Patent Description:
A scroll compressor is a positive displacement compressor with high efficiency, low noise and stable operation, and is widely used in an automotive air conditioning system as a third generation of an on-board compressor. Recently, with the development of new energy vehicles, requirements for noise, vibration and durability of an automotive air-conditioning scroll compressor are further increased. Here, during the use of the scroll compressor, a refrigeration oil needs to be supplied to lubricate a friction pair in the scroll compressor, so as to reduce a noise generated by the friction pair during its operation. In the related art, as shown in FIG. <NUM>, an oil separation structure <NUM> is disposed in the scroll compressor to separate a mixed fluid of a refrigerant and an oil discharged from a compression chamber <NUM> of the scroll compressor, and a storage tank <NUM> is provided below the oil separation structure <NUM> to store the refrigeration oil separated by the oil separation structure <NUM>. Meanwhile, a throttling oil return structure <NUM> is provided between the oil storage tank <NUM> and an oil return channel <NUM> of the scroll compressor, an oil return hole <NUM> is defined at a bottom of the oil storage tank <NUM> to be connected to the throttling oil return structure <NUM>, so that the refrigeration oil in the oil storage tank <NUM> is finally returned to the oil return channel <NUM> of the scroll compressor through the throttling oil return structure <NUM>, so as to lubricate each friction pair in the scroll compressor.

However, in the actual using process, since an oil discharging hole <NUM> of the oil separation structure <NUM> is disposed to directly face towards the oil storage tank <NUM>, a fluid discharged from the oil separation structure <NUM> may wash out the refrigeration oil in the oil storage tank <NUM>, so that the refrigeration oil in the oil storage tank <NUM> will churn due to an impact, which causes a through hole of the oil storage tank <NUM> in communication with the throttling oil return structure <NUM> not to be completely immersed by the refrigeration oil. Thus, a refrigerant will leak directly from the throttling oil return structure <NUM> to a suction side of the scroll compressor, which in turn causes a decrease in a cooling capacity of the scroll compressor. In addition, when leaking through the throttling oil return structure <NUM>, the refrigerant occupies a fluid delivery space of the throttling oil return structure <NUM>, which results in a reduction in the refrigeration oil delivered to the oil return channel <NUM> through the throttling oil return structure <NUM>. In addition, the churning of the refrigeration oil will also cause the refrigerant to be mixed and dissolved in the refrigeration oil again. Thus, a proportion of the refrigeration oil in the oil storage tank <NUM> will decrease, thereby further reducing the proportion of the refrigeration oil in a return oil, resulting in that the friction pair cannot be effectively lubricated, and the scroll compressor power consumption increases, thereby decreasing compression efficiency and occurring functional failures even in severe cases.

<CIT> provides a scroll compressor comprising a housing formed by a front, a center and a rear housing member, an oil separation chamber in the housing, an auxiliary and a main oil reservoir chamber, wherein the auxiliary oil reservoir chamber is located higher than the main oil reservoir chamber with respect to the direction of gravity. The refrigerant and the lubricant oil are separated in the oil separation chamber, and the refrigerant is discharged to the outside of the housing via an outlet hole, while the lubricant oil is supplied through an introducing passage into the auxiliary oil reservoir chamber, and then supplied through a drain port into the main oil reservoir chamber under gravity.

<CIT> also discloses a scroll compressor comprising a housing formed by a front, a center and a rear housing member, an oil separation compartment in the housing and an oil reservoir, wherein a supply passage extending diagonally upwards from the oil separation compartment is provided to connect the oil separation compartment and the oil reservoir. The refrigerant and the lubricant oil are separated in the oil separation compartment, and the refrigerant is discharged to the outside of the housing via an outlet, while the lubricant oil is supplied through the supply passage into the oil reservoir.

The compressor provided in <CIT> comprises a housing, an oil separating cylinder separating lubricating oil contained in the refrigerant gas, and a discharge chamber where the separated lubricating oil is accumulated. An oil passage is provided connecting the oil separating cylinder and the discharge chamber, wherein a discharge port of the oil passage is located above an inlet port of the oil passage. Furthermore, an outlet is provided on the housing, through which the refrigerant gas is sent out of the compressor, and the discharge chamber is in communication with the outlet.

Embodiments of the present disclosure provide a scroll compressor, a refrigeration device and a vehicle, which aim at solving at least the technical problem of insufficient lubrication of the friction pair of the scroll compressor in the related art, which achieves increased power consumption and reduced compression efficiency of the scroll compressor.

In order to solve at least the above-mentioned technical problems, embodiments of the present disclosure provide a scroll compressor includes a housing. The housing has an oil separation structure, an oil storage tank, and an oil outlet channel that are provided therein. The oil outlet channel has an oil inlet and an oil outlet located above the oil inlet. The oil inlet is in communication with an oil discharging hole of the oil separation structure, and the oil outlet is in communication with the oil storage tank.

According to the present invention, the housing also has a refrigerant outlet defined thereon, and the oil storage tank has a vent hole defined on a wall thereof for discharging a refrigerant and in communication with the refrigerant outlet; and wherein the vent hole penetrates a wall between the oil separation structure and the oil storage tank.

In some embodiments, the oil outlet channel has a flow area gradually increasing in a direction from the oil inlet to the oil outlet.

In some embodiments, the oil outlet channel is a curved channel having at least one curved section.

In some embodiments, the oil storage tank has a plurality of ribs provided on a wall thereof and arranged at an interval, and each of the plurality of ribs has an end facing towards a top of the oil storage tank and an other end facing towards a bottom of the oil storage tank.

In some embodiments, the oil outlet is arranged facing away from the bottom of the oil storage tank.

In some embodiments, the oil outlet is arranged towards the bottom of the oil storage tank, and the oil storage tank has a buffer portion provided on a wall thereof and located below the oil outlet. A gap is defined between the buffer portion and the wall of the oil storage tank.

In some embodiments, the oil outlet channel is an oil outlet pipe. The oil outlet pipe includes an introduction section and a discharging section connected to the introduction section. An end of the introduction section away from the discharging section is formed as the oil inlet, and an end of the discharging section away from the introduction section is formed as the oil outlet.

In some embodiments, the scroll compressor also includes a stationary scroll disk, and a side wall of the stationary scroll disk facing towards the oil separation structure has a first communication slot and a second communication slot. The oil discharging hole is connected to the oil inlet via the first communication slot, and the vent hole is connected to the refrigerant outlet via the second communication slot.

In some embodiments, the scroll compressor also includes a seal attached to an end surface of the stationary scroll disk facing towards the oil separation structure. The end surface of the stationary scroll disk facing towards the oil separation structure has a recess defined thereon, and the recess has openings defined at two ends thereof and formed as the oil outlet and the oil inlet, respectively. The oil outlet channel is defined by the recess and the seal.

In some embodiments, the scroll compressor also includes a seal attached to an end surface of the stationary scroll disk facing towards the oil separation structure. An end surface of the stationary scroll disk facing away from the oil separation structure has a recess defined thereon, and the recess has openings defined at two ends thereof and formed as the oil outlet and the oil inlet, respectively. The oil outlet channel is defined by the recess and the end surface of the stationary scroll disk.

In some embodiments, the housing includes an oil separation shell having a connection surface. The connection surface matches with and is connected to an end surface of the stationary scroll disk facing towards the oil separation structure. The connection surface has a recess defined thereon, and the recess has openings defined at two ends thereof and formed as the oil outlet and the oil inlet, respectively. The end surface of the stationary scroll disk is attached to the connection surface. The oil outlet channel is defined by the end surface of the stationary scroll disk and the recess.

In some embodiments, the oil separation housing also has an accommodation groove provided therein and accommodating the recess. The oil storage tank is defined by an inner wall surface of the accommodation groove and an outer wall surface the recess.

In some embodiments, the oil separation shell also has a connection channel defined therein, and the connection channel allows a precipitated refrigerant to flow therethrough. The connection channel has an inlet connected to the oil outlet, an outlet connected to the vent hole, and a wall connected to the wall of the oil storage tank.

