CN113932470A - High-temperature heat pump circulating system - Google Patents
High-temperature heat pump circulating system Download PDFInfo
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- CN113932470A CN113932470A CN202111286116.2A CN202111286116A CN113932470A CN 113932470 A CN113932470 A CN 113932470A CN 202111286116 A CN202111286116 A CN 202111286116A CN 113932470 A CN113932470 A CN 113932470A
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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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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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
- F25B41/30—Expansion means; Dispositions thereof
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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
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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Abstract
The invention discloses a high-temperature heat pump circulating system, and relates to the field of heat pumps. The high-temperature heat pump circulating system comprises an output heat pump circulating unit and a gas separating device; the output heat pump circulating unit comprises a boosting pipeline, a pressure reducing pipeline, a first compression device, a first expansion device, a second expansion device, a first working medium, a condensation evaporation device and a high-temperature condensation device, wherein the gas separation device is arranged on the pressure reducing pipeline and between the first expansion device and the second expansion device, so that the gas pressure in the gas separation device is conveniently adjusted to a state slightly higher than the air pressure of the external environment, and the gas in the circulating pipeline is smoothly and efficiently discharged to the external environment.
Description
Technical Field
The invention relates to the field of heat pumps, in particular to a high-temperature heat pump circulating system.
Background
The heat pump is used for transferring heat energy to the high-temperature heat source after the heat energy is heated from the low-temperature heat source, and the heat energy absorbed by the low-temperature heat exchanger is output to the outside at the high-temperature heat exchanger with higher temperature after the heat energy is circularly heated by the heat pump.
In the prior art, the heat output temperature of the heat pump is not high, and the use effect is not ideal.
Disclosure of Invention
The invention provides a high-temperature heat pump circulating system, which adjusts the gas pressure in a gas separation device to be slightly higher than the air pressure of the external environment, and the gas separation device can stably and efficiently discharge the air entering a negative pressure pipeline to the external environment, so that the high-temperature heat pump circulating system can stably and efficiently output high-temperature heat energy compared with the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the present invention provides a high temperature heat pump cycle system, comprising:
an output heat pump cycle unit; the output heat pump circulating unit comprises a boosting pipeline, a pressure reducing pipeline, a first compression device, a first expansion device, a second expansion device, a first working medium, a condensation evaporation device and a high-temperature condensation device; the first working medium circulates in the output heat pump circulating unit; the first compression device is arranged on the pressure rising pipeline, the first expansion device and the second expansion device are arranged on the pressure reducing pipeline, the high-temperature condensation device is arranged between the tail end of the pressure rising pipeline and the head end of the pressure reducing pipeline, and the condensation evaporation device is arranged between the tail end of the pressure reducing pipeline and the head end of the pressure rising pipeline; the first compression device is communicated with the pressure increasing pipeline, and the first expansion device and the second expansion device are communicated with the pressure decreasing pipeline; the head end of the pressure boosting pipeline is communicated with the condensing and evaporating device, the tail end of the pressure boosting pipeline is communicated with the high-temperature condensing device, the head end of the pressure reducing pipeline is communicated with the high-temperature condensing device, the tail end of the pressure reducing pipeline is communicated with the condensing and evaporating device to form a circulation loop, and the output heat pump circulation unit is used for driving the first working medium to run in the circulation loop, absorbing medium-temperature heat energy in the condensing and evaporating device and emitting high-temperature heat energy outwards in the high-temperature condensing device; a gas separation device, which is disposed on the depressurization pipeline and between the first expansion device and the second expansion device, is communicated with the depressurization pipeline, and the first working medium is used for sequentially flowing through the first expansion device, the gas separation device and the second expansion device;
the gas separation device is configured to discharge a gas in the circulation loop of the output heat pump cycle unit;
the first working medium flows in the circulation loop, and the first working medium is used for flowing through the compression device, the high-temperature condensation device, the first expansion device, the gas separation device, the second expansion device and the condensation evaporation device from the head end of the boosting pipeline in sequence and finally returning to the head end of the boosting pipeline.
Further, the gas separation device comprises a gas separator and an exhaust pipe, wherein a gas outlet end of the gas separator is communicated with a head end of the exhaust pipe, and a tail end of the exhaust pipe is used for being communicated with the external environment; the gas separation device also comprises an access pipeline and an output pipeline, wherein the working medium inlet end of the gas separator is communicated with the tail end of the access pipeline, and the head end of the access pipeline is communicated with the outlet end of the first expansion device; the working medium outlet end of the gas separator is communicated with the head end of the receiving pipeline, and the tail end of the receiving pipeline is communicated with the inlet end of the second expansion device; the exhaust pipe is provided with a check valve near the end of the exhaust pipe, the check valve is communicated with the exhaust pipe, and the check valve is used for preventing gas in the external environment from entering the gas separator.
