Air conditioning system

Abstract

The present invention relates to the field of air conditioning, and specifically provides an air conditioning system, which is intended to solve the problem of noise at the throttling element during heating in the existing air conditioning system. To this end, the air conditioning system of the present invention includes an evaporator, a compressor, a condenser and a throttling element that are connected in sequence to form a closed loop, and a booster device is provided between the condenser and the throttling element, and the booster device is used to increase the refrigerant pressure so that the refrigerant before entering the throttling element is liquefied. The above-mentioned setting method, under the condition of a constant refrigerant temperature, can instantly increase the pressure of the refrigerant, so that the refrigerant before entering the electronic expansion valve is liquefied, that is, the degree of liquefaction of the refrigerant before entering the electronic expansion valve is improved, thereby reducing the refrigerant noise, and the increased pressure is then reduced by the electronic expansion valve, so that the pressure change can also achieve the effect that the compressor and other components will not be affected.

Description

Technical Field

[0001] The invention relates to the field of air conditioning, and specifically provides an air conditioning system. Background Art

[0002] When the air conditioner is in heating mode, when the refrigerant flowing out of the condenser affects the heat exchange effect due to insufficient heat exchange or excessive amount of refrigerant, it will cause the refrigerant to be incompletely liquefied. When the gas-liquid two-phase refrigerant passes through the throttling element, noise will be generated.

[0003] Taking the throttling element as an electronic expansion valve as an example, the existing scheme for eliminating noise at the electronic expansion valve includes increasing the superheat by controlling the reduction of the refrigerant flow rate, so as to achieve complete liquefaction of the refrigerant. However, when the room temperature is high, since the opening of the electronic expansion valve itself is small at this time, and the flow rate is also small, in this case, it is impossible to change the refrigerant state by controlling the opening of the electronic expansion valve. Therefore, the above scheme for eliminating noise at the electronic expansion valve under heating conditions is not ideal.

[0004] Accordingly, the art needs a new air conditioning system to solve the above problems. Summary of the invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the noise problem at the throttling element during heating of the existing air-conditioning system.

[0006] In a first aspect, the present invention provides an air-conditioning system, comprising an evaporator, a compressor, a condenser and a throttling element which are connected in sequence to form a closed loop, and is characterized in that a boosting device is provided between the condenser and the throttling element, and the boosting device is used to increase the refrigerant pressure so as to liquefy the refrigerant before entering the throttling element.

[0007] In the preferred technical solution of the above-mentioned air-conditioning system, the boosting device includes a boosting cavity, a first branch pipe and a second branch pipe, the boosting cavity is provided with a first inlet, a second inlet and a liquefied refrigerant outlet, one end of the first branch pipe is connected to the first inlet, the other end of the first branch pipe is connected to the refrigerant outlet of the condenser, one end of the second branch pipe is connected to the second inlet, the other end of the second branch pipe is connected to the refrigerant outlet of the condenser, and the liquefied refrigerant outlet is connected to the inlet of the throttling element; wherein the boosting device is configured so that the refrigerant entering the boosting cavity from the first branch pipe and the refrigerant entering the boosting cavity from the second branch pipe can intersect before reaching the inner wall of the boosting cavity.

[0008] In the preferred technical solution of the above air-conditioning system, the boost chamber is a sphere.

[0009] In a preferred technical solution of the above air-conditioning system, the first inlet and the second inlet are arranged opposite to each other.

[0010] In a preferred technical solution of the above air-conditioning system, the liquefied refrigerant outlet is located in the middle of the arc between the first inlet and the second inlet.

[0011] In a preferred technical solution of the above air-conditioning system, taking the radial center line of the sphere as a baseline, the first branch pipe and the second branch pipe are arranged in axisymmetric relation to the baseline.

[0012] In the preferred technical solution of the above-mentioned air-conditioning system, the boosting device also includes a liquid separator, which includes an inlet end, a first outflow end and a second outflow end, the inlet end is connected to the refrigerant outlet of the condenser, the first outflow end is connected to the other end of the first branch pipe, and the second outflow end is connected to the other end of the second branch pipe.

[0013] In a preferred technical solution of the above air-conditioning system, center lines of the inflow end, the first outflow end, the second outflow end, the first branch pipe, and the second branch pipe are located on the same plane.

[0014] In a preferred technical solution of the above air-conditioning system, the number of the first branch pipe and the number of the second branch pipe are both one.

