Internal high-pressure compressor and air conditioning system

Abstract

The invention relates to the technical field of air conditioning compressors, in particular to an internal high-pressure compressor and an air conditioning system adopting the same. The compressor is further provided with a cooling pipeline, the cooling pipeline penetrates through the compressor shell to enter the compressor and makes contact with the motor stator for heat exchange, and motor cooling is achieved. After entering the compressor, the cooling pipeline is divided into a plurality of cooling pipeline branches; the motor stator is made of a stator punching sheet with a special shape, and a plurality of notches are processed on the stator punching sheet; the cooling pipeline branch passes through the notch, extends from the motor stator reverse guide side to the motor stator positive guide side, and converges to form a cooling pipeline. According to the technical scheme, the problems that the efficiency of an existing internal high-pressure compressor is low and the low-temperature operation range is difficult to expand due to the fact that the motor operation temperature is high are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning compressors, and particularly to an internally high-pressure compressor and an air-conditioning system using the same. Background Art

[0002] In existing internally high-pressure compressors, the compression operation is mainly driven by a motor: in a scroll compressor, the motor mainly drives a scroll disk for compression operation; in a rotary compressor, the motor mainly drives a rolling rotor for compression operation. The efficiency of the motor greatly affects the overall operating efficiency of the compressor.

[0003] The motors of internally high-pressure compressors are all located on the high-temperature exhaust side of the compressor. Coupled with the heat generated by the motors themselves during operation, the motor temperature gradually increases, resulting in a high-temperature operating state.

[0004] There are two technical deficiencies in the motor temperature of existing internally high-pressure compressors: one is that the motor temperature is high and the operating efficiency is low, which affects the overall operating efficiency of the compressor; the other is that when the compressor operates under extreme conditions, since both the exhaust temperature and the motor heat generation increase, the motor temperature further increases, resulting in a situation where the motor is easily burned out, which is not conducive to expanding the operating range of the compressor, especially for compressors operating at low temperatures or even ultra-low temperatures.

[0005] In view of the problems existing in the above-mentioned prior art, it is very necessary to research and design a new type of internally high-pressure compressor and air-conditioning system to overcome the problems existing in the prior art. Summary of the Invention

[0006] In view of the technical problems of high motor temperature, low motor operating efficiency and small low-temperature operating range in the existing internally high-pressure compressor technology proposed according to the above-mentioned prior art, an internally high-pressure compressor and an air-conditioning system are provided.

[0007] The technical means adopted by the present invention are as follows:

[0008] An internal high-pressure compressor includes a compressor; the compressor includes: an intake pipe, an upper cover, a fixed scroll, a movable scroll, an upper support, a cross ring, an exhaust pipe, a crankshaft, a motor stator, a motor rotor, a shell, a lower support assembly and a lower cover; the fixed scroll and the movable scroll are relatively matched and assembled; the fixed scroll is fixedly connected to the upper support by bolts; the movable scroll is assembled on the top of the crankshaft; an intake pipe is arranged on the upper part of the fixed scroll, the bottom end of the intake pipe is fixedly mounted on the upper part of the fixed scroll, and is the same as its internal cavity, and the top end passes through the upper cover and is placed outside the compressor; the exhaust pipe passes through the compressor shell The body enters the compressor and is located at the lower part of the upper support; the cross ring is placed between the upper support and the fixed scroll, and the keys of the cross ring are placed on the fixed scroll and the movable scroll respectively, which are used to prevent the movable scroll from rotating when the compressor is running; the movable scroll passes through the crankshaft and cooperates with the fixed scroll to perform compression work under the drive of the motor; the motor is composed of a motor stator and a motor rotor, the motor stator is interference-fitted inside the housing, and the motor rotor is interference-fitted on the crankshaft; the crankshaft is placed between the upper support and the lower support assembly, and the oil is supplied to various places from the oil pool of the lower cover through the oil suction pipe in the lower support assembly;

[0009] Furthermore, a cooling pipeline is provided on the compressor;

[0010] Furthermore, the cooling pipeline passes through the compressor housing and enters the interior of the compressor, and exchanges heat with the motor stator to achieve motor cooling.

