CN108716793B - Oil content device and heat pump system thereof - Google Patents
Oil content device and heat pump system thereof Download PDFInfo
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- CN108716793B CN108716793B CN201810682858.9A CN201810682858A CN108716793B CN 108716793 B CN108716793 B CN 108716793B CN 201810682858 A CN201810682858 A CN 201810682858A CN 108716793 B CN108716793 B CN 108716793B
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses an oil device which is at least provided with three interfaces, wherein the oil device comprises a first oil separator, an oil filter screen, a first heat exchanger and a first restrictor, the first heat exchanger and the oil filter screen are respectively arranged in a first heat exchange cavity of the first oil separator from top to bottom, one end of the first heat exchange cavity is communicated with the first interface, the lower part of the oil filter screen is communicated with the second interface, an oil return pipe is arranged at the bottom of the first heat exchange cavity of the first oil separator, one end interface of the oil return pipe is arranged at the bottom of the first heat exchange cavity, the input end and the output end of the first restrictor are respectively communicated with the oil return pipe and the first heat exchanger, and the output end of the first heat exchanger extends to the outside of the first oil separator and is communicated with a third interface. The oil device disclosed by the invention enables lubricating oil to be conveyed to the compressor through the oil return channel, and the oil device is reasonable in design.
Description
Technical Field
The present invention relates to a heat pump apparatus, and more particularly, to a heat pump system having an oil separator.
Background
The heat pump is a device for transferring heat energy of a low-level heat source to a high-level heat source, and is a new energy technology which is attracting attention worldwide. An oil content device is arranged in the heat pump system and is used for separating lubricating oil in high-pressure steam discharged by the refrigeration compressor so as to ensure that the device operates safely and efficiently. According to the oil separation principle of reducing the air flow speed and changing the air flow direction, oil particles in high-pressure steam are separated under the action of gravity. However, in the prior art, the oil device is installed on the high-pressure output side of the compressor, and the oil return effect of the oil device is not ideal, so that technical improvements are required for the oil device and the heat pump system thereof.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the heat pump system with the oil content device, which has the advantages of good oil return system, improved operation condition of the heat pump system and high efficiency.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides an oil device, this oil device is equipped with three interface at least, oil device includes first oil separator, oil content filter screen, first heat exchanger and first choke, and first heat exchanger and oil content filter screen are installed respectively from top to bottom to the inside first heat transfer cavity of first oil separator, and the one end intercommunication of first heat transfer cavity has first interface, and the below intercommunication of oil content filter screen has the second interface, and the oil return pipe is installed to first heat transfer cavity bottom of first oil separator, the one end interface setting of oil return pipe is in first heat transfer cavity bottom, and the input and the output of first choke communicate oil return pipe and first heat exchanger respectively, and the outside intercommunication that the output of first heat exchanger extends to first oil separator has the third interface.
Further, a multiple heat exchanger is installed below the first oil separator, the multiple heat exchanger is further provided with at least five interfaces, a fourth heat exchanger and a fifth heat exchanger are installed inside a second heat exchange cavity of the multiple heat exchanger, one end of the fourth heat exchanger is communicated with the second interface, the other end of the fourth heat exchanger is communicated with the outside of the multiple heat exchanger, a sixth interface is communicated with one end of the fifth heat exchanger, the other end of the fifth heat exchanger is communicated with the fourth interface, a fifth interface is communicated with the outside of the multiple heat exchanger, and two sides of the second heat exchange cavity are respectively communicated with an air return inlet and an air return outlet.
Further, the first oil separator and the multiple heat exchangers are of a unitary structure.
Further, the first restrictor is a capillary tube.