Optionally, a heat-releasing heat exchanger is disposed on a pressure-reducing pipeline between an outlet end of the first expansion device and an inlet end of the working medium of the gas separation device, a heat-absorbing heat exchanger is disposed on a pressure-reducing pipeline between an outlet end of the second expansion device and an inlet end of the condensing and evaporating device, the pressure-reducing pipeline is used for communicating the heat-releasing heat exchanger and the heat-absorbing heat exchanger, the heat-releasing heat exchanger and the heat-absorbing heat exchanger are used for forming a heat regenerator, and the heat-absorbing heat exchanger is used for absorbing heat energy in the heat-releasing heat exchanger.
Optionally, the inlet line and the outlet line are both hoses, and the inlet line and the outlet line are used for adjusting the gas separator to a preset height to control the gas pressure in the gas separator.
Optionally, the gas separation device further comprises a pressure regulating device, the head end of the access pipeline is communicated with the outlet end of the pressure regulating device, and the inlet end of the pressure regulating device is communicated with the outlet end of the first expansion device.
Optionally, the high-temperature heat pump cycle system further includes an input heat pump cycle unit, and the input heat pump cycle unit and the output heat pump cycle unit are configured to form a cascade heat pump cycle system; the input heat pump circulating unit comprises a second working medium which circulates in the input heat pump circulating unit and is used for heating low-temperature heat energy to medium-temperature heat energy in a high-temperature heat pump circulating system; the input heat pump circulating unit is used for providing medium-temperature heat energy for the first working medium in the condensing and evaporating device through the second working medium by means of the cascade heat pump circulating system.
Optionally, a gas monitoring device is disposed on the gas separator, and the gas monitoring device is configured to monitor a volume of gas in the gas separator.
Optionally, a pressure measuring device is disposed at a leading end of the exhaust pipe, and the pressure measuring device is used for measuring the air pressure in the gas separator.
Optionally, a vacuum pump is disposed at a terminal of the exhaust pipe, an inlet end of the vacuum pump is communicated with the terminal of the exhaust pipe, an outlet end of the vacuum pump is communicated with an external environment, and the vacuum pump is used for pumping out the gas in the gas separator.
Optionally, the exhaust pipe is further provided with a first stop valve, the first stop valve is provided on the exhaust pipe, the first stop valve is communicated with the exhaust pipe, and the first stop valve is used for controlling the flow between the gas in the gas separator and the external environment.
The beneficial effects of the invention include:
the invention discloses a high-temperature heat pump circulating system, which comprises: an output heat pump cycle unit and a gas separation device; the output heat pump circulating unit comprises a boosting pipeline, a pressure reducing pipeline, a first compression device, a first expansion device, a second expansion device, a first working medium, a condensation evaporation device and a high-temperature condensation device; the first working medium circulates in the output heat pump circulation unit, the first compression device is arranged on the boosting pipeline, the first expansion device and the second expansion device are arranged on the depressurization pipeline, the high-temperature condensation device is arranged between the tail end of the boosting pipeline and the head end of the depressurization pipeline, and the condensation evaporation device is arranged between the tail end of the depressurization pipeline and the head end of the boosting pipeline; the first compression device is communicated with the pressure increasing pipeline, and the first expansion device and the second expansion device are communicated with the pressure reducing pipeline. The pressure boosting pipeline head end is communicated with the condensation evaporation device, the pressure boosting pipeline tail end is communicated with the high-temperature condensation device, the pressure reducing pipeline head end is communicated with the high-temperature condensation device, the pressure reducing pipeline tail end is communicated with the condensation evaporation device to form a circulation loop, the first working medium flows in the circulation loop, and the first working medium is used for sequentially flowing through the compression device from the head end of the pressure boosting pipeline, the high-temperature condensation device, the first expansion device, the gas separation device, the second expansion device and the condensation evaporation device to return to the head end of the pressure boosting pipeline. The output heat pump circulating unit is used for driving the first working medium to run in the circulating loop, absorbing medium-temperature heat energy in the condensing and evaporating device and outputting high-temperature heat energy to the outside in the high-temperature condensing device.
The gas separation device is arranged on the depressurization pipeline and between the first expansion device and the second expansion device, the gas separation device is communicated with the depressurization pipeline, and the first working medium is used for sequentially flowing through the first expansion device, the gas separation device and the second expansion device. The gas separation device is used for discharging gas in the circulation loop of the output heat pump circulation unit.