[0015] In the preferred technical solution of the above air-conditioning system, the throttling element is an electronic expansion valve.

[0016] It can be understood by those skilled in the art that the present invention provides an air conditioning system, which includes an evaporator, a compressor, a condenser and a throttling element connected in sequence to form a closed loop, and a booster device is provided between the condenser and the throttling element, and the booster device is used to increase the refrigerant pressure so as to liquefy the refrigerant before entering the throttling element. The applicant has found through research that when the refrigerant temperature is constant, the refrigerant pressure, that is, the static pressure, is instantaneously increased, and the state of the refrigerant changes in the direction of the liquid state. Therefore, as long as the refrigerant pressure is increased in a short time, the refrigerant state can be changed from gas-liquid two-phase to liquid state, so that the liquid refrigerant will not produce refrigerant noise such as whistling when passing through the throttling element. Based on the above research, the present invention adds a booster device between the throttling element and the condenser, so as to liquefy the refrigerant before entering the throttling element by instantaneously increasing the refrigerant pressure, that is, improving the degree of liquefaction of the refrigerant before entering the throttling element, reducing the gas content, thereby reducing the refrigerant noise, especially for multi-split air conditioners. The noise reduction effect is more obvious. The increased pressure is then reduced by the throttling element, so that the pressure change will not affect the compressor and other components.

[0017] Further, the boosting device of the present invention comprises a boosting cavity, a first branch pipe and a second branch pipe, the boosting cavity is provided with a first inlet, a second inlet and a liquefied refrigerant outlet, one end of the first branch pipe is connected to the first inlet, the other end of the first branch pipe is connected to the refrigerant outlet of the condenser, one end of the second branch pipe is connected to the second inlet, the other end of the second branch pipe is connected to the refrigerant outlet of the condenser, and the liquefied refrigerant outlet is connected to the inlet of the throttling element, wherein the boosting device is configured so that the refrigerant entering the boosting cavity from the first branch pipe and the refrigerant entering the boosting cavity from the second branch pipe can intersect before reaching the inner wall of the boosting cavity. Thus, the refrigerant flowing out of the first branch pipe and the second branch pipe can be offset in the boosting cavity, so that when the two refrigerants are combined, the momentum is offset and eliminated, the total pressure remains unchanged, and the kinetic energy is converted into static pressure energy, that is, the static pressure is instantly increased, so that the refrigerant state begins to change from a gas-liquid mixed state to a pure liquid state, thereby reducing the refrigerant noise at the electronic expansion valve.

[0018] Furthermore, the boosting cavity is a sphere, and the first inlet and the second inlet are arranged opposite to each other, so that the refrigerant entering the boosting cavity from the first inlet and the second inlet can directly collide with each other in a positive direction, further increasing the static pressure, so that the gas-liquid two-phase refrigerant is converted into a pure liquid, thereby further reducing the refrigerant noise at the electronic expansion valve and facilitating the discharge of the liquid refrigerant.

[0019] Furthermore, the liquefied refrigerant outlet is located in the middle of the arc between the first inlet and the second inlet. This arrangement can ensure that the flow rates of the first branch pipe and the second branch pipe are consistent, thereby improving the offset effect of the two refrigerants, increasing the degree of refrigerant liquefaction, and further reducing the noise at the electronic expansion valve.

[0020] Possibly, with the radial center line of the sphere as the baseline, the first branch pipe and the second branch pipe are arranged axially symmetrically compared to the baseline. On the one hand, the refrigerant flowing out of the first branch pipe and the second branch pipe can reach the boost chamber synchronously, thereby avoiding delays and ensuring that the refrigerant noise can be reduced during the entire working process under heating conditions. On the other hand, it can ensure that the amount of refrigerant flowing out of the first branch pipe and the second branch pipe is consistent and refrigerant balance is achieved, so that the refrigerant flowing out of the first branch pipe and the refrigerant flowing out of the second branch pipe can be completely offset, so that the gas-liquid two-phase refrigerant is completely converted into pure liquid refrigerant, and the refrigerant noise can be completely eliminated. Therefore, this setting method can completely eliminate refrigerant noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a possible structural schematic diagram of the air conditioning system of the present invention;

[0023] Figure 2 1 is a schematic structural diagram of a pressure boosting device of an air conditioning system of the present invention (I);

[0024] Figure 3 2 is a schematic structural diagram of the booster device of the air conditioning system of the present invention.

