CN212690343U - Enhanced vapor injection runner and pump body of compressor - Google Patents

Abstract

The utility model provides an enhanced vapor injection runner and the pump body of compressor. The enhanced vapor injection runner comprises a first air inlet channel, a check valve and a second air inlet channel; one end of the first air inlet channel is communicated with the air injection reservoir, and the other end of the first air inlet channel is communicated with the inner side of an air injection port of the check valve; one end of the second air inlet channel is communicated with the outer side of the air injection port of the check valve, and the other end of the second air inlet channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the air cylinder. The piston can open or close the second air inlet channel, and the enhanced vapor injection channel can reduce the backflow of a high-pressure refrigerant in the cylinder to the second air inlet channel; the check valve can be opened only in one direction, so that high-pressure refrigerant can be prevented from flowing back to the first air inlet channel; the air injection valve seat is not directly communicated with the cylindrical side surface of the inner cavity of the cylinder, so that the communication leakage of a high-pressure cavity and a low-pressure cavity caused by the fact that a piston passes through the cylindrical side surface of the inner cavity of the cylinder with a notch is avoided, the position of the valve seat can be adjusted, and the performance of the compressor is further improved; the clearance volume is smaller, and the performance of the compressor is improved.

Description

Enhanced vapor injection runner and pump body of compressor

Technical Field

The utility model relates to a compressor field, in particular to enhanced vapor injection runner and the pump body of compressor.

Background

The enhanced vapor injection compressor is widely applied to the heating field, in particular to the low-temperature heating field. The existing types of enhanced vapor injection channels are mainly check valve type channels and piston cutting type channels.

In the check valve type flow passage, a check valve is generally provided on a cylinder or an intermediate plate. As shown in fig. 1, fig. 1 illustrates an example in which the check valve is installed in the cylinder, a1 in fig. 1 is a valve seat of the check valve, a2 is an intake passage for enhanced vapor injection, a valve plate and a baffle of the check valve are installed on the valve seat by screws or rivets, an opening of the valve seat a1 is directly communicated with a cylindrical side surface of an inner cavity of the cylinder, and refrigerant directly enters a high-pressure side of the inner cavity of the cylinder after passing through the opening of the valve seat a1 from the intake passage a 2. The structure has the advantage that the high-pressure refrigerant in the cylinder can be prevented from flowing back to the air inlet channel a2 after air injection, so that the performance of the compressor is reduced. The disadvantage is that the valve seat a1 can only be placed close to the high pressure side of the vane slot as much as possible, but the position is not the best air injection position, for example, the position is placed far away from the high pressure side of the vane slot, when the compressor is running, when the piston in the cylinder passes through the passage position where the valve seat a1 and the cylinder are directly communicated, the high pressure side refrigerant in the cavity of the cylinder can leak to the low pressure side, which can reduce the performance of the compressor.

In the piston-cut type flow passage, the intake passage is generally provided in the intermediate plate or the lower cylinder head. As shown in fig. 2, the intake passage is provided in the intermediate plate as an example, b1 in fig. 2 is an intake passage for enhanced vapor injection, and after entering from the intake passage b1, the refrigerant enters the high pressure side of the inner cavity of the cylinder through the axial small holes b2 on one side or both sides in the radial direction of the cylinder. The advantage of this structure lies in comparing the check valve structure, and the structure is simpler, and the reliability is higher, and inlet channel can place in best jet-propelled position, through the switch of the terminal surface control inlet channel of the piston in the inlet channel when the compressor operation. The compressor has the defects that backflow high-pressure refrigerant exists in the air inlet channel, so that the clearance volume of the air inlet channel is large, and the performance of the compressor is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an enhanced vapor injection runner and the pump body of compressor to solve current enhanced vapor injection runner set up the technical problem that the position is not good or the clearance volume is big.

In order to solve the technical problem, the utility model provides an enhanced vapor injection runner of compressor, the compressor includes cylinder and piston, the cylinder has an inner chamber, the inner chamber includes top surface, bottom surface and cylindrical side, the cylinder is provided with gas vent and induction port, the inner chamber is separated into high pressure side and low pressure side by the blade, the gas vent is located the high pressure side, the induction port is located the low pressure side, the piston is installed in the inner chamber; the enhanced vapor injection runner comprises a first air inlet channel, a check valve and a second air inlet channel, the check valve comprises an air injection port, and a refrigerant flows from the inner side of the air injection port to the outer side of the air injection port; one end of the first air inlet channel is communicated with an air injection reservoir, and the other end of the first air inlet channel is communicated with the inner side of an air injection port of the check valve; one end of the second air inlet channel is communicated with the outer side of the air injection port of the check valve, and the other end of the second air inlet channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the air cylinder.

