A scroll refrigeration compressor for heavy trucks

Abstract

The present invention discloses a scroll refrigeration compressor for heavy trucks, the scroll refrigeration compressor includes a body energy collection system, the body energy collection system is used to collect the vibration energy of the heavy truck body, the first refrigerant prepared by the body energy collection system is initially compressed and connected to the first refrigerant air inlet through the first refrigerant inlet pipe, the upper surface of the static scroll shell is also provided with a cooling structure, the second refrigerant in the cooling structure is a low-temperature refrigerant prepared by the body energy collection system. By providing the body energy collection system, the work done by the compressor can be reduced, the compressor energy consumption can be saved, and the cooling structure can cool the scroll refrigeration compressor, thereby reducing the damage to the various components of the compressor and increasing the life of the compressor.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration compressors, and in particular to a scroll refrigeration compressor for a heavy truck. Background Art

[0002] Heavy trucks have the characteristics of long transportation distance, heavy body and large body vibration. Especially for heavy trucks used in cold chain transportation, the refrigeration energy consumption is also high, which will greatly reduce the cruising range of long-distance heavy trucks.

[0003] In this regard, Chinese patent CN202827027U proposes a hydraulic synchronous refrigeration shock absorber. The restoring force of the suspension spring drives the piston to move up and down in a small stroke through the piston rod, realizing the technology of absorbing vibration energy and compressing refrigeration gas. The cold shock absorber is connected in parallel with the air-conditioning compressor to compress the refrigerant for the automobile air-conditioning system.

[0004] However, there are two problems with the above technical solution: 1. The compressor of the heavy truck refrigeration system widely adopts a scroll compressor. The scroll compressor produces a large amount of high-temperature and high-pressure gas during the compression process, which causes the temperature of the compressor to rise rapidly. Long-term operation in a high-temperature environment causes different damages to various components of the compressor, which is not conducive to the long-term stable operation of the scroll compressor; 2. The refrigerant inhaled by the scroll compressor is a low-pressure gaseous refrigerant after absorbing heat in the evaporator. The scroll compressor needs to compress the pressure of the low-pressure refrigerant to a high-pressure refrigerant that meets the circulation requirements of the refrigeration system, and the required energy consumption is relatively large.

[0005] Therefore, the inventors are committed to developing a scroll refrigeration compressor for heavy trucks that can cool the scroll compressor and reduce the energy consumption of the scroll compressor. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a scroll refrigeration compressor for heavy trucks.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A scroll refrigeration compressor for a heavy truck comprises a power crankshaft, a movable scroll and a stationary scroll, wherein the stationary scroll has a stationary scroll housing, a first refrigerant inlet is provided on the side of the stationary scroll housing, and a first refrigerant outlet pipe is provided on the upper surface of the stationary scroll housing.

[0009] Furthermore, the scroll refrigeration compressor also includes a body energy collection system, which is used to collect vibration energy of the heavy truck body. The preliminary compressed first refrigerant prepared by the body energy collection system is connected to the first refrigerant air inlet through a first refrigerant inlet pipe.

[0010] A cooling structure is also provided on the upper surface of the stationary scroll housing, and the second refrigerant in the cooling structure is a low-temperature refrigerant prepared by the vehicle body energy collection system.

[0011] As a further preferred technical solution of the present invention, the vehicle body energy collection system includes a piston compressor, a refrigerant outlet pipe, a refrigerant inlet pipe, a three-way valve A, a three-way valve B, a cooler, an expansion valve A and a connecting pipeline. After the refrigerant is compressed by the piston compressor, it flows into the three-way valve A from the refrigerant outlet pipe. The three-way valve A has a first outlet of the three-way valve A and a second outlet of the three-way valve A. The refrigerant is divided into a first refrigerant and a second refrigerant through the three-way valve A.

[0012] Furthermore, the first refrigerant flows out from the first outlet of the three-way valve A and enters the first refrigerant inlet pipe, the first refrigerant inlet pipe is connected to the first refrigerant air inlet of the scroll refrigeration compressor, and the first refrigerant enters the scroll refrigeration compressor and is discharged from the first refrigerant outlet pipe after being compressed.

