CN111141045A - Refrigeration system - Google Patents
Refrigeration system Download PDFInfo
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- CN111141045A CN111141045A CN201811314886.1A CN201811314886A CN111141045A CN 111141045 A CN111141045 A CN 111141045A CN 201811314886 A CN201811314886 A CN 201811314886A CN 111141045 A CN111141045 A CN 111141045A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/06—Compression machines, plants or systems with non-reversible cycle with compressor of jet type, e.g. using liquid under pressure
- F25B1/08—Compression machines, plants or systems with non-reversible cycle with compressor of jet type, e.g. using liquid under pressure using vapour under pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
Abstract
The invention discloses a refrigeration system, which comprises: the compressor comprises a first cylinder, a second cylinder and an injection channel, the first cylinder is provided with a first air return port and a first exhaust port which are respectively communicated with a cylinder cavity of the first cylinder, and the second cylinder is provided with a second air return port and a second exhaust port which are respectively communicated with a cylinder cavity of the second cylinder; the air injection port is communicated with the cylinder cavity of the first cylinder through the injection channel; a first throttling device is arranged between the evaporator and the condenser; the first four-way reversing valve comprises a first port, a second port, a third port and a fourth port; the second four-way selector valve includes fifth through eighth ports. By arranging the injection channel, the low-temperature heating capacity of the refrigeration system can be improved, the energy efficiency of the refrigeration system can be improved, and therefore the working efficiency of the refrigeration system can be improved.
Description
Technical Field
The invention relates to the field of refrigeration and heating, in particular to a refrigeration system.
Background
In addition, under the low-temperature condition, along with the increase of a compression ratio, the heating cycle efficiency is reduced, the loss of a refrigerating system is increased, and therefore the energy efficiency of the air conditioning system is reduced particularly obviously.
In the related art, a conventional jet engine type can improve low-temperature heating capacity to a certain extent, but the basic displacement of a compressor cannot be changed, and the capacity improvement is limited by circulation.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a refrigerating system which can improve the low-temperature heating capacity and improve the energy efficiency of the refrigerating system.
According to the refrigeration system of the present invention, the refrigeration system comprises: compressor, evaporimeter, condenser, first four-way reversing valve, second four-way reversing valve and intercooler, be equipped with gas vent and jet on the compressor, the compressor includes: the air compressor comprises a first air cylinder, a second air cylinder and an injection channel, wherein the first air cylinder is provided with a first air return port and a first exhaust port which are respectively communicated with an air cylinder cavity of the first air cylinder, and the first exhaust port is communicated with an exhaust port of the compressor; the second cylinder is provided with a second return air port and a second exhaust port which are respectively communicated with a cylinder cavity of the second cylinder, and the second exhaust port is communicated with an exhaust port of the compressor; the gas injection port is communicated with a cylinder cavity of the first cylinder through the injection channel, and the injection channel and the second return air port are configured to selectively exchange the source of the entering refrigerant; a first throttling device is arranged between the evaporator and the condenser; the first four-way reversing valve comprises a first valve port, a second valve port, a third valve port and a fourth valve port, wherein the first valve port is connected with the exhaust port, the second valve port is connected with the evaporator, and the third valve port is connected with the condenser; the second four-way reversing valve comprises fifth to eighth valve ports, the fourth valve port is connected with the first return air port and the fifth valve port, the sixth valve port is connected with the second return air port, and the seventh valve port is connected with the air injection port; the intercooler is arranged between the evaporator and the condenser to separate gas and liquid of the refrigerant flowing through the intercooler, and a refrigerant gas outlet of the intercooler is connected with the eighth valve port.
According to the refrigeration system, the injection channel is arranged, so that the low-temperature heating capacity of the refrigeration system can be improved, the energy efficiency of the refrigeration system can be improved, and the working efficiency of the refrigeration system can be improved.
In some examples of the invention, the intercooler comprises: the flash evaporator comprises a first flash evaporation opening, a second flash evaporation opening and a flash evaporation gas outlet, the first flash evaporation opening and the second flash evaporation opening are respectively connected with the evaporator and the condenser, and the flash evaporation gas outlet is connected with the eighth valve port.