Set up gas separation device on the step-down pipeline, and set up between first expansion device and second expansion device, be convenient for to the gas pressure regulation in the gas separation device, adjust the gas pressure in the gas separation device to the state that is a little higher than external environment atmospheric pressure, gas separation device can be under the gas pressure a little higher than external environment atmospheric pressure, air among the discharge circulation loop, and then be favorable to the gaseous steady high efficiency discharge external environment in the circulation loop, ensure the steady high-efficient operation of high temperature heat pump circulation system. The gas separation device can stably and efficiently discharge the air entering the negative pressure pipeline to the external environment, so that the invention can stably and efficiently output high-temperature heat energy compared with the prior art.
The high-temperature heat pump circulating system also comprises an input heat pump circulating unit, the input heat pump circulating unit and the output heat pump circulating unit are used for forming a cascade heat pump circulating system, the input heat pump circulating unit comprises a second working medium, the second working medium circulates in the input heat pump circulating unit, the input heat pump circulating unit is used for heating low-temperature heat energy to medium-temperature heat energy in the high-temperature heat pump circulating system, and the input heat pump circulating unit is used for providing the medium-temperature heat energy for a first working medium in the condensing and evaporating device through the second working medium by means of the cascade heat pump circulating system; it is easy to understand that the output heat pump cycle unit heats the first working medium which is input into the heat pump cycle unit after being heated again, and heat energy with higher temperature is formed to be output to the outside. The specific mode is that the first working medium absorbs heat energy from the second working medium input into the heat pump circulation unit at the position of the condensing and evaporating device of the output heat pump circulation unit by means of the cascade heat pump circulation system, and then the output heat pump circulation unit further heats the first working medium, so that the output heat pump circulation unit can continuously output heat energy with higher temperature at the position of the high-temperature condensing device.
Drawings
In order to more clearly illustrate the objects, solutions and advantages of the present invention, reference will now be made briefly to the accompanying drawings, which are to be used in the present invention, and it is to be understood that the following drawings illustrate only some embodiments of the invention and are therefore not to be considered limiting of its scope, and that other related drawings may be derived therefrom by those skilled in the art without the exercise of inventive faculty.
Fig. 1 is a schematic view of a high temperature heat pump cycle system provided in an embodiment of the present invention.
Icon: 1000-high temperature heat pump cycle system; 100-input heat pump cycle unit; 200-output heat pump cycle unit; 210-a booster circuit; 220-a depressurization line; 230-high temperature condensing unit; 240-a condensation evaporation device; 300-a gas separation unit; 310-a gas separator; 320-an exhaust pipe; 330-access pipe; 340-connecting out pipeline; 350-a pressure regulating device; 360-pressure measuring device; 370-a check valve; 380-first stop valve; 390-vacuum pump; 31-a liquid supplementing pipe; 32-a second stop valve; 400-a first compression device; 600-a first expansion device; 700-a second expansion device; a-a first working medium; b-a second working medium; 800-a heat regenerative device; 810-heat absorption heat exchanger; 820-heat rejection heat exchanger; 900-gas monitoring means; 30-a flash tank; 20-water pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to 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, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The heat pump is used for transferring heat energy to a high-temperature position from a low-temperature position after the heat energy is heated, and the low-temperature heat energy is output to the outside after being circularly heated by the heat pump. In the prior art, the heat output temperature of the heat pump is not high, and the use effect is not ideal. The high temperature heat pump cycle system provided in the embodiments of the present invention can solve this problem.
Example 1:
an embodiment of the present invention is described in detail below with reference to fig. 1, which provides a high temperature heat pump cycle 1000.
The high-temperature heat pump cycle 1000 includes an output heat pump cycle unit 200 and a gas separation device 300.
The output heat pump cycle unit 200 includes a pressure increasing pipeline 210, a pressure decreasing pipeline 220, a first compression device 400, a first expansion device 600, a second expansion device 700, a first working medium a, a condensing and evaporating device 240, and a high temperature condensing device 230. In this embodiment, the first working medium a circulates in the output heat pump cycle unit 200, the first compression device 400 is a multi-stage series centrifugal compressor set, the first expansion device 600 and the second expansion device 700 are both expansion valves, the first working medium a is soft water, the condensing and evaporating device 240 is an evaporating heat exchanger, and the high-temperature condensing device 230 is a condensing heat exchanger.
