JP5395358B2 - A gas-liquid separator and a refrigeration apparatus including the gas-liquid separator. - Google Patents

Description

  The present invention relates to a gas-liquid separator and an oil separator for a heat engine such as a refrigeration cycle or a steam cycle, and more particularly to a technique for further improving performance and downsizing.

  For example, as a gas-liquid separator and oil separator used in a refrigeration cycle, a tank that stores liquid or oil by gravity is used, or liquid or oil is attached to an outer wall by centrifugal force of swirling flow, and liquid or oil is collected by gravity. A gas-liquid separation device or the like that collects water is used.

  The gas-liquid separator and the oil separator having such a configuration basically have a structure in which a liquid phase having a high density is separated by a body force such as gravity or centrifugal force. For this reason, since it uses a tank and a swirl flow generator, it is a large-sized device, and there are few degrees of freedom in the installation position and direction of a gas-liquid separation device. Furthermore, no means for efficiently separating the gas and liquid has been shown.

Therefore, in order to solve the above-mentioned problems, the inventors have made the gas-liquid separation device higher performance and smaller in size by causing the liquid phase to adhere to the groove by the action of surface tension in the groove and flowing. We have filed a patent for an invention that aims to achieve this.
International patent application number: PCT / JP2006 / 322682

  Conventional gas-liquid separators and oil separators have a structure in which a liquid phase (oil) with a high density is separated by a bulk force such as gravity or centrifugal force. It is necessary to set the flow velocity and to devise such as matching the installation direction and the gravity direction.

  These require a tank that has a height in the direction of gravity, or need to increase the flow rate when centrifugal force is used. Further, in order to generate a bending flow, it is necessary to change the direction of the flow using a partition plate or the like. For this reason, pressure loss tends to increase, and the apparatus becomes large in order to prevent it, and it is difficult to reduce the size.

  In order to reduce the size of the gas-liquid separation device described above, it is necessary to increase the flow velocity and reduce the radius of curvature. Since the influence of the surface tension or the like cannot be ignored, there is a problem that the characteristics of the apparatus itself deteriorates or the pressure loss increases, and the refrigeration cycle performance deteriorates.

  The present invention further develops the previously filed PCT / JP2006 / 322682 and uses the surface tension effect to improve the performance and miniaturization of the gas-liquid separator, and an oil separator. Therefore, it is possible to capture droplets carried in the gas phase as much as possible, and to provide a high-performance and small gas-liquid separator and oil separator, and further, the gas-liquid separator is an air conditioner, refrigerator, freezer, It is proposed to be used in refrigeration equipment such as dehumidifiers, showcases, vending machines and car air conditioners.

  There are two ways to capture the droplets carried in the gas phase as much as possible, the first of which is to capture the droplets in the groove as much as possible, and the second is that the droplets should get on the gas phase and get into the groove It is a means to make it the structure which is hard to flow out of a gaseous-phase exit pipe | tube, even if it comes out of. These means will be described below.

According to the first aspect of the present invention, a grooved body having a groove toward the liquid phase outlet pipe is provided in a part of the gas-liquid separation chamber, and a narrow space is formed with an outer body and an inlet partition upstream of the gas-liquid separation chamber. The gas-liquid two-phase flow guided from the inlet pipe is guided to the gas-liquid separation chamber from the grooved body after passing through the narrow space, and the gas-liquid two-phase flow is passed through the grooved body. In the gas-liquid separation device characterized in that the gas phase has a gas-liquid separation mechanism that is led to the phase outlet pipe and the gas phase is led from the gas-liquid separation chamber to the gas phase outlet pipe, the groove is formed from the inner surface of the outer body. Inclined by an angle α with respect to the line toward the center line of the outer body, the surface of the grooved body has a substantially wave shape inclined at an angle θ with respect to the flow direction, and a substantially wave inclined at an angle θ with respect to the flow direction. A gas-liquid separation device characterized in that the shape is formed to spread outward in the radial direction with respect to the flow direction. A.

Invention of Claim 2 is the gas-liquid separator of Claim 1, Comprising: In the gas-liquid two-phase flow guide | induced to the grooved body through the said narrow space, a liquid phase is a grooved body. At least a part of the gas phase is guided to the gas-liquid separation chamber without passing through the communication hole provided in the outlet partition, and then the gas provided in the upper part of the gas-liquid separation chamber is directed to the liquid-phase outlet pipe. It is made to go to the phase outlet pipe.

The invention according to claim 3 is the gas-liquid separator according to claim 1, wherein the gas-liquid separator is grooved with at least one member selected from the group consisting of an inlet partition, an outer shell, an outlet partition, and a partition cylinder. It is characterized by defining the position of the body.

Invention of Claim 4 is the gas-liquid separator of Claim 1, Comprising: A gas-phase outlet pipe is provided in the upper part of a gas-liquid separator, and the lower part of a gas-phase outlet pipe is in the upper part of an inlet partition. The connection is made in a state where fluid can be conducted, and the lower end portion of the gas-phase outlet pipe is prevented from protruding below the narrow space.

The invention according to claim 5 is the gas-liquid separation device according to any one of claims 1 to 4, wherein the inflow chamber and the gas-liquid separation chamber are partitioned by the outer body and the inlet partition, and the inflow The gas-liquid separation device has a chamber positioned above the gas-liquid separation chamber, and the gas-liquid two-phase flow guided from the inlet pipe flows into the inflow chamber from the side of the outer body. A phase flow is swirled in the inflow chamber, and a gas phase outlet pipe is provided in the upper part of the gas-liquid separator, so that the gas phase is guided to the upper part of the gas-liquid separator through the inlet pipe. It is characterized by that.

A sixth aspect of the present invention includes a gas-liquid separation device in which the gas-liquid separation device according to any one of the first to fifth aspects is incorporated in a refrigeration cycle such as an air conditioner. Refrigeration equipment.

According to a seventh aspect of the present invention, an outlet pipe of a decompressor in a refrigeration cycle is connected to the two-phase inlet pipe of the gas-liquid separator according to any one of the first to fifth aspects, and the gas-liquid The liquid-phase outlet pipe of the separator is connected to a pipe line leading to the evaporator, while the gas-phase outlet pipe of the gas-liquid separator is connected to the suction pipe of the compressor through a bypass path and a resistance adjuster. This is a refrigeration apparatus.

According to an eighth aspect of the present invention, a compressor discharge pipe in the refrigeration cycle is connected to the two-phase inlet pipe of the gas-liquid separation apparatus according to any one of the first to fifth aspects, and the gas-liquid separation is performed. The liquid-phase outlet pipe of the apparatus is connected to the compressor suction pipe via a flow rate adjusting throttle, while the gas-phase outlet pipe of the gas-liquid separator is connected to a pipe line leading to the condenser of the refrigeration cycle. Refrigeration equipment.

According to the present invention, a strong secondary flow can be generated in the space sandwiched between the grooved bodies by providing a substantially wave shape having an inclination angle on the surface of the grooved body. Further, since this secondary flow becomes a flow in a very narrow space sandwiched between the grooved bodies, the radius of curvature of the streamline can be made very small. This makes it possible to apply a very strong centrifugal force to the droplet. In addition, since the surface area of the grooved body per volume of the gas-liquid separator can be compactly mounted, the droplet capture area per volume can be increased, so that a very compact gas-liquid separator can be configured. it can.

Further, according to the present invention , a strong secondary flow is generated by forming the substantially wave shape inclined in the flow direction provided on the surface of the grooved body so as to spread radially outward in the flow direction. Thus, the droplets captured by the centrifugal force can be effectively flowed down along the wall surface using the shearing force and gravity of the flow without scattering again as droplets.