The invention also discloses a heat pump system with the oil content device, which comprises a compressor, a four-way valve, a second heat exchanger, a third heat exchanger and the oil content device;
the oil device comprises a first oil separator, an oil filter screen, a first heat exchanger and a first restrictor, wherein the first heat exchanger and the oil filter screen are respectively arranged in a first heat exchange cavity of the first oil separator from top to bottom;
the four interfaces of the four-way valve are respectively communicated with the high-pressure side of the compressor, the low-pressure side of the compressor, the second heat exchanger and the third heat exchanger, the other end of the second heat exchanger is communicated with the input end of the first one-way valve, and the output end of the first one-way valve is communicated with the first interface; the other end of the third heat exchanger is communicated with the input end of the second one-way valve, and the output end of the second one-way valve is communicated with the first interface; the second interface is communicated with one end of the second restrictor, and the other end of the second restrictor is divided into two paths which are respectively communicated with the input ends of the third check valve and the fourth check valve; the output ends of the third one-way valve and the fourth one-way valve are communicated with the input ends of the first one-way valve and the second one-way valve; the third port communicates with the low pressure side of the compressor.
The invention also discloses an enthalpy-increasing heat pump system with the oil content multiple heat exchange, which comprises a compressor, a four-way valve, a second heat exchanger, a third heat exchanger and an oil content device;
the oil device comprises a first oil separator, an oil filter screen, a first heat exchanger and a first restrictor, wherein the first heat exchanger and the oil filter screen are respectively arranged in a first heat exchange cavity of the first oil separator from top to bottom, one end of the first heat exchange cavity is communicated with the first connector, the lower part of the first heat exchange cavity of the oil filter screen is communicated with the second connector, an oil return pipe is arranged at the bottom of the first heat exchange cavity of the first oil separator, one end connector of the oil return pipe is arranged above the bottom of the first heat exchange cavity, the input end and the output end of the first restrictor are respectively communicated with the oil return pipe and the first heat exchanger, the other end connector of the oil return pipe is communicated with the first heat exchanger, the output end of the first heat exchanger extends to the outside of the first oil separator and is communicated with the third connector, and the first restrictor is communicated between the oil return pipe and the first heat exchanger;
the multiple heat exchangers are arranged below the first oil separator, at least five interfaces are further arranged in the multiple heat exchangers, a fourth heat exchanger and a fifth heat exchanger are arranged in a second heat exchange cavity of the multiple heat exchangers, one end of the fourth heat exchanger is communicated with the second interface, the other end of the fourth heat exchanger extends to the outside of the multiple heat exchangers to be communicated with a sixth interface, one end of the fifth heat exchanger is communicated with the fourth interface, the other end of the fifth heat exchanger extends to the outside of the multiple heat exchangers to be communicated with a fifth interface, and two sides of the second heat exchange cavity are respectively communicated with an air return inlet and an air return outlet;
the four interfaces of the four-way valve are respectively communicated with the high-pressure side of the compressor, the return air inlet, the second heat exchanger and the third heat exchanger, the other end of the second heat exchanger is communicated with the input end of the first one-way valve, and the output end of the first one-way valve is communicated with the first interface; the other end of the third heat exchanger is communicated with the input end of the second one-way valve, and the output end of the second one-way valve is communicated with the first interface; the second interface is communicated with one end of the second restrictor, and the other end of the second restrictor is divided into two paths which are respectively communicated with the input ends of the third check valve and the fourth check valve; the output ends of the third one-way valve and the fourth one-way valve are communicated with the input ends of the first one-way valve and the second one-way valve; the third port communicates with the low pressure side of the compressor.
Further, the fourth interface is communicated with the high-pressure side of the compressor through an electromagnetic valve, the sixth interface is communicated with the input end of the second restrictor, and the fifth interface is communicated with the first interface through the third restrictor.
Further, a fourth restrictor and an unloading valve are sequentially communicated between the return air outlet and the second restrictor.