[0013] Furthermore, the second refrigerant flows out from the second outlet of the three-way valve A and enters the cooler, and after being cooled in the cooler, flows into the expansion valve A, and flows out from the expansion valve A and enters the second refrigerant inlet pipe, and enters the cooling structure from the second refrigerant inlet pipe, and the second refrigerant absorbs heat in the cooling structure to cool the scroll refrigeration compressor.

[0014] Furthermore, the three-way valve B has a first inlet of the three-way valve B and a second inlet of the three-way valve B. The first refrigerant and the second refrigerant are merged into a refrigerant through the three-way valve B. After being discharged from the first refrigerant outlet pipe and passing through several devices and pipelines, the first refrigerant enters the three-way valve B from the first inlet of the three-way valve B, and the second refrigerant after absorbing heat enters the three-way valve B through the second refrigerant outlet pipe and the first inlet of the three-way valve B. The merged refrigerant enters the piston compressor from the refrigerant inlet pipe.

[0015] As a further preferred technical solution of the present invention, a refrigeration cycle system for a heavy truck includes the vehicle body energy collection system, the scroll refrigeration compressor, a condenser B, an expansion valve B, and an evaporator; after being compressed by the scroll refrigeration compressor, the first refrigerant flows into the condenser B, the expansion valve B and the evaporator in sequence, and then flows out of the evaporator and enters the three-way valve B from the first inlet of the three-way valve B.

[0016] As a further preferred technical solution of the present invention, the tires of the heavy truck are rotatably connected to the axle, a shock-absorbing component is arranged between the frame of the heavy truck and the axle, and the piston compressor is installed between the frame and the axle; the piston compressor includes a cylinder, a piston, a piston rod, a refrigerant inlet pipe, an inlet check valve, an outlet check valve and a refrigerant outlet pipe.

[0017] During operation, the frame moves up and down relative to the axle due to the gravity (self-weight and load) of the heavy truck, driving on curves and bumps on different roads, etc. The vibration of the frame drives the piston rod to drive the piston to reciprocate in the cylinder. The vibration energy of the frame is converted into the pressure of the refrigerant through the transmission of the piston rod. While the piston reciprocates in the cylinder, it continuously inhales refrigerant from the refrigerant inlet pipe through the inlet check valve, and discharges the compressed refrigerant to the refrigerant outlet pipe through the outlet check valve.

[0018] Furthermore, a movable scroll plate is provided on the upper surface of the movable scroll, and the upper end of the power crankshaft is fixedly connected to the bottom surface of the movable scroll. A stationary scroll plate cooperating with the movable scroll plate is provided inside the fixed scroll housing, and a first refrigerant channel is formed along the outer wall surface of the stationary scroll plate, the first refrigerant channel starts from the first refrigerant air inlet and ends at the first refrigerant outlet pipe; a stationary scroll flange is provided at the lower end of the fixed scroll housing, and the bottom surface of the stationary scroll flange constitutes a part of the sliding sealing surface of the fixed scroll.

[0019] During operation, the first refrigerant enters the first refrigerant channel from the first refrigerant inlet, the power crankshaft drives the center of the movable scroll to rotate in a horizontal plane, and the fixed scroll sliding sealing surface is slidably sealed with the upper surface of the movable scroll. Under the cooperation of the movable scroll and the fixed scroll, the first refrigerant is compressed along the first refrigerant channel.

[0020] Furthermore, the projection of the contour of the static vortex sheet in the vertical direction is an Archimedean spiral. In the xy coordinate system, the Archimedean spiral can be expressed as:

[0021] x(k)=(a+b(Kk))×cos(2π(Kk))

[0022] y(k)=(a+b(Kk))×sin(2π(Kk))

[0023] In the formula, K represents the total number of turns of the Archimedean spiral formed by the projection points of the contour of the static vortex sheet in the vertical direction, k represents the number of turns of the projection points of the contour of the static vortex sheet in the vertical direction around the center starting from the starting point of the first refrigerant channel, and 0≤k≤K.

