High-energy-efficiency compact triangular circulating compressor

Abstract

The invention relates to a high-energy-efficiency compact type triangular circulating compressor which comprises a cylinder body. The controller is mounted on one side of the first end of the cylinder body; the rear cover is mounted on one side of the second end of the cylinder body; the container mechanism comprises a special-shaped cavity and a sealing plate, the wall face of the cylinder body is concaved inwards to form the special-shaped cavity, and the sealing plate is welded to the outside of the special-shaped cavity in a covering mode; the flow guide pipe is used for communicating the container mechanism with the rear cover and comprises a first spherical joint in sealed connection with the first reflux inlet of the container mechanism and a second spherical joint in sealed connection with the second reflux inlet of the rear cover; the functional element is mounted at the top of the cylinder body, and a preset gap is formed between the functional element and the top wall of the cylinder body. The container mechanism and the cylinder body are integrally designed, the container mechanism and the rear cover are flexibly connected through the flow guide pipe in ball joint, the total size and the installation difficulty are reduced, thermal isolation is achieved through overhead treatment of functional elements at the top of the cylinder body, and the energy efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to an energy-saving compressor, in particular to a high-energy-efficiency compact triangular cycle compressor. BACKGROUND

[0002] The description in this part only provides background information related to the present application disclosure, and does not constitute prior art.

[0003] In a pure electric vehicle, a hybrid vehicle and the like, the vehicle heat pump system realizes heat transfer by compressing the refrigerant by means of the compressor therein, and realizes heat exchange by means of the cooling liquid circuit, and then cools or heats the corresponding heat exchange unit. However, in an extremely cold vehicle operating environment, due to the low temperature, the temperature of the refrigerant flowing back to the suction port of the compressor is low, so that the temperature of the refrigerant discharged from the exhaust port of the compressor after being pressurized by the compressor may not meet the preset temperature line, thereby greatly affecting the heating function of the vehicle.

[0004] To solve this problem, there is a triangular cycle heat management system scheme, in which part of the refrigerant discharged from the exhaust port of the compressor can be directly introduced back to the suction port. However, this scheme has the following difficulties in physical layout. First, due to the introduction of the return line, the pipeline layout is complex, which increases the overall volume and significantly increases the installation and maintenance costs. Second, under the interlacing of multiple pipelines, the cold and hot zones are not obvious, and unnecessary heat exchange may exist between them, which limits the improvement of energy efficiency.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely describing the technical scheme of the present application, and for the convenience of understanding by those skilled in the art. The above technical scheme cannot be considered as known by those skilled in the art only because it is described in the background section of the present application. SUMMARY

[0006] The purpose of the present application is to provide a high-energy-efficiency compact triangular cycle compressor, which can reduce the overall volume and installation difficulty by integrally designing the container mechanism and the cylinder body, flexibly connecting the container mechanism and the rear cover through the ball joint guide pipe, and achieving thermal insulation by overhead processing of the functional elements on the top of the cylinder body, thereby improving the energy efficiency.

[0007] In order to achieve the above purpose, the present application discloses a high-energy-efficiency compact triangular cycle compressor, which comprises: a cylinder body, the cylinder body having a first end and a second end arranged oppositely; a controller, the controller being installed on one side of the first end of the cylinder body; a rear cover, the rear cover being installed on one side of the second end of the cylinder body; a container mechanism comprising a special-shaped cavity recessed in a wall surface of the cylinder body, and a welding cover arranged on an outer wall of the special-shaped cavity; a flow guide pipe for connecting the container mechanism and the back cover, the flow guide pipe comprising a first spherical joint sealingly connected with a first backflow port of the container mechanism, and a second spherical joint sealingly connected with a second backflow port of the back cover; at least one functional element connected with the cylinder body and / or the container mechanism, the functional element being installed on a top of the cylinder body, and a preset gap being provided between the functional element and a top wall of the cylinder body.