Optionally, the compressor is a single-cylinder compressor, and the single-cylinder compressor comprises an upper cylinder cover, a single cylinder and a lower cylinder cover; the single cylinder comprises an upper end surface and a lower end surface, the upper cylinder cover is arranged on the upper end surface of the single cylinder, and the lower cylinder cover is arranged on the lower end surface of the single cylinder;

the first intake passage and the check valve are provided on the single cylinder; the second air inlet channel comprises an air injection valve seat clearance and a communication channel, one end of the air injection valve seat clearance is communicated with the outer side of an air injection port of the check valve, the other end of the air injection valve seat clearance is communicated with one end of the communication channel, and the other end of the communication channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the air cylinder; the communicating channel is arranged on the upper cylinder cover or the lower cylinder cover.

Optionally, the cross section of the communication channel along the axial direction parallel to the cylinder is V-shaped, and the V-shaped communication channel includes a first channel and a second channel which are both linear; the check valve comprises a groove-shaped valve seat, and the valve seat is arranged on the upper end surface or the lower end surface of the single cylinder; one end of the first channel is communicated with the groove-shaped opening of the valve seat, and the other end of the first channel is communicated with one end of the second channel; the other end of the second channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the single cylinder.

Optionally, the enhanced vapor injection runner is arranged on the upper cylinder cover or the lower cylinder cover.

Optionally, the compressor is a double-cylinder compressor, and the double-cylinder compressor comprises an upper cylinder cover, an upper cylinder, a middle plate, a lower cylinder and a lower cylinder cover;

the first intake passage and the check valve are provided on the upper cylinder or the lower cylinder at the same time; the second air inlet channel comprises an air injection valve seat clearance and a communication channel, one end of the air injection valve seat clearance is communicated with the outer side of an air injection port of the check valve, the other end of the air injection valve seat clearance is communicated with one end of the communication channel, and the other end of the communication channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the air cylinder; the intercommunication passageway sets up on the intermediate lamella, the intercommunication passageway includes the three port that communicates each other, three port is first port, second port and third port respectively, first port with the jet-propelled mouth outside intercommunication of check valve, the second port with the bottom surface intercommunication of the high pressure side of the inner chamber of last cylinder, the third port with the top surface intercommunication of the high pressure side of the inner chamber of lower cylinder.

Optionally, the enhanced vapor injection flow channel is disposed on the middle plate.

Optionally, the cross section of the communication channel along the axial direction parallel to the upper cylinder is Y-shaped, and the three ports respectively correspond to three vertexes of Y.

Optionally, the compressor is a double-cylinder compressor, and the double-cylinder compressor comprises an upper cylinder cover, an upper cylinder, a middle plate, a lower cylinder and a lower cylinder cover;

go up the cylinder cap with set up one respectively on the lower cylinder cap the enhanced vapor injection runner, the enhanced vapor injection runner in the last cylinder cap with the top surface intercommunication of the high pressure side of the inner chamber of last cylinder, the enhanced vapor injection runner in the lower cylinder cap with the bottom surface intercommunication of the high pressure side of the inner chamber in the lower cylinder.

Optionally, the cylinder includes a vane groove, an included angle between the enhanced vapor injection channel and the vane groove is k, and k is greater than or equal to 60 degrees and less than or equal to 135 degrees.

The utility model also provides a pump body of compressor, the pump body includes above-mentioned any one the enhanced vapor injection runner, cylinder and piston, the cylinder has an inner chamber, the inner chamber includes top surface, bottom surface and cylindrical side, the cylinder is provided with gas vent and induction port, the inner chamber is separated into high-pressure side and low-pressure side by the blade, the gas vent is located the high-pressure side, the induction port is located the low-pressure side, the piston is installed in the inner chamber;

the enhanced vapor injection runner comprises a first air inlet channel, a check valve and a second air inlet channel, the check valve comprises an air injection port, and a refrigerant flows from the inner side of the air injection port to the outer side of the air injection port; one end of the first air inlet channel is communicated with an air injection reservoir, and the other end of the first air inlet channel is communicated with the inner side of an air injection port of the check valve; one end of the second air inlet channel is communicated with the outer side of the air injection port of the check valve, and the other end of the second air inlet channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the air cylinder.

The utility model provides an enhanced vapor injection runner and a pump body of a compressor, a piston can open or close a second air inlet channel in reciprocating motion, so the enhanced vapor injection runner can reduce high-pressure refrigerant in a cylinder to flow back to the second air inlet channel; the check valve can be opened only in one direction, so that the performance of the compressor can be prevented from being reduced due to the fact that high-pressure refrigerant flows back into the first air inlet channel; the air injection valve seat is not directly communicated with the cylindrical side surface of the inner cavity of the cylinder, and the communication leakage of a high-pressure cavity and a low-pressure cavity caused by the fact that a piston passes through the cylindrical side surface of the inner cavity of the cylinder with a gap is avoided, so that the position of the valve seat can be adjusted, and the valve seat is not required to be placed on the opposite side of an exhaust port of the cylinder, so that the performance of the compressor is further improved; the clearance volume is the space of the second air inlet channel, and is smaller, so that the performance of the compressor is improved.