[0025] List of reference numerals:

[0026] 1-condenser; 2-boosting device; 21-boosting chamber; 211-first inlet; 212-second inlet; 213-liquefied refrigerant outlet; 22-first branch pipe; 23-second branch pipe; 24-liquid separator; 241-inflow end; 242-first outflow end; 243-second outflow end; 3-throttling element; 4-evaporator; 5-compressor; 6-gas-liquid separator; 7-four-way valve. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0028] It should be noted that, in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] like Figures 1 to 3 As shown, in order to solve the noise problem at the throttling element 3 during heating of the existing air-conditioning system, the present invention provides an air-conditioning system, which comprises an evaporator 4, a compressor 5, a condenser 1 and a throttling element 3 which are sequentially connected to form a closed loop, a booster device 2 is provided between the condenser 1 and the throttling element 3, and the booster device 2 is used to increase the refrigerant pressure so as to liquefy the refrigerant before entering the throttling element 3.

[0030] The air conditioning system of the present invention can be a multi-split air conditioning system or a one-to-one air conditioning system. The throttling element 3 of the present invention is preferably a throttling valve, such as an electronic expansion valve. It can also be a capillary tube, etc. The throttling element 3 of the present invention will be introduced below by taking the electronic expansion valve as an example. It can be understood that, under normal circumstances, in the heating mode, the indoor unit heat exchanger of the air conditioning system is used as a condenser 1, so that the gaseous refrigerant releases heat and is converted into a liquid state. After throttling by the throttling element 3, it enters the outdoor unit evaporator 4, and is vaporized by the outdoor unit evaporator 4 to absorb the heat of the outdoor air, and becomes a gas to start the next cycle.

[0031] The refrigerant noise of the air-conditioning system under heating conditions is mainly caused by the sudden change of the pipe diameter of the gas-liquid two-phase refrigerant when passing through the electronic expansion valve. The applicant has found through research that when the refrigerant temperature is constant, the pressure of the refrigerant, that is, the static pressure, is instantly increased, and the state of the refrigerant tends to change in the liquid direction. Therefore, as long as the pressure of the refrigerant is increased in a short time, the refrigerant state can be changed from gas-liquid two-phase to liquid, so that the liquid refrigerant will not produce refrigerant noise such as whistle when passing through the electronic expansion valve. Based on the above research, the present invention installs a booster device 2 between the electronic expansion valve and the condenser 1, so that the refrigerant before entering the electronic expansion valve is liquefied by instantaneously increasing the refrigerant pressure, that is, improving the degree of liquefaction of the refrigerant before entering the electronic expansion valve, reducing the gas content, thereby reducing the refrigerant noise, especially for multi-split air conditioners. The noise reduction effect is more obvious. And the increased pressure is then reduced by the electronic expansion valve (capillary tube can be installed), so that the pressure change can also achieve the effect that the compressor 5 and other components will not be affected.

[0032] Reference Figure 2 and Figure 3As a possible embodiment, the boosting device 2 of the present invention includes a boosting cavity 21, a first branch pipe 22 and a second branch pipe 23. The boosting cavity 21 is provided with a first inlet 211, a second inlet 212 and a liquefied refrigerant outlet 213. One end of the first branch pipe 22 is connected to the first inlet 211, and the other end of the first branch pipe 22 is connected to the refrigerant outlet of the condenser 1. One end of the second branch pipe 23 is connected to the second inlet 212, and the other end of the second branch pipe 23 is connected to the refrigerant outlet of the condenser 1. The liquefied refrigerant outlet 213 is connected to the inlet of the throttling element 3, for example, through a refrigerant pipe, wherein the boosting device 2 is configured so that the refrigerant entering the boosting cavity 21 from the first branch pipe 22 and the refrigerant entering the boosting cavity 21 from the second branch pipe 23 can intersect before reaching the inner wall of the boosting cavity 21. It is understandable that the refrigerant entering the boost cavity 21 from the first branch pipe 22 and the refrigerant entering the boost cavity 21 from the second branch pipe 23 can intersect before reaching the inner wall of the boost cavity 21, that is, the refrigerant flowing out of the first branch pipe 22 and the refrigerant flowing out of the second branch pipe 23 will eventually overlap in the refrigerant flow path in the boost cavity 21 (before reaching the inner wall of the boost cavity 21). Among them, the first branch pipe 22 and the second branch pipe 23 are preferably copper pipes. It is understandable that the connection method between the first branch pipe 22 and the first inlet 211 includes multiple methods, for example, it can be a welding connection, it can also be an integral molding connection, it can also be a sealed connection through a sealing gasket, etc. The connection method between the second branch pipe 23 and the second inlet 212 also includes multiple methods, for example, it can be a welding connection, it can also be an integral molding connection, it can also be a sealed connection through a sealing gasket, etc.