By adopting the technical scheme, as the three interfaces on the oil content device are respectively connected into the heat pump system for use, the first interface and the second interface are matched and installed into the main refrigerant conveying loop, the oil content filter screen, the oil return pipe and the second interface on the oil return pipe are oil return loops, the refrigerant of the main loop is conveyed into the first heat exchange cavity through the first interface, and due to the heat exchange effect of the first heat exchanger in the first heat exchange cavity, the refrigerant in the first heat exchange cavity is cooled, so that the separation of lubricating oil and the refrigerant is facilitated, the lubricating oil is conveyed to the compressor through the oil return paths, and the oil content device is reasonable in design. In addition, the oil content device is applied to the heat pump system, so that the structure is reasonable, the lubricating oil loop of the heat pump system of the first heat exchanger in the oil return device is more sufficient in recovering lubricating oil, and the heat pump system is more stable in operation.
Drawings
FIG. 1 is a schematic diagram of an oil separator according to the present invention;
fig. 2 is a schematic structural view of a heat pump system with an oil device according to the present invention;
FIG. 3 is a schematic diagram of an improved structure of an oil device of the present invention with multiple heat exchangers installed;
fig. 4 is a schematic diagram of a heat pump system with oil multiple heat exchange and enthalpy increase according to the present invention.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, the oil device disclosed by the invention is provided with at least three interfaces A, B, C, the oil device comprises a first oil separator 18, an oil filter screen 31, a first heat exchanger 21 and a first restrictor 19, the first heat exchanger 21 and the oil filter screen 31 are respectively arranged in a first heat exchange cavity of the first oil separator 18 from top to bottom, one end of the first heat exchange cavity is communicated with a first interface a, the lower part of the oil filter screen 31 is communicated with a second interface B, the bottom of the first heat exchange cavity of the first oil separator 18 is provided with an oil return pipe 6, one end interface of the oil return pipe 6 is arranged at the bottom of the first heat exchange cavity, the input end and the output end of the first restrictor 19 are respectively communicated with the oil return pipe 6 and the first heat exchanger 21, and the outside of the first heat exchanger 21 extending to the first oil separator 18 is communicated with a third interface C. The main loop of the refrigerant is conveyed to the inside of the first heat exchange cavity through the first interface A, the oil is filtered through the oil filter screen 31, the lubricating oil is collected to the bottom of the first heat exchange cavity, a pipeline where the second interface B is located extends into the first heat exchange cavity, a port of the second interface B in the first heat exchange cavity is provided with two thirds of a gap between the oil filter screen 31 and the bottom of the first heat exchange cavity, and a port of the second interface B in the first heat exchange cavity is higher than the liquid level of the lubricating oil.
Because three interfaces on this oil content device insert the heat pump system respectively and use, first interface A, and second interface B cooperation installation are main refrigerant conveying circuit, oil content filter screen 23, return oil pipe 6 and the second interface B on the return oil pipe 6 are the return oil way, the refrigerant of main circuit is sent to first heat transfer intracavity portion through first interface A, because the bottom high pressure refrigerant and the lubricating oil mixture in the first heat transfer intracavity make its further condensation cooling with the refrigerant in the first heat transfer intracavity under the effect of first restrictor 19, be favorable to the separation of lubricating oil and refrigerant, guarantee the compressor return oil and improve the evaporimeter efficiency, oil content device reasonable in design.
In addition, as shown in fig. 3, the oil separator is further improved, a multiple heat exchanger 30 is installed below the first oil separator 18, at least five ports D, E, F, G, H are further provided on the multiple heat exchanger 30, a fourth heat exchanger 23 and a fifth heat exchanger 24 are installed inside a second heat exchange chamber of the multiple heat exchanger 30, one end of the fourth heat exchanger 23 is communicated with the second port B, the other end of the fourth heat exchanger 23 extends to the outside of the multiple heat exchanger 30 and is communicated with the sixth port F, one end of the fifth heat exchanger 24 is communicated with the fourth port D, the other end of the fifth heat exchanger extends to the outside of the multiple heat exchanger 30 and is communicated with the fifth port E, and both sides of the second heat exchange chamber are respectively communicated with an air return inlet H and an air return outlet G. The improved system further carries out evaporation heat exchange on the high-temperature and high-pressure refrigerant, so that the evaporation effect is better after throttling, meanwhile, the return air low-temperature refrigerant is used for heat exchange, the return air temperature of the refrigerant is improved, and the enthalpy value is increased again. In order to make the heat exchange effect between the first oil separator 18 and the multiple heat exchangers 30 more direct, the first oil separator 18 and the multiple heat exchangers 30 are of an integral structure, namely, only one shell is used for connection and isolation between the first oil separator 18 and the multiple heat exchangers 30, heat conduction is more direct, and heat exchange is more efficient.
