Patent Description:
In the related art, a double-cylinder compressor means that two cylinders are disposed in an axial direction of a crankshaft, and processes of suction, compression and exhausting of a refrigerant can be realized in both cylinders, and the refrigerant is discharged out of a housing through different air outlet channels, thereby realizing double-pressure exhausting of the compressor.

However, in view of the factors such as processing convenience and assembly simplicity, the displacement of each cylinder of the current double-cylinder compressor is equal. However, under the demand for the compressor with double exhaust pressures, condenser temperatures corresponding to different pressure ratios are different, enthalpy differences at an inlet and an outlet are different, and corresponding flow ratesare also different. In fact, exhausting of the compressor with the equal displacement cannot fully utilize double exhaust advantages, and the best effect cannot be achieved. <CIT> relates to a compressor that can compress two refrgierants at once. <CIT> relates to a dual cylinder compressor that can cope with different condensors at the same time.

Aspects of the invention are set out in the appended set of claims. The present invention aims to solve one of the technical problems existing in the prior art or the related art.

To this end, a first aspect of the present invention provides a compressor.

A second aspect of the present invention provides a refrigeration device.

In view of this, the embodiments of the first aspect of the present invention provide a compressor, which comprises a housing, wherein a first air outlet port and a second air outlet port which do not communicate with each other are disposed on the housing; a first cylinder and a first piston, wherein the first cylinder is provided with a first accommodating cavity by processing, and the first piston is eccentrically disposed in the first accommodating cavity; a second cylinder and a second piston, wherein the second cylinder is provided with a second accommodating cavity, and the second piston is eccentrically disposed in the second accommodating cavity; the inner diameter of the first cylinder is D1, an eccentric distance of the first piston relative to the first accommodating cavity is e1, the height of the first cylinder is H1, and an exhaust pressure of the first cylinder is P1;and the inner diameter of the second cylinder is D2, an eccentric distance of the second piston relative to the second accommodation cavity is e2, the height of the second cylinder is H2, and an exhaust pressure of the second cylinder is P2, wherein P1<P2, <NUM> ≤ (el × (D1-e1) × H1) ÷ (e2× (D2-e2) × H2) ≤ <NUM>.

The compressor provided by the embodiments comprises the first cylinder, the first piston, the second cylinder and the second piston, wherein the first cylinder is provided with the accommodating cavity by processing, the first piston is eccentrically disposed in the first accommodating cavity, and the second piston is eccentrically disposed in the second accommodating cavity, and the first piston can reciprocate in the first accommodating cavity, so that the first piston can realize suction, compression and exhausting of gas by changing the volume of a first working cavity. The first working cavity belongs to a part of the first accommodating cavity and is enclosed by the peripheral face of the first piston, a first slide sheet assembly and the first cylinder. The second piston can make reciprocating motion in the second accommodation cavity, thereby realizing processes of air suction, air compression and gas exhausting by changing the volume of a second working cavity. The second working cavity belongs to a part of the second accommodation cavity and is enclosed by the peripheral surface of the second piston, the second slide sheet assembly and the inner surface of the second cylinder. The two cylinders and two pistons are disposed to realize a double exhaust function, and both the first cylinder and the second cylinder can realize the processes of suction, compression and exhausting of a refrigerant. The arrangement mode avoids the problem of high cost caused by arranging multiple compressors to realize the double exhaust function in the related art. One compressor in the present invention can realize the function that needs to be realized by two compressors in the related art, which reduces processing cost and occupied space of the compressor, and is conducive to improving convenience of a compressor installation process.

In addition, the exhaust pressures of the first cylinder and the second cylinder in the present invention are defined to be different, which can make the time for the refrigerant to reach a predetermined temperature and required energy be different. It can be understood that the first cylinder and the second cylinder realize different exhaust pressures according to the different use requirements of the compressor, so that condensers corresponding to the first cylinder and the second cylinder can efficiently realize a condensation function, energy wasting is avoided, double exhaust advantages of the double-cylinder compressor are fully used, and the energy efficiency of the compressor is significantly improved.

In addition, by limiting P1<P2, the purpose of different exhaust pressures of the first cylinder and the second cylinder is achieved. By limiting the inner diameter of the first cylinder to be different from that of the second cylinder, the eccentric distance of the first piston relative to the first accommodating cavity is different from that of the second piston relative to the second accommodating cavity, the height of the first cylinder is different from that of the second cylinder, and the specific range is <NUM> ≤ (e1× (D1-e1) × H1) ÷ (e2× (D2-e2) × H2) ≤ <NUM>, which can realize that the exhaust pressure of the first cylinder is different from that of the second cylinder, and meanwhile, the displacement of the first cylinder is different from that of the second cylinder, so that condensers corresponding to the first cylinder and the second cylinder can efficiently realize a condensation function, energy wasting is avoided, double exhaust advantages of the double-cylinder compressor are fully used, and the energy efficiency of the compressor and refrigeration device applying the compressor is significantly improved.

It should be noted that the eccentric distance of the first piston relative to the first accommodation cavity in the present invention is the eccentric distance of the first piston relative to a center line of the first accommodation cavity by default, and an extension direction of the center line is the same as an axial direction of a crankshaft. The eccentric distance of the second piston relative to the second accommodation cavity is the eccentric distance of the second piston relative to a center line of the second accommodation cavity by default, and an extension direction of the center line is the same as the axial direction of the crankshaft. The first accommodating cavity is cylindrical or roughly cylindrical, and the second accommodating cavity is cylindrical or roughly cylindrical.

In a possible design, the compressor further comprises a first bearing and a second bearing, wherein the first bearing and the second bearing are distributed at an interval, and the first cylinder and the second cylinder are positioned between the first bearing and the second bearing; a diaphragm assembly located between the first cylinder and the second cylinder; a first slide sheet assembly disposed in the first accommodating cavity, wherein the first slide sheet assembly, the peripheral surface of the first piston and the inner surface of the first cylinder enclose a first working cavity; a second slide sheet assembly disposed in the second accommodating cavity, wherein the second slide sheet assembly, the peripheral surface of the second piston and the inner surface of the second cylinder enclose a second working cavity; and a first exhaust outlet and a second exhaust outlet, wherein the first working cavity is communicated with the first air outlet port through the first exhaust outlet, and the second working cavity is communicated with the second air outlet port through the second exhaust outlet.

In the design, the compressor also comprises a first bearing, a second bearing and a diaphragm assembly, wherein the first bearing can support the crankshaft, and the second bearing can support the first cylinder and the second cylinder, thus improving the installation stability of the first cylinder and the second cylinder. The diaphragm assembly is disposed between the first cylinder and the second cylinder, which are also disposed between the first bearing and the second bearing, so that the first bearing and the diaphragm assembly can block the first accommodation cavity of the first cylinder between them, and the second bearing and diaphragm assembly can block the second accommodation cavity of the second cylinder between them. The first slide sheet assembly, the peripheral surface of the first piston and the inner surface of the first cylinder enclose the first working cavity, while the second slide sheet assembly, the peripheral surface of the second piston and the inner surface of the second cylinder enclose the second working cavity. By motion, the first piston can change the volume of the first working cavity to compress gas. By motion, the second piston can change the volume of the second working cavity to compress gas. The compressor further comprises the first exhaust outlet and the second exhaust outlet, wherein the first exhaust outlet is communicated with the first working cavity and the first air outlet port, and the second exhaust outlet is communicated with the second working cavity and the second air outlet port.