[0033] The above-mentioned arrangement enables the refrigerant to continue to flow from the refrigerant outlet of the condenser 1 to the first branch pipe 22 and the second branch pipe 23 after releasing heat through the condenser 1, and then flow into the boost chamber 21 from the first inlet 211 connected to the first branch pipe 22 and the second inlet 212 connected to the second branch pipe 23 respectively. Since the boost device 2 is arranged so that the refrigerant entering the boost chamber 21 from the first branch pipe 22 and the refrigerant entering the boost chamber 21 from the second branch pipe 23 can intersect before reaching the inner wall of the boost chamber 21, the refrigerant flowing out of the first branch pipe 22 and the second branch pipe 23 can offset each other in the boost chamber 21, so that when the two refrigerants are combined, the momentum is offset and the total pressure remains unchanged, and the kinetic energy is converted into static pressure energy, that is, the static pressure increases instantly, so that the state of the refrigerant begins to change from a gas-liquid mixed state to a pure liquid state, thereby reducing the refrigerant noise at the electronic expansion valve.

[0034] As a preferred embodiment, the boosting cavity 21 is a sphere. Since the boosting cavity 21 is a sphere, that is, due to the spherical structure, after the refrigerant enters the boosting cavity 21 from the first inlet 211 and the second inlet 212 at different positions, they can be counteracted, thereby increasing the static pressure and causing the refrigerant to transform into a liquid state. And since the boosting cavity 21 is a sphere, it is easy to discharge the liquid refrigerant.

[0035] Furthermore, the first inlet 211 and the second inlet 212 are arranged opposite to each other. That is, the first inlet 211 and the second inlet 212 are both located on the same radial center line of the boost chamber 21. Thus, the refrigerant entering the boost chamber 21 from the first inlet 211 and the second inlet 212 can directly collide with each other in a positive direction, further increasing the static pressure, so that the gas-liquid two-phase refrigerant is converted into a pure liquid state, thereby further reducing the refrigerant noise at the electronic expansion valve and improving the user experience.

[0036] As a preferred embodiment, the liquefied refrigerant outlet 213 is located in the middle of the arc between the first inlet 211 and the second inlet 212. In other words, the liquefied refrigerant outlet 213 is projected in the middle of the line connecting the first inlet 211 and the second inlet 212.

[0037] If the liquefied refrigerant outlet 213 is not located in the middle of the arc between the first inlet 211 and the second inlet 212, for example, the liquefied refrigerant outlet 213 is arranged close to the first inlet 211, in this case, since the boost chamber 21 is a sphere, the refrigerant may flow out of the first branch pipe 22 and the second branch pipe 23 unbalanced due to the centrifugal force. Therefore, the present invention locates the liquefied refrigerant outlet 213 in the middle of the arc between the first inlet 211 and the second inlet 212, which can ensure that the flow rates of the first branch pipe 22 and the second branch pipe 23 are consistent, thereby improving the offset effect of the two refrigerants, improving the degree of refrigerant liquefaction, and further reducing the noise at the electronic expansion valve.

[0038] As a possible implementation, the radial center line of the sphere is used as the baseline, and the first branch pipe 22 and the second branch pipe 23 are arranged axially symmetrically with respect to the baseline. It can be understood that the radial center line can be any radial center line of the sphere.

