A make-up gas compressor, air conditioner and control method

Abstract

The application provides a gas supplement compressor, an air conditioner and a control method. The gas supplement compressor comprises a shell, a first pump body and a second pump body. The first pump body and the second pump body are arranged in the shell. The shell has a suction cavity. The first pump body is provided with a first suction port, a first exhaust port and a first gas supplement port. The second pump body is provided with a second suction port and a second exhaust port. The first suction port and the second suction port are communicated with the suction cavity for suction. The second exhaust port can be communicated with the first gas supplement port, so that the compressed gas in the second pump body can be supplemented into the first pump body from the first gas supplement port. According to the application, the suction is effectively compressed and pressurized by the second pump body, and the first pump body compression cavity is supplemented with gas, so that the suction mass flow of the first pump body is effectively improved, the total suction mass flow of the compressor is improved, and the refrigeration / heating capacity is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a supplementary air compressor, an air conditioner and a control method. BACKGROUND

[0002] For compressors, it is always desirable to operate at a higher efficiency speed. In the actual use of scroll compressors, there are cases where the suction volume is insufficient and the displacement or the supplementary air volume needs to be increased to produce more refrigeration / heating capacity. In particular, in low-temperature heat pump application scenarios, the low temperature and small density of the suction refrigerant result in a significant reduction in the refrigerant mass per unit suction volume, so larger displacement pump assemblies or higher compressor speeds are used to achieve greater heating capacity. However, using a large displacement pump assembly will undoubtedly increase the radial size of the compressor, which is not conducive to miniaturization. Increasing the speed will reduce the efficiency of the compressor and adversely affect the reliability of the pump.

[0003] Patent (CN110630498A Scroll refrigeration compressor with suction supercharging) proposes a suction supercharging structure to improve the suction mass flow rate. However, this open supercharging mode has the problem of pressure drop after exhaust, and cannot achieve effective compression supercharging. Patents CN113323876A and CN114215761A provide a supercharging fan at the suction port to supercharge the suction pressure (as shown in the background art Figure 1 The size of the supercharging fan is greatly limited and the driving force is limited in this way, so the above methods have limited effect on improving suction compression and flow rate.

[0004] Patent CN110285060A proposes a dual-stage multi-supplementary air screw compressor structure to achieve two-stage compression of refrigerant and improve suction volume (as shown in the background art Figure 2 The suction volume improvement comes from the flow guide outside the condenser. This method increases the flow guide outside the condenser based on traditional two-stage compression. For scroll compressors, this method will further increase the size of the compressor and make the overall structure of the compressor more complex. Moreover, for refrigeration conditions, the increase in supplementary air volume does not help to improve the refrigeration capacity.

[0005] Due to the low suction flow rate of the compressor in the prior art, especially the low suction mass flow rate in low-temperature heat pump applications, the present application provides a supplementary air compressor, an air conditioner and a control method. SUMMARY

[0006] Therefore, the present application aims to overcome the low suction flow rate of the compressor in the prior art, and provides a supplementary air compressor, an air conditioner and a control method.

[0007] To solve the above problems, the application provides a gas supplement compressor, which comprises:

[0008] The shell, the first pump body and the second pump body are arranged inside the shell, and the inside of the shell has a suction cavity; the first pump body is provided with a first suction port, a first exhaust port and a first gas supplement port, and the second pump body is provided with a second suction port and a second exhaust port; the first suction port and the second suction port are communicated with the suction cavity for suction; the second exhaust port can be communicated with the first gas supplement port, so that the compressed gas in the second pump body can be supplemented into the first pump body from the first gas supplement port.

[0009] In some embodiments, a front cover is further included, the inside of the shell is provided with a shell inner gas supplement channel, the inside of the front cover is provided with a front cover inner gas supplement channel, one end of the shell inner gas supplement channel can be communicated with the second exhaust port of the second pump body, the other end is communicated with one end of the front cover inner gas supplement channel, and the other end of the front cover inner gas supplement channel can be communicated with the first gas supplement port.

[0010] In some embodiments, the first pump body comprises a first static disc and a first dynamic disc, the first gas supplement port is arranged on the first static disc, the first dynamic disc and the first static disc enclose a first compression cavity and a second compression cavity, and the first gas supplement port has at least two, wherein at least one first gas supplement port is arranged to be communicated with the first compression cavity, and at least one first gas supplement port is arranged to be communicated with the second compression cavity.

[0011] In some embodiments, a connecting plate is further included, the connecting plate is arranged at a position between the front cover and the first static disc, the inside of the connecting plate is further provided with a first through hole, one end of the first through hole can be communicated with the other end of the front cover inner gas supplement channel, and the other end of the first through hole is communicated with the first gas supplement port.

[0012] In some embodiments, the other end of the front cover inner gas supplement channel is provided with a first valve piece and a first valve piece baffle; a sealing structure is further arranged between the front cover and the connecting plate; the connecting plate comprises a connecting main body and a first protruding part, the connecting main body is a plate structure and is connected with the sealing structure, the first protruding part is arranged on the end face of the connecting main body towards the first static disc and protrudes outward, the first static disc is provided with a first groove, the first protruding part is inserted and matched with the first groove, one end of the first gas supplement port is communicated with the first compression cavity or the second compression cavity, and the other end is communicated with the first through hole through the first groove.