In addition, in order to make the first heat exchanger 21 cool the mixture of refrigerant and lubricating oil effectively in the first heat exchange cavity, the first restrictor 19 is communicated between the oil return pipe 6 and the first heat exchanger 21, and in order not to affect the working condition of the main circuit of the heat pump system, the first restrictor 19 adopts a capillary tube with small pipe diameter.
As shown in fig. 2, the heat pump system with the oil content device disclosed by the invention comprises a compressor 1, a four-way valve 2, a second heat exchanger 3, a third heat exchanger 11 and the oil content device;
the oil device is provided with at least three interfaces A, B, C, the oil device comprises a first oil separator 18, an oil filter screen 31, a first heat exchanger 21 and a first restrictor 19, the first heat exchanger 21 and the oil filter screen 31 are respectively arranged in a first heat exchange cavity of the first oil separator 18 from top to bottom, one end of the first heat exchange cavity is communicated with a first interface A, the lower part of the oil filter screen 31 is communicated with a second interface B, an oil return pipe 6 is arranged at the bottom of the first heat exchange cavity of the first oil separator 18, one end interface of the oil return pipe 6 is arranged at the bottom of the first heat exchange cavity, the input end and the output end of the first restrictor 19 are respectively communicated with the oil return pipe 6 and the first heat exchanger 21, and the output end of the first heat exchanger 21 extends to the outside of the first oil separator 18 and is communicated with a third interface C;
the four interfaces of the four-way valve 2 are respectively communicated with the high-pressure side of the compressor 1, the low-pressure side of the compressor 1, the second heat exchanger 3 and the third heat exchanger 11, the other end of the second heat exchanger 3 is communicated with the input end of the first one-way valve 4, and the output end of the first one-way valve 4 is communicated with the first interface A; the other end of the third heat exchanger 11 is communicated with the input end of the second one-way valve 14, and the output end of the second one-way valve 14 is communicated with the first interface A; the second interface B is communicated with one end of the second restrictor 9, and the other end of the second restrictor 9 is divided into two paths which are respectively communicated with the input ends of the third check valve 10 and the fourth check valve 15; the output ends of the third check valve 10 and the fourth check valve 15 are communicated with the input ends of the first check valve 4 and the second check valve 14; the third interface C communicates with the low pressure side of the compressor 1. . The oil content device is applied to the heat pump system, so that the structure is reasonable, the lubricating oil loop of the heat pump system of the first heat exchanger in the oil return device is more sufficient in recovering lubricating oil, and the heat pump system is more stable in operation.
The working principle of the heat pump system is as follows:
when the heat pump system is used for heating water or refrigerating an air conditioner, the flow direction of the refrigerant of the main loop of the system is as follows: compressor 1→four-way valve 2→second heat exchanger 3 (heating water) →first check valve 4→first interface a→second interface b→second restrictor 9→third check valve 10→third heat exchanger 11 (air conditioning refrigeration) →four-way valve 2→compressor 1.
When the heat pump system is used for heating water or refrigerating air, after the lubricating oil mixed refrigerant enters the oil separation device from the first interface A, the lubricating oil is separated through the oil separation filter screen 31, the lubricating oil or the refrigerant mixture of the lubricating oil flows through the first throttle 19 from the oil return pipe 6, and enters the first heat exchanger 21 for internal and external heat exchange after being throttled and depressurized, so that the refrigerant entering the first heat exchange cavity from the first interface A is further cooled, and the refrigerant working condition is improved.