In some embodiments, the wall of the connection channel has an oil blocking portion provided thereon, and a gap is formed between the oil blocking portion and an end surface of the oil outlet.

In some embodiments, the oil separation structure includes an oil separation chamber disposed in the oil separation shell, and the oil discharging hole and the refrigerant outlet are arranged on a wall of the oil separation chamber. The wall of the oil separation chamber also has an oil separation inlet defined thereon, and the stationary scroll disk has a mixed fluid outlet defined thereon and in communication with the mixed fluid outlet.

Another technical solution employed in embodiments of the present disclosure is a refrigeration device including the scroll compressor as described above.

Another technical solution employed in embodiments of the present disclosure is a vehicle including the refrigeration device as described above.

The above one or more technical solutions of the scroll compressor according to the embodiments of the present disclosure have at least one of the following technical effects. In the scroll compressor according to the embodiments of the present disclosure, by providing the oil outlet channel in the housing, communicating the oil inlet of the oil outlet channel with the oil discharging hole of the oil separation structure, and communicating the oil outlet of the oil outlet channel with the oil storage tank, the refrigeration oil discharged from the oil separation structure can first enter the oil outlet channel through the oil inlet, and then flow into the oil storage tank through the oil outlet of the oil outlet channel. Since the oil outlet of the oil outlet channel is arranged above the oil inlet, the refrigeration oil entering the oil outlet channel flows against the direction of gravity and then is discharged through the oil outlet. In this way, the outflow pressure and outflow velocity of the refrigeration oil can be effectively reduced. Thus the flow rate and the pressure of the refrigeration oil discharged from the outlet are reduced, and the impact of the refrigeration oil on the refrigeration oil in the oil storage tank is reduced when the refrigeration oil is discharged, so that the refrigeration oil in the oil storage tank can be maintained stable, and the refrigeration oil in the oil storage tank does not churn due to the inflow of the refrigeration oil. Therefore, the effective oil storage volume and oil storage capacity of the oil storage tank can be increased. Meanwhile, the refrigeration oil in the oil storage tank remains stable, and it is also possible to ensure that the oil return hole is always submerged by the refrigeration oil, thereby preventing the refrigerant from leaking into the oil return channel through the oil return hole. Thus, it is possible to ensure that the scroll compressor has sufficient oil return, and a friction pair of the scroll compressor can be effectively lubricated, thereby improving the compression efficiency of the scroll compressor.

In the refrigeration device according to the embodiments of the present disclosure, by using the scroll compressor as described above, since the oil outlet channel is disposed in the housing of the scroll compressor and the oil outlet channel can guide the refrigeration oil to flow against the direction of gravity, the outflow velocity and the outflow pressure can be reduced when the refrigeration oil is discharged into the oil storage tank, thereby reducing the impact on the refrigeration oil in the oil storage tank when the refrigeration oil is discharged, and ensuring that the refrigeration oil in the oil storage tank remains stable. Thus, the effective oil storage volume of the oil storage tank can be increased, and the oil return hole of the oil storage tank is always submerged by the refrigeration oil, which preventing the refrigerant from leaking directly into the oil return channel of the scroll compressor through the oil return hole. Therefore, the scroll compressor has sufficient oil return and improved compression efficiency, thereby optimizing the refrigeration capacity of the refrigeration device.

In the vehicle according to the embodiments of the present disclosure, by using the refrigeration device as described above, during the refrigeration of the vehicle, since the refrigeration capacity and refrigeration efficiency of the refrigeration device can always be maintained at a higher level, the cooling time inside the vehicle can be effectively shortened. Thus, the cooling speed of the vehicle is boosted, thereby improving vehicle use experience.

In order to illustrate the technical solutions in the embodiments of the present disclosure more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or exemplary technologies. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings may also be obtained according to these drawings without any inventive step.

The reference numerals shown in the figures are described as follows:
<NUM>-housing; <NUM>-oil separation structure; <NUM>-oil separation shell; <NUM>-connection surface; <NUM>-accommodation groove; <NUM>-connection channel; <NUM>-oil blocking portion; <NUM>-oil blocking surface; <NUM>-oil separation chamber; <NUM>-oil discharging hole; <NUM>-rectification chamber; <NUM>-oil separation inlet; <NUM>-mixed fluid inlet; <NUM>-streamlined wall surface; <NUM>-oil separation tube; <NUM>-intake end; <NUM>-outtake end; <NUM>-oil storage tank; <NUM>-oil return hole; <NUM>-vent hole; <NUM>-rib; <NUM>-oil outlet channel; <NUM>-oil inlet; <NUM>-oil outlet; <NUM>- introduction section; <NUM>-discharging section; <NUM>-refrigerant outlet; <NUM>-stationary scroll disk; <NUM>-first communication slot; <NUM>-second communication slot; <NUM>-mixed fluid outlet; <NUM>-seal; <NUM>-advoiance position; <NUM>-groove; <NUM>- orbiting scroll disk; <NUM>-oil return channel; <NUM>-compression chamber; <NUM>-throttling oil return structure; <NUM>- suction port; <NUM>- suction chamber; <NUM>-compression mechanism; <NUM>-driving mechanism.

In order to make the technical problems to be solved, technical solutions and beneficial effects in the present disclosure clearer, the present disclosure will be described in further detail below with reference to the accompanying drawings including FIGS. <NUM> to <NUM> and the embodiments. It should be understood that the exemplary embodiments described herein are only used to explain the present disclosure, rather than limiting the present disclosure.

It should be noted that, in the description of this application, when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly or indirectly on another element. When an element is referred to as being "connected to" another element, it may be directly or indirectly connected to another element.

It should to be understood that the orientation or positional relationship by terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying a device or an element must have a particular orientation, be constructed and operate in a particular orientation, therefore it should not be construed as a limitation on the present disclosure.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that features. In the description of the present disclosure, "a plurality of" means two or more, unless otherwise expressly and In some embodiments defined.

Reference in this specification to "one embodiment," "some embodiments," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the disclosure. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. throughout the specification are not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise In some embodiments emphasized.

In order to illustrate the technical solutions described in the present disclosure, a detailed description is given below with reference to the specific drawings and embodiments.

As shown in FIGS. <NUM> to <NUM>, an embodiment of the present disclosure provides a scroll compressor. As shown in <FIG>, the scroll compressor includes a housing <NUM>, a suction port <NUM>, a compression mechanism <NUM>, a driving mechanism <NUM>, and a refrigerant outlet <NUM> and the like.