[0013] In some embodiments, the first static disk is further provided with a second gas supplement port, the second gas supplement port is also capable of introducing gas from outside the compressor to supplement the first pump body, and the second gas supplement port has at least two, at least one of which is arranged in a position communicating with the first compression cavity, and at least one of which is arranged in a position communicating with the second compression cavity.

[0014] In some embodiments, when the gas supplement compressor further comprises a front cover, the inside of the front cover is further provided with a front cover outer gas supplement channel, one end of the front cover outer gas supplement channel is capable of introducing gas from outside the compressor, and the other end is capable of communicating with the second gas supplement port; the other end of the front cover outer gas supplement channel is provided with a second valve plate and a second valve plate baffle.

[0015] In some embodiments, when the gas supplement compressor further comprises a connecting plate, the inside of the connecting plate is further provided with a second through hole, one end of the second through hole is capable of communicating with the other end of the front cover outer gas supplement channel, and the other end of the second through hole communicates with the second gas supplement port.

[0016] In some embodiments, when the connecting plate comprises a connecting body, the connecting plate further comprises a second protruding part, the second protruding part is arranged on the end face of the connecting body on the side facing the first static disk and protrudes outward, the first static disk is provided with a second groove, the second protruding part is inserted and matched with the second groove, one end of the second gas supplement port communicates with the first compression cavity or the second compression cavity, and the other end communicates with the second through hole through the second groove.

[0017] In some embodiments, the second pump body comprises a second static disk, a second dynamic disk and a second static disk cover plate, the second gas outlet is arranged on the second static disk, and a medium-pressure exhaust cavity is formed between the second static disk cover plate and the second static disk, the inside of the second static disk is further provided with a second static disk inner gas supplement channel, one end of the medium-pressure exhaust cavity communicates with the second gas outlet, the other end communicates with one end of the second static disk inner gas supplement channel, and the other end of the second static disk inner gas supplement channel communicates with one end of the shell inner gas supplement channel.

[0018] In some embodiments, a crankshaft is further included, the first pump body and the second pump body are both driven by the crankshaft, and the first dynamic disk and the second dynamic disk are both sleeved on the crankshaft and can be driven to rotate by the crankshaft.

[0019] A second exhaust valve plate and a second exhaust baffle are arranged at the second gas outlet; a first exhaust valve plate and a first exhaust baffle are arranged at the first gas outlet.

[0020] In some embodiments, the second static plate comprises a plurality of second static plate scroll teeth, the second dynamic plate comprises a plurality of second dynamic plate scroll teeth, the second static plate scroll teeth and the second dynamic plate scroll teeth are one-to-one corresponding to form a plurality of third compression cavities, and the second exhaust port also has a plurality of second exhaust ports, each of the third compression cavities is one-to-one corresponding to be provided with one of the second exhaust ports.

[0021] In some embodiments, the second pump body comprises a centrifugal turbine, an upper cover plate and a lower support structure, the centrifugal turbine is arranged between the upper cover plate and the lower support structure, the air charge compressor further comprises a crankshaft, the first dynamic plate and the centrifugal turbine are sleeved on the crankshaft and can be driven to rotate by the crankshaft to perform compression, the second suction port is arranged on the lower support structure and axially sucks air, and the second exhaust port is located on the radial outer side of the centrifugal turbine and on the lower support structure and radially discharges air.

[0022] The application further provides an air conditioner comprising the air charge compressor.

[0023] In some embodiments, when the first pump body comprises a first static plate and a second air charge port is arranged on the first static plate, the air conditioner further comprises an evaporator, a condenser and a throttling device, and the second air charge port can introduce refrigerant gas from an outlet of the condenser.

[0024] The application further provides a control method of the air conditioner, comprising:

[0025] a judging step of judging whether the operation condition is a normal operation condition or a low-temperature heating condition;

[0026] a control step of, when the operation condition is the normal operation condition, only opening the first air charge port to charge air to the first pump body, closing the second air charge port and operating in a single internal air charge mode; and when the operation condition is the low-temperature heating condition, simultaneously opening the first air charge port and the second air charge port and operating in an internal and external air charge mode.

[0027] The air charge compressor, the air conditioner and the control method provided by the application have the following beneficial effects:

[0028] 1. The present application sets two pump body structures inside the compressor, the suction ports of the first pump body and the second pump body normally suck air from the suction chamber, and the second exhaust port of the second pump body is used to guide the compressed gas to the first air supplement port of the first pump body, so as to effectively supplement the air of the first pump body, effectively compress and boost the suction air through the second pump body, and supplement the air of the compression chamber of the first pump body, so as to effectively improve the suction mass flow of the first pump body, and then improve the total suction mass flow of the compressor, so that the compressor can run at a higher efficiency speed, while improving the compression chamber pressure of the driving and static disc in the initial stage, reducing the compression ratio, improving the under-compression condition of the driving and static disc, and further improving the compressor efficiency and reliability; the present application can realize effective supercharging and air supplement of suction without increasing the radial size, improve the suction mass flow, improve the refrigeration / heat capacity, make the compressor run at a higher efficiency speed, reduce the compression ratio of the driving and static disc, and improve the compressor efficiency and reliability.