The first compression device 400 is disposed on the pressure-increasing pipeline 210, the first expansion device 600 and the second expansion device 700 are disposed on the pressure-decreasing pipeline 220, the high-temperature condensing device 230 is disposed between the tail end of the pressure-increasing pipeline 210 and the head end of the pressure-decreasing pipeline 220, and the condensing and evaporating device 240 is disposed between the tail end of the pressure-decreasing pipeline 220 and the head end of the pressure-increasing pipeline 210. Specifically, the tail end of the pressure increasing pipeline 210 is an end close to the high temperature condensing device 230, the head end of the pressure decreasing pipeline 220 is an end close to the high temperature condensing device 230, the tail end of the pressure decreasing pipeline 220 is an end close to the condensing and evaporating device 240, and the head end of the pressure increasing pipeline 210 is an end close to the condensing and evaporating device 240.
It will be appreciated that a first working fluid a flows in the circulation loop and is used to flow from the head end of the boost conduit 210 through the first compression device 400, the high temperature condensing device 230, the first expansion device 600, the gas separation device 300, the second expansion device 700 and the condensing and evaporating device 240 in sequence back to the head end of the boost conduit 210. Specifically, the head end of the pressure increasing pipeline 210 is communicated with the condensing and evaporating device 240, the tail end of the pressure increasing pipeline 210 is communicated with the high temperature condensing device 230, the head end of the pressure decreasing pipeline 220 is communicated with the high temperature condensing device 230, the tail end of the pressure decreasing pipeline 220 is communicated with the condensing and evaporating device 240 to form a circulation loop, and the output heat pump circulation unit 200 is used for driving the first working medium a to operate in the circulation loop, absorbing medium temperature heat energy in the condensing and evaporating device 240, and outputting high temperature heat energy to the outside in the high temperature condensing device 230.
In the present embodiment, the middle temperature thermal energy may be thermal energy of less than 100 degrees celsius. It can be understood that, because the first working medium a is required to be lower than 100 ℃ at the condensation and evaporation device 240 to absorb heat energy, and the first working medium a is soft water, and the soft water has a saturation pressure lower than atmospheric pressure within the saturation temperature range, the condensation and evaporation device 240 is required to operate under negative pressure, so that the air in the external environment can easily enter the circulation loop of the output heat pump circulation unit 200, thereby greatly affecting the stable operation of the output heat pump circulation unit 200, and being not beneficial to the high-temperature condensation device 230 to efficiently and stably output high-temperature heat energy outwards.
The first compression device 400 is communicated with the pressure-increasing pipeline 210, the first expansion device 600 and the second expansion device 700 are communicated with the pressure-decreasing pipeline 220, the gas separation device 300 is arranged on the pressure-decreasing pipeline 220 and arranged between the first expansion device 600 and the second expansion device 700, further, the gas separation device 300 is communicated with the pressure-decreasing pipeline 220, and the first working medium a is used for sequentially flowing through the first expansion device 600, the gas separation device 300 and the second expansion device 700.
Since the first working medium a is soft water, in this embodiment, when the output heat pump cycle unit 200 operates, the high temperature condensing unit 230 can output high temperature heat energy higher than 100 degrees celsius. The pressure of the first working medium a at the high-temperature condensing device 230 is higher than an atmospheric pressure, the pressure of the first working medium a at the condensing and evaporating device 240 is lower than an atmospheric pressure, the first expansion device 600 and the second expansion device 700 are decompression devices, the gas separating device 300 is arranged on the decompression pipeline 220 and is arranged between the first expansion device 600 and the second expansion device 700, the decompression amplitude of the first expansion device 600 and the second expansion device 700 is reasonably set, the pressure ratio of the first working medium a in the gas separating device 300 between the first expansion device 600 and the second expansion device 700 is slightly higher than the atmospheric pressure of the external environment, and the gas in the circulation loop can be smoothly discharged through the gas separating device 300. Since the gas separation device 300 can discharge the air in the circulation loop at a gas pressure slightly higher than the external ambient pressure, the operation of the output heat pump cycle unit 200 is more stable, and the output of high-temperature heat energy is also more stable.
In the present embodiment, the gas separation device 300 is used to discharge the gas in the circulation loop of the output heat pump cycle unit 200.
Example 2:
based on the above embodiments, referring to fig. 1, another embodiment of the present invention is that the gas separation device 300 includes a gas separator 310 and an exhaust pipe 320, specifically, the gas separator 310 is a steam-water separator, a gas outlet end of the gas separator 310 is connected to a head end of the exhaust pipe 320, and a tail end of the exhaust pipe 320 is used for being connected to the external environment. The gas separating device 300 further comprises an inlet pipe 330 and an outlet pipe 340, wherein the working medium inlet end of the gas separator 310 is communicated with the tail end of the inlet pipe 330, the head end of the inlet pipe 330 is communicated with the outlet end of the first expansion device 600, the working medium outlet end of the gas separator 310 is communicated with the head end of the outlet pipe 340, and the tail end of the outlet pipe 340 is communicated with the inlet end of the second expansion device 700.
