CN111425969B - Heat pump system and control method thereof - Google Patents
Heat pump system and control method thereof Download PDFInfo
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- CN111425969B CN111425969B CN202010183890.XA CN202010183890A CN111425969B CN 111425969 B CN111425969 B CN 111425969B CN 202010183890 A CN202010183890 A CN 202010183890A CN 111425969 B CN111425969 B CN 111425969B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
Abstract
The application provides a heat pump system and a control method thereof. The heat pump system comprises a compressor, an indoor heat exchanger, an intermediate heat exchanger, a first throttling device and an outdoor heat exchanger which are sequentially connected through a main pipeline, an enthalpy increasing pipeline is arranged between a pipeline between the indoor heat exchanger and the intermediate heat exchanger and a gas supplementing port of the compressor, the enthalpy increasing pipeline flows through the intermediate heat exchanger and exchanges heat with a refrigerant in the intermediate heat exchanger and the main pipeline, a second throttling device is arranged on the enthalpy increasing pipeline between the intermediate heat exchanger and the main pipeline, a liquid spraying pipeline is further connected to a pipeline between the indoor heat exchanger and the outdoor heat exchanger, the other end of the liquid spraying pipeline is connected to the compressor, and a liquid spraying valve is arranged on the liquid spraying pipeline. According to the heat pump system, the heating capacity and the heating performance of most low-temperature operation loads can be guaranteed, and the reliability of the ultralow-temperature operation loads can be guaranteed.
Description
Technical Field
The application relates to the technical field of air conditioning, in particular to a heat pump system and a control method thereof.
Background
With the continuous progress of the heat pump compressor enterprise technology, the air source heat pump has the capability of preparing high-temperature hot water below-25 ℃, and is widely applied to the northern market. Along with the reduction of the outdoor environment temperature, the compression ratio of the compressor is increased, the compressor is seriously deviated from the optimal design value, the isentropic coefficient is attenuated, the exhaust temperature of the compressor is rapidly increased, the allowable range is exceeded, and the power is rapidly increased; meanwhile, the mass flow is reduced, so that the heating capacity is seriously reduced, the energy-saving purpose cannot be achieved, and the comfort requirement of a user cannot be met.
The exhaust temperature of the compressor is controlled by adopting a refrigerant liquid spraying cooling technology, so that the running range under low environmental temperature can be expanded, but the exhaust temperature of the compressor can only be reduced, the reliability is increased, and the heating capacity and the energy efficiency cannot be improved; the refrigerant enhanced vapor injection technology can improve the heating capacity and the heating performance under the working condition of low environmental temperature, and improve the refrigerating performance of a part of load systems through the intermediate exhaust technology, but the operation reliability under the working condition of ultralow temperature is still insufficient.
Disclosure of Invention
Therefore, an object of the present invention is to provide a heat pump system and a control method thereof, which can ensure the heating capacity and the heating performance of most low-temperature operation loads, and can ensure the reliability of ultra-low-temperature operation loads.
In order to solve the problems, the application provides a heat pump system, which comprises a compressor, an indoor heat exchanger, an intermediate heat exchanger, a first throttling device and an outdoor heat exchanger, wherein the compressor is sequentially connected through a main pipeline, an enthalpy increasing pipeline is arranged between a pipeline between the indoor heat exchanger and the intermediate heat exchanger and an air supplementing port of the compressor, the enthalpy increasing pipeline flows through the intermediate heat exchanger and exchanges heat with a refrigerant in the main pipeline, a second throttling device is arranged on the enthalpy increasing pipeline between the intermediate heat exchanger and the main pipeline, a liquid spraying pipeline is further connected to the pipeline between the indoor heat exchanger and the outdoor heat exchanger, the other end of the liquid spraying pipeline is connected to the compressor, and a liquid spraying valve is arranged on the liquid spraying pipeline.
