Patent Description:
In the prior art, it is known that a compressor utilizes an intake pressure boost effect. Since the compressor periodically draws gas from a gas-liquid separator, refrigerant in the gas-liquid separator forms periodic pulsation. When a pulsation frequency of the refrigerant reaches an intake resonance, an amplitude of the pulsation of the refrigerant in the gas-liquid separator reaches the maximum. The intake frequency of this type of compressor is equivalent to the intake resonance frequency (the intake frequency of the compressor is generally not greater than the intake resonance frequency), a pressure wave generated by the resonance of the refrigerant produces the intake pressure boost effect on the intake of the compressor, which in turn increases the amount of refrigerant sucked into the compressor, and enhances the compression performance of the compressor. Document <CIT> discloses a compressor in which an accumulator is fixed to the casing of the compressor body.

<CIT> discloses a gas-liquid separator according to the preamble of claim <NUM>.

A Chinese patent application with publication No. <CIT> describes a calculation expression of a resonant peak rotational speed (intake resonant frequency) of a compressor that can achieve the intake pressure boost effect. That is, a first-order resonance frequency f of the refrigerant can be calculated by the expression f=C/{<NUM>[L+(V/A)]}. In the expression, C denotes a speed of sound transmitting in the refrigerant (m/s), L denotes a length of an outlet pipe through which the refrigerant flows (m), V denotes a displacement of the compressor (m<NUM>), and A denotes a cross-sectional area of the outlet pipe (m<NUM>).

However, the conventional compressors are developing toward higher and higher compression frequencies. That is, the intake frequency of the compressor is getting higher and higher, which causes the intake frequency of the compressor to exceed the intake resonance frequency, resulting in that the compressor cannot use the resonance pulsation of the refrigerant to achieve the intake pressure boost effect during the gas suction. Therefore, the amount of the intake in the compressor is reduced, resulting in the deterioration of the performance of the compressor.

It can be seen from the expression of the first-order resonance frequency f of the refrigerant that the first-order resonance frequency f of the refrigerant may be increased by reducing the length L of the outlet pipe and the displacement V of the compressor, or increasing the cross-sectional area A of the outlet pipe. Changes in the displacement V of the compressor and the cross-sectional area A of the outlet pipe have a relative small influence on the first-order resonance frequency f of the refrigerant. The length L of the outlet pipe has a relative large influence on the first-order resonance frequency f of the refrigerant.

However, since the outlet pipe generally passes through a bottom of the gas-liquid separator, lessening the length of the outlet pipe means that the length of the gas-liquid separator should be also shortened, and thus the capacity of the gas-liquid separator will be reduced, which means the function of the gas-liquid separator will be weaken, causing the possibility of the compressor suffering from liquid hammer to be increased, affecting the performance of the compressor.

In view of this, a Chinese patent with publication No. <CIT> describes a technical solution in which an outlet pipe passes through a side wall of a housing of a gas-liquid separator to reach the outside of the housing, so that only the length of the outlet pipe is shortened without shortening the length of the gas-liquid separator, thus not affecting the capacity of the gas-liquid separator. However, it is easy to cause a problem of oil accumulation in an area of the gas-liquid separator below the outlet pipe and reduce the lubricating oil in the compressor, thereby affecting the reliability of the compressor during long-term operation. In addition, since the outlet pipe passes through the side wall of the housing of the gas-liquid separator to reach the outside of the housing, most of the outlet pipe hangs and extends into an inner cavity of the gas-liquid separator, thus causing the outlet pipe to easily produce a relative great vibration when the compressor is operating, causing an increasing in the noise easily, and even causing damage and fracture of the outlet pipe.

An objective of the present application is to provide a gas-liquid separator that can improve high frequency compression performance and facilitate the reflow of lubricating oil.

To achieve the objective, the present invention provides a gas-liquid according to independent claim <NUM>. Further preferred embodiments of the invention are defined in the dependent claims.