[0008] As a further description of the above technical solution, the functional element comprises a condenser and an evaporator, and the condenser and the evaporator are installed in parallel on the top of the cylinder body.

[0009] As a further description of the above technical solution, the functional element comprises a flow channel plate, the condenser comprises a condensing outlet, the evaporator comprises an evaporating inlet, the flow channel plate is installed on the cylinder body through fixing feet, the flow channel plate is configured to form a first flow channel, a second flow channel and a mounting port, a first end of the first flow channel is connected with the condensing outlet, a second end of the first flow channel and a first end of the second flow channel are connected with the mounting port, a second end of the second flow channel is connected with the evaporating inlet, and a first expansion valve is mounted at the mounting port; the flow channel plate is provided with a heat insulation groove penetrating between the first flow channel and the second flow channel.

[0010] As a further description of the above technical solution, the number of the fixing feet is set to be multiple, the multiple fixing feet are arranged at intervals on the top surface of the cylinder body, the flow channel plate is installed on the top surface of the cylinder body through the multiple fixing feet, and the fixing feet are arranged in an integrated structure with the cylinder body.

[0011] As a further description of the above technical solution, the heat insulation groove penetrates the flow channel plate in a vertical direction, and a horizontal projection of the heat insulation groove is set as a widthwise groove body winding in a meandering manner adjacent to a center line of the first flow channel and the second flow channel.

[0012] As a further description of the above technical solution, the wall surface of the container mechanism is provided with an air inlet leading to the inside of the cylinder body, a first backflow through hole connected with the back cover through the flow guide pipe, and an evaporating connecting port connected with an evaporating outlet of the evaporator, the first backflow through hole and the evaporating connecting port are arranged adjacent to each other, and the container mechanism is provided with a mixed flow baffle at a position facing the first backflow through hole and the evaporating connecting port.

[0013] As a further description of the above technical solution, the container mechanism is arranged on the side wall of the cylinder body between the controller and the rear cover.

[0014] As a further description of the above technical solution, the first backflow through hole and the evaporation connecting port are arranged adjacent to the top of the special-shaped cavity; the container mechanism comprises an intermediate plate arranged vertically at the intermediate position of the special-shaped cavity, so that the special-shaped cavity forms a U-shaped flow channel, the first backflow through hole and the evaporation connecting port are arranged at one end of the U-shaped flow channel, and the air inlet is arranged at the other end of the U-shaped flow channel.

[0015] As a further description of the above technical solution, the first backflow port is provided with a first annular groove protruding outward, the first spherical joint is snap-fitted in the first annular groove, and the outer wall of the first spherical joint is annular and fitted with the inner wall of the first annular groove; the second backflow port is provided with a second annular groove protruding outward, the second spherical joint is snap-fitted in the second annular groove, and the outer wall of the second spherical joint is annular and fitted with the inner wall of the second annular groove.

[0016] As a further description of the above technical solution, a pipe body is connected between the first spherical joint and the second spherical joint, and the flow guide pipe comprises a channel penetrating through the first spherical joint, the pipe body and the second spherical joint.

[0017] Through the above technical solution, the application has the following beneficial effects: The high-energy-efficiency compact triangular cycle compressor can reduce the overall volume and installation difficulty by integrally designing the container mechanism and the cylinder body, flexibly connecting the container mechanism and the rear cover through the spherical joint flow guide pipe, and achieving thermal isolation by overhanging the functional elements on the top of the cylinder body to improve energy efficiency. Specifically, the main body of the container mechanism in the application is integrally composed of the cylinder wall surface extension structure, which is directly formed in the casting stage, significantly reducing the installation difficulty and the overall volume. The two-section spherical joint flow guide pipe can be applied to various combinations of high and low lines, is easy to install, and has good sealing performance. The functional elements for heat exchange have high and low temperature partitions. Through the overhanging design, the gap between the functional elements and the cylinder body is reduced, and the energy efficiency is indirectly improved.