In some examples of the invention, the first throttling device is arranged between the first flash opening and the evaporator, and the second flash opening and the condenser are connected through a second throttling device.
In some examples of the invention, the intercooler comprises: and a first refrigerant flow channel and a second refrigerant flow channel are defined in the economizer, two ends of the first refrigerant flow channel are respectively connected with the evaporator and the eighth valve port, and two ends of the second refrigerant flow channel are respectively connected with the condenser and the evaporator.
In some examples of the disclosure, two ends of the first refrigerant flow channel are respectively a first economizer opening and a second economizer opening, two ends of the second refrigerant flow channel are respectively a third economizer opening and a fourth economizer opening, the first economizer opening is connected to the evaporator through the first throttling device, the second economizer opening is connected to the eighth valve port, the third economizer opening is connected to the evaporator, and the fourth economizer opening is connected to the condenser through the second throttling device.
In some examples of the present invention, the refrigeration system further includes a gas-liquid separation device, the gas-liquid separation device is provided with an inlet, a first outlet, and a second outlet, the inlet is connected to the fourth valve port, the first outlet is connected to the first return port, and the second outlet is connected to the fifth valve port.
In some examples of the present invention, a first check valve is provided in the injection passage, and the first check valve is configured to be closed by the gas injection port in a direction away from the first cylinder chamber.
In some examples of the present invention, the refrigeration system further includes a second check valve disposed between the gas injection port of the compressor and the seventh valve port and configured to be closed by the gas injection port in a direction toward the seventh valve port.
In some examples of the invention, the following relationship is satisfied between the swept volume V1 of the first cylinder chamber and the swept volume V2 of the second cylinder chamber: V2/V1 is more than or equal to 0.03 and less than or equal to 0.25.
In some examples of the invention, the compressor further comprises: the device comprises a partition plate, a first bearing, a second bearing and an injection channel, wherein the partition plate is arranged between a first cylinder and a second cylinder; the first bearing is arranged at one end of the first cylinder, which is far away from the partition plate; the second bearing is arranged at one end of the second cylinder, which is far away from the partition plate; the injection passage is formed on the partition plate or the first bearing.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a sectional view of a compressor according to an embodiment of the present invention;
fig. 2 is a sectional view of a partial structure of a compressor according to an embodiment of the present invention;
FIG. 3 is a schematic view of a second check valve disposed between a gas port and a seventh valve port of a compressor of a refrigeration system according to an embodiment of the present invention;
FIG. 4 is a system cycle diagram of a refrigeration system in which the intercooler is a flash evaporator according to an embodiment of the present invention;
fig. 5 is a system cycle diagram of an intercooler-economizer refrigeration system according to an embodiment of the present invention.
Reference numerals:
a compressor 10;
an exhaust port 1; an air ejection port 11;
a first cylinder 2; a first return air port 21;
a second cylinder 3; a second return air port 31;
a partition plate 4; a first bearing 5; a second bearing 6;
an injection channel 7; a first check valve 71;
a refrigeration system 20;
an evaporator 201; a condenser 202; a first throttling means 203; a second throttling device 204;
a first four-way reversing valve 204; the first valve port 2041; a second valve port 2042; a third valve port 2043; the fourth valve port 2044;
a second four-way reversing valve 205; the fifth port 2051; the sixth port 2052; the seventh port 2053; the eighth valve port 2054;
an intercooler 206; a refrigerant gas outlet 2061; a flash evaporator 2062; a first flash opening 2063; a second flash opening 2064; an economizer 2065; a first refrigerant flow channel 2066; a second refrigerant flow channel 2067; a first economizer opening 2068; a second economizer opening 2069; a third economizer opening 2070; a fourth economizer opening 2071;
a gas-liquid separation device 207; an inlet 2072; a first outlet 2073; a second outlet 2074;
a second one-way valve 208.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A refrigeration system 20 according to an embodiment of the present invention is described below with reference to fig. 1-5. As shown in fig. 1 to 5, a refrigeration system 20 according to an embodiment of the present invention includes: compressor 10, evaporator 201, condenser 202, first four-way reversing valve 204, second four-way reversing valve 205, and intercooler 206.