It can be seen from the above that through the arrangement and structural design of the gas-liquid separator in the present application, the outlet pipe passes through the side wall of the housing of the gas-liquid separator to reach the outside of the housing. On the one hand, the present application is beneficial to a lessening of the length of the outlet pipe and an increase in the first-order resonance frequency of the refrigerant, thus preventing the intake frequency of the compressor during high-frequency operation from significantly exceeding the first-order resonance frequency of the refrigerant, so that the first-order resonance frequency of the refrigerant in the gas-liquid separator can be equivalent to the intake frequency of the high-frequency compressor, which is convenient for the compressor to produce the intake pressure boost effect during high-frequency operation, thereby enhancing the intake efficiency of the compressor and improving the performance of the compressor. On the other hand, the arrangement of the liquid suction pipe makes it easy for the lubricating oil at the bottom of the gas-liquid separator to be sucked into the compressor, thereby preventing a large amount of lubricating oil from being accumulated at the bottom of the inner cavity of the gas-liquid separator, enabling the compressor to be lubricated continuously, and ensuring a long-term reliable operation of the compressor.

According to the invention, the gas-liquid separator further includes a fixing member. The fixing member is disposed in the inner cavity of the gas-liquid separator. The fixing member is fixedly connected to the housing and the first outlet pipe.

It can be seen from the above that the present application can reduce the vibration intensity of the outlet pipe.

According to the invention, the first outlet pipe passes through a first position of the side wall of the housing to reach the outside of the housing. The first outlet pipe is connected to the fixing member at a second position. The first outlet pipe has an inner extension section extending in a vertical direction and an outer connection section extending in a horizontal direction. The inner extension section and the outer connection section are connected by a bent section.

In the vertical direction, the first position is distanced from the second position by a first distance. An end of the first outlet pipe extending to a top portion of the inner cavity of the gas-liquid separator is distanced from the first position by a second distance. A ratio of the first distance to the second distance is between <NUM> to <NUM>.

It can be seen from the above that the present application can balance the vibration intensity throughout the outlet pipe, prevent the local severe vibration of the outlet pipe, and prevent local damage to the outlet pipe due to vibration.

According to the invention, the first outlet pipe includes an inner extension section and an outer connection section. The inner extension section is disposed in the inner cavity of the gas-liquid separator. The outer connection section passes through the side wall of the housing to reach the outside of the housing. The liquid suction pipe is connected to the outer connection section.

According to the invention, the inner extension section extends in a vertical direction.

According to the invention, the outer connection section extends in a horizontal direction.

According to another preferred solution, a second outlet pipe is further provided. The second outlet pipe passes through the side wall of the housing to reach the outside of the housing.

According to a further solution, the second outlet pipe passes through the side wall of the housing to reach the outside of the housing.

According to yet another preferred solution, the first outlet pipe passes through a first position of the side wall of the housing to reach the outside of the housing. A distance from the first position to a bottom of the housing is not greater than a distance from the first position to a top of the housing.

It can be seen from the above that the present application can weaken the vibration of the lower end of the gas-liquid separator and reduce the vibration and noise of the gas-liquid separator.

It can be seen from the above that through the arrangement and structural design of the compressor assembly in this application, the first outlet pipe passes through the side wall of the housing of the gas-liquid separator to reach the outside of the housing. On the one hand, the present application is beneficial to a lessening of the length of the outlet pipe and an increase in the first-order resonance frequency of the refrigerant, thus preventing the intake frequency of the compressor during high-frequency operation from significantly exceeding the first-order resonance frequency of the refrigerant, so that the compressor can utilize the intake pressure boost effect effectively during high-frequency operation, thereby enhancing the intake efficiency of the compressor and improving the performance of the compressor. On the other hand, the arrangement of the liquid suction pipe makes it easy for the lubricating oil at the bottom of the gas-liquid separator to be sucked into the compressor, thereby preventing a large amount of lubricating oil from being accumulated at the bottom of the inner cavity of the gas-liquid separator, enabling the compressor to be lubricated continuously, and ensuring that the long-term reliable operation of the compressor.

Yet another objective of the present application is to provide a compressor assembly in which the compressor has good high frequency compression performance and facilitates reflow of lubricating oil.