Drawings

FIG. 1 is a schematic view of a prior art check valve cylinder assembly;

FIG. 2 is a schematic diagram of a prior art piston-cut flow passage intermediate plate;

fig. 3a is a schematic structural view of a lower end surface of a cylinder assembly when a valve seat is mounted on the lower end surface of a cylinder in a single cylinder compressor according to an embodiment of the present invention;

FIG. 3b is a schematic structural view of the upper end face of the lower cylinder head corresponding to FIG. 3 a;

FIG. 3c is a view A-A corresponding to FIG. 3 a;

FIG. 3d is an enlarged view of a portion of FIG. 3c at location I, wherein the arrows within the enhanced vapor injection flowpath indicate the direction of flow;

fig. 4a is a schematic structural view of a lower end surface of a cylinder assembly when a valve seat is installed on the lower end surface of a cylinder in a dual cylinder compressor according to an embodiment of the present invention;

FIG. 4b is a schematic view of the upper end surface of the corresponding middle plate of FIG. 4 a;

FIG. 4c is a view B-B corresponding to FIG. 4 a;

FIG. 4d is an enlarged fragmentary view taken at location II in FIG. 4c, with the arrows within the enhanced vapor injection flowpath illustrating the direction of flow of the gas stream;

fig. 5a is a schematic structural view of a lower end surface of a cylinder when an enhanced vapor injection flow channel is installed on a middle plate in a dual-cylinder compressor according to an embodiment of the present invention;

FIG. 5b is a schematic view of the upper end surface of the corresponding middle plate of FIG. 5 a;

FIG. 5C is a view C-C corresponding to FIG. 5 b;

FIG. 5d is an enlarged view of a portion of FIG. 5c at position III, with the arrows within the enhanced vapor injection channel indicating the direction of flow of the gas stream.

[ reference numerals are described below ]:

valve seat-a 1, air inlet channel-a 2, air inlet channel-b 1, axial small hole-b 2;

the air cylinder comprises an upper cylinder cover-1, a single cylinder-2, a lower cylinder cover-3, a piston-4, a crankshaft-5, an exhaust port-6, a vane groove-7, a second channel-8, a first channel-9, a check valve-10, a cylinder assembly-21, an exhaust valve plate-22, a baffle-23, a first air inlet channel-24, a second air inlet channel-25 and a communicating channel-26;

an upper cylinder cover-11, an upper cylinder-12, a middle plate-17, a lower cylinder-16, a lower cylinder cover-13, a piston-41, a piston-42, a crankshaft-15, an upper cylinder assembly-31, an exhaust valve plate-32 and a baffle-33;

an upper cylinder cover-51, an upper cylinder-52, a middle plate-57, a lower cylinder-56, a lower cylinder cover-53, a piston-41, a piston-42, a crankshaft-55, a middle plate assembly-71, an exhaust valve plate-72 and a baffle-73.

Detailed Description

In order to make the objects, advantages and features of the present invention clearer, the enhanced vapor injection flow passage and the pump body of the compressor provided by the present invention are further described in detail with reference to the accompanying drawings. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

Referring to fig. 3a to 3d, the present embodiment provides an enhanced vapor injection channel of a compressor, the compressor includes a cylinder and a piston, the cylinder has an inner cavity, the inner cavity includes a top surface, a bottom surface and a cylindrical side surface, the cylinder is provided with an exhaust port 6 and an intake port, the inner cavity is divided into a high pressure side and a low pressure side by a vane, the exhaust port 6 is located at the high pressure side, the intake port is located at the low pressure side, and the piston 4 is installed in the inner cavity; the enhanced vapor injection runner comprises a first air inlet channel 24, a check valve 10 and a second air inlet channel 25, wherein the check valve 10 comprises an air injection port, and a refrigerant flows from the inner side of the air injection port to the outer side of the air injection port; one end of the first air inlet channel 24 is communicated with an air injection liquid storage device, the other end of the first air inlet channel is communicated with the inner side of an air injection port of the check valve 10, one end of the second air inlet channel 25 is communicated with the outer side of the air injection port of the check valve 10, and the other end of the first air inlet channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the cylinder. The high-pressure side of the inner cavity of the cylinder refers to the side of the interior of the cylinder close to the exhaust port, and the inner cavity of the cylinder on the left side of the blade groove 7 in fig. 3a is the high-pressure side; the check valve 10 comprises a valve seat, a baffle plate 23, an exhaust valve plate 22 and a rivet or a screw; when the compressor is placed as shown in fig. 3c, the top surface, the bottom surface and the cylindrical side surface of the inner cavity of the cylinder are respectively the upper end surface, the lower end surface and the circumferential side surface of the inner wall of the cylinder; the air injection reservoir is used for conveying a refrigerant to an inner cavity of the air cylinder.