[0011] Furthermore, after the cooling pipeline enters the compressor, it is divided into multiple cooling pipeline branches;

[0012] Furthermore, the motor stator is made of a stator punching sheet of a special shape, and a plurality of notches are processed on the stator punching sheet;

[0013] Furthermore, the cooling pipeline branch extends from the reverse side of the motor stator to the forward side of the motor stator through the slot and converges into a cooling pipeline;

[0014] Furthermore, the cooling pipe branch cross-section of the cooling pipe branch is in contact with the slot for heat exchange, and the cooling pipe branch cross-section and the slot shape can be set to a circular or rectangular shape or other shapes with a larger contact area. The large contact area between the two is beneficial to the cooling of the motor stator; the cooling pipe branch and the slot are filled and fixed with high thermal conductivity materials such as alumina and aluminum nitride, and high thermal conductivity silicone grease materials can also be added to increase the thermal conductivity effect.

[0015] Furthermore, the compressor includes two structures: one without an air-injection and enthalpy-increasing structure and one with an air-injection and enthalpy-increasing structure.

[0016] Furthermore, when the compressor does not have an air supplement and air content enhancement structure, a plurality of cooling pipeline branches are converged into a cooling pipeline through the notch, and pass through the shell to be placed outside the compressor.

[0017] Further, when the compressor is equipped with a gas replenishing and enthalpy increasing structure, it is divided into two forms: a compressor with a gas replenishing pipe and a compressor without a gas replenishing pipe;

[0018] Further, when the compressor is equipped with a gas replenishing pipe, the bottom end of the gas replenishing pipe is fixedly installed on the upper part of the fixed scroll and communicates with its internal cavity, and the top end passes through the upper cover and is placed outside the compressor; the branch of the cooling pipeline converges into the cooling pipeline through the notch, passes through the housing, and is placed outside the compressor;

[0019] Further, when the compressor does not have a gas replenishing pipe, the branch of the cooling pipeline converges into the cooling pipeline through the notch, is connected to the gas replenishing channel of the fixed scroll through the upper support, and the gas replenishing channel of the fixed scroll communicates with the internal cavity.

[0020] An air conditioning system using an internally high-pressure compressor includes: a compressor, a four-way reversing valve, a condenser, and an evaporator;

[0021] Further, the output end of the evaporator is connected to the input end of the four-way reversing valve, and the output end of the four-way reversing valve is connected to the suction pipe of the compressor;

[0022] Further, the input end of the condenser is connected to the output end of the four-way reversing valve, and the input end of the four-way reversing valve is connected to the exhaust pipe of the compressor.

[0023] Further, since the compressors used in the air conditioning system with an internally high-pressure compressor are divided into those without a gas replenishing and enthalpy increasing structure and those with a gas replenishing and enthalpy increasing structure, they have different system structures;

[0024] Further, when the compressor does not have a gas replenishing and enthalpy increasing structure, the outlet of the evaporator is connected to the cooling pipeline inlet of the compressor, and the outlet of the cooling pipeline is connected to the evaporator through solenoid valve A and an expansion valve;

[0025] Further, when the compressor has a gas replenishing and enthalpy increasing structure, it is also divided into two forms: with a gas replenishing pipe and without a gas replenishing pipe;

[0026] Further, when the compressor with a gas replenishing and enthalpy increasing structure also has a gas replenishing pipe, an economizer is also provided inside the system; the auxiliary circuit of the economizer is connected to the gas replenishing pipe of the compressor through solenoid valve B; the main circuit inlet of the economizer is connected to the condenser, and the main circuit outlet of the economizer is connected to the inlet of the evaporator through solenoid valve A and an expansion valve; the branch of the main circuit before the economizer is connected to the cooling pipeline inlet of the compressor, and the outlet of the cooling pipeline converges with the main circuit outlet pipeline of the economizer and is connected to solenoid valve A and the expansion valve;

[0027] Furthermore, when the compressor with an air-injection and enthalpy-increasing structure does not have an air-injection pipe, an economizer is also provided inside the system; the auxiliary circuit of the economizer is connected to the cooling circuit inlet of the internal high-pressure compressor through an electromagnetic valve B; the main circuit inlet of the economizer is connected to the condenser, and the main circuit outlet of the economizer is connected to the evaporator inlet through an electromagnetic valve A and an expansion valve.