[0018] In order to further understand the features and technical contents of the application, please refer to the following detailed description and drawings of the application. However, the provided drawings are only used for reference and illustration, and are not used to limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments described in the present specification, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figures 1-4 is a cross-sectional view of a high-energy-efficiency compact triangular cycle compressor provided by the embodiments of the present specification; Figures 5-7 is a three-dimensional view of a high-energy-efficiency compact triangular cycle compressor provided by the embodiments of the present specification; Figure 8 is a guide pipe schematic view of a high-energy-efficiency compact triangular cycle compressor provided by the embodiments of the present specification; In the figure: 1, cylinder; 11, fixed foot; 2, controller; 3, container mechanism; 31, special-shaped cavity; 32, sealing plate; 33, air suction port; 34, first backflow port; 341, first annular groove; 3411, first backflow through hole; 35, evaporation connection port; 36, mixed flow baffle; 37, middle plate; 371, groove; 39, drainage plate; 4, rear cover; 41, second backflow port; 411, second annular groove; 4111, second backflow through hole; 5, guide pipe; 51, first spherical joint; 511, first mounting groove; 512, first rubber ring; 513, first section hole; 52, pipe body; 53, second spherical joint; 531, second mounting groove; 532, second rubber ring; 533, second section hole; 54, passage; 6, flow channel plate; 61, first flow channel; 62, second flow channel; 63, mounting port; 64, heat insulation groove; 66, preset gap; 7, first expansion valve; 8, condenser; 81, condensing outlet; 9, evaporator; 91, evaporation inlet; 92, evaporation outlet. DETAILED DESCRIPTION

[0021] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0022] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. Furthermore, the accompanying drawings of the present invention are for simple illustrative purposes only and are not depictions of actual dimensions; this is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of protection of the present invention.

[0023] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0024] Please see Figures 1-8 This embodiment describes a high-efficiency compact triangular cycle compressor, which includes: Cylinder body 1, the cylinder body 1 having a first end and a second end disposed opposite to each other; Controller 2, the controller 2 is installed on one side of the first end of the cylinder 1; Rear cover 4, the rear cover 4 is installed on one side of the second end of the cylinder body 1; The container mechanism 3 includes a shaped cavity 31 formed by the recess of the wall of the cylinder 1, and a sealing plate 32 welded to cover the shaped cavity 31. The guide tube 5 is used to connect the container mechanism 3 and the rear cover 4. The guide tube 5 includes a first spherical connector 51 that is sealed to the first return port 34 of the container mechanism 3, and a second spherical connector 53 that is sealed to the second return port 41 of the rear cover 4. At least one functional element is connected with the cylinder body 1 and / or the container mechanism 3, which is installed on the top of the cylinder body 1 and has a preset gap 66 between the top wall of the cylinder body 1.

[0025] Based on the above process of the application, the container mechanism 3 and the cylinder body 1 are designed in one body, the container mechanism 3 and the rear cover 4 are connected through the flexible flow guide pipe 5, the overall volume and installation difficulty are reduced, the heat insulation is realized through the overhead treatment of the functional element on the top of the cylinder body 1, and the energy efficiency is improved. Specifically, the main body of the container mechanism 3 in the application is integrally composed of the wall surface extension structure of the cylinder body 1, which is directly formed in the casting stage, which significantly reduces the installation difficulty and the overall volume, and the flow guide pipe 5 with the ball joint scheme can be applied to various combinations of high and low positions of the line, which is easy to install and has good sealing performance. The functional element for heat exchange has high and low temperature partitions, and through the overhead design, the gap between the functional element and the cylinder body 1 is reduced, and the energy efficiency is indirectly improved.