The exhaust pipe 320 is provided with a check valve 370 near the end of the exhaust pipe 320, the check valve 370 is connected to the exhaust pipe 320, and the check valve 370 is used for preventing the gas in the external environment from entering the gas separator 310.
Example 3:
based on the above embodiments, referring to fig. 1, in another embodiment of the present invention, a heat-releasing heat exchanger 820 is disposed on the pressure-reducing pipeline 220 between the outlet end of the first expansion device 600 and the working medium inlet end of the gas separator 310, a heat-absorbing heat exchanger 810 is disposed on the pressure-reducing pipeline 220 between the outlet end of the second expansion device 700 and the inlet end of the condensing and evaporating device 240, the pressure-reducing pipeline 220 is used to communicate the heat-releasing heat exchanger 820 and the heat-absorbing heat exchanger 810, the heat-releasing heat exchanger 820 and the heat-absorbing heat exchanger 810 are used to form the heat regenerator 800, and the heat-absorbing heat exchanger 810 is used to absorb heat energy in the heat-releasing heat exchanger 820. The heat energy in the relatively high-temperature heat releasing heat exchanger 820 is absorbed by the relatively low-temperature heat absorbing heat exchanger 810, so that the temperature of the first working medium a flowing through the heat releasing heat exchanger 820 is reduced, and the first working medium a entering the gas separator 310 is ensured to be in a liquid state.
Example 4:
based on the above embodiment, referring to fig. 1, another embodiment of the present invention is that the inlet pipe 330 and the outlet pipe 340 are both flexible pipes, and in this case, the gas separator 310 can be adjusted to a preset height through the inlet pipe 330 and the outlet pipe 340 to control the gas pressure in the gas separator 310, i.e. the gas pressure in the gas separator 310 is controlled by the liquid column gravity pressure difference. While the gas pressure in the gas separator 310 is roughly adjusted by the first expansion device 600 and the second expansion device 700, the height of the gas separator 310 with respect to the first expansion device 600 is changed by using the characteristic that the inlet pipe 330 and the outlet pipe 340 are flexible pipes, thereby achieving fine adjustment of the gas pressure in the gas separator 310. When the air pressure in the gas separator 310 is adjusted to be slightly higher than the air pressure in the external environment, the air entering the circulation loop due to the negative pressure of the condensing and evaporating device 240 is easily and stably and efficiently discharged to the external environment, so that the stable and efficient operation of the high-temperature heat pump circulation system 1000 is ensured.
Example 5:
based on the above embodiments, referring to fig. 1, another embodiment of the present invention is that the gas separation device 300 further includes a pressure regulating device 350, specifically, the pressure regulating device 350 is a pressure regulating valve, the head end of the access pipeline 330 is connected to the outlet end of the pressure regulating device 350, and the inlet end of the pressure regulating device 350 is connected to the outlet end of the first expansion device 600, it can be understood that the pressure regulating device 350 can control the pressure in the access pipeline 330 to further regulate the gas pressure in the gas separator 310, and the first expansion device 600 and the second expansion device 700 are used to roughly regulate the gas pressure in the gas separator 310, and at the same time, the pressure regulating device 350 is used to achieve fine regulation of the gas pressure in the gas separator 310. When the air pressure in the gas separator 310 is adjusted to be slightly higher than the air pressure in the external environment, the air entering the circulation loop due to the negative pressure of the condensing and evaporating device 240 is easily and stably and efficiently discharged to the external environment, so that the stable and efficient operation of the high-temperature heat pump circulation system 1000 is ensured.
Example 6:
based on the above embodiments, referring to fig. 1, another embodiment of the present invention is that the high temperature heat pump cycle system 1000 further includes an input heat pump cycle unit 100. The input heat pump cycle unit 100 includes a second working medium B, and the second working medium B circulates in the input heat pump cycle unit 100; the input heat pump cycle unit 100 and the output heat pump cycle unit 200 are used to form a cascade heat pump cycle system.
The input heat pump cycle unit 100 is used for providing medium-temperature heat energy to the first working medium a in the condensing and evaporating device 240 through the second working medium B by means of the cascade heat pump cycle system, and it can be understood that the output heat pump cycle unit 200 and the input heat pump cycle unit 100 complete heat exchange through the condensing and evaporating device 240. The input heat pump cycle unit 100 is used for heating low-temperature heat energy to medium-temperature heat energy in the high-temperature heat pump cycle system 1000, and the output heat pump cycle unit 200 heats the first working medium a through the condensing and evaporating device 240 to the input heat pump cycle unit 100, and then heats the first working medium a again to form higher-temperature heat energy which is output through the high-temperature condensing device 230.
