阅读说明：本技术 利用低温空气中的热量的方法 (Method for utilizing heat in low-temperature air ) 是由 袁成利 李佳育 于 2021-09-27 设计创作，主要内容包括：本发明涉及环保制冷领域,尤其涉及利用低温空气中的热量的方法。利用高效能制热的空气能热泵机组,机组包含第一媒介换热部分和第二媒介换热部分；第一媒介换热部分先从冷空气中进行第一级换热；第一级换热后被加热的介质在冷凝蒸发换热器中对第二媒介换热部分中的介质进行加热；经过阶梯式加热,经过冷凝蒸发换热器实现热量的释放。有益效果：功能多样,安全、高效、低碳；能够在极寒情况下使用。(The invention relates to the field of environment-friendly refrigeration, in particular to a method for utilizing heat in low-temperature air. The air energy heat pump unit comprises a first medium heat exchange part and a second medium heat exchange part; the first medium heat exchange part firstly carries out first-stage heat exchange from cold air; the medium heated after the first-stage heat exchange heats the medium in the second medium heat exchange part in the condensing-evaporating heat exchanger; the heat is released through the stepped heating and the condensing and evaporating heat exchanger. Has the advantages that: the functions are various, and the method is safe, efficient and low-carbon; can be used under extremely cold conditions.)

1. The method for utilizing heat in low-temperature air is characterized in that a high-efficiency heating air energy heat pump unit is utilized, and the heat pump unit comprises a first medium heat exchange part and a second medium heat exchange part;

the first medium heat exchange part comprises an air heat pump part fan (1), an air outlet part of the air heat pump part fan (1) faces to the fin evaporator (3), and a first liquid storage device (12) extends out of a pipeline and is connected with a first main electronic expansion valve (9) and then is connected with the fin evaporator (3); the pipeline where the first main electronic expansion valve (9) is located is parallel to a pipeline, and a capillary tube (10) and a throttle bypass valve (11) are arranged on the pipeline; the fin evaporator (3) extends out of a pipeline and is connected with a four-way valve I (5), and the other three paths of the four-way valve I (5) are respectively connected with a gas-liquid separation device (4), a direct-current variable-frequency compressor (6) and a condensation evaporation heat exchanger (7); the lower part of the condensation evaporation heat exchanger (7) is connected with a first liquid storage device (12) through a pipeline;

the second medium heat exchange part comprises a second liquid storage device (16), and the second liquid storage device (16) is connected with the condensation evaporation heat exchanger (7) through a second main electronic expansion valve (15); the second liquid storage device (16) is also connected with a finned heat exchanger (18), the finned heat exchanger (18) extends out of a pipeline and is connected with a second four-way valve (13), and other three pipelines of the second four-way valve (13) are respectively connected with the condensing-evaporating heat exchanger (7), the gas-liquid separator (17) and the high-temperature fixed-frequency press (14); a hot air supply fan (19) is arranged on the side of the condensing-evaporating heat exchanger (7);

comprises the following steps;

the first medium heat exchange part firstly carries out first-stage heat exchange from cold air;

the medium heated after the first-stage heat exchange heats the medium in the second medium heat exchange part in the condensing-evaporating heat exchanger (7);

the heat is released through the stepwise heating and the condensing-evaporating heat exchanger (7).

2. A method of utilising the heat of cryogenic air as claimed in claim 1 characterised in that the condensing evaporative heat exchanger (7) and the heat supply fan (19) are located in a relatively separate housing to avoid the cold air affecting the heated material and the secondary heat exchange area.

3. The method of utilizing heat in low temperature air as claimed in claim 1, wherein the thermal insulation walls (20) divide the overall housing into two groups such that air circulation between the two groups does not cause internal heat loss.

4. The method of utilizing heat in cryogenic air of claim 1, wherein the selection of media is accomplished by alternatively opening both reservoir two (16) and third media container (161); the selection mode is controlled by a tee joint (24); the media in the second liquid storage device (16) and the third media container (161) are different, one of the media is water, when the media is water, the media can supply hot water to the room after being heated, and the hot air supply machine (19) can be turned off or not, and the purpose of the turning off is to supply hot water; when the medium is non-aqueous, the hot air supplier (19) outputs hot air to the indoor space.

5. A method of utilizing heat in cryogenic air as claimed in claim 4 wherein an evacuation vessel (23) is connected to the conduit from which the finned heat exchanger (18) extends, the evacuation vessel (23) being capable of drawing media from the conduit; when the second liquid storage device (16) and the third medium container (161) are converted and compressed to realize secondary heat exchange, the medium is firstly pumped out from the pipeline, and then the three-way valve is converted to realize medium conversion, so that the heating of water or the pumping of hot air by a hot water pump is realized.