Here, the compression mechanism <NUM> may include, but is not limited to, an orbiting scroll disk <NUM>, a stationary scroll disk <NUM>, and an anti-rotation structure. The stationary scroll disk <NUM> may include an end plate and a stationary scroll, and the orbiting scroll disk <NUM> may include an end plate and an orbiting scroll. The stationary scroll and the orbiting scroll are engaged with each other, thereby defining a compression chamber <NUM> of the scroll compressor (i.e., a working chamber of the scroll compressor) between the stationary scroll and the orbiting scroll. The anti-rotation device is used to limit a rotation of the orbiting scroll disk <NUM> and to allow the orbiting scroll disk <NUM> to perform a rotational and translational motion relative to the stationary scroll disk <NUM>. The driving mechanism <NUM> may include, but is not limited to, a crankshaft and a motor composed of a stator and a rotor. The crankshaft may rotate integrally with the rotor, and an eccentric pin suitable for driving the orbiting scroll disk <NUM> may be provided at an upper end of the crankshaft. The rotor is capable of driving the orbiting scroll disk <NUM> to rotate by the eccentric pin. The suction port <NUM> is defined on the housing <NUM> and is in communication with a refrigerant supply port of an external working circuit (such as an outlet of a system evaporator, etc.). The housing <NUM> further has a suction chamber <NUM> defined therein, and the suction chamber <NUM> communicates the suction port <NUM> with the compression chamber <NUM>, and a low-pressure refrigerant (a working fluid) from the external working circuit of the housing <NUM> (such as the system evaporator, etc.) is sucked through the suction port <NUM>, and enters a compression mechanism <NUM> through the suction chamber <NUM> for compression. The housing <NUM> has an oil separation structure <NUM> and an oil storage tank <NUM> provided therein. A mixed fluid of a refrigerant and a refrigeration oil discharged from the compression chamber <NUM> is output to the oil separation structure <NUM> for an oil and gas separation. A refrigerant outlet <NUM> is defined on the housing <NUM>. A high-pressure refrigerant separated by the oil separation structure <NUM> is discharged to the external working circuit of the scroll compressor (such as, an inlet of the system evaporator, etc.) through the refrigerant outlet <NUM>. The refrigeration oil separated by the oil separation structure <NUM> is discharged from an oil discharging hole <NUM>, and flows and is stored in the oil storage tank <NUM>. An oil storage region is formed in the oil storage tank <NUM>. Here, the oil storage region refers to a region where the refrigeration oil is stored in the oil storage tank <NUM> when the scroll compressor of this embodiment is used. A wall of the oil storage tank <NUM> has an oil return hole <NUM> for discharging the refrigeration oil. The oil return hole <NUM> is located in an oil outlet region. In some embodiments, the oil return hole <NUM> may be, but is not limited to, disposed at the bottom of the oil storage tank <NUM>. The housing <NUM> also has an oil return channel <NUM> in communication with the oil return hole <NUM>. A throttling oil return structure <NUM> is provided between the oil return channel <NUM> and the oil storage tank <NUM>, and the refrigeration oil in the oil storage tank <NUM> is delivered into the oil return channel <NUM> through the throttling oil return structure <NUM> to lubricate each of friction pairs of the scroll compressor.

When the scroll compressor is operated and the motor is energized, the rotor rotates to drive the crankshaft to rotate synchronously. The crankshaft is capable of driving the orbiting scroll disk <NUM> to perform the rotational and translational motion by the eccentric pin. Meanwhile, the refrigerant, that is, the working fluid, enters the suction chamber <NUM> of the compression mechanism <NUM> through the suction port <NUM>, and is further sucked into the compression chamber <NUM> from the suction chamber <NUM> as the orbiting scroll disk <NUM> continues to perform the rotational and translational motion. At this time, the refrigerant in the compression chamber <NUM> is compressed to increase the pressure. When the refrigerant is compressed to a predetermined compression ratio, the refrigerant is discharged from the compression chamber <NUM>. For example, a mixed fluid outlet <NUM> is defined on the stationary scroll disk <NUM>, and the refrigerant is discharged through the mixed fluid outlet <NUM>. During compressing the refrigerant, the refrigeration oil for lubricating the friction pair will be carried by the refrigerant and enter the compression chamber <NUM>. Therefore, the fluid discharged from the mixed fluid outlet <NUM> of the stationary scroll disk <NUM> is a mixed fluid of the refrigerant and refrigeration oil, and the discharged mixed fluid needs to be treated to be separated into the refrigerant and the refrigeration oil. In this way, the mixed fluid of the refrigerant and the refrigeration oil will be delivered to the oil separation structure <NUM> to be separated into the refrigerant and the refrigeration oil. The resulted refrigerant is discharged from the refrigerant outlet <NUM> to the scroll compressor, and the resulted refrigeration oil enters the oil storage tank <NUM>, and then flows into the throttling oil return structure <NUM> through the oil return hole <NUM>, and enters into the oil return channel <NUM> to lubricate the friction pair, thereby realizing a recycling of the refrigeration oil.

According to the invention, as shown in <FIG>, FIG. <NUM> and FIG. <NUM>, the housing <NUM> of the scroll compressor as described also has an oil outlet channel <NUM> defined therein. The oil outlet channel <NUM> is configured to guide the refrigeration oil discharged from the oil discharging hole <NUM> of the oil separation structure <NUM> to the oil storage tank12. The oil outlet channel <NUM> has an oil inlet <NUM> and an oil outlet <NUM> that are arranged opposite to each other. The oil outlet <NUM> is located above the oil inlet <NUM>. In some embodiments, the oil outlet <NUM> being located above the oil inlet <NUM> means that, in a direction of gravity, the oil outlet <NUM> is located directly above or obliquely above the oil inlet <NUM>. After the refrigeration oil flows into the oil outlet channel <NUM> from the oil inlet <NUM>, the refrigeration oil needs to flow against the direction of gravity before it can flow to be discharged from the oil outlet <NUM>. Here, the oil inlet <NUM> is in communication with the oil discharging hole <NUM> of the oil separation structure <NUM>, and is configured for an inflow of the refrigeration oil discharged from the oil discharging hole <NUM> of the oil separation structure <NUM>. The oil outlet <NUM> is in communication with the oil storage tank <NUM> to introduce the refrigeration oil into the oil storage tank12.

Further, according to the invention, the oil outlet <NUM> is located above the oil storage region of the oil storage tank <NUM>. In this way, by arranging the oil outlet <NUM> above the oil storage region, it is possible to ensure that the oil outlet <NUM> is always located above a level of the refrigeration oil in the oil storage tank <NUM>. Thus, as a storage capacity of the refrigeration oil in the oil storage tank <NUM> increases, the refrigeration oil will never submerge the oil outlet <NUM>, so as to prevent the oil outlet <NUM> from being positioned in the refrigeration oil to discharge the refrigeration oil, thereby avoiding air bubbles from being generated to result in a churning of the refrigeration oil when the refrigeration oil is discharged, or avoiding the air bubbles from entering the throttling oil return structure <NUM> through the oil return hole <NUM> to occupy an interior space of the throttling oil return structure <NUM>.

In the scroll compressor according to the invention, by forming the oil outlet channel <NUM> inside the housing <NUM> and communicating the oil inlet <NUM> of the oil outlet channel <NUM> with the oil discharging hole <NUM> of the oil separation structure <NUM> of the scroll compressor, and communicating the oil outlet <NUM> of the oil outlet channel <NUM> with the oil storage tank <NUM> of the scroll compressor, the refrigeration oil discharged from the oil discharging hole <NUM> of the oil separation structure <NUM> first enters the oil outlet channel <NUM> through the oil inlet <NUM>, and then flows into the oil storage tank <NUM> through the oil outlet <NUM> of the oil outlet channel <NUM>. An oil flow path is shown by the dashed arrows in <FIG>, <NUM> and <NUM>. Since the oil outlet <NUM> of the oil outlet channel <NUM> is positioned above the oil inlet <NUM> in the direction of gravity, the refrigeration oil entering the oil outlet channel <NUM> flowing against the direction of gravity. In this way, a pressure and a flow rate of the refrigeration oil can be effectively reduced. Thus, the flow rate and the pressure of the refrigeration oil discharged from the oil outlet <NUM> are reduced, and an impact on the remaining refrigeration oil in the oil storage tank <NUM> is reduced when the refrigeration oil is discharged, so that the refrigeration oil in the oil storage tank <NUM> can be maintained stable, and the refrigeration oil in the oil storage tank <NUM> would not be churned due to the oil flowing. Thus, an effective oil storage volume and oil storage capacity of the oil storage tank <NUM> can also be increased. Meanwhile, the refrigeration oil in the oil storage tank <NUM> can be maintained stable, and it is also possible to ensure that the oil return hole <NUM> is always submerged by the refrigeration oil, so as to prevent the refrigerant from directly leaking into the oil return channel <NUM> through the oil return hole <NUM>, thereby ensuring that the scroll compressor has sufficient oil return, and the friction pair of the scroll compressor is effectively lubricated, thereby improving the compression efficiency of the scroll compressor.