Specifically, in the present embodiment, the input heat pump cycle unit 100 is formed by a general heat pump cycle device, the second working medium B may be a freon refrigerant, and the input heat pump cycle unit 100 is implemented by a conventional heat pump cycle technology, which will not be described in detail herein.
Example 7:
based on the above embodiment, referring to fig. 1, another embodiment of the present invention is that a gas monitoring device 900 is disposed on the gas separator 310, and the gas monitoring device 900 is used for monitoring the gas volume in the gas separator 310, specifically, a gas detection device is mounted on the gas separator 310 and is used for monitoring the gas volume in the gas separator 310, and in this embodiment, the gas detection device may be a liquid sight glass.
Example 8:
based on the above embodiment, referring to fig. 1, another embodiment of the present invention is that a pressure measuring device 360 is disposed at the head end of the exhaust pipe 320, and the pressure measuring device 360 is used for measuring the air pressure in the gas separator 310, and specifically, the pressure measuring device 360 may be a pressure measuring instrument.
Example 9:
based on the above embodiments, referring to fig. 1, in another embodiment of the present invention, a vacuum pump 390 is disposed at the end of the exhaust pipe 320, an inlet end of the vacuum pump 390 is connected to the end of the exhaust pipe 320, an outlet end of the vacuum pump 390 is connected to the external environment, and the vacuum pump 390 is used for pumping out the gas in the gas separator 310.
Example 10:
based on the above embodiments, referring to fig. 1, in another embodiment of the present invention, the exhaust pipe 320 is further provided with a first stop valve 380, the first stop valve 380 is connected to the exhaust pipe 320, and the first stop valve 380 is used for controlling the flow between the gas in the gas separator 310 and the external environment.
It should be noted that, during the normal operation of the whole high temperature heat pump cycle system 1000, the first stop valve 380 is in a closed state, at this time, the gas in the gas separator 310 is not discharged to the external environment through the exhaust pipe 320, when too much gas in the cycle loop affects the normal operation of the output heat pump cycle unit 200 or when the volume of the gas in the gas separator 310 reaches a preset value, for example, when the volume of the gas in the gas separator 310 exceeds a preset gas volume value, the first stop valve 380 is opened, at this time, the gas in the gas separator 310 is discharged to the external environment, when the volume of the gas in the gas separator 310 is reduced to another preset volume value which does not affect the normal operation of the output heat pump cycle unit 200 or is below the preset gas volume value, the first stop valve 380 is closed, so that the cycle operation of the first working medium a in the cycle loop of the output heat pump cycle unit 200 can be better ensured, thereby outputting high-temperature heat energy to the outside efficiently.
Example 11:
based on the above-mentioned embodiment, referring to fig. 1, another embodiment of the present invention is that the gas separator 310 is provided with a liquid supplementing pipe 31, the liquid supplementing pipe 31 connects the liquid supplementing inlet end of the gas separator 310 with the outside, the liquid supplementing pipe 31 is provided with a second stop valve 32, the second stop valve 32 is used for controlling the connection or disconnection between the liquid supplementing inlet end of the gas separator 310 and the outside, the liquid supplementing pipe 31 can supplement the first working medium a from the outside into the gas separator 310 and further into the circulation loop of the output heat pump circulation unit 200, it can be understood that during the normal operation of the high temperature heat pump circulation system 1000, the second stop valve 32 is normally in a closed state, when the first working medium a in the circulation loop of the output heat pump circulation unit 200 is too low to affect the normal operation of the output heat pump circulation unit 200 or is lower than a preset value, for example, part of the gaseous first working medium a is discharged to the outside environment through the exhaust pipe 320, the first working medium a in the circulation loop is reduced, and when the first working medium a in the circulation loop is too low to affect the normal operation of the output heat pump circulation unit 200 or is lower than a preset value, at this time, the second stop valve 32 needs to be opened to supplement the first working medium a to the gas separator 310, so that the first working medium a can enter the circulation loop.