Technical Field

The invention relates to the field of environment-friendly refrigeration, in particular to a method for utilizing heat in low-temperature air.

Background

Air-source heat pumps are the latest heat pump technology at present, but they are single acting, not flexible enough to be used and not well suited for very low temperatures.

The defrosting capacity of the air source heat pump unit is easily weakened at a lower temperature, the air density capable of being sucked is reduced due to the fact that the air suction of the unit is too small, and the thickness of a frost layer is higher and higher along with the accumulation of time. Therefore, the unit has a reduced air-conditioning capacity, and the circulation amount of the refrigerant is reduced, thereby reducing the overall heating capacity.

Disclosure of Invention

The purpose of the invention is as follows: in order to provide a method for utilizing heat in low-temperature air with better effect, the specific purpose is seen in a plurality of substantial technical effects of the specific implementation part.

In order to achieve the purpose, the invention adopts the following technical scheme:

the first scheme is as follows:

the high-efficiency heating air energy heat pump unit is characterized by comprising a first medium heat exchange part and a second medium heat exchange part;

the first medium heat exchange part comprises an air heat pump part fan 1, an air outlet part of the air heat pump part fan 1 faces the fin evaporator 3, and a first liquid storage device 12 extends out of a pipeline and is connected with a first main electronic expansion valve 9 and then is connected with the fin evaporator 3; the pipeline where the first main electronic expansion valve 9 is located is parallel to a pipeline, and a capillary tube 10 and a throttle bypass valve 11 are arranged on the pipeline; the fin evaporator 3 extends out of a pipeline and is connected with a four-way valve I5, and the other three paths of the four-way valve I5 are respectively connected with a gas-liquid separation device 4, a direct-current variable-frequency compressor 6 and a condensation evaporation heat exchanger 7; the lower part of the condensation and evaporation heat exchanger 7 is connected with a first liquid storage device 12 through a pipeline;

the second medium heat exchange part comprises a second liquid storage device 16, and the second liquid storage device 16 is connected with the condensation evaporation heat exchanger 7 through a second main electronic expansion valve 15; the second liquid storage device 16 is also connected with a fin heat exchanger 18, the extended pipeline of the fin heat exchanger 18 is connected with a second four-way valve 13, and other three pipelines of the second four-way valve 13 are respectively connected with the condensing-evaporating heat exchanger 7, the gas-liquid separator 17 and the high-temperature fixed-frequency compressor 14; a hot air supply blower 19 is arranged at the side of the condensing-evaporating heat exchanger 7.

The invention further adopts the technical scheme that an environmental temperature sensor 2 and a fin temperature sensing probe 8 are arranged on the fin evaporator 3.

The invention further adopts the technical scheme that the air heat pump part fan 1 and the finned evaporator 3 are positioned in a relatively independent shell which is positioned in the shell of the whole system; the air heat pump part fan 1 is communicated with the outside.

The further technical proposal of the invention is that the condensing-evaporating heat exchanger 7 and the heat supply fan 19 are positioned in a relatively independent shell which is positioned in the shell of the whole system; the heat supply blower 19 is directed indoors.

The further technical scheme of the invention is that the relatively independent shell where the air heat pump part fan 1 and the finned evaporator 3 are located and the relatively independent shell where the condensation evaporation heat exchanger 7 and the heat supply fan 19 are located are all made of heat insulation materials.

The invention has the further technical scheme that a low-boiling-point working medium which can exchange heat from low-temperature air according to the 'reverse Carnot' principle is placed in the liquid storage device I12; the first medium heat exchange part can realize first-stage heat exchange.

The further technical proposal of the invention is that the shell of the condensation evaporation heat exchanger 7 is connected with a heat preservation wall 20; the heat preservation wall divides the whole shell into two groups.

The invention has the further technical scheme that a third medium container 161 is arranged on the side of the second 16 side of the liquid storage device, and a pipeline on the third medium container 161 is connected to the second medium heat exchange part through a tee joint 24; the second reservoir 16 and the third medium container 161 are alternatively opened to realize the selection of the medium; the alternative is controlled by tee 24.

The invention further adopts the technical scheme that one medium of the second liquid reservoir 16 and the third medium container 161 is water; the water can be discharged for indoor use after heat exchange.

The invention further adopts the technical scheme that an evacuation container 23 is connected to a pipeline extending out of the fin heat exchanger 18, and the evacuation container 23 can pump media out of the pipeline.