The compressor 10 includes a housing provided with an exhaust port 1 and an air injection port 11. The compressor 10 may include: a first cylinder 2, a second cylinder 3 and an injection channel 7, the first cylinder 2 and the second cylinder 3 all being arranged in the housing. The exhaust port 1 and the air ejection port 11 are provided on the housing.
The first cylinder 2 may be provided with a first return air port 21 and a first exhaust port respectively communicated with a cylinder cavity of the first cylinder 2, the air jet 11 is communicated with the cylinder cavity of the first cylinder 2, and the first exhaust port is communicated with the exhaust port 1 of the compressor 10, that is, after the refrigerant gas is compressed in the first cylinder 2, the refrigerant gas is discharged into the casing through the first exhaust port and is discharged to the outside of the compressor 10 through the exhaust port 1 of the compressor 10. The second cylinder 3 may be provided with a second return air port 31 and a second exhaust port, which are respectively communicated with the cylinder cavity of the second cylinder 3, and the second exhaust port is communicated with the exhaust port 1 of the compressor 10, that is, after the refrigerant gas is compressed in the second cylinder 3, the refrigerant gas is exhausted into the casing through the second exhaust port and is exhausted to the outside of the compressor 10 through the exhaust port 1 of the compressor 10.
A first throttle device 203 may be provided between the evaporator 201 and the condenser 202. In some embodiments of the present invention, the gas injection port 11 may communicate with the cylinder cavity of the first cylinder 2 through the injection channel 7, that is, both ends of the injection channel 7 communicate with the gas injection port 11 of the compressor 10 and the cylinder cavity of the first cylinder 2, respectively, that is, one end of the injection channel 7 communicates with the gas injection port 11 of the compressor 10, and the other end of the injection channel 7 communicates with the cylinder cavity of the first cylinder 2.
The injection channel 7 and the second return air port 31 are configured to selectively exchange the sources of the entering refrigerant, that is, the entering refrigerant in the injection channel 7 and the entering refrigerant in the second return air port 31 can exchange with each other under certain conditions.
Further, as shown in fig. 3-5, the first four-way reversing valve 204 may include: a first valve port 2041, a second valve port 2042, a third valve port 2043 and a fourth valve port 2044, wherein the first valve port 2041 is connected with the exhaust port 1 of the compressor 10, the second valve port 2042 is connected with the evaporator 201, and the third valve port 2043 is connected with the condenser 202. The first four-way selector valve 204 is used to switch the refrigerant flow path when the refrigeration system 20 switches between the cooling mode and the heating mode. Specifically, in the cooling mode, the first valve port 2041 is communicated with the third valve port 2043, and the second valve port 2042 is communicated with the fourth valve port 2044; in the heating mode, the first valve port 2041 is in communication with the second valve port 2042, and the third valve port 2043 is in communication with the fourth valve port 2044.
The second four-way reversing valve 205 may include: a fifth valve port 2051, a sixth valve port 2052, a seventh valve port 2053, and an eighth valve port 2054, the fourth valve port 2044 may be connected to both the first return port 21 and the fifth valve port 2051, the sixth valve port 2052 may be connected to the second return port 31, and the seventh valve port 2053 may be connected to the gas injection port 11.
The intercooler 206 may be disposed between the evaporator 201 and the condenser 202, the intercooler 206 may perform gas-liquid separation of the refrigerant flowing therethrough, and the refrigerant gas outlet 2061 of the intercooler 206 is connected to the eighth valve port 2054.
The second four-way selector valve 205 is configured to switch the refrigerant gas discharged from the refrigerant gas outlet 2061 of the intercooler 206 and the refrigerant gas flowing out of the fourth valve port 2044 between flowing directions.
