14a, 14b of the evaporator 14 is balanced, evaporation capacity is stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a refrigerant merger for an evaporator of an air conditioner, a refrigeration equipment, etc., which allows refrigerant to flow uniformly.

Conventional technology In recent years, refrigerant combiners have been used more and more in order to cope with the need for multiple circuits due to the reduction in the diameter of heat exchanger tubes in heat exchangers.
Its importance is increasing.

Hereinafter, the conventional refrigerant merger mentioned above will be explained with reference to the drawings.

FIG. 5 shows a cross-sectional shape of a conventional refrigerant merger, and FIG. 6 shows a refrigerant circuit in which the refrigerant merger of FIG. 5 is connected to an evaporator. In FIGS. 5 and 6, 1 is a refrigerant merger, and 2 is a hollow body forming the outer shell of the refrigerant merger 1, and is provided with a plurality of inlets 3 and a single outlet 4. 5 is an evaporator, 6 is a refrigerant divider, and the refrigerant divider 6 divides the refrigerant circuit into two circuits, forming two circuits 5a.

5b, and the two circuits after leaving the evaporator 5 are merged into one circuit at the refrigerant merger 1.

Regarding the refrigerant merger configured as above, the sixth section will be described below.
The operation will be explained using figures.

Refrigerant A is divided into refrigerant A1 and refrigerant A2 by a refrigerant flow divider 6. Next, the refrigerant A1 and the refrigerant A2 flow into the evaporator 5, and the refrigerant A1 and the refrigerant A2 respectively flow through the i? 85a and 5b exchange heat for complete steaming. Further, the refrigerant A1 and the refrigerant A2 that have exited the evaporator 5 are combined in the refrigerant merger 1, and flow out as one circuit.

Problems to be Solved by the Invention However, in the above configuration, a refrigerant flow divider 6 with a poor flow ratio is used, and the flow inside the evaporator 5 is reduced. 85a
If the circuit lengths and load balance between the refrigerants A1 and A2 are not equal, the flow rates of the refrigerants A1 and A2 will not be equal, resulting in a problem that the evaporation capacity of the evaporator 5 will be reduced.

In view of the problems described in item 2, the present invention has been developed so that even if a refrigerant divider with a poor distribution ratio is used, or the circuit length or load balance in the evaporator is poor, the refrigerant state in each circuit at the evaporator outlet can be almost maintained. The present invention provides a refrigerant combiner that maintains the same evaporation capacity and provides stable evaporation capacity.

Means for Solving the Problems In order to solve the second problem, the refrigerant combiner of the present invention has the following features:
A hollow body comprising a hollow body having a plurality of inlets and a single outlet, and an orifice made of a magnetic material, wherein the orifice operates in a direction perpendicular to the flow of refrigerant within the hollow body, and the orifice is in contact with the flow of the refrigerant during operation. It has a structure in which a superconductor is provided on the inner wall surface of the body.

Effect of the present invention -1- With the configuration described above, when the refrigerant flow rate in each circuit in the evaporator is unbalanced and the refrigerant temperature in any of the circuits flowing into the refrigerant combiner falls below a certain level, the inner wall surface of the hollow body The superconductor attached to the refrigerant becomes diamagnetic and generates a repulsive force with the magnetic material that makes up the orifice, causing the orifice to move and correct the refrigerant flow balance by narrowing the circuit on the side where the refrigerant temperature has decreased. However, the temperature of the refrigerant in each circuit flowing into the confluencer is kept approximately the same, and stable evaporation capacity can be obtained.

EXAMPLE Hereinafter, a refrigerant merger according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a cross-sectional shape of a refrigerant combiner in one embodiment of the present invention, and FIG. 2 shows a refrigerant circuit in which the refrigerant combiner of FIG. 1 is connected to an evaporator. In Figures 1 and 2,
7 is a refrigerant merger, and 8 is a hollow body forming the outer shell of the refrigerant merger 7, and is provided with a plurality of inlets 9 and a single outlet 10. A movable orifice 11 is provided in the hollow body 8 and is made of a magnetic material 12. Moreover, the orifice 1
A superconductor 13 is provided on the inner wall surface of the hollow body 8 in contact with the superconductor 1 . Furthermore, 14 is an evaporator, 15 is a refrigerant divider, and the refrigerant circuit is divided into two circuits by the refrigerant divider 15, and two circuits 14a,
14b, and the two circuits after leaving the evaporator 14 are merged into one circuit at the refrigerant combiner 7.

Regarding the refrigerant merger configured as above, the second
The operation will be explained with reference to FIGS.

The refrigerant B is divided into two circuits, refrigerant B1 and refrigerant B2, by the refrigerant flow divider 15.
It can be divided into Next, the refrigerant B1 and refrigerant B2 are transferred to the evaporator 14.
into circuits 14a and 14 in evaporator 14, respectively.
The heat of evaporation is exchanged in b. Further, the refrigerant B1 and the refrigerant B2 that have exited the evaporator 14 are combined in the refrigerant merger 7, and flow out as one circuit.