[0026] The above-mentioned functional element includes a condenser 8 and an evaporator 9, which are installed in parallel on the top of the cylinder body 1. The condenser 8 and the evaporator 9 can be respectively provided as a cuboid box type, which is installed on the top of the cylinder body 1 in the direction from the first end to the second end, which takes the cylinder body 1 as the bearing center, can realize better utilization of the top space of the compressor, and adopts the vertical plug-in mode to plug and install the bottom structures such as the cylinder body 1, the rear cover 4 and the flow channel plate 6.

[0027] Further, the functional element includes a flow channel plate 6, the condenser 8 includes a condensing outlet 81, the evaporator 9 includes an evaporation inlet 91, the flow channel plate 6 is installed on the cylinder body 1 through a fixing foot 11, the flow channel plate 6 is configured to form a first flow channel 61, a second flow channel 62 and a mounting port 63, a first end of the first flow channel 61 is connected with the condensing outlet 81, a second end of the first flow channel 61 and a first end of the second flow channel 62 are connected with the mounting port 63, a second end of the second flow channel 62 is connected with the evaporation inlet 91, and a first expansion valve 7 is installed at the mounting port 63; the flow channel plate 6 is provided with a heat insulation groove 64 penetrating between the first flow channel 61 and the second flow channel 62.

[0028] Based on the above process of the present application, in the installation, the flow channel plate 6 can be suspended and installed on the side wall of the cylinder body 1, or on the top position of the cylinder body 1. Specifically, it can be arranged adjacent to the placement position of the condenser 8 and the evaporator 9. Hereinafter, the condenser 8 and the evaporator 9 are installed on the top position of the cylinder body 1 as an example. The number of the fixing feet 11 is set to be multiple, and the multiple fixing feet 11 are arranged at intervals on the top surface of the cylinder body 1. The flow channel plate 6 is installed on the top surface of the cylinder body 1 through the multiple fixing feet 11. The fixing feet 11 can be provided as an installation structure protruding upward, which has a bolt hole. The flow channel plate 6 also has a corresponding hole position. After the flow channel plate 6 is installed on the top of the cylinder body 1, the respective hole positions correspond to each other, and are fixed by inserting the bolt of the fastener into the screw hole of the fixing foot 11. The protrusion of the fixing foot 11 itself can lift the bottom of the flow channel plate 6 and separate most of the flow channel plate 6 from the cylinder body 1, forming a heat-insulating fault. The fixing foot 11 and the cylinder body 1 are provided in an integrated structure, which can be directly formed during the casting of the cylinder body 1, and has high structural strength.

[0029] In the specific process of the heat insulation groove 64, the heat insulation groove 64 is arranged in the vertical direction through the flow channel plate 6, and the horizontal projection of the heat insulation groove 64 is arranged as an equal-width groove body that is adjacent to the midline of the first flow channel 61 and the second flow channel 62 and is coiled in a snake shape. Specifically, the heat insulation groove 64 can be milled by a vertical milling cutter along the profile path of the flow channel plate 6.

[0030] In the above scheme, the flow channel plate 6 connecting the high-temperature area and the low-temperature area is built, and the gap between the flow channel plate 6 and the cylinder body 1 is padded, and the heat insulation groove 64 between different flow channels is opened to achieve heat insulation, thereby improving the operating energy efficiency of the compressor. Specifically, the air entering the pre-set gap 66 between the flow channel plate 6 and the cylinder body 1 reduces the heat transfer from the cylinder body 1 to the flow channel plate 6, and the air in the heat insulation groove 64 designed in the middle position of the first flow channel 61 and the second flow channel 62 reduces the heat transfer between the first flow channel 61 and the second flow channel 62, thereby avoiding heat loss and significantly improving the energy efficiency of the product.

[0031] In the process of the container mechanism 3 in the present scheme, the wall surface of the container mechanism 3 is provided with an air suction port 33 leading to the inside of the cylinder body 1, a first backflow through hole 3411 connected with the back cover 4 through the flow guide pipe 5, and an evaporation connection port 35 connected with the evaporation outlet 92 of the evaporator 9. The first backflow through hole 3411 and the evaporation connection port 35 are arranged adjacent to each other. The container mechanism 3 is provided with a mixed flow baffle 36 at a position facing the first backflow through hole 3411 and the evaporation connection port 35.