When the heat pump system heats in an air conditioner, the flow direction of the refrigerant of the main loop of the system is as follows: compressor 1- & gtfour-way valve 2- & gtthird heat exchanger 11- & gtsecond check valve 14- & gtfirst interface A- & gtsecond interface B- & gtsecond restrictor 9- & gtfourth check valve 15- & gtsecond heat exchanger 3- & gtfour-way valve 2- & gtcompressor 1.
When the heat pump system heats an air conditioner, after the lubricating oil mixed refrigerant enters the oil separation device from the first interface A, the lubricating oil is separated through the oil separation filter screen 31, the lubricating oil or the refrigerant mixture of the lubricating oil flows through the first throttle 19 from the oil return pipe 6, and enters the first heat exchanger 21 for internal and external heat exchange after being throttled and depressurized, and the refrigerant entering the first heat exchange cavity from the first interface A is further cooled, so that the refrigerant working condition is improved.
As shown in fig. 4, the invention also discloses an enthalpy-increasing heat pump system with oil content multiple heat exchange, which comprises a compressor 1, a four-way valve 2, a second heat exchanger 3, a third heat exchanger 11 and an oil content device;
the oil device is provided with at least three interfaces A, B, C, the oil device comprises a first oil separator 18, an oil filter screen 31, a first heat exchanger 21 and a first restrictor 19, the first heat exchanger 21 and the oil filter screen 31 are respectively arranged in a first heat exchange cavity of the first oil separator 18 from top to bottom, one end of the first heat exchange cavity is communicated with a first interface A, the lower part of the first heat exchange cavity of the oil filter screen 31 is communicated with a second interface B, an oil return pipe 6 is arranged at the bottom of the first heat exchange cavity of the first oil separator 18, one end interface of the oil return pipe 6 is arranged above the bottom of the first heat exchange cavity, the input end and the output end of the first restrictor 19 are respectively communicated with the oil return pipe 6 and the other end interface of the oil return pipe 6 of the first heat exchanger 21, the output end of the first heat exchanger 21 extends to the outside of the first oil separator 18 and is communicated with a third interface C, and the first restrictor 19 is communicated between the oil return pipe 6 and the first heat exchanger 21;
the lower part of the first oil separator 18 is provided with a multiple heat exchanger 30, the multiple heat exchanger 30 is also provided with at least five interfaces D, E, F, G, H, a fourth heat exchanger 23 and a fifth heat exchanger 24 are arranged in a second heat exchange cavity of the multiple heat exchanger 30, one end of the fourth heat exchanger 23 is communicated with a second interface B, the other end of the fourth heat exchanger extends to the outside of the multiple heat exchanger 30 and is communicated with a sixth interface F, one end of the fifth heat exchanger 24 is communicated with a fourth interface D, the other end of the fifth heat exchanger extends to the outside of the multiple heat exchanger 30 and is communicated with a fifth interface E, and two sides of the second heat exchange cavity are respectively communicated with an air return inlet H and an air return outlet G;
the four interfaces of the four-way valve 2 are respectively communicated with the high-pressure side of the compressor 1, the return air inlet H, the second heat exchanger 3 and the third heat exchanger 11, the other end of the second heat exchanger 3 is communicated with the input end of the first one-way valve 4, and the output end of the first one-way valve 4 is communicated with the first interface A; the other end of the third heat exchanger 11 is communicated with the input end of the second one-way valve 14, and the output end of the second one-way valve 14 is communicated with the first interface A; the second interface B is communicated with one end of the second restrictor 9, and the other end of the second restrictor 9 is divided into two paths which are respectively communicated with the input ends of the third check valve 10 and the fourth check valve 15; the output ends of the third check valve 10 and the fourth check valve 15 are communicated with the input ends of the first check valve 4 and the second check valve 14; the third interface C communicates with the low pressure side of the compressor 1.