In the enhanced vapor injection channel of the compressor provided by the embodiment, the piston 4 can open or close the second air inlet channel 25 in the reciprocating motion, so that the enhanced vapor injection channel can reduce the backflow of a high-pressure refrigerant in a cylinder to the second air inlet channel 25; the check valve 10 can be opened only in one direction, so that the performance of the compressor can be prevented from being reduced due to the fact that high-pressure refrigerant flows back into the first air inlet channel 24; the air injection valve seat is not directly communicated with the cylindrical side surface of the inner cavity of the cylinder, so that the communication leakage of a high-pressure cavity and a low-pressure cavity caused by the fact that the piston 4 passes through the cylindrical side surface of the inner cavity of the cylinder with a gap is avoided, the position of the valve seat can be adjusted, and the valve seat is not required to be placed on the opposite side of the exhaust port 6 of the cylinder, so that the performance of the compressor is further improved; the clearance volume is the space of the second intake passage 25, and is small, thereby improving the performance of the compressor.

Optionally, referring to fig. 3a to 3d, the compressor is a single-cylinder compressor, and the compressor includes an upper cylinder cover 1, a single cylinder 2 and a lower cylinder cover 3; the single cylinder 2 comprises an upper end surface and a lower end surface, the upper cylinder cover 1 is installed on the upper end surface of the single cylinder 2, and the lower cylinder cover 3 is installed on the lower end surface of the single cylinder 2; the first intake passage 24 and the check valve 10 are provided on the single cylinder 2; the second air inlet channel 25 comprises an air injection valve seat clearance and a communication channel 26, one end of the air injection valve seat clearance is communicated with the outer side of an air injection port of the check valve, the other end of the air injection valve seat clearance is communicated with one end of the communication channel 26, and the other end of the communication channel 26 is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the cylinder; the communication passage 26 is provided in the upper cylinder head 1 or the lower cylinder head 3. Wherein, the single cylinder 2 actually refers to a cylinder in a single cylinder compressor, and is called a single cylinder for convenience of reference; the air ejection seat clearance refers to a space between the outside of the air ejection port of the check valve and one end of the communication passage 26.

The enhanced vapor injection runner of the compressor provided by the embodiment can be applied to a single-cylinder compressor, and not only has a non-return effect, but also has smaller clearance volume, so that the performance of the compressor is improved.

Alternatively, referring to fig. 3a to 3d, the cross section of the communication channel 26 along the axial direction parallel to the cylinder is V-shaped, and the V-shaped communication channel 26 includes a first channel 9 and a second channel 8 which are both linear; the check valve 10 comprises a groove-shaped valve seat which is arranged on the upper end surface or the lower end surface of the single cylinder 2; one end of the first channel 9 is communicated with the groove-shaped opening of the valve seat, and the other end of the first channel is communicated with one end of the second channel 8; the other end of the second channel 8 is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the single cylinder 2, wherein the first channel 9 and the second channel 8 form a V shape, the extending direction of the second channel 8 can be perpendicular to the top surface or the bottom surface of the inner cavity of the single cylinder 2, and the extending direction of the first channel 9 can be an inclined channel which forms a certain included angle with the top surface or the bottom surface of the inner cavity of the single cylinder 2.

Specifically, as shown in fig. 3a to fig. 3d, the first intake channel 24 and the check valve 10 are disposed near the lower end surface of the single cylinder, wherein fig. 3c is a schematic structural view of the pump body in the direction a-a corresponding to fig. 3a, and the pump body is composed of an upper cylinder cover 1, the single cylinder 2, a lower cylinder cover 3, a piston 4, a crankshaft 5, and the like; the check valve 10 comprises a valve seat, an exhaust valve plate 22, a baffle plate 23 and a rivet or a screw; fig. 3a is a schematic view of the lower end surface of the single cylinder 2, the lower end surface of the single cylinder 2 is provided with the groove, the valve seat of the check valve 10 is installed in the groove, and the first air inlet channel 24 for air injection is arranged along the radial direction of the cylinder; fig. 3b shows the lower cylinder head 3, the communication channel 26 includes two small holes disposed on the upper end surface of the lower cylinder head 3, the two small holes are the first channel 9 and the second channel 8, respectively, one end of the first channel 9 is communicated with the groove, and the other end is communicated with one end of the second channel 8; the other end of the second channel 8 is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the single cylinder 2, and the two small holes are designed in a V shape so as to be convenient to process; fig. 3d is a partially enlarged schematic view of the enhanced vapor injection flow channel, an arrow in the enhanced vapor injection flow channel indicates a flow direction of the gas flow, the gas flow flows from a first gas inlet channel 24 (the first gas inlet channel 24 may be a stepped hole, and the stepped hole may be different axes) of the single cylinder 2 (the single cylinder 2 is provided with some parts and may be referred to as a cylinder assembly 21), and the gas flow flows into the exhaust valve plate 22 after being discharged from the exhaust valve plate 22, enters the valve seat cavity (i.e., the gas injection valve seat clearance), the first channel 9 and the second channel 8 of the lower cylinder cover 3, and enters the high pressure side of the cylinder from the second channel 8.