Scheme II:

the method for utilizing heat in low-temperature air is characterized in that a high-efficiency heating air energy heat pump unit is utilized, and the heat pump unit comprises a first medium heat exchange part and a second medium heat exchange part;

the first medium heat exchange part comprises an air heat pump part fan 1, an air outlet part of the air heat pump part fan 1 faces the fin evaporator 3, and a first liquid storage device 12 extends out of a pipeline and is connected with a first main electronic expansion valve 9 and then is connected with the fin evaporator 3; the pipeline where the first main electronic expansion valve 9 is located is parallel to a pipeline, and a capillary tube 10 and a throttle bypass valve 11 are arranged on the pipeline; the fin evaporator 3 extends out of a pipeline and is connected with a four-way valve I5, and the other three paths of the four-way valve I5 are respectively connected with a gas-liquid separation device 4, a direct-current variable-frequency compressor 6 and a condensation evaporation heat exchanger 7; the lower part of the condensation and evaporation heat exchanger 7 is connected with a first liquid storage device 12 through a pipeline;

the second medium heat exchange part comprises a second liquid storage device 16, and the second liquid storage device 16 is connected with the condensation evaporation heat exchanger 7 through a second main electronic expansion valve 15; the second liquid storage device 16 is also connected with a fin heat exchanger 18, the extended pipeline of the fin heat exchanger 18 is connected with a second four-way valve 13, and other three pipelines of the second four-way valve 13 are respectively connected with the condensing-evaporating heat exchanger 7, the gas-liquid separator 17 and the high-temperature fixed-frequency compressor 14; a hot air supply fan 19 is arranged on the side of the condensing-evaporating heat exchanger 7;

comprises the following steps;

the first medium heat exchange part firstly carries out first-stage heat exchange from cold air;

the medium heated after the first-stage heat exchange heats the medium in the second medium heat exchange part in the condensing-evaporating heat exchanger 7;

the heat is released through the stepwise heating and the condensing-evaporating heat exchanger 7.

The further technical scheme of the invention is that the condensing-evaporating heat exchanger 7 and the heat supply fan 19 are arranged in a relatively independent shell to avoid the influence of cold air on heated substances and a second-stage heat exchange area.

The further technical scheme of the invention is that the heat-insulating wall 20 divides the whole shell into two groups, so that air circulation between the two groups does not cause internal heat loss.

The invention further adopts the technical scheme that the second liquid storage device 16 and the third medium container 161 are alternatively opened to realize the selection of the medium; the selection is controlled by a tee 24; the second reservoir 16 and the third medium container 161 are different media, one of which is water, when the medium is water, the heated medium can supply hot water to the room, and the hot air supply fan 19 can be turned off or not, and the purpose of the turning off is to supply hot water; when the medium is a non-aqueous medium, the heating fan 19 outputs hot air to the indoor space.

The invention further adopts the technical scheme that an evacuation container 23 is connected to a pipeline extending out of the fin heat exchanger 18, and the evacuation container 23 can pump out media from the pipeline; when the second liquid storage device 16 and the third medium container 161 are converted and compressed to realize secondary heat exchange, the medium is firstly pumped out from the pipeline, and then the three-way valve is converted to realize medium conversion, so that the heating of water or the pumping of hot air by the hot water pump is realized.

Compared with the prior art, the invention adopting the technical scheme has the following beneficial effects: the functions are various, and the method is safe, efficient and low-carbon; can be used under extremely cold conditions.

Drawings

To further illustrate the present invention, further description is provided below with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of the inventive structure;

FIG. 2 is a schematic view of the air intake section in a relatively separate housing;

FIG. 3 is a schematic view of the air outlet portion in a relatively separate housing;

FIG. 4 is a structural improvement of the invention;

FIG. 5 is a further development of this patent;

FIG. 6 is a further improved view of the present patent;

wherein: 1. an air heat pump part fan; 2. an ambient temperature sensor; 3. a finned evaporator; 4. a gas-liquid separation device; 5. a first four-way valve; 6. a direct current variable frequency compressor; 7. a condensing and evaporating heat exchanger; 8. a fin temperature sensing probe; 9. a first main electronic expansion valve; 10. a capillary tube; 11. a throttle bypass valve; 12. a first liquid storage device; 13. a four-way valve II; 14. a high-temperature fixed-frequency press; 15. a second main electronic expansion valve; 16. a second liquid storage device; 17. a gas-liquid separator; 18. a finned heat exchanger; 19. a hot air supply fan; 20. a heat preservation wall; 21. a filter; 161. a third medium container; 23. evacuating the container; 24. and a tee joint.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The patent provides a plurality of parallel schemes, and different expressions belong to an improved scheme based on a basic scheme or a parallel scheme. Each solution has its own unique features. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The fixing means, which is not described herein, may be any one of screw fixing, bolt fixing, or glue bonding.