[0032] Based on the above process of the present application, in the actual structure, the cylinder body 1 and the container mechanism 3 are integrally formed between the plurality of protruding wall surfaces forming the special-shaped cavity 31, the plurality of protruding wall surfaces form the special-shaped cavity 31 and the corresponding flow channel, and are welded on the top end surface of the protruding wall surface from the outside to the inside by means of the sealing plate 32, so that the special-shaped cavity 31 forms a closed structure, and the welding method can consider brazing, and is welded in a surface-to-surface connection manner with the aid of flux.

[0033] Specifically in use, the rear cover 4 side discharges part of the high-temperature and high-pressure refrigerant through the exhaust port into the flow guide pipe 5, and finally enters the special-shaped cavity 31 through the first reflux through hole 3411, and impacts on the position of the mixed flow baffle 36, which is the air supplement of the triangular circulation structure. At the same time, the evaporator 8 side discharges the low-temperature and low-pressure refrigerant from the evaporator outlet 92 side into the special-shaped cavity 31, and also impacts on the position of the mixed flow baffle 36. After the impact, the refrigerants at the two places are fully mixed and flow to the position of the suction port 33 in the downstream direction, and return from the special-shaped cavity 31 to the inside of the cylinder body 1.

[0034] That is, in the scheme of the present application, the overall volume can be reduced by the integrally formed special-shaped cavity 31, and the mixed flow baffle 36 therein realizes sufficient mixing of the triangular reflux, and the compressor has high thermal efficiency. The flow channel formed in the wall surface of the cylinder body 1 and the surrounding baffle constitute the corresponding special-shaped cavity 31, so that the container mechanism 3 part is integrally arranged with the cylinder body 1, has higher strength, occupies smaller space, and bears the function of gas-liquid mixing, significantly reduces the overall volume of the compressor, and the structure for mixing plays a rapid mixing effect on the refrigerant on the rear cover 4 side and the evaporator 9 side through the similar integrally designed mixed flow baffle 36, also has the characteristics of simple structure and small volume, can be formed together with the special-shaped cavity 31, and the process is simple.

[0035] In the embodiment, the container mechanism 3 is arranged on the side wall of the cylinder body 1 between the controller 2 and the rear cover 4. The first reflux through hole 3411 and the evaporation connection port 35 are arranged at a position adjacent to the top of the special-shaped cavity 31; the container mechanism 3 includes an intermediate plate 37 vertically arranged at an intermediate position of the special-shaped cavity 31, so that the special-shaped cavity 31 forms a U-shaped flow channel, the first reflux through hole 3411 and the evaporation connection port 35 are arranged at one end of the U-shaped flow channel, and the suction port 33 is arranged at the other end of the U-shaped flow channel. The top of the intermediate plate 37 is connected with the edge of the special-shaped cavity 31, and the bottom of the intermediate plate 37 has a gap with the edge of the special-shaped cavity 31, so that the U-shaped flow channel is placed in a positive direction, the upper right corner position is the mixed flow area of the mixed flow baffle 36, the upper left corner position is the position of the suction port 33 of the cylinder body 1, the entire U-shaped flow channel is fully utilized, has good buffering effect and space utilization rate.

[0036] In the process of constructing the guide pipe 5, the first return port 34 is provided with a protruding first annular groove 341, and the first spherical connector 51 is snapped into the first annular groove 341, with the outer wall of the first spherical connector 51 being annular and fitting against the inner wall of the first annular groove 341; the second return port 41 is provided with a protruding second annular groove 411, and the second spherical connector 53 is snapped into the second annular groove 411, with the outer wall of the second spherical connector 53 being annular and fitting against the inner wall of the second annular groove 411. A pipe body 52 connects the first spherical connector 51 and the second spherical connector 53, and the guide pipe 5 includes a channel 54 that passes through the first spherical connector 51, the pipe body 52, and the second spherical connector 53.