Example 12:
based on the above embodiment, referring to fig. 1, another embodiment of the present invention is that the output heat pump cycle unit 200 further includes a water pump 20 and a flash tank 30, the flash tank 30 is simultaneously communicated with the pressure increasing line 210 and the pressure decreasing line 220, wherein, on the pressure increasing line 210, the output end of the condensing and evaporating device 240 is communicated with the flash tank 30, the input end of the first compression device 400 is communicated with the flash tank 30, on the pressure decreasing line 220, the input end of the condensing and evaporating device 240 is communicated with the flash tank 30, and the output end of the heat absorption heat exchanger 810 is communicated with the flash tank 30, wherein, the water pump 20 is communicated with the pressure decreasing line 220 between the flash tank 30 and the input end of the condensing and evaporating device 240. The flash tank 30 can collect the first working medium a from the output end of the heat absorption heat exchanger 810, the gaseous first working medium a enters the pressure increasing pipeline 210 and further enters the input end of the first compression device 400, the liquid first working medium a enters the pressure decreasing pipeline 220 and flows through the water pump 20, and then enters the condensation evaporation device 240 to absorb heat, specifically, the water pump 20 is a circulating water pump.
It can be understood that, in this embodiment, the input heat pump cycle unit 100 absorbs heat at the condensing and evaporating device 240 to raise the temperature of the first working medium a circulating in the output heat pump cycle unit 200, and converts the first working medium a into a gaseous first working medium a, the first working medium a is boosted and raised in temperature through the first compression device 400 on the boost pipeline 210, so that the temperature of the first working medium a reaching the high temperature condensing device 230 reaches above 100 degrees celsius, at this time, the high temperature condensing device 230 outputs high temperature heat energy to the outside, then, the first working medium a enters the pressure reduction pipeline 220, and the first working medium a completes pressure reduction and temperature reduction through the first expansion device 600 and the second expansion device 700. Specifically, the first working medium a sequentially passes through the first expansion device 600, the heat-releasing heat exchanger 820 and the access pipeline 330, and then enters the gas separator 310, where it should be noted that the first working medium a flowing into the gas separator 310 is in a liquid state, and then the first working medium a flows through the second expansion device 700, the heat-absorbing heat exchanger 810, the flash tank 30 and the water pump 20 from the access pipeline 340 and flows back to the condensing and evaporating device 240. Since the first working medium a absorbs heat energy at a temperature lower than 100 ℃ at the position of the condensing and evaporating device 240, the condensing and evaporating device 240 operates under negative pressure, the negative pressure pipeline is difficult to avoid entering air, when too much gas in the circulation loop affects the normal operation of the output heat pump circulation unit 200 or when the volume of the gas in the gas separator 310 reaches a preset value, for example, when the volume of the gas in the gas separator 310 exceeds a preset gas volume value, the first stop valve 380 is opened, and at this time, the gas in the gas separator 310 is discharged to the external environment; when the volume of the gas in the gas separator 310 is reduced to another preset gas volume value below the preset gas volume value or the normal operation of the output heat pump cycle unit 200 is not affected, the first stop valve 380 is closed, so that the cycle operation of the first working medium a in the internal cycle loop of the output heat pump cycle unit 200 can be better ensured, and the stable and efficient output of high-temperature heat energy to the outside of the output heat pump cycle unit 200 is ensured.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the above claims.
Claims (10)
1. A high temperature heat pump cycle system (1000), comprising:
an output heat pump cycle unit (200); the output heat pump circulating unit (200) comprises a boosting pipeline (210), a pressure reducing pipeline (220), a first compression device (400), a first expansion device (600), a second expansion device (700), a first working medium (A), a condensing and evaporating device (240) and a high-temperature condensing device (230); the first working medium (A) circulates in the output heat pump circulating unit (200); the first compression device (400) is arranged on the pressure increasing pipeline (210), the first expansion device (600) and the second expansion device (700) are arranged on the pressure reducing pipeline (220), the high-temperature condensation device (230) is arranged between the tail end of the pressure increasing pipeline (210) and the head end of the pressure reducing pipeline (220), and the condensation and evaporation device (240) is arranged between the tail end of the pressure reducing pipeline (220) and the head end of the pressure increasing pipeline (210); said first compression device (400) being in communication with said boost conduit (210), said first expansion device (600) and second expansion device (700) being in communication with said buck conduit (220); the head end of the pressure boosting pipeline (210) is communicated with the condensing and evaporating device (240), the tail end of the pressure boosting pipeline (210) is communicated with the high-temperature condensing device (230), the head end of the pressure reducing pipeline (220) is communicated with the high-temperature condensing device (230), the tail end of the pressure reducing pipeline (220) is communicated with the condensing and evaporating device (240) to form a circulation loop, and the first working medium (A) flows in the circulation loop;
the gas separation device (300) is arranged on the depressurization pipeline (220) and between the first expansion device (600) and the second expansion device (700), the gas separation device (300) is communicated with the depressurization pipeline (220), and the first working medium (A) is used for sequentially flowing through the first expansion device (600), the gas separation device (300) and the second expansion device (700); the gas separation device (300) is used for discharging gas in the circulation loop of the output heat pump circulation unit (200);
the first working medium (A) is used for flowing from the head end of the pressure boosting pipeline (210) to the head end of the pressure boosting pipeline (210) through the first compression device (400), the high-temperature condensation device (230), the first expansion device (600), the gas separation device (300), the second expansion device (700) and the condensation evaporation device (240) in sequence.