At this time, when the flow rate balance of refrigerant B1 and refrigerant B2 in each circuit 14a and 14b of the evaporator 14 is good,
Since the temperatures of refrigerant B1 and refrigerant B2 at the outlet of the evaporator 14 are approximately equal and maintain a constant refrigerant superheating region temperature, the superconductor 13 provided on the inner wall surface of the hollow body 8 does not generate diamagnetic properties and is able to interact with the orifice 11. No force acts between them, and the orifice 11 is located approximately in the center of the hollow body 8, and the refrigerant B1 and the refrigerant B
Pour 2 evenly.

Further, when the flow rate balance of refrigerant B1 and refrigerant B2 in each circuit 14a and 14b of the evaporator 14 is poor, a large difference occurs in the temperature of refrigerant B1 and refrigerant B2 at the outlet of the evaporator 14, and as shown in FIG. When the flow rate of B1 is large, the degree of superheating of the refrigerant B1 at the 14a side circuit outlet of the evaporator 14 cannot be maintained, and the temperature of the refrigerant B1 flowing into the inlet 9a side of the refrigerant combiner 8 decreases, so that the superconductor 13a becomes diamagnetic, generates a repulsive force F with the magnetic body 12a, and the orifice 11 moves toward the inlet port 9b. As a result, the refrigerant B1
The flow path on the side is pinched, and the flow path on the refrigerant B2 side is widened, working to reduce the difference in flow rate between the refrigerant B1 and the refrigerant B2. Conversely, when the flow rate of the refrigerant 132 is large as shown in FIG. 4, 14 b i! The degree of superheating of the refrigerant B2 at the l'1 circuit outlet cannot be removed, and the refrigerant combiner 8
Inflow [Due to the temperature of refrigerant B2 flowing into the LIQb side decreasing, superconductor 13b becomes diamagnetic, and a repulsive force F is generated between the superconductor 13b and the magnetic material 12b, causing orifice 11 to
As a result, the flow path on the refrigerant B2 side is pinched,
The flow path on the side of the refrigerant B1 is widened, which works to reduce the difference in flow rate between the refrigerant B1 and the refrigerant B2.

As described above, according to this embodiment, the hollow body 7 includes a plurality of inlets 9 and a single outlet 10, and the orifice 11 includes a magnetic material 12, and the orifice 11 is located inside the hollow body 8. By connecting the refrigerant merger 7 to the refrigerant outlet side of the evaporator 14, which operates in a direction perpendicular to the flow of the refrigerant and has a superconductor 13 on the inner wall surface of the hollow body 8 that the orifice 11 contacts during operation. The flow balance of the refrigerant B1 and the refrigerant B2 flowing through the two circuits 14a and 14b of the evaporator 14 can be kept almost equal, and stable evaporation capacity can be obtained.

Note that 5rBaY is a material that exhibits superconductivity near room temperature.
Cu307-δ is known. During production, first the raw material powder is crushed and mixed. It is baked at 920°C in air for 5 hours, then crushed, and the process is repeated three times.
The powder is shaped, sintered at 1000°C in air (1), and cooled in a furnace. The sintered body produced in this way has 3
Shows superconductivity at 38K (65°C) (Ihara et al., Japanese Journal of Applied Physics)
APPLIED PHYS LC3) Vo I,
26. No. 8° August, 1,987. PP167
171).

Effects of the Invention As described above, the present invention includes a hollow body consisting of a plurality of inlets and a single outlet, and an orifice made of a magnetic material, and the orifice is arranged in the hollow body in a direction perpendicular to the flow of refrigerant. By providing a superconductor on the inner wall surface of the hollow body that is in operation and in contact with the orifice during operation, the refrigerant temperature in any circuit that flows into the refrigerant merger due to unbalanced refrigerant flow rate in each circuit in the evaporator is kept constant. When the temperature of the refrigerant drops to below, the superconductor attached to the inner wall of the hollow body becomes diamagnetic and generates a repulsive force between the orifice and the magnetic material that makes up the orifice, causing the orifice to move. By narrowing the circuits, the refrigerant flow balance can be corrected, and the refrigerant temperature in each circuit flowing into the confluencer can be kept approximately the same, thereby achieving stable evaporation capacity.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a sectional view showing the general shape of the refrigerant combiner of the present invention;
Fig. 2 is a refrigerant circuit diagram in which the refrigerant merger shown in Fig. 1 is connected to an evaporator, Figs. 3 and 4 are sectional views showing the operating state of the refrigerant divider shown in Fig. 1, and Fig. 5 is a conventional refrigerant flow divider. FIG. 6 is a sectional view showing the general shape of the refrigerant merger, and is a refrigerant circuit diagram in which the refrigerant merger of FIG. 5 is connected to an evaporator. 7... Refrigerant merger, 8... Hollow body, 9... Inlet, 10... Outlet, 11... Orifice, 12...
・Magnetic material, 13... superconductor. Name of agent: Patent attorney Toshio Nakao and 1 other person 7 - Rei Media 3
Poor 6 8- Medium body? -Inflow/Inflow-2-Magnetic body 13-・Jiat body 9-0 inlet +3-Jt arc good body 4 Figure 5 Figure 6

Claims (1)

[Claims] A hollow body comprising a hollow body having a plurality of inlets and a single outlet, and an orifice made of a magnetic material, wherein the orifice operates in a direction perpendicular to the flow of refrigerant within the hollow body, and the orifice is in contact with the flow of the refrigerant during operation. A refrigerant mixer for an evaporator, characterized in that a superconductor is provided on the inner wall surface of the evaporator.