In this embodiment, the clearance volume of the compressor only includes the volume of the V-shaped communication channel on the lower cylinder cover 3 and the volume of the valve seat cavity on the cylinder assembly 21, and the clearance volume is small; the refrigerant in the high-pressure cavity can not reversely pass through the air discharge valve plate 22, and the air discharge valve plate 22 plays a role in check.

In specific use, referring to the structure shown in fig. 3 a-3 d, the air injection valve seat is arranged on the upper end surface of the air cylinder, and two small holes are arranged on the lower end surface of the upper cylinder cover to form a communication channel, referring to fig. 3b, one hole is positioned on the inner side of the cylinder diameter at the opening of the upper cylinder cover, the other hole is positioned on the outer side of the cylinder diameter at the projection of the upper cylinder cover, and the channels of the two holes are communicated. This also achieves the above-described air injection function.

Alternatively, referring to fig. 3c and 3d, the enhanced vapor injection channel is disposed on the upper cylinder head 1 or the lower cylinder head 3. The enhanced vapor injection channel can be arranged on the upper cylinder cover 1 or the lower cylinder cover 3 under the condition that the thicknesses of the upper cylinder cover 1 and the lower cylinder cover 3 allow.

Optionally, referring to fig. 4a to 4d, the compressor is a double-cylinder compressor, and the double-cylinder compressor includes an upper cylinder cover 11, an upper cylinder 12, a middle plate 17, a lower cylinder 16, and a lower cylinder cover 13; the first intake passage and the check valve are provided on the upper cylinder 11 or the lower cylinder 16 at the same time; the second air inlet channel comprises an air injection valve seat clearance and a communication channel, one end of the air injection valve seat clearance is communicated with the outer side of an air injection port of the check valve, the other end of the air injection valve seat clearance is communicated with one end of the communication channel, and the other end of the communication channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the air cylinder; the intercommunication passageway sets up on the intermediate plate 17, the intercommunication passageway includes the three port of mutual intercommunication, three port is first port, second port and third port respectively, first port with the jet-propelled mouth outside intercommunication of check valve, the second port with the bottom surface intercommunication of the high pressure side of the inner chamber of last cylinder, the third port with the top surface intercommunication of the high pressure side of the inner chamber of lower cylinder.

FIG. 4c is a schematic view of a double-cylinder air injection pump body, wherein the check valve is mounted on the lower end surface of the upper cylinder, and the pump body comprises an upper cylinder cover 11, an upper cylinder 12, a middle plate 17, a lower cylinder 16, a lower cylinder cover 13, pistons 41 and 42, a crankshaft 15 and the like; the check valve comprises a valve seat, a discharge valve plate 32, a baffle plate 33, a rivet or a screw. Fig. 4a is a schematic structural diagram of a lower end surface of an upper cylinder assembly 31 (the upper cylinder 12 may be referred to as the upper cylinder assembly 31 after being provided with a check valve), wherein an air injection valve seat is arranged on the lower end surface of the upper cylinder 12, and a first air inlet channel for air injection is arranged in the radial direction of the upper cylinder 12. FIG. 4b is a schematic view of the upper end surface of the middle plate 17, wherein two small holes are arranged on the upper end surface of the middle plate 17 to form a communication channel, the opening of one hole is arranged at the inner side of the cylinder diameter, and the opening of the other hole is arranged at the outer side of the cylinder diameter; the lower end surface of the middle plate is provided with an opening of one hole at the inner side of the cylinder diameter, and the channels of the three holes are communicated. Fig. 4d is a partial schematic view of an air injection flow path, the section of the communication channel along the axial direction parallel to the upper air cylinder can be in a Y shape, the three ports respectively correspond to three vertexes of the Y, and the Y shape is convenient to process; the air jet can flow to the air discharge valve plate 32 from the stepped hole (the stepped hole can be different axes) of the upper cylinder 12, after the air jet is discharged from the air discharge valve plate 32, the air jet enters the valve seat cavity and the small hole channel of the middle plate 17, namely the Y-shaped communication channel, and respectively enters the high pressure cavity of the upper cylinder 12 and the high pressure cavity of the lower cylinder 16 from the small hole channel, and because the double-cylinder pistons are oppositely arranged, the pistons can alternately cover the small hole channels, namely alternately jet air to the upper cylinder 12 and the lower cylinder 16.