[0039] This arrangement can make the length of the first branch pipe 22 and the second branch pipe 23 equal and the shape the same. On the one hand, it can avoid the delay in eliminating the refrigerant noise at the electronic expansion valve caused by the different lengths of the first branch pipe 22 and the second branch pipe 23. For example, when the first branch pipe 22 is longer than the second branch pipe 23, the refrigerant flowing out of the shorter second branch pipe 23 enters the boost chamber 21 first. At this time, since the refrigerant in the first branch pipe 22 has not yet flowed into the boost chamber 21, the refrigerant in the second branch pipe 23 cannot complete the offset. Therefore, noise is still generated before the refrigerant in the first branch pipe 22 enters the boost chamber 21, causing a delay in canceling the noise. Therefore, since the length of the first branch pipe 22 and the second branch pipe 23 of the present invention is equal, the refrigerant flowing out of the first branch pipe 22 and the second branch pipe 23 can reach the boost chamber 21 synchronously, thereby avoiding delays and ensuring that the refrigerant noise can be reduced throughout the entire working process under heating conditions. On the other hand, since the first branch pipe 22 and the second branch pipe 23 are axially symmetrically arranged compared to the baseline, the first branch pipe 22 and the second branch pipe 23 have the same shape, thereby ensuring that the amount of refrigerant flowing out of the first branch pipe 22 and the second branch pipe 23 is consistent and refrigerant balance is achieved, so that the refrigerant flowing out of the first branch pipe 22 and the refrigerant flowing out of the second branch pipe 23 can be completely offset, so that the gas-liquid two-phase refrigerant is completely converted into pure liquid refrigerant, thereby completely eliminating the refrigerant noise.

[0040] As a possible implementation, the booster device 2 further includes a liquid separator 24, the liquid separator 24 includes an inlet end 241, a first outlet end 242, and a second outlet end 243, the inlet end 241 is connected to the refrigerant outlet of the condenser 1, the first outlet end 242 is connected to the other end of the first branch pipe 22, and the second outlet end 243 is connected to the other end of the second branch pipe 23. The inlet end 241 of the liquid separator 24 can be connected to the condensation outlet of the condenser 1 through a refrigerant pipe.

[0041] The above arrangement enables the refrigerant flowing out of the condenser 1 to first enter the liquid separator 24 from the inlet end 241 of the liquid separator 24, and then be divided into two refrigerants by the liquid separator 24, one refrigerant flows into the first branch pipe 22 from the first outlet end 242, and the other refrigerant flows into the second branch pipe 23 from the second outlet end 243, thereby improving the convenience of installation and disassembly of the supercharging device 2 while allowing the refrigerant to enter the supercharging cavity 21 to complete the refrigerant hedging. Among them, the inlet end 241, the first outlet end 242 and the second outlet end 243 can all be hollow columns, such as hollow cylinders.

[0042] As a preferred embodiment, the center lines of the inflow end 241, the first outflow end 242, the second outflow end 243, the first branch pipe 22 and the second branch pipe 23 are located on the same plane. That is to say, the refrigerant flows smoothly in the entire flow path from the inlet end 241 of the liquid separator 24 to the first outflow end 242 and the second outflow end 243 to the first branch pipe 22 and the second branch pipe 23, rather than bending or flowing with corners, thereby avoiding situations where there are bends. For example, when the inlet end 241 bends to the right, the first branch pipe 22 is located on the left, and the second branch pipe 23 is located on the right, the centrifugal force will cause more liquid refrigerant to enter the first branch pipe 22 on the left, while the liquid refrigerant entering the second branch pipe 23 on the right will be less, which will cause uneven flow distribution when the refrigerant in the boost chamber 21 is offset. Therefore, the present invention can ensure balanced refrigerant distribution between the first branch pipe 22 and the second branch pipe 23 through the above-mentioned setting, thereby improving the refrigerant offset effect and achieving complete elimination of refrigerant noise.

[0043] In this case, in the scheme "taking the radial center line of the sphere as the baseline, the first branch pipe and the second branch pipe are arranged axially symmetrically compared to the baseline", the radial center line may be parallel to the center line of the inlet end 241, or may not be parallel to the center line of the inlet end 241, and it can be adaptively adjusted according to the piping conditions of the air conditioner.

[0044] As a possible implementation, when the first inlet 211 and the second inlet 212 are arranged opposite to each other, the number of the first branch pipe 22 and the number of the second branch pipe 23 are both one. That is to say, the refrigerant flowing out of the first branch pipe 22 and the second branch pipe 23 is directly counteracted, and is not interfered by the refrigerant in other directions, thereby further improving the counteracting effect and further reducing the refrigerant noise at the electronic expansion valve.