Further, the first bearing and the diaphragm assembly abut against the first cylinder, and the second bearing and the diaphragm assembly abut against the second cylinder.

In a possible design, the first exhaust outlet is communicated with the first air outlet port through the inner cavity of the housing, or the second exhaust outlet is communicated with the second air outlet port through the inner cavity of the housing. Further, the first exhaust outlet is disposed on the first cylinder or the first bearing or the diaphragm assembly; and the second exhaust outlet is disposed on the second cylinder or the second bearing or the diaphragm assembly.

In the design, the first exhaust outlet is communicated with the first air outlet port through the inner cavity of the housing, so that gas in the first working cavity is discharged through the first exhaust outlet, diffused into the inner cavity of the housing and then discharged through the first air outlet port. The exhaust pressure of the first cylinder is less than that of the second cylinder, so that the gas pressure in the inner cavity of the housing is relatively low, which is convenient for the compressor to get oil returned and beneficial to ensuring the reliability of compressor running.

Of course, it is also possible to make the second exhaust outlet communicate with the second air outlet port through the inner cavity of the housing, so that gas in the second working cavity will be diffused into the inner cavity of the housing after being discharged through the second exhaust outlet, and then be discharged through the second air outlet port.

In addition, the first exhaust outlet may be disposed on the first cylinder or the first bearing or the diaphragm assembly; and the second exhaust outlet may also be disposed on the second cylinder or the second bearing or the diaphragm assembly.

It should be noted that in the present invention, the inner cavity of the housing refers to spare space in the housing.

In a possible design, the compressor further comprises a first seal and a first air outlet channel, wherein the first seal and the first bearing enclose a first exhaust cavity, and the first exhaust outlet is communicated with the first exhaust cavity; the first air outlet channel penetrates through the first bearing, the first cylinder, the diaphragm assembly, the second cylinder and the second bearing and is communicated with the inner cavity of the housing; a second seal and a second air outlet channel, wherein the second seal and the second bearing enclose a second exhaust cavity, the second exhaust outlet is communicated with the second exhaust cavity, the second exhaust channel penetrates through the second bearing, the second cylinder and the diaphragm assembly and is communicated with the second air outlet port through an exhaust channel on the first cylinder.

In the design, the compressor further comprises a first seal, a first air outlet channel, a second seal and a second air outlet channel, wherein the first seal and the first bearing enclose a first exhaust cavity, and the second seal and the second bearing enclose a second exhaust cavity. The first working cavity is communicated with the first air outlet channel, and the first air outlet channel penetrates through the first bearing, the first cylinder, the diaphragm assembly, the second cylinder and the second bearing, and then is communicated with the inner cavity of the housing, so that gas in the first working cavity can reach the side where the second cylinder is located through the first air outlet channel, and is then diffused into the inner cavity of the housing to communicate with the first air outlet port. By communicating the second working cavity with the second air outlet channel which is made to penetrate through the second bearing, the second cylinder and the diaphragm assembly, and then communicate with the second air outlet port through the exhaust channel on the first cylinder, it is realized that gas in the second working cavity moves to the position where the first cylinder is located through the second air outlet channel and is discharged to the second air outlet port through an exhaust channel on the first cylinder.

Further, the first seal and the second seal are cover plates or silencers, which are connected at other positions by bolts or welding.

In a possible design, the compressor further comprises a first exhaust valve disposed on the first air outlet channel; and a second exhaust valve disposed on the second air outlet channel. The first exhaust valve can conduct and block the first air outlet channel, and the second exhaust valve can conduct and block the second air outlet channel.

In a possible design, the housing is provided with an air suction port, and the compressor further comprises a first air suction channel and a second air suction channel, wherein the first working cavity is communicated with the air suction port through the first air suction channel, and the second working cavity is communicated with the air suction port through the second air suction channel. Further, the first air suction channel and the second air suction channel are communicated with each other.

In the design, an air suction port may be disposed on the housing, so that both the first working cavity and the second working cavity communicate with one air suction port. Specifically, the first working cavity is communicated with the air suction port through a first air suction channel, and the second working cavity is communicated with the air suction port through a second air suction channel, and the first air suction channel and the second air suction channel are optionally communicated with each other, so that the total length of the air suction channel is reduced, the rigidity is prevented from being influenced by over-machining parts such as cylinders and bearings, and the production cost is reduced.

In another possible design, the housing is provided with two air suction ports, and the compressor further comprises a first air suction channel and a second air suction channel, wherein the first working cavity is communicated with one air suction port through the first air suction channel, and the second working cavity is communicated with the other air suction port through the second air suction channel. Further, the first air suction channel and the second air suction channel do not communicate with each other.

In the design, by setting the two air suction ports on the housing and making one working cavity communicate with one air suction port, the gases in the two air suction channels will not be mixed with each other, which is beneficial to ensure the suction amount of each cylinder.

In a possible design, the first air suction channel is disposed on the first cylinder or the first bearing or the diaphragm assembly; and the second air suction channel is disposed on the second cylinder or the second bearing or the diaphragm assembly.

Further, the first air suction channel is disposed on the first cylinder, and gas enters the first working cavity through the first air suction channel and is compressed in the first working cavity. Similarly, the first air suction channel can also be disposed on the first bearing, and the gas enters the first working cavity through the first air suction channel on the first bearing, thus realizing the process of sucking the gas into the first working cavity. The second air suction channel is disposed on the second cylinder, and the gas enters the second working cavity through the second air suction channel and is compressed in the second working cavity. Similarly, the second air suction channel can also be disposed on the second bearing, and the gas enters the second working cavity through the second air suction channel on the second bearing, thus realizing the process of sucking the gas into the second working cavity.

In a possible design, the first slide sheet assembly comprises a first slide sheet and a first elastic part, wherein the first elastic part is used for pushing the first slide sheet to press the peripheral surface of the first piston; or the first slide sheet component comprises a first slide sheet, and the first slide sheet and the first piston are an integrated structure; or the first slide sheet and the first piston are hinged.

In the design, the first slide sheet assembly comprises a first slide sheet and a first elastic part, wherein the first slide sheet presses the peripheral surface of the first piston, and the first elastic part is connected with the end of the first slide sheet which is far away from the first piston, so that the first elastic part can push the first slide sheet to press the peripheral surface of the first piston all the time during the motion of the first piston, thus ensuring the tightness of the first working cavity. Or, the first slide sheet assembly comprises a first slide sheet, and the first slide sheet can be integrated with the first piston, which can prevent the first slide sheet from falling out of a first slide sheet slot, ensure the stable installation of the first slide sheet, and improve the reliability of the product. Moreover, the integrated structure has good mechanical properties, so the connection strength between the first slide sheet and the first piston can be improved. In addition, the first slide sheet and the first piston are integrally made, which is beneficial to mass production, improves the processing efficiency of a product and reduces the processing cost of the product.