[0024] Further, the cooling structure has a second coolant channel, the cross-sectional shape of the second coolant channel is a semicircular surface, the bottom surface of the semicircular surface coincides with the upper surface of the static scroll shell; the starting end of the second coolant channel is connected to the second refrigerant inlet pipe, and the terminating end of the second coolant channel is connected to the second refrigerant outlet pipe, the projection of the second coolant channel in the vertical direction extends along the first refrigerant channel, and the width of the second coolant channel is equal to the width of the first refrigerant channel; the projection of the second coolant channel in the vertical direction has a first sideline close to the center and a second sideline far from the center, the first sideline and the second sideline are Archimedean spiral sides, the second coolant channel extends along the first sideline, and the first sideline has a starting point and an end point; the point on the first sideline is expressed in the xy coordinate system as:

[0025] x(t)=(a+b(Kt))×cos(2π(Kt))

[0026] y(t)=(a+b(Kt))×sin(2π(Kt))

[0027] In the formula, K represents the total number of turns of the Archimedean spiral formed by the projection points of the contour of the static vortex sheet in the vertical direction, t represents the number of turns of the points on the first edge line around the center starting from the starting point of the first refrigerant channel, and k0≤t≤K.

[0028] Before the scroll refrigeration compressor is provided with the cooling structure, the position corresponding to the point where the temperature of the first refrigerant rises fastest along the first refrigerant passage is k0.

[0029] The liquefaction of the first refrigerant in the scroll refrigeration compressor will impact the running vortex vanes, resulting in a short service life of the compressor. In order to prevent the first refrigerant from not liquefying in the first refrigerant channel, the temperature of the first refrigerant at the end of the first refrigerant channel needs to be higher than its saturation temperature. Selecting the starting point of the first edge line as point t=k0 can better prevent the first refrigerant from not liquefying in the first refrigerant channel, and further can better ensure that the temperature of the first refrigerant at the end of the first refrigerant channel is higher than its saturation temperature.

[0030] The present invention has the following beneficial effects:

[0031] 1. By setting up the vehicle body energy collection system, the first refrigerant entering the scroll refrigeration compressor is preliminarily compressed, thereby reducing the work done by the compressor and saving energy consumption of the compressor; at the same time, by setting up the vehicle body energy collection system, the low-temperature refrigerant prepared by the vehicle body energy collection system cools the scroll refrigeration compressor through the cooling structure, which can reduce the damage to various components of the compressor and increase the life of the compressor; in addition, setting up the cooling structure can reduce the exhaust temperature of the first refrigerant of the scroll refrigeration compressor, thereby improving the refrigeration efficiency of the entire refrigeration cycle system for heavy trucks.

[0032] 2. The piston compressor utilizes the energy of the heavy truck vibration to recover energy and reduce the vibration of the vehicle body at the same time.

[0033] 3. The liquefaction of the first refrigerant in the scroll refrigeration compressor will impact the running vortex vanes, resulting in a short service life of the compressor. In order to prevent the first refrigerant from not liquefying in the first refrigerant channel, the temperature of the first refrigerant at the end of the first refrigerant channel needs to be higher than its saturation temperature. Selecting the starting point of the first edge line as point t=k0 can better prevent the first refrigerant from not liquefying in the first refrigerant channel, and further can better ensure that the temperature of the first refrigerant at the end of the first refrigerant channel is higher than its saturation temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a front view of a scroll refrigeration compressor for heavy trucks;

[0035] Figure 2 This is a refrigeration cycle system diagram for a heavy truck;

[0036] Figure 3 This is a schematic diagram of the installation position of the piston compressor;

[0037] Figure 4 It is an exploded view of a scroll refrigeration compressor;

[0038] Figure 5 This is a top view and bottom projection view of a scroll refrigeration compressor, in which: Figure 5 a is a top view of the scroll refrigeration compressor. Figure 5 b is the front view of the scroll refrigeration compressor. Figure 5 c is a bottom view of the scroll refrigeration compressor;

[0039] Figure 6 is a temperature and saturation temperature curve diagram of the first refrigerant flowing along the first refrigerant channel;