According to the invention, as shown in <FIG>, FIG. <NUM> and FIG. <NUM>, the housing <NUM> has the refrigerant outlet <NUM> defined thereon, and the refrigerant separated by the oil separation structure <NUM> is discharged through the refrigerant outlet <NUM>. Further, since the flow rate and the pressure of the refrigeration oil are reduced after flowing through the oil outlet channel <NUM>, the refrigerant partially dissolved in the refrigeration oil will precipitate. Thus, the oil storage tank <NUM> has a vent hole <NUM> defined on the wall thereof, and the precipitated refrigerant is discharged through the vent hole <NUM>. Further, the vent hole <NUM> is in communication with the refrigerant outlet <NUM> on the housing <NUM>, and the refrigerant precipitated from the refrigeration oil and entering the oil storage tank <NUM> is merged into the refrigerant outlet <NUM> through the vent hole <NUM> and discharged from the refrigerant outlet <NUM>. In this embodiment, a flow path of the refrigerant are shown by solid arrows in <FIG>, <NUM> and <NUM>. According to the invention, when the refrigeration oil flows out of the oil outlet channel <NUM>, the pressure of the refrigeration oil is reduced, so that the refrigerant dissolved in the refrigeration oil is precipitated, and the precipitated refrigerant is discharged through the vent hole <NUM> to prevent the refrigerant from retaining in the oil storage tank <NUM>, which achieves an increased internal pressure of the oil storage tank <NUM>, so that the precipitated refrigerant is dissolved in the refrigeration oil again. In some embodiments, the vent hole <NUM> is provided to discharge the refrigerant to ensure that a pressure Pk at the oil inlet <NUM> of the oil outlet channel <NUM> is always greater than a pressure Pd' at the oil outlet <NUM>. That is, a pressure difference (Pk-Pd'><NUM>) is formed between the oil outlet <NUM> and the oil inlet <NUM> of the oil outlet channel <NUM>, so as to ensure that the refrigeration oil can be discharged from the oil outlet <NUM> of the oil outlet channel <NUM> with the pressure difference. In this case, even the refrigeration oil flows against the direction of gravity, it can still flow out of the oil outlet <NUM> smoothly to avoid interruption or backflow.

In another embodiment of the present disclosure, as shown in <FIG>, FIG. <NUM> and FIG. <NUM>, the vent hole <NUM> and the oil return hole <NUM> are spaced apart from each other in the direction of gravity. The oil outlet channel <NUM> is arranged between the vent hole <NUM> and the oil return hole <NUM>, and the oil inlet <NUM> is arranged close to the oil return hole <NUM>. Further, the oil outlet <NUM> is also arranged close to the vent hole <NUM>. That is, the oil inlet <NUM> is located above the oil return hole <NUM>, and the vent hole <NUM> is located above the oil outlet <NUM>. In this way, by arranging the vent hole <NUM> above the oil outlet <NUM>, it is possible to prevent the refrigeration oil sprayed from the oil outlet <NUM> from entering the vent hole <NUM> when flowing along the wall of the oil storage tank <NUM> and being discharged through the vent hole <NUM> along with the refrigerant.

In another embodiment of the present disclosure, as shown in <FIG>, FIG. <NUM> and FIG. <NUM>, in a direction from the oil inlet <NUM> to the oil outlet <NUM> of the oil outlet channel <NUM>, a flow area of the oil outlet channel <NUM> gradually increases. That is, in a flow direction of the refrigeration oil, the flow area of the oil outlet channel <NUM> gradually increases. In this way, during the flow of the refrigeration oil along the oil outlet channel <NUM>, as the flow area gradually increase, the flow rate of the refrigeration oil gradually decreases, and a speed of the refrigeration oil when discharged from the oil outlet <NUM> decreases, thereby further reducing the impact on the level when the refrigeration oil is discharged from the oil outlet <NUM>. In addition, the flow rate of the refrigeration oil is slowed down, which can further increase a precipitation amount of the refrigerant during the flowing, thereby further reducing an amount of refrigerant dissolved in the refrigeration oil entering the oil storage tank <NUM> and increasing the proportion of the refrigeration oil entering the oil return channel <NUM> of the scroll compressor.

In some other embodiments, in the direction from the oil inlet <NUM> to the oil outlet <NUM>, the flow area of the oil outlet channel <NUM> can also be constant. That is, in the flow direction of the refrigeration oil, the flow area of the oil outlet channel <NUM> is constant. In this case, since the oil outlet channel <NUM> has a frictional resistance, the flow rate can also be gradually slowed down when the refrigeration oil flows through the oil outlet channel <NUM>.

In another embodiment of the present disclosure, as shown in <FIG>, FIG. <NUM> and FIG. <NUM>, the above oil outlet channel <NUM> is a curved channel with at least one curved section. By forming the oil outlet channel <NUM> into the curved channel with the curved section, the refrigeration oil can flow into the oil outlet channel <NUM> at a high velocity, and hit a channel wall when turning in the curved section. Thus, a local resistance of the refrigeration oil increases during the flowing, which can further reduce the flow rate and the pressure of the refrigeration oil. In this way, forming the oil outlet channel <NUM> with the curved section can reasonably utilize the area of the curved section to prolong a residence time of the refrigeration oil in the oil outlet channel <NUM>, such that more refrigerant dissolved in the refrigeration oil is precipitated. Meanwhile, the local resistance of oil outlet channel <NUM> can be increased, thereby effectively reducing the flow rate and the pressure of refrigeration oil.

Further, in this embodiment, the oil outlet channel <NUM> is formed into an L-shaped channel with one curved section, and the curved section of the L-shaped channel is rounded to avoid excessive impact of the refrigeration oil on the channel wall and wear of the channel. In other embodiments, the above oil outlet channel <NUM> may also be an S-shaped channel with several curved sections, etc., or other channels with one or more curved sections. Here, the specific form of the oil outlet channel <NUM> is not uniquely limited.

In another embodiment of the present disclosure, as shown in <FIG> and FIG. <NUM>, the oil storage tank <NUM> has a plurality of ribs <NUM> provided on the wall thereof, and the plurality of ribs <NUM> is arranged at intervals. Further, one end of each of the plurality of ribs <NUM> is arranged to face towards the top of the oil storage tank <NUM>, and the other opposite end of each of the plurality of ribs <NUM> is arranged to face towards the bottom of the oil storage tank <NUM>. That is, the plurality of ribs <NUM> extend from one end of the oil storage tank <NUM> to the other opposite end in the direction of gravity. By arranging the plurality of ribs <NUM> on the wall of the oil storage tank <NUM>, on one hand, these ribs <NUM> can guide the refrigeration oil discharged from the oil outlet <NUM> to the oil storage tank <NUM>, thereby further reducing scouring of the oil output from the oil outlet <NUM> to the refrigeration oil in the oil storage tank <NUM>, and on the other hand, these ribs <NUM> can also further absorb heat of the refrigeration oil to further reduce a temperature of the refrigeration oil entering the oil storage tank <NUM>, thereby increasing a precipitation amount of the refrigerant.

Further, in this embodiment, as shown in <FIG> and <NUM>, one end of each rib <NUM> facing away from the oil outlet <NUM> extends to the bottom of the oil storage tank <NUM>. That is, when the refrigeration oil is stored in the oil storage tank <NUM>, one end of the rib <NUM> facing away from the oil outlet <NUM> extends below a level of the refrigeration oil, so that the refrigeration oil ejected from the oil outlet <NUM> can be directly guided to be mixed with the refrigeration oil in the oil storage tank <NUM>, thereby minimizing the scouring of the incoming refrigeration oil to the level of the refrigeration oil in the oil storage tank <NUM>.

Further, in this embodiment, the plurality of ribs <NUM> can be, but not limited to, integrally formed on the wall of the oil storage tank <NUM>. Thus, the processing is simple, and the forming and manufacturing are convenient.

In another embodiment of the present disclosure, as shown in <FIG> and <NUM>, the oil outlet <NUM> is arranged facing away from the bottom of the oil storage tank <NUM>. That is, when the oil storage tank <NUM> stores the refrigeration oil, the oil outlet <NUM> is arranged facing away from the level of the refrigeration oil. In this way, the arrangement of the oil outlet channel <NUM> can change an outflow direction of the refrigeration oil, and the refrigeration oil discharged from the oil outlet <NUM> does not directly face towards the level of the refrigeration oil, so that the refrigeration oil will not directly scour the level of the refrigeration oil, thereby further reducing the impact of the refrigeration oil discharged from the oil outlet <NUM> on the refrigeration oil in the oil storage tank <NUM>, which can provide a good guarantee for maintaining the stability of the refrigeration oil in the oil storage tank <NUM>.