That is, when the fifth valve port 2051 is communicated with the sixth valve port 2052, and the seventh valve port 2053 is communicated with the eighth valve port 2054, the refrigerant gas (system return air) flowing out of the fourth valve port 2044 enters the second cylinder 3, and the refrigerant gas discharged from the refrigerant gas outlet 2061 enters the blow-off passage 7 and further flows into the first cylinder 2; when the fifth port 2051 is communicated with the seventh port 2053 and the sixth port 2052 is communicated with the eighth port 2054, the refrigerant gas (system return air) flowing out of the fourth port 2044 enters the injector passage 7, and further flows into the first cylinder 2, and the refrigerant gas discharged from the refrigerant gas outlet 2061 enters the second cylinder 3.
It can be known that the refrigerant gas flowing out of the fourth valve port 2044 is system return air of the refrigeration system 20, the system return air pressure is low pressure, the pressure of the refrigerant gas flowing out of the refrigerant gas outlet 2061 of the intercooler 206 is medium pressure, and the pressure of the part of the refrigerant gas is greater than the system return air pressure.
In summary, by providing the second four-way selector valve 205, the refrigerant entering the injection passage 7 and the refrigerant entering the second return air port 31 can be exchanged with each other under certain conditions. That is, the refrigerant introduced into the first cylinder 2 through the injection passage 7 and the refrigerant introduced into the second cylinder 3 through the second return port 31 can be switched between the medium pressure mode and the low pressure mode. That is, when the air injection in the injection passage 7 is the medium pressure, the return air of the second cylinder 3 is the low pressure; when the air injection in the injection passage 7 is low pressure, the return air of the second cylinder 3 is medium pressure.
In an embodiment of the invention, the first return port 21 of the first cylinder 2 is always in communication with the low pressure return air of the compressor 10. The first cylinder 2 is further communicated with an injection channel 7, the injection channel 7 can be selectively communicated with medium-pressure or low-pressure return air of the refrigeration system 20, and medium-pressure or low-pressure refrigerant gas of the refrigeration system 20 can be conveyed into the first cylinder 2 through the injection channel 7.
Specifically, the gas injection port 11 of the first cylinder 2 is located downstream of the return port of the first cylinder 2, i.e., the intake stroke of the first cylinder 2, first takes in gas from the return port, and then takes in gas from the gas injection port 11. When the refrigerant gas flowing into the injection channel 7 is at a low pressure (i.e., lower than or equal to the return pressure of the first cylinder 2), the injection channel 7 cannot inject gas into the first cylinder 2, so that the refrigerant in the injection channel 7 cannot enter the first cylinder 2 at this time because the return pressure of the first cylinder 2 is at a low pressure and the pressure of the compressed refrigerant therein is greater than the pressure of the refrigerant in the injection channel 7. At this time, the refrigerant introduced into the second cylinder 3 is the medium-pressure refrigerant gas from the intercooler 206.
When the gas in the injection passage 7 is at an intermediate pressure (i.e., higher than the return pressure of the first cylinder 2), the injection passage 7 can inject gas into the first cylinder 2. At this time, the refrigerant introduced into the second cylinder 3 is returned from the system.
In some embodiments of the present invention, the compressor 10 operates under light operating conditions, and by communicating the fifth valve port 2051 with the seventh valve port 2053 and communicating the sixth valve port 2052 with the eighth valve port 2054, at this time, the gas injection in the injection channel 7 is at a low pressure, that is, the injection channel 7 does not inject gas toward the first cylinder 2 (the gas pressure in the injection channel 7 is less than the gas pressure in the first cylinder 2, and the gas cannot be injected), and the second cylinder 3 directly compresses the medium-pressure refrigerant gas from the intercooler 206, so that the cycle efficiency can be optimized, the heat exchange efficiency of the evaporator 201 can be improved, and no medium-pressure refrigerant gas and low-pressure refrigerant gas are mixed in the compressor 10, and no mixing loss is generated, thereby improving the energy efficiency of the entire refrigeration system 20.