[0040] In the figure: 1 scroll refrigeration compressor, 11 first refrigerant inlet pipe, 12 first refrigerant outlet pipe, 13 second refrigerant inlet pipe, 14 second refrigerant outlet pipe, 15 power crankshaft, 16 movable scroll, 161 movable scroll blade, 17 stationary scroll, 171 stationary scroll housing, 172 first refrigerant inlet, 173 stationary scroll flange, 1731 stationary scroll sliding sealing surface, 174 stationary scroll blade, 175 first refrigerant channel, 18 cooling structure, 181 second refrigerant channel, 182 first sideline, 1821 starting point, 1822 end point;

[0041] 2 piston compressor, 21 cylinder, 22 piston, 23 piston rod, 24 refrigerant inlet pipe, 25 inlet check valve, 26 outlet check valve, 27 refrigerant outlet pipe;

[0042] 31 three-way valve A, 311 three-way valve A first outlet, 312 three-way valve A second outlet, 32 cooler, 33 expansion valve A, 34 condenser B, 35 expansion valve B, 36 evaporator, 37 three-way valve B, 371 three-way valve B first inlet, 372 three-way valve B second inlet;

[0043] 41 tires, 42 axles, 43 shock absorbing components, 44 vehicle frames. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] Reference Figure 1-3 A scroll refrigeration compressor 1 for a heavy truck, the scroll refrigeration compressor 1 includes a power crankshaft 15, a movable scroll 16 and a fixed scroll 17, the fixed scroll 17 has a fixed scroll housing 171, a first refrigerant inlet 172 is provided on the side of the fixed scroll housing 171, and a first refrigerant outlet pipe 12 is provided on the upper surface of the fixed scroll housing 171.

[0046] The scroll refrigeration compressor 1 also includes a body energy collection system, which is used to collect vibration energy of the heavy truck body. The preliminary compressed first refrigerant prepared by the body energy collection system is connected to the first refrigerant air inlet 172 through the first refrigerant inlet pipe 11.

[0047] Furthermore, a cooling structure 18 is also provided on the upper surface of the static scroll housing 171 , and the second refrigerant in the cooling structure 18 is a low-temperature refrigerant prepared by the vehicle body energy collection system.

[0048] It should be noted that, by setting up the vehicle body energy collection system, the first refrigerant entering the scroll refrigeration compressor 1 is preliminarily compressed, thereby reducing the work done by the compressor and saving energy consumption of the compressor; at the same time, by setting up the vehicle body energy collection system, the low-temperature refrigerant prepared by the vehicle body energy collection system is used to cool the scroll refrigeration compressor 1 through the cooling structure 18, which can reduce the damage to the various components of the compressor and increase the life of the compressor; in addition, the setting of the cooling structure 18 can reduce the exhaust temperature of the first refrigerant of the scroll refrigeration compressor 1, thereby improving the refrigeration efficiency of the entire refrigeration cycle system for heavy trucks.

[0049] As a further preferred technical solution of the present invention, the vehicle body energy collection system includes a piston compressor 2, a refrigerant outlet pipe 27, a refrigerant inlet pipe 24, a three-way valve A31, a three-way valve B37, a cooler 32, an expansion valve A33 and a connecting pipeline. After the refrigerant is compressed by the piston compressor 2, it flows into the three-way valve A31 from the refrigerant outlet pipe 27. The three-way valve A31 has a first outlet 311 of the three-way valve A and a second outlet 312 of the three-way valve A. The refrigerant is divided into a first refrigerant and a second refrigerant through the three-way valve A31.

[0050] Furthermore, the first refrigerant flows out from the first outlet 311 of the three-way valve A and enters the first refrigerant inlet pipe 11, the first refrigerant inlet pipe 11 is connected to the first refrigerant air inlet 172 of the scroll refrigeration compressor 1, and the first refrigerant enters the scroll refrigeration compressor 1 and is discharged from the first refrigerant outlet pipe 12 after being compressed.

[0051] Furthermore, the second refrigerant flows out from the second outlet 312 of the three-way valve A and enters the cooler 32. After being cooled in the cooler 32, it flows into the expansion valve A33. After flowing out from the expansion valve A33, it enters the second refrigerant inlet pipe 13, and enters the cooling structure 18 from the second refrigerant inlet pipe 13. The second refrigerant absorbs heat in the cooling structure 18 to cool the scroll refrigeration compressor 1.