To achieve the yet other objective, the present application provides a compressor assembly, which includes a compressor and the gas-liquid separator described above. An end of the first outlet pipe passing through the housing to reach the outside is connected to the compressor.

It can be seen from the above that the compressor assembly of the present application adopts the aforementioned gas-liquid separator, so that the intake efficiency of the compressor during high-frequency operation is improved, which makes it easy to improve the high-frequency operation performance of the compressor. In addition, the long-term reliable operation of the compressor can be ensured.

Yet another objective of the present application is to provide an air conditioner in which the compressor has good high frequency compression performance and facilitates reflow of lubricating oil.

To achieve the yet other objective, the air conditioner according to the present application includes the compressor assembly described above.

It can be seen from the above that since the compressor assembly of the present application adopts the aforementioned compressor, the intake efficiency of the compressor during high-frequency operation is improved, which improves the high frequency operation performance of the compressor and the high frequency performance of the air conditioner. In addition, the present application can ensure long-term reliable operation of the compressor and facilitates the long-term reliable operation of the air conditioner.

The application will be further illustrated below by combining with the drawings and embodiments.

First Embodiment of gas-liquid separator, compressor assembly and air conditioner :
Referring to <FIG>, an air conditioner of this embodiment is provided with a compressor assembly of this embodiment. The compressor assembly of this embodiment includes a compressor <NUM> and a gas-liquid separator <NUM> of this embodiment. The gas-liquid separator <NUM> of this embodiment includes a housing, a first outlet pipe <NUM> and a liquid suction pipe <NUM>. The housing includes a tubular body <NUM> and a bottom housing <NUM>. The bottom housing <NUM> is fixed to a bottom of the tubular body <NUM>. The first outlet pipe <NUM> has an inner extension section <NUM> extending in a vertical direction and an outer connection section <NUM> extending in a horizontal direction. The inner extension section <NUM> and the outer connection section <NUM> are connected by a bent section <NUM>. The inner extension section <NUM> and the bent section <NUM> are both disposed in an inner cavity of the gas-liquid separator <NUM>. The inner extension section <NUM> extends to a top of the inner cavity of the gas-liquid separator <NUM>. The outer connection section <NUM> passes through a side wall of the tubular body <NUM> to reach the outside of the housing. The outer connection section <NUM> is fixed to a casing of the compressor <NUM> by welding. The outer connection section <NUM> is fixed to the tubular body <NUM> by welding. One end of the liquid suction pipe <NUM> extends to a bottom of the inner cavity of the gas-liquid separator <NUM>, and the other end of the liquid suction pipe <NUM> is connected to the outer connection section <NUM>.

The outer connection section <NUM> passes through the side wall of the tubular body <NUM> to reach the outside of the housing, and the inner extension section <NUM> extends into the inner cavity of the gas-liquid separator <NUM>, therefore the inner extension section <NUM> is not fixedly connected to the tubular body <NUM>, thus resulting in that the inner extension section <NUM> is not fixedly positioned, so that the inner extension section <NUM> may break and be damaged due to vibration. Therefore, a fixing member <NUM> is fixedly attached to the tubular body <NUM>. The fixing member <NUM> is disposed in the inner cavity of the gas-liquid separator <NUM>. The fixing member <NUM> is fixedly connected to the inner extension section of the first outlet pipe <NUM>.

The outer connection section <NUM> passes through the side wall of the tubular body <NUM> to reach the outside of the shell, which, on the one hand, is beneficial to a lessening of the length of the first outlet pipe <NUM> and an increase in the first-order resonance frequency of refrigerant in the inner cavity of the gas-liquid separator <NUM>. Therefore, the intake frequency of the compressor during high-frequency operation is prevented from significantly exceeding the first-order resonance frequency of the refrigerant, so that the compressor can effectively use the intake pressure boost effect during high-frequency operation, thereby enhancing intake efficiency of the compressor and improving the performance of the compressor. On the other hand, the arrangement of the liquid suction pipe <NUM> makes it easy for the lubricating oil at the bottom of the inner cavity of the gas-liquid separator <NUM> to be sucked into the compressor, thereby preventing a large amount of lubricating oil from being accumulated at the bottom of the inner cavity of the gas-liquid separator <NUM>, enabling the compressor to be lubricated continuously, and ensuring a long-term reliable operation of the compressor.