Furthermore, according to the present invention , the following three effects can be obtained by providing the groove at an angle α with respect to the center line of the outer body. The first effect is that the groove width b ′ becomes smaller than the groove width b when the groove is not inclined by inclining the groove. When the gas phase flows in the groove, the droplets carried on the gas phase tend to collide with the surface of the groove and become a liquid film as the groove width decreases, so tilt the groove to make the actual groove width smaller. As a result, gas-liquid separation performance can be improved. The second effect is that the groove is inclined at an angle α, so that the flow direction of the gas phase coming out of the groove flows into the gas-liquid separation chamber with an angle α. Therefore, a swirling flow is generated in the gas-liquid separation chamber by having the angle α from all the grooves opened in the gas-liquid separation chamber and flowing into the gas-liquid separation chamber. Fine droplets that flow out of the groove on the gas phase easily gather in the space inside the gas-liquid separation chamber near the opening of the groove due to the centrifugal force due to the swirling flow. The probability of becoming increased. As the droplet diameter d increases, the droplets easily fall downward. Therefore, it is difficult for the droplets to flow out from the gas phase outlet pipe 6, and a high-performance gas-liquid separation device can be provided. The third effect is that by tilting the groove in a state where the substantial length h of the groove is constant, the groove depth h ′ perpendicular to the groove bottom surface is smaller than the groove depth h when not tilting. Therefore, by tilting the groove, the diameter Dt of the groove vertex virtual circle is substantially increased. For this reason, the gas-liquid separation chamber axial vapor phase rising speed ua decreases, and the droplets easily fall downward. Therefore, it is difficult for the droplets to flow out from the gas phase outlet pipe, and a high-performance gas-liquid separation device can be provided.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

“First Embodiment”
FIG. 1 is a cross-sectional view showing a gas-liquid separator according to a first embodiment. 2 is a cross-sectional view of the gas-liquid separator shown in FIG. FIG. 3 is a developed perspective view of the grooved body 4 formed by bending a thin plate, and FIG. 4 is an enlarged view when one pitch of the grooved body 4 of FIG. 3 is taken out. As shown in FIG. 1, a grooved body 4 having a groove 2 toward the liquid phase outlet pipe 7 is provided in the outer body 10, and an inlet partition 16 is provided upstream of the grooved body 4. A separation chamber 1 is configured. The grooved body 4 forms a groove 2 by bending a thin plate as shown in FIG. 3, and the grooved body 4 is entirely inserted into the outer body 10 as shown in FIG. Downstream of the grooved body 4, the gas phase outlet pipe 6 is located under the outer body 10 so that an outlet partition 8 joined to the gas phase outlet pipe 6 defines a lower position in the height direction of the grooved body 4. It is joined to the contracted tube portion 13.
The gas-liquid two-phase flow flows from the inlet pipe 5 and further flows into the narrow space 12 formed by the inlet partition 16 and the outer body B11. Since the gas-liquid two-phase flow is supplied along the groove 2 in the narrow space 12 formed with the entrance partitioning body 16, the gas-liquid two-phase flow flows into the groove along the groove. The two-phase liquid phase flowing into the grooved body 4 basically adheres to the surface of the groove 2 and forms a liquid film. Further, the droplets carried on the gas phase collide with the surface of the groove 2 to form a liquid film. The liquid film flows downward and flows out from the liquid phase outlet pipe 7. The gas phase from which the droplets have been removed flows out from the gas phase outlet pipe 6.

  Here, the surface of the grooved body 4 is provided with a substantially wave shape inclined in the mainstream direction as shown in FIG. The substantially wave shape is formed so as to spread radially outward in the direction of flow. Due to the effect of the inclined substantially wave shape, the secondary flow 20 in the cross section as shown in FIG. When the droplet 14 conveyed in the gas phase flows between them, the droplet rotates in the cross section by the secondary flow 20 and collides with the grooved body 4 by the effect of the centrifugal force acting at that time. The colliding droplet 14 becomes a liquid film on the surface of the grooved body, and flows downward along a substantially wave shape by the mainstream shearing force and gravity. In this manner, the liquid droplets in the gas phase can be gas-liquid separated.

  In addition, since the secondary flow to generate | occur | produces becomes a flow in the very narrow space in the groove | channel of a grooved body, the curvature radius of the streamline also becomes a very small thing. This makes it possible to apply a very strong centrifugal force to the droplet. In addition, since the surface area of the grooved body per volume of the gas-liquid separator can be mounted in a compact manner, the droplet capture area per volume can be increased, and a very compact gas-liquid separator can be constructed. Can do.

“Second Embodiment”
FIG. 5 is a cross-sectional view showing a gas-liquid separator according to the second embodiment. FIG. 6 is a developed perspective view of the grooved body 4 formed by bending a thin plate, and FIG. 7 is an enlarged view when one pitch of the grooved body 4 of FIG. 3 is taken out. This substantially wave shape is formed so as to widen toward the flow direction.

  Here, the surface of the groove of the grooved body 4 is provided with a substantially wave shape inclined in the mainstream direction as shown in FIG. This substantially wave shape is formed so as to widen toward the flow direction. Due to the effect of the inclined substantially wave shape, the secondary flow 20 in the cross section as shown in FIG. When the droplet 14 conveyed in the gas phase flows between them, the droplet rotates in the cross section by the secondary flow 20 and collides with the grooved body 4 by the effect of the centrifugal force acting at that time. The colliding droplet 14 becomes a liquid film on the surface of the grooved body, and flows downward along a substantially wave shape by the mainstream shearing force and gravity. In this manner, the liquid droplets in the gas phase can be gas-liquid separated.

“Third Embodiment”
FIG. 8 is a cross-sectional view showing a gas-liquid separator according to the third embodiment. In the third embodiment, as shown in FIG. 9, a partition cylinder 37 is installed between the grooved body 4 and the gas-liquid separation chamber 1. By the partition cylinder 37, the gas-liquid two-phase flow flowing in the grooved body 4 can flow to the lower part of the grooved body 4 without escaping to the gas-liquid separation chamber 1. As a result, a sufficient distance can be secured for the droplets to collide with the wall surface of the grooved body. The gas phase reaching the lower side of the grooved body 4 flows into the gas-liquid separation chamber 1 from the communication hole 22 provided in the outlet partition 8 and flows out from the gas phase outlet pipe 6.

ここで、液滴は小さいので、抗力係数を以下のように置く。

式（１）と（２）から半径方向速度ｕ_ｒを求めると、以下のようになる。

ここで以下の積分を考える。ｕ_ｒ＝ｄｒ／ｄｔに注意すると、

となる。ここで、Ｔは液滴がｒ_０からｒ_０＋ｈまで移動する時間、すなわち液滴が壁面に衝突するために必要な飛行時間である。式（４）を積分すると、

が得られる。従って、液滴が壁面に衝突するまでの飛行時間Ｔは

となる。
主流速度ｕ×飛行時間Ｔが、液滴が壁面に衝突するまでに必要な液滴の流れ方向飛行距離であり、これが気液分離装置の溝付き体の必要な長さＬとなる。Hereinafter, the phenomenon until the droplet collides with the wall surface will be considered. As a first approximation, consider a model as shown in FIG. Consider the balance between the centrifugal force acting on the droplet 14 of diameter d that rotates at a position of radius r ₀ and the radial drag force acting on the droplet from the gas phase. When the radial velocity of the droplet is u _r and the circumferential velocity is u _l , the balance between centrifugal force and drag force is expressed by the following equation.

Here, since the droplet is small, the drag coefficient is set as follows.

When determining the radial velocity u _r from equation (1) and (2), as follows.