[0052] Furthermore, the three-way valve B37 has a first inlet 371 of the three-way valve B and a second inlet 372 of the three-way valve B, and the first refrigerant and the second refrigerant are merged into a refrigerant through the three-way valve B37. After being discharged from the first refrigerant outlet pipe 12 and passing through several devices and pipelines, the first refrigerant enters the three-way valve B37 from the first inlet 371 of the three-way valve B. The second refrigerant after absorbing heat enters the three-way valve B37 through the second refrigerant outlet pipe 14 and the first inlet 371 of the three-way valve B. The merged refrigerant enters the piston compressor 2 from the refrigerant inlet pipe 24, thus completing the refrigeration system cycle for heavy trucks.

[0053] As a further preferred technical solution of the present invention, the refrigeration cycle system for heavy trucks includes the vehicle body energy collection system, the scroll refrigeration compressor 1, the condenser B34, the expansion valve B35, and the evaporator 36. After being compressed by the scroll refrigeration compressor 1, the first refrigerant flows into the condenser B34, the expansion valve B35, and the evaporator 36 in sequence, and then flows out of the evaporator 36 and enters the three-way valve B37 from the first inlet 371 of the three-way valve B.

[0054] It can be understood that, by setting up the vehicle body energy collection system, the first refrigerant entering the scroll refrigeration compressor 1 is preliminarily compressed, thereby reducing the work done by the compressor and saving energy consumption of the compressor; at the same time, by setting up the vehicle body energy collection system, the low-temperature refrigerant prepared by the vehicle body energy collection system is used to cool the scroll refrigeration compressor 1 through the cooling structure 18, which can reduce the damage to the various components of the compressor and increase the life of the compressor; in addition, the setting of the cooling structure 18 can reduce the exhaust temperature of the first refrigerant of the scroll refrigeration compressor 1, thereby improving the refrigeration efficiency of the entire refrigeration cycle system for heavy trucks.

[0055] As a further preferred technical solution of the present invention, the tire 41 of the heavy truck is rotatably connected to the axle 42, a shock absorbing component 43 is provided between the frame 44 of the heavy truck and the axle 42, and the piston compressor 2 is installed between the frame 44 and the axle 42. The piston compressor 2 includes a cylinder 21, a piston 22, a piston rod 23, a refrigerant inlet pipe 24, an inlet check valve 25, an outlet check valve 26 and a refrigerant outlet pipe 27.

[0056] During operation, the frame 44 moves up and down relative to the axle 42 due to the gravity (self-weight and load) of the heavy truck, driving on curves and bumps on different roads, etc. The vibration of the frame 44 drives the piston rod 23 to drive the piston 22 to reciprocate in the cylinder 21. The vibration energy of the frame 44 is converted into the pressure of the refrigerant through the transmission of the piston rod 23. While the piston 22 reciprocates in the cylinder 21, it continuously inhales refrigerant from the refrigerant inlet pipe 24 through the inlet check valve 25, and discharges the compressed refrigerant to the refrigerant outlet pipe 27 through the outlet check valve 26.

[0057] It can be understood that the piston compressor 2 utilizes the energy of the vibration of the heavy truck to recover energy and reduce the vibration of the vehicle body at the same time.

[0058] As a further preferred technical solution of the present invention, refer to Figure 4-5 , a movable scroll 161 is provided on the upper surface of the movable scroll 16, and the upper end of the power crankshaft 15 is fixedly connected to the bottom surface of the movable scroll 16. A fixed scroll 174 cooperating with the movable scroll 161 is provided inside the fixed scroll housing 171, and a first refrigerant channel 175 is formed along the outer wall surface of the fixed scroll 174, and the first refrigerant channel 175 starts from the first refrigerant air inlet 172 and ends at the first refrigerant outlet pipe 12. A fixed scroll flange 173 is provided at the lower end of the fixed scroll housing 171, and the bottom surface of the fixed scroll flange 173 constitutes a part of the fixed scroll sliding sealing surface 1731.