The first embodiment is as follows: with reference to all of the accompanying drawings; the high-efficiency heating air energy heat pump unit is characterized by comprising a first medium heat exchange part and a second medium heat exchange part;

the first medium heat exchange part comprises an air heat pump part fan 1, an air outlet part of the air heat pump part fan 1 faces the fin evaporator 3, and a first liquid storage device 12 extends out of a pipeline and is connected with a first main electronic expansion valve 9 and then is connected with the fin evaporator 3; the pipeline where the first main electronic expansion valve 9 is located is parallel to a pipeline, and a capillary tube 10 and a throttle bypass valve 11 are arranged on the pipeline; the fin evaporator 3 extends out of a pipeline and is connected with a four-way valve I5, and the other three paths of the four-way valve I5 are respectively connected with a gas-liquid separation device 4, a direct-current variable-frequency compressor 6 and a condensation evaporation heat exchanger 7; the lower part of the condensation and evaporation heat exchanger 7 is connected with a first liquid storage device 12 through a pipeline;

the second medium heat exchange part comprises a second liquid storage device 16, and the second liquid storage device 16 is connected with the condensation evaporation heat exchanger 7 through a second main electronic expansion valve 15; the second liquid storage device 16 is also connected with a fin heat exchanger 18, the extended pipeline of the fin heat exchanger 18 is connected with a second four-way valve 13, and other three pipelines of the second four-way valve 13 are respectively connected with the condensing-evaporating heat exchanger 7, the gas-liquid separator 17 and the high-temperature fixed-frequency compressor 14; a hot air supply blower 19 is arranged at the side of the condensing-evaporating heat exchanger 7. The technical scheme of the invention has the following substantial technical effects and the realization process: a method of utilizing heat in low temperature air, characterized in that,

comprises the following steps; the first medium heat exchange part firstly carries out first-stage heat exchange from cold air;

the medium heated after the first-stage heat exchange heats the medium in the second medium heat exchange part in the condensing-evaporating heat exchanger 7; the heat is released through the stepwise heating and the condensing-evaporating heat exchanger 7.

Creatively, the above effects exist independently, and the combination of the above results can be completed by a set of structure.

Example two: as a further development, or a parallel development or an alternative independent development, the fin evaporator 3 is provided with an ambient temperature sensor 2 and a fin temperature-sensing probe 8. The technical scheme of the invention has the following substantial technical effects and the realization process: preferably, an aviation-grade temperature acquisition probe is adopted to ensure the acquisition accuracy of the whole temperature system and ensure the high-efficiency heat output of the machine.

Example three: as a further development or in parallel or alternatively independently, the air heat pump section fan 1 and the finned evaporator 3 are located in a relatively separate housing located in the housing of the overall system; the air heat pump part fan 1 is communicated with the outside. The technical scheme of the invention has the following substantial technical effects and the realization process: the air flow in the first-stage heat exchange can not influence the second-stage heat exchange.

Example four: as a further development or in parallel or alternatively independently, the condensing-evaporating heat exchanger 7 and the heat supply fan 19 are located in a relatively separate housing which is located in the housing of the entire system; the heat supply blower 19 is directed indoors. The technical scheme of the invention has the following substantial technical effects and the realization process: the air flow in the second-stage heat exchange can not be influenced by the first-stage heat exchange.

Example five: as a further improvement scheme or a parallel scheme or an alternative independent scheme, the relatively independent shell where the air heat pump part fan 1 and the finned evaporator 3 are arranged and the relatively independent shell where the condensing-evaporating heat exchanger 7 and the heat supply fan 19 are arranged are made of heat insulation materials. The technical scheme of the invention has the following substantial technical effects and the realization process: the adiabatic material can avoid the air current heat transfer to cause the influence to this patent. The condensing-evaporating heat exchanger 7 and the heat supply fan 19 are arranged in a relatively independent shell to avoid the influence of cold air on the heated substances and the second-stage heat exchange area.

Example six: as a further improved scheme or a parallel scheme or an optional independent scheme, a low-boiling-point working medium capable of exchanging heat from low-temperature air according to the 'reverse Carnot' principle is placed in the liquid storage device I12; the first medium heat exchange part can realize first-stage heat exchange.