Now consider the following integral: Note that u _r = dr / dt,

It becomes. Here, T is a time required for the droplet to move from r ₀ to r ₀ + h, that is, a flight time required for the droplet to collide with the wall surface. Integrating equation (4),

Is obtained. Therefore, the flight time T until the droplet collides with the wall surface is

It becomes.
The main flow velocity u × flight time T is the flight distance flight distance necessary for the droplet to collide with the wall surface, and this is the required length L of the grooved body of the gas-liquid separator.

これは、図１０のように溝付き体ピッチｐの間に半径ｒ_０の渦対が一対形成されるとの仮定に基づいている。
また、渦の半径方向速度ｕ_ｌは、主流速度ｕのｂ倍と仮定する。すなわち、
ｕ_ｌ＝ｂ×ｕ （９）
式（７）〜（９）を式（６）に代入すると、液滴が壁面に衝突するまでの飛行時間Ｔが得られ、これに主流速度ｕを乗じることで、液滴の飛行距離、すなわち液滴を捕獲するために必要な溝付き体の長さＬが以下のように求められる。

式（１０）を変形すると、次式が得られる。

図１２に、係数ａとｂの値を変化させたときの式（１１）右辺の値の変化を示す。本発明の傾斜した略波形状によって誘起される二次流れの強さは、約０．０５≦ｂ≦０．３と考えられる。また溝付き体１ピッチあたりに渦対が一対構成されることから、渦の半径に対してはａ≦０．２５である。このような条件を想定するとａ＝０，ｂ＝０．０５の場合に式（１１）は最大となり、その値は９００となる。従って、

としておけば、この条件下ではどの位置の液滴も捕獲できることになる。Apply this model to the grooved body of FIG. As a secondary flow, a pair of vortices is formed between the groove pitches, and the vortex radius r ₀ is a times the grooved body pitch p,
r ₀ = a × p (7)
Assume that Further, assume that the distance to streamline the grooved body wall of the vortex and is h, it can be described as follows using a radius r ₀ and the grooved body pitch p of the vortex mentioned above.

This is based on the assumption that a pair of vortexes having a radius r ₀ is formed between the grooved body pitches p as shown in FIG.
Further, it is assumed that the radial velocity u _l of the vortex is b times the main flow velocity u. That is,
u ₁ = b × u (9)
By substituting Equations (7) to (9) into Equation (6), the flight time T until the droplet collides with the wall surface is obtained, and by multiplying this by the mainstream velocity u, the flight distance of the droplet, that is, The length L of the grooved body necessary for capturing the droplet is obtained as follows.

When the equation (10) is transformed, the following equation is obtained.

FIG. 12 shows a change in the value on the right side of Equation (11) when the values of the coefficients a and b are changed. The strength of the secondary flow induced by the inclined substantially wave shape of the present invention is considered to be about 0.05 ≦ b ≦ 0.3. Further, since a pair of vortex pairs is formed per pitch of the grooved body, a ≦ 0.25 with respect to the vortex radius. Assuming such a condition, when a = 0 and b = 0.05, the expression (11) becomes maximum and the value becomes 900. Therefore,

As a result, a droplet at any position can be captured under this condition.

“Fourth Embodiment”
FIG. 13 is a cross-sectional view showing a gas-liquid separator according to a fourth embodiment. FIG. 14 is a cross-sectional view of the gas-liquid separator shown in FIG. FIG. 15 is a developed perspective view of the grooved body 4 formed by bending a thin plate. FIG. 16 is a principle model diagram showing the effect of providing the groove 2 with an inclination. As shown in FIG. 13, a grooved body 4 having a groove 2 toward the liquid phase outlet pipe 7 is provided in the outer body 10, and an inlet partition 16 is provided upstream of the grooved body 4. A liquid separation chamber 1 is configured. The grooved body 4 is formed by bending a thin plate as shown in FIG. 15 to form the groove 2, and the grooved body 4 is inserted into the outer body 10 as shown in FIG. Downstream of the grooved body 4, the gas phase outlet pipe 6 is located under the outer body 10 so that an outlet partition 8 joined to the gas phase outlet pipe 6 defines a lower position in the height direction of the grooved body 4. It is joined to the contracted tube portion 13.
The gas-liquid two-phase flow flows from the inlet pipe 5 and further flows into the narrow space 12 formed by the inlet partition 16 and the outer body B11. Since the gas-liquid two-phase flow is supplied along the groove 2 in the narrow space 12, the gas-liquid two-phase flow flows into the groove along the groove. The two-phase liquid phase that has flowed into the grooved body 4 basically adheres to the surface of the groove 2 to form a liquid film. Further, the droplets carried on the gas phase collide with the surface of the groove 2 to form a liquid film. The liquid film flows downward and flows out from the liquid phase outlet pipe 7. The gas phase from which the droplets have been removed flows out from the gas phase outlet pipe 6.

  Here, the groove 2 of the grooved body 4 is provided at an angle α with respect to the center line 15 of the outer body 10 as shown in FIG. The effect of inclining the groove α will be described with reference to the principle model diagram shown in FIG. FIG. 16 is a principle model diagram in which one groove of the grooved body 4 is taken out, FIG. 16A is a model diagram when the groove is not inclined, and FIG. 16B is a case where the groove is inclined at an angle α. FIG.

  The first effect by tilting the groove will be described. By tilting the groove, the groove width b 'becomes smaller than the groove width b when not tilting. When the gas phase flows in the groove, the droplet carried on the gas phase is likely to collide with the surface of the groove 2 to form a liquid film as the groove width is smaller. Therefore, the groove is inclined to reduce the substantial groove width. Thus, the gas-liquid separation performance can be improved. In FIG. 16A, it is conceivable to simply reduce the groove pitch p. However, simply reducing the groove pitch p while the diameter of the outer body 10 is constant means that the number of grooves increases. There is a problem that the amount of the material constituting the body increases and the price of the gas-liquid separator increases. Therefore, by tilting the groove, the substantial groove width can be reduced, and a high-performance and inexpensive gas-liquid separation device can be provided.

  A second effect by tilting the groove will be described with reference to FIG. As shown in FIG. 14, when the groove is inclined at an angle α, the flow direction 23 of the gas phase coming out of the groove flows into the gas-liquid separation chamber 1 with an angle α. Therefore, the swirl flow 24 is generated in the gas-liquid separation chamber 1 by the gas phase flowing in at an angle α from all the grooves opened in the gas-liquid separation chamber 1.

を満足すると、液滴は下方に落下し易くなる。ここで、液滴径をｄ、抗力係数をＣ_Ｄ、気相密度をρ_Ｇ、液相密度をρ_Ｌ、気相動粘性係数をν_Ｇ、液滴の投影面積をＡ＝πｄ^２／４として、ＦｇおよびＦ_Ｄはそれぞれ式（１４）、式（１５）となる。

式（２）で定義される抗力係数を与えると、

となり、液滴径ｄが大きくなると液滴は下方に落下し易くなる。したがって、溝を傾けることにより、気液分離室１内に旋回流２４が発生し、液滴は気相出口管６から流出され難くなり、高性能な気液分離装置を提供できる。When the droplets carried in the gas phase in the groove 2 are extremely small, the fine droplets may flow out of the groove 2 into the gas-liquid separation chamber 1 without colliding with the groove surface. At this time, as shown in FIG. 20, when the groove is not inclined, the fine liquid droplets flowing out into the gas-liquid separation chamber 1 are uniformly distributed toward the center of the gas-liquid separation chamber 1, and the gas-liquid separation is performed. It takes the indoor axial direction gas-phase rising speed u _a 25 and flows out from the gas-phase outlet pipe 6. On the other hand, the swirl flow 24 is generated in the gas-liquid separation chamber 1 by tilting the groove, and the fine droplets enter the space in the gas-liquid separation chamber near the opening of the groove 2 by the action of the centrifugal force due to the swirl flow. It becomes easier to gather and the fine droplets are combined with each other, and the probability of becoming larger droplets increases. When the droplet is large, gravity Fg acting on the droplets, since exceeding the drag F _D to increase the liquid manner by axial vapor rising speed u _a 25, droplets liable to fall down, the gas phase outlet It becomes difficult to flow out of the pipe 6. That is,

If the condition is satisfied, the droplet easily falls downward. Here, the droplet diameter d, the drag coefficient _{C D,} the gas phase density [rho _G, the liquid phase density [rho _L, air phasic viscosity coefficient [nu _G, the projected area of the droplet A = πd ^2/4 as each equation Fg and _{F D} (14), the equation (15).