Preferably, an enthalpy increasing valve is further arranged on an enthalpy increasing pipeline between the second throttling device and the intermediate heat exchanger; and/or the refrigerant flowing direction of the enthalpy-increasing pipeline in the intermediate heat exchanger is opposite to the refrigerant flowing direction of the main pipeline in the intermediate heat exchanger.
According to another aspect of the present application, there is provided a control method of the heat pump system described above, including:
controlling the heat pump system to enter a heating mode;
acquiring the current outdoor environment temperature;
when the outdoor environment temperature Th is more than A, closing the enthalpy increasing valve and the liquid spraying valve;
and when the outdoor environment temperature B is less than or equal to Th and less than or equal to A, detecting the water temperature Tc and controlling the heat pump system according to the outlet water temperature Tc.
Preferably, the step of controlling the heat pump system according to the leaving water temperature Tc comprises:
when Tc is more than T1, the shutdown protection is started for the heat pump system.
Preferably, the step of controlling the heat pump system according to the leaving water temperature Tc further comprises:
and controlling the display to enter an alarm prompting state while starting the shutdown protection.
Preferably, the step of controlling the heat pump system according to the leaving water temperature Tc comprises:
and when the T2 is more than Tc and less than or equal to T1, controlling the heat pump system to continue to operate for heating, and opening the liquid spraying valve to spray liquid to the compressor.
Preferably, the step of controlling the heat pump system according to the leaving water temperature Tc comprises:
when T3 < Tc ≦ T2, the current discharge temperature Tp of the compressor is detected, and the heat pump system is controlled according to the discharge temperature Tp.
Preferably, the step of controlling the heat pump system in dependence of the exhaust gas temperature Tp comprises:
when Tp is more than Tp1, the heat pump system is started to stop for protection;
when Tp2 is more than Tp and less than or equal to Tp1, controlling the heat pump system to continue to operate for heating, and opening the liquid spraying valve to spray liquid to the compressor;
when Tp3 is more than Tp and less than or equal to Tp2, opening the enthalpy-increasing valve;
and when Tp is less than or equal to Tp3, closing the liquid spraying valve and the enthalpy increasing valve.
Preferably, the step of controlling the heat pump system according to the leaving water temperature Tc comprises:
when Tc < T3, the enthalpy-increasing valve and the liquid-spraying valve are closed.
Preferably, the step of controlling the heat pump system according to the leaving water temperature Tc further comprises:
and when T2 is less than Tc, controlling the heat pump system to give out a prompt of higher water temperature.
The application provides a heat pump system, include the compressor that connects gradually through the main line, indoor heat exchanger, middle heat exchanger, first throttling arrangement and outdoor heat exchanger, be provided with the enthalpy increasing pipeline between the pipeline between indoor heat exchanger and the middle heat exchanger and the tonifying qi mouth of compressor, the enthalpy increasing pipeline flows through middle heat exchanger, and the refrigerant heat transfer in middle heat exchanger and main line, be provided with second throttling arrangement on the enthalpy increasing pipeline between middle heat exchanger and main line, still be connected with the hydrojet pipeline on the pipeline between indoor heat exchanger and the outdoor heat exchanger, the other end of hydrojet pipeline is connected to the compressor, be provided with the hydrojet valve on the hydrojet pipeline. The heat pump system has the enthalpy increasing pipeline and the liquid spraying pipeline simultaneously, so that air supplying enthalpy increasing and liquid spraying cooling can be switched in a self-adaptive mode according to the running condition of the heat pump system, the heat pump system can be suitable for heating in a low-temperature environment, the heating capacity and the heating performance of most low-temperature running loads can be improved, and the reliability of ultralow-temperature running loads can be guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a heat pump system according to an embodiment of the present application;
fig. 2 is a control schematic diagram of a heat pump system according to an embodiment of the present application;
fig. 3 is a control flowchart of the heat pump system according to the embodiment of the present application.
The reference numerals are represented as:
1. a compressor; 2. an indoor heat exchanger; 3. an intermediate heat exchanger; 4. a first throttling device; 5. an outdoor heat exchanger; 6. an enthalpy increasing pipeline; 7. a second throttling device; 8. a liquid spray line; 9. a liquid spray valve; 10. an enthalpy increasing valve.
