CN210663455U - Water source heat pump with multi-stage heat exchange - Google Patents
Water source heat pump with multi-stage heat exchange Download PDFInfo
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- CN210663455U CN210663455U CN201920921430.5U CN201920921430U CN210663455U CN 210663455 U CN210663455 U CN 210663455U CN 201920921430 U CN201920921430 U CN 201920921430U CN 210663455 U CN210663455 U CN 210663455U
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Abstract
A multi-stage heat exchange water source heat pump belongs to the technical field of heat pumps; the water source heat pump provided by the patent comprises a front heat exchanger module and a multi-stage heat pump heating module, wherein each stage of heat pump unit comprises a compressor, a condenser, an expansion valve and an evaporator which are formed by connecting refrigerant pipelines in series. Use the utility model discloses the water source heat pump of technology development mainly is applied to the heat transfer place that has more waste water source, reduces to suitable temperature after the multistage heat transfer from higher temperature through one set of equipment once only with waste water source and discharges, and heat absorption liquid absorbs heat behind preceding heat exchanger and the multistage condenser and heaies up gradually simultaneously, once only reaches target temperature. The application of the method effectively reduces the initial investment and the operating cost of the equipment and improves the energy efficiency of the heating system.
Description
Technical Field
The patent relates to a water source heat pump, in particular to a water source heat pump with multistage heat exchange, and belongs to the technical field of heat pumps.
Background
The water source heat pump product can absorb heat energy in lower-temperature and lower-grade water to obtain high-temperature effective energy, and the obtained high-grade heat energy is usually far more than the input energy power, so that better economic value is generated.
For waste water sources with higher temperature, such as bathroom sewage, heat dissipation condensate water and the like, if a water source heat pump is directly adopted, on one hand, the cost of a heat pump system is increased due to the fact that the temperature of an evaporator aimed at by the waste water source is too high; on the other hand, based on the inherent energy efficiency limitation of the heat pump system, the energy efficiency of the existing heat pump is difficult to be improved without limit by the water source with higher temperature.
Therefore, in order to further improve the energy efficiency of the waste water source heat pump heating system with higher temperature, heat exchange equipment is added outside the heat pump unit, low-temperature water needing to be heated is preliminarily preheated by the waste water source with higher initial temperature, about 40% of heat energy can be directly increased, the waste water source can enter the water source heat pump evaporator at a more proper temperature, the manufacturing cost of the water source heat pump is reduced, and the service life of the water source heat pump is prolonged.
Disclosure of Invention
To the demand that exists among the existing engineering, the water source heat pump of a multistage heat transfer that this patent provided through multistage heat transfer, has effectively improved water source heat pump's the efficiency of heating, also helps water source heat pump system steady operation.
The technical scheme of this patent is as follows:
a multi-stage heat exchange water source heat pump comprises a front heat exchanger module and a multi-stage heat pump heating module; the multistage heat pump heating module is provided with 2-6 stages of heat pump units, each stage of heat pump unit comprises an independent closed refrigerant pipeline system, respective compressors, condensers, expansion valves and evaporators are connected in series through refrigerant pipelines to form the heat pump unit, heat releasing working medium pipelines in evaporators of each stage of heat pump unit are connected in series, and heat absorbing working medium pipelines in condensers of each heat pump unit are also connected in series.
The front heat exchanger module is provided with two paths of heat exchange channels, namely a heat release channel and a heat absorption channel, wherein the heat release channel is communicated with a heat release working medium pipeline of an evaporator connected in series in the multistage heat pump heating module, and the heat absorption heat exchange channel is communicated with a heat absorption working medium pipeline of a condenser connected in series in the multistage heat pump heating module.
The operation control requirement of the water source heat pump with multi-stage heat exchange is as follows: the liquid entering the heat pump evaporator needs to be adjusted to a proper flow rate through a manual or program adjusting method so as to ensure that the temperature of the liquid discharged from the final outlet is close to a target value; likewise, the liquid entering the condenser of the heat pump needs to be adjusted to a proper flow rate by a manual or programmed adjustment method to ensure that the liquid exiting the final outlet is heated to a set temperature at one time.
The sequence of the heat absorption working medium flowing through the multistage heat pump condensers is just opposite to the sequence of the heat release working medium flowing through the multistage heat pump evaporators, namely, the heat pump corresponding to the heat pump condenser through which the heat absorption working medium flows first is just the heat pump corresponding to the heat pump evaporator through which the heat release working medium flows last, and similarly, the heat pump corresponding to the heat pump condenser through which the heat absorption working medium flows last is just the heat pump corresponding to the heat pump evaporator through which the heat release working medium flows first.
This patent compares with current water source heat pump and has following advantage:
the multistage heat exchange water source heat pump provided by the patent can fully absorb heat energy in water, effectively improves the overall energy efficiency of a heating system, and increases the economical efficiency of products.
Drawings
Fig. 1 of the accompanying drawings is a schematic structural principle diagram of the patent.
Wherein: 1-a pre-heat exchanger; 11-a condenser of a unit heat pump; 12-a compressor of a unit heat pump; 13-an evaporator of a unit heat pump; 14-expansion valve of a unit heat pump; 21-a condenser of a two-unit heat pump; 22-a compressor of a two-unit heat pump; 23-evaporator of the two-unit heat pump; 24-an expansion valve of a two-unit heat pump; 31-a condenser of a three unit heat pump; 32-a compressor of a three unit heat pump; 33-evaporator of a three unit heat pump; 34-expansion valve of three unit heat pump.