Given the drag coefficient defined by equation (2),

Thus, as the droplet diameter d increases, the droplets easily fall downward. Therefore, by tilting the groove, a swirl flow 24 is generated in the gas-liquid separation chamber 1, and the droplets are less likely to flow out of the gas-phase outlet pipe 6, so that a high-performance gas-liquid separation device can be provided.

A third effect by inclining the groove will be described with reference to FIGS. 13, 14, and 16.
As shown in FIG. 16, when the groove is tilted with the substantial length h of the groove being constant, the vertical groove depth h ′ with respect to the groove bottom surface becomes smaller than the groove depth h when not tilting. Therefore, by inclining the groove, the diameter Dt of the groove apex virtual circle 9 shown in FIG. 14 is substantially increased. For this reason, the gas-liquid separation chamber axial vapor phase rising speed u _a 25 decreases, and as shown in the equation (16), the tendency of F _D <Fg increases, and the droplets easily fall downward. Therefore, by inclining the groove, it is difficult for the droplets to flow out from the gas phase outlet pipe 6, and a high-performance gas-liquid separator can be provided. In the fourth embodiment described above, an example in which the grooved body 4 in which a thin plate is bent is used has been described. However, the grooved body may be produced by other means such as machining as shown in FIG. Needless to say, the effect described above is the same for a grooved body.

“Fifth Embodiment”
FIG. 18 is a cross-sectional view showing a gas-liquid separator according to a fifth embodiment. 19 is a cross-sectional view taken along the line CC of FIG. 20 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 19, the inlet pipe 5 is provided so as to flow into the inflow chamber 19 from the side of the outer body B11 in the tangential direction. As shown in FIG. 18, the gas-liquid separator is provided with a gas-phase outlet pipe 6 at the upper part of the gas-liquid separator, and the lower part of the gas-phase outlet pipe 6 is connected to the upper part of the inlet partition 16 in a fluid-movable state. The gas phase outlet pipe 6 is joined to the upper contraction pipe portion 17 of the outer body B11. A grooved body 4 having a groove 2 toward the liquid phase outlet pipe 7 is provided in the outer body 10, and an inlet partition body 16 is provided upstream of the grooved body 4, It is composed. The grooved body 4 forms a groove 2 by bending a thin plate as shown in FIG. 21, and is inserted into the outer body 10 as shown in FIG. Downstream of the grooved body 4, a lower position in the height direction of the grooved body 4 is defined by a bead 26 provided in the outer body 10, and the liquid phase outlet pipe 7 is provided in the lower contraction tube portion 13 at the lower part of the outer body 10. It is joined.
The gas-liquid two-phase flow flows from the inlet pipe 5 and further flows into the narrow space 12 formed by the inlet partition 16 and the outer body B11. Since the gas-liquid two-phase flow is supplied along the groove 2 in the narrow space 12, the gas-liquid two-phase flow flows into the groove along the groove. The two-phase liquid phase that has flowed into the grooved body 4 basically adheres to the surface of the groove 2 to form a liquid film. Further, the droplets carried on the gas phase collide with the surface of the groove 2 to form a liquid film. The liquid film flows downward and flows out from the liquid phase outlet pipe 7. The gas phase from which the droplets have been removed rises in the gas-liquid separation chamber 1, passes through the inlet partition 16, and flows out from the gas phase outlet pipe 6.

According to the gas-liquid separation apparatus of the fifth embodiment shown in FIG. 18, the gas-phase outlet pipe penetrates the gas-liquid separation chamber 1 because the gas-phase outlet pipe 6 is provided in the upper part of the gas-liquid separation apparatus. it is not to be, as shown in FIG. 20, the entire inside diameter Dt of the groove vertex imaginary circle 9 is a gas-liquid separation chamber axis vapor upflow channel, vapor rising speed u _a is reduced, formula ( As shown in 16), the tendency of F _D <Fg becomes strong, and the droplets easily fall downward. Therefore, the gas phase outlet pipe 6 is provided in the upper part of the gas-liquid separation device, and the lower part of the gas phase outlet pipe 6 is connected to the upper part of the inlet partition 16 in a fluid-movable state so that the liquid droplets are discharged from the gas phase outlet. It becomes difficult to flow out from the pipe 6, and a high-performance gas-liquid separator can be provided. In particular, in the case of an oil separator having a large gas phase flow rate relative to the liquid phase flow rate, it is necessary to increase the diameter dp of the gas phase outlet pipe 6 shown in FIG. The cross-sectional area of the gas-phase outlet pipe 6 occupying the flow path cannot be ignored, and a configuration in which the gas-phase outlet pipe 6 does not penetrate the gas-liquid separation chamber 1 has a great effect.

“Sixth Embodiment”
FIG. 22 is a first refrigeration cycle configuration diagram when the above-described gas-liquid separation device is used in a refrigeration cycle as a sixth embodiment. The refrigeration cycle configuration diagram shown in FIG. 22 shows basic components necessary for explaining the present embodiment. That is, the compressor 27 has a first cylinder 28 and a second cylinder 29, and the low-temperature and low-pressure gas-phase refrigerant sucked by the compressor is compressed in two stages by the first cylinder 28 and the second cylinder 29. The refrigerant becomes a high-temperature high-pressure gas-phase refrigerant, passes through the refrigerant discharge pipe 30, dissipates heat to the air sent by the condenser blower 32, and becomes high-pressure liquid refrigerant. The liquid refrigerant is decompressed by the first decompressor 33 to form a two-phase flow, flows into the gas-liquid separator 43 from the inlet pipe 5, and the liquid refrigerant exits from the liquid phase outlet pipe 7 and then the second decompressor. The pressure is further reduced at 34, the heat is taken from the air that enters the evaporator 35 and is sent by the evaporator blower 36, becomes a low-temperature low-pressure gas-phase refrigerant, and is sucked into the compressor 27. On the other hand, since the gas-phase refrigerant separated by the gas-liquid separation device 43 is sucked into the second cylinder 29 from the gas-phase outlet pipe 6, the gas-phase refrigerant separated by the gas-liquid separation device 43 does not contribute to evaporation. Therefore, it is not necessary to perform compression with the cylinder 28, the compression power can be reduced, and highly efficient operation can be realized.
“Seventh Embodiment”

  FIG. 23 is a second refrigeration cycle configuration diagram when the above-described gas-liquid separation device is used in a refrigeration cycle as a seventh embodiment. The refrigeration cycle block diagram shown in FIG. 23 shows basic components necessary for explaining the present embodiment. That is, the compressor 27 has only the first cylinder 28, and the low-temperature and low-pressure gas-phase refrigerant sucked in by the compressor is compressed by the first cylinder 28 to become a high-temperature and high-pressure gas-phase refrigerant and is condensed through the refrigerant discharge pipe 30. The heat is dissipated to the air sent by the condenser blower 32 in the condenser 31, and becomes a high-pressure liquid refrigerant. The liquid refrigerant is decompressed by the first decompressor 33 to form a two-phase flow, and flows into the gas-liquid separator 43 from the inlet pipe 5. The liquid refrigerant enters the evaporator 35 from the liquid phase outlet pipe 7, and the evaporator blower 36. Heat is taken away from the air sent in to form a low-temperature and low-pressure gas-phase refrigerant and sucked into the compressor 27. On the other hand, the gas-phase refrigerant separated by the gas-liquid separator is sucked into the compressor 27 from the gas-phase outlet pipe 6 through the evaporator bypass pipe 38.