[0029] 2. The present application also sets the second air supplement port on the first pump body, which can introduce refrigerant gas from the outside of the compressor through the second air supplement port, further improve the air supplement amount of the first pump body, especially for the problem of low suction mass flow in low-temperature heat pump operation, improve the suction mass flow in low-temperature heat pump operation, improve the refrigeration / heat capacity, and further improve the efficiency and reliability of the compressor; the present application also sets the second pump body to be sleeved on the crankshaft together with the first pump body, so that the first and second pump bodies can be driven by one crankshaft to perform compression, further saving components, reducing space, making the structure more compact, and improving the suction amount of the compressor and the refrigeration / heat efficiency of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a front view of the compressor in the background art;

[0031] Figure 2 is an external structure diagram of the compressor in the background art;

[0032] Figure 3 is a top view of the first static disc position of the air supplement compressor of the present application;

[0033] Figure 4 is a cross-sectional view of D-D corresponding to Figure 3 Example 1;

[0034] Figure 4a is a partial enlarged view of part A of Figure 4 ;

[0035] Figure 5 is a cross-sectional view of E-E corresponding to Figure 3 Example 1;

[0036] Figure 5a is a partial enlarged view of part B of Figure 5

[0037] Figure 6 is a cross-sectional view of F-F corresponding to Figure 3

[0038] Figure 6a is a partial enlarged view of part D of Figure 6

[0039] Figure 7 is a top view at the front cover assembly of the charge air compressor of the present invention (without the connecting plate);

[0040] Figure 8 is a top view at the front cover assembly of the charge air compressor of the present invention (with the connecting plate);

[0041] Figure 9 is a cross-sectional view of the second static disc of the charge air compressor of the present invention, embodiment one;

[0042] Figure 10 is a cross-sectional view of D-D corresponding to Figure 3

[0043] Figure 10a is a partial enlarged view of part C of Figure 10

[0044] Figure 11 is a structural view of the centrifugal turbine in Figure 10

[0045] Figure 12 is a view of the centrifugal turbine assembled with the lower support structure in Figure 10 The reference signs are indicated as:

[0046]

[0047] ​​​​​​​1, housing; 10, suction cavity; 11, internal air supplement passage of housing; 2, first pump body; 21, first suction port; 22, first exhaust port; 23, first air supplement port; 24, second air supplement port; 25, first static disc; 26, first dynamic disc; 27, first groove; 28, second groove; 29, first exhaust valve plate; 210, first exhaust baffle; 211, mounting hole; 3, second pump body; 31, second suction port; 32, second exhaust port; 33, second static disc; 331, second static disc scroll tooth; 34, second dynamic disc; 341, second dynamic disc scroll tooth; 35, second static disc cover plate; 36, medium pressure exhaust cavity; 37, internal air supplement passage of second static disc; 38, second exhaust valve plate; 39, second exhaust baffle; 310, centrifugal turbine; 311, upper cover plate; 312, lower support structure; 4, front cover; 41, internal air supplement passage of front cover; 42, first valve plate; 43, first valve plate baffle; 44, external air supplement passage of front cover; 45, second valve plate; 46, second valve plate baffle; 47, air supplement valve plate baffle screw; 5, connecting plate; 51, first through hole; 52, connecting main body; 53, first protruding part; 54, second through hole; 55, second protruding part; 56, air supplement sealing ring; 6, sealing structure; 7, crankshaft; 81, main support; 82, second support. DETAILED DESCRIPTION

[0048] As Figures 3-12 shown, the application provides an air supplement compressor, which comprises:

[0049] a housing 1, a first pump body 2 and a second pump body 3, the first pump body 2 and the second pump body 3 are arranged inside the housing 1, and the inside of the housing 1 has a suction cavity 10; the first pump body 2 is provided with a first suction port 21, a first exhaust port 22 and a first air supplement port 23, the second pump body 3 is provided with a second suction port 31 and a second exhaust port 32, the first suction port 21 and the second suction port 31 are both communicated with the suction cavity 10 for suction; the second exhaust port 32 can be communicated with the first air supplement port 23, so that the gas compressed in the second pump body 3 can be supplemented into the first pump body 2 from the first air supplement port 23.

[0050] The application can effectively improve the suction mass flow of the first pump body, and further improve the total suction mass flow of the compressor, so that the compressor can operate at a higher efficiency speed, and the compression cavity pressure of the driving and static disc in the initial stage is improved, the compression ratio is reduced, the under-compression condition of the driving and static disc is improved, and the compressor efficiency and reliability are further improved; the application can realize effective supercharging and air supplement of suction without increasing the radial size, improve the suction mass flow, improve the refrigeration / heat capacity, make the compressor operate at a higher efficiency speed, reduce the compression ratio of the driving and static disc, and improve the compressor efficiency and reliability.

