Abstract:
The invention discloses an expansion compressor apparatus and an air conditioner having the same, wherein the expansion compressor apparatus includes: an expansion cylinder, a compression cylinder, and a connecting shaft, an expansion cylinder air suction passage communicated with an air suction cavity of the expansion cylinder being provided on the expansion cylinder, the expansion compressor apparatus further includes: a control cylinder, the control cylinder being provided with a control cylinder air suction passage and a control cylinder air exhaust passage, both the control cylinder air suction passage and the control cylinder air exhaust passage being provided in a radial direction of the control cylinder, and a communication passage being provided between the control cylinder air exhaust passage and the expansion cylinder air suction passage. The apparatus effectively solves the problem in the prior art that a high-pressure fluid exerts an impact force in an axial direction on a fan-shaped cam.

Description:
TECHNICAL FIELD OF THE INVENTION 
       [0001]    The invention relates to the technical field of air conditioners, and in particular to an expansion compressor apparatus and an air conditioner having the same. 
       BACKGROUND OF THE INVENTION 
       [0002]    Currently, an expander and a compressor in an air conditioner are connected via a shaft, and the compressor is driven by means of power recovered from air expanded in the expander. 
         [0003]    In the prior art, fluid machinery includes the expander and the compressor, wherein the expander is provided with an expander suction hole and an expander exhaust hole, and the compressor is provided with a compressor suction hole and a compressor exhaust hole. When a refrigeration circulating apparatus is started, the fluid machinery without a drive apparatus can be reliably self-started only under the pressure of a working fluid. When the fluid machinery is in a working state, the expander suction hole and the compressor suction hole are closed along with the rotation of the shaft. Specifically, during the closing period of the compressor suction hole, the expander suction hole is in an open state; and during the closing period of the expander suction hole, the compressor suction hole is in an open state and is not communicated with the compressor exhaust hole. 
         [0004]    Since the expander suction hole is provided at a bottom of a lower bearing and a high-pressure fluid fed from the bottom exerts an upward impact force on a fan-shaped cam of a crankshaft, the axial movement of the crankshaft is increased, thereby making an expansion compressor operate unstably. An expander air suction control mode has a potential safety hazard of low reliability, with the accumulation of operating time, the abrasion of a cam in the air suction control mode is increased, a clearance between an upper end surface of the cam and a lower end surface of an expansion cylinder is enlarged, and seal failure is caused accordingly, thereby making it unable to perform air suction control. The structure of the expander is relatively complicated, and the expander is difficult to process. 
       SUMMARY OF THE INVENTION 
       [0005]    The invention aims to provide an expansion compressor apparatus and an air conditioner having the same, which are intended to solve the problem in the prior art that a high-pressure fluid exerts an impact force in an axial direction on a fan-shaped cam. 
         [0006]    In order to achieve the aim, according to one aspect of the invention, an expansion compressor apparatus is provided, which comprising: an expansion cylinder, a compression cylinder, and a connecting shaft connecting the expansion cylinder and the compression cylinder. An expansion cylinder air suction passage communicated with an air suction cavity of the expansion cylinder being provided on the expansion cylinder, and the expansion cylinder air suction passage being provided in a radial direction of the expansion cylinder. The expansion compressor apparatus further comprising: a control cylinder. The connecting shaft passes through the control cylinder. and is provided in the control cylinder, the control cylinder being provided with a control cylinder air suction passage and a control cylinder air exhaust passage, both the control cylinder air suction passage and the control cylinder air exhaust passage being provided in a radial direction of the control cylinder, and a communication passage being provided between the control cylinder air exhaust passage and the expansion cylinder air suction passage. A communication groove being provided at a position, corresponding to the control cylinder, on the connecting shaft, and the communication groove rotating along with the connecting shaft to enable the control cylinder air suction passage and the control cylinder air exhaust passage to be communicated or separated. 