When the gas-liquid separator 43 is not used, the two-phase gas-phase refrigerant decompressed by the decompressor 33 also flows into the evaporator, and particularly when the air temperature sent by the evaporator blower 36 is low. Since the evaporation pressure is decreased, the density of the gas-phase refrigerant is decreased, and the volume flow rate is increased. Therefore, the pressure loss in the evaporator 35 is large and the outlet pressure of the evaporator 35, that is, the compressor suction pressure is decreased. Increases, and high-efficiency operation becomes impossible.
On the other hand, as shown in the present embodiment, the gas-liquid separation device 43 is provided, and the separated gas-phase refrigerant is sucked into the compressor 27 from the gas-phase outlet pipe 6 through the evaporator bypass pipe 38, thereby evaporating. Since the gas-phase refrigerant that does not contribute to the refrigerant does not flow into the evaporator 35, pressure loss in the evaporator 35 can be suppressed, compression power can be reduced, and highly efficient operation can be achieved.

  Conventionally, as a gas-liquid separator used in a refrigeration cycle, a tank that collects liquid by gravity, a gas-liquid separator that collects liquid by gravity by attaching a liquid phase to the outer wall by centrifugal force of swirling flow, etc. However, the gas-liquid separator having such a configuration basically has a structure in which a liquid phase having a high density is separated by a volume force such as gravity or centrifugal force. In addition, the degree of freedom is low and the tank and swirl flow generator are used, so it is a large device. By using the gas-liquid separation device of the present invention, it is small and the installation position and orientation are free. As described in the sixth and seventh embodiments, high-efficiency operation can be achieved while exhibiting a large effect.

“Eighth embodiment”
FIG. 24 is a third refrigeration cycle configuration diagram in the case where the gas-liquid separator described above is used in a refrigeration cycle as an eighth embodiment. FIG. 24 shows an example of a separate type air conditioner, which includes an outdoor unit 39 and an indoor unit 40, and shows a cycle during cooling operation. Refrigerating machine oil is mixed in the high-temperature and high-pressure gas-phase refrigerant compressed by the compressor 27, and when the amount of refrigerating machine oil mixed in the gas-phase refrigerant discharged from the compressor increases, the pressure loss of the refrigeration cycle refrigerant flow path increases. It increases, and the evaporative heat transfer coefficient and the condensation heat transfer coefficient of the refrigerant decrease, causing a decrease in refrigeration cycle efficiency. Furthermore, when the compressor is started, the refrigerating machine oil enclosed in the compressor forms, and a large amount of the refrigerating machine oil is mixed into the gas phase refrigerant and discharged from the compressor, and flows out into the refrigerating cycle. In particular, in the case of a separate type air conditioner, a connecting pipe for connecting the indoor unit and the outdoor unit is provided. When this connecting pipe 48 is long, the refrigeration oil that has flowed into the refrigeration cycle does not return to the compressor for a long time. Depending on the operating conditions, there is a problem that the compressor oil in the compressor is insufficient and the reliability of the compressor is hindered.

  Therefore, in order to solve the above problems, FIG. 24 is provided with a compact gas-liquid separation device 43 in the refrigerant discharge pipe of the compressor 27 to ensure the refrigeration cycle efficiency and the reliability of the compressor. That is, the low-temperature and low-pressure gas-phase refrigerant sucked in by the compressor 27 is compressed by the compressor 27 and becomes a high-temperature and high-pressure gas-phase refrigerant and flows into the gas-liquid separation device from the inlet pipe 5 of the gas-liquid separation device 43 through the refrigerant discharge pipe 41. To do. Refrigerating machine oil is mixed in the high-temperature and high-pressure gas-phase refrigerant compressed by the compressor 27, and the refrigerating machine oil is separated as a liquid phase and the gas-phase refrigerant is separated as a gas phase in the gas-liquid separator 43, respectively. It is taken out from the pipe 7 and the gas phase outlet pipe 6. The refrigerating machine oil exiting the liquid phase outlet pipe 7 is sucked into the compressor suction pipe 46 through the liquid receiver 42 and the flow rate adjusting throttle 45, and the refrigerating machine oil returns to the compressor. The reason why the flow rate adjusting throttle 45 is provided is that, under normal operating conditions, the amount of refrigerating machine oil mixed in the high-temperature and high-pressure gas-phase refrigerant discharged from the compressor 27 is smaller than that in the gas-phase refrigerant. This is because the refrigeration oil separated in step (3) is gradually returned to the compressor 27 by the flow rate adjusting throttle 45. The reason why the liquid receiver 42 is provided is that the refrigerating machine oil enclosed in the compressor is formed at the time of starting the compressor, and a large amount of refrigerating machine oil is mixed in the gas phase refrigerant and discharged from the compressor. This is a temporary phenomenon, so that the refrigerating machine oil separated by the gas-liquid separator 43 is temporarily stored in the liquid receiver 42, and the refrigerating machine oil is gradually returned to the compressor 27 by the flow rate adjusting throttle 45. In addition, when the volume of the liquid reservoir 18 of the gas-liquid separator is large, the liquid receiver is not necessarily required.

  On the other hand, the gas-phase refrigerant separated in the gas-liquid separator 43 passes through the four-way valve 47 from the gas-phase outlet pipe 6 and radiates heat to the air sent from the condenser blower 32 to become high-pressure liquid refrigerant. The liquid refrigerant is decompressed by the first decompressor 33 to become a low-temperature and low-pressure two-phase flow, takes heat from the air that enters the evaporator 35 and is sent by the evaporator fan 36, and becomes a low-temperature and low-pressure gas-phase refrigerant. Inhaled. Therefore, the refrigerating machine oil is separated as a liquid phase in the gas-liquid separator 43, and is sucked into the compressor suction pipe 46 through the liquid receiver 42 and the flow rate adjusting throttle 45 from the liquid phase outlet pipe 7, and the refrigerating machine oil is supplied to the compressor. Because it returns, it is possible to prevent refrigeration oil from flowing into the refrigeration cycle, enabling highly efficient refrigeration cycle operation, and also preventing refrigeration oil from flowing into the refrigeration cycle even at start-up, so that reliable operation is possible. Is possible.