Example seven: as a further development or a parallel development or an alternative independent development, the shell of the condensing-evaporating heat exchanger 7 is connected to a heat-insulating wall 20; the heat preservation wall divides the whole shell into two groups. The technical scheme of the invention has the following substantial technical effects and the realization process: the two-stage heat exchange can be prevented from influencing each other. The insulating walls 20 divide the overall housing into two groups so that air circulation between the two groups does not cause internal heat loss.

Example eight: as a further improvement scheme or a parallel scheme or an optional independent scheme, a third medium container 161 is arranged at the side of the second 16 side of the liquid storage device, and a pipeline on the third medium container 161 is connected to the second medium heat exchange part through a tee 24; the second reservoir 16 and the third medium container 161 are alternatively opened to realize the selection of the medium; the alternative is controlled by tee 24. The technical scheme of the invention has the following substantial technical effects and the realization process: the second reservoir 16 and the third medium container 161 are alternatively opened to realize the selection of the medium; the selection is controlled by a tee 24; the second reservoir 16 and the third medium container 161 are different media, one of which is water, when the medium is water, the heated medium can supply hot water to the room, and the hot air supply fan 19 can be turned off or not, and the purpose of the turning off is to supply hot water; when the medium is a non-aqueous medium, the heating fan 19 outputs hot air to the indoor space.

Example nine: as a further modification or a parallel or optionally independent solution, one of the media of the second reservoir 16 and the third media container 161 is water; the water can be discharged for indoor use after heat exchange. The technical scheme of the invention has the following substantial technical effects and the realization process: can heat water and supply indoor hot water.

Example ten: as a further development or in parallel or alternatively independently, an evacuation vessel 23 is connected to the pipe from which the fin heat exchanger 18 projects, the evacuation vessel 23 being able to draw off the medium from the pipe. The technical scheme of the invention has the following substantial technical effects and the realization process: after the medium has been withdrawn, the injection of another medium can take place. An evacuation container 23 is connected to a pipeline extending out of the fin heat exchanger 18, and the evacuation container 23 can draw media from the pipeline; when the second liquid storage device 16 and the third medium container 161 are converted and compressed to realize secondary heat exchange, the medium is firstly pumped out from the pipeline, and then the three-way valve is converted to realize medium conversion, so that the heating of water or the pumping of hot air by the hot water pump is realized.

The extremely cold air source heat pump has good heating effect under the condition of-50 ℃ in northern cold regions and is not restricted by low-temperature environment. Under the condition that the temperature of a region is 25 ℃ below zero, the heating efficiency of the conventional air source heat pump is greatly reduced, so that the use area of the air source heat pump must be considered when the air source heat pump is selected in the northeast and northwest regions of China.

The extremely cold air source heat pump adopts an autonomous six-core technology, stably operates at the temperature of minus 50 ℃ of the environmental temperature, and has the energy efficiency ratio of 1: 2.1. The deep freezing technology is combined with the modern heat pump technology, the high-efficiency heating at the temperature of minus 50 ℃ is really realized by a precise variable-frequency capacity-regulating technology and a positive temperature coefficient low-temperature data acquisition technology, and a new refrigerant blending technology and a variable-frequency capacity-regulating defrosting technology, and hot water with the temperature of more than 50 ℃ is produced.

An extremely cold air source heat pump adopts an enhanced vapor injection compressor under the working conditions that the outdoor temperature is-50 ℃ and the condensation temperature is 43 ℃. The air source main engine can still stably run under a large compression ratio, and cannot be stopped due to overheating of the air source main engine.

The extremely cold air source heat pump has the heating efficiency 30% higher than that of the conventional heat pump at low temperature, the comprehensive energy efficiency ratio of about 2.1 at minus 50 ℃, and is more energy-saving when used at low temperature than that of the conventional heat pump.

Has the advantages that:

1. the lowest lower limit of the use environment can reach-60 ℃ by combining a complete deep cooling technical scheme with a high-temperature heat pump technology;

2. the electronic control adopts a precise constant temperature system to ensure that the electronic control system stably operates without failure under the working condition of extremely cold environmental temperature;

3. the patent environment-friendly medical refrigerant is adopted, so that the method is safe, efficient and low-carbon; of course, the types of the refrigerants can be replaced, and similar refrigerants capable of realizing the air heat pump are all in the protection range of the patent.

4. The high-speed defrosting technology is adopted, and the problem that the conventional air can not be defrosted normally under the extremely cold working condition is effectively solved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is to be limited to the embodiments described above.