         [0007]    Furthermore, the expansion cylinder further comprising an expansion roller, the expansion roller is provided on an expansion eccentric portion of the connecting shaft in a sleeving manner, the expansion cylinder is provided with a first inner hole, the expansion roller eccentrically rotates in the first inner hole, an expansion cylinder air exhaust passage communicated with an air exhaust cavity of the expansion cylinder is provided on the expansion cylinder and is provided in the radial direction of the expansion cylinder, a sliding slot extending in the radial direction of the expansion cylinder is provided between the expansion cylinder air suction passage and the expansion cylinder air exhaust passage, an expansion sliding sheet is provided in the sliding slot and abuts against the expansion roller, and the air suction cavity of the expansion cylinder and the air exhaust cavity of the expansion cylinder are formed between the first inner hole and the expansion roller. 
         [0008]    Furthermore, an included angle between one side, in a width direction, of the expansion cylinder air suction passage and a length direction of the expansion sliding sheet is an expansion cylinder air suction front-edge angle β, and an included angle between the other side, in the width direction, of the expansion cylinder air suction passage and the length direction of the expansion sliding sheet is an expansion cylinder air suction rear-edge angle α. An included angle between one side, in a width direction, of the expansion cylinder air exhaust passage and the length direction of the expansion sliding sheet is an expansion cylinder air exhaust front-edge angle φ, and an included angle between the other side, in the width direction, of the expansion cylinder air exhaust passage and the length direction of the expansion sliding sheet is an expansion cylinder air exhaust rear-edge angle γ. An included angle between one side, away from the control cylinder air exhaust passage in a clockwise direction, of the control cylinder air suction passage and a central line of the expansion eccentric portion is δ. Wherein the expansion cylinder air suction front-edge angle β, the expansion cylinder air suction rear-edge angle α, the expansion cylinder air exhaust front-edge angle φ, the expansion cylinder air exhaust rear-edge angle γ and the included angle δ satisfy at least one of the following relations: β&gt;α; γ&gt;φ; and −90°≦δ≦90°. 
         [0009]    Furthermore, the control cylinder further comprises a concentric piston coaxial with the connecting shaft, the control cylinder is provided with a second inner hole, the concentric piston is provided rotatably in the second inner hole, and the communication groove is formed in the concentric piston. 
         [0010]    Furthermore, a clearance between an outer diameter of the concentric piston and an inner diameter of the second inner hole of the control cylinder is within a range of 0 to 0.1 mm. 
         [0011]    Furthermore, the clearance between the concentric piston and the second inner hole of the control cylinder is sealed by an oil film. 
         [0012]    Furthermore, the control cylinder is provided on one side, away from the compression cylinder, of the expansion cylinder. 
         [0013]    Furthermore, the communication groove is an arc-shaped groove extending in a circumferential direction of the connecting shaft. 
         [0014]    Furthermore, a radian angle formed by the arc-shaped groove is θ, θ being within a range of 0° to 360°−γ. 
         [0015]    According to another aspect of the invention, an air conditioner is provided, which has an expansion compressor apparatus. The expansion compressor apparatus is an above-mentioned expansion compressor apparatus. 
         [0016]    By means of the technical solutions of the invention, high-pressure air enters the control cylinder air suction passage, and since the communication groove rotates along with the connecting shaft, when the control cylinder air suction passage and the control cylinder air exhaust passage are communicated via the communication groove, the expansion cylinder starts to suck air. Specifically, the high-pressure air passes through the control cylinder air suction passage, the communication groove and the control cylinder air exhaust passage in sequence, and then enters the expansion cylinder air suction passage, and the expansion cylinder starts to suck air, namely an air suction process of the expansion cylinder is started. Since both the control cylinder air suction passage and the control cylinder air exhaust passage are provided in the radial direction of the control cylinder, when entering the control cylinder, the high-pressure air will not exert an axial impact on the expansion eccentric portion, so that the expansion compressor apparatus operates more stably, thereby improving the reliability of an air suction control mode of the expansion compressor apparatus. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0017]    The specification drawings forming a part of the invention are intended to provide further understanding of the invention. The schematic embodiments and descriptions of the invention are intended to explain the invention, and do not form improper limits to the invention. In the drawings: 
           [0018]      FIG. 1  shows a breakdown structure diagram of an expansion compressor apparatus according to an embodiment of the invention; 
           [0019]      FIG. 2  shows a longitudinal section diagram of an expansion compressor apparatus in  FIG. 1 ; 
           [0020]      FIG. 3  shows an A-A direction section diagram of an expansion compressor apparatus in  FIG. 2 ; 
           [0021]      FIG. 4  shows a B-B direction section diagram of an expansion compressor apparatus in  FIG. 2 ; and 
           [0022]      FIG. 5  shows a partial structure diagram of an expansion compressor apparatus in  FIG. 2 . 