Detailed Description
Referring to fig. 1 to 3 in combination, according to an embodiment of the present application, a heat pump system includes a compressor 1, an indoor heat exchanger 2, an intermediate heat exchanger 3, a first throttling device 4, and an outdoor heat exchanger 5, which are sequentially connected through a main pipeline, an enthalpy increasing pipeline 6 is disposed between a pipeline between the indoor heat exchanger 2 and the intermediate heat exchanger 3 and a gas supplementing port of the compressor 1, the enthalpy increasing pipeline 6 flows through the intermediate heat exchanger 3, and exchanges heat with a refrigerant in the main pipeline at the intermediate heat exchanger 3, a second throttling device 7 is disposed on the enthalpy increasing pipeline 6 between the intermediate heat exchanger 3 and the main pipeline, a liquid spraying pipeline 8 is further connected to a pipeline between the indoor heat exchanger 2 and the outdoor heat exchanger 5, the other end of the liquid spraying pipeline 8 is connected to the compressor 1, and a liquid spraying valve 9 is disposed on the liquid spraying pipeline 8.
The heat pump system has the enthalpy increasing pipeline and the liquid spraying pipeline simultaneously, so that air supplying enthalpy increasing and liquid spraying cooling can be switched in a self-adaptive mode according to the running condition of the heat pump system, the heat pump system can be suitable for heating in a low-temperature environment, the heating capacity and the heating performance of most low-temperature running loads can be improved, and the reliability of ultralow-temperature running loads can be guaranteed.
An enthalpy increasing valve 10 is also arranged on the enthalpy increasing pipeline 6 between the second throttling device 7 and the intermediate heat exchanger 3.
The second throttling device 7 arranged on the enthalpy-increasing pipeline 6 can adjust the opening degree of the enthalpy-increasing pipeline 6, so that the enthalpy-increasing capacity is adjusted, the enthalpy-increasing capacity can be matched with the operation condition of the compressor 1, and the heat pump system can operate at better energy efficiency.
The enthalpy increasing valve 10 is used for controlling the opening and closing of the enthalpy increasing pipeline 6, so that the enthalpy increasing function of the enthalpy increasing pipeline 6 is started or the enthalpy increasing function of the enthalpy increasing pipeline 6 is stopped, and the operation requirement of the heat pump system is met.
Generally speaking, the second throttling device 7 can also function similarly to the enthalpy-increasing valve 10, but only by using the second throttling device 7, the closing effect of the enthalpy-increasing pipeline 6 is poor, so that the enthalpy-increasing valve 10 is additionally added, the opening and closing of the enthalpy-increasing function of the enthalpy-increasing pipeline 6 can be effectively ensured, and the reliability of enthalpy-increasing regulation of the heat pump system is improved.
The direction of refrigerant flow of the enthalpy-increasing line 6 in the intermediate heat exchanger 3 is opposite to the direction of refrigerant flow of the main line in the intermediate heat exchanger 3.
In the heating process of the heat pump system, the temperature of the refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger in the main pipeline is gradually reduced, so that the temperature of the refrigerant at the inlet of the intermediate heat exchanger 3 in the main pipeline is higher than that at the outlet, the refrigerant in the enthalpy increasing pipeline needs to absorb the heat of the refrigerant in the main pipeline, and when the flow directions of the refrigerant and the refrigerant in the enthalpy increasing pipeline are opposite in the heat exchange process, the heat exchange efficiency is maximized, so that the enthalpy increasing effect of the heat pump system can be improved.
Referring to fig. 2 and 3 in combination, according to an embodiment of the present application, the control method of the heat pump system includes: controlling the heat pump system to enter a heating mode; acquiring the current outdoor environment temperature; when the outdoor environment temperature Th is more than A, closing the enthalpy-increasing valve 10 and the liquid spraying valve 9; and when the outdoor environment temperature B is less than or equal to Th and less than or equal to A, detecting the water temperature Tc and controlling the heat pump system according to the outlet water temperature Tc.