Further, in this embodiment, the oil outlet <NUM> is located below the vent hole <NUM> in the direction of gravity to prevent the refrigeration oil discharged from the oil outlet <NUM> from entering the vent hole <NUM> and being discharged through the vent hole <NUM> together with the refrigerant when flowing along the wall of the oil storage tank <NUM>. In this embodiment, a valve structure for blocking the outflow of the refrigeration oil may also be disposed in the vent hole <NUM> to prevent the refrigeration oil of too high outflow velocity from being discharged through the vent hole <NUM>.

In some other embodiments, the vent hole <NUM> may also be arranged below the oil outlet <NUM>. In this case, a valve for blocking the outflow of the refrigeration oil needs to be disposed in the vent hole <NUM> to prevent the refrigeration oil from be discharged through the vent hole <NUM>.

In another embodiment of the present disclosure, the oil outlet <NUM> may also not be arranged facing away from the bottom of the oil storage tank <NUM>. That is, the oil outlet <NUM> may be arranged towards the bottom of the oil storage tank <NUM>. In this case, a buffer portion (not shown) may be provided between the oil storage region of the oil storage tank <NUM> and the oil outlet <NUM>, i.e., between the level of the refrigeration oil and the oil outlet <NUM>, and it is ensured that a gap is formed between the buffer portion and the wall of the oil storage tank <NUM> for the refrigeration oil to flow therethrough. In this way, the refrigeration oil discharged from the oil outlet <NUM> falls into the oil storage tank <NUM> after hitting the buffer portion. Thus, with the arrangement of the buffer portion, it is possible to further buffer the impact of the refrigeration oil. Even if the oil outlet <NUM> is arranged towards the level of the refrigeration oil, the impact of the refrigeration oil discharged from the oil outlet <NUM> on the refrigeration oil in the oil storage tank <NUM> is relatively less.

Further, in this embodiment, the buffering portion is a buffering baffle protruding from the wall of the oil storage tank <NUM>. A side wall of the buffer baffle and a side wall of the oil storage tank <NUM> are spaced apart from each other to form a gap therebetween for the flowing of the refrigeration oil therethrough. In some embodiments, the buffer portion is an orifice plate protruding from the wall of the oil storage tank <NUM>, and the orifice plate has a plurality of through holes defined thereon. The refrigeration oil flows out through the through holes on the orifice plate.

In another embodiment of the present disclosure, as shown in <FIG>, the above-mentioned oil outlet channel <NUM> may be an oil outlet pipe including an introduction section <NUM> and a discharging section <NUM> connected to the introduction section <NUM>. The oil inlet <NUM> is formed by an end of the introduction section <NUM> facing away from the discharging section <NUM>, and the oil outlet <NUM> is formed by an end of the discharging section <NUM> facing away from the introduction section <NUM>. In this way, the oil outlet channel <NUM> can employ a pipeline-type channel, and a suitable pipeline is selected to be disposed in the housing <NUM> of the scroll compressor to form the above-mentioned oil outlet channel <NUM>. The oil outlet channel <NUM> thus has a relatively simple structure and can be readily manufactured and formed.

Further, in this embodiment, the discharging section <NUM> is connected to the introduction section <NUM> at an angle, and the curved section of the oil outlet channel <NUM> is formed at a position of the connection angle. In this embodiment, the connection angle between the introduction section <NUM> and the discharging section <NUM> may be an acute angle, a right angle or an obtuse angle.

Further, in this embodiment, the discharging section <NUM> penetrates the wall of the oil storage tank <NUM>, so that the oil outlet <NUM> extends into the oil storage tank <NUM>. That is, the discharging section <NUM> is inserted into the wall of the oil storage tank <NUM> to ensure that the oil outlet <NUM> extends into the oil storage tank <NUM>. In some embodiments, the introduction section <NUM> penetrates the wall of the oil storage tank <NUM>. That is, the introduction section <NUM> is inserted into the wall of the oil storage tank <NUM>, and a part of the introduction section <NUM> connected to the discharging section <NUM> extends into the oil storage tank <NUM>. The discharging section <NUM> is entirely located in the oil storage tank <NUM>. In this way, a non-oil storage space of the oil storage tank <NUM> located at an upper part thereof can be reasonably utilized, and an arrangement space of the oil outlet channel <NUM> can be reduced as much as possible.

As shown in FIGS. <NUM> to <NUM>, in another embodiment of the present disclosure, as an alternative to the above-mentioned embodiment, a side wall, facing towards the oil separation structure <NUM>, of the stationary scroll disk <NUM> of the scroll compressor in this embodiment has a first communication slot <NUM> and a second communication slot <NUM> that are defined thereon. As shown in FIG. <NUM>, the first communication slot <NUM> is arranged close to the oil inlet <NUM>, and the second communication slot <NUM> is arranged close to the refrigerant outlet <NUM>. The oil discharging hole <NUM> is connected to the oil inlet <NUM> through the first communication slot <NUM>, and the vent hole <NUM> is connected to the refrigerant outlet <NUM> through the second communication slot <NUM>. By forming the first communication slot <NUM> and the second communication slot <NUM> on the stationary scroll disk <NUM>, the refrigeration oil discharged from the oil discharging hole <NUM> flows into the oil inlet <NUM> of the oil outlet channel <NUM> through the first communication slot <NUM>, and the refrigerant discharged from the vent hole <NUM> of the oil storage tank <NUM> is discharged through the second communication slot <NUM>. In this way, there is no need to provide additional pipelines or pipes in the housing <NUM> of the scroll compressor to guide the flow of the refrigeration oil or the refrigerant. Thus, the existing structure of the scroll compressor can be reasonably utilized to simplify the overall structure of the scroll compressor of the present embodiment.

In this embodiment, as shown in FIG. <NUM> and FIG. <NUM>, the scroll compressor also includes a seal <NUM> attached to an end surface (that is, a side wall of the stationary scroll disk <NUM> facing away from the orbiting scroll disk <NUM>) of the stationary scroll disk <NUM> facing towards the oil separation structure <NUM>. Further, the seal <NUM> is substantially the same as the end surface of the stationary scroll disk <NUM> in shape and as the side wall of the stationary scroll disk <NUM> in size, which ensures that an overall appearance of the scroll compressor is more beautiful. Further, the end surface of the stationary scroll disk <NUM> facing towards the oil separation structure <NUM> has a recess <NUM> defined thereon, and the recess <NUM> has openings defined at two ends thereof. The oil outlet channel <NUM> is defined by the recess <NUM> and the seal <NUM>, and one opening at one end of the recess is formed as the oil outlet <NUM> of the oil outlet channel <NUM>, and the other opening at the other end of the openings of the recess is formed as the oil inlet <NUM> of the oil outlet channel <NUM>. In this way, by attaching the seal <NUM> with the end surface of the stationary scroll disk <NUM>, the seal <NUM> is connected to the end surface of the stationary scroll disk <NUM> in a sealing manner, and an end surface of a wall of the recess <NUM> is abutted against the seal <NUM>, so that the oil outlet channel <NUM> is formed in the housing <NUM>. Therefore, the oil outlet channel <NUM> can be simply arranged.

In some embodiments, the above-mentioned recess <NUM> may also be formed on the seal <NUM>. That is, the end surface of the seal <NUM> facing away from the oil separation structure <NUM> has a recess <NUM> defined, and the recess has two openings defined at two ends thereof. The oil outlet channel <NUM> is defined by the recess <NUM> and the end surface of the stationary scroll disk <NUM>, and the openings defined at two ends of the recess <NUM> are formed as the oil outlet <NUM> and the oil inlet <NUM> of the oil outlet channel <NUM>, respectively. In this way, by attaching the seal <NUM> to the end surface of the stationary scroll disk <NUM>, the seal <NUM> is connected to the end surface of the stationary scroll disk <NUM> in a sealing manner, and the end surface of the wall of the recess 17is abutted against the seal <NUM>, so that the oil outlet channel <NUM> can be also formed in the housing <NUM>.