In other embodiments of the present invention, the compressor 10 operates under low temperature conditions (heavy load condition), by making the fifth valve port 2051 communicate with the sixth valve port 2052, and the seventh valve port 2053 communicate with the eighth valve port 2054, thereby the jet of the injection channel 7 is medium pressure, the return air of the second cylinder 3 is low pressure, the injection channel 7 jets air into the first cylinder 2 (the jet pressure is medium pressure, medium pressure refrigerant gas is jetted into the first cylinder 2, and the medium pressure refrigerant gas is mixed with the air entering from the first return air port of the first cylinder 2), the second cylinder 3 directly compresses the low pressure refrigerant gas coming from the return air of the system, such an arrangement can be that the working volume of the compressor 10 is increased, that is, the working volume of the first cylinder 2 is increased, thereby the basic displacement (volume) of the compressor 10 is increased, the refrigerant circulation flow in the compressor 10 can be increased, and the injection channel 7 jets air into the first cylinder 2, the refrigerant circulation flow rate of the heating end (evaporator) can be further increased, and the heating capacity of the whole refrigeration system 20 can be further improved.
Therefore, according to the refrigeration system 20 of the embodiment of the present invention, by providing the injection passage 7, the low-temperature heating capacity of the refrigeration system 20 can be improved, the energy efficiency of the refrigeration system 20 can be improved, and thus the working efficiency of the refrigeration system 20 can be improved.
In some embodiments of the present invention, as shown in FIG. 4, intercooler 206 may comprise: flash vessels 2062, 2062 may include a first flash opening 2063, a second flash opening 2064, and a flash gas outlet, which is referred to above as the refrigerant gas outlet 2061 of intercooler 206. The first flash evaporation opening 2063 and the second flash evaporation opening 2064 are respectively connected with the evaporator 201 and the condenser 202, and the flash evaporation gas outlet is connected with the eighth valve port 2054, it should be explained that the first flash evaporation opening 2063 is connected with the evaporator 201, and the second flash evaporation opening 2064 is connected with the condenser 202, so that the refrigerant in the evaporator 201 can flow into the flash evaporator 2062, the refrigerant in the flash evaporator 2062 can flow into the condenser 202, and the refrigerant in the flash evaporator 2062 can flow into the second return air port 31 or the injection channel 7.
When the suction pressure of the second return air port 31 is low, the fifth port 2051 is communicated with the sixth port 2052, the seventh port 2053 is communicated with the eighth port 2054, and the second cylinder 3 compresses the low-pressure refrigerant gas from the condenser 202, so that the basic displacement of the compressor 10 can be increased. When the suction pressure of the second return air port 31 is a medium pressure, the fifth valve port 2051 is communicated with the seventh valve port 2053, the sixth valve port 2052 is communicated with the eighth valve port 2054, and the second cylinder 3 compresses the saturated medium-pressure refrigerant gas from the flash evaporator 2062, so that the cycle efficiency can be optimized, the heat exchange efficiency of the evaporator 201 can be improved, and no medium-pressure refrigerant gas and low-pressure refrigerant gas are mixed in the compressor 10, and no mixing loss is generated, thereby improving the energy efficiency of the whole refrigeration system 20.
Further, as shown in fig. 4, a first throttling device 203 may be disposed between the first flash evaporation opening 2063 and the condenser 202, and the second flash evaporation opening 2064 and the evaporator 201 may be connected by a second throttling device 204, wherein both the first throttling device 203 and the second throttling device 204 have the functions of throttling and reducing pressure, and in the heating mode, the first throttling device 203 may reduce the pressure of the high-pressure refrigerant flowing out of the evaporator 201, and the second throttling device 204 may reduce the pressure of the refrigerant flowing out of the flash evaporator 2062, so that the pressure of the refrigerant in the refrigeration system 20 may meet the working requirement, and the normal pressure reduction of the refrigerant in the flow path in the refrigeration system 20 may be ensured. Of course, in the cooling mode, the throttling and depressurizing actions of the first throttling device 203 and the second throttling device 204 can also ensure the normal refrigerant pressure drop of the flow path in the cooling system 20.