When the ambient temperature Th is larger than A, the unit operates in a higher ambient range at the moment, and the unit is judged to be in non-low-temperature operation, so that enthalpy increasing or liquid spraying control required under the condition of low-temperature refrigeration does not need to operate, and an enthalpy spraying valve and a liquid spraying valve can be closed, so that the control difficulty is reduced, the control complexity is reduced, and the control efficiency is improved under the condition that the working performance of a heat pump system is not influenced.
When the outdoor environment temperature B is less than or equal to Th and less than or equal to A, the outdoor environment temperature is lower at the moment, and air supplement and enthalpy increase are needed under the low-temperature environment, so that the stable, reliable and high-energy-efficiency operation of the heat pump system are ensured, therefore, in the state, the heat pump system is in the suitable operation environment range, the enthalpy increase valve 10 and the liquid spraying valve 9 need to be controlled and adjusted according to the actual operation parameters of the heat pump system, and the reliability of the ultralow-temperature operation load is ensured while the heating capacity and the heating performance of most low-temperature operation loads are ensured.
The value of A is 0-30 ℃, preferably 15 ℃, the value of B is-30-10 ℃, preferably-20 ℃, and B is less than A.
The step of controlling the heat pump system according to the outlet water temperature Tc comprises the following steps: when Tc is more than T1, the shutdown protection is started for the heat pump system. When Tc is more than T1, the outlet water temperature is too high, the heat pump system judges that the unit is in an ultrahigh outlet water temperature protection state according to the water temperature, and therefore shutdown protection needs to be started, and damage caused by overhigh hot water temperature is avoided.
The step of controlling the heat pump system according to the outlet water temperature Tc further comprises: and controlling the display to enter an alarm prompting state while starting the shutdown protection. When the heat pump system starts the shutdown protection, a user may not know that the heat pump system needs to enter an alarm prompting state, and alarms in the modes of sound, light and the like to remind the user that the heat pump system enters the shutdown protection state so that the user can process the shutdown protection state in time.
The step of controlling the heat pump system according to the outlet water temperature Tc comprises the following steps: when T2 is more than Tc and less than or equal to T1, the unit is judged to be in a high water outlet temperature running state, at the moment, the whole machine display can remind that the water temperature is high, the heat pump system is controlled to continue running and heating, the liquid spraying valve 9 is opened to spray liquid to the compressor 1, liquid refrigerant is introduced into the compressor 1 to control the exhaust temperature of the compressor 1, and the high load running capacity of the system is improved. When the system runs at high load, the running load of the compressor 1 is increased, the exhaust temperature is increased, and at the moment, the spray liquid cooling technology can reduce the exhaust temperature of the compressor and improve the high-load running capacity of the compressor.
The step of controlling the heat pump system according to the outlet water temperature Tc comprises the following steps: when T3 < Tc ≦ T2, the current discharge temperature Tp of the compressor 1 is detected, and the heat pump system is controlled according to the discharge temperature Tp. When T3 is more than Tc and less than or equal to T2, the water outlet temperature is proper, so that the water temperature does not need to be greatly adjusted, the system operation parameters can be adjusted at the moment, the heat pump system is ensured to operate at better energy efficiency, the operation adjustment of the heat pump system can be carried out according to the exhaust temperature Tp, the exhaust temperature of the compressor 1 is prevented from being too high to exceed the allowable value range, and the complete and reliable operation of the compressor is ensured.