Of course, the first slide sheet can also be hinged with the first piston, which can also play a role in preventing the first slide sheet from falling out of the first slide sheet slot, thereby stabilizing the installation of the first slide sheet and improving the reliability of the product.

In a possible design, the second slide sheet assembly comprises a second slide sheet and a second elastic part, wherein the second elastic part is used for pushing the second slide sheet to press the peripheral surface of the second piston. Or the second slide sheet assembly comprises a second slide sheet, wherein the second slide sheet and the second piston are an integrated structure or the second slide sheet and the second piston are hinged.

In the design, the second slide sheet assembly comprises a second slide sheet and a second elastic part, wherein the second slide sheet presses the peripheral surface of the second piston, and the second elastic part is connected with the end of the second slide sheet which is far away from the second piston, so that the second elastic part can push the second slide sheet to press the peripheral surface of the second piston all the time during the motion of the second piston, thus ensuring the tightness of the second working cavity. Or, the second slide sheet assembly comprises a second slide sheet, and the second slide sheet can be integrated with the second piston, which can prevent the second slide sheet from falling out of a second slide sheet slot, ensure the stable installation of the second slide sheet, and improve the reliability of the product. Moreover, the integrated structure has good mechanical properties, so the connection strength between the second slide sheet and the second piston can be improved. In addition, the second slide sheet and the second piston are integrally manufactured, which is beneficial to mass production, improves the processing efficiency of the product and reduces the processing cost of the product. Of course, the second slide sheet can also be hinged with the second piston, which can also play a role in preventing the second slide sheet from falling out of the second slide sheet slot, thereby stabilizing the installation of the second slide sheet and improving the reliability of the product.

In a possible design, the compressor further comprises a crankshaft with a first eccentric part and a second eccentric part, wherein the first piston is connected with the first eccentric part and the second piston is connected with the second eccentric part; and a motor assembly which is connected with the crankshaft to drive the crankshaft to rotate.

In the design, the compressor further comprises a crankshaft and a motor assembly, which can drive the crankshaft to rotate, and the first eccentric part on the crankshaft is connected with the first piston, so that when the crankshaft rotates, the first eccentric part on the crankshaft drives the first piston to rotate, and the rotating first piston realizes functions of sucking, compressing and discharging gas. Similarly, the second eccentric part on the crankshaft is connected with the second piston, so that when the crankshaft rotates, the second eccentric part on the crankshaft drives the second piston to rotate, and the rotating second piston realizes the functions of sucking, compressing and discharging the gas.

The embodiments of the second aspect of the present invention propose refrigeration device, which comprises the compressor according to any of the above embodiments, so the refrigeration device provided by the present invention has all the benefits of the compressor provided in any of the above embodiments.

In a possible design, the refrigeration device further comprises a first condenser communicated with the first air outlet port of the compressor; a first throttling part communicated with the first condenser; a first evaporator communicated with the first throttling part; a first reservoir communicated with the first evaporator and the first air suction channel of the compressor; a second condenser communicated with a second air outlet port of the compressor; a second throttling part communicated with the second condenser; a second evaporator communicated with the second throttling part; and a second reservoir communicated with the second evaporator and the second air suction channel of the compressor.

In the design, the compressor, the first condenser, the first throttling part, the first evaporator and the first reservoir form a first set of refrigeration system, while the compressor, the second condenser, the second throttling part, the second evaporator and the second reservoir form a second set of refrigeration system. The two independent refrigeration systems, i.e., the refrigeration device realizes multi-exhaust functions realized by multiple compressors in the related art through one compressor, which reduces the processing cost of the refrigeration device and also reduces the occupied space of refrigeration device, and improves the convenience of installing internal components of refrigeration device. Due to the different exhaust pressures of the first cylinder and the second cylinder, the exhaust pressures reaching the first condenser and the second condenser are different, which can make the refrigeration device have double condensation temperatures and double evaporation temperatures. It is beneficial to realizing cascade utilization of energy and improving the energy efficiency of refrigeration device. Especially, under the condition that the displacements of the first cylinder and the second cylinder are different, the amounts of refrigerant condensed by the first condenser and the second condenser are different, and the energy efficiency of refrigeration device is further improved.

In a possible design, the refrigeration device further comprises a third condenser communicated with the first air outlet port of the compressor; a third throttling part communicated with the third condenser; a third evaporator communicated with the third throttling part; a third reservoir communicating the first air suction channel and the second air suction channel of the third evaporator and the compressor; a fourth condenser communicated with the second air outlet port of the compressor; a fourth throttling part communicated with the fourth condenser; a fourth evaporator communicated with the fourth throttling part; and the third reservoir is also communicated with the first air suction channel and the second air suction channel of the fourth evaporator and the compressor.

In the design, the compressor, the third condenser, the third throttling part, the third evaporator and the third reservoir form a third set of refrigeration system, while the compressor, the fourth condenser, the fourth throttling part, the fourth evaporator and the third reservoir form a fourth set of refrigeration system. The two independent refrigeration systems, i.e., the refrigeration device realizes the multi-exhaust function realized by multiple compressors in the related art through one compressor, which reduces the processing cost of the refrigeration device and also reduces the occupied space of refrigeration device, and improves the convenience of installing internal components of refrigeration device. The first air suction channel and the second air suction channel communicate with the third reservoir, so that arrangement of one reservoir can meet the suction functions of the first cylinder and the second cylinder, the number of components in the refrigeration device is reduced, the processing cost of the refrigeration device is further reduced, the volume of the refrigeration device is effectively reduced, and the convenience in the installation of the refrigeration device is increased. Furthermore, due to the different exhaust pressures of the first cylinder and the second cylinder, the exhaust pressures reaching the third condenser and the fourth condenser are different, which can make the refrigeration device have double condensation temperatures and double evaporation temperatures, which is beneficial to realizing the cascade utilization of energy and improving the energy efficiency of the refrigeration device. Especially, under the condition that the displacements of the first cylinder and the second cylinder are different, the amounts of refrigerant condensed by the third condenser and the fourth condenser are different, and the energy efficiency of the refrigeration device is further improved.

Additional aspects and advantages of the present invention will become apparent in the following description, or may be learned by practice of the present invention.

The above and/or additional aspects and advantages of the present invention would become apparent and understandable in the description of embodiments in combination with the following figures, wherein:.