2. The high temperature heat pump cycle system (1000) of claim 1, wherein the gas separation device (300) comprises a gas separator (310) and an exhaust pipe (320), a gas outlet end of the gas separator (310) is communicated with a head end of the exhaust pipe (320), and a tail end of the exhaust pipe (320) is communicated with the external environment; the gas separation device (300) further comprises an access pipeline (330) and an outlet pipeline (340), the working medium inlet end of the gas separator (310) is communicated with the tail end of the access pipeline (330), and the head end of the access pipeline (330) is communicated with the outlet end of the first expansion device (600); the working medium outlet end of the gas separator (310) is communicated with the head end of the outlet pipeline (340), and the tail end of the outlet pipeline (340) is communicated with the inlet end of the second expansion device (700); a check valve (370) is arranged on the exhaust pipe (320) near the tail end of the exhaust pipe (320), the check valve (370) is communicated with the exhaust pipe (320), and the check valve (370) is used for preventing gas in the external environment from entering the gas separator (310).
3. The high-temperature heat pump cycle system (1000) according to claim 1, wherein a heat-releasing heat exchanger (820) is disposed on the depressurization line (220) between the outlet end of the first expansion device (600) and the working medium inlet end of the gas separation device (300), a heat-absorbing heat exchanger (810) is disposed on the depressurization line (220) between the outlet end of the second expansion device (700) and the inlet end of the condensation evaporation device (240), the depressurization line (220) is used for communicating the heat-releasing heat exchanger (820) and the heat-absorbing heat exchanger (810), the heat-releasing heat exchanger (820) and the heat-absorbing heat exchanger (810) are used for forming a heat regenerator (800), and the heat-absorbing heat exchanger (810) is used for absorbing heat energy in the heat-releasing heat exchanger (820).
4. The high temperature heat pump cycle system (1000) of claim 2, wherein the inlet line (330) and the outlet line (340) are both hoses, the inlet line (330) and the outlet line (340) being configured to adjust the gas separator (310) to a predetermined height to control a gas pressure within the gas separator (310).
5. The high temperature heat pump cycle system (1000) of claim 2, wherein the gas separation device (300) further comprises a pressure regulating device (350), the head end of the access pipe (330) is connected to the outlet end of the pressure regulating device (350), and the inlet end of the pressure regulating device (350) is connected to the outlet end of the first expansion device (600).
6. The high temperature heat pump cycle (1000) of claim 1, wherein the high temperature heat pump cycle (1000) further comprises an input heat pump cycle unit (100), the input heat pump cycle unit (100) and the output heat pump cycle unit (200) being configured to form a cascade heat pump cycle; the input heat pump circulating unit (100) comprises a second working medium (B), the second working medium (B) circulates in the input heat pump circulating unit (100), and the input heat pump circulating unit (100) is used for heating low-temperature heat energy to medium-temperature heat energy in a high-temperature heat pump circulating system (1000); the input heat pump circulating unit (100) is used for providing medium-temperature heat energy for the first working medium (A) in the condensing and evaporating device (240) through the second working medium (B) by means of the cascade heat pump circulating system.
7. A high temperature heat pump cycle system (1000) according to claim 2, wherein a gas monitoring device (900) is provided on the gas separator (310), the gas monitoring device (900) being configured to monitor a volume of gas in the gas separator (310).
8. The high temperature heat pump cycle system (1000) of claim 2, wherein a pressure measuring device (360) is disposed at a head end of the exhaust pipe (320), and the pressure measuring device (360) is used for measuring the gas pressure in the gas separator (310).
9. The high temperature heat pump cycle system (1000) according to claim 2, wherein a vacuum pump (390) is disposed at an end of the exhaust pipe (320), an inlet end of the vacuum pump (390) is connected to the end of the exhaust pipe (320), an outlet end of the vacuum pump (390) is connected to the external environment, and the vacuum pump (390) is used for pumping out the gas in the gas separator (310).
10. The high temperature heat pump cycle system (1000) of claim 2, wherein the exhaust pipe (320) further comprises a first stop valve (380), the first stop valve (380) is connected to the exhaust pipe (320), and the first stop valve (380) is used for controlling the flow between the gas in the gas separator (310) and the external environment.
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