The step of controlling the heat pump system in accordance with the exhaust gas temperature Tp includes: when Tp is more than Tp1, the heat pump system is in the ultrahigh exhaust temperature protection state, so the heat pump system needs to be started and stopped for protection; when Tp is greater than or equal to Tp2 and is not greater than Tp1, the heat pump system is controlled to continue to operate for heating, the liquid spraying valve 9 is opened, liquid is sprayed to the compressor 1, and therefore the exhaust temperature is controlled, the exhaust temperature of the compressor 1 is in a safe temperature range, and the exhaust temperature of the compressor 1 is prevented from being too high; when Tp is more than or equal to Tp3 and is less than or equal to Tp2, the enthalpy-increasing valve 10 is opened, and the exhaust volume of the compressor is increased through the middle air jet, so that the flow of the refrigerant in the condenser is increased, and the heating capacity and the heating performance under the working condition of low ambient temperature are improved; when Tp is less than or equal to Tp3, the liquid spraying valve 9 and the enthalpy increasing valve 10 are closed.
The step of controlling the heat pump system according to the outlet water temperature Tc comprises the following steps: when Tc < T3, enthalpy-increasing valve 10 and liquid-jet valve 9 are closed. When Tc is less than T3, the unit is in a low outlet water temperature operating state, and the outlet water temperature of the unit needs to be increased, so that the enthalpy increasing valve 10 and the liquid spraying valve 9 need to be closed, the exhaust temperature of the compressor 1 needs to be increased, and the outlet water temperature is increased to reach the outlet water temperature required by a user.
The step of controlling the heat pump system according to the outlet water temperature Tc further comprises: and when T2 is less than Tc, controlling the heat pump system to give out a prompt of higher water temperature. When T2 < Tc, the outlet water temperature is higher, so that a prompt needs to be sent to a user, the safety of the user when paying attention to water utilization is ensured, and the safety and the reliability of the operation of the heat pump system are further improved.
The T1 is a preset water temperature judgment value of the outlet water temperature difference, the value range is 15-70 ℃, and the preferable value range is 60 ℃; t2 is a preset water temperature judgment value of the outlet water temperature, the value range is 15-70 ℃, and the optimal value is 55 ℃; t3 is a preset water temperature judgment value of the outlet water temperature, the value range is 15-70 ℃, and the optimal value is 20 ℃; tp1 is a preset temperature judgment value of the exhaust temperature of the compressor, and the value range is 80-150 ℃, and the preferable value is 115 ℃; tp2 is a preset temperature judgment value of the exhaust temperature of the compressor, the value range is 80-150 ℃, and the preferential temperature is 110 ℃; tp3 is a preset temperature judgment value of the exhaust temperature of the compressor, and the value range is 80-150 ℃, and preferably 90 ℃.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (6)
1. A control method of a heat pump system comprises a compressor (1), an indoor heat exchanger (2), an intermediate heat exchanger (3), a first throttling device (4) and an outdoor heat exchanger (5) which are sequentially connected through a main pipeline, an enthalpy increasing pipeline (6) is arranged between a pipeline between the indoor heat exchanger (2) and the intermediate heat exchanger (3) and a gas supplementing port of the compressor (1), the enthalpy increasing pipeline (6) flows through the intermediate heat exchanger (3) and exchanges heat with a refrigerant in the main pipeline at the intermediate heat exchanger (3), a second throttling device (7) is arranged on the enthalpy increasing pipeline (6) between the intermediate heat exchanger (3) and the main pipeline, a liquid spraying pipeline (8) is further connected to a pipeline between the indoor heat exchanger (2) and the outdoor heat exchanger (5), and the other end of the liquid spraying pipeline (8) is connected to the compressor (1), the system is characterized in that a liquid spraying valve (9) is arranged on the liquid spraying pipeline (8), an enthalpy increasing valve (10) is further arranged on an enthalpy increasing pipeline (6) between the second throttling device (7) and the intermediate heat exchanger (3), and the control method comprises the following steps:
controlling the heat pump system to enter a heating mode;
acquiring the current outdoor environment temperature;
when the outdoor environment temperature Th is more than A, closing the enthalpy-increasing valve (10) and the liquid spraying valve (9);
when the outdoor environment temperature B is less than or equal to Th and less than or equal to A, detecting the water temperature Tc, and controlling the heat pump system according to the water outlet temperature Tc;
the step of controlling the heat pump system according to the outlet water temperature Tc comprises the following steps:
when T3 is more than Tc and less than or equal to T2, detecting the current exhaust temperature Tp of the compressor (1), and controlling the heat pump system according to the exhaust temperature Tp;
the step of controlling the heat pump system according to the exhaust temperature Tp includes:
when Tp is more than Tp1, the heat pump system is started to stop for protection;
when Tp2 is more than Tp and less than or equal to Tp1, controlling the heat pump system to continue to operate for heating, and opening the liquid spraying valve (9) to spray liquid to the compressor (1);
when Tp3 is more than Tp and less than or equal to Tp2, the enthalpy-increasing valve (10) is opened;
when Tp is less than or equal to Tp3, the liquid spraying valve (9) and the enthalpy increasing valve (10) are closed.