[0037] Based on the above-described process of the present invention, during installation, the controller 2 and the rear cover 4 are respectively installed on both sides of the cylinder body 1. In fact, in some embodiments, in order to facilitate the setting of an oil tank for oil return on the cylinder body 1, a front cover may also be included between the cylinder body 1 and the rear cover 4. The first spherical connector 51 is installed inside the first annular groove 341 in the first return port 34 in a spherical insertion manner. The inner diameter of the first annular groove 341 and the outer diameter of the first spherical connector 51 match, so that they are in contact with each other and actually achieve a sealing effect. Due to the geometric relationship between the spherical and cylindrical inner cavities, even if the first spherical connector 51 rotates relative to the first annular groove 341 in the first return port 34 due to the installation angle, the outer wall of the first annular groove 341 and the inner wall of the first spherical connector 51 can always be in contact, and the sealing effect can always be guaranteed. The same applies to the second spherical connector 53.

[0038] In practical use, part of the refrigerant from the compressor's exhaust port enters the condenser, while the other part enters the second spherical connector 53 of the guide pipe 5 from the second return port 41 of the rear cover 4. It then flows through the pipe body 52 from the channel 54 to the first spherical connector 51, and finally enters the first annular groove 341 of the first return port 34, then enters the container mechanism 3, and finally enters the compressor's suction port, thus achieving triangular circulation refrigerant replenishment. In this invention, the spherical connectors on both sides of the guide pipe 5 can be plugged into the corresponding return ports on the container mechanism 3 or the rear cover 4. This connection is not affected by the position or height of the return port, making it more flexible and stable, and avoiding accidental loosening of the interface due to vibration during vehicle operation. Specifically, even if there is a height difference between the return ports of the container mechanism 3 and the rear cover 4, the corresponding spherical connectors can still achieve a sealed connection with the return port by plugging in, utilizing the characteristics of the spherical structure, offering high flexibility. In other words, the horizontal heights of the first annular groove 341 and the second annular groove 411 can be misaligned, so that flexible communication can be achieved even when the tube body 52 is not parallel to the horizontal plane.

[0039] To enhance the sealing effect, specifically, the outer wall of the first ball joint 51 is provided with a first mounting groove 511, in which a first rubber ring 512 is installed. The first rubber ring 512 protrudes outside the first mounting groove 511, and the outer wall of the first rubber ring 512 is in contact with the inner wall of the first annular groove 341. The outer wall of the second ball joint 53 is provided with a second mounting groove 531, in which a second rubber ring 532 is installed. The second rubber ring 532 protrudes outside the second mounting groove 531, and the outer wall of the second rubber ring 532 is in contact with the inner wall of the second annular groove 411. Taking the first spherical connector 51 as an example, the first mounting groove 511 is configured as an annular groove surrounding the first spherical connector 51. The first rubber ring 512 is configured as an O-ring that matches the annular groove and is fitted inside the first mounting groove 511. The depth of the first mounting groove 511 is slightly smaller than the diameter of the first rubber ring 512, so that at least part of the first rubber ring 512 protrudes and elastically presses against the inner wall of the first annular groove 341, forming a better sealing effect. In another embodiment, to enhance the sealing effect, the first spherical connector 51 and / or the second spherical connector 53 are made of elastic material, so that the first spherical connector 51 and / or the second spherical connector 53 avoid elastic contact with their corresponding counterparts, thereby increasing the sealing area.

[0040] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention specification and drawings are included in the scope of the patent application of the present invention.