Detailed Description
The structure, principle and mode of operation of this patent are further explained with reference to the accompanying drawings as follows:
fig. 1 of the accompanying drawings is an embodiment of a multi-stage heat exchange water source heat pump disclosed in this patent, and the embodiment includes a front heat exchanger 1 and three-stage heat pump units, in which each heat pump unit of the three-stage heat pump units respectively connects a compressor, a condenser, an expansion valve, and an evaporator in series by refrigerant pipelines to form a closed loop.
The heat absorption loop of the front heat exchanger 1 is connected with the water pipeline of the condenser in the third-stage heat pump unit in series through a pipeline; meanwhile, the heat release loop of the front heat exchanger 1 is connected with the waste water pipeline of the evaporator in the three heat pump units in series through a pipeline, and in order to improve the heat exchange efficiency, the three unit waste water heat release loops are sequentially connected in series through the three unit heat pumps, the two unit heat pumps and the one unit heat pump.
In the operation process of the heat pump, the heat absorption working medium is tap water at 15 ℃, the heat release working medium is pretreated bath sewage at 35 ℃, after heat exchange is carried out in the front heat exchanger, the temperature of the tap water is increased to 28 ℃, the temperature of the bath sewage is reduced to 25 ℃, the tap water continuously absorbs heat energy emitted by the refrigerant through the first unit heat pump condenser 11, the second unit heat pump condenser 21 and the third unit heat pump condenser 31 in sequence, and the hot water at 52 ℃ enters the heat preservation water tank. The bath sewage from the front heat exchanger passes through the three-unit heat pump evaporator 33, the two-unit heat pump evaporator 23 and the one-unit heat pump evaporator 13 in sequence, further releases heat in the evaporators of the three heat pump units gradually, and then the temperature is reduced to 5 ℃ to leave the heat pump system.
In the control process, the water supply flow rate of the tap water needs to be adjusted, and the outlet water temperature of the tap water heated by the heat absorption loop is ensured to be about 52 ℃. And simultaneously controlling the water flow of the bath wastewater to ensure that the discharge temperature of the wastewater is between 5 and 10 ℃ so as to achieve better waste heat utilization effect.
The heat pumps of the three units are adopted for heat absorption and heat release, so that the temperature difference between the inlet and the outlet of the waste water source and the temperature difference between the inlet and the outlet of the tap water passing through each heat pump are within a reasonable range, and meanwhile, the evaporator and the condenser have reasonable pressure differences, which are beneficial to improving the energy efficiency of the water source heat pump system.
The above are only preferred embodiments of this patent and are not intended to limit the patent, which may be modified and varied by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present patent shall be included in the protection scope of the present patent.
Claims (4)
1. A multi-stage heat exchange water source heat pump comprises a front heat exchanger module and a multi-stage heat pump heating module; the method is characterized in that: the multistage heat pump heating module is provided with 2-6 stages of heat pump units, each stage of heat pump unit comprises an independent closed refrigerant pipeline system, respective compressors, condensers, expansion valves and evaporators are connected in series through refrigerant pipelines to form the heat pump unit, heat releasing working medium pipelines in evaporators of each stage of heat pump unit are connected in series, and heat absorbing working medium pipelines in condensers of each heat pump unit are also connected in series.
2. The multi-stage heat exchange water source heat pump according to claim 1, characterized in that: the front heat exchanger module is provided with two paths of heat exchange channels, namely a heat release channel and a heat absorption channel, wherein the heat release channel is communicated with a heat release working medium pipeline of an evaporator connected in series in the multistage heat pump heating module, and the heat absorption heat exchange channel is communicated with a heat absorption working medium pipeline of a condenser connected in series in the multistage heat pump heating module.
3. The multi-stage heat exchange water source heat pump according to claim 1, characterized in that: the operation control requirement of the water source heat pump with multi-stage heat exchange is as follows: the liquid entering the heat pump evaporator needs to be adjusted to a proper flow rate through a manual or program adjusting method so as to ensure that the temperature of the liquid discharged from the final outlet is close to a target value; likewise, the liquid entering the condenser of the heat pump needs to be adjusted to a proper flow rate by a manual or programmed adjustment method to ensure that the liquid exiting the final outlet is heated to a set temperature at one time.
4. The multi-stage heat exchange water source heat pump according to claim 1, characterized in that: the sequence of the heat absorption working medium flowing through the multistage heat pump condensers is just opposite to the sequence of the heat release working medium flowing through the multistage heat pump evaporators, namely, the heat pump corresponding to the heat pump condenser through which the heat absorption working medium flows first is just the heat pump corresponding to the heat pump evaporator through which the heat release working medium flows last, and similarly, the heat pump corresponding to the heat pump condenser through which the heat absorption working medium flows last is just the heat pump corresponding to the heat pump evaporator through which the heat release working medium flows first.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920921430.5U CN210663455U (en) | 2019-06-19 | 2019-06-19 | Water source heat pump with multi-stage heat exchange |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920921430.5U CN210663455U (en) | 2019-06-19 | 2019-06-19 | Water source heat pump with multi-stage heat exchange |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895605A (en) * | 2017-04-18 | 2017-06-27 | 深圳佩尔优科技有限公司 | Low Temperature Thermal waste water high-efficiency utilizes system and its control method |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895605A (en) * | 2017-04-18 | 2017-06-27 | 深圳佩尔优科技有限公司 | Low Temperature Thermal waste water high-efficiency utilizes system and its control method |
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