としたことを特徴とする。
本発明（６）は、溝内で液滴を極力捕捉し、さらに万一液滴が気相に乗って溝から流出ても気相出口管から液滴が流出し難い構成にするため、溝を外郭体の中心線に対して角度α傾けて設けたことを特徴とする。
本発明（７）は、溝内で液滴を極力捕捉した後、万一液滴が気相に乗って溝から流出しても気相出口管から液滴が流出し難い構成にするため、気相出口管を気液分離装置の上部に設け、気相出口管の下部は入り口仕切り体の上部に流体動通可能な状態で接続し、気液分離室断面積全体を軸方向気相上昇流路にしたことを特徴とする。
本発明（８）は、前記発明（１）から（５）の気液分離装置であって、溝内で液滴を極力捕捉し、さらに万一液滴が気相に乗って溝から流出ても気相出口管から液滴が流出し難い構成にするため、溝を外郭体の中心線に対して角度α傾けて設けたことを特徴とする。
本発明（９）は、前記発明（１）から（６）の気液分離装置であって、溝内で液滴を極力捕捉した後、万一液滴が気相に乗って溝から流出しても気相出口管から液滴が流出し難い構成にするため、気相出口管を気液分離装置の上部に設け、気相出口管の下部は入り口仕切り体の上部に流体動通可能な状態で接続し、気液分離室断面積全体を軸方向気相上昇流路にすることを特徴とする。
本発明（１０）は、前記発明（１）から（９）の気液分離装置を空気調和器等の冷凍サイクル中に組み込んだことを特徴とする気液分離装置を備えた冷凍装置である。
本発明（１１）は、前記発明（１）から（９）の気液分離装置の二相流入口管に、冷凍サイクル中の減圧器の出口管を接続し、気液分離装置の液相出口管を蒸発器に至る管路に接続し、一方、気液分離装置の気相出口管をバイパス路および抵抗調整体を介して圧縮機の吸込み管に接続したことを特徴とする冷凍装置である。
本発明（１２）は、前記発明（１）から（９）の気液分離装置の二相流入口管に、冷凍サイクル中の圧縮機吐出管を接続し、気液分離装置の液相出口管を流量調整絞りを介して圧縮機吸込み管に接続し、一方、気液分離装置の気相出口管を冷凍サイクルの凝縮器に至る管路に接続したことを特徴とする冷凍装置である。
本発明（１）によれば、溝付き体の表面にある傾斜角をもった略波形状を設けたことで、溝付き体に挟まれた空間内に強い二次流れを発生することができる。また、この二次流れは溝付き体に挟まれた非常に狭い空間内の流れとなるため、その流線の曲率半径を非常に小さいものとすることができる。このことで、液滴に非常に強い遠心力を働かせることができる。また、気液分離装置の体積あたりの溝付き体の表面積をコンパクトに実装することで、体積あたりの液滴捕獲面積を増すことができるので、非常にコンパクトな気液分離装置を構成することができる。
本発明（２）によれば、溝付き体の表面に設けられた流れ方向に傾斜した略波形状を、流れの向きに半径方向外側に広がるように形成したことで、強い二次流れを発生させて、その遠心力の効果によって捕捉した液滴を再び液滴として飛散させることなく、流れのせん断力と重力を利用して壁面を伝って有効に流下させることができる。
本発明（３）によれば、溝付き体の表面に設けられた流れ方向に傾斜した略波形状を、流れの向きに末広がりに形成したことで、強い二次流れを発生させて、その遠心力の効果によって捕捉した液滴を再び液滴として飛散させることなく、流れのせん断力と重力を利用して壁面を伝って有効に流下させることができる。
本発明（４）によれば、溝付き体の内側にも仕切り円筒を設けたことで、溝付き体の内部を流れる二相流を半径方向内側に逃さずに、有効に液滴を溝付き体壁面に衝突させ捕獲することができる。
本発明（５）によれば、溝付き体の長さＬ、溝付き体のピッチｐ、溝付き体を流れる主流速度ｕ、液滴径ｄ、気相粘性係数μ _Ｇ 、気相密度ρ _Ｇ 、液相密度ρ _Ｌ としたとき、

とすることで、液滴を捕獲するに十分な強さの二次流れと捕獲距離を確保することができる。
本発明（６）によれば、溝を外郭体の中心線に対して角度α傾けて設けることにより、以下の三つの効果が得られる。第一の効果は、溝を傾けることにより溝幅ｂ’は傾けない場合の溝幅ｂよりも小さくなる。溝内を気相が流れるとき、気相に乗って運ばれる液滴は溝幅が小さいほど溝の表面に衝突し液膜になりやすいため、溝を傾け、実質的な溝幅を小さくすることにより、気液分離性能を向上することができる。第二の効果は、溝を角度α傾けることにより、溝から出る気相の流れ方向は気液分離室に角度αを持ち流入する。したがって、気液分離室に開口する全ての溝から角度αを持ち気相が気液分離室に流入することにより、気液分離室内に旋回流が発生する。気相に乗り溝から流出した微細液滴は旋回流による遠心力の作用により、溝の開口部に近い気液分離室内の空間に集まり易くなり、微細液滴同士が結合しあい、より大きな液滴になる確率が増加する。液滴径ｄが大きくなると液滴は下方に落下し易くなる。したがって、液滴は気相出口管６から流出され難くなり、高性能な気液分離装置を提供できる。第三の効果は、溝の実質的長さｈが一定の状態で溝を傾けることにより、溝底面に対する垂直方向溝深さｈ’は傾けない場合の溝深さｈよりも小さくなる。したがって、溝を傾けることにより溝頂点仮想円の径Ｄｔは実質的に大きくなる。そのため、気液分離室内軸方向気相上昇速度ｕａは低下し、液滴は下方に落下し易くなる。したがって、液滴は気相出口管から流出され難くなり、高性能な気液分離装置を提供できる。
本発明（７）によれば、気相出口管を気液分離装置の上部に設け、気相出口管の下部は入り口仕切り体の上部に流体動通可能な状態で接続することにより、気相出口管が気液分離室を貫通することは無く、溝頂点仮想円の径Ｄｔ内全体が気液分離室内軸方向気相上昇流路となるため、気相上昇速度ｕａは低下し、液滴は下方に落下し易くなる。したがって、液滴は気相出口管から流出され難くなり、高性能な気液分離装置を提供できる。
本発明（８）によれば、前記発明（１）から（５）の効果に加え、前記発明（６）の効果が得られ、コンパクトで高性能な気液分離装置を提供できる。
本発明（９）によれば、前記発明（１）から（６）の効果に加え、前記発明（７）の効果が得られ、コンパクトで高性能な気液分離装置を提供できる。
本発明（１０）、本発明（１１）によれば、前記発明（１）から前記発明（９）の効果が得られる他、蒸発器での圧力損失を抑えることができ、圧縮動力が節減でき高効率な運転を可能に出来る冷凍装置を提供できる。
本発明（１２）によれば、前記発明（１）から前記発明（９）の効果が得られる他、冷凍サイクルへの冷凍機油の流出を防止できるので、高効率および高信頼性運転を可能に出来る冷凍装置を提供できる。 The present invention uses a secondary flow in a gas-liquid separation device that separates a gas-liquid two-phase flow through a narrow groove and separates the gas phase and the liquid phase in order to capture as much as possible the droplets carried on the gas phase. In addition, by tilting the groove and making the entire cross-sectional area of the gas-liquid separation chamber into an axial gas-phase ascending flow path, it is possible to efficiently capture droplets transported to the gas phase. Of course, it is possible to provide a gas-liquid separation device that can follow the downsizing of the device, and can greatly contribute to the improvement of the cooling performance of the refrigeration device.
The present invention may have the following configuration.
The present invention (1) provides a gas-liquid separator and an oil separator having appropriate specifications for capturing droplets in a groove with respect to required operating conditions and refrigerant flow rate, and generates a strong secondary flow. In order to capture the droplet by the effect of the centrifugal force, the grooved body is provided with a substantially wave shape inclined.
In the present invention (2), a strong secondary flow is generated to capture the droplet in the groove, and the captured droplet is caused to flow down by utilizing the centrifugal force and the gravity force of the flow. Furthermore, the substantially wave shape inclined in the flow direction provided on the surface of the grooved body is formed so as to spread outward in the radial direction in the flow direction.
In the present invention (3), a strong secondary flow is generated in order to capture the droplet in the groove, and the captured droplet is caused to flow down by utilizing the centrifugal force and the gravity force of the flow. Further, the present invention is characterized in that a substantially wave shape inclined in the flow direction provided on the surface of the grooved body is formed to spread toward the end of the flow direction.
The present invention (4) is the gas-liquid separation device according to any one of the inventions (1) to (3), wherein the two-phase flow flowing inside the grooved body is prevented from escaping radially inward. Also, a partition cylinder is provided.
The present invention (5) is the gas-liquid separation device according to any one of the inventions (1) to (4), wherein the length L of the grooved body and the pitch p of the grooved body are used in order to capture droplets in the groove. , when the main flow velocity u flowing through slotted body, the droplet diameter d, vapor viscosity coefficient mu _G, vapor density [rho _G, and the liquid phase density [rho _L,