[0028] The internal high-pressure compressor and air-conditioning system adopted in the present invention exchanges heat with the compressor stator through the medium-temperature or low-temperature refrigerant in the system, so that the temperature of the motor stator is reduced, thereby reducing the overall temperature of the motor, achieving the purpose of improving the operating efficiency of the motor, thereby improving the operating efficiency of the compressor; the reduction in motor temperature is conducive to the compressor expanding the operating range to lower temperature conditions (i.e., low evaporation conditions), solving the problem of low low-temperature operation reliability of low-temperature heat pump units; for conventional working conditions, if the ultimate compressor operating efficiency is not required, the motor temperature can be reduced to reduce the motor thickness, save motor costs, and increase the economic benefits of the compressor.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. The internal high-pressure compressor provided by the present invention can reduce the motor temperature through the cooling pipeline, thereby improving the operating efficiency of the compressor and improving the energy efficiency of the compressor under all working conditions;

[0031] 2. The internal high-pressure compressor provided by the present invention can greatly improve the previous situation that the internal high-pressure compressor has high heat generation and high temperature when running at low temperature, is difficult to use as a whole, and has a short service life. It can achieve stable, reliable, continuous and wide-range operation at a lower evaporation temperature, greatly improving the use difficulties of low ambient temperature heat pumps;

[0032] 3. The internal high-pressure compressor provided by the present invention has a simple structure, low design cost, and a wide range of applications. Combined with the system control method provided by the present invention, it can be generally applied to current air-conditioning units.

[0033] In summary, the technical solution of the present invention solves the problems of low operating efficiency and small operating range caused by high motor temperature in the existing internal high-pressure compressor technology in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1Schematic structural diagram of an internal high-pressure compressor with an air supplement and enthalpy increase structure and an air supplement pipe according to the present invention;

[0036] Figure 2 Schematic structural diagram of an internal high-pressure compressor with an air supplement and enthalpy increase structure but without an air supplement pipe according to the present invention;

[0037] Figure 3 Schematic structural diagram of an internal high-pressure compressor without an air supplement and enthalpy increase structure according to the present invention;

[0038] Figure 4 Schematic diagram of the interface shape between the stator punching slot and the cooling pipeline branch of the present invention.

[0039] Figure 5 System diagram of an internal high-pressure compressor with an air supplement and enthalpy increase structure and an air supplement pipe according to the present invention;

[0040] Figure 6 System diagram of an internal high-pressure compressor with an air supplement and enthalpy increase structure but without an air supplement pipe according to the present invention;

[0041] Figure 7 System diagram of an internal high-pressure compressor without an air supplement and enthalpy increase structure according to the present invention;

[0042] In the figure: In the figure: 1. Suction pipe 2. Upper cover 3. Fixed scroll 4. Moving scroll 5. Upper support 6. Cross ring, 7. Exhaust pipe 8. Crankshaft 9. Motor stator 10. Motor rotor 11. Housing 12. Lower support assembly 13. Lower cover 14. Cooling pipeline 15. Air supplement pipe 16. Oil suction pipe 17. Oil sump 18. Cooling pipeline branch 19. Cross section of the cooling pipeline branch 21. Motor stator punching sheet 22. Cooling pipeline inlet 23. Cooling pipeline outlet 24. Fixed scroll air supplement channel 30. Internal high-pressure compressor 31. Four-way reversing valve 32. Condenser 33. Evaporator 34. Economizer 35a. Solenoid valve A 35b. Solenoid valve B 36. Expansion valve. Detailed implementation manners

[0043] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. The following description of at least one exemplary embodiment is actually illustrative only and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0046] Unless otherwise specifically stated, the relative arrangements, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be construed as limiting the protection scope of the present invention: the orientation words "inside, outside" refer to inside and outside the contour of each component itself.

[0048] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature shown in the figures with respect to other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made.

[0049] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is merely for the convenience of distinguishing the corresponding components. Without additional statements, the above terms have no special meanings and thus should not be construed as limiting the scope of protection of the present invention.

[0050] As Figures 1-3 shown, an internal high-pressure compressor; the main body is the compressor 30; the compressor 30 further includes: an intake pipe 1, an upper cover 2, a fixed scroll 3, a moving scroll 4, an upper support 5, a cross ring 6, an exhaust pipe 7, a crankshaft 8, a motor stator 9, a motor rotor 10, a housing 11, a lower support assembly 12, and a lower cover 13;

[0051] The fixed scroll 3 is relatively and cooperatively assembled with the moving scroll 4; the fixed scroll 3 is fixedly connected to the upper support 5 by bolts; the moving scroll 4 is assembled on the top of the crankshaft 11;