The clearance volume in this embodiment includes only the volume of the Y-shaped channel on the intermediate plate 17 and the volume of the valve seat cavity in the upper cylinder assembly 31, and is small; the refrigerant in the high-pressure cavity can not reversely pass through the air discharge valve plate 32, and the air discharge valve plate 32 plays a role in check.

In specific use, referring to the structure shown in fig. 4 a-4 d, the air injection valve seat is arranged on the upper end surface of the lower cylinder, two small holes are arranged on the lower end surface of the middle plate, the opening of one hole is arranged on the inner side of the cylinder diameter, the opening of the other hole is arranged on the outer side of the cylinder diameter, the upper end surface of the middle plate is provided with one hole arranged on the inner side of the opened cylinder diameter, and the channels of the three holes are communicated, so that the double-cylinder air injection function can be realized.

Similarly, referring to the structure shown in fig. 4a to 4d, the enhanced vapor injection channels may be respectively disposed on the upper cylinder and the lower cylinder, the enhanced vapor injection channel in the upper cylinder is used for injecting vapor to the high-pressure side of the inner cavity in the upper cylinder, and the enhanced vapor injection channel in the lower cylinder is used for injecting vapor to the high-pressure side of the inner cavity in the lower cylinder.

Alternatively, as shown with reference to fig. 5 a-5 d, the enhanced vapor injection flow channel is mounted on the intermediate plate.

Fig. 5c is a schematic view of a two-cylinder jet pump body, the check valve is mounted on the middle plate, and the pump body is composed of an upper cylinder cover 51, an upper cylinder 52, a middle plate 57, a lower cylinder 56, a lower cylinder cover 53, pistons 41 and 42, a crankshaft 55 and the like. The check valve comprises a valve seat, a vent flap 72, a flapper 73, a rivet or a screw. Fig. 5a is a schematic view of the lower end surface of the upper cylinder 52. Fig. 5b is a schematic diagram of the upper end surface of the intermediate plate 57, in which an air injection valve seat is arranged on the upper end surface, a first air inlet channel for air injection is radially arranged (the intermediate plate 57 is provided with the air injection valve seat and then can be called as an intermediate plate assembly 71), the upper end surface and the lower end surface of the intermediate plate 57 are respectively provided with a small hole with an opening at the inner side of the cylinder diameter and communicated with each other, the upper end of the intermediate plate 57 is also provided with a small hole communicated with the valve seat opening (namely, the valve seat cavity), and the three small holes are communicated with each other to. Fig. 5d is a partial schematic view of the air injection flow path, the air injection flow can flow from the stepped hole (the stepped hole may be different from the axis) of the middle plate assembly 71 to the air discharge valve plate 72, and after being discharged from the air discharge valve plate 72, the air flow enters the valve seat cavity and the Y-shaped air flow channel (i.e., the Y-shaped communication channel) communicating with the upper and lower cylinders, and respectively enters the high pressure cavity of the upper cylinder 52 and the high pressure cavity of the lower cylinder 56 from the Y-shaped air flow channel, and because the two cylinders of the pistons are relatively placed, the pistons can alternately cover the small hole channels, i.e., alternately inject air to the upper cylinder 52 and the.

In this embodiment, the clearance volume includes only the volume of the Y-shaped airflow channel on the intermediate plate 57 and the volume of the nozzle valve seat cavity, and the clearance volume is small; the refrigerant in the high-pressure cavity can not reversely pass through the air discharge valve plate 72, and the air discharge valve plate 72 plays a role in check.

In specific use, referring to the structure shown in fig. 5 a-5 d, the air injection valve seat is arranged on the lower end surface of the middle plate, the upper end surface and the lower end surface of the middle plate are respectively provided with a small hole with an opening on the inner side of the cylinder diameter and communicated with the small hole, and the lower end surface of the middle plate is also provided with a small hole communicated with the opening of the valve seat, so that the double-cylinder air injection function can be realized.

Similarly, referring to the structure shown in fig. 5a to 5d, one enhanced vapor injection channel may be respectively disposed on the upper and lower end surfaces of the middle plate, the enhanced vapor injection channel in the upper end surface of the middle plate is used for injecting vapor to the high-pressure side of the inner cavity in the upper cylinder, and the enhanced vapor injection channel in the lower end surface of the middle plate is used for injecting vapor to the high-pressure side of the inner cavity in the lower cylinder.