Wherein: corresponding relationships between drawing marks and component names in <FIG> is are follows:
<NUM> first cylinder, <NUM> first piston, <NUM> second cylinder, <NUM> second piston, <NUM> housing, <NUM> first air outlet port, <NUM> second air outlet port, <NUM> air suction port, <NUM> first bearing, <NUM> second bearing, <NUM> diaphragm assembly, <NUM> first diaphragm, <NUM> second diaphragm, <NUM> first exhaust outlet, <NUM> second exhaust outlet, <NUM> first air outlet channel, <NUM> second air outlet channel, <NUM> first air suction channel, <NUM> second air suction channel, <NUM> first seal, <NUM> first exhaust cavity, <NUM> second seal, <NUM> second exhaust cavity, <NUM> crankshaft, <NUM> motor assembly, <NUM> first slide sheet assembly, <NUM> second slide sheet assembly, <NUM> first condenser, <NUM> first evaporator, <NUM> first reservoir, <NUM> second condenser, <NUM> second evaporator, <NUM> second reservoir, <NUM> first throttling part, <NUM> second throttling part, <NUM> third condenser, <NUM> third evaporator, <NUM> third reservoir, <NUM> fourth condenser and <NUM> fourth evaporator.

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, the present disclosure is described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and the features in the embodiments herein may be combined with one another without conflict.

However, the present disclosure may be practiced otherwise than as described herein. Therefore, the scope of the present disclosure is not limited to the specific embodiments disclosed below.

A compressor and refrigeration device according to some embodiments of the present invention will be described below with reference to <FIG>.

A compressor, as shown in <FIG>, comprises a housing <NUM>, a first cylinder <NUM>, a first piston <NUM>, a second cylinder <NUM> and a second piston <NUM>. The housing <NUM> is provided with a first air outlet port <NUM> and a second air outlet port <NUM> which do not communicate with each other. The first cylinder <NUM> is provided with an accommodating cavity by processing, the first piston <NUM> is eccentrically disposed in the first accommodating cavity, the second cylinder <NUM> is also provided with an accommodating cavity, the second piston <NUM> is eccentrically disposed in the second accommodating cavity, and the first piston <NUM> can reciprocate in the first accommodating cavity, so that the first piston <NUM> can realize the processes of air suction, air compression and gas exhausting by changing the volume of the first working cavity, wherein the first working cavity belongs to a part of the first accommodating cavity and is enclosed by the peripheral face of the first piston <NUM>, a first slide sheet assembly <NUM> and the first cylinder <NUM>. The second piston <NUM> can reciprocate in the second accommodation cavity, so that the second piston <NUM> can realize the processes of air suction, air compression and gas exhausting by changing the volume of a second working cavity. The second working cavity belongs to a part of the second accommodation cavity and is enclosed by the peripheral surface of the second piston <NUM>, the second slide sheet assembly <NUM> and the inner surface of the second cylinder <NUM>. The first cylinder <NUM> exhausts gas through a first air outlet port <NUM> and the second cylinder <NUM> exhausts gas through a second air outlet port <NUM>. A double exhaust function is realized by arranging the two cylinders and two pistons, and both the first cylinder <NUM> and the second cylinder <NUM> can realize the processes of suction, compression and exhausting of a refrigerant. The arrangement mode avoids the problem of high cost caused by arranging multiple compressors to realize the double exhaust function in the related art. One compressor in the present invention can realize the function that needs to be realized by two compressors in the related art, which reduces processing cost and occupied space of the compressor, and is conducive to improving convenience of a compressor installation process.

In addition, the exhaust pressures of the first cylinder <NUM> and the second cylinder <NUM> in the present invention are defined to be different, which can make the time for the refrigerant to reach a predetermined temperature and required energy be different. It can be understood that the first cylinder <NUM> and the second cylinder <NUM> realize different exhaust pressures according to the different use requirements of the compressor, so that condensers corresponding to the first cylinder <NUM> and the second cylinder <NUM> can efficiently realize a condensation function, energy wasting is wasted, double exhaust advantages of the double-cylinder compressor are fully used, and the energy efficiency of the compressor is significantly improved.

Further, in the present embodiment, P1<P2, <NUM> ≤ (e1× (D1-e1) × H1) ÷ (e2× (D2-e2) × H2) ≤ <NUM> are defined. Specifically, the value of (e1×(D1-e1)×H1)÷(e2×(D2-e2)×H2) can be <NUM>, <NUM> and <NUM>. P1 is the exhaust pressure of the first cylinder <NUM>, D1 is the inner diameter of first cylinder <NUM>, e1 is the eccentric distance of first piston <NUM> relative to first cylinder <NUM>, H1 is the height of first cylinder <NUM>, P2 is the exhaust pressure of second cylinder <NUM>, D2 is the inner diameter of second cylinder <NUM>, e2 is the eccentric distance of second piston <NUM> relative to second cylinder <NUM>, and H2 is the height of second cylinder <NUM>. The ratio of e1×(D1-e1)×H1 to e2×(D2-e2)×H2 represents the ratio of the displacement of the first cylinder <NUM> to that of the second cylinder <NUM>.

As shown in <FIG> and <FIG>, the present invention defines that P1<P2, and the purpose of different exhaust pressures of the first cylinder <NUM> and the second cylinder <NUM> is achieved. By limiting that the inner diameter of the first cylinder <NUM> to be different from that of the second cylinder <NUM>, the eccentric distance of the first piston <NUM> relative to the first accommodating cavity is different from that of the second piston <NUM> relative to the second accommodating cavity, the height of the first cylinder <NUM> is different from that of the second cylinder <NUM>, and the specific range is <NUM> ≤ (e1× (D1-e1) × H1) ÷ (e2× (D2-e2) × H2) ≤ <NUM>, which can realize that the exhaust pressure of the first cylinder <NUM> is different from that of the second cylinder <NUM>, and meanwhile, the displacement of the first cylinder <NUM> is different from that of the second cylinder <NUM>, so that condensers corresponding to the first cylinder <NUM> and the second cylinder <NUM> can efficiently realize a condensation function, and energy wasting is avoided.

<FIG> is a schematic diagram showing a change curve of energy efficiency under different ratios of displacements. It can be seen from <FIG> that with the increase of the displacement ratio, the energy efficiency tends to increase at first and then decrease. Therefore, it can be seen that making full use of double exhaust advantages of the double-cylinder compressor can significantly improve the energy efficiency of the compressor and the refrigeration device using the compressor.

It should be noted that the eccentric distance of the first piston <NUM> relative to the first accommodation cavity in the present invention is the eccentric distance of the first piston <NUM> relative to a center line of the first accommodation cavity by default, and an extension direction of the center line is the same as an axial direction of a crankshaft <NUM>. The eccentric distance of the second piston <NUM> relative to the second accommodation cavity is the eccentric distance of the second piston <NUM> relative to a center line of the second accommodation cavity by default, and an extension direction of the center line is the same as the axial direction of the crankshaft <NUM>. The first accommodating cavity is cylindrical or roughly cylindrical, and the second accommodating cavity is cylindrical or roughly cylindrical.

In addition, in the related art, in view of the factors such as acting objects, processing convenience and assembly simplicity, the displacement of each cylinder of the current double-cylinder compressor is equal. However, in the present invention, due to different exhaust pressures of the first cylinder <NUM> and the second cylinder <NUM>, condenser temperatures corresponding to different pressure ratios are different, enthalpy differences at an inlet and an outlet are different, and corresponding flow rates are also different, so that the advantages of double exhaust can be fully utilized to achieve the best effect.