It is characterized by that.
According to the present invention (6), in order to capture the droplet as much as possible in the groove and to prevent the droplet from flowing out from the gas phase outlet pipe even if the droplet gets on the gas phase and flows out of the groove, Is provided at an angle α with respect to the center line of the outer body.
In the present invention (7), after the droplet is captured as much as possible in the groove, even if the droplet rides on the gas phase and flows out of the groove, the droplet does not easily flow out from the gas phase outlet pipe. A gas-phase outlet pipe is installed at the upper part of the gas-liquid separator, and the lower part of the gas-phase outlet pipe is connected to the upper part of the inlet partition so that fluid can move. It is characterized by having a flow path.
The present invention (8) is the gas-liquid separation device according to any one of the inventions (1) to (5), wherein the droplets are captured as much as possible in the groove, and further, the droplets get on the gas phase and flow out of the groove. Also, in order to make it difficult for liquid droplets to flow out from the gas phase outlet pipe, the groove is provided with an angle α inclined with respect to the center line of the outer body.
The present invention (9) is the gas-liquid separation device according to any one of the inventions (1) to (6), wherein after the droplet is captured as much as possible in the groove, the droplet should flow on the gas phase and flow out of the groove. However, in order to make it difficult for liquid droplets to flow out of the gas-phase outlet pipe, the gas-phase outlet pipe is provided at the upper part of the gas-liquid separator, and the lower part of the gas-phase outlet pipe can be fluidly communicated with the upper part of the inlet partition. It connects in the state, and makes the whole gas-liquid separation chamber cross-sectional area the axial direction vapor-phase ascending flow path.
The present invention (10) is a refrigeration apparatus equipped with the gas-liquid separation device, wherein the gas-liquid separation device of the inventions (1) to (9) is incorporated in a refrigeration cycle such as an air conditioner.
In the present invention (11), an outlet pipe of a decompressor in the refrigeration cycle is connected to the two-phase inlet pipe of the gas-liquid separator of the inventions (1) to (9), and the liquid-phase outlet of the gas-liquid separator A refrigerating apparatus in which a pipe is connected to a pipe line leading to an evaporator, while a gas-phase outlet pipe of a gas-liquid separator is connected to a suction pipe of a compressor via a bypass path and a resistance adjuster. .
According to the present invention (12), a compressor discharge pipe in a refrigeration cycle is connected to the two-phase inlet pipe of the gas-liquid separator of the inventions (1) to (9), and the liquid-phase outlet pipe of the gas-liquid separator Is connected to the compressor suction pipe through a flow rate adjusting throttle, while the gas-phase outlet pipe of the gas-liquid separator is connected to a pipe line leading to the condenser of the refrigeration cycle.
According to the present invention (1), a strong secondary flow can be generated in the space sandwiched between the grooved bodies by providing a substantially wave shape having an inclination angle on the surface of the grooved body. . Further, since this secondary flow becomes a flow in a very narrow space sandwiched between the grooved bodies, the radius of curvature of the streamline can be made very small. This makes it possible to apply a very strong centrifugal force to the droplet. In addition, since the surface area of the grooved body per volume of the gas-liquid separator can be compactly mounted, the droplet capture area per volume can be increased, so that a very compact gas-liquid separator can be configured. it can.
According to the present invention (2), a strong secondary flow is generated by forming the substantially wave shape inclined in the flow direction provided on the surface of the grooved body so as to spread outward in the radial direction in the flow direction. Thus, the liquid droplets captured by the effect of the centrifugal force can be effectively flowed down along the wall surface using the shearing force and gravity of the flow without scattering again as the liquid droplets.
According to the present invention (3), the substantially wave shape inclined in the flow direction provided on the surface of the grooved body is formed in a divergent direction in the flow direction, so that a strong secondary flow is generated and the centrifugal The droplets captured by the effect of the force can be effectively flowed down along the wall surface using the shear force and gravity of the flow without scattering again as droplets.
According to the present invention (4), the partition cylinder is also provided inside the grooved body, so that the two-phase flow flowing inside the grooved body can be effectively grooved without escaping radially inward. It can collide with the body wall and capture it.
According to the present invention (5), the length L of the grooved body, the pitch p of the grooved body, the main flow velocity u flowing through the grooved body, the droplet diameter d, the gas phase viscosity coefficient μ _G , and the gas phase density ρ _G When the liquid phase density ρ _L ,

By doing so, it is possible to secure a secondary flow and a capture distance that are strong enough to capture droplets.
According to the present invention (6), the following three effects can be obtained by providing the groove with an angle α with respect to the center line of the outer shell. The first effect is that the groove width b ′ becomes smaller than the groove width b when the groove is not inclined by inclining the groove. When the gas phase flows in the groove, the droplets carried on the gas phase tend to collide with the surface of the groove and become a liquid film as the groove width decreases, so tilt the groove to make the actual groove width smaller. As a result, gas-liquid separation performance can be improved. The second effect is that the groove is inclined at an angle α, so that the flow direction of the gas phase coming out of the groove flows into the gas-liquid separation chamber with an angle α. Therefore, a swirling flow is generated in the gas-liquid separation chamber by having the angle α from all the grooves opened in the gas-liquid separation chamber and flowing into the gas-liquid separation chamber. Fine droplets that flow out of the groove on the gas phase easily gather in the space inside the gas-liquid separation chamber near the opening of the groove due to the centrifugal force due to the swirling flow. The probability of becoming increased. As the droplet diameter d increases, the droplets easily fall downward. Therefore, it is difficult for the droplets to flow out from the gas phase outlet pipe 6, and a high-performance gas-liquid separation device can be provided. The third effect is that by tilting the groove in a state where the substantial length h of the groove is constant, the groove depth h ′ perpendicular to the groove bottom surface is smaller than the groove depth h when not tilting. Therefore, by tilting the groove, the diameter Dt of the groove vertex virtual circle is substantially increased. For this reason, the gas-liquid separation chamber axial vapor phase rising speed ua decreases, and the droplets easily fall downward. Therefore, it is difficult for the droplets to flow out from the gas phase outlet pipe, and a high-performance gas-liquid separation device can be provided.
According to the present invention (7), the gas phase outlet pipe is provided in the upper part of the gas-liquid separation device, and the lower part of the gas phase outlet pipe is connected to the upper part of the inlet partitioning body in a fluid-movable state. The outlet pipe does not penetrate the gas-liquid separation chamber, and the entire inside of the diameter Dt of the groove apex virtual circle becomes the gas-phase separation chamber axial gas-phase ascending flow path. Can easily fall down. Therefore, it is difficult for the droplets to flow out from the gas phase outlet pipe, and a high-performance gas-liquid separation device can be provided.
According to the present invention (8), in addition to the effects of the inventions (1) to (5), the effect of the invention (6) can be obtained, and a compact and high-performance gas-liquid separator can be provided.
According to the present invention (9), in addition to the effects of the inventions (1) to (6), the effect of the invention (7) can be obtained, and a compact and high-performance gas-liquid separator can be provided.
According to the present invention (10) and the present invention (11), in addition to the effects of the invention (1) to the invention (9), pressure loss in the evaporator can be suppressed, and compression power can be reduced. It is possible to provide a refrigeration apparatus that enables highly efficient operation.
According to the present invention (12), in addition to the effects of the invention (9) from the invention (1), it is possible to prevent the refrigerating machine oil from flowing out into the refrigeration cycle, thereby enabling high efficiency and high reliability operation. A refrigeration apparatus that can be provided can be provided.