[0051] In some embodiments, the shell 1 is internally provided with a shell internal air supplement channel 11, the front cover 4 is internally provided with a front cover internal air supplement channel 41, one end of the shell internal air supplement channel 11 is in communication with the second exhaust port 32 of the second pump body 3, the other end is in communication with one end of the front cover internal air supplement channel 41, and the other end of the front cover internal air supplement channel 41 is in communication with the first air supplement port 23. This is a preferred structure of the application, the shell internal air supplement channel arranged in the shell can absorb the compressed gas from the second pump body, so that the internal air supplement is delivered to the compression cavity of the first pump body through the front cover internal air supplement channel arranged in the front cover, the air supplement in the compression cavity is completed, and the compressed gas of the second pump body does not communicate with the suction cavity in the shell, so that the effect of improving the suction amount of the first pump body by the pressure acting on the first pump body is effectively ensured.

[0052] The application provides a double-air-supplement scroll compressor structure, which realizes effective supercharging and air supplement of suction without increasing the radial size, improves the suction mass flow, especially improves the low suction mass flow of a low-temperature heat pump, improves the refrigeration / heat capacity, makes the compressor operate at a higher efficiency speed, reduces the compression ratio of the driving and static disc, and improves the compressor efficiency and reliability.

[0053] The application can solve the following technical problems:

[0054] 1. Improve the suction mass flow of the compressor, especially improve the problem of low suction mass flow when the low temperature heat pump;

[0055] 2. Increase the refrigeration / heating capacity, reduce the operating speed of the compressor, and improve the reliability;

[0056] 3. Achieve effective suction supercharging and reduce the compression ratio of the driving and static disc.

[0057] The present application is to introduce air into the compression cavity of the driving and static disc while maintaining the suction of the driving and static disc. The second driving and static disc can achieve effective compression and supercharging of the suction, and supplement air to the compression cavity of the driving and static disc, thereby improving the suction mass flow. Therefore, the compressor can operate at a higher efficiency speed, while increasing the compression cavity pressure of the driving and static disc at the initial stage, reducing the compression ratio, improving the under-compression condition of the driving and static disc, and further improving the efficiency and reliability of the compressor. Compared with the traditional integrated two-stage compressor, the present application can improve the suction mass flow in a relatively small size space, and can reduce the compression ratio to a certain extent, and has better adaptability in the case of large refrigeration / heating capacity demand.

[0058] In some embodiments, the first pump body 2 includes a first static disc 25 and a first driving disc 26, the first air supplement port 23 is arranged on the first static disc 25, the first driving disc 26 and the first static disc 25 form a first compression cavity and a second compression cavity, and the first air supplement port 23 has at least two, at least one of which is arranged in communication with the first compression cavity, and at least one of which is arranged in communication with the second compression cavity. The first pump body of the present application preferably includes a first static disc and a first driving disc, which can perform compression in two crescent cavities in the first and second compression cavities through relative movement. The present application can effectively improve the suction of the two compression cavities and improve the refrigeration capacity and refrigeration effect of the two compression cavities by arranging the first air supplement port in communication with the two compression cavities.

[0059] In some embodiments, a connecting plate 5 is further included, which is arranged between the front cover 4 and the first static disc 25, and the inside of the connecting plate 5 is further provided with a first through hole 51, one end of which can be in communication with the other end of the front cover inner air supplement channel 41, and the other end of the first through hole 51 is in communication with the first air supplement port 23. The present application can also realize the effect and effect of air supplement by arranging the first through hole in the inside of the connecting plate to guide the front cover inner air supplement channel in the front cover to the first air supplement port on the first static disc, and also effectively ensures the sealing effect.

[0060] In some embodiments, the other end of the front cover inner air supplementing passage 41 is provided with a first valve sheet 42 and a first valve sheet baffle 43; the front cover 4 and the connecting plate 5 are further provided with a sealing structure 6; the connecting plate 5 comprises a connecting body 52 and a first protruding part 53, the connecting body 52 is a plate structure and is connected with the sealing structure 6, the first protruding part 53 is provided on the end surface of the connecting body 52 towards the first static disc 25 and protrudes outward, the first static disc 25 is provided with a first recess 27, the first protruding part 53 is inserted and matched with the first recess 27, one end of the first air supplementing port 23 is communicated with the first compression cavity or the second compression cavity, and the other end is communicated with the first through hole 51 through the first recess 27. The first valve sheet and the first valve sheet baffle arranged at the front cover inner air supplementing passage can control the air discharged from the front cover inner air supplementing passage, effectively prevent the air in the first static disc from flowing back to the front cover inner air supplementing passage and affecting the compression performance, the sealing structure arranged between the front cover and the connecting plate can effectively ensure the sealing effect between the gas outlet end of the front cover inner air supplementing passage and the connecting plate, prevent the air supplementing gas from leaking from the gap, and thus ensure the air supplementing effect, and the first protruding part arranged on the connecting body and the first recess on the first static disc can realize the effective connection between the connecting plate and the first static disc through the concave-convex matching structure and ensure the normal and effective air supplementing process.