In this embodiment, the seal <NUM> may be, but is not limited to, a sealing gasket or the like that is sealingly attached to the side wall surface of the stationary scroll disk <NUM>.

It should be noted that, in the above two embodiments, the oil return hole <NUM> and the vent hole <NUM> both penetrate the seal <NUM> to prevent the arrangement of the seal <NUM> from affecting the normal discharge of the refrigeration oil and the refrigerant.

In another embodiment of the present disclosure, as another alternative to the above-mentioned embodiments, as shown in FIG. <NUM>, the housing <NUM> of the scroll compressor includes an oil separation shell <NUM> having a connection surface <NUM>. The connection surface matches with and is connected to the end surface of the stationary scroll disk <NUM> facing towards the oil separation structure <NUM>. Here, the matching connection between the connection surface <NUM> and the end surface of the stationary scroll disk <NUM> means that a shape of the connection surface <NUM> is the same as or similar to that of the end surface of the stationary scroll disk <NUM>, and a size of the connection surface <NUM> is substantially the same as that of the end surface of the stationary scroll disk <NUM>. Further, the connection surface <NUM> has a recess defined thereon, and the recess has openings defined at two ends thereof. In some embodiments, the recess <NUM> is recessed away from the stationary scroll disk <NUM> on the connection surface <NUM>. The end surface of the stationary scroll disk <NUM> is attached to the connection surface <NUM>, and the above-mentioned oil outlet channel <NUM> is defined by the end surface of the stationary scroll disk <NUM> and the recess <NUM>. One opening at one end of the recess <NUM> is formed as the oil outlet <NUM> of the above oil outlet channel <NUM>, and the other opening at the other end of the recess <NUM> is formed as the oil inlet <NUM> of the above oil outlet channel <NUM>. By forming the recess <NUM> on the connection surface <NUM> of the oil separation shell <NUM>, when the connection surface <NUM> of the oil separation shell <NUM> is attached to the end surface of the stationary scroll disk <NUM>, an end surface of a wall of the recess <NUM> is abutted against the end surface of the stationary scroll disk <NUM> to form the above oil outlet channel <NUM>. Thus, the oil outlet channel <NUM> can also be relatively simply arranged.

In the present embodiment, as shown in FIG. <NUM>, the oil separation shell <NUM> also has an accommodation groove <NUM> provided therein, and the accommodation groove <NUM> is configured to accommodate the recess <NUM>. The oil storage tank <NUM> as described above is defined by an inner wall surface of the accommodation groove <NUM> and an outer wall surface the recess <NUM>. The oil return hole <NUM> and the vent hole <NUM> are both defined on the oil separation shell <NUM>. In this way, by providing a separate oil separation shell <NUM> for arranging the oil outlet channel <NUM> as described above, the oil separation shell <NUM> is independently formed and arranged, which is more convenient for disassembly and assembly, and more convenient for maintenance and repairing of the oil outlet channel <NUM>, the oil storage tank <NUM>, the vent hole <NUM>, and the like.

In this embodiment, as shown in FIG. <NUM>, the oil separation shell <NUM> also has a connection channel <NUM> defined therein, and the connection channel <NUM> is configured to allow the precipitated refrigerant to flow therethrough. The connection channel <NUM> has an inlet connected to the oil outlet <NUM>, and an outlet connected to the vent hole <NUM>. The refrigerant discharged from the oil outlet <NUM> of the oil outlet channel <NUM> flows through the connection channel <NUM> and then is discharged through the vent hole <NUM>. The arrangement of the connection channel <NUM>, on the one hand, can increase a distance between the vent hole <NUM> and the oil outlet <NUM> of the oil outlet channel <NUM>, so as to prevent the refrigeration oil discharged from the oil outlet <NUM> from breaking into the vent hole <NUM>. On the other hand, a wall of the connection channel <NUM> is in communication with the wall of the oil storage tank <NUM>, and thus the precipitated refrigerant is in contact with the wall of the connection channel <NUM>. Thus, the connection channel <NUM> can further cool the precipitated refrigerant, so that a gaseous refrigeration oil mixed in the refrigerant is condensed on a wall surface of the channel and backflows into the oil storage tank <NUM>, thereby better preventing the refrigeration oil from being discharged together with the refrigerant.

In this embodiment, as shown in FIG. <NUM>, the wall surface of the connection channel <NUM> has an oil blocking portion <NUM> provided thereon, and the oil blocking portion <NUM> is configured to block the refrigeration oil flowing out of the oil outlet <NUM> from flowing into the vent hole <NUM> through the connection channel <NUM>. In this embodiment, the oil blocking portion <NUM> is disposed close to the oil outlet <NUM>, and a gap is formed between the oil blocking portion <NUM> and the end surface of the oil outlet <NUM>, so as to ensure that the refrigeration oil flowing out of the oil outlet <NUM> can be discharged smoothly. In this way, the oil blocking portion <NUM> can effectively block the refrigeration oil from entering the connection channel <NUM>, and both the refrigeration oil and the precipitated refrigerant can be discharged normally through the gap between the oil blocking portion <NUM> and the end surface of the oil outlet <NUM>. In this way, by providing the oil blocking portion <NUM>, it is possible to effectively block the refrigeration oil from entering the vent hole <NUM> without blocking the normal discharge of the refrigeration oil and refrigerant.

Further, in this embodiment, an oil blocking surface <NUM> is formed on a side of the oil blocking portion <NUM> facing towards the oil outlet <NUM>, and the oil blocking surface <NUM> is spaced apart from the end surface of the oil outlet <NUM>. That is, it is ensured that a gap is formed between the oil blocking portion <NUM> and the end surface of the oil outlet <NUM>. In some embodiments, the oil outlet <NUM> may be partially or completely blocked by the oil blocking surface <NUM> to ensure that the refrigeration oil discharged from the oil outlet <NUM> can backflow into the oil storage tank <NUM> after hitting the oil blocking surface <NUM>.

Further, in this embodiment, the oil blocking portion <NUM> is a rib-like structure integrally formed on the wall of the connection channel <NUM>.

In this embodiment, as shown in FIG. <NUM>, the oil separation structure <NUM> as described above includes an oil separation chamber <NUM> arranged in the oil separation shell <NUM>, and the oil discharging hole <NUM> and the refrigerant outlet <NUM> are both arranged on a wall of the oil separation chamber <NUM>. In this way, the oil discharging hole <NUM> is in communication with the first communication slot <NUM>, and the refrigeration oil discharged from the oil discharging hole <NUM> can enter the oil inlet <NUM> of the oil outlet channel <NUM> through the first communication slot <NUM>.

Further, the wall of the oil separation chamber <NUM> also has an oil separation inlet <NUM> defined thereon and connected to the mixed fluid outlet <NUM> defined on the stationary scroll disk <NUM>, for allowing a mixed fluid of the refrigerant and the refrigeration oil discharged from the compression chamber <NUM> of the scroll compressor to enter the oil separation chamber <NUM> to be processed through an oil separation process. In this embodiment, the flow path of the mixed fluid is shown by the dotted-line arrow in FIG. In this way, the mixed fluid discharged from the mixed fluid outlet <NUM> of the stationary scroll disk <NUM> directly enters the oil separation chamber <NUM>. The resulted separated refrigeration oil enters the oil inlet <NUM> of the oil outlet channel <NUM> through the oil discharging hole <NUM>, and the resulted separated refrigerant is discharged through the refrigerant outlet <NUM>.

In another embodiment of the present disclosure, as shown in <FIG>, <NUM> and <NUM>, the oil separation structure <NUM> as described above also includes an oil separation tube <NUM> disposed in the oil separation chamber <NUM>, and the oil separation tube <NUM> has an intake end <NUM> and an outtake end <NUM>. The intake end <NUM> of the oil separation tube <NUM> is arranged towards a side where the oil discharging hole <NUM> is located, and the outtake end <NUM> of the oil separation tube <NUM> is in communication with the refrigerant outlet <NUM>. The mixed fluid flows spirally after entering the oil separation chamber <NUM> from the oil separation inlet <NUM> and collides with the wall of the oil separation chamber <NUM> and the oil separation tube <NUM>, thereby achieving the separation of the refrigerant and the refrigeration oil.