With reference to <FIG>, <FIG> and <FIG>, on the basis of Embodiment <NUM>, it is further defined that the compressor further comprises a first bearing <NUM>, a second bearing <NUM>, a diaphragm assembly <NUM>, a first exhaust outlet <NUM>, a second exhaust outlet <NUM>, a first slide sheet assembly <NUM> and a second slide sheet assembly <NUM>.

The first bearing <NUM> and the second bearing <NUM> are disposed at an interval, and the first cylinder <NUM> and the second cylinder <NUM> are located between the first bearing <NUM> and the second bearing <NUM>. The first bearing <NUM> can support the crankshaft <NUM>, and the second bearing <NUM> can support the first cylinder <NUM> and the second cylinder <NUM>, thus improving the installation stability of the first cylinder <NUM> and the second cylinder <NUM>.

The diaphragm assembly <NUM> is disposed between the first cylinder <NUM> and the second cylinder <NUM>, which are also disposed between the first bearing <NUM> and the second bearing <NUM>, so that the first bearing <NUM> and the diaphragm assembly <NUM> can block the first accommodation cavity of the first cylinder <NUM> between them, and the second bearing <NUM> and diaphragm assembly <NUM> can block the second accommodation cavity of the second cylinder <NUM> between them.

The first slide sheet assembly <NUM>, the peripheral surface of the first piston <NUM> and the inner surface of the first cylinder <NUM> enclose the first working cavity, while the second slide sheet assembly <NUM>, the peripheral surface of the second piston <NUM> and the inner surface of the second cylinder <NUM> enclose the second working cavity. By motion, the first piston <NUM> can change the volume of the first working cavity to compress gas. By motion, the second piston <NUM> can change the volume of the second working cavity to compress gas. The compressor further comprises the first exhaust outlet <NUM> and the first exhaust outlet <NUM>, wherein the first exhaust outlet <NUM> is communicated with the first working cavity and the first air outlet port <NUM>, and the first exhaust outlet <NUM> is communicated with the second working cavity and the second air outlet port <NUM>, thus realizing the double-pressure exhaust function of the compressor.

Further, the first bearing <NUM> and the diaphragm assembly <NUM> abut against the first cylinder <NUM>, and the second bearing <NUM> and the diaphragm assembly <NUM> abut against the second cylinder <NUM>. The first working cavity is communicated with the first air outlet port <NUM> through the first exhaust outlet <NUM>, and the second working cavity is communicated with the second air outlet port <NUM> through the second exhaust outlet <NUM>.

Further, the first exhaust outlet <NUM> is disposed on the first cylinder <NUM> or the first bearing <NUM> or the diaphragm assembly <NUM>; the second exhaust outlet <NUM> is disposed on the second cylinder <NUM> or the second bearing <NUM> or the diaphragm assembly <NUM>; and the first exhaust outlet <NUM> is communicated with the first air outlet port <NUM> through the inner cavity of the housing <NUM>, or the second exhaust outlet <NUM> is communicated with the second air outlet port <NUM> through the inner cavity of the housing <NUM>.

In a specific embodiment, the first exhaust outlet <NUM> is disposed on the first cylinder <NUM>, so that compressed gas in the first working cavity is exhausted through the first exhaust outlet <NUM>; and the second exhaust outlet <NUM> is disposed on the second cylinder <NUM>, so that compressed gas in the second working cavity is exhausted through the second exhaust outlet <NUM>, which is convenient for exhausting the first working cavity and the second working cavity.

In another specific embodiment, the first exhaust outlet <NUM> and the second exhaust outlet <NUM> may also be disposed on the first bearing <NUM> and the second bearing <NUM>, respectively.

As shown in <FIG>, in a specific embodiment, the first bearing <NUM> is provided with a first exhaust outlet <NUM>, so that compressed air in the first working cavity penetrates through the first exhaust outlet <NUM> on the first bearing <NUM>. The second bearing <NUM> is provided with a second exhaust outlet <NUM>, so that the compressed air in the second working cavity penetrates through the second exhaust outlet <NUM> on the second bearing <NUM>. Since the first bearing <NUM> and the second bearing <NUM> are located on both sides of the two cylinders and are far away from each other, mutual influences of the exhaust processes of the first cylinder <NUM> and the second cylinder <NUM> are effectively avoided, and the double-pressure exhaust function of the compressor is realized.

As shown in <FIG>, in another specific embodiment, the diaphragm assembly <NUM> comprises a first diaphragm <NUM> and a second diaphragm <NUM> which enclose a cavity, so that a second exhaust outlet <NUM> can be disposed on the second diaphragm <NUM>, and compressed air in the second working cavity can be discharged into the cavity of the diaphragm assembly <NUM> through the second exhaust outlet <NUM>. Then, the compressed air is discharged to the second air outlet port <NUM> through a second air outlet channel <NUM>. At this time, the first bearing <NUM> is provided with the first exhaust outlet <NUM>, and compressed air in the first working cavity can be discharged to the first air outlet port <NUM> through the first exhaust outlet <NUM>, thus ensuring that the first cylinder <NUM> and the second cylinder <NUM> can realize an independent exhaust function and realize the double-pressure exhaust function of the compressor.

As shown in <FIG>, in yet another specific embodiment, the diaphragm assembly <NUM> comprises a first diaphragm <NUM> and a second diaphragm <NUM> which enclose a cavity, so that a first exhaust outlet <NUM> can be disposed on the first diaphragm <NUM>, and compressed air in the first working cavity can be discharged into the cavity of the diaphragm assembly <NUM> through the first exhaust outlet <NUM>. Then, the compressed air is discharged to the first air outlet port <NUM> through a first air outlet channel <NUM>. At this time, the second bearing <NUM> is provided with the second exhaust outlet <NUM>, and compressed air in the second working cavity can be discharged to the second air outlet port <NUM> through the second exhaust outlet <NUM>, thus ensuring that the first cylinder <NUM> and the second cylinder <NUM> can realize an independent exhaust function and realize the double-pressure exhaust function of the compressor.

In another specific embodiment, the diaphragm assembly <NUM> comprises a first diaphragm <NUM>, a second diaphragm <NUM> and a diaphragm, and the diaphragm separates cavities in the first diaphragm <NUM> and the second diaphragm <NUM>, thereby separating the cavities into two mutually independent cavities. At this time, the first diaphragm <NUM> may be provided with the first exhaust outlet <NUM>, so that the compressed air in the first working cavity can be discharged to one of the cavities through the first exhaust outlet <NUM>, and then discharged to the first air outlet port <NUM> through the first air outlet channel <NUM>, or discharged to the first air outlet port <NUM> through the inner cavity of the housing <NUM>. The second diaphragm <NUM> may also be provided with the second exhaust outlet <NUM>, through which compressed air in the second working cavity is discharged to the other cavity, and then the compressed air is discharged to the second air outlet port <NUM> through the inner cavity of the housing <NUM> or discharged to the second air outlet port <NUM> through the second air outlet channel <NUM>. It ensures that the exhausting processes of the first cylinder <NUM> and the second cylinder <NUM> do not affect each other, and realizes the double-pressure exhaust function of the compressor.