[0061] In some embodiments, the first static disc 25 is further provided with a second air supplementing port 24, the second air supplementing port 24 can also introduce air from the outside of the compressor to supplement the first pump body 2, the second air supplementing port 24 is at least two, at least one of which is arranged at a position communicated with the first compression cavity, and at least one of which is arranged at a position communicated with the second compression cavity. The second air supplementing port arranged on the first pump body can introduce refrigerant gas from the outside of the compressor, further improve the air supplementing amount of the first pump body, especially improve the suction mass flow of the low-temperature heat pump operation, improve the refrigeration / heating capacity, and further improve the efficiency and reliability of the compressor.

[0062] The application provides a double-air-supplementing scroll compressor structure.

[0063] 1. Two modes of air supplementing from inside and outside are realized by arranging two pairs of air supplementing holes on the static disc;

[0064] 2. The effective medium-pressure compression mechanism is adopted to realize effective compression and pressure supplementing of the suction air;

[0065] 3. The air supplementing control is realized by arranging the air supplementing passage and the adjusting mechanism matched with the double-air-supplementing static disc.

[0066] The application provides a double-gas-supplementing scroll compressor, which is realized by a double-gas-supplementing static disc, a middle-pressure compression structure and a gas-supplementing channel.

[0067] As shown in Figure 3 , 4 , the main static disc is provided with two pairs of inner and outer gas-supplementing holes; and mounting holes are arranged at the positions of the gas-supplementing holes; the suction-side refrigerant can pass through the through holes (not shown) to reach the suction-side of the main driving static disc, and the main driving static disc completes initial suction before gas supplementing.

[0068] In some embodiments, when the gas-supplementing compressor further comprises a front cover 4, the inside of the front cover 4 is further provided with a front-cover-outer-gas-supplementing channel 44, one end of the front-cover-outer-gas-supplementing channel 44 can introduce gas from the outside of the compressor, and the other end can communicate with the second gas-supplementing port 24; the other end of the front-cover-outer-gas-supplementing channel 44 is provided with a second valve piece 45 and a second valve-piece baffle 46. The front-cover-outer-gas-supplementing channel formed on the front cover can introduce gas from the outside of the compressor and conduct the gas into the compression cavity of the first pump body, realize the outer gas supplementing effect of the first pump body through the second gas-supplementing port, and the outer gas supplementing and the inner gas supplementing together further improve the gas-supplementing effect of the first pump body, increase the suction capacity, and improve the compression efficiency.

[0069] In some embodiments, when the gas-supplementing compressor further comprises a connecting plate 5, the inside of the connecting plate 5 is further provided with a second through hole 54, one end of the second through hole 54 can communicate with the other end of the front-cover-outer-gas-supplementing channel 44, and the other end of the second through hole 54 communicates with the second gas-supplementing port 24. The second through hole formed on the connecting plate can communicate with the front-cover-outer-gas-supplementing channel to realize the outer gas supplementing effect of the second gas-supplementing port.

[0070] In some embodiments, when the connecting plate 5 comprises a connecting body 52, the connecting plate 5 further comprises a second protruding part 55, the second protruding part 55 is arranged on the end face of the connecting body 52 towards the first static disc 25 and protrudes outward, the first static disc 25 is provided with a second groove 28, the second protruding part 55 is inserted and matched with the second groove 28, one end of the second gas-supplementing port 24 communicates with the first compression cavity or the second compression cavity, and the other end communicates with the second through hole 54 through the second groove 28. The second protruding part arranged on the connecting body and the second groove on the first static disc can realize the effective connection between the connecting plate and the first static disc through the concave-convex matching structure, and ensure that the outer gas supplementing process is normally and effectively carried out.

[0071] As shown in Figures 4-8As shown, the two pairs of air supplementing holes are connected by air supplementing connecting plates, a through hole is formed on the cylinder of the air supplementing connecting plate to realize the communication with the air supplementing holes of the static disc, the cylinder of the air supplementing connecting plate is sleeved on the static disc mounting hole, and an air supplementing sealing ring is arranged therebetween to realize the sealing of the two; the air supplementing connecting plate is cooperatively mounted with the front cover, a sealing gasket is arranged between the front cover and the air supplementing connecting plate, and the sealing connection is realized through the sealing gasket or the sealing ring; the front cover is provided with two air supplementing channels which are separated from each other; a one-way valve assembly is arranged at the outlet of the air supplementing channel, the one-way valve assembly is composed of a valve plate, a baffle and a screw, and the one-way valve assembly can also be realized by directly installing a one-way valve element; the one-way valve assembly can prevent the backflow of the compressed cavity gas to the air supplementing channel; and the above parts are assembled together to form a front cover assembly.

[0072] The inner air supplementing channel of the front cover is communicated with the inner air supplementing channel formed in the shell, and then communicated with the medium-pressure compression mechanism to realize the transmission of the inner air supplementing.

[0073] The inner air supplementing of the present application refers to that the suction refrigerant is compressed into medium-pressure gas by the medium-pressure compression mechanism, and then transported into the active static disc compression cavity through the channel arranged in the shell; the outer air supplementing refers to that the refrigerant which is introduced and throttled from the condenser is transported into the active static disc compression cavity through the arranged outer air supplementing channel.