Specifically, referring to <FIG>, the tubular body <NUM> is fixed to the casing of the compressor <NUM> by a connecting member <NUM>. The tubular body <NUM> and the casing of the compressor <NUM> are both welded to the connecting member <NUM>. In the vertical direction, the connecting member <NUM> is disposed above the outer connection section <NUM>. In this case, there are two fixed connections between the tubular body <NUM> and the casing of the compressor <NUM>, which is beneficial to a more stable and reliable fixed connection between the gas-liquid separator <NUM> and the compressor <NUM>.

In the vertical direction, the outer connection section <NUM> is fixedly connected to a first height position of the tubular body <NUM>, the fixing member <NUM> is fixedly connected to a second height position of the tubular body <NUM>, and the connecting member <NUM> is fixedly connected to a third height position of the tubular body <NUM>. Since the first height position and the third height position of the tubular body <NUM> are fixedly connected to the casing of the compressor <NUM>, an area between the first height position and the third height position of the tubular body <NUM> has better anti-vibration performance. Therefore, the second height position is arranged between the first height position and the third height position, so that the vibration of the inner extension section <NUM> is transmitted to a portion between the first height position and the third height position of the tubular body <NUM> through the fixing member <NUM>, which is beneficial to an enhancement of the connection rigidity of the inner extension section <NUM>, thereby reducing the vibration intensity of the inner extension section <NUM> and the vibration intensity of the gas-liquid separator <NUM>.

Optionally, the connecting member <NUM> and the tubular body <NUM> may also be fixedly connected by one or more manners such as clamping and screwing in addition to welding. Similarly, the connecting member <NUM> and the casing of the compressor <NUM> may also be fixedly connected by one or more manners such as clamping and screwing.

Optionally, the liquid suction pipe <NUM> may also be directly connected to a fluid inlet of the compressor in addition to the outer connection section <NUM>. The liquid suction pipe <NUM> and the first outlet pipe <NUM> operate independently.

Preferably, the inner extension section <NUM> and the outer connection section <NUM> are connected by the bent section <NUM>, which can prevent stress from being concentrated at a connecting portion between the inner extension section <NUM> and the outer connection section <NUM>, and improve the anti-vibration performance of the first outlet pipe <NUM>.

Specifically, the compressor <NUM> is a two-cylinder compressor. The gas-liquid separator <NUM> is further provided with a second outlet pipe. The second outlet pipe <NUM> also has an inner extension section <NUM> extending in the vertical direction and an outer connection section <NUM> extending in the horizontal direction. The inner extension section <NUM> and the outer connection section <NUM> are connected by a bent section <NUM>.

Preferably, the first outlet pipe <NUM> and the second outlet pipe <NUM> are both round pipes.

Referring to <FIG>, a total height of the housing of the gas-liquid separator <NUM> is H0. A distance from a pipe axis of the outer connection section <NUM> of the first outlet pipe <NUM> to a bottom of the bottom housing <NUM> is H1. A distance from the pipe axis of the outer connection section <NUM> of the first outlet pipe <NUM> to a top of the inner extension section <NUM> of the first outlet pipe <NUM> is H2. A distance from the pipe axis of the outer connection section <NUM> of the first outlet pipe <NUM> to the fixing member <NUM> is H3.

A top of the second outlet pipe <NUM> is flush with the top of the first outlet pipe <NUM>. The outer connection section <NUM> of the second outlet pipe <NUM> is disposed below the outer connection section <NUM> of the first outlet pipe <NUM>. A distance from the pipe axis of the outer connection section <NUM> of the second outlet pipe <NUM> to the pipe axis of the outer connection section <NUM> of the first outlet pipe <NUM> is H4.