[0045] In summary, through the above scheme of the present invention, by adding a booster device 2 between the electronic expansion valve and the condenser 1, the refrigerant pressure can be increased, so that the refrigerant state before entering the indoor electronic expansion valve is pure liquid, and the indoor refrigerant sound can be eliminated to the greatest extent under heating conditions. In addition, since the booster device 2 is small in size, it can be directly installed in the original air conditioner indoor unit housing, avoiding the cost increase caused by re-opening the mold.

[0046] It should be noted that the above-mentioned embodiments are only used to illustrate the principles of the present invention and are not intended to limit the scope of protection of the present invention. Without departing from the principles of the present invention, those skilled in the art can adjust the above-mentioned embodiments so that the present invention can be applied to more specific application scenarios.

[0047] For example, although the boost chamber 21 of the present invention is introduced by taking a sphere as an example, this is not intended to limit the protection scope of the present invention. As long as the refrigerant entering the boost chamber 21 from the first branch pipe 22 and the refrigerant entering the boost chamber 21 from the second branch pipe 23 can intersect before reaching the inner wall of the boost chamber 21, the arrangement method can be adjusted. For example, as a relatively inferior implementation, the boost chamber 21 can be replaced with an ellipsoid, etc. These do not deviate from the principles of the present invention and are within the protection scope of the present invention.

[0048] For example, although the present invention is introduced with the number of the first branch pipe 22 and the number of the second branch pipe 23 both being one, this is not intended to limit the scope of protection of the present invention. As long as the refrigerant can be offset in the boost chamber 21, the specific number can be adjusted. For example, the number of the first branch pipe 22 and the second branch pipe 23 are both two, that is, two pairs of the first branch pipe 22 and the second branch pipe 23 are offset in the boost chamber 21, etc. These do not deviate from the principles of the present invention and are within the scope of protection of the present invention.

[0049] For example, the arrangement of the liquid separator 24 can be omitted, and the other end of the first branch pipe 22 and the other end of the second branch pipe 23 can be directly connected to the condenser, etc., wherein the condenser is a condenser connected to the condensation outlet of the condenser 1. These do not deviate from the principles of the present invention and are within the protection scope of the present invention.

[0050] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An air conditioning system, comprising an evaporator, a compressor, a condenser and a throttling element connected in sequence to form a closed loop, It is characterized in that A booster device is provided between the condenser and the throttling element, and the booster device is used to increase the refrigerant pressure so as to liquefy the refrigerant before entering the throttling element; The boosting device comprises a boosting cavity, a first branch pipe and a second branch pipe, the boosting cavity is provided with a first inlet, a second inlet and a liquefied refrigerant outlet, one end of the first branch pipe is connected to the first inlet, the other end of the first branch pipe is connected to the refrigerant outlet of the condenser, one end of the second branch pipe is connected to the second inlet, the other end of the second branch pipe is connected to the refrigerant outlet of the condenser, and the liquefied refrigerant outlet is connected to the inlet of the throttling element; The boosting device is configured so that the refrigerant entering the boosting cavity through the first branch pipe and the refrigerant entering the boosting cavity through the second branch pipe can intersect before reaching the inner wall of the boosting cavity.

2. The air conditioning system according to claim 1, It is characterized in that The pressurized cavity is a sphere.

3. The air conditioning system according to claim 2, It is characterized in that The first inlet and the second inlet are arranged opposite to each other.

4. The air conditioning system according to claim 3, It is characterized in that The liquefied refrigerant outlet is located in the middle of the arc between the first inlet and the second inlet.

5. The air conditioning system according to claim 2, It is characterized in that Taking the radial center line of the sphere as a baseline, the first branch pipe and the second branch pipe are arranged in axisymmetric relation to the baseline.

6. The air conditioning system according to claim 5, It is characterized in that The boosting device also includes a liquid separator, which includes an inlet end, a first outflow end, and a second outflow end. The inlet end is connected to the refrigerant outlet of the condenser, the first outflow end is connected to the other end of the first branch pipe, and the second outflow end is connected to the other end of the second branch pipe.

7. The air conditioning system according to claim 6, It is characterized in that The center lines of the inflow end, the first outflow end, the second outflow end, the first branch pipe, and the second branch pipe are located on the same plane.

8. The air conditioning system according to claim 3, It is characterized in that The number of the first branch pipe and the number of the second branch pipe are both one.

9. The air conditioning system according to claim 1, It is characterized in that The throttling element is an electronic expansion valve.

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