Besides the advantage of being beneficial to separation of lubricating oil and refrigerants, the oil content device with the oil content multiple heat exchange is arranged to further evaporate and exchange the high-temperature and high-pressure refrigerants, so that the evaporation effect after throttling is better, meanwhile, the heat exchange of the low-temperature refrigerants is performed by the return air, the return air temperature of the refrigerants is improved, and the enthalpy value is increased again.
In addition, the fourth interface D is communicated with the high-pressure side of the compressor through the electromagnetic valve 25, the sixth interface F is communicated with the input end of the second restrictor 9, the fifth interface E is communicated with the first interface A through the third restrictor 29, under the low-temperature working condition, the electromagnetic valve 25 is opened, bypass exhaust high-temperature high-pressure gas of the compressor 1 enters the multiple heat exchanger 30 for multiple heat exchange, heat exchange with return low-temperature refrigerant is carried out, and the enthalpy value is increased by three times of evaporation.
The fourth restrictor 17 and the unloading valve 16 are also sequentially communicated between the return air outlet G and the second restrictor 9 of the oil-division multiple heat exchange enthalpy-increasing heat pump system, and when the compressor 1 is in ultra-high temperature load operation, the refrigerant output from the return air outlet G after being throttled by the fourth restrictor 17 is cooled, depressurized and then passes through the unloading valve 16, thereby playing the roles of depressurization and load reduction.
The working principle of the oil-division multiple heat exchange enthalpy-increasing heat pump system is as follows:
when the heat pump system is used for heating water or refrigerating an air conditioner, the flow direction of the refrigerant of the main loop of the system is as follows: compressor 1- & gtfour-way valve 2- & gtsecond heat exchanger 3 (heating water) & gtfirst check valve 4- & gtfirst interface A- & gtsecond interface B- & gtfourth heat exchanger 23- & gtsixth interface F- & gtsecond restrictor 9- & gtthird check valve 10- & gtthird heat exchanger 11 (air conditioning refrigeration) & gtfour-way valve 2- & gtcompressor 1.
When the heat pump system is used for heating water or refrigerating air, after the lubricating oil mixed refrigerant enters the oil separation device from the first interface A, the lubricating oil is separated through the oil separation filter screen 31, the lubricating oil or the refrigerant mixture of the lubricating oil flows through the first throttle 19 from the oil return pipe 6, and enters the first heat exchanger 21 for internal and external heat exchange after being throttled and depressurized, so that the refrigerant entering the first heat exchange cavity from the first interface A is further cooled, and the refrigerant working condition is improved.
When the heat pump system heats in an air conditioner, the flow direction of the refrigerant of the main loop of the system is as follows: compressor 1- & gtfour-way valve 2- & gtthird heat exchanger 11- & gtsecond check valve 14- & gtfirst interface A- & gtsecond interface B- & gtfourth heat exchanger 23- & gtsixth interface F- & gtsecond restrictor 9- & gtfourth check valve 15- & gtsecond heat exchanger 3- & gtfour-way valve 2- & gtcompressor 1.
When the heat pump system heats an air conditioner, after the lubricating oil mixed refrigerant enters the oil separation device from the first interface A, the lubricating oil is separated through the oil separation filter screen 31, the lubricating oil or the refrigerant mixture of the lubricating oil flows through the first throttle 19 from the oil return pipe 6, and enters the first heat exchanger 21 for internal and external heat exchange after being throttled and depressurized, and the refrigerant entering the first heat exchange cavity from the first interface A is further cooled, so that the refrigerant working condition is improved.
Low temperature working condition return air enthalpy increasing loop: compressor 1→solenoid valve 25→fourth interface d→fifth heat exchanger 24→third restrictor 29→first interface a. The loop bypasses the high-pressure high-temperature gas of exhaust gas from the compressor 1 to enter the second separator 30 to exchange heat with the low-temperature refrigerant of return gas under the low-temperature working condition, and the enthalpy value of the system is improved by multiple evaporation.
The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, and yet fall within the scope of the invention.