Further, in this embodiment, a flow area S1 of the refrigerant outlet <NUM> as described above, a flow area S2 of the intake end <NUM> of the oil separation tube <NUM>, and a flow area S3 of the oil discharging hole <NUM> satisfy a ratio relationship: <NUM>≤S2/S1≤<NUM>, <NUM>≤S3/S1≤<NUM>. By setting the flow area S1 of the refrigerant outlet <NUM>, the flow area S2 of the intake end <NUM> of the oil separation tube <NUM>, and the flow area S3 of the oil discharging hole <NUM> to satisfy the ratio relationship of <NUM>≤S2/S1≤<NUM> and <NUM>≤S3/S1≤<NUM>, the ratio of the flow area S2 of the intake end <NUM> of the oil separation tube <NUM> to the flow area S1 of the refrigerant outlet <NUM> is defined in a range of <NUM>~<NUM>, and the ratio of the flow area S3 of the oil discharging hole <NUM> to the flow area S1 of the refrigerant outlet <NUM> is defined in a range of <NUM> to <NUM>. In this way, the flow area of the refrigerant outlet <NUM> is greater than that of the intake end <NUM> of the oil separation tube <NUM>, and the flow area of the refrigerant outlet <NUM> is greater than that of the oil discharging hole <NUM>, so that the separated refrigerant can be discharged through the refrigerant outlet <NUM> at a higher velocity, so as to reduce a pressure in the oil separation chamber <NUM> in time and a pressure on the refrigeration oil discharged through the oil discharging hole <NUM>, thereby reducing the flow rate of the refrigeration oil discharged from the oil discharging hole <NUM> to better ensure that the refrigeration oil in the oil storage tank <NUM> is always submerged in the oil return hole <NUM>.

In some embodiments, the ratio between the flow area S2 of the intake end <NUM> of the oil separation tube <NUM> and the flow area S1 of the refrigerant outlet <NUM> as described above, i.e., S2/S1, may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or <NUM>, etc. The ratio between the flow area S3 of the oil discharging hole <NUM> and the flow area S1 of the refrigerant outlet <NUM> as described above, i.e., S3/S1, may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or <NUM> etc..

Further, in this embodiment, as shown in <FIG>, FIG. <NUM> and FIG. <NUM>, the flow area S2 of the intake end <NUM> of the oil separation tube <NUM> and the flow area S3 of the oil discharging hole <NUM> satisfy the ratio relationship of <NUM>≦S3/S2≤<NUM>. That is, the ratio of the flow area S3 of the oil discharging hole <NUM> to the flow area S2 of the intake end <NUM> of the oil separation tube <NUM> is defined in a range of <NUM> to <NUM>. In some embodiments, as shown in FIG. <NUM>, a relationship between S3/S2 and a leakage amount q<NUM> (i.e., an amount of the refrigerant leaked into the oil return channel <NUM> of the scroll compressor through the oil return hole <NUM>) is shown. As can be seen from FIG. <NUM>, the leakage amount gradually increases as S3/S2 increases. Thus, when considering manufacturing errors of the parts, the ratio of S3 to S2 is selected within the range of <NUM>~<NUM>, and thus the leakage amount is relatively small, which will not adversely affect the return volume of the refrigeration oil. That is, within this range, the leakage amount of the refrigerant leaked through the oil return hole <NUM> of the oil storage tank <NUM> has little effect on the proportion of the refrigeration oil in the return oil.

In some embodiments, the ratio between the flow area S3 of the oil discharging hole <NUM> and the flow area S2 of the intake end <NUM> of the oil separation tube <NUM>, i.e., S3/S2, may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or <NUM>, etc..

In another embodiment of the present disclosure, as shown in <FIG>, FIG. <NUM> and FIG. <NUM>, a flow area S4 of the oil outlet <NUM> of the oil outlet channel <NUM> and the flow area S3 of the oil discharging hole <NUM> satisfy a ratio relationship of <NUM>≦S4/S3≤<NUM> That is, the ratio of the flow area S4 of the oil outlet <NUM> of the oil outlet channel <NUM> to the flow area S3 of the oil discharging hole <NUM> is defined within the range of <NUM> to <NUM>. In this way, the overflow area S4 of the oil outlet <NUM> of the oil outlet channel <NUM> is greater than the overflow area S3 of the oil discharging hole <NUM>. Therefore, when the refrigeration oil flows out of the oil outlet <NUM>, the flow area sharply increases, and the flow velocity is further slowed down, which further reduces the impact of the refrigeration oil discharged from the oil outlet <NUM> on the level of the refrigeration oil in the oil storage tank <NUM>.

In some embodiments, as shown in FIG. <NUM>, a relationship between S4/S3 and the outlet flow velocity of the refrigeration oil when flowing out of the oil outlet <NUM> is shown. As can be seen from FIG. <NUM>, as S4/S3 increases, the outlet flow velocity gradually decreases. In this way, when considering the manufacturing errors of the parts, the ratio of S4 to S3 is selected within the range of <NUM> to <NUM>, and the flow velocity of the refrigeration oil flowing out of the oil outlet <NUM> of the oil outlet channel <NUM> is relatively small, which will not adversely affect the return volume of the refrigeration oil. That is, within this range, the leakage amount of the refrigerate leaked through the oil return hole <NUM> of the oil storage tank <NUM> has little effect on the proportion of the refrigeration oil in the return oil.

In some embodiments, the ratio between the flow area S4 of the oil outlet <NUM> of the oil outlet channel <NUM> and the flow area S3 of the oil discharging hole <NUM> as described above, i.e., S4/S3, may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or <NUM> etc..

In another embodiment of the present disclosure, as shown in <FIG>, FIG. <NUM> and FIG. <NUM>, a flow area S5 of the vent hole <NUM> and the flow area S2 of the intake end <NUM> of the oil separation tube <NUM> satisfy a ration relationship of <NUM>≤S5/S2≤<NUM>. That is, the ratio of the flow area S5 of the vent hole <NUM> to the flow area S2 of the intake end <NUM> of the oil separation tube <NUM> is defined within a range of <NUM> to <NUM>. In some embodiments, as shown in FIG. <NUM>, a relationship between S5/S2 and Pk-Pd' (a pressure difference ΔP between the oil outlet <NUM> and the oil inlet <NUM> of the oil outlet channel <NUM>) is shown. As can be seen from FIG. <NUM>, values of S5/S2 within a range of <NUM>~<NUM> all satisfy that the pressure difference ΔP is greater than zero. That is, it can be ensured that the refrigerant precipitated from the refrigeration oil is discharged through the vent hole <NUM> by means of the pressure. In addition, since the higher the pressure difference ΔP is, the faster the flow velocity of the refrigeration oil in the oil outlet channel <NUM> is. Therefore, if the pressure difference ΔP satisfies the requirement of the refrigerant discharging, it is avoided to set the ratio of S5/S2 to be too large, so as to prevent the refrigeration oil in oil outlet channel13 from accelerating the flowing by an excessive pressure, to ensure that the refrigeration oil can flow and slow down along the oil outlet channel <NUM>, thereby ensuring an oil output stability of the oil outlet channel <NUM>. In addition, selecting the ratio of S5/S2 within the above range can avoid overflowing from the oil outlet <NUM> of the oil outlet channel <NUM> through the vent hole <NUM> due to too large diameter of the vent hole <NUM>.

In some embodiments, the ratio between the flow area S5 of the vent hole <NUM> and the flow area S2 of the intake end <NUM> of the oil separation tube <NUM> (i.e., S5/S2) may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> or <NUM>, etc..