[0059] During operation, the first refrigerant enters the first refrigerant passage 175 from the first refrigerant air inlet 172, the power crankshaft 15 drives the center of the movable scroll 16 to rotate in a horizontal plane, and the fixed scroll sliding sealing surface 1731 slides and seals with the upper surface of the movable scroll 16. With the cooperation of the movable scroll sheet 161 and the fixed scroll sheet 174, the first refrigerant is compressed along the first refrigerant passage 175.

[0060] Reference Figure 5 c. The projection of the profile of the static vortex sheet 174 in the vertical direction is an Archimedean spiral. Figure 5 In the xy coordinate system shown in c, the Archimedean spiral can be expressed as:

[0061] x(k)=(a+b(Kk))×cos(2π(Kk))

[0062] y(k)=(a+b(Kk))×sin(2π(Kk))

[0063] In the formula, K represents the total number of turns of the Archimedean spiral formed by the projection points of the contour of the static vortex sheet 174 in the vertical direction, k represents the number of turns of the projection points of the contour of the static vortex sheet 174 in the vertical direction around the center starting from the starting point of the first refrigerant channel 175, 0≤k≤K, and the coordinates (x, y) represent the position of the point on the Archimedean spiral of the contour of the static vortex sheet 174.

[0064] Further, refer to Figure 5 The cooling structure 18 has a second coolant channel 181, and the cross-sectional shape of the second coolant channel 181 is a semicircular surface, and the bottom surface of the semicircular surface coincides with the upper surface of the fixed scroll housing 171. The starting end of the second coolant channel 181 is connected to the second refrigerant inlet pipe 13, and the ending end of the second coolant channel 181 is connected to the second refrigerant outlet pipe 14. The projection of the second coolant channel 181 in the vertical direction extends along the first refrigerant channel 175, and the width of the second coolant channel 181 is equal to the width of the first refrigerant channel 175. The projection of the second coolant channel 181 in the vertical direction has a first sideline 182 close to the center and a second sideline far from the center. The first sideline 182 and the second sideline are Archimedean spiral sides. The second coolant channel 181 extends along the first sideline 182, and the first sideline 182 has a starting point 1821 and an end point 1822.

[0065] Furthermore, the point on the first edge line 182 is Figure 5 The xy coordinate system shown in c is expressed as:

[0066] x(t)=(a+b(Kt))×cos(2π(Kt))

[0067] y(t)=(a+b(Kt))×sin(2π(Kt))

[0068] In the formula, K represents the total number of turns of the Archimedean spiral formed by the points of the projection of the contour of the static vortex sheet 174 in the vertical direction, t represents the number of turns of the point on the first edge line 182 around the center starting from the starting point of the first refrigerant channel 175, k0≤t≤K, and the coordinates (x, y) represent the position of the point on the first edge line 182.

[0069] Reference Figure 6 Before the scroll refrigeration compressor 1 is provided with the cooling structure 18, the position corresponding to the point where the temperature of the first refrigerant rises fastest along the first refrigerant channel 175 is k0.

[0070] Before the scroll refrigeration compressor 1 is provided with the cooling structure 18, the temperature change of the first refrigerant flowing along the first refrigerant channel 175 is as follows: Figure 6 As shown in the middle curve 1, the saturation temperature change of the first refrigerant flowing along the first refrigerant channel 175 is as follows: Figure 6 As shown in the middle curve 3; after the scroll refrigeration compressor 1 is provided with the cooling structure 18, the temperature change of the first refrigerant flowing along the first refrigerant channel 175 is as shown in Figure 6 As shown in the middle curve 2, the saturation temperature change of the first refrigerant flowing along the first refrigerant channel 175 is as follows: Figure 6 As shown in the middle curve 4.

[0071] It should be noted that the liquefaction of the first refrigerant in the scroll refrigeration compressor 1 will impact the running vortex vanes, resulting in a short service life of the compressor. In order to prevent the first refrigerant from not liquefying in the first refrigerant channel 175, the temperature of the first refrigerant at the end of the first refrigerant channel 175 needs to be higher than its saturation temperature. Selecting the starting point of the first edge line 182 as point t=k0 can better prevent the first refrigerant from not liquefying in the first refrigerant channel 175, and thus can better ensure that the temperature of the first refrigerant at the end of the first refrigerant channel 175 is higher than its saturation temperature.