It is sectional drawing of the gas-liquid separation apparatus of 1st Embodiment. It is AA sectional view taken on the line of the gas-liquid separator shown in FIG. FIG. 3 is a developed perspective view of the grooved body shown in FIG. 2. It is a perspective view which shows 1 pitch of the grooved body which provided the substantially wave shape inclined with respect to the mainstream shown in FIG. It is sectional drawing of the gas-liquid separation apparatus of 2nd Embodiment. FIG. 6 is a developed perspective view of a grooved body provided with a substantially wave shape spreading toward the end with respect to the mainstream shown in FIG. 5. It is a perspective view which shows 1 pitch of the grooved body which provided the substantially wave shape which spreads toward the mainstream shown in FIG. It is sectional drawing of the gas-liquid separation apparatus of 3rd Embodiment. It is BB sectional drawing of the gas-liquid separator shown in FIG. FIG. 8 is a cross-sectional view of the grooved body shown in FIGS. 4 and 7. It is a figure showing the adhesion model to the wall surface of a droplet. It is a figure which shows the dimensionless length of the grooved body calculated | required by calculation. It is sectional drawing which shows the gas-liquid separation apparatus of 4th Embodiment. It is AA sectional drawing of the gas-liquid separator shown in FIG. FIG. 14 is a developed perspective view of the grooved body shown in FIG. 13. It is a principle model figure which shows the effect which inclined and provided the groove | channel 2. It is a partially expanded sectional view of another grooved body. It is sectional drawing which shows the gas-liquid separation apparatus of 5th Embodiment. It is BB sectional drawing of FIG. It is AA sectional drawing of FIG. FIG. 19 is a developed perspective view of the grooved body shown in FIG. 18. FIG. 10 is a first refrigeration cycle configuration diagram when the above-described gas-liquid separation device is used in a refrigeration cycle as a sixth embodiment. FIG. 10 is a second refrigeration cycle configuration diagram when the above-described gas-liquid separation device is used in a refrigeration cycle as a seventh embodiment. FIG. 10 is a third refrigeration cycle configuration diagram when the above-described gas-liquid separator is used in a refrigeration cycle as an eighth embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Gas-liquid separation chamber 2 ... Groove 3 ... Rapid expansion part 4 ... Grooved body 5 ... Inlet pipe 6 ... Gas-phase outlet pipe 7 ... Liquid phase outlet pipe 8 ... Outlet partition body 9 ... Groove vertex virtual circle 10 ... Outer body DESCRIPTION OF SYMBOLS 11 ... Outer body B 12 ... Narrow space 13 ... Lower contraction pipe part 14 ... Droplet 15 ... Center line 16 ... Entrance partition 17 ... Upper contraction pipe part 18 ... Liquid reservoir 19 ... Inflow chamber 20 ... Secondary flow 21 ... Air Phase inflow end 22 ... Communication hole 23 ... Flow direction of gas phase coming out of groove 24 ... Swirl flow 25 ... Axial gas phase rising speed Ua 26 ... Bead 27 ... Compressor 28 ... First cylinder 29 ... Second cylinder 30 ... discharge pipe 31 ... condenser 32 ... condenser blower 33 ... first decompressor 34 ... second decompressor 35 ... evaporator 36 ... evaporator blower 37 ... partition cylinder 38 ... evaporator bypass pipe 39 ... outdoor unit 40 ... Indoor unit 41 ... Refrigerant discharge pipe 42 ... Liquid receiver 43 ... Gas-liquid Separator 45 ... Flow rate adjusting throttle 46 ... Compressor suction pipe 47 ... Four-way valve 48 ... Connection piping

Claims (8)

A grooved body with a groove toward the liquid-phase outlet pipe is provided in a part of the gas-liquid separation chamber, and a narrow space is formed upstream of the gas-liquid separation chamber with an outer body and an inlet partition, and led from the inlet pipe. After the gas-liquid two-phase flow passes through the narrow space, the gas-liquid two-phase flow is guided from the grooved body to the gas-liquid separation chamber, and the gas-liquid two-phase flow is guided to the liquid-phase outlet pipe through the grooved body. In the gas-liquid separation device characterized in that the phase has a gas-liquid separation mechanism that leads from the gas-liquid separation chamber to the gas-phase outlet pipe, the groove extends from the inner surface of the outer body to the line toward the center line of the outer body. with kicking angle α inclined against, and the angle θ inclined substantially wave shape with respect to the flow direction of the surface of the grooved body, and radial with respect to the flow direction angle θ inclined substantially wave shape with respect to the flow direction A gas-liquid separator characterized by being formed so as to spread outward in the direction . In the gas-liquid two-phase flow guided to the grooved body through the narrow space, the liquid phase flows down the grooved body toward the liquid phase outlet pipe, and at least a part of the gas phase is directed to the outlet partition body. 2. The gas-liquid separation device according to claim 1, wherein the gas-liquid separation device is directed to a gas-phase outlet pipe provided at an upper portion of the gas-liquid separation chamber after being guided to the gas-liquid separation chamber without passing through the provided communication hole.   The gas-liquid separator according to claim 1, wherein the position of the grooved body is defined by one or more members selected from the group consisting of an inlet partition, an outer shell, an outlet partition, and a partition cylinder. A gas phase outlet pipe is provided in the upper part of the gas-liquid separator, and the lower part of the gas phase outlet pipe is connected to the upper part of the inlet partition in a fluid-conducting state and the lower end of the gas phase outlet pipe is below the narrow space. The gas-liquid separator according to claim 1, wherein the gas-liquid separator is not protruded. A gas-liquid separation device in which the inflow chamber and the gas-liquid separation chamber are partitioned by the outer body and the inlet partition, and the inflow chamber is positioned above the gas-liquid separation chamber, and the gas-liquid led from the inlet pipe By allowing a two-phase flow to flow into the inflow chamber from the side of the outer body to swirl the gas-liquid two-phase flow in the inflow chamber, and providing a gas phase outlet pipe at the top of the gas-liquid separator, The gas-liquid separator according to any one of claims 1 to 4, wherein a gas phase passes through an inlet pipe and is guided to an upper portion of the gas-liquid separator. A refrigeration apparatus comprising a gas-liquid separation apparatus, wherein the gas-liquid separation apparatus according to any one of claims 1 to 5 is incorporated in a refrigeration cycle such as an air conditioner. The outlet pipe of the decompressor in the refrigeration cycle is connected to the two-phase inlet pipe of the gas-liquid separator according to any one of claims 1 to 5 , and the liquid-phase outlet pipe of the gas-liquid separator is evaporated. A refrigeration apparatus comprising: a gas-liquid separation apparatus connected to a pipe line leading to a compressor; and a gas-phase outlet pipe of the gas-liquid separator connected to a suction pipe of a compressor via a bypass path and a resistance adjuster. A compressor discharge pipe in the refrigeration cycle is connected to the two-phase inlet pipe of the gas-liquid separator according to any one of claims 1 to 5 , and the flow rate of the liquid-phase outlet pipe of the gas-liquid separator is adjusted. A refrigerating apparatus characterized in that it is connected to a compressor suction pipe through a throttle, and the gas-phase outlet pipe of the gas-liquid separator is connected to a pipe line leading to a condenser of a refrigeration cycle.

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