Since the outer connection section <NUM> passes through the side wall of the tubular body <NUM> to reach the outside of the housing, the outer connection section <NUM> is fixed to the tubular body <NUM> at the position which the outer connection section <NUM> passes through, and the outer connection section <NUM> is no longer fixed to the bottom housing <NUM> of the gas-liquid separator <NUM>. The bottom housing <NUM> of the gas-liquid separator <NUM> is prone to larger vibrations. In order to reduce the vibration intensity of the bottom housing <NUM> of the gas-liquid separator <NUM>, in this embodiment, the maximum vibration value of the bottom housing <NUM> of the gas-liquid separator <NUM> is simulated by an Ansys simulation software under different conditions where H1/H0 is within a range from <NUM> to <NUM>. The maximum vibration value of the bottom housing <NUM> of the gas-liquid separator <NUM> corresponding to H1/H0=<NUM> is used as a reference. Specifically, when H1/H0=<NUM>, the relative value of the maximum vibration value b of the bottom housing <NUM> of the gas-liquid separator <NUM> is set to <NUM>, and the maximum vibration value a of the bottom housing <NUM> of the gas-liquid separator <NUM> corresponding to H1/H0 of another value is divided by the maximum vibration value b of the bottom housing <NUM> of the gas-liquid separator <NUM> when H1/H0=<NUM>, to obtain a/b. The value of a/b is a relative vibration value of the bottom housing <NUM> of the gas-liquid separator <NUM> corresponding to H1/H0 of the other value. A graph of the relative vibration values of the bottom housing <NUM> of the gas-liquid separator <NUM> corresponding to different conditions where H1/H0 is within the range from <NUM> to <NUM> is drawn and shown in <FIG>.

As shown in <FIG>, when H1/H0=<NUM>, the vibration of the bottom housing <NUM> of the gas-liquid separator <NUM> is the weakest. When H1/H0 is greater than <NUM>, the vibration of the bottom housing <NUM> of the gas-liquid separator <NUM> increases sharply, thus H1/H0 is limited to be not greater than <NUM>. As the value of H1/H0 decreases, a length L1 of the first outlet pipe <NUM> will increase accordingly. Therefore, more preferably, H1/H0 is limited to be between <NUM> and <NUM>. In this way, the relationship between the length L1 of the first outlet pipe <NUM> and the vibration intensity of the bottom housing <NUM> of the gas-liquid separator <NUM> can be balanced as much as possible, which is not only beneficial for the compressor to utilize the intake pressure boost effect, but also improves the performance of the compressor and reduces the vibration of the gas-liquid separator <NUM> as much as possible, thereby reducing noise generated when the compressor is operating.

The farther a position is away from the position where the first outlet pipe <NUM> is fixed, the more drastic the vibration. In order to determine the optimal position of the fixed member <NUM>, in this embodiment, the maximum vibration values of the top of the inner extension section <NUM> and the bent section <NUM> are simulated by the Ansys simulation software under different conditions where H3/H2 is within the range from <NUM> to <NUM>. When H3/H2=<NUM>, the maximum vibration value of the top of the inner extension section <NUM> is used as a reference. Specifically, when H3/H2=<NUM>, the relative value of the maximum vibration value d of the top of the inner extension section <NUM> is set to <NUM>, and the maximum vibration value of the top of the inner extension section <NUM> corresponding to H3/H2 of another value, or the bent section <NUM> is c, then a value of c/d is the relative vibration value of the top of the inner extension section <NUM> or the bent section <NUM> corresponding to H3/H2). A graph of the relative vibration values of the top of the inner extension section <NUM> or the bent section <NUM> under different conditions where H3/H2 is within the range from <NUM> to <NUM> is drawn and shown in <FIG>.