[0052] The upper part of the fixed scroll 3 is provided with an intake pipe 1. The bottom end of the intake pipe 1 is fixedly installed on the upper part of the fixed scroll 3 and communicates with its internal cavity. The top end passes through the upper cover 2 and is placed outside the compressor;

[0053] The cross ring 6 is placed between the upper support and the fixed scroll. The keys of the cross ring 6 are respectively placed on the fixed scroll 3 and the moving scroll 4 to prevent the moving scroll 4 from rotating self during the operation of the compressor;

[0054] The moving scroll 4 is driven by the crankshaft 8 under the drive of the motor and cooperates with the fixed scroll 3 to perform compression work;

[0055] The motor is composed of a motor stator 9 and a motor rotor 10. The motor stator 9 is press-fitted inside the housing 11, and the motor rotor 10 is press-fitted on the crankshaft 8;

[0056] The crankshaft 8 is placed between the upper support 5 and the lower support assembly 12, and oil is supplied from the oil sump 17 of the lower cover 13 to various places through the oil suction pipe 16 in the lower support assembly 12;

[0057] The compressor 30 further includes a cooling pipeline 14; the cooling pipeline 14 passes through the compressor housing 11 and enters the interior of the compressor, contacts the motor stator 9 for heat exchange, and realizes motor cooling;

[0058] After the cooling pipeline 14 enters the compressor, it is branched into multiple cooling pipeline branches 18;

[0059] As Figure 4 shown, the motor stator 9 is made of stator punching sheets 21 with special shapes, and there are multiple notches 20 on the stator punching sheets 21; the cooling pipeline branches 18 pass through the notches 20 and contact the motor stator 9 for heat exchange. The cross-section 19 of the cooling pipeline branch pipe and the shape of the notch 20 can be set to the original circular or rectangular or other shapes with a larger contact area. The large contact area between the two is beneficial to the cooling of the motor stator; the cooling pipeline branches 18 and the notches 20 can be filled and fixed with high thermal conductivity materials such as alumina and aluminum nitride, or high thermal conductivity silicone grease materials can be added to fill, so as to increase the heat conduction effect.

[0060] As Figures 1-3 shown, the cooling pipeline branches 18 extend from the reverse conduction side of the motor stator 8 to the forward conduction side of the motor stator 8 and converge into a cooling pipeline 14;

[0061] As Figure 1 shown, the compressor has a gas injection and enthalpy increase structure, and the compressor has a gas supply pipe 15 structure. The bottom end of the gas supply pipe 15 is fixedly installed on the upper part of the fixed scroll 3 and communicates with its internal cavity, and the top end passes through the upper cover 2 and is placed outside the compressor; the cooling pipeline branches 18 pass through the notches 20, then converge into a cooling pipeline 14, pass through the housing 11, and are placed outside the compressor;

[0062] As Figure 2 shown, the compressor has a gas injection and enthalpy increase structure, and the compressor does not have a gas supply pipe structure. The cooling pipeline 14 passes through the compressor housing 11 and enters the interior of the compressor, is branched into multiple cooling pipeline branches 18, passes through the notches 20, converges into a cooling pipeline 14, and is connected to the fixed scroll gas injection channel 24 through the upper support 5, and the fixed scroll gas injection channel 24 communicates with the internal cavity;

[0063] As Figure 3 shown, when the compressor does not have a gas injection and enthalpy increase structure, the cooling pipeline branches 18 pass through the notches 20, then converge into a cooling pipeline 14, pass through the housing 11, and are placed outside the compressor;

[0064] As shown in FIGS. 5-7, an air-conditioning system using an internally high-pressure compressor includes an internally high-pressure compressor 30. The air-conditioning system further includes: an expansion valve 36, a solenoid valve 35, a four-way reversing valve 31, a condenser 32, and an evaporator 33;

[0065] The output end of the evaporator 33 is connected to the input end of the four-way reversing valve 31, and the output end of the four-way reversing valve 31 is connected to the suction pipe 1 of the internally high-pressure compressor 30;

[0066] The input end of the condenser 32 is connected to the output end of the four-way reversing valve 31, and the input end of the four-way reversing valve 31 is connected to the exhaust pipe 7 of the internally high-pressure compressor 30;

[0067] As Figures 5-6 shown, this system uses Figure 1 and Figure 2 the compressor structure shown, that is, the internally high-pressure compressor has a gas-increasing and enthalpy-increasing structure, and an economizer 34 is also provided in this system;