As shown in <FIG>, <FIG> and <FIG>, in another specific embodiment, the compressor further comprises a first seal <NUM> and a first air outlet channel <NUM>, wherein the first seal <NUM> and the first bearing <NUM> enclose a first exhaust cavity <NUM>, and the first exhaust outlet <NUM> is communicated with the first exhaust cavity <NUM>; the first air outlet channel <NUM> penetrates through the first bearing <NUM>, the first cylinder <NUM>, the diaphragm assembly <NUM>, the second cylinder <NUM> and the second bearing <NUM> and is communicated with the inner cavity of the housing <NUM>; a second seal <NUM> and a second air outlet channel <NUM>, wherein the second seal <NUM> and the second bearing <NUM> enclose a second exhaust cavity <NUM>, the first exhaust outlet <NUM> is communicated with the second exhaust cavity <NUM>, the second air outlet channel <NUM> penetrates through the second bearing <NUM>, the second cylinder <NUM> and the diaphragm assembly <NUM> and is communicated with the second air outlet port <NUM> through an exhaust channel on the first cylinder <NUM>.

In the present embodiment, the compressor further comprises a first seal <NUM> and a second seal <NUM>, wherein the first seal <NUM> and the first bearing <NUM> enclose a first exhaust cavity <NUM>, and the second seal <NUM> and the second bearing <NUM> enclose a second exhaust cavity <NUM>. The first working cavity is communicated with the first air outlet channel <NUM>, and the first air outlet channel <NUM> penetrates through the first bearing <NUM>, the first cylinder <NUM>, the diaphragm assembly <NUM>, the second cylinder <NUM> and the second bearing <NUM>, and then is communicated with the inner cavity of the housing <NUM>, so that gas in the first working cavity can reach the side where the second cylinder <NUM> is located through the first air outlet channel <NUM>, and is then diffused into the inner cavity of the housing <NUM> to communicate with the first air outlet port <NUM>. By communicating the second working cavity with the second air outlet channel <NUM> which is made to penetrate through the second bearing <NUM>, the second cylinder <NUM> and the diaphragm assembly <NUM>, and then communicate with the second air outlet port <NUM> through the exhaust channel on the first cylinder <NUM>, it is realized that gas in the second working cavity moves to the position where the first cylinder <NUM> is located through the second air outlet channel <NUM> and is discharged to the second air outlet port <NUM> through an exhaust channel on the first cylinder <NUM>.

Further, the first seal <NUM> and the second seal <NUM> are cover plates or silencers, which are connected at other positions by bolts or welding.

In another specific embodiment, the compressor further comprises a first seal <NUM> and a second seal <NUM>. The first seal <NUM> and the first bearing <NUM> enclose the first exhaust cavity <NUM>, the first working cavity is communicated with the first exhaust cavity <NUM>, the second seal <NUM> and the second bearing <NUM> enclose the second exhaust cavity <NUM>, and the second working cavity is communicated with the second exhaust cavity <NUM>. The first air outlet channel <NUM> penetrates through the first bearing <NUM>, the first cylinder <NUM> and the diaphragm assembly <NUM>, and is communicated with the second air outlet port <NUM> through the exhaust channel on the second cylinder <NUM>. The second air outlet channel <NUM> penetrates through the second bearing <NUM>, the second cylinder <NUM>, the diaphragm assembly <NUM>, the first cylinder <NUM> and the first bearing <NUM>, and is communicated with the inner cavity of the housing <NUM>.

Further, the compressor further comprises lift limiters disposed on the first bearing <NUM> and the second bearing <NUM>, which can limit exhaust speeds of the first air outlet channel <NUM> and the second air outlet channel <NUM>. A first exhaust valve <NUM> is disposed on the first air outlet channel <NUM>; and a second exhaust valve is disposed on the second air outlet channel <NUM>.

As shown in <FIG>, on the basis of Embodiment <NUM>, it is further defined that the housing <NUM> is provided with an air suction port <NUM>, and the compressor further comprises a first air suction channel <NUM> and a second air suction channel <NUM>, wherein the first working cavity is communicated with the air suction port <NUM> through the first air suction channel <NUM>, and the second working cavity is communicated with the air suction port <NUM> through the second air suction channel <NUM>. Further, the first air suction channel <NUM> and the second air suction channel <NUM> are communicated with each other.

In the embodiment, an air suction port <NUM> may be disposed on the housing <NUM>, so that both the first working cavity and the second working cavity communicate with one air suction port <NUM>. Specifically, the first working cavity is communicated with the air suction port <NUM> through a first air suction channel <NUM>, and the second working cavity is communicated with the air suction port <NUM> through a second air suction channel <NUM>, and the first air suction channel <NUM> and the second air suction channel <NUM> are optionally communicated with each other, so that the total length of the air suction channel is reduced, the rigidity is prevented from being influenced by over-machining parts such as cylinders and bearings, and the production cost is reduced.

As shown in <FIG>, on the basis of Embodiment <NUM>, it is further defined that the housing <NUM> is provided with two air suction port <NUM>, and the compressor further comprises a first air suction channel <NUM> and a second air suction channel <NUM>, wherein the first working cavity is communicated with one air suction port <NUM> through the first air suction channel <NUM>, and the second working cavity is communicated with the other air suction port <NUM> through the second air suction channel <NUM>. Further, the first air suction channel <NUM> and the second air suction channel <NUM> do not communicate with each other.

In the present embodiment, by setting the two air suction port <NUM> on the housing <NUM> and making one working cavity communicate with one air suction port <NUM>, the gases in the two air suction channels will not be mixed with each other, which is beneficial to ensure the suction amount of each cylinder.

On the basis of Embodiment <NUM> or the Embodiment <NUM>, it is further defined that the first air suction channel <NUM> is disposed on the first cylinder <NUM> or the first bearing <NUM> or the diaphragm assembly <NUM>; and the second air suction channel <NUM> is disposed on the second cylinder <NUM> or the second bearing <NUM> or the diaphragm assembly <NUM>.

Further, the first air suction channel <NUM> is disposed on the first cylinder <NUM>, and gas enters the first working cavity through the first air suction channel <NUM> and is compressed in the first working cavity. Similarly, the first air suction channel <NUM> can also be disposed on the first bearing <NUM>, and the gas enters the first working cavity through the first air suction channel <NUM> on the first bearing <NUM>, thus realizing the process of sucking the gas into the first working cavity. The second air suction channel <NUM> is disposed on the second cylinder <NUM>, and the gas enters the second working cavity through the second air suction channel <NUM> and is compressed in the second working cavity. Similarly, the second air suction channel <NUM> can also be disposed on the second bearing <NUM>, and the gas enters the second working cavity through the second air suction channel <NUM> on the second bearing <NUM>, thus realizing the process of sucking the gas into the second working cavity.

In a specific embodiment of the present embodiment, the first air suction channel <NUM> is disposed on the first cylinder <NUM>, and gas enters the first working cavity through the first air suction channel <NUM> to realize the process of sucking the gas into the first working cavity; and the second air suction channel <NUM> is disposed on the second cylinder <NUM> and is communicated with the second working cavity, and the gas enters the second working cavity through the second air suction channel <NUM>, thus realizing the process of sucking the gas into the second working cavity.