In another embodiment of the present disclosure, as shown in <FIG>, FIG. <NUM> and FIG. <NUM>, the oil separation shell <NUM> also has a rectification chamber <NUM> provided therein, and the rectification chamber <NUM> is arranged close to the oil separation chamber <NUM>. The rectification chamber <NUM> is configured to perform a first-stage depressurization and deceleration processing on the mixed fluid of the refrigerant and the refrigeration oil before the mixed fluid enters the oil separation chamber <NUM>. In this embodiment, a mixed fluid inlet <NUM> communicates the mixed fluid outlet <NUM> on the stationary scroll disk <NUM> with the rectification chamber <NUM>, so that the mixed fluid discharged from the compression chamber <NUM> is introduced into the rectification chamber <NUM>. The mixed fluid discharged from the compression chamber <NUM> enters the rectification chamber <NUM> through the mixed fluid inlet <NUM>, and then enters the oil separation chamber <NUM> through the oil separation inlet <NUM> for the oil-gas separation after discharged from the rectification chamber <NUM>. In some embodiments, when the rectification chamber <NUM> is provided, the flow paths of the mixed fluid are shown by the dotted arrows in <FIG> and <NUM>.

In this embodiment, the oil separation inlet <NUM> is disposed above the mixed fluid inlet <NUM> in the direction of gravity, so as to avoid the mixed fluid entering the rectification chamber <NUM> from the oil separation inlet <NUM> from directly entering the oil separation chamber <NUM> through the oil separation inlet <NUM> without flowing in the rectification chamber <NUM>, i.e., so as to avoid short-flow of the mixed fluid, thereby ensuring that the rectification chamber <NUM> can reliably and effectively rectify and depressurize the mixed fluid. When in use, the mixed fluid inlet <NUM> formed on the oil separation shell <NUM> is connected to the mixed fluid outlet <NUM> formed on the stationary scroll disk <NUM>, so that the mixed fluid of the refrigerant and the refrigeration oil discharged from the compression chamber <NUM> of the scroll compressor enters the rectification chamber <NUM> through the mixed fluid inlet <NUM>, and the rectification chamber <NUM> can rectify the discharged mixed fluid to reduce the flow rate of the mixed fluid and a pressure pulsation, thereby realizing the first-stage depressurization of the mixed fluid. In this way, when the mixed fluid rectified by the rectification chamber <NUM> enters the oil separation chamber <NUM> for the oil separation processing, the pressure of the mixed fluid is greatly reduced via the first-stage depressurization. When the mixed fluid collides with the wall of the oil separation chamber <NUM> and the oil separation tube <NUM>, since the pressure of the mixed fluid is greatly reduced, the pressure pulsation of the mixed fluid is weakened, and the flow rate is reduced. Therefore, the impact of the mixed fluid on the wall of the oil separation chamber <NUM> and the oil separation tube <NUM> is reduced, and an impact noise is reduced, thereby reducing an impact loss of the oil separation tube <NUM> and prolonging the service life.

Further, in this embodiment, as shown in FIG. <NUM>, the rectification chamber <NUM> is a chamber having a streamlined wall surface <NUM>. In some embodiments, the streamlined wall surface <NUM> is disposed on a side of the mixed fluid inlet <NUM>, and the mixed fluid flowing through the mixed fluid inlet <NUM> flows in the rectification chamber <NUM> by a guidance of the streamlined wall surface <NUM>. In this way, the mixed fluid flows along the streamlined wall surface <NUM>, and the fluid thus flows more smoothly, thereby further reducing the impact of the mixed fluid on an inner wall surface of the rectification chamber <NUM> and improving noise reduction effect of the rectification chamber <NUM> more effectively.

Further, in this embodiment, as shown in FIGS. <NUM> and <NUM>, when the scroll compressor is provided with the seal <NUM>, a position where the seal <NUM> faces towards the mixed fluid inlet <NUM> is hollowed, so that an avoidance position <NUM> for avoiding the mixed fluid inlet <NUM> is formed at the position where the seal <NUM> faces towards the mixed fluid inlet <NUM>. Thus, it can be ensured that the discharging of the mixed fluid will not be blocked by the seal <NUM> and that the mixed fluid can be discharged into the rectification chamber <NUM> through the mixed fluid inlet <NUM>.

In another embodiment of the present disclosure, the oil separation shell <NUM> as described above and the seal <NUM> are both made of a material with strong impact resistance, so as to ensure that the oil separation shell <NUM> and the seal <NUM> will not be deformed due to the impact of the mixed fluid, the refrigerant or the refrigeration oil, thereby prolonging the service life of the oil separation shell <NUM> and the seal <NUM>.

In another embodiment of the present disclosure, the refrigerant outlet <NUM> as described above is formed as a flaring port. That is, a flow area of the refrigerant outlet <NUM> gradually increases in the flowing direction of the refrigerant, so that at least a part of the refrigerant outlet <NUM> is formed into a flaring shape. The flow rate gradually decreases when the refrigerant flows in the refrigerant outlet <NUM>. In this way, a gas flow can be decelerated and depressurized at the refrigerant outlet <NUM>, which can provide the rectification to a certain extent, thereby providing more stable refrigerant discharging. Therefore, an impact on the housing <NUM> is reduced during discharging the refrigerant through the refrigerant outlet <NUM>.

It should be noted that, in the embodiment of the present disclosure, when the refrigerant outlet <NUM> is formed as the flaring port, the flow area S1 of the refrigerant outlet <NUM> as described above refers to a flow area of the inlet end of the refrigerant outlet <NUM>.

Other embodiments of the present disclosure also provide a refrigeration device (not shown) including the scroll compressor as described.

According to the invention, by employing the scroll compressor as described above, since the oil outlet channel <NUM> is disposed in the housing <NUM> of the scroll compressor, and the oil outlet channel <NUM> can guide the refrigeration oil to flow against the direction of gravity, it is possible to reduce the outflow velocity and the outflow pressure when the refrigeration oil is discharged into the oil storage tank <NUM> and the impact on the refrigeration oil in the oil storage tank <NUM> when the refrigeration oil is discharged, thereby ensuring that the refrigeration oil in the oil storage tank <NUM> remains stable to increase the effective oil storage volume of the oil storage tank <NUM>. In addition, the oil return hole <NUM> of the oil storage tank <NUM> is always submerged by the refrigeration oil, which preventing the refrigerant from leaking directly into the oil return channel <NUM> of the scroll compressor through the oil return hole <NUM>. Therefore, the scroll compressor has sufficient oil return and improved compression efficiency, thereby optimizing refrigeration capacity of the refrigeration device.

Other embodiments of the present disclosure also provide a vehicle including the refrigeration device as described above.

In the vehicle according to the embodiments of the present disclosure, by employing the refrigeration device as described above, during refrigeration of the vehicle, since the refrigeration capacity and the refrigeration efficiency of the refrigeration device can always be maintained at a higher level, the cooling time inside the vehicle can be effectively shortened, and the cooling speed of the vehicle is boosted, thereby improving vehicle use experience.

Claim 1:
A scroll compressor, comprising:
a housing (<NUM>),
an oil separation structure (<NUM>) provided in the housing (<NUM>),
an oil storage tank (<NUM>) provided in the housing (<NUM>), and
an oil outlet channel (<NUM>) provided in the housing (<NUM>),
wherein:
the oil outlet channel (<NUM>) has an oil inlet (<NUM>) and an oil outlet (<NUM>) located above the oil inlet (<NUM>),
the oil inlet (<NUM>) is in communication with an oil discharging hole (<NUM>) of the oil separation structure (<NUM>), and
the oil outlet (<NUM>) being in communication with the oil storage tank (<NUM>); wherein:
a refrigerant outlet (<NUM>) is defined on the housing (<NUM>), wherein the refrigerant separated by the oil separation structure (<NUM>) is discharged through the refrigerant outlet (<NUM>),
and
characterized in that
a vent hole (<NUM>) is defined on a wall of the oil storage tank (<NUM>) for discharging precipitated refrigerant, and the vent hole (<NUM>) is in communication with the refrigerant outlet (<NUM>); and
wherein the vent hole (<NUM>) penetrates a wall between the oil separation structure (<NUM>) and the oil storage tank (<NUM>).