In other embodiments of the present invention, as shown in FIG. 5, intercooler 206 may comprise: in the economizer 2065, a first refrigerant flow channel 2066 and a second refrigerant flow channel 2067 may be defined in the economizer 2065, two ends of the first refrigerant flow channel 2066 may be connected to the evaporator 201 and the eighth valve port 2054, two ends of the second refrigerant flow channel 2067 may be connected to the condenser 202 and the evaporator 201, respectively, that is, one end of the first refrigerant flow channel 2066 is connected to one end of the evaporator 201, the other end of the first refrigerant flow channel 2066 is connected to the eighth valve port 2054, one end of the evaporator 201 is connected to one end of the second refrigerant flow channel 2067, and the other end of the second refrigerant flow channel 2067 is connected to the condenser 202. After the refrigerant in the evaporator 201 flows out of the evaporator 201, the refrigerant can simultaneously enter the first refrigerant flow passage 2066 and the second refrigerant flow passage 2067.
Further, as shown in fig. 5, two ends of the first refrigerant flow channel 2066 may be a first economizer opening 2068 and a second economizer opening 2069, two ends of the second refrigerant flow channel 2067 may be a third economizer opening 2070 and a fourth economizer opening 2071, respectively, the first economizer opening 2068 is connected to the evaporator 201 through the first throttling device 203, the second economizer opening 2069 is connected to the eighth valve port 2054, the third economizer opening 2070 is connected to the evaporator 201, and the fourth economizer opening 2071 is connected to the condenser 202 through the second throttling device 204. The first throttling device 203 and the second throttling device 204 both have the functions of throttling and reducing pressure, the first throttling device 203 reduces the pressure of the high-pressure refrigerant flowing out of the evaporator 201, the temperature is reduced, so that the temperature of the refrigerant entering the first refrigerant flow channel 2066 is lower than the temperature of the refrigerant entering the second refrigerant flow channel 2067, the refrigerants in the two refrigerant channels can exchange heat, namely after the refrigerant in the first refrigerant flow channel 2066 absorbs the higher temperature in the second refrigerant flow channel 2067, the refrigerant gas-liquid is evaporated to form a gaseous state, the refrigerant gas is discharged from the second economizer opening 2069 and then is connected through the eighth valve port 2054, and the gaseous refrigerant can be selectively input into the first cylinder 2 or the second cylinder 3.
In some embodiments of the present invention, the compressor 10 may further include: a partition 4, a first bearing 5, a second bearing 6 and an injection channel 7. The partition plate 4 may be disposed between the first cylinder 2 and the second cylinder 3. The first bearing 5 may be disposed at an end of the first cylinder 2 far from the partition plate 4, and the second bearing 6 may be disposed at an end of the second cylinder 3 far from the partition plate 4, and it should be noted that the first bearing 5 may be disposed at an upper end of the first cylinder 2, and the second bearing 6 may be disposed at a lower end of the second cylinder 3. The injection passage 7 may be formed on the partition plate 4 or the first bearing 5, whereby the injection passage 7 may be formed in a simpler manner.
The compressor 10 may be provided with two cylinders or more than two cylinders, and the present application will be described by taking the provision of two cylinders (i.e., the first cylinder 2 and the second cylinder 3) as an example. Of course, the compressor 10 may have more cylinders, and the description thereof is omitted.
In some embodiments of the present invention, as shown in fig. 2, a first check valve 71 may be disposed in the injection channel 7, and the first check valve 71 is configured to be closed by the gas nozzle 11 in a direction away from the cylinder cavity of the first cylinder 2, so that the arrangement can prevent the refrigerant in the first cylinder 2 from flowing back to the injection channel 7, and can ensure the amount of gas in the first cylinder 2, thereby ensuring the compression amount of the compressor 10, and further ensuring the operational reliability of the compressor 10.