[0072] It can be understood that the first refrigerant flows along the first refrigerant channel 175 and is compressed, and its temperature rises. The second refrigerant at a low temperature enters the second coolant channel 181 from the starting end of the second coolant channel 181, and the second refrigerant absorbs heat and exchanges heat with the first refrigerant in the downstream. The selection of the starting point of the second coolant channel 181 and the downstream heat exchange method are helpful to prevent the first refrigerant from not liquefying in the first refrigerant channel 175, thereby extending the service life of the scroll refrigeration compressor 1. On the other hand, the temperature of the second refrigerant is reduced due to cooling during the compression process, so that its pressure is also reduced, and its saturation pressure is also reduced, which also helps to ensure that the temperature of the first refrigerant at the end of the first refrigerant channel 175 is higher than its saturation temperature.

[0073] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A scroll refrigeration compressor (1) for a heavy truck, comprising a power crankshaft (15), a movable scroll (16) and a stationary scroll (17), wherein the stationary scroll (17) has a stationary scroll housing (171), a first refrigerant inlet (172) is provided on a side surface of the stationary scroll housing (171), and a first refrigerant outlet pipe (12) is provided on an upper surface of the stationary scroll housing (171); Features: The scroll refrigeration compressor (1) further comprises a vehicle body energy collection system, the vehicle body energy collection system being used to collect vibration energy of the heavy truck body, and the preliminarily compressed first refrigerant prepared by the vehicle body energy collection system being communicated with the first refrigerant air inlet (172) via a first refrigerant inlet pipe (11); The upper surface of the stationary scroll housing (171) is also provided with a cooling structure (18), and the second refrigerant in the cooling structure (18) is a low-temperature refrigerant prepared by the vehicle body energy collection system; The upper surface of the movable scroll (16) is provided with a movable scroll sheet (161), and the upper end of the power crankshaft (15) is fixedly connected to the bottom surface of the movable scroll (16); the interior of the fixed scroll housing (171) is provided with a fixed scroll sheet (174) matched with the movable scroll sheet (161), and a first refrigerant channel (175) is formed along the outer wall surface of the fixed scroll sheet (174), and the first refrigerant channel (175) starts from the first refrigerant air inlet (172) and ends at the first refrigerant outlet pipe (12); the lower end of the fixed scroll housing (171) is provided with a fixed scroll flange (173), and the bottom surface of the fixed scroll flange (173) constitutes a part of the fixed scroll sliding sealing surface (1731); The cooling structure (18) has a second coolant channel (181), the cross-sectional shape of the second coolant channel (181) is a semicircular surface, the bottom surface of the semicircular surface coincides with the upper surface of the fixed scroll shell (171); the starting end of the second coolant channel (181) is connected to the second refrigerant inlet pipe (13), the terminating end of the second coolant channel (181) is connected to the second refrigerant outlet pipe (14), the projection of the second coolant channel (181) in the vertical direction extends along the first refrigerant channel (175), and the second coolant channel (181) is connected to the second refrigerant outlet pipe (14). The width of the second refrigerant channel (181) is equal to the width of the first refrigerant channel (175); the projection of the second refrigerant channel (181) in the vertical direction has a first sideline (182) close to the center and a second sideline far from the center, the first sideline (182) and the second sideline are Archimedean spiral sidelines, the second refrigerant channel (181) extends along the first sideline (182), the first sideline (182) has a starting point (1821) and an end point (1822); the point on the first sideline (182) is expressed in the xy coordinate system as: x(t)=(a+b(Kt))×cos(2π(Kt)) y(t)=(a+b(Kt))×sin(2π(Kt)) In the formula, K represents the total number of turns of the Archimedean spiral formed by the projection points of the contour of the static vortex sheet (174) in the vertical direction, t represents the number of turns of the points on the first side line (182) around the center starting from the starting point of the first refrigerant channel (175), k0≤t≤K; Before the scroll refrigeration compressor (1) is provided with the cooling structure (18), the point where the temperature of the first refrigerant rises fastest along the first refrigerant channel (175) corresponds to a number of turns around the center starting from the starting point of the first refrigerant channel (175) is k0.