In another specific embodiment, the first air suction channel <NUM> is disposed on the first cylinder <NUM> and is communicated with the first working cavity, and gas enters the first working cavity through the first air suction channel <NUM> to realize the process of sucking the gas into the first working cavity; and the second air suction channel <NUM> is disposed on the second bearing <NUM> and is communicated with the second working cavity, and the gas enters the second working cavity through the second air suction channel <NUM>, thereby realizing the process of sucking the gas into the second working cavity.

In yet another specific embodiment, the first air suction channel <NUM> is disposed on the first bearing <NUM> and is communicated with the first working cavity, and gas enters the first working cavity through the first air suction channel <NUM>, thereby realizing the process of sucking the gas into the first working cavity; and the second air suction channel <NUM> is disposed on the second cylinder <NUM>, and the gas enters the second working cavity through the second air suction channel <NUM>, thereby realizing the process of sucking the gas into the second working cavity.

In another specific embodiment, the first air suction channel <NUM> is disposed on the first bearing <NUM>, and gas enters the first working cavity through the first air suction channel <NUM>, thereby realizing the process of sucking the gas into the first working cavity; and the second air suction channel <NUM> is disposed on the second bearing <NUM>, and the gas enters the second working cavity through the second air suction channel <NUM>, thereby realizing the process of sucking the gas into the second working cavity.

On the basis of any of the above embodiments, as shown in <FIG> and <FIG>, it is further defined that the first slide sheet assembly <NUM> comprises a first slide sheet and a first elastic part, wherein the first slide sheet presses the peripheral surface of the first piston <NUM>, and the first elastic part is connected with the end of the first slide sheet which is far away from the first piston <NUM>, so that the first elastic part can push the first slide sheet to press the peripheral surface of the first piston <NUM> all the time during the motion of the first piston <NUM>, thus ensuring the tightness of the first working cavity. Or, the first slide sheet assembly <NUM> comprises a first slide sheet, and the first slide sheet can be integrated with the first piston <NUM>, which can prevent the first slide sheet from falling out of a first slide sheet slot, ensure the stable installation of the first slide sheet, and improve the reliability of the product. Moreover, the integrated structure has good mechanical properties, so the connection strength between the first slide sheet and the first piston <NUM> can be improved. In addition, the first slide sheet and the first piston <NUM> are integrally made, which is beneficial to mass production, improves the processing efficiency of the product and reduces the processing cost of the product. Of course, the first slide sheet can also be hinged with the first piston <NUM>, which can also play a role in preventing the first slide sheet from falling out of the first slide sheet slot, thereby stabilizing the installation of the first slide sheet and improving the reliability of the product.

The second slide sheet assembly <NUM> comprises a second slide sheet and a second elastic part, wherein the second slide sheet presses the peripheral surface of the second piston <NUM>, and the second elastic part is connected with the end of the second slide sheet which is far away from the second piston <NUM>, so that the second elastic part can push the second slide sheet to press the peripheral surface of the second piston <NUM> all the time during the motion of the second piston <NUM>, thus ensuring the tightness of the second working cavity. Or, the second slide sheet assembly <NUM> comprises a second slide sheet, and the second slide sheet can be integrated with the second piston <NUM>, which can prevent the second slide sheet from falling out of a second slide sheet slot, ensure the stable installation of the second slide sheet, and improve the reliability of the product. Moreover, the integrated structure has good mechanical properties, so the connection strength between the second slide sheet and the second piston <NUM> can be improved. In addition, the second slide sheet and the second piston <NUM> are integrally manufactured, which is beneficial to mass production, improves the processing efficiency of the product and reduces the processing cost of the product. Of course, the second slide sheet can also be hinged with the second piston <NUM>, which can also play a role in preventing the second slide sheet from falling out of the second slide sheet slot, thereby stabilizing the installation of the second slide sheet and improving the reliability of the product.

As shown in <FIG> and <FIG>, on the basis of any of the above embodiments, it is further defined that the compressor further comprises a crankshaft <NUM> and a motor assembly <NUM>, wherein the motor assembly <NUM> comprises a stator and a rotor, the crankshaft <NUM> comprises a first eccentric part and a second eccentric part, the first piston <NUM> is connected with the first eccentric part, and the second piston <NUM> is connected with the second eccentric part; and a motor assembly <NUM> which is connected with the crankshaft <NUM> to drive the crankshaft <NUM> to rotate.

The compressor further comprises a crankshaft <NUM> and a motor assembly <NUM>. The motor assembly <NUM> can drive the crankshaft <NUM> to rotate. The crankshaft <NUM> comprises a first eccentric part connected with the first piston <NUM> and a second eccentric part connected with the second piston <NUM>. When the crankshaft <NUM> rotates, the first eccentric part on the crankshaft <NUM> drives the first piston <NUM> to rotate, and the rotating first piston <NUM> can realize the functions of sucking, compressing and discharging gas.

The second eccentric part on the crankshaft <NUM> drives the second piston <NUM> to rotate, and the rotating second piston <NUM> realizes the functions of sucking, compressing and discharging gas.

As the crankshaft <NUM> drives the first piston <NUM> and the second piston <NUM> to rotate, a stream of low-pressure gas enters the first working cavity of the first cylinder <NUM> from the first air suction channel <NUM>, and the processes of air suction, air compression and gas exhausting are completed in the first working cavity, and then the gas is exhausted through the first air outlet channel <NUM>. Another stream of low-pressure gas enters the second working cavity of the second cylinder <NUM> through the second air suction channel <NUM>, and the processes of air suction, air compression and gas exhausting are completed in the second working cavity, and the gas is exhausted through the second exhaust channel <NUM>, and the exhausting process is completed twice per revolution of the crankshaft <NUM>.

The embodiments of the second aspect of the present invention provides refrigeration device, which comprises a compressor in any of the above embodiments, so the refrigeration device provided by the present invention has all the benefits of the compressor provided in any of the above embodiments.

As shown in <FIG>, in a specific embodiment, the refrigeration device further comprises a first condenser <NUM>, a first throttling part <NUM>, a first evaporator <NUM>, a first reservoir <NUM>, a second condenser <NUM>, a second throttling part <NUM>, a second evaporator <NUM> and a second reservoir <NUM>.

The first condenser <NUM> is communicated with the first air outlet port <NUM> of the compressor, the first throttling part <NUM> is communicated with the first condenser <NUM>, the first evaporator <NUM> is communicated with the first throttling part <NUM>, and the first reservoir <NUM> is communicated with the first evaporator <NUM> and the first air suction channel <NUM> of the compressor.

The second condenser <NUM> is communicated with the second air outlet port <NUM> of the compressor, the second throttling part <NUM> is communicated with the second condenser <NUM>, the second evaporator <NUM> is communicated with the second throttling part <NUM>, and the second reservoir <NUM> is communicated with the second evaporator <NUM> and the second air suction channel <NUM> of the compressor.