In some embodiments of the present invention, as shown in fig. 3, the refrigeration system 20 may further include: a second check valve 208, the second check valve 208 may be disposed between the gas nozzle 11 of the compressor 10 and the seventh port 2053, and the second check valve 208 is configured to be closed from the gas nozzle 11 toward the seventh port 2053. Because the gas pressure of the gas injection flow path can be switched, when the gas pressure of the gas injection flow path is low, the gas in the compression cavity of the first cylinder 2 is compressed, and the pressure of the gas is higher than the gas pressure of the gas injection flow path, so that the second check valve 208 can prevent the refrigerant from flowing back into the gas injection flow path from the compression cavity of the first cylinder 2, thereby reducing the energy efficiency of the system, therefore, by arranging the second check valve 208, the gas in the first cylinder 2 can be further prevented from flowing back into the gas injection flow path, the energy efficiency of the compressor 10 can be further ensured, and the working reliability of the compressor 10 can be further ensured.
In some embodiments of the present invention, the following relations are satisfied between the swept volume V1 of the cylinder chamber of the first cylinder 2, the swept volume V2 of the cylinder chamber of the first cylinder 2, and the swept volume V2 of the cylinder chamber of the second cylinder 3: V2/V1 is not less than 0.03 and not more than 0.25, so that the ratio of the working volume ratio of the first cylinder 2 to the second cylinder 3 is more reasonable, the compressor 10 can effectively compress gas, the energy efficiency of the compressor 10 can be further ensured, and the working performance of the compressor 10 can be further improved.
In some embodiments of the present invention, as shown in fig. 3-5, the refrigeration system 20 may further include: the gas-liquid separator 207 may be provided with an inlet 2072, a first outlet 2073 and a second outlet 2074, the inlet 2072 is connected to the fourth valve port 2044, the first outlet 2073 is connected to the first return port 21, and the second outlet 2074 is connected to the fifth valve port 2051, wherein the gas-liquid separator 207 may separate a mixture of gas and liquid flowing in from the inlet 2072, may store the liquid in the gas-liquid separator 207, and may allow the gas to flow out of the gas-liquid separator 207 from the first outlet 2073 and the second outlet 2074, thereby preventing the liquid from flowing into the compressor 10 and ensuring the working life of the compressor 10.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A refrigeration system, comprising:
the compressor, be equipped with gas vent and jet on the compressor, the compressor includes:
the first cylinder is provided with a first return air port and a first exhaust port which are respectively communicated with a cylinder cavity of the first cylinder, and the first exhaust port is communicated with an exhaust port of the compressor;
the second air cylinder is provided with a second return air port and a second exhaust port which are respectively communicated with an air cylinder cavity of the second air cylinder, and the second exhaust port is communicated with an exhaust port of the compressor;
the injection channel is communicated with a cylinder cavity of the first cylinder through the injection port, and the injection channel and the second return port are configured to selectively exchange the source of the entering refrigerant;
the condenser is arranged between the evaporator and the condenser, and a first throttling device is arranged between the evaporator and the condenser;
a first four-way selector valve including first to fourth ports, the first port being connected to the exhaust port, the second port being connected to the evaporator, and the third port being connected to the condenser;
the second four-way reversing valve comprises fifth to eighth valve ports, the fourth valve port is connected with the first return port and the fifth valve port, the sixth valve port is connected with the second return port, and the seventh valve port is connected with the gas injection port;
the intercooler is arranged between the evaporator and the condenser, and a refrigerant gas outlet of the intercooler is connected with the eighth valve port.
2. The refrigerant system as set forth in claim 1, wherein said intercooler includes:
the flash evaporator comprises a first flash evaporation opening, a second flash evaporation opening and a flash evaporation gas outlet, the first flash evaporation opening and the second flash evaporation opening are respectively connected with the evaporator and the condenser, and the flash evaporation gas outlet is connected with the eighth valve port.
3. A refrigeration system as set forth in claim 2 wherein said first throttling means is disposed between said first flash opening and said evaporator and said second flash opening is connected to said condenser by a second throttling means.