Claims (8)
1. An oil separator, characterized in that: the oil device is provided with at least three interfaces (A, B, C), the oil device comprises a first oil separator (18), an oil filter screen (31), a first heat exchanger (21) and a first restrictor (19), the first heat exchanger (21) and the oil filter screen (31) are respectively arranged in the first heat exchange cavity of the first oil separator (18) from top to bottom, one end of the first heat exchange cavity is communicated with a first interface (A), the lower part of the oil filter screen (31) is communicated with a second interface (B), the port of the second interface (B) in the first heat exchange cavity is higher than the liquid level of lubricating oil, an oil return pipe (6) is arranged at the bottom of the first heat exchange cavity of the first oil separator (18), one end interface of the oil return pipe (6) is arranged at the bottom of the first heat exchange cavity, the input end and the output end of the first restrictor (19) are respectively communicated with the oil return pipe (6) and the first heat exchanger (21), and the output end of the first heat exchanger (21) extends to the outside of the first oil separator (18) to be communicated with a third interface (C).
2. The oil separator according to claim 1, wherein: the utility model discloses a heat pump, including multiple heat exchanger (30), second heat transfer chamber internally mounted of multiple heat exchanger (30) has fourth heat exchanger (23) and fifth heat exchanger (24), the one end and the second interface (B) of fourth heat exchanger (23) communicate, the outside intercommunication that the other end extends to multiple heat exchanger (30) has sixth interface (F), the one end and fourth interface (D) intercommunication of fifth heat exchanger (24), the outside intercommunication that the other end extends to multiple heat exchanger (30) has fifth interface (E), the both sides in second heat transfer chamber communicate respectively has return air inlet (H) and return air export (G).
3. An oil device according to claim 2, wherein: the first oil separator (18) and the multiple heat exchangers (30) are of unitary construction.
4. The oil separator according to claim 1, wherein: the first restrictor (19) is a capillary tube.
5. A heat pump system having an oil device, characterized in that: comprises a compressor (1), a four-way valve (2), a second heat exchanger (3), a third heat exchanger (11) and an oil device;
the oil separator is at least provided with three interfaces (A, B, C), the oil separator comprises a first oil separator (18), an oil filter screen (31), a first heat exchanger (21) and a first restrictor (19), the first heat exchanger (21) and the oil filter screen (31) are respectively arranged in the first heat exchange cavity of the first oil separator (18) from top to bottom, one end of the first heat exchange cavity is communicated with a first interface (A), the lower part of the oil filter screen (31) is communicated with a second interface (B), the port of the second interface (B) in the first heat exchange cavity is higher than the liquid level of lubricating oil, an oil return pipe (6) is arranged at the bottom of the first heat exchange cavity of the first oil separator (18), one end interface of the oil return pipe (6) is arranged at the bottom of the first heat exchange cavity, the input end and the output end of the first restrictor (19) are respectively communicated with the oil return pipe (6) and the first heat exchanger (21), and the output end of the first heat exchanger (21) extends to the outside of the first heat exchanger (18) and is communicated with a third interface (C);
four interfaces of the four-way valve (2) are respectively communicated with a high-pressure side of the compressor (1), a low-pressure side of the compressor (1), a second heat exchanger (3) and a third heat exchanger (11), the other end of the second heat exchanger (3) is communicated with the input end of the first one-way valve (4), and the output end of the first one-way valve (4) is communicated with the first interface (A); the other end of the third heat exchanger (11) is communicated with the input end of the second one-way valve (14), and the output end of the second one-way valve (14) is communicated with the first interface (A); the second interface (B) is communicated with one end of the second restrictor (9), and the other end of the second restrictor (9) is divided into two paths which are respectively communicated with the input ends of the third check valve (10) and the fourth check valve (15); the output ends of the third check valve (10) and the fourth check valve (15) are communicated with the input ends of the first check valve (4) and the second check valve (14); the third interface (C) communicates with the low pressure side of the compressor (1).