[0068] As Figure 5 shown, this system uses Figure 1 the compressor shown, that is, the compressor has a gas supply pipe 15. The auxiliary path of the economizer 34 in the system is connected to the gas supply pipe 15 of the internally high-pressure compressor 30 through the solenoid valve B 35b; the main path inlet of the economizer 34 is connected to the condenser 32, and the main path outlet of the economizer 34 passes through the solenoid valve A 35a and the expansion valve 36 and is connected to the inlet of the evaporator 33; the branch of the main path in front of the economizer 34 is connected to the inlet 22 of the compressor cooling pipeline, and the outlet 23 of the cooling pipeline converges with the main path outlet pipeline of the economizer 34 and is connected to the solenoid valve A 35a and the expansion valve 36;

[0069] As Figure 6 shown, this system uses Figure 2 the compressor shown, that is, the compressor has no gas supply pipeline. The auxiliary path of the economizer 34 in the system is connected to the cooling pipeline inlet 22 of the internally high-pressure compressor 30 through the solenoid valve B 35b; the main path inlet of the economizer 34 is connected to the condenser 32, and the main path outlet of the economizer 34 passes through the solenoid valve A 35a and the expansion valve 36 and is connected to the inlet of the evaporator 33;

[0070] As Figure 7 shown, this system uses Figure 3 the compressor shown, that is, the compressor has no gas-increasing and enthalpy-increasing structure, there is no economizer 34 in the system, the outlet of the evaporator 32 is connected to the cooling pipeline inlet 22 of the compressor, and the outlet 23 of the cooling pipeline is connected to the evaporator 33 through the solenoid valve A 35a and the expansion valve 36.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An internal high-pressure compressor, comprising a compressor (30); the compressor (30) comprising: An intake pipe (1), an upper cover (2), a fixed scroll (3), a movable scroll (4), an upper support (5), a cross ring (6), an exhaust pipe (7), a crankshaft (8), a motor stator (9), a motor rotor (10), a housing (11), a lower support assembly (12) and a lower cover (13); the fixed scroll (3) and the movable scroll (4) are assembled in a relatively matched manner; the fixed scroll (3) is fixedly connected to the upper support (5) by bolts; the movable scroll (4) is assembled on the top of the crankshaft (8); an intake pipe (1) is arranged on the upper part of the fixed scroll (3); the bottom end of the intake pipe (1) is fixedly mounted on the upper part of the fixed scroll (3) and is the same as its internal cavity, and the top end passes through the upper cover (2) and is then placed outside the compressor; the exhaust pipe (7) passes through the compressor housing (11) and enters the interior of the compressor, and is positioned The invention relates to a compressor comprising a plurality of rotating scrolls (10, 11, 12 and 13) and a plurality of rotating scrolls (14, 16 and 17) arranged at the bottom of the upper support (5); a cross ring (6) is arranged between the upper support and the fixed scroll, and keys of the cross ring (6) are respectively arranged on the fixed scroll (3) and the movable scroll (4) to prevent the movable scroll (4) from rotating when the compressor is running; the movable scroll (4) cooperates with the fixed scroll (3) to perform compression work through the crankshaft (8) under the drive of the motor; the motor comprises a motor stator (9) and a motor rotor (10), the motor stator (9) is interference-fitted inside the housing (11), and the motor rotor (10) is interference-fitted on the crankshaft (8); the crankshaft (8) is arranged between the upper support (5) and the lower support assembly (12), and oil is supplied to various places from the oil pool (17) of the lower cover (13) through the oil suction pipe (16) in the lower support assembly (12); the compressor is characterized in that: The compressor (30) is also provided with a cooling pipeline (14); The cooling pipeline (14) passes through the compressor housing (11) and enters the interior of the compressor, and contacts and exchanges heat with the motor stator (9) to achieve motor cooling.

2. The internal high pressure compressor according to claim 1, characterized in that: After entering the compressor, the cooling pipeline (14) is divided into a plurality of cooling pipeline branches (18); The motor stator (9) is made of a stator punching sheet (21) of a special shape, and a plurality of notches (20) are processed on the stator punching sheet (21); The cooling pipeline branch (18) passes through the notch (20), extends from the reverse side of the motor stator (8) to the forward side of the motor stator (8), and converges into a cooling pipeline (14); The cooling pipe branch section (19) of the cooling pipe branch (18) is in contact with the slot (20) for heat exchange. The shapes of the cooling pipe branch section (19) and the slot (20) can be set to the original circular or rectangular shape or other shapes with a larger contact area. The large contact area between the two is beneficial to the cooling of the motor stator. The cooling pipe branch (18) and the slot (20) are filled and fixed by a high thermal conductivity material such as aluminum oxide and aluminum nitride, and a high thermal conductivity silicone grease material can also be added to increase the thermal conductivity effect.