2. The scroll refrigeration compressor (1) according to claim 1, characterized in that: The vehicle body energy collection system comprises a piston compressor (2), a refrigerant outlet pipe (27), a refrigerant inlet pipe (24), a three-way valve A (31), a three-way valve B (37), a cooler (32), an expansion valve A (33) and connecting pipelines. After being compressed by the piston compressor (2), the refrigerant flows into the three-way valve A (31) from the refrigerant outlet pipe (27). The three-way valve A (31) has a first outlet (311) and a second outlet (312) of the three-way valve A. The refrigerant is divided into a first refrigerant and a second refrigerant after passing through the three-way valve A (31).

3. The scroll refrigeration compressor (1) according to claim 2, characterized in that: The first refrigerant flows out from the first outlet (311) of the three-way valve A and enters the first refrigerant inlet pipe (11). The first refrigerant inlet pipe (11) is connected to the first refrigerant air inlet (172) of the scroll refrigeration compressor (1). The first refrigerant enters the scroll refrigeration compressor (1) and is compressed before being discharged from the first refrigerant outlet pipe (12).

4. The scroll refrigeration compressor (1) according to claim 3, characterized in that: The second refrigerant flows out from the second outlet (312) of the three-way valve A and enters the cooler (32). After being cooled in the cooler (32), it flows into the expansion valve A (33). After flowing out from the expansion valve A (33), it enters the second refrigerant inlet pipe (13). From the second refrigerant inlet pipe (13), it enters the cooling structure (18). The second refrigerant absorbs heat in the cooling structure (18) to cool the scroll refrigeration compressor (1).

5. The scroll refrigeration compressor (1) according to claim 4, characterized in that: The three-way valve B (37) has a first inlet (371) and a second inlet (372) of the three-way valve B. The first refrigerant and the second refrigerant are merged into a refrigerant through the three-way valve B (37). After being discharged from the first refrigerant outlet pipe (12) and passing through a number of devices and pipelines, the first refrigerant enters the three-way valve B (37) from the first inlet (371) of the three-way valve B. After absorbing heat, the second refrigerant enters the three-way valve B (37) through the second refrigerant outlet pipe (14) and the first inlet (371) of the three-way valve B. The merged refrigerant enters the piston compressor (2) from the refrigerant inlet pipe (24).

6. The scroll refrigeration compressor (1) according to claim 5, characterized in that: The refrigeration cycle system for a heavy truck comprises the vehicle body energy collection system, the scroll refrigeration compressor (1), a condenser B (34), an expansion valve B (35), and an evaporator (36); after being compressed by the scroll refrigeration compressor (1), the first refrigerant flows into the condenser B (34), the expansion valve B (35), and the evaporator (36) in sequence, then flows out of the evaporator (36) and enters the three-way valve B (37) from the first inlet (371) of the three-way valve B.

7. The scroll refrigeration compressor (1) according to claim 6, characterized in that: The tire (41) of the heavy truck is rotatably connected to the axle (42); a shock absorbing component (43) is provided between the frame (44) of the heavy truck and the axle (42); the piston compressor (2) is installed between the frame (44) and the axle (42); the piston compressor (2) comprises a cylinder (21), a piston (22), a piston rod (23), a refrigerant inlet pipe (24), an inlet check valve (25), an outlet check valve (26) and a refrigerant outlet pipe (27).

8. The scroll refrigeration compressor (1) according to claim 1, characterized in that: The projection of the profile of the static vortex sheet (174) in the vertical direction is an Archimedean spiral. In the xy coordinate system, the Archimedean spiral is expressed as: x(k)=(a+b(Kk))×cos(2π(Kk)) y(k)=(a+b(Kk))×sin(2π(Kk)) In the formula, K represents the total number of turns of the Archimedean spiral formed by the projection points of the contour of the static vortex sheet (174) in the vertical direction, k represents the number of turns of the projection points of the contour of the static vortex sheet (174) in the vertical direction around the center starting from the starting point of the first refrigerant channel (175), and 0≤k≤K.

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