2. The control method according to claim 1, wherein the step of controlling the heat pump system according to the leaving water temperature Tc comprises:
when Tc is more than T1, the shutdown protection is started for the heat pump system.
3. The control method according to claim 2, wherein the step of controlling the heat pump system according to the leaving water temperature Tc further comprises:
and controlling the display to enter an alarm prompting state while starting the shutdown protection.
4. The control method according to claim 1, wherein the step of controlling the heat pump system according to the leaving water temperature Tc comprises:
and when T2 is more than Tc and less than or equal to T1, controlling the heat pump system to continue to operate for heating, and opening the liquid spraying valve (9) to spray liquid to the compressor (1).
5. The control method according to claim 1, wherein the step of controlling the heat pump system according to the leaving water temperature Tc comprises:
when Tc < T3, the enthalpy-increasing valve (10) and the liquid-spraying valve (9) are closed.
6. The control method according to claim 1, wherein the step of controlling the heat pump system according to the leaving water temperature Tc further comprises:
and when T2 is less than Tc, controlling the heat pump system to give out a prompt of higher water temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010183890.XA CN111425969B (en) | 2020-03-16 | 2020-03-16 | Heat pump system and control method thereof |
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| CN202010183890.XA CN111425969B (en) | 2020-03-16 | 2020-03-16 | Heat pump system and control method thereof |
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| CN111425969B true CN111425969B (en) | 2021-04-02 |
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| CN108592463A (en) * | 2018-04-20 | 2018-09-28 | 珠海格力电器股份有限公司 | Air conditioner heat pump system and control method |
| CN108679882A (en) * | 2018-05-18 | 2018-10-19 | 浙江国祥股份有限公司 | A kind of low-temperature air source heat pump Gas-supplying enthalpy-increasing system |
| CN109668350A (en) * | 2018-12-12 | 2019-04-23 | 广东华天成新能源科技股份有限公司 | High stability heat pump system |
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2020
- 2020-03-16 CN CN202010183890.XA patent/CN111425969B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005207649A (en) * | 2004-01-21 | 2005-08-04 | Denso Corp | Heat pump type water heater |
| US8020393B2 (en) * | 2008-03-31 | 2011-09-20 | Mitsubishi Electric Corporation | Heat pump type hot water supply outdoor apparatus |
| CN106765524A (en) * | 2016-12-16 | 2017-05-31 | 广东美的暖通设备有限公司 | Outer machine control system, source pump and its control method |
| CN108168171A (en) * | 2017-12-19 | 2018-06-15 | 深圳市深蓝电子股份有限公司 | A kind of hot pump in low temp increasing enthalpy EEV control method and device based on discharge superheat |
| CN108592463A (en) * | 2018-04-20 | 2018-09-28 | 珠海格力电器股份有限公司 | Air conditioner heat pump system and control method |
| CN108679882A (en) * | 2018-05-18 | 2018-10-19 | 浙江国祥股份有限公司 | A kind of low-temperature air source heat pump Gas-supplying enthalpy-increasing system |
| CN109668350A (en) * | 2018-12-12 | 2019-04-23 | 广东华天成新能源科技股份有限公司 | High stability heat pump system |
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