As shown in <FIG>, as the ratio of H3/H2 increases, the relative vibration value of the top of the inner extension section <NUM> continuously decreases. In an interval where H3/H2 is less than <NUM>, the relative vibration value of the top of the inner extension section <NUM> decreases at a faster rate. As the ratio of H3/H2 increases, the vibration value of the bent section <NUM> continuously increases, and the vibration of the bent section <NUM> increases faster when H3/H2 is greater than <NUM>. Therefore, H3/H2 is limited to be between <NUM> and <NUM>, which not only prevents the sharp increase in the vibration of the top of the inner extension section <NUM>, but prevents the sharp increase in the vibration of the bent section <NUM>.

In this embodiment, the parameters of the gas-liquid separator <NUM> and the compressor <NUM> are as follows: H0=<NUM>; H1=<NUM>; H2=<NUM>; H3=<NUM>; H4=<NUM>; a cross-sectional area A1 of a single pipe is equal to <NUM><NUM>; a length L1 of the first outlet pipe <NUM> is equal to <NUM>; a length L2 of the second outlet pipe <NUM> is equal to <NUM>; a displacement V1 of a single compression cylinder is equal to <NUM><NUM>; and a transmission speed C of the sound in the refrigerant is equal to <NUM>/s. According to the parameters of the first outlet pipe <NUM>, the intake resonance frequency f1 is calculated, to obtain f1=<NUM>/{<NUM>[<NUM>+<NUM>/<NUM>]}=<NUM>-<NUM>. According to the parameters of the second outlet pipe <NUM>, the intake resonance frequency f2 in the gas-liquid separator <NUM> is calculated, to obtain f2=<NUM>/{<NUM>[<NUM>+<NUM>/<NUM>]}=<NUM>-<NUM>. Therefore, the intake resonance frequency in the gas-liquid separator <NUM> should be between <NUM>-<NUM> and <NUM>-<NUM>. The intake resonance frequency in the gas-liquid separator <NUM> is approximately <NUM>-<NUM> (namely, (<NUM>+<NUM>)/<NUM>=<NUM>-<NUM>).

Referring to <FIG> and <FIG>, in a two-cylinder compressor in the prior art, a gas-liquid separator <NUM> includes a third outlet pipe <NUM> and a fourth outlet pipe <NUM>. The third outlet pipe <NUM> and the fourth outlet pipe <NUM> both pass through a bottom housing of a gas-liquid separator <NUM> to reach the outside of the housing, and then are fixedly connected to a casing of a compressor <NUM>. A total height of a housing of the gas-liquid separator <NUM> is H5. A distance from a pipe axis of an outer connection section <NUM> of the third outlet pipe <NUM> to a bottom of the bottom housing is H6. A distance from the pipe axis of the outer connection section <NUM> to a top of an inner extension section <NUM> of the third outlet pipe <NUM> is H7. A distance from the pipe axis of the outer connection section <NUM> of the third outlet pipe <NUM> to a fixing member <NUM> is H8.

A top of the fourth outlet pipe <NUM> is flush with the top of the third outlet pipe <NUM>. An outer connection section of the fourth outlet pipe <NUM> is disposed below the outer connection section <NUM> of the third outlet pipe <NUM>. A pipe axis of the outer connection section of the fourth outlet pipe <NUM> is distanced from the pipe axis of the outer connection section <NUM> of the third outlet pipe <NUM> by H9.

In the prior art, the parameters of the gas-liquid separator <NUM> and the compressor are as follows: H5=<NUM>; H6=<NUM>; H7=<NUM>; H8=<NUM>; H9=<NUM>; a cross-sectional area A2 of a single pipe is equal to <NUM><NUM>; a length L3 of the third outlet pipe <NUM> is equal to <NUM>; a length L4 of the fourth outlet pipe <NUM> is equal to <NUM>; a displacement V2 of a single compression cylinder is equal to <NUM><NUM>; and a transmission speed C of the sound in the refrigerant is equal to <NUM>/s. According to the parameters of the third outlet pipe <NUM>, the intake resonance frequency f3 is calculated, to obtain f3=<NUM>/{<NUM>[<NUM>+<NUM>/<NUM>]}=<NUM>-<NUM>. According to the parameters of the fourth outlet pipe <NUM>, the intake resonance frequency f4 in the gas-liquid separator <NUM> is calculated, to obtain f4=<NUM>/{<NUM>[<NUM>+<NUM>/<NUM>]}=<NUM>-<NUM>. Therefore, the intake resonance frequency in the gas-liquid separator <NUM> should be between <NUM>-<NUM> and <NUM>-<NUM>. The intake resonance frequency in the gas-liquid separator <NUM> approximates to <NUM>-<NUM> (namely, (<NUM>+<NUM>)/<NUM>=<NUM>-<NUM>).