       
    
    
       [0023]    The drawings include the following drawing marks: 
         [0024]      10 , expansion cylinder;  11 , expansion cylinder air suction passage;  12 , expansion roller;  13 , expansion cylinder air exhaust passage;  14 , sliding slot;  15 , expansion sliding sheet;  20 , compression cylinder;  21 , compression roller;  22 , compression sliding sheet;  30 , connecting shaft;  31 , arc-shaped groove;  32 , expansion eccentric portion;  40 , control cylinder;  41 , control cylinder air suction passage;  42 , control cylinder air exhaust passage;  43 , concentric piston;  50 , partition plate;  60 , upper flange;  70 , lower flange; and  80 , end cover plate. 
       DETAILED DESCRIPTION OF THE EMBODIMENTS 
       [0025]    It is important to note that the embodiments of the invention and the characteristics in the embodiments can be combined under the condition of no conflicts. The invention is described below with reference to the drawings and the embodiments in detail. 
         [0026]    As shown in  FIG. 1  to  FIG. 4 , an expansion compressor apparatus according to an embodiment comprises an expansion cylinder  10 , a compression cylinder  20 , a connecting shaft  30  and a control cylinder  40 . The connecting shaft  30  connects the expansion cylinder  10  and the compression cylinder  20 , an expansion cylinder air suction passage  11  communicated with an air suction cavity of the expansion cylinder  10  is provided on the expansion cylinder  10  and is provided in a radial direction of the expansion cylinder  10 , the connecting shaft  30  passes through the control cylinder  40 , and is provided in the control cylinder  40 , the control cylinder  40  is provided with a control cylinder air suction passage  41  and a control cylinder air exhaust passage  42 , both the control cylinder air suction passage  41  and the control cylinder air exhaust passage  42  are provided in a radial direction of the control cylinder  40 , a communication passage is provided between the control cylinder air exhaust passage  42  and the expansion cylinder air suction passage  11 , the connecting shaft  30  passes through the control cylinder  40 , and is provided in the control cylinder  40 , a communication groove is provided at a position, corresponding to the control cylinder  40 , on the connecting shaft  30 , and the communication groove rotates along with the connecting shaft  30  to enable the control cylinder air suction passage  41  and the control cylinder air exhaust passage  42  to be communicated or separated. 
         [0027]    By means of the expansion compressor apparatus according to the embodiment, high-pressure air enters the control cylinder air suction passage  41 , and since the communication groove rotates along with the connecting shaft  30 , when the control cylinder air suction passage  41  and the control cylinder air exhaust passage  42  are communicated via the communication groove, the expansion cylinder  10  starts to suck air. Specifically, the high-pressure air passes through the control cylinder air suction passage  41 , the communication groove and the control cylinder air exhaust passage  42  in sequence, and then enters the expansion cylinder air suction passage  11 , and the expansion cylinder  10  starts to suck air, namely an air suction process of the expansion cylinder  10  is started. Since both the control cylinder air suction passage  41  and the control cylinder air exhaust passage  42  are provided in the radial direction of the control cylinder  40 , when entering the control cylinder  40 , the high-pressure air will not exert an axial impact on the expansion eccentric portion  32 , so that the expansion compressor apparatus operates more stably, thereby improving the reliability of an air suction control mode of the expansion compressor apparatus. 