[0041] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0042] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A high-efficiency compact triangular cycle compressor, characterized by, The high-energy-efficient compact triangular cycle compressor comprises: a cylinder body having a first end and a second end arranged oppositely; a controller installed on one side of the first end of the cylinder body; a rear cover installed on one side of the second end of the cylinder body; a container mechanism comprising a special-shaped cavity formed by recessing a wall surface of the cylinder body, and a sealing cover arranged outside the special-shaped cavity; a flow guide pipe for connecting the container mechanism and the rear cover, the flow guide pipe comprising a first spherical joint sealingly connected with a first backflow port of the container mechanism, and a second spherical joint sealingly connected with a second backflow port of the rear cover; at least one functional element connected with the cylinder body and / or the container mechanism, the functional element being installed on the top of the cylinder body and having a preset gap between the functional element and the top wall of the cylinder body.

2. The high-efficiency compact-capacity triangular cycle compressor according to claim 1, characterized by: The functional element comprises a condenser and an evaporator, and the condenser and the evaporator are installed in parallel on the top of the cylinder body.

3. The high-efficiency compact-capacity triangular cycle compressor according to claim 2, characterized by: The functional element comprises a flow channel plate, the condenser comprises a condensing outlet, the evaporator comprises an evaporating inlet, the flow channel plate is installed on the cylinder body through fixing feet, the flow channel plate is configured to form a first flow channel, a second flow channel and a mounting port, a first end of the first flow channel is connected with the condensing outlet, a second end of the first flow channel and a first end of the second flow channel are connected with the mounting port, a second end of the second flow channel is connected with the evaporating inlet, and a first expansion valve is mounted at the mounting port; the flow channel plate is provided with a heat insulation groove penetrating between the first flow channel and the second flow channel.

4. The high-efficiency compact-capacity triangular cycle compressor according to claim 3, characterized by: The number of the fixing feet is set to be multiple, the multiple fixing feet are arranged at intervals on the top surface of the cylinder body, the flow channel plate is installed on the top surface of the cylinder body through the multiple fixing feet, and the fixing feet are arranged in an integrated structure with the cylinder body.

5. The high efficiency compact-capacity triangular cycle compressor according to claim 3, characterized in that: The heat insulation groove penetrates the flow channel plate in a vertical direction, and a horizontal projection of the heat insulation groove is arranged as a widthwise groove body winding in a meandering manner adjacent to the midlines of the first flow channel and the second flow channel.

6. The high efficiency compact-capacity triangular cycle compressor according to claim 2, characterized in that: The wall surface of the container mechanism is provided with an air inlet leading to the inside of the cylinder body, a first backflow through hole connected with the rear cover through the flow guide pipe, and an evaporating connecting port connected with an evaporating outlet of the evaporator, the first backflow through hole and the evaporating connecting port are arranged adjacently, and the container mechanism is provided with a mixed flow baffle at a position facing the first backflow through hole and the evaporating connecting port.

7. The high efficiency compact-capacity triangular cycle compressor according to claim 6, characterized in that: The container mechanism is arranged on the side wall of the cylinder body between the controller and the rear cover.

8. The high-efficiency compact-capacity triangular cycle compressor according to claim 7, characterized by: The first backflow through hole and the evaporating connecting port are arranged at a position adjacent to the top of the special-shaped cavity, the container mechanism comprises an intermediate plate arranged vertically at an intermediate position of the special-shaped cavity, so that the special-shaped cavity forms a U-shaped flow channel, the first backflow through hole and the evaporating connecting port are arranged at one end of the U-shaped flow channel, and the air inlet is arranged at the other end of the U-shaped flow channel.

9. The high efficiency compact-capacity triangular cycle compressor according to claim 1, characterized in that: The first return flow port is provided with a first annular groove protruding outward, the first spherical joint is clamped and installed in the first annular groove, and the outer wall of the first spherical joint is annular and matched with the inner wall of the first annular groove.

10. The high efficiency compact-capacity triangular cycle compressor according to claim 9, characterized in that: The first spherical joint and the second spherical joint are connected with a pipe body, and the flow guide pipe comprises a channel penetrating through the first spherical joint, the pipe body and the second spherical joint.

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