4. The refrigerant system as set forth in claim 1, wherein said intercooler includes:
and a first refrigerant flow channel and a second refrigerant flow channel are defined in the economizer, two ends of the first refrigerant flow channel are respectively connected with the evaporator and the eighth valve port, and two ends of the second refrigerant flow channel are respectively connected with the condenser and the evaporator.
5. The refrigeration system of claim 4, wherein two ends of the first refrigerant channel are respectively a first economizer opening and a second economizer opening, two ends of the second refrigerant channel are respectively a third economizer opening and a fourth economizer opening, the first economizer opening is connected with the evaporator through the first throttling device, the second economizer opening is connected with the eighth valve port, the third economizer opening is connected with the evaporator, and the fourth economizer opening is connected with the condenser through a second throttling device.
6. The refrigeration system of claim 1, further comprising a gas-liquid separation device, wherein the gas-liquid separation device is provided with an inlet, a first outlet and a second outlet, the inlet is connected to the fourth valve port, the first outlet is connected to the first return port, and the second outlet is connected to the fifth valve port.
7. The refrigerant system as set forth in claim 1, wherein a first check valve is provided in said injection passage, said first check valve being configured to be closed by said gas ejection port in a direction away from said first cylinder chamber.
8. The refrigerant system as set forth in claim 1, further including a second check valve disposed between said air port of said compressor and said seventh port and configured to be closed by said air port in a direction toward said seventh port.
9. The refrigerant system as set forth in claim 1, wherein the following relationship is satisfied between the working volume V1 of said first cylinder chamber and the working volume V2 of said second cylinder chamber: V2/V1 is more than or equal to 0.03 and less than or equal to 0.25.
10. The refrigerant system as set forth in claim 1, wherein said compressor further includes:
a partition plate disposed between the first cylinder and the second cylinder;
the first bearing is arranged at one end, far away from the partition plate, of the first cylinder;
the second bearing is arranged at one end, far away from the partition plate, of the second cylinder;
an injection passage formed on the diaphragm or the first bearing.
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| CN201811314886.1A CN111141045B (en) | 2018-11-06 | 2018-11-06 | Refrigeration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811314886.1A CN111141045B (en) | 2018-11-06 | 2018-11-06 | Refrigeration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821716A (en) * | 2014-03-03 | 2014-05-28 | 广东美芝制冷设备有限公司 | Two-stage rotary compressor and refrigeration circulating device with same |
| CN204630142U (en) * | 2015-05-13 | 2015-09-09 | 广东美芝制冷设备有限公司 | The cooling and warming circulatory system |
| CN106546030A (en) * | 2016-11-30 | 2017-03-29 | 广东美芝制冷设备有限公司 | Refrigeration system |
| CN106568225A (en) * | 2016-10-26 | 2017-04-19 | 广东美芝制冷设备有限公司 | Compressor and refrigeration device with same |
| CN207004813U (en) * | 2017-02-06 | 2018-02-13 | 广东美芝制冷设备有限公司 | Rotary compressor and there is its refrigeration system |
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2018
- 2018-11-06 CN CN201811314886.1A patent/CN111141045B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821716A (en) * | 2014-03-03 | 2014-05-28 | 广东美芝制冷设备有限公司 | Two-stage rotary compressor and refrigeration circulating device with same |
| CN204630142U (en) * | 2015-05-13 | 2015-09-09 | 广东美芝制冷设备有限公司 | The cooling and warming circulatory system |
| CN106568225A (en) * | 2016-10-26 | 2017-04-19 | 广东美芝制冷设备有限公司 | Compressor and refrigeration device with same |
| CN106546030A (en) * | 2016-11-30 | 2017-03-29 | 广东美芝制冷设备有限公司 | Refrigeration system |
| CN207004813U (en) * | 2017-02-06 | 2018-02-13 | 广东美芝制冷设备有限公司 | Rotary compressor and there is its refrigeration system |
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| CN111141045B (en) | 2021-11-02 |
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