         [0028]    In the embodiment, the expansion cylinder  10  further comprises an expansion roller  12 , the expansion roller  12  is provided on an expansion eccentric portion  32  of the connecting shaft  30  in a sleeving manner, the expansion cylinder  10  is provided with a first inner hole, the expansion roller  12  eccentrically rotates in the first inner hole, an expansion cylinder air exhaust passage  13  communicated with an air exhaust cavity of the expansion cylinder  10  is provided on the expansion cylinder  10  and is provided in the radial direction of the expansion cylinder  10 , a sliding slot  14  extending in the radial direction of the expansion cylinder  10  is provided between the expansion cylinder air suction passage  11  and the expansion cylinder air exhaust passage  13 , an expansion sliding sheet  15  is provided in the sliding slot  14  and abuts against the expansion roller  12 , and the air suction cavity of the expansion cylinder  10  and the air exhaust cavity of the expansion cylinder  10  are formed between the first inner hole and the expansion roller  12 . As shown in  FIG. 5 , an expansion eccentricity of the expansion eccentric portion  32  deviating from a concentric piston  43  is e. 
         [0029]    A working process of the expansion cylinder  10  is as follows. 
         [0030]    The high-pressure air enters the control cylinder air suction passage  41 , and since the communication groove rotates along with the connecting shaft  30 , when the control cylinder air suction passage  41  and the control cylinder air exhaust passage  42  are communicated, after the expansion roller  12  turns for an expansion cylinder air suction front-edge angle β, the high-pressure air passes through the control cylinder air suction passage  41 , the communication groove and the control cylinder air exhaust passage  42  in sequence, and then enters the expansion cylinder air suction passage  11 , and the expansion cylinder  10  starts to suck air, namely the air suction process of the expansion cylinder  10  is started. One end, reaching the control cylinder air suction passage  41  firstly, of the communication groove rotating along with the connecting shaft  30  is a head end. When a tail end of the communication groove departs from the control cylinder air suction passage  41 , the air suction process of the expansion cylinder  10  is ended, and at this time, the expansion cylinder  10  starts to expand. When the expansion roller  12  turns for an expansion cylinder air exhaust rear-edge angle γ, the expansion of the expansion cylinder  10  is ended, and the expansion cylinder air exhaust passage  13  starts to exhaust the air. When the expansion roller  12  turns for 720°−γ, the air exhaust of the expansion cylinder  10  is ended. 
         [0031]    In the embodiment, an included angle between one side, in a width direction, of the expansion cylinder air suction passage  11  and a length direction of the expansion sliding sheet  15  is the expansion cylinder air suction front-edge angle β, and an included angle between the other side, in the width direction, of the expansion cylinder air suction passage  11  and the length direction of the expansion sliding sheet  15  is an expansion cylinder air suction rear-edge angle α. An included angle between one side, in a width direction, of the expansion cylinder air exhaust passage  13  and the length direction of the expansion sliding sheet  15  is an expansion cylinder air exhaust front-edge angle φ, and an included angle between the other side, in the width direction, of the expansion cylinder air exhaust passage  13  and the length direction of the expansion sliding sheet  15  is the expansion cylinder air exhaust rear-edge angle γ. An included angle between one side, away from the control cylinder air exhaust passage  42  in a clockwise direction, of the control cylinder air suction passage  41  and a central line of the expansion eccentric portion  32  is δ. The expansion cylinder air suction front-edge angle β, the expansion cylinder air suction rear-edge angle α, the expansion cylinder air exhaust front-edge angle φ, the expansion cylinder air exhaust rear-edge angle γ and the included angle δ satisfy at least one of the following relations: β&gt;α; γ&gt;φ; and −90°≦δ≦90°. In order to prevent expansions insufficiency, an air suction capacity of the expansion cylinder  10  is ensured, namely an expansion ratio of the expansion cylinder  10  is ensured, and δ should be greater than or equal to −90° and should be less than or equal to 90°. 