Optionally, referring to fig. 5a to 5d, the compressor is a dual-cylinder compressor, and the dual-cylinder compressor includes an upper cylinder cover, an upper cylinder, a middle plate, a lower cylinder, and a lower cylinder cover; go up the cylinder cap with set up one respectively on the lower cylinder cap the enhanced vapor injection runner, the enhanced vapor injection runner in the last cylinder cap with the top surface intercommunication of the high pressure side of the inner chamber of last cylinder, the enhanced vapor injection runner in the lower cylinder cap with the bottom surface intercommunication of the high pressure side of the inner chamber in the lower cylinder.

According to the enhanced vapor injection channel of the compressor, under the condition that the thicknesses of an upper cylinder cover and a lower cylinder cover allow, the enhanced vapor injection channel can be arranged on the upper cylinder cover or the lower cylinder cover.

Optionally, referring to fig. 5a, the cylinder includes a vane slot, an included angle between the enhanced vapor injection channel and the vane slot is k, and k is greater than or equal to 60 ° and less than or equal to 135 °. Experiments prove that the performance of the compressor can be improved by designing k to be more than or equal to 60 degrees and less than or equal to 135 degrees.

Based on the same technical conception with the enhanced vapor injection runner of above-mentioned compressor, the utility model provides a pair of enhanced vapor injection runner of compressor also can use in the compressor more than three jars and three jars.

Based on the same technical concept as the enhanced vapor injection flow channel of the compressor, the utility model also provides a pump body of the compressor, the pump body comprises the enhanced vapor injection flow channel, a cylinder and a piston, the cylinder is provided with an inner cavity, the inner cavity comprises a top surface, a bottom surface and a cylindrical side surface, the cylinder is provided with an exhaust port and an air suction port, the inner cavity is divided into a high-pressure side and a low-pressure side by a blade, the exhaust port is positioned on the high-pressure side, the air suction port is positioned on the low-pressure side, and the piston is installed in the inner cavity; the enhanced vapor injection runner comprises a first air inlet channel, a check valve and a second air inlet channel, the check valve comprises an air injection port, and a refrigerant flows from the inner side of the air injection port to the outer side of the air injection port; one end of the first air inlet channel is communicated with an air injection reservoir, and the other end of the first air inlet channel is communicated with the inner side of an air injection port of the check valve; one end of the second air inlet channel is communicated with the outer side of the air injection port of the check valve, and the other end of the second air inlet channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the air cylinder.

To sum up, the utility model provides a piston can open or seal the second air inlet channel in reciprocating motion for the enhanced vapor injection runner and the pump body of compressor, so the enhanced vapor injection runner can reduce the high-pressure refrigerant in the cylinder and flow back to the second air inlet channel; the check valve can be opened only in one direction, so that the performance of the compressor can be prevented from being reduced due to the fact that high-pressure refrigerant flows back into the first air inlet channel; the air injection valve seat is not directly communicated with the cylindrical side surface of the inner cavity of the cylinder, and the communication leakage of a high-pressure cavity and a low-pressure cavity caused by the fact that a piston passes through the cylindrical side surface of the inner cavity of the cylinder with a gap is avoided, so that the position of the valve seat can be adjusted, and the valve seat is not required to be placed on the opposite side of an exhaust port of the cylinder, so that the performance of the compressor is further improved; the clearance volume is the space of the second air inlet channel, and is smaller, so that the performance of the compressor is improved.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the claims of the present invention.

Claims (10)

1. The enhanced vapor injection runner of the compressor is characterized by comprising a cylinder and a piston, wherein the cylinder is provided with an inner cavity, the inner cavity comprises a top surface, a bottom surface and a cylindrical side surface, the cylinder is provided with an exhaust port and an air suction port, the inner cavity is divided into a high-pressure side and a low-pressure side by a blade, the exhaust port is positioned on the high-pressure side, the air suction port is positioned on the low-pressure side, and the piston is arranged in the inner cavity; the enhanced vapor injection runner comprises a first air inlet channel, a check valve and a second air inlet channel, the check valve comprises an air injection port, and a refrigerant flows from the inner side of the air injection port to the outer side of the air injection port; one end of the first air inlet channel is communicated with an air injection reservoir, and the other end of the first air inlet channel is communicated with the inner side of an air injection port of the check valve; one end of the second air inlet channel is communicated with the outer side of the air injection port of the check valve, and the other end of the second air inlet channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the air cylinder.