6. An enthalpy-increasing heat pump system with oil content multiple heat exchange, which is characterized in that: comprises a compressor (1), a four-way valve (2), a second heat exchanger (3), a third heat exchanger (11) and an oil device;
the oil device is provided with at least three interfaces (A, B, C), the oil device comprises a first oil separator (18), an oil filter screen (31), a first heat exchanger (21) and a first restrictor (19), the first heat exchanger (21) and the oil filter screen (31) are respectively arranged in the first heat exchange cavity of the first oil separator (18) from top to bottom, one end of the first heat exchange cavity is communicated with a first interface (A), a second interface (B) is communicated below the first heat exchange cavity at the lower part of the oil filter screen (31), the port of the second interface (B) in the first heat exchange cavity is higher than the liquid level of lubricating oil, an oil return pipe (6) is arranged at the bottom of the first heat exchange cavity of the first oil separator (18), one end interface of the oil return pipe (6) is arranged above the bottom of the first heat exchange cavity, the input end and the output end of the first restrictor (19) are respectively communicated with the oil return pipe (6) and the first heat exchanger (21), the other end interface of the oil return pipe (6) is communicated with the first heat exchanger (21), and the output end of the first heat exchanger (21) extends to the first heat exchanger (18) and is communicated with the first restrictor (19);
a multiple heat exchanger (30) is arranged below the first oil separator (18), the multiple heat exchanger (30) is also provided with at least five interfaces (D, E, F, G, H), a fourth heat exchanger (23) and a fifth heat exchanger (24) are arranged in a second heat exchange cavity of the multiple heat exchanger (30), one end of the fourth heat exchanger (23) is communicated with the second interface (B), the other end of the fourth heat exchanger extends to the outside of the multiple heat exchanger (30) to be communicated with a sixth interface (F), one end of the fifth heat exchanger (24) is communicated with the fourth interface (D), the other end of the fifth heat exchanger extends to the outside of the multiple heat exchanger (30) to be communicated with a fifth interface (E), and two sides of the second heat exchange cavity are respectively communicated with an air return inlet (H) and an air return outlet (G);
four interfaces of the four-way valve (2) are respectively communicated with a high-pressure side of the compressor (1), an air return inlet (H), a second heat exchanger (3) and a third heat exchanger (11), the other end of the second heat exchanger (3) is communicated with the input end of the first one-way valve (4), and the output end of the first one-way valve (4) is communicated with the first interface (A); the other end of the third heat exchanger (11) is communicated with the input end of the second one-way valve (14), and the output end of the second one-way valve (14) is communicated with the first interface (A); the second interface (B) is communicated with one end of the second restrictor (9), and the other end of the second restrictor (9) is divided into two paths which are respectively communicated with the input ends of the third check valve (10) and the fourth check valve (15); the output ends of the third check valve (10) and the fourth check valve (15) are communicated with the input ends of the first check valve (4) and the second check valve (14); the third interface (C) communicates with the low pressure side of the compressor (1).
7. The heat pump system with oil multiple heat exchange and enthalpy addition according to claim 6, characterized in that: the fourth interface (D) is communicated with the high-pressure side of the compressor through a solenoid valve (25), the sixth interface (F) is communicated with the input end of the second restrictor (9), and the fifth interface (E) is communicated with the first interface (A) through a third restrictor (29).
8. The heat pump system with oil multiple heat exchange and enthalpy addition according to claim 6, characterized in that: a fourth restrictor (17) and an unloading valve (16) are also communicated between the return air outlet (G) and the second restrictor (9) in sequence.
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| CN109489294B (en) * | 2018-11-19 | 2023-05-26 | 佛山市德天电器有限公司 | Multifunctional oil content device with system enthalpy increasing function and heat pump system thereof |
| CN110486995A (en) * | 2019-09-04 | 2019-11-22 | 佛山市德天电器有限公司 | A kind of oil liquid separator and the heat pump system with oil liquid separator |
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