[0074] In some embodiments, the second pump body 3 comprises a second static disc 33, a second dynamic disc 34 and a second static disc cover plate 35, the second exhaust port 32 is arranged on the second static disc 33, the medium-pressure exhaust cavity 36 is surrounded between the second static disc cover plate 35 and the second static disc 33, the second static disc 33 is further provided with a second static disc inner air supplementing channel 37, one end of the medium-pressure exhaust cavity 36 is communicated with the second exhaust port 32, the other end is communicated with one end of the second static disc inner air supplementing channel 37, and the other end of the second static disc inner air supplementing channel 37 is communicated with one end of the shell inner air supplementing channel 11. This is the preferred structure form of the embodiment 1 of the second pump body of the present application, that is, the compression of the gas is realized by the cooperation of the second static disc and the dynamic disc, and the sound attenuation effect can be realized through the medium-pressure exhaust cavity, and then the gas compressed by the second pump body can effectively supplement the first pump body through the inner air supplementing channels of the shell and the front cover, the suction amount of the first pump body is improved, and the compression refrigeration efficiency is improved.

[0075] As Figure 9As shown, the medium-pressure compression structure of the first embodiment is realized by a second driving plate and a second static plate, a plurality of scroll teeth are arranged on the part of the driving plate and the static plate, and the scroll teeth are a segment of the selected and corrected initial segment; the second driving plate and the second static plate can form a plurality of compression cavities, and the second static plate is provided with an exhaust valve plate corresponding to the exhaust port of each compression cavity to realize the suction compression and exhaust of the refrigerant; the second static plate cover and the second static plate cooperate to form a medium-pressure closed exhaust cavity, and the gas in the medium-pressure exhaust cavity flows to the main driving plate compression cavity through the air supplement channel, thereby realizing the internal air supplement of the main driving plate compression cavity; a medium-pressure pressure relief valve (not shown) is arranged in the medium-pressure exhaust cavity, and when the medium-pressure is too large, the medium-pressure is relieved to the suction side of the compressor; through the design of the size of the second driving plate and the static plate and the scroll teeth, the air supplement amount in a wide range can be set.

[0076] In some embodiments, a crankshaft 7 is further included, the first pump body 2 and the second pump body 3 are both driven by the crankshaft 7, and the first driving plate 26 and the second driving plate 34 are both sleeved on the crankshaft 7 and can be driven to rotate by the crankshaft 7.

[0077] The second exhaust port 32 is provided with a second exhaust valve plate 38 and a second exhaust baffle 39, and the first exhaust port 22 is provided with a first exhaust valve plate 29 and a first exhaust baffle 210.

[0078] The application further comprises that the second pump body is a structure that is both sleeved on the crankshaft, so that the first and second pump bodies can be driven by one crankshaft to perform compression, further saving components, reducing space, making the structure more compact, and improving the suction amount of the compressor and the refrigeration / heating efficiency of the compressor.

[0079] In some embodiments, the second static plate 33 comprises a plurality of second static plate scroll teeth 331, the second driving plate 34 comprises a plurality of second driving plate scroll teeth 341, the second static plate scroll teeth 331 correspond to the second driving plate scroll teeth 341 one by one to form a plurality of third compression cavities, and the second exhaust port 32 also has a plurality of second exhaust ports 32, each of the third compression cavities is provided with one of the second exhaust ports 32 one by one. This is a further preferred structure form of the second static plate and the second driving plate of the application, and through the one-to-one cooperation of the plurality of second static plate scroll teeth and the plurality of second driving plate scroll teeth, a plurality of third compression cavities can be formed, thereby further improving the compression amount, the air supplement effect of the first pump body, and the suction amount of the first pump body.

[0080] In some embodiments, the second pump body 3 comprises a centrifugal turbine 310, an upper cover plate 311, and a lower support structure 312, the centrifugal turbine 310 is arranged between the upper cover plate 311 and the lower support structure 312, the air supplementing compressor further comprises a crankshaft 7, the first moving plate 26 and the centrifugal turbine 310 are sleeved on the crankshaft 7 and can be driven to rotate by the crankshaft 7 to perform compression, the second suction port 31 is arranged on the lower support structure 312 and air is sucked in the axial direction, and the second exhaust port 32 is located on the radial outside of the centrifugal turbine 310 and on the lower support structure 312 and air is exhausted in the radial direction. This is the preferred structural form of the second embodiment of the present application. The structure of the centrifugal turbine can also compress the gas, so that the compressed gas is supplemented to the first pump body, the suction amount of the first pump body is greatly increased, the compression refrigerating capacity of the compressor is increased, and the compression refrigeration efficiency is improved.

[0081] As shown in Figures 10-12 The medium-pressure compression mechanism can also be provided with a centrifugal turbine structure to realize the pressure boosting and air supplementing of the suction air. The medium-pressure compression mechanism is provided with a lower support, a centrifugal turbine, and an upper cover plate. The upper cover plate, the centrifugal turbine, and the lower support form a relatively sealed space after assembly. The lower support is provided with an air inlet, and the refrigerant enters the centrifugal turbine through the air inlet, is accelerated by the turbine, and is thrown out to realize pressure boosting. The thrown-out refrigerant flows to the driving vane through the air supplementing channel to supplement the air to the driving vane compression chamber, so that the pressure boosting and air supplementing are realized.