In this case, if the compressor operates at an intake frequency of <NUM>, the following data can be obtained through testing:.

Through comparing the scheme in the prior art with the technical solution of this embodiment, it can be seen from the above table that the effective volume of the gas-liquid separator <NUM> of the technical solution of this embodiment is significantly larger than that of the gas-liquid separator <NUM> in the prior art, and the volumetric efficiency of the compressor is significantly improved, and the vibration and the noise of the gas-liquid separator <NUM> in the technical solution of this embodiment are significantly weaker than those of the gas-liquid separator <NUM> in the prior art.

Second Embodiment of Gas-liquid separator, compressor assembly, and air conditioner :
As shown in <FIG>, the first outlet pipe <NUM> passes through the side wall of the tubular body <NUM> to reach the outside of the housing, and the second outlet pipe <NUM> passes through the bottom housing <NUM> to reach the outside of the housing, which can also shorten the lengths of the first outlet pipe <NUM> and the second outlet pipe <NUM>, and increase the intake resonance frequency in the inner cavity of the gas-liquid separator <NUM>.

Other components of the gas-liquid separator, the compressor assembly, and the air conditioner of the second embodiment are the same as those of the gas-liquid separator, the compressor assembly, and the air conditioner of the first embodiment.

Third Embodiment of Gas-liquid separator, compressor assembly, and air conditioner:
As shown in <FIG>, in this embodiment, the gas-liquid separator <NUM> is provided with only the first outlet pipe <NUM>. The gas-liquid separator <NUM> of this embodiment is used for a single-cylinder compressor.

Claim 1:
A gas-liquid separator (<NUM>), comprising a housing with an inner cavity and a first outlet pipe (<NUM>), wherein,
the first outlet pipe (<NUM>) extends in an inner cavity of the gas-liquid separator (<NUM>), and passes through a side wall of the housing to reach an outside of the housing;
the gas-liquid separator (<NUM>) further comprises a fixing member (<NUM>);
the fixing member (<NUM>) is disposed in the inner cavity of the gas-liquid separator (<NUM>); and the fixing member (<NUM>) is fixedly connected to the housing and the first outlet pipe (<NUM>);
the first outlet pipe (<NUM>) passes through a first position of the side wall of the housing to reach the outside of the housing; the first outlet pipe (<NUM>) is connected to the fixing member (<NUM>) at a second position; the first outlet pipe (<NUM>) has an inner extension section (<NUM>) extending in a vertical direction and an outer connection section (<NUM>) extending in a horizontal direction; the inner extension section (<NUM>) and the outer connection section (<NUM>) are connected by a bent section (<NUM>);
the inner extension section (<NUM>) and the bent section (<NUM>) are disposed in the inner cavity of the gas-liquid separator (<NUM>); the outer connection section (<NUM>) passes through the side wall of the housing to reach the outside of the housing;
characterised in that:
the gas-liquid separator (<NUM>) comprises a liquid suction pipe (<NUM>), wherein one end of the liquid section pipe (<NUM>) extends to a bottom of the inner cavity of the gas-liquid separator (<NUM>), and another end of the liquid suction pipe (<NUM>) is connected to the outer connection section (<NUM>) of the first outlet pipe (<NUM>); and in that in the vertical direction, the first position is distanced from the second position by a first distance (H3); an end of the first outlet pipe (<NUM>) extending to a top portion of the inner cavity of the gas-liquid separator (<NUM>) is distanced from the first position by a second distance (H2); and a ratio (H3/H2) of the first distance to the second distance is between <NUM> to <NUM>.