3. The internal high pressure compressor according to claim 1, characterized in that: The compressor (30) comprises two structures: one without an air-supplying enthalpy-increasing structure and one with an air-supplying enthalpy-increasing structure.

4. The internal high pressure compressor according to claim 3, characterized in that: When the compressor (30) does not have an air supply and air content enhancement structure, a plurality of cooling pipeline branches (18) are converged into a cooling pipeline (14) through the notch (20), and pass through the shell (11) to be placed outside the compressor.

5. The internal high pressure compressor according to claim 3, characterized in that: When the compressor (30) is provided with an air supply enthalpy increasing structure, it is further divided into two types: a compressor (30) provided with an air supply pipe (15) and a compressor (30) not provided with an air supply pipe (15); When the compressor (30) is provided with an air supply pipe (15), the bottom end of the air supply pipe (15) is fixedly mounted on the upper part of the fixed scroll (3) and communicates with the internal cavity thereof, and the top end passes through the upper cover (2) and is placed outside the compressor; the cooling pipeline branch (18) passes through the notch (20) and converges into a cooling pipeline (14), passes through the housing (11), and is placed outside the compressor; When the compressor (30) does not have an air supply pipe (15), the cooling pipeline branch (18) passes through the notch (20) and converges into a cooling pipeline (14), which is connected to the fixed vortex air supply channel (24) through the upper support (5), and the fixed vortex air supply channel (24) is communicated with the internal cavity.

6. An air conditioning system using an internal high-pressure compressor, characterized in that: The air conditioning system using an internal high-pressure compressor comprises: a compressor (30), a four-way reversing valve (31), a condenser (32), and an evaporator (33); The output end of the evaporator (33) is connected to the input end of the four-way reversing valve (31), and the output end of the four-way reversing valve (31) is connected to the suction pipe (1) of the compressor (30); The input end of the condenser (32) is connected to the output end of the four-way reversing valve (31), and the input end of the four-way reversing valve (31) is connected to the exhaust pipe (7) of the compressor (30).

7. The air conditioning system using an internal high-pressure compressor according to claim 6, characterized in that: The air conditioning system using an internal high-pressure compressor has different system structures because the compressor (30) used is divided into one without an air-supplying enthalpy-increasing structure and one with an air-supplying enthalpy-increasing structure; When the compressor (30) does not have an air replenishing enthalpy increasing structure, the outlet of the evaporator (32) is connected to the cooling pipeline inlet (22) of the compressor (30), and the cooling pipeline outlet (23) is connected to the evaporator (33) via the solenoid valve A (35A) and the expansion valve (36); When the compressor (30) is provided with an air supply enthalpy increasing structure, it is also divided into two types: one with an air supply pipe (15) and one without an air supply pipe (15); When the compressor (30) having an air supply enthalpy increase structure also has an air supply pipe (15), an economizer (34) is also provided inside the system; the auxiliary circuit of the economizer (34) is connected to the air supply pipe (15) of the compressor (30) through an electromagnetic valve B (35b); the main circuit inlet of the economizer (34) is connected to the condenser (32), and the main circuit outlet of the economizer (34) is connected to the evaporator (33) inlet through an electromagnetic valve A (35a) and an expansion valve (36); the main circuit branch before the economizer (34) is connected to the compressor cooling pipeline inlet (22), and the cooling pipeline outlet (23) and the main circuit outlet pipeline of the economizer (34) converge and are connected to the electromagnetic valve A (35a) and the expansion valve (36); When the compressor (30) having an air supply enthalpy increase structure does not have an air supply pipe (15), an economizer (34) is also provided inside the system; the auxiliary circuit of the economizer (34) is connected to the cooling pipe inlet (22) of the internal high-pressure compressor (30) through an electromagnetic valve B (35b); the main circuit inlet of the economizer (34) is connected to the condenser (32), and the main circuit outlet of the economizer (34) is connected to the evaporator (33) inlet through an electromagnetic valve A (35a) and an expansion valve (36).

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