[0082] The present application also provides an air conditioner comprising the air supplementing compressor of any one of the preceding embodiments.

[0083] The present application is to supplement the air to the driving vane compression chamber while keeping the suction air of the driving vane. The second driving vane can realize the effective compression and pressure boosting of the suction air and supplement the air to the driving vane compression chamber, so that the suction mass flow is increased. Therefore, the compressor can operate at a higher efficiency, the compression chamber pressure of the driving vane in the initial stage is increased, the compression ratio is reduced, the under-compression of the driving vane is improved, and the efficiency and reliability of the compressor are further improved.

[0084] Compared with the two-stage compressor that completely supplements the air from the throttling of the condenser, the present application can improve the suction mass flow in a larger range by using a relatively simplified and small structure, and the air supplementing refrigerant is derived from the evaporator (i.e., the suction chamber of the compressor), so that the refrigerating capacity is more effectively improved.

[0085] Compared with the traditional one-piece two-stage compressor, the present application can improve the suction mass flow in a relatively small size space and can reduce the compression ratio to a certain extent, so that the compressor has better adaptability in the case of a large refrigerating / heating capacity demand.

[0086] In some embodiments, when the first pump body 2 comprises a first static disc 25, and a second air supplement port 24 is arranged on the first static disc 25, the air conditioner further comprises an evaporator, a condenser and a throttling device, and the second air supplement port 24 can introduce refrigerant gas from the condenser outlet. The application realizes the introduction of external air supplement and the effect of air supplement by the communication of the second air supplement port with the condenser outlet, can jointly act with the first air supplement (the air supplement of the second pump body to the first pump body), can further improve the air supplement amount of the first pump body, especially for the problem of low suction mass flow rate of the low-temperature heat pump operation, improves the suction mass flow rate of the low-temperature heat pump operation, improves the refrigeration / heating capacity, and further improves the efficiency and reliability of the compressor.

[0087] The application further provides a control method of the air conditioner.

[0088] The application further provides a control method of the air conditioner.

[0089] The application further provides a control method of the air conditioner.

[0090] The application further provides a control method of the air conditioner.

[0091] The application further provides a control method of the air conditioner.

[0092] The application further provides a control method of the air conditioner.

[0093] When the low-temperature heating condition, both the air supplement are opened, the heating capacity is generated from the exhaust flow of the driving and static disc. Obviously, the exhaust flow can be increased when the air supplement is supplied from the inside and outside, so both the air supplement are opened.

[0094] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application. The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for the ordinary skilled in the art, without departing from the technical principle of the present application, a number of improvements and variations can be made, and these improvements and variations shall be considered as the protection scope of the present application.

Claims

1. A charge air compressor characterized by: The utility model relates to a kind of air compressor, including: Shell (1), first pump body (2) and second pump body (3), the first pump body (2) and the second pump body (3) are arranged inside the shell (1), the inside of the shell (1) has suction chamber (10);First suction port (21), first exhaust port (22) and first air supplement port (23) are provided on the first pump body (2), second suction port (31) and second exhaust port (32) are provided on the second pump body (3), the first suction port (21) and the second suction port (31) are communicated with the suction chamber (10) to carry out suction;Second exhaust port (32) can be communicated with the first air supplement port (23), so that the gas after compression in the second pump body (3) can be supplemented into the first pump body (2) from the first air supplement port (23); It further includes front cover (4), the inside of the shell is provided with shell internal air supplement channel (11), the inside of the front cover (4) is provided with front cover internal air supplement channel (41), one end of the shell internal air supplement channel (11) can be communicated with the second exhaust port (32) of the second pump body (3), the other end is communicated with one end of the front cover internal air supplement channel (41), the other end of the front cover internal air supplement channel (41) can be communicated with the first air supplement port (23); The first pump body (2) includes first static disc (25) and first dynamic disc (26), the first air supplement port (23) is provided on the first static disc (25), the first dynamic disc (26) and the first static disc (25) form first compression chamber and second compression chamber, the first air supplement port (23) has at least 2, at least one first air supplement port (23) is arranged in the position communicated with the first compression chamber, at least one first air supplement port (23) is arranged in the position communicated with the second compression chamber; It further includes connecting plate (5), the connecting plate (5) is arranged between the front cover (4) and the first static disc (25), the inside of the connecting plate (5) is further provided with first through-hole (51), one end of the first through-hole (51) can be communicated with the other end of the front cover internal air supplement channel (41), the other end of the first through-hole (51) is communicated with the first air supplement port (23); A first valve piece (42) and a first valve piece baffle (43) are arranged at the other end of the air supplementing passage (41) in the front cover (4); a sealing structure (6) is further arranged between the front cover (4) and the connecting plate (5); the connecting plate (5) comprises a connecting body (52) and a first protruding part (53), the connecting body (52) is a plate structure and is connected with the sealing structure (6), the first protruding part (53) is arranged on the end surface of the connecting body (52) towards the first static disc (25) and protrudes outward, the first static disc (25) is provided with a first recess (27), the first protruding part (53) is inserted and matched with the first recess (27), one end of the first air supplementing port (23) is communicated with the first compression cavity or the second compression cavity, and the other end is communicated with the first through hole (51) through the first recess (27).