         [0032]    In the embodiment, the control cylinder  40  further comprises the concentric piston  43  coaxial with the connecting shaft  30 , the control cylinder  40  is provided with a second inner hole, the concentric piston  43  is provided rotatably in the second inner hole, and a clearance between an outer diameter of the concentric piston  43  and an inner diameter of the second inner hole of the control cylinder  40  is within a range of 0 to 0.1 mm. In the embodiment, the clearance between the outer diameter of the concentric piston  43  and the second inner hole of the control cylinder  40  is sealed by an oil film. The oil film can prevent a phenomenon of movement of high-pressure air outside the concentric piston  43  between the control cylinder air suction passage  41  and the control cylinder air exhaust passage  42 , the phenomenon referring to a phenomenon of heat movement. The clearance between the outer diameter of the concentric piston  43  and the second inner hole of the control cylinder  40  is 0.015 mm. When the expansion compressor apparatus operates, the clearance is filled with refrigerant oil, thereby achieving a good seal effect. 
         [0033]    In the embodiment, the control cylinder  40  is provided on one side, away from the compression cylinder  20 , of the expansion cylinder  10 . The structure is simple, and mounting is convenient. 
         [0034]    In the embodiment, the compression cylinder  20  comprises a compression roller  21  and a compression sliding sheet  22 , the compression roller  21  is provided on the connecting shaft  30  in a penetration manner, the compression cylinder  20  is provided with a third inner hole matched with the compression roller  21  and the compression cylinder  20  is also provided with a second radial hole which accommodates the compression sliding sheet  22  and penetrates in a radial direction of the compression cylinder  20 , the compression sliding sheet  22  abuts against the compression roller  21 , and a compression cylinder air suction cavity and a compression cylinder suction cavity are formed between the third inner hole of the compression cylinder  20  and the compression roller  21 . 
         [0035]    In the embodiment, the expansion compressor apparatus further comprises a partition plate  50 , an upper flange  60 , a lower flange  70  and an end cover plate  80 , wherein the partition plate  50  is provided between the compression cylinder  20  and the expansion cylinder  10 ; the upper flange  60  is provided on one side, away from the expansion cylinder  10 , of the compression cylinder  20 ; the lower flange  70  is provided on one side, away from the compression cylinder  20 , of the control cylinder  40 ; and the end cover plate  80  is provided on one side, away from the expansion cylinder  10 , of the lower flange  70 . In the embodiment, the connecting shaft  30  is provided with a through hole which penetrates in an axial direction of the connecting shaft  30 . 
         [0036]    In the embodiment, the communication groove is an arc-shaped groove  31  extending in a circumferential direction of the connecting shaft  30 . Certainly, the communication groove may be of other shapes. In the embodiment, a radian angle formed by the arc-shaped groove  31  is θ, θ being within a range of 0° to 360°−γ. Air suction starting time and air suction ending time of the expansion cylinder  10  can be adjusted by adjusting θ, and the air suction capacity of the expansion cylinder  10  can be further adjusted, namely the expansion ratio of the expansion cylinder  10  can be adjusted. Preferably, θ is 120°, and δ is 43°. 
         [0037]    The invention also provides an air conditioner. An embodiment (unmarked in Figure) for the air condition in the embodiment has an expansion compressor apparatus. The expansion compressor apparatus is an above-mentioned expansion compressor apparatus. High-pressure air enters a control cylinder air suction passage  41 , and since a communication groove rotates along with a connecting shaft  30 , when the control cylinder air suction passage  41  and a control cylinder air exhaust passage  42  are communicated via the communication groove, an expansion cylinder  10  starts to suck air. Specifically, the high-pressure air passes through the control cylinder air suction passage  41 , the communication groove and the control cylinder air exhaust passage  42  in sequence, and then enters an expansion cylinder air suction passage  11 , and the expansion cylinder  10  starts to suck air, namely an air suction process of the expansion cylinder  10  is started. Since both the control cylinder air suction passage  41  and the control cylinder air exhaust passage  42  are provided in the radial direction of a control cylinder  40 , when entering the control cylinder  40 , the high-pressure air will not exert an axial impact on an expansion eccentric portion  32 , so that the expansion compressor apparatus operates more stably, thereby improving the reliability of an air suction control mode of the expansion compressor apparatus. 
         [0038]    The above is only the preferred embodiments of the invention, and is not intended to limit the invention. There can be various modifications and variations in the invention for those skilled in the art. Any modifications, equivalent replacements, improvements and the like within the spirit and principle of the invention shall fall within the protection scope of the invention.