2. The enhanced vapor injection flow channel of the compressor as claimed in claim 1, wherein the compressor is a single-cylinder compressor, and the single-cylinder compressor comprises an upper cylinder cover, a single cylinder and a lower cylinder cover; the single cylinder comprises an upper end surface and a lower end surface, the upper cylinder cover is arranged on the upper end surface of the single cylinder, and the lower cylinder cover is arranged on the lower end surface of the single cylinder;

the first intake passage and the check valve are provided on the single cylinder; the second air inlet channel comprises an air injection valve seat clearance and a communication channel, one end of the air injection valve seat clearance is communicated with the outer side of an air injection port of the check valve, the other end of the air injection valve seat clearance is communicated with one end of the communication channel, and the other end of the communication channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the air cylinder; the communicating channel is arranged on the upper cylinder cover or the lower cylinder cover.

3. The enhanced vapor injection channel of a compressor as claimed in claim 2, wherein the cross section of the communication channel along the direction parallel to the axial direction of the cylinder is V-shaped, and the V-shaped communication channel comprises a first channel and a second channel which are both linear; the check valve comprises a groove-shaped valve seat, and the valve seat is arranged on the upper end surface or the lower end surface of the single cylinder; one end of the first channel is communicated with the groove-shaped opening of the valve seat, and the other end of the first channel is communicated with one end of the second channel; the other end of the second channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the single cylinder.

4. The enhanced vapor injection flow channel of a compressor as claimed in claim 2, wherein the enhanced vapor injection flow channel is disposed on the upper cylinder head or the lower cylinder head.

5. The enhanced vapor injection channel of a compressor as claimed in claim 1, wherein the compressor is a double-cylinder compressor, and the double-cylinder compressor comprises an upper cylinder cover, an upper cylinder, a middle plate, a lower cylinder and a lower cylinder cover;

the first intake passage and the check valve are provided on the upper cylinder or the lower cylinder at the same time; the second air inlet channel comprises an air injection valve seat clearance and a communication channel, one end of the air injection valve seat clearance is communicated with the outer side of an air injection port of the check valve, the other end of the air injection valve seat clearance is communicated with one end of the communication channel, and the other end of the communication channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the air cylinder; the intercommunication passageway sets up on the intermediate lamella, the intercommunication passageway includes the three port that communicates each other, three port is first port, second port and third port respectively, first port with the jet-propelled mouth outside intercommunication of check valve, the second port with the bottom surface intercommunication of the high pressure side of the inner chamber of last cylinder, the third port with the top surface intercommunication of the high pressure side of the inner chamber of lower cylinder.

6. The enhanced vapor injection flowpath of a compressor as set forth in claim 5 wherein said enhanced vapor injection flowpath is disposed in said intermediate plate.

7. The enhanced vapor injection channel of a compressor as claimed in claim 5, wherein the cross section of the communication channel along the direction parallel to the axial direction of the upper cylinder is Y-shaped, and the three ports correspond to three vertexes of Y respectively.

8. The enhanced vapor injection channel of a compressor as claimed in claim 1, wherein the compressor is a double-cylinder compressor, and the double-cylinder compressor comprises an upper cylinder cover, an upper cylinder, a middle plate, a lower cylinder and a lower cylinder cover;

go up the cylinder cap with set up one respectively on the lower cylinder cap the enhanced vapor injection runner, the enhanced vapor injection runner in the last cylinder cap with the top surface intercommunication of the high pressure side of the inner chamber of last cylinder, the enhanced vapor injection runner in the lower cylinder cap with the bottom surface intercommunication of the high pressure side of the inner chamber in the lower cylinder.

9. The enhanced vapor injection channel of compressor as claimed in any one of claims 1 to 8, wherein the cylinder comprises a vane slot, the angle between the enhanced vapor injection channel and the vane slot is k, and k is 60 ° or more and less than 135 ° or less.

10. A pump body of a compressor, wherein the pump body comprises the enhanced vapor injection flow channel according to any one of claims 1 to 9, a cylinder and a piston, the cylinder has an inner cavity, the inner cavity comprises a top surface, a bottom surface and a cylindrical side surface, the cylinder is provided with an exhaust port and an intake port, the inner cavity is divided into a high pressure side and a low pressure side by a vane, the exhaust port is located at the high pressure side, the intake port is located at the low pressure side, and the piston is installed in the inner cavity;

the enhanced vapor injection runner comprises a first air inlet channel, a check valve and a second air inlet channel, the check valve comprises an air injection port, and a refrigerant flows from the inner side of the air injection port to the outer side of the air injection port; one end of the first air inlet channel is communicated with an air injection reservoir, and the other end of the first air inlet channel is communicated with the inner side of an air injection port of the check valve; one end of the second air inlet channel is communicated with the outer side of the air injection port of the check valve, and the other end of the second air inlet channel is communicated with the top surface or the bottom surface of the high-pressure side of the inner cavity of the air cylinder.

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