2. The air supplementing compressor according to claim 1, characterized in that: The first static disc (25) is further provided with a second air supplementing port (24), the second air supplementing port (24) can also introduce air from outside the compressor to supplement air for the first pump body (2), the second air supplementing port (24) is at least two, at least one of which is arranged at a position communicated with the first compression cavity, and at least one of which is arranged at a position communicated with the second compression cavity.

3. The air supplementing compressor according to claim 2, characterized in that: The inside of the front cover (4) is further provided with a front cover outer air supplementing passage (44), one end of the front cover outer air supplementing passage (44) can introduce air from outside the compressor, and the other end can be communicated with the second air supplementing port (24); the other end of the front cover outer air supplementing passage (44) is provided with a second valve piece (45) and a second valve piece baffle (46).

4. The air supplementing compressor according to claim 3, characterized in that: The inside of the connecting plate (5) is further provided with a second through hole (54), one end of the second through hole (54) can be communicated with the other end of the front cover outer air supplementing passage (44), and the other end of the second through hole (54) is communicated with the second air supplementing port (24).

5. The air supplementing compressor according to claim 4, characterized in that: The connecting plate (5) further comprises a second protruding part (55), the second protruding part (55) is arranged on the end surface of the connecting body (52) towards the first static disc (25) and protrudes outward, the first static disc (25) is provided with a second recess (28), the second protruding part (55) is inserted and matched with the second recess (28), one end of the second air supplementing port (24) is communicated with the first compression cavity or the second compression cavity, and the other end is communicated with the second through hole (54) through the second recess (28).

6. The air supplementing compressor according to any one of claims 1-5, characterized in that: The second pump body (3) comprises a second static disc (33), a second dynamic disc (34) and a second static disc cover plate (35), the second exhaust port (32) is arranged on the second static disc (33), the second static disc cover plate (35) and the second static disc (33) form a medium-pressure exhaust cavity (36) therebetween, the second static disc (33) is further provided with a second static disc internal air supplementing channel (37), one end of the medium-pressure exhaust cavity (36) is communicated with the second exhaust port (32), and the other end is communicated with one end of the second static disc internal air supplementing channel (37), and the other end of the second static disc internal air supplementing channel (37) is communicated with one end of the shell internal air supplementing channel (11).

7. The air supplementing compressor according to claim 6, characterized in that: The crankshaft (7) is further provided, the first pump body (2) and the second pump body (3) are driven by the crankshaft (7), the first dynamic disc (26) and the second dynamic disc (34) are sleeved on the crankshaft (7) and can be driven to rotate by the crankshaft (7); The second exhaust port (32) is provided with a second exhaust valve (38) and a second exhaust baffle (39), and the first exhaust port (22) is provided with a first exhaust valve (29) and a first exhaust baffle (210).

8. The air supplementing compressor according to claim 6, characterized in that: The second static disc (33) comprises a plurality of second static disc scroll teeth (331), the second dynamic disc (34) comprises a plurality of second dynamic disc scroll teeth (341), the second static disc scroll teeth (331) and the second dynamic disc scroll teeth (341) are one-to-one corresponding and matched to form a plurality of third compression cavities, and the second exhaust port (32) also has a plurality of second exhaust ports (32), and each third compression cavity is provided with one second exhaust port (32) in one-to-one correspondence.

9. The air supplementing compressor according to claim 1, characterized in that: The second pump body (3) comprises a centrifugal turbine (310), an upper cover plate (311) and a lower support structure (312), the centrifugal turbine (310) is arranged between the upper cover plate (311) and the lower support structure (312), the air supplementing compressor further comprises a crankshaft (7), the first dynamic disc (26) and the centrifugal turbine (310) are sleeved on the crankshaft (7) and can be driven to rotate by the crankshaft (7) to perform compression, the second suction port (31) is arranged on the lower support structure (312) and air is sucked in along the axial direction, and the second exhaust port (32) is located on the radial outer side of the centrifugal turbine (310) and on the lower support structure (312) and exhausts along the radial direction.

10. An air conditioner characterized by comprising: The air supplementing compressor according to any one of claims 1-9.

11. The air conditioner of claim 10, wherein: When the second air supplementing port (24) is arranged on the first static disc (25), the air conditioner further comprises an evaporator, a condenser and a throttling device, and the second air supplementing port (24) can introduce refrigerant gas from the outlet of the condenser.

12. A control method for an air conditioner as defined in claim 11, characterized by: Comprising: A judging step of judging whether the operating condition is a normal operating condition or a low-temperature heating operating condition; The control step comprises: when the operation condition is a normal operation condition, only the first air supplement port is opened to supplement air to the first pump body, and the second air supplement port is closed, so that the single internal air supplement mode is run; when the operation condition is a low-temperature heating condition, the first air supplement port and the second air supplement port are simultaneously opened, so that the internal and external air supplement mode is run.

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