The compressor, the first condenser <NUM>, the first throttling part <NUM>, the first evaporator <NUM> and the first reservoir <NUM> form a first set of refrigeration system, while the compressor, the second condenser <NUM>, the second throttling part <NUM>, the second evaporator <NUM> and the second reservoir <NUM> form a second set of refrigeration system. The two independent refrigeration systems, i.e., the refrigeration device realizes multi-exhaust functions realized by multiple compressors in related arts through one compressor, which reduces the processing cost of the refrigeration device and also reduces the occupied space of refrigeration device, and improves the convenience of installing internal components of refrigeration device. Due to the different exhaust pressures of the first cylinder <NUM> and the second cylinder <NUM>, the exhaust pressures reaching the first condenser <NUM> and the second condenser <NUM> are different, which can make the refrigeration device have double condensation temperatures and double evaporation temperatures. It is beneficial to realizing cascade utilization of energy and improving the energy efficiency of refrigeration device. Especially, under the condition that the displacements of the first cylinder <NUM> and the second cylinder <NUM> are different, the amounts of a refrigerant condensed by the first condenser <NUM> and the second condenser <NUM> are different, and the energy efficiency of refrigeration device is further improved.

The flow process of the refrigerant is as follows:.

The first air outlet port <NUM> of the compressor is connected with the first condenser <NUM> through pipes and other components, and the refrigerant flows into the first evaporator <NUM> through the first expansion valve, from which it flows into the first air suction channel <NUM> of the first cylinder <NUM> through the air suction channel of the first reservoir <NUM>. The first air outlet port <NUM> is connected with the second condenser <NUM> through a pipe assembly, and the refrigerant flows into the second evaporator <NUM> through the second expansion valve, and then flows from the second evaporator <NUM> to the second air suction channel <NUM> of the second cylinder <NUM> through the air suction channel of the second reservoir <NUM>.

As shown in <FIG>, in another specific embodiment, the refrigeration device further comprises a third condenser <NUM>, a third throttling part, a third evaporator <NUM>, a third reservoir <NUM>, a fourth condenser <NUM>, a fourth throttling part and a fourth evaporator <NUM>.

The third condenser <NUM> is communicated with the first air outlet port <NUM> of the compressor, the third throttling part is communicated with the third condenser <NUM>, the third evaporator <NUM> is communicated with the third throttling part, and the third reservoir <NUM> is communicated with the third evaporator <NUM> and the first air suction channel <NUM> and the second air suction channel <NUM> of the compressor.

The fourth condenser <NUM> is communicated with the second air outlet port <NUM> of the compressor, the fourth throttling part is communicated with the fourth condenser <NUM>, the fourth evaporator <NUM> is communicated with the fourth throttling part, and the third reservoir <NUM> also is communicated with the fourth evaporator <NUM> and the first air suction channel <NUM> and the second air suction channel <NUM> of the compressor.

The compressor, the third condenser <NUM>, the third throttling part, the third evaporator <NUM> and the third reservoir <NUM> form a third set of refrigeration system, while the compressor, the fourth condenser <NUM>, the fourth throttling part, the fourth evaporator <NUM> and the third reservoir <NUM> form a fourth set of refrigeration system. The two independent refrigeration systems, i.e., the refrigeration device realizes the multi-exhaust function realized by multiple compressors in related arts through one compressor, which reduces the processing cost of the refrigeration device and also reduces the occupied space of refrigeration device, and improves the convenience of installing internal components of refrigeration device. The first air suction channel <NUM> and the second air suction channel <NUM> communicate with the third reservoir <NUM>, so that arrangement of one reservoir can meet the suction functions of the first cylinder <NUM> and the second cylinder <NUM>, the number of components in the refrigeration device is reduced, the processing cost of the refrigeration device is further reduced, the volume of the refrigeration device is effectively reduced, and the convenience in the installation of the refrigeration device is increased. Furthermore, due to the different exhaust pressures of the first cylinder <NUM> and the second cylinder <NUM>, the exhaust pressures reaching the third condenser <NUM> and the fourth condenser <NUM> are different, which can make the refrigeration device have double condensation temperatures and double evaporation temperatures, which is beneficial to realizing the cascade utilization of energy and improving the energy efficiency of the refrigeration device. Especially, under the condition that the displacements of the first cylinder <NUM> and the second cylinder <NUM> are different, the amounts of refrigerant condensed by the third condenser <NUM> and the fourth condenser <NUM> are different, and the energy efficiency of the refrigeration device is further improved.

The above two specific embodiments realize the function of double exhaust parameters of a single compressor, and effectively save energy consumption by using double exhausting of heat at high and low temperatures. Meanwhile, the range of a parameter ratio of two cylinders is reasonably specified, which can give full play to advantages of double-exhaust circulation and improve energy efficiency.

In the present invention, the term "a plurality of" means two or more, unless otherwise specifically regulated. Terms such as "installation", "connected", "connecting", "fixation" and the like shall be understood in broad sense, and for example, "connecting" may refer to fixed connection or detachable connection or integral connection, and "connected" may refer to direct connection or indirect connection through an intermediate medium. For those ordinary skilled in the art, the specific meanings of the above terms in the present invention may be understood according to concrete conditions.

In the illustration of this description, the illustration of terms of "one embodiment", "some embodiments", "specific embodiments", etc. means that specific features, structures, materials or characteristics illustrated in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this description, exemplary statements for the above terms shall not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined appropriately in any one or more embodiments or examples. The above only describes preferred embodiments of the present invention and is not intended to limit the present invention. Moreover, the described specific features, structures, materials or characteristics can be combined appropriately in any one or more embodiments or examples.

Claim 1:
A compressor, comprising:
a housing (<NUM>), wherein a first air outlet port (<NUM>) and a second air outlet port (<NUM>) which do not communicate with each other are disposed on the housing (<NUM>);
a first cylinder (<NUM>) and a first piston (<NUM>), wherein the first cylinder (<NUM>) is provided with a first accommodating cavity, the first piston (<NUM>) is eccentrically disposed in the first accommodating cavity, and the first cylinder (<NUM>) exhausts gas through the first air outlet port (<NUM>); and
a second cylinder (<NUM>) and a second piston (<NUM>), wherein the second cylinder (<NUM>) is provided with a second accommodating cavity, the second piston (<NUM>) is eccentrically disposed in the second accommodating cavity, and the second cylinder (<NUM>) exhausts gas through the second air outlet port (<NUM>);
characterised in that
an inner diameter of the first cylinder (<NUM>) is D1, an eccentric distance of the first piston (<NUM>) relative to the first accommodating cavity is e1, the height of the first cylinder (<NUM>) is H1, and an exhaust pressure of the first cylinder (<NUM>) is P1;
an inner diameter of the second cylinder (<NUM>) is D2, an eccentric distance of the second piston (<NUM>) relative to the second accommodation cavity is e2, the height of the second cylinder (<NUM>) is H2, and an exhaust pressure of the second cylinder (<NUM>) is P2; <MAT> and
D1 is different to D2.